Film pasting equipment for large-board finished product PCB protective film

Abstract

The invention belongs to the technical field of PCB protective films, and particularly relates to large board finished product PCB protective film pasting equipment which comprises a film pasting machine, moving devices are arranged on the two sides of the film pasting machine, each moving device comprises a film pasting block connected to one side of the film pasting machine in a sliding mode, a film pasting roller is rotationally connected between two buffering blocks, and the film pasting roller is provided with a film pasting groove. A protective film is rotationally connected between the two film pasting blocks, the output end of the second motor is fixedly connected with a film cutting knife, the film cutting knife is used for cutting the redundant protective film to complete film pasting, and the film pasting machine is provided with a film pasting plate located between the two moving devices. One end of a protective film is placed on the film rolling roller, a sixth motor is started to enable a film pressing block to rotate to press the protective film on the film rolling roller, the protective film covers a film pasting plate, the pulled-out protective film is compacted on a PCB to be pasted, and the problems that the protective film is not stably fixed on a film pasting table, so that wrinkles are generated, and even the protective film falls off the film pasting table are solved; the pasting effect of the PCB protection film is improved, and the protection effect on the PCB is further improved.

Description

Technical Field

[0001] This invention belongs to the field of PCB protective film, specifically a film application device for large-format finished PCBs. Background Technology

[0002] A PCB, also known as a printed circuit board, is used as a support for electronic components and a carrier for electrical connections between them. It plays an important role in the mass production of fixed circuits and the optimization of electrical appliance layout. During the manufacturing process of PCBs, a film needs to be applied to protect the surface of the PCB.

[0003] A patent with publication number CN219181773U discloses a film-applying device for PCB boards, including a base, a support plate with rollers for pressing the film, a lifting unit for driving the rollers to move vertically, and a driving unit for driving the rollers to move horizontally, thereby pressing the film tightly onto the PCB board, simultaneously squeezing out any remaining air bubbles between the film and the PCB board, and finally expelling the air bubbles from one side, effectively improving the bonding effect between the film and the PCB board.

[0004] The above method typically involves pressing the protective film onto a film application platform on one side of the PCB board and fixing it using the film's own adhesive properties. This can lead to problems such as unstable film fixation, wrinkles, or even the film falling off the application platform, affecting the adhesion of the PCB protective film and consequently the protection of the PCB board.

[0005] Therefore, the present invention provides a film-applying device for protective film on large-format PCBs. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A film-applying device for protective film on large-format PCBs, comprising a film-applying machine, with moving devices on both sides of the film-applying machine. Each moving device includes a film-applying block slidably connected to one side of the film-applying machine. A first motor is fixedly connected to one side of the film-applying machine, and a first threaded rod is fixedly connected to the output end of the first motor. The first threaded rod is threadedly connected to the film-applying block. A film-applying cylinder is fixedly connected to one side of the film-applying block, and a buffer block is fixedly connected to the output end of the film-applying cylinder. A film-applying roller is rotatably connected between two buffer blocks. A protective film is rotatably connected between two film-applying blocks. A transfer roller is rotatably connected between two film-applying blocks. The film applicator has a placement plate on one side, a take-up block fixed to one side of the placement plate, a transmission rod rotatably connected to the take-up block, and a film roller fixed to the transmission rod. Two fixing plates are fixed to one side of the placement plate, a sixth motor is fixed to one of the fixing plates, and a pressure block is fixed to the output end of the sixth motor. The pressure block is rotatably connected to the fixing plate on the side away from the sixth motor. Support frames are fixed to both sides of the film applicator, and film-cutting cylinders are fixed to the support frames. A second motor is fixed to the output end of the film-cutting cylinder, and a film-cutting knife is fixed to the output end of the second motor. The film-cutting knife is used to cut excess protective film. The film applicator has an applicator plate located between the two moving devices.

