CASTING METHOD FOR SEMIMOLTEN METAL

摘要

PURPOSE:To highly precisely cast ingot of complex shape by passing it directly through a molten metal passage in a nozzle and a molten metal pouring area in a casting mold and casting the ingot while the pouring area of molten metal in the casting mold is evacuated. CONSTITUTION:The temperature of molten metal is controlled in a vessel of a manufacturing equipment 10 of semimolten metal to form semimolten metal 3b in such a stage that a solid and a liquid phase exist together. This metal is stirred and cast into a casting mold 6 through a nozzle 20. Then, a molten metal passage of the nozzle 20 is communicated ditectly with a cavity 30 in a molten metal pouring area of the casting mold 6 and the cavity 30 and branches 32 in the molten metal pouring area of the casting mold 6 are evacuated by a vacuum pump to cast the ingot. In this way, the ingot of complex shape can be cast highly precisely.