... efficient self-cleaning, transmission, compounding, pressure-forming, etc.made of high tool speed W6Mo5Cr4V2, or anti-corrosion steel 38CrMoAlA by ... become twin screw which are essential and key part of extruders for material to transmission, shearing and plasticization. ... We can provide customers with spare parts for all kinds of extruders; includingscrew elements, linings, melt pumps, screw changers, ...