High-transparency thermal shrinkage film stretching device
By introducing a pressure block and cam mechanism into the high-transparency heat shrink film stretching device, and combining the coordinated work of preheating, drawing, heat setting and cooling rollers, the problem of uneven flattening and winding of high-transparency heat shrink film during the stretching process is solved, achieving a high-efficiency and neat stretching effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAOMING YINGMEIDA PACKAGING MATERIALS CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-15
AI Technical Summary
Existing high-transparency heat shrink film stretching devices are difficult to flatten during the stretching process, which makes it easy for wrinkles to occur during winding, affecting the neatness of the winding, and the stretching efficiency is low.
A high-transparency heat shrink film stretching device is adopted. By setting pressure blocks and cam mechanisms on the spreading plate, the high-transparency heat shrink film is flattened and stretched by the gravity of the pressure blocks and the pushing action of the cam. Combined with the coordinated work of preheating roller, drawing roller, heat setting roller and cooling roller, the stability and uniformity of the film material are ensured during the stretching process.
It effectively avoids wrinkles during winding, improves the neatness of winding, and enhances the efficiency and effectiveness of stretching by optimizing the stretching process.
Smart Images
Figure CN224240358U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high transparency heat shrink film stretching technology, specifically a high transparency heat shrink film stretching device. Background Technology
[0002] High-transparency heat shrink film is a type of plastic film that can shrink on its own when heated. This film is stretched during the manufacturing process to form a stable stretched state. When heated to a certain temperature, the film will shrink rapidly and stick tightly to the packaged item, forming a tight and beautiful packaging effect. A stretching device is required when stretching high-transparency heat shrink film.
[0003] A high-transparency heat-shrinkable film stretching device typically consists of a preheating roller, a stretching roller, a heat-setting roller, a cooling roller, and a take-up roller. The preheating roller, driven and controlled by an independent digital servo, uniformly heats the film to 120°C, bringing the material into a highly elastic state for easy stretching. The speed difference between the stretching roller and the preheating roller creates longitudinal stretching; the stretching ratio from the slow roller to the fast roller is typically three times. The heat-setting roller keeps the film in a stretched state at a temperature slightly below its melting point, eliminating internal stress and stabilizing molecular orientation. The cooling roller solidifies the stretched structure and locks in its performance. The take-up roller then winds up the film.
[0004] Existing stretching devices have difficulty flattening high-transparency heat shrink film during the stretching process, and the high-transparency heat shrink film is prone to wrinkling during winding, resulting in poor winding neatness; therefore, a high-transparency heat shrink film stretching device is proposed to address the above problems. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a high transparency heat shrink film stretching device.
[0006] The technical solution adopted by this utility model to solve its technical problem is a high-transparency heat shrink film stretching device, including a base, on which a spreading plate is fixedly installed. Two sliding frames are symmetrically and slidably connected to the bottom plate of the spreading plate. Each sliding frame has a lifting groove, and a lifting block is assembled within the lifting groove. A first spring is installed between the lifting block and the inner wall of the lifting groove. A lifting frame is installed on the lifting block. A first motor is mounted on the side wall of the sliding frame via a base. A first cam is mounted on the output shaft of the first motor and rotatably mounted on the side wall of the sliding frame. A pressure block is sleeved on the lifting frame, and a connecting groove is opened within the pressure block. The other end of the lifting frame is slidably assembled into the connecting groove. A sliding plate is installed on the bottom side of the sliding frame. A lifting plate is mounted on the bottom plate of the spreading plate. The structure includes a fixed block, a second spring between the fixed block and the sliding frame, and a fixed frame on the bottom side of the unfolding plate. A second motor is mounted on the fixed frame via a base, and a second cam is mounted on the output shaft of the second motor. The second cam is rotatably mounted on the side wall of the fixed frame. When the high-transparency heat shrink film passes through the unfolding plate, two pressure blocks press against the high-transparency heat shrink film under their own weight. The second cam pushes the two sliding plates to move synchronously in opposite directions, causing the two pressure blocks to move synchronously in opposite directions, thus achieving the flattening and tensioning of the high-transparency heat shrink film. This structure continuously flattens and tensions the high-transparency heat shrink film during winding, preventing wrinkles and improving the neatness of the rolled-up transparent heat shrink film.
