CN116646126B - Processing method of spiral cable with self-memory rebound function and product thereof - Google Patents

Processing method of spiral cable with self-memory rebound function and product thereof Download PDF

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Publication number
CN116646126B
CN116646126B CN202310717405.6A CN202310717405A CN116646126B CN 116646126 B CN116646126 B CN 116646126B CN 202310717405 A CN202310717405 A CN 202310717405A CN 116646126 B CN116646126 B CN 116646126B
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cable
self
spiral cable
spiral
core
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CN116646126A (en
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王波
潘常青
安东辉
梁刚
邱昕
尚喜平
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Shenzhen Testeck Cable Co ltd
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Shenzhen Testeck Cable Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/008—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing extensible conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0036—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H01B13/0207—Details; Auxiliary devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H01B3/427—Polyethers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/06—Extensible conductors or cables, e.g. self-coiling cords
    • H01B7/065—Extensible conductors or cables, e.g. self-coiling cords having the shape of an helix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame

Abstract

The invention relates to the technical field of H01B13/00, in particular to a processing method of a spiral cable with a self-memory rebound function and a product thereof, which at least comprises the following steps: (1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, and cladding the polyether-ether-ketone material on the internal core wire through melt extrusion to form an insulating core wire coated with a polyether-ether-ketone insulating outer layer; (2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths; (3) Coiling the cable with a winding rod to form, and shaping the coiled cable into a spiral cable at high temperature through an oven; (4) And cooling the shaped spiral cable by using cooling oil, and then reversely winding to obtain the spiral cable with the self-memory rebound function, wherein the product prepared by matching the optimized processing technology with specific materials meets the actual use requirement of the coal mine gas explosion-proof gas detection instrument.

Description

Processing method of spiral cable with self-memory rebound function and product thereof
Technical Field
The invention relates to the technical field of H01B13/00, in particular to a processing method of a spiral cable with a self-memory rebound function and a product thereof.
Background
The rebound spiral cable is a device connecting wire which works by utilizing scalability and comprises an insulating core wire, a cable core and a cable sheath coated on the periphery of the cable core, and can rebound rapidly in a short time, and is mainly used for controlling the electric connection of the movement of movable devices, and is widely applied to movable devices such as automobiles, machines, meters and the like.
The cable sheath material commonly used at present mainly comprises polyvinyl chloride and polyethylene, the traditional polyethylene spiral cable needs to be extruded firstly and then heated to a temperature above the decomposition temperature of the polyethylene to carry out crosslinking reaction to form a cable, and then the cable is coiled and shaped into a threaded cable through coiling equipment. The polyvinyl chloride spiral cable processed by the traditional method generally loses the due rebound performance of the spiral cable after being stretched 500 times, has shorter service life and cannot meet the actual use requirement of the coal mine gas explosion-proof gas detection instrument. The Chinese patent application (patent publication No. CN 104319017A) provides a novel processing method of an environment-friendly high-elasticity spiral cable, which mainly uses thermoplastic polyurethane elastomer and polyvinyl chloride as resin matrixes, and uses a stabilizer and other raw materials to obtain a cable material, and the cable material is coated on a core wire through an extruder to form a cable, so that the cable material has certain improvement on the tensile strength and contractility of the conventional PVC spiral cable, but has higher requirements on various aspects, especially in the field of coal mine gas explosion-proof gas detection instruments with higher rebound resilience requirements, the use requirement cannot be effectively met, and the use of the polyvinyl chloride is unfavorable for environment protection.
Disclosure of Invention
In order to solve the problems, the invention provides a processing method of the spiral cable with the self-memory rebound function, and the processing technology is optimized to be matched with specific materials, so that the simple and efficient preparation of the spiral cable meeting the actual use requirements of the coal mine gas explosion-proof gas detection instrument is realized, and the processing method has high market popularization value.
The invention provides a processing method of a spiral cable with a self-memory rebound function, which at least comprises the following steps:
(1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, and cladding the polyether-ether-ketone material on the internal core wire through melt extrusion to form an insulating core wire coated with a polyether-ether-ketone insulating outer layer;
(2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths;
(3) Coiling the cable with a winding rod to form, and shaping the coiled cable into a spiral cable at high temperature through an oven;
(4) And cooling the shaped spiral cable by using cooling oil, and then reversely winding to obtain the spiral cable with the self-memory rebound function.
