| 摘要 |
A centrifugal casting machine includes a plurality of split centrifugal molds which are successively brought to a casting station in which the molds are closed, clamped together and rotated rapidly while molten metal is fed through a central sprue to mold cavities therein. For feeding the molten metal, a vacuum chamber is provided at the casting station above the mold, and a feed pipe leading to a reservoir of molten metal extends into the vacuum chamber through a nozzle which discharges into a funnel communicating with the central sprue of the mold. Means are provided to create a vacuum condition within the vacuum chamber, the funnel, nozzle and the mold cavities when the mold is closed and clamped, whereby the molten metal is drawn by a siphoning action through the feed pipe and discharged from the nozzle into the mold cavities. The feed flow of the molten metal is accomplished solely by the vacuum condition which is timed to feed a selected charge of molten metal to the mold cavities.
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