Both blow molding machines and bottle blowing machines play important roles in the plastics processing industry, but they differ significantly in several aspects.
Firstly, in terms of working principle, blow molding machines primarily work by heating and softening plastic granules into a liquid, or by using pre-made preforms and blowing them into bottles using specific processes. This process is highly efficient and fast, producing large quantities, making it ideal for mass production. Blow molding machines, on the other hand, work by extruding or injection molding thermoplastic resin to obtain a tubular plastic preform, which is then placed in a split mold while still hot. After the mold is closed, compressed air is immediately introduced into the preform, causing it to inflate and adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained.
Secondly, in terms of application products, blow molding machines mainly produce bottles of various shapes and sizes, which are widely used in the beverage, pharmaceutical, cosmetic, food, and chemical industries. Blow molding machines, however, are better suited for producing large barrels, warning posts, trays, floats, and other irregularly shaped blow-molded products, typically used in applications requiring hollow containers.
Finally, from the perspective of product characteristics, containers produced by blow molding machines have advantages such as being lightweight, inexpensive, and highly safe, making them very suitable for applications requiring large quantities and being cost-sensitive. Meanwhile, products produced by blow molding machines are characterized by high thickness, corrosion resistance, and wear resistance. These products can replace some ceramic containers, and their cost is lower, processing is relatively easier, and efficiency is higher.
