Plastic stretching and heat setting device

Abstract

The utility model relates to the technical field of high polymer material processing equipment, in particular to a plastic stretching and heat setting device, which comprises a support seat, a plurality of first guide shafts are rotatably connected onto the support seat, a same plastic film is wound on the plurality of first guide shafts, a heating structure is arranged on the support seat, and a plurality of second guide shafts are arranged on the heating structure. The heating structure comprises connecting frames and infrared heating pipes, the two connecting frames are clamped on the supporting base, the multiple infrared heating pipes are installed on the connecting frames, the connecting frames are rotationally connected with screw rods, the screw rods are in threaded connection with connecting rods, the supporting base is fixedly connected with four check blocks, and the four check blocks are connected with the infrared heating pipes. One side of the connecting rod abuts against the two check blocks at the same time, and a stretching structure is arranged on the supporting base. Through the synergistic effect of the preheating zone and the heating zone, the temperature difference between the surface layer and the core layer of the film is reduced, the uniformity and safety of the stretching process are improved, the tearing risk of the film is reduced, and meanwhile the mechanical property and production efficiency of products are improved.

Description

Technical Field

[0001] This utility model relates to a plastic stretching and heat setting device, specifically a plastic stretching and heat setting device, belonging to the technical field of polymer material processing equipment. Background Technology

[0002] In the production of plastic products, stretch heat setting is a key step in improving product performance and quality. This process can improve the crystalline structure of plastics and enhance their mechanical properties, such as increasing strength, toughness, and dimensional stability. Currently, plastic stretch heat setting equipment is widely used in the plastics processing industry. In the production of some plastic films, stretch heat setting is necessary to improve the physical properties of the plastic film.

[0003] However, traditional stretch heat setting equipment heats plastic films directly, causing the film to enter the high-temperature zone directly with a large temperature jump (from room temperature directly to the target temperature). The low-temperature material suddenly comes into contact with the high temperature, resulting in a significant temperature gradient between the surface and the core layer (the temperature difference can reach 30-50℃). The outer molecular chains soften rapidly, while the inner layer remains in a "glassy state." Therefore, the outer layer is prone to tearing due to excessive softening during stretching, leading to poor production safety. Utility Model Content

[0004] The purpose of this invention is to provide a plastic stretching and heat setting device to solve the above problems. By synergistic effect of the preheating zone and the heating zone, the temperature difference between the film surface and the core layer is reduced, the uniformity and safety of the stretching process are improved, the risk of film tearing is reduced, and the mechanical properties of the product and production efficiency are improved.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a plastic stretching and heat-setting device, comprising a support base, a plurality of first guide shafts rotatably connected to the support base, the same plastic film being wound on the plurality of first guide shafts, a heating structure provided on the support base, the heating structure comprising a connecting frame and infrared heating tubes, two connecting frames engaging on the support base, a plurality of infrared heating tubes mounted on the connecting frames, a screw rotatably connected to the connecting frames, a connecting rod threadedly connected to the screw, four stops fixedly connected to the support base, one side of the connecting rod simultaneously abutting against two of the stops, and a stretching structure provided on the support base.

[0006] Preferably, a rotating rod is fixedly connected to the screw, and the rotating rod is perpendicular to the screw.

[0007] Preferably, the overall cross-section of the connecting frame is U-shaped, and one end of the connecting frame extends to the outside of the support base.

[0008] Preferably, the overall cross-section of the stop block is L-shaped, and the screw is located in the middle of the connecting frame.

[0009] Preferably, three partitions are fixedly connected to the support base, and the three partitions are linearly and equidistantly distributed.

