Secondary foaming device for PET (Polyethylene Terephthalate) foamed sheet

Abstract

The utility model belongs to the field of PET foaming sheet production equipment, and particularly relates to a PET foaming sheet secondary foaming device which comprises a frame body and a traction system, a first support, a second support, a third support and a fourth support are sequentially and fixedly connected to the frame body from left to right, a first upper heating roller and a first lower heating roller are rotatably connected to the first support, and a second upper heating roller and a second lower heating roller are rotatably connected to the fourth support. A second upper heating roller and a second lower heating roller are rotationally connected to the second support, a third upper heating roller and a third lower heating roller are rotationally connected to the third support, and an upper cooling roller and a lower cooling roller are rotationally connected to the fourth support. The first upper heating roller, the first lower heating roller, the second upper heating roller, the second lower heating roller, the third upper heating roller, the third lower heating roller and the lower cooling roller are all connected with a traction system. According to the secondary foaming device for the PET foamed sheet, secondary foaming can be carried out on the PET foamed sheet, so that a thicker sheet product with a smooth surface is obtained, and the production requirement is effectively met.

Description

Technical Field

[0001] This utility model relates to a secondary foaming device for PET foamed sheets, belonging to the field of PET foamed sheet production equipment. Background Technology

[0002] PET foam sheets have excellent properties such as light weight, high strength, heat insulation, environmental friendliness, recyclability, and chemical resistance. They have rapidly replaced traditional foamed plastics such as EPS / XPS / PVC in many fields, and their application range continues to expand.

[0003] Currently, the production of PET foam sheets is constrained by factors such as foaming ratio, sheet thickness, and surface smoothness, preventing PET foam sheets from being made too thick. For applications requiring thicker sheets, products produced in a single foaming process often exhibit unsatisfactory surface smoothness after high foaming ratio production, thus affecting product quality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a PET foam sheet secondary foaming device that can perform secondary foaming of PET foam sheets.

[0005] The PET foam sheet secondary foaming device of this utility model includes a frame and a traction system. From left to right, a first support, a second support, a third support and a fourth support are fixedly connected on the frame. A first upper heating roller and a first lower heating roller are rotatably connected to the first support. A second upper heating roller and a second lower heating roller are rotatably connected to the second support. A third upper heating roller and a third lower heating roller are rotatably connected to the third support. An upper cooling roller and a lower cooling roller are rotatably connected to the fourth support. The first upper heating roller, the first lower heating roller, the second upper heating roller, the second lower heating roller, the third upper heating roller, the third lower heating roller and the lower cooling roller are all connected to the traction system.

[0006] Furthermore, a sheet guide roller is rotatably connected to the upper end of the frame, and the sheet guide roller is located on the left side of the first support.

[0007] Furthermore, the traction system includes a primary traction mechanism, a secondary traction mechanism, and a tertiary traction mechanism. The first upper heating roller, the first lower heating roller, the second upper heating roller, and the second lower heating roller are all connected to the primary traction mechanism. The third upper heating roller and the third lower heating roller are both connected to the secondary traction mechanism. The lower cooling roller is connected to the tertiary traction mechanism.

[0008] Furthermore, the primary traction mechanism includes a primary motor fixedly connected to the frame, a primary tensioning wheel and a primary guide wheel rotatably connected to the frame, a first upper drive wheel fixedly connected to the first upper heating roller, a first lower drive wheel fixedly connected to the first lower heating roller, a second lower drive wheel fixedly connected to the second lower heating roller, and a second upper drive wheel fixedly connected to the second upper heating roller. A primary transmission belt is connected to the output wheel of the primary motor. The primary transmission belt sequentially passes around the primary tensioning wheel, the first lower drive wheel, the first upper drive wheel, the second lower drive wheel, the second upper drive wheel, and the primary guide wheel, and returns to the output wheel of the primary motor to form a closed loop.

