2021.03.16
After the liquid plastic is sprayed out, the plastic body is blown to a cavity of a certain shape by the wind force blown out by the machine, so that the product is made, and the machine is called a blow molding machine. The plastic is called a blow molding machine. The plastic is melted and quantitatively extruded in a screw extruder, and then formed through a dough film, and then cooled by a wind ring, and then pulled by a tractor at a certain speed, and the winder winds it into a roll.
In the late 1950s, with the birth of high-density polyethylene and the development of the blow-molding machine, the blow-molding technology was widely used. The volume of the hollow container can reach several thousand liters, and the production of the hollow container has been controlled by computer. The plastic suitable for blow molding is polyethylene, polyvinyl chloride, polypropylene, polyester and the like, and the obtained hollow container is widely used as an industrial packaging container.
According to the method for making the parison, the blow-molding can be divided into extrusion blow-molding and injection blow molding, and the newly developed multi-layer blow molding and stretch blow molding.
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