Blow molding is mainly used to produce thin-walled hollow plastic products, such as plastic packaging bottles or health care bottles, pipes, car bumpers, etc. Most thermoplastics including PET, PS and PC plastics
Plastic packaging bottles and other materials that can be processed by blow molding, as well as glass. For the production of asymmetric parts, extrusion blow molding is usually used. In the blow molding process, injection molding is performed on the parison,Then move to the blow molding machine for the injection blow molding process.

How are the plastic packaging bottles we see every day made? Blow molding, yes, this is a process used in plastic manufacturing. With the help of gas pressure, the hot-melt type closed in the mold is made.
The blank is blown to form a hollow article. Blow molding is divided into extrusion blow molding and injection blow molding. Among them, extrusion blow molding has a lower mold cost, while injection blow molding provides more controllable parameters, such as Wall thickness and weight.

The blow molding process consists of several standard steps:
The parison is installed on the nozzle of the machine, and then placed into the mold, which is divided into two halves.
The hot air is passed through the blowing head to form the blank and expand to the shape of the mold.
Cool in the mold for a few seconds, cooling before demolding.
Remove the extra material from both ends to finalize the finished product.