Diaphragm unwinding equipment

Abstract

The utility model relates to the technical field of battery cell diaphragm conveying, and discloses diaphragm unwinding equipment which comprises a rack, and an unwinding mechanism, a belt connecting platform mechanism, a tension detection mechanism, a tension swing rod mechanism and a cache mechanism are sequentially arranged on the rack along a diaphragm belt conveying path. The tape splicing platform mechanism, the tension detection mechanism and the tension swing rod mechanism are wound around the unwinding mechanism, and the cache mechanism is located below the tension swing rod mechanism; the belt connecting platform mechanism, the tension detecting mechanism, the tension swing rod mechanism and the buffering mechanism are provided with a plurality of diaphragm passing rollers used for diaphragm transmission, and the diameter of each diaphragm passing roller is 20-30 mm. According to the diaphragm unwinding equipment, the position of each mechanism and the diameter of the diaphragm passing roller are adjusted, so that the path of a diaphragm belt is shortened, the overall structure is simplified, the diaphragm unwinding quality is improved, and the structural cost of the diaphragm unwinding equipment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery core diaphragm transportation, and particularly relates to a diaphragm unwinding device. Background Art

[0002] The battery cell production process includes lamination, where the positive electrode, negative electrode, and separator are stacked in a Z-shape. The quality of the final cell is crucial to the success of the stack. The separator, a key component of a stacked cell, separates the positive and negative electrodes to prevent short circuits. Therefore, during the unwinding process, the separator must be free of wrinkles, looseness, or displacement to ensure the quality of the stacked cell.

[0003] Current diaphragm unwinding equipment features several components to balance conveying the diaphragm and addressing issues such as wrinkles, static electricity, and dust during unwinding. Conveyor rollers are also installed between the various components to transport the diaphragm. Consequently, current diaphragm unwinding equipment suffers from an excessive number of conveyor rollers. As the number of conveyor rollers increases, the accuracy of each roller's parallelism, roller cylindricity, and mounting plate parallelism becomes increasingly difficult to control. This increases the likelihood of residual static electricity between the diaphragm and the drive rollers, and the diaphragm is more prone to uneven tape movement. This leads to increased wrinkling and sagging of the diaphragm during unwinding, resulting in diaphragm position shifting or static electricity breakdown, ultimately resulting in a large number of defective battery cells.

[0004] In order to solve the above problems, how to provide a diaphragm unwinding device that improves the quality of lamination and reduces the structural cost is an urgent problem to be solved by people in the relevant technical field. Utility Model Content

[0005] In order to solve the shortcomings of the existing technology, the utility model provides a diaphragm unwinding device, which optimizes the positions of different mechanisms and the diameter of the diaphragm roller by adjusting the diaphragm unwinding device to achieve the simplification of the overall structure of the device, thereby improving the quality of diaphragm unwinding and reducing the structural cost of the diaphragm unwinding device.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] The utility model provides a diaphragm unwinding device, comprising a frame, on which the following components are sequentially provided along the diaphragm tape path:

[0008] Unwinding mechanism, used for unwinding and recycling diaphragm rolls;

[0009] Splicing platform mechanism, used for splicing different diaphragm rolls;

[0010] Tension detection mechanism, used to detect the tension of the diaphragm during the tape running process;

[0011] A tension rocker mechanism for adjusting the tension of the diaphragm during tape travel; and

[0012] a buffer mechanism for storing or releasing the diaphragm;

[0013] The tape splicing platform mechanism, the tension detection mechanism and the tension swing lever mechanism are arranged around the unwinding mechanism, and the buffer mechanism is located below the tension swing lever mechanism;

[0014] The belt connection platform mechanism, the tension detection mechanism, the tension rocker mechanism and the buffer mechanism are provided with a plurality of diaphragm rollers for diaphragm transmission, and the diameter of the diaphragm rollers is 20-30 mm.

[0015] Preferably, the diameter of the diaphragm roller is 26 mm.

[0016] Preferably, the surface of the diaphragm roller is provided with a ceramic layer.

