Longitudinal stretching roller set for thin film

Abstract

The utility model discloses a film longitudinal stretching roller set which comprises a rack, a plurality of fixed stretching rollers, a plurality of lifting stretching rollers, a plurality of upper pressing rollers and a plurality of lower pressing rollers, the fixed stretching rollers, the lifting stretching rollers, the upper pressing rollers and the lower pressing rollers are installed at the upper end of the rack, the upper pressing rollers are arranged above the fixed stretching rollers, and the lower pressing rollers are arranged below the lifting stretching rollers. The fixed stretching roller and the lifting stretching roller are arranged on the same horizontal plane side by side, lifting assemblies are further arranged at the two ends of the upper pressing roller and the two ends of the lower pressing roller and used for driving the upper pressing roller and the lower pressing roller to move up and down, and lead screw lifters are arranged at the two ends of the lifting stretching roller and used for driving the upper pressing roller and the lower pressing roller to move up and down. And the lead screw lifter is used for synchronously driving the lifting stretching roller to move up and down. The longitudinal film stretching roller set is simple in structure and convenient to operate, solves the problems that due to the fact that the gap between the stretching rollers is small, film penetrating is difficult, and the film and the stretching rollers are not tightly attached, improves film stretching consistency, and effectively improves product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of film stretching, in particular to a film longitudinal stretching roller group. Background Art

[0002] In the lithium-ion battery separator industry, longitudinal stretching refers to the film being pulled and stretched in the longitudinal direction of the machine. In the prior art, longitudinal stretching generally uses an asynchronous stretching separator line, which mostly adopts a small gap multi-roller stretching structure design. The gap between the stretching rollers is small, and the film is not easy to pass through when passing through the film, and it is difficult to clean up the waste film and do cleaning work; in addition, during the operation of the equipment, it is not easy for the film to fit tightly with the stretching rollers, and in severe cases, it may even slip, resulting in insufficient stretching and film wrinkles, making the film stretching inconsistent and affecting the quality of the product.

[0003] Therefore, it is necessary to provide a film longitudinal stretching roller group to solve the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a film longitudinal stretching roller group with a simple structure and easy operation. It solves the problems of difficulty in film penetration caused by small gap between stretching rollers and loose fit between the film and stretching rollers, and also improves the consistency of film stretching, effectively improving product quality.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A film longitudinal stretching roller group comprises a frame and a plurality of fixed stretching rollers, a lifting stretching roller, an upper pressure roller and a lower pressure roller installed at the upper end of the frame, wherein the upper pressure roller is arranged above the fixed stretching roller, the lower pressure roller is arranged below the lifting stretching roller, the fixed stretching roller and the lifting stretching roller are arranged in parallel on the same horizontal plane, lifting components are further arranged at both ends of the upper pressure roller and the lower pressure roller, the lifting components are used to drive the upper pressure roller and the lower pressure roller to move up and down, and screw elevators are arranged at both ends of the lifting stretching roller, and the screw elevators are used to synchronously drive the lifting stretching roller to move up and down.

[0007] As a further improvement of the above technical solution, the fixed stretching roller and the lifting stretching roller both include a roller body, two rotating shafts and a motor. The two rotating shafts are fixedly connected to the two ends of the roller body. The motor is used to drive the rotating shaft to rotate. The two ends of the roller body of the fixed stretching roller are also provided with a first bearing seat. The first bearing seat is fixedly connected to the upper end of the frame, and the rotating shaft of the fixed stretching roller is rotatably connected to the first bearing seat.

[0008] As a further improvement of the above technical solution, a universal coupling is arranged between the motor 1 and the rotating shaft 1.

[0009] As a further improvement of the above technical solution, the lifting and stretching roller also includes two second bearing seats and a synchronous shaft. The rotating shaft of the lifting and stretching roller is rotatably connected to the second bearing seats. The lower end of the screw lift is connected to a rotating bearing, and the rotating bearing is fixedly connected to the upper end of the second bearing seat. The two ends of the synchronous shaft are respectively connected to the two screw lifts.

[0010] As a further improvement of the above technical solution, a guide rail and a sliding seat are further arranged between the first bearing seat and the second bearing seat, the guide rail is fixedly connected to the first bearing seat, the second bearing seat is installed on the sliding seat, and the sliding seat is used to drive the lifting and stretching roller to move up and down along the guide rail.

