| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high quality pressurized cast product by applying a reduction-casting method to a pressurize casting method of a die casting or a squeeze die casting, etc. SOLUTION: This reduction-casting method is such a method as to cast by applying the reduction-casting method, in which molten metal is poured into a cavity 15 in a casting part 12 while reducing oxidized film formed with the surface of the molten metal by allowing a reducing compound to contact with the molten metal in the cavity, to the pressurize-casting method of the die casting or the squeeze die casting, etc. Then, metallic gas and reactive gas are introduced into the cavity 15 by controlling a switch valve 20 which is opened/closed by receiving the molten metal pressure in the cavity 15 at the pressurize-casting time, and the metallic gas and the reactive gas are reacted in the cavity 15, and after generating the reducing compound in the cavity 15, the molten metal is poured into the cavity 15 to cast the cast product.
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