Honeycomb structure and method for producing same
AssigneeNGK Insulators, Ltd.
InventorYuto Naito
Life of this patent
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Abstract
A honeycomb structure comprising an outer peripheral wall; a partition wall defining a plurality of cells each extending from one end face to other end face, a plurality of slits extending radially inward from an outer peripheral surface of the honeycomb structure and extending in an extending direction of the cells; and a filling material filled in the slits. A difference between a width Y of the filling material when viewed from the outside in the radial direction of the honeycomb structure, and a width X of each of the slits on the outer peripheral surface of the honeycomb structure, represented by (Y−X), is determined for each of the slits, and a difference between a maximum value A of the difference and a minimum value B of the difference, represented by the (A−B), is 0.4 mm or less.
Claims6
A honeycomb structure comprising a honeycomb structure portion comprising:
- an outer peripheral wall;
- a partition wall arranged on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells each extending from one end face to other end face to form a flow path,
- wherein the honeycomb structure further comprises:
- a plurality of slits extending radially inward from an outer peripheral surface of the honeycomb structure and extending in an extending direction of the cells;
- and
- a filling material filled in the slits, and
- wherein, when a difference between a width Y of the filling material and a width X of each of the slits, represented by the following equation (1), is determined for each of the slits, a difference between a maximum value A of the difference and a minimum value B of the difference, represented by the following equation (2), is 0.4 mm or less:
- (Y−X) (1)
- (A−B) (2),
- in which equation (1), X represents the width of each of the slits on the outer peripheral surface of the honeycomb structure, and Y represents the width of the filling material when the filling material is viewed from the outside in the radial direction of the honeycomb structure.
A method for producing a honeycomb structure, comprising:
- a masking step of applying a mask to an outer peripheral surface of a honeycomb structure base body, the honeycomb structure base body comprising a honeycomb structure portion comprising:
- an outer peripheral wall;
- a partition wall arranged on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells each extending from one end face to other end face to form a flow path;
- after the masking step, a slit forming step of processing the honeycomb structure base body from the outside in a radial direction to form a plurality of slits extending radially inward from the outer peripheral surface of the honeycomb structure base body and extending in an extending direction of the cells;
- after the slit forming step, a filling step of filling the slits with a filling material;
- and
- after filling the slits with the filling material, a removing step of removing the mask.
Dependencies are inferred from the claim text.