Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1976-12-09
1978-09-12
Schafer, Richard E.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75211, 75222, 264 63, 264111, B22F 314
Patent
active
041134800
ABSTRACT:
Parts are formed from metal powder by mixing the powder with a plastic medium comprising an organic binder dissolved in a solvent in which it is soluble at room temperature but in which it is substantially less soluble at a higher temperature such that the plastic binder becomes viscous at that temperature. Binder modifiers may be incorporated to promote mold release and promote healing of interfaces within the molded part and prevent the formation of drying cracks. The plastic mixture is injected under pressure into a closed die preheated to the above mentioned higher temperature, whereby the rejection of solvent and increase in viscosity of the plastic medium produces a compact sufficiently self-supporting to hold its molded shape and be ejected from the die. The compact is then dried to evaporate the remaining solvent, thus leaving interconnecting pores in the compact for the escape of gases resulting from subsequent burning out of the binder during the sintering operation.
REFERENCES:
patent: 2979401 (1961-04-01), Szymaszek
patent: 3222435 (1965-12-01), Mellen et al.
patent: 3285873 (1966-11-01), Bailey
patent: 3309434 (1967-03-01), Blum et al.
patent: 3330892 (1967-07-01), Herrmann
patent: 3346680 (1967-10-01), Bush
patent: 3796564 (1974-03-01), Taylor et al.
patent: 3859405 (1975-01-01), Horton
patent: 3953562 (1976-04-01), Hait et al.
Cabot Corporation
Phillips Joseph J.
Schafer Richard E.
Schuman Jack
LandOfFree
Method of injection molding powder metal parts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of injection molding powder metal parts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of injection molding powder metal parts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2382331