Overjacketing extrusion

The plastic layer around an electrical wire is a good example of overjacketing. During this proces the wire (usually copper) is surrounded by a plastic layer using a type of extruder. The extruder used for this usually has a tool that is perpendicular to the extruder screw so that a wire may run true ut without the need to run down the entire machine. In the tool or mould there is a guidance for the wire which centers it in the middle of the viscous material flow.