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Title:
INVESTMENT CASTING CORE COMBINATION, PATTERN, SHELL, CORE ASSEMBLY AND METHOD FOR FORMING CORE
Document Type and Number:
Japanese Patent JP2008279506
Kind Code:
A
Abstract:

To provide a refractory metallic core to accommodate differential thermal expansion between a feed core and the refractory metallic core.

An investment casting core combination includes a metallic casting core and a ceramic feedcore. A first region of the metallic casting core is embedded in the ceramic feedcore. The metallic casting core includes a plurality of body sections. The first region is along at least some of the body sections. The metallic casting core includes a plurality of springs spanning gaps between adjacent body sections and unitarily formed therewith.


Inventors:
LUCZAK BLAKE J
DEVORE MATTHEW A
Application Number:
JP2008114836A
Publication Date:
November 20, 2008
Filing Date:
April 25, 2008
Export Citation:
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Assignee:
UNITED TECHNOLOGIES CORP
International Classes:
B22C9/04; B22C9/10; B22C9/24; F01D5/28; F02C7/00
Domestic Patent References:
JP2003181599A2003-07-02
JP2005118884A2005-05-12
JP2006026742A2006-02-02
JP2003181599A2003-07-02
JP2005118884A2005-05-12
JP2006026742A2006-02-02
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
Tomioka Kiyoshi