Injection Moulding of Plastics

Injection moulding is a process for producing plastic parts by injecting molten plastic material into a mould. Injection moulding can be done with a host of materials mainly including metals known as the die-casting process, glasses, elastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed using a helical screw and injected into a mould cavity, where it cools and hardens to the shape of the cavity. After a product is designed, usually by an industrial designer or an engineer, moulds are made by a mould-maker (or toolmaker) usually either of steel or aluminium precisely to form the features of the desired part.