Diaphragm unwinding device

Abstract

The diaphragm unwinding device comprises a back plate, an unwinding shaft mechanism, a tension control mechanism and a diaphragm temporary storage device are fixedly arranged on one side of the back plate, the tension control mechanism is located between the unwinding shaft mechanism and the diaphragm temporary storage device, and the back plate is further provided with a plurality of passing rollers; and the diaphragm swing roller mechanism is located on one side of the diaphragm temporary storage device, and the diaphragm swing roller mechanism comprises a plurality of rotating swing rollers for adjusting the tension of the diaphragm. By arranging the tension control mechanism, tension control can be conducted on a diaphragm unwound by the unwinding shaft mechanism, meanwhile, the diaphragm temporary storage device can temporarily store redundant diaphragms, wrinkles caused by looseness in the diaphragm unwinding process are reduced, the diaphragm swing roller mechanism can conduct secondary tension fine adjustment on the diaphragms output by the diaphragm temporary storage device, and the diaphragm unwinding efficiency is improved. According to the lamination device, the separation distance between the last-stage passing roller and the lamination table is increased, wrinkles and irregularity of the diaphragm lamination are prevented, and the technical problems that the separation distance between the last-stage passing roller and the lamination table is too large, the uncontrollable length is increased, and consequently the diaphragm lamination is wrinkled and irregularized in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a diaphragm unwinding device. Background Art

[0002] With the rapid development of green new energy industry, the lithium battery industry, as an important part of the new energy industry, is also constantly innovating and developing its R&D and production. In the production of lithium batteries, whether it is a stacking process or a winding process, the diaphragm is always one of the key components.

[0003] In the related art, in the high-speed cutting and stacking machine, a diaphragm unwinding device and a laminating device are generally provided. The diaphragm is unwound from the diaphragm unwinding device and moved to the laminating device, where the diaphragm and the pole piece are stacked. However, due to the increase in the laminating rate, some problems may occur when the diaphragm is unwound. For example, during the laminating process, the distance between the last-stage roller and the laminating table is too large, and the uncontrollable length increases, resulting in wrinkles and unevenness of the diaphragm lamination.

[0004] Therefore, it is necessary to design a new diaphragm unwinding device to overcome the above problems. Summary of the invention

[0005] The present application provides a diaphragm unwinding device, which can solve the technical problem in the related art that the distance between the last-stage roller and the stacking table is too large, the length increases uncontrollably, and the diaphragm stacks are wrinkled and uneven.

[0006] In the first aspect, an embodiment of the present application provides a diaphragm unwinding device, which includes: a back plate, on one side of which an unwinding shaft mechanism, a tension control mechanism and a diaphragm buffer device are fixedly provided, the tension control mechanism is located between the unwinding shaft mechanism and the diaphragm buffer device, and the back plate is also provided with a plurality of rollers; and a diaphragm swing roller mechanism, which is located on one side of the diaphragm buffer device, and the diaphragm swing roller mechanism includes a plurality of rotating swing rollers for adjusting the diaphragm tension.

[0007] In combination with the first aspect, in one embodiment, the diaphragm swing roller mechanism also includes: a fixed frame, the fixed frame is equipped with a first motor, and the plurality of rotating swing rollers are installed on the fixed frame, the first motor is connected to the rotating swing roller, and in a working state, the first motor can drive the plurality of rotating swing rollers to rotate as a whole in the same direction around the axis of the first motor; at least two first swing rollers, the first swing rollers are installed on the fixed frame, and along a moving direction perpendicular to the diaphragm, the axes of at least two of the first swing rollers are facing each other, and the axes of the plurality of rotating swing rollers are staggered.

[0008] In combination with the first aspect, in one embodiment, the diaphragm swing roller mechanism also includes at least two second swing rollers installed on the fixed frame, and the axes of at least two second swing rollers are opposite to each other along the moving direction perpendicular to the diaphragm; the second swing roller and the first swing roller are located on opposite sides of the rotating swing roller along the moving direction of the diaphragm, and the second swing roller is located between the rotating swing roller and the diaphragm buffer device.

