Polytetrafluoroethylene film degreasing recovery, preheating stretching and high-temperature setting all-in-one machine

Abstract

The utility model relates to the technical field of film processing, and discloses a polytetrafluoroethylene film degreasing recovery, preheating stretching and high-temperature setting all-in-one machine, which comprises degreasing recovery equipment, preheating equipment, stretching equipment and high-temperature setting equipment, the circulating cooling water heat exchange device is arranged above the degreasing device, the stretching device is arranged between the preheating device and the high-temperature shaping device, and the preheating device is arranged on one side of the degreasing recovery device. Parts of structures of the two devices are combined for use, so that a film can be kept at high temperature in the degreasing process and then directly enters the preheating, stretching and high-temperature shaping devices, partial repeated processes are omitted, the parts of structures of the two independent devices are omitted, the device cost is reduced, and the production efficiency is improved. And due to the combination of process equipment, the processing efficiency of the polytetrafluoroethylene film is effectively improved.

Description

Integrated machine for degreasing, recycling, preheating, stretching and high-temperature setting of polytetrafluoroethylene film Technical Field

[0001] This utility model belongs to the field of thin film processing technology, specifically relating to an integrated machine for degreasing and recycling, preheating and stretching, and high-temperature setting of polytetrafluoroethylene (PTFE) films. PTFE films are widely used in aerospace, electronic packaging, and other fields due to their chemical resistance, low coefficient of friction, and wide temperature range. In existing technologies, the separation of degreasing and stretching / setting processes leads to high energy consumption and long process cycles. This utility model solves these problems through an integrated design. Background Technology

[0002] Polytetrafluoroethylene (PTFE) film, also known as Teflon film, is made from suspended PTFE resin through molding, sintering, cooling into a blank, followed by machining and calendering. PTFE film is widely used in many fields due to its excellent high and low temperature resistance, chemical stability, and electrical insulation properties.

[0003] The production of polytetrafluoroethylene (PTFE) film typically involves multiple processes, including degreasing, stretching, and shaping. Current PTFE film processing technology separates the use of a PTFE film degreasing and recycling device (patent pending CN205836042U) from a PTFE film preheating, stretching, and high-temperature shaping device. However, this separation leads to repetition of some heating and preheating processes, impacting PTFE film processing efficiency. Furthermore, the separation of degreasing and stretching / shaping equipment in existing technologies results in temperature loss during film transfer, requiring additional heating to the target temperature, significantly increasing energy consumption. Repeated clamping also easily causes scratches on the film surface, reducing the yield.

[0004] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An integrated machine for degreasing, recycling, preheating, stretching, and high-temperature setting of polytetrafluoroethylene (PTFE) film includes a degreasing and recycling device, a preheating device, a stretching device, and a high-temperature setting device. The degreasing and recycling device consists of a degreasing unit and a circulating cooling water heat exchange unit, which is located above the degreasing unit. The stretching device is located between the preheating device and the high-temperature setting device, with the preheating device located on one side of the degreasing and recycling device. Several heating rollers are installed inside the degreasing unit, the preheating device, the stretching device, and the high-temperature setting device.

[0007] In a preferred embodiment of this utility model, a constant tension unwinding device is provided on the side of the degreasing and recycling equipment, and a control box is installed on the top of the constant tension unwinding device. The constant tension unwinding device is driven by a servo motor, and the control box integrates a PLC module.

[0008] In a preferred embodiment of this utility model, an oil-water separation tank is provided on the side of the constant tension unwinding device, and a liquid delivery pipe is connected to the circulating cooling water heat exchange device. The liquid delivery pipe is connected to the oil-water separation tank, and the oil-water separation tank is equipped with multiple layers of stainless steel filter screens.

[0009] In a preferred embodiment of this utility model, a cooling device is provided on the side of the high-temperature setting equipment, and a constant tension winding device and a correction device are provided on the side of the cooling device. The correction device is installed on the constant tension winding device, and the cooling device adopts a combination of air cooling and water cooling.

[0010] In a preferred embodiment of this utility model, the internal water flow path of the circulating cooling water heat exchange device is arranged in the opposite direction to the hot air flow direction of the degreasing device, which significantly improves the heat exchange efficiency.

