JP2769285B2 - Method and apparatus for producing mixing blade of static mixer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing blade of a static mixer, and more particularly to a manufacturing method and a manufacturing apparatus capable of efficiently processing the mixing blade with a small number of manufacturing equipment.

[0002]

2. Description of the Related Art A mixing blade having a plurality of elements which are alternately twisted in the opposite direction by approximately 180 ° and are continuously provided in a longitudinal direction in a state where the phases are shifted by a predetermined angle is located in a cylindrical member. 2. Description of the Related Art A static mixer that is fixedly arranged and mixes a fluid, for example, a liquid or a powder, that flows in the cylindrical member in a longitudinal direction is known. The static mixer 10 shown in FIG.
The mixing blades 14 fixedly disposed inside the mixing blades 14 are composed of a plurality of (six in the figure) elements 16 which are alternately twisted in the opposite direction by 180 ° in the longitudinal direction while being out of phase by 90 °. The fluid supplied from one of the openings is divided into two by each element 16 and is made to flow in the opposite direction to be uniformly mixed. Such static mixers not only mix fluids, but also provide excellent effects in homogenization, gas absorption, reaction, heating, heat exchange, etc., and are used in petrochemical, textile, food, water treatment, It is used in a wide range of fields such as the pulp and paper industry.

[0003] The mixing blade 14 uses, for example, a long strip-shaped material 20 shown in FIG. 16 (a), and each step of (b) a twisting step, (c) a slit processing step, and (d) a phase shifting step. It is manufactured through In other words, in the twisting step (b), the strip-shaped material 20 is gripped by a plurality of gripping means arranged at a distance of one element 16 and twisted, so as to be rotated by 180 °. A torsion plate 22 having a plurality of elements 16 which are alternately twisted in opposite directions is manufactured. In the slit processing step (c), both sides of the torsion plate 22 at the boundary between the elements 16 are cut by a cutting machine or the like. Are formed from the slits 24. In the phase shifting step (d), each of the elements 1 divided by the slits 24 is formed.
The twisting process is performed so that the phase of No. 6 is alternately shifted by 90 °. The manufacturing method described in Japanese Patent Application Laid-Open No. 1-164424 is one example of this. In the step (b), the belt-shaped material is gripped by five gripping means, and two steps from both ends.
By rotating the second gripping means by 180 °, four elements are simultaneously processed between each gripping means. Japanese Patent Application Laid-Open No. 4-135633 describes a method in which a belt-shaped material is gripped by a pair of gripping means, and one of the gripping means is rotated by 180 ° to twist the elements one by one. In Japanese Patent Application Laid-Open No. 4-135633, the (c) slitting step is performed before the (b) twisting step.

[0004]

However, in such a conventional method for manufacturing a mixing blade, a slit is formed at all boundaries of each element in a slit processing step, and then the phase of each element is made constant in a phase shift step. Because the angle is shifted, the processing efficiency is not always good, and dedicated equipment is required for each process, which increases equipment costs.
In addition, there is a problem that a large installation space is required. The manufacturing method described in Japanese Patent Application Laid-Open No. 4-135633 also has a similar problem because the order of the steps is different but each step must be performed separately.

The present invention has been made in view of the above circumstances, and an object of the present invention is to enable efficient production of a mixing blade with a small number of production facilities.

[0006]

According to a first aspect of the present invention, a plurality of elements which are alternately twisted counterclockwise by approximately 180 ° each have a predetermined constant angle phase. Mixing blades provided continuously in the longitudinal direction in a displaced state are disposed in a fixed position in the cylindrical member, and the mixing blades of the static mixer for mixing the fluid flowing in the cylindrical member in the longitudinal direction are elongated. a method of manufacturing a strip-shaped material, (a) by subjecting the twisting process to said strip material, producing a twist plate with a plurality of elements that are twisted in opposite around alternately by approximately 180 ° to continuously (B) gripping the torsion plate at least one of a pair of gripping means gripping both sides in the longitudinal direction of the torsion plate with the boundary portion of the element interposed between the torsion plate and the width direction at the boundary portion And (c) gripping both sides of the boundary where the slits are formed by the pair of gripping means, and relatively rotating the pair of gripping means by the predetermined angle. A phase shifting step of shifting the phase by a certain angle at the boundary, and (d) moving one of the pair of gripping means by the length of one of the elements in the longitudinal direction of the torsion plate. To and from
A pitch feed step of moving the torsion plate by one of the elements by gripping the torsion plate in one of the outward path and the return path.

[0007]

[Effects and effects of the first invention] That is, when forming a slit in the twisted plate manufactured in the twisting step and shifting the phase of each element by a fixed angle, the twisted plate is gripped by at least one of a pair of gripping means. After a pair of slits are formed at the boundary in the state where the slits are formed (slit processing step), both sides of the boundary at which the slit is formed are gripped by a pair of gripping means, and both gripping means are relatively rotated to form the boundary. The phase of the element on both sides of the torsion plate is shifted by a fixed angle (phase shifting step), and one of the pair of gripping means is reciprocated to move the torsion plate one element at a time and feed the pitch (pitch feed). Step), the slit processing step and the phase shift step are performed for each pitch feed. As a result, the slitting process and the phase shifting process are performed continuously while feeding the twisted plate at a pitch, and these processes can be performed efficiently, while the slitting and the phase shifting are performed separately. The number of manufacturing facilities is reduced as compared with the case of using facilities, so that the facility costs can be reduced and the installation space can be saved.

