Injection moulding

A high-volume process in which molten polymer, often short-fibre reinforced, is injected under high pressure into a closed metal mould, solidified and ejected. It provides tight tolerances and complex geometry at low unit cost once tooling costs are recovered.

Also known as: Injection molding

Related terms

Compression moulding

A moulding process in which a charge of material, such as sheet moulding compound or a preheated thermoplastic blank, is placed in a heated matched metal mould and formed under press pressure. It offers short cycle times and good surface finish and is widely used for automotive panels and electrical components.

Manufacturing processesComposites & laminatesAutomotiveIndustrialConstruction

Thermoplastic

A polymer that softens when heated and hardens again on cooling without chemical change, so it can be reshaped, welded or recycled. Thermoplastics range from commodity materials such as polypropylene and PVC to high-performance matrices such as PEEK used in advanced composites.

Resins & adhesivesMaterials science (general)Composites & laminatesAerospaceAutomotiveConstructionMarineGreen energyIndustrial

Bulk moulding compound

BMC

A dough-like moulding compound of short chopped fibres, filler and thermosetting resin, shaped by compression or injection moulding. BMC suits complex, detailed parts such as electrical housings, reflectors and valve components.

Composites & laminatesManufacturing processesAutomotiveIndustrial

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