[0017] Preferably, a flattening roller is provided between the unwinding mechanism and the tape splicing platform, and the flattening roller is provided with a thread line for preventing wrinkles from occurring on the diaphragm.

[0018] Preferably, the frame is further provided with a winding diameter detection mechanism close to the unwinding mechanism.

[0019] Preferably, the frame is also provided with an iron removal mechanism.

[0020] Preferably, the iron removal mechanism includes a first iron removal component, a second iron removal component and a third iron removal component. The diaphragm is wound around the first iron removal component and the second iron removal component in sequence and then wound around the tension rocker mechanism. The third iron removal component is arranged between the tension rocker mechanism and the cache mechanism.

[0021] Preferably, a diaphragm pressing mechanism is further provided between the tension rocker mechanism and the cache mechanism, and the diaphragm pressing mechanism cooperates with the cache mechanism to control the storage or release of the diaphragm.

[0022] Preferably, the frame is provided with a static electricity removal mechanism and / or a deviation correction mechanism.

[0023] Preferably, the tape splicing platform mechanism is located on one side of the unwinding mechanism, the tension swing arm mechanism is located on the other side opposite to the unwinding mechanism, the buffer mechanism is located below the tension swing arm mechanism, and the buffer mechanism is closer to the unwinding mechanism relative to the tension swing arm mechanism;

[0024] The diaphragm is unwound by the unwinding mechanism and passes through the tape connection platform mechanism, the tension detection mechanism, the tension rocker mechanism and the buffer mechanism in sequence.

[0025] In summary, the present invention has at least the following advantages:

[0026] The utility model provides a diaphragm unwinding device, which shortens the diaphragm tape path by optimizing the positions of various mechanisms in the diaphragm unwinding device and the diameter of the roller, thereby improving the quality of the battery cell stacking and reducing the structural cost. Specifically, the tape connection platform mechanism, the tension detection mechanism and the tension swing mechanism are arranged around the unwinding mechanism, and the buffer mechanism is located below the tension swing mechanism, which further makes the various mechanisms of the diaphragm unwinding device more compact, which is conducive to reducing the number of rollers and reducing the cost of the equipment. The reduction of rollers can avoid the change of tension of the diaphragm due to excessive tape running, and at the same time reduce the loss caused by friction between the diaphragm and the roller, improve production efficiency and reduce maintenance costs. Compared with the traditional transmission roller with a diameter of 30-40mm, the utility model adopts a small diameter diaphragm roller of 20-30mm, which makes the weight of the diaphragm roller lighter, reduces the torque required for the diaphragm tape running, and improves the smoothness of the diaphragm tape running. Combined with the shortening of the diaphragm tape path, it can avoid the situation of unstable diaphragm tension control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is one of the overall structural schematic diagrams of the diaphragm unwinding device of Example 1 of the present utility model.

[0028] Figure 2 This is the second schematic diagram of the overall structure of the diaphragm unwinding device of Example 1 of the present utility model.

[0029] Figure 3 This is a simplified schematic diagram of the structure of the diaphragm tape transport in Example 1 of the present invention.

[0030] Figure 4 This is a structural diagram of the unwinding mechanism of Example 1 of the present utility model.

[0031] Figure 5 This is a structural schematic diagram of the belt splicing platform mechanism of Example 1 of the present utility model.

[0032] Figure 6 This is a schematic diagram of the overall structure of the cache mechanism of Example 1 of the present utility model.

[0033] Figure 7 This is a schematic diagram of the overall structure of the diaphragm unwinding device of Example 2 of the present utility model.

[0034] Figure 8 This is a simplified schematic diagram of the structure of the diaphragm tape transport in Example 2 of the present utility model.

[0035] Figure 9 This is a schematic diagram of the overall structure of the diaphragm unwinding device of Example 3 of the present utility model.

