Electrolytic copper foil batch packaging mechanism
By designing a batch packaging mechanism for electrolytic copper foil and using automated components to achieve automatic pasting and wrapping of the packaging film, the problem of efficiency issues caused by manual pasting in existing technologies has been solved, thus improving the efficiency and continuity of electrolytic copper foil packaging.
Patent Information
- Application Number
- CN202410249061.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2044-03-05
AI Technical Summary
In the existing electrolytic copper foil packaging process, the packaging film needs to be manually applied, which leads to machine downtime and affects the overall packaging efficiency.
Design a batch packaging mechanism for electrolytic copper foil, which uses components such as a winding table, a packaging table, a carrier plate, clamping rollers, and packaging film. The mechanism achieves automated film pasting and wrapping through drive components and swing components, thereby improving efficiency.
The process of automating electrolytic copper foil packaging has been realized, improving overall packaging efficiency, reducing manual intervention, and enhancing production continuity.
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Figure CN118125185B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electrolytic copper foil packaging equipment, and particularly to a batch packaging mechanism for electrolytic copper foil. BACKGROUND
[0002] The electrolytic copper foil is a metal copper foil produced by using copper material as the main raw material and adopting electrolysis method.
[0003] The packaging film is wound around the outer circumferential surface of the wound electrolytic copper foil to reduce damage of the electrolytic copper foil due to friction during transportation and to protect the electrolytic copper foil. In the existing electrolytic copper foil, the staff pastes one end of the packaging film on the electrolytic copper foil after winding, and the electrolytic copper foil is rotated to realize winding of the packaging film. However, the electrolytic copper foil needs to be stopped each time for winding, and the staff manually pastes one end of the packaging film on the electrolytic copper foil, which affects the overall packaging efficiency and needs to be improved. SUMMARY
[0004] The present application aims to provide a batch packaging mechanism for electrolytic copper foil to improve the overall packaging efficiency of the electrolytic copper foil.
[0005] The batch packaging mechanism for electrolytic copper foil provided by the present application adopts the following technical scheme: a winding table and a packaging table are provided, the winding table is rotationally connected with a winding roller, the winding table is connected with a winding assembly for driving the winding roller to rotate, the packaging table is slidably connected with two carrier plates, the packaging table is connected with a first driving member for driving the two carrier plates to slide towards the direction of approaching or moving away from the winding roller, the carrier plate is rotationally connected with a packaging roller and two clamping rollers, the packaging roller is connected with a packaging film, the two clamping rollers are located between the packaging roller and the winding roller, and the gap between the winding roller and the two clamping rollers corresponds.
[0006] According to the above technical scheme, after the winding roller completes winding of the electrolytic copper foil, the first driving member drives the carrier plate to slide towards the direction of approaching the winding roller until the packaging film clamped on the two clamping rollers abuts against the winding roller, so that the packaging film is pasted on the winding roller. The winding assembly drives the winding roller to rotate, and the packaging film is wound around the outer circumferential surface of the electrolytic copper foil, thereby improving the overall packaging efficiency of the electrolytic copper foil. When the packaging film is wound for a certain number of times, the winding roller stops rotating, and the staff cuts off the packaging film to complete the packaging of the electrolytic copper foil, and finally the winding roller is replaced. The cut packaging film is still between the two clamping rollers, which facilitates pasting of the packaging film on the replaced winding roller.
[0007] Optionally, the carrier plate is swingably connected with a pressing roller for abutting against the clamping roller, and the carrier plate is connected with a swing assembly for driving the pressing roller to swing towards the direction of approaching or moving away from the clamping roller.
[0008] By adopting the technical scheme, after the packaging film is cut, the swing assembly drives the pressing roller to swing towards the direction of approaching the clamping roller, so that the packaging film is clamped by the pressing roller and the clamping roller, thereby improving the stability of the packaging film placement and facilitating the packaging film to be pasted on the winding roller. After the packaging film is pasted on the winding roller, the swing assembly drives the pressing roller to swing away from the clamping roller, so that the pressing roller releases the packaging film, and the packaging film is conveniently wound on the outer circumferential surface of the electrolytic copper foil.
