Abstract: A manufacturing method of a honeycomb structure includes a forming step of forming a quadrangular pillar-shaped honeycomb formed body, a firing step of firing the honeycomb formed body and forming a quadrangular pillar-shaped honeycomb fired body, a coating step of coating at least a part of side surfaces of the honeycomb fired body with a paste-like bonding material, a honeycomb block body preparing step of bonding the plurality of honeycomb fired bodies while performing pressurizing, to prepare a honeycomb block body, and a circumference grinding step of grinding a circumferential surface of the honeycomb block body and obtaining the honeycomb structure, and in the honeycomb block body preparing step, the bonding is performed without interposing any member other than the bonding material between the honeycomb fired bodies, and the bonding material has a shear thinning property.

Abstract: A manufacturing method of a honeycomb structure includes a forming step of forming a quadrangular pillar-shaped honeycomb formed body, a firing step of firing the honeycomb formed body and forming a quadrangular pillar-shaped honeycomb fired body, a coating step of coating at least a part of side surfaces of the honeycomb fired body with a paste-like bonding material, a honeycomb block body preparing step of bonding the plurality of honeycomb fired bodies while performing pressurizing, to prepare a honeycomb block body, and a circumference grinding step of grinding a circumferential surface of the honeycomb block body and obtaining the honeycomb structure, and in the honeycomb block body preparing step, the bonding is performed without interposing any member other than the bonding material between the honeycomb fired bodies, and the bonding material has a shear thinning property.

Abstract: The manufacturing method of the honeycomb structure has a forming step of forming a forming raw material into a plurality of quadrangular prismatic honeycomb formed bodies each having partition walls, a firing step of firing the plurality of honeycomb formed bodies to form a plurality of quadrangular prismatic honeycomb fired bodies, a sheet-like bonding material attaching step of attaching sheet-like bonding materials to at least part of side surfaces of at least part of the plurality of honeycomb fired bodies, a honeycomb block body preparing step of preparing a honeycomb block body in which the plurality of honeycomb fired bodies are stacked, by assembling the plurality of quadrangular prismatic honeycomb fired bodies while bonding the side surfaces thereof to one another by the bonding materials, and a grinding step of grinding a circumferential portion of the honeycomb block body to obtain the honeycomb structure.

Abstract: The manufacturing method of the honeycomb structure has a forming step of forming a forming raw material into a plurality of quadrangular prismatic honeycomb formed bodies each having partition walls, a firing step of firing the plurality of honeycomb formed bodies to form a plurality of quadrangular prismatic honeycomb fired bodies, a sheet-like bonding material attaching step of attaching sheet-like bonding materials to at least part of side surfaces of at least part of the plurality of honeycomb fired bodies, a honeycomb block body preparing step of preparing a honeycomb block body in which the plurality of honeycomb fired bodies are stacked, by assembling the plurality of quadrangular prismatic honeycomb fired bodies while bonding the side surfaces thereof to one another by the bonding materials, and a grinding step of grinding a circumferential portion of the honeycomb block body to obtain the honeycomb structure.

Abstract: A die was provided for forming a honeycomb body having a structure provided with groovy slits on a front face thereof, the slits being formed by cell blocks and back holes on a back surface thereof, each hole being communicatively connected with the slit. The die is made of cemented carbide having wear resistance. The cemented carbide is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness. A connection area ratio of the back hole and the cell block is 35 to 65%.

Abstract: The present invention provides a method for manufacturing a honeycomb structure, the method including steps of: forming, by extrusion, a formed body 1 having an outer wall, partition walls provided inside the outer wall, and cells each surrounded by the partition walls as well as extending to an axial direction of the body; and drying the formed body 1.

Abstract: A method of drying a honeycomb formed body comprising an outer wall, partition walls disposed inside the outer wall, and cells surrounded by the partition walls and extending in an axial direction of the honeycomb formed body. The method of drying a honeycomb formed body comprises a drying step of starting to dry in a state of covering at least a part of the outer wall with a guide covering the outer wall so as not to come into contact with the outer wall. Alternatively, the method of drying a honeycomb formed body comprises a drying step of drying in a state of covering at least a part of the outer wall with a guide that covers the outer wall so as to come into contact with the outer wall, wherein in the drying step the pressure applied to the outer wall by the guide at the contact portion is less than 0.2 MPa.

Abstract: A die was provided for forming a honeycomb body having a structure provided with groovy slits on a front face thereof, the slits being formed by cell blocks and back holes on a back surface thereof, each hole being communicatively connected with the slit. The die is made of cemented carbide having wear resistance. The cemented carbide is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness. A connection area ratio of the back hole and the cell block is 35 to 65%.

