A PET film biaxial stretching device

Abstract

This utility model discloses a biaxial stretching device for PET film, including a stretching frame and a support frame. The support frame is symmetrically mounted on the top of the stretching frame, and first transverse moving frames are symmetrically mounted on the top of the stretching frame between the two sides of the support frame. A moving plate is slidably mounted on the top of each of the first transverse moving frames, and a clamping frame is mounted on the top of each of the moving plates. Second transverse moving frames are mounted on the bottom of the support frame and on the top of the stretching frame below the support frame. A rotating frame is movably mounted on the top of each of the second transverse moving frames, and a connecting plate is slidably mounted on the top of each rotating frame. This utility model not only enables convenient clamping and transverse stretching of PET film by the biaxial stretching device, but also facilitates convenient longitudinal smoothing and wrinkle removal of the PET film by the biaxial stretching device, and allows for multi-position adjustment and adaptation of the biaxial stretching device to wrinkled areas of the PET film. Furthermore, it improves the flatness of the PET film and enhances the quality and efficiency of the biaxial stretching device in stretching the PET film.

Description

Technical Field

[0001] This utility model relates to the field of stretching device technology, specifically a biaxial stretching device for PET film. Background Technology

[0002] The PET film biaxial stretching apparatus is a device used to prepare polyester films such as PET films. This device can perform stretching processing on the film, so that it can achieve stretching effect in both the longitudinal and transverse directions, thereby obtaining biaxially stretched films with excellent performance. PET films are widely used in the packaging industry, and stretching processing is required in the production and processing of PET films.

[0003] For example, the PET film biaxial stretching device disclosed in the authorization announcement number CN221985830U includes a worktable, fixed rollers, gear 1 and motor 1, etc.; two fixed rollers are rotatably connected to the right side of the worktable; each fixed roller is fixedly connected to a gear 1, and the two gear 1s are meshed; the lower fixed roller is fixedly connected to a motor.

[0004] Although it achieves the smoothing of wrinkles in PET film by moving the scraper and scraper ring, and works with the rear scraping unit to smooth wrinkles on the front and back of PET film; and the wrinkles in the middle of PET film are larger than those on the sides, the scraper is arc-shaped, which adapts to the shrinkage shape of PET film when scraping the wrinkles, thus improving the scraping effect on PET film wrinkles.

[0005] However, this does not solve the problem that existing stretching devices of this type are generally not conducive to convenient clamping and lateral stretching of PET film during use, are not convenient for biaxial stretching devices to conveniently scrape and remove wrinkles from PET film longitudinally, and are not convenient for biaxial stretching devices to adjust and adapt to multiple positions of PET film wrinkle areas, thus affecting the flatness of PET film and the quality and efficiency of biaxial stretching devices in stretching PET film. Utility Model Content

[0006] The purpose of this utility model is to provide a PET film biaxial stretching device to solve the problems mentioned in the background art, such as the inconvenience of the stretching device in conveniently clamping and stretching the PET film laterally, the inconvenience of the biaxial stretching device in conveniently scraping and removing wrinkles from the PET film longitudinally, and the inconvenience of the biaxial stretching device in adapting to multiple positions of the wrinkled area of ​​the PET film, which affect the flatness of the PET film and the quality and efficiency of the biaxial stretching device in stretching the PET film.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a PET film biaxial stretching device, comprising a stretching frame and a support frame. The support frame is symmetrically mounted on the top of the stretching frame. First transverse moving frames are symmetrically mounted on the top of the stretching frame between the two sides of the support frame. A moving plate is slidably mounted on the top of each of the first transverse moving frames. A pressing frame is mounted on the top of each of the moving plates. Second transverse moving frames are mounted on the bottom of the support frame and on the top of the stretching frame below the support frame. A rotating frame is movably mounted on the top of each of the second transverse moving frames. A connecting plate is slidably mounted on the top of each rotating frame. A T-shaped frame is mounted on the outer wall of each connecting plate. Each of the T-shaped frames is equipped with a clamping cylinder at its top, a clamping push rod at the output end of each clamping cylinder, and a clamping frame at the top of each clamping push rod. Multiple sets of equally spaced scrapers are movably installed inside each clamping frame, extending to the outside of the clamping frame. A servo motor is installed on the outer wall of each of the first transverse moving frames. A first threaded rod is installed at the output end of each servo motor, extending into the interior of the first transverse moving frame. A first threaded sleeve is fitted onto the surface of the first threaded rod, and the first threaded sleeve is slidably connected to the first transverse moving frame and connected to the moving plate. Lifting cylinders are symmetrically installed at the top of each clamping frame.

