Plastic film blowing machine material to prevent hard objects falling into the barrel of raw materials with metal impurities and the damage to the machine tools operation. Open the air intake regulating valve, to add a small amount of compressed air from the mandrel center hole, check whether the instrument damage is not normal. First ensure that all parts of the safety and normal, so as not to affect the production and cause accidents. Equipped with lifting traction and traction device, foam stability, can use stable production, the guide roller surface is chrome plated, long service life. The compressed air pressure of the blowing tube is suitable, which can not only make the tube billet rupture, but also ensure the symmetry and stability of the film tube, and ensure the quality of the production.