CN112382431A

CN112382431A - Oil-resistant drag chain line and production process

Info

Publication number: CN112382431A
Application number: CN202011015103.7A
Authority: CN
Inventors: 赵航; 张惠娟; 安富涛; 教明章
Original assignee: Huizhou LTK Electronic Cable Co Ltd; LTK Electric Wire Huizhou Co Ltd; LTK Electric Wire Changzhou Co Ltd
Current assignee: Huizhou LTK Electronic Cable Co Ltd; LTK Electric Wire Huizhou Co Ltd; LTK Electric Wire Changzhou Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-02-19

Abstract

The invention discloses an oil-resistant drag chain line which comprises a plurality of core line layers, wherein the core line layers comprise a Kevlar line inner layer, a conductor and an insulating layer, the Kevlar line inner layer is arranged in the center of the conductor, the conductor is tightly wrapped on an outer surface layer of the Kevlar line inner layer, the insulating layer is tightly wrapped on the outer side of the conductor, the core line layers are annularly arranged, the Kevlar line center layer is arranged at the center of the annular arrangement of the core line layers, and an outer coating layer is tightly wrapped on the outer side of the core line layers; the drag chain line directly compounds into a line with prior art's many lathe heart yearns, separates through the insulating layer, only needs fixed single pencil when fixed in the lathe, solves current lathe pencil and needs many tight bundles together, often can damage the cable insulating layer to a certain extent tightly restrainting, and the frequent overload operation of equipment in addition makes the cable not reach life expectancy value just because of overuse or bad use condemned problem in advance.

Description

Oil-resistant drag chain line and production process

Technical Field

The invention belongs to the technical field of cables for machine tools, and particularly relates to an oil-resistant drag chain line and a production process thereof.

Background

The tow chain cable is a high-flexibility special cable which can move back and forth along with the tow chain and is not easy to wear, can be generally called a tank chain cable, and is gradually developed and evolved from a machine tool cable. In the early stage, a plurality of wires with different specifications are put together and fixed by a bundling device and then are arranged in a cable trough for use (some wires can be added with a net pipe at the outermost layer after being bundled to improve the wear resistance). The conductor is a plurality of tin-plated annealed copper wires, and the insulating sizing material is a polyvinyl chloride material. Due to the limitation of the old tightening device, the cable insulation layer is often damaged to a certain extent during tightening, and in addition, the equipment is often overloaded to operate, so that the cable is scrapped in advance due to overuse or poor use when the expected service life value of the cable is not reached. The short circuit and the open circuit usually occur after tens of thousands or hundreds of thousands of towlines are used.

The early assembly structure is shown in fig. 1, in which 8 core wires are fixed together by a tightening band (number 3). Each core wire is composed of a conductor (number 1) and an insulating layer (number 2).

The traditional production process comprises the following steps: extrusion, assembly and bundling.

1. Extruding: extruding a finished product wire according to the specification of the wire required by the point position/terminal head;

2. assembling: putting the extruded finished product wires together and arranging the finished product wires in a cable groove;

3. tightening: and (4) tightening the finished wires in the cable groove at intervals by a tightening device.

Because of all being solitary finished product line in the equipment, often can be because of cutting out the improper, not equal or mismatch of line length, the wiring is neat and level, leads to the actual length of every electric wire in the cable duct different in size, leads to the unbalanced electric wire risk of splitting that arouses of atress in the tow chain use.

Traditional tow chain electric wire is after many times tow chain is buckled, the condition such as insulated conductor, insulating sizing material, shielding layer conductor, oversheath layer fracture or fracture often take place, the conductor fracture can lead to the electric wire to open circuit, the insulating layer fracture can arouse the short circuit, burn out trouble such as chip, the sheath layer fracture can produce the electric leakage risk, can frequently appear the electric wire to the unreasonable traditional tow chain electric wire of overall arrangement and beat and turn round and insulation damage, beat turn round and damage the point and extremely easily appear opening circuit, short circuit or broken skin condition.

