Rolling guide device for PET (Polyethylene Terephthalate) heat-shrinkable tube

Abstract

The utility model relates to the technical field of heat shrink tube production equipment, in particular to a PET heat shrink tube rolling guide device. Comprising a base, a plurality of supporting stand columns are fixedly connected to the bottom of the base, a first vertical plate and a second vertical plate are fixedly connected to the base, a rolling assembly and a transmission assembly located below the rolling assembly are arranged between the first vertical plate and the second vertical plate, and a guide frame located on one side of the rolling assembly and the transmission assembly is arranged between the first vertical plate and the second vertical plate; a limiting guide assembly is arranged on the side, away from the rolling assembly and the transmission assembly, of the guide frame, and a supporting guide assembly is arranged on the side, located on the first vertical plate and the second vertical plate, of the base. According to the PET heat shrink tube flattening device, the PET heat shrink tube can be limited through the limiting guide assembly, and the PET heat shrink tube is supported through the supporting guide assembly, so that the PET heat shrink tube is prevented from deviating or inclining in the flattening process, and the stability of the PET heat shrink tube in the machining process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrinkable tube production equipment, in particular to a rolling and guiding device for PET heat shrinkable tubes. Background Art

[0002] In the production process of heat shrinkable tubes, PET heat shrinkable tubes are widely used in the protection of wires, cables and electronic components due to their good physical properties and chemical stability. Flat PET heat shrinkable tubes occupy less volume space because of their flattened shape, which is convenient for transportation and can reduce transportation costs.

[0003] When in use, the flat PET heat shrinkable tube is sleeved on the object to be protected. It has the special function of shrinking when heated. It can shrink when heated to above 95°C, and is easy to use. It is used for the outer sheaths of electrolytic capacitors, inductance components, battery monomers and battery packs, and the product has good high-temperature resistance and no secondary shrinkage.

[0004] In the prior art, when flattening the PET heat shrinkable tube, due to the lack of a guiding and fixing device, the heat shrinkable tube is prone to distortion during the flattening process, resulting in creases and damaging the shrinkage performance of the product. Summary of the Invention

[0005] The technical problem to be solved by the utility model is that in the prior art, when flattening the PET heat shrinkable tube, there is a lack of a guiding and fixing device, which easily causes creases in the PET heat shrinkable tube and affects its performance.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is: a rolling and guiding device for PET heat shrinkable tubes, including a base, a plurality of support columns are fixedly connected to the bottom of the base, a first vertical plate and a second vertical plate are fixedly connected to the base, a rolling assembly and a transmission assembly located below the rolling assembly are arranged between the first vertical plate and the second vertical plate, a guiding frame body is arranged between the first vertical plate and the second vertical plate on one side of the rolling assembly and the transmission assembly, a limiting and guiding assembly is arranged on the side of the guiding frame body far away from the rolling assembly and the transmission assembly, and a support and guiding assembly is arranged on one side of the base where the first vertical plate and the second vertical plate are located.

[0007] As a further improvement of the utility model, the rolling assembly includes a first bracket arranged on one side of the second vertical plate and fixedly connected thereto, a first motor is fixedly installed on the first bracket, a rotating shaft passing through the second vertical plate and rotatably connected to the first vertical plate is arranged at the output end of the first motor, and a rolling roller located between the first vertical plate and the second vertical plate is fixedly sleeved on the outer side of the rotating shaft.

[0008] As a further improvement of the utility model, both ends of the rotating shaft are rotatably connected to the first vertical plate and the second vertical plate respectively through first bearings.

[0009] As a further improvement of the present utility model, the transmission assembly includes a second bracket disposed on one side of the first vertical plate and fixedly connected thereto. A second motor is fixedly installed on the second bracket. The output end of the second motor is provided with a first transmission roller that penetrates through the first vertical plate and is rotatably connected to the second vertical plate. One side of the first transmission roller is provided with a second transmission roller that is rotatably connected to both the first vertical plate and the second vertical plate. The first transmission roller and the second transmission roller are connected by a transmission belt.