[0008] Preferably, each of the lifting cylinders is equipped with a lifting push rod at its output end, and the lifting push rod extends into the interior of the clamping frame. The end of the lifting push rod away from the lifting cylinder is equipped with a bearing seat, and the bearing seat is slidably connected to the clamping frame.

[0009] Preferably, each of the pressing frames above the movable plate is equipped with a fixed roller, and each of the pressing frames above the fixed roller is equipped with a movable roller, and the movable roller is connected to the bearing seat.

[0010] Preferably, a fixing plate is installed at the bottom end of the movable roller on one side of the fixed roller, and a fixing groove is provided at the top end of the fixed roller on one side of the movable roller.

[0011] Preferably, each of the second transverse moving frames is equipped with a stepper motor on its outer wall, and each of the stepper motors has a second threaded rod installed at its output end. The second threaded rod extends into the interior of the second transverse moving frame, and a second threaded seat is fitted onto the surface of the second threaded rod. The second threaded seat is slidably connected to the second transverse moving frame.

[0012] Preferably, a connecting block is installed at the top of each of the second threaded seats, and a rotating shaft is movably installed at the top of each connecting block. The rotating shaft is connected to the rotating frame. A movable motor is installed on the outer wall of each rotating frame, and a third threaded rod is installed at the output end of each movable motor. The third threaded rod extends into the interior of the rotating frame.

[0013] Preferably, the surface of the third threaded rod is fitted with a third threaded sleeve, and the third threaded sleeve is slidably connected to the rotating frame and connected to the connecting plate.

[0014] Preferably, a power motor is installed at the top of each connecting block on one side of the rotating shaft, a worm gear is installed at the output end of each power motor, and a worm wheel is fitted on the surface of the rotating shaft near the worm gear, with the worm wheel meshing with the worm gear.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the stretching device not only realizes the convenient clamping and lateral stretching of PET film by the biaxial stretching device, but also facilitates the convenient longitudinal scraping and wrinkle removal of PET film by the biaxial stretching device, and facilitates the multi-position adjustment and adaptation of the biaxial stretching device to the wrinkled area of ​​PET film, but also improves the flatness of PET film and improves the quality and efficiency of stretching PET film by the biaxial stretching device.

[0016] The lifting cylinder drives the shaft seat to move via the lifting push rod, which in turn drives the moving roller to move. The clamping frame provides sliding support for the shaft seat, and the moving roller drives the fixed plate to move. The fixed plate then inserts the PET film into the fixing groove to secure it. The servo motor drives the first threaded rod to rotate, which in turn drives the first threaded sleeve to move. The first threaded sleeve drives the moving plate to move, and the moving plate drives the clamping frame, the moving roller, the fixed roller, and the clamped PET film to move, thus facilitating the convenient lateral stretching of the PET film. This achieves convenient clamping and lateral stretching of the PET film by the bidirectional stretching device, making it easy to stretch the PET film to the required length according to the usage requirements and improving the convenience of lateral stretching of the PET film.

[0017] A stepper motor drives the second threaded rod to rotate, which in turn drives the second threaded seat to move. The second threaded seat then drives the connecting block to move, which in turn drives the rotating shaft, rotating frame, connecting plate, T-frame, clamping frame, and scraper to move to a suitable position for easy lateral adjustment of the scraper and clamping frame position. A moving motor drives the third threaded rod to rotate, which in turn drives the third threaded sleeve to move. The third threaded sleeve then drives the connecting plate to move, which in turn drives the T-frame, scraper, clamping frame, and clamping cylinder to move to a suitable position. The clamping cylinder, via the clamping push rod, drives the clamping frame to move, which in turn drives the scraper to move, allowing the scraper to clamp the PET film. The moving motor is then opened in the reverse direction, and it drives the scraper to move, facilitating easy longitudinal scraping and wrinkle removal of the PET film. This achieves easy longitudinal scraping and wrinkle removal of the PET film by the biaxial stretching device, improving the flatness of the PET film.