[0009] In combination with the first aspect, in one embodiment, the tension control mechanism includes a second motor, the second motor is connected to a tension swing arm, and the tension swing arm is provided with a tension swing roller.

[0010] In combination with the first aspect, in one embodiment, the diaphragm cache device includes a linear motor, a cache fixed roller is installed on the linear motor, and a mover of the linear motor drives the cache fixed roller thereon to move along a straight line.

[0011] In combination with the first aspect, in one embodiment, the mover drives the cache fixed roller thereon to move up and down, and a first cylinder is also provided on one side of the linear motor, and the first cylinder is connected to the mover to balance the dead weight of the mover and the cache fixed roller on the mover.

[0012] In combination with the first aspect, in one embodiment, the diaphragm unwinding device further includes a diaphragm deviation correcting mechanism, and the diaphragm deviation correcting mechanism is installed on one side of the back plate to adjust the position of the back plate.

[0013] In combination with the first aspect, in one embodiment, the diaphragm correction mechanism includes: a linear guide rail, which is perpendicular to the back plate; a base plate, which is installed on the linear guide rail and fixed to the back plate, and is perpendicular to the back plate; a ball screw, which is installed on the base plate and a third motor is installed at one end of the ball screw.

[0014] In combination with the first aspect, in one embodiment, a static and magnetic removal mechanism and a dust removal mechanism are also fixedly provided on the back plate.

[0015] In combination with the first aspect, in one embodiment, a manual tape connection platform is also installed on the back plate, and the manual tape connection platform includes a second cylinder, and the second cylinder is connected to a tape connection pressure plate, and the second cylinder controls the tape connection pressure plate to press the diaphragm.

[0016] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0017] By setting up a tension control mechanism, the tension of the diaphragm unwound by the unwinding shaft mechanism can be controlled. At the same time, the diaphragm buffer device can cache redundant diaphragms to reduce wrinkles caused by relaxation during the diaphragm unwinding process, and the diaphragm swing roller mechanism can perform secondary tension fine-tuning on the diaphragm output by the diaphragm buffer device to prevent wrinkles and unevenness of the diaphragm stacking. This solves the technical problem in the related art that the distance between the last-stage roller and the stacking table is too large, the uncontrollable length increases, and the diaphragm stacking leads to wrinkles and unevenness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a diaphragm unwinding device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of the diaphragm swing roller mechanism provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a tension control mechanism provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of the diaphragm deviation correction mechanism provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of the unwinding shaft mechanism provided in an embodiment of the present application.

[0024] In the figure:

[0025] 1. Back plate; 11. Roller;

[0026] 2. Unwinding shaft mechanism; 21. Fourth motor; 22. Material roll roller; 23. Unwinding air expansion shaft;

[0027] 3. Tension control mechanism; 31. Second motor; 32. Tension swing arm; 33. Tension swing roller;

[0028] 4. Diaphragm buffer device; 41. Linear motor; 42. Buffer fixed roller; 43. First cylinder;

[0029] 5. Diaphragm swing roller mechanism; 51. Rotating swing roller; 52. Fixed frame; 53. First motor; 531. Output shaft; 532. Fixed block; 54. First swing roller; 55. Second swing roller; 56. Guide rod;

[0030] 6. Diaphragm deviation correction mechanism; 61. Linear guide rail; 62. Bottom plate; 63. Ball screw; 64. Third motor;

[0031] 7. Anti-static and anti-magnetic mechanism; 8. Dust removal mechanism;

[0032] 9. Manual belt connection platform; 91. Second cylinder; 92. Belt connection pressing plate; 93. Linear bearing;

[0033] 100. Diaphragm. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The embodiment of the present application provides a diaphragm unwinding device, which can solve the technical problem in the related art that the distance between the last-stage roller and the lamination table is too large, and the length increases uncontrollably, resulting in wrinkles and unevenness of the diaphragm laminations.