[0007] Preferably, the base is equipped with a mounting frame, on which two second guide rollers are rotatably mounted. The two second guide rollers are symmetrically mounted on both sides of the unfolding plate. The base is equipped with multiple first guide rollers, and a preheating roller, a drawing roller, a heat-setting roller, and a cooling roller are rotatably mounted between adjacent first guide rollers. A third guide roller is rotatably mounted on the mounting frame, and a take-up roller is rotatably mounted on the mounting frame. A high-transparency heat-shrinkable film is wound onto the take-up roller. Five sets of drive motors are installed inside the mounting frame, and the output shafts of the five sets of drive motors are respectively connected to the preheating roller, the drawing roller, the heat-setting roller, and the cooling roller. The high-transparency heat shrink film is fixedly connected to the rotating shaft of the take-up roller. A control panel is installed on the side wall of the mounting frame. The high-transparency heat shrink film is heated by the preheating roller, stretched by the drawing roller, and then heat-treated by the heat setting roller to bring the high-transparency heat shrink film to a new stable equilibrium state after stretching. Then the cooling roller cools the high-transparency heat shrink film, then the pressure block flattens and tensions the high-transparency heat shrink film, and finally the take-up roller winds up the high-transparency heat shrink film. During this process, the high-transparency heat shrink film can be easily stretched, which is beneficial to improving the stretching efficiency.
[0008] The advantages of this utility model are:
[0009] 1. In this invention, when the high-transparency heat shrink film passes through the unfolding plate, two pressure blocks press against the high-transparency heat shrink film under their own weight. The second cam pushes two sliding plates to move synchronously in opposite directions, which in turn drives the two pressure blocks to move synchronously in opposite directions, thus achieving the flattening and tensioning of the high-transparency heat shrink film. This structure continuously flattens and tensions the high-transparency heat shrink film during winding, avoiding wrinkles in the high-transparency heat shrink film during winding and improving the neatness of the winding of the transparent heat shrink film.
[0010] 2. This invention uses a preheating roller to heat the high-transparency heat shrink film, a drawing roller to stretch the high-transparency heat shrink film, a heat-setting roller to heat-treat the high-transparency heat shrink film, so that the high-transparency heat shrink film reaches a new stable equilibrium state after stretching, a cooling roller to cool the high-transparency heat shrink film, a pressure block to flatten and tension the high-transparency heat shrink film, and finally a winding roller to wind the high-transparency heat shrink film. In this process, the high-transparency heat shrink film can be stretched conveniently, which is beneficial to improving the stretching efficiency. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a first-person perspective 3D structural diagram;
[0013] Figure 2 A schematic diagram of the three-dimensional structure of the flat panel;
[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the sliding frame;
[0015] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the compact;
[0016] Figure 5 This is a schematic diagram of the three-dimensional structure at the second cam.
[0017] In the diagram: 1. Base; 2. Flat plate; 3. Sliding frame; 4. Lifting groove; 5. Lifting block; 6. First spring; 7. Lifting frame; 8. First motor; 9. First cam; 10. Pressure block; 11. Connecting groove; 12. Sliding plate; 13. Fixing block; 14. Second spring; 15. Fixing frame; 16. Second motor; 17. Second cam; 18. Mounting frame; 19. Second guide roller; 20. First guide roller; 21. Preheating roller; 22. Drawing roller; 23. Heat setting roller; 24. Cooling roller; 25. Third guide roller; 26. Rewinding roller; 27. High transparency heat shrink film; 28. Control panel. Detailed Implementation
[0018] 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 scope of protection of the present utility model.
