The fully hardened screws' raw materials are made in China or imported from Japan,United States,Swizerland,Sweden,Germany.We select the highest quality materials for different working conditions.

PVD coating and HVOF supersonic flame spraying are applied to the surface treatment of the screw,which greatly improves its performance and service life.

Since 1992,Superior Machinery designs and manufactures high-end barrels and screws for injection molding machines,extruders and for plastics processing equipment ,providing professional and customized solutions according to clients' requirements