The process of continuously forcing both a plastic or elastomer and a conductor core through a die; thereby, applying a continuous coating of insulation or jacket to the core or conductor.
An extrusion machine is a device which pushes or pulls a material through a shaped die to form a continuous length of product with a preset cross section. The extrusion process is used to produce a large number of commercial products which include steel or copper wire, plastic tubing, plastic sheets and many food types. Extrusion as a manufacturing process offers many benefits such as the wide range of complex cross sections possible and the ability to form brittle materials. Depending on the material used, an extrusion machine may form the material cold or hot with some types of materials being completely melted prior to extrusion.