Automatic edge cutting device for PET (Polyethylene Terephthalate) film

Abstract

The utility model provides a PET film automatic trimming device, including conveyer belt, outer frame, hydraulic rod and cutting knife, the outer frame is fixedly installed on the top of conveyer belt, the hydraulic rod is fixedly installed on the top of outer frame, the cutting knife is fixedly installed on the output end of hydraulic rod, the inside of outer frame is provided with two compression block, the inside of outer frame is provided with one end of hydraulic rod, the other end of hydraulic rod is provided with the other end of hydraulic rod. And a pressing wheel is rotationally connected to the interior of the pressing block through a rotating shaft, and a transmission mechanism is arranged at the top of the outer frame and can control the pressing wheel to press the PET film. The utility model relates to the technical field of edge cutting of PET (Polyethylene Terephthalate) films. According to the automatic edge cutting device for the PET film, the transmission mechanism is arranged, so that when the PET film is conveyed by the conveying belt to be cut, the bottom of the pressing wheel is in contact with the surface of the PET film by rotating the twisting block to be matched with the transmission mechanism, and the pressing function can be achieved; therefore, the effect of preventing the position of the PET film from deviating in the cutting process is achieved.

Description

Technical Field

[0001] This utility model relates to the field of PET film edge cutting technology, specifically to an automatic PET film edge cutting device. Background Technology

[0002] PET film is a packaging film with comprehensive performance. It has good transparency and gloss; at the same time, it has excellent mechanical properties, and its strength and toughness are the best among all thermoplastics. During the production process, PET film has a relatively wide initial width. In the later processing, the edges of the film need to be trimmed to meet the usage standards.

[0003] The patent application CN220179394U discloses an automatic edge-cutting device for PET film, comprising an outer frame, a lead screw rotatably connected to the inner wall of the outer frame, a limit block fixedly connected to the center of the lead screw, hollow tubes threadedly connected to both sides of the lead screw, connecting blocks fixedly connected to the outer walls of the hollow tubes, and cutting blades fixedly connected to the bottom front end of each connecting block. Arc-shaped grooves are fixedly connected to the top ends of the lead screw on both sides of the outer frame. In this device, activating a hydraulic rod moves a connecting plate backward, which in turn moves a limit rod backward, causing the cutting blades on both sides to tilt upward. At this point, a servo motor is activated to rotate the lead screw, which in turn moves the hollow tubes, connecting blocks, and cutting blades simultaneously inward or outward, thus achieving adjustable cutting blade width, which can be adjusted during the cutting of PET film.

[0004] However, the above-mentioned device still has the following problems during implementation:

[0005] The existing technology and the above-mentioned solutions allow for adjustable cutting blade width, which can be adjusted during the cutting of PET film. However, considering that PET film lacks a clamping function during the cutting process, the position of PET film is prone to shift during the cutting process, thus affecting the cutting effect. Utility Model Content

[0006] The purpose of this invention is to provide an automatic edge-cutting device for PET film to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic edge-cutting device for PET film includes a conveyor belt, an outer frame, a hydraulic rod, and a cutting blade. The outer frame is fixedly installed on the top of the conveyor belt, the hydraulic rod is fixedly installed on the top of the outer frame, and the cutting blade is fixedly installed on the output end of the hydraulic rod. Two clamping blocks are provided inside the outer frame, and clamping wheels are rotatably connected to the inside of the clamping blocks via a rotating shaft. A transmission mechanism is provided on the top of the outer frame to control the clamping wheels to clamp the PET film.

[0009] An adjustment mechanism is fixedly mounted on the transmission mechanism and is capable of adjusting the pressing position of the pressure wheel.

[0010] Preferably, the transmission mechanism includes a threaded rod threaded to the top of the outer frame, a threaded hole for cooperating with the threaded rod at the top of the outer frame, a bearing seat at the bottom of the threaded rod, a connecting block rotatably connected to the bottom of the threaded rod through the bearing seat, a sleeve fitted onto the surface of the connecting block, a linkage block fixedly connected to the bottom of the sleeve, a sliding groove inside the linkage block, two sliding blocks slidably connected to the inner wall of the sliding groove, and the bottom of the sliding blocks fixedly connected to the top of the pressing block.

[0011] By setting up a transmission mechanism, when the PET film is being cut by conveying it on the conveyor belt, the rotating block, in conjunction with the transmission mechanism, makes the bottom of the pressure roller contact the surface of the PET film, thus achieving the function of pressing and preventing the PET film from shifting position during the cutting process.

[0012] Preferably, the adjustment mechanism includes a positioning plate fixedly connected to the top of the sliding block, a tension spring fixedly connected to the top of the positioning plate, a pulling block fixedly connected to the top of the tension spring, two positioning rods fixedly connected to the bottom of the pulling block, and a positioning hole for cooperating with the positioning rods opened on the top of the linkage block.

