Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making composite or hollow article
Patent
1988-04-29
1990-06-19
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making composite or hollow article
419 48, 419 67, 419 68, B22F 700
Patent
active
049351982
ABSTRACT:
Method of and apparatus for powder-metallurgical manufacture of tubes or like elongated profiles, in which metal and/or metal alloy powder (3) is filled--if applicable with pre-compacting by means of vibrations or the like--into a thin-walled capsule, the latter is subsequently closed and cold and/or hot-pressed by means of universally acting isostatic pressure, and the thus obtained compact is further processed, especially extruded. For forming the tubular compact, the capsule filled with powder (3) after closing (cover 9; 9'; 9") and isostatic pressing is centrally pierced (hole 26) by means of a mandrel (4, 5) whereby the powder (3) is correspondingly radially compacted from the inside towards the outside. The capsule features a cylindrical outer casing (8), a bottom (14) and a cover (9; 9'; 9").
REFERENCES:
patent: 3615382 (1971-10-01), Manilla et al.
patent: 4575327 (1986-03-01), Borchert et al.
patent: 4602952 (1986-07-01), Greene et al.
patent: 4604252 (1986-08-01), Stigler
patent: 4722825 (1988-02-01), Goldstein
Avesta Nyby Powder AB
Lechert Jr. Stephen J.
LandOfFree
Method for the powder-metallurgical manufacture of tubes or like 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 for the powder-metallurgical manufacture of tubes or like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the powder-metallurgical manufacture of tubes or like will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2259207