1.conical twin screw extruder 2.directly molding of PVC powder materiral, good effective 3.air or oil cooling for barrel Conical Twin Screw Extruder LSZ series twin screw conical extruders are high effective extrusion equipments, they have small shear rate, difficulty to break down the material, uniform plastic mixing, high capacity, high quality, good self-cleaning, big application, long life ...