Basic knowledge about cable reels

The manufacturing of cable reels is completely different from most electromechanical products. Cable reels are based on length as the basic unit of measurement. All wires and cables start from the processing of conductors, adding insulation, shielding, cabling, and sheathing layer by layer to the periphery of the conductor to make wire and cable products. The more complex the product structure, the more layers of overlap.

Cable reels are made through three processes: drawing, stranding, and coating. The more complex the model and specification, the higher the repeatability.

1. Drawing in metal pressure processing. Under the action of external force, the metal is forced through the die (press wheel), 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. The drawing process is divided into: monofilament drawing and twisting drawing.

2. Twisting In order to improve the flexibility and integrity of the wire and cable, two or more single wires are intertwined in a specified direction, which is called twisting. The stranding process is divided into: conductor stranding, cable formation, braiding, steel wire armoring and winding.

3. Coating According to the different performance requirements of cable reels, special equipment is used to coat different materials on the outside of the conductor. Coating process points:

A. Extrusion: rubber, plastic, lead, aluminum and other materials.

B. Vertical package: rubber, corrugated aluminum tape material.

C. Winding: ribbon-shaped paper tape, mica tape, alkali-free glass fiber tape, non-woven fabric, plastic tape, etc., linear cotton yarn, silk and other fiber materials.

D. Dip coating: insulating paint, asphalt, etc.