Anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membrane

Abstract

The utility model discloses an anti-adhesion unreeling and sintering device for producing a polytetrafluoroethylene fiber membrane, which comprises an unreeling mechanism and a sintering mechanism, the unreeling mechanism comprises a membrane unreeling front support roller, a slide rail, a membrane separating plate and a membrane unreeling rear support roller; the sintering structure comprises a sintering box body and a plurality of heating roll shafts horizontally arranged in the box body, and a feeding port and a discharging port are formed in the two ends of the sintering box body respectively. The film unwinding front supporting roller and the sliding rail are arranged at the same horizontal height, and one end of the film separating plate is arranged in the sliding rail in a sleeved mode and connected with the sliding rail in a sliding mode. And a film unwound by the unwinding mechanism enters the sintering mechanism through the feeding hole, is wound on the plurality of heating roller shafts and then is wound out from the discharging hole. According to the anti-adhesion unwinding and sintering device, the oil removal effect during unwinding is improved, the problems that in the PTFE fiber unwinding process, due to adhesion, the structure of a fiber material in subsequent processing is damaged, and the fiber performance is reduced can be solved, and the production efficiency and the yield are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polytetrafluoroethylene fiber production equipment, in particular to an anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membranes. Background Art

[0002] Polytetrafluoroethylene (PTFE) is a synthetic polymer material in which all hydrogen atoms in polyethylene are replaced by fluorine atoms, commonly known as the "King of Plastics". Polytetrafluoroethylene fiber was originally developed by DuPont in the United States and is the earliest industrialized special synthetic fiber. Its varieties include monofilament, multifilament, short fiber and split film fiber, which are particularly suitable for fields with high requirements for heat resistance and chemical corrosion resistance.

[0003] Due to the unique physical and chemical properties of PTFE, polytetrafluoroethylene fibers are not suitable for preparation by conventional solution spinning or melt spinning methods, and the preparation of polytetrafluoroethylene fibers by film splitting is one of the most common spinning processes on the market. The main process flow is to first mix polytetrafluoroethylene dispersed powder with an extrusion aid to obtain a paste, then place the paste in an environment of about 25°C for a period of time, and then process the paste after standing to obtain a sintered film through preforming, extrusion molding, calendering and hot stretching processes, and then use a rigid needle roller to comb the sintered film to split it to form PTFE film split fibers.

[0004] Patents CN115323527A and CN113122950B disclose methods for preparing polytetrafluoroethylene fibers, both of which involve preforming, extrusion and calendering to prepare sintered films, as well as degreasing, hot stretching and film cracking processes for the sintered films. However, during the unwinding process of the polytetrafluoroethylene film in degreasing and hot stretching, due to the presence of oil additives, the film material is prone to adhesion, resulting in uneven feeding, and there are slight differences in the thickness of the polytetrafluoroethylene film. Subsequent processing easily destroys the structure of the polytetrafluoroethylene fiber material, resulting in reduced fiber performance. In addition, in actual process production, due to the influence of the oil, the polytetrafluoroethylene film inside and outside the roll is prone to adhesion, and the adhesion film is usually manually opened by the operator, which easily aggravates the problem of many impurities inside the fiber. For this reason, it is necessary to develop a sintered film anti-adhesion unwinding device for producing polytetrafluoroethylene fibers, which can solve the problem of uneven thickness and low yield of the fiber film produced due to the easy adhesion of PTFE fibers during the unwinding process. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membranes, in order to improve the oil removal effect during unwinding, improve the problem of subsequent fiber material structure damage and fiber performance reduction caused by adhesion during the PTFE fiber unwinding process, and improve production efficiency and yield rate.