Abstract: Disclosed is a die (10) for forming a honeycomb body having a structure provided with groovy slits (2) on a front face thereof, the slits being formed by cell blocks (3) and back holes (4) on a back surface thereof, each hole being communicatively connected with the slit. The number N of the cell blocks per one side of the die is even number. According to the die for forming the honeycomb body, strain generated on an extruded face of the honeycomb body after extrusion and bending of the honeycomb body can be reduced as well as the die can maintain a stable frictional force of extrusion and is excellent in extrudability and wear resistance.

Abstract: A method of producing a honeycomb structure of the present invention includes the steps of: forming plugged portions by dipping an end face of a honeycomb structure in slurry in a container, and pressing the honeycomb structure against an inner bottom surface of the container to force the slurry into at least some of the cells; and bringing out the honeycomb structure from the container to obtain the honeycomb structure having at least some of the cells being plugged. An air layer is formed between the plugged portions and the inner bottom surface of the container to separate them from each other in advance of bringing out the honeycomb structure having plugged portions from the container.

Abstract: There is disclosed a die cleaning method for removing a forming-material from a die used in forming the forming-material containing a binder, comprising the steps of: removing a part or all of the binder contained in the forming-material from the die; and removing the forming-material from the die, whereby the forming-material in the die can be removed without damaging or deforming the die for use in forming the forming-material containing the binder.

Abstract: A method of producing a honeycomb structure of the present invention includes the steps of: forming plugged portions 2 by dipping an end face of a honeycomb structure 1 in slurry 8 in a container 9, and pressing the honeycomb structure against an inner bottom surface of the container 9 to force the slurry 8 into at least some of the cells 8; and bringing out the honeycomb structure 1 from the container 9 to obtain the honeycomb structure 1 having at least some of the cells 3 being plugged. An air layer 10 is formed between the plugged portions 2 and the inner bottom surface of the container 9 to separate them from each other in advance of bringing out the honeycomb structure 1 having plugged portions 2 from the container 9.

Abstract: The present invention provides a method for manufacturing a honeycomb structure, the method including steps of: forming, by extrusion, a formed body 1 having an outer wall, partition walls provided inside the outer wall, and cells each surrounded by the partition walls as well as extending to an axial direction of the body; and drying the formed body 1.

Abstract: Disclosed is a die (10) for forming a honeycomb body having a structure provided with groovy slits (2) on a front face thereof, the slits being formed by cell blocks (3) and back holes (4) on a back surface thereof, each hole being communicatively connected with the slit. The number N of the cell blocks per one side of the die is even number. According to the die for forming the honeycomb body, strain generated on an extruded face of the honeycomb body after extrusion and bending of the honeycomb body can be reduced as well as the die can maintain a stable frictional force of extrusion and is excellent in extrudability and wear resistance.

Abstract: There is disclosed a die cleaning method for removing a forming-material from a die used in forming the forming-material containing a binder, comprising the steps of: removing a part or all of the binder contained in the forming-material from the die; and removing the forming-material from the die, whereby the forming-material in the die can be removed without damaging or deforming the die for use in forming the forming-material containing the binder.

Abstract: A method of drying a honeycomb formed body comprising an outer wall, partition walls disposed inside the outer wall, and cells surrounded by the partition walls and extending in an axial direction of the honeycomb formed body. The method of drying a honeycomb formed body comprises a drying step of starting to dry in a state of covering at least a part of the outer wall 7a and 7b with a guide 12 covering the outer wall 7a and/or 7b so as not to come into contact with the outer wall 7a and/or 7b. Alternatively, the method of drying a honeycomb formed body comprises a drying step of drying in a state of covering at least a part of the outer wall with a guide that covers the outer wall so as to come into contact with the outer wall, wherein in the drying step the pressure applied to the outer wall by the guide at the contact portion is less than 0.2 MPa. A method of drying a honeycomb formed body causing less distortion and cross sectional deformation in the honeycomb formed body is provided.

Abstract: There is disclosed a die (10) for forming a honeycomb body having a structure provided with groovy slits (2) on a front face thereof, the slits being formed by cell blocks (3) and back holes (4) on a back surface thereof, each hole being communicatively connected with the slit. The die (10) is made of cemented carbide having wear resistance. The cemented carbide is formed by compacting, followed by sintering at high temperature, metal carbide powder of transition metal element series with an iron group metal binder having toughness. A connection area ratio of the back hole (4) and the cell block (3) is 35 to 65%. According to the die for forming a honeycomb body and the die jig for forming a honeycomb body using the same, wear resistance of the die or the die jig can be enhanced when the raw material containing the material having very high hardness such as SiC and the like is extruded as well as the defect in shape of an extruded body due to wear of the die can be overcome.