JP5460643B2 - Manufacturing method of plugged honeycomb structure and plugging filling jig - Google Patents

Description

  The present invention relates to a method for manufacturing a plugged honeycomb structure and a plugging filling jig. More specifically, it is suitable for a method for manufacturing a plugged honeycomb structure capable of manufacturing a plugged honeycomb structure with a uniform plugging depth, and a method for manufacturing such a plugged honeycomb structure. The present invention relates to a plugging and filling jig used in the above.

  An exhaust gas discharged from an internal combustion engine such as a diesel engine or various combustion apparatuses contains a large amount of particulates (particulate matter) mainly composed of soot (black smoke). When this particulate is released into the atmosphere as it is, environmental pollution is caused. Therefore, a filter for collecting particulates is generally mounted in an exhaust gas flow path from an internal combustion engine or the like.

  As a filter used for such a purpose, for example, as shown in FIG. 18, a plurality of cells formed by partitioning into a honeycomb shape by porous partition walls 22 and serving as fluid flow paths by the partition walls 24. A plugged honeycomb structure including a honeycomb structure 21 in which 24 are partitioned and a plugged portion 26 that alternately plugs one open end of the plurality of cells 24 and the other open end. Honeycomb filter using 28 is mentioned. According to the plugged honeycomb structure 28 shown in FIG. 18, by causing the exhaust gas G1 to flow into the cell 24 from the end surface B on the exhaust gas inflow side, when the exhaust gas G1 passes through the partition wall 22, the particulates in the exhaust gas G1 are changed. Since it is collected by the partition wall 22, the purified gas G <b> 2 from which the particulates have been removed can flow out from the purified gas outflow side end face C.

  Then, as a method for manufacturing the plugged honeycomb structure as described above, for example, as shown in FIG. 19, an adhesive sheet or the like is attached to one end face of the honeycomb structure 21, and laser using image processing is used. A mask 25 (a plugging portion forming mask) is formed by punching only a portion corresponding to the cell 24 (plugging cell) to be plugged, such as the pressure-sensitive adhesive sheet, by processing or the like. The end face of the attached honeycomb structure 21 is immersed in a slurry 29 (ceramic slurry), and the plugging cells of the honeycomb structure 21 are filled with the slurry to form plugging portions 26 (see FIG. 1). A method has been proposed in which a plugged honeycomb structure is obtained by performing the same step on the other end face of the honeycomb structure 21 and then drying and firing the honeycomb structure 21 (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-300922

  However, in such a conventional method for manufacturing a plugged honeycomb structure, as shown in FIG. 19, when the honeycomb structure 21 to which the mask 25 is adhered is pressed against the slurry 29, it is stored in the container 27 or the like. There is a problem that the slurry 29 is not introduced into the plugged cells 24 at a uniform depth because the slurry 29 that flows is flowed in a direction with less resistance when pressed.

  The present invention has been made in view of such problems of the prior art, and the problem is that a plugged honeycomb structure having a uniform plugging depth can be manufactured. Provided are a method for manufacturing a plugged honeycomb structure, and a plugging filling jig suitably used in the method for manufacturing such a plugged honeycomb structure.

  The present invention provides the following plugged honeycomb structure manufacturing method and plugging filling jig.

[1] A honeycomb structure having a partition wall made of a porous body, in which a large number of cells serving as fluid flow paths are partitioned and formed by the partition wall, and an opening of any of the cells of the honeycomb structure A plugged honeycomb structure having a plugging portion for plugging the plug, wherein one of the honeycomb structures on the side where the cells to be plugged (plugged cells) are open A plugging and filling jig is disposed so as to cover the outer peripheral side of the end portion and the tip end portion thereof is substantially in the same position as the end face of the one end portion, and the one end of the honeycomb structure Ceramics in which the one end of the honeycomb structure and the plugging and filling jig are placed on a flat plate member, the outer diameter of the portion side being increased and the plugging and filling jig being disposed A ceramic slurry stored inside a container having a rally or bottom and side surfaces A step of forming the plugged portion by introducing the ceramic slurry into the plugged cell by pressing, and using an elastic cylindrical body as the plugging filling jig, A method for manufacturing a plugged honeycomb structure in which the plugging filling jig is disposed on the one end side of the honeycomb structure by an elastic force of the plugging jig .

[2] The ceramic slurry is introduced into the plugging cell by disposing the plugging filling jig at the one end portion so that the outer diameter on the one end side of the honeycomb structure is reduced. The method for manufacturing a plugged honeycomb structure according to the above [1], wherein the length of the plugging depth is increased by 2/3 or more.

[3] The plugging filling jig is disposed after disposing a plugging portion forming mask in which holes that can communicate with the plugging cells are disposed in the honeycomb structure. ] Or the manufacturing method of the plugged honeycomb structure according to [2].

[4] An unfired honeycomb dried body is used as the honeycomb structure, and the plugged cells are filled with the ceramic slurry, and then dried and fired to obtain the plugged honeycomb structure. [1] A method for manufacturing a plugged honeycomb structure according to any one of to [3].

[5] An outer diameter on the one end side of the honeycomb structure disposed at one end of the honeycomb structure on the side where the cells to be plugged (plugged cells) are open. Ceramic slurry stored on the inside of a container having a bottom surface and a side surface, or a ceramic slurry placed on a flat plate member, the one end of the honeycomb structure having an increased outer diameter A plugging and filling jig used for introducing the ceramic slurry into the plugged cells by being pressed against the honeycomb structure, and the outer periphery of the honeycomb structure in which the plugged cells are formed. The one end portion of the honeycomb structure having an inner diameter corresponding to the thickness and having a thickness that can increase the outer diameter of the one end portion side of the honeycomb structure. By placing on the side A plugging and filling jig that can be installed and fixed on the one end side of the honeycomb structure by being in close contact with the honeycomb structure in the radial direction by the elastic force of the tubular body .

  According to the method for manufacturing a plugged honeycomb structure of the present invention, a plugged honeycomb structure with a uniform plugging depth can be manufactured. Moreover, the plugging and filling jig of the present invention can be suitably used in the above-described method for manufacturing a plugged honeycomb structure of the present invention.

