Battery cell film laminating machine

Abstract

The utility model discloses a battery cell film laminating machine which comprises a bottom plate and an adjusting assembly, the adjusting assembly comprises a fixing plate, a first driving rod and a second driving rod, the first driving rod and the second driving rod are rotatably connected to the two ends of the fixing plate, the fixing plate is connected to the bottom plate, the two ends of the first driving rod and the two ends of the second driving rod each comprise a threaded section with opposite thread directions, and the threaded sections are connected to the bottom plate. Two threaded sections of the first driving rod are respectively connected with supporting frames, an insulating film mounting station is arranged between the two supporting frames, threaded sections at two ends of the second driving rod are respectively connected with clamping plates, and a battery cell fixing station is arranged between the two clamping plates. The battery cell laminating device has the beneficial effects that the device can be smoothly applied to battery cells with different specifications and can be used for smoothly laminating the battery cells, so that the application range of the device can be expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production, in particular to a battery core laminating machine. Background Art

[0002] A single electrochemical cell containing positive and negative electrodes is generally not used directly. Unlike batteries that contain protection circuits and shells, they can be used directly. The composition of lithium-ion secondary rechargeable batteries is as follows: cell + protection circuit board. Rechargeable batteries without protection circuit boards are cells. Cells are the power storage part of rechargeable batteries. The quality of cells directly determines the quality of rechargeable batteries. During the production process of cells, it is often necessary to apply a layer of blue insulating film on the outer wall of the cell board to improve the insulation of the battery and effectively prevent the positive and negative electrodes from contacting each other and causing internal short circuits.

[0003] Since the specifications of battery cells of different models are different, the specifications of the insulating films used during lamination are also different. The components of the existing laminating machines for fixing the insulating films and the battery cells are fixed and cannot be adjusted. They cannot be flexibly adjusted according to the models of different battery cells in the later use, which reduces the application scope of the device in the later use. In addition, when laminating the battery cells, the dust adhering to the outer wall of the battery cells cannot be effectively removed, which can easily cause bubbles in the lamination.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to solve the problem that the current laminating machine is fixedly set and cannot be adjusted, resulting in the inability to be flexibly used according to different battery cells, thereby reducing the scope of use.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A battery cell coating machine comprises a base plate and an adjusting component; the adjusting component comprises a fixed plate, a first driving rod and a second driving rod, the first driving rod and the second driving rod are rotatably connected to the two ends of the fixed plate, the fixed plate is connected to the base plate, both ends of the first driving rod and the second driving rod include threaded sections with opposite thread directions, the two threaded sections of the first driving rod are respectively connected to support frames, an insulating film installation station is between the two support frames, the threaded sections at both ends of the second driving rod are respectively connected to clamping plates, a battery cell fixing station is between the two clamping plates.

[0008] The utility model is realized by including thread segments with opposite thread directions at both ends of the first driving rod and the second driving rod. When the first driving rod is rotated, the two support frames can move relative to or away from each other, and an insulating film installation station is formed between the two support frames, which can clamp insulating films of different widths; similarly, when the second driving rod is rotated, the distance between the two clamping plates can also move relative to or away from each other, so as to clamp battery cells of different sizes. When the utility model is used later, the support plate for mounting the insulating film and the clamping plate for clamping the battery cell can be synchronously adjusted, so that the device can be flexibly adjusted according to the specifications of the required coated battery cells during the later use of the device, so that the device can be smoothly applied to battery cells of different specifications and smoothly coated, thereby improving the scope of application of the device.

[0009] Preferably, first sliding grooves are provided on both sides of the bottom plate, the bottom of the support frame is slidably connected to the first sliding grooves, and the bottom of the support frame is connected to the threaded section of the first driving rod through a first connecting rod.

[0010] Preferably, the top end of the support frame is connected to a cartridge, and the cartridge is rotatably connected to the top end of the support frame. An insulating film installation station is located between the two cartridges, and the insulating film is detachably connected to the insulating film installation station.

