JP2018159140A - Sheet manufacturing apparatus, sheet, and sheet manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for appropriately controlling the basis weight distribution of a sheet in manufacturing of a sheet.SOLUTION: An apparatus for manufacturing a sheet comprises a drum part 61 having a plurality of openings 61a, a web formation part having a deposition surface 72a on which a material containing fiber passing through the opening 61a is deposited so as to form a second web W2 on the deposition surface 72a, a sheet formation part for processing the second web W2 to form a sheet, and a control part for controlling the basis weight of the second web W2 deposited on the deposition surface 72a in the direction crossing the transportation direction of the second web W2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a sheet manufacturing apparatus, a sheet, and a sheet manufacturing method.

  2. Description of the Related Art Conventionally, a technique for controlling a paper thickness in a paper manufacturing process is known (see, for example, Patent Document 1). The apparatus described in Patent Document 1 is a paper that is set based on a measured value of paper thickness before winding in a paper making process in which a base paper that has been solid-liquid separated from white water containing pulp components is pressed and dried. The basis weight is controlled so that the deviation from the thickness is small.

JP-A-8-13376

As described in Patent Document 1, it is preferable that the basis weight is uniform when manufacturing a sheet of paper or paper. For this reason, there has been no proposal to give a difference in the basis weight distribution in the plane of the sheet.
An object of the present invention is to appropriately control the basis weight distribution in a sheet when the sheet is manufactured.

In order to solve the above-described problems, a sheet manufacturing apparatus according to the present invention has a sieve portion having a plurality of openings, a deposition surface on which a material containing fibers that have passed through the openings is deposited, and forms a web on the deposition surface. A web forming unit; a sheet forming unit that processes the web to form a sheet; and a control unit that controls a basis weight of the web deposited on the deposition surface in a direction intersecting a conveyance direction of the web. It is characterized by providing.
ADVANTAGE OF THE INVENTION According to this invention, in the sheet manufacturing apparatus which deposits the material containing a fiber and manufactures a sheet | seat, distribution of the basic weight of the manufactured sheet | seat can be controlled by controlling the basic weight of the web to accumulate. As a result, a desired basis weight distribution can be realized in the sheet. For example, by setting the basis weight of the central portion in a predetermined direction in the sheet surface to be larger than that of the end portion, a sheet that is strong in the predetermined direction and has high transportability when transported by a printer or the like can be manufactured.

Further, in the above configuration, the sieve portion includes a rotatable drum portion, a material supply pipe for supplying a carrier airflow containing the material to the inside of the drum portion is disposed, and the material supply pipe is A first supply pipe; a second supply pipe branched from the first supply pipe at a branch portion; and connected to one end of the drum portion in the rotation axis direction; and the branch portion from the first supply pipe And a third supply pipe connected to the other end of the drum portion in the rotation axis direction and provided in the vicinity of the branch portion, and flows through the second supply pipe under the control of the control portion A configuration may be provided that includes a first adjustment unit configured to change a ratio between a conveyance amount of the material by the conveyance airflow and a conveyance amount of the material by the conveyance airflow flowing through the third supply pipe.
According to this configuration, the ratio of the material supplied to the drum unit is changed by changing the ratio of the material conveyance amount by the conveyance airflow from one side to the drum unit and the material conveyance amount by the conveyance airflow from the other side. Can be changed. For this reason, the distribution of the basis weight of the manufactured sheet can be controlled by changing the distribution of the material deposited through the opening of the sieve portion.

Further, in the above configuration, the sieve section supplies a rotatable drum section, a housing section covering at least a portion of the drum section where the opening is formed, and a conveying airflow including the material to the inside of the drum section. A first material supply port for supplying air not containing the material from the outside of the housing part to the inside of the drum part, and a direction of the rotation axis of the drum part The first and second intake ports provided apart from each other, and a second adjustment unit that changes a ratio of the flow rate of air supplied from the first and second intake ports under the control of the control unit; The structure provided with these may be sufficient.
According to this configuration, the distribution of the airflow flowing out from the drum portion can be changed by changing the ratio of the airflow flowing into the drum portion. For this reason, the distribution of the basis weight of the manufactured sheet can be controlled by changing the distribution of the material deposited through the opening of the sieve portion.

Further, in the above configuration, the sieve section supplies a rotatable drum section, a housing section covering at least a portion of the drum section where the opening is formed, and a conveying airflow including the material to the inside of the drum section. A first material supply port for supplying air not containing the material from the outside of the housing part to the inside of the drum part, and a direction of the rotation axis of the drum part The first and second intake ports provided apart from each other, and the position of the first intake port with respect to the material supply port and the second intake port with respect to the material supply port by the control of the control unit The position change part which each changes a position may be provided.
According to this configuration, the distribution of the airflow flowing out from the drum portion can be changed by changing the distribution of the airflow flowing into the drum portion. For this reason, the distribution of the basis weight of the manufactured sheet can be controlled by changing the distribution of the material deposited through the opening of the sieve portion.

Moreover, the said structure WHEREIN: The structure which controls the flow volume of the said conveyance airflow may be sufficient as the said control part.
According to this configuration, the distribution of the material to be deposited can be more effectively controlled by controlling the flow rate of the conveying airflow supplied to the drum unit.

Moreover, the said structure WHEREIN: The structure which has a suction part which attracts | sucks the said material to the said deposition surface with suction airflow, and the structure which controls the flow volume of the said suction airflow may be sufficient.
According to this configuration, the distribution of the material to be deposited can be more effectively controlled by controlling the flow rate of the suction air flow that sucks the material to the deposition surface.

In order to solve the above problems, a sheet manufacturing apparatus according to the present invention includes a web forming unit that forms a web by depositing a material containing fibers on a deposition surface, and a sheet forming unit that forms a sheet by processing the web. And a receiving unit that receives setting of the basis weight distribution of the sheet, and a control unit that controls the basis weight of the web to be deposited on the deposition surface of the web forming unit based on the basis weight distribution received by the receiving unit. It is characterized by having.
ADVANTAGE OF THE INVENTION According to this invention, when depositing the material containing a fiber and manufacturing a sheet | seat, the sheet | seat of the set basic weight can be manufactured by controlling the basic weight of a web according to the setting of the basic weight of a sheet | seat. As a result, a desired basis weight distribution can be realized in the sheet. For example, by setting the basis weight of the central portion in a predetermined direction in the sheet surface to be larger than that of the end portion, a sheet that is strong in the predetermined direction and has high transportability when transported by a printer or the like can be manufactured.

Further, in the above-mentioned configuration, it has a sieve part in which a plurality of openings are formed, and is configured such that the material that has passed through the openings of the sieve part is deposited on the deposition surface, and the receiving part has a basis weight of the sheet The distribution may be a configuration that accepts a basis weight distribution in a predetermined direction that intersects the conveyance direction of the web.
According to this configuration, when the basis weight distribution in a predetermined direction intersecting the web conveyance direction is set, the web basis weight distribution is controlled according to this setting, and a sheet having the set basis weight distribution is manufactured. it can.

Moreover, in the said structure, it has the detection part which detects the thickness or basic weight of the said web or the said sheet | seat, The said control part is based on the detection result of the said detection part, The predetermined direction which cross | intersects the conveyance direction of the said web The structure which controls the basic weight distribution of the said web in may be sufficient.
According to this configuration, the basis weight distribution of the web can be more appropriately controlled by detecting the thickness of the web or sheet.

In order to solve the above problems, the sheet of the present invention is a sheet that is nipped and conveyed by a pair of conveyance rollers, and has a difference in basis weight distribution in a predetermined direction that intersects the conveyance direction. The basis weight of the central portion is larger than that of the end portion in the direction.
According to the present invention, compared with a sheet having the same basis weight of the entire sheet, a sheet having a high stiffness in the conveyance direction when conveyed by a pair of rollers and having excellent conveyance properties can be realized.

Moreover, the said structure WHEREIN: The structure where the thickness of the edge part in the said predetermined direction and the thickness of the said center part are equal may be sufficient.
According to this configuration, it is possible to realize a sheet that is excellent in waist strength and transportability in the transport direction and has no thickness unevenness due to the basis weight distribution.

In order to solve the above problems, the sheet of the present invention is manufactured by the sheet manufacturing apparatus according to any one of the above.
ADVANTAGE OF THE INVENTION According to this invention, the sheet | seat which made waist strength, the conveyance property, etc. in the conveyance direction in the case of conveying with a roller pair a desired state can be obtained easily.

Moreover, in order to solve the said subject, the sheet | seat manufacturing method of this invention was conveyed by the 1st process of depositing the material containing a fiber on a deposition surface, and forming the web, The 2nd process of conveying the said web, A third step of processing the web to form a sheet, and in the first step, a difference is made in the distribution of basis weight in a predetermined direction intersecting the conveyance direction of the web, and the end in the predetermined direction The basis weight of the central part is increased as compared with the part.
ADVANTAGE OF THE INVENTION According to this invention, the material containing a fiber can be deposited, a sheet | seat can be manufactured, and distribution of the basic weight of the manufactured sheet | seat can be controlled. Thereby, compared with a sheet having the same basis weight of the entire sheet, it is possible to realize a sheet that is strong in the conveyance direction when conveyed by a pair of rollers and has excellent conveyance properties.

The schematic diagram which shows the structure of the sheet manufacturing apparatus which concerns on 1st Embodiment. The external appearance perspective view of a sheet manufacturing apparatus. The principal part perspective view of a sheet manufacturing apparatus. Sectional drawing of the principal part of a sheet manufacturing apparatus. The principal part enlarged view of a sheet manufacturing apparatus. Sectional drawing in the AA of FIG. It is explanatory drawing which shows the detection of basic weight with a sheet manufacturing apparatus, and is a top view which shows the arrangement | positioning state of a thickness sensor. It is explanatory drawing which shows the detection of the basic weight by a sheet manufacturing apparatus, and the graph which shows distribution of the basic weight of a 2nd web. The block diagram which shows the structure of the control system of a sheet manufacturing apparatus. The block diagram which shows the functional structure of a control part and a memory | storage part. The flowchart which shows operation | movement of a sheet manufacturing apparatus. The figure which shows the example of a display of a sheet manufacturing apparatus. The principal part enlarged view of the sheet manufacturing apparatus which concerns on 2nd Embodiment. The principal part perspective view of the sheet manufacturing apparatus which concerns on 3rd Embodiment. The principal part disassembled perspective view of the sheet manufacturing apparatus which concerns on 4th Embodiment. The figure which shows the 1st air intake position of the air inlet of the sheet manufacturing apparatus which concerns on 4th Embodiment. The figure which shows the 2nd inlet position of the inlet port of the sheet manufacturing apparatus which concerns on 4th Embodiment. The figure which shows the 3rd intake position of the inlet port of the sheet manufacturing apparatus which concerns on 4th Embodiment. The figure which shows the 4th intake position of the intake port of the sheet manufacturing apparatus which concerns on 4th Embodiment. The chart which shows the basic weight distribution of the sheet which the sheet manufacturing apparatus concerning a 4th embodiment manufactures.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, embodiment described below does not limit the content of this invention described in the claim. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

[First Embodiment]
FIG. 1 is a schematic diagram showing a configuration of a sheet manufacturing apparatus 100 according to the first embodiment to which the present invention is applied.
The sheet manufacturing apparatus 100 described in the present embodiment, for example, after used fiber such as confidential paper as a raw material is defibrated and fiberized by dry process, and then pressurized, heated, and cut to obtain new paper. It is an apparatus suitable for manufacturing. By mixing various additives with the fiberized raw material, it is possible to improve the bond strength and whiteness of paper products and add functions such as color, fragrance, and flame resistance according to the application. Also good. In addition, by controlling the density, thickness, and shape of the paper, it is possible to manufacture paper of various thicknesses and sizes according to the application, such as office paper and business card paper of standard sizes such as A4 and A3. be able to.

  The sheet manufacturing apparatus 100 includes a supply unit 10, a crushing unit 12, a defibrating unit 20, a sorting unit 40, a first web forming unit 45, a rotating body 49, a mixing unit 50, a deposition unit 60, a second web forming unit 70, A conveyance unit 79, a sheet forming unit 80, and a cutting unit 90 are provided.

  Further, the sheet manufacturing apparatus 100 includes humidifying units 202, 204, 206, 208, 210, and 212 for the purpose of humidifying the raw material and / or humidifying a space in which the raw material moves. Specific configurations of the humidifying units 202, 204, 206, 208, 210, and 212 are arbitrary, and examples thereof include a steam type, a vaporization type, a hot air vaporization type, and an ultrasonic type.

  In the present embodiment, the humidifying units 202, 204, 206, and 208 are configured by a vaporization type or warm air vaporization type humidifier. That is, the humidifying units 202, 204, 206, and 208 have a filter (not shown) that wets water, and supplies humidified air with increased humidity by allowing air to pass through the filter. Further, the humidifying units 202, 204, 206, and 208 may include a heater (not shown) that effectively increases the humidity of the humidified air.

  Moreover, in this embodiment, the humidification part 210 and the humidification part 212 are comprised with an ultrasonic humidifier. In other words, the humidifying units 210 and 212 have a vibrating unit (not shown) that atomizes water and supplies mist generated by the vibrating unit.

  The supply unit 10 supplies raw materials to the crushing unit 12. The raw material from which the sheet manufacturing apparatus 100 manufactures a sheet may be anything as long as it contains fibers, and examples thereof include paper, pulp, pulp sheet, cloth including nonwoven fabric, and woven fabric. In the present embodiment, a configuration in which the sheet manufacturing apparatus 100 uses waste paper as a raw material is illustrated. The supply unit 10 may be configured to include, for example, a stacker that accumulates and accumulates used paper and an automatic input device that sends the used paper from the stacker to the crushing unit 12.

  The crushing unit 12 cuts (crushes) the raw material supplied by the supply unit 10 with a crushing blade 14 into a crushing piece. The rough crushing blade 14 cuts the raw material in the air (in the air) or the like. The crushing unit 12 includes, for example, a pair of crushing blades 14 that are cut with a raw material interposed therebetween, and a drive unit that rotates the crushing blades 14, and can have a configuration similar to a so-called shredder. The shape and size of the coarsely crushed pieces are arbitrary and may be suitable for the defibrating process in the defibrating unit 20. For example, the crushing unit 12 cuts the raw material into pieces of paper having a size of 1 to several cm square or less.

  The crushing unit 12 includes a chute (hopper) 9 that receives the crushing pieces that are cut by the crushing blade 14 and fall. The chute 9 has, for example, a taper shape in which the width gradually decreases in the direction in which the coarsely crushed pieces flow (the traveling direction). Therefore, the chute 9 can receive many coarse fragments. The chute 9 is connected to a tube 2 communicating with the defibrating unit 20, and the tube 2 forms a conveying path for conveying the raw material (crushed pieces) cut by the crushing blade 14 to the defibrating unit 20. . The coarsely crushed pieces are collected by the chute 9 and transferred (conveyed) through the tube 2 to the defibrating unit 20.

  Humidified air is supplied by the humidifying unit 202 to the chute 9 included in the crushing unit 12 or in the vicinity of the chute 9. Thereby, the phenomenon that the crushed material cut | judged with the crushed blade 14 adsorb | sucks to the chute | shoot 9 or the inner surface of the pipe | tube 2 by static electricity can be suppressed. In addition, since the crushed material cut by the pulverizing blade 14 is transferred to the defibrating unit 20 together with humidified (high humidity) air, the effect of suppressing adhesion of the defibrated material inside the defibrating unit 20 is also achieved. I can expect. Moreover, the humidification part 202 is good also as a structure which supplies humidified air to the rough crushing blade 14, and neutralizes the raw material which the supply part 10 supplies. Moreover, you may neutralize using an ionizer with the humidification part 202. FIG.

