Title:
FAR INFRARED RADIATION MULTISTAGE HEATING FURNACE FOR STEEL PLATES FOR HOT PRESSING
Document Type and Number:
WIPO Patent Application WO/2015/186599
Kind Code:
A1
Abstract:
Provided is a far infrared radiation multistage type heating furnace for steel plates for hot pressing provided with flexible far infrared radiation heaters that do not bend during heating from the Ac3 transformation temperature to 950°C. The far infrared radiation multistage heating furnace has multiple stages of heating units formed from a thermal insulation material disposed around the periphery thereof and accommodating steel plates for hot pressing, and far infrared radiation heaters disposed in the upper part and lower part of the heating units. A far infrared radiation heater (14-1) is mounted on a plurality of first metal bands (26) and is disposed substantially horizontally. The plurality of first metal bands (26) is provided such that the direction of the strong axis substantially aligns with the direction of gravity, and is supported by supporting material (27) so as to be freely expandable and contractible because of thermal expansion or thermal contraction in the longitudinal direction. The supporting material (27) is disposed more to the outside of the heating unit and a ceiling unit than the thermal insulation material.
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Inventors:
KUWAYAMA SHINJIRO (JP)
Application Number:
PCT/JP2015/065409
Publication Date:
December 10, 2015
Filing Date:
May 28, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN TEXENG CO LTD (JP)
SHOWA MFG (JP)
SHOWA MFG (JP)
International Classes:
C21D1/00; C21D1/34; C21D9/00; H05B3/62
Foreign References:
| JP2008296237A | 2008-12-11 | |||
| JP2002221394A | 2002-08-09 | |||
| JP3056522U | 1999-02-26 |
Other References:
See also references of EP 3153595A4
Attorney, Agent or Firm:
ICHIHARA MASAKI (JP)
Masaki Ichihara (JP)
Masaki Ichihara (JP)
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