PET (Polyethylene Terephthalate) film smoothing device

Abstract

The utility model relates to a PET (Polyethylene Terephthalate) film smoothing device and belongs to the technical field of PET film production. A door-shaped support is arranged on the upper surface of the horizontal base plate, a hot water tank is further arranged on the upper surface of the horizontal base plate, a lifting air cylinder is arranged on the inner side of the top of the door-shaped support, a middle transition plate is arranged on an air cylinder shaft of the lifting air cylinder, a plurality of extrusion structures are arranged on the middle transition plate, and a winding structure is arranged on the right outer side of the door-shaped support. A plurality of tensioning structures are arranged on the left side and the right side of the hot water tank correspondingly. The PET film flattening device has the advantages that during use, a PET film to be flattened enters from the feeding port, sequentially passes through the tensioning structure on the left side, passes through the surface of the hot water tank and is finally wound on the winding drum, the upper face and the lower face of the PET film are ironed through hot water in the flattening idler wheel and hot water in the hot water tank respectively, then the PET film is extruded through the flattening idler wheel, and the PET film is flattened through the hot water in the hot water tank. Therefore, deep creases on the surface of the PET film are smoothed through hot extrusion, and the problem that only the PET film with shallow creases can be smoothed through cold extrusion in the prior art is solved.

Description

Technical fields:

[0001] This utility model relates to a PET film smoothing device, belonging to the field of PET film production technology. Background technology:

[0002] PET film is a comprehensive packaging film with good transparency, gloss, and airtightness. It also has excellent mechanical properties, high stiffness, dimensional stability, and good heat and cold resistance, as well as good chemical and oil resistance. During PET film production, dried raw materials are first fed into an extruder, where they are heated and melted. After passing through a pump, conveyor, and adapter, the material reaches the die head to form a sheet. The sheet is then stretched by a longitudinal stretching machine and then transversely stretched. Finally, it passes through a traction system to a winding system to form a film roll. Specialized equipment is then used to cut and process the rolled PET film.

[0003] During the production process, existing PET films often experience wrinkles and bends. If these wrinkles and bends are not removed before winding, they will not only affect subsequent production but also lead to defective products. To address these issues, the industry has developed corresponding solutions, such as the Chinese authorized utility model patent with authorization announcement number CN220219655U, entitled "A PET Film Smoothing Equipment." In this patent, the PET film body is pressed down from above by smoothing roller blocks, smoothing rollers, and pressure rollers, and the smoothing rollers smooth the PET film body to achieve the purpose of smoothing the PET film.

[0004] The above-mentioned patent has the following problems when used: Although the above-mentioned patent can achieve the smoothing of PET film, the existing extrusion smoothing is cold extrusion, which can only smooth some shallow creases. It is difficult to smooth some deep creases in a short period of time. In view of the above problems, the industry needs a new type of PET film smoothing device to solve the problems faced by the industry. Summary of the Invention:

[0005] The technical problem to be solved by this utility model is to provide a PET film smoothing device to solve the problems faced in the industry.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a PET film smoothing device, including a bottom support frame, a horizontal seat plate on the bottom support frame, a portal frame on the upper surface of the horizontal seat plate, a hot water tank on the upper surface of the horizontal seat plate, the hot water tank being located inside the portal frame, a lifting cylinder on the top inner side of the portal frame, an intermediate transition plate on the cylinder shaft of the lifting cylinder, multiple extrusion structures on the intermediate transition plate, a winding structure on the right outer side of the portal frame, multiple tensioning structures on the left and right sides of the hot water tank, an inlet and an outlet on the left and right sides of the portal frame, a PET film in the inlet, the PET film passing through the portal frame and connected to the winding structure.

[0007] Preferably, the hot water tank has an internal hollow structure, the hot water tank is filled with hot water, a water pump is provided on the left outer side of the hot water tank, the hot water tank is also provided with an inlet hole and an outlet hole, the water pump is provided with an inlet pipe and a drain pipe, one end of the inlet pipe is inserted into the inlet hole, and one end of the drain pipe is connected to the extrusion structure.

[0008] Preferably, the extrusion structure includes a smoothing roller with a cylindrical structure and a hollow interior. Side baffles are respectively provided at both ends of the smoothing roller. An insertion hole is provided on the side baffle, which extends from one side of the side baffle to the other side. A bearing hole is also provided on the side baffle, which is coaxial with the insertion hole. A bearing is installed in the bearing hole. An insertion tube is provided in the insertion hole. A leak-proof baffle is provided on the inner side of the side baffle.

