What does the blow molding machine profession say? Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. The tubular plastic parison obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while it is hot (or heated to a softened state). After the mold is closed, compressed air is passed into the parison to blow the plastic parison Swell and cling to the inner wall of the mold, after cooling and demoulding, you can get a variety of hollow products. The professional definition and classification of blow molding machine are introduced as follows. The manufacturing process of blown film is very similar to the blow molding of hollow products in principle, but it does not use a mold. From the perspective of the classification of plastic processing skills, the forming process of blown film is usually included in extrusion. The blow molding process was used to produce low-density polyethylene vials during the Second World War. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding skills were widely used. The volume of the hollow container can reach thousands of liters, and some production has been controlled by computer. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc. The resulting hollow containers are widely used as industrial packaging containers.
The research report on the blow molding machine market shows that after the liquid plastic is sprayed out, the plastic body is blown into the mold cavity of a certain shape using the wind force blown by the machine, so that the product is made. This machine is called a blow molding machine. The plastic is melted and squeezed out in a screw extruder and then extruded through a mouthpiece, and then blown and cooled by a wind ring, and then a tractor pulls at a certain speed, and the winding machine winds it into a roll.