Here, when forming a pair of slits from both sides in the width direction at the boundary portion, the slits can be formed simultaneously from both sides of the twisted plate using, for example, a pair of cutting machines. After processing one slit by the cutting machine described above, the twisted plate may be rotated by approximately 180 ° to process the slit on the opposite side.

[0009]

According to a second aspect of the present invention, there is provided a method for manufacturing a mixing blade of a static mixer according to the first aspect, wherein the slit processing step, the phase shifting step, and the pitch feeding step are preferably performed. A device,
(A) a boundary gripping means for detachably gripping a boundary of the element in the torsion plate and positioning a phase around a center line of the torsion plate; and (b) detachable the element portion in the torsion plate. (C) a rotating body that holds one of the boundary part holding means and the element holding means and is driven to rotate around the center line of the torsion plate;
(D) One of the boundary gripping means and the element gripping means is reciprocated in the longitudinal direction of the torsion plate by a length corresponding to one of the elements, and one of the outward path and the return path is one of them. A first moving device for moving the torsion plate gripped by the gripping unit from the boundary gripping unit side by one element to the element gripping unit; and (e) the phase is positioned by the boundary gripping unit and the boundary is determined. Cutting that is moved toward and away from the torsion plate gripped by at least one of the part gripping means and the element gripping means and forms the slit at a boundary located between the boundary gripping means and the element gripping means Machine and
(F) a second moving device that drives the cutter toward and away from the torsion plate, and (g) substantially rotates the rotating body in a state where the torsion plate is gripped by gripping means disposed on the rotating body. By rotating it by 180 °, the twisted plate is
By rotating the slit by 0 °, the slitting machine can cut the slit from both sides in the width direction at the boundary portion, and rotate the torsion plate while holding the torsion plate with both the boundary portion gripping means and the element gripping means. A rotation driving device for rotating the body by the fixed angle to shift the phase by the fixed angle at the boundary where the slit is formed.

[0010]

In such a manufacturing apparatus, first, the phase and longitudinal position around the center line are positioned by gripping the torsion plate by the boundary gripping means. In a state where the twisting plate is gripped by at least one of the element gripping means, the cutting machine is moved closer to or away from the twisting plate by the second moving device, and one slit is formed at a boundary portion located between the two gripping means. . Next, in a state where the twisted plate is gripped only by the gripping means on the side provided on the rotating body, the rotating body is rotated by approximately 180 ° by the rotation driving device, thereby rotating the twisted plate by approximately 180 °. In this state, a slit on the opposite side is formed at the boundary by gripping the torsion plate and reciprocating the cutting machine in the same manner as described above. After that, while the torsion plate is gripped by both the boundary gripping means and the element gripping means, the rotating body is rotated by a fixed angle by the rotation driving device, so that the phases of the elements on both sides of the boundary where the slit is formed are changed. Shift by a certain angle. On the other hand, when one of the boundary gripping means and the element gripping means is reciprocated by the first moving device, the torsion plate is moved by one element from the boundary gripping means side by one element on the outward path or the return path. The pitch is fed to the side, and each time the pitch is fed, a slit is formed in the same manner as described above, and the phase is shifted by a certain angle, whereby the target mixing blade is manufactured.

As described above, according to the manufacturing apparatus of the second invention, since the slit processing and the phase shift can be performed continuously, the same effects as those of the first invention can be obtained. Further, in the second invention, since the phase and the longitudinal position of the torsion plate are positioned by the boundary gripping means, it is possible to satisfactorily perform the slit processing at the boundary by the cutting machine, and to adjust the phase and the twist of the torsion plate. There is no need to provide a separate means for positioning the longitudinal position. Further, by inverting the torsion plate by 180 °, a pair of slits can be formed at both sides of the boundary with a single cutting machine.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the strip material 20 according to the method of the present invention will be described.
An embodiment in which the mixing blade 14 is manufactured from the following will be described in detail with reference to the drawings. FIG. 1 is a diagram for explaining the outline of the manufacturing process of this embodiment. In FIG. 1B, a plurality of elements 16 that are alternately twisted in the opposite direction by 180 ° by twisting the belt-shaped material 20 are shown. A twisted plate 22 having a continuous shape is manufactured. In FIG. 3C, slits 24 are formed on both sides of the boundary of each element 16 while the twisted plate 22 is pitch-feeded by one of the elements 16. By twisting the elements 16 on both sides divided by the slit 24 by 90 ° to shift the phase, the desired mixing blade 14 is manufactured.

FIG. 2 and FIG. 3 are front views of the twisting device 30 for performing the step (b), ie, the twisting step, in which main parts are cut away. FIG. 4 is a plan view in which a part of the twisting device 30 is cut away. The twisting device 30 is provided with a work mounting table 32 on the left side shown in FIG. 2, on which the belt-shaped material 20 supplied by a supply device (not shown) or a manual operation of an operator is placed and a guide rod 34.
The belt 20 is fed rightward by a feed claw 38 attached to a feed cylinder 36 that reciprocates in the left-right direction while being guided. The feeding cylinder 36 has a built-in nut member screwed to the screw shaft 40, and linearly moves by rotating the nut member by air drive. Note that FIG. 2 shows a state in which the band-shaped material 20 is supplied onto the work mounting table 32, and FIGS. 3 and 4 show a state in which the band-shaped material 20 is fed rightward to perform twisting.

