Title:
HEATING FURNACE
Document Type and Number:
Japanese Patent JP3287029
Kind Code:
B2
Abstract:
PURPOSE: To provide a heating furnace with a resistance heating element, the life of which can be substantially prolonged by completely suppressing evaporation of graphite from a surface of the heating element.
CONSTITUTION: A carbon fiber thread layer 3 comprising a laminate formed by winding of carbon fiber threads, and a sheet-shaped graphite layer 4 comprising a laminate formed by winding of a sheet-shaped graphite cover in this order an outer surface of a cylindrical-shaped resistance heating element 2 which is formed of graphite and has an inlet 9a and an outlet 9b for a thread Y. The insulating members 5 which comprise a compact of boron nitride is provided between the sheet-shaped graphite layer 4 and the resistance heating element 2 on the opposite ends thereof. Accordingly, the insulating members 5 prevent carbon vapor having evaporated from an outer surface of the resistance heating element 2 from leaking outside the element, so that a heating furnace is provided to have a heating element 1, the life of which is substantially prolonged.
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Inventors:
Toshihide Sekido
Seiji Tanaka
Akira Okuda
Tomihiro Ishida
Seiji Tanaka
Akira Okuda
Tomihiro Ishida
Application Number:
JP27742792A
Publication Date:
May 27, 2002
Filing Date:
October 15, 1992
Export Citation:
Assignee:
Toray Industries, Inc.
International Classes:
F27D11/02; F27B9/06; H05B3/42; H05B3/62; (IPC1-7): F27B9/06; F27D11/02; H05B3/42; H05B3/62
Domestic Patent References:
| JP4163321A | ||||
| JP58138981A | ||||
| JP5925936B2 |
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