| US 7,537,634 B2 | ||
| Method for manufacturing plugged honeycomb structure | ||
| Tatsuhiko Hatano, Kasugai (Japan); Masahiro Masuda, Inuyama (Japan); and Yukihito Ichikawa, Nagoya (Japan) | ||
| Assigned to NGK Insulators, Ltd., Nagoya (Japan) | ||
| Filed on Mar. 15, 2006, as Appl. No. 11/374,991. | ||
| Claims priority of application No. 2005-084920 (JP), filed on Mar. 23, 2005; and application No. 2006-007669 (JP), filed on Jan. 16, 2006. | ||
| Prior Publication US 2006/0213164 A1, Sep. 28, 2006 | ||
| Int. Cl. B01D 46/00 (2006.01); F01N 3/022 (2006.01) | ||
| U.S. Cl. 55—523 [55/282.3; 55/385.3; 55/DIG. 5; 55/DIG. 10; 55/DIG. 30; 60/311; 95/273; 264/44; 264/628; 264/630; 264/631; 264/DIG. 48; 428/116] | 16 Claims |
| 1. A method for manufacturing a plugged honeycomb structure comprising the steps of:
subjecting a ceramic forming raw material to extrusion forming to obtain a cylindrical unfired honeycomb structure having
porous partition walls separating and forming a plurality of cells functioning as fluid passages,
filling plugging slurry containing ceramic in one opening of each of predetermined cells of the unfired honeycomb structure
or a fired honeycomb structure obtained by firing the unfired honeycomb structure and in the other opening of each of the
remaining cells to obtain a plugged honeycomb structure precursor, and
firing the plugged honeycomb structure precursor to obtain a plugged honeycomb structure;
wherein a mask covering the opening of each of cells other than the predetermined cells is disposed on one end face of the
unfired honeycomb structure or the fired honeycomb structure at least when the plugging slurry is filled in one opening of
each of the predetermined cells of the unfired honeycomb structure or the fired honeycomb structure to obtain a masked honeycomb
structure,
a predetermined amount of the plugging slurry is applied on a face of an end face sealing member having a predetermined face
size and limiting motion of the plugging slurry inside the predetermined cells by bringing the face into contact with the
one end face of the masked honeycomb structure when the plugging slurry is filled in the opening of each of the predetermined
cells, and
the one end face of the masked honeycomb structure is pressed against the face to which the plugging slurry was applied of
the end face sealing member to fill the plugging slurry in the predetermined cells on the one end face side, and at least
the plugging slurry at a portion in contact with the face of the end face sealing member is dried in a state that the face
of the end face sealing member is pressed against the one end face of the masked honeycomb structure to obtain the plugged
honeycomb structure precursor.
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