sand cast·ing | ˈsand ka-stiŋ
verb
A casting method in which tempered sand is packed onto wood or metal pattern halves and then removed from the pattern, before metal is poured into the resultant cavities and the mold is broken to remove castings
For hundreds of years, sand casting was the most popular of all casting methods. Sand casting still plays an important role in the production of large metal forms (typically iron, but also bronze, brass, and aluminum).