Porous membrane microtension unwinding device

Abstract

The application discloses a kind of porous membrane microtension unwinding device, including setting in the rack along porous membrane material advancing direction in order unwinding device, carbon fiber roller device, flattening roller device, carrier roller device, edge roller device.Unwinding device includes material shaft, material shaft both ends are provided with cone top, the cone top of one end is also connected with adjusting device, and the specific structure of adjusting device is as follows: including hand wheel, hand wheel is connected with screw rod, the screw nut block of screw rod end is connected with material shaft, the cone top of other end is also connected with hysteresis clutch, hysteresis clutch is also connected with servo drive device, and the specific of servo drive device is as follows: including servo motor, the input shaft of servo motor motor is connected with speed reducer, the output shaft of speed reducer is connected with hysteresis clutch.The application solves the problem that porous membrane unwinding equipment cannot realize microtension control lower than 3N in prior art, and unwinding tension is greater than 3N, which can cause tensile deformation of porous membrane and lead to unqualified product.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology of key materials and equipment for new energy, and specifically relates to a porous membrane micro-tension unwinding device. Background Technology

[0002] The hydrogen energy and lithium battery industries are important components of the new energy sector, driving the rapid development of new energy technology. PTFE, PE, PP, and other polymeric microporous membranes are key matrix materials for the preparation of hydrogen energy proton exchange membranes and lithium battery separators. However, due to their thinness and susceptibility to stretching and deformation, the production processes of proton exchange membranes and lithium battery separators are difficult, and the unwinding equipment technology has high barriers to entry. Currently, most commonly used porous membrane unwinding equipment on the market has complex structures and cannot achieve micro-tension control below 3N. Unwinding tension greater than 3N will cause stretching deformation of the porous membrane, leading to product defects. This invention utilizes a novel micro-tension unwinding device that can achieve an unwinding tension of less than 3N at a lower cost. Summary of the Invention

[0003] The purpose of this invention is to provide a porous membrane micro-tension unwinding device, which solves the problem that existing porous membrane unwinding equipment cannot achieve micro-tension control below 3N, and that unwinding tension greater than 3N will cause tensile deformation of the porous membrane, resulting in unqualified products.

[0004] The technical solution adopted in this invention is a porous membrane micro-tension unwinding device, characterized in that it includes an unwinding device, a carbon fiber roller device, a flattening roller device, a support roller device, and a pressing roller device arranged sequentially on the frame along the direction of porous membrane material movement.

[0005] The invention is further characterized in that,

[0006] The unwinding device includes a material shaft with conical tops at both ends. One of the conical tops is connected to an adjustment device. The adjustment device consists of a handwheel connected to a lead screw, a lead screw nut connected to the material shaft, and a guide shaft at the bottom of the lead screw. The other conical top is connected to a hysteresis clutch, which is in turn connected to a servo drive device. The servo drive device consists of a servo motor, the input shaft of which is connected to a reducer, and the output shaft of the reducer connected to the hysteresis clutch.

[0007] The carbon fiber roller includes a carbon fiber roller body, which is fixed to the frame by bearing seats. The shaft ends of the carbon fiber roller body are installed in bearings, and the bearings are installed in bearing seats.

[0008] The carbon fiber roller body is made of lightweight carbon fiber.

[0009] The flattening roller device includes a flattening roller body, which is fixed to the frame by supports. Both ends of the flattening roller body are fixedly installed on the supports. The flattening roller body is the driving roller. One end of the flattening roller body is also connected to the flattening roller drive device. The flattening roller drive device includes a motor. The input shaft of the motor is connected to a reducer. The output shaft of the reducer is connected to the flattening roller shaft head through a pulley and a synchronous belt. The end of the flattening roller body connected to the flattening roller drive device is also equipped with a flattening roller adjustment handwheel.

[0010] The flattening roller of the flattening roller device is a rubber strip type.

[0011] The idler roller device includes an idler roller body, which is fixed on the frame. The two ends of the idler roller body are mounted in bearing seats through bearings, and the bearing seats are fixed on the frame. The diameter of the idler roller body is 120-150mm.

[0012] The edge pressing roller device includes an edge pressing roller shaft, with edge pressing wheels installed at both ends of the edge pressing roller shaft. The head of the edge pressing roller shaft is mounted in a bearing seat through a bearing, and the bearing seat is fixed on the machine frame.