[0010] As a further improvement of the present utility model, both ends of the first transmission roller are respectively rotatably connected to the first vertical plate and the second vertical plate through second bearings, and both ends of the second transmission roller are respectively rotatably connected to the first vertical plate and the second vertical plate through third bearings.

[0011] As a further improvement of the present utility model, the limit guiding assembly includes a bidirectional lead screw rotatably connected to the first vertical plate and the second vertical plate. One end of the bidirectional lead screw penetrates through the first vertical plate and is fixedly connected to a first crank. A fixed rod is fixedly connected between the first vertical plate and the second vertical plate and is located below the bidirectional lead screw. Two symmetrically arranged first lead screw sleeves are threadedly connected to the bidirectional lead screw. Two sliding sleeves are slidably connected to the fixed rod and are located below the first lead screw sleeves. The first lead screw sleeve and the sliding sleeve on the same side are fixedly connected by a connecting rod.

[0012] As a further improvement of the present utility model, both ends of the bidirectional lead screw are respectively rotatably connected to the first vertical plate and the second vertical plate through fourth bearings.

[0013] As a further improvement of the present utility model, the support guiding assembly includes a first fixing plate and a second fixing plate disposed at the bottom of the base and fixedly connected thereto. A rotating rod is rotatably connected between the first fixing plate and the second fixing plate. One end of the rotating rod penetrates through the second fixing plate and is fixedly connected to a second crank. Two symmetrically arranged first bevel gears are fixedly connected to the rotating rod. A second bevel gear meshing with each of the two first bevel gears is provided on one side of each of the two first bevel gears. A lead screw that penetrates through the base and is rotatably connected to the base is fixedly connected to the top of each of the two second bevel gears. A second lead screw sleeve is threadedly connected to each of the two lead screws. A right-angle plate is fixedly connected to one side of each of the two second lead screw sleeves. The two right-angle plates are fixedly connected by a connecting rod. A support roller is rotatably connected to the outside of the connecting rod.

[0014] As a further improvement of the present utility model, the first fixing plate and the second fixing plate are respectively located at both ends of the bottom of the base. Both ends of the rotating rod are respectively rotatably connected to the first fixing plate and the second fixing plate through fifth bearings. Both of the two lead screws are rotatably connected to the base through sixth bearings. Both ends of the connecting rod are rotatably connected to the support roller through seventh bearings.

[0015] As a further improvement of the present utility model, strip-shaped holes are provided at both ends of the guiding frame body, and the guiding frame body is connected to the first vertical plate and the second vertical plate through the strip-shaped holes. A guiding channel is provided inside the guiding frame body, and the size of the guiding channel gradually decreases along the conveying direction.

[0016] Advantages of the present utility model: The present utility model can limit the PET heat-shrinkable tube through the limit guiding component and support the PET heat-shrinkable tube through the support guiding component, thereby avoiding the situation that the PET heat-shrinkable tube is offset or tilted during the flattening process, and improving the stability of the PET heat-shrinkable tube during the processing process. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of a PET heat-shrinkable tube rolling guiding device of the present utility model;

[0018] Figure 2 is a PET heat-shrinkable tube rolling guiding device of the present utility model Figure 1 structural schematic diagram of another perspective;

[0019] Figure 3 is the partial structural schematic diagram of a PET heat-shrinkable tube rolling guiding device of the present utility model;

[0020] Figure 4 is the structural schematic diagram of the transmission component of a PET heat-shrinkable tube rolling guiding device of the present utility model;

[0021] Figure 5 is the structural schematic diagram of the limit guiding component of a PET heat-shrinkable tube rolling guiding device of the present utility model;

[0022] Figure 6 is the structural schematic diagram of the support guiding component of a PET heat-shrinkable tube rolling guiding device of the present utility model.

