1,Model SJSZ-51 2,Double Screw Extruder; 3,Inside is spiral wire; 4,L ... INTRODUCTIONS:1, SJSZ series conical twin screw extruder is special equipment for all kinds of PVC ... powder extruder;2, The conical double screw extruder system has applied computer control;3 ... enlarged, the cooling is rapid.4, The double screw extruder system can produce PVC plastic pipes, profiles, sheets, ...