Unwinding device for PTFE film

Abstract

The utility model discloses a PTFE (polytetrafluoroethylene) film unreeling device which comprises a rack, two guide plates, an overturning disc, a tensioning assembly and a guide roller, the rack is used for supporting all parts and a film body, the two guide plates are both fixedly connected to the rack, a guide column is connected between the two guide plates in a sliding and abutting mode, the overturning disc is arranged on the guide column, and the tensioning assembly is arranged on the overturning disc. The two ends of the guide column are fixedly connected with a first overturning plate and a second overturning plate correspondingly, an unwinding roller is clamped between the upper end of the first overturning plate and the upper end of the second overturning plate, a film body is wound around the unwinding roller, the overturning disc is rotationally connected to the rack, the first overturning plate is provided with an overturning groove, and the overturning groove is formed in the second overturning plate. The non-circle-center position of the overturning disc abuts against the inner wall of the overturning groove, and the side, away from the first overturning plate, of the overturning disc is connected with a first motor. According to the technical scheme, the stability in the unwinding process is improved, the quality problem caused by local excessive stretching or loosening is reduced, and therefore the overall performance of a thin film body is improved, and the service life of the thin film body is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of unwinding devices for PTFE films, and in particular to an unwinding device for PTFE films. Background Technology

[0002] PTFE membrane (polytetrafluoroethylene membrane) is a thin film made of polytetrafluoroethylene (PTFE). PTFE is a high-performance plastic with excellent chemical stability, electrical insulation, high-temperature resistance, and aging resistance. The working principle of the unwinding device is mainly based on a tension control system. The PTFE membrane in the roll is slowly unwound by the drive system. As the membrane material is unwound, the tension control system adjusts the tension in real time according to the operating state of the membrane material to ensure that the membrane material is stable and not stretched or compressed.

[0003] In existing film unwinding equipment, tensioning devices are typically installed to ensure the film surface remains flat. The main function of these tensioning devices is to prevent wrinkles or slack in the film by applying a certain tension. However, traditional tensioning devices are often fixed, meaning the tension remains constant throughout the unwinding process. This fixed design may work well in the initial stages of film unwinding, but as the film gradually unwinds and its thickness decreases, the originally set tension becomes insufficient to meet the changing needs of the film. As the film thickness decreases, the required tension should also be adjusted. If the tensioning device maintains a fixed tension, two undesirable outcomes may occur. First, excessive tension will overstretch the film surface, causing it to become excessively taut. This over-tensioning can lead to cracks, breaks, or uneven surface textures. Second, insufficient tension may cause the film to gradually slack, producing wrinkles or wavy defects, affecting the film's flatness and quality of use. Summary of the Invention

[0004] The main purpose of this invention is to provide an unwinding device for PTFE films, which aims to improve the stability of the unwinding process, reduce quality problems caused by local overstretching or slack, and thus improve the overall performance and service life of the film body.

[0005] To achieve the above objectives, this utility model proposes an unwinding device for PTFE film, comprising:

[0006] The frame serves to support the various components and the film body;

[0007] Two guide plates are fixedly connected to the frame. A guide post slides between the two guide plates and abuts against them. A first flip plate and a second flip plate are fixedly connected to both ends of the guide post. An unwinding roller is engaged between the upper ends of the first flip plate and the second flip plate. A film body is wrapped on the unwinding roller.

[0008] A rotating disc is rotatably connected to the frame. A rotating groove is provided on the first rotating plate. The non-center part of the rotating disc abuts against the inner wall of the rotating groove. A first motor is connected to the side of the rotating disc away from the first rotating plate.

[0009] Tensioning components are used to enhance the tension on the film;

[0010] Guide rollers are rotatably mounted on the frame.

[0011] In one possible implementation, the tensioning assembly includes:

[0012] A receiving plate, which is fixedly connected to the frame;

[0013] Two limiting posts are provided, each of which slides and abuts against the receiving plate, and the lower ends of the two limiting posts are fixedly connected to the limiting plate.

[0014] The tensioning roller is disposed on the lower side of the limiting plate;

[0015] The second motor is fixedly connected to the frame, and the drive shaft of the second motor is fixedly connected to an adjustment plate. A transmission plate is hinged between the non-center part of the adjustment plate and the limiting plate.

[0016] In one possible implementation, two guide plates are fixedly connected to the lower side of the limiting plate, and each guide plate is provided with a locking groove. The two ends of the tensioning roller abut against the inner walls of the locking grooves on both sides.

