A film tearing structure

Abstract

The utility model provides a kind of film tearing structure, including support platform, several adsorption holes are opened in the support platform;Horizontal movable setting is provided with movable frame on the movable rail;The first drive mechanism is used to drive the movable frame along the length direction of the movable rail activity;The separation roller is rotatably connected to the movable frame, and the outer wall of the separation roller is provided with adhesive layer, and the adhesive layer is used to adhere to the upstream end of PI film after separating PI film and release paper adsorbed by the adsorption hole;The negative pressure net box includes the negative pressure cover of the cover shape of opening downward and the adsorption net body of the porous shape connected to the bottom of the negative pressure cover, and negative pressure pipe is communicated and arranged on the negative pressure net box.The utility model provides a kind of film tearing structure can make production effect better.

Description

Technical Field

[0001] This utility model belongs to the field of film application technology for flexible circuit boards, and relates to a film-peeling structure. Background Technology

[0002] Flexible printed circuit boards (FPCs) are highly reliable and extremely flexible printed circuit boards made with polyimide or polyester film as the substrate. They are characterized by high wiring density, light weight, thinness, and good bendability. PI film, or polyimide film, is one of the world's best-performing thin-film insulating materials. It is made by polycondensation of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (ODA) in a highly polar solvent, followed by casting and imidization.

[0003] Currently, in the production of FPC film, one step involves peeling off the protective film from the FPC, heating it, and then laminating it with a PI film (which also has its own protective layer). The resulting roll is then rolled up to form an FPC film product covered with the PI film. A Chinese patent (CN116512584A) discloses an automatic film-applying device and its process, which solves the problem of applying PI film to FPC films, where the PI film is also in a rolled state. However, in practice, if the quantity of PI film is small or the incoming material is in sheets rather than rolls (each sheet of PI film has its own release paper or protective paper), a negative pressure screen is needed to separately separate the PI film from the release paper and transfer it to the FPC film. However, because the PI film and the corresponding release paper are closely adhered, directly adsorbing and fixing the release paper and then separating the PI film using a negative pressure screen is not effective, resulting in poor production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a tear-off film structure to solve the problem of poor production results.

[0005] To solve the above technical problems, this utility model provides a tear-off film structure, comprising:

[0006] A support platform, wherein a plurality of adsorption holes are provided on the support platform;

[0007] A movable rail, on which a movable frame is horizontally and movably mounted;

[0008] A first driving mechanism is used to drive the movable frame to move along the length direction of the movable rail;

[0009] A separating roller is rotatably connected to the movable frame. An adhesive layer is provided on the outer wall of the separating roller. The adhesive layer is used to separate the PI film from the release paper adsorbed by the adsorption holes after adhering to the upstream end of the PI film.

[0010] The negative pressure mesh box includes a negative pressure cover with an opening facing downwards and a porous adsorption mesh connected to the bottom of the negative pressure cover. A negative pressure pipe is connected to the negative pressure mesh box.

[0011] The present invention is further configured such that two movable rails are provided, and the two movable rails are located on both sides of the support platform.

[0012] The present invention is further configured such that a first cylinder for raising and lowering the support platform is provided at the bottom of the support platform.

[0013] The present invention is further configured such that the top of the support platform includes a first adsorption area and a second adsorption area located downstream of the first adsorption area, the adsorption holes include a first hole group located in the first adsorption area and a second hole group located in the second adsorption area, the bottom of the first adsorption area is provided with a first adsorption cover and a second adsorption cover in the shape of an upward-opening cover, all the first hole groups are in communication with the first adsorption cover, the bottom of the first adsorption cover is connected to a first control tube, all the second hole groups are in communication with the second adsorption cover, the bottom of the second adsorption cover is connected to a second control tube;

[0014] The movable frame is equipped with a second drive mechanism for raising and lowering the separating roller, and a stripping roller is also horizontally arranged on the movable frame, with the stripping roller located upstream of the separating roller.

[0015] The present invention is further configured such that the peeling roller is hollow, and the side wall of the peeling roller is provided with a plurality of air outlets, and one end of the peeling roller is connected to an air pipe.

[0016] The present invention is further configured such that the second driving mechanism includes a second cylinder body vertically arranged on the movable frame, and a lifting seat is provided at the top of the piston rod of the second cylinder body, and the separating roller is rotatably connected to the lifting seat.

[0017] The present invention is further configured such that an auxiliary roller is horizontally rotatably arranged on the movable frame, the auxiliary roller is located between the peeling roller and the separating roller, and the top of the auxiliary roller is higher than the top of the peeling roller. The auxiliary roller is used to act upward on the lower side of the PI film and make the PI film adhere to the adsorption mesh.