[0010] Preferably, the stretching structure includes a support plate and a first push roller. Two support plates are fixedly connected to the support base. The first push roller is rotatably connected to the support plate. A first motor is mounted on the support plate. The output shaft of the first motor is fixedly connected to one end of the first push roller. A movable plate is provided inside the support plate. Two guide posts are fixedly connected to the top of the movable plate. The two guide posts are slidably connected to the support plate. A second push roller is rotatably connected to the movable plate. A plastic film abuts between adjacent second push rollers and first push rollers. A second motor is mounted on the movable plate. One end of the second push roller is fixedly connected to the second motor.

[0011] Preferably, two electric push rods are installed on the support plate, and the bottom ends of the two electric push rods are fixedly connected to the moving plate.

[0012] Preferably, a second guide shaft is rotatably connected to the support base, and the second guide shaft abuts against the plastic film.

[0013] Preferably, the support base is equipped with multiple cooling fans, and the multiple cooling fans located on the same side of the support base are linearly and equidistantly distributed.

[0014] The beneficial effects of this invention are as follows: During use, the plastic film can be wound around multiple first guide shafts. These shafts rotate during film transport, guiding the film's movement. The film first passes through one connecting frame, where the infrared heating tubes are at a lower temperature, allowing for preheating. It then passes through another connecting frame, where the infrared heating tubes reach the target heating temperature, further heating the film. Therefore, through the synergistic effect of the preheating and heating zones, the temperature difference between the film surface and core is reduced, improving the uniformity of the stretching process. Safety is ensured, reducing the risk of film tearing, while improving product mechanical properties and production efficiency. Furthermore, as usage time increases, dust accumulates on the exterior of the infrared heating tubes, blocking infrared light and reducing heating efficiency. To address this, simply rotating the screw drives the connecting rod away from the stop block. Once a certain distance exists between the connecting rod and the stop block, the screw's rotation causes the connecting rod to rotate as well. When the connecting rod deviates from the stop block, the connecting frame can be pulled out from the support base, allowing multiple infrared heating tubes to be removed along with it. This facilitates cleaning of the dust on the exterior of the infrared heating tubes, ensuring heating efficiency and significantly improving maintenance efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0017] Figure 3 This is a schematic diagram of the connection structure between the connecting frame and the infrared heating tube of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the support plate and the first push roller of this utility model.

[0019] In the diagram: 1. Support base; 2. Partition plate; 3. Heating structure; 301. Connecting frame; 302. Infrared heating tube; 303. Screw; 304. Rotating rod; 305. Connecting rod; 306. Stop block; 4. Tensioning structure; 401. Support plate; 402. First push roller; 403. First motor; 404. Moving plate; 405. Second push roller; 406. Second motor; 407. Guide column; 408. Electric push rod; 5. First guide shaft; 6. Second guide shaft; 7. Cooling fan. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 As shown, a plastic stretching and heat-setting device includes a support base 1, on which a plurality of first guide shafts 5 are rotatably connected. The plurality of first guide shafts 5 are wound with the same plastic film. The support base 1 is provided with a heating structure 3, which includes a connecting frame 301 and an infrared heating tube 302. Two connecting frames 301 are engaged on the support base 1. The overall cross-section of the connecting frame 301 is U-shaped. One end of the connecting frame 301 extends to the outside of the support base 1. A plurality of infrared heating tubes 302 are installed on the connecting frame 301. A screw 303 is rotatably connected to the middle of the connecting frame 301. A connecting rod 305 is threadedly connected to the screw 303. Four stops 306 are fixedly connected to the support base 1. One side of the connecting rod 305 abuts against two of the stops 306 simultaneously. The support base 1 is provided with a stretching structure 4.

[0022] As a technical optimization of this utility model, a rotating rod 304 is fixedly connected to the screw 303. The rotating rod 304 is perpendicular to the screw 303, so the screw 303 can be easily rotated by holding the rotating rod 304.

[0023] As a technical optimization of this utility model, the overall cross-section of the stop block 306 is L-shaped, so the stop block 306 can block the connecting rod 305 during the movement of the connecting rod 305, thereby fixing the connecting frame 301.

