Shaped core for cast cooling passages and enhanced part definition
AssigneeUnited Technologies Corporation
InventorSteven W. Burd
Life of this patent
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Abstract
A method for casting a workpiece comprising the steps of applying a protective coating to a base core the base core comprising, a metal strip comprising a generally planar expanse, a plurality of tabs arranged in a pattern upon the metal strip each of the tabs comprising a base end, a terminus end, and a tab shaft extending from the base end to the terminus end wherein each of the tabs is angularly displaceable about each the base end of the tabs, injecting a molding substance about the tabs of the base core, encapsulating the base core in a shell, removing the molding substance, casting the base core, and removing the base core.
Claims18
A base core for use in casting cooling passages in a workpiece comprising:
- a metal strip comprising a generally planar expanse;
- a plurality of tabs arranged in a pattern upon said metal strip each of said tabs comprising:
- a base end;
- a terminus end;
- and
- a tab shaft extending from said base end to said terminus end;
- wherein each of said tabs is independently angularly displaceable about each said base end of said tabs and wherein said base-core is bent to form a hard back core.
A method for casting a workpiece comprising the steps of:
- applying a protective coating to a base core said base core comprising:
- a metal strip comprising a generally planar expanse;
- a plurality of tabs arranged in a pattern upon said metal strip each of said tabs comprising:
- a base end;
- a terminus end;
- and
- a tab shaft extending from said base end to said terminus end;
- wherein each of said tabs is angularly displaced about each said base end of said tabs;
- injecting a molding substance about said tabs of said base core;
- encapsulating said base core along with the molding substance in a shell;
- removing said molding substance;
- casting molten metal about said base core;
- and
- removing said base core.
Dependencies are inferred from the claim text.