  The defibrating unit 20 defibrates the crushed material cut by the crushing unit 12. More specifically, the defibrating unit 20 defibrates the raw material (crushed pieces) cut by the crushing unit 12 to generate a defibrated material. Here, “defibration” means unraveling a raw material (a material to be defibrated) formed by binding a plurality of fibers into individual fibers. The defibrating unit 20 also has a function of separating substances such as resin particles, ink, toner, and a bleeding inhibitor adhering to the raw material from the fibers.

  What has passed through the defibrating unit 20 is referred to as “defibrated material”. In addition to the defibrated fibers that have been unraveled, the “defibrated material” includes resin particles (resins that bind multiple fibers together), ink, toner, etc. In some cases, additives such as colorants, anti-bleeding agents, paper strength enhancers and the like are included. The shape of the defibrated material that has been unraveled is a string shape or a ribbon shape. The unraveled defibrated material may exist in an unentangled state (independent state) with other undisentangled fibers, or entangled with other undisentangled defibrated material to form a lump. It may exist in a state (a state forming a so-called “dama”).

  The defibrating unit 20 performs defibration by a dry method. Here, performing a process such as defibration in the air (in the air), not in the liquid, is called dry. In the present embodiment, the defibrating unit 20 uses an impeller mill. Specifically, the defibrating unit 20 includes a rotor (not shown) that rotates at high speed, and a liner (not shown) that is positioned on the outer periphery of the rotor. The raw crushed pieces cut by the crushing unit 12 are sandwiched between the rotor and the liner of the defibrating unit 20 and defibrated. The defibrating unit 20 generates an air flow by the rotation of the rotor. With this airflow, the defibrating unit 20 can suck the crushed pieces, which are raw materials, from the tube 2 and convey the defibrated material to the discharge port 24. The defibrated material is sent out from the discharge port 24 to the tube 3 and transferred to the sorting unit 40 through the tube 3.

  Thus, the defibrated material generated in the defibrating unit 20 is conveyed from the defibrating unit 20 to the sorting unit 40 by the air flow generated by the defibrating unit 20. Further, in the present embodiment, the sheet manufacturing apparatus 100 includes a defibrating unit blower 26 that is an airflow generation device, and the defibrated material is conveyed to the sorting unit 40 by the airflow generated by the defibrating unit blower 26. The defibrating unit blower 26 is attached to the pipe 3, sucks air from the defibrating unit 20 together with the defibrated material, and blows it to the sorting unit 40.

  The sorting unit 40 has an inlet 42 through which the defibrated material defibrated from the tube 3 by the defibrating unit 20 flows together with the airflow. The sorting unit 40 sorts the defibrated material to be introduced into the introduction port 42 according to the length of the fiber. Specifically, the sorting unit 40 uses a defibrated material having a size equal to or smaller than a predetermined size among the defibrated material defibrated by the defibrating unit 20 as a first selected material, and a defibrated material larger than the first selected material. Is selected as the second selection. The first selection includes fibers or particles, and the second selection includes, for example, large fibers, undefibrated pieces (crushed pieces that have not been sufficiently defibrated), and defibrated fibers agglomerated or entangled. Including tama etc.

In the present embodiment, the selection unit 40 includes a drum unit 41 (sieving unit) and a housing unit 43 that accommodates the drum unit 41.
The drum portion 41 is a cylindrical sieve portion that is rotationally driven by a motor. The drum part 41 has a net | network (filter, screen), and functions as a sieve part (sieving). Based on the mesh, the drum unit 41 sorts a first selection smaller than the mesh opening (opening) and a second selection larger than the mesh opening. As the net of the drum part 41, for example, a metal net, an expanded metal obtained by stretching a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like can be used.

The defibrated material introduced into the introduction port 42 is sent into the drum portion 41 together with the air current, and the first selected material falls downward from the mesh of the drum portion 41 by the rotation of the drum portion 41. The second selection that cannot pass through the mesh of the drum portion 41 is caused to flow by the airflow flowing into the drum portion 41 from the introduction port 42, led to the discharge port 44, and sent out to the pipe 8.
The tube 8 connects the inside of the drum portion 41 and the tube 2. The second selection flowed through the pipe 8 flows through the pipe 2 together with the coarsely crushed pieces cut by the coarse crushing section 12 and is guided to the introduction port 22 of the defibrating section 20. As a result, the second selected item is returned to the defibrating unit 20 and defibrated.

  In addition, the first selection material selected by the drum unit 41 is dispersed in the air through the mesh of the drum unit 41 and is applied to the mesh belt 46 of the first web forming unit 45 located below the drum unit 41. Descent towards.

  The first web forming unit 45 (separation unit) includes a mesh belt 46 (separation belt), a roller 47, and a suction unit (suction mechanism) 48. The mesh belt 46 is an endless belt, is suspended by three rollers 47, and is conveyed in the direction indicated by the arrow in the drawing by the movement of the rollers 47. The surface of the mesh belt 46 is constituted by a net in which openings of a predetermined size are arranged. Among the first selections descending from the selection unit 40, fine particles having a size that passes through the meshes fall below the mesh belt 46, and fibers of a size that cannot pass through the meshes accumulate on the mesh belt 46, and mesh. It is conveyed together with the belt 46 in the direction of arrow V1. The fine particles falling from the mesh belt 46 include defibrated materials that are relatively small or low in density (resin particles, colorants, additives, etc.), and the sheet manufacturing apparatus 100 does not use them for manufacturing the sheet S. It is a removed product.

  During the normal operation of manufacturing the sheet S, the mesh belt 46 moves at the speed V1. The speed V1 is a predetermined constant speed, and is controlled by the control unit 150 (FIG. 5) described later. The speed V1 at which the mesh belt 46 moves can be regarded as the transport speed at which the mesh belt 46 transports the first web W1, that is, the transport speed of the first web W1 in the sorting unit 40.

Here, the normal operation is an operation excluding the execution of start control and stop control of the sheet manufacturing apparatus 100 to be described later. More specifically, the sheet manufacturing apparatus 100 manufactures a sheet S having a desired quality. It points to while doing.
Accordingly, the defibrated material that has been defibrated by the defibrating unit 20 is sorted into the first sorted product and the second sorted product by the sorting unit 40, and the second sorted product is returned to the defibrating unit 20. Further, the removed material is removed from the first selected material by the first web forming unit 45. The remainder obtained by removing the removed material from the first selection is a material suitable for manufacturing the sheet S, and this material is deposited on the mesh belt 46 to form the first web W1.

  The suction unit 48 sucks air from below the mesh belt 46. The suction unit 48 is connected to the dust collection unit 27 (dust collection device) via the tube 23. The dust collection unit 27 separates the fine particles from the airflow. A collection blower 28 is installed downstream of the dust collection unit 27, and the collection blower 28 functions as a dust collection suction unit that sucks air from the dust collection unit 27. Further, the air discharged from the collection blower 28 is discharged out of the sheet manufacturing apparatus 100 through the pipe 29.

  In this configuration, air is sucked from the suction portion 48 through the dust collection portion 27 by the collection blower 28. In the suction part 48, the fine particles passing through the mesh of the mesh belt 46 are sucked together with air and sent to the dust collecting part 27 through the pipe 23. The dust collection unit 27 separates and accumulates the fine particles that have passed through the mesh belt 46 from the airflow.

  Accordingly, the first web W1 is formed on the mesh belt 46 by depositing fibers obtained by removing the removed material from the first selected material. By the suction of the collection blower 28, the formation of the first web W1 on the mesh belt 46 is promoted, and the removed material is quickly removed.

  Humidified air is supplied to the space including the drum unit 41 by the humidifying unit 204. The humidified air is humidified in the sorting unit 40 by the humidified air. Thereby, the adhesion of the first selection to the mesh belt 46 due to the electrostatic force can be weakened, and the first selection can be easily separated from the mesh belt 46. Furthermore, it is possible to suppress the first selected item from adhering to the rotating body 49 and the inner wall of the housing part 43 due to the electrostatic force. In addition, the removal object can be efficiently sucked by the suction portion 48.

  In the sheet manufacturing apparatus 100, the configuration for sorting and separating the first defibrated material and the second defibrated material is not limited to the sorting unit 40 including the drum unit 41. For example, you may employ | adopt the structure which classifies the defibrated material processed by the defibrating unit 20 with a classifier. As the classifier, for example, a cyclone classifier, an elbow jet classifier, or an eddy classifier can be used. If these classifiers are used, it is possible to sort and separate the first sort and the second sort. Furthermore, the above classifier can realize a configuration in which removed products including relatively small ones having a low density (resin particles, colorants, additives, etc.) among the defibrated materials are separated and removed. For example, it is good also as a structure which removes the microparticles | fine-particles contained in a 1st selection material from a 1st selection material by a classifier. In this case, for example, the second sorted product may be returned to the defibrating unit 20, the removed product is collected by the dust collecting unit 27, and the first sorted product excluding the removed product may be sent to the pipe 54. .

  In the transport path of the mesh belt 46, air containing mist is supplied by the humidifying unit 210 to the downstream side of the sorting unit 40. The mist that is fine particles of water generated by the humidifying unit 210 descends toward the first web W1 and supplies moisture to the first web W1. Thereby, the amount of moisture contained in the first web W1 is adjusted, and adsorption of fibers to the mesh belt 46 due to static electricity can be suppressed.

  The sheet manufacturing apparatus 100 includes a rotating body 49 that divides the first web W <b> 1 accumulated on the mesh belt 46. The first web W <b> 1 is peeled off from the mesh belt 46 at a position where the mesh belt 46 is turned back by the roller 47 and is divided by the rotating body 49.

  The first web W1 is a soft material in which fibers are accumulated to form a web shape, and the rotating body 49 loosens the fibers of the first web W1 and processes it into a state in which the resin can be easily mixed by the mixing unit 50 described later. .

Although the structure of the rotating body 49 is arbitrary, in this embodiment, it can be made into the rotating feather shape which has a plate-shaped blade | wing and rotates. The rotating body 49 is disposed at a position where the first web W1 peeled off from the mesh belt 46 and the blades are in contact with each other. Due to the rotation of the rotating body 49 (for example, the rotation in the direction indicated by the arrow R in the figure), the blade collides with the first web W <b> 1 that is peeled from the mesh belt 46 and is transported, and the subdivided body P is generated.
The rotating body 49 is preferably installed at a position where the blades of the rotating body 49 do not collide with the mesh belt 46. For example, the distance between the tip of the blade of the rotating body 49 and the mesh belt 46 can be set to 0.05 mm or more and 0.5 mm or less. In this case, the rotating body 49 causes the mesh belt 46 to be damaged without being damaged. One web W1 can be divided efficiently.

The subdivided body P divided by the rotating body 49 descends inside the tube 7 and is transferred (conveyed) to the mixing unit 50 by the airflow flowing inside the tube 7.
Further, humidified air is supplied to the space including the rotating body 49 by the humidifying unit 206. Thereby, the phenomenon that fibers are adsorbed by static electricity to the inside of the tube 7 and the blades of the rotating body 49 can be suppressed. In addition, since high-humidity air is supplied to the mixing unit 50 through the pipe 7, the influence of static electricity can also be suppressed in the mixing unit 50.

The mixing unit 50 includes an additive supply unit 52 that supplies an additive containing a resin, a tube 54 that communicates with the tube 7 and through which an airflow including the subdivided body P flows, and a mixing blower 56. The subdivided body P is a fiber obtained by removing the removed material from the first sorted product that has passed through the sorting unit 40 as described above. The mixing unit 50 mixes an additive containing a resin with the fibers constituting the subdivided body P.
In the mixing unit 50, an air flow is generated by the mixing blower 56, and is conveyed while mixing the subdivided body P and the additive in the pipe 54. Moreover, the subdivided body P is loosened in the process of flowing through the inside of the tube 7 and the tube 54, and becomes a finer fiber.

  The additive supply unit 52 is connected to an additive cartridge (not shown) that accumulates the additive, and supplies the additive in the additive cartridge to the tube 54. The additive cartridge may be configured to be detachable from the additive supply unit 52. Moreover, you may provide the structure which replenishes an additive to an additive cartridge. The additive supply unit 52 temporarily stores an additive composed of fine powder or fine particles inside the additive cartridge. The additive supply unit 52 includes a discharge unit 52 a that sends the additive once stored to the pipe 54.

  The discharge unit 52 a includes a feeder (not shown) that sends the additive stored in the additive supply unit 52 to the pipe 54, and a shutter (not shown) that opens and closes a pipeline that connects the feeder and the pipe 54. . When this shutter is closed, the pipe line or opening connecting the discharge part 52a and the pipe 54 is closed, and supply of the additive from the additive supply part 52 to the pipe 54 is cut off.

  In the state where the feeder of the discharge unit 52a is not operating, the additive is not supplied from the discharge unit 52a to the tube 54. However, when a negative pressure is generated in the tube 54, the feeder of the discharge unit 52a is stopped. Even so, the additive may flow to the tube 54. By closing the discharge part 52a, the flow of such an additive can be reliably interrupted.

  The additive supplied by the additive supply unit 52 includes a resin for binding a plurality of fibers. The resin contained in the additive is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, poly Butylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or in combination. That is, the additive may contain a single substance, may be a mixture, or may contain a plurality of types of particles each composed of a single substance or a plurality of substances. The additive may be in the form of a fiber or powder.

The resin contained in the additive is melted by heating and binds a plurality of fibers. Accordingly, in a state where the resin is mixed with the fibers and not heated to a temperature at which the resin melts, the fibers are not bound to each other.
In addition to the resin that binds the fiber, the additive supplied by the additive supply unit 52 includes a colorant for coloring the fiber, fiber aggregation, and resin aggregation depending on the type of sheet to be manufactured. It may also contain a coagulation inhibitor for suppressing odor, and a flame retardant for making the fibers difficult to burn. Moreover, the additive which does not contain a colorant may be colorless or light enough to be considered colorless, or may be white.

  Due to the air flow generated by the mixing blower 56, the subdivided body P descending the tube 7 and the additive supplied by the additive supply unit 52 are sucked into the tube 54 and pass through the mixing blower 56. The fibers constituting the subdivided body P and the additive are mixed by the air flow generated by the mixing blower 56 and / or the action of the rotating part such as the blades of the mixing blower 56, and this mixture (the first sort and the additive) ) Is transferred to the deposition section 60 through the tube 54.

  In addition, the mechanism which mixes a 1st selection material and an additive is not specifically limited, It may stir with the blade | wing which rotates at high speed, and uses rotation of a container like a V-type mixer. These mechanisms may be installed before or after the mixing blower 56.

  The depositing unit 60 deposits the defibrated material defibrated by the defibrating unit 20. More specifically, the depositing unit 60 introduces the mixture that has passed through the mixing unit 50 from the introduction port 62, loosens the entangled defibrated material (fibers), and lowers it while dispersing it in the air. Furthermore, when the additive resin supplied from the additive supply unit 52 is fibrous, the deposition unit 60 loosens the entangled resin. Thereby, the deposition unit 60 can deposit the mixture on the second web forming unit 70 with good uniformity.

