Used for blowing high pressure polyethylene, the products are widely used in composite film, packaging film, agricultural film, textile, garment bag or film packing, the main motor adopts frequency control, increase the stability of the host speed, and can save 30%, screw barrel with 38 chromium molybdenum aluminum, the diameter of nitrogen treatment by traction frame lift, no matter what large and small size films were able to make the best effect of cooling.