[0036] See also Figure 1 As shown, a diaphragm unwinding device provided in an embodiment of the present application may include: a back plate 1, a unwinding shaft mechanism 2, a tension control mechanism 3 and a diaphragm buffer device 4 are fixedly provided on one side of the back plate 1, the tension control mechanism 3 is located between the unwinding shaft mechanism 2 and the diaphragm buffer device 4, and the back plate 1 is also provided with a plurality of rollers 11, and the rollers 11 in this embodiment are all set as aluminum rollers; and a diaphragm swing roller mechanism 5, which is located on one side of the diaphragm buffer device 4, and the diaphragm swing roller mechanism 5 includes a plurality of rotating swing rollers 51 for adjusting the tension of the diaphragm 100.

[0037] In this embodiment, the back plate 1 is preferably in a vertical state, the unwinding shaft mechanism 2 is arranged on the front of the back plate 1, and the axis of the unwinding shaft mechanism 2 is perpendicular to the back plate 1, the diaphragm 100 is wound on the unwinding shaft mechanism 2, and the diaphragm 100 on the unwinding shaft mechanism 2 can pass through the tension control mechanism 3, the diaphragm buffer device 4 and the diaphragm swing roller mechanism 5 in sequence after unwinding, and finally arrive at the lamination device for lamination. The rotating swing roller 51 in this embodiment can not only rotate on its own, but also rotate around a certain axis to adjust the tension of the diaphragm 100.

[0038] This embodiment is capable of controlling the tension of the diaphragm 100 unwound by the unwinding shaft mechanism 2 by setting a tension control mechanism 3. At the same time, the diaphragm buffer device 4 can buffer redundant diaphragms 100 to reduce wrinkles caused by relaxation during the unwinding process of the diaphragm 100, and the diaphragm swing roller mechanism 5 can perform secondary tension fine-tuning on the diaphragm 100 output by the diaphragm buffer device 4 to prevent wrinkles and unevenness in the stacking of the diaphragm 100, thereby solving the technical problem in the related art that the distance between the last-stage roller 11 and the stacking table is too large, and the uncontrollable length increases, resulting in wrinkles and unevenness in the stacking of the diaphragm 100.

[0039] Further, see Figure 2 As shown, in one embodiment, the diaphragm swing roller mechanism 5 may further include: a fixed frame 52, the fixed frame 52 is equipped with a first motor 53, and a plurality of the rotating swing rollers 51 are installed on the fixed frame 52, the first motor 53 is connected to the rotating swing roller 51, and in a working state, the first motor 53 can drive the plurality of rotating swing rollers 51 to rotate in the same direction as a whole around the axis of the first motor 53; at least two first swing rollers 54, the first swing rollers 54 are installed on the fixed frame 52, and along a moving direction perpendicular to the diaphragm 100, the axes of at least two of the first swing rollers 54 are facing each other, and the axes of the plurality of rotating swing rollers 51 are staggered. In this embodiment, the first motor 53 is preferably a servo motor. The first motor 53 has an output shaft 531, and preferably two rotating swing rollers 51 are provided. The output shaft 531 of the first motor 53 is fixed with a fixed block 532, and the two rotating swing rollers 51 are both installed on the fixed block 532, so that when the output shaft 531 of the first motor 53 rotates, it can drive the two rotating swing rollers 51 to rotate in the same direction around the axis of the first motor 53 at the same time to control the tension of the diaphragm 100, wherein the diaphragm 100 passes between the two rotating swing rollers 51. The diaphragm swing roller mechanism 5 in this embodiment is also installed on the driving motor, and the mover of the driving motor can drive the diaphragm swing roller mechanism 5 to move left and right as a whole. It is also preferred to set two first swing rollers 54, the two first swing rollers 54 are located below the two rotating swing rollers 51, the axes of the two first swing rollers 54 are located in the same horizontal plane, and the axes of the two rotating swing rollers 51 are located in different horizontal planes. The first swing roller 54 can rotate around its axis under the pull of the diaphragm 100. In other embodiments, more than two first swing rollers 54 and rotating swing rollers 51 may be provided. In this embodiment, the first swing roller 54 is used to guide the membrane 100 pulled down from the two rotating swing rollers 51, so that the membrane 100 can be smoothly and stably transported to the lamination table, reducing membrane wrinkles.

