This screw material cylinder is elabroately made of 38CRMOALA alloy steel after nitrogen treatment and has best rigidity and corrosion resistance.The die head is plated with hard chromium and has screw mandrel structure with uniform and smooth material discharging.And the water-cooled device has labyrinth type structure with characteristic as uniform air-jut quantity,automatic temperature control and automatic heating.This machine adopts a moment to collect.Being suitable for producing all sizes of transparent bags(such as garment bags,children’s toy packing,medical articles packing and so on).The result will be better if it is fitted with a rotate mold.e-mail:raruiyu(at)yahoo.cn  xixiangzhou(at)live.cn