[0018] The power motor drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel then drives the rotating shaft to rotate, which in turn drives the rotating frame, connecting plate, T-shaped frame, scraper, and clamping frame to rotate. This allows for convenient circumferential rotation and position adjustment of the clamping frame and scraper, facilitating multi-position adjustment and adaptation to different crease paths of the PET film. This enables the biaxial stretching device to adapt to multi-position adjustment of the PET film crease area, improving the quality and efficiency of the biaxial stretching device in stretching the PET film. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the rotating shaft of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the third threaded sleeve of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the second transverse moving frame of this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the movable roller of this utility model;

[0025] Figure 7 This is a front view schematic diagram of the clamping frame of this utility model;

[0026] Figure 8 This is a three-dimensional structural diagram of the clamping frame of this utility model.

[0027] In the diagram: 1. Tensioning frame; 2. Support frame; 3. First transverse moving frame; 4. Moving plate; 5. Pressing frame; 6. Second transverse moving frame; 7. Rotating frame; 8. Connecting plate; 9. T-shaped frame; 10. Scraper; 11. Clamping frame; 12. Servo motor; 13. First threaded rod; 14. First threaded sleeve; 15. Lifting cylinder; 16. Lifting push rod; 17. Shaft seat; 18. Moving roller; 19. Fixed roller; 20. Fixed plate; 21. Fixed groove; 22. Stepper motor; 23. Second threaded seat; 24. Second threaded rod; 25. Worm gear; 26. Rotating shaft; 27. Worm; 28. Power motor; 29. ​​Moving motor; 30. Third threaded rod; 31. Third threaded sleeve; 32. Clamping cylinder; 33. Clamping push rod; 34. Connecting block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figure 1-8 This utility model provides an embodiment of a PET film biaxial stretching device, comprising a stretching frame 1 and a support frame 2. The support frame 2 is symmetrically mounted on the top of the stretching frame 1. First transverse moving frames 3 are symmetrically mounted on the top of the stretching frame 1 between the two sides of the support frame 2. Moving plates 4 are slidably mounted on the top of each of the first transverse moving frames 3. Pressing frames 5 are mounted on the top of each of the moving plates 4. Second transverse moving frames 6 are mounted on the bottom of the support frame 2 and on the top of the stretching frame 1 below the support frame 2. Rotating frames 7 are movably mounted on the top of each of the second transverse moving frames 6. Connecting plates 8 are slidably mounted on the top of each of the rotating frames 7. T-shaped frames 9 are mounted on the outer wall of each connecting plate 8. Clamping cylinders 32 are mounted on the top of each T-shaped frame 9. Clamping push rods 33 are mounted on the output ends of each clamping cylinder 32. Clamping frames 11 are mounted on the top of each clamping push rod 33. Multiple sets of equally spaced scrapers 10 are movably mounted inside each clamping frame 11, and the scrapers 10 extend to the outside of the clamping frame 11. The outer walls of the first transverse moving frames 3 are... Servo motors 12 are installed on the walls. A first threaded rod 13 is installed at the output end of each servo motor 12, extending into the interior of the first transverse moving frame 3. A first threaded sleeve 14 is fitted onto the surface of the first threaded rod 13, and the first threaded sleeve 14 is slidably connected to the first transverse moving frame 3 and connected to the moving plate 4. Lifting cylinders 15 are symmetrically installed at the top of the clamping frame 5. Lifting push rods 16 are installed at the output ends of each lifting cylinder 15. 6 extends into the interior of the clamping frame 5. The end of the lifting push rod 16 away from the lifting cylinder 15 is equipped with a bearing seat 17, and the bearing seat 17 is slidably connected to the clamping frame 5. The clamping frame 5 above the moving plate 4 is equipped with a fixed roller 19. The clamping frame 5 above the fixed roller 19 is equipped with a moving roller 18, and the moving roller 18 is connected to the bearing seat 17. The bottom end of the moving roller 18 on one side of the fixed roller 19 is equipped with a fixed plate 20, and the top end of the fixed roller 19 on one side of the moving roller 18 is equipped with a fixed groove 21.