[0011] Preferably, the end of the clamping plate is connected to the threaded section of the second driving rod through a second connecting rod; second sliding grooves are also provided on both sides of the bottom plate, and the bottom of the clamping plate is slidably connected to the second sliding grooves.

[0012] Preferably, the middle parts of the first driving rod and the second driving rod are smooth rods, and the outer diameter of the smooth rod is larger than the diameter at the threaded section.

[0013] The first driving rod and the second driving rod have the same structure, which can make the center of the battery cell and the center of the covered insulating film on the same vertical plane. Therefore, when the staff is laminating later, the insulating film can be fitted more accurately, further improving the laminating effect of the device.

[0014] Preferably, it also includes a cutting assembly, which is located at one end of the battery cell fixing station close to the insulating film installation station. The cutting assembly includes a cutting slide and a cutting knife. Both ends of the cutting slide are connected to the bottom plate. The cutting slide is located above the clamping plate, and the cutting knife is slidably connected to the cutting slide.

[0015] Preferably, it also includes an auxiliary component, which includes a telescopic frame, a mounting frame, a bonding roller, and a pressure roller. The two telescopic frames are connected to the two sides of the base plate, and the two mounting frames are slidably connected to the telescopic frames. The rotatable bonding roller and the pressure roller are both connected between the two mounting frames, and the horizontal movement range of the bonding roller and the pressure roller covers the battery cell fixing station.

[0016] The utility model can adhere impurities such as dust on the outer wall of the battery cell during the coating process by setting auxiliary components, thereby reducing the phenomenon of bubbles in the coating caused by the influence of dust during the coating process, thereby improving the coating effect of the device. The pressure roller makes the insulating film adhere more tightly.

[0017] Preferably, the telescopic frame comprises a telescopic rod and a guide rod, two telescopic rods are connected to the bottom plate at an interval, and two ends of the guide rod are respectively connected to the two telescopic rods.

[0018] Preferably, the mounting frame includes a slider, a mounting plate, and a gripping rod, the slider is slidably connected to the guide rod, the mounting plate is rotatably connected to the slider, each mounting plate is connected to two gripping rods on one side close to the guide rod, the gripping rod is fixedly connected to the mounting plate, and the two gripping rods are arranged in parallel at intervals.

[0019] Preferably, the sides of the two mounting plates close to each other are connected to a limiting frame, and both ends of the adhesive roller are connected to magnetic blocks, and the magnetic blocks are engaged with the limiting frame and magnetically attracted to each other.

[0020] The magnet attraction is set up so that it is easy to replace.

[0021] The advantages of the utility model are:

[0022] (1) The utility model is realized by including thread segments with opposite thread directions at both ends of the first driving rod and the second driving rod. When the first driving rod is rotated, the two support frames can move relative to or away from each other, and an insulating film installation station is formed between the two support frames, which can clamp insulating films of different widths; similarly, when the second driving rod is rotated, the distance between the two clamping plates can also move relative to or away from each other, so as to clamp battery cells of different sizes. When the utility model is used later, the support plate for mounting the insulating film and the clamping plate for clamping the battery cell can be synchronously adjusted, so that the device can be flexibly adjusted according to the specifications of the required coated battery cells during later use, so that the device can be smoothly adapted to battery cells of different specifications and can coat them smoothly, thereby improving the scope of application of the device;

[0023] (2) The first driving rod and the second driving rod have the same structure, so that the center of the battery cell and the center of the insulating film are on the same vertical plane, so that the insulating film can be more accurately fitted during the subsequent coating process, further improving the coating effect of the device;

[0024] (3) The utility model can adhere dust and other impurities on the outer wall of the battery cell during the coating process by setting up auxiliary components, thereby reducing the phenomenon of bubbles in the coating caused by the influence of dust during the coating process, thereby improving the coating effect of the device. The pressure roller makes the insulating film adhere more tightly;

[0025] (4) The magnet attraction is set in a way that allows for easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a preferred embodiment of the battery core laminating machine of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the bottom plate in the embodiment of the utility model.