[0013] The beneficial effects of this invention are that the porous membrane micro-tension unwinding device innovatively adopts a combination of a magnetic hysteresis clutch and a servo motor in the mechanical structure for unwinding porous membranes. This results in a more compact structure, easier operation, and the ability to simultaneously meet the requirements of high-precision control and micro-tension unwinding. Both the unwinding shaft and the guide rollers in contact with the porous membrane are made of carbon fiber, minimizing roller mass and reducing friction. Attached Figure Description

[0014] Figure 1 This is the overall mechanical structure diagram of the present invention;

[0015] Figure 2 This is a structural diagram of the unwinding device;

[0016] Figure 3 This is a diagram of a lightweight guide roller mechanism;

[0017] Figure 4 This is a diagram of the flattening roller mechanism;

[0018] Figure 5 This is a diagram of the material support roller mechanism.

[0019] Figure 6 This is a diagram of the pressure roller mechanism;

[0020] Figure 7 This is a diagram of the adjustment device mechanism.

[0021] In the diagram, 1. Frame, 2. Unwinding device, 3. Porous film material, 4. Carbon fiber roller device, 5. Flattening roller device, 6. Base film, 7. Support roller device, 8. Edge pressing roller device, 9. Composite film, 10. Porous film material shaft, 11. Conical apex, 12. Hysteresis clutch, 13. Servo transmission device, 14. Adjustment device, 15. Carbon fiber roller body, 16. Flattening roller body, 17. Flattening roller adjustment handwheel, 18. Flattening roller transmission unit, 19. Support roller body, 20. Edge pressing roller shaft, 21. Edge pressing wheel, 22. Mother block, 23. Lead screw, 24. Handwheel, 25. Guide shaft. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] The porous membrane micro-tension unwinding device of the present invention has the following structure: Figure 1 As shown, the assembly includes an unwinding device 2, a carbon fiber roller device 4, a flattening roller device 5, a support roller device 7, and a pressing roller device 8, which are sequentially arranged on the frame 1 along the forward direction of the porous membrane material 3.

[0024] Combination Figure 2 , Figure 7 The unwinding device 2 includes a material shaft 10, with conical tops 11 at both ends. One conical top 11 is connected to an adjustment device 14. The adjustment device 14 has the following structure: it includes a handwheel 24, which is connected to a lead screw 23. A lead screw nut 22 at the end of the lead screw 23 is connected to the material shaft 10. The bottom of the lead screw nut 22 is connected to a guide shaft 25 and can slide on the guide shaft 25. Rotating the handwheel 24 can adjust the material shaft 10. The other conical top 11 is also connected to a hysteresis clutch 12, which is connected to a servo transmission device 13. The servo transmission device 13 includes a servo motor, whose input shaft is connected to a reducer, and whose output shaft is connected to the hysteresis clutch 12.

[0025] Combination Figure 3 The carbon fiber roller 4 includes a carbon fiber roller body 15, which is fixed to the frame 1 by bearing seats. The shaft ends of the carbon fiber roller body 15 are installed in bearings, which are installed in bearing seats. The carbon fiber roller body 15 of the carbon fiber roller 4 is made of lightweight carbon fiber.

[0026] Combination Figure 4The flattening roller device 5 includes a flattening roller body 16, which is fixed to the frame 1 by supports. Both ends of the flattening roller body 16 are fixedly mounted on the supports. The flattening roller body 16 is the driving roller. One end of the flattening roller body 16 is also connected to a flattening roller transmission device 18. The flattening roller transmission device 18 includes a motor. The input shaft of the motor is connected to a reducer. The output shaft of the reducer is connected to the flattening roller shaft head through a pulley and a synchronous belt. A flattening roller adjusting handwheel 17 is also provided at the end of the flattening roller body 16 connected to the flattening roller transmission device 18. The flattening roller body 16 of the flattening roller device 5 is a rubber strip type.

[0027] Combination Figure 5 The idler roller device 7 includes an idler roller body 19, which is fixed on the frame 1. The two ends of the idler roller body 19 are mounted in bearing seats through bearings, and the bearing seats are fixed on the frame 1. The diameter of the idler roller body 19 is 120-150mm.

[0028] Combination Figure 6 The edge pressing roller device 8 includes an edge pressing roller shaft 20, with edge pressing wheels 21 installed at both ends of the edge pressing roller shaft 20. The position of the edge pressing wheels 21 is adjustable. The shaft head of the edge pressing roller shaft 20 is installed in a bearing seat through a bearing, and the bearing seat is fixed on the frame 1.