[0009] Optionally, the swing assembly comprises a rotating rod rotatably connected to the carrier plate and a second driving member for driving the rotating rod to rotate, the second driving member is connected to the carrier plate, the rotating rod is fixedly connected with a connecting rod, and the pressing roller is connected to the connecting rod.
[0010] By adopting the technical scheme, the second driving member drives the rotating rod to rotate around the axis line thereof, that is, the pressing roller rotates around the axis line of the rotating rod, so that the pressing roller swings towards the direction of approaching or moving away from the clamping roller, and the pressing roller clamps or releases the packaging film.
[0011] Optionally, the carrier plate is slidably connected with a first cutter, the first cutter is located between the winding roller and the clamping roller, and the carrier plate is connected with a sliding assembly for driving the first cutter to slide.
[0012] By adopting the technical scheme, after the packaging film is wound on the outer circumferential surface of the electrolytic copper foil, the sliding assembly drives the first cutter to slide, and the first cutter cuts the packaging film. After the packaging film is cut, the sliding assembly drives the first cutter to reset, thereby providing space for the winding roller to be attached to the packaging film.
[0013] Optionally, the carrier plate is detachably connected with a connecting shaft, the packaging roller is sleeved on the connecting shaft, the packaging roller is provided with a through hole for the connecting shaft to pass through, the outer circumferential surface of the connecting shaft is fixedly connected with a connecting piece, and the contact area of the connecting shaft and the connecting piece is smaller than the inner wall area of the through hole.
[0014] By adopting the technical scheme, the contact area of the connecting shaft and the connecting piece is smaller than the inner wall area of the through hole, thereby reducing the contact area of the packaging roller and the connecting shaft, that is, reducing the friction between the packaging roller and the connecting shaft, and facilitating the rotation of the packaging roller.
[0015] Optionally, the carrier plate is provided with a gap slot for the connecting shaft to be clamped, and the carrier plate and the connecting shaft are connected through a locking piece.
[0016] By adopting the technical scheme, the gap slot provides space for the connecting shaft to be installed on the carrier plate, facilitates the connecting shaft to be fixedly connected to the carrier plate through the locking piece, and improves the stability of the connecting shaft installation.
[0017] Optionally, the support block is connected with a support groove for clamping the connecting shaft, the support groove corresponds to the let-out groove, and the locking member is used for fixing the connecting shaft on the support block.
[0018] By adopting the above technical scheme, the support block is clamped into the support groove, and the inner wall of the support groove supports the connecting shaft. Since the support groove corresponds to the let-out groove, the connecting shaft is aligned with the let-out groove, facilitating the clamping of the connecting shaft into the let-out groove and improving the efficiency of the installation of the connecting shaft.
[0019] Optionally, the let-out groove is slidably connected with a positioning plate, and the positioning plate is connected with the inner wall of the let-out groove through an elastic member.
[0020] By adopting the above technical scheme, the connecting shaft is clamped into the let-out groove, the connecting shaft abuts against the positioning plate and drives the positioning plate to slide towards the elastic member, the elastic member is elastically deformed and compressed under pressure, when the other end of the connecting shaft is clamped into another let-out groove, the connecting shaft is loosened, the elastic member is elastically reset, the elastic member forces the positioning plate to slide towards the connecting shaft, and the positioning plate drives the connecting shaft to move to the corresponding position, facilitating the installation of the connecting shaft on the support block through the locking member.
[0021] Optionally, the positioning plate is connected with a limiting block, and the carrier plate is provided with a limiting groove for clamping and sliding of the limiting block, and the limiting groove is communicated with the let-out groove.
[0022] By adopting the above technical scheme, when the positioning plate slides, the limiting block slides along the limiting groove, and the limiting block and the limiting groove slide together, guiding and limiting the sliding of the positioning plate, thereby improving the stability of the sliding of the positioning plate and protecting the elastic member from rotating during the compression or reset process.
[0023] Optionally, the winding table is relatively slidably connected with two support plates, the winding table is connected with a linkage assembly for driving the two support plates to slide towards each other or away from each other, one side of the two support plates is provided with a rotating groove for clamping the winding roller, the winding assembly comprises a rotating disc rotatably connected to the winding table and a third driving member for driving the rotating disc to rotate, the third driving member is connected to the winding table, the rotating disc is provided with an accommodating groove for clamping the winding roller, the winding roller is connected with a plurality of driving blocks, the rotating disc is provided with a driving groove for clamping the corresponding driving blocks, and the driving groove is communicated with the accommodating groove.