It is a perspective view which shows typically the plugged honeycomb structure manufactured by the example of the manufacturing method of a plugged honeycomb structure. It is explanatory drawing explaining the process of introduce | transducing a ceramic slurry in the inside of a plugged cell in an example of the manufacturing method of a plugged honeycomb structure, and is sectional drawing parallel to the axial direction of a honeycomb structure. It is explanatory drawing explaining the process of introduce | transducing a ceramic slurry in the inside of a plugged cell in an example of the manufacturing method of a plugged honeycomb structure, and is sectional drawing parallel to the axial direction of a honeycomb structure. It is explanatory drawing explaining the process of introduce | transducing a ceramic slurry in the inside of a plugged cell in an example of the manufacturing method of a plugged honeycomb structure, and is sectional drawing parallel to the axial direction of a honeycomb structure. It is a perspective view which shows an example of the plugging filling jig used for an example of the manufacturing method of a plugged honeycomb structure. It is a perspective view which shows the other example of the plugging filling tool used for an example of the manufacturing method of a plugged honeycomb structure. It is explanatory drawing explaining the other example of the process of introduce | transducing a ceramic slurry in the inside of a plugged cell in an example of the manufacturing method of a plugged honeycomb structure, and is sectional drawing parallel to the axial direction of a honeycomb structure. is there. FIG. 5 is an explanatory diagram for explaining a process of introducing a ceramic slurry into the plugged cells in an embodiment of the method for manufacturing a plugged honeycomb structure of the present invention, which is parallel to the axial direction of the honeycomb structure. It is sectional drawing. FIG. 5 is an explanatory diagram for explaining a process of introducing a ceramic slurry into the plugged cells in an embodiment of the method for manufacturing a plugged honeycomb structure of the present invention, which is parallel to the axial direction of the honeycomb structure. It is sectional drawing. FIG. 5 is an explanatory diagram for explaining a process of introducing a ceramic slurry into the plugged cells in an embodiment of the method for manufacturing a plugged honeycomb structure of the present invention, which is parallel to the axial direction of the honeycomb structure. It is sectional drawing. 1 is a perspective view showing an example of a plugging and filling jig used in an embodiment of a method for manufacturing a plugged honeycomb structure of the present invention. FIG. 6 is an explanatory diagram for explaining another example of the step of introducing a ceramic slurry into the plugged cells in one embodiment of the method for manufacturing a plugged honeycomb structure of the present invention. It is sectional drawing parallel to a direction. It is a graph which shows each plugging depth in 85 cells on the diagonal of the end surface in the reference example 1. FIG. It is a graph which shows each plugging depth in 85 cells on the diagonal of an end surface in comparative example 1. 6 is a graph showing each plugging depth in 70 cells on the diagonal of the end face in Example 1; It is a graph which shows each plugging depth in 70 cells on the diagonal of an end surface in Example 2. FIG. It is a graph which shows each plugging depth in 70 cells on the diagonal of an end surface in comparative example 2. It is a schematic sectional drawing which shows the conventional honeycomb filter. It is explanatory drawing explaining the process of introduce | transducing a ceramic slurry in the inside of a plugged cell in the manufacturing method of the conventional plugged honeycomb structure, and is sectional drawing parallel to the axial direction of a honeycomb structure.

  Hereinafter, embodiments of a method for manufacturing a plugged honeycomb structure and a plugging filling jig according to the present invention will be described in detail with reference to the drawings. However, the present invention is construed as being limited thereto. However, various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

  First, an example of a method for manufacturing a plugged honeycomb structure will be described. FIG. 1 is a perspective view schematically showing a plugged honeycomb structure manufactured by an example of a method for manufacturing a plugged honeycomb structure. The present plugged honeycomb structure manufacturing method has a partition wall 2 made of a porous body as shown in FIG. 1, and a cylinder in which a large number of cells 4 serving as fluid flow paths are partitioned and formed by the partition wall 2. This is a method for manufacturing a plugged honeycomb structure 1 including a honeycomb structure 3 and a plugged portion 5 that plugs any opening of a cell 4 of the honeycomb structure 3.

  As shown in FIG. 2, the manufacturing method of the present plugged honeycomb structure includes an outer periphery of one end portion 7a on the side where the cells 4a (plugged cells) to be plugged of the honeycomb structure 3 are opened. The plugging and filling jig 6 is disposed so as to cover the side and its tip protrudes from the end face of the one end 7a, and the end face on the one end 7a side is partitioned from the outer peripheral space. 3 and FIG. 4, by pressing one end 7a of the honeycomb structure 3 provided with the plugging filling jig 6 against the ceramic slurry 9, the ceramic slurry 9 is placed inside the plugged cells 4a. To form a plugged portion 5 (see FIG. 1). 2 to 4 are explanatory views for explaining a process of introducing the ceramic slurry into the plugged cells in the manufacturing method of the plugged honeycomb structure, which is parallel to the axial direction of the honeycomb structure. It is sectional drawing.

  By comprising in this way, the ceramic slurry 9 introduce | transduced into the inside of the plugged cell 4a can be divided into the site | part divided from the outer peripheral space by the side of one edge part 7a. For this reason, when one end 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9, the ceramic slurry 9 to be introduced into the plugged cells 4a becomes the one end 7a of the honeycomb structure 3. From this, it is possible to effectively prevent the ceramic slurry 9 from flowing in the outer peripheral direction, and the ceramic slurry 9 can be introduced into the plugged cell at a uniform depth.

  In the manufacturing method of the plugged honeycomb structure, plugged cells 4a are formed on the end surface of one end portion 7a of the honeycomb structure 3 so that the ceramic slurry 9 is not introduced into cells other than the plugged cells 4a. A plugging portion forming mask 8 in which holes that can communicate with the plugs are formed. As the plugging portion forming mask 8, a plugging portion forming mask used in a conventional method for manufacturing a plugged honeycomb structure can be suitably used. When the plugging and filling jig 6 is disposed, the plugging and filling jig 6 is disposed after the plugging portion forming mask 8 is disposed on the honeycomb structure 3. It is preferable. By comprising in this way, the ceramic slurry 9 can be favorably introduced into the plugged cells 4a.

  2 to 4 show the case where the ceramic slurry 9 is placed on the flat member 10 and the one end 7a side of the honeycomb structure 3 is pressed against the ceramic slurry 9, The ceramic slurry 9 may be stored in a container or the like having a bottom surface and side surfaces.

  Further, the thickness of the ceramic slurry 9 placed on the flat member 10 (the depth of the ceramic slurry when the ceramic slurry is stored inside a container or the like) is placed in the plugging cell 4a. The depth is preferably about 1/3 of the depth of introduction of (hereinafter also referred to as “plugging depth”).

