Mechanical energy generated by turning screws and by heaters arranged along the barrel. The molten polymer is then forced into a die, which shapes the polymer into a shape that hardens during cooling.

Plastic extrusion can be done with a wide variety of materials:

Polyethylene (PE),
Polypropylene (PP),
Acetal,
Acrylic,
Nylon (polyamides),
Polystyrene (PS),
Polyvinyl chloride (PVC),
Acrylonitrile butadiene styrene (ABS).
Polycarbonate (PC