Dust-free high-flexibility polytetrafluoroethylene flat drag chain cable sheath

Abstract

The utility model discloses a dust-free high-flexibility polytetrafluoroethylene flat drag chain cable sheath. The utility model discloses a dust-free and high-flexibility polytetrafluoroethylene flat drag chain cable sheath, and aims to provide a dust-free and high-flexibility polytetrafluoroethylene flat drag chain cable sheath which is light in weight, good in fatigue and bending resistance, good in weather resistance, long in service life and suitable for high-precision and advanced equipment. The utility model relates to a flat cable drag chain cable sheath, which is characterized in that two pieces of polytetrafluoroethylene bulky thin film materials are oppositely combined, the two pieces of polytetrafluoroethylene bulky thin film materials are fused and bonded together at intervals, and a plurality of channels which are arranged side by side, are separated from each other and are provided with intervals are formed at non-fusion bonding positions, so that the flat cable drag chain cable sheath is formed. And the plurality of channels are used for the cables to respectively penetrate, so that the cables are protected and separated from one another.

Description

Technical Field

[0001] The utility model relates to a drag chain cable, in particular to a dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath. Background Art

[0002] With the development of modern manufacturing, the use of drag chain cables is becoming more and more common in industrial electronic systems, automatic production lines, storage equipment, robots, fire protection systems, cranes, CNC machine tools and metallurgical industries. It is a highly flexible special cable that can move back and forth with the drag chain without being easily worn. For printers, photolithography machines, robots, etc., the transmission of electrical signals to mobile working devices through drag chain cables puts forward higher requirements. In order to arrange a large number of cables in an orderly manner without getting entangled with each other, and to protect the cables, the cables are usually arranged in an orderly manner, and the sheath wrapped around the cables is used to fix the cables together and protect them. The requirements for the sheath used on the drag chain cable are: light weight, wear resistance, high softness, bending resistance, and long service life. Although there are many drag chain cables on the market, many cannot meet all the above requirements. For example, the utility model CN115216121A discloses a high wear-resistant drag chain cable material and a preparation method thereof, which is prepared from TPEE, PEEK, modified natural rubber, chlorinated polyethylene, modified polycarbonate, multi-grade nano-silicon dioxide particles, compatibilizer, carbon black, cross-linking agent, accelerator, coupling agent, nano-antimony trioxide, and nano-aluminum hydroxide. For example, utility model CN113096858A discloses a wear-resistant and pressure-resistant cable for drag chains and a preparation method thereof. The wear-resistant and pressure-resistant cable for drag chains includes a cable core, the outer surface of the cable core is wrapped with a conductor layer, the outer surface of the conductor layer is provided with an insulating layer, the outer surface of the insulating layer is bonded with a heat insulating layer, the outer surface of the heat insulating layer is bonded with a wear-resistant and pressure-resistant layer, and the wear-resistant and pressure-resistant cable for drag chains and its preparation method improve the wear resistance and pressure resistance of the cable by adding ceramic powder, corrosion inhibitor, silicon oxide, antimony trioxide and nano barium titanate and other substances. Similar utility models have complex processes, heavy outer sheaths, poor fatigue bending resistance, and are not suitable for use in the dust-free environment of current high-precision equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath which is light in weight, good in fatigue resistance and bending resistance, good in weather resistance and long in service life and suitable for use in high-precision equipment.

[0004] In order to meet the above technical requirements, the technical solution adopted by the utility model is characterized in that it is composed of two pieces of polytetrafluoroethylene bulky film materials, and the two pieces of polytetrafluoroethylene bulky film are melt-bonded together at intervals, and a plurality of channels separated and spaced between the two pieces are formed at the non-melt-bonded position to form a flat cable drag chain cable sheath, and these multiple channels are used for the separate insertion of cables, so as to protect the cables and separate them from each other.

[0005] The width of the fusion bond is 1-2 mm.

[0006] The thickness of the polytetrafluoroethylene bulky film is 0.2-0.3 mm.

[0007] The dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath manufactured according to the above scheme has the characteristics of easy manufacturing because the polytetrafluoroethylene bulky film material is made of polytetrafluoroethylene material. The material used retains its corrosion resistance, high and low temperature resistance, flame retardancy, and is less prone to aging than other plastics. After being made into a wide polytetrafluoroethylene film, it is degreased and stretched to make the wide polytetrafluoroethylene film have a microporous bulky structure, and its specific gravity and thickness are further reduced to form a softer polytetrafluoroethylene bulky film. Then, it is cut and overlapped according to the size requirements of the flat drag chain cable sheath to make a dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath suitable for use on current high-precision equipment. In addition, since the total thickness of the flat drag chain cable sheath (the thickness after the cable is passed through) is smaller than the outer diameter of the round drag chain cable sheath, its bending section modulus W1 is much smaller than the bending section modulus W2 of the commonly used round drag chain cable sheath, so when the drag chain cable sheath is bent, the tensile stress or compressive stress of the outer layer material of the flat drag chain cable sheath is much smaller than the tensile stress or compressive stress of the round drag chain cable sheath. Therefore, the cyclic bending service life of the flat drag chain cable sheath is much better than that of the round drag chain cable sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Front view of the dust-free, highly flexible PTFE flat drag chain cable sheath.

