What is a cable extrusion machine?

A cable extrusion machine is central to wire and cable manufacturing. It applies protective or functional layers—like insulation or outer sheathing—onto conductors. Here’s how it works in practice:

●Core Function
Material Coating — Melts raw plastic or rubber compounds (e.g., PVC, XLPE) into a fluid state. — Uniformly coats wires or cable cores as they pass through the machine.

●Key Components
▸Hopper
— Raw material (pellets/powder) is fed here. Gravity moves it into the barrel.
▸Barrel and Screw
— The barrel heats material while a rotating screw mixes and pushes it forward.
— Gradually melts the material into a viscous fluid.
▸Extrusion Head & Die
— Molten material is forced through the head.
— A precisely shaped die molds it around the moving conductor.
▸Cooling System
— Freshly coated cables pass through water troughs or air-cooling chambers.
— Solidifies the insulation/sheathing quickly to retain shape.
▸Puller & Cutter
— Pullers maintain tension for even coating.
— Cutters trim cables to preset lengths (if needed).