Ceramic honeycomb filter and its production method
AssigneeHitachi Metals, Ltd.
InventorsKazutoyo Watanabe, Hirohisa Suwabe
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Abstract
A ceramic honeycomb filter comprising pluralities of ceramic honeycomb structures each having large numbers of flow paths partitioned by cell walls, which are bonded in the direction of the flow paths, predetermined flow paths being sealed by plugs, plugs formed at one end of at least one honeycomb structure being bonded to at least part of plugs formed at one end of a honeycomb structure adjacent to the end of this honeycomb structure.
Claims8
A ceramic honeycomb filter having porous cell walls comprising a first and a second ceramic honeycomb structure, each having large numbers of flow paths partitioned by cell walls, which are bonded in the direction of said flow paths, predetermined flow paths being sealed by plugs, plugs formed at the downstream end of said first ceramic honeycomb structure positioned on an upstream side of an exhaust gas path being bonded to at least part of plugs formed at the upstream end of said second honeycomb structure adjacent to said end of said first honeycomb structure, and a cell wall thickness and a cell wall pitch of said first honeycomb structure being same with those of said second honeycomb structure, respectively.
A method for producing a ceramic honeycomb filter with predetermined flow paths sealed by plugs, wherein in the bonding of a first and second ceramic honeycomb structure each having large numbers of flow paths partitioned by cell walls in the direction of said flow paths, plugs formed at a downstream end of said first ceramic honeycomb structure positioned on an upstream side of an exhaust gas path are bonded to at least part of plugs formed at an upstream end of said second honeycomb structure adjacent to said first honeycomb structure.
Dependencies are inferred from the claim text.