purple shampoo bottle-injection blowing and injection stretch blow molding process
Compared with injection molding, extrusion and other processing technology, the development of blow molding processing technology is relatively late.
Like the rectangle shampoo bottle, its process principle comes from the blowing process of glass bottles or glass products. In the 1930s, the first blow molding machine came out, but due to the limitations of equipment and materials, it did not get rapid development at the beginning and was only used to produce low-density polyethylene bottles. In the 1950s, with the gradual development of high-density polyethylene and other new materials and the development of molding equipment, the blow molding process began to develop significantly, and bottles of different materials, structures, and sizes were gradually being widely used in various lines. In the industry.