[0019] Please see Figure 1-5As shown, a high-transparency heat-shrinkable film stretching device includes a base 1, a spreading plate 2 fixedly mounted on the base 1, two sliding frames 3 symmetrically and slidably connected on the bottom plate of the spreading plate 2, a lifting groove 4 opened on the sliding frame 3, a lifting block 5 assembled in the lifting groove 4, a first spring 6 installed between the lifting block 5 and the inner wall of the lifting groove 4, a lifting frame 7 mounted on the lifting block 5, a first motor 8 mounted on the side wall of the sliding frame 3 via a base, a first cam 9 mounted on the output shaft of the first motor 8, the first cam 9 rotatably mounted on the side wall of the sliding frame 3, a pressure block 10 sleeved on the lifting frame 7, a connecting groove 11 opened in the pressure block 10, the other end of the lifting frame 7 slidably assembled in the connecting groove 11, a sliding plate 12 mounted on the bottom side of the sliding frame 3, a fixing block 13 mounted on the bottom plate of the spreading plate 2, a second spring 14 installed between the fixing block 13 and the sliding frame 3, a fixing frame 15 mounted on the bottom side of the spreading plate 2, and the fixing frame 15... A second motor 16 is mounted on the base, and a second cam 17 is mounted on the output shaft of the second motor 16. The second cam 17 is rotatably mounted on the side wall of the fixed frame 15. During operation, the existing stretching device has difficulty flattening the high-transparency heat shrink film 27 during the stretching process. The high-transparency heat shrink film 27 is prone to wrinkles during winding, resulting in poor winding neatness. The high-transparency heat shrink film 27 is stretched by passing through the preheating roller 21, the drawing roller 22, the heat setting roller 23, and the cooling roller 24 in sequence. Then, the high-transparency heat shrink film 27 passes through the first guide roller 20 and the second guide roller 19 and moves to the unfolding plate 2. After passing through the second guide roller 19 and the third guide roller 25, it finally winds around the take-up roller 26. The drive motor operates, driving the take-up roller 26 to rotate, and the take-up roller 26 winds up the high-transparency heat shrink film 27.
[0020] When the high-transparency heat shrink film 27 passes through the unfolding plate 2, the two pressure blocks 10 press on the high-transparency heat shrink film 27 under their own gravity. The second motor 16 operates, driving the second cam 17 to rotate. The second cam 17 pushes the two sliding plates 12 to move synchronously in opposite directions. The two sliding plates 12 drive the two sliding frames 3 to move synchronously in opposite directions. The two sliding frames 3 drive the two lifting frames 7 on them to move synchronously in opposite directions. The two lifting frames 7 drive the two pressure blocks 10 to move synchronously in opposite directions, thus realizing the flattening and tensioning of the high-transparency heat shrink film 27.
[0021] At the same time, the two sets of first motors 8 operate, driving the first cam 9 to rotate. When the two pressure blocks 10 move to both ends of the high transparency heat shrink film 27, the first cam 9 lifts the lifting frame 7, and the lifting frame 7 drives the pressure blocks 10 to move upward, thus lifting the pressure blocks 10.
[0022] After the second cam 17 pushes the two sliding plates 12 to move synchronously in opposite directions, it will release the two sliding plates 12. Under the tension of the two second springs 14, the two second springs 14 pull the two sliding frames 3 to move synchronously relative to each other. The two sliding frames 3 drive the two pressure blocks 10 to move synchronously relative to each other. Then the first cam 9 no longer lifts the lifting frame 7. Under the downward push of the first spring 6, the first spring 6 pushes the lifting block 5 to move downward. The lifting block 5 drives the lifting frame 7 to move downward. The lifting frame 7 will be suspended in the connecting groove 11 of the pressure block 10, realizing the release of the pressure block 10 by the lifting frame 7. Under its own weight, the pressure block 10 presses down on the high-transparency heat shrink film 27 again. Repeat the above steps to realize the re-flattening and tensioning of the high-transparency heat shrink film 27. This structure continuously flattens and tensions the high-transparency heat shrink film 27 when it is being rolled up, avoiding wrinkles in the high-transparency heat shrink film 27 during winding, which helps to improve the neatness of the winding of the transparent heat shrink film 27.