Disclosure of Invention

In order to solve the above problems, the present invention provides the following technical solutions:

an oil-resistant drag chain line comprises a plurality of core line layers, wherein the plurality of core line layers comprise a Kevlar line inner layer, a conductor and an insulating layer, the Kevlar line inner layer is arranged in the center of the conductor, the conductor is tightly coated on the outer surface layer of the Kevlar line inner layer, the insulating layer is tightly coated on the outer side of the conductor, the plurality of core line layers are annularly arranged, a Kevlar line center layer is arranged at the center of the annular arrangement of the plurality of core line layers, and an outer coating layer is tightly coated on the outer side of the plurality of core line layers.

Preferably, a fastening layer is further arranged between the core wire layers and the outer coating layer, the inner wall of the fastening layer is tightly wrapped outside the core wire layers, and the outer side of the fastening layer is attached to the outer coating layer.

Preferably, the conductor is made of copper foil wire material.

Preferably, the insulating layer is made of a polytetrafluoroethylene material.

Preferably, the outer layer is made of a thermoplastic elastomer.

The production process of the oil-resistant drag chain line comprises the following steps:

s1, extruding a core wire: extruding the Kevlar inner layer, the conductor and the insulating layer by using an extruder to obtain a core wire layer;

s2, cabling of core wires: taking a Kevlar wire as a central layer, annularly arranging a plurality of core wire layers outside the Kevlar wire central layer, and covering the outside of the plurality of core wire layers with a fastening layer to fix the position of each core wire layer to obtain a semi-finished product;

s3, outer extrusion: and extruding the semi-finished product by using an extruder to form an outer coating layer which is made of thermoplastic elastic material and is tightly coated on the outer side of the semi-finished product, thereby obtaining the drag chain line.

Preferably, the extruder in each of the steps S1 and S3 is a 120-size extruder.

The invention has the advantages that:

1. the invention can meet the requirement only by 1 composite wire without assembly, thereby reducing the working strength of the assembly procedure and the risk probability of product failure in advance caused by uncontrollable operation and avoiding subsequent use faults caused by irregular winding displacement;

2. according to the invention, a traditional tin-plated annealed copper conductor is replaced by a copper foil wire material, the tensile strength is reduced from 420N/mm to 205N/mm, the elongation is increased from 10% to 30%, the conductor anti-aging performance is enhanced, Kevlar wires are added in the core wire layers and in the middle of each core wire layer, the Kevlar wire has the tensile strength of 2800N/mm and the elongation of 25%, and in actual use, the Kevlar wires are preferentially stressed to ensure the good transmission performance of the copper foil wires;

3. the insulating layer is added on the outer side of the conductor, is made of polytetrafluoroethylene materials, has the tensile strength of 50 Mpa, the elongation of 400 percent and the use temperature range of-60-260 ℃, has excellent comprehensive performance, stable chemical performance, good processability, high wear resistance, oil resistance, resistance to various acid and alkali chemical reagents and high flame retardance, and can better protect the lead;

4. the tight binding is bound on the outer layer, and the binding force is not directly acted on the core wire layer, so that the short circuit risk of the electric wire aged in advance by the rubber material is eliminated; meanwhile, the outer layer is made of thermoplastic elastic materials, so that the material has high elasticity, can counteract partial binding force, has the advantages of no halogen, no toxicity, environmental protection, softness, good elasticity, fatigue resistance, weather resistance, oil resistance and the like, and can be more suitable for machine tool drag chain cables.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

the embodiment of the invention mainly comprises the following component symbols:

the cable comprises a core wire layer-1, a Kevlar inner layer-101, a conductor-102, an insulating layer-103, a Kevlar central layer-2, a fastening layer-3 and an outer coating layer-4.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

Referring to fig. 2, the oil-resistant drag chain line comprises a plurality of core line layers 1, wherein the plurality of core line layers 1 comprise a kevlar inner layer 101, a conductor 102 and an insulating layer 103, the kevlar inner layer 101 is arranged in the center of the conductor 102, the conductor 102 is tightly wrapped on the outer surface layer of the kevlar inner layer 101, the insulating layer 103 is tightly wrapped on the outer side of the conductor 102, the plurality of core line layers 1 are annularly arranged, the kevlar central layer 2 is arranged in the center of the plurality of core line layers 1, and the outer surface layer 4 is tightly wrapped on the outer side of the plurality of core line layers 1.

