A blow molding machine is a device that uses a blow molding process to create hollow containers from plastic granules. Common types include one-step blow molding machines using PP and PE, injection stretch blow molding machines using PET, PC, or PP for two-step molding, and newly developed multi-layer blow molding and stretch blow molding machines.
Most blow molding machines are still two-step machines, meaning the plastic raw material must first be made into a preform before blowing. Currently, PET, an environmentally friendly plastic, is commonly used. A blow molding machine: This machine sprays liquid plastic and uses the airflow to blow the plastic body into a mold cavity of a specific shape to create the product. It is also a type of blow molding machine, namely a hydraulic blow molding machine.
Tubular plastic preforms obtained by extrusion or injection molding of thermoplastic resin are placed in a split mold while hot (or heated to a softened state). After the mold is closed, compressed air is immediately introduced into the preform to inflate it and make it adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained.
