processingdetails

Blow Molding

Blow molding, also can be referred as blow molding or blow forming, which is a process that is commonly used to make hollow plastic parts by inflating a heated plastic tube until it fills a mold and forms the desired shape. And generally blow molding can be divided into three main types: extrusion blow molding, injection blow molding, and stretch blow molding.

More in detail, the blow molding process begins with melting down the plastic and forming it into a parison or performs. The parison is a tube-like piece of plastic with a hole in one end in which compressed air can pass through. The parison is then clamped into a mold and air is pumped into it. The air pressure then pushes the plastic out to match the mold. Once the plastic has cooled and hardened the mold opens up and the part is ejected.

Parts made from blow molding are plastic, hollow, and thin-walled, such as bottles and containers that are available in a variety of shapes and sizes. Small products may include bottles for water, liquid soap, shampoo, motor oil, and milk, while larger containers include plastic drums, tubs, and storage tanks.