[0040] Further, see Figure 1 and Figure 2As shown, in some embodiments, the diaphragm swing roller mechanism 5 may further include at least two second swing rollers 55 mounted on the fixed frame 52, and the axes of at least two second swing rollers 55 are opposite to each other along the moving direction perpendicular to the diaphragm 100; the second swing roller 55 and the first swing roller 54 are located on opposite sides of the rotating swing roller 51 along the moving direction of the diaphragm 100, and the second swing roller 55 is located between the rotating swing roller 51 and the diaphragm buffer device 4. In this embodiment, the second swing roller 55 is located above the rotating swing roller 51, and two second swing rollers 55 are preferably provided, the axes of the two second swing rollers 55 are located in the same horizontal plane, and the diaphragm 100 passes between the two second swing rollers 55. The two second swing rollers 55 are used to guide the diaphragm 100 conveyed from the diaphragm buffer device 4 to the rotating swing roller 51 for secondary tensioning fine-tuning, thereby reducing the uncontrollable length from the last stage of the diaphragm buffer device 4 to the stacking table, and improving the stacking precision alignment; the diaphragm 100 output from the diaphragm buffer device 4 first passes through the second swing roller 55, then passes through the rotating swing roller 51, and finally passes through the first swing roller 54 for output.

[0041] In some optional embodiments, two guide rods 56 may be further provided between the rotating swing roller 51 and the first swing roller 54 , and the diaphragm 100 passes between the two guide rods 56 , and the guide rods 56 may guide the diaphragm 100 .

[0042] In the related art, during the unwinding process, due to incomplete static electricity removal of the diaphragm 100, the tension control mechanism 3 and the diaphragm buffer mechanism do not respond in time, which may cause the diaphragm 100 to become loose, thereby generating wrinkles and uneven lamination of the diaphragm 100.

[0043] In order to solve the problem that the tension control mechanism 3 does not respond in time, see Figure 3 As shown, in one embodiment, the tension control mechanism 3 includes a second motor 31, the second motor 31 is connected to a tension swing arm 32, and a tension swing roller 33 is provided on the tension swing arm 32. In this embodiment, the second motor 31 is preferably a servo motor, which is installed on the rear side of the back plate 1, controls the tension swing arm 32 to rotate slightly, and drives the tension swing roller 33 to rotate. The servo motor is used to realize the tension control of the diaphragm 100, which can respond in time and is not easy to cause the diaphragm 100 to relax.

[0044] In order to solve the problem of untimely response of the diaphragm buffer mechanism in the related art, see Figure 1As shown, in some embodiments, the diaphragm buffer device 4 includes a linear motor 41, on which a buffer fixed roller 42 is installed, and the mover of the linear motor 41 drives the buffer fixed roller 42 thereon to move along a straight line. The linear motor 41 in this embodiment adopts a high-speed linear motor 41, and the mover in the linear motor 41 moves up and down at high speed along the slide rail, driving the buffer fixed roller 42 on the mover to move up and down, realizing the buffering function, and working in conjunction with the tension control mechanism 3 to recycle the buffered redundant diaphragms 100.

[0045] In the related art, when the membrane unwinding shaft changes from unwinding to winding or from winding to unwinding, the time is short and the kinetic energy is large, and the membrane 100 is easy to break. However, the membrane buffer device 4 added in this embodiment can buffer and release the membrane 100 in time, reducing the risk of the membrane 100 breaking.

[0046] Further, see Figure 1 As shown, in one embodiment, the mover drives the cache fixed roller 42 thereon to move up and down, and a first cylinder 43 is further provided on one side of the linear motor 41, and the first cylinder 43 is connected to the mover to balance the deadweight of the mover and the cache fixed roller 42 on the mover. In this embodiment, the first cylinder 43 is arranged on the right side of the linear motor 41, and the piston rod in the first cylinder 43 is connected to the mover, which can balance the deadweight of the rice dumpling and the cache fixed roller 42.

