... ,long use-life. 2.Maintenance is simple and convenient. Wood-Plastic Compound,Special Shaped Materials,Plate Extructing Production Line Characteristics and ... .The unit is composed of cone double-screw-stem extruder,vacuum shaping table,drawing machine,cutter,laminator,turn-over ... and window production line adopts cone double-screw-stem extruder to process PVC special-shaped door and window materials, ...