After the blow molding machine sprays out the liquid plastic, the wind blown by the machine is used to blow the plastic body to a certain shape of the mold cavity to make a product. The plastic is melted and quantitatively extruded in the screw extruder, and then formed through the mouth film, and then cooled by a wind ring, then a tractor is pulled at a certain speed, and the winder winds it into a roll. Extrusion blow molding plasticizes the pellets (or powders) of thermoplastics through an extruder and passes through a specific die to prepare a hot-melt tubular parison, which is then blow-molded.
Injection blow molding uses a split mold to inject the parison onto the mandrel. After the parison is properly cooled (the surface layer of the parison is solidified, the shape of the parison will not be broken or deformed when the mandrel is moved). The parison is sent to the blow mold together with the parison, the blow mold is closed, and compressed air is introduced through the mandrel to inflate the parison to form the desired product. After cooling and shaping, the product is taken out. Stretch blow molding forces the parison to be stretched and formed within a specific temperature range. At the same time as it is molded, the macromolecules are aligned and fixed in the wall of the product, thereby greatly improving the performance of the plastic container. A molding method in which a bottomed parison heated at an appropriate temperature below the melting point is placed in a mold, and then blow-molded immediately after being stretched in the axial direction using a stretching rod. Multi-layer blow molding uses a multi-layer composite parison to prepare a multi-layer container molding method through a blow molding process.
Through the reasonable matching of various plastic layers, the effective complementation of the plastic properties of each layer is realized, thereby overcoming some inherent shortcomings of the single-layer plastic container. It should be noted that in the two-plate injection molding machine, sufficient plastic raw materials should be maintained. Moreover, different raw materials should be dried to different degrees according to the needs, so that our processing requirements for the process can also be met. Generally speaking, the personnel who operate the equipment need to be trained. If you are a novice, try to have staff nearby to guide you.