Core

Core Points : Core, Definition Cores are bodies of sand that form an opening or cavity in r through a cavity. There are two types of cores, green sand cores and dry sand cores. A dry sand core is composed of a special mixture of silica sand and a binding material. The core is rammed independently of the mould and baked in an oven to remove all moisture. The baked core is placed in the finished mould before the mould is closed for pouring. The green sand core is a body of sand projecting into a mould to form a cavity or opening in the casting when the molten metal is poured. The green s4nd core is formed by the pattern during the moulding process.