Mold for casting a single crystal metal article

Details Mold for casting a single crystal metal article Mold for casting a single crystal metal article

1989-07-19

1990-07-10

Lin, Kuang Y.

Metal founding

Means to shape metallic material

United particle type shaping surface

1641222, B22C 904

Patent

active

049400738

ABSTRACT:
A single crystal selector has a passage into which a plurality of crystals grow from a starter cavity and from which a single crystal emerges into an article mold cavity. The single crystal selector passage includes a linear lower vertical portion which extends upwardly away from an end portion on the starter cavity. A linear vertical upper portion of the selector passage extends downwardly from a lower end portion of the article mold cavity. A single bend portion of the selector passage extends between the upper and lower portions of the selector passage. A support element extends upwardly from a lower section of the selector to an upper section of the selector to at least partially support a single bend section of the selector. The single bend portion of the selector passage has a generally circular cross sectional configuration with a diameter which is less than 0.25 inches. The single bend portion of the selector passage extends sidewardly for a distance which is at least 1.5 times the diameter of the selector passage.

REFERENCES:
patent: 3542120 (1970-11-01), Piearcey
patent: 4180119 (1979-12-01), Burd et al.
patent: 4475582 (1984-10-01), Giamei et al.
patent: 4548255 (1985-10-01), Reiner et al.

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