JP2018164955A - Cutting device and film manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device and a film manufacturing method which are provided in an equipment having an explosion-proof structure, prevent an increase in size of the equipment, and efficiently cut an object to be cut. A cutting device 14 is provided in a solution film forming facility 10 as an facility having an explosion-proof structure. The solution film forming equipment 10 manufactures the film 11 while transporting the film 11, and the cutting device 14 continuously cuts the long film 11 being transported in the longitudinal direction. The cutting device 14 includes a cutting blade 70 and an intermittent rotation mechanism 71. The cutting blade 70 is rotatably provided at a fixed position in the width direction of the transport path of the film 11, and the cutting edge portion 70a is formed on the peripheral edge along the rotation direction. The intermittent rotation mechanism 71 intermittently rotates the cutting blade 70 to change the cutting position of the cutting edge portion 70a for cutting the film 11. [Selection diagram] Fig. 3

Description

  The present invention relates to a cutting device and a film manufacturing method.

  In a solution casting apparatus for producing a polymer film by a solution casting method, for example, by continuously cutting each side end of a long film being transported so as to have a target product width. Remove. There is also a cutting device that cuts the film by moving a fixed cutting blade in the width direction of the conveyed long film (for example, see Patent Document 1).

  Patent Document 1 describes that the cutting position for cutting the film at this round blade is changed by rotating the round blade as a cutting blade at a predetermined timing other than at the time of cutting. The cutting timing is changed when the cutting edge is determined to be worn, for example, based on the analysis result of the image acquired by imaging the cutting edge of the round blade. At the change timing, the round blade is automatically released from the fixed state, rotated by a predetermined angle, and fixed again. Patent Document 1 also describes a configuration that notifies the change timing and allows the operator to change the cutting position manually.

JP 2010-30035 A

  By the way, in the solution casting apparatus, a flammable or highly ignitable compound may be used, and the necessity for an explosion-proof structure is high. For this reason, in the cutting apparatus described in Patent Document 1, when the cutting blade is automatically moved or rotated by a driving unit such as a motor, the driving unit is out of the explosion-proof structure from the viewpoint of safety. Because it is necessary to install, the size of the equipment is increased.

  Furthermore, when it is set as the structure which can change the cutting position of a cutting blade manually in the cutting device described in patent document 1, dispersion | variation may arise in the rotation amount of a cutting blade. When variation occurs in the rotation amount of the cutting blade, replacement work of the cutting blade itself may be frequently performed. When replacing the cutting blade itself, the explosion-proof structure is stopped, thereby impairing the efficiency of cutting the object to be cut. In particular, when the long film being conveyed is continuously cut in the longitudinal direction using the technique described in Patent Document 1 for cutting the film in the width direction, the stress is continuously applied to the cutting blade for a long time. Therefore, the frequency at which the cutting position is changed and the cutting blade itself is replaced is higher.

  Accordingly, an object of the present invention is to provide a cutting device and a film manufacturing method that are provided in an explosion-proof structure facility, prevent an increase in size of the facility, and efficiently cut an object to be cut.

  The cutting device of the present invention includes a cutting blade and an intermittent rotation mechanism in a cutting device that continuously cuts a long cutting object being conveyed in the longitudinal direction. The cutting blade is rotatably provided at a fixed position in the width direction of the conveyance path of the object to be cut, and a blade edge portion is formed on the periphery along the rotation direction. The intermittent rotation mechanism rotates the cutting blade intermittently, and changes the cutting position of the blade edge portion that cuts the cutting object.

  It is preferable to provide a grooved roller that supports the object to be cut on the circumferential surface, and has a groove extending in the circumferential direction on the circumferential surface, and the groove is arranged to face the cutting edge. The groove is preferably not in contact with the blade edge portion.

  The intermittent rotation mechanism preferably rotates the cutting blade in the conveyance direction of the object to be cut.

  It is preferable to provide a removal unit that removes chips of the cutting object generated by cutting the cutting blade.

  The removing unit preferably has a suction unit that sucks the chips adhering to the cutting blade.

  It is preferable that the removing unit has a blowing unit that blows air to the cutting blade.

