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. Our wide range of product includes vacuum sintering Nickel-based alloy barrels, Nickel-based alloy coated screw, centrifugal casting Iron-based alloy barrel and fully hardened screws. ISO 9000 certified, SUPERIOR MACHINERY is headquartered in Ningbo Zhoushan. Our 10.000m2 plant is equipped with cutting-edge precision facilities which allow us to produce high-end screws and barrels based on resistance to abrasion, corrosion, high pressure, high-speed and suitable for several kind of different materials, such as halogen-free materials, high fiber materials, ceramic, powder alloy, magnetic materials, high corrosive materials, high temperature materials, thermosetting materials, liquid materials, high abrasion materials and other special materials. The fully hardened screw material is made of die steel and HIP powder alloy steel imported from the United States, Germany, Austria, Sweden, Switzerland, Japan and other countries.