[0008] Preferably, a cutting plate is fixedly connected to one side of the film applicator, a seventh motor is fixedly connected inside the film applicator, a fourth threaded rod is fixedly connected to the output end of the seventh motor, the fourth threaded rod is rotatably connected to the cutting plate, a cutting cylinder is threadedly connected to the fourth threaded rod, the cutting cylinder is slidably connected to the cutting plate, a cutting blade is slidably connected inside the cutting cylinder, a sliding rod is fixedly connected inside the cutting cylinder, the sliding rod is slidably connected to the cutting blade, a first spring is sleeved on the sliding rod, one end of the first spring is fixedly connected to the cutting blade, and the other end of the first spring is fixedly connected to the cutting cylinder.

[0009] Preferably, a clamping cylinder is fixedly connected to one side of the film-applying block, and the output ends of the two clamping cylinders are jointly fixedly connected to an upper clamping plate. A lower clamping plate is fixedly connected between the two film-applying blocks on one side of the upper clamping plate.

[0010] Preferably, the upper clamping plate and the lower clamping plate are provided with toothed grooves on opposite sides.

[0011] Preferably, each of the two buffer blocks is fixedly connected to a fixing rod, each of the two fixing rods is slidably connected to a connecting plate, each of the two connecting plates is rotatably connected to the film-applying roller, each of the two fixing rods is fitted with a third spring, one end of each of the two third springs is fixedly connected to the buffer block, and the other end of each of the two third springs is fixedly connected to the connecting plate.

[0012] Preferably, a sliding column is fixedly connected to one side of the cutting blade, and a sliding groove is provided on one side of the film applicator, with the sliding column and the sliding groove being slidably connected.

[0013] Preferably, both sides of the film applicator are fixedly connected to a push cylinder, and the output ends of the two push cylinders are fixedly connected to a support plate. A third motor is fixedly connected to one side of the support plate near the take-up block. A second threaded rod is fixedly connected to the output end of the third motor. One end of the second threaded rod is rotatably connected to the third motor. A take-up block is threadedly connected to the second threaded rod. The take-up block is slidably connected to the support plate.

[0014] Preferably, a fourth motor is fixedly connected to one side of the take-up block, one end of the transmission rod passes through the take-up block, and the output end of the fourth motor is fixedly connected to one end of the transmission rod.

[0015] Preferably, a fifth motor is fixedly connected to one side of the transmission rod of the winding block, a third threaded rod is fixedly connected to the output end of the fifth motor, a sliding ring is slidably connected to the placement plate, a toothed ring is rotatably connected inside the sliding ring, the toothed ring is slidably connected to the film winding roller, and the sliding ring is threadedly connected to the third threaded rod.

[0016] Preferably, the placement plate is fixedly connected to a fixed cylinder on one side of the film roll, and a push block is slidably connected inside the fixed cylinder. The push block is movably connected to the film roll. Two support rods are fixedly connected inside the fixed cylinder. The push block is slidably connected to the support rods. Each of the two support rods is fitted with a second spring. One end of the second spring is fixedly connected to the fixed cylinder, and the other end of the second spring is fixedly connected to the push block.

[0017] The beneficial effects of this invention are as follows: 1. The present invention discloses a protective film application device for large-format PCBs. By starting a first motor to rotate a first threaded rod, one end of the protective film is placed on a film roll. A sixth motor is then started to rotate a pressure block, pressing the protective film onto the film roll, covering the application board. The pulled-out protective film is pressed firmly onto the PCB for adhesion. A second motor is started to rotate a film cutter to cut the protective film on the PCB, thus completing the PCB application process. This solves the problem of unstable fixation of the protective film on the application table, resulting in wrinkles or even detachment, improving the adhesion effect of the PCB protective film, thereby enhancing the protection of the PCB and increasing the application efficiency.