  It is preferable to include a rotation amount detection unit, a determination unit, and a warning unit. The rotation amount detection unit detects the rotation amount of the cutting blade. The determination unit determines whether it is time to replace the cutting blade based on the rotation amount. The warning unit issues a warning to that effect when the determination unit determines that it is time to replace.

  The cutting blade is preferably a round blade. The diameter of the cutting blade is in the range of 50 mm or more and 300 mm or less, and the cutting amount, which is the difference between the radius of the cutting blade and the shortest distance from the center of the cutting blade to the object to be cut, is in the range of 5 mm or more and 20 mm or less. It is preferable that

  It is preferable to include an air cylinder and a power transmission member. The air cylinder has a fixed main body and a rod that reciprocates when air is supplied to the main body. The power transmission member converts the reciprocating motion of the rod into a rotational motion and transmits power to the intermittent rotation mechanism.

  The film manufacturing method of the present invention includes a step of continuously conveying a long film in the longitudinal direction of the film, and a peripheral edge along the rotational direction that is rotatably provided at a fixed position in the width direction of the film conveyance path. And a step of cutting the film by a cutting blade having a blade edge portion formed thereon, and a step of intermittently rotating the cutting blade to change the cutting position of the blade edge portion for cutting the film.

  ADVANTAGE OF THE INVENTION According to this invention, the enlargement of the installation of an explosion-proof structure can be prevented, and a cutting target object can be cut | disconnected efficiently.

It is the schematic of the solution casting apparatus which implemented this invention. It is a top view which shows the outline | summary of a cutting device. It is a side view containing the partial cross section of a cutting device.

  In FIG. 1, a cutting device 14 is provided in a solution casting apparatus 10 that continuously manufactures a long optical film (hereinafter simply referred to as “film”) 11. For cutting in the direction. The thickness of the film 11 to be manufactured is 20 μm in the present embodiment, but the thickness is not particularly limited, and is in the range of 10 μm to 200 μm.

  The solution casting apparatus 10 includes a casting device 12, a clip tenter 13, a cutting device 14, a drying chamber 15, a cooling chamber 16, and a winding chamber 17 in this order from the upstream side. In addition, in this example, although the film 11 used as a protective film of the polarizing plate of a liquid crystal display is manufactured, it is not restricted to this, For example, the film used as a phase difference film which has a protective function of a polarizing plate, or a low moisture-permeable film Can be manufactured.

  The casting device 12, the clip tenter 13, and the cutting device 14 are provided in an explosion-proof structure 40 having an explosion-proof structure in order to prevent an accident due to an explosion. The explosion-proof structure 40 is configured to maintain the inside of the hermetic chamber in an explosion-proof atmosphere by, for example, nitrogen gas generated by a nitrogen gas generator (not shown) disposed in the hermetic chamber. Thus, the solution casting apparatus 10 is an explosion-proof structure.

  The casting apparatus 12 is for forming a film 11 containing a solvent from a dope 18 which is a polymer solution in which a polymer is dissolved in a solvent. In this example, the polymer of the dope 18 is cellulose triacetate (hereinafter referred to as TAC), and the solvent is a mixture of dichloromethane and methanol. However, the polymer of the dope 18 and the solvent are not limited to this. Other examples of the polymer include cellulose acylate different from TAC, polymethyl methacrylate (PMMA), and the like. Examples of cellulose acylate different from TAC include cellulose diacetate and cellulose acetate propionate. Other examples of the solvent include methanol, butanol, acetone, chloroform, and the like. These substances may be used alone or in combination, depending on the type of polymer used. Can be decided.

  The casting apparatus 12 includes a die 19, a wind shielding member 20, a casting belt 22, rotating rollers 23 and 24, a peeling roller 25 for peeling the casting film 33 from the casting belt 22, and the like.

  The die 19 forms the flow of the dope 18 in the form of a film while guiding the supplied dope 18 inside, and flows out from the outlet 19a. The outlet 19a is formed in a slit shape extending in the depth direction of FIG. The casting belt 22 supports the dope 18 flowing out from the die 19 and forms a casting film 33.