[0009] Preferably, the leak-proof baffle has a central through hole that extends from the left side to the right side of the leak-proof baffle. An inner sealing ring groove is provided in the central through hole. A side sealing ring groove is also provided on the side of the leak-proof baffle. Sealing rings are provided in the inner sealing ring groove and the side sealing ring groove, respectively. The leak-proof baffle also has multiple fixing through holes.

[0010] Preferably, the insertion tube includes a hollow tube body that is open at both ends, the tube body is provided with a pipe insertion hole, a sealing plate is provided on the side of the insertion tube, an L-shaped bracket is provided on the side of the sealing plate, and the L-shaped bracket is fixed to the intermediate transition plate.

[0011] Preferably, the winding structure includes a winding bracket installed on the right outer side of the portal frame, a winding motor is provided on the winding bracket, a winding drum is provided on the motor shaft of the winding motor, and the PET film is wound on the winding drum.

[0012] Preferably, the tensioning structure includes a tensioning base, a tensioning spring is provided on the tensioning base, and a tensioning pressure plate is provided at the end of the tensioning spring.

[0013] Compared with the prior art, the advantages of this utility model are as follows: When in use, the PET film to be smoothed enters from the feed port, passes through the tensioning structure on the left side in sequence, and finally winds onto the take-up drum through the surface of the hot water tank. The smoothing roller is pressed onto the PET film, and the hot water in the smoothing roller and the hot water in the hot water tank iron the top and bottom sides of the PET film respectively. Then, the smoothing roller squeezes the PET film, thereby smoothing the deep creases on the surface of the PET film through hot extrusion. This solves the problem that the cold extrusion in the prior art can only smooth the PET film with shallow creases. This utility model has a novel structure and is easy to operate. Attached image description:

[0014] The present invention will be further described below with reference to the accompanying drawings.

[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 after removing the connecting pipe.

[0017] Figure 3 This is a schematic diagram showing the extrusion structure, PET film, and hot water tank in use.

[0018] Figure 4 This is a schematic diagram of the extrusion structure.

[0019] Figure 5 This is an exploded view of the extrusion structure.

[0020] Figure 6 This is a schematic diagram of the installation of the side baffle and the insertion tube.

[0021] Figure 7 This is a structural diagram of the leak-proof baffle.

[0022] Figure 8 This is a schematic diagram of the insertion tube.

[0023] Figure 9 This is a schematic diagram of the pipe connection between the extrusion structure and the hot water tank.

[0024] In the diagram: 1. Bottom support frame; 2. Horizontal seat plate; 3. Portal bracket; 301. Feed inlet; 302. Discharge outlet; 4. Hot water tank; 401. Water pump; 402. Liquid inlet; 403. Liquid outlet; 404. Water inlet pipe; 405. Drain pipe; 5. Lifting cylinder; 6. Intermediate transition plate; 7. Extrusion structure; 701. Smoothing roller; 702. Side baffle; 703. Insertion hole; 704. Bearing hole; 705. Bearing; 8. Rewinding structure; 801 802. Winding bracket; 803. Winding motor; 804. Winding drum; 9. Tensioning structure; 905. Tensioning base; 906. Tensioning spring; 907. Tensioning plate; 10. Leak-proof baffle; 1008. Central through hole; 1009. Inner sealing ring groove; 10000. Side sealing ring groove; 10001. Fixing through hole; 11. Insertion tube; 1101. Tube body; 1102. Pipe insertion hole; 1103. Sealing plate; 1104. L-shaped bracket; 12. PET film. Detailed implementation method:

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0026] like Figures 1 to 9 The illustrated PET film smoothing device includes a bottom support frame 1, a horizontal seat plate 2 on the bottom support frame 1, a portal frame 3 on the upper surface of the horizontal seat plate 2, a hot water tank 4 on the upper surface of the horizontal seat plate 2, the hot water tank 4 being located inside the portal frame 3, a lifting cylinder 5 on the top inner side of the portal frame 3, an intermediate transition plate 6 on the cylinder shaft of the lifting cylinder 5, multiple extrusion structures 7 on the intermediate transition plate 6, a winding structure 8 on the right outer side of the portal frame 3, multiple tensioning structures 9 on the left and right sides of the hot water tank 4, an inlet 301 and an outlet 302 on the left and right sides of the portal frame 3, a PET film 10 in the inlet 301, the PET film 10 passing through the portal frame 3 and connected to the winding structure 8.