[0047] Further, see Figure 4 As shown, in some optional embodiments, the membrane unwinding device may further include a membrane deviation correction mechanism 6, which is installed on one side of the back plate 1 to adjust the position of the back plate 1. The membrane deviation correction mechanism 6 in this embodiment can move the position of the back plate 1 to adjust the position of the membrane 100 when the membrane 100 deviates, for example, drive the back plate 1 to move in a direction perpendicular to the back plate 1 to perform a deviation correction movement on the membrane 100.

[0048] Based on the above technical solution, see Figure 4 As shown, in one embodiment, the diaphragm deviation correction mechanism 6 includes: a linear guide 61, the linear guide 61 is perpendicular to the back plate 1; a bottom plate 62, the bottom plate 62 is mounted on the linear guide 61, and the bottom plate 62 is fixed to the back plate 1, and the bottom plate 62 is perpendicular to the back plate 1; a ball screw 63, the ball screw 63 is mounted on the bottom plate 62, and a third motor 64 is installed at one end of the ball screw 63. In this embodiment, the third motor 64 is preferably a servo motor, and the third motor 64 can drive the ball screw 63 to rotate around its axis, and then push the bottom plate 62 on the linear guide 61 through the ball screw 63 to perform a deviation correction movement of the diaphragm 100 perpendicular to the direction of the back plate 1, and the bottom plate 62 drives the back plate 1 to move synchronously.

[0049] In order to solve the problem that the diaphragm 100 is not completely free of static electricity, see Figure 1 As shown, in one embodiment, the back plate 1 is also provided with a static and magnetic removal mechanism 7 and a dust removal mechanism 8. In this embodiment, two static and magnetic removal mechanisms 7 and two dust removal mechanisms 8 are provided on the back plate 1, one static and magnetic removal mechanism 7 and one dust removal mechanism 8 are located on the front of the diaphragm 100, and one static and magnetic removal mechanism 7 and one dust removal mechanism 8 are located on the back of the diaphragm 100. The static and magnetic removal mechanism 7 located on the front of the diaphragm 100 can remove static and magnetic forces on the front of the diaphragm 100, and the static and magnetic removal mechanism 7 located on the back of the diaphragm 100 can remove static and magnetic forces on the back of the diaphragm 100; the dust removal mechanism 8 located on the front of the diaphragm 100 can absorb and remove dust on the front of the diaphragm 100, and the dust removal mechanism 8 located on the back of the diaphragm 100 can absorb and remove dust on the back of the diaphragm 100. In this embodiment, the static and magnetic removal mechanism 7 and the dust removal mechanism 8 are added to reduce the pollution and wrinkles of the diaphragm 100, thereby improving the unwinding quality and battery performance.

[0050] Further, see Figure 1 As shown, in one embodiment, a manual splicing platform 9 may also be installed on the back plate 1 , and the manual splicing platform 9 includes a second cylinder 91 , and the second cylinder 91 is connected to a splicing pressure plate 92 , and the second cylinder 91 controls the splicing pressure plate 92 to press the diaphragm 100 . In this embodiment, a linear bearing 93 is installed inside the manual splicing platform 9, and the second cylinder 91 is connected to the splicing pressure plate 92 through a connecting rod, and the movement of the splicing pressure plate 92 is controlled by the connecting rod. The connecting rod is sleeved in the linear bearing 93 and connected to the splicing pressure plate 92. The linear bearing 93 is used to support and guide the connecting rod, thereby reducing the wear of the connecting rod during the pushing process of the second cylinder 91 and improving the accuracy and efficiency of the process of splicing the diaphragm 100; the manual splicing platform 9 is used to continue splicing the diaphragm 100 when replacing the diaphragm material roll; the first-stage roller 11 of the diaphragm 100 unwinding configured on the manual splicing platform 9 is a flattening aluminum roller, which can effectively avoid wrinkles during the unwinding process, and the roller 11 between the tension control mechanism 3 and the diaphragm buffer device 4 is also set as a flattening roller.

[0051] Preferably, see Figure 5 As shown, the unwinding shaft mechanism 2 in this embodiment includes a fourth motor 21, a material roll roller 22 and an unwinding air-inflating shaft 23, wherein the fourth motor 21 is preferably a servo motor, and the material roll roller 22 is driven by the fourth motor 21 to rotate the unwinding air-inflating shaft 23, thereby performing rotational unwinding and rewinding.