[0024] By adopting the above technical solution, when installing the take-up roller, the drive block is engaged in the receiving groove, and the outer surface of the drive block is in contact with the inner wall of the receiving groove. The inner wall of the receiving groove restricts the movement of the drive block, thereby improving the stability of the take-up roller placement. The linkage component drives the two support plates to slide towards each other, causing the take-up roller to engage in the rotating groove. The inner wall of the rotating groove supports the take-up roller, preventing it from detaching from the turntable during rotation.
[0025] In summary, the present invention has at least one of the following beneficial technical effects:
[0026] 1. After the winding roller finishes winding the electrolytic copper foil, the first drive unit drives the carrier plate to slide closer to the winding roller until the packaging film clamped on the two clamping rollers comes into contact with the winding roller, thus adhering the packaging film to the winding roller. The winding assembly drives the winding roller to rotate, and the packaging film wraps around the outer circumference of the electrolytic copper foil, thereby improving the overall packaging efficiency of the electrolytic copper foil.
[0027] 2. The second driving component drives the rotating rod to rotate around its own axis, and the pressing roller rotates around the axis of the rotating rod, thereby causing the pressing roller to swing towards or away from the clamping roller, so that the pressing roller clamps or releases the packaging film. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.
[0029] Figure 2 yes Figure 1 One of the cross-sectional views shows the second lead screw.
[0030] Figure 3 yes Figure 2 The second sectional view shows the connecting shaft.
[0031] Figure 4 yes Figure 3 An enlarged view of region A.
[0032] Figure 5 This is a partial structural schematic diagram of an embodiment of the present invention.
[0033] Figure 6 yes Figure 5 A sectional view.
[0034] Figure 7 yes Figure 5 Exploded view.
[0035] Figure 8 yes Figure 7 A magnified view of region B.
[0036] Explanation of reference signs: 1, winding table; 11, winding roller; 111, driving block; 12, guide roller; 13, second connecting block; 131, second cutter; 14, second lead screw; 15, fourth driving part; 16, support plate; 161, rotating groove; 2, packaging table; 21, first driving part; 3, winding assembly; 31, rotating disc; 311, containing groove; 312, driving groove; 32, third driving part; 4, carrier plate; 41, packaging roller; 411, packaging film; 412, through hole; 42, clamping roller; 43, pressing roller; 44, first connecting block; 441, first cutter; 45, supporting block; 451, supporting groove; 46, accommodating groove; 47, positioning plate; 471, limiting block; 48, elastic part; 49, limiting groove; 5, swinging assembly; 51, rotating rod; 52, second driving part; 53, connecting rod; 6, sliding assembly; 61, first lead screw; 62, fifth driving part; 7, connecting shaft; 71, connecting part; 8, locking part; 9, linkage assembly; 91, bidirectional lead screw; 92, sixth driving part. DETAILED DESCRIPTION
[0037] The above description is combined with the accompanying drawings Figure 1 - the accompanying drawings Figure 8 The application is further described in detail.
[0038] The embodiment of the application discloses a batch packaging mechanism for electrolytic copper foil.
[0039] Combined with the accompanying drawings Figure 1 and Figure 2 As shown in the drawings, the application comprises a winding table 1 and a packaging table 2, the winding table 1 is rotationally connected with a winding roller 11 and two guide rollers 12, and the winding roller 11 is located between the two guide rollers 12 and the packaging table 2. The winding table 1 is slidingly connected with a second connecting block 13, the second connecting block 13 is located between the two guide rollers 12 and the winding roller 11, the second connecting block 13 slides along the length direction of the winding roller 11, and the upper surface of the second connecting block 13 is fixedly connected with a second cutter 131. The winding table 1 is rotationally connected with a second lead screw 14, and the winding table 1 is fixedly connected with a fourth driving part 15 for driving the second lead screw 14 to rotate, the fourth driving part 15 is a motor, the fourth driving part 15 is connected with a controller (not shown in the drawings), the signal output end of the controller is connected with the signal input end of the fourth driving part 15, and one end of the second lead screw 14 close to the fourth driving part 15 is fixedly connected with the output end of the fourth driving part 15. The second connecting block 13 is threadedly connected with the second lead screw 14, one side of the second connecting block 13 is attached to one side of the winding table 1, so that the second connecting block 13 is prevented from rotating during movement.
