A film rewinding device

Abstract

This utility model relates to the field of film rewinding technology, specifically a film rewinding device. The device includes a base, on one side of which an unwinding roller and a take-up roller are rotatably mounted. A guide roller assembly is fixedly connected to another side of the base, located between the unwinding and take-up rollers. A cylinder with a film wound on its surface is fitted onto the side wall of the unwinding roller. The film passes through the guide roller assembly and its end is wound onto the take-up roller. Multiple sets of pressure blocks are slidably mounted on the side wall of the unwinding roller. An extrusion assembly is slidably mounted inside the unwinding roller, with the bottoms of the pressure blocks engaging with the extrusion assembly. By setting multiple radially adjustable pressure blocks driven by the extrusion assembly inside the unwinding roller, the extrusion assembly can be controlled to synchronously drive all pressure blocks to extend or retract radially. This allows the same unwinding roller to firmly clamp and support cylinders of various inner diameters, greatly improving the versatility of the equipment. The film exhibits better flatness and tension, resulting in improved film rewinding performance.

Description

Technical Field

[0001] The utility model relates to the field of film rewinding, and specifically relates to a film rewinding device. Background Technique

[0002] In the fields of film processing, packaging and printing, film rewinding is a basic and crucial process. The purpose is to slit or directly transfer a large roll and wide-width master roll film onto a drum of a specific specification to meet the requirements of subsequent transportation, storage or application.

[0003] Traditional film rewinding devices usually include an unwinding roller, a guide roller system and a winding roller. In actual operation, there are certain manufacturing tolerances in the inner diameter size of the paper tube or plastic tube used to carry the film. However, the diameter of the unwinding roller of existing equipment is usually fixed, which results in a gap between the barrel and the unwinding roller after installation. During film rewinding, the barrel will have a large coaxiality deviation and晃动 (it should be "vibration" here), the flatness and tightness of the film are not good, resulting in a poor film rewinding effect. Therefore, a film rewinding device is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a film rewinding device to solve the problems raised in the above background technique.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A film rewinding device includes a machine base. On one side of the machine base, an unwinding roller and a winding roller are rotatably installed, and a guide roller assembly is fixedly connected to one side of the machine base. The guide roller assembly is located between the unwinding roller and the winding roller. A barrel with a film wound on its surface is sleeved on the side wall of the unwinding roller. The film passes through the guide roller assembly and is wound on the winding roller at the end. A plurality of pressing blocks are slidably installed on the side wall of the unwinding roller, and an extrusion assembly is slidably installed inside the unwinding roller. The bottoms of the plurality of pressing blocks are all in extrusion fit with the extrusion assembly, and the plurality of pressing blocks are arranged in a circumferential array. The ends of the plurality of pressing blocks are all in extrusion fit with the inner wall of the barrel.

[0007] Preferably, the guide roller assembly includes a first guide roller, a second guide roller, a central roller, a third guide roller and a fourth guide roller. The first guide roller, the second guide roller, the central roller, the third guide roller and the fourth guide roller are all located between the unwinding roller and the winding roller. The first guide roller and the second guide roller are located between the unwinding roller and the central roller. The third guide roller and the fourth guide roller are located between the central roller and the winding roller;

[0008] One side of the machine base is fixedly connected with a bracket. One end of the bracket is rotatably installed with a thick roller between the bracket and the machine base. The thick roller is located on one side of the fourth guide roller and below the winding roller.

[0009] Preferably, a plurality of sliding grooves are formed on the side wall of the unwinding roller. The cross-sectional shapes of the plurality of sliding grooves are all set to be "convex" shaped. One end of the pressing block is fixedly connected with a protrusion, and the protrusion slides in the sliding groove.

[0010] Preferably, the extrusion assembly includes multiple sets of connecting plates, which slide in multiple sets of grooves respectively. Multiple sets of driving blocks are fixed to one side wall of each set of connecting plates. Multiple sets of grooves are formed at the bottom of each set of pressing blocks. The multiple sets of driving blocks are extruded and engaged with the inner walls of the multiple sets of grooves respectively.