  The deposition unit 60 includes a drum unit 61 and a housing unit 63 that accommodates the drum unit 61. The drum part 61 is a cylindrical sieve part that is rotationally driven by a motor. The drum part 61 has a net (filter, screen) and functions as a sieve part (sieving). Due to the mesh, the drum portion 61 allows fibers and particles having a smaller mesh opening (opening) to pass through and lowers the drum portion 61 from the drum portion 61. The configuration of the drum unit 61 is the same as the configuration of the drum unit 41, for example.

  The “sieving part” of the drum part 61 may not have a function of selecting a specific object. That is, the “sieving part” used as the drum part 61 means a thing provided with a net, and the drum part 61 may drop all of the mixture introduced into the drum part 61.

  A second web forming unit 70 is disposed below the drum unit 61. The 2nd web formation part 70 accumulates the passage thing which passed the accumulation part 60, and forms the 2nd web W2. The 2nd web formation part 70 has the mesh belt 72, the roller 74, and the suction mechanism 76 (suction part), for example. The deposition unit 60 and the second web forming unit 70 correspond to a web forming unit. The drum portion 61 corresponds to a sieve portion.

  The mesh belt 72 is an endless belt, is suspended on a plurality of rollers 74, and is conveyed in the direction indicated by the arrow V2 in the drawing by the movement of the rollers 74. The mesh belt 72 is made of, for example, metal, resin, cloth, or non-woven fabric. The surface of the mesh belt 72 is configured by a net having openings of a predetermined size. Among the fibers and particles descending from the drum unit 61, fine particles having a size that passes through the mesh drops to the lower side of the mesh belt 72, and fibers having a size that cannot pass through the mesh are deposited on the mesh belt 72. 72 is conveyed in the direction of the arrow. During the normal operation of manufacturing the sheet S, the mesh belt 72 moves at a constant speed V2. The normal operation is as described above.

  The moving speed V2 of the mesh belt 72 can be regarded as the speed at which the second web W2 is conveyed, and the speed V2 can be referred to as the conveying speed of the second web W2 in the mesh belt 72.

The mesh of the mesh belt 72 is fine and can be sized so that most of the fibers and particles descending from the drum portion 61 are not allowed to pass through.
The suction mechanism 76 is provided below the mesh belt 72 (on the side opposite to the accumulation unit 60 side). The suction mechanism 76 includes a suction blower 77, and can generate an air flow (an air flow directed from the accumulation portion 60 toward the mesh belt 72) downward to the suction mechanism 76 by the suction force of the suction blower 77.

The mixture dispersed in the air by the deposition unit 60 is sucked onto the mesh belt 72 by the suction mechanism 76. Thereby, formation of the 2nd web W2 on the mesh belt 72 can be accelerated | stimulated, and the discharge speed from the deposition part 60 can be enlarged. Furthermore, the suction mechanism 76 can form a downflow in the dropping path of the mixture, and can prevent the defibrated material and additives from being entangled during the dropping.
The suction blower 77 may discharge the air sucked from the suction mechanism 76 out of the sheet manufacturing apparatus 100 through a collection filter (not shown). Alternatively, the air sucked by the suction blower 77 may be sent to the dust collecting unit 27 and the removed matter contained in the air sucked by the suction mechanism 76 may be collected.

  Humidified air is supplied to the space including the drum unit 61 by the humidifying unit 208. The humidified air can humidify the inside of the accumulation portion 60, suppress the adhesion of fibers and particles to the housing portion 63 due to electrostatic force, and quickly drop the fibers and particles onto the mesh belt 72, so Two webs W2 can be formed.

  As described above, the second web W2 that is soft and swelled with a lot of air is formed by performing the process of depositing material on the mesh belt 72 (first process) in the deposition unit 60 and the second web formation unit 70. Is done. The second web W2 deposited on the mesh belt 72 is conveyed to the sheet forming unit 80.

  In the conveyance path of the mesh belt 72, air containing mist is supplied by the humidifying unit 212 to the downstream side of the deposition unit 60. Thereby, the mist which the humidification part 212 produces | generates is supplied to the 2nd web W2, and the moisture content which the 2nd web W2 contains is adjusted. Thereby, adsorption | suction etc. of the fiber to the mesh belt 72 by static electricity can be suppressed.

  In the sheet manufacturing apparatus 100, a conveyance unit 79 that conveys the second web W2 on the mesh belt 72 to the sheet forming unit 80 is provided. The conveyance unit 79 includes, for example, a mesh belt 79a, a roller 79b, and a suction mechanism 79c.

The suction mechanism 79c includes a blower (not shown), and generates an upward airflow on the mesh belt 79a by the suction force of the blower. This air flow sucks the second web W2, and the second web W2 is separated from the mesh belt 72 and is adsorbed by the mesh belt 79a. The mesh belt 79a moves by the rotation of the roller 79b, and conveys the second web W2 to the sheet forming unit 80.
Thus, the conveyance unit 79 realizes a conveyance process (second process) in which the second web W2 formed on the mesh belt 72 is peeled off from the mesh belt 72 and conveyed.

  The sheet forming unit 80 forms the sheet S from the deposit accumulated in the accumulation unit 60. More specifically, the sheet forming unit 80 forms the sheet S by processing the second web W2 (deposit) deposited on the mesh belt 72 and conveyed by the conveying unit 79 (third step). The processing by the sheet forming unit 80 includes pressurization and heating for the second web W2. In the sheet forming unit 80, by applying a load to the second web W2, the second web W2 is compressed and the thickness is homogenized, and the fibers included in the second web W2 and the adhesion between the fibers and the additives are included. To increase. Further, the sheet forming unit 80 heats the fibers of the defibrated material included in the second web W2 and the additive, thereby binding the plurality of fibers in the mixture via the additive (resin). Put on.

The sheet forming unit 80 includes a pressurizing unit 82 that pressurizes the second web W2 and a heating unit 84 that heats the second web W2 pressurized by the pressurizing unit 82.
The pressure unit 82 includes a pair of calendar rollers 85 (pressure rollers), and presses the second web W2 with a predetermined nip pressure. The second web W2 is reduced in thickness by being pressurized, and the density of the second web W2 is increased. One of the pair of calendar rollers 85 is a driving roller driven by a motor (not shown), and the other is a driven roller. The calendar roller 85 is rotated by a driving force of a motor (not shown) and conveys the second web W <b> 2 having a high density by pressurization toward the heating unit 84.

  The heating unit 84 can be configured using, for example, a heating roller (heater roller), a hot press molding machine, a hot plate, a hot air blower, an infrared heater, and a flash fixing device. In the present embodiment, the heating unit 84 includes a pair of heating rollers 86. The heating roller 86 is heated to a preset temperature by a heater installed inside or outside. One of the pair of heating rollers 86 is a driving roller driven by a motor (not shown), and the other is a driven roller. The heating roller 86 heats the sheet S pressed by the calendar roller 85 to form the sheet S. The heating roller 86 is rotated by a driving force of a motor (not shown) and conveys the sheet S toward the cutting unit 90.

  The number of calendar rollers 85 provided in the pressurizing unit 82 and the number of heating rollers 86 provided in the heating unit 84 are not particularly limited.

  Further, in the process of manufacturing the sheet S by the sheet manufacturing apparatus 100, the boundary between the second web W2 and the sheet S is arbitrary. In the present embodiment, in the sheet forming unit 80 that processes the second web W <b> 2 and forms it on the sheet S, the second web W <b> 2 is pressed by the pressing unit 82, and the second web pressed by the pressing unit 82 is used. Further, the sheet heated by the heating unit 84 is called a sheet S. That is, a sheet in which fibers are bound by an additive is called a sheet S. The sheet S is conveyed to the cutting unit 90.

  The cutting unit 90 cuts the sheet S formed by the sheet forming unit 80. In the present embodiment, the cutting unit 90 cuts the sheet S in a direction parallel to the conveyance direction F, and a first cutting unit 92 that cuts the sheet S in a direction that intersects the conveyance direction (F in the drawing) of the sheet S. A second cutting portion 94. The second cutting unit 94 cuts the sheet S that has passed through the first cutting unit 92, for example.

  Thus, a single-sheet sheet S having a predetermined size is formed. The cut sheet S is discharged to the discharge unit 96. The discharge unit 96 includes a tray or a stacker on which a sheet S of a predetermined size is placed.

  In the above configuration, the humidifying units 202, 204, 206, and 208 may be configured by a single vaporizing humidifier. In this case, the humidified air generated by one humidifier may be branched and supplied to the crushing unit 12, the housing unit 43, the pipe 7, and the housing unit 63. This configuration can be easily realized by branching and installing a duct (not shown) for supplying humidified air. Of course, the humidifying sections 202, 204, 206, and 208 can be configured by two or three vaporizing humidifiers.

  Moreover, in the said structure, the humidification parts 210 and 212 may be comprised with one ultrasonic humidifier, and may be comprised with two ultrasonic humidifiers. For example, the air containing the mist which one humidifier produces | generates can be set as the structure branched and supplied to the humidification part 210 and the humidification part 212. FIG.

  Moreover, the blower with which the sheet manufacturing apparatus 100 mentioned above is provided is not limited to the defibrating part blower 26, the collection blower 28, the mixing blower 56, the suction blower 77, and the intermediate blower. For example, it is of course possible to provide a blower for assisting each blower described above in the duct.

In the above configuration, the crushing unit 12 first crushes the raw material and manufactures the sheet S from the raw material that has been crushed. For example, a configuration in which the sheet S is manufactured using fibers as the raw material, It is also possible to do.
For example, the structure which can be thrown into the drum part 41 by using the fiber equivalent to the defibrated material which the defibrating part 20 defibrated may be sufficient. Moreover, what is necessary is just to set it as the structure which can be thrown into the pipe | tube 54 by using the fiber equivalent to the 1st selection thing isolate | separated from the defibrated material as a raw material. In this case, the sheet S can be manufactured by supplying fibers processed from waste paper or pulp to the sheet manufacturing apparatus 100.

FIG. 2 is an external perspective view of the sheet manufacturing apparatus 100.
The sheet manufacturing apparatus 100 includes a housing 220 that accommodates the above-described components. The housing 220 has a substantially box shape including a front part 221 that constitutes the front surface, a side part 222 that constitutes the left and right side surfaces, a back surface part 223 that constitutes the back surface, and an upper surface part 224 that constitutes the upper surface.

  The front part 221 is provided with a part of the supply part 10 exposed, a display part 160 for displaying various information, and an open / close door 230.

  The display unit 160 includes a display panel 116 (FIG. 8) capable of displaying various types of information, and a touch sensor 117 (FIG. 8) disposed on the display panel 116. The display unit 160 functions as a user interface of the sheet manufacturing apparatus 100 by displaying an image on which operation icons and the like are arranged and detecting a user's touch operation on the display unit 160. The open / close door 230 is a door that opens and closes the cartridge containing the additive so as to be exposed.

  FIG. 3 is a perspective view of main parts of the sheet manufacturing apparatus 100, and FIG. 4 is a cross-sectional view of main parts of the sheet manufacturing apparatus 100. 3 and 4 show the configurations of the deposition unit 60 and the second web forming unit 70 in detail.

  As shown in FIGS. 3 and 4, the drum portion 61 has a hollow cylindrical shape and is rotatable about a rotation axis Q (FIG. 4). A plurality of openings 61 a are formed on the outer peripheral surface 61 b of the drum portion 61, and the fibers that have passed through the openings 61 a descend as the drum portion 61 rotates and accumulate on the mesh belt 72 to form the web W. To do. Here, the size, shape, and number of the openings 61 a formed in the drum portion 61 are not particularly limited. For convenience, in FIG. 3 and FIG. 4, the opening 61 a is greatly illustrated with respect to the drum portion 61.

  The housing portion 63 covers at least a portion of the drum portion 61 where the opening 61a is formed (an outer peripheral surface 61b where the opening 61a is formed) via a gap. In the example shown in FIGS. 3 and 4, the housing part 63 includes an opposing wall part 66 having an inner surface facing the outer peripheral surface 60 b, a right side wall 64 and a left side wall 65, and accommodates the drum part 61. The right side wall 64 and the left side wall 65 of the housing part 63 are connected to the opposing wall part 66 and cover the drum part 61 from the rotation axis Q direction (direction in which the rotation axis Q extends).

Here, about the structure of the deposition part 60 and the 2nd web formation part 70, let the rotating shaft Q direction be the left-right direction, the right direction is shown with the code | symbol R, and the left direction is shown with the code | symbol L. The conveyance direction F, the right direction R, and the left direction L are directions in the plane of the second web W2 or in a plane parallel to the plane of the second web W2. The rotation axis Q direction, that is, the RL direction is a direction orthogonal to the conveyance direction F and corresponds to the width direction of the second web W2 and the sheet S. For this reason, the RL direction is referred to as the width direction WD in the following description.
In addition, a direction orthogonal to the plane including the width direction WD and the conveyance direction F is referred to as an up-down direction, an upper direction is indicated by a symbol U, and a lower direction is indicated by a symbol D.

  As shown in FIG. 3, a recess 68 is provided on the inner surfaces of the right side wall 64 and the left side wall 65 of the housing part 63. The recess 68 is provided with a pile seal 69a. The drum portion 61 is rotatably supported at a predetermined interval from the housing portion 63 via a pile seal 69a. The pile seal 69a is configured by, for example, a brush (brush) in which fine hairs are densely planted on the surface of the base portion.

  On the other hand, air containing a material is supplied to the deposition unit 60 through a pipe 54 (material supply pipe). The pipe 54 has a configuration in which one main pipe 54a connected to the mixing blower 56 is branched into branch pipes 54c and 54d at the branch portion 54b. The branch pipe 54c is connected to the air supply pipe 57a, and the branch pipe 54d is connected to the air supply pipe 57b. The main pipe 54a corresponds to the first supply pipe, the branch pipe 54c corresponds to the second supply pipe, and the branch pipe 54d corresponds to the third supply pipe.

  The mixing blower 56 sends a carrier airflow M1, which is air containing material, through the main pipe 54a. The carrier airflow M1 is divided into a carrier airflow M2 flowing through the branch pipe 54c and a carrier airflow M3 flowing through the branch pipe 54d at the branching portion 54b. Here, the material includes the fiber (first sorted product) separated by the sorting unit 40 and the additive (resin) supplied by the additive supply unit 52 as described above, and is a mixture of the fiber and the resin. It is.

  Further, the right side wall 64 and the left side wall 65 of the housing part 63 are connected to air supply pipes 57a and 57b for supplying air containing material to the inside of the drum part 61, respectively. The air supply pipe 57 a passes through the right side wall 64 and communicates with the inside of the drum portion 61. That is, the housing part 63 is provided with a material supply port 64 a that opens to face the internal space of the drum part 61. Similarly, the air supply pipe 57 b passes through the left side wall 65 and communicates with the inside of the drum portion 61. The left side wall 65 is provided with a material supply port 65 a that opens facing the internal space of the drum portion 61.

  The carrier airflow M2 flows into the drum portion 61 from the branch pipe 54c through the air supply pipe 57a. The carrier airflow M3 flows into the drum portion 61 from the branch pipe 54d through the air supply pipe 57b. The material contained in the carrier airflows M <b> 2 and M <b> 3 flows into the drum unit 61 while being humidified by the humidified air supplied from the humidifying unit 206.

