Blow Molding
Blow Molding
Manufacturing process using air pressure to form hollow plastic containers from a heated tube of plastic.
Blow molding is a manufacturing process where a heated tube of plastic (parison) is placed inside a mold, and compressed air is blown into it to expand the plastic against the mold walls, forming a hollow container. This process is commonly used for bottles, drums, and large hollow containers. While injection molding is preferred for 5-gallon pails, blow molding is used for certain container designs, fuel tanks, and larger drums where seamless construction is required.