Honeycomb structure body having hexagonal cells and manufacturing method thereof

A honeycomb structure body comprising:

• a plurality of hexagonal cells formed in a lattice arrangement, each hexagonal cell having a hexagonal cross-sectional shape surrounded by a hexagonal cell wall of a hexagonal cross-sectional shape composed of six sides,
• wherein each side of the hexagonal cell wall has a single concave shape so as to be concave only toward an inside or only toward an outside of the hexagonal cell in a cross-sectional plane of the honeycomb structure body, transverse to an axis direction of the honeycomb structure body,
• wherein adjacent sides in the six sides of the hexagonal cell wall are concave only toward the inside and only toward the outside of the hexagonal cell, respectively, whereby the sides of the hexagonal cell wall respectively alternate, about a circumference of the hexagonal cell, between being concave only toward the inside and being concave only toward the outside.

A honeycomb structure body comprising:

• a plurality of hexagonal cells formed in a lattice arrangement, each hexagonal cell having a hexagonal cross-sectional shape surrounded by a hexagonal cell wall of a hexagonal cross-sectional shape composed of six sides,
• wherein each side of the hexagonal cell wall has a concave shape toward one of an inside and an outside of the hexagonal cell in a cross-sectional plane of the honeycomb structure body, transverse to an axis direction of the honeycomb structure body, three consecutive sides of each hexagonal cell wall having a concave shape that is concave toward the inside of the hexagonal cell, and the remaining three consecutive sides of each hexagonal cell having a concave shape that is concave toward the outside of the hexagonal cell, and
• wherein a thickness of each side of the hexagonal cell wall is 90 μm, a cell pitch of the hexagonal cells is 111 μm, a longitudinal length of the honeycomb structure body is 100.0 mm, an outer diameter of the honeycomb structure body is 103.0 mm.