As a preferable technical scheme, the control pitch diameter ratio of the copper wire conductor is 5-7; the thickness of the polyether-ether-ketone insulating outer layer is 0.15-0.2mm; preferably, the control pitch diameter ratio of the copper wire conductor is 6; the thickness of the polyether-ether-ketone insulating outer layer is 0.15-0.2mm.
As a preferable technical scheme, the melt extrusion is specifically performed by adopting a tube extrusion die, the temperature of the melt extrusion is 350-360 ℃, the linear speed of the melt extrusion is 30m/min, and the tube extrusion die is made of nickel-based superalloy GH113.
As a preferable technical solution, the polyetheretherketone material is at least one selected from PEEK KT851, PEEK KT850, PEEK KT820NT, PEEK KT880NT, and PEEK KT880NL, and is preferably PEEK KT851.
Preferably, referring to fig. 1-3, the pipe extrusion die consists of a die core and a die sleeve, wherein the die core and the die sleeve are on the same axis horizontal plane, and a gap of 0.15-0.2mm is reserved between the die core and the die sleeve.
The mold core consists of a mold core body and an internal core wire channel; the mold core body comprises a thin part with the length of 12mm, an inclined part with the length of 22mm and a thick part with the length of 36 mm; the inner core wire channel comprises a large-hole channel part with the diameter of 5mm and the length of 45mm and a small-hole channel part with the diameter of 1.5mm and the length of 25mm, wherein the large-hole channel part and the small-hole channel part adopt a 45-degree angle for transition.
The die sleeve consists of a die sleeve body and an extrusion channel, wherein the extrusion channel comprises an extrusion head part with the length of 12mm and an extrusion tail part with the length of 10 mm.
According to the processing method provided by the invention, the conventional method is adopted for extrusion, and the preparation of the polyether-ether-ketone insulating outer layer with the thickness of 0.15-0.2mm is difficult to realize, so that the flexibility of the polyether-ether-ketone insulating outer layer cannot be ensured, the material is easy to waste, and the whole production cost is higher due to the very high price of the polyether-ether-ketone material. The inventor finds that in the practical research process, the preparation of the insulating core wire coated with the polyether-ether-ketone insulating outer layer with the thickness of 0.15-0.2mm at the melt extrusion linear speed of 30m/min is realized by adopting the extrusion pipe type die shown in the figures 1-3 and matching with PEEK KT851, and the extrusion is stable; under the specific pitch diameter ratio range, the prepared cable has high flexibility and tensile strength, high production efficiency, excellent performance of the prepared polyether-ether-ketone insulating outer layer and high quality qualification rate. The inventors analyzed the cause may be: through the cooperation of mold core and die sleeve in the design mould, mold core and die sleeve are on same axle center horizontal plane, reserve 0.15-2mm clearance between the two to the accurate control of polyether ether ketone insulating skin wall thickness when realizing extruding, PEEK KT851 has higher smoothness when the extrusion tubular mould that passes through after the melting and the polyether ether ketone insulating skin that obtains has the comprehensive properties that satisfies the requirement, effectively avoids the waste that high-cost PEEK KT851 molten material remains in the mould simultaneously and leads to.
As a preferred embodiment, the thermoplastic polyurethane elastomer material is at least one selected from 1185a12WM, 1185a10M, 1175a10W, 1185a10, preferably 1185a12WM;
as a preferable technical scheme, the cable control pitch diameter ratio is 6-10; the thickness of the TPU sheath is 0.6-0.8mm; preferably, the cable control pitch diameter ratio is 8; the thickness of the TPU sheath is 0.6-0.8mm.
Preferably, the temperature of the drying treatment is 120-150 ℃ and the time is 3-5h.
Preferably, the extrusion temperature of the extruder is 200-210 ℃ and the extrusion speed is 30m/min.
Preferably, the high-temperature setting temperature is 100-120 ℃ and the time is 90-150min.
Preferably, the cooling temperature is 15-25 ℃ and the cooling time is 30-90min.
Preferably, the reverse winding specifically comprises: and (5) unwinding the cooled cable, and reversely winding the cable into a shape by using a winding rod according to the same winding density.
