Method of manufacturing plugged honeycomb structure and plugged honeycomb structure

A method for manufacturing a plugged honeycomb structure having a honeycomb structure where a plurality of cells extending between two opening ends are defined by porous partition walls and plugged portions disposed so as to plug one of the two opening ends of each of the cells,

• wherein, after a plugging mixed material is filled into opening end portions of all the cells of the honeycomb structure, the plugging mixed material filled into the opening end portions of cells which should not be plugged is removed and penetrated to open the end portions of the cells which should not be plugged.

A method for manufacturing a plugged honeycomb structure having a honeycomb structure where a plurality of cells extending between two opening ends are defined by porous partition walls and plugged portions disposed so as to plug one of the two opening ends of each of the cells,

• wherein, after a plugging mixed material is filled into opening end portions of all the cells of the honeycomb structures, a hole-making jig having a flat upper surface and pins disposed so as to correspond to positions of the cells which should not be plugged on an end face of the honeycomb structure is positioned so that the end portions of the cells which should not be plugged of the honeycomb structure match the positions of the pins of the hole-making jig, and the end face is pressed against the upper surface of the hole-making jig to remove and penetrate the plugging mixed material filled into the opening end portions of the cells which should not be plugged with the pins.

A method for manufacturing a plugged honeycomb structure having a honeycomb structure where a plurality of cells extending between two opening ends are defined by porous partition walls and plugged portions disposed so as to plug one of the two opening ends of each of the cells,

• wherein, after a plugging mixed material is filled into opening end portions of all the cells on one end face of the honeycomb structure, the plugging mixed material filled into the opening end portions of cells which should not be plugged is removed and penetrated by sweeping away with pressurized fluid to open the end portions of the cells which should not be plugged, and then the plugging mixed material is filled into the opening end portions of the cells on the other end face of the honeycomb structure which should be plugged by vacuum suction.

A plugged honeycomb structure having a honeycomb structure where a plurality of cells extending between two opening ends are defined by porous partition walls and plugged portions disposed so as to plug one of the two opening ends of each of the cells, wherein the same material as a material for the plugged portions adheres to an inner peripheral face of an opening end on an unplugged side of each of the cells.

A plugged honeycomb structure, which is manufactured by a method for manufacturing a plugged honeycomb structure having a honeycomb structure where a plurality of cells extending between two opening ends are defined by porous partition walls and plugged portions disposed so as to plug one of the two opening ends of each of the cells, wherein, after a plugging mixed material is filled into opening end portions of all the cells of the honeycomb structures, a hole-making jig having a flat upper surface and pins disposed so as to correspond to positions of the cells which should not be plugged on an end face of the honeycomb structure is positioned so that the end portions of the cells which should not be plugged of the honeycomb structure match the positions of the pins of the hole-making jig, and the end face is pressed against the upper surface of the hole-making jig to remove and penetrate the plugging mixed material filled into the opening end portions of the cells which should not be plugged with the pins, and

• a protrusion or a groove functioning as a standard for positioning is formed in an outer periphery thereof.