Purpose: it is used to blow all kinds of low density polyethylene (LDPE), high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) plastic films. It is widely used in the packaging of various civil industrial products such as food bags, cargo bags, vest bags, clothing, textiles and so on. Features the barrel and screw of the extruder are made of high-quality alloy steel, nitrided and precision processed. It has the best hardness and corrosion resistance. The auxiliary machine is equipped with platform railing and workbench to make the operation more convenient. The coiling device adopts torque motor, which can maintain appropriate tension, wind up neatly and change coils conveniently.