[0027] like Figure 2 As shown, in order to keep the temperature in the hot water tank 4 and the smoothing roller 701 consistent, the hot water tank 4 is further designed to be hollow inside. The hot water tank 4 is filled with hot water, and a water pump 401 is provided on the left outer side of the hot water tank 4. The hot water tank 4 is also provided with an inlet hole 402 and an outlet hole 403. The water pump 401 is provided with an inlet pipe 404 and a drain pipe 405. One end of the inlet pipe 404 is inserted into the inlet hole 402, and one end of the drain pipe 405 is connected to the extrusion structure 7.

[0028] like Figure 5 and Figure 6As shown, in order to achieve the effect of squeezing and smoothing, a squeezing structure 7 is further provided. The squeezing structure 7 includes a smoothing roller 701 with a cylindrical structure and a hollow interior. Side baffles 702 are respectively provided at both ends of the smoothing roller 701. An insertion hole 703 is provided on the side baffle 702, which extends from one side of the side baffle 702 to the other side. A bearing hole 704 is also provided on the side baffle 702. The bearing hole 704 is coaxial with the insertion hole 703. A bearing 705 is installed in the bearing hole 704. An insertion tube 11 is provided in the insertion hole 703. A leak-proof baffle 10 is provided on the inner side of the side baffle 702.

[0029] like Figure 7 As shown, the leak-proof baffle 10 is provided with a central through hole 1001, which extends from the left side to the right side of the leak-proof baffle 10. An inner sealing ring groove 1002 is provided in the central through hole 1001. A side sealing ring groove 1003 is also provided on the side of the leak-proof baffle 10. Sealing rings are respectively provided in the inner sealing ring groove 1002 and the side sealing ring groove 1003. The leak-proof baffle 10 is also provided with a plurality of fixing through holes 1004.

[0030] like Figure 8 As shown, the insertion tube 11 includes a hollow tube body 1101 with both ends open. The tube body 1101 is provided with a tube insertion hole 1102. A sealing plate 1103 is also provided on the side of the tube body 1101. An L-shaped bracket 1104 is also provided on the side of the sealing plate 1103. The L-shaped bracket 1104 is also fixed to the intermediate transition plate 6.

[0031] To achieve the purpose of winding, the winding structure 8 further includes a winding bracket 801 installed on the right outer side of the portal frame, a winding motor 802 is provided on the winding bracket 801, a winding drum 803 is provided on the motor shaft of the winding motor 802, and the PET film 10 is wound on the winding drum 803.

[0032] To achieve the purpose of tensioning, the tensioning structure 9 further includes a tensioning base 901, a tensioning spring 902 is provided on the tensioning base 901, and a tensioning pressure plate 903 is provided at the end of the tensioning spring 902.

[0033] Before use, fix the leak-proof baffle 10 to the inside of the side baffle 702, place multiple sealing rings on the leak-proof baffle 10, and then fix the side baffle 702 to both sides of the smoothing roller 701. Then insert the insertion tube 11 into the insertion hole 703 and the middle through hole 1001. Since the insertion tube 11 is also equipped with an L-shaped bracket 1104, and the L-shaped bracket 1104 is fixed on the middle transition plate 6, the insertion tube 11 is fixed in place during actual use, while the smoothing roller 701 rotates through the bearing 705.

[0034] Add hot water to the hot water tank 4, insert one end of the inlet pipe 404 into the liquid inlet hole 402, connect the other end of the inlet pipe 404 to the water pump 401, connect one end of the drain pipe 405 to the water pump 401, connect the other end of the drain pipe 405 to one end of the smoothing roller 701 on the left, then connect multiple smoothing rollers 701 in series with each other using a connecting pipe, and then connect the connecting pipe to the liquid outlet hole 403. In this way, multiple smoothing rollers 701 are connected in series with each other.

