Plastic sheet production line leveling structure

Abstract

The utility model relates to the technical field of plastic sheet production, in particular to a leveling structure of a plastic sheet production line. According to the technical scheme, the device comprises a base, a leveling seat, a preheating seat, a cold water tank and a cold water pump are fixedly installed on the upper surface of the base, stand columns are connected to the positions, close to the four corners, of the upper surface of the leveling seat, a top plate is connected to the tail ends of the stand columns, a hydraulic cylinder is installed on the upper surface of the top plate, and a lifting plate is connected to the tail end of an output shaft of the hydraulic cylinder; a hot pressing plate is installed on the lower surface of the lifting plate, a sliding groove is formed in the upper surface of the leveling base, a cooling plate is arranged in the sliding groove, and a cooling cavity is formed in the cooling plate. According to the utility model, the plastic sheet can be quickly and uniformly cooled and shaped after being hot-pressed and leveled so as to prevent edge warping and curling, and meanwhile, heat in the hot-pressing and leveling process of the plastic sheet can be recycled and used as heat for preheating the plastic sheet to be leveled, so that the energy consumption is saved.

Description

Technical Field

[0001] This utility model relates to the field of plastic sheet production technology, specifically a leveling structure for a plastic sheet production line. Background Technology

[0002] Plastic sheets refer to materials used in the production of disposable plastic cups, plates, bowls, dishes, boxes and other thermoformed products. They are widely used in packaging for food, vegetables, fruits, beverages, dairy products, industrial parts and other fields.

[0003] In the current production process of plastic sheets, a leveling structure is required to eliminate wrinkles and unevenness on the surface of the plastic sheets. In the leveling process, hot pressing is usually used. However, after hot pressing, the plastic sheets need to be cooled quickly and evenly to prevent curling and edge warping during the cooling process. To address this, we propose a leveling structure for plastic sheet production lines. Utility Model Content

[0004] The purpose of this utility model is to provide a leveling structure for a plastic sheet production line, which can quickly and evenly cool and shape the plastic sheet after hot pressing and leveling to prevent edge curling and warping. At the same time, it can recover and utilize the heat generated during the hot pressing and leveling process as heat for preheating the plastic sheet to be leveled, thus saving energy and solving the problem of warping and edge curling caused by uneven cooling after hot pressing and leveling of plastic sheets.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leveling structure for a plastic sheet production line, comprising a base, a leveling seat, a preheating seat, a cold water tank, and a cold water pump fixedly installed on the upper surface of the base, columns connected to the upper surface of the leveling seat near the four corners, a top plate connected to the end of each column, a hydraulic cylinder installed on the upper surface of the top plate, a lifting plate connected to the end of the output shaft of the hydraulic cylinder, a hot pressing plate installed on the lower surface of the lifting plate, a sliding groove provided on the upper surface of the leveling seat, a cooling plate provided inside the sliding groove, a cooling chamber provided inside the cooling plate, a preheating chamber provided inside the preheating seat, a connecting pipe and a return pipe connected to both sides of the preheating seat, and the ends of the connecting pipe and the cold water pump output pipe connected to the inner side of the cooling plate near the front and rear surfaces, respectively.

[0006] Preferably, the end of the cold water pump inlet pipe is connected to the outer surface of the cold water tank near the lower surface, and the end of the return pipe is connected to the upper surface of the cold water tank.

[0007] Preferably, the upper surface of the preheating seat is provided with a limiting groove.

[0008] Preferably, the upper surface of the lifting plate is provided with through holes near the four corners, and the four columns pass through the four through holes respectively.

[0009] Preferably, a return spring is fitted onto the outer surface of each of the four columns at a position below the lifting plate.

