Blank ceramic honeycomb body - has spikes to distort webs to seal separate channels before the body is fired

摘要

To close separate channels in a blank ceramic honeycomb body, as a carrier for catalysts to clean exhaust gases from internal combustion engines, a distortion spike (21) is inserted into the channel (12) to be closed to distort the webs (11) flanking the channel. The webs are pressed tightly together at the ends of the honeycomb body (1) to give a plug (13) with a tight seal. ADVANTAGE - The method gives a closure to the channels while the body is still in the clay form, before firing, without damaging the wall structure of the body.