[0011] As a further improvement of the above technical solution, the screw lift includes a second motor, a mounting seat, a second coupling, a lift box and a transmission screw. The second motor is fixed to the upper end of the first bearing seat through the mounting seat. A worm and a worm wheel of an interlocking transmission are arranged in the lift box. The output end of the second motor is connected to the worm through the second coupling. Couplings are arranged at both ends of the synchronous shaft. The synchronous shaft is rotatably connected to the worm through the third coupling. The transmission screw is arranged perpendicular to the first roller body, and the upper end of the transmission screw is passed through the lift box and the mounting seat. The transmission screw is connected to the worm wheel, and the lower end of the transmission screw is connected to the rotating bearing.

[0012] As a further improvement of the above technical solution, the upper pressure roller and the lower pressure roller each include a roller body 2, two third bearing seats and a transmission gear, the two ends of the roller body 2 are respectively rotatably connected to the two third bearing seats, and the third bearing seats are connected to the lifting assembly, the transmission gear is arranged at one end of the roller body 2, and a driving gear is arranged at one end of the roller body 1, the driving gear is sleeved on the rotating shaft, and the transmission gear is meshed with the driving gear.

[0013] As a further improvement of the above technical solution, the lifting assembly includes a fixed plate, a linear guide, a slider, a cylinder and a cylinder fixed seat, the lifting assembly is fixedly connected to the frame or the first bearing seat through the fixed plate, the linear guide is fixed to the fixed plate, the slider is slidably connected to the linear guide, the bearing seat is fixedly connected to the slider, the cylinder is connected to one end of the fixed plate through the cylinder fixed plate, and the protruding end of the cylinder is connected to one end of the bearing seat, and the cylinder is used to drive the bearing seat to slide up and down along the linear guide.

[0014] As a further improvement of the above technical solution, a semicircular notch is provided at the upper end of the fixing plate connected to the frame, and the inner diameter of the semicircular notch is not less than the outer diameter of the rotating shaft.

[0015] As a further improvement of the above technical solution, a heating oil pipeline is arranged inside the roller body, and the end of the heating oil pipeline is connected to a heat-conducting joint.

[0016] The beneficial effects of the utility model are as follows: the utility model provides a stretching roller with a lift, and a lift assembly is provided on the pressure roller, and the distance between the stretching roller and the pressure roller is adjusted by the lift and the lift assembly, and the roller gap is enlarged in the non-working state to facilitate film penetration and facilitate operation and cleaning of the equipment, and a small gap is maintained in the working state to evenly stretch the film, effectively solving the problems of difficulty in film penetration due to the small gap between the stretching rollers and the loose fit between the film and the stretching roller, and at the same time ensuring that the film is evenly fitted to the roller surface, ensuring the consistency of film stretching, and effectively improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is a front view structural schematic diagram of a film longitudinal stretching roller group of the utility model;

[0019] Figure 2 It is a side view structural schematic diagram of the film longitudinal stretching roller group of the utility model;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of a film longitudinal stretching roller group of the utility model;

[0021] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 It is a structural schematic diagram of the fixed stretching roller of the utility model;

[0023] Figure 6 This is a structural schematic diagram of the lifting and stretching roller of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the upper pressing roller of the utility model;

[0025] Figure 8 It is a structural schematic diagram of the lower pressing roller of the utility model.