[0006] In order to achieve the above-mentioned object, the utility model provides an anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membrane, characterized in that the device comprises an unwinding mechanism and a sintering mechanism:

[0007] Wherein, the unwinding mechanism comprises an unwinding bracket, and the unwinding bracket is vertically arranged;

[0008] The film unwinding front support roller is arranged horizontally with the ground, and one end of the roller shaft is fixedly connected to the unwinding bracket, and is used to place the polytetrafluoroethylene film roll;

[0009] A slide rail is fixedly arranged on the unwinding bracket and is arranged to be parallel to the ground and perpendicular to the roller shaft of the supporting roller before the film unwinding, and the slide rail and the roller shaft of the supporting roller before the film unwinding are at the same height;

[0010] The film separation plate is configured as a wedge-shaped body with the tip facing downward, one end of which is slidably connected to the slide rail so that it can slide horizontally along the slide rail to separate the films that are adhered to the inside and outside of the unwinding film.

[0011] The film is unwound and supported by a roller, one end of which is fixedly connected to the unwinding bracket;

[0012] The sintering mechanism comprises a sintering box;

[0013] A feed inlet, which is provided on the surface of the sintering box body close to the unwinding mechanism;

[0014] A discharge port is provided on a surface of the sintering box away from the unwinding mechanism;

[0015] A heating assembly, which includes 6 heating rollers, one end of which is fixedly connected to the inner wall of the sintering box and has the same orientation as the supporting roller before the film is unwound;

[0016] Among them, the heating rollers are divided into two rows, upper and lower, and are marked as the first to sixth heating rollers from top to bottom. The height of the first heating roller on the upper left is the same as the feed port, and the height of the sixth heating roller on the lower right is the same as the discharge port.

[0017] Preferably, the film separating plate may also be configured as an arc-shaped plate that is bent toward the roller axis direction of the supporting roller before the film is unwound.

[0018] Preferably, a tension spring is further provided in the above-mentioned slide rail, one end of the tension spring is fixed on the slide rail, and the other end is fixedly connected to the film separating plate.

[0019] Preferably, the number of the above-mentioned heating rollers can be 4 or 8, so as to complete the sintering of the film.

[0020] The utility model has the following advantages:

[0021] The utility model can effectively separate the film which is adhered inside and outside during unwinding and sintering process of polytetrafluoroethylene film, prevent unwinding adhesion, make the feeding more uniform during film sintering, effectively alleviate the problems of structural damage of fiber material and reduction of fiber performance in subsequent processing, and can significantly improve the production efficiency and yield rate of polytetrafluoroethylene fiber film in combination with sintering film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a main structural diagram of the anti-adhesion unwinding and sintering device of the utility model.

[0023] Figure 2 It is a top view of the structure of the anti-adhesion unwinding and sintering device of the utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] This embodiment provides an anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membranes, referring to Figure 1 and Figure 2 The device comprises an unwinding mechanism and a sintering mechanism, wherein the unwinding mechanism comprises an unwinding bracket 1, the unwinding bracket 1 is vertically arranged, the film unwinding front support roller 2 is horizontally arranged with the ground, one end of its roller shaft is fixedly connected to the unwinding bracket 1, and is used to place the polytetrafluoroethylene film roll; a slide rail 3 is fixedly arranged on the unwinding bracket 1, which is arranged parallel to the ground and perpendicular to the roller shaft of the film unwinding front support roller 2, and the slide rail 3 is at the same height as the roller shaft of the film unwinding front support roller 2; a film separating plate 4, which is a wedge-shaped body with a pointed end facing downward, one end of which is slidably connected to the slide rail 3, so that it can slide horizontally along the slide rail 3, and is used to separate the film adhered inside and outside the unwinding during the film unwinding. The film is unwound after the support roller 5, one end of the roller shaft of which is fixedly connected to the unwinding bracket 1; the sintering mechanism comprises a sintering box 7, and a feed port 6 and a discharge port 8 are respectively provided on the two surfaces of the sintering box 7 close to and away from the unwinding mechanism; a heating component comprises 6 heating roller shafts, one end of the shaft body of the heating roller shaft is fixedly connected to the inner wall of the sintering box 7, and has the same orientation as the support roller 2 before the film is unwound, and the heating roller shafts are divided into two rows, upper and lower, and are marked as the first to sixth heating roller shafts from top to bottom, wherein the height of the first heating roller shaft on the upper left is the same as the feed port, and the height of the sixth heating roller shaft on the lower right is the same as the discharge port 8.