[0028] Figure 3 It is a structural schematic diagram of the adjustment component in the embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the auxiliary components in the embodiment of the utility model;

[0030] Figure 5 It is a schematic diagram of the structure of the auxiliary component (removing the adhesive roller) in the embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the sticky roller in the embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the insulating film in the embodiment of the utility model;

[0033] Numbers in the figure:

[0034] 1. Bottom plate; 11. First slide slot; 12. Second slide slot; 2. Adjustment assembly; 21. Fixed plate; 22. First drive rod; 23. Second drive rod; 24. Support frame; 25. Clamp plate; 26. First connecting rod; 27. Second connecting rod; 28. Card cylinder; 3. Cutting assembly; 4. Auxiliary assembly; 41. Telescopic frame; 411. Telescopic rod; 412. Guide rod; 42. Mounting frame; 421. Slider; 422. Mounting plate; 423. Grip rod; 43. Adhesive roller; 44. Pressure roller; 5. Insulation film. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Embodiment 1:

[0037] like Figure 1 As shown, the battery cell coating machine includes a bottom plate 1 and an adjustment component 2; the adjustment component 2 includes a fixed plate 21, a first driving rod 22, and a second driving rod 23, the first driving rod 22 and the second driving rod 23 are rotatably connected to the two ends of the fixed plate 21, the fixed plate 21 is connected to the bottom plate 1, the first driving rod 22 and the second driving rod 23 both include threaded sections with opposite thread directions, the two threaded sections of the first driving rod 22 are respectively connected to the support frame 24, the insulating film installation station is between the two support frames 24, the threaded sections at the two ends of the second driving rod 23 are respectively connected to the clamping plate 25, and the battery cell fixing station is between the two clamping plates 25. The bottom of the support frame 24 is connected to the threaded section of the first driving rod through a first connecting rod 26, and the end of the clamping plate 25 is connected to the threaded section of the second driving rod 23 through a second connecting rod 27.

[0038] Specifically, Figure 2 As shown, the bottom plate 1 is a rectangular plate structure, and the four corners of the bottom are provided with supporting feet. The first slide groove 11 is provided on both sides of the left end. Figure 1 As shown, the bottom of the support frame 24 is slidably connected to the first slide groove 11, and the second slide grooves 12 are opened on both sides of the right end of the bottom plate 1. Figure 1 As shown, the bottom of the clamping plate 25 is slidably connected to the second sliding groove 12 .

[0039] like Figure 3As shown, the first driving rod 22 and the second driving rod 23 have the same structure, and the two are arranged in parallel. The first driving rod 22 and the second driving rod 23 have rotatable connecting vertical plates at both ends, and the vertical plates are connected to the two ends of the fixed plate 21. Both ends of the first driving rod 22 and the second driving rod 23 include threaded sections with opposite thread directions, and the middle part is a smooth rod, and the outer diameter of the smooth rod is larger than the outer diameter of the threaded section. The first driving rod 22 and the second driving rod 23 can be driven by the same driving component or driven by manpower. For example, if the smooth rod part is rotated manually, the relative or opposite movement of the two first connecting rods 26 or the two second connecting rods 27 can be realized. The first driving rod 22 and the second driving rod 23 can also be driven to rotate by a motor, a gear system, a belt or other driving methods in the prior art. According to the coating specifications and the required coating width of the battery cell, the first driving rod 22 and the second driving rod 23 can also be dynamically linked to achieve synchronous adjustment of the two; for example, the first driving rod 22 and the second driving rod 23 are driven by the same driving component, so that the width of the insulating film 5 between the support frames 24 can always adapt to the width of the battery cell.

[0040] The first connecting rod 26 is bent, and the second connecting rod 27 is also bent. The specific bending forms of the two can be set according to the spatial layout. The two support frames 24 are vertically arranged plates, and the opposite side walls of the two support frames 24 are provided with rotatably connected cartridges 28, and the two ends of the insulating film 5 are respectively against the inner walls of the corresponding cartridges 28. The right ends of the two clamping plates 25 are in an outwardly expanded form, which is convenient for the battery cell to be placed in the battery cell installation space. The first driving rod 22 and the second driving rod 23 have the same structure, which can make the center of the battery cell and the center of the covered insulating film 5 on the same vertical plane, so that the staff can make the insulation film 5 fit more accurately when coating in the later stage, further improving the coating effect of the device.

