Ceramic core recovery method

Details Ceramic core recovery method Ceramic core recovery method

2007-07-24

2007-07-24

Ryan, Patrick Joseph (Department: 1725)

Metal founding

Process

Shaping a forming surface

C164S024000, C164S035000, C164S045000

Reexamination Certificate

active

11126272

ABSTRACT:
A method to recover wax from wax patterns used in investment casting using a lost wax technique without damaging incorporated ceramic cores is disclosed that includes subjecting the wax pattern to specific conditions. These conditions include chilling a casting tool including the wax pattern and ceramic cores such that a brittle transition temperature for the wax material is approached. Once chilled the wax pattern is subjected to brittle fracture release of the wax from the underlying ceramic cores without damage to those cores.

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patent: 5073696 (1991-12-01), Patillo et al.
patent: 5350002 (1994-09-01), Orton
patent: 6435256 (2002-08-01), Anderson et al.
patent: 2 260 284 (1993-04-01), None

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