  A casting belt 22 as a support formed in an annular shape is stretched around the rotating rollers 23 and 24. The longitudinal direction of the outlet 19 a coincides with the width direction of the casting belt 22. The rotating rollers 23 and 24 have rotating shafts 23a and 24a, and the rotating shafts 23a and 24a rotate in the circumferential direction by being rotated by a driving device (not shown). With this rotation, the casting belt 22 continuously runs in the longitudinal direction. The die 19 is provided on the rotating roller 23 in the present embodiment, but may be provided on the casting belt 22 from the rotating roller 23 toward the rotating roller 24. As the dope 18 continuously flows out of the die 19 toward the traveling belt 22 that travels, a casting film 33 is formed on the casting belt 22. The dope 18 flowing out from the outlet 19a of the die 19 forms a film-like bead over the casting belt 22. In this example, the casting belt 22 is used as a support that is stretched around the rotation rollers 23 and 24 and travels by the rotation of the rotation rollers 23 and 24. However, the present invention is not limited to this, and a casting drum (not shown) is used. May be used.

  The casting belt 22 has a running speed in the range of 25 m / min to 80 m / min, and thus the production speed of the film 11 is in the range of 25 m / min to 80 m / min. In this embodiment, the running speed of the casting belt 22 and the production speed of the film 11 are set to 60 m / min.

  The wind shield member 20 is for blocking the accompanying wind flowing along with the running of the casting belt 22. The accompanying air causes uneven thickness in the longitudinal direction of the film, that is, nonuniform thickness. The wind shielding member 20 is arranged upstream of the die 19 in the traveling direction, and has a structure that partitions the space upstream of the die 19 and in the vicinity of the casting belt 22 from the external space. The wind shield member 20 may be a wind shield box having a hollow box shape, but in this example, it is a wind block having a solid block shape. When the wind shield member 20 is a wind shield box, a suction mechanism (not shown) is connected to the wind shield box, and the gas inside the wind shield box is sucked by this suction mechanism. The wind shield member 20 faces the die 19 with a gap. The gap interval is 1.0 mm in this embodiment. With this wind shield member 20, the film 11 in which the uneven thickness due to the accompanying wind is suppressed can be obtained.

  The stripping roller 25 is arranged with its rotation axis parallel to the rotation axis of the rotation roller 23. In this example, the peeling roller 25 is disposed on the side opposite to the casting belt 22 with respect to the conveyance path of the film 11, and the film 11 is wound around the circumferential surface. The stripping roller 25 rotates following the conveyance of the film 11. With the film 11 wound around the stripping roller 25, the film 11 is pulled toward the downstream side of the solution casting equipment 10, whereby the casting film 33 is peeled off from the casting belt 22 at a predetermined stripping position. Note that the peeling roller 25 may be rotated in synchronization with the conveyance of the film 11 by a motor.

  In addition, the casting apparatus 12 may have a temperature controller and a blower. The temperature controller sets the temperature of the belt surface of the casting belt 22 that supports the casting film 33 to a predetermined value. The blower advances the drying of the casting film 33 by sending the drying air toward the casting film 33 or by supplying the drying air onto the casting film 33 in the traveling direction.

  A plurality of rollers 28 are arranged on the conveyance path from the casting device 12 to the clip tenter 13, and these rollers 28 guide the film 11 to the clip tenter 13. A blower (not shown) may be provided in the vicinity of the conveyance path of the film 11 set by the plurality of rollers 28. This blower applies air to the film 11 in a state containing a solvent to further promote the drying of the film 11.

  The clip tenter 13 is a stretching device that stretches the film 11 in the width direction, and includes a plurality of clips 29 as holding members that hold the side end portions 11 a of the film 11. Note that the holding member may be a pin plate having a plurality of pins on a table. The plurality of clips 29 are attached to a chain (not shown) formed in an annular shape at a predetermined interval. The chain is movably attached along a rail (not shown), and the clip 29 circulates along the rail as the chain moves. The clip 29 starts holding the guided film 11 in the vicinity of the inlet of the clip tenter 13, moves toward the outlet, and releases the holding in the vicinity of the outlet. The clip 29 released from the holding moves again to the vicinity of the entrance and holds the newly guided film 11. The clip tenter 13 extends in the width direction while transporting the film 11 in the longitudinal direction by moving the clip 29 in the longitudinal direction and the width direction of the film 11. The clip tenter 13 is provided with a blowing device 30, and drying air is sent from the blowing device 30 to the film 11 being conveyed.