[0018] 2. The protective film application equipment for large-board finished PCBs of the present invention involves starting the fifth motor to rotate the third threaded rod, thereby causing the sliding ring to slide along the third threaded rod on the placement plate. The sliding ring, along with the toothed ring, slides on the film roll, thereby pushing off the excess protective film collected on the film roll. Then, the sliding ring is moved to one end closer to the fifth motor to perform the next collection of excess protective film. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mobile device structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the buffer block of the present invention; Figure 4 This is a schematic diagram of the cutting cylinder structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the cutting blade of the present invention; Figure 6 This is a schematic cross-sectional view of the film applicator of the present invention; Figure 7 yes Figure 6 Enlarged view of a portion of point A in the middle; Figure 8 This is a schematic diagram of the cross-sectional structure of the fixed cylinder of the present invention; In the diagram: 1. Film applicator; 2. Applicator block; 3. Protective film; 4. Transfer roller; 5. Clamping cylinder; 6. Upper clamping plate; 7. Applicator cylinder; 8. Buffer block; 9. Applicator roller; 10. First motor; 11. First threaded rod; 12. Applicator plate; 13. Pressing block; 14. Rolling roller; 15. Support frame; 16. Cutting cylinder; 17. Second motor; 18. Connecting plate; 19. Cutting knife; 20. Transmission rod; 21. Pushing cylinder; 22. Support plate; 23. Third motor; 24. Second threaded rod; 25. Rewinding mechanism. 26. Block; 27. Fourth motor; 28. Fifth motor; 29. ​​Third threaded rod; 30. Sliding ring; 31. Placement plate; 32. Fixing plate; 33. Sixth motor; 34. Seventh motor; 35. Fourth threaded rod; 36. Cutting plate; 37. Cutting cylinder; 38. Cutting blade; 39. Sliding groove; 40. Sliding column; 41. Sliding rod; 42. First spring; 43. Toothed ring; 44. Push block; 45. Support rod; 46. Second spring; 47. Fixing cylinder; 48. Lower clamping plate; 49. Fixing rod; 40. Third spring. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0022] like Figures 1 to 2 As shown in the embodiment of the present invention, a film-applying device for protective film on a large-format PCB includes a film applicator 1. Movable devices are provided on both sides of the film applicator 1. Each movable device includes a film applicator block 2 slidably connected to one side of the film applicator 1. A first motor 10 is fixedly connected to one side of the film applicator 1. A first threaded rod 11 is fixedly connected to the output end of the first motor 10 and threadedly connected to the film applicator block 2. A film applicator cylinder 7 is fixedly connected to one side of the film applicator block 2. A buffer block 8 is fixedly connected to the output end of the film applicator cylinder 7. A film applicator roller 9 is rotatably connected between two buffer blocks 8. A protective film 3 is rotatably connected between two film applicator blocks 2. A transfer roller 4 is rotatably connected between two film applicator blocks 2. A placement plate 30 is provided on one side of the film applicator 1. A take-up block 25 is fixedly connected to one side of the 0. A transmission rod 20 is rotatably connected to the take-up block 25. A film roller 14 is fixedly connected to the transmission rod 20. Two fixed plates 31 are fixedly connected to one side of the placement plate 30. A sixth motor 32 is fixedly connected to one fixed plate 31. A pressure block 13 is fixedly connected to the output end of the sixth motor 32. The pressure block 13 is rotatably connected to the fixed plate 31 on the side away from the sixth motor 32. Support frames 15 are fixedly connected to both sides of the film applicator 1. A film cutting cylinder 16 is fixedly connected to the support frame 15. A second motor 17 is fixedly connected to the output end of the film cutting cylinder 16. A film cutting knife 19 is fixedly connected to the output end of the second motor 17. The film cutting knife 19 is used to cut excess protective film 3. A film applicator plate 12 is provided between the two moving devices.