[0041] The top end of the support frame 24 is connected to a cartridge 28 , and the cartridge 28 is rotatably connected to the top end of the support frame 24 . An insulating film installation station is located between the two cartridges 28 , and the insulating film 5 is detachably connected to the insulating film installation station.

[0042] like Figure 2As shown, the cell coating machine of this embodiment also includes a cutting assembly 3, and the cutting assembly 3 is located at one end of the cell fixing station close to the insulating film installation station, and the cutting assembly 3 includes a cutting slide 31 and a cutting knife 32, and both ends of the cutting slide 31 are connected to the bottom plate 1, and the cutting slide 31 is located above the clamping plate 25, and the cutting knife 32 is slidably connected to the cutting slide 31. It is used to cut the film after the cell is coated. Specifically, by setting a sliding cutting knife 32, after the cell is coated later, the insulating film 5 is cut by controlling the cutting knife 32 to slide inside the cutting slide 31, so that the cutting of the insulating film 5 can be more uniform, and the flatness of the cutting part of the insulating film 5 can be improved.

[0043] In this embodiment, by setting thread segments with opposite thread directions on both sides of the outer wall of the first driving rod 22 and the second driving rod 23, when the staff controls the first driving rod 22 and the second driving rod 23 to rotate later, the thread segments with opposite thread directions can drive the first connecting rod 26 and the second connecting rod 27 threadedly connected on the outer wall to move relative to or away from each other, and then the first connecting rod 26 and the second connecting rod 27 can smoothly drive the corresponding support frame 24 and the clamping plate 25 to move, so that the support frame 24 for mounting the insulating film 5 and the clamping plate 25 for clamping the battery cell can be smoothly adjusted synchronously, so that the device can be flexibly adjusted according to the specifications of the required coated battery cells during use later, so that the device can be smoothly used for battery cells of different specifications and can be coated smoothly, thereby improving the scope of application of the device; and by the rotating clamp 28, when the clamp 28 is clamped with the end of the insulating film 5 later, such as Figure 7 As shown, after the staff pulls one side of the outer wall of the insulating film 5, the insulating film 5 can be rotated smoothly, so that the staff can smoothly obtain the insulating film 5.

[0044] Therefore, during the later use of the device, it can be flexibly adjusted according to the specifications of the required coated battery cells, so that the device can be smoothly applied to battery cells of different specifications and smoothly coat them, thereby improving the scope of application of the device.

[0045] Embodiment 2:

[0046] like Figure 4 As shown, on the basis of the above-mentioned embodiment 1, the battery cell coating machine also includes an auxiliary component 4, and the auxiliary component 4 includes a telescopic frame 41, a mounting frame 42, a bonding roller 43, and a pressure roller 44. The two telescopic frames 41 are connected to the two sides of the base plate 1, and the two mounting frames 42 are slidably connected to the telescopic frames 41. The rotatable bonding roller 43 and the pressure roller 44 are both connected between the two mounting frames 42, and the horizontal movement range of the bonding roller 43 and the pressure roller 44 covers the battery cell fixed station.

[0047] like Figure 5 As shown, each telescopic frame 41 includes a telescopic rod 411 and a guide rod 412. Two telescopic rods 411 are connected to the bottom plate 1 at intervals. The telescopic rod 411 is used to adjust the height of the guide rod 412 to adapt to batteries of different heights. The two ends of the guide rod 412 are respectively connected to the two telescopic rods 411. The guide rod 412 serves as a sliding rod, and the mounting frame 42 can slide along the guide rod 412 to the top of the battery installation station, so as to perform the dust sticking and pressing operations in real time.