  A seal roller 39 is disposed at the outlet of the clip tenter 13. The seal roller 39 blocks and narrows a part of the outlet of the clip tenter 13, thereby suppressing the passage of wind at the outlet of the clip tenter 13. As a result, fluttering of the film 11 coming out from the clip tenter 13 is suppressed.

  A cutting device 14 is provided downstream of the clip tenter 13. The cutting device 14 includes a plurality of support rollers 50a to 50d, a cutting unit 52, a grooved roller 54, a collection roller 56, and the like. The film 11 exiting the clip tenter 13 is supported by a plurality of support rollers 50a to 50d, and the side end 11a is cut by passing between the cutting unit 52 and the grooved roller 54. The cut side end portion 11a is sent to the crusher 32 by the collection roller 56, is crushed by the crusher 32, and is reused as a raw material such as a dope. Details of the cutting device 14 will be described later with reference to another drawing.

  A roller 28 is also provided between the explosion-proof structure 40 and the drying chamber 15, and this roller 28 is a drive roller. Thereby, the film 11 is conveyed from the cutting device 14 to the drying chamber 15.

  The drying chamber 15 is for further drying while conveying the film 11. A large number of rollers 34 are provided in the drying chamber 15, and the film 11 is conveyed while being wound around each of the rollers 34. The temperature and humidity of the atmosphere in the drying chamber 15 are adjusted by an air conditioner (not shown).

  The cooling chamber 16 is provided downstream of the drying chamber 15 and is for cooling the film 11 to, for example, room temperature. In the cooling chamber 16, the temperature and humidity of the atmosphere are adjusted by an air conditioner (not shown).

  In the present embodiment, a knurling roller 35 is provided downstream of the cooling chamber 16. The knurling roller 35 applies knurling composed of a large number of irregularities to both end portions of the film 11. The winding chamber 17 includes a winding machine 36, and the winding machine 36 has a press roller 38. A winding core 37 for winding the film 11 is set in the winding machine 36, and the winding core 37 is rotated in the circumferential direction by a drive unit (not shown) to hold the film 11 on the winding core 37 while being pressed by the press roller 38. Wind up.

  As shown in FIG. 2, the cutting device 14 continuously cuts the film 11 with a line SL (hereinafter referred to as a slit line) SL to be cut. In the present embodiment, a pair of cutting units 52 are provided on both sides of the transport path of the film 11 so as to remove both end portions of the film 11. The width direction of the film 11 is a direction orthogonal to the conveyance direction X of the long film 11. The cutting unit 52 and the grooved roller 54 may be displaced in the normal direction of the film surface of the film 11 and the width direction of the film 11 by a shift unit (not shown).

  As shown in FIG. 3, the cutting device 14 includes a support unit 50 a to 50 d, a cutting unit 52, a grooved roller 54, a collecting roller 56, a control unit 60, a removing unit 62, and a warning unit 64. In the present embodiment, the support rollers 50a to 50d, the cutting unit 52, the grooved roller 54, the collection roller 56, and the removal unit 62 are accommodated in the chamber 14a, and the control unit 60 and the warning unit 64 are outside the explosion-proof structure 40. Arranged. The cutting device 14 continuously cuts the long film 11 being conveyed in the longitudinal direction.

  The film 11 is wound around the support rollers 50a to 50d and conveyed in the chamber 14a. The cutting unit 52 is disposed between the support roller 50 b and the support roller 50 c and includes a cutting blade 70 and an intermittent rotation mechanism 71.

  The cutting blade 70 is for cutting the film 11 with the cutting edge part 70a, and is a round blade in this example. The intermittent rotation mechanism 71 is for intermittently rotating the cutting blade 70 in the circumferential direction, thereby changing the cutting position P of the blade edge portion 70 a that cuts the film 11.

  The cutting blade 70 is provided on one film surface side of the film 11. The cutting blade 70 is rotatably provided on the rotation shaft 71 a of the intermittent rotation mechanism 71 at a fixed position in the width direction of the transport path of the film 11. The cutting blade 70 in this example is a round blade, and a blade edge portion 70a is formed on the periphery along the rotation direction. The cutting blade 70 is hollow inside, and an intermittent rotation mechanism 71 is disposed inside the cutting blade 70.

