CN1836866A

CN1836866A - Method for manufacturing plugged honeycomb structure

Info

Publication number: CN1836866A
Application number: CN 200610065487
Authority: CN
Inventors: 波多野达彦; 增田政广; 市川结辉人
Original assignee: NGK Insulators Ltd
Current assignee: NGK Insulators Ltd
Priority date: 2005-03-23
Filing date: 2006-03-22
Publication date: 2006-09-27
Anticipated expiration: 2026-03-22
Also published as: CN100509111C

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.

Description

The manufacture method of the honeycomb structured body of plugging hole

Technical field

The present invention relates to the manufacture method of the honeycomb structured body of plugging hole, more particularly, the present invention relates to can be simply and be manufactured on the manufacture method that can reduce the honeycomb structured body of the sedimental plugging hole that deposits on its end face when being used for filter etc. at low cost.

Background technology

In recent years, in various fields such as chemistry, electric power, iron and steel, industrial waste processing, as the environmental cure that prevents public hazards etc., by reclaiming the control of dust filter that uses in the purposes such as goods in the high-temperature gas, the honeycomb structured body of the plugging hole that use is made of hear resistance, pottery that corrosion resistance is good.The honeycomb structured body of such plugging hole, the control of dust that black diesel smoke catalyst filter (DPF:Diesel Particulate Filter) that for example can be used for collecting the particulate matter (Particulate) of discharging from diesel engine etc. uses high temperature, corrosive gas atmosphere is with filter (for example the spy opens the 2001-300922 communique).

The honeycomb structured body of the plugging hole that uses with filter as above-mentioned control of dust, as shown in figure 17, have the honeycomb structured body 23 of tubular and the parts 26 of plugging hole, wherein, tubular honeycomb structured body 23 has the next door 22 of porous matter, form a plurality of holes 24 as fluid flowing path at interval by next door 22, the parts 26 of plugging hole are the peristome shutoff of an end in specific hole, also the peristome of the other end in remaining hole are blocked simultaneously.In the honeycomb structured body 21 of plugging hole shown in Figure 17, the parts 26 of plugging hole block the entrance side end face B and the outlet side end face C in a plurality of holes 24 alternately.

The ceramic structure 21 of plugging hole that uses this structure is during as DPF etc., if with processed gas G1 from the end face B entrance hole 24 of entrance side, dust and particulate matter are trapped on the next door 22, on the other hand, seeing through the gas G2 of processing that porous matter next door 22 flows into the hole 24 of adjacency discharges from the end face C of outlet side, therefore, the gas G2 after the processing that can obtain the dust among the processed gas G1, particulate matter are separated.

The honeycomb structured body 21 of above-mentioned plugging hole can be by the following stated manufacturing, promptly, pass through extrusion molding, obtain having formation at interval as the honeycomb structured body that do not burn till cylindraceous in the porous matter next door in a plurality of holes of fluid flowing path, peristome at the other end in the peristome of the end in the specific hole of not burning till honeycomb structured body or this is not burnt till honeycomb structured body the honeycomb structured body after burning till of gained and all the other holes, the sealing of hole slurry that filling contains pottery burns till then.

But, when adopting the honeycomb structured body of the such plugging hole of in the past manufacture method manufacturing, as shown in figure 18, on the end face of the sealing of hole parts 26 of the end face side of the honeycomb structured body 21 of plugging hole, form the recess 25 that caves in to the inside from the end face of honeycomb structured body 23.Generally speaking, form such recess 25 and be considered to defective, for example, with the honeycomb structured body 21 of such plugging hole during as filters such as DPF, fill up deposits (particulate material) such as coal ash on this recess 25, therefore be core with this conglomerate easily, on the end face of the honeycomb structured body 21 of plugging hole, form deposit.

In addition, though do not illustrate among the figure, but formed the honeycomb structured body of the plugging hole of recess on the end face for such sealing of hole parts, people have taked to fill once more the sealing of hole slurry and have made the countermeasure of end face planarization of sealing of hole parts, but manufacturing process becomes very complicated, and production cost raises, and the sealing of hole parts do not form one, because the sealing of hole parts that are filled in the recess after the thermal stress effect makes peel off, on these positions, produce problems such as breakage.

The invention provides the manufacture method of hole sealing honeycomb structured body, can easy and low-cost manufacturing reduce the honeycomb structured body of the plugging hole of the sedimental deposition on its end face during as filter.

Summary of the invention

The invention provides the honeycomb structured body manufacture method of plugging hole described below and the honeycomb structured body of plugging hole.

