Patent ID: 9744588
Date: 2017-08-29
CPC Classifications: B22D,F27B,F27D

Claim:
1. A melting furnace for producing metal, comprising: a hearth for holding molten metal formed by melting raw material, a mold in which the molten metal is poured, the mold comprising: an extracting jig for extracting an ingot cooled and solidified downwardly, which is provided below the mold, a cooling member for cooling the ingot extracted downwardly of the mold, and an outer case for keeping the hearth, the mold, the extracting jig, and the cooling member separated from the air, wherein the ingot has a surface, wherein the cooling member is provided between the outer case and the ingot, while the cooling member extends along the extracting direction of the ingot with a certain gap from the ingot surface, wherein the melting furnace for melting metal is an electron beam furnace, and wherein the primary cooling portion comprises an upper wall of the mold having a thickness increasing portion in which thickness of the upper mold wall increases in an upper direction of the wall, and wherein the secondary cooling portion comprises a lower wall of the mold having a parallel portion in which thickness of the lower mold wall is constant.