PURPOSE: To reduce the man-hours for improving the quality and repairing the defect, in a producing method for a precision cast product applied to the high quality precision cast product necessary to the prevention of shrinkage cavity defect in a complicated shape.
CONSTITUTION: A mold 8 is arranged in a vacuum vessel 1, and after heating the mold, e.g. at 1500°C with a mold heating furnace 3, an SCS 13 material heated and melted at 1550°C in a melting furnace 2, is poured into the mold. Drawing-down of the mold is started at 5-100mm/min after passing 1min from the completion of the pouring, and the mold is drawn down at the fixed speed until the upper part of the casting comes out to the out of the heating furnace. When the solidification of the casting completes, the cast product is taken out into the air and cooled as it is.
SHIMOBATAKE YUKIROU
WATANABE KIYOSHI
FUJIMOTO SHIGEHISA
YAMAMURO SHIGEAKI
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