Injection moulding is a manufacturing process for producing parts by injecting material into a closed mould. Injection moulding can be performed with a host of materials, including metals, glasses and – in our case – thermoset elastomers and polymers. Parts to be injection moulded must be carefully designed to facilitate the moulding process. The material used for the part, the desired shape and features of the part, the material and design of the mould, and the properties of the moulding machine must all be taken into account. It is essential to consider the quantity of parts required and the life of the tooling. This is because injection tooling and presses are more complex, and therefore more expensive to set up and run, than other moulding techniques. Therefore, small batches of parts may not be cost-effective if manufactured by injection moulding.