Airfoil Casting Methods
AssigneeUnited Technologies Corporation
InventorsP. Brennan Reilly, Lea D. Kennard
Life of this patent
Estimating the term…
Abstract
In the castings of a turbine element, a sheet casting core is assembled to a feedcore. The sheet casting core and feedcore are placed in a die. A sacrificial pattern material is molded over the casting core and feedcore to form a pattern including an airfoil. The sheet casting core extends from at or adjacent a trailing edge of the airfoil. The sheet casting core has a first array of open areas and a second array of portions interspersed with the open areas. A first portion of the die has a third array of projections contacting the second array.
Claims15
A method comprising:
- assembling a sheet casting core to a feedcore;
- placing the sheet casting core and feed core in a die;
- and
- molding a sacrificial pattern material over the sheet casting core and feedcore to form the pattern including an airfoil and the sheet casting core extending from at or adjacent a trailing edge of the airfoil, wherein:
- the sheet casting core has a first array of open areas and a second array of portions interspersed with the open areas;
- and
- a first portion of the die has a third array of projections contacting the second array.
A casting core and die assembly for molding an airfoil pattern having pressure and suction sides, the assembly comprising:
- a feedcore;
- a sheet casting core assembled to the feedcore;
- a die at least partially containing the feedcore and sheet casting core and including first and second surface sections shaped to respectively form the airfoil pattern pressure and suction sides;
- and
- means on the die and sheet casting core for forming an array of trailing edge slots open along one side of a pressure side and a suction side of an airfoil to be cast via the airfoil pattern.
Dependencies are inferred from the claim text.