Metal founding – Process – Shaping a forming surface
Patent
1996-09-26
1999-07-27
Ryan, Patrick
Metal founding
Process
Shaping a forming surface
164519, 164 35, 164516, B22C 902, B22C 904
Patent
active
059273798
ABSTRACT:
Methods and compositions for forming shells for investment casting and methods for casting metal articles using the shells are described. One embodiment of the method comprises serially immersing a pattern in at least one, and perhaps several different slurries, each of which slurries comprises refractory material and from about 0 to about 30 volume percent inorganic binder. This forms a facecoat and plural refractory backup layers about the pattern, the facecoat and at least one backup layer defining a shell. The facecoat and/or the shell is then infiltrated with a binder. Infiltrating the shell with a binder is a key feature of the present invention. Infiltration refers to any process whereby a binder can be introduced into the facecoat and/or the subsequent layers built up about the shell. One method of infiltrating the facecoat and/or layers with binder comprises immersing the pattern having refractory material into a slurry comprising a binder, including inorganic binders, organic binders, and mixtures thereof. The pattern then is separated from the shell, forming a shell having an internal void in the shape of an article to be cast. Molten metal is then introduced into the void and allowed to solidify.
REFERENCES:
patent: 2703913 (1955-03-01), Hinde et al.
patent: 3967003 (1976-06-01), Emblem et al.
patent: 4585618 (1986-04-01), Fresnel et al.
patent: 4925492 (1990-05-01), Kelkar et al.
patent: 5198152 (1993-03-01), Liimatta et al.
patent: 5304031 (1994-04-01), Bose
patent: 5407001 (1995-04-01), Yasrebi et al.
patent: 5511603 (1996-04-01), Brown et al.
patent: 5630465 (1997-05-01), Feagin
patent: 5678624 (1997-10-01), Sakurai
Kemp William Warren
Nikolas Douglas Gene
Springgate Mark Edwin
Sturgis David Howard
Yasrebi Mehrdad
Lin I.-H.
PCC Structurals, Inc.
Ryan Patrick
LandOfFree
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