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US 6,347,660 B1Granted
Multipiece core assembly for cast airfoil
AssigneeHowmet Research Corporation
InventorsWilliam E. Sikkenga, Arthur W. Grumm
Life of this patent
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AssigneeHowmet Research Corporation
InventorsWilliam E. Sikkenga, Arthur W. Grumm
Estimating the term…
A multi-wall ceramic core assembly and method of making same wherein a plurality of individual thin wall, arcuate (e.g. airfoil shaped) core elements are formed in respective master dies to have close tolerance mating locating features that substantially prevent penetration of molten metal between the interlocked features during casting, the individual core elements are fired on ceramic supports to have integral locating features, the prefired core elements are assembled together using the locator features of adjacent core elements, and the assembled core elements are held together using a fugitive material. The multi-wall ceramic core assembly so produced comprises the plurality of spaced apart thin wall, arcuate core elements and located by the mated close tolerance locating features.
A method of making a multi-wall ceramic core assembly for casting an airfoil with internal cooling passages, comprising forming a plurality of individual arcuate core elements comprising ceramic material and configured to form the cooling passages in the airfoil, firing the core elements, and assembling the fired core elements by mating male and female locator features disposed between adjacent core elements and integral with said adjacent core elements.
A ceramic core assembly for casting an airfoil with internal cooling passages, comprising a plurality of spaced apart arcuate, fired ceramic core elements configured to form the cooling passages in the airfoil and located relative to one another by mated male and female locator features disposed between adjacent core elements and integral therewith.
Dependencies are inferred from the claim text.