Patent ID: 7882887

Claim:
Apparatus for casting a composite metal ingot, comprising: an open-ended generally rectangular mold cavity having an entry end portion, a discharge end opening, and a movable bottom block adapted to fit within the discharge end and to move axially of the mold during casting; at least one cooled divider wall at the entry end portion of the mold to divide the entry end portion into at least two feed chambers; and a feeder for feeding metal for an inner layer to one of said at least two feed chambers and at least one additional feeder for feeding metal for at least one outer layer to at least one other of said feed chambers; wherein said at least one divider wall has a metal-contacting surface in use contacting said metal of said at least one outer layer, said surface being arranged at an angle sloping towards the mold center and sloping away from said metal of said outer layer in a direction of metal flow through said mold, said angle being larger at a center of said at least one divider wall than at positions adjacent to longitudinal ends of said at least one divider wall.