[0009] Furthermore, the secondary traction mechanism includes a secondary motor fixedly connected to the frame, a secondary tensioning wheel and a secondary guide wheel rotatably connected to the frame, a third lower drive wheel fixedly connected to the third lower heating roller, and a third upper drive wheel fixedly connected to the third upper heating roller. A secondary transmission belt is connected to the output wheel of the secondary motor. The secondary transmission belt passes sequentially around the secondary tensioning wheel, the third lower drive wheel, the third upper drive wheel, and the secondary guide wheel, and returns to the output wheel of the secondary motor to form a closed loop.

[0010] Furthermore, the three-stage traction mechanism includes a three-stage motor fixedly connected to the frame, a three-stage tensioning wheel rotatably connected to the frame, and a third drive wheel fixedly connected to the lower cooling roller. A three-stage transmission belt is connected to the output wheel of the three-stage motor. The three-stage transmission belt passes around the three-stage tensioning wheel and the third drive wheel in sequence and returns to the output wheel of the three-stage motor to form a closed loop.

[0011] Working principle and process:

[0012] The sheet material is heated by a first upper heating roller, a first lower heating roller, a second upper heating roller, a second lower heating roller, a third upper heating roller, and a third lower heating roller, causing the sheet to undergo secondary foaming and expansion. The expanded sheet material is then cooled and shaped by upper and lower cooling rollers. During this process, the traction speeds of the primary, secondary, and tertiary traction mechanisms are adjusted to counteract the deformation of the sheet material during secondary foaming and expansion, resulting in a thicker sheet product with a smooth surface.

[0013] The advantages of this utility model compared with the prior art are:

[0014] The PET foam sheet secondary foaming device described in this utility model can perform secondary foaming on PET foam sheets to obtain thicker sheet products with a smooth surface, effectively meeting production needs. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the structure of this utility model in use.

[0017] In the diagram: 1. Frame; 2. Primary motor; 3. Primary tension roller; 4. Primary drive belt; 5. First lower drive wheel; 6. First lower heating roller; 7. Sheet guide roller; 8. First upper heating roller; 9. First upper drive wheel; 10. Primary guide roller; 11. Secondary tension roller; 12. Secondary motor; 13. Secondary drive belt; 14. Secondary guide roller; 15. Second lower heating roller; 16. Second upper heating roller; 17. Second upper drive roller; 18. Second lower drive roller; 19. Third lower drive roller; 20. Third upper heating roller; 21. Third upper drive roller; 22. Upper cooling roller; 23. Third drive roller; 24. Lower cooling roller; 25. Tertiary tension roller; 26. Tertiary drive belt; 27. Tertiary motor; 28. Unwinding device; 29. ​​Rewinding device; 30. PET foam sheet; 31. Third lower heating roller. Detailed Implementation

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0019] Example 1:

[0020] like Figure 1 As shown, the PET foam sheet secondary foaming device of this utility model includes a frame 1 and a traction system. From left to right, a first support, a second support, a third support and a fourth support are fixedly connected on the frame 1. A first upper heating roller 8 and a first lower heating roller 6 are rotatably connected to the first support. A second upper heating roller 16 and a second lower heating roller 15 are rotatably connected to the second support. A third upper heating roller 20 and a third lower heating roller 31 are rotatably connected to the third support. An upper cooling roller 22 and a lower cooling roller 24 are rotatably connected to the fourth support. The first upper heating roller 8, the first lower heating roller 6, the second upper heating roller 16, the second lower heating roller 15, the third upper heating roller 20, the third lower heating roller 31 and the lower cooling roller 24 are all connected to the traction system.

[0021] When using, such as Figure 2As shown, this device is positioned between the unwinding device 28 and the winding device 29. A roll of PET foamed sheet 30 is mounted on the unwinding device 28 for unwinding. The PET foamed sheet 30, in an S-shape, sequentially winds around the first lower heating roller 6 and the first upper heating roller 8, the second lower heating roller 15 and the second upper heating roller 16, the third lower heating roller 31 and the third upper heating roller 20, the lower cooling roller 24 and the upper cooling roller 22, and finally winds onto the winding device 29 to complete the winding process. During operation, the PET foamed sheet 30 is heated by the first upper heating roller 8, the first lower heating roller 6, the second upper heating roller 16, the second lower heating roller 15, the third upper heating roller 20, and the third lower heating roller 31, causing the sheet to undergo secondary foaming and expansion. The sheet is then cooled and shaped by the upper cooling roller 22 and the lower cooling roller 24. The sheet is wound in an S-shape, which increases the heating or cooling area and the duration of action, thereby ensuring that the sheet is fully foamed and shaped.