[0048] Each of the mounting frames 42 includes a slider 421, a mounting plate 422, and a gripping rod 423. The slider 421 is slidably connected to the guide rod 412. One side of the mounting plate 422 is connected to a connecting rod, and the connecting rod is rotatably connected to the side of the slider 421. The side of each mounting plate 422 close to the guide rod 412 is connected to two gripping rods 423, and the gripping rods 423 are fixedly connected to the mounting plate 422. The two gripping rods 423 are spaced and arranged in parallel. The side of the two mounting plates 422 close to each other is connected to a limit frame 424, such as Figure 6 As shown, the two ends of the bonding roller 43 are connected to magnetic blocks 431, and the magnetic blocks 431 are engaged with the limit frame 424 and magnetically attracted to each other. The magnetic attraction setting method can be easily replaced. The bonding roller 43 itself can be rotated to bond dust and the like to the surface of the battery cell.

[0049] The pressure roller 44 itself can also be rolled so as to achieve the pressing function.

[0050] In this embodiment, by providing a rotatably connected mounting frame 42, the staff can control the mounting frame 42 to rotate by the gripping rod 423 as needed during the laminating process, so that the corresponding pressing roller 44 or the bonding roller 43 can be smoothly positioned at the bottom, so that the dust on the outer wall of the battery cell can be adhered or the insulating film 5 can be pressed in the later stage;

[0051] The adhesive roller 43 is composed of multiple layers of cleaning tape. When used later, after the dust on the outer wall of the battery core is adhered, the outer layer of tape can be torn off smoothly, so that a new layer of tape is exposed to the outside, which is convenient for the adhesion of dust later. The adhesive roller 43 is connected by the adsorption method of the magnetic block 431. After the adhesive roller 43 is used, it can be disassembled smoothly to facilitate its replacement.

[0052] At the same time, by setting the telescopic rod 411, when the pressing roller 44 and the bonding roller 43 are used later, the heights of the two can be smoothly adjusted, so that the two can be smoothly adapted to battery cells of different heights when used later.

[0053] The working principle of the battery cell laminating machine provided in this embodiment is as follows:

[0054] When using the laminating machine, the staff first controls the first driving rod 22 and the second driving rod 23 to rotate, and then the first connecting rod 26 and the second connecting rod 27 threadedly connected on the outer wall can be driven to move relative to or away from each other through the threaded sections with opposite thread directions, and then the corresponding support frame 24 and the clamping plate 25 can be smoothly driven to move through the first connecting rod 26 and the second connecting rod 27, so that the insulating film 5 installation position and the battery cell fixing position of the battery cell fixing limit can be smoothly adjusted;

[0055] After the adjustment of the device is completed, the staff can select the appropriate insulating film 5 to be placed between the support frames 24 on both sides, and control the corresponding first driving rod 22 to rotate in the opposite direction again, so that the clamping cylinder 28 of the side wall abuts against the two sides of the insulating film 5, so that the insulating film 5 can be smoothly fixed, and then the battery cell to be coated can be smoothly placed inside the two side clamps 25 whose positions have been adjusted, and the clamps 25 on both sides can smoothly position and fix the position of the battery cell;

[0056] At this time, the staff can hold the gripping rods 423 corresponding to the two sides of the outer wall of the bonding roller 43 with both hands, control the bonding roller 43 to move downward, and make the bonding roller 43 reciprocate on the outer wall of the guide rod 412 toward the direction of the battery cell through the mounting frame 42. When the outer wall of the bonding roller 43 abuts against the top of the battery cell, the bonding roller 43 can smoothly adhere and clean the dust and floating objects on the outer wall of the battery cell, and repeat this process to adhere to multiple outer walls of the battery cell respectively.

[0057] Then the staff pulls the edge of the insulating film 5 with both hands and presses it against the top of the battery cell, so that the insulating film 5 adheres to the outer wall of the battery cell. Then, the staff can smoothly hold the gripping rods 423 corresponding to the two sides of the outer wall of the pressing roller 44 to make the pressing roller 44 reciprocate in the direction of the battery cell to smoothly press the insulating film 5, so that the insulating film 5 adheres more tightly. Then, this step can be repeated to coat multiple sides of the battery cell.

