1. Copper wire drawing is the first process in the production of power cords. At room temperature, a wire drawing machine is used to pass through the die holes of one or several drawing dies to reduce the cross-section, increase the length and improve the strength.
2. The single wire of the power cord is annealed. When the copper wire is heated to a certain temperature, the toughness of the single wire is improved and the strength of the single wire is reduced by the method of recrystallization, so as 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 In order to improve the flexibility of the power cord for easy installation, the conductive wire core is formed by twisting multiple monofilaments. From the twisting method of the conductive wire core, it can be divided into regular twisting and irregular twisting. Non-regular stranding is further divided into bundle stranding, concentric compound stranding, and extraordinary stranding. In order to reduce the occupied area of the wire and reduce the geometric size of the power line, the stranded conductor is also compressed, so that the ordinary circle can be changed into a semicircle, a fan shape, a tile shape, and a compressed circle.
4 The power cord mainly adopts extruded solid insulation layer (insulation extrusion)
5 In order to ensure the formability of the multi-core power cord and reduce the deformation of the power cord, it needs to be twisted into a circular shape.