[0029] The cone-top unwinding device installed on the frame 1 of this invention is driven by a servo motor with a hysteresis clutch. The cone top is used to fix the film, and the motor with a hysteresis clutch is used to control the tension of the film roll. A lightweight carbon fiber guide roller is installed below the film roll, and a flattening roller driven by a servo motor is set below the guide roller. A support roller device is installed behind the flattening roller for bonding the base film and the porous film at the support roller. A pressing roller device is installed behind the support roller to solve the problem of edge curling after bonding.

[0030] Figure 1This is a feeding method for unwinding porous membranes. The entire roll of porous membrane is mounted on a carbon fiber shaft 10. A conical apex 11 clamps and secures the roll on the shaft 10 according to the different widths of the membrane. After the membrane is installed, the width can be adjusted using an adjustment device 14. A servo drive device 13 is installed on the unwinding device 2, which is connected to a hysteresis clutch 12 via a coupling. Due to the high precision of the servo motor control and the high torque control precision of the hysteresis clutch 12, the unwinding tension of the porous membrane can be controlled under micro-tension conditions. After passing through the unwinding device 2, the porous membrane material 3 enters the carbon fiber roller device 4. Since the carbon fiber roller body 15 is made of lightweight carbon fiber, it is beneficial for the porous membrane to operate under micro-tension. The film passes through the flattening roller device 5, where the flattening roller body 16 is a rubber strip type, which is beneficial for effectively flattening the porous film. 17 is a flattening roller adjustment handwheel used to adjust the flattening degree of the film. The flattening roller is an active roller, powered by the flattening roller transmission device 18. Setting it to be active can effectively reduce the impact of the flattening roller on the tension of the film. The porous film 3 and the base film 6 are simultaneously wrapped on the support roller 7. The support roller body 19 has a diameter of 120-150mm, which can make the porous film and the base film adhere more fully. The laminated composite film 9 passes through the edge pressing roller device 8, which can effectively solve the problem of edge curling on both sides of the composite film 9. The edge pressing roller device 8 is equipped with an edge pressing roller shaft 20 and edge pressing wheels 21 on both sides to press the curled edges on both sides of the passing film.

Claims

1. A porous membrane microtension unwinding device, characterized by, The device comprises unwinding device (2), carbon fiber roller device (4), flattening roller device (5), supporting roller device (7), and edge roller device (8) arranged on the frame (1) in turn along the advancing direction of the porous film material (3). The unwinding device (2) comprises a material shaft (10), the two ends of which are provided with taper tops (11), one of which is further connected with an adjusting device (14), which comprises a hand wheel (24) connected with a screw rod (23), the end of which is connected with a material shaft (10) through a nut block (22), the bottom of which is connected with a guide shaft (25), the other taper top (11) is further connected with a hysteresis clutch (12), which is connected with a servo drive device (13), which comprises a servo motor, the output shaft of which is connected with a first speed reducer, the output shaft of which is connected with the hysteresis clutch (12). The flattening roller device (5) comprises a flattening roller body (16), which is fixed on the frame (1) through a support, and is fixedly installed at the two ends of the support, the flattening roller body (16) is a driving roller, one end of which is connected with a flattening roller transmission device (18), which comprises a motor, the output shaft of which is connected with a second speed reducer, the output shaft of which is connected with the flattening roller shaft head through a belt and a synchronous belt, the end of the flattening roller body (16) connected with the flattening roller transmission device (18) is further provided with a flattening roller adjusting hand wheel (17). The supporting roller device (7) comprises a supporting roller body (19), which is fixed on the frame (1), and the two end shaft heads of which are installed in the first bearing seat through bearings, and the first bearing seat is fixed on the frame (1), the roller body diameter of the supporting roller body (19) is 120-150mm. The edge roller device (8) comprises an edge roller shaft (20), the two ends of which are respectively provided with edge wheels (21), the shaft head of the edge roller shaft (20) is installed in the second bearing seat through bearings, and the second bearing seat is fixed on the frame (1). The carbon fiber roller device (4) comprises a carbon fiber roller body (15), which is fixed on the frame (1) through a third bearing seat, and the two end shaft heads of which are installed in bearings, and the bearings are installed in the third bearing seat. The carbon fiber roller body (15) of the carbon fiber roller device (4) is made of light carbon fiber material, and the flattening roller body (16) of the flattening roller device (5) is a rubber strip type.

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