  The intermittent rotation mechanism 71 includes a rotation shaft 71a, a disk 71b, and an annular body 71c formed in an annular shape. The disk 71b is rotatably provided on the rotating shaft 71a, and a claw 72 is provided on the outer periphery so as to be swingable. The claw 72 is urged outward by a spring or the like. It is sufficient that at least one claw 72 is provided, and in this example, there are four claws 72. The annular body 71c is disposed between the cutting blade 70 and the disk 71b, and is detachably fixed to the cutting blade 70. At the time of replacement of the cutting blade 70, the cutting blade 70 is removed from the annular body 71c, and another cutting blade is attached and fixed to the annular body 71c. Inner teeth 73 that engage with the claws 72 are formed on the inner periphery of the annular body 71c. The pawl 72 and the internal teeth 73 constitute a ratchet mechanism. FIG. 3 exaggerates the pitch of the internal teeth 73 in consideration of easy viewing.

  The rotating shaft 71a is fixed to the disk 71b, and one end outside the cutting blade 70 is fixed to one end of a power transmission member 77 described later. The other end of the power transmission member 77 is rotatably connected to one end of a rod 74b described later.

  The intermittent rotation mechanism 71 rotates the cutting blade 70 intermittently. The intermittent rotation mechanism 71 rotates the cutting blade 70 at a predetermined rotation angle and rotates the cutting blade 70, thereby bringing the film 11 as a cutting object into contact with an unused area of the blade edge portion 70 a. This prevents variations in the amount of rotation of the cutting blade 70. In the present embodiment, the intermittent rotation mechanism 71 rotates the cutting blade 70 intermittently by 1 °.

  In addition, although the rotation angle of the cutting blade 70 is 1 degree in the said embodiment, it is not restricted to this, You may design suitably based on conditions, such as the diameter D of the cutting blade 70, and the thickness of a cutting target. However, from the viewpoint of the replacement frequency of the cutting blade 70, the rotation angle of the cutting blade 70 is preferably as small as possible.

  As a power source for the intermittent rotation mechanism 71, a drive unit that does not need to have an explosion-proof specification, for example, an air cylinder 74 is used. The air cylinder 74 is connected to a compressor 75 disposed outside the explosion-proof structure 40 by a pipe 76, and generates a driving force for driving the intermittent rotation mechanism 71 using air sent from the compressor 75 through the pipe 76. In the compressor 75, the amount of air supplied to the air cylinder 74 is controlled by a control unit 60 disposed outside the explosion-proof structure 40. The air cylinder 74 has a main body 74a fixed in the cutting device 14, and a rod 74b that reciprocates in the left-right direction in FIG. 3 by supplying air. The rod 74 b is connected to the rotation shaft 71 a of the intermittent rotation mechanism 71 via the power transmission member 77. The power transmission member 77 converts the reciprocating motion of the rod 74 b into a rotational motion, and the power is transmitted to the intermittent rotation mechanism 71. By using the air cylinder 74 as a power source for the intermittent rotation mechanism 71 in this way, the air supply amount and the like are controlled to be constant, and variations in the rotation amount of the cutting blade 70 can be prevented more reliably. In addition, the air cylinder 74 does not need to be explosion-proof, and the air cylinder 74 is connected only by the compressor 75 and the pipe 76, so that the solution film-forming facility 10 can be prevented from being enlarged.

  The intermittent rotation mechanism 71 rotates the cutting blade 70 intermittently at a predetermined timing. As the rotation timing of the cutting blade 70, in this embodiment, the length of the cut film 11 is a predetermined length. The predetermined length depends on the material of the film 11 and the hardness of the film 11 at the time of cutting. The length of the cut film 11 is measured, for example, by measuring the amount of rotation of the roller 28 provided between the explosion-proof structure 40 and the drying chamber 15 by a rotation amount measuring means (not shown) such as a rotary encoder. It is obtained by the control unit 60 based on the amount of rotation. That is, the control unit 60 and the rotation amount measuring means have a function as a film length detection unit that detects the length of the cut film 11. In this example, the length of the cut film 11 is the length of the film 11 conveyed outside the explosion-proof structure 40. Then, the control unit 60 drives the intermittent rotation mechanism 71 when the length of the cut film 11 reaches a predetermined length. Thereby, since the cutting position P is changed at an appropriate timing, the film 11 is efficiently cut.