[0011] In a preferred embodiment of this utility model, the surface of the heating roller is coated with a high-temperature resistant coating to ensure uniform heating of the film.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention combines existing PTFE film degreasing and recycling equipment with PTFE film preheating, stretching, and high-temperature setting equipment. By integrating parts of the two devices, the film retains the high temperature from the degreasing process and then directly enters the preheating, stretching, and high-temperature setting equipment, eliminating some repetitive processes. This combination not only saves on the structure of two separate devices, reducing equipment costs, but also effectively improves the processing efficiency of PTFE film. Through integrated design, this invention eliminates repeated heating steps, allowing the film to directly enter subsequent processes after degreasing while retaining residual heat. Actual measurements show a significant reduction in energy consumption, a marked shortening of the processing cycle, and an effective increase in yield.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 is a schematic diagram of the structure of a polytetrafluoroethylene film degreasing and recycling device in the prior art;

[0017] Figure 2 is a schematic diagram of the overall structure of the integrated machine for degreasing, recycling, preheating, stretching and high-temperature setting of polytetrafluoroethylene film of this utility model.

[0018] Figure 3 is a schematic diagram of the preheating and stretching equipment of the integrated machine for degreasing, recycling, preheating, stretching and high-temperature setting of polytetrafluoroethylene film of this utility model.

[0019] Figure 4 is a schematic diagram of the high-temperature setting equipment structure of the integrated machine for degreasing and recycling, preheating and stretching, and high-temperature setting of polytetrafluoroethylene film of this utility model.

[0020] In the diagram: 1. Degreasing and recovery equipment; 2. Degreasing device; 3. Circulating cooling water heat exchange device; 4. Heating roller; 5. Cooling device; 6. Constant tension unwinding device; 7. Constant tension winding device; 8. Liquid delivery pipe; 9. Oil-water separator; 10. Control box; 11. Preheating equipment; 12. Stretching equipment; 13. High temperature setting equipment; 14. Correction device. Detailed Implementation

[0021] The following detailed description of the implementation details of the polytetrafluoroethylene film degreasing and recycling, preheating stretching and high-temperature setting integrated machine of this utility model, with reference to specific embodiments, is provided so that those skilled in the art can implement this utility model.

[0022] As shown in Figures 1 to 4: The integrated machine for degreasing and recycling, preheating and stretching, and high-temperature setting of polytetrafluoroethylene film includes a degreasing and recycling device 1, a preheating device 11, a stretching device 12, and a high-temperature setting device 13. The degreasing and recycling device 1 consists of a degreasing device 2 and a circulating cooling water heat exchange device 3. The circulating cooling water heat exchange device 3 is located above the degreasing device 2, and its water flow path is arranged in the opposite direction to the hot air flow direction of the degreasing device 2, which significantly improves the heat exchange efficiency.

[0023] The degreasing and recycling equipment 1 is equipped with a constant tension unwinding device 6 on its side. The constant tension unwinding device 6 is equipped with a control box 10 on its top. The constant tension unwinding device 6 is driven by a servo motor. The control box 10 integrates a PLC module.

[0024] The stretching device 12 is set between the preheating device 11 and the high-temperature setting device 13. The preheating device 11 is set on one side of the degreasing and recycling device 1. Several heating rollers 4 are installed in the degreasing device 2, the preheating device 11, the stretching device 12 and the high-temperature setting device 13. The surface of the heating rollers 4 is coated with a high-temperature resistant coating to ensure that the film is heated evenly.

[0025] The constant tension unwinding device 6 has an oil-water separation tank 9 on its side. The oil-water separation tank 9 is equipped with multiple layers of stainless steel filter screens. The recovered grease is directly reused in the degreasing process. The circulating cooling water heat exchange device 3 is connected to a liquid delivery pipe 8, which is connected to the oil-water separation tank 9.

[0026] The film preform is fed into the degreasing and recovery equipment 1 through the constant tension unwinding device 6. In the degreasing device 2, the film preform is heated by the heating roller 4 to make the oil vapor evaporate. Then, the oil vapor is condensed into oil droplets by the circulating cooling water heat exchange device 3. The oil droplets are then transported to the oil-water separation tank 9 through the liquid delivery pipe 8 to collect the oil droplets and achieve the purpose of recovery.

[0027] In a specific implementation, a cooling device 5 is provided on the side of the high-temperature setting equipment 13, and a constant tension winding device 7 and a correction device 14 are provided on the side of the cooling device 5. The correction device 14 is installed on the constant tension winding device 7. The cooling device 5 adopts a combination of air cooling and water cooling mode, and the correction device 14 ensures neat winding.

[0028] After the film preform undergoes the degreasing and recycling process, the degreased polytetrafluoroethylene film enters the preheating equipment 11 to preheat the film. After preheating, it enters the stretching equipment 12 to stretch the film. After stretching, it enters the high-temperature setting equipment 13 for high-temperature setting. After high-temperature setting, the film enters the cooling device 5 for cooling. After cooling, the film is wound up by the constant tension winding device 7. During winding, the deviation correction device 14 is set to correct the deviation, ensuring that the film is wound neatly on one side.