[0026] : 1. frame; 2. fixed stretching roller; 21. first bearing seat; 3. lifting stretching roller; 31. second bearing seat; 32. screw lift; 321. motor two; 322. mounting seat; 323. coupling two; 324. lift box; 325. transmission screw; 33. synchronous shaft; 34. coupling three; 35. rotating bearing; 231. roller body one; 232. rotating shaft; 233. driving gear; 234. motor one; 235. universal coupling; 4. upper pressure roller; 5. lower pressure roller; 451. roller body two; 452. transmission gear; 453. third bearing seat; 6. lifting assembly; 61. fixed plate; 611. semicircular notch; 62. linear guide; 63. slider; 64. cylinder; 65. cylinder fixing seat; 7. thermal conductive joint. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0028] Reference Figures 1 to 3A film longitudinal stretching roller group includes a frame 1 and a plurality of stretching rollers and a pressure roller, wherein the stretching roller includes a fixed stretching roller 2 and a lifting stretching roller 3, and the pressure roller includes an upper pressure roller 4 and a lower pressure roller 5. In this embodiment, eight stretching rollers are provided, and the eight stretching rollers are arranged in parallel on the same horizontal plane. The stretching rollers in the direction from the film inlet to the outlet are odd-numbered stretching rollers 2, and their positions do not change; the even-numbered stretching rollers are lifting stretching rollers 3, and screw lifts 32 are provided at both ends of the lifting stretching rollers 3. The screw lifts 32 are driven by a motor 2 321 to lift and lower, thereby synchronously driving the lifting stretching rollers to move up and down, which is beneficial to control the stretching rollers and The gap between the pressure rollers is more conducive to film penetration; at the same time, the upper pressure roller 4 is arranged above the fixed stretching roller 2, and the lower pressure roller 5 is arranged below the lifting and stretching roller 3, and the upper and lower pressure rollers 4 and 5 are also provided with lifting components 6 at both ends, and the lifting components 6 can drive the upper and lower pressure rollers 4 and 5 to move up and down. When penetrating the film, the lifting and stretching roller 3 and the lifting components 6 can be used to increase the gap between the rollers, so that the film can pass more easily, and it is also easier to clean the rollers; when working, the lifting and stretching rollers 3 and the lifting components 6 are controlled to make the roller body 1 231 and the roller body 2 451 evenly fit the film to ensure the consistency of the film thickness.

[0029] Reference Figure 5 , Figure 6 In an embodiment of the utility model, the fixed stretching roller 2 and the lifting stretching roller 3 both include a roller body 231, two rotating shafts 232, a driving gear 233, a motor 234 and a universal coupling 235. The two rotating shafts 232 are fixedly connected to the two ends of the roller body 231, and the motor 234 is fixedly connected to the rotating shaft 232 through the universal coupling 235, so that the motor 234 can drive the roller body 231 to rotate, ensuring that the film can pass smoothly; and since the lifting stretching roller 3 needs to be lifted and lowered, and the diameter of the roller body is small and the arrangement is tight, the universal coupling 235 is used to avoid the collision problem caused by the operation of each roller body, thereby ensuring the stable operation of the roller group; the driving gear 233 is arranged at one end of the roller body 231, and the driving gear 233 is sleeved on the rotating shaft 232. When the motor 234 drives the rotating shaft 232 to rotate, the driving gear 233 can drive the pressure roller to rotate.

[0030] Specifically, first bearing seats 21 are provided at both ends of the roller body 231 of the fixed stretching roller 2. The first bearing seats 21 are fixedly connected to the upper end of the frame 1 to fix the fixed stretching roller 2. The first bearing seats 21 are provided with bearings, which are sleeved on the rotating shaft 232 of the fixed stretching roller 2, so that the roller body of the fixed stretching roller 2 is rotatably connected to the first bearing seats 21 to ensure the normal rotation of the fixed stretching roller 2.

[0031] Reference Figure 6 In an embodiment of the utility model, the lifting and stretching roller 3 also includes two second bearing seats 31, two screw lifts 32 and a synchronous shaft 33. The rotating shaft 232 of the lifting and stretching roller 3 is rotatably connected to the second bearing seat 31, and a rotating bearing 35 is connected to the lower end of the screw lift 32. The rotating bearing 35 is fixedly connected to the upper end of the second bearing seat 31. When not in operation, the screw lift 32 can lift the lifting and stretching roller 3 to increase the roller gap, which is convenient for film penetration and also convenient for operation and cleaning of equipment; when in operation, the stretching roller is lowered to maintain a small gap to uniformly stretch the film; at the same time, the two ends of the synchronous shaft 33 are respectively connected to the two screw lifts 32 to ensure the synchronization of the lifting and lowering of the screw lifts 32 at both ends of the lifting and stretching roller 3.

[0032] In addition, a guide rail and a sliding seat are provided between the first bearing seat 21 and the second bearing seat 31. The guide rail is fixedly connected to the first bearing seat 21, and the second bearing seat 31 is installed on the sliding seat. The sliding seat is slidably connected to the guide rail. When the lifting and stretching roller 3 is lifted, the up and down movement of the lifting and stretching roller 3 can be guided by the guide rail and the sliding seat, thereby ensuring the stability of the lifting.

