Tensioning device for a cross pull machine chain clip guide plate
By employing a sliding connection between the guide plate, track frame, and tensioning assembly in the film stretching machine, the problem of guide plate bending due to temperature changes is solved, ensuring the tension adaptability of the guide plate and improving the film stretching effect and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG SHICHENG PLASTIC MACHINERY
- Filing Date
- 2025-09-08
- Publication Date
- 2026-08-04
AI Technical Summary
The guide plates of existing film stretching machines are bent and deformed due to temperature changes, which affects the film stretching effect and quality.
The guide plate and track frame are connected by a sliding connection, combined with a tensioning assembly including a spring seat, a spring and a tensioning connection seat. The elastic force of the spring adapts to changes in the length of the guide plate and maintains the tensioning effect.
This achieves stability of the guide plate under temperature changes, avoids bending, and ensures uniformity and improved quality of film stretching.
Smart Images
Figure CN224588604U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of film transverse stretching equipment, specifically relating to a tensioning device for a chain clamp guide plate of a transverse stretching machine. Background Technology
[0002] The transverse stretching equipment for thin films (transverse stretching machine) has a guide plate, and the chain clamps cooperate with the guide plate through guide wheels. The guide plate serves as the track for the movement of the chain clamps. In processes such as polyimide film production, the internal temperature of the transverse stretching machine can reach high temperatures, such as above 400°C. The guide plate is relatively long, resulting in significant overall deformation due to thermal expansion. In existing technologies, the guide plate is directly fixed, which causes localized bending due to thermal expansion. Consequently, the position of the chain clamps at these points deviates from the ideal trajectory, affecting the film stretching effect and potentially leading to quality problems such as uneven film thickness. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a tensioning device for the guide plate of the chain clamp of a horizontal stretching machine, which solves the problem that the existing guide plate will bend and deform due to temperature changes, and realizes the ability to adapt to the length change of the guide plate, ensure the tension of the guide plate, and thus achieve an ideal stretching effect.
[0004] According to the technical solution of this utility model, this utility model provides a tensioning device for a guide plate of a horizontal pulling machine chain clamp. The guide plate is slidably connected to the track frame in the length direction. A tensioning assembly is provided on the track frame. The tensioning assembly includes a spring seat, a spring, and a tensioning connecting seat arranged sequentially along the length direction of the guide plate. The spring seat is connected to the track frame, and the tensioning connecting seat is connected to the guide plate.
[0005] In some embodiments, the tensioning assembly further includes a guide post; one of the spring seat and the tensioning connecting seat is fixedly connected to one end of the guide post, and the other of the spring seat and the tensioning connecting seat is slidably connected to the other end of the guide post; the spring is sleeved outside the guide post, and the two ends of the spring are in contact with or connected to the spring seat and the tensioning connecting seat, respectively.
[0006] In some implementations, the guide posts and springs are arranged in two or more sets side by side.
[0007] In some embodiments, the tensioning assembly further includes a guide sleeve, and the portion of the spring seat and tensioning connecting seat that is slidably connected to the guide post has a guide sleeve mounting hole. The guide sleeve is embedded and fixed in the guide sleeve mounting hole, and the guide sleeve is sleeved on the outside of the guide post. The inner side of the guide sleeve is slidably engaged with the outer side of the guide post.
[0008] In some implementations, the spring seat is adjustablely connected to the track frame along the length of the guide plate.
[0009] In some embodiments, the tensioning device is located near the end of the guide plate, the tensioning connecting seat is located on the side of the spring seat near the end of the guide plate, and the spring is a compression spring; the track frame has a spring seat adjustment hole, the spring seat is connected to a T-shaped spring seat slider, the spring seat slider passes through the spring seat adjustment hole, and the spring seat slider and the spring seat are located on both sides of the track frame to form a sliding connection; a spring seat adjustment block is fixedly installed on the side of the track frame away from the end of the guide plate from the spring seat adjustment hole, and a spring seat tightening bolt is threaded onto the spring seat adjustment block, the spring seat tightening bolt abuts against the spring seat slider or the spring seat.
[0010] In some embodiments, the tensioning device is located at one end of the guide plate, and the other end of the guide plate is fixed to the track frame; or, the tensioning device is located at both ends of the guide plate.
[0011] In some embodiments, the guide plate and the track frame are arranged side by side in the horizontal direction. The track frame is provided with a first sliding guide, and the guide plate is provided with a second sliding guide. The first sliding guide and the second sliding guide are slidably connected.
[0012] In some embodiments, the guide plate has a vertical strip cross-section, and a reinforcing plate is provided on the side of the guide plate facing the track frame. The vertical dimension of the reinforcing plate is smaller than that of the guide plate and is located in the middle of the vertical dimension of the guide plate. The second sliding guide is provided on the side of the reinforcing plate facing the track frame.
