A film-coating device for copper-tin electroplating using a dry film overlay method.

Abstract

This invention discloses a film-applying device for copper-tin electroplating using a dry film covering method. The device includes a worktable, a hot press roller disposed on the surface of the worktable, a conveying device for conveying the workpiece, a film-winding device for winding the dry film, an electric push rod disposed on the top of the worktable, and a positioning frame slidably connected to the output end of the electric push rod. When the electric push rod pushes the positioning frame towards the workpiece, a sliding block is pulled by a connecting rod. The sliding block clamps the dry film through a fixed clamp and a clamping block, and pulls it out synchronously, ensuring the dry film is in a relaxed state before lamination, preventing air bubbles and wrinkles that could affect the sealing effect of subsequent copper-tin electroplating and lead to plating defects. At this point, the sliding block first pulls the dry film to move and tension it, and then the pressure plate continues to press down, pressing the tensioned dry film onto the surface of the workpiece, making the edge sealing area of ​​the workpiece more tightly adhered and reducing air bubble formation.

Description

Technical Field

[0001] This invention relates to the field of film application device technology, specifically to a film application device that uses a dry film covering method for electroplating copper and tin. Background Technology

[0002] In the printed circuit board (PCB) manufacturing process, pattern transfer is a crucial step before copper-tin plating. Dry film is typically used as a resist layer. Through processes such as film application, exposure, and development, the desired circuit pattern is formed on the board surface, followed by selective copper-tin plating. The quality of the dry film application directly determines the precision and yield of subsequent electroplating. If the film is not tightly adhered to the board, the plating solution can easily seep beneath the dry film, leading to plating defects and affecting the quality of the circuit formation.

[0003] The patent with publication number CN220774284U describes a process where, when a lead frame is conveyed to a vacuum suction cup via a conveying mechanism, a height adjustment component moves the vacuum suction cup vertically downwards and uses it to adhere and fix the lead frame. Then, the height adjustment component moves the vacuum suction cup and the lead frame vertically upwards to a suitable distance, and a horizontal adjustment component moves the electroplating film application body horizontally to the lead frame. The electroplating film application body then applies an electroplating film to the lead frame. This patent allows for continuous electroplating film application to multiple lead frames without stopping the conveying mechanism.

[0004] The aforementioned case allows for electroplating of the lead frame using an electroplating film application device. However, in actual use, while the dry film can be quickly pressed onto the board surface to ensure its anti-plating effect in subsequent electroplating processes, it lacks auxiliary clamping and automatic cutting functions. When the dry film is pressed, its edges may lift or shift due to the instantaneous impact force during cutting. The film application device, lacking auxiliary clamping, cannot secure these edges, resulting in ineffective sealing of the board edges during electroplating and allowing electroplating solution to seep into areas that should not be plated. Furthermore, wrinkles and bubbles on the dry film gradually enlarge during subsequent electroplating, reducing the anti-plating effect of the dry film and the electroplating quality of the board. This diminishes both the effectiveness and efficiency of the film application device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a film-coating device for copper-tin electroplating using a dry film covering method, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a film-applying device for copper-tin electroplating using a dry film covering method, comprising a worktable, a hot pressure roller disposed on the surface of the worktable, a conveying device for conveying the board, a film-winding device for winding the dry film, an electric push rod disposed on the top of the worktable, and a positioning frame slidably connected to the output end of the electric push rod. The film-applying device for copper-tin electroplating using a dry film covering method further comprises: a film-pressing device for pressing the dry film, a film-clamping device for clamping the dry film, and an auxiliary device for preheating the board after film application. The pressing device includes an inner rod fixed to the bottom of the output end of the electric push rod, a pressure plate fixedly connected to the inner rod, a sliding block sliding on the inner wall of the positioning frame, and a connecting rod 1 rotatably connecting the worktable and the sliding block. The inner rod slides through the top of the positioning frame, one end of the connecting rod 1 is rotatably connected to the top of the inner wall of the worktable, and the other end of the connecting rod 1 is rotatably connected to the sliding block.

