NingBo Qiaopu Electric Co., Ltd Power cord manufacturing process

Every day in the production of power lines, power lines over a day to 100,000 m, plugs 50,000, such a large data, and its production process must be very stable mature. Through continuous exploration and research and European VDE certification bodies, national standard CCC
Power Line
Certification, UL Organisation, BS certification body, the Australian SAA certificate authority ........ recognized the power cord has matured to profile under the following:
1. Power cord copper, aluminum single strands System
Power cord commonly used in copper, aluminum timber, at room temperature, applied through a drawing machine or the number of road stretching the die hole, to reduce the cross-section, add the length and strength progress. Drawing is the first of the wire and cable company procedure, drawing with the primary process parameters are model craft.
2. Single-wire power cord annealing
Copper, aluminum filament heated to temperatures necessary to approach to the progress of recrystallization the toughness of a single wire, reducing the strength of a single wire to fit on the conductive core wire and cable requirements. Annealing process is crucial to eradicate the oxidation of copper.
3. Power line conductor stranding
In order to progress in the power cord of tenderness in order to facilitate the laying device, conductive core to accept multiple monofilaments twisted together. From the twisted wire core conductive way, rules can be divided into twisted strands and non-rules. Rules are divided into non-Stranded Stranded together and re-twist, twisted and so extraordinary. Footprint to cut the wire to reduce the geometric size of the power cord, also used in the stranded conductor pressed ways to make the popular round mutate into semi-circular, fan-shaped, tile-shaped, and pressed the round. The primary use of this conductor in the power cord.
4. Power cable insulation extrusion
Plastic power cable with extruded solid-type primary insulation layer, the first craft out of plastic insulation requirements:
4.1. Partial pain level: out of the insulation thickness of the bias value is the level of performance arts crowded the main tag office, much the product of both structural size and tend to value both in the specification to understand the rules.
4.2. Lubrication: Squeeze appearance of the insulation requirements of lubrication, shall not render appearance of coarse and heavy, burning, poor quality of impurities
4.3. Density: Extrusion cross section of insulation to compact robust, visible to ban a pinhole, to eradicate the existence of a bubble.
5. Power cord into a line
On multi-core power cable to guarantee shape, smaller form factor power supply line, the general demand of its strands are rounded. Stranded Conductor stranding mechanism and similar, as stranding pitch diameter larger, most no-back twist method. Craft cabling requirements: First, to eradicate stand shaped insulated core cable twisting bending incurred; the second is to prevent insulation from being scratched.
Large local cable into the cable in the other two processes is also accompanied by the completion of: one is filled, assure the cable into the cable round and after the change; one is binding, and assure the cable core is not loose.
6. Within the sheath power cable
Insulated core in order to maintain armored the wart is not injured, the demand for the maintenance of proper insulation, inner sheath points: squeeze bag protection layer (isolation units) and the sheath around the bag (cushion). Wrapped with a cushion and a cable alternative banding procedure simultaneously.
7. Power wire-bound armor
The laying of underground power lines, the task can accept the inevitable effect of positive pressure, you can choose the steel armor construction. Power cable laid in the existing tension effect of positive pressure effect have a place (such as water, the vertical shaft or a larger gap between the soil), should be selected within the device has a structure of steel armor type.
8. Outer sheath power cable
Outer sheath is to protect the power cord insulation to prevent corrosion of the structural elements of the local situation. The primary effect of outer sheath power cable mechanical strength of progressive, anti-chemical corrosion, moisture, water immersion, in order to prevent burning power cord. Differences based on a power line requires the application of extrusion machine directly extruded plastic jacket.