(1) manufacture method of the honeycomb structured body of plugging hole (below be sometimes referred to as " first invention "), with ceramics forming raw material extrusion molding, the tubular that obtains having porous matter next door does not burn till honeycomb structured body, described porous matter next door forms a plurality of holes as fluid flowing path at interval, above-mentionedly do not burn till honeycomb structured body or do not burn till that honeycomb structured body burns till and in the peristome of the other end in the peristome of the end in the specific hole of the honeycomb structured body that obtains and all the other holes resulting above-mentioned, filling contains the sealing of hole slurry of pottery, obtain the honeycomb precursor of plugging hole, the honeycomb precursor of resulting above-mentioned plugging hole is burnt till, thereby obtain the honeycomb structured body of plugging hole, it is characterized in that:

When in the peristome of the end in described described specific hole of not burning till honeycomb structured body or described honeycomb structured body, filling described sealing of hole slurry at least, on a described end end face that does not burn till honeycomb structured body or described honeycomb structured body, the masking layer of the peristome that covers the hole beyond the described specific hole is set, obtain having the honeycomb structured body of masking layer, simultaneously, described the described sealing of hole slurry of going up the mounting ormal weight of described below end face packaged unit, with the above-mentioned end end face side pressure of the described honeycomb structured body that has a masking layer described to the described end face packaged unit of the described sealing of hole slurry of mounting, in the described specific hole of a described end end face side, fill described sealing of hole slurry, and, under the state of a described end end face side of the described face of described end face packaged unit being pressed to the described honeycomb structured body that has a masking layer, to the described sealing of hole slurry drying of major general, obtain the honeycomb precursor of described plugging hole with described position that contacts of described end face packaged unit.Wherein, end face packaged unit recited above has the face of prescribed level, when in the above-mentioned peristome in described specific hole, filling described sealing of hole slurry, make described to contact, to limit moving of described sealing of hole slurry in the described particular bore with an above-mentioned described end end face that has the honeycomb structured body of masking layer.

(2) manufacture method of the honeycomb structured body of plugging hole (below be sometimes referred to as " second invention "), with ceramics forming raw material extrusion molding, obtain having porous matter next door tubular do not burn till honeycomb structured body, described porous matter next door forms a plurality of holes as fluid flowing path at interval, do not burn till honeycomb structured body or do not burn till that honeycomb structured body burns till and in the peristome of the other end in the peristome of the end in the specific hole of the honeycomb structured body that obtains and all the other holes gained above-mentioned described, filling contains the sealing of hole slurry of pottery, obtain the honeycomb precursor of plugging hole, burn till the honeycomb precursor of resulting described plugging hole, thereby obtain the honeycomb structured body of plugging hole, it is characterized in that:

When in the peristome of the end in described described specific hole of not burning till honeycomb structured body or described honeycomb structured body, filling described sealing of hole slurry at least, on a described end end face that does not burn till honeycomb structured body or described honeycomb structured body, the masking layer of the peristome that covers the hole beyond the described specific hole is set, obtain having the honeycomb structured body of masking layer, after in the described specific hole of the described end end face side of the resulting honeycomb structured body that has a masking layer, filling described sealing of hole slurry, under the state of a described end end face side of the described face of end face packaged unit described below being pressed to the described honeycomb structured body that has a masking layer, to the described sealing of hole slurry drying of major general, obtain the honeycomb precursor of described plugging hole with described position that contacts of described end face packaged unit.Wherein, end face packaged unit recited above has the face of prescribed level, contacts with a described described end end face that has the honeycomb structured body of masking layer by making described, limits moving of described sealing of hole slurry in the described specific hole.

(3) manufacture method of the honeycomb structured body of the plugging hole of being put down in writing according to above-mentioned (1) or (2), wherein, with the described sealing of hole slurry drying at described position that contacts of described end face packaged unit after, described end face packaged unit is removed from the honeycomb precursor of described plugging hole.

(4) manufacture method of the honeycomb structured body of the plugging hole of being put down in writing according to above-mentioned (1) or (2) wherein, is used the described end face packaged unit that is made of inflammable substance, when burning till the honeycomb precursor of described plugging hole, described end face packaged unit is disappeared.

(5) manufacture method of the honeycomb structured body of the plugging hole of being put down in writing according to above-mentioned (4), wherein, when burning till the honeycomb precursor of described plugging hole, the described masking layer of the peristome that covers the hole beyond the described specific hole is disappeared with described end face packaged unit.

(6) according to the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing in above-mentioned (1)～(5), wherein, described end face packaged unit be have flexible tabular.

(7) according to the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing in above-mentioned (1)～(6), wherein, described end face packaged unit is the top unlimited tubular that has the bottom.