[0018] The present invention is further configured such that a translation rail is horizontally arranged at the top of the inner wall of the negative pressure shroud, a translation frame is movably fastened to the bottom of the translation rail, a bonding frame is horizontally arranged at the bottom of the translation frame, a third cylinder is vertically arranged at both ends of the bonding frame, a bonding seat is arranged at the bottom of the piston rod of the third cylinder, a bonding roller is horizontally rotatably arranged between the two bonding seats, the bottom of the bonding roller is lower than the bottom of the bonding seat, a translation screw is horizontally arranged through the negative pressure shroud and rotatably connected to the negative pressure shroud, a motor for driving the translation screw is arranged outside the negative pressure shroud, and the translation screw passes through the translation frame and is threadedly engaged with the translation frame.

[0019] The present invention is further configured such that the first driving mechanism includes a seat body disposed at both ends of the movable rail, a lead screw is rotatably disposed between the two seats, a motor is externally connected to the lead screw, and the lead screw passes through the movable frame and is threadedly engaged with the movable frame.

[0020] The present invention is further configured such that the first driving mechanism includes a linear motor, or:

[0021] An electric actuator is horizontally mounted on the movable rail, and the piston rod of the electric actuator is connected to the movable frame.

[0022] Compared with existing technologies, this utility model provides a film-tearing structure. Before tearing the film, the release paper and PI film must first be placed on a support platform. This placement can be done manually by workers or by transferring them using a negative pressure mesh box, a robotic arm, or suction cups. Then, a negative pressure is generated in the suction holes, stably adsorbing the release paper onto the support platform. Subsequently, the first drive mechanism drives the movable frame to move on the movable track, causing the adhesive layer of the separating roller (which can be tape, double-sided tape, or other adhesive structures, such as viscous rubber) to act on the top of the upstream end of the PI film. As the movable frame continues to move downstream, the adhesive layer tears the upstream end of the PI film. Because the release paper is positioned by the suction holes, the upstream end of the PI film can then be separated from the release paper.

[0023] After the movable frame moves forward a certain distance, it moves backward, separating the separating roller from the PI film. The negative pressure screen then descends, causing the adsorption mesh to adhere to the top of the PI film. At this point, the adsorption holes continue their adsorption function, while the negative pressure pipe creates negative pressure inside the negative pressure chamber. This allows the negative pressure screen to move the PI film upward, separating it from the release paper. A negative pressure pump is externally connected to the negative pressure pipe. The moving structure of the negative pressure screen can be a robotic arm or a three-axis robotic arm, used to move the screen and move the PI film onto the FPC on the side. Because the end of the PI film in this application is separated from the release paper by the separating roller and the adhesive layer, the subsequent separation of the entire PI film from the release paper is relatively convenient. Furthermore, the easy separation of the PI film from the release paper also facilitates subsequent film application, resulting in better production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0025] Figure 2 yes Figure 1 Enlarged view of section A;

[0026] Figure 3 yes Figure 1 Enlarged view of section B;

[0027] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0028] Figure 5 yes Figure 4 Enlarged view of section C.

[0029] The components are as follows: 1. Support platform; 2. Adsorption holes; 2a. First hole group; 2b. Second hole group; 3. Movable rail; 4. Movable frame; 5. Separation roller; 6. Adhesive layer; 7. Negative pressure cover; 8. Negative pressure pipe; 9. First cylinder; 10. First adsorption zone; 11. Second adsorption zone; 12. Peeling roller; 13. Air outlet; 14. Air pipe; 15. Second cylinder; 16. Lifting seat; 17. Auxiliary roller; 18. Translation rail; 19. Translation frame; 20. Bonding frame; 21. Third cylinder; 22. Bonding seat; 23. Bonding roller; 24. Translation screw. Detailed Implementation

[0030] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the tear-off film structure proposed in this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0031] A tear-off film structure, such as Figures 1 to 5 As shown, it includes:

[0032] Support platform 1, wherein a plurality of adsorption holes 2 are provided on the support platform 1;

[0033] Movable rail 3, on which a movable frame 4 is horizontally and movably mounted;

[0034] A first driving mechanism is used to drive the movable frame 4 to move along the length direction of the movable rail 3;

[0035] The separating roller 5 is rotatably connected to the movable frame 4. An adhesive layer 6 is provided on the outer wall of the separating roller 5. The adhesive layer 6 is used to separate the PI film from the release paper adsorbed by the adsorption hole 2 after adhering to the upstream end of the PI film. It should also be understood that the PI film and the release paper are not the objects of protection claimed in this application. They are only mentioned here for auxiliary explanation.