[0011] Preferably, one end of the unwinding roller has multiple sets of slots, and one end of each of the multiple sets of connecting plates passes through the sliding groove and is fixedly connected to a sliding plate. The multiple sets of sliding plates slide in the multiple sets of slots respectively.

[0012] Preferably, multiple sets of sliding plates are fixedly connected by a second connecting plate to form a ring. A connecting groove is provided between multiple sets of slots. The second connecting plate slides in the connecting groove. A driving plate is fixedly connected to the middle of the ring. The driving plate slides in the unwinding roller. A cylinder is fixedly connected in the unwinding roller. The output end of the cylinder is fixedly connected to the driving plate.

[0013] The beneficial effects of this utility model are:

[0014] This invention incorporates multiple radially adjustable pressure blocks driven by an extrusion assembly inside the unwinding roller. By controlling the extrusion assembly, all pressure blocks can be driven to extend or retract radially simultaneously. This allows the same unwinding roller to firmly clamp and support cylinders with various inner diameters, greatly improving the versatility of the equipment. The film exhibits better flatness and tension, resulting in improved film rewinding performance. Attached Figure Description

[0015] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the installation of the rewinding film of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the vertical cross-section of the unwinding roller of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the unwinding roller of this utility model;

[0020] Figure 5 This is a schematic diagram of the extrusion assembly structure of this utility model;

[0021] The attached figures are labeled as follows:

[0022] 1. Base; 2. Unwinding roll; 3. Guide roll one; 4. Guide roll two; 5. Central roll; 6. Guide roll three; 7. Guide roll four; 8. Support; 9. Coarse roll; 10. Rewinding roll; 11. Pressing block; 12. Cylinder; 13. Slide groove; 14. Protrusion; 15. Groove; 16. Connecting plate one; 17. Drive block; 18. Slide plate; 19. Connecting plate two; 20. Drive plate; 22. Cylinder; 23. Groove opening; 24. Connecting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] A film rewinding device, such as Figures 1-5 As shown, the machine includes a base 1. An unwinding roller 2 and a take-up roller 10 are rotatably mounted on one side of the base 1, and a guide roller assembly is fixedly connected to one side of the base 1. The guide roller assembly guides and levels the film and is located between the unwinding roller 2 and the take-up roller 10. A cylinder 12 with a film wound on its surface is sleeved on the side wall of the unwinding roller 2. The film passes through the guide roller assembly and its end is wound onto the take-up roller 10. Multiple sets of pressure blocks 11 are slidably mounted on the side wall of the unwinding roller 2. An extrusion assembly is slidably mounted inside the unwinding roller 2. The bottom of the multiple sets of pressure blocks 11 is in extrusion engagement with the extrusion assembly, and the multiple sets of pressure blocks 11 are arranged in a circumferential array. The ends of the multiple sets of pressure blocks 11 are in extrusion engagement with the inner wall of the cylinder 12.

[0025] By setting multiple sets of radially adjustable pressure blocks 11 inside the unwinding roller 2 and controlling the extrusion assembly, all pressure blocks 11 can be driven to extend or retract radially in sync. This allows the same unwinding roller 2 to firmly clamp and support cylinders 12 with different inner diameters, greatly improving the versatility of the equipment. The film has better flatness and tension, and the film rewinding effect is improved.

[0026] The guide roller assembly includes guide roller 3, guide roller 4, central roller 5, guide roller 6, and guide roller 7. Guide roller 3, guide roller 4, central roller 5, guide roller 6, and guide roller 7 are all located between unwinding roller 2 and take-up roller 10. Guide roller 3 and guide roller 4 are located between unwinding roller 2 and central roller 5. Guide roller 6 and guide roller 7 are located between central roller 5 and take-up roller 10.

[0027] A bracket 8 is fixedly connected to one side of the machine base 1. A coarse roller 9 is rotatably installed between one end of the bracket 8 and the machine base 1. The coarse roller 9 is located on one side of the guide roller 7 and is located below the take-up roller 10.

