PET sheet slitting device

Abstract

The utility model relates to the field of PET sheet cutting, disclose a PET sheet cutting device, including support, the support lateral wall is provided with winding structure, the support top fixedly connected with rotating roller, the support lateral wall is provided with support frame, the support frame top fixedly connected with cutting roller, the support frame lateral wall is provided with another support, the support top fixedly connected with platform, the support frame other side is provided with adjusting assembly, the adjusting assembly includes hollow board, the hollow board lateral wall sets up in support frame lateral wall, the hollow board lateral wall fixedly connected with air cylinder, the air cylinder output fixedly connected with inclined surface block, in the utility model, through air cylinder and push the inclined surface block removal, utilize the inclined surface structure and lift the rotating wheel, drive first hollow block and sliding column and slide in the thimble, further drive support frame removal, solve because material thickness uneven or partial tightness difference leads to cutting problem, promoted the practicality and adaptability of cutting device.

Description

Technical Field

[0001] This utility model relates to the field of PET sheet slitting, and more particularly to a PET sheet slitting device. Background Technology

[0002] With the rapid development of industries such as packaging, electronics, and printing, PET sheets, due to their excellent mechanical properties, chemical resistance, and transparency, are widely used in packaging, protective film production, and precision component processing for various products. In the production and processing of PET sheets, slitting is a crucial step, requiring large rolls of PET raw materials to be cut into smaller rolls of different widths according to actual needs. This places high demands on the precision, stability, and adaptability of PET sheet slitting equipment.

[0003] Existing PET sheet slitting devices typically employ a fixed tension roller structure combined with a mechanical transmission system to achieve the slitting operation. The underlying principle is that a motor drives the drive roller to rotate, utilizing the friction between the drive and driven rollers to propel the PET sheet forward. Simultaneously, slitting cutters are positioned along the conveying path, cutting the sheet through high-speed rotation or reciprocating motion. Tension control often relies on pre-set mechanical pressure or weight loading to maintain sheet tension. For example, springs or counterweights at both ends of the tension roller are used to keep the sheet taut during conveying, reducing swaying during slitting.

[0004] However, existing technologies that use a fixed tension method are ill-suited to address issues such as uneven thickness and localized tension differences in PET sheets during production. When these problems exist, the fixed tension leads to uneven stress on the sheet during slitting, resulting in uneven slitting edges, or even sheet stretching, deformation, or breakage, severely impacting slitting quality and product yield. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a PET sheet slitting device, which aims to improve the situation where PET sheets are subjected to fixed tension during slitting, and the material itself has uneven thickness and local tension differences.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a PET sheet slitting device, including a bracket, a winding structure provided on the side wall of the bracket, a rotating roller fixedly connected to the top of the bracket, a support frame provided on the side wall of the bracket, a slitting roller fixedly connected to the top of the support frame, another bracket provided on the side wall of the support frame, a platform fixedly connected to the top of the bracket, and an adjustment component provided on the other side of the support frame;

[0007] The adjustment assembly includes a hollow plate, the sidewall of which is disposed on the sidewall of the support frame. A cylinder is fixedly connected to the sidewall of the hollow plate, and an inclined block is fixedly connected to the output end of the cylinder. A rotating wheel is rotatably connected to the sidewall of the inclined block. A collar is fixedly connected inside the hollow plate, and a sliding column is slidably connected inside the collar. A first hollow block is fixedly connected to one end of the sliding column. A spring-loaded assembly is disposed on the top of the first hollow block. The inner wall of the first hollow block is rotatably connected to the sidewall of the rotating wheel. A limit assembly is disposed on the inner wall of the hollow plate.

[0008] As a further description of the above technical solution:

[0009] The limiting component includes a second slide rail, the inner wall of which is fixedly connected to the inside of the hollow plate, and the side wall of which is slidably connected to the inside of the inclined block.

[0010] As a further description of the above technical solution:

[0011] The rebound assembly includes a spring, one end of which is fixedly connected to the bottom of the collar, and the other end of which is fixedly connected to the top of the first hollow block.

[0012] As a further description of the above technical solution:

[0013] A fixing frame is fixedly connected inside the bracket, and a connecting block is fixedly connected to the top of the fixing frame.

[0014] As a further description of the above technical solution:

[0015] A hydraulic cylinder is rotatably connected to the side wall of the connecting block, and a connecting hollow block is fixedly connected to the output end of the hydraulic cylinder.