(8) according to the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing in above-mentioned (1)～(7), wherein, described sealing of hole slurry contains the pore-creating material.

(9) according to the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing in above-mentioned (1)～(8), wherein, the viscosity of described sealing of hole slurry is 100～1500dPas.

(10) honeycomb structured body of plugging hole (below be sometimes referred to as " the 3rd invention "), this honeycomb structured body has the parts of honeycomb structured body cylindraceous and plugging hole, described honeycomb structured body cylindraceous has the next door of porous matter, these next doors form a plurality of holes as fluid flowing path at interval, the parts of described plugging hole are with the peristome sealing of an end in specific hole, simultaneously also with the peristome sealing of the other end in remaining hole, it is characterized in that, the parts of the described plugging hole of the peristome in each described hole of shutoff are integrated formations, simultaneously, at least one end face side at described honeycomb structured body, the end face of the parts of described plugging hole is smooth, perhaps, though form the recess that caves in to the inside from an end end face of described honeycomb structured body on the end face of the parts of described plugging hole, the above-mentioned concave depth of the parts of described plugging hole is smaller or equal to 1mm.

(11) honeycomb structured body of the plugging hole of being put down in writing according to (10), wherein, other end end face side at described honeycomb structured body, the end face of the parts of described plugging hole also is smooth, perhaps, form the recess that caves in to the inside from the end face of the other end of described honeycomb structured body on the end face of the parts of described plugging hole, the above-mentioned concave depth of the parts of described plugging hole is smaller or equal to 1mm.

Like this, according to the manufacture method of the honeycomb structured body of plugging hole of the present invention, reduce the honeycomb structured body of the sedimental plugging hole that deposits on its end face when can easy and low-cost manufacturing being used for filter.In addition, the honeycomb structured body of plugging hole of the present invention can reduce the sedimental deposition on its end face.

Description of drawings

Fig. 1 is the oblique view of the honeycomb structured body of the plugging hole made of the embodiment of manufacture method of the honeycomb structured body of the expression plugging hole that adopts the present invention's (first invention).

The sectional drawing of an example of the section that Fig. 2 is a honeycomb structured body that expression will plugging hole shown in Figure 1 after the plane A cut-out that comprises central shaft.

The sectional drawing of another example of the section that Fig. 3 is a honeycomb structured body that expression will plugging hole shown in Figure 1 after the plane A cut-out that comprises central shaft.

Fig. 4 is the oblique view that does not burn till honeycomb structured body in expression the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole.

Fig. 5 is the oblique view of the honeycomb precursor of the plugging hole in expression the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole.

Fig. 6 is the oblique view of the honeycomb structured body of the plugging hole in expression the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole.

Fig. 7 is the sectional drawing of the honeycomb structured body that has masking layer in expression the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole, shows the section identical with Fig. 2.

Fig. 8 is the oblique view that schematically illustrates the operation of the filling sealing of hole slurry in the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole.

Fig. 9 is in the embodiment that schematically illustrates the manufacture method of the ceramic structure of the present invention's (first invention) plugging hole, utilize the sectional drawing of the honeycomb structured body that has masking layer that the end face packaged unit filled the sealing of hole slurry section when the plane that comprises central shaft cuts off.

Figure 10 is the oblique view that schematically illustrates the operation of dry sealing of hole slurry in the present invention's (first invention) the embodiment of manufacture method of ceramic structure of plugging hole.

Figure 11 is to use tabular end face packaged unit to form the key diagram of the operation of the cylindrical container that has the bottom.

Figure 12 is to use tabular end face packaged unit to form the key diagram of the operation of the cylindrical container that has the bottom.

Figure 13 is to use tabular end face packaged unit to form the key diagram of the operation of the cylindrical container that has the bottom.

Figure 14 is to use tabular end face packaged unit to form the key diagram of the operation of the cylindrical container that has the bottom.

Figure 15 schematically illustrates in the present invention's (second invention) the embodiment of manufacture method of ceramic structure of plugging hole, the end face packaged unit is pressed to the sectional drawing of operation of the honeycomb structured body of the plugging hole that has masking layer of having filled the sealing of hole slurry, show the section identical with Fig. 9.

Figure 16 is honeycomb structured body that expression will the plugging hole shown in Figure 1 sectional drawing along another example of the section of the plane A cut-out that contains central shaft.

Figure 17 is the sectional drawing of structure of representing the honeycomb structured body of plugging hole in the past.

Figure 18 is the sectional drawing of an end end face side of representing the honeycomb structured body of plugging hole in the past.