[0013] By setting an adjustment mechanism, the pulling block can be pushed upward to move the positioning rod away from the inside of the positioning hole. Then, the clamping block and clamping wheel can be pushed to adjust along the trajectory of the sliding block and sliding groove. After reaching the appropriate position, the pulling block is released, and the tension generated by the tension spring will move the pulling block and positioning rod downward, so that the positioning rod enters the inside of the corresponding positioning hole, completing the adjustment of the position of the clamping wheel, thereby improving the clamping effect.

[0014] Preferably, a spring is fixedly connected to the inner wall of the sleeve, and the top of the spring is fixedly connected to the bottom of the connecting block.

[0015] By incorporating springs, the PET film can be cushioned while the pressure rollers press it down, preventing damage to the PET film surface caused by excessive contact between the pressure rollers.

[0016] Preferably, a screwing block is fixedly connected to the top of the threaded rod, and four anti-slip grooves are formed on the outer surface of the screwing block.

[0017] By setting a turning block and an anti-slip groove, a leverage point can be provided for the user to turn the threaded rod, making it easier for the user to turn the threaded rod. At the same time, the anti-slip groove can prevent the user's hand from slipping during the rotation.

[0018] Preferably, guide blocks are fixedly connected to both sides of the linkage block, and guide grooves that cooperate with the guide blocks are provided on the inner wall of the outer frame.

[0019] By setting guide blocks and guide slots, a movement trajectory can be provided for structures such as linkage blocks, while restricting the linkage blocks and other structures to move horizontally and vertically only along the trajectory of the guide blocks and guide slots.

[0020] Preferably, the number of positioning holes is several, and they are evenly distributed on the top of the linkage block.

[0021] By setting several positioning holes, the positions of the clamping block and clamping wheel can be adjusted by inserting the positioning rod into the corresponding positioning hole after the position of the clamping block and clamping wheel has been adjusted, thus improving the efficiency of adjustment.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. By setting up a transmission mechanism, this utility model can achieve the function of pressing by rotating the twisting block in cooperation with the transmission mechanism when the PET film is being cut by conveying it on the conveyor belt, so that the bottom of the pressing wheel contacts the surface of the PET film, thereby preventing the PET film from shifting position during the cutting process.

[0024] 2. This utility model, by setting an adjustment mechanism, can push the pulling block upward to drive the positioning rod away from the inside of the positioning hole. Then, the pressing block and the pressing wheel can be pushed to adjust along the trajectory of the sliding block and the sliding groove. After reaching the appropriate position, the pulling block is released, and the tension generated by the tension spring will drive the pulling block and the positioning rod downward to make the positioning rod enter the inside of the corresponding positioning hole, thus completing the adjustment of the position of the pressing wheel and improving the pressing effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0026] Figure 2 This is a perspective view of the main structure of this utility model in cross-section;

[0027] Figure 3 This utility model Figure 2A magnified view of a section at point A in the middle;

[0028] Figure 4 This is a perspective view of a partial structure of the transmission mechanism of this utility model;

[0029] Figure 5 This is an exploded perspective view of the transmission mechanism of this utility model.

[0030] Figure 6 This is a perspective view of a portion of the adjustment mechanism of this utility model.

[0031] In the diagram: 1. Conveyor belt; 2. Outer frame; 3. Hydraulic rod; 4. Cutting blade; 5. Clamping block; 6. Clamping wheel; 7. Threaded rod; 8. Bearing seat; 9. Connecting block; 10. Sleeve; 11. Linkage block; 12. Sliding groove; 13. Sliding block; 14. Positioning plate; 15. Tension spring; 16. Pulling block; 17. Positioning rod; 18. Positioning hole; 19. Spring; 20. Tightening block; 21. Anti-slip groove; 22. Guide block; 23. Guide groove; 24. Threaded hole. 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] Please see Figures 1-6 This utility model provides a technical solution:

[0034] Example 1: An automatic edge-cutting device for PET film includes a conveyor belt 1, an outer frame 2, a hydraulic rod 3, and a cutting blade 4. The outer frame 2 is fixedly installed on the top of the conveyor belt 1, the hydraulic rod 3 is fixedly installed on the top of the outer frame 2, and the cutting blade 4 is fixedly installed on the output end of the hydraulic rod 3. Two clamping blocks 5 are provided inside the outer frame 2. The clamping blocks 5 are rotatably connected to clamping wheels 6 through a rotating shaft. A transmission mechanism is provided on the top of the outer frame 2, which can control the clamping wheels 6 to clamp the PET film.