[0007] The pressing device further includes a fixed clamp sliding on the inner wall of the sliding block, a clamping block sliding on the inner wall of the fixed clamp, a push block slidably connected to the sliding block, a rotating block rotatably connected to the positioning frame, a blocking block fixedly connected to the rotating block, an upper cutter fixedly connected to the pressing plate, and a lower cutter fixedly connected to the positioning frame. A stop bar is provided inside the worktable.

[0008] An elastic element is provided between the positioning frame and the electric push rod to reset the positioning frame. An elastic element is provided between the fixed clamp and the sliding block to move the fixed clamp toward the dry film. An elastic element is provided between the sliding block and the push block to reset the push block. The side of the push block near the fixed clamp is sloped to facilitate the movement of the fixed clamp. An elastic element is provided between the clamp block and the fixed clamp to facilitate clamping the dry film. A torsion spring is provided between the rotating block and the positioning frame to reset the fixed clamp.

[0009] The film clamping device includes a sliding rod slidably connected to the positioning frame, a connecting rod 1 rotatably connecting the sliding rod and the electric push rod, a sliding push rod slidably connected to the positioning frame, and a connecting rod 2 rotatably connecting the sliding push rod and the sliding rod.

[0010] The membrane clamping device also includes a sliding block slidably connected to the positioning frame, a pressure rod fixedly connected to the sliding block, a round rod slidably penetrating the outer wall of the positioning frame, and a limiting key fixedly connected to the round rod. A round groove is provided on the side of the sliding block near the limiting key, and the round groove matches the limiting key.

[0011] An elastic element is provided between the limit key and the positioning frame. The elastic element is provided to drive the limit key to move in the direction of the sliding block. The side of the sliding block and the limit key that are close to each other is set as an inclined surface. The inclined surface is provided to facilitate the movement of the limit key when the sliding block moves. The side of the sliding push rod and the sliding block that are close to each other is set as an inclined surface.

[0012] The auxiliary device includes a hydraulic cylinder one fixedly connected to the workbench, a clamping plate sliding on the inner wall of the hydraulic cylinder one, a connecting rod two rotatably connecting the positioning frame and the clamping plate, a hydraulic cylinder two fixedly connected to the positioning frame, and a guide plate slidably connected to the inner wall of the hydraulic cylinder two. The hydraulic cylinder one and the hydraulic cylinder two are connected by a hose.

[0013] The auxiliary device also includes a preheating device slidably connected to the inner wall of the workbench, a double-headed telescopic rod rotatably connected to the inner wall of the workbench, a rotating rod one rotatably connected to the positioning frame, and a rotating rod two rotatably connected to the preheating device. The rotating rod one is rotatably connected to the movable end of one side of the double-headed telescopic rod, and the rotating rod two is rotatably connected to the movable end of the other side of the double-headed telescopic rod.

[0014] The guide plate is provided with a roller on the side near the positioning frame, the preheating device is provided with a heating roller at the bottom, a rubber ring is provided between the guide plate and the second hydraulic cylinder, and a rubber ring is provided between the clamping plate and the first hydraulic cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, when the electric push rod pushes the positioning frame to move towards the board, the sliding block is pulled by the connecting rod. The sliding block clamps the dry film through the fixed clamp and the clamping block and pulls it out simultaneously, so that the dry film is in a relaxed state before pressing, avoiding the generation of bubbles and wrinkles, which would affect the sealing effect of subsequent copper-tin electroplating and lead to plating defects. At this time, the sliding block first pulls the dry film to move and tighten it. Then the pressure plate continues to press down, pressing the tightened dry film onto the surface of the board, making the edge sealing area of ​​the board fit more tightly and reducing the generation of bubbles. After the positioning frame contacts the stop bar on the inner wall of the worktable, it is blocked and stops moving. The electric push rod continues to push the pressure plate to move downward. The pressure plate drives the upper cutter to move, and forms a shearing force with the lower cutter to cut the dry film. No additional drive mechanism or human intervention is required, so that pressing and cutting are completed continuously during the pressing stroke. The action is smooth and the position is accurate.