[0036] The negative pressure mesh box includes a negative pressure cover 7 with an opening facing downwards and a porous adsorption mesh connected to the bottom of the negative pressure cover 7. A negative pressure pipe 8 is connected to the negative pressure mesh box.

[0037] Two movable rails 3 are provided, located on both sides of the support platform 1. A first cylinder 9 for raising and lowering the support platform 1 is provided at the bottom of the support platform 1.

[0038] The top of the support platform 1 includes a first adsorption area 10 and a second adsorption area 11 located downstream of the first adsorption area 10. The adsorption holes 2 include a first hole group 2a located in the first adsorption area 10 and a second hole group 2b located in the second adsorption area 11. The bottom of the first adsorption area 10 is provided with a first adsorption cover and a second adsorption cover in the shape of an upward-opening cover. All the first hole groups 2a are connected to the first adsorption cover. The bottom of the first adsorption cover is connected to a first control tube. All the second hole groups 2b are connected to the second adsorption cover. The bottom of the second adsorption cover is connected to a second control tube.

[0039] The movable frame 4 is provided with a second drive mechanism for raising and lowering the separation roller 5. The movable frame 4 is also provided with a stripping roller 12 horizontally, which is located upstream of the separation roller 5.

[0040] The peeling roller 12 is hollow, and several air outlets 13 are provided on the side wall of the peeling roller 12. An air pipe 14 is connected to one end of the peeling roller 12.

[0041] The second drive mechanism includes a second cylinder 15 vertically mounted on the movable frame 4, and a lifting seat 16 is provided on the top of the piston rod of the second cylinder 15. The separating roller 5 is rotatably connected to the lifting seat 16.

[0042] An auxiliary roller 17 is also horizontally rotatably mounted on the movable frame 4. The auxiliary roller 17 is located between the peeling roller 12 and the separating roller 5, and the top of the auxiliary roller 17 is higher than the top of the peeling roller 12. The auxiliary roller 17 is used to act upward on the lower side of the PI film and make the PI film adhere to the adsorption mesh.

[0043] A horizontal translation rail 18 is provided at the top of the inner wall of the negative pressure cover 7. A translation frame 19 is movably fastened to the bottom of the translation rail 18. A bonding frame 20 is horizontally provided at the bottom of the translation frame 19. A third cylinder 21 is vertically provided at both ends of the bonding frame 20. A bonding seat 22 is provided at the bottom of the piston rod of the third cylinder 21. A bonding roller 23 is horizontally rotatably provided between the two bonding seats 22. The bottom of the bonding roller 23 is lower than the bottom of the bonding seat 22. A translation screw 24 is horizontally passed through the negative pressure cover 7 and rotatably connected to the negative pressure cover 7. A motor for driving the translation screw 24 is provided outside the negative pressure cover 7. The translation screw 24 passes through the translation frame 19 and is threadedly engaged with the translation frame 19.

[0044] The first driving mechanism includes a seat body disposed at both ends of the movable rail 3, a lead screw rotatably disposed between the two seats, a motor connected to the lead screw, the lead screw passing through the movable frame 4 and threadedly engaging with the movable frame 4.

[0045] This utility model provides a film-tearing structure. Before tearing, the release paper and PI film are first placed on the support platform 1. This placement can be done manually by workers or by transferring them using a negative pressure mesh box, a robotic arm, or suction cups. Then, a negative pressure is generated in the adsorption hole 2, which stably adsorbs the release paper onto the support platform 1. Subsequently, the first drive mechanism drives the movable frame 4 to move on the movable rail 3, causing the adhesive layer 6 of the separating roller 5 (which can be tape, double-sided tape, or other adhesive structures, such as sticky rubber) to act on the top of the upstream end of the PI film. As the movable frame 4 continues to move downstream, the adhesive layer 6 tears the upstream end of the PI film. Because the release paper is positioned by the adsorption hole 2, the upstream end of the PI film can then be separated from the release paper.

[0046] After the movable frame 4 moves forward a certain distance, it moves backward, causing the separating roller 5 to separate from the PI film. The negative pressure screen then descends, causing the adsorption mesh to adhere to the top of the PI film. At this time, the adsorption holes 2 continue their adsorption function, while the negative pressure pipe 8 creates negative pressure inside the negative pressure cover 7. This allows the negative pressure screen to move the PI film upward, separating it from the release paper. A negative pressure pump is externally connected to the negative pressure pipe 8. The moving structure of the negative pressure screen can be a robotic arm or a three-axis robotic arm, used to move the screen and move the PI film onto the FPC on the side. Because the end of the PI film in this application is separated from the release paper by the separating roller 5 and the adhesive layer 6, the subsequent separation of the entire PI film from the release paper is relatively convenient. Furthermore, the easy separation of the PI film from the release paper facilitates subsequent film application, resulting in better production efficiency.

