Firstly, plastic raw materials are made into preforms, and then they are blown. Nowadays, commonly used environmentally friendly plastics made of PET.

There are 2 steps for PET plastic bottles

1. Warm up
The preform is irradiated by a high temperature lamp tube to heat and soften the body part of the preform. In order to maintain the shape of the bottle mouth, the preform mouth does not need to be heated, so a certain cooling device is required to cool it.
Second, blow molding
At this stage, the preheated preforms are put into the ready-made molds, and the high-pressure inflation is carried out to blow the preforms into the required bottles.
Bottle blowing machines on the market are generally divided into fully automatic and semi-automatic. The automatic blow molding machine combines the two operations of blowing through the operation of the robotic hand, eliminating the process of manually putting the preheated preform into the mold. Greatly speed up the production rate, of course, the price is higher than semi-automatic.