Cooling equipment for PE film stretching

Abstract

The application relates to the technical field of PE film, and discloses a cooling equipment for PE film stretching, which comprises a cooling box, a group of wave-shaped guide rollers rotatably arranged on the inner wall of the cooling box, a group of comb-shaped air pipes fixedly arranged on the inner top wall and the inner bottom wall of the cooling box respectively, and a group of air nozzles fixedly arranged on one side of each group of comb-shaped air pipes respectively. The wave-shaped guide rollers are arranged in the cooling box, so that the film experiences a wave-shaped path during cooling, actively releases internal stress, reduces the generation of wrinkles and 'lotus border', and meanwhile, the comb-shaped air pipes and the air nozzles realize uniform distribution of air flow, avoid uneven edge shrinkage caused by local rapid cooling, and further refine the air flow through the S-shaped plates and the filter screen, reduce turbulent impact, optimize stress balance and air flow uniformity in the cooling process, effectively inhibit quality defects of the film caused by uneven cooling or stress concentration, and improve the flatness and size stability of the film.

Description

Technical Field

[0001] This application relates to the field of PE film technology, specifically a cooling device for stretching PE film. Background Technology

[0002] PE film, or polyethylene film, refers to film produced from PE granules. PE film has moisture resistance and low moisture permeability. Depending on the manufacturing method and control measures, polyethylene film (PE) can be made into products with different properties, such as low-density, medium-density, high-density polyethylene and cross-linked polyethylene. In order to ensure the quality of plastic film, the film needs to be heated during uniaxial stretching, and then cooled after stretching to prevent deformation.

[0003] Currently, PE film is cooled after stretching, which is generally done by air cooling. Airflow mechanisms are installed at both the top and bottom of the film. The blowing of the airflow may cause wrinkles or lotus-shaped edges to appear on the film, which in turn affects the quality of the film. Utility Model Content

[0004] The purpose of this application is to provide a cooling device for stretching PE film, which solves the problem mentioned in the background art that the cooling of PE film after stretching is generally carried out by air cooling, and airflow mechanisms are set at both the top and bottom of the film. The blowing of the airflow may cause wrinkles and lotus edges to appear on the film, which in turn leads to film quality problems.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This application provides a cooling device for stretching PE film, including a cooling box. A set of wave-shaped guide rollers are rotatably mounted on the inner wall of the cooling box. A set of comb-shaped air ducts are fixedly mounted on the inner top and bottom walls of the cooling box. A set of air nozzles is fixedly mounted on the side of each set of comb-shaped air ducts facing the guide rollers. A set of fixing frames are fixedly mounted on the inner walls of the cooling box above and below the guide rollers. A set of S-shaped plates is welded to the inner walls of each set of fixing frames. A set of filter screens is fixedly mounted on the inner walls of the two sets of fixing frames facing each other. A drive mechanism for driving the guide rollers is provided on the outer wall of the cooling box, and an air supply mechanism for supplying air to the comb-shaped air ducts is provided on the outer wall of the cooling box.

[0006] By adopting the above technical solution, a wave-shaped guide roller is set in the cooling box so that the film follows a wave path during cooling, actively releasing internal stress and reducing wrinkles and "lotus edges". At the same time, the comb-shaped air duct and air nozzle achieve uniform airflow distribution, avoiding uneven edge shrinkage caused by local rapid cooling. The S-shaped plate and filter further refine the airflow, reduce turbulent impact, optimize stress balance and airflow uniformity during cooling, effectively suppress quality defects caused by uneven cooling or stress concentration of the film, and improve the flatness and dimensional stability of the film.

[0007] Optionally, a set of through holes are provided on the outer walls of both sides of the cooling box, and a set of base blocks are fixedly installed on the outer wall of the cooling box on one side of each set of through holes. An auxiliary roller is rotatably installed on the inner wall of each set of base blocks.

[0008] By adopting the above technical solution, the cooling box can fix the two sets of base blocks respectively, and each set of base blocks can provide rotational support for the auxiliary roller. The auxiliary roller can cooperate with the through hole to facilitate the entry and exit of the film.

[0009] Optionally, a set of doors is hinged to the outer walls on both sides of the cooling box, and handles are welded to the outer walls of the two sets of doors.

[0010] By adopting the above technical solution, the cooling box can be shielded by the box door, while the handle makes it convenient for staff to open the box door.

[0011] Optionally, the air supply mechanism includes a cold air fan fixedly installed on the outer wall of the cooling box. The output pipe of the cold air fan is fixedly installed with two delivery pipes through a tee, and each delivery pipe is fixedly installed with a set of comb-shaped air ducts.

[0012] By adopting the above technical solution, the cooling box can fix the air cooler, and the air cooler can deliver cold air to the comb-shaped air duct with the help of the three-way valve.

[0013] Optionally, the drive mechanism includes multiple sets of driven pulleys rotatably mounted on the outer wall of the cooling box. The multiple sets of driven pulleys are respectively fixedly mounted with corresponding guide rollers, and a set of driven belt bodies are tensioned and sleeved on the outer wall of each set of driven pulleys.