[0013] In some embodiments, the guide plate is provided with a fine-tuning bolt hole, the guide plate fine-tuning bolt passes through the fine-tuning bolt hole, the guide plate fine-tuning bolt is threadedly fitted with a positioning nut, the guide plate is clamped between the bolt head of the guide plate fine-tuning bolt and the positioning nut, and the end of the guide plate fine-tuning bolt is threadedly connected to the tensioning connection seat.
[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows: In the tensioning device of the guide plate of the cross-stretching machine chain clamp of this utility model, the guide plate is changed to a sliding setting, and a spring is used to provide tension to it. Thus, when the total length of the guide plate changes with temperature, taking thermal expansion as an example, the extended part can slide along the track frame, and the extension part is actively pulled by the tension of the spring. Based on the elasticity of the spring, the tensioning effect can always automatically match the length of the guide plate. In this way, the guide plate always forms the set required trajectory along the track frame without bending or bulging, ensuring the film stretching effect and effectively improving film quality and yield. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram provided by this utility model.
[0016] Figure 2This is a partial cross-sectional structural diagram from a top view provided by this utility model.
[0017] Figure 3 This is a partial cross-sectional structural diagram from the main viewpoint provided by this utility model.
[0018] Figure 4 This is a schematic diagram of the structure from below provided by this utility model.
[0019] Figure 5 This is a three-dimensional structural diagram from another angle provided by this utility model.
[0020] Explanation of reference numerals in the attached figures: 1. Guide plate; 2. Track frame; 3. Spring seat; 4. Spring; 5. Tensioning connecting seat; 6. Guide column; 7. Guide sleeve; 8. Spring seat adjusting hole; 9. Spring seat slider; 10. Spring seat adjusting block; 11. Spring seat tightening bolt; 12. First sliding guide; 13. Second sliding guide; 14. Reinforcing plate; 15. Guide plate fine-tuning bolt; 16. Positioning nut; 17. Chain clamp. Detailed Implementation
[0021] This utility model provides a tensioning device for the guide plate of the chain clamp of a horizontal stretching machine, which solves the problem that the existing guide plate will bend and deform due to temperature changes. It can adapt to the length changes of the guide plate, ensure the tension of the guide plate, and thus achieve an ideal stretching effect.
[0022] Please see Figures 1 to 5 This utility model discloses a tensioning device for a guide plate of a horizontal pulling machine chain clamp. The guide plate 1 is slidably connected to the track frame 2 along its length. A tensioning assembly is provided on the track frame 2, comprising a spring seat 3, a spring 4, and a tensioning connecting seat 5 arranged sequentially along the length of the guide plate 1. The spring seat 3 is connected to the track frame 2, and the tensioning connecting seat 5 is connected to the guide plate 1. In this design, the elasticity of the spring pulls the guide plate 1, thereby achieving a tensioning effect and preventing the thin guide plate 1 from bending due to thermal deformation.
[0023] Please see Figure 2Preferably, the tensioning assembly further includes a guide post 6. One of the spring seat 3 and the tensioning connecting seat 5 is fixedly connected to one end of the guide post 6, and the other of the spring seat 3 and the tensioning connecting seat 5 is slidably connected to the other end of the guide post 6. A spring 4 is sleeved on the outside of the guide post 6, and both ends of the spring 4 are in contact with or connected to the spring seat 3 and the tensioning connecting seat 5, respectively. In this scheme, the setting of the guide post can make the operation of the tensioning assembly more stable. More preferably, there are two or more sets of guide posts 6 and springs 4 arranged side by side, which further ensures the stable movement of the tensioning connecting seat 5. More specifically, for example, the tensioning assembly also includes a guide sleeve 7, such as a copper sleeve. The parts of the spring seat 3 and the tensioning connecting seat 5 that are slidably connected to the guide post 6 have guide sleeve mounting holes. The guide sleeve 7 is embedded and fixed in the guide sleeve mounting holes. The guide sleeve 7 is sleeved on the outside of the guide post 6, and the inner side of the guide sleeve 7 is slidably engaged with the outer side of the guide post 6. The free end of the guide post 6 is only in contact with the guide sleeve 7.
[0024] Preferably, the spring seat 3 is adjustablely connected to the track frame 2 along the length of the guide plate 1, so that the position of the tensioning component and the tension force can be flexibly adjusted according to the situation (e.g., the range of changes in the length of the guide plate).
