Zhoushan Changjia Plastic machinery Co., LTD is located in the middle of Jintang Island of the city of Zhoushan,As is a professional China Twin screw extruder manufacturers and Twin screw extruder factory, Company combines scientific research development, production and business operation and business property as a whole,our Twin screw extruder are based upon high quality steel 38CrMoALA.This Company's products are based upon high quality steel 38CrMoALA, which is conditioned, surface nitridized (or coated with hard alloy) and polished, showing very high precision, wear resistance and long service life, therefore, used by many famous brand molding machines at home and abroad.