  The air supply pipes 57a and 57b penetrate the right side wall 64 and the left side wall 65, respectively. Inside the drum portion 61, airflows (conveyance airflows M2 and M3) containing materials flow in the direction of the rotation axis Q from the air supply pipes 57a and 57b through the material supply ports 64a and 65a. As shown in FIG. 4, the material supply port 64 a is provided at a position overlapping the rotation axis Q when viewed from the direction of the rotation axis Q. Similarly, the material supply port 65a is provided at a position overlapping the rotation axis Q.

  In addition, the housing portion 63 has intake ports 501 and 502 for supplying air containing no material (for example, air outside the housing portion 63) from the direction of the rotation axis Q of the drum portion 61 to the inside of the drum portion 61. Is provided. The intake port 501 is a through hole extending in the direction of the rotation axis Q, and is formed through the right side wall 64. The intake port 502 is a through hole extending in the direction of the rotation axis Q, and is formed through the left side wall 65. Therefore, the space inside the housing part 63 communicates with the outside of the housing part 63 by the intake ports 501 and 502. One of the intake ports 501 and 502 corresponds to a first intake port, and the other corresponds to a second intake port.

  The surroundings of the deposition unit 60 may be surrounded by a partition wall (not shown), and the humidified air A1 may be supplied to a space surrounded by the partition wall (a space where the deposition unit 60 exists) to make the space a humidified space. The humidified air A1 is air that does not contain material. The humidified air A1 is blown by a blower provided in the humidifying unit 208 or a blower connected to the humidifying unit 208 and supplied to the humidifying space.

The intake port 501 is provided apart from the material supply port 64a, and the intake port 502 is provided separately from the material supply port 65a. As shown in FIG. 4, the intake ports 501 and 502 are provided at positions overlapping the inside of the drum portion 61 when viewed from the direction of the rotation axis Q.
In the configuration example shown in FIGS. 3 and 4, the intake ports 501 and 502 are provided, for example, on the mesh belt 72 side (position closer to the mesh belt 72) than the material supply ports 64 a and 65 a. That is, the distance between the intake ports 501 and 502 and the mesh belt 72 is smaller than the distance between the material supply ports 64 a and 65 a and the mesh belt 72.

  On the other hand, a mesh belt 72 is disposed below the housing portion 63. The mesh belt 72 constitutes the lower surface of the housing part 63 and protrudes outside the housing part 63 through an opening 63 a formed in the lower part of the housing part 63. The material descending from the drum unit 61 is deposited on the deposition surface 72 a that is the upper surface of the mesh belt 72.

  As described above, the suction mechanism 76 is disposed below the mesh belt 72, and sucks downward through the mesh belt 72. That is, the suction air flow M4 is generated by the suction blower 77 provided in the suction mechanism 76. As a result, a downflow DF that flows in the downward direction D is generated inside the housing portion 63.

Thus, the carrier airflows M2 and M3 flow into the drum portion 61 into the internal space of the housing portion 63, while the suction mechanism 76 performs suction from below. For this reason, a downflow DF from the inside of the drum portion 61 toward the mesh belt 72 is generated, and the material descends toward the deposition surface 72a through the opening 61a on the downflow DF.
Further, when the air volume sucked by the suction mechanism 76 is larger than the air volume flowing into the drum portion 61 from the material supply ports 64a and 65a, the outside air O1 and O2 flows from the intake ports 501 and 502 due to the difference in the air volume. . The outside air O1 and O2 flows into the drum portion 61 as shown by arrows in FIG. 4, and becomes a part of the downflow DF. In addition, as described above, when the space including the accumulation unit 60 is humidified, the outside air O1 and O2 flowing into the drum unit 61 becomes the humidified air A1.

  Assuming that the air volume sucked by the suction mechanism 76 is the first air volume and that the airflows of the carrier airflows M2 and M3 flowing into the drum unit 61 are the second air volume, the intake ports 501 and 502 have a difference between the first air volume and the second air volume. Corresponding to the outside air O1, O2 is allowed to pass. Therefore, by forming the intake ports 501 and 502, the first air volume and the second air volume can be independently adjusted or controlled. Further, if the first air volume is higher than the second air volume, there is no possibility that the material leaks from the intake ports 501 and 502 to the outside.

  A pile seal 69 b is disposed between the housing part 63 and the mesh belt 72. The pile seal 69b has, for example, a rectangular parallelepiped (substantially rectangular parallelepiped) shape, and is configured by, for example, a brush (brush) in which fine hairs are densely planted on the surface of the base portion. By disposing the pile seal 69 b between the right side wall 64 and the left side wall 65 and the mesh belt 72, it is possible to suppress the defibrated material from leaking from the gap between the housing portion 63 and the mesh belt 72. .

  Further, in the seat manufacturing apparatus 100 of the present embodiment, the intake restriction unit 511 is disposed at the intake port 501 and the intake restriction unit 512 is disposed at the intake port 502. Since the intake restriction portions 511 and 512 have a common structure, the intake restriction portion 512 will be described with reference to FIG. The intake restriction portion 512 includes a restriction plate 512 a that is slidably disposed along the left side wall 65 and a plate driving portion 512 b that moves the restriction plate 512 a on the outer surface of the left side wall 65. The restricting plate 512a is slidable between a position where the intake port 502 opening in the left side wall 65 is closed and a position where the intake port 502 is not blocked. For this reason, by moving the restricting plate 512a, the opening area of the intake port 502 outside the housing portion 63 can be changed. The plate driving unit 512b includes an actuator or the like, operates according to the control of the control device 110, and moves the regulating plate 512a. The control device 110 can adjust the position of the restricting plate 512a by controlling the plate driving unit 512b, and can adjust the opening area of the intake port 502. The intake restriction parts 511 and 512 correspond to the second adjustment part.

  The intake restricting section 511 disposed in the intake port 501 slides between a position where the intake port 501 is closed and a position where the intake port 501 is opened so as to change the opening area of the intake port 501. And the board drive part 511b which moves the control board 511a is provided. The plate drive unit 511b includes an actuator or the like, like the plate drive unit 512b, and operates according to the control of the control device 110 to move the regulation plate 511a. The control device 110 can adjust the opening area of the intake port 501 that opens to the outside of the right side wall 64 by controlling the plate driving unit 511b.

  The air volume of the outside air flowing from the intake ports 501 and 502 is determined by the difference between the first air volume and the second air volume described above. For this reason, when the opening area of the intake port 501 located in the right side wall 64 is reduced by the restriction plate 511a, the ventilation resistance to the outside air O1 flowing from the intake port 501 increases. Along with this, the air volume of the outside air O1 flowing into the drum portion 61 from the intake port 501 is decreased, and the air volume of the outside air O2 flowing from the intake port 502 is increased accordingly. On the other hand, when the opening area of the air inlet 502 located on the left side wall 65 is reduced by the restriction plate 512a, the ventilation resistance to the outside air O2 flowing from the air inlet 502 increases. Along with this, the air volume of the outside air O2 flowing into the drum portion 61 from the intake port 502 decreases, and the air volume of the outside air O1 flowing from the intake port 501 increases accordingly. Further, when the opening areas of the intake ports 501 and 502 are equal, the air volume of the outside air O1 and the air volume of the outside air O2 are balanced. The control device 110 can control the operations of the plate driving units 511b and 512b, respectively. For this reason, the balance of the air volume of the outside air O1 and O2 flowing into the drum unit 61 can be changed by the control of the control device 110. Note that when the opening area of the intake ports 501 and 502 is extremely small and the suction force of the suction mechanism 76 is weak, the total air volume including the outside air O1 and the outside air O2 may be reduced depending on the positions of the restriction plates 511a and 512a. possible.

FIG. 5 is an enlarged view of a main part of the sheet manufacturing apparatus 100, and in particular, an enlarged front view showing the pipe 54 and the airflow restriction unit 401. 6 is a cross-sectional view taken along line AA in FIG.
As described above, the air flow restricting portion 401 is disposed on the pipe 54 above the branching portion 54b. The air flow restriction unit 401 includes an air flow restriction plate 402 that can slide in a direction indicated by a symbol SD in the drawing, and a plate driving unit 403 that moves the air flow restriction plate 402.

  The position of the air flow restriction portion 401 is preferably in the vicinity of the branch portion 54b, and more preferably provided in the state before branching at the branch portion 54b, that is, in the main pipe 54a. Moreover, in the main pipe 54a, it is most preferable that the air flow restriction part 401 is close to the branch part 54b.

  The air flow restriction plate 402 is configured to slide across the main pipe 54 a (along the cross section), and a part or all of the main pipe 54 a is blocked by the air flow restriction plate 402. The cross-sectional area through which the carrier airflow M1 can pass inside the main pipe 54a varies depending on the position of the airflow restriction plate 402. The plate driving unit 403 includes an actuator or the like, and slides the air flow restriction plate 402 according to the control of the control device 110.

  FIG. 6 shows the relationship between the range in which the airflow restricting plate 402 slides and the cross section of the main pipe 54a. The air flow restricting plate 402 overlaps the cross-sectional opening of the main pipe 54a both when the air flow restricting plate 402 is located at the end on the right direction R side of the movement range SD and when it is located at the end on the left direction L side. Don't be. At this position, the airflow restriction plate 402 does not affect the conveying airflow M1 flowing through the main pipe 54a.

  When the air flow restricting plate 402 is moved in the movement range SD, the air flow restricting plate 402 blocks the right direction R side or the left direction L side of the cross section of the main pipe 54 a depending on the position of the air flow restricting plate 402. For this reason, the airflow restriction plate 402 can affect the carrier airflow M1 flowing through the main pipe 54a.

  Specifically, when the air flow restriction plate 402 is overlapped with a part on the right direction R side in the cross section of the main pipe 54a, the right direction from the center of the main pipe 54a (the position of the branch portion 54b shown in FIG. 6). On the R side, the flow path of the carrier airflow M1 becomes narrower. That is, ventilation resistance is generated in the right direction R side inside the main pipe 54a. In this state, the conveyance airflow M1 collides with the airflow restriction plate 402 and flows so as to go around the airflow restriction plate 402, so that the material included in the conveyance airflow M1 flows biased to the left direction L side. In the main pipe 54a, the material is biased and transferred to the left direction L side, so that more material flows in the transport airflow M3 than in the transport airflow M2 in the branch portion 54b. Therefore, more material flows into the drum portion 61 from the left direction L side than from the right direction R side. On the other hand, when the air flow restriction plate 402 is positioned on the left direction L side of the cross section of the main pipe 54a, the cross-sectional area (opening area) on the left direction L side of the main pipe 54a is reduced, so that the material included in the conveyance air flow M1 Flows in the right direction R side. For this reason, the conveyance airflow M2 conveys more material than the conveyance airflow M3, and in the drum portion 61, more material flows from the right side wall 64 side than the left side wall 65 side. Further, except when the air flow restriction plate 402 completely closes the cross-sectional opening of the main pipe 54a, the air flow restriction plate 402 affects the flow velocity of the conveying air flow M1, but the influence on the air volume is slight, and the drum portion 61 The sum of the airflows of the inflowing carrier airflows M2 and M3 hardly changes. However, when the wind force of the mixing blower 56 that generates the conveying airflow M1 is weak and the ratio of the area that is reduced by the airflow restriction plate 402 in the cross-sectional area of the main pipe 54a is large, the airflow can be reduced.

  In the accumulation unit 60, the balance (left-right balance) of the outside air O1 and O2 flowing into the drum unit 61 can be changed and adjusted by controlling the plate driving units 511b and 512b of the intake air restriction units 511 and 512. Further, by controlling the plate driving unit 403 in the air flow restriction unit 401, the balance of the material conveyance amount by the conveyance air flow M2 to the drum unit 61 and the material conveyance amount by the conveyance air flow M3 to the drum unit 61 (the left-right balance). ) Can be changed and adjusted.

The sheet manufacturing apparatus 100 can make the basis weight of the sheet S manufactured by the sheet manufacturing apparatus 100 nonuniform in the width direction WD. Usually, the basis weight is used as a quality standard for various papers and sheets including PPC paper used in offices. Basis weight is a kind of index or standard indicating the properties of paper and sheets, and is generally used in the papermaking industry and the printing industry. The basis weight is the weight per unit area of paper or sheet, and generally has g (gram) / m ² (square meter) as a unit. Normally, one basis weight is shown for one type of paper or sheet, assuming that the basis weight is uniform throughout the paper or sheet.

  On the other hand, the sheet manufacturing apparatus 100 can manufacture the sheet S having a difference in basis weight in the plane. In this embodiment, the basis weight is different in the width direction WD of the sheet S. An example will be described. When the direction crossing the conveyance direction F (for example, the width direction WD) is the short direction of the sheet S after being cut by the cutting unit 90, the cut sheet S is in the length direction. The basis weight is substantially constant, and the basis weight has a difference (unevenness) in the width direction. For example, when the basis weight of the center part is increased in the width direction and the basis weight of the end part is reduced as compared with the center part, the sheet S has a characteristic that the center part is strong and firm. For example, when the sheet S is transported by a printing device such as a printer or a scanner, it has a favorable characteristic that it is difficult to cause a transport failure such as jamming due to its firmness and firmness, and has good transportability. can get.

  The sheet manufacturing apparatus 100 includes a basis weight sensor 309 in order to control the basis weight distribution. The basis weight sensor 309 is a sensor that detects the basis weight of the second web W2 or the sheet S. The basis weight sensor 309 may be installed anywhere after the process in which the second web W2 is formed by the second web forming unit 70, but in the present embodiment, the sheet S is interposed between the sheet forming unit 80 and the cutting unit 90. Install in the transport route.

  7A and 7B are explanatory views showing detection of basis weight by the sheet manufacturing apparatus 100. FIG. FIG. 7A is a plan view showing the arrangement of thickness sensors, and FIG. 7B is a chart showing the basis weight distribution of the second web.

As shown in FIG. 7A, in this embodiment, the basis weight sensor 309 (detection unit) includes a first detection unit 309a, a second detection unit 309b, and a third detection unit 309c. The first detection unit 309a, the second detection unit 309b, and the third detection unit 309c are arranged side by side in the width direction WD with respect to the conveyance path of the sheet S, and detect the basis weight of the sheet S immediately below.
The first detection unit 309a, the second detection unit 309b, and the third detection unit 309c are, for example, reflection type optical sensors, and a light source that emits light to the sheet S and a light reception that receives the reflected light of the sheet S. And outputs an output value corresponding to the amount of received light.

  The first detection unit 309a is disposed at the center of the sheet S in the width direction WD, the second detection unit 309b is disposed at the left end L side of the sheet S, and the third detection unit 309c is disposed in the width direction WD. Is arranged at the end on the right direction R side. Here, a central portion in the width direction WD of the sheet S is indicated by a reference symbol WS1, an end portion on the left direction L side is indicated by a reference symbol WS2, and an end portion on the right direction R side is indicated by a reference symbol WS3. The output value of the first detector 309a indicates the basis weight of the center portion WS1, the output value of the second detector 309b indicates the basis weight of the end portion WS2, and the output value of the third detector 309c is the basis weight of the end portion WS3. Indicates the amount. The control device 110 connected to the basis weight sensor 309 can determine the basis weights of the center portion WS1 and the end portions WS2 and WS3 of the sheet S based on the output value of the basis weight sensor 309.

  The basis weight sensor 309 may be configured to detect the basis weight of the sheet S at the same position as the first detection unit 309a, the second detection unit 309b, and the third detection unit 309c. For example, the transmission type optical sensor May be used. Further, the number of detection parts in the width direction WD is not limited to three, and the basis weight may be detected at a larger number of places.