[0014] The work rest 32, together are rotatably supported around the center line O ₁ by the supporting plate 42 at its left end, right end, the rotatable support plate 44 around the center line O ₁ It is integrally fixed to the arranged rotating body 46 via a gear 48.
Gear 48 is fitted with and fixed to the center line O ₁ and rotator 46 concentrically, to the left end portion of the workpiece mounting table 32, the gear 50 is the center line O ₁ and concentric with the same diameter as the gear 48 The two gears 48 and 50 are meshed with drive gears 52 and 54, respectively. Drive gears 52, 5
4 in the same diameter, with is rotatably disposed around the center line parallel O ₂ with the center line O _1, forward by the rotational driving apparatus 60 having a pair of rotary cylinders 56 and 58 of the air-driven and reverse directions is adapted to be driven integrally rotates, by this, the work table 32 is rotated approximately 180 ° forward and reverse directions about the center line O _1.
This rotation is for twisting the element 16 twisted by 180 °, and is set slightly larger than 180 ° in consideration of springback. Strip material 20
Is mounted on the work mounting table 32 in such a position that its center in the width direction substantially coincides with the center line O _1.
2 while being guided to the right. The diameter of the drive gears 52 and 54 is
The rotation angle of the driving gears 52 and 54 by the rotation driving device 60 is slightly smaller than 180 °. At the right end of the work mounting table 32, a pressing roller 64 that presses the band material 20 against the work mounting table 32 in order to suppress the belt material 20 from being bent downward during rotation.
Is provided at the tip of the output rod. The pressing roller 64 is parallel to the band material 20 at right angles to the moving direction so as to allow the band material 20 to move rightward, that is, FIG.
In this state, it is mounted so as to be rotatable about an axis perpendicular to the paper surface.

On the right end face of the rotating body 46, a rotating clamp 70 is provided as shown in FIG.
As shown in FIG. 5, which is partially cut away in the view of the arrow VV in FIG. 3, the rotating side clamp 70 is provided via a pair of support blocks 72, 74 fixed to the rotating body 46. And is attached to the rotating body 46. On one support block 72, a slide block 78 is provided via a pair of guide rods 76 so as to be movable in the left-right direction of FIG. 5, that is, in the state shown in FIG. Is reciprocated in the left-right direction by an air cylinder 80 attached to the air cylinder. A pair of blocks 82 are fixed to the slide block 78 so as to protrude to the left in FIG. 5, and the leading ends of the blocks 82 are provided with rollers rotatable about an axis perpendicular to the plane of FIG. 84 is attached. Further, the pair of blocks 82 are integrally connected by a connection block 86 at an intermediate portion, and are prevented from being deformed vertically and expanded.

A plate 90 is fixed to the other support block 74 so as to protrude rightward in FIG. 5, and a pair of gripping arms 92 are respectively provided at the leading ends of the plate 90 by pins 94 on the paper of FIG. 5. It is attached so as to be rotatable around an axis perpendicular to. A pair of gripping arms 92
Are arranged so as to protrude to the left in FIG.
Is fixed. The gripping arm 92 is always urged in a direction to expand vertically by a spring member 98 such as a compression coil spring disposed in a middle portion thereof so as to straddle the two gripping arms 92, and is engaged with the roller 84. It is adapted to be combined. Therefore, when the slide block 78 is moved by the air cylinder 80 to the release side, which is the right direction in FIG. 5, the pair of gripping arms 92 are vertically expanded according to the urging force of the spring member 98, while
When the slide block 78 is moved to the left clamp side, the pair of gripping arms 92 are closed and the gripping claws 9 are closed.
Firmly grip the strip material 20 on the center line O ₁ by 6. The solid line in FIG. 5 shows a state in which the belt-shaped material 20 is being gripped, and the dashed line shown for the lower gripping arm 92 is in the released state. The plate 90 is provided with a circular hole 100 that allows the band-shaped material 20 to pass therethrough, and a guide 102 whose left end in FIG.

[0017] The above on the right side of the rotating side clamp 70, the rotation-side clamp 70 and the substantially fixed side clamp 110 of the same configuration are arranged, the strip material 2 on the center line O ₁
0 is gripped. This fixed side clamp 1
10 is disposed on a third slide member 112 of the moving device 108 via a bracket 114, and the third slide member 112 is further provided with a twisted band-shaped material 20.
A work receiving base 116 for receiving the (twisted plate 22) is provided. The third slide member 112 is disposed on the second slide member 118 so as to be movable in the left-right direction, and always has a spring member 120 such as a compression coil spring.
The belt-like material 20 is urged to the right by the right side and is brought into contact with the stopper 122 fixed to the second slide member 118. Permissible. Second slide member 118
Are disposed on the first slide member 124 so as to be movable in the left-right direction, and are reciprocated in the left-right direction by the air cylinder 126 disposed on the first slide member 124. The reciprocating movement of the second slide member 118
This is for feeding the strip-shaped material 20 at a pitch, and its moving stroke is determined in advance by a position adjusting means 128 such as a micrometer that defines a retreating end, that is, a moving end in the right direction, corresponding to the length dimension of the element 16. Adjusted to the specified dimensions. The first slide member 124 is disposed on the base plate 130 so as to be movable in the left-right direction. The first slide member 124 is moved in the left-right direction by rotating the screw shaft 134 by rotating the handle 132. The position of the first slide member 124 is
In a state in which the clamp 18 is advanced to the left, the distance between the fixed-side clamp 110 and the rotary-side clamp 70 is a predetermined size corresponding to the length of the element 16, in other words, the second slide member. It is adjusted to have the same size as the movement stroke of 118.

