Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1989-05-16
1990-07-10
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432241, F27B 926
Patent
active
049404083
ABSTRACT:
A tunnel kiln for firing molded ceramic green products includes a gate for feeding a kiln car into and out of the kiln. The gate located at low temperature parts of the kiln includes side walls made of a stainless steel having inclined surfaces and a ceiling made of a stainless steel and having inclined surfaces toward the side walls. The tunnel kiln further includes sand seals at connections between the side walls and the ceiling and receiving bases provided under lower ends of the side walls for receiving pyrolytically decomposed products. The side walls are formed with exhaust ports communicating with the receiving bases so that the pyrolytically decomposed products flow along the inclined surfaces of the ceiling and the side walls are once collected in the receiving bases and exhausted through the exhaust ports of the side walls to the outside of the kiln. With this arrangement, defective ceramic products due to decomposed products attached thereto are completely eliminated.
REFERENCES:
patent: 2003450 (1938-06-01), Ladd
patent: 2502828 (1950-04-01), Cooper et al.
patent: 4348175 (1982-09-01), Molina
patent: 4504221 (1985-03-01), Hartmann
patent: 4578031 (1986-03-01), Johnson et al.
Miyahara Kazuhiro
Ogura Koji
NGK Insulators Ltd.
Yuen Henry C.
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