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Talking about the function and manufacturing process of power cord
Apr 04, 2018

Function performance

Although the power cord is an accessory for home appliances, it plays a crucial role in the use of home appliances. If the power cord is broken, the entire appliance cannot be used. Household power cords should use BVV2 x 2.5 and BVV2 x 1.5 models of wires. BVV is a national standard code and is a copper sheathed wire. 2x2.5 and 2x1.5 represent two cores of 2.5 mm2 and 2 cores of 1.5 mm2, respectively. Under normal circumstances, 2 × 2.5 as the main line, trunk, 2 × 1.5 as a single electrical feeder, switch line. The single-phase air-conditioning line uses BVV2 × 4 and is equipped with a dedicated ground wire.

Manufacturing process

Power lines are produced every day. The power line has to be more than 100,000 meters a day and the plug is 50,000. With such huge data, the production process must be very stable and mature. After continuous exploration and research and recognition of European VDE certification bodies, national standard CCC certification bodies, US UL certification bodies, British BS certification bodies, and Australian SAA certification bodies, the power cord plug has matured. under:

1. Power cord copper and aluminum monofilament

The copper and aluminum rods commonly used for power cables are applied at room temperature to one or more drawing die holes of a drawing machine to reduce the cross section, increase the length, and increase the strength. Drawing is the first process of all wire and cable companies. The primary process parameter for drawing is the matching of molds.

2. Power cord monofilament annealing

The copper and aluminum monofilaments are heated to a certain temperature, and the recrystallization method is used to improve the toughness of the monofilaments and reduce the strength of the monofilaments so as to meet the requirements of the wire and cable for the conductive cores. The key to the annealing process is to eliminate the oxidation of the copper wire.

3. Power cable conductor twisted

In order to improve the flexibility of the power cord, in order to lay the device, the conductive core receives a plurality of monofilaments stranded. From the stranding method of the conductive core, it can be divided into the normal stranding and the unregular stranding. Non-regular twisting is divided into bunched twisted, untied twisted, extraordinary twisted and so on. In order to reduce the occupied area of the wire and reduce the geometric dimension of the power cable, a tight press method is also adopted for the stranded conductor, so that the popular round shape is mutated into a semicircle, a fan shape, a tile shape, and a tightly-pressed round shape. This type of conductor is primarily used on power lines.


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