Polyethylene foam board hot press forming equipment
By using an electric push rod and motor in conjunction with a moving block and spring in a polyethylene foam board thermoforming equipment, the problem of film tension adjustment is solved, ensuring that the film remains horizontally tensioned during the thermoforming process, avoiding wrinkles or shrinkage, and improving the molding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG HONGRUN RUBBER & PLASTIC PRODUCTS CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-21
AI Technical Summary
Existing polyethylene foam board hot pressing equipment has problems with film tension adjustment, which causes wrinkles or shrinkage of the film during hot pressing, affecting the molding quality.
The system employs an electric actuator and motor, with the movement block and spring working together to provide appropriate tension, ensuring the film remains horizontally taut and preventing wrinkles or shrinkage.
This method enables the film to maintain horizontal tension during hot pressing, avoiding wrinkles or shrinkage and improving molding quality.
Smart Images
Figure CN224528017U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot pressing molding, and in particular to a hot pressing molding equipment for polyethylene foam plastic boards. Background Technology
[0002] Polyethylene foam is made primarily of polyethylene resin, with added foaming agents, crosslinking agents, and other additives. It is a very important cushioning material. By hot-pressing a film onto the surface of polyethylene foam, its service life can be increased and its application range expanded.
[0003] Chinese utility model patent CN202421359169.1 discloses a polyethylene hot-pressing molding equipment, including a worktable. A first fixing plate and a second fixing plate are fixedly connected to both sides of the top of the worktable, and a crossbeam is fixedly connected between the first fixing plate and the second fixing plate. This utility model's technical solution allows for the installation of polyethylene foam boards via an mounting slot on a lifting platform. An electric push rod can push the lifting platform upwards until the polyethylene foam board abuts against a polyethylene film. After hot pressing, an electric heating wire melts the polyethylene film, allowing it to completely cover the polyethylene foam board. At this point, a rectangular hole is created at the melted point of the polyethylene film, preventing it from breaking. Then, with the cooperation of a first winding roller and a second winding roller, the position of the rectangular hole is moved, and the polyethylene film with the hole is wound up. This operation can be repeated subsequently, making it convenient and practical.
[0004] However, when the aforementioned polyethylene hot pressing equipment is in use, the film hangs naturally with an arc-shaped structure in the middle area. This causes the area of the film to be hot-pressed to be larger than the actual required area during hot pressing, resulting in wrinkles after the film is attached to the polyethylene foam board. If a motor is used to tighten it, the film will be in a taut and deformed state, and the area of the film after hot pressing will be smaller than the actual required area, resulting in film shrinkage. Utility Model Content
[0005] In view of this, the present invention provides a hot pressing molding equipment for polyethylene foam plastic boards. The main technical problem to be solved is: to provide a hot pressing molding equipment that can adjust the film tension during the hot pressing process of polyethylene foam plastic boards.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a polyethylene foam board hot pressing molding equipment, comprising a base, a top frame fixedly connected to the top of the base, a through groove on the upper surface of the base, an electric push rod fixedly connected to the inner bottom of the base, a push plate fixedly connected to the top of the electric push rod, the push plate being located inside the through groove, a heating groove on the lower surface of the top frame, a heating plate fixedly connected to the inside of the heating groove, a heater fixedly connected to the inside of the heating groove, the heater being located above the heating plate, winding grooves on both the left and right sides of the top frame, a motor fixedly connected to the outer surface of the top frame, a rotating shaft fixedly connected to the output end of the motor, a film roll mounted on the outer surface of the rotating shaft, the film roll being located inside the winding groove.
[0007] By adopting the above technical solution, when using it, the polyethylene foam board to be processed is placed on the upper surface of the pusher plate. Then, the motor is started to move the complete film directly above the pusher plate. Then, the electric push rod is started to control the pusher plate to move upward, so that the polyethylene foam board can first contact the film and then reach the bottom of the heating plate. Under the action of the heater, the film can be hot-pressed onto the upper surface of the polyethylene foam board.
[0008] As a further description of the above technical solution:
[0009] The film on one of the film rolls passes under the top frame to reach the other film roll.
[0010] By adopting the above technical solution, it is easy to continuously deliver the complete film to the top of the pusher plate.
