Cooling device for polyester film with high elongation at break

Abstract

The utility model discloses a cooling device for a polyester film with high elongation at break, which comprises a pre-cooling tank, a cold water tank and an air-drying box which are sequentially arranged from bottom to top, four support columns are fixedly connected among the pre-cooling tank, the cold water tank and the air-drying box, a first guide component is mounted in the pre-cooling tank, and a second guide component is mounted in the air-drying box. A first guide assembly is installed in the air drying box, a second guide assembly is installed in the air drying box, a thin film conveying path is formed between the first guide assembly and the second guide assembly, a water inlet pipe is fixedly embedded in the side wall of the cold water tank, a cooling tank is formed in the bottom wall of the cold water tank and located on the thin film conveying path, and the thin film is primarily cooled in the pre-cooling tank; according to the pre-cooling device, the influence on the quality of the film due to rapid change of the cooling temperature can be avoided, then the cold water penetrates through the cooling tank in the cold water tank, and the cold water downwards flows into the pre-cooling tank along a gap between the cooling tank and the film, so that the cold water and the film have larger contact area and longer contact time, and the temperature change is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of film production, in particular to a cooling device for a polyester film with high elongation at break. Background Art

[0002] Polyester film is a polymer film material with excellent comprehensive properties. It has high mechanical strength, good heat and cold resistance, easy recycling, and is non-toxic and odorless. Through processes such as lamination and aluminum plating, its heat sealability, gas barrier properties, and light barrier properties can be improved. Polyester film is widely used in the packaging of food, beverages, medicine, and daily necessities, and has also expanded into applications such as construction, electronics, electrical engineering, optics, and photovoltaic power generation. The production process of polyester film includes casting, longitudinal stretching, transverse stretching, heat setting treatment, thickness testing, corona treatment, online detection, and winding.

[0003] Chinese patent publication number CN218429821U discloses a film cooling and shaping device, which includes a cooling trough containing cooling water for cooling the film; a partition plate that divides the cooling trough into multiple cooling areas; an inclined channel that is arranged at one end of the cooling trough, the inclined channel being arranged upwardly away from the end of the cooling trough, and the film passing through the cooling trough passes through the inclined channel along the inclined direction of the inclined channel; and a drying chamber that is used to dry the film sent out of the inclined channel; the film passes through the multiple cooling areas in sequence, and the cooling water passes through the multiple cooling areas in sequence in the direction opposite to the direction of movement of the film. By setting up multiple cooling areas and allowing the cooling water to flow in the multiple cooling areas in sequence, the cooling water temperature is the highest in the cooling area that the film first enters, and the temperature of the subsequent cooling areas gradually decreases, so that the film does not experience a sharp temperature change, reducing the impact on the film performance;

[0004] The film in the above technology needs to pass through multiple cooling areas for cooling, and there are temperature differences in different cooling areas. The temperature of the film increases unevenly, which still has an adverse effect on the performance of the film. Therefore, the utility model discloses a cooling device for polyester film with high elongation at break to solve the above problem. Utility Model Content

[0005] The purpose of the present utility model is to provide a cooling device for polyester film with high elongation at break, so as to solve the problem proposed in the above-mentioned background technology that the film in the traditional film cooling equipment needs to pass through multiple cooling areas for cooling, and there are temperature differences in different cooling areas, the temperature of the film increases unevenly, and there is still an adverse effect on the performance of the film.

[0006] To achieve the above objectives, the present invention solves the above technical problems as follows:

[0007] A cooling device for high-elongation-at-break polyester film comprises a pre-cooling tank, a cold water tank, and an air drying box, arranged sequentially from bottom to top; four support columns are fixedly connected between the pre-cooling tank, the cold water tank, and the air drying box; a first guide assembly is installed in the pre-cooling tank; a second guide assembly is installed in the air drying box; a film transmission path is formed between the first guide assembly and the second guide assembly;

[0008] Wherein, a water inlet pipe is fixedly embedded on the side wall of the cold water tank, a cooling tank is opened on the bottom wall of the cold water tank, and the cooling tank is located on the transmission path of the film.