[0028] The cylindrical body 12 wrapped with a film is installed on the unwinding roller 2. The end of the film sequentially passes above the upper end of the first guiding roller 3, below the second guiding roller 4, below the central roller 5, above the third guiding roller 6, and above the fourth guiding roller 7. The fourth guiding roller 7 is close to the thick roller 9. The end of the film then passes below the thick roller 9 and is finally wound around the winding roller 10 to rewind the film, making the film flat.

[0029] Multiple groups of sliding grooves 13 are opened on the side wall of the unwinding roller 2. The cross-sectional shapes of the multiple groups of sliding grooves 13 are all set as "convex" shapes. One end of the pressing block 11 is fixedly connected with a protrusion 14, and the protrusion 14 slides in the sliding groove 13.

[0030] The bottom of the pressing block 11 slides in the sliding groove 13 through the protrusion 14, so that the pressing block 11 cannot be separated from the unwinding roller 2, and the pressing block 11 moves radially.

[0031] The extrusion assembly includes multiple groups of first connecting plates 16. The multiple groups of first connecting plates 16 respectively slide in the multiple groups of sliding grooves 13. Multiple groups of driving blocks 17 are fixedly connected to the side walls of the multiple groups of first connecting plates 16. Multiple groups of grooves 15 are opened at the bottoms of the multiple groups of pressing blocks 11. The multiple groups of driving blocks 17 are respectively in extrusion fit with the inner walls of the multiple groups of grooves 15.

[0032] The shapes of the driving block 17 and the groove 15 are both right-angled trapezoids. When the first connecting plate 16 slides in the sliding groove 13, the inclined walls of the multiple groups of driving blocks 17 squeeze the inclined inner walls of the multiple groups of grooves 15, thereby squeezing the pressing block 11 and making the pressing block 11 slide. Therefore, by adjusting the extrusion degree between the driving block 17 and the pressing block 11, the height of the pressing block 11 extending out of the sliding groove 13 can be adjusted, so that the multiple groups of pressing blocks 11 squeeze the cylindrical bodies 12 with different diameters, making the friction between the cylindrical bodies 12 and the unwinding roller 2 larger and not easy to loosen.

[0033] Multiple groups of slot openings 23 are opened at one end of the unwinding roller 2. One end of each of the multiple groups of first connecting plates 16 penetrates through the sliding groove 13 and is fixedly connected with a sliding plate 18. The multiple groups of sliding plates 18 respectively slide in the multiple groups of slot openings 23.

[0034] The sliding plate 18 slides in the slot opening 23 to push and pull the first connecting plate 16.

[0035] The multiple groups of sliding plates 18 are fixedly connected by a second connecting plate 19 to form a ring body. A connecting groove 24 is连通 opened between the multiple groups of slot openings 23. The second connecting plate 19 slides in the connecting groove 24. A driving plate 20 is fixedly connected to the middle of the ring body. The driving plate 20 slides in the unwinding roller 2. A cylinder 22 is fixedly connected in the unwinding roller 2. The output end of the cylinder 22 is fixedly connected with the driving plate 20.

[0036] The output end of cylinder 22 (model AT91-100-2223) pushes and pulls drive plate 20. Drive plate 20 is connected to multiple sets of slide plates 18. Therefore, drive plate 20 will drive multiple sets of slide plates 18 and connecting plate 29 to slide, so that slide plates 18 and connecting plate 29 slide in slot 23 and connecting slot 24 respectively, thereby pushing and pulling multiple sets of connecting plate 16, driving drive block 17 to squeeze pressure block 11.