According to the method provided by the invention, the cable coated with the TPU sheath with the thickness of 0.6-0.8mm is prepared by adopting 1185A12WM by controlling the process conditions, and the cable is coated again on the polyether-ether-ketone insulating outer layer, so that the provided cable has excellent scratch and wear resistance and flame retardance and fireproof performance. Further, under the specific copper wire conductor pitch diameter ratio and the specific cable pitch diameter ratio, the coiled and molded cable is subjected to high-temperature shaping at 100-120 ℃ for 90-150min, then cooled for 30-90min by adopting cooling oil at 15-25 ℃, and then is unwound for reverse winding, so that the prepared spiral cable has good contractility and stretching resistance, can still keep good stretching performance after being stretched 10000-15000 times, can recover to the original length in the former 10000 times, has a self-memory function, and integrally realizes the preparation of the spiral cable with high service life.
The polyether-ether-ketone material and the thermoplastic elastomer adopted by the invention can not generate dioxin generated by polybrominated diphenyl and brominated diphenyl ether in the production and use processes, can not pollute the atmosphere, are more environment-friendly, have very low smoke density in the cable combustion process, and play a role in protecting the life safety of people. Further, the polyether-ether-ketone material PEEK KT851 is adopted to coat the inner core wire and matched with the outer TPU sheath, so that the provided spiral cable can be normally used in a wide temperature range environment of-60 ℃ to 200 ℃, the use requirements of coal mine gas explosion-proof gas detection instruments in different areas are met, and meanwhile, the working voltage of 0.6/1KV of the whole cable is realized.
The invention further provides a spiral cable with a self-memory rebound function, which consists of a TPU sheath coated cable core; the cable core is formed by twisting insulating core wires, and the insulating core wires are formed by coating inner core wires with polyether-ether-ketone insulating outer layers.
Advantageous effects
1. The invention provides a processing method of a spiral cable with a self-memory rebound function, which realizes simple and efficient preparation of the spiral cable meeting the actual use requirement of a coal mine gas explosion-proof gas detection instrument by optimizing a processing technology and matching with specific materials, and has high market popularization value.
2. The preparation of the insulating core wire coated with the polyether-ether-ketone insulating outer layer with the thickness of 0.15-0.2mm is realized by adopting the extrusion pipe type die shown in the figures 1-3 and matching with PEEK KT851, the preparation of the insulating core wire coated with the polyether-ether-ketone insulating outer layer with the thickness of 0.15-0.2mm at the melt extrusion linear speed of 30m/min is realized, and the extrusion is stable.
3. According to the method provided by the invention, the cable coated with the TPU sheath with the thickness of 0.6-0.8mm is prepared by adopting 1185A12WM by controlling the process conditions, and the cable is coated again on the polyether-ether-ketone insulating outer layer, so that the provided cable has excellent scratch and wear resistance and flame retardance and fireproof performance.
4. According to the processing method provided by the invention, under the conditions of specific copper wire conductor pitch diameter ratio and cable pitch diameter ratio, the coiled cable is subjected to high-temperature shaping at 100-120 ℃ for 90-150min, cooled for 30-90min by adopting cooling oil at 15-25 ℃, and then is unwound for reverse coiling, so that the prepared spiral cable has good contractility and tensile resistance, can still keep good contractility after 10000-15000 times of stretching, can recover to the original length in the former 10000 times, has a self-memory function, and is integrally realized for preparing the spiral cable with high service life.
5. The invention adopts the PEEK KT851 to coat the inner core wire and match with the TPU sheath to coat the outer part, so that the provided spiral cable can be normally used in the environment of wide temperature range of-60 ℃ to 200 ℃, the use requirements of coal mine gas explosion-proof gas detection instruments in different areas are met, and the working voltage of 0.6/1KV of the whole cable is realized.
Drawings
FIG. 1 is a diagram showing the actual production of a tube-extruding die in example 1 of the present invention.
Fig. 2 is a schematic diagram of the die core structure of the tube extrusion die in embodiment 1 of the invention, wherein the die core structure is 1 in detail, 2 in inclined part, 3 in thick part, 4 in large hole channel part and 5 in small hole channel part.
Fig. 3 is a schematic diagram of the die sleeve structure of the tube extrusion die in example 1 of the present invention, wherein the die sleeve body 6, the extrusion tail 7 and the extrusion head 8 are shown.
Fig. 4 is a diagram of a spiral cable product prepared in example 1 of the present invention.