  In addition, when detecting the second web W2 before being pressed and heated by the sheet forming unit 80, a sensor that detects the thickness is used instead of the sensor that detects the basis weight. You can also. For example, a sensor that detects the thickness in contact with the second web W2 may be arranged, and the sensor may be configured to perform detection at a plurality of locations in the width direction WD. Since the basis weight of the second web W2 is determined by the thickness of the material deposited on the mesh belt 72, when the thickness of the second web W2 is measured, the measured thickness can be converted into the basis weight. . Moreover, when the 2nd web W2 is pressurized and heated and it becomes the shape of the sheet | seat S, basic weight and thickness may not have sufficient correlation. Therefore, when the basis weight is detected downstream from the sheet forming unit 80, more specifically downstream from the pressure unit 82, the basis weight is detected using an optical sensor or the like like the basis weight sensor 309. It is preferable to do.

  FIG. 7B shows an example of the basis weight distribution of the sheet S detected by the control device 110 based on the output value of the basis weight sensor 309. In the chart of FIG. 7B, the horizontal axis indicates the position in the width direction WD, and the vertical axis indicates the basis weight. When detecting the thickness of the second web W2 instead of the basis weight sensor 309, the vertical axis may be replaced with the thickness.

  Under the control of the control device 110, the sheet manufacturing apparatus 100 has a large basis weight at the center in the width direction WD as shown in FIG. 7B, for example. A sheet S having a distribution with a small basis weight can be manufactured. Here, the direction that causes a difference in the basis weight distribution of the sheet S may be a predetermined direction that intersects the transport direction F of the second web W2 and the sheet S, and is not limited to the width direction WD that is orthogonal to the transport direction F.

Advantages in manufacturing this type of sheet S will be described.
The sheet S can be used in an apparatus that conveys the sheet S, such as a printer or a scanner. In particular, in an apparatus having a mechanism for sandwiching and transporting the sheet S by a pair of transport rollers, the transport direction in which the apparatus transports the sheet S intersects a predetermined direction in the sheet S (the width direction WD in the present embodiment). It is useful when In such a case, the sheet S is strong in the transport direction of the apparatus and has excellent transportability. Further, this sheet S exhibits waist strength corresponding to the basis weight of the central part, but the basis weight is smaller than the central part at the end, so the overall basis weight of the sheet S is suppressed. Yes. That is, the sheet S has a waist strength and transportability comparable to a ready-made sheet (paper or the like) having a larger basis weight than the entire basis weight of the sheet S in the central portion, while the sheet S as a whole. The basis weight is not large. Therefore, the sheet S has an advantage that it is lightweight because the basis weight is small compared to the strength of the waist and the transportability. Further, there is an advantage that the amount of material required for manufacturing the sheet S can be reduced as compared with the case where the overall basis weight of the sheet S is increased.

  In addition, the sheet S has a difference in basis weight distribution in a predetermined direction. However, when the sheet S is pressed and heated by the sheet forming unit 80, the thickness of the end portion in the predetermined direction is equal to the thickness of the central portion. It may be. In this case, the sheet S has an advantage that it has excellent waist strength and transportability in the transport direction due to the distribution of basis weight, and has no uneven thickness. In addition, it is not limited to the same case as thickness being equal, What is necessary is just to be substantially the same including the case where an error is included.

FIG. 8 is a block diagram illustrating a configuration of a control system of the sheet manufacturing apparatus 100.
The sheet manufacturing apparatus 100 includes a control device 110 having a main processor 111 that controls each unit of the sheet manufacturing apparatus 100.

  The control device 110 includes a main processor 111, a ROM (Read Only Memory) 112, and a RAM (Random Access Memory) 113. The main processor 111 is an arithmetic processing unit such as a CPU (Central Processing Unit), and controls each part of the sheet manufacturing apparatus 100 by executing a basic control program stored in the ROM 112. The main processor 111 may be configured as a system chip including peripheral circuits such as the ROM 112 and the RAM 113 and other IP cores.

  The ROM 112 stores a program executed by the main processor 111 in a nonvolatile manner. The RAM 113 forms a work area used by the main processor 111 and temporarily stores programs executed by the main processor 111 and data to be processed.

  The nonvolatile storage unit 120 stores a program executed by the main processor 111 and data processed by the main processor 111.

  The display panel 116 is a display panel such as a liquid crystal display, and is installed in front of the sheet manufacturing apparatus 100, for example. The display panel 116 displays the operation state of the sheet manufacturing apparatus 100, various setting values, warning display, and the like according to the control of the main processor 111.

  The touch sensor 117 detects a touch (contact) operation or a press operation. The touch sensor 117 is composed of, for example, a pressure sensing type or capacitance type sensor having a transparent electrode, and is arranged on the display surface of the display panel 116. When the touch sensor 117 detects an operation, the touch sensor 117 outputs operation data including the operation position and the number of operation positions to the main processor 111. The main processor 111 detects an operation on the display panel 116 based on the output of the touch sensor 117 and acquires an operation position. The main processor 111 implements a GUI (Graphical User Interface) operation based on the operation position detected by the touch sensor 117 and the display data 122 being displayed on the display panel 116.

  The control device 110 is connected to a sensor installed in each part of the sheet manufacturing apparatus 100 via a sensor I / F (Interface) 114. The sensor I / F 114 is an interface that acquires a detection value output from the sensor and inputs the detection value to the main processor 111. The sensor I / F 114 may include an A / D (Analogue / Digital) converter that converts an analog signal output from the sensor into digital data. The sensor I / F 114 may supply a drive current to each sensor. Further, the sensor I / F 114 may include a circuit that acquires the output value of each sensor according to the sampling frequency specified by the main processor 111 and outputs the acquired value to the main processor 111.

  The sensor I / F 114 is connected to a used paper remaining amount sensor 301, a paper discharge sensor 303, and a basis weight sensor 309.

  The used paper remaining amount sensor 301 detects the remaining amount of used paper stored in the supply unit 10. For example, when the remaining amount of used paper detected by the used paper remaining amount sensor 301 falls below a set value, the control unit 150 notifies the shortage of used paper.

  The paper discharge sensor 303 detects the amount of sheets S accumulated in the tray or stacker included in the discharge unit 96. The control unit 150 provides a notification when the amount of the sheet S detected by the paper discharge sensor 303 is equal to or greater than a set value.

  The basis weight sensor 309 is a sensor that is arranged along the conveyance path of the sheet S as described above and detects the basis weight of the sheet S by optically reading the sheet S, and is a detection value of optical detection. Is output to the control device 110. The basis weight sensor 309 detects the basis weight at a plurality of positions in a predetermined direction (the width direction WD in the present embodiment) that intersects the conveyance direction of the sheet S. The control device 110 can detect the basis weight distribution in the predetermined direction of the sheet S based on the detection result (output value) of the basis weight sensor 309. As described above, the basis weight sensor 309 is not limited to the conveyance path of the sheet S, and may be installed in the conveyance path of the second web W2 to detect the second web W2.

  The configuration of FIG. 8 is an example. For example, the sheet manufacturing apparatus 100 may include other sensors, and the control device 110 may be able to acquire the detection values of these sensors. For example, the sheet manufacturing apparatus 100 includes a sensor that detects the remaining amount of additive in the additive supply unit 52, a sensor that detects the amount of water in a tank (not shown) in which the sheet manufacturing apparatus 100 stores humidification water, and the like. May be. In addition, the sheet manufacturing apparatus 100 may include a sensor that detects the temperature, the air volume, and the wind speed of the air flowing inside the sheet manufacturing apparatus 100.

  The control device 110 is connected to each drive unit included in the sheet manufacturing apparatus 100 via a drive unit I / F (Interface) 115. The drive part with which the sheet manufacturing apparatus 100 is provided is a motor, a pump, a heater, etc.

  In the drive unit I / F 115, as a control target of the control device 110, a crushing unit 311, a defibrating unit 312, a paper feed motor 313, an additive supply unit 314, a blower 315, a humidifying unit 316, a drum unit driving unit 317, And the dividing part 319 is connected.

  The crushing unit 311 includes a driving unit such as a motor that rotates a cutting blade (not shown) that cuts used paper as a raw material in the crushing unit 12. The defibrating unit 312 includes a drive unit such as a motor that rotates a rotor (not shown) included in the defibrating unit 20. The paper feed motor 313 is a motor that supplies used paper from the supply unit 10. The additive supply unit 314 includes a motor that drives a screw feeder that feeds the additive in the discharge unit 52a, and a drive unit such as a motor and an actuator that opens and closes the discharge unit 52a. The blower 315 includes a defibrating unit blower 26, a collection blower 28, a mixing blower 56, a suction blower 77, and the like. Each of these blowers may be individually connected to the drive unit I / F 115.

  The humidifying unit 316 includes humidifying units 202, 204, 206, and 208 configured by vaporizing or warm-air vaporizing humidifiers, and humidifying units 210 and 212 configured by ultrasonic humidifiers that generate mist. Including.

  The drum unit driving unit 317 includes driving units such as a motor that rotates the drum unit 41 and a motor that rotates the drum unit 61.

The belt driving unit 318 includes driving units such as a motor that drives the mesh belt 46, a motor that drives the mesh belt 72, and a motor that drives the mesh belt 79a. Also. The belt driving unit 318 may include a detection unit such as a rotary encoder or a rotation angle sensor that detects the rotation speed, rotation amount, rotation angle, and the like of each motor.
The dividing unit 319 includes a driving unit such as a motor that rotates the rotating body 49.

  The basis weight adjustment unit 341 is a drive unit that operates according to the control of the control device 110, and has a wind direction, an air volume, a wind speed, and a left / right balance between the airflows M 1, M 2, and M 3 of the material flowing into the deposition unit 60. Change or adjust at least one of In the present embodiment, the plate driving unit 403 that drives the air flow restriction unit 401 corresponds to the basis weight adjustment unit 341.

  The air intake adjustment unit 342 is a drive unit that operates according to the control of the control device 110, and at least one of the wind direction, the air volume, the wind speed, and the left / right balance of the air that does not include the material sucked by the deposition unit 60. Change or adjust. In the present embodiment, the intake restriction units 511 and 512 correspond to the intake adjustment unit 342, and more specifically, the plate driving units 511b and 512b correspond to the intake adjustment unit 342. The plate driving units 511b and 512b may be configured to operate independently under the control of the control device 110, or may operate in conjunction with each other.

  FIG. 9 is a functional block diagram of the sheet manufacturing apparatus 100 and shows functional configurations of the storage unit 140 and the control unit 150. The storage unit 140 is a logical storage unit configured by the nonvolatile storage unit 120 (FIG. 8).

  The control unit 150 and various functional units included in the control unit 150 are formed by the cooperation of software and hardware when the main processor 111 executes a program. Examples of the hardware configuring these functional units include the main processor 111 and the nonvolatile storage unit 120.

  The storage unit 140 stores, for example, setting data 121, display data 122, and basis weight setting data 123. The setting data 121 includes data for setting the operation of the sheet manufacturing apparatus 100. For example, the setting data 121 includes data such as characteristics of various sensors included in the sheet manufacturing apparatus 100 and threshold values used in processing in which the main processor 111 detects an abnormality based on detection values of the various sensors. The display data 122 is screen data that the main processor 111 displays on the display panel 116. The display data 122 may be fixed image data, or data for setting a screen display for displaying data generated or acquired by the main processor 111.

  The basis weight setting data 123 is data that associates the basis weight distribution of the sheet S manufactured by the sheet manufacturing apparatus 100 with the operating conditions of the sheet manufacturing apparatus 100.

  The sheet manufacturing apparatus 100 can manufacture the sheets S in various states by controlling the basis weight adjusting unit 341 and / or the intake air adjusting unit 342 with the control device 110. That is, the basis weight distribution in the predetermined direction of the sheet S can be changed by the operation of the basis weight adjustment unit 341 and / or the intake air adjustment unit 342. For this reason, in order to make the basis weight distribution in the predetermined direction of the sheet S into a desired state, it is possible to finely adjust (tune) the driving amount of the basis weight adjusting unit 341 and / or the intake air adjusting unit 342.

  Furthermore, in the sheet manufacturing apparatus 100 of the present embodiment, one or more basis weight distributions are preset for the basis weight distribution in a predetermined direction of the sheet S so as to be selectable in advance. Specifically, the storage unit 140 associates one or more basis weight distributions with parameters that define the operations of the basis weight adjustment unit 341 and / or the intake adjustment unit 342 for realizing each basis weight distribution. Remember. This data corresponds to the basis weight setting data 123. According to this configuration, when one basis weight distribution is selected from the selectable basis weight distributions, the driving parameters of the basis weight adjustment unit 341 and / or the intake air adjustment unit 342 corresponding to the selected basis weight distribution are set to the basis weight. Obtained from the amount setting data 123. Then, the sheet manufacturing apparatus 100 operates according to the acquired drive parameters. Accordingly, the sheet S having the selected basis weight distribution can be quickly manufactured without adjusting the operation amount of the basis weight adjusting unit 341 and / or the intake air adjusting unit 342, and the basis weight distribution of the sheet S can be obtained. Can also be changed.

  The control unit 150 has functions of an operating system (OS) 151, a display control unit 152, an operation detection unit 153, a detection control unit 154, a drive control unit 155, and a basis weight adjustment control unit 157.

  The function of the operating system 151 is a function of a control program stored in the storage unit 140, and each unit of the other control unit 150 is a function of an application program executed on the operating system 151.

The display control unit 152 displays an image on the display panel 116 based on the display data 122.
The operation detection unit 153 detects an operation on the touch sensor 117. The operation detection unit 153 identifies the content of the GUI operation corresponding to the operation position of the operation detected by the touch sensor 117.

  The detection control unit 154 acquires detection values of various sensors connected to the sensor I / F 114. In addition, the detection control unit 154 determines the detection value of the sensor connected to the sensor I / F 114 by comparing it with a preset threshold value (setting value). When the determination result corresponds to a condition for performing notification, the detection control unit 154 outputs the notification content to the display control unit 152 and causes the display control unit 152 to perform notification using an image or text.

  The drive control unit 155 controls the start (start) and stop of each drive unit connected via the drive unit I / F 115. Further, the drive control unit 155 may be configured to control the rotational speed for the defibrating unit blower 26, the mixing blower 56, and the like.

  The basis weight adjustment control unit 157 and the drive control unit 155 refer to the basis weight setting data 123 when the setting relating to the basis weight distribution is made by the operation detected by the operation detection unit 153. The basis weight adjustment control unit 157 acquires from the basis weight setting data 123 the drive parameters of the basis weight adjustment unit 341 and / or the intake air adjustment unit 342 corresponding to the setting. The basis weight adjustment control unit 157 determines the drive amounts of the basis weight adjustment unit 341 and the intake air adjustment unit 342 according to the acquired drive parameters, and operates the basis weight adjustment unit 341 and the intake air adjustment unit 342.

  Further, the basis weight adjustment control unit 157 causes the basis weight sensor 309 to perform detection, acquires the output value of the basis weight sensor 309, and obtains the basis weight distribution of the sheet S based on the acquired output value. The basis weight adjustment control unit 157 compares the basis weight distribution of the sheet S set by the operation detected by the operation detection unit 153 with the basis weight distribution obtained from the output value of the basis weight sensor 309. It is determined whether or not the target state is reached. When the basis weight distribution deviates from the range that can be regarded as the target state, the basis weight adjustment control unit 157 adjusts the drive parameters of the basis weight adjustment unit 341 and the intake air adjustment unit 342 so that the basis weight distribution of the sheet S is Control to achieve the target state.