[0058] After completing the coating and pressing of the insulating film 5, the cutting knife 32 can be controlled to slide inside the cutting slide 31 to cut the insulating film 5. Then the staff can take the battery cell out from between the two clamps 25 and bend the insulating film 5 protruding from the side wall so that it fits on the side wall of the battery cell to successfully complete the use of the device.

[0059] The utility model can adhere dust and other impurities on the outer wall of the battery cell during the coating process by setting the auxiliary component 4, thereby reducing the phenomenon of bubbles in the coating caused by the influence of dust during the coating process, thereby improving the coating effect of the device. The pressure roller 44 makes the insulating film 5 adhere more tightly.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell laminating machine, characterized in that: It includes a base plate and an adjustment component; the adjustment component includes a fixed plate, a first driving rod and a second driving rod, the first driving rod and the second driving rod are rotatably connected to the two ends of the fixed plate, the fixed plate is connected to the base plate, both ends of the first driving rod and the second driving rod include threaded sections with opposite thread directions, the two threaded sections of the first driving rod are respectively connected to support frames, an insulating film installation station is between the two support frames, the threaded sections at both ends of the second driving rod are respectively connected to clamping plates, and a battery cell fixing station is between the two clamping plates.

2. The battery cell coating machine according to claim 1, characterized in that: First sliding grooves are provided on both sides of the bottom plate, the bottom of the support frame is slidably connected to the first sliding grooves, and the bottom of the support frame is connected to the threaded section of the first driving rod through a first connecting rod.

3. The battery cell coating machine according to claim 1, characterized in that: The top of the support frame is connected to a cartridge, and the cartridge is rotatably connected to the top of the support frame. An insulating film installation station is located between the two cartridges, and the insulating film is detachably connected to the insulating film installation station.

4. The battery cell coating machine according to claim 1, characterized in that: The end of the clamping plate is connected to the threaded section of the second driving rod through a second connecting rod; second sliding grooves are also provided on both sides of the bottom plate, and the bottom of the clamping plate is slidably connected to the second sliding grooves.

5. The battery cell laminating machine according to claim 1, characterized in that: The middle parts of the first driving rod and the second driving rod are polished rods, and the outer diameter of the polished rod is larger than the diameter of the threaded section.

6. The battery cell coating machine according to claim 1, characterized in that: It also includes a cutting assembly, which is located at one end of the battery cell fixing station close to the insulating film installation station. The cutting assembly includes a cutting slide and a cutting knife. Both ends of the cutting slide are connected to the bottom plate. The cutting slide is located above the clamping plate, and the cutting knife is slidably connected to the cutting slide.

7. The battery cell laminating machine according to claim 1, characterized in that: It also includes auxiliary components, which include a telescopic frame, a mounting frame, a bonding roller, and a pressure roller. The two telescopic frames are connected to the two sides of the base plate, and the two mounting frames are slidably connected to the telescopic frames. The rotatable bonding roller and the pressure roller are both connected between the two mounting frames, and the horizontal movement range of the bonding roller and the pressure roller covers the battery cell fixing station.

8. The battery cell coating machine according to claim 7, characterized in that: The telescopic frame comprises a telescopic rod and a guide rod. Two telescopic rods are connected to the bottom plate at intervals, and two ends of the guide rod are respectively connected to the two telescopic rods.

9. The battery cell laminating machine according to claim 8, characterized in that: The mounting frame includes a slider, a mounting plate, and a gripping rod. The slider is slidably connected to the guide rod, and the mounting plate is rotatably connected to the slider. Each mounting plate is connected to two gripping rods on one side close to the guide rod. The gripping rod is fixedly connected to the mounting plate, and the two gripping rods are arranged in parallel with each other.

10. The battery cell laminating machine according to claim 9, characterized in that: The two sides of the two mounting plates close to each other are connected to a limiting frame, and the two ends of the bonding roller are connected to magnetic blocks, and the magnetic blocks are clamped and magnetically attracted to the limiting frame.

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