[0011] As a further description of the above technical solution:
[0012] The through slot is located directly below the heating slot, and the push plate is located directly below the heating plate.
[0013] By adopting the above technical solution, the upward movement of the pusher plate can push the polyethylene foam board to the heating plate, which facilitates the hot pressing of the film onto the polyethylene foam board.
[0014] As a further description of the above technical solution:
[0015] A heating wire is fixedly connected to the lower surface of the top frame. The heating wire is located outside the heating tank and has a rectangular structure.
[0016] By adopting the above technical solution, the film can be melted by the heating wire, separating the film hot-pressed onto the polyethylene foam board from the film roll.
[0017] As a further description of the above technical solution:
[0018] The lower surface of the top frame is provided with two expansion grooves, which are located on the left and right sides of the heating tank, respectively.
[0019] By adopting the above technical solution, the installation of the movable block is facilitated.
[0020] As a further description of the above technical solution:
[0021] A spring is fixedly connected inside the telescopic groove, and a movable block is fixedly connected to the bottom of the spring. The lower surface of the movable block is in contact with the outer surface of the film.
[0022] By adopting the above technical solution, the moving block can move up and down in the telescopic groove. The moving block and the spring can provide appropriate tension to the film, so that the film can be kept in a horizontal tension state and the film will not wrinkle or shrink during hot pressing.
[0023] By employing the above technical solution, the polyethylene foam board hot pressing molding equipment of this utility model has at least the following beneficial effects:
[0024] 1. Compared with the prior art, the polyethylene foam board hot pressing molding equipment places the polyethylene foam board to be processed on the upper surface of the push plate, then starts the motor to move the complete film directly above the push plate, and then starts the electric push rod to control the push plate to move upward, so that the polyethylene foam board can first contact the film and then reach the bottom of the heating plate. Under the action of the heater, the film can be hot-pressed onto the upper surface of the polyethylene foam board.
[0025] 2. Compared with the prior art, this polyethylene foam board hot pressing molding equipment can provide appropriate tension to the film through the cooperation of the moving block and the spring, so that the film can be kept in a horizontal tension state and the film will not wrinkle or shrink during hot pressing molding. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the internal structure from a first-view perspective of the present invention.
[0028] Figure 3 The present utility model proposes Figure 2 Enlarged view of the structure at point A in the middle;
[0029] Figure 4 This is a schematic diagram of the internal structure from a second perspective proposed in this utility model;
[0030] Figure 5This is a schematic diagram of the top frame structure proposed in this utility model.
[0031] Legend:
[0032] 1. Base; 2. Top frame; 3. Through slot; 4. Electric push rod; 5. Push plate; 6. Heating slot; 7. Heating plate; 8. Heater; 9. Telescopic slot; 10. Spring; 11. Moving block; 12. Heating wire; 13. Rewinding slot; 14. Motor; 15. Shaft; 16. Film roll. Detailed Implementation
[0033] Reference Figure 1-5 This utility model provides a polyethylene foam board hot pressing molding equipment, including a base 1, a top frame 2 fixedly connected to the top of the base 1, a through groove 3 on the upper surface of the base 1, an electric push rod 4 fixedly connected to the inner bottom of the base 1, a push plate 5 fixedly connected to the top of the electric push rod 4, the push plate 5 moving up and down under the action of the electric push rod 4, and the polyethylene foam to be processed is placed on the push plate 5 for processing. The push plate 5 is located inside the through groove 3. A heating groove 6 is opened on the lower surface of the top frame 2, and a heating groove 6 is fixedly connected inside the heating groove 6. Heating plate 7 and heating groove 6 are internally connected to heater 8. Heater 8 contains heating wires and generates heat when powered on. Heater 8 is located above heating plate 7. Rewinding grooves 13 are provided on both the left and right sides of top frame 2. Motor 14 is fixedly connected to the outer surface of top frame 2. A rotating shaft 15 is fixedly connected to the output end of motor 14. A film roll 16 is mounted on the outer surface of rotating shaft 15 and is located inside the rewinding groove 13. In use, the polyethylene foam board to be processed is placed on the upper surface of push plate 5, and then motor 14 is started to complete the process. The entire film is moved directly above the push plate 5. Then, the electric push rod 4 is activated to control the push plate 5 to move upward, so that the polyethylene foam board can first contact the film and then reach the bottom of the heating plate 7. Under the action of the heater 8, the film can be hot-pressed onto the upper surface of the polyethylene foam board. The lower surface of the top frame 2 is fixedly connected to the heating wire 12, which is located outside the heating tank 6. The heating wire 12 has a rectangular structure and can melt the film, thus separating the film hot-pressed onto the polyethylene foam board from the film roll 16. The film is separated, and the lower surface of the top frame 2 is provided with two expansion grooves 9. The two expansion grooves 9 are located on the left and right sides of the heating tank 6, respectively. A spring 10 is fixedly connected inside the expansion groove 9, and a moving block 11 is fixedly connected to the bottom of the spring 10. The lower surface of the moving block 11 is in contact with the outer surface of the film. The moving block 11 can move up and down in the expansion groove 9. The moving block 11 and the spring 10 cooperate to provide appropriate tension to the film, so that the film can be kept in a horizontal tension state and the film will not wrinkle or shrink during hot pressing.