[0023] As shown in the figure: 1. Base; 2. Support column; 3. First vertical plate; 4. Second vertical plate; 5. Rolling assembly; 5.1 First bracket; 5.2 First motor; 5.3 Rotating shaft; 5.4 Rolling roller; 5.5 First bearing; 6. Transmission assembly; 6.1 Second bracket; 6.2 Second motor; 6.3 First transmission roller; 6.4 Second transmission roller; 6.5 Transmission belt; 6.6 Second bearing; 6.7 Third bearing; 7. Limit guiding assembly; 7.1 Bi-directional lead screw; 7.2 First crank; 7.3 Fixed rod; 7.4 First lead screw sleeve; 7.5 Sliding sleeve; 7.6 Connecting rod; 7.7 Fourth bearing; 8. Support guiding assembly; 8.1 First fixed plate; 8.2 Second fixed plate; 8.3 Rotating rod; 8.4 Second crank; 8.5 First bevel gear; 8.6 Second bevel gear; 8.7 Lead screw; 8.8 Second lead screw sleeve; 8.9 Right-angle plate; 8.10 Connecting rod; 8.11 Support roller; 8.12 Fifth bearing; 8.13 Sixth bearing; 8.14 Seventh bearing; 9. Guide frame; 10. Strip-shaped hole. Detailed implementation mode

[0024] In this specification, the orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined relative to its structure, and they are relative concepts. Therefore, it is possible to change accordingly according to its different positions and different usage states; so, these or other orientation terms should not be interpreted as restrictive terms.

[0025] In this specification, the singular forms of "a", "the" and "said" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in combination with the accompanying drawings and implementation modes. It should be understood that the implementation modes described herein are only used to explain this application and are not used to limit this application.

[0027] The present utility model provides as attached Figures 1-6A PET heat-shrinkable tube rolling and guiding device shown in the figure includes a base 1. Multiple support columns 2 are fixedly connected to the bottom of the base 1. A first vertical plate 3 and a second vertical plate 4 are fixedly connected to the base 1. A rolling assembly 5 and a transmission assembly 6 located below the rolling assembly 5 are arranged between the first vertical plate 3 and the second vertical plate 4. A guiding frame 9 located on one side of the rolling assembly 5 and the transmission assembly 6 is arranged between the first vertical plate 3 and the second vertical plate 4. A limiting and guiding assembly 7 is arranged on the side of the guiding frame 9 away from the rolling assembly 5 and the transmission assembly 6. A support and guiding assembly 8 is arranged on the base 1 on one side of the first vertical plate 3 and the second vertical plate 4.

[0028] As Figure 2 and Figure 3 shown, in the rolling assembly 5 of the present utility model, it includes a first bracket 5.1 arranged on one side of the second vertical plate 4 and fixedly connected thereto. A first motor 5.2 is fixedly installed on the first bracket 5.1. The output end of the first motor 5.2 is provided with a rotating shaft 5.3 that penetrates through the second vertical plate 4 and is rotatably connected to the first vertical plate 3. A rolling roller 5.4 located between the first vertical plate 3 and the second vertical plate 4 is fixedly sleeved on the outer side of the rotating shaft 5.3. Both ends of the rotating shaft 5.3 are rotatably connected to the first vertical plate 3 and the second vertical plate 4 respectively through first bearings 5.5, improving the stability of the rotating shaft 5.3 during rotation.