[0024] As a technical optimization of this utility model, three partitions 2 are fixedly connected to the support base 1, so that the space inside the support base 1 can be divided by the three partitions 2, thereby forming a preheating zone and a heating zone. The three partitions 2 are linearly and equidistantly distributed.

[0025] As a technical optimization of this utility model, the stretching structure 4 includes a support plate 401 and a first pushing roller 402. Two support plates 401 are fixedly connected to the support base 1. The first pushing roller 402 is rotatably connected to the support plate 401. A first motor 403 is mounted on the support plate 401. The output shaft of the first motor 403 is fixedly connected to one end of the first pushing roller 402. A movable plate 404 is provided inside the support plate 401, so the first pushing roller 402 can be driven to rotate by the first motor 403. The top end of the movable plate 404 is fixed. Two guide posts 407 are fixedly connected, and the two guide posts 407 are slidably connected to the support plate 401. The two guide posts 407 can guide the movement of the moving plate 404 during its movement. A second push roller 405 is rotatably connected to the moving plate 404. A plastic film abuts between the adjacent second push roller 405 and the first push roller 402. A second motor 406 is installed on the moving plate 404. One end of the second push roller 405 is fixedly connected to the second motor 406, so the second push roller 405 can be driven to rotate by the second motor 406.

[0026] As a technical optimization of this utility model, two electric push rods 408 are installed on the support plate 401. The bottom ends of the two electric push rods 408 are fixedly connected to the moving plate 404. Therefore, the position of the second push roller 405 can be changed by the electric push rods 408, thereby adjusting the distance between the first push roller 402 and the second push roller 405. This facilitates the pushing of plastic films of different thicknesses and improves the flexibility of use.

[0027] As a technical optimization of this utility model, a second guide shaft 6 is rotatably connected to the support base 1. The second guide shaft 6 abuts against the plastic film, and the plastic film can be guided by the second guide shaft 6.

[0028] As a technical optimization of this utility model, multiple cooling fans 7 are installed on the support base 1, so the cooling speed of the plastic film can be improved by the cooling fans 7. The multiple cooling fans 7 located on the same side of the support base 1 are linearly and equidistantly distributed, and the heat dissipation effect can be further improved by setting multiple cooling fans 7.

