Extrusion is a process where a material (commonly plastic, metal, or rubber) is forced through a shaped die to form products with a consistent cross-sectional shape. The material is typically heated to a malleable state before being pushed through the die, creating continuous lengths of products that can later be cut to the desired size.

Commonly used with materials such as plastics, metals, and ceramics, extrusion is widely utilized for producing long, continuous products like pipes, tubes, profiles, films, and sheets.