[0029] As Figure 3 and Figure 4 shown, in the transmission assembly 6 of the present utility model, it includes a second bracket 6.1 arranged on one side of the first vertical plate 3 and fixedly connected thereto. A second motor 6.2 is fixedly installed on the second bracket 6.1. The output end of the second motor 6.2 is provided with a first transmission roller 6.3 that penetrates through the first vertical plate 3 and is rotatably connected to the second vertical plate 4. A second transmission roller 6.4 rotatably connected to both the first vertical plate 3 and the second vertical plate 4 is arranged on one side of the first transmission roller 6.3. The first transmission roller 6.3 and the second transmission roller 6.4 are connected by a transmission belt 6.5. Both ends of the first transmission roller 6.3 are rotatably connected to the first vertical plate 3 and the second vertical plate 4 respectively through second bearings 6.6. Both ends of the second transmission roller 6.4 are rotatably connected to the first vertical plate 3 and the second vertical plate 4 respectively through third bearings 6.7, improving the stability of the first transmission roller 6.3 and the second transmission roller 6.4 during rotation.

[0030] As Figure 5As shown in the figure, in the present utility model, the limit guiding assembly 7 includes a bidirectional lead screw 7.1 rotatably connected to the first vertical plate 3 and the second vertical plate 4. One end of the bidirectional lead screw 7.1 passes through the first vertical plate 3 and is fixedly connected to a first crank 7.2. A fixed rod 7.3 is fixedly connected between the first vertical plate 3 and the second vertical plate 4 and is located below the bidirectional lead screw 7.1. Two symmetrically arranged first lead screw sleeves 7.4 are threadedly connected to the bidirectional lead screw 7.1. Two sliding sleeves 7.5 are slidably connected to the fixed rod 7.3 and are located below the first lead screw sleeves 7.4. The first lead screw sleeve 7.4 and the sliding sleeve 7.5 on the same side are fixedly connected by a connecting rod 7.6. Both ends of the bidirectional lead screw 7.1 are rotatably connected to the first vertical plate 3 and the second vertical plate 4 respectively through fourth bearings 7.7, improving the stability of the bidirectional lead screw 7.1 during rotation.

[0031] As Figure 2 and Figure 6 shown in the figure, in the present utility model, the support guiding assembly 8 includes a first fixing plate 8.1 and a second fixing plate 8.2 provided at the bottom of the base 1 and fixedly connected thereto. A rotating rod 8.3 is rotatably connected between the first fixing plate 8.1 and the second fixing plate 8.2. One end of the rotating rod 8.3 passes through the second fixing plate 8.2 and is fixedly connected to a second crank 8.4. Two symmetrically arranged first bevel gears 8.5 are fixedly connected to the rotating rod 8.3. A second bevel gear 8.6 meshing with each of the two first bevel gears 8.5 is provided on one side of each of the two first bevel gears 8.5. A lead screw 8.7 passing through the base 1 and rotatably connected to the base 1 is fixedly connected to the top of each of the two second bevel gears 8.6. A second lead screw sleeve 8.8 is threadedly connected to each of the two lead screws 8.7. A right-angle plate 8.9 is fixedly connected to one side of each of the two second lead screw sleeves 8.8. The two right-angle plates 8.9 are fixedly connected by a connecting rod 8.10. A support roller 8.11 is rotatably sleeved on the outside of the connecting rod 8.10. The first fixing plate 8.1 and the second fixing plate 8.2 are respectively located at both ends of the bottom of the base 1. Both ends of the rotating rod 8.3 are rotatably connected to the first fixing plate 8.1 and the second fixing plate 8.2 respectively through fifth bearings 8.12. Both of the two lead screws 8.7 are rotatably connected to the base 1 through sixth bearings 8.13, improving the stability of the rotating rod 8.3 and the lead screws 8.7 during rotation. Both ends of the connecting rod 8.10 are rotatably connected to the support roller 8.11 through seventh bearings 8.14, improving the smoothness of the rotation of the support roller 8.11, reducing friction, and facilitating the transmission of the PET heat-shrinkable tube.

[0032] As Figure 1 and Figure 2 shown in the figure, both ends of the guiding frame 9 in the present utility model are provided with strip-shaped holes 10 and are connected to the first vertical plate 3 and the second vertical plate 4 through the strip-shaped holes 10. A guiding channel is provided inside the guiding frame 9 and the size of the guiding channel gradually becomes smaller along the conveying direction.

