Mould for casting components

Details Mould for casting components Mould for casting components

1992-09-08

1993-08-10

Rowan, Kurt C.

Metal founding

Means to shape metallic material

United particle type shaping surface

164350, 164363, B22D 4300, B22D 2500

Patent

active

052340473

ABSTRACT:
A ceramic shell mould (70) for casting a single crystal turbine blade comprises a plurality of article portions, (72), each of which has an article chamber (74) for defining the shape of a turbine blade, a plurality of selector portions (76), a plurality of starter portions (80) and a runner portion (84). The runner portion (84) comprises a first subsection (86) which has a central axis (87) arranged parallel to, and spaced from, the central axes (73) of the article portions (72) and a plurality of second subsections (90) which interconnect the first subsection (86) with the article portions (72). The second subsections (90) are arranged to make an acute angle with the first subsection (86) of the runner portion (84) and with the starter portions (80) so that the second subsections (90) may bend to allow relative movement between the first subsection (86) and the starter portions (80) to prevent the cast turbine blades falling off the mould. The second subsections (90) also have a small cross-sectional area to increase the amount of bending possible.

REFERENCES:
patent: 3724531 (1973-04-01), Erikson et al.
patent: 4057097 (1977-11-01), Lux et al.
patent: 4469161 (1984-09-01), Higginbotham et al.
patent: 5072771 (1991-12-01), Prasad

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