[0016] 2. In this invention, at the moment the dry film is cut, the impact force generated by the cutter can easily cause the dry film to shift laterally, resulting in uneven cuts or changes in the position of the dry film, which affects the subsequent lamination accuracy. The dry film is assisted in clamping by the pressure rod, and the sliding block is locked by the limit key, so that the dry film remains stable during the cutting process. The round rod pushes the limit key to release the limit on the sliding block, the pressure rod loses its clamping function, and the clamping block clamps the dry film at the same time, without the need for additional instrument control or human intervention.

[0017] 3. In this invention, the clamping plate clamps the board during the lamination process to prevent displacement of the board due to the pressure of the dry film during lamination if the board is not fixed, which could cause misalignment between the dry film and the board. This avoids offset of the dry film coverage caused by board displacement. If the temperature of the dry film and the board is too low before hot pressing, a longer hot pressing time or a higher hot pressing temperature is required to achieve the ideal bonding effect. By using the resetting action of the positioning frame, the mechanical linkage causes the preheating device to automatically descend, preheating the dry film and the board, thereby improving the efficiency and quality of subsequent hot pressing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the film winding device and the electric push rod of the present invention; Figure 3 This is a schematic diagram showing the position and structure of the connecting rod and the sliding rod of the present invention; Figure 4 This is a schematic diagram showing the positions of the upper and lower cutting blades of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the three-position structure of the sliding push rod and connecting rod of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram of section B in the middle; Figure 8 This is a schematic diagram showing the position and structure of the hydraulic cylinder 2 and the guide plate of the present invention; Figure 9 This is a schematic diagram of the hydraulic cylinder and clamping plate positions of the present invention.

[0019] The meanings of the labels in the diagram are as follows: 1. Workbench; 2. Hot press roller; 3. Conveying device; 4. Film winding device; 5. Electric push rod; 6. Positioning frame; 7. Inner rod; 8. Pressure plate; 9. Sliding block; 10. Connecting rod one; 11. Fixing clamp; 12. Clamping block; 13. Push block; 14. Rotating block; 15. Blocking block; 16. Upper cutter; 17. Lower cutter; 21. Connecting rod one; 22. Sliding rod; 23. Sliding push rod; 24. Connecting rod two; 25. Sliding block; 26. Pressure rod; 27. Limit key; 28. Round rod; 31. Hydraulic cylinder one; 32. Clamping plate; 33. Connecting rod two; 34. Hydraulic cylinder two; 35. Guide plate; 36. Double-headed telescopic rod; 37. Rotating rod one; 38. Rotating rod two; 39. Preheating device. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-9 One embodiment of the present invention is: a film-applying device for copper-tin electroplating using a dry film covering method, comprising a worktable 1, a hot pressure roller 2 disposed on the surface of the worktable 1, a conveying device 3 for conveying the board, a film-winding device 4 for winding the dry film, an electric push rod 5 disposed on the top of the worktable 1, and a positioning frame 6 slidably connected to the output end of the electric push rod 5. The film-applying device for copper-tin electroplating using a dry film covering method further comprises: a film-pressing device for pressing the dry film, a film-clamping device for clamping the dry film, and an auxiliary device for preheating the board after film application. The film pressing device includes an inner rod 7 fixed to the bottom of the output end of the electric push rod 5, a pressure plate 8 fixedly connected to the inner rod 7, a sliding block 9 sliding on the inner wall of the positioning frame 6, and a connecting rod 10 rotatably connecting the worktable 1 and the sliding block 9. The inner rod 7 slides through the top of the positioning frame 6, one end of the connecting rod 10 is rotatably connected to the top of the inner wall of the worktable 1, and the other end of the connecting rod 10 is rotatably connected to the sliding block 9.

