A method of manufacturing a part, including providing a green body made of powder injection molding material and connected to a solid support member partially contained in the green body. The support member is engaged with a retaining fixture of a machine tool. While supporting the green body through the engagement between the support member and the retaining fixture, the green body is machined to obtain a machined green part. The machined green part is debound and sintered. A method of forming a powder injection molding part in a green state including machining a molded body using a machine tool while supporting the blank with a retaining fixture, and a machining blank having a green body and a solid support member including one locating feature of a pair of complementary locating features snuggly engageable with one another are also discussed.

A method of manufacturing a part, including providing a green body made of powder injection molding material and connected to a solid support member partially contained in the green body. The support member is engaged with a retaining fixture of a machine tool. While supporting the green body through the engagement between the support member and the retaining fixture, the green body is machined to obtain a machined green part. The machined green part is debound and sintered. A method of forming a powder injection molding part in a green state including machining a molded body using a machine tool while supporting the blank with a retaining fixture, and a machining blank having a green body and a solid support member including one locating feature of a pair of complementary locating features snuggly engageable with one another are also discussed.

A method of manufacturing a honeycomb structure includes providing a honeycomb body having a first contour extending between opposing first and second ends and chamfering a corner of the first end in a radial and axial direction toward the first contour to form a second contour. The method further includes removing material in an axial direction toward the second face to form a third contour, chamfering a corner of the third contour in a radial and axial direction toward the second end to form an end contour, and removing material in an axial direction toward the first face to form a fourth contour. Removing material to form the fourth contour substantially removes the second contour and the end contour.

A method of manufacturing a honeycomb structure includes providing a honeycomb body having a first contour extending between opposing first and second ends and chamfering a corner of the first end in a radial and axial direction toward the first contour to form a second contour. The method further includes removing material in an axial direction toward the second face to form a third contour, chamfering a corner of the third contour in a radial and axial direction toward the second end to form an end contour, and removing material in an axial direction toward the first face to form a fourth contour. Removing material to form the fourth contour substantially removes the second contour and the end contour.

A method including providing a ceramic log (300) with a first end and an opposing second end; providing one or more cutting devices (100) comprised of a dual bladed cutting member (200); and removing material by cutting at least the first end with the dual bladed cutting member (200), wherein a first blade (210) of the dual bladed cutting member (200) provides a finished surface and a second blade (220) removes a percentage of scrap above the finished surface. An apparatus (100) for cutting a ceramic log (300).

A method including providing a ceramic log (300) with a first end and an opposing second end; providing one or more cutting devices (100) comprised of a dual bladed cutting member (200); and removing material by cutting at least the first end with the dual bladed cutting member (200), wherein a first blade (210) of the dual bladed cutting member (200) provides a finished surface and a second blade (220) removes a percentage of scrap above the finished surface. An apparatus (100) for cutting a ceramic log (300).

A method for producing a ceramic honeycomb body having large numbers of longitudinal cells partitioned by cell walls, with its peripheral portion removed by machining, includes rotatably holding the ceramic honeycomb body on a main axis of a lathe, and rotating the ceramic honeycomb body around the main axis, to remove its peripheral portion by machining with a tool; the lathe comprising a first fixing jig on the main axis, and a second fixing jig substantially opposing the first fixing jig; each of the first and second fixing jigs having an abutting end portion opposing each other, the abutting end portion having a smaller outer shape than that of the end surface of the ceramic honeycomb body, and the abutting portion having a substantially flat abutting end surface perpendicular to the main axis.

A method for producing a ceramic honeycomb body having large numbers of longitudinal cells partitioned by cell walls, with its peripheral portion removed by machining, includes rotatably holding the ceramic honeycomb body on a main axis of a lathe, and rotating the ceramic honeycomb body around the main axis, to remove its peripheral portion by machining with a tool; the lathe comprising a first fixing jig on the main axis, and a second fixing jig substantially opposing the first fixing jig; each of the first and second fixing jigs having an abutting end portion opposing each other, the abutting end portion having a smaller outer shape than that of the end surface of the ceramic honeycomb body, and the abutting portion having a substantially flat abutting end surface perpendicular to the main axis.

A honeycomb structure includes porous partition walls defining cells which extend from a first end face to a second end face and which become through channels for a fluid, and a porous circumferential wall integrally formed with the partition walls to surround an outermost circumference of the partition walls, a thickness of the partition walls is from 101 to 381 m, porosities of the partition walls and the circumferential wall are both 48% or more, a porosity in a surface of the circumferential wall is higher than a porosity of an inner surface of the circumferential wall, and an average pore diameter in the surface of the circumferential wall is 10 m or more.

A honeycomb structure includes porous partition walls defining cells which extend from a first end face to a second end face and which become through channels for a fluid, and a porous circumferential wall integrally formed with the partition walls to surround an outermost circumference of the partition walls, a thickness of the partition walls is from 101 to 381 m, porosities of the partition walls and the circumferential wall are both 48% or more, a porosity in a surface of the circumferential wall is higher than a porosity of an inner surface of the circumferential wall, and an average pore diameter in the surface of the circumferential wall is 10 m or more.