Method for manufacturing cell structure

Abstract
There is provided a method for manufacturing cell structures having a plurality of cells divided by porous partition walls and extending from one end face to the other end face to function as fluid passages. Dry mass of each of a plurality of honeycomb-shaped cell structure precursors is measured, and at least one end face of each of the cell structure precursors is subjected to machining according to the dry mass measured to obtain a plurality of cell structures having a uniform dry mass. The method can suppress excessive use of a catalyst component to reduce production costs and uniformalize the amount of a catalyst component carried on the structures.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a perspective view schematically showing an example of a cell structure (cell structure precursor).



FIG. 2 is a flow chart showing an embodiment of a method for manufacturing a cell structure of the present invention.



FIG. 3 is a flow chart showing an embodiment of a method for manufacturing another cell structure.



FIG. 4 is a graph where mass (g) of a cell structure manufactured in Example 1 before machining an end face is plotted with respect to the whole length (mm) before machining an end face.



FIG. 5 is a graph where mass (g) of a cell structure manufactured in Example 1 after machining an end face is plotted with respect to the whole length (mm) after machining an end face.



FIG. 6 is a graph where mass (g) of a cell structure manufactured in Example 2 before machining an end face is plotted with respect to the whole length (mm) before machining an end face.



FIG. 7 is a graph where mass (g) of a cell structure manufactured in Example 2 after machining an end face is plotted with respect to the whole length (mm) after machining an end face.



FIG. 8 is a graph where mass (g) of a cell structure manufactured in Example 3 is plotted with respect to the whole length (mm) after secondary firing.



FIG. 9 is a graph where water-absorption amount and water-absorption ratio of a plurality of cell structures are plotted with respect to the whole length.


Claims
  • 1. A method for manufacturing cell structures having a plurality of cells divided by porous partition walls and extending from one end face to the other end face to function as fluid passages, wherein dry mass of each of a plurality of honeycomb-shaped cell structure precursors is measured, andat least one end face of each of the cell structure precursors is subjected to machining according to the dry mass measured to obtain a plurality of cell structures having a uniform dry mass.
  • 2. A method for manufacturing cell structures according to claim 1, wherein the machining is cutting, grinding, electro-discharge machining, ultrasonic machining, or beam machining.
  • 3. A method for manufacturing cell structures according to claim 1, wherein the cell structure is used as a catalyst carrier.
  • 4. A method for manufacturing cell structures according to claim 1, wherein, after the machining, one end portion of each of predetermined cells of the cells is plugged with a plugging material on at least one end face of each of a plurality of the cell structure precursors to obtain the cell structures having a uniform dry mass.
  • 5. A method for manufacturing cell structures according to claim 1, wherein, after one end portion of each of predetermined cells of the cells is plugged with a plugging material on at least one end face of each of the cell structure precursors, dry mass of each of the cell structure precursors is measured.
Priority Claims (2)
Number Date Country Kind
2006-074894 Mar 2006 JP national
2007-031736 Feb 2007 JP national