[0022] Example 2:

[0023] like Figure 1 , Figure 2 As shown, based on Example 1,

[0024] Furthermore, a sheet guide roller 7 is rotatably connected to the upper end of the frame 1, and the sheet guide roller 7 is located on the left side of the first support. The sheet guide roller 7 can guide the PET foam sheet 30, thereby facilitating the introduction of the PET foam sheet 30 on the unwinding device 28 into the first lower heating roller 6.

[0025] Furthermore, the traction system includes a primary traction mechanism, a secondary traction mechanism, and a tertiary traction mechanism. The first upper heating roller 8, the first lower heating roller 6, the second upper heating roller 16, and the second lower heating roller 15 are all connected to the primary traction mechanism. The third upper heating roller 20 and the third lower heating roller 31 are both connected to the secondary traction mechanism, and the lower cooling roller 24 is connected to the tertiary traction mechanism. By adjusting the traction speeds of the primary, secondary, and tertiary traction mechanisms, the deformation of the sheet material during secondary foaming expansion can be offset, thereby obtaining a thicker sheet material product with a smooth surface.

[0026] Furthermore, the primary traction mechanism includes a primary motor 2 fixedly connected to the frame 1, a primary tensioning wheel 3 and a primary guide wheel 10 rotatably connected to the frame 1, a first upper drive wheel 9 fixedly connected to the first upper heating roller 8, a first lower drive wheel 5 fixedly connected to the first lower heating roller 6, a second lower drive wheel 18 fixedly connected to the second lower heating roller 15, and a second upper drive wheel 17 fixedly connected to the second upper heating roller 16. A primary transmission belt 4 is connected to the output wheel of the primary motor 2. The primary transmission belt 4 passes sequentially around the primary tensioning wheel 3, the first lower drive wheel 5, the first upper drive wheel 9, the second lower drive wheel 18, the second upper drive wheel 17, and the primary guide wheel 10, and returns to the output wheel of the primary motor 2 to form a closed loop. The operation of the primary motor 2, along with the primary drive belt 4, primary tensioning wheel 3, first lower drive wheel 5, first upper drive wheel 9, second lower drive wheel 18, second upper drive wheel 17 and primary guide wheel 10, drives the first upper heating roller 8, first lower heating roller 6, second upper heating roller 16 and second lower heating roller 15 to rotate along the running direction of the PET foam sheet 30.

[0027] Furthermore, the secondary traction mechanism includes a secondary motor 12 fixedly connected to the frame 1, a secondary tensioning wheel 11 and a secondary guide wheel 14 rotatably connected to the frame 1, a third lower drive wheel 19 fixedly connected to the third lower heating roller 31, and a third upper drive wheel 21 fixedly connected to the third upper heating roller 20. A secondary transmission belt 13 is connected to the output wheel of the secondary motor 12. The secondary transmission belt 13 sequentially passes around the secondary tensioning wheel 11, the third lower drive wheel 19, the third upper drive wheel 21, and the secondary guide wheel 14, and returns to the output wheel of the secondary motor 12 to form a closed loop. Through the action of the secondary motor 12, the third upper heating roller 20 and the third lower heating roller 31 are driven to rotate along the running direction of the PET foam sheet 30 under the action of the secondary transmission belt 13, the secondary tensioning wheel 11, the third lower drive wheel 19, the third upper drive wheel 21, and the secondary guide wheel 14.

[0028] Furthermore, the three-stage traction mechanism includes a three-stage motor 27 fixedly connected to the frame 1, a three-stage tensioning wheel 25 rotatably connected to the frame 1, and a third drive wheel 23 fixedly connected to the lower cooling roller 24. A three-stage transmission belt 26 is connected to the output wheel of the three-stage motor 27. The three-stage transmission belt 26 sequentially passes around the three-stage tensioning wheel 25 and the third drive wheel 23, and returns to the output wheel of the three-stage motor 27 to form a closed loop. By actuating the three-stage motor 27, the lower cooling roller 24 can be driven to rotate along the running direction of the PET foam sheet 30 under the action of the three-stage transmission belt 26, the three-stage tensioning wheel 25, and the third drive wheel 23.