The actuator of each part of the twisting device 30 is controlled by a controller 136 as shown in FIG. The controller 136 includes a CPU, a RAM,
RO while having temporary storage function of RAM with OM etc.
The microcomputer includes a microcomputer that performs signal processing in accordance with a program stored in advance in the M. The air circuit is switched by a solenoid valve or the like to control the operating states of various air-driven actuators. Although not shown, the controller 136 is supplied with various signals from an operating state of each unit, for example, a sensor that detects that the moving end or the rotating end has been reached, a limit switch, and the like.

FIG. 7 is a flowchart for explaining the contents of the signal processing by the controller 136, that is, the operation of the twisting device 30. In step S1, the work mounting table 3 is set.
The belt-shaped material 20 supplied on the belt 2 is fed to an initial position by a feeding cylinder 36. This initial position is determined so that the tip of the band-shaped material 20 reaches at least the fixed-side clamp 110. In step S2, the output rod of the work holding cylinder 66 is protruded and the band-shaped material 20 is pressed against the work mounting table 32 by the pressing roller 64, and the feeding cylinder 36 is retracted to the left.
In step S3, the band-shaped material 20 is gripped by the fixed-side clamp 110, and in step S4, the band-shaped material 20 is gripped by the rotating-side clamp 70. In step S5, the rotating body 46 is rotated by approximately 180 ° by the rotation driving device 60, whereby the rotating clamp 70 is rotated by approximately 180 ° with respect to the fixed clamp 110, and the belt-shaped material 20 is rotated.
Is turned by approximately 180 ° to process one element 16.

In the next step S6, the rotation side clamp 70
Is released, and in step S7, the second slide member 118 is retracted to the right by the air cylinder 126 of the moving device 108, and the fixed-side clamp 110 is moved to the right, so that the belt-shaped material 20 is moved to the length of the element 16. Move by one pitch corresponding to the dimension. Step S8
Then, the band-shaped material 20 is gripped by the rotating side clamp 70, the fixed side clamp 110 is released in step S9, and the air cylinder 126 is set in step S10.
Thereby, the second slide member 118 is advanced leftward.
Then, after the band-shaped material 20 is gripped by the fixed-side clamp 110 in step S11, the rotating body 46 is rotated by approximately 180 ° in the opposite direction to step S5 by the rotation driving device 60 in step S12, thereby turning the band-shaped material 20 upside down. The second element 16 is processed by being twisted approximately 180 ° in the direction.

In steps S13 to S17, the strip-shaped material 20 is moved by one pitch by the same operation as in steps S6 to S10. In step S18, the number of twists n ₁ has reached a preset set value N ₁ . It is determined whether or not. The number of twists n ₁ is determined, for example, in step S5.
It is counted by a counter or the like that counts up each time the twisting process in S12 is performed, and the number of twists n ₁ is set to a set value N
Until ₁ is reached, the fixed side clamp 1 is set in step S19.
After grasping the band-shaped material 20 by 10, steps S5 and subsequent steps are repeated, and the band-shaped material 20 is sequentially twisted and fed at a pitch. And the number of twists n
When ₁ reaches the set value N _1, and executes the step S20 subsequent to step S18, and ends the series of actuating the rotation-side clamp 70 as released. As a result, a twisted plate 22 having a plurality of elements 16 continuously twisted in the opposite direction alternately by 180 ° is manufactured.
Is taken out of the work cradle 116 by a take-out device (not shown) or manually by an operator. In this embodiment, the number of the elements 16 is an even number. However, for example, if the number of twists n ₁ is checked between steps S10 and S11, the number of the elements 16 is an odd number.
2 can also be produced. Further, it is also possible to determine whether or not to end by detecting the rear end of the torsion plate 22 with a sensor or the like.

On the other hand, FIGS. 8 and 9 show the step of FIG. 1C, that is, the slit processing in which a slit 24 is formed in the twisted plate 22 manufactured by the twisting device 30 and the phase of each element 16 is shifted by 90 °. FIG. 10 is a front view of a notched torsion device 140 for performing a step and a phase shifting step, in which a main part is cut away, and a part thereof is overlapped and divided into a left portion and a right portion, and FIG. FIG. 14 is a plan view in which a part of 140 is cut away. Such a cutting and twisting device 140 constitutes an embodiment of the mixing blade manufacturing device of the second invention, and has a work mounting table 142 on the right side shown in FIG. The torsion plate 22 supplied by the above is placed. The work mounting table 142 is disposed via a spring on a support plate 146 fixed to the base plate 144, and the adjusting screw 1
The height of the upper end can be adjusted by 48, and the torsion plate 22 can be supported at a height position where the center line thereof substantially coincides with a predetermined center line O ₃ .

