Patent ID: 6408929
Filing Date: 2002-06-25
Classification: B22D

Abstract:
An apparatus for precision casting of directional solidified castings, said apparatus comprising:a melting and casting device having a closed chamber for creating a protective atmosphere of either vacuum or protective gases; a rotatable mold supported in said chamber, said mold having a central gate and a plurality of mold cavities extending from the gate towards an outer circumference (Da) of the mold, said mold having a rotary drive for creating centrifugal casting; a heating device for preheating said mold, said heating device being relatively movable between a position within said gate and outside said gate and creating a temperature gradient falling from the gate towards said outer circumferences of the mold; the mold being formed of a material or a material combination with a coefficient of thermal conductivity lower than that of copper; a motion device for generating said relative motion of said heating device.