Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould… Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould… Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould… Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould… Casting is a process of metal smelting and proce-ssing, usually using the metal's gravity to cast in the mould…