Abstract: There is provided a honeycomb structure having a consecutive cell structure and capable of reconciling reduction in pressure loss and improvement in purification ability and a method for manufacturing the honeycomb structure. The honeycomb structure 1 has a plurality of partition walls 2 partitioning a plurality of cells 3 extending in an axial direction. At least a part of continuous partition walls 2 has a curved shape protruding toward outside from the center 4 of a cross-section perpendicular to the axial direction or a curved shape protruding toward the center of the cross-section from outside.

Abstract: There are disclosed a honeycomb structure which is preferably usable as a filter, for example, for trapping particulates in an exhaust gas of an internal combustion engine, boiler or the like or for filtering liquids such as city water and sewage and in which an increase of a pressure loss at a use time is inhibited. A honeycomb structure 1 comprises: two end surfaces 5 consisting of first and second end surfaces; a porous body 2 in which a plurality of fluid channels 3 extending to a second end surface 5b from a first end surface 5a are formed; and plugging members 4 for plugging end portions 6 on end surfaces 5 side of the fluid channels 3.

Abstract: The present invention provides a honeycomb structure in which a coating layer is firmly secured to an outer wall forming a cell structure so that separation of the coating layer is effectively prevented. A honeycomb structure according to the present invention includes a cell structure having a porous partition wall partitioning a plurality of cells serving as fluid channels and an outer wall integrally formed with the partition wall, and a coating layer disposed on the surface of the outer wall forming the cell structure, a depression/protrusion portion and/or a cut portion formed by partially removing the surface of the outer wall being formed on the surface of the outer wall, and the coating layer being disposed to cover the surface of the outer wall.

Abstract: A honeycomb structure includes partition walls arranged in an X-direction and intersecting partition walls so as to form a plurality of cells extending to an other-end portion from a one-end portion through an axial direction. There are disclosed a honeycomb structure in which intersecting portions of the partition walls include an intersecting portion (lacking portion) lacking in the one-end portion, a method of manufacturing the honeycomb structure, and a discharge fluid purification system comprising the honeycomb structure. The honeycomb structure is able to inhibit the opening from being blocked and is easily manufactured.

Abstract: There is disclosed a manufacturing method of a plugged honeycomb structure, capable of inexpensively manufacturing the plugged honeycomb structure which does not have any defect in a short time without any restriction on an operation environment and capable of reducing an amount of industrial wastes. A mask 30 for forming plugging portions is prepared based on image data of an end surface of a honeycomb structure 2 by an optical forming process, the mask having pores 33 capable of communicating with cells 19a to be plugged and convex portions 35 capable of fitting into cells 19b which are not to be plugged.

Abstract: This method is a manufacturing method of a plugged honeycomb structure including porous partition walls which form a plurality of cells divided as channels of a fluid in the form of a honeycomb and a plugging portion formed at one opening end portion of a predetermined cell of a cylindrical honeycomb structure. Openings of all cells of a honeycomb structure are filled with a slurry-like plugging material. Separately, an image of end-surface cells of the honeycomb structure is picked up with a camera. A photo-setting or thermosetting resin film is attached to an end surface of the honeycomb structure in which all of the cells are plugged. After a plugging pattern is printed on the film, the honeycomb structure to which a printed film is attached is irradiated with light or heat by use of a light or heat source. In consequence, only target film portions are allowed to set.

Abstract: There is disclosed a method for removing bubbles from a slurry and a device therefor capable of efficiently optimizing the removal of bubbles from a slurry and the viscosity of the slurry as well as dramatically reducing the bubble removing time.

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.

Abstract: Problem to be solved is to provide a means to make the thickness of a ceramic slurry in a container uniformly in a process to form plugged portions in a honeycomb structure. The solution is provided with a slurry applying device 1 comprising a plate shaped container 2 which a base 21 is flat, a fixed quantity non-pulsatile pump 3 to which a slurry 31 is discharged to the base 21 of the container 2, a discharge opening moving means which relatively moves a position of a discharge opening of the pump 3 between center 22 and periphery 23 of the base 21 of the container 2, and a container rotating means for application which rotates the container 2 as a rotating axis with the center 22 of the base 21.

Abstract: A method for manufacturing a plugged honeycomb structure has a process including the steps of: preparing an unplugged honeycomb structure, supplying ceramic slurry as a plugging material on an upper surface of a belt and leveling the ceramic slurry supplied on the upper surface of the belt by moving the belt to allow a blade having a straight-line side to pass in such a manner that the side of the leveling member is in parallel with the plane, and filling the plugging material into cells from openings on one side of the cells by pressing an end face on one side of the unplugged honeycomb structure against the leveled ceramic slurry. According to the present invention, there can easily be manufactured a plugged honeycomb structure having even depth of plugging members which plug open ends of cells.