[0017] In one possible implementation, a reset column is fixedly connected to the side of the limiting plate away from the second motor, a reset block is slidably connected to the reset column, the reset block is rotatably connected to the adjacent tensioning roller, and a reset spring is sleeved on the reset column, with the two ends of the reset spring abutting against the limiting plate and the reset block respectively.

[0018] In one possible implementation, a support plate is fixedly connected to the bottom surface of the frame, a drive cylinder is fixedly connected to the support plate, a connecting plate is fixedly connected to the telescopic shaft of the drive cylinder, and the end of the connecting plate away from the drive cylinder is fixedly connected to a guide column.

[0019] In one possible implementation, a reinforcing plate is fixedly connected between the first flip plate and the second flip plate, and a third motor is fixedly connected to the reinforcing plate.

[0020] The first flip plate is rotatably connected to a first gear and a second gear. The first gear is coaxially and fixedly connected to the third motor drive shaft, and the first gear meshes with the second gear.

[0021] A third gear is fixedly connected to one end of the unwinding roller near the first flipping plate, and the third gear meshes with the second gear.

[0022] This invention utilizes the flipping action of the first and second flipping plates on the unwinding roller, along with the coordination of the tensioning assembly, to increase the tensile force in multiple areas of the film body surface. This achieves uniform tension distribution, reduces wrinkles and waviness on the film body surface, and improves the mechanical properties, surface quality, and processability of the film body. It also enhances the stability of the unwinding process, reduces quality problems caused by localized overstretching or slack, thereby improving the overall performance and service life of the film body. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is an enlarged schematic diagram of the structure of an unwinding device for PTFE film according to the present invention;

[0025] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0026] Figure 3 This is a partially enlarged schematic diagram of an unwinding device for PTFE film according to the present invention;

[0027] Figure 4 for Figure 3 Enlarged diagram of B in the diagram.

[0028] Explanation of icon numbers:

[0029] 1. Film body; 11. Frame; 12. Guide plate; 13. Guide post; 14. First flip plate; 141. Flip groove; 15. Second flip plate; 16. Unwinding roller; 17. Flip disc; 18. First motor; 19. Guide roller; 21. Receiving plate; 22. Limiting post; 23. Limiting plate; 231. Guide plate; 232. Locking groove; 24. Tensioning roller; 25. Second motor; 26. Adjusting disc; 27. Transmission plate; 28. Reset post; 29. ​​Reset block; 210. Reset spring; 31. Support plate; 32. Drive cylinder; 33. Connecting plate; 41. Reinforcing plate; 42. Third motor; 43. First gear; 44. Second gear; 45. Third gear.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] This invention proposes an unwinding device for PTFE film.

[0033] Reference Figures 1 to 4 , Figure 1 This is an enlarged schematic diagram of the structure of an unwinding device for PTFE film according to the present invention; Figure 2 for Figure 1 Enlarged diagram of A in the middle; Figure 3 This is a partially enlarged schematic diagram of an unwinding device for PTFE film according to the present invention; Figure 4 for Figure 3 Enlarged diagram of B in the diagram.

[0034] In this embodiment of the utility model, a PTFE film unwinding device includes a frame 11, two guide plates 12, a flipping plate 17, a tensioning assembly, and a guide roller 19. The frame 11 is used to support the various components and the film body 1. The two guide plates 12 are fixedly connected to the frame 11. A guide post 13 slides and abuts between the two guide plates 12. A first flipping plate 14 and a second flipping plate 15 are fixedly connected to both ends of the guide post 13. An unwinding roller 16 is engaged between the upper ends of the first flipping plate 14 and the second flipping plate 15. The film body 1 is wrapped on the unwinding roller 16. The flipping plate 17 is rotatably connected to the frame 11. A flipping groove 141 is opened on the first flipping plate 14. The non-center part of the flipping plate 17 abuts against the inner wall of the flipping groove 141. A first motor 18 is connected to the side of the flipping plate 17 away from the first flipping plate 14. The tensioning assembly is used to improve the tension of the film. The guide roller 19 is rotatably mounted on the frame 11.

[0035] The first flip plate 14 and the second flip plate 15 reciprocate left and right via the flip disk 17, which in turn drives the unwinding roller 16 to stretch the unwound film body 1. Combined with the tensioning assembly, this stretching action makes the surface of the film body 1 smoother and more uniform, reducing surface defects and irregularities, and improving the appearance quality and performance of the film body 1. Simultaneously, by applying tensile force to multiple areas, the tension of the film body 1 can be effectively and evenly distributed. Compared to a single tensioning device, this zoned stretching avoids damage or uneven stretching caused by excessive local tension in certain areas, ensuring the overall flatness and consistency of the film body 1.

