2K injection moulding or ‘two-shot’ injection moulding consists of processing two different polymers (or two different colours of one polymer) into an end product by means of one injection moulding process. This technology enables several functions to be integrated into an injection moulded product.
One of the major advantages of 2K injection moulding is that the polymer to be injected is still hot and has not shrunk yet. This virtually excludes the risk of burrs being formed on the second component. In addition, the surface is still ‘virginally’ clean, enabling good molecular adhesion.
Another significant advantage is the cycle time gained, the constant process and the fact that manual insertion is not required, thus avoiding the risk of damaging the first component.