Injection Blow Moulding is used to produce large quantities of hollow parts which can be used for storage or sale of food products. It uses materials such as Polyethylene, Polypropylene and Polyvinyl Chloride to produce a strong, hygienic and lasting product that is also able to be washed and reused when required.

In order to create a part using Injection Blow Moulding, there are three parts to the process:

• Injection: Here, the material is injected into the mould using an extruder barrel and screw, which melts the resin as it passes through the screw, with the resin then being extruded through a nozzle and into the mould, which is also heated. The shape of the mould is influenced by the external geography of the part, with a metal core being used to create the hollow shape.
• Blowing: The mould itself is allowed to open and the rod inside is rotated, which then allows compressed air into the mould inflating the resin and producing the desired shape.
• Ejection: After cooling the mould is opened and ejected by stripping the part from the core rod.