Moulding apparatus for manufacturing bladed members from powder

Details Moulding apparatus for manufacturing bladed members from powder Moulding apparatus for manufacturing bladed members from powder

1975-11-24

1976-08-03

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

425117, 425123, 425127, 425128, 249 95, 249 96, B29C 600, B30B 1102

Patent

active

039726622

ABSTRACT:
The invention is concerned with apparatus for manufacturing gas turbine engine components e.g. guide vanes and blades, in dense silicon nitride starting with silicon nitride in a powder form.
Guide vanes are usually in the form of an aerofoil portion and two shroud portions and according to the invention, the aerofoil portion is made in a first mould by hot pressing a mixture of silicon nitride powder and a fluxing agent, such as magnesia. The formed aerofoil is placed in a second mould so that each end extends partly into a space which is to be filled with a further mixture of silicon nitride powder and a fluxing agent. The further mixtures are hot pressed both to form the shroud portions and to amalgamate the shroud portions with the aerofoil portion.
Features, such as, flanges and webs can be formed in the shrouds during the moulding process or they can be machined into the shrouds after the vane is removed from the second mould.

REFERENCES:
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patent: 3555597 (1971-01-01), Meadows
patent: 3599291 (1971-08-01), Alexander
patent: 3659972 (1972-05-01), Garrett

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