[0030] One end of the PET film is manually installed between a set of moving rollers 18 and fixed rollers 19, and the other end is installed between another set of moving rollers 18 and fixed rollers 19. The lifting cylinder 15 is activated. Supported by the pressing frame 5, the lifting cylinder 15 moves the shaft seat 17 via the lifting push rod 16. The shaft seat 17 moves the moving rollers 18. The pressing frame 5 provides sliding support for the shaft seat 17. The moving rollers 18 move the fixing plate 20, which then inserts the PET film into the fixing groove 21 to secure it. The servo motor 12 is then activated, and the first transverse moving frame 3... With the support of the servo motor 12, the first threaded rod 13 is driven to rotate. Under the threaded connection between the first threaded rod 13 and the first threaded sleeve 14, the first threaded rod 13 drives the first threaded sleeve 14 to move. The first threaded sleeve 14 drives the moving plate 4 to move. The moving plate 4 drives the pressing frame 5, the moving roller 18, the fixed roller 19, and the clamped PET film to move, so as to facilitate the convenient lateral stretching of the PET film. This realizes the convenient clamping and lateral stretching of the PET film by the bidirectional stretching device, which makes it convenient to stretch the PET film to the corresponding length according to the required usage requirements, and improves the convenience of lateral stretching of the PET film.

[0031] Stepper motors 22 are installed on the outer wall of the second transverse moving frame 6. The output end of each stepper motor 22 is equipped with a second threaded rod 24, which extends into the interior of the second transverse moving frame 6. A second threaded seat 23 is fitted on the surface of the second threaded rod 24, and the second threaded seat 23 is slidably connected to the second transverse moving frame 6. A connecting block 34 is installed on the top of each second threaded seat 23, and a rotating shaft 26 is movably installed on the top of each connecting block 34. The rotating shaft 26 is connected to the rotating frame 7. A moving motor 29 is installed on the outer wall of the rotating frame 7. A third threaded rod 30 is installed on the output end of each moving motor 29, and the third threaded rod 30 extends into the interior of the rotating frame 7. A third threaded sleeve 31 is fitted on the surface of each third threaded rod 30, and the third threaded sleeve 31 is slidably connected to the rotating frame 7. The third threaded sleeve 31 is also connected to the connecting plate 8.

[0032] When longitudinal wrinkle removal is required, stepper motor 22 is activated. Supported by the second transverse moving frame 6, stepper motor 22 drives the second threaded rod 24 to rotate. With the threaded connection between the second threaded rod 24 and the second threaded seat 23, the second threaded rod 24 drives the second threaded seat 23 to move. The second threaded seat 23 drives the connecting block 34 to move. The connecting block 34 drives the rotating shaft 26, rotating frame 7, connecting plate 8, T-shaped frame 9, clamping frame 11, and scraper 10 to move to a suitable position to facilitate transverse adjustment of the scraper 10 and clamping frame 11. Then, moving motor 29 is activated. Supported by the rotating frame 7, moving motor 29 drives the third threaded rod 30 to rotate. With the threaded connection between the third threaded rod 30 and the third threaded sleeve 31... Under the threaded connection, the third threaded rod 30 drives the third threaded sleeve 31 to move, the third threaded sleeve 31 drives the connecting plate 8 to move, and the connecting plate 8 drives the T-shaped frame 9, scraper 10, clamping frame 11, and clamping cylinder 32 to move to the appropriate position. The clamping cylinder 32 is opened, and under the support of the T-shaped frame 9, the clamping cylinder 32 drives the clamping frame 11 to move via the clamping push rod 33. The clamping frame 11 drives the scraper 10 to move, so that the scraper 10 can clamp the PET film. The moving motor 29 is opened in the opposite direction, and the moving motor 29 drives the scraper 10 to move, so as to facilitate the longitudinal scraping and wrinkle removal of the PET film. This realizes the convenient longitudinal scraping and wrinkle removal of the PET film by the biaxial stretching device, and improves the flatness of the PET film.