[0022] The film pressing device also includes a fixed clamp 11 that slides on the inner wall of the sliding block 9, a clamping block 12 that slides on the inner wall of the fixed clamp 11, a push block 13 that slides on the sliding block 9, a rotating block 14 that rotates on the positioning frame 6, a blocking block 15 that is fixedly connected to the rotating block 14, an upper cutter 16 that is fixedly connected to the pressure plate 8, and a lower cutter 17 that is fixedly connected to the positioning frame 6. A stop bar is provided inside the worktable 1.

[0023] An elastic element is provided between the positioning frame 6 and the electric push rod 5 to drive the positioning frame 6 to reset. An elastic element is provided between the fixed clamp 11 and the sliding block 9 to drive the fixed clamp 11 to move towards the dry film. An elastic element is provided between the sliding block 9 and the push block 13 to drive the push block 13 to reset. The side of the push block 13 closest to the fixed clamp 11 is set with an inclined surface to facilitate pushing the fixed clamp 11 to move. An elastic element is provided between the clamp block 12 and the fixed clamp 11 to facilitate pushing the clamp block 12 to clamp the dry film. A torsion spring is provided between the rotating block 14 and the positioning frame 6 to drive the fixed clamp 11 to reset.

[0024] In this embodiment, during film application, the conveying device 3 moves the board. When the board moves to the bottom of the positioning frame 6, the output end of the electric push rod 5 extends, pushing the positioning frame 6 towards the board. The movement of the positioning frame 6 moves the dry film, pressing it onto the board surface. When the electric push rod 5 resets the positioning frame 6, the film winding device 4 winds up any excess dry film. After film application, the conveying device 3 brings the board into contact with the hot press roller 2, which then heat-presses the board and the dry film. When the output end of the electric push rod 5 pushes the positioning frame 6 towards the board, it pulls the connecting rod 10, which in turn pulls the sliding block 9. The sliding block 9's movement is controlled by the fixing clamp 1. 1. The clamping block 12 pulls the dry film to move. When the sliding block 9 moves, it pushes the rotating block 14 to rotate. When the positioning frame 6 moves, it drives the pressure plate 8 to move. When the positioning frame 6 moves, it will contact the stop bar on the inner wall of the worktable 1. The stop bar will then prevent the positioning frame 6 from moving further. The electric push rod 5 can push the pressure plate 8 to continue moving downward. The electric push rod 5 pushing the pressure plate 8 to continue moving downward will press the pulled-out dry film onto the surface of the board. When the pressure plate 8 moves, it will drive the upper cutter 16 to move. The movement of the upper cutter 16 will form a shearing force with the lower cutter 17 to cut the film, so that the film can be completely pressed onto the surface of the board. When the electric push rod 5 drives the positioning frame 6 to reset, the connecting rod 10 will simultaneously push the sliding block 9 to reset. When the sliding block 9 resets, it will drive the push block 13 to move. The movement of the push block 13 will interact with the rotating block 14 to move the pressure plate 8. When block 14 contacts, push block 13 will push rotating block 14 to rotate. Rotating block 14 will be blocked by stop block 15, preventing it from rotating. The inclined surface of push block 13 will then contact rotating block 14, causing it to move towards fixed clamp 11 due to the resistance. This movement will cause fixed clamp 11 to contact the inclined surface of push block 13, pushing it to move. The movement of fixed clamp 11 will then cause clamping block 12 to move away from the dry film. Once push block 13 disengages from rotating block 14, fixed clamp 11 will cause clamping block 12 to clamp the dry film, allowing sliding block 9 to pull the dry film out via fixed clamp 11 for the next use. When electric push rod 5 pushes positioning frame 6 towards the plate... The sliding block 9 is pulled by the connecting rod 10. The sliding block 9 clamps the dry film through the fixed clamp 11 and the clamping block 12 and pulls it out synchronously. If the dry film is in a relaxed state before pressing, it will prevent the formation of bubbles and wrinkles, which would affect the sealing effect of subsequent copper-tin electroplating and cause plating defects. At this time, the sliding block 9 first pulls the dry film to move and tighten it. Then the pressure plate 8 continues to press down, pressing the tightened dry film onto the surface of the board, making the edge sealing area of ​​the board more tightly attached and reducing the formation of bubbles. After the positioning frame 6 contacts the stop bar on the inner wall of the worktable 1, it is blocked and stops moving. The electric push rod 5 continues to push the pressure plate 8 to move downward. The pressure plate 8 drives the upper cutter 16 to move, forming a shearing force with the lower cutter 17 to cut the dry film. No additional drive mechanism or human intervention is required, so that pressing and cutting are completed continuously during the pressing stroke.The movements were fluid and the positioning precise.