[0034] The film on one film roll 16 passes under the top frame 2 to reach another film roll 16, which facilitates the continuous delivery of complete films to the top of the push plate 5. The through groove 3 is located directly below the heating groove 6, and the push plate 5 is located directly below the heating plate 7. The upward movement of the push plate 5 can push the polyethylene foam board to the heating plate 7, which facilitates the hot pressing of the film onto the polyethylene foam board.
[0035] Working principle: When in use, place the polyethylene foam board to be processed on the upper surface of the push plate 5, then start the motor 14 to move the complete film directly above the push plate 5. Then start the electric push rod 4 to control the push plate 5 to move upward, so that the polyethylene foam board can first contact the film and then reach the bottom of the heating plate 7. Under the action of the heater 8, the film can be hot-pressed onto the upper surface of the polyethylene foam board. The moving block 11 and the spring 10 cooperate to provide appropriate tension to the film, so that the film can be kept in a horizontal tension state and no wrinkles or shrinkage will occur during hot pressing.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A thermoforming device for polyethylene foam boards, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a top frame (2). A through groove (3) is opened on the upper surface of the base (1). An electric push rod (4) is fixedly connected to the bottom of the base (1). A push plate (5) is fixedly connected to the top of the electric push rod (4). The push plate (5) is located inside the through groove (3). A heating groove (6) is opened on the lower surface of the top frame (2). A heating plate (7) is fixedly connected inside the heating groove (6). A heater (8) is fixedly connected inside the heating groove (6). The heater (8) is located above the heating plate (7). A winding groove (13) is opened on both the left and right sides of the top frame (2). A motor (14) is fixedly connected to the outer surface of the top frame (2). A rotating shaft (15) is fixedly connected to the output end of the motor (14). A film roll (16) is installed on the outer surface of the rotating shaft (15). The film roll (16) is located inside the winding groove (13).
2. The polyethylene foam board hot pressing molding equipment according to claim 1, characterized in that: The film on one of the film rolls (16) passes under the top frame (2) to reach another film roll (16).
3. The polyethylene foam board hot pressing molding equipment according to claim 1, characterized in that: The through groove (3) is located directly below the heating groove (6), and the push plate (5) is located directly below the heating plate (7).
4. The polyethylene foam board hot pressing molding equipment according to claim 1, characterized in that: A heating wire (12) is fixedly connected to the lower surface of the top frame (2). The heating wire (12) is located outside the heating groove (6) and has a rectangular structure.
5. The polyethylene foam board hot pressing molding equipment according to claim 1, characterized in that: The lower surface of the top frame (2) is provided with a telescopic groove (9), and there are two telescopic grooves (9), which are located on the left and right sides of the heating groove (6) respectively.
6. The polyethylene foam board hot pressing molding equipment according to claim 5, characterized in that: A spring (10) is fixedly connected inside the telescopic groove (9), and a moving block (11) is fixedly connected to the bottom of the spring (10). The lower surface of the moving block (11) is in contact with the outer surface of the film.