[0009] Figure 2 yes Figure 1 The enlarged view of the AA section in the figure;

[0010] Figure 3 This is a cross-sectional view of the cable after it is inserted into the channel of the dust-free and highly flexible PTFE flat drag chain cable sheath.

[0011] In the picture: 1. PTFE bulky film; 2. Channel; 3. Cable; 4. Dust-free and highly flexible PTFE flat drag chain cable sheath. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments.

[0013] Figure 1 , Figure 2 This is a schematic diagram of the structure of a dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath. As can be seen from the figure, it is composed of two pieces of polytetrafluoroethylene bulky film 1 material, and the two pieces of polytetrafluoroethylene bulky film 1 are melt-bonded together at intervals to form a plurality of channels 2 separated and spaced between the two pieces side by side to form a flat cable drag chain cable sheath. These multiple channels 1 are used for the separate insertion of cables 3, which protects and separates the cables from each other. The width B of the melt-bonded layer is 1-2 mm. The thickness of the polytetrafluoroethylene bulky film 1 is 0.2-0.3 mm, and the number of channels 2 is determined according to the number of cables 3 inserted. The structure after the cables 3 are inserted into the channels 2 of the dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath 4 is as shown Figure 3 shown.

[0014] The manufacturing method of dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath is as follows:

[0015] (1) Mixing of raw materials: Using polytetrafluoroethylene dispersion resin powder as raw material, first sieve the polytetrafluoroethylene dispersion resin powder to obtain a particle size of 30-60 μm; adding 15-25% of aviation kerosene by weight of the raw material to the raw material and stirring to fully mix the two to form a mixture; adding the mixture to a sealed container, heating it to 50-70° C., and keeping it warm for 2.5-3.5 hours to soften the mixture into a paste-like material;

[0016] (2) Preparation of blanks: at 20-30°C, the material is placed in a blanking machine and pressed into a cylindrical blank;

[0017] (3) Extrusion and forming: the blank is placed in an extruder and extruded into a wide polytetrafluoroethylene film with a thickness of 0.4-0.6 mm at a temperature of 40-60° C. and a compression ratio of 1:700;

[0018] (4) Degreasing and stretching: Degreasing the wide polytetrafluoroethylene film in an oven at 280-320°C to remove the aviation kerosene, and stretching the wide polytetrafluoroethylene film in this environment to a length of 2.5-3 times the length before stretching, so that the wide film is bulky and the specific gravity is reduced, and the thickness is 0.2-0.3 mm, thus forming a wide polytetrafluoroethylene bulky film;

[0019] (5) Cutting: According to the specifications of the cable sheath, the wide-width polytetrafluoroethylene bulky film is cut to the required length and width to make the polytetrafluoroethylene bulky film 1 for the cable sheath;

[0020] (6) Compounding: Two pieces of polytetrafluoroethylene bulky films 1 are overlapped and matched, and passed through a set of rollers heated at 240-300°C, wherein the width B of the rollers at the rolling extrusion position is 1-2 mm. Through the rolling extrusion of the rollers, the two pieces of polytetrafluoroethylene bulky films between the rollers are melted and bonded together at the rolling extrusion position, and multiple channels 2 are formed at the non-melting bonding position, where the two pieces are separated and spaced apart, and the number of channels 2 is determined according to the number of cables 3 inserted. These multiple channels 2 are used for the cables 3 to be inserted separately, and play a role in protecting and separating the cables 3 from each other.

[0021] The dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath 4 obtained in the above embodiment is inserted into the cable line 3 in its channel 2 to make a flat drag chain cable. Figure 3 As shown, the bending fatigue strength test was carried out on the linear module drag chain durability testing machine (wherein the test parameters are: acceleration time 1s, running speed 166.6mm / s, end position 485mm) and passed 10 million U-shaped cycle bending fatigue strength tests, and all were qualified.

[0022] Of course, the above examples are only preferred embodiments of the present invention, but do not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application are still within the scope of protection covered by the present invention.

Claims

1. The dust-free and highly flexible PTFE flat drag chain cable sheath is characterized by being made of two pieces of PTFE bulky film materials, which are melt-bonded together at intervals, and in the non-melt-bonded position, there are multiple channels separated and spaced between the two pieces side by side to form a flat cable drag chain cable sheath.

2. According to claim 1, the dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath is characterized in that The width of the fusion bond is 1-2 mm.

3. According to claim 1, the dust-free and highly flexible polytetrafluoroethylene flat drag chain cable sheath is characterized in that The thickness of the polytetrafluoroethylene bulky film is 0.2-0.3 mm.

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