[0040] Combined with the accompanying drawings Figure 1 and Figure 2As shown, the packaging table 2 is relatively slidingly connected with two loading plates 4, the two loading plates 4 are fixedly connected through a connecting plate, the packaging table 2 is fixedly connected with a first driving piece 21 for driving the connecting plate to slide towards the direction of approaching or moving away from the winding table 1, the first driving piece 21 is a pneumatic cylinder, the signal output end of the controller is connected with the signal input end of the first driving piece 21, and the side of the connecting plate close to the first driving piece 21 is fixedly connected with the output end of the first driving piece 21.
[0041] In combination Figure 1 And Figure 2 As shown, the loading plate 4 is rotationally connected with a packaging roller 41 and two clamping rollers 42, the two clamping rollers 42 are located between the packaging roller 41 and the winding roller 11, and the gap between the winding roller 11 and the two clamping rollers 42 corresponds. The side of the clamping roller 42 away from the packaging roller 41 is swingably connected with a pressing roller 43 for abutting against the clamping roller 42, the loading plate 4 is connected with a swing assembly 5 for driving the pressing roller 43 to swing towards the direction of approaching or moving away from the clamping roller 42, the swing assembly 5 comprises a rotating rod 51 rotationally connected on the loading plate 4 and a second driving piece 52 for driving the rotating rod 51 to rotate, the second driving piece 52 is a motor, the signal output end of the controller is connected with the signal input end of the second driving piece 52, the second driving piece 52 is fixedly connected on the loading plate 4, and the end of the rotating rod 51 close to the second driving piece 52 is fixedly connected with the output end of the second driving piece 52. The side of the rotating rod 51 away from the packaging roller 41 is fixedly connected with an arc-shaped connecting rod 53, and the pressing roller 43 is fixedly connected at the end of the connecting rod 53 away from the rotating rod 51. The loading plate 4 is slidingly connected with a first connecting block 44, the first connecting block 44 is located between the winding roller 11 and the pressing roller 43, the first connecting block 44 slides along the length direction of the pressing roller 43, the upper surface of the first connecting block 44 is fixedly connected with a first cutter 441, and the loading plate 4 is connected with a sliding assembly 6 for driving the first cutter 441 to slide, the sliding assembly 6 comprises a first lead screw 61 rotationally connected on the loading plate 4 and a fifth driving piece 62 for driving the first lead screw 61 to rotate, the fifth driving piece 62 is fixedly connected on the loading plate 4, the signal output end of the controller is connected with the signal input end of the fifth driving piece 62, and the end of the first lead screw 61 close to the fifth driving piece 62 is fixedly connected with the output end of the fifth driving piece 62.
[0042] In combination Figure 3 And Figure 4As shown, the carrier plate 4 is detachably connected with a connecting shaft 7, the wrapping roller 41 is sleeved on the connecting shaft 7, and the outer circumferential surface of the wrapping roller 41 is fixedly connected with a wrapping film 411. The wrapping roller 41 is provided with a through hole 412 for the connecting shaft 7 to pass through, the outer circumferential surface of the connecting shaft 7 is fixedly connected with a connecting piece 71, the connecting piece 71 is a spring, and the contact area of the connecting shaft 7 and the connecting piece 71 is smaller than the inner wall area of the through hole 412. The side of each of the two carrier plates 4 facing each other is fixedly connected with a supporting block 45, and the upper surface of each supporting block 45 is recessed and provided with a supporting groove 451 for the connecting shaft 7 to be clamped into. The side of each of the two carrier plates 4 facing each other is provided with a gap groove 46 for the connecting shaft 7 to be clamped into, the gap groove 46 corresponds to the supporting groove 451, the supporting block 45 is connected with the connecting shaft 7 through a locking piece 8, and the locking piece 8 is a bolt. The gap groove 46 is slidably connected with a positioning plate 47, the positioning plate 47 is connected with the gap groove 46 through a resilient piece 48, the resilient piece 48 is a spring, and the two ends of the resilient piece 48 are fixedly connected with one side of the positioning plate 47 and one side of the inner wall of the gap groove 46, respectively. The positioning plate 47 is fixedly connected with two limiting blocks 471 in opposite directions, and the carrier plate 4 is provided with a limiting groove 49 for the corresponding limiting block 471 to be clamped into and to slide, and the limiting groove 49 is communicated with the gap groove 46.