Fig. 5 is a comparative schematic diagram of the spiral cable flexibility test provided in example 1 and comparative example 1, in which a is example 1 and b is comparative example 1.
FIG. 6 is a graph of a scratch and mar resistance performance test instrument.
Fig. 7 is a graph showing actual flame retardant and fire resistance.
FIG. 8 is a drawing showing the practical measurement of tensile resilience.
Detailed Description
Example 1
The embodiment 1 of the invention provides a processing method of a spiral cable with a self-memory rebound function, which comprises the following steps:
(1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, and cladding the polyether-ether-ketone material on the internal core wire through melt extrusion to form an insulating core wire coated with a polyether-ether-ketone insulating outer layer;
(2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths;
(3) Coiling the cable wire with a winding rod to form, and shaping the coiled cable wire into a spiral cable at high temperature through an oven (see fig. 4);
(4) And cooling the shaped spiral cable by using ISOVG No. 10 electric insulation cooling oil, and then reversely winding to obtain the spiral cable with the self-memory rebound function.
The control pitch diameter ratio of the copper wire conductor is 6; the thickness of the polyether-ether-ketone insulating outer layer is 0.2mm.
The melt extrusion is specifically carried out by adopting a tube extrusion die, the temperature of the melt extrusion is 350 ℃, the linear speed of the melt extrusion is 30m/min, and the tube extrusion die is made of nickel-based superalloy GH113.
The polyether-ether-ketone material is PEEK KT851; referring to fig. 1-3, the pipe extrusion die consists of a die core and a die sleeve, wherein the die core and the die sleeve are arranged on the same axis horizontal plane, and a gap of 0.2mm is reserved between the die core and the die sleeve.
The mold core consists of a mold core body and an internal core wire channel; the mold core body comprises a thin part with the length of 12mm, an inclined part with the length of 22mm and a thick part with the length of 36 mm; the inner core wire channel comprises a large-hole channel part with the diameter of 5mm and the length of 45mm and a small-hole channel part with the diameter of 1.5mm and the length of 25mm, wherein the large-hole channel part and the small-hole channel part adopt a 45-degree angle for transition.
The die sleeve consists of a die sleeve body and an extrusion channel, wherein the extrusion channel comprises an extrusion head part with the length of 12mm and an extrusion tail part with the length of 10 mm.
The model of the thermoplastic polyurethane elastomer material is 1185A12WM;
the cable control pitch diameter ratio is 8; the thickness of the TPU sheath is 0.8mm.
The temperature of the drying treatment is 130 ℃ and the time is 4 hours.
The extrusion temperature of the extruder was 210℃and the extrusion speed was 30m/min.
The high-temperature setting temperature is 110 ℃ and the time is 120min.
The cooling temperature is 20 ℃ and the cooling time is 60min.
The reverse winding specifically comprises the following steps: and (5) unwinding the cooled cable, and reversely winding the cable into a shape by using a winding rod according to the same winding density.
The embodiment 1 of the invention provides a spiral cable with a self-memory rebound function, which consists of a TPU sheath and a coated cable core; the cable core is formed by twisting insulating core wires, and the insulating core wires are formed by coating inner core wires with polyether-ether-ketone insulating outer layers.
Comparative example 1
Comparative example 1 of the present invention provides a method of manufacturing a spiral cable and a product thereof, and a specific embodiment thereof is the same as example 1 in that the copper wire conductor has a control pitch diameter ratio of 12; the cable control pitch diameter ratio is 15.
Comparative example 2
Comparative example 2 of the present invention provides a method of processing a spiral cable, comprising the steps of:
(1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, and cladding the polyether-ether-ketone material on the internal core wire through melt extrusion to form an insulating core wire coated with a polyether-ether-ketone insulating outer layer;
(2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths;
(3) Coiling the cable with a winding rod to form, and shaping the coiled cable into a spiral cable at high temperature through an oven;
(4) And cooling the shaped spiral cable with cooling water to obtain the cable.
The control pitch diameter ratio of the copper wire conductor is 6; the thickness of the polyether-ether-ketone insulating outer layer is 0.2mm.
The melt extrusion is specifically carried out by adopting a tube extrusion die, the temperature of the melt extrusion is 350 ℃, and the tube extrusion die is made of nickel-based superalloy GH113.
The polyether-ether-ketone material is PEEK KT851; referring to fig. 1-3, the extrusion die is the same as in example 1.