[0036] Markings in the figure:

[0037] 100, frame; 10, diaphragm roller; 11, flattening roller; 1, unwinding mechanism; 101, first motor; 102, air shaft;

[0038] 20. Roll diameter detection mechanism; 2. Tape splicing platform mechanism; 201. Tape splicing panel; 202. Diaphragm edge pressing; 203. Roller limiting unit;

[0039] 3. Tension detection mechanism;

[0040] 4. Tension rocker mechanism;

[0041] 5. Cache mechanism; 51. Second motor;

[0042] 6. Anti-static mechanism;

[0043] 71. First iron removal assembly; 72. Second iron removal assembly; 73. Third iron removal assembly;

[0044] 8. Correction mechanism;

[0045] 9. Press the diaphragm mechanism. DETAILED DESCRIPTION

[0046] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0047] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0050] Example 1:

[0051] Please see the attached Figure 1-6 This embodiment provides a diaphragm unwinding device, which simplifies the overall structure of the diaphragm unwinding device by adjusting the positions of various mechanisms and the diameter of the diaphragm roller, improves the quality of diaphragm unwinding and reduces the structural cost of the diaphragm unwinding device.

[0052] Specifically, the membrane unwinding device includes a frame 100. Frame 100 is equipped with an unwinding mechanism 1, a tape splicing platform mechanism 2, a tension detection mechanism 3, a tension swing lever mechanism 4, and a buffer mechanism 5. The unwinding mechanism 1 is used to place the membrane roll and perform both recovery and unwinding functions. Figure 4 The unwinding mechanism 1 is schematically illustrated. It includes a first motor 101 and an air shaft 102 connected to the first motor 101. The first motor 101 is a servo motor that drives the air shaft 102 in both forward and reverse rotations. The diaphragm roll is placed on the air shaft 102, allowing the roll to be reeled or unwound as the air shaft 102 rotates. Furthermore, the first motor 101 can be connected to a speed reducer that works in conjunction with the first motor 101 to precisely adjust the speed of unwinding or rewinding the roll.

[0053] The diaphragm released by the unwinding mechanism 1 passes through the tape platform mechanism 2, the tension detection mechanism 3, the tension swing rod mechanism 4 and the buffer mechanism 5 in sequence. Figure 5 As shown, the tape splicing platform mechanism 2 includes a tape splicing panel 201. Two membrane pressure edges 202 are provided on the side of the tape splicing panel 201 away from the unwinding mechanism 1. Roller limiting portions 203 are also provided on opposite sides of the tape splicing panel 201. The roller limiting portions 203 are used to connect to a membrane roller 10 parallel to the membrane pressure edges 202. After the membrane is wound around the outside of the membrane roller 10 near the unwinding mechanism 1 in the tape splicing platform mechanism 2, it passes through the tape splicing panel 201 and passes between the tape splicing panel 201 and the membrane pressure edges 202. It is then wound to the outside of another membrane roller 10 of the tape splicing platform mechanism 2 and then connected to the tension detection mechanism 3. Different membrane pressure edges 202 can be used to respectively compress the spare membrane and the membrane in use, so as to facilitate the fixation and splicing of the membranes of different membrane rolls.

[0054] The tension detection mechanism 3 is located above the unwinding mechanism 1 and is similarly equipped with a membrane roller 10 parallel to the inflatable shaft 102. The membrane, after passing through the splicing platform mechanism 2, is wound onto the membrane roller 10 of the tension detection mechanism 3. Furthermore, the membrane roller 10 of the tension detection mechanism 3 is also connected to a tension sensor. This tension sensor measures the tension of the membrane as it passes through the tension detection mechanism 3, enabling other mechanisms, such as the tension rocker mechanism 4, to adjust the membrane's running state in real time, thereby improving the membrane's running quality.

