Process and apparatus for producing a filter in the form of a mo

Details Process and apparatus for producing a filter in the form of a mo Process and apparatus for producing a filter in the form of a mo

1993-04-08

1994-11-15

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 40, 156 64, 156 89, C04B 4187

Patent

active

053645731

ABSTRACT:
A process and apparatus are described for the production of a filter in the form of a ceramic honeycomb body monolith, starting with a blank of the honeycomb body monolith with the bilaterally open ducts. An image-recording and processing system scans the end faces of the monolith and determines the deviations of the actual geometry of the ducts to be alternatingly sealed from the geometry of an idealized honeycomb body. The image-processing system determines zones on the respective end face of the monolith which correspond, within predeterminable tolerances, to the geometry of the idealized honeycomb body, wherein zones are determined having a maximally high number of ducts. In correspondence with the determination of the aforementioned zones, a processing route is established which predetermines which one of several metering heads with a varying number of nozzles will be activated. The nozzles then inject a plugging compound into the thus-determined ducts. After sealing of the determined ducts on one end face, the monolith is turned by 180.degree. in a clamping and turning device whereupon the ducts on the second end face are sealed in a corresponding fashion, but in a pattern complementary to that on the first end face. The thus-prepared monolith is thereafter subjected to a ceramic-production process.

REFERENCES:
patent: 4293357 (1981-10-01), Higuchi et al.
patent: 4329162 (1982-05-01), Pitcher, Jr.
patent: 4557773 (1985-12-01), Bonzo
patent: 4563414 (1986-01-01), Ogawa et al.

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