[0033] A power motor 28 is installed on the top of the connecting block 34 on one side of the rotating shaft 26. A worm 27 is installed on the output end of the power motor 28. A worm wheel 25 is fitted on the surface of the rotating shaft 26 near the worm 27, and the worm wheel 25 meshes with the worm 27.

[0034] When the power motor 28 is turned on, supported by the connecting block 34, the power motor 28 drives the worm gear 27 to rotate. Under the meshing of the worm gear 27 and the worm wheel 25, the worm gear 27 drives the worm wheel 25 to rotate, and the worm wheel 25 drives the rotating shaft 26 to rotate. The rotating shaft 26 drives the rotating frame 7, the connecting plate 8, the T-shaped frame 9, the scraper 10, and the clamping frame 11 to rotate, so as to facilitate the circumferential rotation adjustment of the clamping frame 11 and the scraper 10. This facilitates multi-position adjustment and adaptation to the wrinkled area of ​​the PET film, and makes it easier to adapt to different wrinkled paths of the PET film. This realizes the multi-position adjustment and adaptation of the biaxial stretching device to the wrinkled area of ​​the PET film, and improves the quality and efficiency of the biaxial stretching device in stretching the PET film.

[0035] In this embodiment, during use: the lifting cylinder 15 drives the shaft seat 17 to move via the lifting push rod 16, the shaft seat 17 drives the moving roller 18 to move, the clamping frame 5 provides sliding support for the shaft seat 17, the moving roller 18 drives the fixed plate 20 to move, and the fixed plate 20 clamps the PET film into the fixed groove 21 to easily fix the PET film. The servo motor 12 drives the first threaded rod 13 to rotate, the first threaded rod 13 drives the first threaded sleeve 14 to move, the first threaded sleeve 14 drives the moving plate 4 to move, and the moving plate 4 drives the clamping frame 5, the moving roller 18, the fixed roller 19, and the clamped PET film to move, so as to easily stretch the PET film laterally. When it is necessary to remove wrinkles longitudinally, the stepper motor 22 drives the second threaded rod 24 to rotate, the second threaded rod 24 drives the second threaded seat 23 to move, the second threaded seat 23 drives the connecting block 34 to move, and the connecting block 34 drives the rotating shaft 26, the rotating frame 7, the connecting plate 8, the T-shaped frame 9, the clamping frame 11, and the scraper 10 to move to a suitable position to facilitate lateral adjustment. At the positions of scraper 10 and clamping frame 11, the moving motor 29 drives the third threaded rod 30 to rotate, the third threaded rod 30 drives the third threaded sleeve 31 to move, the third threaded sleeve 31 drives the connecting plate 8 to move, and the connecting plate 8 drives the T-shaped frame 9, scraper 10, clamping frame 11, and clamping cylinder 32 to move to the appropriate positions. The clamping cylinder 32 drives the clamping frame 11 to move via the clamping push rod 33, and the clamping frame 11 drives the scraper 10 to move, so that the scraper 10 can clamp the PET film. The moving motor 29 is then turned on in the opposite direction. The moving motor 29 drives the scraper 10 to move, so as to facilitate the longitudinal scraping and removal of wrinkles from the PET film. The power motor 28 drives the worm gear 27 to rotate, the worm gear 27 drives the worm wheel 25 to rotate, the worm wheel 25 drives the rotating shaft 26 to rotate, and the rotating shaft 26 drives the rotating frame 7, the connecting plate 8, the T-shaped frame 9, the scraper 10, and the clamping frame 11 to rotate, so as to facilitate the circumferential rotation adjustment of the clamping frame 11 and the scraper 10 to adapt to multiple positions in the wrinkled area of ​​the PET film, thereby completing the use of the stretching device.