  In addition, the rotation timing of the cutting blade 70 may be a case where the wear amount of the cutting edge portion 70a at the cutting position P becomes a predetermined wear amount. The amount of wear of the cutting edge portion 70a at the cutting position P is obtained, for example, by photographing the cutting edge of the cutting edge portion 70a at the cutting position P with an imaging unit (not shown) and analyzing the obtained image with the control unit 60. . That is, the control unit 60 and the imaging unit have a function as a wear amount detection unit that detects the wear amount of the cutting edge portion 70a at the cutting position P. The control unit 60 drives the intermittent rotation mechanism 71 when the detected amount of wear reaches a predetermined amount of wear. In addition, when arrange | positioning in the cutting device 14, an imaging | photography means is preferable to set it as an explosion-proof specification.

  With the above configuration, the film 11 as a cutting object is cut by the cutting edge portion 70a in a fixed state. The intermittent rotation mechanism 71 rotates the cutting blade 70 intermittently in the circumferential direction, and changes the cutting position P at which the film 11 is cut at the blade edge portion 70a. Thereby, the enlargement of the solution casting apparatus 10 is prevented, and the film 11 is efficiently cut.

  The cutting blade 70 is a round blade in this embodiment, but may be a polygonal blade. The round blade and the polygonal blade suppress the enlargement of the cutting device 14 as compared with the flat blade. When the round blade and the polygonal blade are compared, a round blade that can use the entire region of the cutting edge portion 70a as the cutting position P is preferable from the viewpoint of the replacement frequency of the cutting blade 70.

  The diameter D of the cutting blade 70 is in the range of 50 mm or more and 300 mm or less, and the cutting amount C that is the difference between the radius of the cutting blade 70 and the shortest distance from the center of the cutting blade 70 to the film 11 is 5 mm or more and 20 mm or less. It is preferable to be within the range. When the diameter D is 50 mm or more and the cutting amount C is 5 mm or more, the cutting is stabilized compared to the case where both or one of the diameter D and the cutting amount C is less than the above numerical values. Since the diameter D is 300 mm or less and the cutting amount C is 20 mm or less, cutting is more stable than when both or one of the diameter D and the cutting amount C is larger than the above numerical values. It becomes. The diameter D is more preferably in the range of 100 mm to 300 mm, and still more preferably in the range of 150 mm to 250 mm. The cutting depth C is more preferably in the range of 10 mm or more and 15 mm or less. In the present embodiment, the diameter D is 200 mm, and the cutting depth C is 12 mm.

  The grooved roller 54 is disposed on the other film surface side of the film 11. In other words, the cutting blade 70 and the grooved roller 54 are in a state of facing each other through the conveyance path of the film 11. The grooved roller 54 has a groove 54a formed in the circumferential surface so as to extend in the circumferential direction. The grooved roller 54 is arranged in a state where the groove 54a corresponds to the blade edge portion 70a, and supports the film 11 guided from the support roller 50b from the other film surface side. At the time of cutting into the film 11, since the tip of the film 11 is supported, the stability of the cutting is good. Further, it is more preferable that the grooved roller 54 supports the film 11 not only during the above-described cutting but also during the cutting. The groove 54a functions as a receiving groove that receives the blade edge portion 70a. That is, the blade edge part 70a is inserted into the groove 54a. Thereby, the film 11 is completely cut | disconnected in the thickness direction. The groove 54a is preferably not in contact with the cutting edge portion 70a. Since the groove 54a is not in contact with the blade edge portion 70a, the cutting blade 70 is prevented from being damaged. The groove width of the groove 54a is, for example, about 2 mm to 3 mm, and is appropriately designed based on conditions such as the material of the cutting blade 70, the thickness of the cutting blade 70 or the cutting edge portion 70a, and the temperature in the cutting device 14. It's okay. As described above, the grooved roller 54 has a function as a support member that supports the film 11 on the peripheral surface and a function as a receiving roller that receives the blade edge portion 70a.

