Production method of ceramic honeycomb filter
AssigneeHitachi Metals, Ltd.
InventorsToyohide Kumagae, Shinya Tokumaru, Hirohisa Suwabe
Life of this patent
Estimating the term…
Abstract
A method for producing a ceramic honeycomb filter having predetermined plugs comprising immersing the end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that the plugging material slurry is introduced into the end portions of the predetermined flow paths, and removing plugging material protrusions formed in the flow paths that should not be plugged.
Claims5
A method for producing a ceramic honeycomb filter having predetermined plugs, said method comprising:
- immersing end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that said plugging material slurry is introduced into the end portions of the predetermined flow paths, and
- removing plugging material protrusions formed in the flow paths that should not be plugged, wherein a protrusions-removing means is moved in a flow path in which said plugging material protrusions are formed, to remove said plugging material protrusions.
A method for producing a ceramic honeycomb filter having predetermined plugs, said method comprising:
- immersing end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that said plugging material slurry is introduced into the end portions of the predetermined flow paths,
- leaving other flow paths free of plugging material slurry except for plugging material slurry which has inadvertently entered said other flow paths to form plugging material protrusions,
- removing the ceramic honeycomb structure from the plugging material slurry, and
- removing the plugging material protrusions formed in the other flow paths that should not be plugged, by moving protrusions-removing means in one or more flow paths in which said plugging material protrusions are formed, to remove said plugging material protrusions.
Dependencies are inferred from the claim text.