To Moulding methods.
Moulding is one of the ways of forming a rubber compound into a useful part.
A mould is usually made from metal, or some other material which can take the pressures and heat of the moulding process. Cavities are machined into the mould. These are negative images of the part to be made. There may be only one cavity or there can be a large number of cavities, depending on the requirements of the job. The rubber compound, which has all of the ingredients mixed into it to make it work, is placed in the mould cavity under pressure and heat.