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Variations

Green-Sand Molding

A moist, plastic, rammable refractory mixture is used to make the mold. After ramming, removal of the pattern, and finishing, the mold is filled with metal while still in the damp, or green, state. This process is the most economical and is applicable to all but the largest castings.

Dry-Sand Molding

Similar to green-sand molding except that the molds are baked or dried before pouring. Usually, it is employed for castings of large metal and core weights.

Cold-Cure Molding

It uses various organic and inorganic binders to chemically bond the sand. These binders are blended into the sand immediately before it is placed on the pattern. The speed of chemical hardening can be regulated. After hardening, the pattern is removed from the mold. This process is predominantly used on large castings, although applicable to all sizes.

Shell Molding

We refer the reader to the shell mold casting section.

Source: Bralla, Design for Manufacturability Handbook.