[0016] As a further description of the above technical solution:

[0017] A sliding plate is rotatably connected to the inner wall of the connecting hollow block. A moving component is provided at the bottom of the sliding plate. A clamping block is fixedly connected to the top of the sliding plate. A linkage rod is rotatably connected to the inner wall of the sliding plate.

[0018] As a further description of the above technical solution:

[0019] The other end of the linkage rod is rotatably connected to a rotating plate, and a rotating shaft is rotatably connected inside the rotating plate. The bottom of the rotating shaft is fixedly connected to the top of the fixed frame.

[0020] As a further description of the above technical solution:

[0021] The moving component includes a slider, the top of which is fixedly connected to the bottom of a sliding plate, and a first slide rail is slidably connected inside the slider, the bottom of which is fixedly connected to the top of a fixed frame.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the inclined block is driven by a cylinder to move, and then the inclined surface of the inclined block lifts the rotating wheel. Subsequently, the rotating wheel drives the first hollow block and the sliding column to slide inside the collar. Then, the sliding column is forced to drive the support frame to move, thereby achieving the effect of adjusting the tension. This solves the problem that PET sheets are subjected to fixed tension during slitting, and if the material itself has uneven thickness or local tightness differences, it improves the practicality of the PET sheet slitting device.

[0024] 2. In this utility model, the hollow block is driven to move by a hydraulic cylinder, which in turn drives the sliding plate and the bottom slider to slide along the first slide rail. When the sliding plate moves, it pushes the rotating plate to rotate around the rotating axis through the linkage rod, and at the same time, the sliding plate on the other side is synchronously gathered, thereby achieving precise positioning of the PET sheet. This solves the problem of lateral offset caused by roller parallelism error, uneven material tension or winding eccentricity during the slitting process, ensuring that the width of the roll after slitting is consistent, and significantly improving the stability and processing accuracy of the slitting device. Attached Figure Description

[0025] Figure 1 This is a perspective view of a PET sheet slitting device proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the support sidewall structure of a PET sheet slitting device proposed in this utility model;

[0027] Figure 3 This is a schematic cross-sectional view of the fixing frame structure of a PET sheet cutting device proposed in this utility model;

[0028] Figure 4 This is a schematic cross-sectional view of the fixing frame of a PET sheet cutting device proposed in this utility model;

[0029] Figure 5 for Figure 5 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Rewinding structure; 2. Support frame; 3. Rotating roller; 4. Support frame; 5. Platform; 6. Sliding roller; 7. Hydraulic cylinder; 8. Connecting hollow block; 9. Sliding plate; 10. Linkage rod; 11. Rotating plate; 12. Rotating shaft; 13. Fixed frame; 14. Slider; 15. First slide rail; 16. Hollow plate; 17. Cylinder; 18. Inclined block; 19. Second slide rail; 20. Collar; 21. First hollow block; 22. Rotating wheel; 23. Spring; 24. Sliding column; 25. Clamping block; 26. Connecting block. Detailed Implementation

[0032] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-3 This utility model provides an embodiment of a PET sheet slitting device, including a support 2. The support 2 supports the overall structure of the device and provides an installation foundation for components such as the winding structure 1, rotating roller 3, and support frame 4, ensuring the stability of the device during operation. The winding structure 1 is provided on the side wall of the support 2. The winding structure 1 is used to wind and store the slit PET sheets, and achieves synchronous winding in coordination with the conveying rhythm of the rotating roller 3, ensuring that the sheets are orderly arranged after slitting and avoiding stacking chaos. The rotating roller 3 is fixedly connected to the top of the support 2. The rotating roller 3 is used to convey the PET sheets, and drives the sheets to move smoothly through its own rotation, providing support for slitting, limiting, and other processes. The sequence provides continuous material conveying to ensure the continuity of the slitting process. The support frame 4 is provided on the side wall of the support frame 2. The support frame 4 is used to install and fix the slitting roller 6 and the adjustment component. The height of the adjustment component is changed by driving it, thereby adjusting the contact state between the slitting roller 6 and the sheet to achieve tension adjustment. The slitting roller 6 is fixedly connected to the top of the support frame 4. The slitting roller 6 is used to slitting the PET sheet. The cutting action is achieved by the contact pressure with the sheet. Its height is adjusted by the support frame 4 to adapt to different tension requirements. Another support frame 2 is provided on the side wall of the support frame 4. The platform 5 is fixedly connected to the top of the support frame 2. The adjustment component is provided on the other side of the support frame 4.

