Primarily Aluminum with some Copper Base and Cast Iron. Limitation mainly foundry capabilities. To 100 lbs. Is normally less expensive than sand casting for 100's part or a few 1000 parts. Limited applicability for ferrous metals.
Softened plastic is drawn to pattern.
Sand is backfilled. Used for medium to med high volumes. These are removed from pattern, assembled with or without cores, and metal is poured into the resultant cavitites Most all Castable Metals Normal maximum 550 sq. Widely used for cores. Various materials can be used.