[0036] In summary, during the unwinding process of the film body 1, the flipping action of the first flipping plate 14 and the second flipping plate 15 on the unwinding roller 16, along with the cooperation of the tensioning assembly, increases the tensile force in multiple areas of the film body 1 surface. This achieves uniform tension distribution, reduces wrinkles and waviness on the film body 1 surface, and improves the mechanical properties, surface quality, and processability of the film body 1. It also enhances the stability of the unwinding process, reduces quality problems caused by localized overstretching or slack, thereby improving the overall performance and service life of the film body 1.

[0037] Reference Figures 1 to 4 The tensioning assembly includes:

[0038] The receiving plate 21 is fixedly connected to the frame 11;

[0039] Two limiting posts 22, each of which slides and abuts against the receiving plate 21, and the lower ends of the two limiting posts 22 are fixedly connected to the limiting plate 23;

[0040] Tensioning roller 24 is disposed on the lower side of limiting plate 23;

[0041] The second motor 25 is fixedly connected to the frame 11. The drive shaft of the second motor 25 is fixedly connected to the adjustment plate 26. The non-center part of the adjustment plate 26 is hinged to the limit plate 23 with the transmission plate 27.

[0042] The tensioning assembly, driven by the adjusting disc 26, moves the limiting plate 23 up and down reciprocally. This causes the tensioning roller 24 connected to the limiting plate 23 to vibrate and stretch the surface of the film body 1. Combined with the flipping operation of the first flipping plate 14 and the second flipping plate 15, the tension of the film is effectively and evenly distributed by applying tension in multiple areas. Compared to a single tensioning device, this zoned stretching avoids damage or uneven stretching caused by excessive local tension in certain areas, ensuring the overall flatness and consistency of the film. Furthermore, when the film is subjected to tension only in a certain area, local overstretching or relaxation can easily occur, leading to wrinkles or waves. By applying tension in multiple areas, the tension of each part can be better balanced, reducing wrinkles and waves on the film surface and improving the flatness and stability of unwinding.

[0043] Reference Figure 1 and Figures 3 to 4 Two guide plates 231 are fixedly connected to the lower side of the limiting plate 23. Each guide plate 231 is provided with a locking groove 232. The two ends of the tension roller 24 abut against the inner wall of the locking groove 232 on both sides respectively.

[0044] The tensioning roller 24 can exert a certain stretching effect on the surface of the film body 1 through its own gravity. The movable tensioning roller 24 can provide a stable tensioning effect on the film body 1.

[0045] Reference Figures 3 to 4 A reset column 28 is fixedly connected to the side of the limiting plate 23 away from the second motor 25. A reset block 29 is slidably connected to the reset column 28. The reset block 29 is rotatably connected to the adjacent tension roller 24. A reset spring 210 is sleeved on the reset column 28. The two ends of the reset spring 210 abut against the limiting plate 23 and the reset block 29 respectively.

[0046] When the weight of the tension roller 24 is insufficient to stretch the surface of the film body 1, a return spring 210 is added to one side of the tension roller 24. The spring force of the return spring 210 drives the tension roller 24 downward, so that the tension roller 24 can stretch the surface of the film body 1 sufficiently. As the unwound film body 1 gradually decreases, the tension roller 24 can still tension the film body 1.

[0047] Reference Figures 1 to 2 A support plate 31 is fixedly connected to the bottom surface of the frame 11. A drive cylinder 32 is fixedly connected to the support plate 31. A connecting plate 33 is fixedly connected to the telescopic shaft of the drive cylinder 32. The end of the connecting plate 33 away from the drive cylinder 32 is fixedly connected to the guide column 13.

[0048] The drive cylinder 32 limits the position of the first tilting plate 14 and the second tilting plate 15. At the same time, the drive cylinder 32 can drive the guide column 13 to move the lower ends of the first tilting plate 14 and the second tilting plate 15 on both sides toward the tensioning assembly. Before the drive cylinder 32 works, the tilting disk 17 stops working. At this time, the first tilting plate 14 and the second tilting plate 15 will rotate around the hinge point with the tilting disk 17, so that the upper ends of the first tilting plate 14 and the second tilting plate 15 tilt away from the tensioning assembly, thereby making it convenient for workers to pick up and replace the unwinding roller 16.