  Moreover, the ceramic slurry 9 can be introduced into the plugged cells 4a at a more uniform depth by leveling the surface with a member such as a squeegee.

  As shown in FIG. 1, the honeycomb structure 3 used in the method for manufacturing the plugged honeycomb structure includes partition walls 2 made of a porous body, and the partition walls 2 allow a large number of cells 4 to serve as fluid flow paths. Is a cylindrical shape that is partitioned and formed. Note that the honeycomb structure 3 is a relatively fragile structure in which the partition walls 2 are formed of a very thin porous body. Therefore, it is general to have a structure further including an outer wall 12 as a reinforcing member so as to cover the outer periphery thereof. Thereby, the mechanical strength of the whole honeycomb structure 3 can be improved, and deformation, breakage, etc. during use can be effectively prevented.

  As long as the above conditions are satisfied, the material constituting the honeycomb structure 3 (the partition walls 2 and the outer wall 12) is not particularly limited. However, since the partition walls 2 need to be porous, a ceramic (for example, , Cordierite, etc.) is preferably used.

  The honeycomb structure 3 used in the method for manufacturing the plugged honeycomb structure may be an undried formed body formed by molding a material made of ceramic as described above, or a dried body obtained by drying the formed body. It may be a sintered body obtained by firing a dried body.

  Further, the shape of the honeycomb structure 3 is not particularly limited, and various shapes such as a cylindrical shape, a quadrangular prism shape, and a triangular prism shape can be employed. Further, the cell shape (the shape of the cell 4 in a plane perpendicular to the flow path) is not particularly limited. For example, various polygonal shapes such as a triangle, a quadrangle, a hexagon, and an octagon, a circle, an ellipse, and an ellipse. The shapes can be used alone or in combination.

  In the method for manufacturing the plugged honeycomb structure, the method for manufacturing the honeycomb structure 3 is not particularly limited. For example, a ceramic clay adjusted to have an appropriate viscosity is obtained by using a desired cell shape, partition wall thickness, A preferable example is a method of obtaining the honeycomb structure 3 by extrusion molding using a die having a cell density (cell pitch) and drying. The pattern of the plugged portions 5 is generally a staggered pattern, but is not particularly limited thereto, and may be a row shape or a concentric shape.

  As shown in FIG. 2, the manufacturing method of the present plugged honeycomb structure includes one side on the side where the cells 4a (plugged cells) to be plugged of the honeycomb structure 3 thus configured are open. The plugging and filling jig 6 is disposed so as to cover the outer peripheral side of the end 7a and the tip of the end 7a protrudes from the end surface of the one end 7a, and the end surface on the one end 7a side is The ceramic slurry 9 which is partitioned from the space and becomes the plugged portion 5 (see FIG. 1) is introduced into the plugged cells 4a of the honeycomb structure 3 to form the plugged portion 5 (see FIG. 1). Is.

  The material constituting the ceramic slurry 9 used in the method for manufacturing the plugged honeycomb structure is not particularly limited, but a ceramic powder, for example, cordierite powder, which is kneaded by adding a binder, a dispersion medium, or the like. Can be suitably used. About the kind of ceramic powder, it is preferable that it is the same kind as the material which comprises the partition 2 of the honeycomb structure 3 shown in FIG. 1, for example.

  In the method for manufacturing the plugged honeycomb structure, for example, as shown in FIG. 5, a cylindrical body 6a having elasticity is used as the plugging and filling jig 6, and the elastic force of the plugging and filling jig 6 is used. Accordingly, the plugging and filling jig 6 can be disposed on the one end portion 7a side of the honeycomb structure 3. Such a plugging and filling jig 6 has adhesiveness in the radial direction of the honeycomb structure 3 by elastic force, and therefore can be easily and reliably disposed on the one end portion 7a side of the honeycomb structure 3. it can.

  As the plugging and filling jig 6 made of such a cylindrical body 6a having elasticity, one formed from a conventionally known rubber such as a diene rubber or a non-diene rubber can be used. Rubber, synthetic isoprene rubber, butadiene rubber, styrene-butadiene rubber, ethylene-α-olefin copolymer rubber, ethylene-α-olefin-diene copolymer rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, halogenated butyl rubber, silicon rubber A preferable example is a cylindrical body made of fluorine rubber, urethane rubber, acrylic rubber, chlorinated polyethylene, or the like.

  Further, as another example of the plugging and filling jig used in the manufacturing method of the plugged honeycomb structure, for example, as shown in FIG. 6, a band-like body 6 b is used as the plugging and filling jig 6. By plugging the band-like body 6 b to the one end portion 7 a side of the honeycomb structure 3, the plugging filling jig 6 can be disposed on the one end portion 7 a side of the honeycomb structure 3. Such a plugging and filling jig 6 is used by being wound on one end portion 7a side of the honeycomb structure 3, so that it can correspond to the honeycomb structures 3 having different shapes and sizes. In particular, when the band-like body 6b is rubbed against the one end portion 7a side of the honeycomb structure 3, the band-like body 6b may be rubbed so as to overlap more than twice. By keeping the length relatively long, it becomes possible to correspond to honeycomb structures 3 having various shapes and sizes.

  As the plugging and filling jig 6 made of such a strip-like body 6b, for example, a material made of a material such as resin, metal, alloy or the like can be cited as a suitable example. As the resinous belt-like body 6b, for example, a polyethylene film having a thickness of about 0.1 to 0.5 mm, a kraft paper whose surface is coated with a polypropylene resin, or the like can be used. The resinous belt-like body 6b is rubbed against the one end portion 7a side of the honeycomb structure 3, and then fixed by adhesion, fusion, or adhesive tape.

  Further, in the case of the band-like body 6b made of a thin metal or alloy, the band-shaped body 6b can be fixed using adhesion, fusion bonding, adhesive tape or the like after being rubbed on the one end 7a side of the honeycomb structure 3. . Further, when the strip 6b is formed by a leaf spring, a restoring force is generated in a direction to be applied to the honeycomb structure 3, and is fixed to one end portion 7a of the honeycomb structure 3 by the restoring force. It becomes possible. As such a strip-like body 6b, for example, a stainless steel plate having a thickness of 0.1 to 0.3 mm can be used.

