METHOD FOR COMPUTOR-CONTROLLED ALTERNATE SEALING FROM FRONT FACE OF DUCT OF INTEGRAL HONEYCOMB BODY FOR DEVICE OF CLEANING EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE

摘要

PURPOSE: To obtain a method for alternate frontal sealing of ducts by memorizing the first end faces of a monolith, sealing the ducts at both end faces and curing the first sealing composition, then sealing the still vacant duct openings with a second composition and thereafter, removing the first sealing composition by receiving heating and ceramic forming stages. CONSTITUTION: The first end faces of the honeycomb monolith 1 are first scanned and are memorized. A computer searches the images of the coherent zones 2, 3, 4 and 5 of the ducts 6 in the idealized monolith 1 and all the ducts 6 are sealed by the first sealing composition. The monolith 1 is thereafter rotated at an angle of 180 deg. and the ducts 6 at the other end faces are sealed in the patterns complementary with the patterns of the first end faces. All of the still vacant duct openings 6 at both end faces are sealed by the second composition for ceramic formation and/or sintering after curing of the first sealing composition and thereafter, the first sealing composition is removed by receiving the heating and ceramic forming stages.