Manufacturing method of honeycomb structure and honeycomb formed body

Patent metadata

Field	Value
Publication number	US-2016243724-A1
Application number	US-201615013159-A
Country	US
Kind code	A1
Filing date	Feb 2, 2016
Priority date	Feb 24, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A manufacturing method of a honeycomb structure includes a forming step of forming a honeycomb formed body having partition walls defining a plurality of cells, a convex wall portion forming step of forming a convex wall portion in the obtained honeycomb formed body, a mounting step of directing downward one end face on which the convex wall portion is formed and mounting the honeycomb formed body on a shelf plate, a firing step of firing the honeycomb formed body mounted on the shelf plate, to form a honeycomb fired body, and a circumference grinding step of grinding a circumferential surface of the honeycomb fired body, to remove the convex wall portion.

First claim

What is claimed is:

1 . A manufacturing method of a honeycomb structure comprising:
a forming step of forming a forming raw material, and extruding, cutting and drying the material to form a honeycomb formed body having partition walls defining a plurality of cells which extend from one end face to the other end face and which become through channels for a fluid; a convex wall portion forming step of forming a convex wall portion projected from the vicinity of a circumferential edge of the one end face of the honeycomb formed body obtained by the forming step along a central axis direction of the honeycomb formed body, and processing the one end face so that its cross section has a concave shape; a mounting step of directing downward the side of the one end face on which the convex wall portion is formed, and mounting the honeycomb formed body on a shelf plate so that the convex wall portion abuts on a shelf plate surface; a firing step of firing the honeycomb formed body mounted on the shelf plate, to form a honeycomb fired body; and a circumference grinding step of grinding a circumferential surface of the honeycomb fired body obtained by the firing step, to remove the convex wall portion.

2 . The manufacturing method of the honeycomb structure according to claim 1 , further comprising:
a circumferential wall forming step of applying a circumference coating material to a circumference ground surface of the honeycomb fired body from which the convex wall portion is removed by the circumference grinding step, to form a circumferential wall.

3 . The manufacturing method of the honeycomb structure according to claim 1 , further comprising:
a communication hole forming step of forming a communication hole portion which communicates between a wall inner surface and a wall outer surface of the convex wall portion.

4 . The manufacturing method of the honeycomb structure according to claim 1 ,
wherein a wall height of the convex wall portion from the one end face is from 0.7 to 3 mm.

5 . The manufacturing method of the honeycomb structure according to claim 1 ,
wherein a wall width of the convex wall portion is from 3 to 15 mm.

6 . A honeycomb formed body for use in the manufacturing method of the honeycomb structure according to claim 1 , comprising:
a convex wall portion projected from the vicinity of a circumferential edge of one end face along a central axis direction, wherein the one end face is processed so that its cross section has a concave shape.

7 . The honeycomb formed body according to claim 6 ,
wherein the convex wall portion further comprises a communication hole portion which communicates between a wall inner surface and a wall outer surface.

Assignees

• Ngk Insulators Ltd

Inventors

• Kitaguchi Daniel Yukichi

Classifications

• B28B11/12 Primary

  for removing parts of the articles by cutting · CPC title

• B01J35/57

  Honeycombs · CPC title

• B28B3/20 Primary

  wherein the material is extruded {(extrusion moulding of plastics B29C48/00)} · CPC title

• B28B11/08

  for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads · CPC title

• B01J35/04

  Operations & Transport · mapped topic