Abstract: Using a slurry filler having a container having an opening top and storing plugging slurry and a cover attached to the opening top of the container and having a flat upper face and through-holes communicating the inside and the outside of the container and being disposed to correspond to cells to be plugged on an end face of the honeycomb structure, the honeycomb structure is set on the cover by positioning so that opening ends of cells to be plugged of the honeycomb structure match positions of through-holes of the cover, and the plugging slurry stored in the container is filled inside opening ends of cells to be plugged through the through-holes to form the plugged portions. According to this manufacturing method, a plugged honeycomb structure having no defects can be manufactured at low costs for a short time without restriction on operation circumstances with less industrial waste.

Abstract: There is provided 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. In this manufacturing method, 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. According to this manufacturing method, a plugged honeycomb structure having no defects can be manufactured at low costs for a short time without restriction on operation circumstances with less industrial waste.

Abstract: An assembling method for assembling an assembly by combining a plurality of mating members with each other, wherein inherent information regarding dimensions of individual members, which is necessary for the combination of members, has been marked on the member surface prior to the start of an assembling process, the information marked on the member is read in the assembling process, and members having a dimension that meets a proper combining condition are selected based on the information. An individual member and inherent information regarding the dimension of members can be handled integrally, when the mating members are combined with each other, members having a dimension that meets a proper combining condition are selected, and when the member is processed so as to correspond to the property thereof, proper processing corresponding to the inherent properties of each member can be performed easily and surely without troublesome work.

Abstract: There is provided a method for manufacturing a honeycomb structure, wherein a raw material containing Al2O3 is used as the ceramic raw material, and a low melting point reacting substance is allowed to be contained in the clay at least before being formed to obtain a honeycomb structure having a mean pore diameter of 20 to 500 ?m as the honeycomb structure. According to this method for manufacturing a honeycomb structure, it is possible to manufacture a honeycomb structure suitable for realizing a honeycomb catalyst body excellent in purification efficiency, having low pressure loss, and mountable even in a limited space.

Abstract: A honeycomb structural body having a plurality of cells and partition walls defining the cells, wherein a cross-section of each partition wall perpendicular to the flow direction of a fluid to be permeated has a grille shape of which gratings cross in x axis and Y axis directions, and there are at least two kinds of cells different in their cross-sectional areas perpendicular to the flow direction of a fluid to be filtered by virtue of changing intervals of the partition walls in the x axis direction and/or intervals of the partition walls in the y axis direction, as predetermined. Each cell is defined by two parallel partition walls having the same length and another two parallel partition walls having the same length crossing each other and being formed at the predetermined intervals. A die usable for forming such a honeycomb structure is also disclosed.

Abstract: A honeycomb structure has a plurality of cells which are partitioned by partition walls and function as fluid passages, and an end portion of predetermined cells is plugged by a plugging member. The plugging member has lower rigidity than that of the partition walls and has higher heat capacity than that of the partition walls. The honeycomb structure is excellent in durability because it hardly has a crack or a melting damage in a boundary portion between a partition wall and a plugged portion or an end portion.

Abstract: A honeycomb structure comprising porous partition walls disposed so as to form a plurality of cells extending in an axial direction. In the honeycomb structure, defining that a porosity and pore diameter of the partition walls in a central portion is (Pi) and (Di), a porosity and pore diameter of the partition walls in an outer peripheral portion is (Po) and (Do), (Pi) and (Po) have a relation of (Pi<Po); or (Pi) and (Po) have a relation of (Pi>Po) and (Di) and (Do) have a relation of (Di<Do).

Abstract: A method for manufacturing a honeycomb formed body, which comprises: a mixing step of mixing two or more types of aggregate particulate materials (first mixing) to prepare a forming blend (dry powder) and then mixing the blend with water (second mixing) to prepare a forming blend (wet powder); and a kneading step of kneading the forming blend (wet powder) to prepare a clay. This method for manufacturing a honeycomb formed body allows the prevention of the generation of internal defects without the adoption of a complicated process or a troublesome operation, with ease and simplicity.

Abstract: A method for manufacturing a plugged honeycomb structure includes the steps of: applying a predetermined amount of the plugging slurry on a face of an end face sealing member, 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 drying at least the plugging slurry at a portion in contact with the face of the end face sealing member in a state that the face of the end face sealing member is pressed against the one end face of the masked honeycomb structure. The method can manufacture simply at a low cost a plugged honeycomb structure with reduced accumulation of deposit on an end face when the honeycomb structure is used as a filter or the like.

Abstract: A method for manufacturing a formed honeycomb structure in an efficient manner which comprises the steps of: charging a material for forming a honeycomb structure 5 into a passage 22 for preform material for a honeycomb structure whose one end portion is provided with die 3 for forming a formed honeycomb structure; and extruding the charged preform material for a honeycomb structure 5 from the die 3 to form a formed honeycomb structure 10 while passing it through the passage, wherein a screen 4 for filtering foreign matters included in the preform material for a honeycomb structure 5 is disposed in the vicinity of the die 3, and wherein an operation for reduction of frictional resistances between an inner face of the passage 22 for preform material for a honeycomb structure and the preform material for a honeycomb structure 5 which passes the passage is employed.