[0034] The adjustment assembly includes a hollow plate 16, with its sidewalls set on the sidewalls of the support frame 4. A cylinder 17 is fixedly connected to the sidewalls of the hollow plate 16. The cylinder 17, in conjunction with the inclined block 18 and the rotating wheel 22, transmits thrust. The cylinder 17 drives the inclined block 18 to slide horizontally, converting the horizontal force into an upward thrust of the rotating wheel 22, thereby driving the first hollow block 21 and the sliding column 24 to move, providing power for tension adjustment. The output end of the cylinder 17 is fixedly connected to the inclined block 18, and the rotating wheel 22 is rotatably connected to the sidewall of the inclined block 18. A collar 20 is fixedly connected inside the hollow plate 16, and a sliding column 24 is slidably connected inside the collar 20. The sliding column 24, in conjunction with the collar 20, guides the sliding motion. The sliding column 24 moves vertically along the inner wall of the collar 20, ensuring accurate and stable height adjustment of the support frame 4, avoiding deviation that could affect the cutting pressure, and achieving real-time compensation of tension. The effect of force fluctuation is achieved by fixing one end of the sliding column 24 to the first hollow block 21, and setting the top of the first hollow block 21 with a rebound component. The inner wall of the first hollow block 21 is rotatably connected to the side wall of the rotating wheel 22. The inner wall of the hollow plate 16 is provided with a limit component, which includes a second slide rail 19. The inner wall of the second slide rail 19 is fixedly connected to the inside of the hollow plate 16, and the side wall of the second slide rail 19 is slidably connected to the inside of the inclined block 18. The rebound component includes a spring 23. The spring 23 cooperates with the first hollow block 21 to perform a reset movement. When the sliding column 24 rises, the spring 23 is compressed and stores energy. After the sheet state is restored, the potential energy is released to push the first hollow block 21 to reset, causing the rotating wheel 22 to re-fit with the inclined block 18, thereby achieving the effect of dynamic tension balance adjustment. One end of the spring 23 is fixedly connected to the bottom of the collar 20, and the other end of the spring 23 is fixedly connected to the top of the first hollow block 21.

[0035] Reference Figure 4 and Figure 5 The bracket 2 has a fixed frame 13 inside, and a connecting block 26 is fixedly connected to the top of the fixed frame 13. A hydraulic cylinder 7 is rotatably connected to the side wall of the connecting block 26. The hydraulic cylinder 7 works with the linkage rod 10 to perform lever movement. The rotation of the rotating plate 11 drives the sliding plates 9 on both sides to move synchronously, realizing the symmetrical adjustment of the clamping block 25 and achieving the effect of accurately correcting the lateral offset of the sheet. A connecting hollow block 8 is fixedly connected to the output end of the hydraulic cylinder 7. A sliding plate 9 is rotatably connected to the inner wall of the connecting hollow block 8. A moving component is set at the bottom of the sliding plate 9, and a clamping block 25 is fixedly connected to the top of the sliding plate 9. A linkage rod 10 is rotatably connected to the inner wall of the movable plate 9. The other end of the linkage rod 10 is rotatably connected to a rotating plate 11. A rotating shaft 12 is rotatably connected inside the rotating plate 11. The bottom of the rotating shaft 12 is fixedly connected to the top of the fixed frame 13. The moving component includes a slider 14. The slider 14 and the first slide rail 15 form a linear guide mechanism to ensure the stability and positional accuracy of the sliding plate 9 when it moves. This is common knowledge and will not be elaborated here. The top of the slider 14 is fixedly connected to the bottom of the sliding plate 9. The first slide rail 15 is slidably connected inside the slider 14. The bottom of the first slide rail 15 is fixedly connected to the top of the fixed frame 13.

[0036] Working principle: During tension adjustment, when the PET sheet exhibits uneven thickness or localized tension differences, cylinder 17 drives inclined block 18 to slide horizontally along the second slide rail 19. The inclined surface of inclined block 18 contacts rotating wheel 22, generating an upward thrust. Under this force, rotating wheel 22 drives first hollow block 21 upward, causing sliding column 24 to slide along the inner wall of collar 20, while simultaneously compressing top spring 23 to store elastic potential energy. The displacement of sliding column 24 is directly transmitted to support frame 4. By adjusting the height of support frame 4, the contact pressure between slitting roller 6 and sheet is changed, compensating for tension fluctuations in real time and ensuring the sheet maintains a stable taut state during slitting. When the sheet returns to a uniform state, spring 23 releases its potential energy, pushing first hollow block 21 back to its original position, causing rotating wheel 22 to re-fit with inclined block 18, achieving dynamic tension balance adjustment.

