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Basic Process Of Plastic Wire And Cable Manufacturing
Industry information

2018-12-29Industry information游客:51


1. Single Wire Drawing Of Copper And Aluminum
Wire and cable commonly used copper, aluminum bar material, at room temperature, the use of wire drawing machine through one or several stretching die die hole, so that its section is reduced, length is increased, strength is improved.Wire drawing is the first process of each wire and cable company.
2. Monofilament annealing
When heated to a certain temperature, copper and aluminum mono-wires are recrystallized to improve their toughness and reduce their strength, so as to meet the requirements of electric wires and cables for conducting core.The key of annealing process is to eliminate the oxidation of copper wire.
3.  Stranding of conductors
In order to improve the softness of electric wires and cables for laying and installation, the conductive core is made of multiple single strands twisted together.From the form of conductor core stranding, it can be divided into regular stranding and irregular stranding.Irregular stranding can be divided into bundle stranding, concentric compound stranding and special stranding.
   In order to reduce the occupied area of the conductor and reduce the geometric size of the cable, the common circle is changed into a semicircle, a fan, a tile and a compact circle when the conductor is twisted.This conductor is mainly used in power cables.
4. The insulation extrusion
Plastic wire and cable is mainly packed solid insulation layer, plastic insulation extrusion of the main technical requirements: eccentricity, smoothness, density.
5. Cabling
In order to guarantee the degree of forming and reduce the shape of multi-core cable, it is generally necessary to twist it into a circle.The mechanism of stranding is similar to that of conductor stranding. Due to the large pitch diameter of stranding, most of them adopt non-backing torsion.Technical requirements for cable forming: one is to prevent the twisting and bending of cables caused by the turning over of special-shaped insulated core;The second is to prevent scratch insulation layer.
Most cables are formed at the same time with the completion of the other two procedures: one is to fill, to ensure the roundness and stability of the cable formed;One is to tie up, to ensure that the cable core is not loose.
6. The protective layer
To protect the insulated wire core from being armored, it is necessary to protect the insulation layer properly, and the inner sheath consists of extrusion inner sheath (isolation sleeve) and wrapping inner sheath (cushion).Wrap gasket instead of binding belt and cable forming process simultaneously.
7. Install the armoured
For laying underground cable, it may bear some positive pressure in operation, and the inner steel belt armor structure can be selected.Cable laying in both positive pressure and tension role of the occasion (such as water, vertical shaft or large drop in the soil), should be selected with internal steel wire armor structure.
8. Over Sheath
The outer sheath is the structural part that protects the insulation layer of electric wires and cables from environmental factors.The main function of the outer sheath is to improve the mechanical strength, chemical corrosion resistance, moisture resistance, water resistance to immersion, and prevent the burning of cables.According to the different requirements of the cable, the plastic sheath is directly extruded by the extruder.
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Yangzhou fongming cable factory, your side of the special cable experts.



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