[0023] Please see Figure 1 As shown, a mounting frame 18 is installed on the base 1. Two second guide rollers 19 are rotatably mounted on the mounting frame 18, and the two second guide rollers 19 are symmetrically installed on both sides of the spreading plate 2. Multiple first guide rollers 20 are installed on the base 1. A preheating roller 21, a drawing roller 22, a heat-setting roller 23, and a cooling roller 24 are rotatably mounted between adjacent first guide rollers 20, respectively. A third guide roller 25 is rotatably mounted on the mounting frame 18. A take-up roller 26 is rotatably mounted on the mounting frame 18, and a high-transparency heat-shrinkable film 27 is wound on the take-up roller 26. Five sets of drive motors are installed inside the mounting frame 18. The output shafts of the five sets of drive motors are fixedly connected to the rotating shafts of the preheating roller 21, the drawing roller 22, the heat-setting roller 23, the cooling roller 24, and the take-up roller 26, respectively. A control panel 28 is installed on the side wall of the mounting frame 18. During operation, when the existing stretching device stretches the high-transparency heat-shrinkable film 27... The high-transparency heat shrink film 27 is difficult to stretch efficiently, resulting in poor stretching efficiency. By operating five sets of drive motors, the preheating roller 21, drawing roller 22, heat setting roller 23, cooling roller 24, and take-up roller 26 are rotated. The preheating roller 21 heats the high-transparency heat shrink film 27, and the drawing roller 22 rotates three times faster than the preheating roller 21, stretching the high-transparency heat shrink film 27. Then, the heat setting roller 23 heats the high-transparency heat shrink film 27, allowing it to reach a new stable equilibrium state after stretching. After that, the cooling roller 24 cools the high-transparency heat shrink film 27. Then, the pressure block 10 flattens and tensions the high-transparency heat shrink film 27. Finally, the take-up roller 26 winds up the high-transparency heat shrink film 27. During this process, the high-transparency heat shrink film 27 can be stretched conveniently, which helps to improve the stretching efficiency.
[0024] Working principle: Existing stretching devices struggle to flatten the high-transparency heat shrink film 27 during the stretching process, leading to wrinkles during winding and poor neatness. The new method stretches the high-transparency heat shrink film 27 by sequentially passing it over the preheating roller 21, drawing roller 22, heat-setting roller 23, and cooling roller 24. Afterward, the film passes over the first guide roller 20 and the second guide roller 19, moves onto the spreading plate 2, then over the second guide roller 19 and the third guide roller 25, and finally winds onto the take-up roller 26. The drive motor... The operation drives the take-up roller 26 to rotate, and the take-up roller 26 winds up the high-transparency heat shrink film 27. When the high-transparency heat shrink film 27 passes the unfolding plate 2, the two pressure blocks 10 press against the high-transparency heat shrink film 27 under their own gravity. The operation of the second motor 16 drives the second cam 17 to rotate. The second cam 17 pushes the two sliding plates 12 to move synchronously in opposite directions. The two sliding plates 12 drive the two sliding frames 3 to move synchronously in opposite directions. The two sliding frames 3 drive the two lifting frames 7 on them to move synchronously in opposite directions. The two lifting frames 7 drive the two pressure blocks 10 to move synchronously in opposite directions, thus flattening the high-transparency heat shrink film 27. Simultaneously, the two sets of first motors 8 operate, driving the first cam 9 to rotate. When the two pressure blocks 10 move to both ends of the high-transparency heat-shrinkable film 27, the first cam 9 lifts the lifting frame 7, which in turn moves the pressure blocks 10 upwards, thus lifting the pressure blocks 10. After the second cam 17 pushes the two sliding plates 12 to move synchronously in opposite directions, it releases the two sliding plates 12. Under the tension of the two second springs 14, the two second springs 14 pull the two sliding frames 3 to move synchronously relative to each other, and the two sliding frames 3 drive the two pressure blocks 10 to move synchronously relative to each other. Afterwards, the first cam 9 no longer lifts the lifting frame 7, and the first spring 6 moves downwards. Under the thrust, the first spring 6 pushes the lifting block 5 to move downward, and the lifting block 5 drives the lifting frame 7 to move downward. The lifting frame 7 will be suspended in the connecting groove 11 of the pressure