[0027] The working method of the utility model is as follows: a polytetrafluoroethylene film roll is placed on the film unwinding front support roller 2 for counterclockwise unwinding, a film separation plate 4 is slidably placed on the separation position of the unwound film and the film roll through a slide rail 3, the unwound film then passes through the film unwinding rear support roller 5, enters the sintering box 7 from the feed port 6, is respectively wound on the heating roller shaft for sintering and heating, and finally is wound out from the discharge port 8 to complete unwinding and sintering.

[0028] According to a specific embodiment of the present invention, the film separation plate 4 can also be configured as an arc-shaped plate that is bent toward the roller axis direction of the supporting roller 2 before the film is unwound.

[0029] According to a specific embodiment of the utility model, a tension spring is arranged in the above-mentioned slide rail 3, one end of the tension spring is fixed on the slide rail, and the other end is fixedly connected to the film separating plate 4.

[0030] According to a specific embodiment of the utility model, the above-mentioned heating rollers can also be provided with 4 or 8, so as to complete the sintering of the film.

[0031] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. An anti-adhesion unwinding and sintering device for producing polytetrafluoroethylene fiber membrane, characterized in that: The device includes unwinding mechanism and sintering mechanism: Wherein, the unwinding mechanism comprises an unwinding bracket (1), and the unwinding bracket (1) is arranged vertically; A film unwinding front support roller (2), which is arranged horizontally with the ground, and one end of the roller shaft is fixedly connected to the unwinding support (1), and is used to place the polytetrafluoroethylene film roll; A slide rail (3) fixedly arranged on the unwinding support (1) and arranged to be parallel to the ground and perpendicular to the roller axis of the film unwinding front support roller (2), and the slide rail (3) and the roller axis of the film unwinding front support roller (2) are at the same height; The film separation plate (4) is configured as a wedge-shaped body with the tip facing downward, one end of which is slidably connected to the slide rail (3) so that it can slide horizontally along the slide rail (3) and is used to separate the films that are adhered to the inside and outside of the unwinding film. A film unwinding rear support roller (5), one end of the roller shaft of which is fixedly connected to the unwinding support (1); The sintering mechanism comprises a sintering box (7); A feed port (6) is provided on a surface of the sintering box (7) close to the unwinding mechanism; A discharge port (8) is arranged on a surface of the sintering box (7) away from the unwinding mechanism; A heating assembly, comprising six heating rollers, one end of the shaft of each heating roller being fixedly connected to the inner wall of the sintering box (7) and oriented in the same direction as the supporting roller (2) before the film is unwound; Among them, the heating rollers are divided into two rows, one above the other, and are marked as the first to sixth heating rollers from top to bottom, wherein the height of the first heating roller on the upper left is the same as the feed port, and the height of the sixth heating roller on the lower right is the same as the discharge port (8).

2. The anti-adhesion unwinding and sintering device according to claim 1, characterized in that: The film separation plate (4) is configured as an arc-shaped plate that is bent in the direction of the roller axis of the supporting roller (2) before the film is unwound.

3. The anti-adhesion unwinding and sintering device according to claim 1 or 2, characterized in that: A tension spring is arranged in the slide rail (3), one end of the tension spring is fixed on the slide rail (3), and the other end is fixedly connected to the film separation plate (4).

4. The anti-adhesion unwinding and sintering device according to claim 1, characterized in that: The number of the heating rollers may be 4 or 8.

5. The anti-adhesion unwinding and sintering device according to claim 2, characterized in that: The number of the heating rollers may be 4 or 8.

6. The anti-adhesion unwinding and sintering device according to claim 3, characterized in that: The number of the heating rollers may be 4 or 8.

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