US 2019/0240726 A1Published application

Integrated casting core-shell structure for making cast component with novel cooling hole architecture

AssigneeGeneral Electric Company

InventorsGregory Terrence GARAY, Meredith DUBELMAN, Xi YANG, Tingfan PANG, Michael Scott COLE, Brian David PRZESLAWSKI, Douglas Gerard KONITZER, Nicole BARBA, Kirk GALLIER, Brian KEITH

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Abstract

The present disclosure generally relates to integrated core-shell investment casting molds that provide tongue or groove structures corresponding, respectively, to groove or tongue structures in the surface of the turbine blade or stator vane, including in locations that are otherwise inaccessible. The groove and tongue structures also provide a pathway to restrict cooling flow between turbine blades to the flowpath.

Claims12

Dependent claims

A method for fabricating a ceramic mold, comprising:

(a) contacting a cured portion of a workpiece with a liquid ceramic photopolymer;
(b) irradiating a portion of the liquid ceramic photopolymer adjacent to the cured portion through a window contacting the liquid ceramic photopolymer;
(c) removing the workpiece from the uncured liquid ceramic photopolymer;
and
(d) repeating steps (a)-(c) until a ceramic mold is formed, the ceramic mold comprising:
(1) a core portion and a shell portion with at least one cavity between the core portion and the shell portion, the cavity adapted to define the shape of a cast component upon casting and removal of the ceramic mold, and
(2) a plurality of inward protrusions protruding inward from the shell into the at least one cavity, wherein each inward protrusion defines a groove in the cast component upon removal of the mold.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/887,601Filed 2 Feb 2018
Published: 8 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification38 codes

F01D 5/22
Blades: blade-to-blade connections, e.g. for damping vibrations
B28B 1/001
Producing shaped prefabricated articles from the material: rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating…
B28B 7/342
Moulds, cores, or mandrels of special material, e.g. destructible materials: which are at least partially destroyed, e.g. broken, molten, before…
B28B 7/346
Moulds, cores, or mandrels of special material, e.g. destructible materials: manufacture of moulds

Family

US 11,130,170 B2Related patent
US 2019/0240726 A1This patent

From the US filing history. Foreign family members aren’t listed.

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