block 10, so that the lifting frame 7 can release the pressure block 10. Under its own weight, the pressure block 10 presses down on the high transparency heat shrink film 27 again. Repeating the above steps, the high transparency heat shrink film 27 is flattened and tightened again. When the high transparency heat shrink film 27 is rolled up, this structure continuously flattens and tightens the high transparency heat shrink film 27, avoiding wrinkles that easily occur when the high transparency heat shrink film 27 is rolled up, which helps to improve the neatness of the roll-up of the transparent heat shrink film 27.Existing stretching devices struggle to efficiently stretch the high-transparency heat-shrinkable film 27, resulting in poor stretching efficiency. By operating five sets of drive motors to rotate the preheating roller 21, drawing roller 22, heat-setting roller 23, cooling roller 24, and take-up roller 26, the high-transparency heat-shrinkable film 27 can be easily stretched. The preheating roller 21 heats the film, while the drawing roller 22, rotating three times faster, stretches the film. The heat-setting roller 23 then heat-treats the film, bringing it to a stable equilibrium after stretching. The cooling roller 24 cools the film, followed by the pressure block 10 flattening and tensioning it. Finally, the take-up roller 26 winds the film. This improved stretching efficiency significantly enhances the overall stretching capability of the high-transparency heat-shrinkable film 27.
[0025] 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 high-transparency heat-shrinkable film stretching device, characterized in that: Includes a base (1), on which a flat panel (2) is fixedly mounted. Two sliding frames (3) are symmetrically and slidably connected on the bottom plate of the flat panel (2). A lifting groove (4) is provided on each sliding frame (3). A lifting block (5) is assembled inside the lifting groove (4). A first spring (6) is installed between the lifting block (5) and the inner wall of the lifting groove (4). A lifting frame (7) is mounted on the lifting block (5). A first motor (8) is mounted on the side wall of the sliding frame (3) via a base. A first cam (9) is mounted on the output shaft of the lifting frame (7). The first cam (9) is rotatably mounted on the side wall of the sliding frame (3). A pressure block (10) is provided on the outer sleeve of the lifting frame (7). A connecting groove (11) is provided in the pressure block (10). The other end of the lifting frame (7) is slidably assembled in the connecting groove (11). A sliding plate (12) is installed on the bottom side of the sliding frame (3). A fixing block (13) is installed on the bottom plate of the unfolding plate (2). A second spring (14) is installed between the fixing block (13) and the sliding frame (3).
2. The high-transparency heat-shrinkable film stretching device according to claim 1, characterized in that: A mounting bracket (15) is installed on the bottom side of the display plate (2). A second motor (16) is mounted on the mounting bracket (15) via a base. A second cam (17) is mounted on the output shaft of the second motor (16). The second cam (17) is rotatably mounted on the side wall of the mounting bracket (15).
3. The high-transparency heat-shrinkable film stretching device according to claim 1, characterized in that: The base (1) is equipped with a mounting frame (18), and two second guide rollers (19) are rotatably mounted on the mounting frame (18). The two second guide rollers (19) are symmetrically mounted on both sides of the display plate (2).
4. The high-transparency heat-shrinkable film stretching device according to claim 1, characterized in that: The base (1) is equipped with a plurality of first guide rollers (20), and a preheating roller (21), a wire drawing roller (22), a heat setting roller (23) and a cooling roller (24) are rotatably mounted between two adjacent first guide rollers (20).
5. The high-transparency heat-shrinkable film stretching device according to claim 3, characterized in that: A third guide roller (25) is rotatably mounted on the mounting frame (18), and a take-up roller (26) is rotatably mounted on the mounting frame (18). A highly transparent heat-shrinkable film (27) is wound on the take-up roller (26).
6. The high-transparency heat-shrinkable film stretching device according to claim 3, characterized in that: The mounting frame (18) is equipped with five sets of drive motors. The output shafts of the five sets of drive motors are fixedly connected to the rotating shafts of the preheating roller (21), the drawing roller (22), the heat setting roller (23), the cooling roller (24), and the winding roller (26), respectively. The control panel (28) is installed on the side wall of the mounting frame (18).