Working principle of bottle blowing machine

The most simple explanation of the bottle blowing machine is a machine that can blow the finished preform into a bottle through a certain technological means.

At present, most of the bottle blowing machines are still two-step bottle blowing machines, that is, the plastic raw materials must be made into preforms before blowing. Nowadays, environmentally friendly plastics made of PET are commonly used.

The tubular plastic parison obtained by extrusion or injection molding of the thermoplastic resin is placed in a split mold while it is hot (or heated to a softened state). After the mold is closed, compressed air is injected into the parison to blow the plastic parison It expands and clings to the inner wall of the mold, and after cooling and demolding, various hollow products are obtained. 

The bottle blowing process was used to produce low-density polyethylene vials during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of bottle blowing machines, bottle blowing technology was widely used. The volume of the hollow container can reach thousands of liters, and some production has adopted computer control. Plastics suitable for bottle blowing include polyethylene, polyvinyl chloride, polypropylene, polyester, etc. The resulting hollow containers are widely used as industrial packaging containers.

According to the manufacturing method of the parison, bottle blowing can be divided into extrusion bottle blowing and injection bottle blowing. The newly developed multi-layer bottle blowing and stretch bottle blowing.

Zhangjiagang Nancheng Machinery Co., Ltd. can not only provide you with high-quality beverage filling machines, but also provide you with different bottle blowing machines according to your needs. If you have any questions, please email or call us.