[0029] In practical use, the film preform is fed into the degreasing and recycling equipment 1 through the constant tension unwinding device 6. In the degreasing device 2, the film preform is heated by the heating roller 4 to evaporate the oil and gas. Then, the oil and gas are condensed into oil droplets by the circulating cooling water heat exchange device 3. The oil droplets are then transported to the oil-water separation tank 9 through the liquid delivery pipe 8 to collect the oil droplets and achieve the purpose of recycling. After the film preform has gone through the degreasing and recycling process, the degreased polytetrafluoroethylene film enters the preheating device 11 to preheat the film. After preheating, it enters the stretching device 12 to stretch the film. After stretching, it enters the high temperature setting device 13 for high temperature setting. After high temperature setting, the film enters the cooling device 5 for cooling. After cooling, the film is wound by the constant tension winding device 7. During winding, the deviation correction device 14 is set to correct the deviation, ensuring that the film is wound neatly on one side, thus completing the entire processing procedure.

[0030] This invention combines existing PTFE film degreasing and recycling equipment with PTFE film preheating, stretching, and high-temperature setting equipment. By integrating parts of the two devices, the film retains the high temperature from the degreasing process and then directly enters the preheating, stretching, and high-temperature setting equipment, eliminating some repetitive processes. This combination not only saves on the structural components of two separate devices, reducing equipment costs, but also effectively improves the processing efficiency of PTFE film. Through integrated design, the repeated heating steps are eliminated, and the film directly enters subsequent processes after degreasing while retaining residual heat. Actual measurements show a significant reduction in energy consumption, a marked shortening of the processing cycle, and an effective increase in yield.

[0031] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these specific embodiments are merely illustrative. Those skilled in the art can omit, substitute, and modify the details of the above methods and systems in various ways without departing from the principles and essence of this utility model. For example, combining the above method steps to perform substantially the same function and achieve substantially the same result according to substantially the same method falls within the scope of this utility model. Therefore, the scope of this utility model is defined only by the appended claims.

Claims

1. A polytetrafluoroethylene (PTFE) film degreasing and recycling, preheating, stretching, and high-temperature setting integrated machine, comprising a degreasing and recycling device (1), a preheating device (11), a stretching device (12), and a high-temperature setting device (13), characterized in that, The degreasing and recycling equipment (1) consists of a degreasing device (2) and a circulating cooling water heat exchange device (3). The circulating cooling water heat exchange device (3) is located above the degreasing device (2). The stretching device (12) is located between the preheating device (11) and the high-temperature shaping device (13). The preheating device (11) is located on one side of the degreasing and recycling equipment (1). Several heating rollers (4) are installed in the degreasing device (2), the preheating device (11), the stretching device (12), and the high-temperature shaping device (13).

2. The integrated machine for degreasing, recycling, preheating, stretching, and high-temperature setting of polytetrafluoroethylene film according to claim 1, characterized in that, The degreasing and recycling equipment (1) is provided with a constant tension unwinding device (6) on its side. A control box (10) is installed on the top of the constant tension unwinding device (6). The constant tension unwinding device (6) is driven by a servo motor. The control box (10) integrates a PLC module.

3. The PTFE film degreasing recovery, preheating stretching and high temperature setting integrated machine according to claim 2, characterized in that, The constant tension unwinding device (6) is provided with an oil-water separation tank (9) on its side. The circulating cooling water heat exchange device (3) is connected to a liquid delivery pipe (8). The liquid delivery pipe (8) is connected to the oil-water separation tank (9). The oil-water separation tank (9) is provided with multiple layers of stainless steel filter screen.

4. The integrated machine for degreasing and recycling, preheating, stretching, and high-temperature setting of polytetrafluoroethylene film according to claim 1, characterized in that, The high-temperature setting equipment (13) is provided with a cooling device (5) on its side. The cooling device (5) is provided with a constant tension winding device (7) and a correction device (14) on its side. The correction device (14) is installed on the constant tension winding device (7). The cooling device (5) adopts a combination of air cooling and water cooling.

5. The integrated machine for degreasing and recycling, preheating, stretching, and high-temperature setting of polytetrafluoroethylene film according to claim 1, characterized in that, The internal water flow path of the circulating cooling water heat exchange device (3) is arranged in the opposite direction to the hot air flow direction of the degreasing device (2).

6. The integrated machine for degreasing and recycling, preheating, stretching, and high-temperature setting of polytetrafluoroethylene film according to claim 1, characterized in that, The surface of the heating roller (4) is coated with a high-temperature resistant coating.

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