[0023] Specifically, when applying protective film to a PCB board, the protective film 3 needs to be stretched and one end fixed to one end of the application table to cover the PCB board. Then, rollers are used to press the protective film 3 onto the PCB board. The protective film 3 is then cut according to the PCB board model using a cutting device. Finally, the protective film 3 on the PCB board is cut off from the roll of the protective film 3 to complete the application of the protective film to the PCB board. However, in the above solutions, the protective film 3 is pressed onto the application table on one side of the PCB board and fixed by its own adhesiveness. This can lead to unstable fixation of the protective film 3, wrinkles, or even falling off the application table, affecting the adhesion effect of the PCB protective film 3 and thus the protection effect on the PCB board. When applying film to the PCB board, the first motor 10 is started to rotate the first threaded rod 11, causing the film-applying block 2 to move along the first threaded rod 11 towards the first motor 10 on the film-applying machine 1. The film-applying block 2, along with the moving device, the protective film 3, and the film-applying cylinder 7, moves together, placing one end of the protective film 3 on the film-rolling roller 14. The sixth motor 32 is started to rotate the film-pressing block 13, pressing the protective film 3 onto the film-rolling roller 14. The first motor 10 is then started again to rotate the first threaded rod 11, causing the film-applying block 2 to move along the first threaded rod 11 away from the first motor 10 on the film-applying machine 1. The film-applying block 2, along with the moving device, the protective film 3, and the film-applying cylinder 7, moves together, covering the film-applying plate 12 with the protective film 3. During the process, the film-applying cylinder 7 is activated, causing the buffer block 8 to move downwards along with the film-applying roller 9, pressing the pulled-out protective film 3 firmly onto the PCB board for adhesion. When cutting the protective film 3 on the PCB board, the film-cutting cylinder 16 is activated, causing the second motor 17 to move the film-cutting blade 19 downwards, so that the film-cutting blade 19 presses against the protective film 3 on the film-applying plate 12. Then, the second motor 17 is activated again, causing the film-cutting blade 19 to rotate and cut the protective film 3 on the PCB board, thus completing the film application work on the PCB board. This solves the problem of the protective film 3 being unstable on the film-applying table, resulting in wrinkles or even falling off the film-applying table, improving the adhesion effect of the PCB protective film 3, thereby improving the protection effect of the PCB board and increasing the film application efficiency of the PCB board.

[0024] like Figure 4 As shown, a cutting plate 35 is fixedly connected to one side of the film applicator 1. A seventh motor 33 is fixedly connected inside the film applicator 1. A fourth threaded rod 34 is fixedly connected to the output end of the seventh motor 33. The fourth threaded rod 34 is rotatably connected to the cutting plate 35. A cutting cylinder 36 is threadedly connected to the fourth threaded rod 34. The cutting cylinder 36 is slidably connected to the cutting plate 35. A cutting blade 37 is slidably connected inside the cutting cylinder 36. A sliding rod 40 is fixedly connected inside the cutting cylinder 36. The sliding rod 40 is slidably connected to the cutting blade 37. A first spring 41 is sleeved on the sliding rod 40. One end of the first spring 41 is fixedly connected to the cutting blade 37, and the other end of the first spring 41 is fixedly connected to the cutting cylinder 36.

[0025] Specifically, when dividing the protective film 3, the seventh motor 33 is started to rotate the fourth threaded rod 34, so that the cutting cylinder 36 slides along the fourth threaded rod 34 on the cutting plate 35. The cutting cylinder 36 moves with the cutting blade 37 to divide the protective film 3. The cutting blade 37 can slide inside the cutting cylinder 36 through the sliding rod 40 and the first spring 41, so that the cutting blade 37 can press tightly against the film application table to divide the protective film 3.

[0026] like Figure 3 As shown, a clamping cylinder 5 is fixedly connected to one side of the film-applying block 2, and the output ends of the two clamping cylinders 5 are jointly fixedly connected to an upper clamping plate 6. A lower clamping plate 47 is fixedly connected between the two film-applying blocks 2 on one side of the upper clamping plate 6.

[0027] Specifically, before dividing the protective film 3, the clamping cylinder 5 is activated to move the upper clamping plate 6 downward. The upper clamping plate 6 and the lower clamping plate 47 clamp the protective film 3, which can better divide the protective film 3 and hold one end of the divided protective film 3, making it convenient to fix one end of the protective film 3 on the film application table for the next PCB board to be filmed.

