Insert Moulding

In the context of plastic moulding, an “insert” is an object that could be made of practically any material – metal, glass, ceramic, plastic, etc – around which a plastic part is moulded. Inserts are placed in the mould cavity before the plastic is injected, thereby forming a part with one or many objects sheathed within. Whether for encapsulating electrical and electronic components, structural reinforcements, or other functional inserts such as bushings, connectors, and threaded fasteners, insert moulding has a wide array of applications.

Although insert moulding requires more complicated moulds and a greater degree of accuracy in tolerances and process parameters, the benefits are well worth it.

Greater flexibility in part design, thanks to limitless material combinations and configurations
Far superior part strength, with seamless parts that combine the strength of the insert and the plastic material
Reduced part weight, volume, and complexity, through the elimination of appendages such as fasteners
Enhanced part reliability owing to more precise alignment, with benefits such as shock and vibration resistance
Cost savings through fewer manufacturing steps, reduced labour costs, and faster time-to-market

Insert moulding shares a lot in common with in-mould labelling, and is quite different from overmoulding, both of which are among the services we offer. Want to know whether insert moulding can add value to your next project, or existing part redesign? Get in touch.