CASTING A METAL OBJECT

摘要

A method of casting a metal object in a mould, comprises establishing a mould (209) within a mould box (202) containing particulate material (208). The mould box is positioned within a casting chamber (103) and a crucible (122) in the chamber is charged with metal (406). While the mould box and said crucible are located within the chamber, air is evacuated from the chamber. The metal within the crucible is heated and melted, and either before or after melting, a non-oxidising gas is then introduced into the casting chamber. A vacuum is applied directly to the mould box for assisting a flow of molten metal into the mould, while the molten metal is poured from the crucible into the mould under the non-oxidising gas atmosphere.