[0028] like Figure 3 As shown, toothed grooves are provided on the opposite sides of the upper clamping plate 6 and the lower clamping plate 47.

[0029] Specifically, when dividing the protective film 3, the upper clamping plate 6 and the lower clamping plate 47 with toothed grooves can better clamp one end of the protective film 3 so as to carry out the subsequent film application work.

[0030] like Figure 4 As shown, each of the two buffer blocks 8 is fixedly connected to a fixing rod 48, and each of the two fixing rods 48 is slidably connected to a connecting plate 18. Each of the two connecting plates 18 is rotatably connected to the film-applying roller 9. Each of the two fixing rods 48 is fitted with a third spring 49. One end of each of the two third springs 49 is fixedly connected to the buffer block 8, and the other end of each of the two third springs 49 is fixedly connected to the connecting plate 18.

[0031] Specifically, when the protective film 3 is pressed firmly onto the PCB board, the film-applying roller 9 can slide on the fixed rod 48 through the connecting plate 18 and the third spring 49. The extension and retraction of the third spring 49 can ensure that the film-applying roller 9 will not damage the PCB board when pressing the protective film 3 for application.

[0032] like Figure 4 As shown, a sliding column 39 is fixedly connected to one side of the cutting blade 37, and a sliding groove 38 is provided on one side of the film applicator 1. The sliding column 39 and the sliding groove 38 are slidably connected.

[0033] Specifically, after the protective film 3 is cut, the seventh motor 33 is started to move the cutting cylinder 36, carrying the cutting blade 37, back into the film applicator 1 on the side close to the seventh motor 33. This causes the sliding column 39 to slide into the sliding groove 38. The sliding groove 38 is an inclined groove, so the sliding column 39 can slide upward through the sliding groove 38, thereby driving the cutting blade 37 to move upward within the cutting cylinder 36. This protects the tip of the cutting blade 37, reduces the wear of the cutting blade 37, and increases the service life of the cutting blade 37.

[0034] like Figure 7As shown, both sides of the film applicator 1 are fixedly connected to push cylinders 21. The output ends of the two push cylinders 21 are fixedly connected to support plates 22. A third motor 23 is fixedly connected to one side of the support plate 22 near the take-up block 25. A second threaded rod 24 is fixedly connected to the output end of the third motor 23. One end of the second threaded rod 24 is rotatably connected to the third motor 23. A take-up block 25 is threadedly connected to the second threaded rod 24. The take-up block 25 is slidably connected to the support plate 22.

[0035] Specifically, when removing excess protective film 3, the push cylinder 21 is activated to push the support plate 22 upward, and the third motor 23 is activated to rotate the second threaded rod 24, so that the take-up block 25 can slide on the support plate 22. The take-up block 25 can then drive the film roller 14 and the film pressing block 13 on the placement plate 30 to move, thereby removing the cut protective film 3 from the film application plate 12.

[0036] like Figure 7 As shown, a fourth motor 26 is fixedly connected to one side of the take-up block 25, one end of the transmission rod 20 passes through the take-up block 25, and the output end of the fourth motor 26 is fixedly connected to one end of the transmission rod 20.

[0037] Specifically, when removing the excess protective film 3, the fourth motor 26 is started to rotate the transmission rod 20, thereby rotating the film winding roller 14. Under the pressure of the film pressing block 13, the excess protective film 3 is wound onto the film winding roller 14, thus removing and collecting the excess protective film 3 after cutting. Example

[0038] like Figure 6 As shown in Example 1, another embodiment of the present invention is as follows: The take-up block 25 is fixedly connected to a fifth motor 27 on one side of the transmission rod 20. The output end of the fifth motor 27 is fixedly connected to a third threaded rod 28. A sliding ring 29 is slidably connected on the placement plate 30. A toothed ring 42 is rotatably connected inside the sliding ring 29. The toothed ring 42 is slidably connected to the film roll 14. The sliding ring 29 is threadedly connected to the third threaded rod 28.