[0055] The tension swing mechanism 4 includes two membrane rollers 10 parallel to the inflatable shaft 102. The membrane passing through the tension detection mechanism 3 is sequentially wound around the membrane rollers 10 at the tension swing mechanism 4. Specifically, Figure 3 A simplified schematic diagram of the diaphragm tape transport of this embodiment is given. Figure 3 The relative positions of the membrane rollers 10 of each mechanism and the path of the membrane tape are described in simplified form. Figure 3 As shown, when passing through the tension swing arm mechanism 4, the diaphragm first passes under the diaphragm roller 10 near the tension detection mechanism 3 and is connected to the diaphragm roller 10 at its outer surface. The diaphragm then passes over another diaphragm roller 10 and is connected to the diaphragm roller 10 at its inner surface. It should be noted that the outer surface of the diaphragm here refers to the surface of the diaphragm away from the center of the diaphragm roll, and the inner surface of the diaphragm refers to the surface of the diaphragm near the center of the diaphragm roll.

[0056] Therefore, as the two diaphragm rollers 10 of the tension swing mechanism 4 rotate, the tension of the diaphragm wound on the tension swing mechanism 4 is reduced or increased. The tension swing mechanism 4 is equipped with a tension controller and a sensor for measuring the diaphragm tension in real time. Based on the tension data fed back by the sensor, the tension controller adjusts the rotation angle of the diaphragm rollers 10 in the tension swing mechanism 4 to adjust the tension of the diaphragm in real time, thereby preventing the diaphragm from stretching and deforming due to excessive tension or from loosening and wrinkling due to insufficient tension.

[0057] Figure 6 The schematic diagram of the structure of the buffer mechanism 5 is given. The diaphragm passes through the tension rocker mechanism 4 and is transported to the buffer mechanism 5. The buffer mechanism 5 is provided with a second motor 51 and a diaphragm roller 10 connected to the second motor 51. The diaphragm passes through the diaphragm roller 10 of the buffer mechanism 5 and moves on the horizontal plane driven by the diaphragm roller 10 as the motor drives the diaphragm roller 10, thereby achieving the buffering effect of the diaphragm. Figure 1 、 Figure 3 and Figure 5 The buffer mechanism 5 is entirely located below the tension rocker mechanism 4 and extends toward the unwinding mechanism 1. Compared to extending away from the unwinding mechanism 1, extending the buffer mechanism 5 toward the unwinding mechanism 1 can further improve the space utilization of the diaphragm unwinding device and make the overall structure more streamlined.

[0058] Please refer to Figure 1 and Figure 3 In this embodiment, the splicing platform mechanism 2 is provided on one side of the unwinding mechanism 1, and the tension swing arm mechanism 4 is provided on the other side of the unwinding mechanism 1. The splicing platform mechanism 2, the tension detection mechanism 3, and the tension swing arm mechanism 4 are integrally arranged around the unwinding mechanism 1, close to the unwinding mechanism 1. This helps to reduce the number of rollers connected between different mechanisms, and can also avoid the diaphragm roll, effectively shortening the distance of the diaphragm running, avoiding the impact of the diaphragm quality due to excessive running. At the same time, it can also reduce the friction loss generated between the diaphragm and the roller, improve production efficiency, reduce maintenance costs, and make the diaphragm running more stable. In addition, the diameter of the diaphragm roller 10 provided in each mechanism is 20-30 mm to reduce the weight of the diaphragm roller 10, thereby reducing the torque required for the diaphragm running, making the diaphragm running smoother, and avoiding unstable diaphragm tension control.

[0059] In this embodiment, the diameter of the diaphragm roller 10 is preferably 26 mm.

[0060] Furthermore, the surface of the diaphragm roller 10 may be provided with a ceramic layer. The ceramic coating on the surface of the diaphragm roller 10 increases wear resistance and smoothness, which helps reduce diaphragm damage. It also reduces static electricity generated between the diaphragm roller 10 and the diaphragm, reducing the possibility of diaphragm perforation due to static electricity, and further preventing short circuits in the battery cell stack.

