Injection moulding is the injection of hot molten plastic into a cavity, where it is cooled and turned into a solid product.
The process of Injection Moulding:
Injection moulding is simply granular plastic gravity fed from a holding tank, called a hopper, into a heated barrel. The granules are turned into a molten form and pushed through a nozzle, which rests against the mould.
This molten plastic enters the mould cavity through a gate and runner system, the mould remains cold so the molten plastic solidifies almost as soon as the mould is filled. Holding pressures from the injection unit are used to hold the material in the mould cavity to compensate for shrinkage.
Once cooled, the mould automatically opens and the moulded product is ejected, either onto a conveyor belt or is picked up by the robotic arm and placed into holding bins.