The two basic molds are: Expendable mold and permanent mold.
Molding is a process where a rigid frame (mold) is being used to manufacture by shaping liquid or pliable raw materials. However, molding is synonymous to casting; casting is a process where a liquid metal is delivered into a mold which contains a hollow cavity of the intended shape.
Expendable mold casting can be classify as sand, plastics, plaster which make use of non-reusable or temporary molds while Permanent mold casting is a metal casting process that use reusable molds.