Patent ID: 6546995
Filing Date: 2003-04-15
Classification: B22D

Abstract:
A metal casting unit for use in apparatus wherein molten metal is forced through the unit to cast a body of metal therein, comprising,a molten metal casting mold defining an open ended mold cavity having a peripheral wall circumposed thereabout, an entry end portion, a discharge end opening, and an axis extending between the discharge end opening and the entry end portion of the cavity, the mold having a series of holes therein which are circumposed about the axis of the cavity in the peripheral wall thereof for discharge of liquid coolant onto the body of metal and consequent extraction of heat from respective angularly successive part annular portions of the body of metal arrayed about the axis of the cavity at the circumference of the body of metal, as the body emerges from the cavity at the discharge end opening thereof, and means connected with the series of holes for varying the rate at which heat is extracted from one part annular portion of the body of metal to another part annular portion thereof.