[0052] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A diaphragm unwinding device, characterized in that: It includes: A back plate (1), wherein a reeling shaft mechanism (2), a tension control mechanism (3) and a membrane buffer device (4) are fixedly provided on one side of the back plate (1), wherein the tension control mechanism (3) is located between the reeling shaft mechanism (2) and the membrane buffer device (4), and the back plate (1) is also provided with a plurality of rollers (11); And a diaphragm swing roller mechanism (5), which is located on one side of the diaphragm buffer device (4), and the diaphragm swing roller mechanism (5) comprises a plurality of rotating swing rollers (51) for adjusting the tension of the diaphragm.

2. The diaphragm unwinding device according to claim 1, characterized in that: The diaphragm swing roller mechanism (5) further comprises: A fixed frame (52), the fixed frame (52) being equipped with a first motor (53), and the plurality of rotating swing rollers (51) being equipped on the fixed frame (52), the first motor (53) being connected to the rotating swing rollers (51), and in a working state, the first motor (53) can drive the plurality of rotating swing rollers (51) to rotate as a whole around an axis of the first motor (53) in the same direction; At least two first swing rollers (54) are installed on the fixed frame (52), and along a moving direction perpendicular to the diaphragm, the axes of at least two of the first swing rollers (54) are directly opposite, and the axes of the plurality of rotating swing rollers (51) are staggered.

3. The diaphragm unwinding device according to claim 2, characterized in that: The diaphragm swing roller mechanism (5) further comprises at least two second swing rollers (55) mounted on the fixed frame (52), wherein the axes of the at least two second swing rollers (55) are directly opposite to each other along a moving direction perpendicular to the diaphragm; The second swing roller (55) and the first swing roller (54) are located on opposite sides of the rotating swing roller (51) along the moving direction of the diaphragm, and the second swing roller (55) is located between the rotating swing roller (51) and the diaphragm buffer device (4).

4. The diaphragm unwinding device according to claim 1, characterized in that: The tension control mechanism (3) comprises a second motor (31), the second motor (31) is connected to a tension swing arm (32), and a tension swing roller (33) is provided on the tension swing arm (32).

5. The diaphragm unwinding device according to claim 1, characterized in that: The diaphragm buffer device (4) comprises a linear motor (41), a buffer fixed roller (42) is mounted on the linear motor (41), and a mover of the linear motor (41) drives the buffer fixed roller (42) thereon to move along a straight line.

6. The diaphragm unwinding device according to claim 5, characterized in that: The mover drives the cache fixed roller (42) thereon to move up and down, and a first cylinder (43) is also provided on one side of the linear motor (41), and the first cylinder (43) is connected to the mover to balance the deadweight of the mover and the cache fixed roller (42) on the mover.

7. The diaphragm unwinding device according to claim 1, characterized in that: The diaphragm unwinding device further comprises a diaphragm deviation correcting mechanism (6), wherein the diaphragm deviation correcting mechanism (6) is installed on one side of the back plate (1) to adjust the position of the back plate (1).

8. The membrane unwinding device according to claim 7, characterized in that: The diaphragm deviation correction mechanism (6) comprises: A linear guide rail (61), wherein the linear guide rail (61) is perpendicular to the back plate (1); A bottom plate (62), the bottom plate (62) being mounted on the linear guide rail (61), and the bottom plate (62) being fixed to the back plate (1), and the bottom plate (62) being perpendicular to the back plate (1); A ball screw (63), wherein the ball screw (63) is mounted on the base plate (62), and a third motor (64) is mounted on one end of the ball screw (63).

9. The diaphragm unwinding device according to claim 1, characterized in that: The back plate (1) is also provided with a static and magnetic removal mechanism (7) and a dust removal mechanism (8).

10. The diaphragm unwinding device according to claim 1, characterized in that: A manual tape connection platform (9) is also installed on the back plate (1), and the manual tape connection platform (9) includes a second cylinder (91). The second cylinder (91) is connected to a tape connection pressure plate (92), and the second cylinder (91) controls the tape connection pressure plate (92) to press the diaphragm.

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