FIG. 10 is a flowchart showing the operation of the sheet manufacturing apparatus 100.
When the power of the sheet manufacturing apparatus 100 is turned on (step ST1), the control unit 150 starts setting the operation of the sheet manufacturing apparatus 100 (step ST2). The setting of the operation of the sheet manufacturing apparatus 100 is performed, for example, by displaying a setting screen on the display unit 160 and a user input operation on the setting screen. After the size and number of sheets S manufactured by the sheet manufacturing apparatus 100 are set, the control unit 150 causes the display unit 160 to display the target distribution selection screen 160a (step ST3).

  FIG. 11 is a schematic diagram showing a display example of the sheet manufacturing apparatus 100, and shows an example of a target distribution selection screen 160a. In the target distribution selection screen 160a illustrated in FIG. 11, the name of the screen is displayed, and a basis weight distribution selection image 162 and a selection state display unit 163 are arranged.

  The basis weight distribution selection image 162 is an operation image for the user to instruct the basis weight distribution of the sheet S. The basis weight distribution selection image 162 includes images 162 a, 162 b, and 162 c corresponding to the types of basis weight distribution of the sheet S that can be set by the sheet manufacturing apparatus 100. Each of the images 162a, 162b, and 162c includes an image that describes the basis weight distribution of the sheet S. When any of the images 162a, 162b, and 162c is touch-operated, a basis weight distribution corresponding to the touch-operated image is selected. The images 162a, 162b, and 162c may include characters that express the basis weight distribution of the sheet S in a linguistic expression, or may include a number assigned in advance to the basis weight distribution of the sheet S.

The selection state display unit 163 is an image indicating that a touch operation on the images 162a, 162b, and 162c of the basis weight distribution selection image 162 is detected. That is, the image shows the basis weight distribution selected by the touch operation among the images 162a, 162b, and 162c.
As described above, the user can easily select the basis weight distribution of the sheet S to be manufactured by the sheet manufacturing apparatus 100 from the plurality of basis weight distribution states using the target distribution selection screen 160a.

  The control unit 150 determines whether the basis weight distribution is selected by the touch operation on the display unit 160, and the setting is completed (step ST4). While the setting is not completed (step ST4; No), it waits until it is selected. When the setting is completed (step ST4; Yes), the control unit 150 acquires and sets the drive parameters of the basis weight adjustment unit 341 and / or the intake adjustment unit 342 based on the data of the basis weight setting data 123 (step) ST5).

  Subsequently, the control unit 150 adjusts the driving states of the basis weight adjusting unit 341 and the intake air adjusting unit 342 in accordance with the set driving parameters (step ST6).

  The control unit 150 starts a startup sequence for initializing each unit of the sheet manufacturing apparatus 100 (step ST6), and shifts to a state in which the sheet S can be manufactured. In the activation sequence, various motors and blowers controlled by the drive control unit 155 are appropriately activated in an appropriate order. In the startup sequence, each unit including the basis weight adjusting unit 341 and the intake air adjusting unit 342 operates according to the set value.

  The control unit 150 starts detection by the basis weight sensor 309 during or after execution of the activation sequence, and causes detection by the basis weight sensor 309 at a sampling period (step ST9). The control unit 150 detects the basis weight distribution in the predetermined direction of the sheet S based on the output value of the basis weight sensor 309 (step ST10), and whether the calculated basis weight distribution corresponds to the state selected in step ST4. It is determined whether or not (step ST11). If the basis weight distribution obtained from the output value of the basis weight sensor 309 in step ST11 does not completely match the basis weight distribution set in step ST4, it is within the allowable range. Make an affirmative decision. For example, the allowable range of the basis weight distribution may be set in the control unit 150 in advance. Alternatively, the basis weight distribution of the sheet S and a range that can be regarded as the basis weight distribution may be set in the basis weight setting data 123.

  When the basis weight distribution is within the range that can be regarded as the target state or the target state (step ST11; Yes), the control unit 150 selects the basis weight distribution of the sheet S by the display on the display unit 160 or the like. It is notified that the state has been reached (step ST12).

  The control unit 150 determines whether or not to end the operation of the sheet manufacturing apparatus 100 (step ST13). While the trigger for ending the operation is not established (step ST13; No), the control unit 150 continues the operation. When a trigger for stopping the operation, such as an instruction to stop the operation, is generated (step ST13; Yes), the control unit 150 executes a stop sequence (step ST14).

  On the other hand, when the basis weight distribution is not within the range that can be regarded as the target state (step ST11; No), the control unit 150 changes the drive parameter of the sheet manufacturing apparatus 100 (step ST15), and returns to step ST9. More specifically, the control unit 150 sets the drive parameters of the basis weight adjusting unit 341 and the intake air adjusting unit 342 so that the basis weight distribution of the sheet S obtained based on the output value of the basis weight sensor 309 approaches the target state. change. The control unit 150 adjusts the operation state of the basis weight adjusting unit 341 and the intake air adjusting unit 342 in accordance with the drive parameter changed in step ST15 (step ST16), and returns to step ST9.

  As described above, the sheet manufacturing apparatus 100 according to the first embodiment includes the drum portion 61 having a plurality of openings 61a. Further, the sheet S has a deposition surface 72a on which the material containing the fiber that has passed through the opening 61a is deposited, and forms the second web W2 on the deposition surface 72a, and the second web W2 is processed. And a sheet forming unit 80 for forming the sheet. In addition, the sheet manufacturing apparatus 100 includes a control unit 150 that controls the basis weight of the second web W2 deposited on the deposition surface 72a in a direction that intersects the conveyance direction of the second web W2.

  According to the sheet manufacturing apparatus 100 to which the present invention is applied, the control method of the sheet manufacturing apparatus 100, and the sheet manufacturing method, the basis weight distribution of the sheet S to be manufactured by controlling the basis weight of the second web W2. Can be controlled. Thereby, a desired basis weight distribution can be realized in the sheet S. For example, by making the basis weight of the central portion larger than that of the end portion in a predetermined direction (for example, the width direction WD) in the surface of the sheet S, the waist in the predetermined direction is strong, and transportability when transported by a printer or the like is increased. A high sheet S can be manufactured.

  The drum unit 61 is configured to be rotatable, and the drum unit 61 is provided with a pipe 54 for supplying a conveying airflow M1 containing a material to the inside of the drum unit 61. The pipe 54 includes a main pipe 54a, a branch pipe 54c, and a branch pipe 54d. The branch pipe 54c branches from the main pipe 54a at the branch part 54b and is connected to one end of the drum part 61 in the rotation axis direction. The branch pipe 54d branches from the main pipe 54a at the branch part 54b, and is connected to the other end of the drum part 61 in the rotation axis direction. Further, the ratio of the material conveyance amount by the conveyance air flow M2 flowing through the branch pipe 54c and the material conveyance amount by the conveyance air flow M3 flowing through the branch pipe 54d is changed by the control of the control unit 150. An air flow restriction unit 401 is provided. Accordingly, the drum unit 61 is changed by changing the ratio of the material conveyance amount by the conveyance air flow M2 supplying the material from one side to the drum unit 61 and the material conveyance amount by the conveyance air flow M3 supplying the material from the other. The ratio of the material supplied to the can be changed. For this reason, the distribution of the basis weight of the manufactured sheet S can be controlled by changing the distribution of the material deposited through the opening 61 a of the drum portion 61.

  The drum portion 61 includes a housing portion 63 that covers at least a portion of the drum portion 61 in which the opening 61a is formed, and material supply ports 64a and 65a for supplying a conveying airflow M1 containing material to the inside of the drum portion 61. Is provided. The drum portion 61 is an intake port for supplying outside air O1 and O2, which are air containing no material, from the outside of the housing portion 63 to the inside of the drum portion 61, and is separated in the rotation axis direction of the drum portion 61. An intake port 501 and an intake port 502 are provided. In addition, intake control units 511 and 512 that change the ratio of the flow rate of air supplied from the intake ports 501 and 502 under the control of the control unit 150 are provided. According to this configuration, the distribution of the airflow flowing out from the drum portion 61 can be changed by changing the ratio of the outside air O1 and the outside air O2 flowing into the drum portion 61. For this reason, the distribution of the basis weight of the manufactured sheet S can be controlled by changing the distribution in the width direction WD of the material deposited through the opening 61a of the drum portion 61.

  Moreover, the control part 150 may control the flow volume of the conveyance airflow M1. For example, the control unit 150 may control the air volume of the transport airflows M1, M2, and M3 by controlling the air volume of the mixing blower 56. In this case, the distribution of the material deposited on the deposition surface 72a can be controlled more effectively.

  In addition, the control unit 150 may control the flow rate of the suction airflow M4. For example, the control unit 150 may control the air volume of the suction air flow M4 by controlling the air volume of the suction blower 77. In this case, the distribution of the material deposited on the deposition surface 72a can be controlled more effectively.

The sheet manufacturing apparatus 100 includes a second web forming unit 70 that forms a second web W2 by depositing a fiber-containing material on the deposition surface 72a, and a sheet forming unit 80 that processes the second web W2 to form a sheet S. With. In addition, the operation detection unit 153 serving as a reception unit that receives the setting of the basis weight distribution of the sheet S, and the second web formation unit 70 that accumulates on the accumulation surface 72a based on the basis weight distribution received by the operation detection unit 153. And a control unit 150 that controls the basis weight of the two webs W2.
According to this configuration, when the sheet S is manufactured by depositing a material containing fibers, the basis weight of the second web W2 is controlled according to the basis weight setting of the sheet S, thereby setting the basis weight sheet. S can be manufactured. Thereby, the desired basis weight distribution in the sheet S can be realized (on demand). For example, by making the basis weight of the central portion larger than that of the end portion in a predetermined direction within the surface of the sheet S, it is possible to manufacture a sheet S that is strong in the predetermined direction and has high transportability when transported by a printer or the like.

  The sheet manufacturing apparatus 100 includes a drum portion 61 in which a plurality of openings 61a are formed, and the material that has passed through the openings 61a of the drum portion 61 is configured to be deposited on the deposition surface 72a. For example, using the target distribution selection screen 160a, the operation detection unit 153 receives a basis weight distribution in a predetermined direction (width direction WD) intersecting the conveyance direction F of the second web W2 as the basis weight distribution of the sheet S. Thereby, when the basis weight distribution in the predetermined direction crossing the conveyance direction of the second web W2 is set, the basis weight distribution of the second web W2 is controlled according to this setting, and the set basis weight distribution is obtained. Sheet S can be manufactured.

  In addition, the sheet manufacturing apparatus 100 includes a basis weight sensor 309 that detects the thickness or basis weight of the second web W2 or the sheet S. The basis weight sensor 309 of the present embodiment detects the basis weight of the sheet S. The control unit 150 controls the basis weight distribution of the second web W2 in a predetermined direction that intersects the transport direction F based on the detection result of the basis weight sensor 309. In this case, the basis weight distribution of the sheet S can be controlled more appropriately.

  In addition, the sheet S manufactured by the sheet manufacturing apparatus 100 and the sheet manufacturing method by the sheet manufacturing apparatus 100 has a basis weight in a predetermined direction that intersects the transport direction when the sheet S is sandwiched and transported by the pair of transport rollers. Differences are made in the distribution. The sheet S has a larger basis weight at the center than at the end in the predetermined direction. As a result, the sheet S can be realized as a sheet S that has a high stiffness in the transport direction when transported by a pair of rollers and is excellent in transportability as compared with a sheet having the same basis weight of the entire sheet. Further, the sheet S may be manufactured so that the thickness of the end portion in the predetermined direction is equal to the thickness of the central portion. In this case, a sheet S having excellent waist strength and transportability in the transport direction and having no unevenness of thickness can be realized by the basis weight distribution.

[Second Embodiment]
FIG. 12 is an enlarged view of a main part of the sheet manufacturing apparatus 101 according to the second embodiment to which the present invention is applied, and in particular, an enlarged front view showing the pipe 54 and the airflow restriction part 411.

  Since the sheet manufacturing apparatus 101 is configured in the same manner as the sheet manufacturing apparatus 100 (FIG. 1) except for an airflow regulating unit 411 described below, the same components are denoted by the same reference numerals and description thereof is omitted.

  The airflow restriction part 411 shown in FIG. 12 is disposed above (upstream side) the branch part 54 b of the pipe 54. The air flow restricting portion 411 rotates the plate-shaped air flow restricting rotating plate 412 arranged from the side wall side of the main pipe 54a toward the axis center, and the air flow restricting rotating plate 412 in the direction indicated by the arrow RD in the drawing. And a rotating part 413. In the example of FIG. 12, a pair of airflow regulating rotation plates 412 are arranged one by one on the right direction R side and the left direction L side of the main pipe 54a. Each airflow regulating rotation plate 412 is independently rotated by the rotation unit 413 under the control of the control device 110.

  The position of the pair of airflow regulating rotation plates 412 corresponds to the position on the branch pipe 54c side and the position on the branch pipe 54d side with reference to the branch position 54e where the branching section 54b branches the transport airflow M1.

  The air flow restriction unit 411 is installed in place of the air flow restriction unit 401 (FIG. 5) described in the first embodiment. That is, the sheet manufacturing apparatus 101 has a configuration in which the airflow restriction unit 401 of the sheet manufacturing apparatus 100 is replaced with the airflow restriction unit 411.

  The airflow restriction unit 411 includes a pair of airflow restriction rotation plates 412 and a rotation unit 413 that moves the pair of airflow restriction rotation plates 412.

  The position of the air flow restriction portion 411 is preferably in the vicinity of the branch portion 54b, and more preferably provided in the state before branching at the branch portion 54b, that is, in the main pipe 54a. Moreover, in the main pipe 54a, it is most preferable that the airflow restriction part 411 is close to the branch part 54b.

  The air flow regulating rotation plate 412 is rotated by the rotation unit 413 and is displaced between a position crossing the cross-sectional opening of the main pipe 54a and a position along the axial direction of the main pipe 54a. The area where the airflow regulating rotation plate 412 projects in the cross-sectional direction of the main pipe 54 a is determined by the rotation amount of the rotation unit 413. Therefore, the cross-sectional area through which the carrier airflow M1 can pass inside the main pipe 54a changes due to the operation of the rotating unit 413. The rotation unit 413 corresponds to the basis weight adjustment unit 341, and the control device 110 can control the on / off of the operation of the rotation unit 413 and the rotation amount of the rotation unit 413. The control device 110 may be configured to control each of the pair of rotation units 413 independently, or may perform control for interlocking the pair of rotation units 413. In addition, as shown in FIG. 12, it is preferable to rotate the airflow regulating rotation plate 412 on the downstream side of the rotation unit 413. Thereby, the retention of the material in the airflow control part 411 can be suppressed.

  When the air flow restriction rotation plate 412 rotates, the flow of the carrier air flow M1 is blocked by the air flow restriction rotation plate 412 on the right direction R side or the left direction L side of the cross section of the main pipe 54a. In other words, the airflow restriction turning plate 412 can affect the transport airflow M1 flowing through the main pipe 54a.