[0061] In order to further improve the quality of diaphragm unwinding, the diaphragm unwinding equipment can also be provided with an iron removal mechanism. In this embodiment, the iron removal mechanism includes a first iron removal component 71, a second iron removal component 72 and a third iron removal component 73. The diaphragm that has passed through the tension detection mechanism 3 is wound around the first iron removal component 71 and the second iron removal component 72 and then conveyed to the tension rocker mechanism 4 to achieve the effect of double iron removal. The third iron removal component 73 is arranged between the tension rocker mechanism 4 and the cache mechanism 5. The first iron removal component 71, the second iron removal component 72 and the third iron removal component 73 are all provided with a diaphragm roller 10. The diaphragm rollers 10 of the first iron removal component 71 and the second iron removal component 72 are in contact with the outer surface of the diaphragm, and the diaphragm rollers 10 of the third iron removal component 73 are in contact with the inner surface of the diaphragm, which can achieve iron removal on both sides of the diaphragm surface, fully remove impurities on the diaphragm surface, and help improve the quality of subsequent battery cell stacking.

[0062] In addition, to reduce the occurrence of diaphragm wrinkles during the tape run, the frame 100 is also equipped with a static electricity removal mechanism 6. The static electricity removal mechanism 6 is located near the tape run path of the diaphragm to remove static electricity from the diaphragm during the tape run in real time, preventing the diaphragm from being perforated due to static electricity, which could lead to short circuits in the battery cell stacks. It also prevents problems such as diaphragm wrinkles caused by static electricity, thereby achieving high diaphragm tape run speed and tape run quality. In this embodiment, the static electricity removal mechanism 6 is located near the tension rocker mechanism 4 and near the tape run path between the tension rocker mechanism 4 and the buffer mechanism 5.

[0063] In some embodiments, the defective rate of cell stacking can also be reduced by using a correction mechanism 8. In this embodiment, the correction mechanism 8 is located after the buffer mechanism 5. After the diaphragm passes through the buffer mechanism 5, it is conveyed to the correction mechanism 8. The correction mechanism 8 adjusts the position of the diaphragm to prevent the diaphragm from shifting and thus preventing the stacking from forming defective cells.

[0064] In addition, the frame 100 can also be provided with a roll diameter detection mechanism 20, which is located near the unwinding mechanism 1 to detect the roll diameter of the diaphragm material roll in real time, and cooperate with the unwinding mechanism 1 to adjust the unwinding speed in real time to ensure that the unwinding process of the diaphragm unwinding equipment is accurate and controllable, thereby improving the quality of the diaphragm.

[0065] In summary, this embodiment provides a diaphragm unwinding device, which mainly optimizes the positions of different mechanisms and the diameter of the diaphragm roller 10, thereby streamlining the overall structure, shortening the diaphragm tape path, and reducing the number of rollers, so as to reduce the cost of the diaphragm unwinding device and improve the overall stability of the equipment, ensure that the diaphragm has good quality during the tape running process, and avoid the occurrence of poor laminated battery cells due to diaphragm unwinding problems.

[0066] Example 2:

[0067] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the diaphragm unwinding device of the utility model. Please refer to embodiment 1 for the similarities. The improvements are described below.

[0068] like Figure 7 and Figure 8As shown, in order to cooperate with the buffer mechanism 5 to realize the caching and release of the diaphragm and avoid the situation of excessive diaphragm running, a diaphragm pressing mechanism 9 is also provided on the frame 100, and the diaphragm pressing mechanism 9 is arranged in front of the buffer mechanism 5. In this embodiment, the diaphragm that passes through the tension rocker mechanism 4 passes through the diaphragm pressing mechanism 9 and the third iron removal component 73 in turn and is then run to the buffer mechanism 5. In this process, the static electricity removal mechanism 6 is arranged on the side of the running path between the diaphragm pressing mechanism 9 and the third iron removal component 73. The diaphragm pressing mechanism 9 is provided with a diaphragm roller 10 and a pressure block that abuts the diaphragm roller 10. The diaphragm pressing mechanism 9 compresses or relaxes the diaphragm through the cooperation of the pressure block and the diaphragm roller 10 to control the discharge of the diaphragm.

[0069] Example 3:

[0070] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the diaphragm unwinding device of the utility model, see Figure 9 .