[0025] Please see Figures 2 to 5In a preferred embodiment, the tensioning device is located near the end of the guide plate 1, and the tensioning connecting seat 5 is located on the side of the spring seat 3 near the end of the guide plate 1. The spring 4 is a compression spring, and its working state is compressed. It provides a force to stretch the end of the guide plate 1 outward through elastic restoring force. The track frame 2 is provided with a spring seat adjustment hole 8. The spring seat 3 is connected to a T-shaped spring seat slider 9. The spring seat slider 9 passes through the spring seat adjustment hole 8, and the spring seat slider 9 and the spring seat 3 are located on both sides of the track frame 2 to form a sliding connection. Specifically, the cross section of the spring seat slider 9 is T-shaped, wherein the vertical part of the T-shape passes through the spring seat adjustment hole 8 and connects to the spring seat 3. The vertical part of the T-shape slides in accordance with the spring seat adjustment hole 8, and the horizontal part of the T-shape and the spring seat 3 clamp the track frame 2 in between, thus forming a sliding limit. A spring seat adjusting block 10 is fixedly installed on the side of the track frame 2 away from the end of the spring seat adjusting hole 8, and a spring seat tightening bolt 11 is threaded onto the spring seat adjusting block 10. The spring seat tightening bolt 11 abuts against the spring seat slider 9 or the spring seat 3. In this scheme, by turning and adjusting the extension length of the spring seat tightening bolt 11, the position of the spring seat adjusting block 10 away from the side of the spring 4 can be controlled, thus forming a limiting support, so that the spring 4 can only recover the compressed elastic deformation to the end of the guide plate 1, thus forming the required tension effect. If the extension length of the spring seat tightening bolt 11 is shortened, the spring 4 will extend towards the spring seat tightening bolt 11. Under the action of the spring 4, the spring seat 3 always abuts against the spring seat tightening bolt 11, so the position adjustment control can be achieved without connecting the spring seat 3 and the spring seat tightening bolt 11.
[0026] Generally speaking, the tensioning device is set at one end of the guide plate 1, and the other end of the guide plate 1 is fixed to the track frame 2; or, the tensioning device is set at both ends of the guide plate 1, which will result in a better tensioning effect.
[0027] Please see Figure 1 , Figure 2 In a specific embodiment, the guide plate 1 and the track frame 2 are arranged side by side in the horizontal direction. The track frame 2 is provided with a first sliding guide 12 and the guide plate 1 is provided with a second sliding guide 13. The first sliding guide 12 and the second sliding guide 13 are slidably connected. The first sliding guide 12 and the second sliding guide 13 are slide rail and slider assemblies. Multiple sets of first sliding guide 12 and second sliding guide 13 are distributed along the length direction of the guide plate 1.
[0028] Preferably, the guide plate 1 has a vertical strip-shaped cross-section. A reinforcing plate 14 is provided on the side of the guide plate 1 facing the track frame 2. The vertical dimension of the reinforcing plate 14 is smaller than that of the guide plate 1 and it is located in the center of the vertical dimension of the guide plate 1. The second sliding guide member 13 is provided on the side of the reinforcing plate 14 facing the track frame 2. In this design, the reinforcing plate 14 is provided to strengthen the relatively thin guide plate 1, further preventing accidental deformation of the guide plate. The guide wheels of the chain clamp 17 are located on both sides of the guide plate 1 to ensure a stable movable connection. The reinforcing plate 14 has a small vertical dimension and does not contact the chain clamp 17, thus not affecting the cooperation between the chain clamp 17 and the guide plate 1.
[0029] Preferably, the guide plate 1 is provided with a fine-tuning bolt hole, through which the guide plate fine-tuning bolt 15 passes. A positioning nut 16 is threadedly fitted onto the guide plate fine-tuning bolt 15. The guide plate 1 is sandwiched between the bolt head of the guide plate fine-tuning bolt 15 and the positioning nut 16 (of course, the diameter of the fine-tuning bolt hole is smaller than that of the bolt head and the positioning nut). The end of the guide plate fine-tuning bolt 15 is threadedly connected to the tensioning connecting seat 5. In the illustrated embodiment, a nut is fixedly provided (e.g., welded) on the tensioning connecting seat 5, thereby forming a threaded connection with the end of the guide plate fine-tuning bolt 15. Further, the tensioning connecting seat 5 may optionally also have a hole at the nut position to accommodate the screwed-in guide plate fine-tuning bolt 15. In other embodiments, the tensioning connecting seat 5 has a threaded hole for threaded connection with the end of the guide plate fine-tuning bolt 15. Due to the presence of the bolt head, the position of the guide plate 1 away from the track frame 2 is limited when the guide plate fine-tuning bolt 15 is screwed into the tensioning connector 5. The positioning nut 16 further limits the position of the guide plate 1 closer to the track frame 2. The connection position of the guide plate 1 can be fine-tuned by adjusting these components, for example, making the end of the guide plate 1 straight. Figure 4 As shown.