  The intermittent rotation mechanism 71 preferably rotates the cutting blade 70 in the transport direction X of the film 11 (counterclockwise direction in FIG. 3). That is, the intermittent rotation mechanism 71 preferably changes the cutting position P of the cutting blade 70 to the upstream side in the transport direction X of the film 11. When the film 11 is cut by the cutting blade 70, chips of the film 11 are generated, and the chips may adhere to the side surfaces of the cutting blade 70 along the conveyance path. The chips adhere to the blade edge part 70a and cause a decrease in cutting stability. By changing the cutting position P of the cutting blade 70 to the upstream side in the conveyance direction X of the film 11, the cutting edge portion 70 a to which the chips adhere is sent to the downstream side in the conveyance direction X of the film 11 and the chips are adhered. Since there is no upstream blade edge portion 70a at the cutting position P, the cutting stability is good. Further, when the cutting blade 70 is rotated during the cutting of the film 11, the film 11 is pressed against the grooved roller 54 by the rotation of the cutting blade 70, so that the stability of cutting is further improved.

  In addition, when the rotation direction of the cutting blade 70 and the conveyance direction X of the film 11 are made the same, it is preferable that the intermittent rotation mechanism 71 fixes the rotating shaft 71a during the cutting of the film 11. Thereby, the cutting blade 70 is rotated by the conveyance of the film 11, that is, the accompanying rotation of the cutting blade 70 is further prevented, and the stability of cutting is further improved.

  The intermittent rotation mechanism 71 is a ratchet mechanism in the present embodiment, but may be a one-way clutch mechanism (also referred to as a free wheel) that transmits a rotational force in only one direction.

  The removing unit 62 removes the chips of the film 11 generated by the cutting blade 70 cutting. The swarf of the film 11 may adhere to the cutting blade 70, and the swarf is scattered and adheres to the film 11 to cause deterioration of the quality of the film 11 as a product. In the present embodiment, the removing unit 62 is disposed downstream of the cutting position P in the transport direction X and on the other film surface side of the film 11.

  The removing unit 62 includes a cover 80, a suction unit 81, and a blowing unit 82. The cover 80 covers the blade edge portion 70a near the cutting position P and partitions the periphery of the blade edge portion 70a from the external space. The cover 80 is formed with a slit-like opening into which the cutting blade 70 is inserted.

  The suction part 81 sucks the chips adhering to the cutting blade 70. The suction part 81 is connected to a suction device 83 arranged outside the explosion-proof structure 40 by a pipe 84. The suction unit 83 discharges the chips scattered inside the cover 80 by sucking the air in the cover 80 through the pipe 84. The suction unit 83 controls the flow rate of air sucked by the control unit 60. Thereby, the quality deterioration as a product of the film 11 is suppressed more reliably.

  The blowing unit 82 blows air to the cutting blade 70. By the air that has exited from the blow-out portion 82, the chips are more reliably removed from the cutting blade 70. The blowing part 82 is, for example, a nozzle in which an opening as an air blowing outlet is formed at the tip. The blowing part 82 is connected to a blower 85 arranged outside the explosion-proof structure 40 by a pipe 86. The blower 85 supplies air to the blowing part 82 through the pipe 86. In the blower 85, the flow rate of air supplied to the blowing unit 82 is controlled by the control unit 60.

  The removing unit 62 preferably includes the suction unit 81 and the blowing unit 82 as in the present embodiment, but only one of them may be used.

  The warning unit 64 issues a warning that it is time to replace the cutting blade 70. In the present embodiment, the control unit 60 determines whether it is time to replace the cutting blade 70. The control unit 60 has a function as a rotation amount detection unit that detects the rotation amount of the cutting blade 70 and a function as a determination unit that determines whether it is time to replace the cutting blade 70 based on the detected rotation amount. have. The amount of rotation of the cutting blade 70 is determined based on the amount of air supplied to the compressor 75, for example. The determination of the replacement time of the cutting blade 70 is performed based on, for example, a comparison between the detected rotation amount and a predetermined threshold, and it is determined that it is the replacement time of the cutting blade 70 when the rotation amount exceeds a predetermined threshold. . The control unit 60 activates the warning unit 64 when it is determined that it is time to replace the cutting blade 70. That is, the warning unit 64 issues a warning to that effect when it is determined by the control unit 60 as the determination unit that it is time to replace the cutting blade 70. For example, the warning unit 64 displays the total rotation amount of the cutting blade 70 on a display device (not shown). Thereby, since the cutting blade 70 is replaced at an appropriate timing, the cutting efficiency of the film 11 is further improved.

