Extrusion is a manufacturing process used to make pipes, hoses, drinking straws, curtain tracks, rods, and fibre.
[1] The granules melt into a liquid which is forced through a die, forming a long 'tube like' shape.
The tube may be printed upon, and cut at equal intervals.
One of the most famous products of extrusion moulding is the optical fiber cable.
Extrusion is similar to injection moulding except that a long continuous shape is produced.