Title:
COOLING GAS PASSAGE SWITCHING EQUIPMENT FOR VACUUM HEAT TREATMENT FURNACE
Document Type and Number:
WIPO Patent Application WO/2006/030504
Kind Code:
A1
Abstract:
A cooling gas passage switching equipment for a vacuum heat treatment furnace is provided with a cooling chamber, which surrounds a cooling area wherein a work to be treated is left at rest, and a gas cooling/circulating equipment, which cools and circulates gas which passes through the cooling chamber. The cooling gas passage switching equipment cools the heated work to be treated by using pressurized circulating gas. The equipment is provided with a fixed separating board by which the cooling chamber and the gas cooling/circulating equipment are separated, and a slidable shielding board which is driven to slide along the surface of the fixed separating board. The fixed separating board has a suction opening and a jetting opening on the suction port and the jetting port of the gas cooling/circulating equipment to independently communicate. The slidable shielding board has a shielding part which partially shields the suction opening and the jetting opening of the fixed separating board. Thus, directions of the gas passing through in the cooling chamber are alternately switched.
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Inventors:
KATSUMATA KAZUHIKO (JP)
NAKAHARA TAKUHIRO (JP)
NAKAHARA TAKUHIRO (JP)
Application Number:
PCT/JP2004/013503
Publication Date:
March 23, 2006
Filing Date:
September 16, 2004
Export Citation:
Assignee:
ISHIKAWAJIMA HARIMA HEAVY IND (JP)
KATSUMATA KAZUHIKO (JP)
NAKAHARA TAKUHIRO (JP)
KATSUMATA KAZUHIKO (JP)
NAKAHARA TAKUHIRO (JP)
International Classes:
F27D9/00; (IPC1-7): F27D9/00
Foreign References:
| JPH11153386A | 1999-06-08 | |||
| JPH05230528A | 1993-09-07 | |||
| JPH051887A | 1993-01-08 | |||
| JPS6115079A | 1986-01-23 |
Other References:
See also references of EP 1801529A4
Attorney, Agent or Firm:
Hotta, Minoru (4F Kenchiku-kaikan, 26-20, Shiba 5-chom, Minato-ku Tokyo 14, JP)
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