Plaster casting - according to the Tempocast® process

The Tempocast plaster casting process is perfect for making die casting similar prototypes in aluminium, magnesium or zinc. Furthermore small batch- and pilot productions of typical 50-1.500 pieces are ideal for our process.

Why Tempocast?

Prototypes can be manufactured within only 2-4 weeks. Achievable tolerances and surface finish is very similar to die casting parts. Parts can be designed with local wall sections down to only 1 mm. Small batch productions can be produced with maximal flexibility From same tooling both aluminium, magnesium and zinc parts can be produced Tool adjustments can be carried out in the existing tooling – very quick and cost attractive Part sizes ranging from app. 10x10x10 mm to 1.500x1.500x1.000 mm

The principle of plaster casting

Two negative mould halves out of plaster, form the cavity in which the molten metal is poured. Adding a number of cores makes it possible to produce even complex parts.

Tooling

Using high precision CNC machining a set of plastic mould halves are produced. These mould halves are then converted into a set of positive rubber moulds which serve as production tool. Based on this soft rubber tool an unlimited number of plaster moulds can be made. The plaster moulds are then assembled and fluid metal is poured into the cavity. After casting the parts are cleaned and a number of post treatments can be offered.

Design rules

In order to remove the dried plaster moulds from the soft rubber tooling the mould needs to have draft angels. Furthermore the part needs to have a mould split. The same design rules are valid for pressure die casting. However in our process we can sometimes compromise on the draft angels and undercut issue, so please contact us for further information about this.