The model of the thermoplastic polyurethane elastomer material is 1185A12WM;
the cable control pitch diameter ratio is 8; the thickness of the TPU sheath is 0.8mm.
The temperature of the drying treatment is 130 ℃ and the time is 4 hours.
The extrusion temperature of the extruder was 210℃and the extrusion speed was 30m/min.
The high-temperature setting temperature is 110 ℃ and the time is 120min.
The cooling temperature is 20 ℃ and the cooling time is 60min.
In another aspect, comparative example 2 of the present invention provides a spiral cable comprising a TPU jacket coated cable core; the cable core is formed by twisting insulating core wires, and the insulating core wires are formed by coating inner core wires with polyether-ether-ketone insulating outer layers.
Comparative example 3
Comparative example 3 of the present invention provides a method of processing a spiral cable, comprising the steps of:
(1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, extruding and coating a thermoplastic polyurethane elastomer material on the internal core wire through an extruder to form an insulating core wire coated with a thermoplastic polyurethane outer layer;
(2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths;
(3) Coiling the cable with a winding rod to form, and shaping the coiled cable into a spiral cable at high temperature through an oven;
(4) And cooling the shaped spiral cable with cooling water to obtain the cable.
The control pitch diameter ratio of the copper wire conductor is 6; the thickness of the thermoplastic polyurethane outer layer is 0.2mm.
The model of the thermoplastic polyurethane elastomer material is 1185A12WM;
the cable control pitch diameter ratio is 8; the thickness of the TPU sheath is 0.8mm.
The temperature of the drying treatment is 130 ℃ and the time is 4 hours.
The extrusion temperature of the extruder was 210℃and the extrusion speed was 30m/min.
The high-temperature setting temperature is 110 ℃ and the time is 120min.
The cooling temperature is 20 ℃ and the cooling time is 60min.
In another aspect, comparative example 3 of the present invention provides a spiral cable comprising a TPU jacket coated cable core; the cable core is formed by twisting insulating core wires, and the insulating core wires are formed by wrapping inner core wires with thermoplastic polyurethane outer layers.
Comparative example 4
Comparative example 4 of the present invention provides a method for manufacturing a spiral cable and a product thereof, and the specific embodiment of the present invention is the same as example 1, wherein the polyetheretherketone material is VICTREX PEEK 381G, the extrusion line speed is 10m/min, and the thickness of the polyetheretherketone insulating outer layer is 0.3mm.
Performance test method
1. Flexibility: the bending radius of the spiral cables provided in the examples and the comparative examples was tested, and the test results were represented by the diameter multiples of the spiral cables, and are specifically recorded in table 1; wherein the smaller the bending radius, the better the flexibility of the spiral cable, fig. 5 is a comparative schematic diagram of the flexibility test of example 1 and comparative example 1.
2. Scratch resistance: referring to FIG. 6, the scratch resistance of the spiral cables provided in examples and comparative examples was tested by referring to clause EN50305:2020- - -5.2, the needle load was 11N, the number of trips to which the spiral cable was broken was recorded, and the results are recorded in Table 1.
3. Flame retardant and fire resistance: referring to fig. 7, referring to the bundled wire cable flame vertical propagation test of GB/T18380.33-2008, the spiral cable provided in example 1 of the present invention was tested, and the test result is: a, the toxicity index is less than 5, the light transmittance is more than or equal to 70 percent, and the requirements of EN45545-2:2020 standard are met.
4. Stretch resilience: the spiral cables provided in examples and comparative examples were subjected to tensile testing using a custom-made spring wire stretching fatigue tester (see fig. 8), the spiral cable samples were continuously reciprocated by motor sprocket drive power, the number of stretching times for which the spiral cable was completely restored to the original length was recorded, and the results are recorded in table 1.