Below the support plate 146, a first moving device 150 is provided. The first moving device 150 is provided on the first slide member 152 and the first slide member 152 movably in the left-right direction on the base plate 144 similarly to the moving device 108, and is movably provided in the left-right direction. And a third slide member 156 disposed on the second slide member 154 so as to be movable in the left-right direction.
A fixed clamp 160 is provided on the slide member 156 via a support plate 158. The first slide member 152 rotates the screw shaft 164 by rotating the handle 162.
The second slide member 154 is reciprocated in the left and right direction by an air cylinder 166 disposed on the first slide member 152 by being rotated. The stroke is adjusted by a position adjusting means 168 such as a micrometer that defines a retreating end, that is, a moving end in the rightward direction, so that the length becomes substantially the same as the length of the element 16. Further, the third slide member 156 is always urged rightward by a spring member 170 such as a compression coil spring, and is brought into contact with a stopper 172 fixed to the second slide member 154. It is allowed to move to the left according to the decrease in the length dimension due to the twisting in the phase shifting step. In addition, since the decrease in the length dimension due to the twisting process in the phase shifting step is extremely small, it is also possible to dispose the fixed side clamp 160 on the second slide member 154 and omit the third slide member 156. is there.

The fixed side clamp 160 corresponds to a boundary gripping means, and has substantially the same configuration as the clamps 70 and 110. As shown in FIG. 11, a pair of blocks 174 and guide rods 176 are provided. And a pair of slide blocks 178 disposed on the support plate 158 so as to be movable in the vertical direction via a pair of pins 182 rotatably disposed on a block 180 fixed on the support plate 158 via a pair of pins 182. And a gripping arm 184. The slide block 178 is connected to the lower block 17.
The air cylinder 186 is reciprocated in the vertical direction by an air cylinder 186 attached to the slide 4, and a pair of blocks 188 is fixed to the slide block 178.
The pair of blocks 188 are guided by guide rods 176 in the vertical direction together with the slide blocks 178, and rollers 190 are rotatably attached to upper ends of the blocks 188.
Further, flat gripping claws 192 are fixedly provided at upper end portions of the pair of gripping arms 184, respectively. When the slide block 178 is moved to the upper clamp side by the air cylinder 186, the pair of gripping arms 184 are moved. 184
Are closed by the rollers 190 and are the boundaries of the untwisted elements 16 of the torsion plate 22, in other words, the portions gripped by the clamps 70 and 110 when the torsion device 30 performs the torsion process. Is firmly gripped by the gripping claws 192. Thereby, the torsion plate 2
2 is positioned at a phase around the center line such that the boundary is in the vertical direction. The block 180 is provided with a circular hole 194 that allows the torsion plate 22 to pass through, and the torsion plate 22 has a center line O ₃ in the circular hole 194.
A guide 196 for centering substantially concentrically is attached. Note that the support plate 158 is also formed with a notch that allows the torsion plate 22 to pass through. When the slide block 178 is moved to the lower release side, the pair of gripping arms 184 are expanded right and left by their own weight,
The torsion plate 22 is released and the passage in the longitudinal direction is allowed. However, similar to the clamps 70 and 110, a spring member such as a compression coil spring is provided and the grip arm 18 is provided.
4 can also be forcibly expanded.

Returning to FIG. 9, the fixed side clamp 160
A cutting machine 200 is provided above the table. This cutting machine 200 is disposed on a support frame 202 disposed on a base plate 144 so as to be movable in a vertical direction via a pair of guide rails 204. FIG. 12 shows a cross section taken along XII-XII in FIG. As shown in the figure, the torsion plate 2 is driven up and down by a second moving device 208 including an air cylinder 206 so as to be rotated by a rotary cutting blade 210.
The slit 24 is processed into 2. The second moving device 208
It may be configured to include other various drive sources such as a hydraulic cylinder and an electric motor. In addition, the rotary cutting blade 210 is configured by a thin grinder, a milling machine, or the like,
Together with the center line O ₃ is rotatably disposed around an axis parallel directly above the center line O _3, the electric motor 212
, And is rotationally driven via a belt, a speed reducer, and the like. This rotary cutting blade 210 is located on the left side of the fixed side clamp 160 in FIG. 9, and forms the slit 24 at the boundary left only one side from the boundary gripped by the fixed side clamp 160. That is, the first moving device 150 moves the gripping position of the fixed side clamp 160 to one of the elements 16 while the second sliding member 154 is held at the left moving end.
The length of the element 16 is adjusted by the handle 162 so that the length of the element 16 is on the right side of the slit processing position by the rotary cutting blade 210 by one length. Further, a work receiving rod 216 is disposed directly below the rotary cutting blade 210 via a support base 214, and the work receiving rod 216 prevents the twisted plate 22 from escaping during slit processing. At the same time, a chip receiver 218 is provided around the support pedestal 214 to accommodate chips generated by the slit processing. Projecting dimension upward work receiving rod 216 can be adjusted by adjusting screw 220, so that can be supported at a height center line of the twist plate 22 substantially coincides with the center line O _3.

On the left side of the work receiving rod 216,
A rotation-side clamp 224 is provided as element gripping means. The rotating side clamp 224 is attached to a rotating body 228 rotatably disposed around a center line O ₃ on a supporting plate 226 fixed on the base plate 144.
A pair of gripping claws 230 are provided so as to approach and separate from the center line O ₃ . The pair of gripping claws 230 have a substantially arc shape at their distal ends so as to grip the element 16 of the torsion plate 22 from the outer peripheral side. For example, a center line O ₃ is formed by a cam rotationally driven by air pressure. To and away from. A circular hole 232 (FIG. 1) is provided at the center of the rotating side clamp 224 and the rotating body 228, respectively.
2) and 234 (see FIG. 8) are provided so that the slits 24 are formed and the passage of the twisted plates 22 (mixing blades 14) in which the phase of each element 16 is shifted is allowed. .

