Method for forming cored passageways within cast metal articles

Details Method for forming cored passageways within cast metal articles Method for forming cored passageways within cast metal articles

1992-01-16

1993-04-13

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

164365, B22D 2900

Patent

active

052013570

ABSTRACT:
A sleeve of woven heat resistant material is axially compressed (22) to enlarge its cross-sectional area and perimeter. A support element (24) is disposed within the sleeve (22) to support it in its enlarged perimeter condition (26). The sleeve-covered support element (18) is then disposed in a cavity (14) of a casting mold (12) and molten metal (36) is cast into the cavity (14) and around the sleeve-covered support element (18). The molten metal (36) is allowed to solidify to form a cast article (16). The support element (24) is then withdrawn from within the sleeve (22), leaving the sleeve (22) within and adhered to the walls of the passageway (20) of the article in the expanded perimeter condition (26). A tension force A is applied to the sleeve (22) forcing it to stretch into a smaller cross-sectional area and perimeter (28) and causing the sleeve (22) to detach from the casting (16) for easy removal.

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