[0047] In actual use, after the release paper is adsorbed by the support platform 1, both movable frames 4 move towards the support platform 1. At this time, the peeling roller 12, separating roller 5, and auxiliary roller 17 are all higher than the PI film. When the separating roller 5 just reaches above the upstream end of the PI film, the second cylinder 15 drives the lifting seat 16 and the separating roller 5 to descend (or the first cylinder 9 raises the support platform 1), causing the adhesive layer 6 to adhere to the upstream end of the PI film (at this time, only the adhesive layer 6 acts on the PI film, and the peeling roller 12 and auxiliary roller 17 are both higher than the PI film). Then the movable frames 4 continue to move downstream, at which point the PI film is torn apart after being held by the adhesive layer 6.

[0048] After the movable frame 4 moves a certain distance, it moves backward, causing the adhesive layer 6 to separate from the PI film. Then, the second cylinder 15 raises the separating roller 5 (and / or the first cylinder 9 lowers the support platform 1), ensuring that the adhesive layer 6 does not subsequently act on the PI film. Next, the first cylinder 9 raises the support platform 1. During the action of the separating roller 5, the negative pressure pumps connected to the first and second control pipes are both operational, thus maintaining negative pressure in both the first hole group 2a and the second hole group 2b, ensuring the position of the release paper at each location. After the support platform 1 is raised, the negative pressure pumps connected to the first and second control pipes stop working. The first control pipe ensures that the negative pressure adsorption force of the first adsorption area 10 is sufficiently large, thus ensuring the positional stability of the release paper when tearing the PI film. The second adsorption area 11, with its larger area, requires only a relatively smaller adsorption force.

[0049] Then, the negative pressure hood 7 descends until the adsorption mesh adheres to the PI film. The adsorption mesh is porous, and the PI film can cover the pores on the adsorption mesh to form a negative pressure and stably separate and transfer the PI film. At the same time, it can also prevent the release paper from being adsorbed. Then, a negative pressure is formed in the negative pressure tube 8, and the negative pressure hood 7 rises. At this time, the PI film is adsorbed and rises, but the release paper at the upstream end separates from the PI film under the action of gravity, while the release paper at the downstream end remains in contact with the PI film. Thus, the release paper at the upstream end is in an inclined state (the release paper and the PI film form a horizontal Y-shape).

[0050] Then, the movable frame 4 moves towards the PI film again and adheres to the upper side of the raised release paper via the peeling roller 12. The peeling roller 12 continues to move downstream to promote the separation of the PI film and the release paper. At the same time, the blowing pipe 14 blows plasma air into the peeling roller 12, which is then blown out through the blowing nozzle 13 and acts on the PI film and the release paper (the blowing nozzle 13 is located at multiple angles) to eliminate the static electricity of the PI film. At the same time, the auxiliary roller 17 applies an upward force to the lower side of the PI film, and the bonding roller 23 acts on the upper side of the adsorption mesh, and the bonding roller 23 is located above the auxiliary roller 17. The two clamp the PI film and the adsorption mesh, thereby improving the adsorption stability of the PI film and the adsorption mesh. Meanwhile, the movable frame 4 moves downstream, and the translation screw 24 drives the translation frame 19, the bonding frame 20, and the bonding roller 23 to move downstream at the same speed. After the PI film adsorption is completed, the third cylinder 21 raises the bonding seat 22 and bonding roller 23 and then resets to the upstream end of the adsorption cover, waiting for the next use. The resetting process does not affect the adsorption mesh.

[0051] In the second embodiment, the first drive mechanism includes a linear motor.

[0052] In the third embodiment, the first drive mechanism includes an electric actuator, which is horizontally disposed on the movable rail 3, and the piston rod of the electric actuator is connected to the movable frame 4.

[0053] In the fourth embodiment, there are pulleys at both ends of the inner side of the movable rail 3. A belt is sleeved on the outer wall of the two opposing pulleys. At the same time, a motor is connected to the pulleys, and the belt is connected to the movable frame 4. In this way, the movable frame 4 can be driven to move back and forth by the belt.

