... conical twin screw extruder conical double screw extruder pvc double screw extruding machine twin screw extruder pvc SJZ series conical twin screw extruder SJZ series conical double screw extruder ... service life time etc. equipped with series mold and auxiliary machine, it can produce various PVC pipes ... , profiles, sheets, plates, bars and it also can be used for pelletizing. Main ...