  Moreover, in the manufacturing method of this plugged honeycomb structure, as shown in FIG. 7, as a plugging filling jig 6, a cylindrical body 6 a for partitioning the end surface on the one end portion 7 a side from the outer peripheral space. (In FIG. 7, the case of the cylindrical body 6a is shown) or the strip-shaped body 6b (see FIG. 6), and this cylindrical body 6a or the strip-shaped body 6b (see FIG. 6) You may use what has the holding | maintenance part 6c for hold | maintaining to the edge part 7a. As described above, by using the plugging and filling jig 6 having the holding portion 6c, the cylindrical body 6a or the band-shaped body 6b (see FIG. 6) needs to have adhesion to the honeycomb structure 3 itself. For example, it is not necessary to adhere and fix the resinous film described above. Here, FIG. 7 is an explanatory diagram for explaining another example of the process of introducing the ceramic slurry into the plugged cells in the method for manufacturing the plugged honeycomb structure, and in the axial direction of the honeycomb structure. It is parallel sectional drawing.

  The holding portion 6c is not particularly limited as long as it can hold the cylindrical body 6a or the band-like body 6b (see FIG. 6) on one end portion 7a of the honeycomb structure 3, but for example, a coil spring In addition, a tube body that can tighten the outer peripheral portion of the honeycomb structure 3 by pressurizing and depressurizing can be given as a suitable example.

  Further, in the present plugged honeycomb structure manufacturing method, the plugging and filling jig 6 has rigidity that does not cause deformation in the radial direction of the honeycomb structure 3 when pressed against the ceramic slurry 9, that is, It is preferable to use a material that can withstand the internal pressure of the ceramic slurry 9 generated during pressing. By using such a plugging filling jig 6, the size of the region partitioning the end surface on the one end 7a side from the outer peripheral space can be kept constant, and introduced into the plugging cell 4a. The amount of the ceramic slurry 9 to be performed can be accurately controlled.

  The rigidity of the honeycomb structure 3 that is not deformed in the radial direction is a value determined by the composition of the ceramic slurry 9 to be used and its viscosity, the size of the outer shape of the honeycomb structure 3, and the like. It is preferable to determine appropriately according to the conditions.

  Further, in the manufacturing method of the plugged honeycomb structure, as shown in FIGS. 2 to 4, the front end portion of the plugging filling jig 6 is slid to the end surface on the one end portion 7 a side of the honeycomb structure 3. The one end portion 7a of the honeycomb structure 3 is preferably pressed against the ceramic slurry 9 while the honeycomb structure 3 is pressed. Thereby, the end surface on the one end portion 7a side of the honeycomb structure 3 is finally placed on the flat member 10 on which the ceramic slurry 9 is placed (for example, when the ceramic slurry 9 is stored in a container or the like). The ceramic slurry 9 existing in the region partitioned by the plugging and filling jig 6 can be introduced into the plugging cell 4a in its entirety.

  In the method for manufacturing the plugged honeycomb structure, after the ceramic slurry 9 is introduced into the plugged cells 4a at the one end portion 7a of the honeycomb structure 3, the honeycomb structure 3 is introduced. Also in the other end portion 7b, the ceramic slurry 9 may be introduced into the cells 4b other than the plugged cells 4a in the one end portion 7a by the same method as described above. Thereby, the plugged portions 5 (see FIG. 1) can be alternately formed in the cells 4 of the one end portion 7a and the other end portion 7b of the honeycomb structure 3.

  After the ceramic slurry 9 is introduced into the predetermined cell 4 in this manner, the ceramic slurry 9 is dried and further baked to thereby have a partition wall 2 made of a porous material as shown in FIG. 2, a cylindrical honeycomb structure 3 in which a large number of cells 4 serving as fluid flow paths are partitioned and formed, and a plugging portion 5 that plugs any opening of the cells 4 of the honeycomb structure 3. A plugged honeycomb structure 1 having the above is manufactured. When the honeycomb structure 3 used for plugging is an unfired formed body or a dried body that has only been dried, the ceramic slurry 9 introduced into the plugged cells 4a (see FIG. 4) at the same time, the honeycomb structure 3 is dried and fired to manufacture the plugged honeycomb structure 1.

  Next, an embodiment of a method for manufacturing a plugged honeycomb structure of the present invention will be described. The method for manufacturing a plugged honeycomb structure of the present embodiment also has partition walls 2 made of a porous material as shown in FIG. 1, as in the method for manufacturing a plugged honeycomb structure described so far. Then, the cylindrical honeycomb structure 3 in which a large number of cells 4 serving as fluid flow paths are partitioned and formed by the partition walls 2 and the plugging for plugging any one of the openings of the cells 4 of the honeycomb structure 3 This is a method for manufacturing a plugged honeycomb structure 1 having a portion 5.

  As shown in FIG. 8, the manufacturing method of the plugged honeycomb structure of the present embodiment is one side of the honeycomb structure 3 on the side where the cells to be plugged (plugged cells 4a) are open. The plugging and filling jig 16 is disposed so as to cover the outer peripheral side of the end portion 7a and the tip end portion thereof is substantially in the same position as the end surface of the one end portion 7a, and one of the honeycomb structures 3 is disposed. The outer diameter on the end portion 7a side is increased and, as shown in FIGS. 9 and 10, one end portion 7a of the honeycomb structure 3 provided with the plugging and filling jig 16 is pressed against the ceramic slurry 9. Thus, the plugged honeycomb structure is manufactured by introducing the ceramic slurry 9 into the plugged cells 4a to form the plugged portions 5 (see FIG. 1). 8 to 10 are explanatory views for explaining a process of introducing the ceramic slurry into the plugged cells in the method for manufacturing the plugged honeycomb structure of the present embodiment. It is sectional drawing parallel to an axial direction.

  As described in the example of the method for manufacturing the plugged honeycomb structure, in the conventional method for manufacturing the plugged honeycomb structure, as shown in FIG. When pressed against (ceramic slurry), the slurry 29 to be introduced into the plugged cells 24a flows from one end of the honeycomb structure 21 in the outer peripheral direction, and the plugged cells 24a There was a problem that the slurry 29 was not introduced at a uniform depth.

  Such a problem is caused by the fact that the slurry 29 has fluidity and is caused to flow toward the side with less resistance at the time of pressing. Therefore, the influence on the plugging depth due to the flow of the slurry 29 is as follows. It is more prominent on the outer peripheral side of the honeycomb structure 21, and conversely, on the inner side that is a predetermined distance away from the outer wall of the honeycomb structure 21, there is little influence of the flow of the slurry 29, and the slurry has substantially the same depth. It was confirmed that 29 was introduced.

