SJSZ series of conical twin screw extruder is specializing in extruding pipes using various kinds of PVC powder. Product intro.: 1) SJSZ series of conical double screw extruder is specializing in extruding pipes using various kinds of PVC powder. When equipped with different moulds and auxiliary machines, such products as any PVC pipes, profiles, plates, sheets, rods and pellets can be produced. ...