Wherein,

1: the honeycomb structured body of plugging hole, 2: honeycomb structured body, 3: plugging part, 4: next door, 5: hole, 5a: specific hole, 5b: remaining hole, 6a: the peristome of an end, 6b: the peristome of the other end, 7a: the end face of an end, 7b: the end face of the other end, 8: recess, 9: end face packaged unit, 10: face, 11: the honeycomb structured body of plugging hole, 12: the honeycomb structured body that does not burn till, 13: sealing of hole slurry, 14: next door, 15: the hole, 15a: specific hole, 15b: remaining hole, 15c: the hole beyond the specific hole, 16a: the peristome of an end, 16b: the peristome of the other end, 17a: the end face of an end, the end face of the 17b other end, 18: the honeycomb precursor of plugging hole, 19: masking layer, 20: have the honeycomb structured body of masking layer, 21: the honeycomb structured body of plugging hole, 22: the next door, 23: honeycomb structured body, 24: hole, 25: recess, 26: the parts of plugging hole, 27: hot plate, 31: staving, 32: pedestal, 33: the end face packaged unit, 34: lid, 35: space, 36: attract mouth, A: the plane that comprises central shaft, G1: processed gas, G2: the gas of handling.

The specific embodiment

Below, with reference to accompanying drawing, embodiment to the honeycomb structured body of the manufacture method of the honeycomb structured body of the present invention's (first to the 3rd invention) plugging hole and plugging hole is elaborated, but the present invention is not limited to these embodiments, also is included in various changes, correction, the improvement carried out based on those skilled in the art's knowledge in the limit that does not break away from the scope of the invention.

At first, an embodiment to the manufacture method of the honeycomb structured body of the present invention's (first invention) plugging hole describes.Fig. 1 is the oblique view that schematically illustrates the honeycomb structured body of the plugging hole that the embodiment of manufacture method of the honeycomb structured body of the plugging hole that adopts the present invention's (first invention) makes.Fig. 2 is the sectional drawing of an example of the section after honeycomb structured body that expression will plugging hole shown in Figure 1 cuts off along the plane A that comprises central shaft, and Fig. 3 is expression with the sectional drawing of another example of the honeycomb structured body of plugging hole shown in Figure 1 section after the plane A cut-out that comprises central shaft.The manufacture method of the honeycomb structured body of the plugging hole of present embodiment, it is the method for making the honeycomb structured body 1 of plugging hole as shown in Figure 1, the honeycomb structured body 1 of described plugging hole has the parts 3 of honeycomb structured body 2 cylindraceous and plugging hole, wherein, described honeycomb structured body 2 has the next door 4 of porous matter, this next door 4 forms a plurality of holes 5 as fluid flowing path at interval, the parts 3 of described plugging hole are with the peristome 6a shutoff of the end of specific hole 5a, simultaneously, also with the peristome 6b shutoff of the other end of remaining hole 5b.Particularly, the manufacture method of the honeycomb structured body of the plugging hole of present embodiment is suitable for making the honeycomb structured body 1 of plugging hole described below, promptly, end face side at least one end of honeycomb structured body 2, as shown in Figure 2, the end face of the parts 3 of plugging hole is smooth, perhaps, as shown in Figure 3, form the recess 8 that caves in to the inside from the end face 7a of an end of honeycomb structured body 2 on the end face of the parts 3 of plugging hole, but the degree of depth of recess 8 is smaller or equal to 1mm, like this, when the honeycomb structured body with resulting plugging hole is used for filter etc., can reduce the sedimental deposition on its end face.