  For example, when the air flow restricting rotation plate 412 located on the right direction R side is projected in the center direction of the main pipe 54a, the air flow restriction M1 of the transport air flow M1 is located on the right direction R side from the diversion position 54e that is the center of the main pipe 54a. The flow path becomes narrower. For this reason, ventilation resistance is generated in the right direction R side inside the main pipe 54a. In this state, the conveyance airflow M1 collides with the airflow restriction rotation plate 412 and flows so as to go around the airflow restriction rotation plate 412. Therefore, the material included in the conveyance airflow M1 flows in the left direction L side. In the main pipe 54a, the material is biased and transferred to the left direction L side, so that more material flows in the transport airflow M3 than in the transport airflow M2 in the branch portion 54b. Therefore, more material flows into the drum portion 61 from the left direction L side than from the right direction R side.

  On the other hand, when the air flow restricting rotation plate 412 positioned on the left direction L side is projected in the center direction of the main pipe 54a, the air flow restriction air flow is on the left direction L side with respect to the diversion position 54e that is the center of the main pipe 54a. The channel of M1 becomes narrow. For this reason, ventilation resistance is generated in the left direction L side inside the main pipe 54a. In this state, the conveyance airflow M1 collides with the airflow restriction rotation plate 412 and flows so as to go around the airflow restriction rotation plate 412. Therefore, the material included in the conveyance airflow M1 flows in a right direction R side. In the main pipe 54a, the material is shifted to the right direction R side so that more material flows in the transport airflow M2 than in the transport airflow M3 in the branch portion 54b. Therefore, more material flows into the drum portion 61 from the right direction R side than from the left direction L side.

  In addition, the airflow regulating rotation plate 412 affects the flow velocity of the conveying airflow M1, but the influence on the airflow is slight, and the sum of the airflows of the conveying airflows M2 and M3 flowing into the drum portion 61 is not substantially changed. However, when the wind force of the mixing blower 56 that generates the conveying airflow M1 is weak and the ratio of the area that is reduced by the airflow regulating rotating plate 412 in the cross-sectional area of the main pipe 54a is large, the airflow can be reduced.

  According to the sheet manufacturing apparatus 101 of the second embodiment, the balance between the left and right of the material flowing from the tube 54 to the drum unit 61 can be changed by controlling the airflow regulating unit 411 by the basis weight adjustment control unit 157. . This effect is the same as the effect obtained when the basis weight adjustment control unit 157 controls the air flow restriction unit 401 in the first embodiment.

  Therefore, the sheet manufacturing apparatus 101 of the second embodiment has the same effects as the sheet manufacturing apparatus 100. In addition, the air flow restriction rotating plate 412 constituting the air flow restriction unit 411 can be realized with a smaller size than the air flow restriction plate 402 included in the air flow restriction unit 401 (FIG. 5). For this reason, when there is a small space outside the main pipe 54a, the air flow restricting portion 411 is more advantageous.

  In the second embodiment, the tube 54 is not limited to a tube having a circular cross section, and the tube 54 may be a tube having a rectangular cross section. In other words, at least at the position where the air flow restricting portion 411 is provided, the main pipe 54a is configured by a cylinder having a rectangular (square) cross section. In this case, by making the airflow restriction rotation plate 412 a rectangular plate, the flow of the carrier airflow M1 can be more effectively influenced by the pair of intake air restriction portions 512, and the material of the drum portion 61 can be reduced. Distribution can be adjusted efficiently.

[Third Embodiment]
FIG. 13 is a perspective view of a main part of the sheet manufacturing apparatus 102 according to the third embodiment, and particularly shows the configuration of the stacking unit 60 and the second web forming unit 70.

  Since the sheet manufacturing apparatus 102 is configured in the same manner as the sheet manufacturing apparatus 100 (FIG. 1) except for the stacking unit 60a described below, the same components are denoted by the same reference numerals and description thereof is omitted. The sheet manufacturing apparatus 102 has a configuration in which the accumulating unit 60 (FIG. 3) of the sheet manufacturing apparatus 100 is replaced with the accumulating unit 60 a and air supply pipes 522 a and 522 b and air supply apparatuses 523 a and 523 b are provided.

  The accumulation section 60a includes a right side wall 64b instead of the right side wall 64 (FIG. 3), and includes a left side wall 65b instead of the left side wall 65 (FIG. 3). An air supply pipe 57a is connected to the right side wall 64b in the same manner as the right side wall 64, and a carrier airflow M2 including a material is supplied into the drum portion 61 from the air supply pipe 57a. The right side wall 64b has a material supply port 64a that opens to a position corresponding to the inside of the drum portion 61 and into which the conveying airflow M2 flows.

  An air supply pipe 57b is connected to the left side wall 65b in the same manner as the left side wall 65, and the carrier airflow M3 is supplied from the air supply pipe 57b to the inside of the drum portion 61. The left side wall 65b has a material supply port 65a that opens to a position corresponding to the inside of the drum portion 61 and into which the conveying airflow M3 flows.

  In addition, an air supply port 521a to which air containing no material is supplied is formed on the right side wall 64b. The air supply port 521a is an opening that supplies air supplied from an air supply pipe 522a connected to the right side wall 64b to the inside of the drum portion 61. The air supply port 521 a extends in the direction of the rotation axis Q (FIG. 4) of the drum portion 61, passes through the right side wall 64 b, and opens at a position overlapping the inside of the drum portion 61. In the radial direction of the drum portion 61, the air supply port 521a opens at a position different from the material supply port 64a.

  Similarly, an air supply port 521b to which air containing no material is supplied is formed in the left side wall 65b. The air supply port 521 b is an opening that supplies air supplied from an air supply pipe 522 b connected to the left side wall 65 b to the inside of the drum portion 61. The air supply port 521 b passes through the left side wall 65 b in the direction of the rotation axis Q of the drum portion 61 and opens at a position overlapping the inside of the drum portion 61. In the radial direction of the drum portion 61, the air supply port 521b opens at a position different from the material supply port 65a.

  The air supply pipe 522a is connected to an air supply device 523a that operates under the control of the control device 110. The air supply pipe 522b is connected to an air supply device 523b that operates under the control of the control device 110. The air supply devices 523a and 523b are devices that have a blower (not shown) or the like and send air to the air supply tubes 522a and 522b, respectively. The air supply devices 523a and 523b may supply, for example, humidified air humidified by the humidifying unit 208 (FIG. 1) or the like to the air supply pipes 522a and 522b. Alternatively, air inside the sheet manufacturing apparatus 102 (outside air) such as around the accumulation unit 60a may be supplied to the supply pipes 522a and 522b. In any of these cases, the air that does not include the material supplied to the drum unit 61 by the air supply devices 523a and 523b is referred to as outside air.

  The air supply devices 523a and 523b supply the outside air with an air volume corresponding to the difference between the air volume flowing into the drum portion 61 from the material supply ports 64a and 65a and the air volume sucked by the suction mechanism 76. The outside air supplied through the supply pipes 522a and 522b corresponds to the outside air O1 and O2 (FIG. 3).

  The air supply devices 523a and 523b correspond to the intake air adjustment unit 342 (FIG. 8). The controller 150 can adjust the air volume of the outside air supplied from the air supply devices 523a and 523b to the air supply pipes 522a and 522b by the basis weight adjustment control unit 157. The control of the air supply devices 523a and 523b by the basis weight adjustment control unit 157 is the same as the control of the intake air restriction units 511 and 512 shown in FIGS. The basis weight adjustment control unit 157 controls the air supply amount of the air supply device 523a and the air supply amount of the air supply device 523b, so that the outside air flowing into the drum portion 61 from the air supply port 521a on the right side R side. And the left-right balance with the outside air flowing in from the air supply port 521b on the left direction L side can be changed. As described above, the basis weight adjustment control unit 157 controls the air supply devices 523a and 523b to obtain the same effect as in the control for adjusting the opening areas of the intake ports 501 and 502 in the first embodiment. Can do. As described above, according to the sheet manufacturing apparatus 102 of the third embodiment, by controlling the air supply devices 523a and 523b, the distribution of the material inside the drum unit 61 is controlled, and the predetermined direction intersecting the conveyance direction F The basis weight distribution of the sheet S in (for example, the width direction WD) can be adjusted.

  The air supply devices 523a and 523b can be configured as one air supply device. In this case, a mechanism for changing and adjusting the air supply amount (air flow) sent from the air supply device to the air supply tube 522a and the air supply amount (air flow) sent from the air supply device to the air supply tube 522b. It is preferable to provide. For example, the structure which provided the branch part which branches the airflow which an air supply apparatus supplies into the air supply pipe | tube 522a and the air supply pipe | tube 522b is assumed. A damper (not shown) that adjusts the ratio of dividing the airflow into the supply pipe 522a and the supply pipe 522b can be arranged at this branch portion, and a configuration in which the position and driving state of the damper can be controlled by the control device 110 can be adopted. .

  As shown in FIG. 13, the sheet manufacturing apparatus 102 is illustrated as a configuration in which an air flow restriction unit 401 is provided in the main pipe 54 a, but instead of the air flow restriction unit 401 provided in the sheet manufacturing apparatus 102, the air flow restriction unit 411. It is also possible to provide (FIG. 12).

[Fourth Embodiment]
14A to 14E are explanatory views of the sheet manufacturing apparatus 103 according to the fourth embodiment. FIG. 14A is an exploded perspective view of a main part of the sheet manufacturing apparatus 103, and particularly shows an intake position changing unit 530 (position changing unit). FIG. 14B is a diagram illustrating a first intake position of the intake port. 14C is a diagram showing a second intake position of the intake port, FIG. 14D is a diagram showing a third intake position of the intake port, and FIG. 14E is a diagram showing a fourth intake position of the intake port.

  The sheet manufacturing apparatus 103 corresponds to a configuration in which the positions of the intake ports 501 and 502 can be changed in the sheet manufacturing apparatus 100 according to the first embodiment. Constituent elements common to the sheet manufacturing apparatus 100 are denoted by the same reference numerals and description thereof is omitted.

  14A includes an opening position changing plate 532, a driving unit 531 that rotates the opening position changing plate 532, and a wall plate 533 that is arranged so as to overlap the opening position changing plate 532. The opening position changing plate 532 and the wall plate 533 are circular plates, and are stacked so that the axial centers coincide with each other, and can be used as the right side wall 64 (FIG. 3) and the left side wall 65 (FIG. 3).

  The opening position changing plate 532 has a central opening 532 a at the center and an outer peripheral opening 532 b at a position away from the center of the opening position changing plate 532. It is desirable that the outer peripheral opening 532 b be opened at a position overlapping the cross section of the drum portion 61 when the intake position changing portion 530 is disposed as the right side wall 64 or the left side wall 65. In this case, the central opening 532a functions as the material supply port 64a or the material supply port 65a, and the outer peripheral opening 532b functions as the intake port 501 or the intake port 502.

A central opening 533 a is formed at the center of the wall plate 533. The position, shape, and size of the central opening 533a are set so as to overlap the central opening 532a in a state where the opening position changing plate 532 and the wall plate 533 are overlapped.
Outer openings 534a, 534b, 534c, and 534d are formed in the wall plate 533 at positions away from the central opening 533a. The outer peripheral openings 534 a, 534 b, 534 c, and 534 d are openings of a size that can be overlapped with the opening position changing plate 532, and are equally arranged in the circumferential direction of the wall plate 533, for example.

  The intake position changing unit 530 is configured by overlapping an opening position changing plate 532 and a wall plate 533 so that the central opening 532a and the central opening 533a coincide with each other. For this reason, the central openings 532a and 533a form one through hole, and the conveying airflows M2 and M3 are allowed to pass through as the material supply ports 64a and 65a.

  The driving unit 531 can change the angle of the opening position changing plate 532 with respect to the wall plate 533 by rotating the opening position changing plate 532. The wall plate 533 can be configured not to be rotated by the drive unit 531, but it is sufficient that the drive unit 531 can change the relative angle between the wall plate 533 and the opening position changing plate 532.

  When the opening position changing plate 532 rotates with respect to the wall plate 533, the outer peripheral opening 532b overlaps one of the outer peripheral openings 534a, 534b, 534c, and 534d depending on the rotation position. Further, the outer peripheral opening 532b may not overlap any of the outer peripheral openings 534a, 534b, 534c, and 534d. When the outer peripheral opening 532b overlaps with the outer peripheral opening 534a, the outer peripheral opening 532b and the outer peripheral opening 534a form one through hole, function as the intake port 501 or the intake port 502, and circulate outside air. The same applies to the outer peripheral openings 534b, 534c, and 534d.

  Therefore, 531 rotates the opening position changing plate 532 and changes the rotation position of the opening position changing plate 532 with respect to the wall plate 533, so that the opening into which the outside air flows into the drum portion 61 is changed to the outer peripheral openings 534 a, 534 b, 534 c, 534d can be selected. Any of the outer peripheral openings 534a, 534b, 534c, and 534d on the right side wall 64 side corresponds to the first intake port, and any of the outer peripheral openings 534a, 534b, 534c, and 534d on the left side wall 65 side corresponds to the second intake port. To do. The central opening 532a and the central opening 533a correspond to a material supply port. That is, when any outer peripheral opening that opens on the right side wall 64 corresponds to the first intake port, any outer peripheral opening that opens on the left side wall 65 side corresponds to the second intake port. The right side wall 64 side and the left side wall 65 side may be reversed.

  The first intake position shown in FIG. 14B shows a state where the outer peripheral opening 532b overlaps the outer peripheral opening 534a. Since the outer peripheral opening 534a is located above the central opening 533a, outside air flows into the drum portion 61 from above the material supply ports 64a and 65a at the first intake position.

  The second intake position shown in FIG. 14C shows a state where the outer peripheral opening 532b overlaps the outer peripheral opening 534b. The outer peripheral opening 534 b is at the same height as the central opening 533 a and is located downstream in the transport direction F. At the second intake position, outside air flows into the drum portion 61 from the downstream side at the same height as the material supply ports 64a and 65a.

  The third intake position shown in FIG. 14D shows a state where the outer peripheral opening 532b overlaps the outer peripheral opening 534c. The outer peripheral opening 534c is located below the central opening 533a. At the third intake position, outside air flows into the drum portion 61 from below the material supply ports 64a and 65a.

  The fourth intake position shown in FIG. 14E shows a state where the outer peripheral opening 532b overlaps the outer peripheral opening 534d. The outer peripheral opening 534d is at the same height as the central opening 533a and is located upstream in the transport direction F. At the fourth intake position, outside air flows into the drum portion 61 from the upstream side at the same height as the material supply ports 64a and 65a.

  In this way, the position where the outside air flows into the drum unit 61 can be changed by causing the control unit 110 to operate the drive unit 531 and rotate the opening position changing plate 532. In this configuration, the intake position changing unit 530 corresponds to the intake adjustment unit 342.

  The sheet manufacturing apparatus 103 according to the fourth embodiment includes an intake position changing unit 530 as a position changing unit that changes the position of an intake port for supplying air that does not contain material to the drum unit 61 from the outside of the housing unit 63. . Thereby, the distribution of the airflow flowing out from the drum portion 61 can be changed by changing the distribution of the airflow flowing into the drum portion 61. For this reason, the distribution of the basis weight of the manufactured sheet S can be controlled by changing the distribution of the material deposited through the opening 61 a of the drum portion 61.

  In addition, at the first, second, third and fourth intake positions, the outer peripheral opening 532b is completely overlapped with any of the outer peripheral openings 534a, 534b, 534c and 534d, and the opening area is maximized. . The control of the sheet manufacturing apparatus 103 is not limited to this. For example, the outer peripheral opening 532b may be partially overlapped with any of the outer peripheral openings 534a, 534b, 534c, and 534d. In this case, ventilation resistance can be given to the inflow of outside air. For example, the balance of the intake amount of the outside air on the right direction R side and the left direction L side of the drum portion 61 can be changed.