[0035] In use, the PET film 12 to be smoothed is passed through the feed inlet 301, through multiple tension springs 902, and placed on the upper surface of the hot water tank 4. Finally, it passes through the discharge outlet 302 and is wound onto the take-up drum 803. At this time, the water pump 401 is activated, drawing hot water from the hot water tank 4 and delivering it through water pipes to each smoothing roller 701. This maintains a consistent temperature between the hot water in the hot water tank 4 and each smoothing roller 701. The lifting cylinder 5 is activated, causing the extrusion structure 7 to descend to a set position. At this point, the smoothing rollers 701 on the extrusion structure 7 press against the PET film 12. Then, the take-up motor 802 is activated, and the film is wound onto the take-up drum 803. Machine 802 drives the take-up drum 803 to rotate. At this time, the PET film 12 moves with the rotation of the take-up drum 803. During the movement of the PET film 12, the smoothing roller 701 also rolls. At this time, the lower surface of the PET film 12 is ironed by the hot water tank 4, and the upper surface of the PET film 12 is ironed by the smoothing roller 701. Thus, the upper and lower surfaces of the PET film 12 are ironed separately. At the same time, the smoothing roller 701 squeezes and smooths the PET film 12. In this way, the hot extrusion can squeeze and iron the deeper creases, thus solving the problem that the cold extrusion in the prior art can only smooth the shallow creases of the PET film, improving the efficiency and effect of smoothing.

[0036] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A PET film smoothing device, characterized in that: Includes a bottom support frame (1), on which a horizontal seat plate (2) is provided. A portal frame bracket (3) is provided on the upper surface of the horizontal seat plate (2). A hot water tank (4) is also provided on the upper surface of the horizontal seat plate (2). The hot water tank (4) is located inside the portal frame bracket (3). A lifting cylinder (5) is provided on the top inner side of the portal frame bracket (3). An intermediate transition plate (6) is provided on the cylinder shaft of the lifting cylinder (5). The portal frame (3) is provided with multiple extrusion structures (7), and a winding structure (8) is provided on the right outer side of the portal frame (3). Multiple tensioning structures (9) are provided on the left and right sides of the hot water tank (4). A feed inlet (301) and a discharge outlet (302) are provided on the left and right sides of the portal frame (3). A PET film (12) is provided in the feed inlet (301). The PET film (10) passes through the portal frame (3) and is connected to the winding structure (8).

2. The PET film smoothing device according to claim 1, characterized in that: The hot water tank (4) has an internal hollow structure and is filled with hot water. A water pump (401) is provided on the left outer side of the hot water tank (4). The hot water tank (4) is also provided with an inlet hole (402) and an outlet hole (403). The water pump (401) is provided with an inlet pipe (404) and a drain pipe (405). One end of the inlet pipe (404) is inserted into the inlet hole (402), and one end of the drain pipe (405) is connected to the extrusion structure (7).

3. The PET film smoothing device according to claim 1, characterized in that: The extrusion structure (7) includes a smoothing roller (701) with a cylindrical structure and a hollow interior. Side baffles (702) are provided at both ends of the smoothing roller (701). An insertion hole (703) is provided on the side baffle (702). The insertion hole (703) extends from one side of the side baffle (702) to the other side. A bearing hole (704) is also provided on the side baffle (702). The bearing hole (704) is coaxial with the insertion hole (703). A bearing (705) is installed in the bearing hole (704). An insertion tube (11) is provided in the insertion hole (703). A leak-proof baffle (10) is provided on the inner side of the side baffle (702).

4. The PET film smoothing device according to claim 3, characterized in that: The leak-proof baffle (10) is provided with a central through hole (1001), which extends from the left side to the right side of the leak-proof baffle (10). An inner sealing ring groove (1002) is provided in the central through hole (1001). A side sealing ring groove (1003) is also provided on the side of the leak-proof baffle (10). Sealing rings are respectively provided in the inner sealing ring groove (1002) and the side sealing ring groove (1003). A plurality of fixed through holes (1004) are also provided on the leak-proof baffle (10).

5. The PET film smoothing device according to claim 4, characterized in that: The insertion tube (11) includes a hollow tube body (1101) that is open at both ends. The tube body (1101) is provided with a tube insertion hole (1102). A sealing plate (1103) is also provided on the side of the tube body (1101). An L-shaped bracket (1104) is also provided on the side of the sealing plate (1103). The L-shaped bracket (1104) is also fixed to the intermediate transition plate (6).

6. The PET film smoothing device according to claim 1, characterized in that: The winding structure (8) includes a winding bracket (801) installed on the right outer side of the portal frame. A winding motor (802) is provided on the winding bracket (801). A winding drum (803) is provided on the motor shaft of the winding motor (802). The PET film (10) is wound on the winding drum (803).

7. The PET film smoothing device according to claim 1, characterized in that: The tensioning structure (9) includes a tensioning base (901), a tensioning spring (902) is provided on the tensioning base (901), and a tensioning pressure plate (903) is provided at the end of the tensioning spring (902).

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