Method for producing honeycomb structures

Patent metadata

Field	Value
Publication number	US-2016185010-A1
Application number	US-201414392179-A
Country	US
Kind code	A1
Filing date	May 30, 2014
Priority date	Jun 28, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

A plurality of inlet-side octagonal cells and outlet-side quadrangular cells partitioned by partition walls on an upper surface and a lower surface are opened in a green honeycomb molded body in which a plurality of through-holes partitioned from each other by the partition walls are open in an end surface of a columnar body. Four outlet-side quadrangular cells having a smaller opening area adjoin around one inlet-side octagonal cell through the partition walls. The partition walls are joined together and the inlet-side octagonal cells are opened while closing the outlet-side quadrangular cells on the inlet side and the outlet-side quadrangular cells are opened while closing the inlet-side octagonal cells on the outlet side in a particulate-matter-removing filter such as a diesel particulate filter.

First claim

1 . A method for producing a honeycomb structure comprising a plurality of through-holes that open in an end surface of a columnar body and are mutually partitioned by partition walls, a part of the plurality of through-holes having been closed, the method comprising:
a closing step of closing a part of the through-holes by joining the partition walls in a green honeycomb molded body together at the end surface, wherein the green honeycomb molded body in which a part of the through-holes are closed at the closing step includes, at the end surface, one first through-hole and four second through-holes that have a smaller opening area than the first through hole and adjoin around the one first through-hole with the partition walls provided therebetween.

2 . The method for producing a honeycomb structure according to claim 1 , wherein the first through-hole is octagonal and the second through-hole is quadrangular.

3 . The method for producing a honeycomb structure according to claim 1 , wherein the first through-hole has a round quadrangular shape with a corner of the quadrangle being rounded, and the second through-hole has a quadrangular shape.

4 . The method for producing a honeycomb structure according to claim 1 , wherein, at the closing step, the second through-hole is closed at one of the end surfaces, and the first through-hole is closed at another end surface.

5 . The method for producing a honeycomb structure according to claim 1 , wherein, at the closing step, a closing tool is inserted into a part of the plurality of through-holes in the green honeycomb molded body to join the partition walls together at the end surface to close the through-holes.

6 . The method for producing a honeycomb structure according to claim 5 , wherein, at the closing step, in closing the second through-holes, the closing tool including any one shape of a quadrangular pyramid and a quadrangular pyramid platform is inserted into the first through-hole while allowing a lateral edge of the closing tool to abut against each of the partition walls that adjoin the second through-holes to close the second through-holes.

7 . The method for producing a honeycomb structure according to claim 5 , wherein, at the closing step, in closing the first through-hole, the closing tool including any one shape of a quadrangular pyramid and a quadrangular pyramid platform is inserted into each of the second through-holes while allowing a lateral edge of the closing tool to abut against the partition walls that adjoin the first through-hole to close the first through-hole.

8 . A honeycomb structure produced by the method according to claim 1 .

Assignees

• Sumitomo Chemical Co

Inventors

• Ikawa Hiroyuki
• Inoue Masashi
• Komori Teruo

Classifications

• B28B1/093 Primary

  by means directly acting on the material, e.g. by cores wholly or partly immersed in the material {or elements acting on the upper surface of the material}({B28B1/084 takes precedence; } internal vibrators for compacting concrete in situ E04G21/08) · CPC title

• B01D46/2459

  of the plugs · CPC title

• B28B11/006

  Making hollow articles or partly closed articles · CPC title

• B01D46/0001 Primary

  Making filtering elements · CPC title

• B01D2046/2481

  Operations & Transport · mapped topic