Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1994-01-06
1995-04-11
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
1641222, 164134, 164235, 164361, 164358, B22D 2704, B22C 904, B22C 908
Patent
active
054049300
ABSTRACT:
An improved mold for use in casting a metal airfoil has an airfoil mold cavity and a starter chamber. A lower end of the starter chamber is formed by a chill plate. A filter is disposed in the starter chamber between the airfoil mold cavity and the chill plate. When an airfoil is to be cast, molten metal is conducted into the starter chamber, into passages in the filter and into the airfoil mold cavity. The molten metal is solidified upward in the starter chamber from the chill plate and through the passages in the filter. The filter blocks migration of impurities from the starter chamber to the airfoil mold cavity as the metal solidifies in the starter chamber. As the molten metal begins to solidify in the airfoil mold cavity, the molten metal is solidified as a large number of columnar grain crystals which extend from the passages in the filter into the airfoil mold cavity. If a single crystal airfoil is desired, a single crystal selector may be provided between the starter chamber and the airfoil mold cavity.
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patent: 3815661 (1974-06-01), Carran et al.
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patent: 4353405 (1982-10-01), Kolakowski et al.
patent: 4591383 (1986-05-01), McGarry et al.
patent: 5020583 (1991-06-01), Aghajanian et al.
Monte Louis H.
Stanton Paul
Lin Kuang Y.
PCC Airfoils, Inc.
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