Patent ID: 6860318
Filing Date: 2005-03-01
Classification: B22D

Abstract:
1. Apparatus for the semi-continuous casting of molten aluminium to form an ingot in the mould of a casting machine, the apparatus comprising: a launder, a casting mould and feed means coupled to the launder and extends into the casting mould, wherein the feed means are connected to the underside of a tundish, the tundish is provided with an inlet member for admitting molten aluminium from the launder into the tundish, wherein a part of the tundish is located above the molten aluminium admitted into the tundish, and the tundish is provided with pressure-reducing means for lowering the absolute gas pressure in that part of the tundish located above the molten aluminium admitted into the tundish, and wherein the pressure-reducing means, during use, is able to produce an absolute gas pressure in a range from 0.50 to 0.97 bar in the part of the tundish located above the molten aluminium admitted into the tundish, and the casting mould has dimensions for casting an ingot with a thickness of 450 mm or more.