[0043] In combination Figure 5 and Figure 6 As shown, the winding table 1 is relatively slidably connected with two supporting plates 16, the winding table 1 is connected with a linkage assembly 9 for driving the two supporting plates 16 to slide towards each other or away from each other, and the side of the two supporting plates 16 facing each other is recessed and provided with a rotating groove 161 for the winding roller 11 to be clamped into and to rotate. The linkage assembly 9 comprises a bidirectional screw rod 91 rotatably connected to the winding table 1 and a sixth driving piece 92 for driving the bidirectional screw rod 91 to rotate, the sixth driving piece 92 is a motor, the sixth driving piece 92 is fixedly connected to the winding table 1, the signal output end of the controller is connected with the signal input end of the sixth driving piece 92, and the side of the bidirectional screw rod 91 close to the sixth driving piece 92 is fixedly connected with the output end of the sixth driving piece 92. The two supporting plates 16 are threadedly connected with the bidirectional screw rod 91, and the side of the two supporting plates 16 abuts against the winding table 1 to prevent the supporting plates 16 from rotating during sliding.
[0044] In combination Figure 7 and Figure 8As shown, the winding table 1 is connected with a winding assembly 3 for driving the winding roller 11 to rotate, the winding assembly 3 comprises a rotating disc 31 rotatably connected on the winding table 1 and a third driving member 32 for driving the rotating disc 31 to rotate, the third driving member 32 is a motor, the third driving member 32 is fixedly connected on the winding table 1, the signal output end of the controller is connected with the signal input end of the third driving member 32, and the side of the rotating disc 31 close to the third driving member 32 is fixedly connected with the output end of the third driving member 32. The side of the rotating disc 31 away from the third driving member 32 is recessed with a containing groove 311 for clamping one end of the winding roller 11, and the end of the winding roller 11 away from the supporting plate 16 is fixedly connected with four driving blocks 111, the four driving blocks 111 are uniformly distributed around the axis of the winding roller 11, and the rotating disc 31 is provided with a driving groove 312 for clamping the corresponding driving block 111, and the driving groove 312 is communicated with the containing groove 311.
[0045] The implementation principle of the electrolytic copper foil batch packaging mechanism is as follows:
[0046] The third driving member 32 drives the rotating disc 31 to rotate around the axis thereof, the rotating disc 31 drives the winding roller 11 to rotate around the axis thereof, so that the electrolytic copper foil is wound on the winding roller 11. When the winding of the electrolytic copper foil is completed, the winding roller 11 stops rotating, the fourth driving member 15 drives the second screw rod 14 to rotate around the axis thereof, so that the second cutter 131 cuts the electrolytic copper foil. The first driving member 21 drives the carrier plate 4 to slide towards the winding roller 11, so that the outer circumferential surface of the electrolytic copper foil abuts against the packaging film 411, the packaging film 411 has adhesion, the packaging film 411 is adhered on the packaging film 411, and the first driving member 21 drives the carrier plate 4 to reset. The third driving member 32 drives the winding roller 11 to continue rotating, and the packaging film 411 is wound on the outer circumferential surface of the electrolytic copper foil, when the packaging film 411 is wound for several turns, the winding roller 11 stops rotating. The fifth driving member 62 drives the first screw rod 61 to rotate around the axis thereof, so that the first cutter 441 cuts the packaging film 411, the second driving member 52 drives the rotating rod 51 to rotate around the axis thereof, the pressing roller 43 swings towards the packaging film 411, so that the packaging film 411 is clamped by the pressing roller 43 and the clamping roller 42, so that the stability of the packaging film 411 is good, and the packaging film 411 is adhered on another winding roller 11.