[0033] Specifically, the screw lift 32 includes a second motor 321, a mounting seat 322, a second coupling 323, a lift box 324 and a transmission screw 325. The second motor 321 is fixed to the upper end of the first bearing seat 21 through the mounting seat 322 to fix the lifting and stretching roller 3. At the same time, a worm and a worm wheel of a bite transmission are arranged in the lift box 324. The output end of the second motor 321 is connected to the worm through the second coupling 323, and the two ends of the synchronous shaft 33 are provided with a third coupling 34. The synchronous shaft 33 is rotatably connected to the worm through the third coupling 34, so that The motor 2 321 can drive the screw elevator 32 on the other side of the lifting and stretching roller 3 to synchronously lift the roller body 231 by driving the synchronous shaft 33, thereby ensuring the synchronization of lifting and lowering; the transmission screw 325 is arranged perpendicular to the roller body 231, and the upper end of the transmission screw 325 is passed through the elevator box 324 and the mounting seat 322, the transmission screw 325 is connected to the worm gear, and the lower end of the transmission screw 325 is connected to the rotating bearing 35, so that the motor 2 321 can drive the transmission screw 325 to rotate, thereby driving the roller body 231 connected below the transmission screw 325 to rise and fall.

[0034] Reference Figure 4 , Figure 7 , Figure 8In an embodiment of the utility model, the upper pressure roller 4 and the lower pressure roller 5 both include a roller body 451, a transmission gear 452 and two third bearing seats 453. The two ends of the roller body 451 are respectively rotatably connected to the two third bearing seats 453 to ensure that the roller body 451 can rotate normally; and the third bearing seats 453 are connected to the lifting assembly 6, so that the lifting assembly 6 can drive the pressure roller to rise and fall, thereby controlling the distance between the pressure roller and the stretching roller for film penetration and cleaning of the roller group; at the same time, the transmission gear 452 is arranged at one end of the roller body 451, and the transmission gear 452 is meshed with the driving gear 233 up and down, so that the stretching roller can drive the pressure roller to rotate at the same time, thereby ensuring the uniformity of film stretching.

[0035] Specifically, the lifting assembly 6 includes a fixed plate 61, a linear guide 62, a slider 63, a cylinder 64 and a cylinder fixing seat 65. The lifting assembly 6 is fixedly connected to the frame 1 or the first bearing seat 21 through the fixed plate 61. Since the lower pressure roller 5 is arranged below the lifting and stretching roller 3, in order to ensure the normal operation of the upper and lower rollers, a semicircular notch 611 is arranged at the upper end of the fixed plate 61 connected to the frame 1. The inner diameter of the semicircular notch 611 is not less than the outer diameter of the rotating shaft 232. On the one hand, it plays a evasive role for the rotating shaft 232 to ensure the normal rotation of the rotating shaft 232; on the other hand, while ensuring that the lifting assembly 6 drives the pressure roller to be lifted and lowered into place, the lifting assembly 6 and the frame 1 are more convenient to install and connect; the linear guide 62 is fixed on the fixed plate 61, and the slider 63 is slidably connected to the fixed plate 61. On the linear guide 62, the third bearing seat 453 is fixedly connected to the slider 63, and the cylinder 64 is connected to one end of the fixed plate 61 through the cylinder fixing seat 65. At the same time, the protruding end of the cylinder 64 is connected to one end of the third bearing seat 453, so that the cylinder 64 can be used to drive the third bearing seat 453 to slide up and down along the linear guide 62. When working, the cylinder 64 is extended, and the cylinder 64 can drive the pressure roller to press the film on the stretching roller to assist in bonding, and at the same time, it can also isolate the tension between the rollers; when not working, the cylinder 64 retracts to facilitate film penetration, film removal and cleaning; in addition, since the lifting components 6 at both ends of the pressure roller use independent cylinders, the synchronization of the lifting and lowering of the cylinders 64 at both ends must be guaranteed to be within 3mm, the purpose of which is to make the film fit evenly with the roller surface, ensure consistent film thickness and prevent the sheet from deviating.

[0036] Reference Figure 3 In an embodiment of the utility model, a heating oil pipeline is arranged inside the roller body 231, and a heat-conducting joint 7 is connected to the end of the heating oil pipeline. The heat-conducting joint 7 allows the heat-conducting fluid to flow into the heating oil pipeline to heat the film, thereby avoiding the film from being rapidly cooled during the stretching process and causing the film to rupture during stretching, which is beneficial to improving the consistency of the diaphragm stretching.