[0033] Working principle: Before the flattening process of the present utility model, the second crank 8.4 can be controlled to rotate, driving the rotating rod 8.3 to rotate. The rotation of the rotating rod 8.3 drives the two first bevel gears 8.5 to rotate. The first bevel gear 8.5 drives the lead screw 8.7 to rotate through the meshing second bevel gear 8.6. Since the second lead screw sleeve 8.8 is threadedly connected to the lead screw 8.7, and right-angle plates 8.9 are fixedly connected to one side of the two second lead screw sleeves 8.8 and the two right-angle plates 8.9 are fixedly connected by a connecting rod 8.10, when the lead screw 8.7 rotates, the second lead screw sleeve 8.8 will slide upward or downward, thereby adjusting the height of the support roller 8.11 through the right-angle plate 8.9 and the connecting rod 8.10, and further adjusting the height of supporting the PET heat-shrinkable tube, which is applicable to use in different scenarios and meets the requirements of supporting PET heat-shrinkable tubes of different models or sizes;

[0034] Meanwhile, the first crank 7.2 can be controlled to rotate, driving the bidirectional lead screw 7.1 to rotate. Since the two first lead screw sleeves 7.4 are both threadedly connected to the bidirectional lead screw 7.1, and the first lead screw sleeve 7.4 is fixedly connected to a sliding sleeve 7.5 sleeved outside the fixed rod 7.3 through a connecting rod 7.6, when the bidirectional lead screw 7.1 rotates, the two first lead screw sleeves 7.4 will slide towards each other or away from each other, so the distance between the two connecting rods 7.6 can be adjusted to limit PET heat-shrinkable tubes of different models or sizes.

[0035] During the flattening process, the PET heat-shrinkable tube first passes through the support roller 8.11, and then passes through the space formed by the bidirectional lead screw 7.1, the fixed rod 7.3 and the two connecting rods 7.6. Furthermore, the guiding frame 9 plays a role in guiding the output of the PET heat-shrinkable tube, so that the PET heat-shrinkable tube is gradually flattened under the guidance of the guiding frame 9, and then the PET heat-shrinkable tube passes through the gap formed between the rolling roller 5.4 and the conveyor belt 6.5 in a flattened state. At this time, the rolling roller 5.4 flattens the PET heat-shrinkable tube. Specifically, the first motor 5.2 is controlled to start, driving the rotating shaft 5.3 to rotate. The rotation of the rotating shaft 5.3 drives the rolling roller 5.4 to rotate, thereby flattening the PET heat-shrinkable tube. And the second motor 6.2 is started to drive the first transmission roller 6.3 to rotate. Since the first transmission roller 6.3 and the second transmission roller 6.4 are connected by a conveyor belt 6.5, the rotation of the first transmission roller 6.3 will drive the second transmission roller 6.4 to rotate through the conveyor belt 6.5. And at this time, the conveyor belt 6.5 will drive the PET heat-shrinkable tube to move to one side, so that the rolling assembly 5 can continuously flatten the PET heat-shrinkable tube.

[0036] Therefore, by limiting and supporting the PET heat-shrinkable tube through the limiting and guiding assembly 7 and the supporting and guiding assembly 8, the situation that the PET heat-shrinkable tube deviates or tilts during the flattening process can be avoided, thereby improving the stability of the PET heat-shrinkable tube during the processing.

[0037] It can be understood that, since the size of the gap between the rolling roller 5.4 and the conveyor belt 6.5 is quite different from the diameter size of the PET heat-shrinkable tube before being flattened, if the PET heat-shrinkable tube enters directly between the rolling roller 5.4 and the conveyor belt 6.5 in a cylindrical shape, wrinkles will appear on both sides of the PET heat-shrinkable tube after being flattened due to the sudden change in the size of the PET heat-shrinkable tube, thereby reducing the product quality of the PET heat-shrinkable tube, and even causing the product to be scrapped and reducing the yield rate of the product.