The rotary body 228 is driven to rotate by a rotary drive 240 having an air-driven rotary cylinder 236 and a stopper cylinder 238 shown in FIG. A gear 242 is fixedly mounted on the left end face of the rotating body 228 concentrically with the center line O _3.
42 is meshed with the drive gear 244 is rotated by the rotary cylinder 236, the rotating body 228 by the rotary cylinder 236 is rotated 180 ° forward and reverse directions about the center line O _3. The diameter of the drive gear 244 is slightly larger than the diameter of the gear 242, and the rotation angle of the drive gear 244 by the rotary cylinder 236 is 18
Less than 0 °. In addition, the stopper cylinder 238, as clearly shown in FIG.
Guide part 2 of support bracket 246 fixed on 44
The stopper rod 250 movably arranged in the up-down direction is moved up and down, and is attached to the lower end of the guide portion 248. At the upper end of the stopper rod 250, the stopper bolt 25 is turned rightward in FIG.
2 is screwed, and when the stopper rod 250 is moved to the rising end by the stopper cylinder 238, the contact block 25 fixed to the rotation-side clamp 224 is fixed.
4 to prevent rotation of the rotation side clamp 224. In other words, from the original position (rotation angle 0 °) shown in FIG.
12 is rotated counterclockwise in FIG. 12, and then the stopper rod 250 is moved to the rising end by the stopper cylinder 238. Thereafter, the rotating clamp 224 is rotated 180 ° clockwise in FIG. 12 together with the rotating body 228. When the return rotation is performed, the rotation is stopped at a position where the contact block 254 contacts the stopper bolt 252. The rotation preventing position can be adjusted by loosening the lock nut 256 and changing the screwing amount of the stopper bolt 252. According to the amount of phase shift between the elements 16, in this embodiment, the rotation preventing position is approximately 90 ° from the original position.
In other words, it is adjusted in consideration of springback so as to prevent further rotation at the position rotated back by about 90 °.

In FIG. 8, a circular hole 260 is provided at the center of the gear 242, a slit 24 is formed, and the twisted plate 22 in which the phase of each element 16 is shifted.
(Mixing blade 14) is allowed to pass therethrough, and a work support 262 is provided on the left side thereof. The work receiving table 262 is provided on the work mounting table 1.
Similarly to 42, it is arranged via a spring on a support plate 264 fixed to the base plate 144, and the height of the upper end can be adjusted by an adjusting screw 266, so that the center line of the torsion plate 22 (mixing blade 14) is provided. Is the center line O ₃
It can be supported at a height position substantially coinciding with.

The actuator of each part of the cutting and twisting device 140 has a controller 270 as shown in FIG.
Is controlled by The controller 270 includes a CPU,
It is equipped with a microcomputer which has a RAM, a ROM, etc., and performs signal processing according to a program stored in the ROM while utilizing the temporary storage function of the RAM. The operation state of various types of actuators is controlled, and the operation state of the electric motor 212 of the cutting machine 200 is controlled. Although not shown, various signals are supplied to the controller 270 from the operating state of each unit, for example, a sensor that detects that the moving end or the rotating end has been reached, a limit switch, and the like.

FIG. 14 is a flow chart for explaining the content of the signal processing by the controller 270, that is, the operation of the cutting and twisting device 140. The torsion plate 22 is a portion which is not twisted by a supply device or an operator's manual operation. The first element 16 is carried into a position where the first element 16 passes through the fixed-side clamp 160 in a posture in which is substantially up and down.
In Step R1, the boundary between the first element 16 and the second element 16 is gripped by the fixed-side clamp 160, so that the untwisted flat portion and the boundary portion of the torsion plate 22 are vertically oriented. As well as being positioned at the phase, the longitudinal position is also positioned at a predetermined position.
Further, in step R2, the torsion plate 22 is gripped by the rotation side clamp 224.
Does not reach the rotation-side clamp 224, so that a flat portion that has not been twisted is gripped from above and below. In a succeeding step R3, the fixed side clamp 160 is released, and in a step R4, the fixed side clamp 160 is retracted rightward by one pitch, that is, the length of one element 16 by the air cylinder 166 of the first moving device 150. . In step R5, the torsion plate 22 is clamped again by the fixed-side clamp 160, and in step R6, the rotation-side clamp 224 is released. Then, in step R7, the fixed side clamp 160 is advanced by one pitch by the air cylinder 166 of the first moving device 150, whereby the torsion plate 22 is advanced leftward by one pitch, and the first boundary portion is the rotary cutting blade 210. In the slit processing part.

In step R8, the torsion plate 22 is gripped by the rotating clamp 224. In step R9, the rotary cutting blade 210 is driven to rotate by the electric motor 212 while rotating.
The cutting machine 200 is lowered and raised by the second moving device 208, and the slit 2 is formed at the boundary by the rotary cutting blade 210.
Process No. 4. In step R10, the fixed side clamp 16
0 is released, and in step R11, the rotary cylinder 23 is released.
12, the rotating body 228 is rotated counterclockwise in FIG.
Drive by 0 °. As a result, the torsion plate 22 is rotated by 180 ° around the center line, and in step R12, the torsion plate 22 is gripped by the fixed-side clamp 160. Then, in step R13, the slit 24 on the opposite side is machined in the same manner as in step R9. . The descending end position of the cutting machine 200 is determined by the slits 24 from both sides of the boundary in steps R9 and R13.
Is adjusted in advance so that a predetermined uncut portion is formed at the center portion of the torsion plate 22 when is processed.