[0035] The adjustment mechanism is fixedly mounted on the transmission mechanism and can adjust the pressing position of the pressure wheel 6.

[0036] One embodiment of this example is as follows: The transmission mechanism includes a threaded rod 7 threadedly connected to the top of the outer frame 2. The top of the outer frame 2 has a threaded hole 24 that mates with the threaded rod 7. A bearing seat 8 is provided at the bottom of the threaded rod 7. A connecting block 9 is rotatably connected to the bottom of the threaded rod 7 through the bearing seat 8. A sleeve 10 is fitted onto the surface of the connecting block 9. A linkage block 11 is fixedly connected to the bottom of the sleeve 10. A sliding groove 12 is provided inside the linkage block 11. Two sliding blocks 13 are slidably connected to the inner wall of the sliding groove 12. The bottom of the sliding block 13 is fixedly connected to the top of the pressing block 5.

[0037] This embodiment takes into account the lack of a clamping function in the PET film during the cutting process, which makes the position of the PET film prone to displacement during the cutting process, thus affecting the cutting effect. Therefore, by setting up a transmission mechanism, when the PET film is conveyed by the conveyor belt 1 for cutting, the rotating twisting block 20 drives the threaded rod 7 to rotate in the threaded hole 24. As the threaded rod 7 gradually descends in the threaded hole 24, it will drive the connecting block 9, spring 19 and sleeve 10 to move downward. The sleeve 10 will drive the linkage block 11, sliding block 13, clamping block 5 and clamping wheel 6 to move downward along the trajectory of guide block 22 and guide groove 23. When the bottom of the clamping wheel 6 contacts the surface of the PET film, the clamping function can be achieved, thereby preventing the position of the PET film from shifting during the cutting process.

[0038] This solves the problem that the PET film's position is prone to shifting during the cutting process due to the lack of a clamping function, which affects the cutting effect.

[0039] It should be noted that the pressure roller 6 is a rotating connection and will not affect the normal transmission of the PET film on the conveyor belt 1.

[0040] Preferably, a spring 19 is fixedly connected to the inner wall of the sleeve 10, and the top of the spring 19 is fixedly connected to the bottom of the connecting block 9.

[0041] In this embodiment, by setting a spring 19, the spring 19 can play a certain buffering role while the pressure roller 6 is pressing the PET film, so as to avoid the pressure roller 6 affecting contact and causing damage to the surface of the PET film.

[0042] Preferably, a screwing block 20 is fixedly connected to the top of the threaded rod 7, and four anti-slip grooves 21 are provided on the outer surface of the screwing block 20.

[0043] This embodiment provides a leverage point for the user to rotate the threaded rod 7 by setting the turning block 20 and the anti-slip groove 21, so that the user can rotate the threaded rod 7. At the same time, the anti-slip groove 21 can prevent the user's hand from slipping during rotation.

[0044] Preferably, guide blocks 22 are fixedly connected to both sides of the linkage block 11, and guide grooves 23 that cooperate with the guide blocks 22 are provided on the inner wall of the outer frame 2.

[0045] This embodiment provides a movement trajectory for structures such as the linkage block 11 by setting guide block 22 and guide groove 23, while restricting the linkage block 11 and other structures to move horizontally up and down only along the trajectory of guide block 22 and guide groove 23.

[0046] Example 2: Based on Example 1, in this example, the transmission mechanism can press the PET film by controlling the pressing wheel 6, thereby preventing the PET film from shifting position during the cutting process. However, considering the different widths of the PET film, if the pressing wheel 6 cannot press in the appropriate position, it will also affect the pressing effect. In this example, the adjustment mechanism includes a positioning plate 14 fixedly connected to the top of the sliding block 13. A tension spring 15 is fixedly connected to the top of the positioning plate 14. A pulling block 16 is fixedly connected to the top of the tension spring 15. Two positioning rods 17 are fixedly connected to the bottom of the pulling block 16. The top of the linkage block 11 is provided with a positioning hole 18 that cooperates with the positioning rods 17.

[0047] This embodiment takes into account the different widths of PET films. If the pressing wheel 6 cannot be pressed in the appropriate position, it will also affect the pressing effect. Therefore, by setting an adjustment mechanism, the pulling block 16 can be pushed upward to drive the positioning rod 17 away from the inside of the positioning hole 18. Then, the pressing block 5 and the pressing wheel 6 can be pushed to adjust along the trajectory of the sliding block 13 and the sliding groove 12. After reaching the appropriate position, the pulling block 16 is released. The tension generated by the tension spring 15 will drive the pulling block 16 and the positioning rod 17 to move downward, so that the positioning rod 17 enters the inside of the corresponding positioning hole 18, completing the adjustment of the position of the pressing wheel 6, thereby improving the pressing effect.

