Blow molding machineAlso known as hollow blow molding, a rapid development of plastic processing methods. Tubular plastic parison of thermoplastic resin by extrusion or injection molding obtained, while hot (or heated to the softening state), placed in the mold, die immediately after the parison is filled with compressed air, so that the plastic parison blowing mold and clings to the inner wall, the cooling and demoulding, obtain various hollow products. Blown film manufacturing process in principle and blow molding of hollow products are very similar, but it does not use the mold, from the perspective of the classification of plastic processing technology, blow molding process is usually included in the extrusion film. The blow molding process during the Second World War began for the production of low density polyethylene bottles. In the late 50s, with the birth of high-density polyethylene and the development of blow molding machine, blow molding technology has been widely used. Hollow container volume up to thousands of liters, some production has been using computer control. The utility model is suitable for blow molding plastics, such as polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the hollow container is widely used as an industrial packaging container.