[0049] Reference Figures 1 to 2 A reinforcing plate 41 is fixedly connected between the first flip plate 14 and the second flip plate 15. A third motor 42 is fixedly connected to the reinforcing plate 41. A first gear 43 and a second gear 44 are rotatably connected to the first flip plate 14. The first gear 43 is coaxially fixedly connected to the drive shaft of the third motor 42. The first gear 43 meshes with the second gear 44. A third gear 45 is fixedly connected to one end of the unwinding roller 16 near the first flip plate 14. The third gear 45 meshes with the second gear 44.

[0050] The unwinding roller 16 rotates due to the winding force, but this rotational force counteracts the weight of the unwinding roller 16 itself. When the unwinding roller 16 gets stuck with the frame 11, the film body 1 will be damaged due to excessive stretching. Therefore, a third gear 45 is installed on the unwinding roller 16 so that after installation, the unwinding roller 16 rotates stably under the drive of the third motor 42, thereby enabling the film body 1 to be unwound stably. At the same time, the second gear 44 is provided to leave enough space between the third motor 42 and the unwinding roller 16 to prevent them from interfering with each other during operation.

[0051] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A PTFE film unwinding device, characterized in that, include: The frame (11) is used to support the various components and the film body (1); Two guide plates (12) are fixedly connected to the frame (11). A guide post (13) slides between the two guide plates (12). A first flip plate (14) and a second flip plate (15) are fixedly connected to both ends of the guide post (13). An unwinding roller (16) is engaged between the upper ends of the first flip plate (14) and the second flip plate (15). A film body (1) is wrapped on the unwinding roller (16). A rotating disk (17) is rotatably connected to a frame (11). A rotating groove (141) is provided on the first rotating plate (14). The non-center part of the rotating disk (17) abuts against the inner wall of the rotating groove (141). A first motor (18) is connected to the side of the rotating disk (17) away from the first rotating plate (14). Tensioning components are used to enhance the tension on the film; Guide roller (19) is rotatably mounted on frame (11).

2. The unwinding device for PTFE film according to claim 1, characterized in that, The tensioning component includes: The receiving plate (21) is fixedly connected to the frame (11); Two limiting posts (22) are provided, each of which slides and abuts against the receiving plate (21), and the lower ends of the two limiting posts (22) are fixedly connected to a limiting plate (23); Tensioning roller (24), said tensioning roller (24) is disposed on the lower side of the limiting plate (23); The second motor (25) is fixedly connected to the frame (11). The drive shaft of the second motor (25) is fixedly connected to the adjustment plate (26). The non-center part of the adjustment plate (26) is hinged to the limit plate (23) with a transmission plate (27).

3. The unwinding device for PTFE film according to claim 2, characterized in that, Two guide plates (231) are fixedly connected to the lower side of the limiting plate (23). Each guide plate (231) has a slot (232) on it. The two ends of the tension roller (24) abut against the inner wall of the slot (232) on both sides respectively.

4. The unwinding device for PTFE film according to claim 3, characterized in that, A reset column (28) is fixedly connected to the side of the limiting plate (23) away from the second motor (25). A reset block (29) is slidably connected to the reset column (28). The reset block (29) is rotatably connected to the adjacent tension roller (24). A reset spring (210) is sleeved on the reset column (28). The two ends of the reset spring (210) abut against the limiting plate (23) and the reset block (29) respectively.

5. The unwinding device for PTFE film according to claim 1, characterized in that, A support plate (31) is fixedly connected to the bottom surface of the frame (11), and a drive cylinder (32) is fixedly connected to the support plate (31). A connecting plate (33) is fixedly connected to the telescopic shaft of the drive cylinder (32), and the end of the connecting plate (33) away from the drive cylinder (32) is fixedly connected to the guide column (13).

6. The unwinding device for PTFE film according to claim 1, characterized in that, A reinforcing plate (41) is fixedly connected between the first flip plate (14) and the second flip plate (15), and a third motor (42) is fixedly connected to the reinforcing plate (41); The first flip plate (14) is rotatably connected with a first gear (43) and a second gear (44). The first gear (43) is coaxially fixedly connected to the drive shaft of the third motor (42), and the first gear (43) meshes with the second gear (44). The unwinding roller (16) is fixedly connected to a third gear (45) at one end near the first flip plate (14), and the third gear (45) meshes with the second gear (44).

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