[0048] This solves the problem that if the pressure roller 6 cannot be pressed into the appropriate position due to the different widths of PET films, the pressing effect will also be affected.

[0049] Preferably, the number of positioning holes 18 is several, and they are evenly distributed on the top of the linkage block 11.

[0050] This embodiment, by setting a number of positioning holes 18, can complete the adjustment of the positions of the pressing block 5 and the pressing wheel 6 after the positions of the pressing block 5 and the pressing wheel 6 are adjusted, by having the positioning rod 17 enter the corresponding positioning hole 18, thus improving the adjustment efficiency.

[0051] Working principle: When the PET film is conveyed by the conveyor belt 1 for cutting, the user can rotate the screw block 20 to drive the threaded rod 7 to rotate in the threaded hole 24. As the threaded rod 7 gradually descends in the threaded hole 24, it will drive the connecting block 9, spring 19 and sleeve 10 to move downward. The sleeve 10 will drive the linkage block 11, sliding block 13, pressing block 5 and pressing wheel 6 to move downward along the trajectory of guide block 22 and guide groove 23. When the bottom of the pressing wheel 6 contacts the surface of the PET film, the pressing function is achieved, thereby preventing the PET film from shifting position during the cutting process.

[0052] Simultaneously, by pushing the pull block 16 upward, the positioning rod 17 is driven away from the interior of the positioning hole 18. Then, the clamping block 5 and the clamping wheel 6 can be pushed to adjust along the trajectory of the sliding block 13 and the sliding groove 12. After reaching the appropriate position, the pull block 16 is released, and the tension generated by the tension spring 15 will drive the pull block 16 and the positioning rod 17 downward, so that the positioning rod 17 enters the interior of the corresponding positioning hole 18, completing the adjustment of the position of the clamping wheel 6, thereby improving the clamping effect.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic edge-cutting device for PET film, comprising a conveyor belt (1), an outer frame (2), a hydraulic rod (3), and a cutting blade (4), wherein the outer frame (2) is fixedly installed on the top of the conveyor belt (1), the hydraulic rod (3) is fixedly installed on the top of the outer frame (2), and the cutting blade (4) is fixedly installed at the output end of the hydraulic rod (3), characterized in that: The outer frame (2) is provided with two pressing blocks (5) inside. The pressing blocks (5) are rotatably connected to pressing wheels (6) through a rotating shaft. The top of the outer frame (2) is provided with a transmission mechanism that can control the pressing wheels (6) to press the PET film. An adjustment mechanism is fixedly mounted on the transmission mechanism and can adjust the pressing position of the pressing wheel (6).

2. The automatic edge-cutting device for PET film according to claim 1, characterized in that: The transmission mechanism includes a threaded rod (7) threaded to the top of the outer frame (2). The top of the outer frame (2) is provided with a threaded hole (24) that works with the threaded rod (7). The bottom of the threaded rod (7) is provided with a bearing seat (8). The bottom of the threaded rod (7) is rotatably connected to a connecting block (9) through the bearing seat (8). A sleeve (10) is fitted onto the surface of the connecting block (9). A linkage block (11) is fixedly connected to the bottom of the sleeve (10). A sliding groove (12) is provided inside the linkage block (11). Two sliding blocks (13) are slidably connected to the inner wall of the sliding groove (12). The bottom of the sliding block (13) is fixedly connected to the top of the pressing block (5).

3. The automatic edge-cutting device for PET film according to claim 2, characterized in that: The adjustment mechanism includes a positioning plate (14) fixedly connected to the top of the sliding block (13), a tension spring (15) fixedly connected to the top of the positioning plate (14), a pulling block (16) fixedly connected to the top of the tension spring (15), two positioning rods (17) fixedly connected to the bottom of the pulling block (16), and a positioning hole (18) for cooperating with the positioning rods (17) is provided on the top of the linkage block (11).

4. The automatic edge-cutting device for PET film according to claim 2, characterized in that: A spring (19) is fixedly connected to the inner wall of the sleeve (10), and the top of the spring (19) is fixedly connected to the bottom of the connecting block (9).

5. The automatic edge-cutting device for PET film according to claim 2, characterized in that: The top of the threaded rod (7) is fixedly connected to a screwing block (20), and the outer surface of the screwing block (20) is provided with four anti-slip grooves (21).

6. The automatic edge-cutting device for PET film according to claim 2, characterized in that: Guide blocks (22) are fixedly connected to both sides of the linkage block (11), and guide grooves (23) that cooperate with the guide blocks (22) are provided on the inner wall of the outer frame (2).

7. The automatic edge-cutting device for PET film according to claim 3, characterized in that: The number of positioning holes (18) is several, and they are evenly distributed on the top of the linkage block (11).

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