[0025] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the film clamping device includes a sliding rod 22 slidably connected to the positioning frame 6, a connecting rod 21 rotatably connecting the sliding rod 22 and the electric push rod 5, a sliding push rod 23 slidably connected to the positioning frame 6, and a connecting rod 24 rotatably connecting the sliding push rod 23 and the sliding rod 22.

[0026] The membrane clamping device also includes a sliding block 25 slidably connected to the positioning frame 6, a pressure rod 26 fixedly connected to the sliding block 25, a round rod 28 slidably penetrating the outer wall of the positioning frame 6, and a limiting key 27 fixedly connected to the round rod 28. A round groove is provided on the side of the sliding block 25 near the limiting key 27, and the round groove matches the limiting key 27.

[0027] An elastic element is provided between the limit key 27 and the positioning frame 6. The elastic element is provided to drive the limit key 27 to move towards the sliding block 25. The side of the sliding block 25 and the limit key 27 that are close to each other is set as an inclined surface. The inclined surface is provided to facilitate the movement of the limit key 27 when the sliding block 25 moves. The side of the sliding push rod 23 that is close to the sliding block 25 is also set as an inclined surface.

[0028] The auxiliary device includes a hydraulic cylinder 31 fixedly connected to the workbench 1, a clamping plate 32 sliding on the inner wall of the hydraulic cylinder 31, a connecting rod 33 rotatably connecting the positioning frame 6 and the clamping plate 32, a hydraulic cylinder 34 fixedly connected to the positioning frame 6, and a guide plate 35 slidably connected to the inner wall of the hydraulic cylinder 34. The hydraulic cylinder 31 and the hydraulic cylinder 34 are connected by a hose.

[0029] The auxiliary device also includes a preheating device 39 that is slidably connected to the inner wall of the workbench 1, a double-headed telescopic rod 36 that is rotatably connected to the inner wall of the workbench 1, a rotating rod 37 that is rotatably connected to the positioning frame 6, and a rotating rod 38 that is rotatably connected to the preheating device 39. The rotating rod 37 is rotatably connected to the movable end of one side of the double-headed telescopic rod 36, and the rotating rod 38 is rotatably connected to the movable end of the other side of the double-headed telescopic rod 36.

[0030] A roller is provided on the side of the guide plate 35 near the positioning frame 6, a heating roller is provided at the bottom of the preheating device 39, a rubber ring is provided between the guide plate 35 and the second hydraulic cylinder 34, and a rubber ring is provided between the clamping plate 32 and the first hydraulic cylinder 31.

