Casting shell with grain selector support
AssigneeRtx Corporation
InventorsMarkian Stephan Blazejowskyj, Carl R. Verner, Steven J. Bullied, Kevin James Pappas
Life of this patent
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Abstract
A casting shell has: a part cavity shaped for casting the part; a starter/selector cavity below and connected to the part cavity; a connector cavity between the starter/selector cavity and the part cavity; and a support cavity. The support cavity has: a post section; a first linking section linking the post section to the starter section of the starter/selector cavity; and a second linking section linking the post section to the connector cavity, the second linking section having a portion descending from the post section toward the connector cavity.
Claims20
A casting shell for casting a part, the casting shell comprising:
- a part cavity shaped for casting the part;
- a starter/selector section below the part cavity and comprising:
- a starter block section having a starter block cavity;
- and
- a selector section extending upward from the starter section toward the part cavity and having a selector passageway;
- a connector section having a connector cavity between the selector passageway and the part cavity;
- and
- a support section comprising:
- a post section having a post passageway;
- a first linking section linking the post section to the starter block section and having a first linking passageway;
- and
- a second linking section linking the post section to the connector section, the second linking section having a second linking passageway having a portion descending from the post passageway toward the connector cavity.
A casting shell for casting a part, the casting shell comprising:
- a part cavity shaped for casting the part;
- a starter/selector cavity below and connected to the part cavity and comprising:
- a starter block cavity;
- and
- a selector passageway extending upward from the starter section toward the part cavity;
- a connector cavity between the selector section passageway and the part cavity;
- a support cavity in communication with the starter block cavity;
- and
- means for preventing grain structure from propagating from the support cavity into the part cavity.
A method for casting a part in casting shell, the casting shell comprising:
- a part cavity shaped for casting the part;
- a starter/selector cavity below and connected to the part cavity and comprising:
- a starter cavity;
- and
- a selector passageway extending upward from the starter cavity toward the part cavity;
- a connector cavity between the selector passageway and the part cavity;
- and
- a support section comprising:
- a post passageway;
- a linking passageway linking the post passageway to the connector cavity,
- the method comprising:
- introducing molten alloy to the shell;
- cooling the alloy so that a solidification front passes relatively upward;
- the solidification front passing upward in the starter cavity and selector passageway simultaneously with passing upward in the post passageway;
- and
- the solidification front passing from the selector passageway to the linking passageway so as to prevent grain structure from propagating from the post passageway into the part cavity.
Dependencies are inferred from the claim text.