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US 7,306,026 B2Granted
Cooled turbine airfoils and methods of manufacture
AssigneeUnited Technologies Corporation
InventorRobert L. Memmen
Life of this patent
Estimating the term…
Abstract
An investment casting pattern is formed by installing a first core to a first element of a molding die to leave a first portion of the first core protruding from the first element. After the installing, the first element is assembled with a feed core and a second element of the molding die so that the first portion contacts the feed core. A material is molded at least partially over the first core and the feed core. The first portion has one or more surface area enhancements.
Claims14
A method comprising:
- forming an investment casting core precursor having a spine and a plurality of tine precursors;
- and
- after forming the tine precursors, forming a plurality of surface enhancement recesses in the tine precursors.
A method for forming an investment casting pattern comprising:
- forming at least one first core, the forming including:
- forming an investment casting core precursor having a plurality of tine precursors;
- and
- after forming the tine precursors, forming a plurality of surface enhancement recesses in the tine precursors;
- installing the first core to a first element of a molding die to leave tines of the first core protruding from the first element;
- after said installing, assembling the first element with a feed core and a second element of said molding die so that said tines contact the feed core;
- and
- molding of a material at least partially over the first core and feed core.
5 more elements
Dependencies are inferred from the claim text.