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Sand casting

Forming process where a sand mold made of green sand is used to create a molded product.

Beskrivning
Illustration of Sand casting

The process

Two separate mold halves are made by covering two master molds with green sand. The molds are vibrated to ensure that all voids are filled and subsequently optionally pressed to create more resistant mold halves. Inlet and other details necessary for an adequate casting is then machined out of one or both mold halves. The dies are then assembled to complete the form and cores are added if required. Then the mold is filled with molten metal, which on solidification is freed from the sand mold usually with a shaker or vibratory rod.

In cases where the part has a flat side one mold may be sufficient which greatly simplifies the process.