Production process and principle of blow molding machine:
Dry polyethylene particles are added to the feeding hopper and enter the screw through the weight of the particles themselves. When the particles come into contact with the threaded edge, the rotating edge generates a thrust perpendicular to the plastic surface, pushing the plastic particles forward. During the pushing process, due to the friction between the plastic material and the screw, the plastic and the machine barrel, as well as the collision and friction between the particles, the particles gradually dissolve due to external heating of the barrel. The molten plastic is filtered by the machine head to remove impurities and comes out of the mold mouth. It is cooled by an air ring, blown and expanded through a herringbone board, pulled by a roller, and rolled into a cylinder to roll the finished film.