In the next step R14, the stopper rod 250 is raised by the stopper cylinder 238, and in step R15, the rotating body 2 is moved by the rotary cylinder 236.
28 is rotated clockwise in FIG. At this time, the contact block 2 fixed to the rotation side clamp 224
The rotation body 228 is prevented from further rotating at a position where the rotation angle is about 90 ° by contacting the stopper 54 with the stopper bolt 252, whereby the fixed side clamp 160
The torsion plate 22 gripped by both the rotation side clamp 224 and the rotation side clamp 224 is twisted about 90 ° at the boundary where the slits 24 are formed from both sides in steps R9 and R13. In steps R16 to R20, the torsion plate 22 is advanced one pitch to the left in the same manner as in steps R3 to R7. In step R21, the stopper rod 250 is lowered by the stopper cylinder 238. Stopper rod 2
When 50 is lowered, the engagement between the contact block 254 and the stopper bolt 252 is released, and in step R22, the rotating body 228 is rotated by the rotary cylinder 236 so that the rotation angle becomes zero.
Rotate back to the original position of °.

In step R23, it is determined whether or not the number of cuts n ₂ by the cutting machine 200 has reached a preset set value N ₂ . The number of cuts n ₂ is counted by, for example, a counter that counts up each time slit processing is performed in step R13.
Until ₂ reaches the set value N _2, repeat steps R9 following after gripping the torsion plate 22 by the rotation-side clamp 224 at step R24, the pitch torsion plate 22 performs a sequential slitting and twisting process to twist plate 22 Send. Instead of counting the number of cuts n ₂ , step R
It is also possible to count the number of twisting operations of No. 15 and the number of reciprocating rotations of the rotating body 228, or to detect the presence or absence of the element 16 and the rear end of the torsion plate 22 with a sensor or the like to determine whether or not to end. it can. When counting the number of cuts n _2, the number of reciprocating movements of the cutting machine 200 may be counted, or the number of slits processed in both steps R9 and R13 may be counted. In that case, the set value N ₂ Is doubled. Then, when the number of twists n ₂ reaches the set value N ₂ , step R25 is executed following step R23, and the fixed-side clamp 160 is released to complete a series of operations. As a result, a mixing blade 14 having a plurality of elements 16 that are alternately twisted in the opposite direction by 180 ° and is continuously provided in the longitudinal direction with a phase shift of about 90 ° is manufactured, and the mixing blade 14 includes: It is taken out from the work receiving base 262 by a take-out device (not shown) or a manual operation of an operator.

The cutting and twisting device 140 moves the torsion plate 22 one pitch at a time while
And the twisting for shifting the phase of each element 16 by about 90 ° are continuously performed, so that such processing can be performed efficiently, while the slit processing and the twisting are performed by separate facilities. As compared with the case, the number of manufacturing facilities is reduced, the facility cost can be reduced, and the installation space can be saved. In addition, since the phase and the longitudinal position of the torsion plate 22 are positioned by the fixed-side clamp 160, the slit 24 can be satisfactorily formed at the boundary by the cutting machine 200, and the phase and the longitudinal position of the torsion plate 22 are positioned. There is no need to provide a separate means for performing this. Further, the torsion plate 22 is turned 180 ° so that the single cutting machine 20
Since a pair of slits 24 are formed on both sides of the boundary portion by 0, there is an advantage that the device is configured simply and inexpensively.

In this embodiment, of the series of operations performed by the controller 270, steps R9 and R1
3 is a slit processing step, step R15 is a phase shift step, and steps R16, R17, R18, R19, and R20 are pitch feed steps.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in other forms.

For example, in the above-described embodiment, an air-driven actuator such as the rotary cylinders 56, 58, and 236 is mainly used. However, a rotary drive means such as an electric motor or a screw shaft is rotationally driven by an electric motor. It is also possible to employ other various driving means such as a linear moving means for reciprocating a moving member screwed to the screw shaft or a hydraulically driven actuator.

The twisting device 30 twists the elements 16 one by one while feeding the belt-shaped material 20 at a pitch. As described in Japanese Patent Application Laid-Open No. 1-164424, the twisting device 30 has three or more elements. It is also possible to use a twisting device that grips and twists a plurality of elements 16 at the same time.

Further, the twisting device 30 is configured to feed the band-shaped material 20 from the rotation-side clamp 70 to the fixed-side clamp 110 by the fixed-side clamp 110. May be sent at a pitch.

Further, the cutting and twisting device 140 is configured to grip the torsion plate 22 with both the fixed side clamp 160 and the rotating side clamp 224 to perform slit processing. After gripping and positioning the boundary portion, slit processing can be performed by gripping the torsion plate 22 with only one of the fixed-side clamp 160 and the rotating-side clamp 224.

The cutting and twisting device 140 feeds the torsion plate 22 at a pitch by reciprocating the fixed clamp 160 by the first moving device 150. The twisting plate 22 may be configured to be pitch-fed by being reciprocated by the device. While the rotation side clamp 224, that is, the element gripping means, is arranged so as not to rotate,
Fixed clamp 160 for positioning the phase of torsion plate 22
May be arranged on a rotating body and driven to rotate by a rotation driving device.