[0010] Preferably, slots are provided on the lower surface of the cooling plate near the four corners, and lifting springs are connected to the top of the inner walls of the four slots, with insert rods connected to the ends of the four lifting springs.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, by setting up a base, leveling seat, cooling plate, cooling chamber, column, top plate, hydraulic cylinder, hot press plate, cold water pump, connecting pipe, return pipe, preheating seat, and preheating chamber, achieves rapid and uniform cooling and shaping of plastic sheets after hot pressing and leveling, preventing edge warping and curling. Simultaneously, it can recover and utilize the heat generated during the hot pressing and leveling process, using it as preheating heat for the plastic sheets to be leveled, thus saving energy. The plastic sheet is placed on the cooling plate, and the hydraulic cylinder drives the lifting plate and hot press plate to descend. The hot press plate heats and presses the plastic sheet on the cooling plate to eliminate wrinkles and unevenness on the surface of the plastic sheet, resulting in a smooth surface. After hot pressing and leveling, the cold water pump delivers cooling water into the cooling chamber, allowing the plastic sheet to cool and shape evenly and quickly. The heated cooling water enters the preheating chamber and preheats the plastic sheet to be leveled on the upper surface of the preheating seat.

[0013] 2. This utility model achieves the effect of facilitating the removal of the leveled plastic sheet inside the slide by setting up the insertion rod, slot and lifting spring. When the hot press plate applies pressure to the plastic sheet on the cooling plate, the lifting spring is compressed and the cooling plate descends at the same time. When the plastic sheet is leveled and the hot press plate removes the pressure on the cooling plate, the compressed lifting spring drives the cooling plate to rise, so as to facilitate the removal of the leveled plastic sheet. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 3 This is a partial main sectional view of the preheating seat of this utility model;

[0017] Figure 4 This is a partial main sectional view of the leveling seat of this utility model.

[0018] Reference numerals: 1. Base; 2. Leveling seat; 3. Return spring; 4. Column; 5. Lifting plate; 6. Through hole; 7. Top plate; 8. Hydraulic cylinder; 9. Connecting pipe; 10. Return pipe; 11. Cold water tank; 12. Cold water pump; 13. Preheating seat; 14. Hot press plate; 15. Limiting groove; 16. Preheating chamber; 17. Slide groove; 18. Insert rod; 19. Slot; 20. Lifting spring; 21. Cooling plate; 22. Cooling chamber. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figures 1-4 As shown, the present invention proposes a leveling structure for a plastic sheet production line, including a base 1. A leveling seat 2, a preheating seat 13, a cold water tank 11, and a cold water pump 12 are fixedly installed on the upper surface of the base 1. Columns 4 are connected to the upper surface of the leveling seat 2 near the four corners. A top plate 7 is connected to the end of each column 4. A hydraulic cylinder 8 is installed on the upper surface of the top plate 7. A lifting plate 5 is connected to the end of the output shaft of the hydraulic cylinder 8. Through holes 6 are provided on the upper surface of the lifting plate 5 near the four corners, and the four columns 4 pass through the four through holes 6 respectively. A return spring 3 is sleeved on the outer surface of each of the four columns 4 below the lifting plate 5. The return spring 3 is a helical spring. When the lifting plate 5 descends, the return spring 3 is compressed. When the lifting plate 5 rises and returns to its original position, the compressed return spring 3 is released, which facilitates the rising and returning of the lifting plate 5. A hot press plate 14 is installed on the lower surface of the lifting plate 5.

[0022] The upper surface of the leveling seat 2 is provided with a sliding groove 17, and a cooling plate 21 is provided inside the sliding groove 17. A cooling chamber 22 is provided inside the cooling plate 21. A preheating seat 13 is provided with a preheating chamber 16. A limiting groove 15 is provided on the upper surface of the preheating seat 13. The bottom of the plastic sheet is placed inside the limiting groove 15, which serves to limit the placement of the plastic sheet. A connecting pipe 9 and a return pipe 10 are respectively connected to both sides of the preheating seat 13. The ends of the connecting pipe 9 and the output pipe of the cold water pump 12 are respectively connected to the inner side of the cooling plate 21 near the front and rear surfaces. The end of the input pipe of the cold water pump 12 is connected to the outer surface of the cold water tank 11 near the lower surface. The end of the return pipe 10 is connected to the upper surface of the cold water tank 11. The water inside the preheating chamber 16 flows back to the cold water tank 11 through the return pipe 10.