[0031] In this embodiment, when the positioning frame 6 contacts the stop rod and the pressure plate 8 presses the dry film against the plate, the positioning frame 6 can slide along the output end surface of the electric push rod 5. The positioning frame 6 will then drive the sliding rod 22 to move. The sliding rod 22 will push the connecting rod 21 to move. The movement of the connecting rod 21 will be blocked by the output end of the electric push rod 5, causing the connecting rod 21 to push the sliding rod 22 to move. The movement of the sliding rod 22 will push the connecting rod 24 to move, which in turn will push the sliding push rod 23 to move. The movement of the sliding push rod 23 will cause the sliding block 25 to contact the inclined surface of the sliding push rod 23, which will then push the sliding block 25 to move. The movement of the sliding block 25 will cause the pressure rod 26 to clamp the dry film. The sliding block 25 will then contact the inclined surface of the limit key 27, which will push the limit key 27 to move away from the sliding block 25. When the limit key 27 coincides with the position of the circular groove, the limit... The positioning key 27 inserts into the circular groove to limit the sliding block 25, ensuring that the dry film does not shift when the pressure plate 8 drives the upper cutter 16 to cut the dry film. When the sliding block 9 resets, it contacts the circular rod 28, which pushes the circular rod 28 to move. The movement of the circular rod 28 pushes the positioning key 27 to release the limit on the sliding block 25, so the pressure rod 26 cannot clamp the dry film. The clamping block 12 then clamps the dry film. At the moment the dry film is cut, the impact force generated by the cutter can easily cause the dry film to shift laterally, resulting in uneven cuts or changes in the position of the dry film, affecting the subsequent lamination accuracy. The pressure rod 26 provides auxiliary clamping for the dry film, and the positioning key 27 locks the sliding block 25, ensuring that the dry film remains stable during the cutting process. The circular rod 28 pushes the positioning key 27 to release the limit on the sliding block 25, and the pressure rod 26 loses its clamping function. At the same time, the clamping block 12 clamps the dry film without the need for additional instrument control or human intervention.

[0032] When the positioning frame 6 moves downward, it pushes the connecting rod 33 to move. The movement of the connecting rod 33 pushes the clamping plate 32 to move away from the hydraulic cylinder 31. Thus, when laminating, the clamping plate 32 can clamp the plate. When the positioning frame 6 resets, it pulls the clamping plate 32 back to its original position via the connecting rod 33. The reset of the clamping plate 32 pushes the liquid inside the hydraulic cylinder 31 into the hydraulic cylinder 34 through the hose. The increase in liquid inside the hydraulic cylinder 34 pushes the guide plate 35 towards the plate. The rollers on the surface of the guide plate 35 then contact the plate and guide it. When the positioning frame 6 resets, it pulls the rotating rod 37 to move. The movement of the rotating rod 37 pulls the double-headed telescopic rod 36 to rotate. The rotation of the double-headed telescopic rod 36 pushes the rotating rod 38 to move. The movement of the rotating rod 38 will push the preheating device 39 downward. The downward movement of the preheating device 39 will cause the bottom heating roller to contact the surface of the dry film, so that the heating roller can preheat the dry film and the board, which will facilitate the subsequent hot pressing of the two. The clamping plate 32 clamps the board during the film covering process to prevent the board from shifting due to the pressure of the dry film during the film covering process if the board is not fixed, causing the dry film and board to misalign. This avoids the dry film covering deviation caused by the board shifting. If the temperature of the dry film and board is too low before hot pressing, a longer hot pressing time or a higher hot pressing temperature is required to achieve the ideal bonding effect. By using the resetting action of the positioning frame 6, the mechanical linkage causes the preheating device 39 to automatically descend, preheating the dry film and board, improving the efficiency and quality of subsequent hot pressing.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film-applying device for electroplating copper and tin using a dry film covering method, comprising a worktable (1), a hot press roller (2) disposed on the surface of the worktable (1), a conveying device (3) for conveying the board, a film-winding device (4) for winding the dry film, an electric push rod (5) disposed on the top of the worktable (1), and a positioning frame (6) slidably connected to the output end of the electric push rod (5), characterized in that, The film-applying device for copper-tin electroplating using the dry film covering method also includes: a film-pressing device for pressing the dry film, a film-clamping device for clamping the dry film, and an auxiliary device for preheating the board after film application. The pressing device includes an inner rod (7) fixed to the bottom of the output end of the electric push rod (5), a pressure plate (8) fixedly connected to the inner rod (7), a sliding block (9) sliding on the inner wall of the positioning frame (6), and a connecting rod (10) rotatably connecting the worktable (1) and the sliding block (9). The inner rod (7) slides through the top of the positioning frame (6), one end of the connecting rod (10) is rotatably connected to the top of the inner wall of the worktable (1), and the other end of the connecting rod (10) is rotatably connected to the sliding block (9).

2. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 1, characterized in that: The pressing device further includes a fixed clamp (11) sliding on the inner wall of the sliding block (9), a clamping block (12) sliding on the inner wall of the fixed clamp (11), a push block (13) slidably connected to the sliding block (9), a rotating block (14) rotatably connected to the positioning frame (6), a blocking block (15) fixedly connected to the rotating block (14), an upper cutter (16) fixedly connected to the pressure plate (8), and a lower cutter (17) fixedly connected to the positioning frame (6). A stop bar is provided inside the worktable (1).

3. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 2, characterized in that: An elastic element is provided between the positioning frame (6) and the electric push rod (5), an elastic element is provided between the fixed clamp (11) and the sliding block (9), an elastic element is provided between the sliding block (9) and the push block (13), the side of the push block (13) near the fixed clamp (11) is set as an inclined surface, an elastic element is provided between the clamp block (12) and the fixed clamp (11), and a torsion spring is provided between the rotating block (14) and the positioning frame (6).

4. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 1, characterized in that: The membrane clamping device includes a sliding rod (22) slidably connected to the positioning frame (6), a connecting rod one (21) rotatably connecting the sliding rod (22) and the electric push rod (5), a sliding push rod (23) slidably connected to the positioning frame (6), and a connecting rod two (24) rotatably connecting the sliding push rod (23) and the sliding rod (22).

5. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 4, characterized in that: The membrane clamping device also includes a sliding block (25) slidably connected to the positioning frame (6), a pressure rod (26) fixedly connected to the sliding block (25), a round rod (28) slidably penetrating the outer wall of the positioning frame (6), and a limiting key (27) fixedly connected to the round rod (28). A round groove is provided on the side of the sliding block (25) near the limiting key (27), and the round groove matches the limiting key (27).

6. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 5, characterized in that: An elastic element is provided between the limit key (27) and the positioning frame (6). The side of the sliding block (25) that is close to the limit key (27) is set as an inclined surface. The side of the sliding push rod (23) that is close to the sliding block (25) is set as an inclined surface.

7. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 1, characterized in that: The auxiliary device includes a hydraulic cylinder (31) fixedly connected to the workbench (1), a clamping plate (32) sliding on the inner wall of the hydraulic cylinder (31), a connecting rod (33) rotatably connecting the positioning frame (6) and the clamping plate (32), a hydraulic cylinder (34) fixedly connected to the positioning frame (6), and a guide plate (35) slidably connected to the inner wall of the hydraulic cylinder (34). The hydraulic cylinder (31) and the hydraulic cylinder (34) are connected by a hose.

8. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 7, characterized in that: The auxiliary device also includes a preheating device (39) slidably connected to the inner wall of the workbench (1), a double-headed telescopic rod (36) rotatably connected to the inner wall of the workbench (1), a rotating rod one (37) rotatably connected to the positioning frame (6), and a rotating rod two (38) rotatably connected to the preheating device (39). The rotating rod one (37) is rotatably connected to the movable end on one side of the double-headed telescopic rod (36), and the rotating rod two (38) is rotatably connected to the movable end on the other side of the double-headed telescopic rod (36).

9. The film-applying device for copper-tin electroplating using a dry film covering method according to claim 8, characterized in that: The guide plate (35) is provided with a roller on the side near the positioning frame (6), the preheating device (39) is provided with a heating roller at the bottom, a rubber ring is provided between the guide plate (35) and the second hydraulic cylinder (34), and a rubber ring is provided between the clamping plate (32) and the first hydraulic cylinder (31).

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