To provide a method and an apparatus for producing a copper or a copper alloy ingot having no shrinkage cavity and smooth surface and no fold and particularly, the method and the apparatus for producing the high purity copper ingot having ≥99.9999 wt.% purity and no shrinkage cavity and smooth surface and no fold.
This method is performed by heating so as to have such temperature gradient as to become high temperature from the bottom wall of a mold toward the upper direction and pouring molten copper or molten copper alloy into the mold arranging a cooling base seat at the bottom part and solidifying this molten copper or molten copper alloy into one direction. Then, the cooling base seat 4, the mold 1 laid on the cooling base seat 4 and a heating furnace 2 arranged surrounding the mold 1, are provided, and the heating furnace 2 can be controlled to the heating so as to have such temperature gradient as to become high temperature from the bottom part of the mold toward the upper part.
ISHIDA TOKUKAZU
FURUSHIBA YUTAKA
NOGAMI TAKASHI
KAKIMOTO AKIHIRO
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