Patent ID: 7748434

Claim:
Apparatus for casting a composite metal ingot, comprising: an open-ended generally rectangular mold cavity having opposed longer side walls and opposed shorter end walls, an entry end portion, a discharge end opening, a movable bottom block adapted to fit within the discharge end opening and to move axially of the mold during casting; at least one cooled divider wall having opposite longitudinal ends with each end positioned at a different one of said opposed end walls, said at least one divider wall being positioned at the entry end portion of the mold to divide the entry end portion of the mold into at least two feed chambers and terminating above said discharge end opening of the mold, said at least one divider wall being positioned closer to one of said opposed longer side walls than the other; and means for feeding metal for an inner layer to one of said at least two feed chambers and at least one means for feeding another 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 for contacting said metal for said at least one outer layer, said surface facing said one of said opposed side walls that is closer to the divider wall, said surface being arranged at an angle to the vertical sloping away from said metal for said outer layer in a downward direction, and said angle increasing at different horizontal positions along said at least one divider wall from a smaller angle at a center of said at least one divider wall to larger angles at positions on said at least one divider wall approaching each said longitudinal end thereof.