PVC pipe conical twin screw extruder/plastic pipe extruder equipment/double screw extrusion machine. SJSZ series conical twin screw stem extruder is composed of barrel screw, gear transmission system,measurable feeding, vacuum deareating, heating, cooling and electric control components ect. It is mainly used in plasticizing, extruding and forming of PVC pipes, plates, sheets, film , profiles, and granules, ect. Welcome to visit our official website : http://www.pvcpipeextrusionline.com