RADIOACTIVE SUBSTANCE CONTAINMENT VESSEL, AND RADIOACTIVE SUBSTANCE CONTAINMENT VESSEL PRODUCING DEVICE AND PRODUCING METHOD

WIPO Patent Application WO/2001/082308

A1

A metal billet used for hot expansion forming is of square shape in section on its front side as viewed in the press direction, and its diagonal length is not more than the inner diameter of a container. Further, the rear side as viewed in the press direction is circular in section and its diameter is substantially equal to the inner diameter of the container. This metal billet is heated to a press work temperature and then charged into a press forming container. And the metal billet is subjected to hot expansion forming while being centrally drilled by a drilling punch operated by a press pressure device, thereby forming a bottomed vessel for casks.

FUNAKOSHI YOSHIHIKO (JP)
TSUNEZUMI TAKESHI (JP)
MIZUNO NAOHIRO (JP)
TOKUNO KATSUHIKO (JP)
MATSUMOTO CHIKAYUKI (JP)
TAURA RYOUJI (JP)
SHIROGANE SHIGENORI (JP)
OHSONO KATSUNARI (JP)
MATSUOKA TOSHIHIRO (JP)

PCT/JP2001/002420

November 01, 2001

March 26, 2001

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JAPAN CASTING FORGING CORP (JP)
MITSUBISHI HEAVY IND LTD (JP)
FUNAKOSHI YOSHIHIKO (JP)
TSUNEZUMI TAKESHI (JP)
MIZUNO NAOHIRO (JP)
TOKUNO KATSUHIKO (JP)
MATSUMOTO CHIKAYUKI (JP)
TAURA RYOUJI (JP)
SHIROGANE SHIGENORI (JP)
OHSONO KATSUNARI (JP)
MATSUOKA TOSHIHIRO (JP)

B21C1/26; B21C23/01; B21C23/20; B21J5/10; B21J9/04; B21K21/06; G21C19/32; G21F5/00; G21F5/008; (IPC1-7): G21F5/00; G21F9/36; G21C19/32; B21K21/06; B21J5/00

JP2000009897A	2000-01-14
DE19852537A1	2000-05-18
JP2001083281A	2001-03-30
JPS5146670A	1976-04-21
JPH03106532A	1991-05-07
JPH026135U	1990-01-16
JPS54127859A	1979-10-04

See also references of EP 1193720A4

Sakai, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku, Tokyo, JP)

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