Ceramic tubes and their manufacture

Ceramic tubes (10) are manufactured from a mixture that includes ceramic powder. The mixture is extruded through a die (48) to form a tube (10). The tube (10) is passed through an open-ended dryer (16), calciner (20), transition zone (22), sintering furnace (24), and cooler (26). Thereafter, the tub...

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Bibliographic Details
Main Authors RUPPEL, IRVING B., JR, EUCKER, JAMES L, RUHL, ROBERT C
Format Patent
LanguageEnglish
French
German
Published 12.09.1990
Subjects
BLASTING
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE
FURNACES
HEATING
KILNS
LIGHTING
MECHANICAL ENGINEERING
OVENS
PERFORMING OPERATIONS
RETORTS
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
TRANSPORTING
WEAPONS
WORKING CEMENT, CLAY, OR STONE
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Summary:Ceramic tubes (10) are manufactured from a mixture that includes ceramic powder. The mixture is extruded through a die (48) to form a tube (10). The tube (10) is passed through an open-ended dryer (16), calciner (20), transition zone (22), sintering furnace (24), and cooler (26). Thereafter, the tube (10) is cut to the desired length (which may be very long). The quality of the tube (10) is enhanced by applying a vacuum to the mixture prior to extrusion. For tubes (10) made of non-oxide ceramics, an inert atmosphere is maintained both inside and outside the tube in all sections of the equipment that operate above 200 DEG C. A controlled tension is applied to the tube (10) by means of first pinch rolls (18) disposed downstream of the dryer (16) and second pinch rolls (30) disposed downstream of the cooler (26).
Bibliography:Application Number: EP19900302216