  For this reason, the manufacturing method of the plugged honeycomb structure of the present embodiment is as shown in FIG. 8 with respect to the outer peripheral portion where the amount of ceramic slurry introduced has been significantly reduced in the conventional method. The honeycomb structure 3 in which the ceramic slurry 9 is actually introduced by disposing a plugging and filling jig 16 and increasing the size of the outer periphery of the portion where the plugging and filling jig 16 is disposed. In contrast, the influence of the flow of the ceramic slurry 9 on the plugging depth is extremely reduced. Thereby, the ceramic slurry 9 can be introduced into the plugged cells 4a of the honeycomb structure 3 with a uniform depth.

  In the manufacturing method of the plugged honeycomb structure of the present embodiment, the end surface of one end portion 7a of the honeycomb structure 3 is not introduced into the cells other than the plugged cells 4a so that the ceramic slurry 9 is not introduced. A plugging portion forming mask 8 in which holes that can communicate with the plugging cells 4a are formed. As the plugging portion forming mask 8, a plugging portion forming mask used in a conventional method for manufacturing a plugged honeycomb structure can be suitably used. When the plugging and filling jig 16 is disposed, the plugging and filling jig 16 is disposed after the plugging portion forming mask 8 is disposed on the honeycomb structure 3. Is preferred. By comprising in this way, the ceramic slurry 9 can be favorably introduced into the plugged cells 4a.

  In the manufacturing method of the plugged honeycomb structure of the present embodiment, the honeycomb structure 3 and the ceramic slurry 9 to be used are the same as those described in the example of the manufacturing method of the plugged honeycomb structure. A thing can be used suitably. The ceramic slurry 9 is placed on a flat plate member 10 or stored inside a container (not shown) or the like, similar to the one described in the example of the method for manufacturing the plugged honeycomb structure. Can be used.

  In the manufacturing method of the plugged honeycomb structure of the present embodiment, the outer diameter on the one end portion 7a side of the honeycomb structure 3 is increased by disposing the plugging filling jig 16, and the conventional method is provided. In the method, it is necessary to occupy the outer peripheral portion where the introduction amount of the ceramic slurry 9 is significantly reduced by the plugging and filling jig 16.

  In addition, when the ceramic slurry 9 is introduced, the size of the range in which the introduction amount is significantly reduced is determined by the plugging depth into which the ceramic slurry 9 is introduced, the viscosity of the ceramic slurry 9 to be used, and the like. It is preferable to determine appropriately. For example, it is preferable to increase the outer diameter of the honeycomb structure 3 on the one end 7a side by a length equal to or more than two-thirds of the plugging depth. In addition, although it does not specifically limit, It is preferable that the viscosity of the ceramic slurry 9 used in this case is about 150-500 dPa * s, for example.

As the plugging filling jig 16 used in the method for manufacturing the plugged honeycomb structure of the present embodiment, as shown in FIG. 11, the outer periphery of the honeycomb structure 3 in which the plugged cells 4 are formed is used. The cylindrical structure 16a has an inner diameter corresponding to the size and can increase the size of the outer periphery on the one end 7a side of the honeycomb structure 3, and the one end 7a of the honeycomb structure 3 The thing which can be installed and fixed to the side can be mentioned. In particular, as the plugging filling jig 16 made of such a cylindrical body 16a, Ru have use those having elasticity. Such a plugging and filling jig 16 has adhesiveness in the radial direction of the honeycomb structure 3 by elastic force, and therefore can be easily and reliably disposed on the one end portion 7a side of the honeycomb structure 3. it can.

  As the plugging and filling jig made of such a cylindrical body having elasticity, one formed from a conventionally known rubber such as a diene rubber or a non-diene rubber can be used. For example, natural rubber, Synthetic isoprene rubber, butadiene rubber, styrene-butadiene rubber, ethylene-α-olefin copolymer rubber, ethylene-α-olefin-diene copolymer rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, halogenated butyl rubber, silicon rubber, fluorine Preferable examples include cylindrical bodies made of rubber, urethane rubber, acrylic rubber, chlorinated polyethylene, and the like.

  Although not shown, in the method for manufacturing a plugged honeycomb structure of the present embodiment, a relatively long strip is used as a plugging filling jig, and the strip is used as a honeycomb. It is also possible to use a structure that can be installed and fixed by being rubbed multiple times on one end side of the structure.

  Further, in the manufacturing method of the plugged honeycomb structure of the present embodiment, as shown in FIG. 12, the plugging and filling jig 16 is bent in the radial direction at the end face of the honeycomb structure 3, and the honeycomb structure A cylindrical body 16a configured to increase the outer diameter on one end side of the body 3, and a holding portion 16c for holding the cylindrical body 16a on one end 7a of the honeycomb structure 3; It is also possible to use one having In this way, by using the plugging and filling jig 16 having the holding portion 16c, the cylindrical body 16a itself does not need to have adhesion to the honeycomb structure 3.

  Moreover, as the plugging and filling jig 16, if the outer diameter of the end face of the honeycomb structure 3 can be increased, an effect of reducing the influence on the plugging depth due to the flow of the ceramic slurry 9 can be obtained. Therefore, a cylindrical body 16a configured to bend in the radial direction at the end face of the honeycomb structure 3 and increase the outer diameter on one end side of the honeycomb structure 3 may be used.

  The holding portion 16c is not particularly limited as long as it can hold the cylindrical body 16a on one end portion 7a of the honeycomb structure 3, but for example, by a coil spring or by applying a pressure increase / decrease A tube body capable of fastening the outer peripheral portion of the honeycomb structure 3 can be given as a suitable example.

  In the method for manufacturing a plugged honeycomb structure of the present embodiment, as shown in FIGS. 8 to 10, while one end portion 7 a of the honeycomb structure 3 is pressed against the ceramic slurry 9, The plugging and filling jig 16 is preferably fixed so as not to move in the axial direction of the honeycomb structure 3. If the plugging and filling jig 16 moves in the axial direction of the honeycomb structure 3, the flow state of the ceramic slurry 9 at the time of pressing changes, and the ceramic slurry 9 is uniformly distributed in the plugged cells 4a. It may be difficult to fill.