[0014] By adopting the above technical solution, multiple sets of guide rollers can be rotated in conjunction with each other through the cooperation of multiple sets of driven belt bodies and corresponding driven belt pulleys.

[0015] Optionally, a drive motor is fixedly installed at the upper end of the cooling box, and a drive pulley is fixedly installed on the output shaft of the drive motor. A set of drive belt bodies is tensioned and sleeved on the outer wall of the drive pulley and one of the driven pulleys.

[0016] By adopting the above technical solution, the cooling box can fix the drive motor, and the drive motor drives the driven pulley to rotate in cooperation with the drive pulley and the drive belt body.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: The technical solution of this application sets up a wave-shaped guide roller in the cooling box, so that the film follows a wave path during cooling, actively releasing internal stress and reducing the generation of wrinkles and "lotus edges". At the same time, the comb-shaped air duct and the air nozzle achieve uniform airflow distribution, avoiding uneven edge shrinkage caused by local rapid cooling. The S-shaped plate and the filter screen further refine the airflow, reduce turbulence impact, optimize stress balance and airflow uniformity during the cooling process, effectively suppress quality defects caused by uneven cooling or stress concentration of the film, and improve the flatness and dimensional stability of the film. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an axial view schematic diagram of a cooling device for stretching PE film according to this application; Figure 2 This is a rear view schematic diagram of a cooling device for stretching PE film according to this application; Figure 3 This is a schematic axial view of a cooling device for stretching PE film according to this application; Figure 4 This is a schematic axial view of the fixed frame of a cooling device for stretching PE film according to this application.

[0019] In the diagram: 1. Cooling box; 2. Guide roller; 3. Comb-shaped air duct; 4. Air nozzle; 5. Fixing frame; 6. S-shaped plate; 7. Filter screen; 8. Through hole; 9. Base block; 10. Auxiliary roller; 11. Driven pulley; 12. Driven belt body; 13. Driven pulley; 14. Driven belt body; 15. Drive motor; 16. Air cooler; 17. T-joint; 18. Conveying pipe; 19. Box door; 20. Handle. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This application provides a technical solution: a cooling device for stretching PE film, including a cooling box 1. A set of wave-shaped guide rollers 2 are rotatably installed on the inner wall of the cooling box 1. A set of comb-shaped air ducts 3 are fixedly installed on the inner top wall and inner bottom wall of the cooling box 1, and a set of air nozzles 4 are fixedly installed on the side of each set of comb-shaped air ducts 3 facing the guide rollers 2. A set of fixing frames 5 are fixedly installed on the inner wall of the cooling box 1 above and below the guide rollers 2. A set of S-shaped plates 6 are welded to the inner wall of each set of fixing frames 5. A set of filter screens 7 are fixedly installed on the inner wall of the two sets of fixing frames 5 facing each other. A drive mechanism for driving the guide rollers 2 is provided on the outer wall of the cooling box 1, and an air supply mechanism for supplying air to the comb-shaped air ducts 3 is provided on the outer wall of the cooling box 1. In the technical solution of this application, by setting a wave-shaped guide roller 2 inside the cooling box 1, the film travels through a wave path during cooling, actively releasing internal stress and reducing wrinkles and "lotus edges". At the same time, the comb-shaped air duct 3 and the air nozzle 4 achieve uniform airflow distribution, avoiding uneven edge shrinkage caused by local rapid cooling. The S-shaped plate 6 and the filter screen 7 further refine the airflow, reduce turbulent impact, optimize stress balance and airflow uniformity during the cooling process, effectively suppress quality defects caused by uneven cooling or stress concentration of the film, and improve the flatness and dimensional stability of the film.

[0022] In the technical solution of this application, such as Figure 1 and Figure 2 As shown, the drive mechanism includes multiple sets of driven pulleys 11 rotatably mounted on the outer wall of the cooling box 1. The multiple sets of driven pulleys 11 are respectively fixedly mounted with corresponding guide rollers 2. A set of driven belt bodies 12 is tensioned and sleeved on the outer wall of each of the multiple sets of driven pulleys 11. The multiple sets of driven belt bodies 12 and the corresponding driven pulleys 11 cooperate to facilitate the linkage rotation of the multiple sets of guide rollers 2. A drive motor 15 is fixedly mounted on the upper end of the cooling box 1. A drive pulley 13 is fixedly mounted on the output shaft of the drive motor 15. A set of drive belt bodies 14 is tensioned and sleeved on the outer wall of the drive pulley 13 and one of the driven pulleys 11. The cooling box 1 can fix the drive motor 15, and the drive motor 15 drives the driven pulleys 11 to rotate under the cooperation of the drive pulley 13 and the drive belt bodies 14.

