Injection Moulding – The Basics

We have been moulding for over 20 years so we have an extensive knowledge of processes and materials.

Injection moulding is the process of taking granular plastic and making components from it by injecting the molten plastic into a mould.

The granular plastic is fed by gravity from a hopper into a heated barrel. As the granules are slowly pushed forward by a screw-type plunger, the plastic is forced into a heated chamber called the barrel where it is melted. As the plunger advances, the melted plastic is forced through a nozzle that seats against the mould sprue bushing, allowing it to enter the mould cavity through a gate and runner system. The mould remains at a set temperature so the plastic can solidify almost as soon as the mould is filled.

For a better understanding of the process take a look at the various videos on Youtube regarding the basics of injection moulding.

Related Pages