  FIG. 15 is a chart showing the basis weight distribution of the sheet S manufactured by the sheet manufacturing apparatus 103, and shows an example of the basis weight distribution of the sheet S when the driving conditions of the sheet manufacturing apparatus 103 are changed. More specifically, FIG. 15 summarizes the results of controlling the basis weight distribution of the sheet S in the sheet manufacturing apparatus 103 in a chart. FIG. 15 shows the results of Examples 1 to 7 to which the present invention is applied and a comparative example for comparison.

  In Examples 1 to 7 and the comparative example, as the driving conditions of the sheet manufacturing apparatus 103, the feed control, the conveyance air flow rate ratio with respect to the suction air flow rate, the left and right intake ratio, and the intake position are set. The feed control refers to control for restricting the flow of the transport airflow M1 by the airflow restriction unit 401, control for restricting the airflow on the right direction R side, control for restricting the airflow on the left direction L side, and no restriction. Switched control. The ratio of the conveyance air flow rate to the suction air flow rate is a control with respect to the ratio of the conveyance air flow M1 and the suction air flow M4 supplied to the drum unit 61. The amount in the operation state of the normal sheet manufacturing apparatuses 100 to 103 is set to “Large”. The state in which the ratio was decreased by controlling the blower 56 was defined as “small”. The left / right intake ratio refers to the balance of the inflow amount (intake amount) of the outside air flowing into the drum unit 61, and controls the intake amount on the left direction L side = the intake amount on the right direction R side, the intake amount on the left direction L side. The control for switching the intake air amount to the right direction R side and the control for decreasing the intake amount on the left direction L side to the right direction R side are switched. The intake positions 1 to 4 are the intake positions shown in FIGS. 14B to 14E, respectively.

  FIG. 15 shows a basis weight distribution in the width direction WD of the sheet S as a result corresponding to each driving condition. The basis weight distribution of the sheet S is indicated by a plot (◯) in which the vertical axis indicates the basis weight and the horizontal direction indicates the width direction WD, and the left and right directions in the width direction WD are as indicated by reference characters R and L.

  The first embodiment shows an example in which the second air intake position is set with the left and right intake ratios set to the left direction L = the right direction R without performing the supply control and reducing the ratio of the air flow rate to the conveyance air flow rate. When the sheet manufacturing apparatus 103 operated in Example 1, as shown in FIG. 15, a sheet S having a basis weight distribution in which the basis weight at the center in the width direction WD is larger than the basis weight at the end was obtained.

  The second embodiment shows an example in which the third air intake position is set with the feed air flow rate ratio to normal (large), the left and right intake air ratio set to the left direction L = the right direction R without supplying control. . When the sheet manufacturing apparatus 103 operated in Example 2, as shown in FIG. 15, a sheet S having a basis weight distribution in which the basis weight at the center in the width direction WD is larger than the basis weight at the end was obtained.

  The third embodiment shows an example in which the first air intake position is set with the feed air flow rate ratio to normal (large), the left and right intake air ratio set to the left direction L = the right direction R without supply control. . When the sheet manufacturing apparatus 103 operated in Example 3, as shown in FIG. 15, a sheet S having a basis weight distribution in which the basis weight at the center in the width direction WD is smaller than the basis weight at the end was obtained. In comparison with Example 2, different basis weight distributions were obtained depending on the difference in intake position.

In Example 4, the airflow restriction plate 402 was extended by the airflow restriction part 401 to the right direction R side in the cross section of the main pipe 54a. Regarding the other driving conditions, the ratio of the carrier air flow to the suction air flow was normal (large), the left and right intake ratio was left direction L = right direction R, and the second intake position was set.
In the fifth embodiment, the air flow restricting portion 401 projects the air flow restricting plate 402 to the left direction L side in the cross section of the main pipe 54a. Regarding the other driving conditions, the ratio of the carrier air flow to the suction air flow was normal (large), the left and right intake ratio was left direction L = right direction R, and the second intake position was set.
Since the driving conditions are the same in the fourth and fifth embodiments except for the state of restriction in the airflow restriction unit 401, the basis weight distribution of the sheet S reflects the difference in control in the airflow restriction unit 401. In Example 4, the distribution is such that the end on the left direction L side has a larger basis weight than the end on the right direction R side. In contrast, in Example 5, the end on the right direction R side is on the left direction L side. A distribution in which the basis weight was larger than that at the end portion was obtained.

In Example 6, the material supply control was not performed, and the ratio of the conveyance air flow rate to the suction air flow rate was set to normal (large). The left and right intake ratio was controlled so that the intake amount in the left direction L was greater than that in the right direction R, and the second intake position was set.
In Example 7, the feed control was not performed, and the ratio of the conveying air flow to the suction air flow was normal (large). The left and right intake ratio was controlled such that the intake amount in the left direction L was smaller than that in the right direction R, and the second intake position was set.
Since the driving conditions are the same in the sixth and seventh embodiments except for the left-right balance of the intake air amount, the basis weight distribution of the seat S reflects the difference in the left-right balance of the intake air amount. In Example 6, a distribution in which the end on the right direction R side has a larger basis weight than the end on the left direction L side is obtained, and in contrast, in Example 7, the end on the left direction L side is on the right direction R side. A distribution in which the basis weight was larger than that at the end portion was obtained.

Further, in the comparative example, the material supply control is not performed, the ratio of the conveyance airflow volume to the suction airflow volume is normal (large), and the left and right intake ratio is not controlled, and the second intake position is set. In the comparative example, the basis weight distribution of the sheet S was substantially constant in the width direction WD.
Although not shown, the fourth intake position yielded the same results as when the second intake position was adopted.

  According to each embodiment of FIG. 15, from the comparison with the comparative example, the control of the air flow by the air flow restriction unit 401, the ratio of the carrier air flow rate to the suction air flow rate, the change of the intake port position by the intake position change unit 530, the outside air It is apparent that the basis weight distribution in the width direction WD of the sheet S can be changed by controlling any of the left and right intake ratios.

  The same control can be performed for the feed control even in the configuration using the air flow restriction unit 411 described in the second embodiment. The left / right intake ratio can also be changed in the configurations of the first to third embodiments. Therefore, according to the sheet manufacturing apparatuses 100, 101, 102, 103 described in the first to fourth embodiments, the basis weight distribution in the width direction WD of the sheet S is controlled by the control unit 150 controlling the driving conditions of the apparatus. Can be controlled. Therefore, the sheet S having a desired basis weight distribution can be manufactured.

  The above embodiment is merely a specific mode for carrying out the present invention described in the claims, and does not limit the present invention. All the configurations described in the above embodiment are essential to the present invention. It is not limited that it is a configuration requirement. Moreover, this invention is not limited to the structure of the said embodiment, In the range which does not deviate from the summary, it can be implemented in a various aspect.

  For example, in the above-described embodiment, the basis weight sensor 309 is disposed between the sheet forming unit 80 and the cutting unit 90 to detect the basis weight of the sheet S, but the present invention is not limited to this. The basis weight sensor 309 may be disposed downstream of the cutting unit 90, and the cut sheet S may be detected by the basis weight sensor 309. Further, the basis weight sensor 309 may be installed on the upstream side of the sheet forming unit 80 to detect the basis weight of the second web W2.

  The sheet manufacturing apparatus 100 is not limited to the sheet S, and may be configured to manufacture a board-shaped or web-shaped product including a hard sheet or a stacked sheet. Further, the sheet S may be paper made of pulp or waste paper, or may be a non-woven fabric containing natural fibers or synthetic resin fibers. The properties of the sheet S are not particularly limited, and may be paper that can be used as recording paper for writing or printing (for example, so-called PPC paper), wallpaper, wrapping paper, colored paper, drawing paper, Kent paper. Etc. When the sheet S is a non-woven fabric, it may be a general non-woven fabric, a fiber board, tissue paper, kitchen paper, cleaner, filter, liquid absorbent material, sound absorber, cushioning material, mat, or the like.

DESCRIPTION OF SYMBOLS 10 ... Supply part, 12 ... Roughing part, 14 ... Roughing blade, 20 ... Defibration part, 22 ... Introduction port, 24 ... Discharge port, 26 ... Defibration part blower, 27 ... Dust collection part, 28 ... Collection Blower 40 ... sorting part 41 ... drum part 42 ... inlet port 43 ... housing part 44 ... discharge port 45 ... first web forming part 46 ... mesh belt 47 ... roller 48 ... suction part 49 Rotating body 50 ... Mixing unit 52 ... Additive supply unit 52a ... Discharge unit 54 ... Pipe (material supply pipe) 54a ... Main pipe (first supply pipe) 54b ... Branch part 54c ... Branch pipe ( (Second supply pipe), 54d ... branch pipe (third supply pipe), 56 ... mixing blower, 57a, 57b ... air supply pipe, 60 ... deposition part, 61 ... drum part (sieving part), 61a ... opening, 62 ... introduction 63, housing part, 63a, opening, 64, right side wall, 64a, material supply port, 6 b ... right side wall, 65 ... left side wall, 65a ... material supply port, 65b ... left side wall, 66 ... opposing wall part, 68 ... concave part, 69a ... pile seal, 69b ... pile seal, 70 ... second web forming part (web Forming part), 72 ... mesh belt, 72a ... deposition surface, 74 ... roller, 76 ... suction mechanism (suction part), 77 ... suction blower, 79 ... conveying part, 79a ... mesh belt, 79b ... stretching roller, 79c ... Suction mechanism, 80 ... sheet forming section, 82 ... pressurizing section, 84 ... heating section, 90 ... cutting section, 96 ... discharge section, 100, 101, 102, 103 ... sheet manufacturing apparatus, 110 ... control apparatus, 111 ... main Processor: 114 ... Sensor I / F, 115 ... Drive unit I / F, 120 ... Nonvolatile storage unit, 123 ... Basis weight setting data, 140 ... Storage unit, 150 ... Control unit 151 ... Operating system, 153 ... Operation detection unit (accepting unit), 154 ... Detection control unit, 155 ... Drive control unit, 157 ... Basis weight adjustment control unit, 160 ... Display unit, 202, 204, 206, 208, 210, 212 ... Humidifying section, 341 ... Basis weight adjusting section, 342 ... Intake adjusting section, A1 ... Humidified air, DF ... Downflow, M1, M2, M3 ... Conveying airflow, M4 ... Suction airflow, Conveying direction, 501, 502 ... Intake Mouth (first intake port, second intake port), 511, 512... Intake restriction portion (second adjustment portion), 511a, 512a... Restriction plate, 511b, 512b... Plate drive portion, 521a, 521b. Material supply port), 522a, 522b ... air supply pipe, 523a, 523b ... air supply device (second adjustment unit), 530 ... intake position change unit (position change unit), 531 ... drive unit, 532 ... opening position change Additional plate, 532a ... Central opening (material supply port), 532b ... Opening position changing plate, 532b ... Outer opening, 533 ... Wall plate, 533a ... Central opening (material supply port), 534a, 534b, 534c, 534d ... Outer opening (First intake port, second intake port), O1, O2 ... outside air, Q ... rotation shaft, S ... sheet, W1 ... first web, W2 ... second web (web).

Claims (13)

A sieve portion having a plurality of openings;
A web-forming part having a deposition surface on which a material containing fibers passing through the openings is deposited, and forming a web on the deposition surface;
A sheet forming section for processing the web to form a sheet;
A control unit that controls the basis weight of the web deposited on the deposition surface in a direction intersecting the web conveyance direction;
A sheet manufacturing apparatus comprising: The sieve part includes a rotatable drum part,
A material supply pipe for supplying a carrier airflow containing the material to the inside of the drum unit is provided,
The material supply pipe is
A first supply pipe;
A second supply pipe branched from the first supply pipe at a branch portion and connected to one end of the drum portion in the rotation axis direction;
A third supply pipe branched from the first supply pipe at the branch portion and connected to the other end of the drum portion in the rotation axis direction;
The amount of material transported by the transport airflow flowing through the second supply pipe and the amount of material transported by the transport airflow flowing through the third supply pipe are provided in the vicinity of the branch portion and controlled by the control unit A first adjustment unit for changing the ratio of
The sheet manufacturing apparatus according to claim 1. The sieve part is
A rotatable drum section;
A housing portion covering at least a portion of the drum portion where the opening is formed;
A material supply port for supplying a carrier airflow containing the material into the drum portion;
First and second air inlets for supplying air that does not contain the material from the outside of the housing part to the inside of the drum part, the first air inlets being provided apart from each other in the rotation axis direction of the drum part 1 and the second intake port;
A second adjustment unit that changes a ratio of a flow rate of air supplied from the first and second intake ports under the control of the control unit;
The sheet manufacturing apparatus according to claim 1 or 2. The sieve part is
A rotatable drum section;
A housing portion covering at least a portion of the drum portion where the opening is formed;
A material supply port for supplying a carrier airflow containing the material into the drum portion;
First and second air inlets for supplying air that does not contain the material from the outside of the housing part to the inside of the drum part, the first air inlets being provided apart from each other in the rotation axis direction of the drum part 1 and the second intake port;
A position changing unit that changes the position of the first intake port with respect to the material supply port and the position of the second intake port with respect to the material supply port by the control of the control unit;
The sheet manufacturing apparatus according to any one of claims 1 to 3, wherein   The sheet manufacturing apparatus according to any one of claims 1 to 4, wherein the control unit controls a flow rate of the transport airflow. A suction part for sucking the material onto the deposition surface by a suction airflow;
The sheet manufacturing apparatus according to claim 1, wherein the control unit controls a flow rate of the suction airflow. A web forming portion for forming a web by depositing a material containing fibers on a deposition surface;
A sheet forming section for processing the web to form a sheet;
A reception unit that receives a setting of a basis weight distribution of the sheet;
Based on the basis weight distribution received by the reception unit, a control unit that controls the basis weight of the web to be deposited on the deposition surface of the web forming unit;
A sheet manufacturing apparatus comprising: Having a sieve portion in which a plurality of openings are formed;
The material that has passed through the opening of the sieve portion is configured to be deposited on the deposition surface,
The accepting unit accepts a basis weight distribution in a predetermined direction that intersects a conveyance direction of the web as a basis weight distribution of the sheet;
The sheet manufacturing apparatus according to claim 7. A detection unit for detecting the thickness or basis weight of the web or the sheet;
The control unit controls the basis weight distribution of the web in a predetermined direction that intersects the conveyance direction of the web based on the detection result of the detection unit;
The sheet manufacturing apparatus according to claim 7 or 8, characterized in that: A sheet that is nipped and conveyed by a pair of conveyance rollers,
A difference is provided in the distribution of the basis weight in the predetermined direction intersecting the transport direction, and the basis weight of the central portion is larger than the end portion in the predetermined direction,
A sheet characterized by.   The sheet according to claim 10, wherein the thickness of the end portion in the predetermined direction is equal to the thickness of the central portion.   A sheet manufactured by the sheet manufacturing apparatus according to claim 1. A first step of depositing a fiber-containing material on a deposition surface to form a web; a second step of conveying the web; and a third step of processing the conveyed web to form a sheet. ,
In the first step, a difference in basis weight distribution in a predetermined direction intersecting the web conveyance direction is caused, and the basis weight of the central portion is made larger than an end portion in the predetermined direction.
A sheet manufacturing method characterized by the above.

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