[0009] As a further solution of the present invention, the first guide assembly includes an inlet groove located on the side wall of the pre-cooling tank and a first steering roller, a pressure roller and a second steering roller rotating between the inner walls on both sides of the pre-cooling tank, and the height of the pressure roller is lower than the liquid level in the pre-cooling tank.

[0010] As a further solution of the present invention, the second guide assembly includes a wire outlet groove located on the side wall of the drying box and a plurality of first guide rollers and a plurality of second guide rollers rotatably connected between the inner walls on both sides of the drying box. The first guide rollers and the second guide rollers are staggered so that a serpentine-shaped film is formed between the first guide rollers and the second guide rollers.

[0011] As a further solution of the present invention, a wire passing port is provided on the lower side of the air drying box, and positioning plates are fixedly connected to both sides of the wire passing port and located on the lower side of the air drying box, and two guide rods are slidably embedded on the positioning plates, and an extrusion bar is fixedly connected between two adjacent guide rods, and a spring is sleeved on the outer side of the guide rod and located between the extrusion bar and the positioning plate, so that a film is clamped between the two extrusion bars.

[0012] As a further solution of the present invention, the wire passing port, the cooling trough and the second turning roller are all located in the same vertical plane, so that the film between the first guide assembly and the second guide assembly is in a vertical state.

[0013] As a further solution of the present invention, two fans are fixedly embedded on one side of the air drying box, and an exhaust frame is fixedly embedded on the other side of the air drying box, and a dustproof net is fixed in the exhaust frame.

[0014] As a further solution of the present invention, a drainage pipe is fixedly embedded in the side wall of the pre-cooling tank, and an extension plate is fixedly connected to the lower side of the pre-cooling tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This utility model relates to a cooling device for polyester film with high elongation at break. The film is initially cooled in a pre-cooling tank to avoid rapid changes in cooling temperature that could affect film quality. The film then passes through the cooling trough in the cold water tank. Cold water flows downward along the gap between the cooling trough and the film into the pre-cooling tank, allowing the cold water to have a larger contact area and longer contact time with the film, resulting in more uniform temperature changes, thereby improving cooling efficiency and enhancing film quality.

[0017] 2. The utility model provides a cooling device for polyester film with high elongation at break. The spring pushes the extrusion bar close to the film, which can squeeze out water droplets on the surface of the film to prevent excessive moisture from affecting the air-drying effect. In the air-drying box, the film passes through the staggered distribution of the first guide roller and the second guide roller to form a serpentine arrangement, which increases the contact area between the hot air and the film and helps to quickly dry the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a three-dimensional structural diagram of a cooling device for a polyester film with high elongation at break according to the present invention;

[0020] Figure 2 This is a side sectional view of a cooling device for a polyester film with high elongation at break according to the present invention;

[0021] Figure 3 This is a cooling device for a polyester film with high elongation at break. Figure 1 A magnified view of the structure at point A;

[0022] Figure 4 This is a cooling device for a polyester film with high elongation at break. Figure 2 A magnified view of the structure at point B in the middle;

[0023] Figure 5 This is a bottom cross-sectional view of a cooling device for a polyester film with high elongation at break according to the present invention;

[0024] Figure 6 This is a top view of the structure of a cooling device for a polyester film with high elongation at break according to the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1. Pre-cooling trough; 11. Drain pipe; 12. Extension plate; 2. Cold water trough; 21. Water inlet pipe; 22. Cooling trough; 3. Air drying box; 31. Wire passing port; 32. Positioning plate; 33. Guide rod; 34. Extrusion strip; 35. Spring; 36. Fan; 37. Exhaust frame; 38. Dust screen; 4. Support column; 5. First guide assembly; 51. Wire inlet trough; 52. First steering roller; 53. Pressing roller; 54. Second steering roller; 6. Second guide assembly; 61. Wire outlet trough; 62. First guide roller; 63. Second guide roller. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the embodiments.