  In this way, after the ceramic slurry 9 is introduced into the plugged cells 4a of the honeycomb structure 3, the ceramic slurry 9 is dried and further fired to obtain a porous body as shown in FIG. A cylindrical honeycomb structure 3 in which a large number of cells 4 serving as fluid flow paths are partitioned and formed by the partition wall 2, and an opening of any of the cells 4 of the honeycomb structure 3 A plugged honeycomb structure 1 including a plugging portion 5 that plugs the plug is manufactured. When the honeycomb structure 3 used for plugging is an unfired formed body or a dried body that has only been dried, the ceramic slurry 9 introduced into the plugged cells 4a (see FIG. At the same time, the honeycomb structure 3 is dried and fired to manufacture the plugged honeycomb structure 1.

  In the method for manufacturing a plugged honeycomb structure of the present embodiment, after plugging at one end 7a of the honeycomb structure 3, the other end 7b of the honeycomb structure 3 is also plugged. Alternatively, the ceramic slurry 9 may be introduced into the cells 4b other than the plugged cells 4a at the one end 7a by the same method as described above.

  Next, an example of a plugging and filling jig will be described. This plugging and filling jig is a plugging and filling jig that is preferably used in the method for manufacturing a plugged honeycomb structure described so far.

  The plugging filling jig is disposed at one end 7a on the side where the cells 4a (plugging cells) to be plugged of the honeycomb structure 3 are opened as shown in FIG. The end surface on the one end portion 7a side of the honeycomb structure 3 is partitioned from the outer peripheral space, and the one end portion 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 2) to thereby form the plugging cell 4a. Plugging and filling jig 6 used for introducing ceramic slurry 9 (see FIG. 2) into the inside of the honeycomb structure 3 corresponding to the size of the outer periphery of the honeycomb structure 3 in which the plugging cells 4a are formed. The plugging and filling jig 6 includes a cylindrical body 6a having an inner diameter, and can be installed and fixed so as to partition the end surface on the one end portion 7a side of the honeycomb structure 3 from the outer peripheral space.

  The plugging filling jig 6 can partition a predetermined amount of the ceramic slurry 9 (see FIG. 2) to be introduced into the plugging cell 4a in a portion partitioned from the outer peripheral space on the one end 7a side. When one end 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 2), the ceramic slurry 9 (see FIG. 2) is introduced into the plugged cells 4a at a uniform depth. can do.

  Further, the plugging and filling jig 6 is preferably composed of a cylindrical body 6a having elasticity. Such a plugging and filling jig 6 has adhesiveness in the radial direction of the honeycomb structure 3 due to its elastic force, and therefore can be easily and reliably disposed on the one end portion 7a side of the honeycomb structure 3. Can do.

  As the plugging and filling jig 6 made of such a cylindrical body 6a having elasticity, one formed from a conventionally known rubber such as a diene rubber or a non-diene rubber can be used. Rubber, synthetic isoprene rubber, butadiene rubber, styrene-butadiene rubber, ethylene-α-olefin copolymer rubber, ethylene-α-olefin-diene copolymer rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, halogenated butyl rubber, silicon rubber A preferable example is a cylindrical body made of fluorine rubber, urethane rubber, acrylic rubber, chlorinated polyethylene, or the like.

  The plugging and filling jig 6 is configured in the same manner as the plugging and filling jig made of a cylindrical body described in the example of the method for manufacturing the plugged honeycomb structure. It can be used by the method described in one example of the structure manufacturing method.

  Next, another example of the plugging and filling jig will be described. This plugging and filling jig is a plugging and filling jig that is preferably used in the method for manufacturing a plugged honeycomb structure described so far.

  As shown in FIG. 6, the plugging filling jig is disposed at one end portion 7a on the side where the cells 4a (plugging cells) to be plugged of the honeycomb structure 3 are opened. The end surface on the one end portion 7a side of the honeycomb structure 3 is partitioned from the outer peripheral space, and the one end portion 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 2) to thereby form the plugging cell 4a. Plugging and filling jig 6 used for introducing ceramic slurry 9 (see FIG. 2) into the inside of the honeycomb structure 3, comprising a band-like body 6 b longer than the outer peripheral length of the honeycomb structure 3. The plugging and filling jig 6 can be installed and fixed so as to partition the end face of the honeycomb structure 3 on the one end portion 7a side from the outer peripheral space.

  The plugging filling jig 6 can partition a predetermined amount of the ceramic slurry 9 (see FIG. 2) to be introduced into the plugging cell 4a in a portion partitioned from the outer peripheral space on the one end 7a side. When one end 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 2), the ceramic slurry 9 (see FIG. 2) is introduced into the plugged cells 4a at a uniform depth. can do.

  As the plugging and filling jig 6 made of such a strip-like body 6b, for example, a material made of a material such as resin, metal, alloy or the like can be cited as a suitable example. As the resinous belt-like body 6a, for example, a polyethylene film having a thickness of about 0.1 to 0.5 mm, a kraft paper whose surface is coated with a polypropylene resin, or the like can be used. The resinous belt-like body 6a is rubbed on one end portion 7a side of the honeycomb structure 3 and then fixed by adhesion, fusion, or adhesive tape.

  Further, in the case of the band-like body 6b made of a thin metal or alloy, the band-shaped body 6b can be fixed using adhesion, fusion bonding, adhesive tape or the like after being rubbed on the one end 7a side of the honeycomb structure 3. . Further, when the band-like body 6b is formed by a leaf spring, a restoring force is generated in a direction to be rubbed against one end portion 7a of the honeycomb structure 3, and one of the honeycomb structures 3 is caused by the restoring force. It becomes possible to fix to the end 7a. As such a strip-like body 6b, for example, a stainless steel plate having a thickness of 0.1 to 0.3 mm can be used. The plugging and filling jig 6 of the present embodiment is configured in the same manner as the plugging and filling jig made of the belt-like body described in the embodiment of the first invention. It can be used by the method described in the embodiment of the invention.

  Next, an embodiment of the plugging and filling jig of the present invention will be described. The plugging and filling jig of the present embodiment is a plugging and filling jig suitably used in the embodiment of the method for manufacturing a plugged honeycomb structure of the present invention.

  As shown in FIG. 11, the plugging and filling jig of the present embodiment has one end 7a on the side where the cells 4a (plugged cells) to be plugged of the honeycomb structure 3 are open. The outer diameter of the honeycomb structure 3 on one end 7a side is increased, and the one end 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 8). A plugging and filling jig 16 used for introducing the ceramic slurry 9 (see FIG. 8) into the plugged cells 4a, and the size of the outer periphery of the honeycomb structure 3 in which the plugged cells 4a are formed. The cylindrical body 16a has an inner diameter corresponding to the thickness and can increase the outer diameter on the one end 7a side of the honeycomb structure 3, and is installed on the one end 7a side of the honeycomb structure 3. A jig 16 for plugging and filling that can be fixed.