TABLE 1,
Examples Flexibility of the product Scratch resistance (round trip times) Stretch resilience (number of stretches)
Example 1 5 times cable diameter 1000 times 10000 times
Comparative example 1 10 times cable diameter 800 times 6100 times
Comparative example 2 5 times cable diameter 850 times 5500 times
Comparative example 3 10 times cable diameter 350 times 4650 times
Comparative example 4 8 times cable diameter 650 times 3300 times

Claims (9)

1. The processing method of the spiral cable with the self-memory rebound function is characterized by at least comprising the following steps of:
(1) Adopting a copper wire conductor to carry out bundle stranding to serve as an internal core wire, and cladding the polyether-ether-ketone material on the internal core wire through melt extrusion to form an insulating core wire coated with a polyether-ether-ketone insulating outer layer;
(2) Twisting the insulated core wires into cable cores, drying thermoplastic polyurethane elastomer materials, extruding and coating the cable cores through an extruder to form cables coated with TPU sheaths;
(3) Coiling the cable with a winding rod to form, and shaping the coiled cable into a spiral cable at high temperature through an oven;
(4) Cooling the shaped spiral cable with cooling oil, and then reversely winding to obtain the spiral cable with the self-memory rebound function;
the reverse winding specifically comprises the following steps: and (5) unwinding the cooled cable, and reversely winding the cable into a shape by using a winding rod according to the same winding density.
2. The method for processing the spiral cable with the self-memory rebound function according to claim 1, wherein the copper wire conductor is controlled to have a pitch diameter ratio of 5-7; the thickness of the polyether-ether-ketone insulating outer layer is 0.15-0.2mm.
3. The method for processing the spiral cable with the self-memory rebound function according to claim 2, wherein the melt extrusion is specifically extrusion by adopting an extrusion pipe type die, and the temperature of the melt extrusion is 350-360 ℃.
4. The method for processing the spiral cable with the self-memory rebound function according to claim 3, wherein the tube extruding die consists of a die core and a die sleeve, the die core and the die sleeve are arranged on the same axis horizontal plane, and a gap of 0.15-0.2mm is reserved between the die core and the die sleeve.
5. The method for processing a spiral cable with a self-memory rebound function according to claim 4, wherein the cable control pitch diameter ratio is 6-10; the thickness of the TPU sheath is 0.6-0.8mm.
6. The method for processing a spiral cable with a self-memory rebound function according to claim 5, wherein the extrusion temperature of the extruder is 200-210 ℃ and the extrusion speed is 30m/min.
7. The method for manufacturing a spiral cable with a self-memory rebound function according to claim 6, wherein the high-temperature setting temperature is 100-120 ℃ and the time is 90-150min.
8. The method for manufacturing a spiral cable with self-memory rebound function according to claim 7, wherein the cooling temperature is 15-25 ℃ and the cooling time is 30-90min.
9. A product prepared by the processing method of the spiral cable with self-memory rebound function according to any one of claims 1-8, which is characterized by comprising a cable core covered by a TPU sheath; the cable core is formed by twisting insulating core wires, and the insulating core wires are formed by coating inner core wires with polyether-ether-ketone insulating outer layers.
CN202310717405.6A 2023-06-15 2023-06-15 Processing method of spiral cable with self-memory rebound function and product thereof Active CN116646126B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024526A (en) * 2010-10-15 2011-04-20 镇江市华银仪表电器有限公司 Method for processing novel environmental-protection spiral cable with high elasticity
CN202282187U (en) * 2011-11-06 2012-06-20 远东复合技术有限公司 Twisted composite core
CN203300272U (en) * 2013-05-04 2013-11-20 安徽省康利亚实业有限公司 High-temperature and strong-radiation resistance low-noise cable capable of detecting minimal signals
CN105702328A (en) * 2016-01-19 2016-06-22 安徽省巢湖海兴电缆集团有限公司 Anti-torsion thin-wall multi-pair locomotive cable
CN105719734A (en) * 2016-01-19 2016-06-29 安徽省巢湖海兴电缆集团有限公司 High-temperature resisting type thin-wall insulation shielding type locomotive vehicle cable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024526A (en) * 2010-10-15 2011-04-20 镇江市华银仪表电器有限公司 Method for processing novel environmental-protection spiral cable with high elasticity
CN202282187U (en) * 2011-11-06 2012-06-20 远东复合技术有限公司 Twisted composite core
CN203300272U (en) * 2013-05-04 2013-11-20 安徽省康利亚实业有限公司 High-temperature and strong-radiation resistance low-noise cable capable of detecting minimal signals
CN105702328A (en) * 2016-01-19 2016-06-22 安徽省巢湖海兴电缆集团有限公司 Anti-torsion thin-wall multi-pair locomotive cable
CN105719734A (en) * 2016-01-19 2016-06-29 安徽省巢湖海兴电缆集团有限公司 High-temperature resisting type thin-wall insulation shielding type locomotive vehicle cable

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