[0037] The working principle of the film rewinding device provided by this utility model is as follows:

[0038] By mounting the cylinder 12 onto the unwinding roller 2, the cylinder 22 pushes and pulls the drive plate 20. The drive plate 20 drives multiple sets of sliding plates 18 and connecting plates 19 to slide, allowing the sliding plates 18 and connecting plates 19 to slide in the slots 23 and 24 respectively. This pushes and pulls multiple sets of connecting plates 16, causing the inclined walls of multiple sets of drive blocks 17 to press against the inclined inner walls of multiple sets of grooves 15, thereby pressing the pressure block 11. The pressure block 11 slides radially, extending or retracting, pressing cylinders 12 of different diameters. This results in greater friction between the cylinder 12 and the unwinding roller 2, making it less prone to loosening. The same unwinding roller 2 can firmly clamp and support cylinders 12 of various inner diameters, greatly improving the versatility of the equipment. The film has better flatness and tension, and the film rewinding effect is improved.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A film rewinding apparatus, comprising a base (1), characterized in that, On one side of the machine base (1), an unwinding roller (2) and a winding roller (10) are rotatably installed, and a guide roller assembly is fixedly connected to one side of the machine base (1). The guide roller assembly is located between the unwinding roller (2) and the winding roller (10). A cylinder body (12) with a film wound on its surface is sleeved on the side wall of the unwinding roller (2). The film passes through the guide roller assembly and its end is wound on the winding roller (10). A plurality of pressing blocks (11) are slidably installed on the side wall of the unwinding roller (2). An extrusion assembly is slidably installed inside the unwinding roller (2). The bottoms of the plurality of pressing blocks (11) are all in extrusion fit with the extrusion assembly, and the plurality of pressing blocks (11) are arranged in a circumferential array. The ends of the plurality of pressing blocks (11) are all in extrusion fit with the inner wall of the cylinder body (12).

2. A film rewinding device according to claim 1, characterized in that The guide roller assembly includes a first guide roller (3), a second guide roller (4), a central roller (5), a third guide roller (6) and a fourth guide roller (7). The first guide roller (3), the second guide roller (4), the central roller (5), the third guide roller (6) and the fourth guide roller (7) are all located between the unwinding roller (2) and the winding roller (10). The first guide roller (3) and the second guide roller (4) are located between the unwinding roller (2) and the central roller (5). The third guide roller (6) and the fourth guide roller (7) are located between the central roller (5) and the winding roller (10). A bracket (8) is fixedly connected to one side of the machine base (1). A thick roller (9) is rotatably installed between one end of the bracket (8) and the machine base (1). The thick roller (9) is located on one side of the fourth guide roller (7) and below the winding roller (10).

3. The film rewinding device according to claim 1, wherein A plurality of chutes (13) are opened on the side wall of the unwinding roller (2). The cross-sectional shapes of the plurality of chutes (13) are all set to be "convex" shaped. A protrusion (14) is fixedly connected to one end of the pressing block (11). The protrusion (14) slides in the chute (13).

4. A film rewinding device according to claim 3, wherein The extrusion assembly includes a plurality of first connecting plates (16). The plurality of first connecting plates (16) slide in the plurality of chutes (13) respectively. A plurality of driving blocks (17) are fixedly connected to the side walls of the plurality of first connecting plates (16). A plurality of grooves (15) are opened at the bottoms of the plurality of pressing blocks (11). The plurality of driving blocks (17) are respectively in extrusion fit with the inner walls of the plurality of grooves (15).

5. A film rewinding device according to claim 4, wherein A plurality of slot openings (23) are opened at one end of the unwinding roller (2). One end of each of the plurality of first connecting plates (16) penetrates through the chute (13) and is fixedly connected to a sliding plate (18). The plurality of sliding plates (18) slide in the plurality of slot openings (23) respectively.

6. A film rewinding device according to claim 5, wherein The plurality of sliding plates (18) are fixedly connected by a second connecting plate (19) to form a ring body. A connecting groove (24) is communicated and opened between the plurality of slot openings (23). The second connecting plate (19) slides in the connecting groove (24). A driving plate (20) is fixedly connected to the middle of the ring body. The driving plate (20) slides inside the unwinding roller (2). A cylinder (22) is fixedly connected inside the unwinding roller (2). The output end of the cylinder (22) is fixedly connected to the driving plate (20).

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