Wire and cable extrusion

Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed through a die with the desired cross-section. The extrusion process can be done with the material hot or cold. In a subsequent stage, molten plastic is applied to the entire circumference of the wire, forcing it to adhere to the structure of the wire or cable. Extrusion is most commonly used for wire insulation and to form the outer sheath of the cable.


Drawing is a similar process, which uses the tensile strength of the material to pull it through the die. This limits the amount of change that can be performed in one step, so it is limited to simpler shapes, and multiple stages of decreasing size are usually needed. Drawing is the main way to produce wire. Metal bars and tubes are also often drawn. Drawing is usually done at room temperature.


What are the processes commonly used ?