[0047] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A batch packaging mechanism for electrolytic copper foil, characterized in that: The assembly includes a winding table (1) and a packaging table (2). The winding table (1) is rotatably connected to a winding roller (11). The winding table (1) is connected to a winding assembly (3) for driving the winding roller (11) to rotate. The packaging table (2) is slidably connected to two carrier plates (4). The packaging table (2) is connected to a first drive member (21) for driving the two carrier plates (4) to slide towards or away from the winding roller (11). The carrier plates (4) are rotatably connected to a packaging roller (41) and two clamping rollers (42). The packaging roller (41) is connected to a packaging film (411). The two clamping rollers (42) are located between the packaging roller (41) and the winding roller (11). The gap between the winding roller (11) and the two clamping rollers (42) corresponds. The carrier plate (4) is oscillatingly connected to a pressing roller (43) for abutting against the clamping roller (42), and the carrier plate (4) is connected to an oscillating assembly (5) for driving the pressing roller (43) to oscillate toward or away from the clamping roller (42); The carrier plate (4) is slidably connected to a first cutter (441), which is located between the take-up roller (11) and the clamping roller (42). The carrier plate (4) is connected to a sliding assembly (6) for driving the first cutter (441) to slide. The carrier plate (4) is detachably connected to a connecting shaft (7), the packaging roller (41) is sleeved on the connecting shaft (7), the packaging roller (41) is provided with a through hole (412) for the connecting shaft (7) to pass through, and a connector (71) is fixedly connected to the outer circumferential surface of the connecting shaft (7). The contact area between the connecting shaft (7) and the connector (71) is smaller than the inner wall area of the through hole (412).
2. The batch packaging mechanism for electrolytic copper foil according to claim 1, characterized in that: The swing assembly (5) includes a rotating rod (51) rotatably connected to the carrier plate (4) and a second driving member (52) for driving the rotating rod (51) to rotate. The second driving member (52) is connected to the carrier plate (4). The rotating rod (51) is fixedly connected to a connecting rod (53), and the pressing roller (43) is connected to the connecting rod (53).
3. The batch packaging mechanism for electrolytic copper foil according to claim 1, characterized in that: The carrier plate (4) is provided with a relief groove (46) for the connecting shaft (7) to be inserted, and the carrier plate (4) and the connecting shaft (7) are connected by a locking member (8).
4. The batch packaging mechanism for electrolytic copper foil according to claim 3, characterized in that: The carrier plate (4) is connected to a support block (45), the support block (45) is provided with a support groove (451) for the connecting shaft (7) to be inserted, the support groove (451) corresponds to the clearance groove (46), and the locking member (8) is used to fix the connecting shaft (7) on the support block (45).
5. The batch packaging mechanism for electrolytic copper foil according to claim 3, characterized in that: A positioning plate (47) is slidably connected inside the relief groove (46), and the positioning plate (47) is connected to the inner wall of the relief groove (46) through an elastic member (48).
6. The batch packaging mechanism for electrolytic copper foil according to claim 5, characterized in that: The positioning plate (47) is connected to the limiting block (471), and the carrier plate (4) is provided with a limiting groove (49) for the limiting block (471) to be engaged and slid, and the limiting groove (49) is connected to the clearance groove (46).
7. The batch packaging mechanism for electrolytic copper foil according to claim 1, characterized in that: The winding table (1) has two support plates (16) slidably connected to each other. The winding table (1) is connected to a linkage assembly (9) for driving the two support plates (16) to slide towards each other or away from each other. A rotating groove (161) for the winding roller (11) to engage is provided on one side of the two support plates (16). The winding assembly (3) includes a turntable (31) rotatably connected to the winding table (1) and a mechanism for driving the turntable (31). 1) A rotating third drive unit (32) is connected to the winding table (1). The turntable (31) is provided with a receiving groove (311) for the winding roller (11) to be engaged. The winding roller (11) is connected to a plurality of active blocks (111). The turntable (31) is provided with an active groove (312) for the corresponding active block (111) to be engaged. The active groove (312) is connected to the receiving groove (311).
Citation Information
Patent Citations
Flexible packaging line for copper foil rolls of lithium batteries
CN116767604A
Copper foil end face protective paper cutting equipment
CN218659367U