Method and apparatus for casting aluminum by casting mold

摘要

An aluminum casting process using a casting mold in which after the cavity ( 25 ) is filled with an inert gas, magnesium is introduced in to the cavity to have a magnesium layer ( 58 a) deposited on the cavity wall. Then, nitrogen gas is introduced into the cavity to form magnesium nitride ( 58 b) on the surface of the magnesium layer after the cavity wall is heated to a specific temperature. Then, molten aluminum is supplied to have an aluminum casting molded, while the surface of the molten aluminum ( 39 ) is reduced with magnesium nitride. This makes it possible to form magnesium nitride within a short time and decrease the amount of nitrogen gas as required.