[0023] In use, the plastic sheet is placed on the cooling plate 21. The hydraulic cylinder 8 drives the lifting plate 5 and the hot pressing plate 14 to descend. The hot pressing plate 14 heats and presses the plastic sheet on the cooling plate 21 to eliminate wrinkles and unevenness on the surface of the plastic sheet, thereby making the surface of the plastic sheet flat. After the hot pressing and flattening is completed, the cold water pump 12 delivers cooling water into the cooling chamber 22, so that the plastic sheet is cooled and shaped evenly and quickly to prevent the plastic sheet from curling and warping during the cooling and shaping process. The heated cooling water enters the preheating chamber 16 and preheats the plastic sheet to be flattened on the upper surface of the preheating seat 13.

[0024] Example 2

[0025] like Figure 1 , Figure 3 and Figure 4 As shown, the leveling structure for a plastic sheet production line proposed in this utility model, compared with Embodiment 1, further includes slots 19 at the four corners of the lower surface of the cooling plate 21, and lifting springs 20 connected to the top of the inner walls of the four slots 19. The lifting springs 20 are helical springs, and the ends of the four lifting springs 20 are connected to insert rods 18.

[0026] In this embodiment, when the hot press plate 14 applies pressure to the plastic sheet on the cooling plate 21, the lifting spring 20 is compressed, and the cooling plate 21 descends. When the plastic sheet is leveled and the hot press plate 14 removes pressure from the cooling plate 21, the compressed lifting spring 20 drives the cooling plate 21 to rise, so that the leveled plastic sheet can be removed.

[0027] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A leveling structure for a plastic sheet production line, comprising a base (1), characterized in that: The base (1) is fixedly mounted with a leveling seat (2), a preheating seat (13), a cold water tank (11), and a cold water pump (12) on its upper surface. The leveling seat (2) has columns (4) connected to its upper surface near the four corners. A top plate (7) is connected to the end of each column (4). A hydraulic cylinder (8) is mounted on the upper surface of the top plate (7). A lifting plate (5) is connected to the end of the output shaft of the hydraulic cylinder (8). A hot press plate (14) is mounted on the lower surface of the lifting plate (5). The leveling seat... The upper surface of the seat (2) is provided with a sliding groove (17), the sliding groove (17) is provided with a cooling plate (21), the cooling plate (21) is provided with a cooling chamber (22), the preheating seat (13) is provided with a preheating chamber (16), the two sides of the preheating seat (13) are respectively connected to a connecting pipe (9) and a return pipe (10), the ends of the connecting pipe (9) and the output pipe of the cold water pump (12) are respectively connected to the inner side of the cooling plate (21) near the front surface and the rear surface.

2. The leveling structure for a plastic sheet production line according to claim 1, characterized in that: The end of the input pipe of the cold water pump (12) is connected to the outer surface of the cold water tank (11) near the lower surface, and the end of the return pipe (10) is connected to the upper surface of the cold water tank (11).

3. The leveling structure for a plastic sheet production line according to claim 1, characterized in that: The upper surface of the preheating seat (13) is provided with a limiting groove (15).

4. The leveling structure for a plastic sheet production line according to claim 1, characterized in that: The lifting plate (5) has through holes (6) near the four corners on its upper surface, and the four columns (4) pass through the four through holes (6) respectively.

5. The leveling structure for a plastic sheet production line according to claim 4, characterized in that: Each of the four columns (4) has a return spring (3) fitted on its outer surface below the lifting plate (5).

6. The leveling structure for a plastic sheet production line according to claim 1, characterized in that: The lower surface of the cooling plate (21) is provided with slots (19) near the four corners. The top of the inner wall of each of the four slots (19) is connected to a lifting spring (20), and the end of each of the four lifting springs (20) is connected to a plug (18).

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