Claims

1. A PET film biaxial stretching apparatus characterized by: The system includes a tension frame (1) and a support frame (2). The top of the tension frame (1) is symmetrically equipped with a support frame (2). The top of the tension frame (1) between the two sides of the support frame (2) is symmetrically equipped with a first transverse moving frame (3). The top of the first transverse moving frame (3) is slidably equipped with a moving plate (4). The top of the moving plate (4) is equipped with a clamping frame (5). The bottom of the support frame (2) and the top of the tension frame (1) below the support frame (2) are equipped with a second transverse moving frame (6). The top of the second transverse moving frame (6) is movably equipped with a rotating frame (7). The top of the rotating frame (7) is slidably equipped with a connecting plate (8). The outer wall of the connecting plate (8) is equipped with a T-shaped frame (9). The top of the T-shaped frame (9) is equipped with a clamping cylinder (32). 2) All output ends are equipped with clamping push rods (33), and the top of each clamping push rod (33) is equipped with a clamping frame (11). Multiple sets of scrapers (10) with equal spacing are movably installed inside each clamping frame (11), and the scrapers (10) extend to the outside of the clamping frame (11). A servo motor (12) is installed on the outer wall of the first transverse moving frame (3). The output end of the servo motor (12) is equipped with a first threaded rod (13), and the first threaded rod (13) extends to the inside of the first transverse moving frame (3). A first threaded sleeve (14) is fitted on the surface of the first threaded rod (13), and the first threaded sleeve (14) is slidably connected to the first transverse moving frame (3), and the first threaded sleeve (14) is connected to the moving plate (4). A lifting cylinder (15) is symmetrically installed at the top of the pressing frame (5).

2. The PET film biaxial stretching device according to claim 1, characterized in that: The output end of each lifting cylinder (15) is equipped with a lifting push rod (16), and the lifting push rod (16) extends into the interior of the clamping frame (5). The end of the lifting push rod (16) away from the lifting cylinder (15) is equipped with a bearing seat (17), and the bearing seat (17) is slidably connected to the clamping frame (5).

3. The PET film biaxial stretching device according to claim 1, characterized in that: The pressing frame (5) above the movable plate (4) is equipped with a fixed roller (19), and the pressing frame (5) above the fixed roller (19) is equipped with a movable roller (18), and the movable roller (18) is connected to the bearing seat (17).

4. The PET film biaxial stretching device according to claim 3, characterized in that: A fixing plate (20) is installed at the bottom of the movable roller (18) on one side of the fixed roller (19), and a fixing groove (21) is provided at the top of the fixed roller (19) on one side of the movable roller (18).

5. The PET film biaxial stretching device according to claim 1, characterized in that: Stepper motors (22) are installed on the outer wall of the second transverse moving frame (6). The output end of each stepper motor (22) is equipped with a second threaded rod (24), and the second threaded rod (24) extends into the interior of the second transverse moving frame (6). A second threaded seat (23) is fitted on the surface of the second threaded rod (24), and the second threaded seat (23) is slidably connected to the second transverse moving frame (6).

6. The PET film biaxial stretching device according to claim 5, characterized in that: The top of the second threaded seat (23) is equipped with a connecting block (34), and the top of the connecting block (34) is movably equipped with a rotating shaft (26), and the rotating shaft (26) is connected to the rotating frame (7). The outer wall of the rotating frame (7) is equipped with a moving motor (29), and the output end of the moving motor (29) is equipped with a third threaded rod (30), and the third threaded rod (30) extends into the interior of the rotating frame (7).

7. The PET film biaxial stretching device according to claim 6, characterized in that: The surface of the third threaded rod (30) is fitted with a third threaded sleeve (31), and the third threaded sleeve (31) is slidably connected to the rotating frame (7), and the third threaded sleeve (31) is connected to the connecting plate (8).

8. A PET film biaxial stretching device according to claim 6, characterized in that: The top of the connecting block (34) on one side of the rotating shaft (26) is equipped with a power motor (28), and the output end of the power motor (28) is equipped with a worm (27). The surface of the rotating shaft (26) near the worm (27) is fitted with a worm wheel (25), and the worm wheel (25) meshes with the worm (27).

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