And a fastening layer 3 is also arranged between the core wire layer 1 and the outer tegument 4, the inner wall of the fastening layer 3 is tightly coated outside the core wire layers 1, and the outer side of the fastening layer 3 is attached in the outer tegument 4.

The conductor 102 is made of a copper foil wire material; the insulating layer 103 is made of polytetrafluoroethylene material; the outer layer 4 is made of a thermoplastic elastomer.

s1, extruding a core wire: extruding the Kevlar inner layer 101, the conductor 102 and the insulating layer 103 by using an extruder to obtain a core wire layer 1;

s2, cabling of core wires: taking a Kevlar wire as a central layer, annularly arranging a plurality of core wire layers 1 outside a Kevlar wire central layer 2, and covering the outside of the core wire layers 1 with a fastening layer 3 to fix the position of each core wire layer 1 to obtain a semi-finished product;

s3, outer extrusion: and extruding the semi-finished product by using an extruder to form an outer coating layer 4 which is made of thermoplastic elastic material and is tightly coated on the outer side of the semi-finished product, thereby obtaining the drag chain line.

The extruders in the steps S1 and S3 are 120 large extruders.

This drag chain line directly makes conductor 102 core line layer 1 through the extruder, and then will make drag chain line according to the core line layer 1 of the required quantity of lathe through the extruder extrusion, sets up the position of fastening layer 3 fastening every core line layer 1 in the core line layer 1 outside, avoids causing every core line layer 1 aversion bending deformation to lead to the fact the problem that the bending part accelerates ageing because of dragging drag chain line, the quantity of core line layer 1 in the invention is set for according to the core line quantity that the lathe needs, the diameter cooperation core line layer 1 quantity of Kevlar core layer 2 is set for.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An oil-resistant drag chain line is characterized in that: the core wire layer comprises a plurality of core wire layers (1), wherein the core wire layers (1) comprise a Kevlar inner layer (101), a conductor (102) and an insulating layer (103), the Kevlar inner layer (101) is arranged at the center of the conductor (102), the conductor (102) is tightly wrapped on the outer surface layer of the Kevlar inner layer (101), the insulating layer (103) is tightly wrapped on the outer side of the conductor (102), the core wire layers (1) are annularly arranged, a Kevlar central layer (2) is installed at the center of the annular arrangement of the core wire layers (1), and an outer layer (4) is tightly wrapped on the outer side of the core wire layers (1).

2. The tow line according to claim 1, wherein: and a fastening layer (3) is also arranged between the core wire layers (1) and the outer tegument (4), the inner wall of the fastening layer (3) is tightly coated outside the core wire layers (1), and the outer side of the fastening layer (3) is attached in the outer tegument (4).

3. The tow line according to claim 2, wherein: the conductor (102) is made of a copper foil wire material.

4. The drag chain line of claim 3, wherein: the insulating layer (103) is made of a polytetrafluoroethylene material.

5. The drag chain line of claim 4, wherein: the outer layer (4) is made of a thermoplastic elastomer.

6. The production process of the oil-resistant drag chain line is characterized by comprising the following steps:

s1, extruding a core wire: extruding the Kevlar inner layer (101), the conductor (102) and the insulating layer (103) by using an extruder to obtain a core wire layer (1);

s2, cabling of core wires: taking a Kevlar wire as a central layer, annularly arranging a plurality of core wire layers (1) at the outer side of the Kevlar wire central layer (2), and coating the outer sides of the core wire layers (1) by using a fastening layer (3) to fix the position of each core wire layer (1) to obtain a semi-finished product;

s3, outer extrusion: and extruding the semi-finished product by using an extruder to form an outer coating layer (4) which is made of thermoplastic elastic material and is tightly coated on the outer side of the semi-finished product, thereby obtaining the drag chain line.

7. The production process of the drag chain line according to claim 6, characterized in that: the extruders in the steps S1 and S3 are 120 large extruders.