Bespoke castings since 1862

Patterns are packed in Silica Sand mixed with Sodium Silicate inside steel Boxes, powder coating prevents sticking. In the final casting, all red will be metal and the black sand - so in this case there are internal cores to make separately.

The Sand is impregnated with Carbon Dioxide and becomes hard, the pattern removed and the inside coated to enhance the surface finish.

The coating is 'burnt off' to bind it to the sand mould, then the internal cores are added to complete this half of the mould.

The 2 completed halves of the mould are then brought together to complete the mould. Filters and pouring system are finally added before casting.

Moulds are secured with additional weights, metal cast from single crucible. Castings are left overnight to cool fully, then broken out of the mould and fettled to remove runners and dress.

At the customer, Diffuser castings are fully machined and then ready to be put back in their housings for reinstallation.