[0028] See also Figure 1-6 The present invention provides a cooling device for polyester film with high elongation at break, comprising a pre-cooling tank 1, a cold water tank 2 and an air drying box 3 arranged in sequence from bottom to top, four support columns 4 are fixedly connected between the pre-cooling tank 1, the cold water tank 2 and the air drying box 3, a drainage pipe 11 is fixedly embedded in the side wall of the pre-cooling tank 1, and an extension plate 12 is fixedly connected to the lower side of the pre-cooling tank 1;

[0029] Specifically, the extension plate 12 is used to expand the bottom area of ​​the pre-cooling tank 1, which can improve the stability of the equipment. The main function of the drain pipe 11 is to discharge the cooling water in the pre-cooling tank 1, so that the cooling water can be replaced as needed during the production process to maintain a suitable cooling temperature. It is also convenient to drain the water in the pre-cooling tank 1 after production is completed, which is convenient for cleaning and maintenance of the equipment.

[0030] Furthermore, a first guide assembly 5 is installed in the pre-cooling tank 1, and the first guide assembly 5 includes an inlet groove 51 located on the side wall of the pre-cooling tank 1 and a first turning roller 52, a pressure roller 53 and a second turning roller 54 rotating between the inner walls on both sides of the pre-cooling tank 1, and the height of the pressure roller 53 is lower than the liquid level in the pre-cooling tank 1;

[0031] Specifically, the function of the pressure roller 53 is to press the film into the cooling liquid to ensure that the film is in full contact with the cooling liquid to achieve heat exchange, which is crucial for improving the elongation at break of the film. The film is initially cooled in the pre-cooling tank 1 to avoid the rapid change of the cooling temperature and the impact on the quality of the film.

[0032] Furthermore, a second guide assembly 6 is installed in the air drying box 3. The second guide assembly 6 includes a wire outlet groove 61 located on the side wall of the air drying box 3 and a plurality of first guide rollers 62 and a plurality of second guide rollers 63 rotatably connected between the inner walls of both sides of the air drying box 3. The first guide rollers 62 and the second guide rollers 63 are staggered so that a serpentine film is formed between the first guide rollers 62 and the second guide rollers 63.

[0033] Specifically, in the air drying box 3, the film passes around the first guide roller 62 and the second guide roller 63 in sequence, so that the film is arranged in a serpentine shape. By increasing the path length of the film in the air drying box 3, it is ensured that each part of the film can get sufficient hot air contact, achieving a more uniform drying effect.

[0034] Furthermore, a film transmission path is formed between the first guide assembly 5 and the second guide assembly 6. A water inlet pipe 21 is fixedly embedded on the side wall of the cold water trough 2. A cooling trough 22 is opened on the bottom wall of the cold water trough 2, and the cooling trough 22 is located on the film transmission path. The wire passing port 31, the cooling trough 22 and the second turning roller 54 are all located in the same vertical plane, so that the film between the first guide assembly 5 and the second guide assembly 6 is in a vertical state.

[0035] Specifically, when the film passes through the cooling trough 22 in a vertical state, the cooling water can contact the film more evenly, which helps to improve the uniformity of cooling, thereby improving the cooling effect of the film.

[0036] Furthermore, a wire passing opening 31 is provided on the lower side of the air drying box 3, and a positioning plate 32 is fixedly connected to both sides of the wire passing opening 31 and located on the lower side of the air drying box 3, and two guide rods 33 are slidably embedded on the positioning plate 32, and an extrusion bar 34 is fixedly connected between two adjacent guide rods 33, and a spring 35 is sleeved on the outer side of the guide rod 33 and located between the extrusion bar 34 and the positioning plate 32, so that a film is clamped between the two extrusion bars 34;

[0037] Specifically, the function of the spring 35 is to provide the necessary elastic force for the extrusion strip 34, so that the extrusion strip 34 can be tightly attached to the film and apply pressure evenly, so that the water droplets on the surface of the film can be squeezed off, preventing excessive moisture residue on the surface of the film from affecting the air-drying effect. It is worth noting that a sponge layer can be adhered to the surface of the extrusion strip 34 to absorb and block water droplets and avoid damage to the film.

[0038] Furthermore, two fans 36 are fixedly embedded on one side of the air drying box 3, and an exhaust frame 37 is fixedly embedded on the other side of the air drying box 3. A dustproof net 38 is fixed in the exhaust frame 37.

[0039] Specifically, the main function of the fan 36 is to generate wind to blow across the surface of the film, accelerate the evaporation of moisture on the film, and thus achieve rapid drying of the film. The main function of the dustproof net 38 is to prevent dust and other impurities from entering the interior of the air drying box 3, thereby keeping the environment inside the box clean.

