What is plastic injection moulding?
Plastic injection moulding refers to the manufacturing process where heated plastic is pressured into a mould to form different parts and products, from garbage bins to microscope slide cover slips.
The key benefit of plastic injection moulding is that it allows for high production outputs of both complex and simple parts.
The process requires a moulding machine where plastic granules are poured into a hopper and are then heated through the machine and injected into a pressured mould, often called a tool. The plastic is then ejected from the mould and the injection repeated.
Tools are made from steel and aluminium alloys to deal with the heat and high pressure of moulding and also so they can manage high volume production.
Most thermoplastics can be used in injection moulding, including common plastics such as Nylon, Polycarbonate, Polypropylene and Polystyrene. Plastic injection moulding machinery uses different temperatures and pressures depending on the material used and the product being made.