[0071] As shown in the figure, the membrane unwinding device of this embodiment further includes a flattening roller 11, which is arranged between the splicing platform mechanism 2 and the tension detection mechanism 3. The membrane passing through the splicing platform mechanism 2 is wound around the flattening roller 11 and then connected to the tension detection mechanism 3.

[0072] The flattening roller 11 as the membrane passing roller 10 can also be provided with a ceramic layer, and the diameter is preferably 26 mm. In particular, in order to stretch the membrane, the surface of the flattening roller 11 is also processed with positive and negative thread lines to stretch the membrane and prevent the membrane from wrinkling.

[0073] The above content is merely an example and illustration of the structure of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these obvious alternative forms are all within the scope of protection of the present invention.

Claims

1. A diaphragm unwinding device, characterized in that: The machine comprises a frame (100), wherein the frame (100) is provided with the following components in sequence along the path of the membrane tape: An unwinding mechanism (1) for unwinding and recovering the membrane roll; A splicing platform mechanism (2) for splicing different membrane rolls; A tension detection mechanism (3) is used to detect the tension of the diaphragm during the tape running process; A tension rocker mechanism (4) is used to adjust the tension of the diaphragm during the tape running process; as well as a buffer mechanism (5) for storing or releasing the diaphragm; The tape splicing platform mechanism (2), the tension detection mechanism (3) and the tension swing mechanism (4) are arranged around the unwinding mechanism (1), and the buffer mechanism (5) is located below the tension swing mechanism (4); The belt connection platform mechanism (2), the tension detection mechanism (3), the tension rocker mechanism (4) and the buffer mechanism (5) are provided with a plurality of diaphragm rollers (10) for diaphragm transmission, and the diameter of the diaphragm rollers (10) is 20-30 mm.

2. The diaphragm unwinding device according to claim 1, characterized in that: The diameter of the diaphragm roller (10) is 26 mm.

3. The diaphragm unwinding device according to claim 1, characterized in that: The surface of the diaphragm roller (10) is provided with a ceramic layer.

4. The diaphragm unwinding device according to claim 1, characterized in that: A flattening roller (11) is provided between the unwinding mechanism (1) and the tape splicing platform, and the flattening roller (11) is provided with a thread line for preventing wrinkles from occurring on the diaphragm.

5. The diaphragm unwinding device according to claim 1, characterized in that: The frame (100) is also provided with a reel diameter detection mechanism (20) close to the unreeling mechanism (1).

6. The diaphragm unwinding device according to claim 1, characterized in that: The frame (100) is also provided with an iron removal mechanism.

7. The diaphragm unwinding device according to claim 6, characterized in that: The iron removal mechanism comprises a first iron removal component (71), a second iron removal component (72) and a third iron removal component (73); the diaphragm is sequentially wound around the first iron removal component (71) and the second iron removal component (72) and then wound around the tension rocker mechanism (4); and the third iron removal component (73) is arranged between the tension rocker mechanism (4) and the cache mechanism (5).

8. The diaphragm unwinding device according to claim 1, characterized in that: A diaphragm pressing mechanism (9) is further provided between the tension rocker mechanism (4) and the cache mechanism (5). The diaphragm pressing mechanism (9) cooperates with the cache mechanism (5) to control the storage or release of the diaphragm.

9. The diaphragm unwinding device according to claim 1, characterized in that: The frame (100) is provided with a static electricity removal mechanism (6) and / or a deviation correction mechanism (8).

10. The diaphragm unwinding device according to claim 1, characterized in that: The tape splicing platform mechanism (2) is located on one side of the unwinding mechanism (1), the tension swing mechanism (4) is located on the other side opposite to the unwinding mechanism (1), the buffer mechanism (5) is located below the tension swing mechanism (4), and the buffer mechanism (5) is closer to the unwinding mechanism (1) relative to the tension swing mechanism (4); The diaphragm is unwound by the unwinding mechanism (1), and passes through the belt splicing platform mechanism (2), the tension detection mechanism (3), the tension rocker mechanism (4), and the buffer mechanism (5) in sequence.

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