  In the present embodiment, the intermittent rotation mechanism 71 is driven by the air cylinder 74. However, instead of or in addition to the air cylinder 74, a configuration in which the intermittent rotation mechanism 71 is manually driven by an operator may be provided. Good. In this case, the wear amount detection unit described above and a notification unit that notifies that it is time to change the cutting edge portion 70a are provided. When the wear amount detected by the wear amount detection unit becomes a predetermined wear amount, the notification unit notifies the display device and / or the speaker disposed outside the explosion-proof structure 40.

DESCRIPTION OF SYMBOLS 10 Solution casting apparatus 11 Film 11a Side edge 12 Casting device 13 Clip tenter 14 Cutting device 14a Chamber 15 Drying chamber 16 Cooling chamber 17 Winding chamber 18 Dope 19 Die 19a Outlet 20 Wind shield member 22 Casting belt 23 Rotating roller 23a Rotating shaft 24 Rotating roller 24a Rotating shaft 25 Stripping roller 28 Roller 29 Clip 30 Blower device 32 Crusher 33 Casting film 34 Roller 35 Knurling roller 36 Winding machine 37 Winding core 38 Press roller 39 Seal roller 40 Explosion-proof structure 50a -50d Support roller 52 Cutting unit 54 Grooved roller 54a Groove 56 Recovery roller 60 Control unit 62 Removal part 64 Warning part 70 Cutting blade 70a Blade edge part 71 Intermittent rotation mechanism 71a Rotating shaft 71b Disk 71c Annular body 72 Claw 73 Internal teeth 4 air cylinders 74a body 74b rods 75 compressor 76 pipe 77 power transmission member 80 cover 81 suction portion 82 blowout unit 83 aspirator 84 pipe 85 blower 86 pipe C depth of cut D diameter P cutting position SL slit line X conveying direction

Claims (12)

In a cutting device that continuously cuts a long cutting object being conveyed in the longitudinal direction,
A cutting blade which is rotatably provided at a fixed position in the width direction of the conveyance path of the cutting object, and a blade edge portion is formed on the periphery along the rotation direction;
An intermittent rotation mechanism for intermittently rotating the cutting blade and changing the cutting position of the cutting edge part for cutting the cutting object;
A cutting device comprising:   The cutting object is supported by a peripheral surface, a groove is formed on the peripheral surface so as to extend in a circumferential direction, and the groove includes a grooved roller disposed in a state of facing the blade edge portion. The cutting device as described.   The cutting device according to claim 2, wherein the groove is not in contact with the cutting edge portion.   The said intermittent rotation mechanism is a cutting device of any one of Claim 1 to 3 which rotates the said cutting blade in the conveyance direction of the said cutting target object.   The cutting device according to any one of claims 1 to 4, further comprising a removing unit that removes chips of the cutting object generated by cutting the cutting blade.   The cutting device according to claim 5, wherein the removing unit includes a suction unit that sucks the chips adhering to the cutting blade.   The cutting device according to claim 5 or 6, wherein the removing unit includes a blowing unit that blows air to the cutting blade. A rotation amount detection unit for detecting the rotation amount of the cutting blade;
A determination unit that determines whether it is time to replace the cutting blade based on the rotation amount;
The cutting device according to any one of claims 1 to 7, further comprising a warning unit that issues a warning to that effect when the determination unit determines that it is the replacement time.   The cutting device according to any one of claims 1 to 8, wherein the cutting blade is a round blade. The diameter of the cutting blade is in the range of 50 mm to 300 mm,
The cutting device according to claim 9, wherein a cutting amount, which is a difference between a radius of the cutting blade and a shortest distance from the center of the cutting blade to the object to be cut, is in a range of 5 mm to 20 mm. An air cylinder having a fixed main body and a rod that reciprocates by supplying air to the main body;
The cutting device according to any one of claims 1 to 10, further comprising a power transmission member that converts a reciprocating motion of the rod into a rotational motion and transmits power to the intermittent rotation mechanism. A step of continuously conveying a long film in the longitudinal direction of the film;
A step of cutting the film with a cutting blade that is rotatably provided at a fixed position in the width direction of the transport path of the film and has a cutting edge formed on the periphery along the rotation direction;
A step of intermittently rotating the cutting blade to change the cutting position of the cutting edge part for cutting the film;
A method for producing a film.

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