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US 2020/0030872 A1Published application
Additively manufactured casting core-shell hybrid mold and ceramic shell
AssigneeGeneral Electric Company
InventorsXi YANG, Michael COLE, Michael BROWN, Gregory Terrence GARAY, Tingfan PANG, Brian David PRZESLAWSKI, Douglas Gerard KONITZER
Life of this patent
Estimating the term…
Abstract
The present disclosure generally relates to integrated core-shell investment casting molds that provide a filament structure corresponding to a cooling hole pattern in the surface of the turbine blade, stator vane, or shroud. The disclosure also relates to the forming of a ceramic coating on at least a portion of the shell of the core-shell casting mold.
Claims20
A method of fabricating a ceramic casting mold comprising:
- covering or plugging an opening in a ceramic core-shell mold with a cover or a plug, the ceramic core-shell mold comprising a core portion and a shell portion and at least one first cavity between the core portion and the shell portion;
- and
- coating at least a portion of the ceramic core-shell mold and the cover or plug with a second ceramic material.
A method of preparing a cast component comprising:
- covering or plugging an opening in a ceramic core-shell mold with a cover or a plug, wherein the core-shell mold includes at least a first cavity between a ceramic core and a ceramic shell;
- coating at least a portion of the ceramic core-shell mold and the cover or plug with a ceramic outer shell formed of a second ceramic material;
- and
- pouring a molten metal into the first cavity.
1 more element
A ceramic casting mold comprising:
- a ceramic core portion, a first ceramic shell portion, a ceramic cover, and a second ceramic shell portion at least partially covering the first ceramic shell portion and the ceramic cover, wherein the ceramic casting mold further comprises;
- at least one cavity between the ceramic core portion and the first ceramic shell portion, the cavity adapted to define the shape of the cast component upon casting and removal of the ceramic casting mold, wherein the mold further comprises a plurality of filaments joining the ceramic core portion and the first ceramic shell portion where each filament spans between the ceramic core and first ceramic shell portion, the filaments adapted to define a plurality of holes providing fluid communication between a cavity within the cast component defined by the ceramic core portion and an outer surface of the cast component upon removal of the mold.
Dependencies are inferred from the claim text.