[0029] It should be noted that in the description of this utility model, the terms "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A secondary foaming device for PET foamed sheets, characterized in that: The frame (1) includes a frame body (1) and a traction system. From left to right, the frame body (1) is fixedly connected to a first support, a second support, a third support and a fourth support. The first support is rotatably connected to a first upper heating roller (8) and a first lower heating roller (6). The second support is rotatably connected to a second upper heating roller (16) and a second lower heating roller (15). The third support is rotatably connected to a third upper heating roller (20) and a third lower heating roller (31). The fourth support is rotatably connected to an upper cooling roller (22) and a lower cooling roller (24). The first upper heating roller (8), the first lower heating roller (6), the second upper heating roller (16), the second lower heating roller (15), the third upper heating roller (20), the third lower heating roller (31) and the lower cooling roller (24) are all connected to the traction system.

2. The PET foam sheet secondary foaming device according to claim 1, characterized in that: The upper end of the frame (1) is rotatably connected to a sheet guide roller (7), which is located on the left side of the first support.

3. The PET foam sheet secondary foaming device according to claim 1 or 2, characterized in that: The traction system includes a primary traction mechanism, a secondary traction mechanism and a tertiary traction mechanism. The first upper heating roller (8), the first lower heating roller (6), the second upper heating roller (16) and the second lower heating roller (15) are all connected to the primary traction mechanism. The third upper heating roller (20) and the third lower heating roller (31) are both connected to the secondary traction mechanism. The lower cooling roller (24) is connected to the tertiary traction mechanism.

4. The PET foam sheet secondary foaming device according to claim 3, characterized in that: The primary traction mechanism includes a primary motor (2) fixedly connected to the frame (1), a primary tension wheel (3) and a primary guide wheel (10) rotatably connected to the frame (1), a first upper drive wheel (9) fixedly connected to the first upper heating roller (8), a first lower drive wheel (5) fixedly connected to the first lower heating roller (6), a second lower drive wheel (18) fixedly connected to the second lower heating roller (15), and a second upper drive wheel (17) fixedly connected to the second upper heating roller (16). A primary transmission belt (4) is connected to the output wheel of the primary motor (2). The primary transmission belt (4) passes through the primary tension wheel (3), the first lower drive wheel (5), the first upper drive wheel (9), the second lower drive wheel (18), the second upper drive wheel (17), and the primary guide wheel (10) in sequence, and returns to the output wheel of the primary motor (2) to form a closed loop.

5. The PET foam sheet secondary foaming device according to claim 3, characterized in that: The secondary traction mechanism includes a secondary motor (12) fixedly connected to the frame (1), a secondary tensioning wheel (11) and a secondary guide wheel (14) rotatably connected to the frame (1), a third lower drive wheel (19) fixedly connected to the third lower heating roller (31), and a third upper drive wheel (21) fixedly connected to the third upper heating roller (20). A secondary transmission belt (13) is connected to the output wheel of the secondary motor (12). The secondary transmission belt (13) passes through the secondary tensioning wheel (11), the third lower drive wheel (19), the third upper drive wheel (21), and the secondary guide wheel (14) in sequence, and returns to the output wheel of the secondary motor (12) to form a closed loop.

6. The PET foam sheet secondary foaming device according to claim 3, characterized in that: The three-stage traction mechanism includes a three-stage motor (27) fixedly connected to the frame (1), a three-stage tensioning wheel (25) rotatably connected to the frame (1), and a third drive wheel (23) fixedly connected to the lower cooling roller (24). A three-stage transmission belt (26) is connected to the output wheel of the three-stage motor (27). The three-stage transmission belt (26) passes around the three-stage tensioning wheel (25) and the third drive wheel (23) in sequence, and returns to the output wheel of the three-stage motor (27) to form a closed loop.

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