Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making articles of indefinite length
Patent
1982-06-21
1984-03-06
Hunt, Brooks H.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making articles of indefinite length
419 41, 264312, 425376B, 425381, B22F 302, B28B 2142, B28B 308, B29D 2304
Patent
active
044353596
ABSTRACT:
An apparatus (10) and method for fabricating tubes (26) from powders (32). A retractable, rotating mandrel (18) is disposed within a powder hopper (12) and circumscribed by a plurality of swaging dies (20). A flexible iris (14), disposed between the hopper (12) and the dies (20), reduces powder (32) loss.
As the mandrel (18) is withdrawn from the hopper (12), the dies (20) alternatingly expand and contract compacting the powder (32) in a compaction zone (48) about the mandrel (18) to form a tube (26). The resultant continuous tube (26) is withdrawn along with the mandrel (18).
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"A New Method for Compacting Metal or Ceramic Powders into Continuous Sections", by F. Emley and C. Deibel, Perspectives in Powder Metallurgy, vol. 1, Chapter 6, pp. 83-97, Plenum Press, New York, 1967.
"An Experimental Investigation of the Transverse Pressing of Metal Powders", by G. M. Zhdanovich, L. S. Boginskii and V. A. Sidorov, Soviet Powder Metallurgy and Metal Ceramics, vol. 17, No. 5 (185), pp. 347-350, May 1978.
Clatworthy Edward F.
Eiselstein Herbert L.
Smith, Jr. Darrell F.
Hunt Brooks H.
Huntington Alloys Inc.
Kenny Raymond J.
Steen Edward A.
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