2-shot injection moulding

The two-shot injection moulding process combines two different materials in a single automated cycle that can also include colouring. This results in highly functional components with specifically combined properties – such as hardness and elasticity, transparency and strength, or media resistance and flexibility.

Common use-cases include silicone with thermoplastic, silicone metal combinations, or silicone components made from different Shore hardnesses.

Hard-soft combinations with TPE are also among the frequently used material pairings. The materials are injected sequentially or simultaneously into a specially designed mould and subsequently form a permanent bond – mechanically, chemically, or thermally anchored. Compared to the single-component process, two-shot injection moulding reduces the risk of assembly errors – a crucial advantage in complex components.