[0030] In summary, the tensioning device of the guide plate of the cross-stretching machine chain clamp of this utility model changes the guide plate to a sliding setting and uses a spring to provide tension. Thus, when the total length of the guide plate changes with temperature, taking thermal expansion as an example, the extended part can slide along the track frame, and the extension part is actively pulled by the tension of the spring. Based on the elasticity of the spring, the tensioning effect can always automatically match the length of the guide plate. In this way, the guide plate always forms the set required trajectory along the track frame without bending or bulging, ensuring the film stretching effect and effectively improving film quality and yield.
Claims
1. A tensioning device for a cross pull machine chain link guide plate, characterized by, The guide plate (1) is slidably connected to the track frame (2) in the length direction. The track frame (2) is provided with a tensioning assembly, which includes a spring seat (3), a spring (4), and a tensioning connecting seat (5) arranged sequentially along the length direction of the guide plate (1). The spring seat (3) is connected to the track frame (2), and the tensioning connecting seat (5) is connected to the guide plate (1).
2. The tensioning device for the guide plates of the cross-chains according to claim 1, characterized in that, The tensioning assembly also includes a guide post (6); one of the spring seat (3) and the tensioning connecting seat (5) is fixedly connected to one end of the guide post (6), and the other of the spring seat (3) and the tensioning connecting seat (5) is slidably connected to the other end of the guide post (6); the spring (4) is sleeved on the outside of the guide post (6), and the two ends of the spring (4) are in contact with or connected to the spring seat (3) and the tensioning connecting seat (5) respectively.
3. The tensioning device for the guide plates of the cross-chains according to claim 2, characterized in that, The guide post (6) and the spring (4) are arranged in two or more sets side by side.
4. The tensioning device for the guide plates of the cross-chains according to claim 2, characterized in that, The tensioning assembly also includes a guide sleeve (7). The spring seat (3) and the tensioning connecting seat (5) are provided with guide sleeve mounting holes in the parts that are slidably connected to the guide post (6). The guide sleeve (7) is embedded and fixed in the guide sleeve mounting hole. The guide sleeve (7) is sleeved on the outside of the guide post (6). The inner side of the guide sleeve (7) is slidably engaged with the outer side of the guide post (6).
5. The tensioning device for the guide plates of the crosshead chain links according to claim 1, characterized in that, The spring seat (3) is connected to the track frame (2) in an adjustable position along the length of the guide plate (1).
6. The tensioning device for the guide plates of the crosshead chain links according to claim 1, characterized in that, The tensioning device is located near the end of the guide plate (1), the tensioning connecting seat (5) is located on the side of the spring seat (3) near the end of the guide plate (1), and the spring (4) is a compression spring; The track frame (2) is provided with a spring seat adjustment hole (8), and the spring seat (3) is connected to a T-shaped spring seat slider (9). The spring seat slider (9) passes through the spring seat adjustment hole (8), and the spring seat slider (9) and the spring seat (3) are located on both sides of the track frame (2) to form a sliding connection. The track frame (2) is fixedly provided with a spring seat adjustment block (10) on the side of the spring seat adjustment hole (8) away from the guide plate (1). The spring seat adjustment block (10) is threaded with a spring seat tightening bolt (11), and the spring seat tightening bolt (11) abuts against the spring seat slider (9) or the spring seat (3).
7. The tensioning device for the guide plates of the cross-chains according to any one of claims 1-6, characterized in that, The tensioning device is set at one end of the guide plate (1), and the other end of the guide plate (1) is fixed to the track frame (2); or, the tensioning device is set at both ends of the guide plate (1).
8. The tensioning device for the guide plates of the cross-chains according to any one of claims 1-6, characterized in that, The guide plate (1) and the track frame (2) are arranged side by side in the horizontal direction. The track frame (2) is provided with a first sliding guide (12) and the guide plate (1) is provided with a second sliding guide (13). The first sliding guide (12) and the second sliding guide (13) are slidably connected.
9. The tensioning device for the guide plates of the cross-chains according to any one of claims 1-6, characterized in that, The guide plate (1) has a vertical strip cross section. A reinforcing plate (14) is provided on the side of the guide plate (1) facing the track frame (2). The vertical dimension of the reinforcing plate (14) is smaller than that of the guide plate (1) and is located in the middle of the vertical dimension of the guide plate (1). The second sliding guide (13) is provided on the side of the reinforcing plate (14) facing the track frame (2).
10. The tensioning device for a transverse chain link guide plate according to any one of claims 1-6, characterized in that, The guide plate (1) is provided with a fine adjustment bolt hole. The guide plate fine adjustment bolt (15) passes through the fine adjustment bolt hole. The guide plate fine adjustment bolt (15) is threadedly fitted with a positioning nut (16). The guide plate (1) is sandwiched between the bolt head of the guide plate fine adjustment bolt (15) and the positioning nut (16). The end of the guide plate fine adjustment bolt (15) is threadedly connected to the tensioning connecting seat (5).