Although not specifically exemplified, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a shape change when a mixing blade is manufactured from a band-shaped material according to the method of the present invention.

FIG. 2 is a view for explaining an example of a twisting device suitably used for performing a twisting step of manufacturing a twisted plate from a belt-shaped material according to the method of the present invention, and is a partially cutaway front view showing a left side portion.

FIG. 3 is a partially cutaway front view showing a right side portion of the twisting device of FIG. 2;

FIG. 4 is a plan view of the twisting device of FIGS. 2 and 3 with a part cut away.

5 is a partially cutaway view taken along the line VV in FIG. 3;

FIG. 6 is a block diagram illustrating a control system of the twisting device of FIGS. 2 and 3;

FIG. 7 is a flowchart illustrating the operation of the twisting device of FIGS. 2 and 3;

FIG. 8 is a view for explaining a cutting and twisting apparatus which is an embodiment of the apparatus of the present invention suitably used for producing a mixing blade from a twisted plate according to the method of the present invention, and a part showing a left side portion is cut away. It is a front view.

FIG. 9 is a partially cutaway front view showing a right side portion of the cutting and twisting apparatus of FIG. 8;

FIG. 10 is a plan view of the notch twisting device of FIGS. 8 and 9 with a part cut away.

FIG. 11 is a front view of the fixed-side clamp shown in FIG. 9;

12 is a diagram showing a cross section taken along line XII-XII in FIG. 9;

FIG. 13 is a block diagram illustrating a control system of the cutting and twisting device of FIGS. 8 and 9;

FIG. 14 is a flowchart illustrating the operation of the cutting and twisting apparatus of FIGS. 8 and 9;

FIG. 15 is a cross-sectional view illustrating an example of a static mixer.

FIG. 16 is a diagram illustrating an example of a shape change when a mixing blade is manufactured from a band-shaped material according to a conventional manufacturing method.

[Explanation of symbols]

10: Static mixer 12: Cylindrical member 14: Mixing blade 16: Element 20: Strip material 22: Twisting plate 24: Slit 140: Cutting and twisting device (mixing blade manufacturing device of the second invention) 150: First moving device 160: Fixed Side clamp (boundary gripping means) 200: Cutting machine 208: Second moving device 224: Rotating clamp (element gripping means) 228: Rotating body 240: Rotary driving device Step R9, R13: Slit processing step R15: Phase shift Process Steps R16 to R20: Pitch feed process

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-135633 (JP, A) JP-A-59-186636 (JP, A) JP-A-1-164424 (JP, A) 45943 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B01F 5/00

Claims (2)

(57) [Claims] 1. A mixing blade having a plurality of elements which are alternately twisted in the opposite direction by approximately 180 ° and are continuously provided in a longitudinal direction in a state of being shifted in phase by a predetermined angle, is located in a cylindrical member. A static mixer that is fixedly arranged and mixes a fluid that flows in the longitudinal direction in the cylindrical member.
A method of manufacturing the mixing blade of the above from a long strip material, by twisting the strip material, approximately 180 °
A twisting step of manufacturing a torsion plate having the plurality of elements successively twisted alternately and counterclockwise, and a pair of grippers for gripping both longitudinal sides of the torsion plate with a boundary between the elements interposed therebetween A slit processing step of gripping the torsion plate on at least one of the means and forming a pair of slits from both sides in the width direction at the boundary, and gripping both sides of the boundary where the slit is formed by the pair of gripping means And a phase shifting step of shifting the phase by the fixed angle at the boundary by relatively rotating the pair of gripping means, and changing one of the pair of gripping means to one of the elements.
The torsion plate is reciprocated in the longitudinal direction of the torsion plate by the length of one tongue, and the torsion plate is gripped in one of the outward path and the return path, whereby the torsion plate is moved to one of the elements.
And a pitch feeding step of moving the mixing blade by one pitch. 2. The manufacturing apparatus according to claim 1, wherein the slit processing step, the phase shift step, and the pitch feed step are performed, wherein the boundary of the element in the twisted plate is provided. Boundary portion gripping means for detachably gripping the portion and positioning the phase around the center line of the torsion plate; element gripping means for detachably gripping the element portion of the torsion plate; and A rotating body that holds one of the element gripping means and is driven to rotate around the center line of the torsion plate; and that one of the boundary gripping means and the element gripping means corresponds to one of the elements. In the longitudinal direction of the torsion plate by the length of 1 of the element to have been twist plate from the boundary portion gripping means side to the element gripping means side
A first moving device to move the torsion plate, and a phase is positioned by the boundary gripping means, and is moved toward and away from the torsion plate gripped by at least one of the boundary gripping means and the element gripping means, A cutting machine for forming the slit at a boundary located between the boundary gripping means and the element gripping means; a second moving device for driving the cutting machine closer to and away from the torsion plate; The torsion plate is rotated by approximately 180 ° in a state where the torsion plate is gripped by the gripping means disposed on the torsion plate, whereby the torsion plate is rotated by approximately 180 °, and both sides in the width direction at the boundary portion by the cutting machine. And allowing the rotating body to be processed in a state where the twisting plate is gripped by both the boundary gripping means and the element gripping means. A rotary driving device for rotating the phase by a predetermined angle at a boundary where the slit is formed by rotating the mixing blade by a predetermined angle.