[0038] Before the PET heat-shrinkable tube enters the gap between the rolling roller 5.4 and the conveyor belt 6.5, the PET heat-shrinkable tube is guided by the guiding frame 9, so that the PET heat-shrinkable tube is gradually squeezed and flattened by the inner wall of the guiding frame 9 under the guidance of the guiding frame 9, so that the size of the PET heat-shrinkable tube gradually approaches the size of the gap between the rolling roller 5.4 and the conveyor belt 6.5. Furthermore, no wrinkles will appear during the flattening process of the PET heat-shrinkable tube, the state of the PET heat-shrinkable tube after being flattened is smoother, the product quality of the PET heat-shrinkable tube is ensured, and the yield rate of the PET heat-shrinkable tube is increased.

[0039] The edge of the guiding frame 9 is provided with strip-shaped holes, and screws pass through the strip-shaped holes, and then the guiding frame 9 is detachably fixed to the first vertical plate 3 and the second vertical plate 4.

[0040] Through the setting of the strip-shaped holes 10, the position of the guiding frame 9 in the up and down direction is adjustable, so that the outlet position of the guiding frame 9 can be aligned with the gap between the rolling roller 5.4 and the conveyor belt 6.5. Thus, after the PET heat-shrinkable tube is preliminarily flattened by the guiding frame 9, it can enter the gap between the rolling roller 5.4 and the conveyor belt 6.5 in a straight state, further reducing the risk of wrinkles appearing on the PET heat-shrinkable tube, ensuring the product quality of the PET heat-shrinkable tube, and increasing the yield rate of the PET heat-shrinkable tube.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PET heat-shrinkable tube rolling and guiding device, comprising a base (1), wherein a plurality of support columns (2) are fixedly connected to the bottom of the base (1), a first vertical plate (3) and a second vertical plate (4) are fixedly connected to the base (1), a rolling assembly (5) and a transmission assembly (6) located below the rolling assembly (5) are arranged between the first vertical plate (3) and the second vertical plate (4), and the characteristics are as follows: A guiding frame body (9) is arranged between the first vertical plate (3) and the second vertical plate (4) and is located on one side of the rolling assembly (5) and the transmission assembly (6). A limiting and guiding assembly (7) is arranged on the side of the guiding frame body (9) away from the rolling assembly (5) and the transmission assembly (6). A supporting and guiding assembly (8) is arranged on the base (1) on one side of the first vertical plate (3) and the second vertical plate (4).

2. The PET heat-shrinkable tube rolling and guiding device according to claim 1, wherein: The rolling assembly (5) includes a first bracket (5.1) arranged on one side of the second vertical plate (4) and fixedly connected thereto. A first motor (5.2) is fixedly installed on the first bracket (5.1). The output end of the first motor (5.2) is provided with a rotating shaft (5.3) that penetrates through the second vertical plate (4) and is rotatably connected to the first vertical plate (3). A rolling roller (5.4) located between the first vertical plate (3) and the second vertical plate (4) is fixedly sleeved on the outer side of the rotating shaft (5.3).

3. A PET heat-shrinkable tube rolling and guiding device according to claim 2, characterized in that: Both ends of the rotating shaft (5.3) are rotatably connected to the first vertical plate (3) and the second vertical plate (4) respectively through first bearings (5.5).

4. A PET heat-shrinkable tube rolling and guiding device according to claim 1, characterized in that: The transmission assembly (6) includes a second bracket (6.1) arranged on one side of the first vertical plate (3) and fixedly connected thereto. A second motor (6.2) is fixedly installed on the second bracket (6.1). The output end of the second motor (6.2) is provided with a first transmission roller (6.3) that penetrates through the first vertical plate (3) and is rotatably connected to the second vertical plate (4). A second transmission roller (6.4) rotatably connected to both the first vertical plate (3) and the second vertical plate (4) is arranged on one side of the first transmission roller (6.3). The first transmission roller (6.3) and the second transmission roller (6.4) are connected by a transmission belt (6.5).