  By disposing the plugging and filling jig 16 of the present embodiment on the one end 7a side of the honeycomb structure 3, the plugging and filling jig 16 reduces the outer diameter on the one end 7a side. It is possible to increase the amount of ceramic slurry introduced by the conventional method and to occupy the outer peripheral portion, which has been a problem, with the plugging and filling jig. For this reason, for the honeycomb structure 3 positioned on the inner side by the thickness from the outer surface of the plugging filling jig 16, the plugging depth due to the flow of the ceramic slurry 9 (see FIG. 8) The influence can be made extremely small, and when one end 7a of the honeycomb structure 3 is pressed against the ceramic slurry 9 (see FIG. 8), the ceramic slurry 9 has a uniform depth inside the plugged cells 4a. (See FIG. 8) can be introduced.

  The plugging and filling jig 16 of the present embodiment is configured in the same manner as the plugging and filling jig described in the embodiment of the method for manufacturing a plugged honeycomb structure of the present invention. Yes, it can be used by the method described in the embodiment of the method for manufacturing a plugged honeycomb structure of the present invention. Further, as shown in FIG. 12, the plugging and filling jig 16 of the present embodiment is bent in the radial direction at the end face of the honeycomb structure 3 as the plugging and filling jig 16, and the honeycomb structure 3 One having a cylindrical body 16a configured to increase the outer diameter on one end side, and a holding portion 16c for holding the cylindrical body 16a on one end 7a of the honeycomb structure 3 It may be.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to a following example.

(Reference Example 1)
In this reference example, a tubular honeycomb structure having a partition wall made of a porous body and having a plurality of cells partitioned and formed as fluid flow paths by the partition wall was prepared as the honeycomb structure to be used. This honeycomb structure is made of cordierite and has a circular cylindrical shape with an end face shape of 250 mmφ, a cell shape is square, a partition wall thickness is 0.3 mm (12 mil), and a cell density is 46.5 cells / cm. ² (300 cells / square inch). There are 85 cells on the diagonal of the end face of the honeycomb structure. In addition, 1 mil is 1/1000 inch and is about 0.025 mm.

  The above honeycomb structure is formed by extruding a clay adjusted to an appropriate viscosity using a die having the above cell shape, partition wall thickness, and cell density, and after drying, both end surfaces are cut into smooth surfaces. Manufactured by.

  In such a honeycomb structure, a plugging and filling jig made of a cylindrical body made of candy rubber having a thickness of 8 mm is provided so as to cover the outer peripheral side of one end portion on the side where the plugging cells are open. One end of the honeycomb structure in which the tip end portion is arranged so as to protrude from the end face of one end portion, the end face on one end side is partitioned from the outer peripheral space, and the plugging and filling jig is provided. The ceramic slurry was introduced into the plugged cell by pressing the end of the ceramic slurry onto the ceramic slurry. In this reference example, the target depth of the ceramic slurry introduced into each plugged cell was 5 mm.

  After the ceramic slurry is introduced into the plugged cells in this way, the depth of the ceramic slurry introduced to each plugged cell (hereinafter referred to as “plugged depth”) is set to 85 on the diagonal of the end face. The cell was measured. Here, FIG. 13 is a graph showing each plugging depth in 85 cells on the diagonal of the end face. In FIG. 13, the vertical axis represents the plugging depth (mm), and the horizontal axis represents the position of 85 cells on the diagonal of the end face. Table 1 shows plugging depths (mm) in 10 cells on each outer peripheral side (that is, cell positions 1 to 10 and cell positions 76 to 85 in FIG. 13).

(Comparative Example 1)
The ceramic slurry was introduced into the plugged cells by pressing against the ceramic slurry as it was without disposing the plugging filling jig in the same honeycomb structure as in Reference Example 1. After introducing the ceramic slurry into the plugged cells in this way, each plugged depth was measured for 85 cells on the diagonal of the end face. Here, FIG. 14 is a graph showing each plugging depth in 85 cells on the diagonal of the end face. In FIG. 14, the vertical axis represents the plugging depth (mm), and the horizontal axis represents the position of 85 cells on the diagonal of the end face. Table 1 shows plugging depths (mm) in 10 cells on each outer peripheral side (that is, cell positions 1 to 10 and cell positions 76 to 85 in FIG. 14).

  As shown in FIGS. 13 and 14 and Table 1, the plugged honeycomb structure obtained in Comparative Example 1 had a reduced plugging depth of 10 cells on each outer peripheral side. In the plugged honeycomb structure obtained by the above, no decrease in the plugging depth of 10 cells on the outer peripheral side was confirmed. In Reference Example 1, the reason that the plugging depth on the outer peripheral side was slightly deeper was that the ceramic slurry pushed away by the thickness of the plugging filling jig was introduced into the plugging cell on the outer peripheral side. it is conceivable that.

Example 1
In this example, a tubular honeycomb structure having a partition wall made of a porous body and having a plurality of cells partitioned and formed as fluid flow paths by the partition wall was prepared as the honeycomb structure to be used. This honeycomb structure is made of cordierite and has a circular cylindrical shape with an end surface of 210 mmφ, a cell shape of a square, a partition wall thickness of 0.3 mm (12 mil), and a cell density of 46.5 cells / cm. ² (300 cells / square inch). There are 70 cells on the diagonal of the end face of the honeycomb structure.

  The above honeycomb structure is formed by extruding a clay adjusted to an appropriate viscosity using a die having the above cell shape, partition wall thickness, and cell density, and after drying, both end surfaces are cut into smooth surfaces. Manufactured by.

  In such a honeycomb structure, a plugging filling jig made of a cylindrical body made of candy rubber having a thickness of 4 mm is provided so as to cover the outer peripheral side of one end portion on the side where the plugging cells are open. In addition, a plugging and filling jig is disposed so that the tip end portion is substantially in the same position as the end face of one end portion, and the outer diameter on one end portion side of the honeycomb structure is increased. The ceramic slurry was introduced into the plugged cell by pressing one end of the honeycomb structure provided with the stop-filling jig against the ceramic slurry. In this example, the target depth of the ceramic slurry introduced into each plugged cell was 10 mm.

