Chemically Bonded Sand Casting

Sand is bound together around a pattern, which is designed in the shape of the component to be made – the pattern is removed and molten metal is poured into the cavity. The pattern may be re-used and the sand can generally be recycled.

Chemically Bonded sand moulds are created using a wood, metal, or plastic pattern. Sand is mixed with a binder and hardener in a high-speed mixer. This sand is deposited into a box containing the pattern and all essential gating, risers and chills for pouring. This sand mixture sets hard in a few minutes and the mould is removed from the pattern. Cores for forming internal passages in the castings may be made using the same process. The moulds are then closed and are ready for pouring.

Used for most market sectors for producing large castings due to the stability of the moulds.