[0037] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A film longitudinal stretching roller set, characterized in that: It includes a frame and a plurality of fixed stretching rollers, a lifting stretching roller, an upper pressure roller and a lower pressure roller installed on the upper end of the frame, and the upper pressure roller is arranged above the fixed stretching roller, and the lower pressure roller is arranged below the lifting stretching roller, and the fixed stretching roller and the lifting stretching roller are arranged in parallel on the same horizontal plane, and lifting components are also arranged at both ends of the upper pressure roller and the lower pressure roller, and the lifting components are used to drive the upper pressure roller and the lower pressure roller to move up and down, and screw lifts are arranged at both ends of the lifting stretching roller, and the screw lifts are used to synchronously drive the lifting stretching roller to move up and down.

2. A film longitudinal stretching roller assembly according to claim 1, characterized in that: The fixed stretching roller and the lifting stretching roller each include a roller body, two rotating shafts and a motor. The two rotating shafts are fixedly connected to the two ends of the roller body. The motor is used to drive the rotating shaft to rotate. The two ends of the roller body of the fixed stretching roller are also provided with a first bearing seat. The first bearing seat is fixedly connected to the upper end of the frame, and the rotating shaft of the fixed stretching roller is rotatably connected to the first bearing seat.

3. A film longitudinal stretching roller assembly according to claim 2, characterized in that: A universal coupling is arranged between the motor 1 and the rotating shaft 1.

4. A film longitudinal stretching roller assembly according to claim 2, characterized in that: The lifting and stretching roller also includes two second bearing seats and a synchronous shaft. The rotating shaft of the lifting and stretching roller is rotatably connected to the second bearing seats. The lower end of the screw lift is connected to a rotating bearing, and the rotating bearing is fixedly connected to the upper end of the second bearing seat. The two ends of the synchronous shaft are respectively connected to the two screw lifts.

5. A film longitudinal stretching roller assembly according to claim 4, characterized in that: A guide rail and a sliding seat are also provided between the first bearing seat and the second bearing seat. The guide rail is fixedly connected to the first bearing seat, and the second bearing seat is installed on the sliding seat. The sliding seat is used to drive the lifting and stretching roller to move up and down along the guide rail.

6. A film longitudinal stretching roller assembly according to claim 4, characterized in that: The screw lift includes a second motor, a mounting seat, a second coupling, a lift box and a transmission screw. The second motor is fixed to the upper end of the first bearing seat through the mounting seat. A worm and a worm wheel of an interlocking transmission are arranged in the lift box. The output end of the second motor is connected to the worm through the second coupling. Couplings are arranged at both ends of the synchronous shaft. The synchronous shaft is rotatably connected to the worm through the third coupling. The transmission screw is arranged perpendicular to the first roller body, and the upper end of the transmission screw is passed through the lift box and the mounting seat. The transmission screw is connected to the worm wheel, and the lower end of the transmission screw is connected to the rotating bearing.

7. A film longitudinal stretching roller assembly according to claim 2, characterized in that: The upper pressure roller and the lower pressure roller each include a roller body 2, two third bearing seats and a transmission gear. The two ends of the roller body 2 are respectively rotatably connected to the two third bearing seats, and the third bearing seats are connected to the lifting assembly. The transmission gear is arranged at one end of the roller body 2, and a driving gear is arranged at one end of the roller body 1. The driving gear is sleeved on the rotating shaft, and the transmission gear is meshed with the driving gear.

8. A film longitudinal stretching roller assembly according to claim 2, characterized in that: The lifting assembly includes a fixed plate, a linear guide, a slider, a cylinder and a cylinder fixing seat. The lifting assembly is fixedly connected to the frame or the first bearing seat through the fixed plate, the linear guide is fixed to the fixed plate, the slider is slidably connected to the linear guide, the bearing seat is fixedly connected to the slider, the cylinder is connected to one end of the fixed plate through the cylinder fixing plate, and the protruding end of the cylinder is connected to one end of the bearing seat, and the cylinder is used to drive the bearing seat to slide up and down along the linear guide.

9. A film longitudinal stretching roller assembly according to claim 8, characterized in that: A semicircular notch is arranged at the upper end of the fixing plate connected to the frame, and the inner diameter of the semicircular notch is not less than the outer diameter of the rotating shaft.

10. A film longitudinal stretching roller assembly according to claim 2, characterized in that: A heating oil pipeline is arranged inside the roller body 1, and a heat-conducting joint is connected to the end of the heating oil pipeline.

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