Wires and cables are manufactured through three processes: drawing, twisting, and covering. The more complicated the model specifications, the higher the repeatability.
1. Drawing: In metal pressure processing, the metal is forced through a die (press wheel) under external force, the cross-sectional area of the metal is compressed, and the technical processing method to obtain the required cross-sectional area shape and size is called metal drawing .
Drawing process points: monofilament drawing and strand drawing.
2. Stranding: In order to improve the softness and overallness of wires and cables, it is called twisting that two or more single wires are woven together in a prescribed direction.
The stranding process is divided into: conductor stranding, cable formation, braiding, wire armoring and winding. </ DIV>
3. Covering: According to different performance requirements for wires and cables, special equipment is used to cover the outer surface of the conductor with different materials. Coating process points:
A. Squeeze: rubber, plastic, lead, aluminum and other materials.
B. Vertical package: rubber, wrinkled aluminum tape material.
C. Wrapping: tape-like paper tape, mica tape, alkali-free glass fiber tape, non-woven fabric, plastic tape, etc., linear cotton yarn, silk and other fiber materials.
D. Dipping: insulation paint, asphalt, etc.
