UHMWPE forming: pressing and sintering. Pressing and sintering ultrahigh molecular weight polyethylene (UHMW-PE) most primitive processing methods. This method is rather low production efficiency ultra high molecular weight polyethylene liner price, prone to oxidation and degradation. In order to improve production efficiency Usually ultra high molecular weight polyethylene liner, can direct electrical heating. UHMWPE molding: extrusion. Extrusion equipment are ram extruder, a single screw extruder and a twin screw extruder. Use of a twin screw extruder co-rotating twin-screw extruder. The 1960s were powered by a ram extruder, the mid-1970s, Japan, the United States, West Germany has developed a single-screw extrusion process.