[0039] Specifically, when the excess protective film 3 has been collected, the fifth motor 27 is started to rotate the third threaded rod 28, so that the sliding ring 29 slides along the third threaded rod 28 on the placement plate 30. The sliding ring 29, along with the toothed ring 42, slides on the film winding roller 14, thereby pushing the excess protective film 3 collected on the film winding roller 14 off the film winding roller 14. Then, the sliding ring 29 is moved to one end closer to the fifth motor 27, so that the next collection of excess protective film 3 can be carried out.

[0040] like Figure 8As shown, a fixed cylinder 46 is fixedly connected to one side of the film roll 14 on the placement plate 30. A push block 43 is slidably connected inside the fixed cylinder 46. The push block 43 is movably connected to the film roll 14. Two support rods 44 are fixedly connected inside the fixed cylinder 46. The push block 43 is slidably connected to the support rods 44. A second spring 45 is sleeved on both support rods 44. One end of the second spring 45 is fixedly connected to the fixed cylinder 46, and the other end of the second spring 45 is fixedly connected to the push block 43.

[0041] Specifically, when collecting excess protective film 3, the film roll 14 rotates inside the push block 43 and is supported by the fixed cylinder 46. When pushing the excess protective film 3 off the film roll 14, the toothed ring 42 pushes the push block 43, causing the push block 43 to slide inside the fixed cylinder 46 via the support rod 44 and the second spring 45, thus completely removing the excess protective film 3 from the film roll 14. After the excess protective film 3 is removed, the sliding ring 29 moves back to the side closer to the fifth motor 27 with the toothed ring 42. Under the action of the second spring 45, the push block 43 moves out of the fixed cylinder 46 and continues to support the film roll 14.

