Investment casting process for hollow components
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United States of America Patent
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Mar 1, 2016
Grant Date -
Jun 9, 2011
app pub date -
Dec 7, 2010
filing date -
Dec 8, 2009
priority date (Note) -
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Abstract
An investment casting process for a hollow component such as a gas turbine blade utilizing a ceramic core (10) that is cast in a flexible mold (24) using a low pressure, vibration assisted casting process. The flexible mold is cast from a master tool (14) machined from soft metal using a relatively low precision machining process, with relatively higher precision surfaces being defined by a precision formed insert (22) incorporated into the master tool. A plurality of identical flexible molds may be formed from a single master tool in order to permit the production of ceramic cores at a desired rate with a desired degree of part-to-part precision.
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