[0040] Working principle:

[0041] During use, under the traction of the winding device, the film passes through the wire feed slot 51 and bypasses the first turning roller 52, the pressure roller 53 and the second turning roller 54 in turn, so that the film can be cooled in the pre-cooling slot 1. After that, the film passes through the cooling slot 22 and the wire port 31 from bottom to top and enters the air-drying box 3, and the cold water in the cold water slot 2 flows downward into the pre-cooling slot 1 through the gap between the cooling slot 22 and the film, increasing the heat exchange area and time between the cold water and the film, and improving the cooling efficiency of the film. During this process, the spring 35 pushes the extrusion bar 34 to stick to the film, so that water droplets on the surface of the film can be squeezed off, preventing excessive moisture residue on the surface of the film from affecting the air-drying effect. In the air-drying box 3, the film bypasses the first guide roller 62 and the second guide roller 63 in turn, so that the film is arranged in a serpentine shape. The hot air blown out by the fan 36 passes through the tortuous area of ​​the film, which can quickly take away the moisture on the surface of the film, thereby drying the film.

Claims

1. A cooling device for high elongation at break polyester film, characterized in that: The invention comprises a pre-cooling tank (1), a cold water tank (2) and an air drying box (3) which are arranged in sequence from bottom to top, four support columns (4) are fixedly connected between the pre-cooling tank (1), the cold water tank (2) and the air drying box (3), a first guide assembly (5) is installed in the pre-cooling tank (1), a second guide assembly (6) is installed in the air drying box (3), and a film transmission path is formed between the first guide assembly (5) and the second guide assembly (6); A water inlet pipe (21) is fixedly embedded on the side wall of the cold water trough (2), a cooling trough (22) is provided on the bottom wall of the cold water trough (2), and the cooling trough (22) is located on the transmission path of the film.

2. The cooling device for high elongation at break polyester film according to claim 1, characterized in that: The first guide assembly (5) includes a wire feed groove (51) located on the side wall of the pre-cooling groove (1), and a first steering roller (52), a pressure roller (53) and a second steering roller (54) rotating between the inner walls on both sides of the pre-cooling groove (1), and the height of the pressure roller (53) is lower than the liquid level in the pre-cooling groove (1).

3. The cooling device for high elongation at break polyester film according to claim 2, characterized in that: The second guide assembly (6) includes a wire outlet groove (61) located on the side wall of the air drying box (3) and a plurality of first guide rollers (62) and a plurality of second guide rollers (63) rotatably connected between the inner walls on both sides of the air drying box (3), and the first guide rollers (62) and the second guide rollers (63) are staggered so that a serpentine film is formed between the first guide rollers (62) and the second guide rollers (63).

4. The cooling device for high elongation at break polyester film according to claim 3, characterized in that: The lower side of the air drying box (3) is provided with a wire passing opening (31), and positioning plates (32) are fixedly connected on both sides of the wire passing opening (31) and located at the lower side of the air drying box (3), and two guide rods (33) are slidably embedded on the positioning plate (32), and an extrusion strip (34) is fixedly connected between two adjacent guide rods (33), and a spring (35) is sleeved on the outer side of the guide rod (33) and located between the extrusion strip (34) and the positioning plate (32), so that a film is clamped between the two extrusion strips (34).

5. The cooling device for high elongation at break polyester film according to claim 4, characterized in that: The wire passing port (31), the cooling trough (22) and the second turning roller (54) are all located in the same vertical plane, so that the film between the first guide assembly (5) and the second guide assembly (6) is in a vertical state.

6. The cooling device for high elongation at break polyester film according to claim 1, characterized in that: Two fans (36) are fixedly embedded on one side of the air drying box (3), and an exhaust frame (37) is fixedly embedded on the other side of the air drying box (3), wherein a dustproof net (38) is fixed in the exhaust frame (37).

7. The cooling device for high elongation at break polyester film according to claim 1, characterized in that: A drainage pipe (11) is fixedly embedded in the side wall of the pre-cooling tank (1), and an extension plate (12) is fixedly connected to the lower side of the pre-cooling tank (1).

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