[0029] In use, the plastic film is wound around multiple first guide shafts 5. During the conveying of the plastic film, the multiple first guide shafts 5 rotate, thereby guiding the movement of the plastic film. The plastic film first passes through one of the connecting frames 301, where the multiple infrared heating tubes 302 have a lower temperature, thus preheating the plastic film as it passes through. It then passes through another connecting frame 301, where the multiple infrared heating tubes 302 have the target temperature for heating the plastic film, thus achieving further heating. Therefore, through the synergistic effect of the preheating zone and the heating zone, the surface temperature of the film is reduced. The temperature difference between the inner and outer layers improves the uniformity and safety of the stretching process, reduces the risk of film tearing, and enhances the product's mechanical properties and production efficiency. Furthermore, as the infrared heating tube 302 is used, dust accumulates on its exterior, blocking infrared light and reducing heating efficiency. To address this, simply rotate the screw 303 using the hand-held rotating rod 304. The screw 303's rotation drives the connecting rod 305 away from the stop block 306. Once a certain distance exists between the connecting rod 305 and the stop block 306, the screw 303's rotation will cause the connecting rod 305 to rotate as well. When the connecting rod 305 rotates to the point where it deviates from the stop block 306, the connecting frame 301 can be pulled out from the support base 1. Multiple infrared heating tubes 30... 2. The infrared heating tube 302 will be pulled out along with the connecting frame 301, making it easier to clean the dust on the outside of the infrared heating tube 302, ensuring the heating effect of the infrared heating tube 302, and effectively improving the efficiency of the maintenance of the infrared heating tube 302. The plastic film that passes through the other connecting frame 301 will enter the interior of one of the support plates 401. Under the action of the synchronous and opposite rotation of one of the first push rollers 402 and one of the second push rollers 405, the plastic film will be pushed. Since the rotation speed of the other first push roller 402 and the other second push roller 405 is greater than that of the first push roller 402 and one of the second push rollers 405, the plastic film will be stretched as it passes between the two support plates 401, thus... The system achieves the stretching and shaping of the plastic film. After stretching, the plastic film can be cooled by multiple cooling fans 7 during the conveying process, thereby accelerating the cooling of the plastic film and facilitating subsequent processing. Simultaneously activating two electric push rods 408 can drive the moving plate 404 to move. During the movement of the moving plate 404, two guide posts 407 slide on the support plate 401, thereby guiding the movement of the moving plate 404. The movement of the moving plate 404 will drive the second push roller 405 to move, thereby adjusting the distance between the first push roller 402 and the second push roller 405. Therefore, it is convenient to push plastic films of different thicknesses, thus effectively improving the flexibility of use.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plastic stretching and heat setting device, comprising a support base (1), characterized in that: The support base (1) is rotatably connected to a plurality of first guide shafts (5), and the same plastic film is wound on the plurality of first guide shafts (5). The support base (1) is provided with a heating structure (3), which includes a connecting frame (301) and an infrared heating tube (302). Two connecting frames (301) are engaged on the support base (1). A plurality of infrared heating tubes (302) are installed on the connecting frame (301). A screw (303) is rotatably connected to the connecting frame (301). A connecting rod (305) is threadedly connected to the screw (303). Four stops (306) are fixedly connected to the support base (1). One side of the connecting rod (305) simultaneously abuts against two of the stops (306). The support base (1) is provided with a tensioning structure (4).

2. The plastic stretching and heat setting device according to claim 1, characterized in that: A rotating rod (304) is fixedly connected to the screw (303), and the rotating rod (304) is perpendicular to the screw (303).

3. The plastic stretching and heat setting device according to claim 1, characterized in that: The overall cross-section of the connecting frame (301) is U-shaped, and one end of the connecting frame (301) extends to the outside of the support base (1).

4. The plastic stretching and heat setting device according to claim 1, characterized in that: The block (306) has an L-shaped cross-section, and the screw (303) is located in the middle of the connecting frame (301).

5. A plastic stretch thermal setting device as claimed in claim 1, wherein: Three partitions (2) are fixedly connected to the support base (1), and the three partitions (2) are linearly and equidistantly distributed.

6. A plastic stretch thermal setting device according to claim 1, wherein: The stretching structure (4) includes a support plate (401) and a first push roller (402). Two support plates (401) are fixedly connected to the support base (1). The first push roller (402) is rotatably connected to the support plate (401). A first motor (403) is installed on the support plate (401). The output shaft of the first motor (403) is fixedly connected to one end of the first push roller (402). A movable plate (404) is provided inside the support plate (401). Two guide posts (407) are fixedly connected to the top of the movable plate (404). The two guide posts (407) are slidably connected to the support plate (401). A second push roller (405) is rotatably connected to the movable plate (404). A plastic film abuts between the adjacent second push roller (405) and the first push roller (402). A second motor (406) is installed on the movable plate (404). One end of the second push roller (405) is fixedly connected to the second motor (406).

7. A plastic stretch thermal setting device according to claim 6, wherein: Two electric push rods (408) are installed on the support plate (401), and the bottom ends of the two electric push rods (408) are fixedly connected to the moving plate (404).

8. A plastic stretch thermal setting device according to claim 1, wherein: The support base (1) is rotatably connected to a second guide shaft (6), which abuts against the plastic film.

9. A plastic stretch thermal setting device as defined in claim 1, wherein: Multiple cooling fans (7) are installed on the support base (1), and the multiple cooling fans (7) located on the same side of the support base (1) are linearly and equidistantly distributed.

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