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AssigneeNGK Insulators, Ltd.
InventorYukihito Ichikawa
Estimating the term…
A honeycomb structural body having a plurality of cells and partition walls defining the cells, wherein a cross-section of each partition wall perpendicular to the flow direction of a fluid to be permeated has a grille shape of which gratings cross in x axis and Y axis directions, and there are at least two kinds of cells different in their cross-sectional areas perpendicular to the flow direction of a fluid to be filtered by virtue of changing intervals of the partition walls in the x axis direction and/or intervals of the partition walls in the y axis direction, as predetermined. Each cell is defined by two parallel partition walls having the same length and another two parallel partition walls having the same length crossing each other and being formed at the predetermined intervals. A die usable for forming such a honeycomb structure is also disclosed.
A honeycomb structural body having a plurality of cells to function as a passage for a fluid divided by porous partition walls, specified cells being plugged at one of open end faces and the remaining cells being plugged at other end face alternately, a fluid flowing into the open end face side of one set of cells being caused to pass through the cells and permeate through the partition walls, thus permeated fluid being discharged from the open end face side of the other cells, wherein a cross-section pattern of the partition walls perpendicular to flow direction of the fluid has a grille shape of which gratings cross in x axis and Y axis directions, and there are at least two kinds of cells different each other in their cross-sectional areas perpendicular to the flow direction of a fluid to be filtered by virtue of changing intervals of the partition walls in the x axis direction and/or intervals of the partition walls in the y axis direction.
A filter structure comprising a honeycomb structural body having a plurality of cells to function as a passage for a fluid divided by porous partition walls, specified cells being plugged at one of open end faces and the remaining cells being plugged at other end face alternately, a fluid flowing into the open end face side of one set of cells being caused to pass through the cells and permeate through the partition walls, thus permeated fluid being discharged from the open end face side of the other cells, wherein a cross-section pattern of the partition walls perpendicular to flow direction of the fluid has a grille shape of which gratings cross in x axis and Y axis directions, and there are at least two kinds of cells different each other in their cross-sectional areas perpendicular to the flow direction of a fluid to be filtered by virtue of changing intervals of the partition walls in the x axis direction and/or intervals of the partition walls in the y axis direction;
A die for forming the honeycomb structural body by extrusion comprising a die base having at least two surfaces, which is provided with a raw material introducing part for introducing a raw material from a first opening on one side and an extrusion part communicating with the raw material introducing part to extrude the raw material supplied by the raw material introducing part from a second opening on the other side, thereby forming a honeycomb structural body, wherein the cross-section of the extrusion part composed of the second opening on the plane perpendicular to the direction in which the raw material is extruded has a pattern of a grille as a whole, with crossing slits opening both in the x axis direction and in the y axis direction, wherein either the intervals between the two adjacent slits opening in the x axis direction or the intervals between the two adjacent slits opening in the y axis direction are not equal, with the slits being arranged at unequal intervals either in the x axis direction or the y axis direction.
Dependencies are inferred from the claim text.