[0054] In the fifth embodiment, the adsorption situation at the top of the support platform 1 is the same, that is, it is not divided into a first adsorption area and a second adsorption area, but it is necessary to ensure that there is sufficient suction force on the upstream end of the release paper when the PI film is torn open.

[0055] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0056] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A tear-off film structure, characterized in that, include: A support platform (1) is provided with a plurality of adsorption holes (2); Movable rail (3), on which a movable frame (4) is horizontally and movably mounted; A first driving mechanism is used to drive the movable frame (4) to move along the length direction of the movable rail (3); Separating roller (5), the separating roller (5) is rotatably connected to the movable frame (4), and an adhesive layer (6) is provided on the outer wall of the separating roller (5). The adhesive layer (6) is used to separate the PI film from the release paper adsorbed by the adsorption hole (2) after adhering to the upstream end of the PI film. The negative pressure mesh box includes a negative pressure cover (7) with an opening facing downward and a porous adsorption mesh connected to the bottom of the negative pressure cover (7). A negative pressure pipe (8) is connected to the negative pressure mesh box.

2. The tear-off film structure according to claim 1, characterized in that, Two movable rails (3) are provided, and the two movable rails (3) are located on both sides of the support platform (1).

3. The tear-off film structure according to claim 1, characterized in that, The bottom of the support platform (1) is provided with a first cylinder (9) for raising and lowering the support platform (1).

4. The tear-off film structure according to claim 3, characterized in that, The top of the support platform (1) includes a first adsorption area (10) and a second adsorption area (11) located downstream of the first adsorption area (10). The adsorption hole (2) includes a first hole group (2a) located in the first adsorption area (10) and a second hole group (2b) located in the second adsorption area (11). The bottom of the first adsorption area (10) is provided with a first adsorption cover and a second adsorption cover with an upward opening. All the first hole groups (2a) are connected to the first adsorption cover. The bottom of the first adsorption cover is connected to a first control tube. All the second hole groups (2b) are connected to the second adsorption cover. The bottom of the second adsorption cover is connected to a second control tube. The movable frame (4) is provided with a second drive mechanism for raising and lowering the separation roller (5). A stripping roller (12) is also horizontally arranged on the movable frame (4), and the stripping roller (12) is located upstream of the separation roller (5).

5. A tear-off film structure according to claim 4, characterized in that, The peeling roller (12) is hollow, and the side wall of the peeling roller (12) is provided with a number of air outlets (13). One end of the peeling roller (12) is connected to an air pipe (14).

6. The tear-off film structure according to claim 4, characterized in that, The second drive mechanism includes a second cylinder (15) vertically mounted on the movable frame (4), and a lifting seat (16) is provided on the top of the piston rod of the second cylinder (15). The separating roller (5) is rotatably connected to the lifting seat (16).

7. A tear-off film structure according to claim 4, characterized in that, An auxiliary roller (17) is also horizontally rotatably mounted on the movable frame (4). The auxiliary roller (17) is located between the peeling roller (12) and the separating roller (5), and the top of the auxiliary roller (17) is higher than the top of the peeling roller (12). The auxiliary roller (17) is used to act upward on the lower side of the PI film and make the PI film adhere to the adsorption mesh.

8. A tear-off film structure according to claim 7, characterized in that, A horizontal translation rail (18) is provided on the top of the inner wall of the negative pressure cover (7). A translation frame (19) is movably fastened to the bottom of the translation rail (18). A bonding frame (20) is provided horizontally at the bottom of the translation frame (19). A third cylinder (21) is provided vertically at both ends of the bonding frame (20). A bonding seat (22) is provided at the bottom of the piston rod of the third cylinder (21). A bonding roller (23) is provided horizontally between the two bonding seats (22). The bottom of the bonding roller (23) is lower than the bottom of the bonding seat (22). A translation screw (24) is provided horizontally through the negative pressure cover (7) and rotatably connected to the negative pressure cover (7). A motor for driving the translation screw (24) is provided outside the negative pressure cover (7). The translation screw (24) passes through the translation frame (19) and is threadedly engaged with the translation frame (19).

9. A tear-off film structure according to claim 1, characterized in that, The first driving mechanism includes a seat body disposed at both ends of the movable rail (3), a lead screw is rotatably disposed between the two seats, a motor is externally connected to the lead screw, the lead screw passes through the movable frame (4) and is threadedly engaged with the movable frame (4).

10. A tear-off film structure according to claim 1, characterized in that, The first drive mechanism includes a linear motor, or: An electric actuator is horizontally mounted on the movable rail (3), and the piston rod of the electric actuator is connected to the movable frame (4).

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