[0023] In the technical solution of this application, such as Figure 2 and Figure 3 As shown, the air supply mechanism includes a cooler 16 fixedly installed on the outer wall of the cooling box 1. The output pipe of the cooler 16 is fixedly installed with two delivery pipes 18 through a tee 17. Each delivery pipe 18 is fixedly installed with a set of comb-shaped air ducts 3. The cooling box 1 can fix the cooler 16, and the cooler 16 can deliver cold air to the comb-shaped air ducts 3 through the delivery pipes 18 and the comb-shaped air ducts 3 with the help of the tee 17.

[0024] In the technical solution of this application, such as Figure 2 and Figure 3 As shown, a set of through holes 8 are respectively opened on the outer walls of both sides of the cooling box 1. A set of base blocks 9 are fixedly installed on the outer wall of the cooling box 1 on one side of each set of through holes 8. An auxiliary roller 10 is rotatably installed on the inner wall of each set of base blocks 9. The cooling box 1 can fix the two sets of base blocks 9 respectively, and each set of base blocks 9 can provide rotational support for the auxiliary roller 10. The auxiliary roller 10 can cooperate with the through holes 8 to facilitate the entry and exit of the film. A set of box doors 19 are hinged to the outer walls of both sides of the cooling box 1. Handles 20 are welded to the outer walls of the two sets of box doors 19 respectively. The box doors 19 can shield the cooling box 1, and the handles 20 can make it convenient for the staff to open the box doors 19.

[0025] In use, the operator inserts the film into the cooling box 1 through the perforation 8. The auxiliary roller 10 guides and supports the film, allowing it to enter the box smoothly. The drive motor 15 drives the active pulley 13 and the active belt body 14 to rotate one of the driven pulleys 11. With the linkage of multiple sets of driven belt bodies 12 and corresponding driven pulleys 11, all the guide rollers 2 arranged in a wave shape rotate synchronously, causing the film to move along the wave path and actively release internal stress. At the same time, the air supply mechanism's cold air blower 16 generates cold air, which is delivered to the comb-shaped air duct 3 through the output pipe, tee 17, and conveying pipe 18. Then, the air is evenly sprayed onto the film surface in a fan or cone shape by the air nozzle 4. The S-shaped plate 6 and the filter screen 7 further refine the airflow, reduce turbulent impact, and cool the film evenly, avoiding uneven edge shrinkage caused by local rapid cooling. Finally, the cooled and shaped film is output through the perforation 8 on the other side, effectively improving the flatness and dimensional stability of the film.

Claims

1. A cooling device for stretching PE film, characterized in that: The cooling box (1) includes a set of guide rollers (2) arranged in a wave shape, which are rotatably installed on the inner wall of the cooling box (1). A set of comb-shaped air ducts (3) are fixedly installed on the inner top wall and inner bottom wall of the cooling box (1). A set of air nozzles (4) are fixedly installed on the side of each set of comb-shaped air ducts (3) facing the guide rollers (2). A set of fixing frames (5) are fixedly installed on the inner wall of the cooling box (1) above and below the guide rollers (2). A set of S-shaped plates (6) are welded on the inner wall of each set of fixing frames (5). A set of filter screens (7) are fixedly installed on the inner wall of the two sets of fixing frames (5) facing each other. A driving mechanism for driving the guide rollers (2) is provided on the outer wall of the cooling box (1). An air supply mechanism for supplying air to the comb-shaped air ducts (3) is provided on the outer wall of the cooling box (1).

2. The cooling device for stretching PE film according to claim 1, characterized in that, The outer walls on both sides of the cooling box (1) are provided with a set of through holes (8). A set of base blocks (9) are fixedly installed on the outer wall of the cooling box (1) on one side of each set of through holes (8). An auxiliary roller (10) is rotatably installed on the inner wall of each set of base blocks (9).

3. The cooling device for stretching PE film according to claim 1, characterized in that, A set of doors (19) are hinged to the outer walls on both sides of the cooling box (1), and handles (20) are welded to the outer walls of the two sets of doors (19).

4. The cooling device for stretching PE film according to claim 1, characterized in that, The air supply mechanism includes a cold air fan (16) fixedly installed on the outer wall of the cooling box (1). The output pipe of the cold air fan (16) is fixedly installed with two delivery pipes (18) through a tee (17). Each delivery pipe (18) is fixedly installed with a set of comb-shaped air ducts (3).

5. A cooling device for stretching PE film according to claim 1, characterized in that, The drive mechanism includes multiple sets of driven pulleys (11) rotatably mounted on the outer wall of the cooling box (1). The multiple sets of driven pulleys (11) are fixedly mounted with corresponding guide rollers (2). The outer walls of the multiple sets of driven pulleys (11) are tensioned and fitted with a set of driven belt bodies (12).

6. A cooling device for stretching PE film according to claim 5, characterized in that, A drive motor (15) is fixedly installed at the upper end of the cooling box (1). A drive pulley (13) is fixedly installed on the output shaft of the drive motor (15). A set of drive belt bodies (14) are tensioned and sleeved on the outer wall of the drive pulley (13) and one of the driven pulleys (11).

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