With compression moulding, a slug of material is typically weighed and loaded (or automatically dosed) into the heated open mould cavity. Machines are usually vertical presses and tools are relatively simple in design.
The tool is then closed, and high load applied, forcing the material to spread and fill the cavity detail. Once the material has cured, the mould is opened, and the moulding is removed. Any excess flash is removed and reused. Materials include specialist thermoset grades, PVC and rubber.
Typical applications are the production of electrical sockets, isolators and connector blocks.
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