[0042] Working principle: When applying film to the PCB board, the first motor 10 is started, causing the first threaded rod 11 to rotate. This moves the film-applying block 2 along the first threaded rod 11 towards the first motor 10 on the film-applying machine 1. The film-applying block 2, along with the moving device, the protective film 3, and the film-applying cylinder 7, moves together, placing one end of the protective film 3 onto the film-rolling roller 14. The sixth motor 32 is then started, causing the pressure block 13 to rotate and press the protective film 3 onto the film-rolling roller 14. The first motor 10 is then started again, causing the first threaded rod 11 to rotate, moving the film-applying block 2 along the first threaded rod 11 away from the first motor 10 on the film-applying machine 1. 2. Move the protective film 3 and the film-applying cylinder 7 together with the moving device to cover the film-applying plate 12 with the protective film 3. During the movement, start the film-applying cylinder 7 to move the buffer block 8 and the film-applying roller 9 downward together to press the pulled-out protective film 3 firmly onto the PCB board for bonding. When cutting the protective film 3 on the PCB board, start the film-cutting cylinder 16 to move the second motor 17 downward with the film-cutting blade 19 so that the film-cutting blade 19 presses against the protective film 3 on the film-applying plate 12. Then start the second motor 17 to rotate the film-cutting blade 19 to cut the protective film 3 on the PCB board, thus completing the film application work on the PCB board. When dividing the protective film 3, the clamping cylinder 5 is activated to move the upper clamping plate 6 downward. The upper clamping plate 6 and the lower clamping plate 47 clamp the protective film 3. The upper clamping plate 6 and the lower clamping plate 47 with toothed grooves can better clamp one end of the protective film 3, and can better divide the protective film 3. The seventh motor 33 is activated to rotate the fourth threaded rod 34, so that the cutting cylinder 36 slides along the fourth threaded rod 34 on the cutting plate 35. The cutting cylinder 36 moves with the cutting knife 37 to divide the protective film 3. The cutting knife 37 can slide inside the cutting cylinder 36 through the sliding rod 40 and the first spring 41, so that the cutting knife 37 can press tightly against the film application table to divide the protective film 3. When the protective film 3 is pressed firmly on the PCB board, the film application roller 9 can slide on the fixed rod 48 through the connecting plate 18 and the third spring 49. The extension and retraction of the third spring 49 can ensure that the film application roller 9 will not damage the PCB board when pressing the protective film 3 for application. After the protective film 3 is cut, the seventh motor 33 is started, causing the cutting cylinder 36, carrying the cutting blade 37, to move back into the film applicator 1 near the seventh motor 33. This causes the sliding column 39 to slide into the sliding groove 38. The sliding groove 38 is an inclined groove, so the sliding column 39 can slide upward through the sliding groove 38, thereby driving the cutting blade 37 to move upward within the cutting cylinder 36. This protects the tip of the cutting blade 37, reduces wear on the cutting blade 37, and increases the service life of the cutting blade 37. When removing excess protective film 3, the push cylinder 21 is activated to push the film. The support plate 22 rises, and the third motor 23 is started to rotate the second threaded rod 24, allowing the take-up block 25 to slide on the support plate 22. This allows the take-up block 25 to move the film-winding roller 14 and the pressure block 13 on the placement plate 30, thus removing the cut protective film 3 from the film-applying plate 12. The fourth motor 26 is started to rotate the transmission rod 20, causing the film-winding roller 14 to rotate. Under the pressure of the pressure block 13, the excess protective film 3 is wound onto the film-winding roller 14. When the excess protective film 3 has been collected, the third motor 23 is started to rotate. The fifth motor 27 rotates the third threaded rod 28, causing the sliding ring 29 to slide along the third threaded rod 28 on the placement plate 30. The sliding ring 29, along with the toothed ring 42, slides on the film winding roller 14, thereby pushing off the excess protective film 3 collected on the film winding roller 14. Then, the sliding ring 29 is moved to the end closer to the fifth motor 27, and the next collection of excess protective film 3 can begin. While collecting the excess protective film 3, the film winding roller 14 rotates within the push block 43, and the fixed cylinder 46 winds the film... The film roller 14 provides support. When the excess protective film 3 is pushed off the film roller 14, the toothed ring 42 pushes the push block 43, causing the push block 43 to slide in the fixed cylinder 46 through the support rod 44 and the second spring 45. This completely removes the excess protective film 3 from the film roller 14. After the excess protective film 3 is removed, the sliding ring 29 moves back to the side closer to the fifth motor 27 with the toothed ring 42. The push block 43 moves out of the fixed cylinder 46 under the action of the second spring 45 and continues to support the film roller 14.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A film-applying device for protective film on large-format PCBs, characterized in that: The system includes a film applicator (1), with moving devices on both sides. Each moving device includes a film applicator block (2) slidably connected to one side of the film applicator (1). A first motor (10) is fixedly connected to one side of the film applicator (1), and a first threaded rod (11) is fixedly connected to the output end of the first motor (10). The first threaded rod (11) is threadedly connected to the film applicator block (2). A film applicator cylinder (7) is fixedly connected to one side of the film applicator block (2), and a buffer block (8) is fixedly connected to the output end of the film applicator cylinder (7). A film applicator roller (9) is rotatably connected between the two buffer blocks (8). A protective film (3) is rotatably connected between the two film applicator blocks (2), and a transfer roller (4) is rotatably connected between the two film applicator blocks (2). A placement plate (30) is provided on one side of the film applicator (1), and a take-up block (25) is fixedly connected to one side of the placement plate (30). A drive rod (20) is rotatably connected to a roll block (25). A film roller (14) is fixedly connected to the drive rod (20). Two fixing plates (31) are fixedly connected to one side of the placement plate (30). A sixth motor (32) is fixedly connected to one side of the fixing plate (31). A film pressing block (13) is fixedly connected to the output end of the sixth motor (32). The film pressing block (13) is rotatably connected to the fixing plate (31) on the side away from the sixth motor (32). Support frames (15) are fixedly connected to both sides of the film applicator (1). A film cutting cylinder (16) is fixedly connected to the support frame (15). A second motor (17) is fixedly connected to the output end of the film cutting cylinder (16). A film cutting knife (19) is fixedly connected to the output end of the second motor (17). The film cutting knife (19) is used to cut excess protective film (3). A film applicator plate (12) is provided between the two moving devices.

2. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: A cutting plate (35) is fixedly connected to one side of the film applicator (1). A seventh motor (33) is fixedly connected inside the film applicator (1). A fourth threaded rod (34) is fixedly connected to the output end of the seventh motor (33). The fourth threaded rod (34) is rotatably connected to the cutting plate (35). A cutting cylinder (36) is threadedly connected to the fourth threaded rod (34). The cutting cylinder (36) is slidably connected to the cutting plate (35). A cutting blade (37) is slidably connected inside the cutting cylinder (36). A sliding rod (40) is fixedly connected inside the cutting cylinder (36). The sliding rod (40) is slidably connected to the cutting blade (37). A first spring (41) is sleeved on the sliding rod (40). One end of the first spring (41) is fixedly connected to the cutting blade (37), and the other end of the first spring (41) is fixedly connected to the cutting cylinder (36).

3. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: A clamping cylinder (5) is fixedly connected to one side of the film-applying block (2), and the output ends of the two clamping cylinders (5) are jointly fixedly connected to an upper clamping plate (6). A lower clamping plate (47) is fixedly connected between the two film-applying blocks (2) on one side of the upper clamping plate (6).

4. The film-applying equipment for protective film on large-format PCBs according to claim 3, characterized in that: The upper clamping plate (6) and the lower clamping plate (47) are both provided with toothed grooves on their opposite sides.

5. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: Each of the two buffer blocks (8) is fixedly connected to a fixing rod (48), and each of the two fixing rods (48) is slidably connected to a connecting plate (18). Each of the two connecting plates (18) is rotatably connected to a film-applying roller (9). Each of the two fixing rods (48) is fitted with a third spring (49). One end of each of the two third springs (49) is fixedly connected to the buffer block (8), and the other end of each of the two third springs (49) is fixedly connected to the connecting plate (18).

6. The film-applying equipment for protective film on large-format PCBs according to claim 2, characterized in that: A sliding column (39) is fixedly connected to one side of the cutting blade (37), and a sliding groove (38) is provided on one side of the film applicator (1). The sliding column (39) and the sliding groove (38) are slidably connected.

7. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: The film applicator (1) has two push cylinders (21) fixedly connected to both sides. The output ends of the two push cylinders (21) are fixedly connected to support plates (22). A third motor (23) is fixedly connected to one side of the support plate (22) near the take-up block (25). A second threaded rod (24) is fixedly connected to the output end of the third motor (23). One end of the second threaded rod (24) is rotatably connected to the third motor (23). A take-up block (25) is threadedly connected to the second threaded rod (24). The take-up block (25) is slidably connected to the support plate (22).

8. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: A fourth motor (26) is fixedly connected to one side of the take-up block (25), one end of the transmission rod (20) passes through the take-up block (25), and the output end of the fourth motor (26) is fixedly connected to one end of the transmission rod (20).

9. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: The take-up block (25) is fixedly connected to a fifth motor (27) on one side of the transmission rod (20). The output end of the fifth motor (27) is fixedly connected to a third threaded rod (28). A sliding ring (29) is slidably connected on the placement plate (30). A toothed ring (42) is rotatably connected inside the sliding ring (29). The toothed ring (42) is slidably connected to the film roll (14). The sliding ring (29) is threadedly connected to the third threaded rod (28).

10. The film-applying equipment for protective film on large-format PCBs according to claim 1, characterized in that: The placement plate (30) is fixedly connected to a fixed cylinder (46) on one side of the film roll (14). A push block (43) is slidably connected inside the fixed cylinder (46). The push block (43) is movably connected to the film roll (14). Two support rods (44) are fixedly connected inside the fixed cylinder (46). The push block (43) is slidably connected to the support rods (44). Both support rods (44) are fitted with second springs (45). One end of the second spring (45) is fixedly connected to the fixed cylinder (46), and the other end of the second spring (45) is fixedly connected to the push block (43).

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