  After introducing the ceramic slurry into the plugged cells in this way, each plugged depth was measured for 70 cells on the diagonal of the end face. Here, FIG. 15 is a graph showing each plugging depth in 70 cells on the diagonal of the end face. In FIG. 15, the vertical axis indicates the plugging depth (mm), and the horizontal axis indicates the position of 70 cells on the diagonal of the end face. Table 2 shows plugging depths (mm) in 10 cells on each outer peripheral side (that is, cell positions 1 to 10 and cell positions 61 to 70 in FIG. 15).

(Example 2)
A plugging and filling jig made of an American rubber cylindrical body having a thickness of 8 mm is disposed on the honeycomb structure similar to that in Example 1, and ceramics is formed inside the plugging cell in the same manner as in Example 1. Introduced rally. After introducing the ceramic slurry into the plugged cells in this way, each plugged depth was measured for 70 cells on the diagonal of the end face. Here, FIG. 16 is a graph showing each plugging depth in 70 cells on the diagonal of the end face. In FIG. 16, the vertical axis represents the plugging depth (mm), and the horizontal axis represents the position of 70 cells on the diagonal of the end face. Table 2 shows plugging depths (mm) in 10 cells on each outer peripheral side (that is, cell positions 1 to 10 and cell positions 61 to 70 in FIG. 16).

(Comparative Example 2)
The ceramic slurry was introduced into the plugged cells by pressing against the ceramic slurry as it was without disposing the plugging filling jig in the same honeycomb structure as in Example 1. After introducing the ceramic slurry into the plugged cells in this way, each plugged depth was measured for 70 cells on the diagonal of the end face. Here, FIG. 17 is a graph showing each plugging depth in 70 cells on the diagonal of the end face. In FIG. 17, the vertical axis represents the plugging depth (mm), and the horizontal axis represents the position of 70 cells on the diagonal of the end face. Table 2 shows plugging depths (mm) in 10 cells on each outer peripheral side (that is, cell positions 1 to 10 and cell positions 61 to 70 in FIG. 17).

  As shown in FIG. 15, FIG. 16, FIG. 17 and Table 2, the plugged honeycomb structure obtained by Comparative Example 2 had a reduced plugging depth of 10 cells on each outer peripheral side. In the plugged honeycomb structure obtained by Example 1, the decrease in the plugging depth of 10 cells on each outer peripheral side was reduced, and the plugged honeycomb structure obtained by Example 2 was Almost no decrease in the plugging depth of 10 cells on each outer peripheral side was confirmed, and very good results could be obtained.

  The method for manufacturing a plugged honeycomb structure of the present invention is suitably used as a filter for collecting and purifying particulates contained in exhaust gas discharged from an internal combustion engine such as a diesel engine or various combustion devices. It can utilize as a method of manufacturing the plugged honeycomb structure obtained. In particular, the method for manufacturing a plugged honeycomb structure of the present invention can manufacture a plugged honeycomb structure having a uniform plugging depth.

  Moreover, the plugging and filling jig of the present invention can be suitably used in the method for manufacturing a plugged honeycomb structure of the present invention.

1: plugged honeycomb structure, 2: partition wall, 3: honeycomb structure, 4: cell, 4a: plugged cell, 4b: cell other than plugged cell, 5: plugged portion, 6: plugged Sealing jig, 6a: cylindrical body, 6b: strip, 6c: holding part, 7a: one end part, 7b: the other end part, 8: plugging part forming mask, 9: ceramic slurry 10: flat plate member, 16: plugging filling jig, 16a: cylindrical body, 16c: holding portion, 21: honeycomb structure, 22: partition walls, 24: cell, 25: mask (forming plugging portion) Mask), 26: plugged portion, 27: container, 28: plugged honeycomb structure, 29: slurry, B: exhaust gas inflow side end surface, C: purified gas outflow side end surface, G1: exhaust gas, G2: purification gas.

Claims (5)

A honeycomb structure having a partition wall made of a porous body, in which a large number of cells serving as fluid flow paths are partitioned and formed, and the opening of any of the cells of the honeycomb structure is plugged. A method for manufacturing a plugged honeycomb structure including a plugged portion,
Covering the outer peripheral side of one end of the honeycomb structure to be plugged cells (plugged cells) and having the tip end substantially the same as the end face of the one end Disposing the plugging and filling jig so as to be in position, increasing the outer diameter of the one end side of the honeycomb structure,
A container having ceramic slurry or a bottom surface and a side surface on which the one end portion of the honeycomb structure in which the plugging and filling jig is disposed and the plugging and filling jig are mounted on a flat plate member. A step of forming the plugged portion by introducing the ceramic slurry into the plugged cell by pressing the ceramic slurry stored in the plugged cell ,
An elastic cylindrical body is used as the plugging and filling jig, and the plugging and filling jig is arranged on the one end side of the honeycomb structure by the elastic force of the plugging and filling jig. A method for manufacturing a plugged honeycomb structure to be provided .   By disposing the plugging filling jig at the one end, the outer diameter on the one end side of the honeycomb structure is set to a plug for introducing the ceramic slurry into the plugging cell. The method for manufacturing a plugged honeycomb structure according to claim 1, wherein a length of two-thirds or more of the stop depth is increased.   3. The plugging filling jig is disposed after disposing a plugging portion forming mask in which holes capable of communicating with the plugging cells are disposed in the honeycomb structure. The manufacturing method of the plugged honeycomb structure as described.   4. The plugged honeycomb structure according to claim 1, wherein an unfired honeycomb dried body is used as the honeycomb structure, and the plugged cells are filled with the ceramic slurry and then dried and fired to obtain the plugged honeycomb structure. A method for producing a plugged honeycomb structure according to claim 1. The honeycomb structure is disposed at one end portion on the side where the cells to be plugged (plugged cells) are opened to increase the outer diameter of the one end portion side of the honeycomb structure. Pressing the one end of the honeycomb structure having the increased outer diameter against the ceramic slurry placed on a flat plate member or the ceramic slurry stored inside a container having a bottom surface and side surfaces. By the plugging filling jig used for introducing the ceramic slurry into the plugged cell,
Has an inner diameter corresponding to the size of the outer periphery of the honeycomb structure in which the plugging cells are formed, the thickness of which can increase the outside diameter of the one end side of the honeycomb structure, the elastic And is disposed on the one end side of the honeycomb structure so that the honeycomb structure is in close contact with the radial direction of the honeycomb structure by the elastic force of the honeycomb structure. A plugging and filling jig that can be installed and fixed on the one end side.

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