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Patent Searching and Data


Title:
HOTPRESS FURNACE
Document Type and Number:
Japanese Patent JPH10332274
Kind Code:
A
Abstract:

To prevent vapor or gas leaked into an inner furnace space from adhering to a heat insulation member or a side wall thus avoiding the contamination of the inside of the furnace by covering a gap defined between a die and a punch with a cover, discharging gas present in this inner space to the outside of the furnace directly, and providing means for introducing a carrier gas into the inner furnace space.

A material to be treated W is filled in a treatment space S1, a cover 4 and push rod 12 are set at given positions, and a furnace 1 is closed. A main gas discharge system 7 and an inner gas discharge system 5 are operated. When the degree of vacuum in an inner furnace space S3 and the treatment space S1 reaches a given degree of vacuum, a valve 72 of the main gas discharge system 7 is closed. While continuing the operation of the inner gas discharge system 5, the valve 62 of a gas introduction system is opened to introduce a carrier gas X into the inner furnace space S3 outside the cover 4. While applying a pressing force by way of a push rod 12, electricity is supplied to a heater 10 to start the heat treatment of the material W to be treated. Upon completion of the above-mentioned degassing process, the valve 62 is closed to stop the introduction of the gas, the main gas discharge system 7 is operated, and the supply amount of electricity to the heater 10 is increased to fire the material W to be treated.


Inventors:
NAKAMU EIJI
YAMAUCHI IPPEI
TAKEDA MASAO
Application Number:
JP14526097A
Publication Date:
December 15, 1998
Filing Date:
June 03, 1997
Export Citation:
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Assignee:
SHIMAZU MEKUTEMU KK
International Classes:
F27B17/00; (IPC1-7): F27B17/00
Attorney, Agent or Firm:
Kazuhiro Akazawa