5. A PET heat-shrinkable tube rolling and guiding device according to claim 4, characterized in that: Both ends of the first transmission roller (6.3) are rotatably connected to the first vertical plate (3) and the second vertical plate (4) respectively through second bearings (6.6). Both ends of the second transmission roller (6.4) are rotatably connected to the first vertical plate (3) and the second vertical plate (4) respectively through third bearings (6.7).

6. The rolling and guiding device for PET heat-shrinkable tube according to claim 1, wherein: The limiting and guiding assembly (7) includes a bidirectional lead screw ( 7.1) rotatably connected to the first vertical plate (3) and the second vertical plate (4). One end of the bidirectional lead screw (7.1) penetrates through the first vertical plate (3) and is fixedly connected to a first crank (7.2). A fixed rod (7.3) located below the bidirectional lead screw (7.1) is fixedly connected between the first vertical plate (3) and the second vertical plate (4). Two symmetrically arranged first lead screw sleeves (7.4) are threadedly connected to the bidirectional lead screw (7.1). Two sliding sleeves (7.5) located below the first lead screw sleeves (7.4) are slidably connected to the fixed rod (7.3). The first lead screw sleeve (7.4) and the sliding sleeve (7.5) on the same side are fixedly connected by a connecting rod (7.6).

7. A PET heat-shrinkable tube rolling and guiding device according to claim 6, characterized in that: Both ends of the bidirectional lead screw (7.1) are rotatably connected to the first vertical plate (3) and the second vertical plate (4) respectively through fourth bearings (7.7).

8. A PET heat-shrinkable tube rolling and guiding device according to claim 1, characterized in that: The support and guide assembly (8) includes a first fixed plate (8.1) and a second fixed plate (8.2) which are arranged at the bottom of the base (1) and fixedly connected thereto. A rotating rod (8.3) is rotatably connected between the first fixed plate (8.1) and the second fixed plate (8.2). One end of the rotating rod (8.3) passes through the second fixed plate (8.2) and is fixedly connected with a second crank (8.4). Two symmetrically arranged first bevel gears (8.5) are fixedly connected to the rotating rod (8.3). A second bevel gear (8.6) meshing with each of the two first bevel gears (8.5) is arranged on one side of each of the two first bevel gears (8.5). A lead screw (8.7) passing through the base (1) and rotatably connected with the base (1) is fixedly connected to the top of each of the two second bevel gears (8.6). A second lead screw sleeve (8.8) is threadedly connected to each of the two lead screws (8.7). A right-angle plate (8.9) is fixedly connected to one side of each of the two second lead screw sleeves (8.8). The two right-angle plates (8.9) are fixedly connected by a connecting rod (8.10). A support roller (8.11) rotatably connected with the connecting rod (8.10) is sleeved outside the connecting rod (8.10).

9. The rolling and guiding device for PET heat-shrinkable tube according to claim 8, wherein: The first fixed plate (8.1) and the second fixed plate (8.2) are respectively located at two ends of the bottom of the base (1). Both ends of the rotating rod (8.3) are rotatably connected to the first fixed plate (8.1) and the second fixed plate (8.2) through fifth bearings (8.12). Both of the two lead screws (8.7) are rotatably connected to the base (1) through sixth bearings (8.13). Both ends of the connecting rod (8.10) are rotatably connected to the support roller (8.11) through seventh bearings (8.14).

10. The PET heat-shrinkable tube rolling and guiding device according to claim 1, wherein: Both ends of the guide frame (9) are provided with strip holes (10) and are connected to the first vertical plate (3) and the second vertical plate (4) through the strip holes (10). A guide channel is arranged inside the guide frame (9), and the size of the guide channel gradually becomes smaller along the conveying direction.

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