Manufacturing process of power cord for electronic wire manufacturers

1. Power cord copper and aluminum monofilament drawing

The copper and aluminum rods commonly used by electronic wire manufacturers for power cords, at room temperature, use a wire drawing machine to pass through the die holes of one or several drawing molds to reduce the cross section, increase the length, and improve the strength. Wire drawing is the first process of various wire and cable companies, and the primary process parameter of wire drawing is mold matching technology.

2. Single wire annealing for power cord

When the copper and aluminum monofilament is heated to a certain temperature, the toughness of the monofilament is improved by the method of recrystallization, and the strength of the monofilament is reduced to meet the requirements of the wire and cable for the conductive core. The key to the annealing process is to eliminate the oxidation of the copper wire.

3. Stranding of power cord conductors

In order to improve the flexibility of the power cord and facilitate the laying of the device, the conductive core is formed by twisting multiple monofilaments. From the twisting method of the conductive core, it can be divided into regular twisting and irregular twisting. Irregular stranding is divided into bundle stranding, concentric stranding, extraordinary stranding and so on. In order to reduce the occupied area of the wire and reduce the geometric size of the power cord, the compaction method is also used in the stranded conductor, so that the popular circle is mutated into a semicircle, a sector, a tile shape and a compact circle. This kind of conductor is mainly used on the power cord.

4. Power cord insulation extrusion

Plastic power cords mainly use extruded solid insulation layer. The main technical requirements for plastic insulation extrusion:

5. The power cord is wired

Regarding the multi-core power cord, in order to ensure the molding degree and reduce the shape of the power cord of the electronic wire manufacturer, it is generally required to twist it into a round shape. The stranding mechanism is similar to that of conductor stranding, because the stranding pitch diameter is larger, and most of the twist-free methods are used. The technical requirements for cable formation: First, the root of the special-shaped insulated core turns over and cause the cable to twist; the second is to avoid the insulation layer from being scratched.

6. Power cord inner sheath

In order to protect the insulated core from being damaged by the armor, proper maintenance of the insulating layer is required. The inner protective layer is divided into: extruded inner protective layer (isolation sleeve) and wrapped inner protective layer (cushion layer). The wrapping cushion replaces the lashing tape and the cable forming process is performed simultaneously.

7. Power cord armor

The power cord laid in the underground electronic wire manufacturer can accept the certain positive pressure effect during the task, and the inner steel tape armor structure can be selected. The power cord is laid in places with both positive pressure effect and tensile effect (such as water, vertical shaft or soil with large drop), and the structural type with inner steel wire armor should be selected.

8. Power cord outer sheath

The outer sheath is a structural part of the insulating layer of the power cord to avoid corrosion of the situation elements. The primary effect of the outer sheath is to improve the mechanical strength of the power cord, prevent chemical corrosion, moisture resistance, water immersion, and prevent the power cord of the electronic wire manufacturer from burning. According to the different requirements of the power cord, the plastic sheath shall be directly extruded by the extruder.