[0037] During the sheet material positioning process, the hydraulic cylinder 7 pushes the sliding plate 9 via the hollow block 8, causing the slider 14 at the bottom of the sliding plate 9 to move horizontally along the first slide rail 15. As the sliding plate 9 moves, it drives the linkage rod 10 to rotate the rotating plate 11 around the rotating shaft 12. The rotating plate 11, through the linkage rod 10 on the other side, synchronously pulls the symmetrical sliding plates 9 to move in opposite directions, ensuring that the clamping blocks 25 on both sides precisely fit the edge of the sheet material. This linkage structure utilizes the lever principle to achieve synchronous adjustment of the clamping blocks 25 on both sides, effectively correcting the lateral offset of the sheet material during conveying. Combined with the smooth conveying of the rotating roller 3 and the synchronous winding of the winding structure 1, it ultimately ensures that the edges of the slit sheet material are neat and the width is consistent, significantly improving slitting accuracy and product qualification rate.

Claims

1. A PET sheet slitting device, comprising a support (2), characterized in that: The support (2) has a winding structure (1) on its side wall, a rotating roller (3) is fixedly connected to the top of the support (2), a support frame (4) is provided on the side wall of the support (2), a slitting roller (6) is fixedly connected to the top of the support frame (4), another support (2) is provided on the side wall of the support frame (4), a platform (5) is fixedly connected to the top of the support (2), and an adjustment component is provided on the other side of the support frame (4). The adjustment assembly includes a hollow plate (16), the side wall of which is disposed on the side wall of the support frame (4), a cylinder (17) is fixedly connected to the side wall of the hollow plate (16), an inclined block (18) is fixedly connected to the output end of the cylinder (17), a rotating wheel (22) is rotatably connected to the side wall of the inclined block (18), a collar (20) is fixedly connected inside the hollow plate (16), a sliding column (24) is slidably connected inside the collar (20), a first hollow block (21) is fixedly connected to one end of the sliding column (24), a spring-loaded assembly is provided on the top of the first hollow block (21), the inner wall of the first hollow block (21) is rotatably connected to the side wall of the rotating wheel (22), and a limit assembly is provided on the inner wall of the hollow plate (16).

2. The PET sheet slitting device according to claim 1, characterized in that: The limiting component includes a second slide rail (19), the inner wall of which is fixedly connected to the inside of the hollow plate (16), and the side wall of which is slidably connected to the inside of the inclined block (18).

3. The PET sheet slitting device according to claim 1, characterized in that: The rebound assembly includes a spring (23), one end of which is fixedly connected to the bottom of the collar (20), and the other end of which is fixedly connected to the top of the first hollow block (21).

4. A PET sheet slitting device according to claim 1, characterized in that: The bracket (2) is fixedly connected to a fixed frame (13), and a connecting block (26) is fixedly connected to the top of the fixed frame (13).

5. A PET sheet slitting device according to claim 4, characterized in that: The side wall of the connecting block (26) is rotatably connected to a hydraulic cylinder (7), and the output end of the hydraulic cylinder (7) is fixedly connected to a connecting hollow block (8).

6. A PET sheet slitting device according to claim 5, characterized in that: The inner wall of the connecting hollow block (8) is rotatably connected to a sliding plate (9), the bottom of the sliding plate (9) is provided with a moving component, the top of the sliding plate (9) is fixedly connected to a clamping block (25), and the inner wall of the sliding plate (9) is rotatably connected to a linkage rod (10).

7. A PET sheet slitting device according to claim 6, characterized in that: The other end of the linkage rod (10) is rotatably connected to a rotating plate (11), and a rotating shaft (12) is rotatably connected inside the rotating plate (11). The bottom of the rotating shaft (12) is fixedly connected to the top of the fixed frame (13).

8. A PET sheet slitting device according to claim 7, characterized in that: The moving component includes a slider (14), the top of which is fixedly connected to the bottom of the sliding plate (9), and a first slide rail (15) is slidably connected inside the slider (14), the bottom of which is fixedly connected to the top of the fixed frame (13).

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