The manufacture method of the honeycomb structured body of the plugging hole of present embodiment, be the manufacture method of the honeycomb structured body of plugging hole as described below: as shown in Figure 4, with ceramics forming raw material extrusion molding, obtain having forming at interval and do not burn till honeycomb structured body 12 as the tubular in the porous matter next door 14 in a plurality of holes 15 of fluid flowing path, as shown in Figure 5, gained do not burn till honeycomb structured body 12 or will not burn till the peristome 16a of an end of specific hole 15a of the honeycomb structured body (not shown) that honeycomb structured body 12 is fired into and the peristome 16b of the other end of remaining hole 15b in, filling contains the sealing of hole slurry 13 of pottery, obtain the honeycomb precursor 18 of plugging hole, as shown in Figure 6, the honeycomb precursor 18 of gained plugging hole is burnt till, thereby obtain the honeycomb structured body 11 of plugging hole, wherein, as shown in Figure 5, when in the peristome 16a of the end of the specific hole 15a of honeycomb structured body 12 that does not burn till or honeycomb structured body (not shown), filling sealing of hole slurry 13 at least, as shown in Figure 7, on the end face 17a of an end of honeycomb structured body 12 that does not burn till or honeycomb structured body (not shown), the masking layer 19 of the peristome that covers specific hole 15a hole 15c (being remaining hole 15b) in addition is set, obtain having the honeycomb structured body 20 of masking layer, simultaneously, as Fig. 8 and shown in Figure 9, on the face 10 of described below end face packaged unit 9, the sealing of hole slurry 13 of mounting ormal weight, the end face 17a side pressure of one end of honeycomb structured body 20 that will have masking layer is to the face 10 of the end face packaged unit 9 of mounting sealing of hole slurry 13, at one end fill sealing of hole slurry 13 among the specific hole 15a of end face 17a side, and, as shown in figure 10, under the state of an end end face 17a side of the face 10 of end face packaged unit 9 being pressed to the honeycomb structured body 20 that has masking layer, sealing of hole slurry 13 (with reference to Fig. 9) drying to the position that the major general contacts with the face 10 of end face packaged unit 9, obtain the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole, wherein, end face packaged unit 9 recited above has the face 10 of specific size, when in the peristome of specific hole 15a, filling sealing of hole slurry 13, make this face 10 and an end end face 17a side contacts that has the honeycomb structured body 20 of masking layer, limit moving of the interior sealing of hole slurry 13 of specific hole 15a.In addition, in the honeycomb structured body 11 of plugging hole shown in Figure 6,, use identical symbolic representation, no longer describe with the identical part of each element structure of the honeycomb structured body 1 of plugging hole shown in Figure 1.Wherein, Fig. 4 is the oblique view that does not burn till honeycomb structured body in the manufacture method of ceramic structure of plugging hole of expression present embodiment; Fig. 5 is the oblique view of the honeycomb precursor of the plugging hole in the manufacture method of ceramic structure of plugging hole of expression present embodiment; Fig. 6 is the oblique view of the honeycomb structured body of the plugging hole in the manufacture method of ceramic structure of plugging hole of expression present embodiment; Fig. 7 is the sectional drawing of the honeycomb structured body that has masking layer in the manufacture method of ceramic structure of plugging hole of expression present embodiment.In addition, the expression section identical among Fig. 7 with Fig. 2.Also have, Fig. 8 schematically illustrates the oblique view of filling the operation of sealing of hole slurry in the manufacture method of ceramic structure of plugging hole of present embodiment; Fig. 9 is the sectional drawing of the section that cuts off along the plane that comprises central shaft of the honeycomb structured body that has masking layer that schematically illustrates in the manufacture method of ceramic structure of plugging hole of present embodiment, will utilize the end face packaged unit to fill the sealing of hole slurry; Figure 10 schematically illustrates in the manufacture method of ceramic structure of plugging hole of present embodiment, with the oblique view of the operation of sealing of hole slurry drying.

By such formation scheme, in dry run during the volume-diminished of sealing of hole slurry 13, the one end end face 17a side of being pushed at the face 10 of end face packaged unit 9, just can not form the recess that caves in to the inside from an end end face 17a, or, even form recess, also can make its degree of depth reach 1mm following (promptly 0～1mm), this is to be difficult to realize with in the past method, as shown in Figure 1, and can be simply and make the honeycomb structured body 1 of the plugging hole that the deposit deposition reduces on the end face at low cost.

The honeycomb structured body of the plugging hole made from the manufacture method of the honeycomb structured body of in the past plugging hole, as shown in figure 18, because the problem on making, on the end face of the parts 26 of plugging hole, form and cave in to the inside, be called shrink defects above the recess 25 of 1mm from an end end face of honeycomb structured body 22.The honeycomb structured body 21 of such plugging hole during as filters such as DPF, is filled up deposits (particulate material) such as coal ash on this recess 25,, on the end face of the honeycomb structured body 21 of plugging hole, deposit deposit easily as core.If on the end face of the honeycomb structured body 21 of plugging hole, deposited deposit like this, not blocked by the peristome in the hole 23 of parts 26 shutoff of plugging hole, the problem that exists the pressure loss to rise.In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, as Fig. 8～shown in Figure 10, with an end end face 17a side pressure of the honeycomb structured body that has masking layer 20 that obtains face 10 to the end face packaged unit 9 of the sealing of hole slurry 13 of mounting ormal weight, at one end fill sealing of hole slurry 13 among the specific hole 15a of end face 17a side, and, under the state of an end end face 17a side of the face 10 of end face packaged unit 9 being pressed to the honeycomb structured body 20 that has masking layer, sealing of hole slurry 13 dryings to the position that the major general contacts with the face 10 of end face packaged unit 9, thereby, end end face 17a side in face 10 extruding that are subjected to end face packaged unit 9, can not form the recess that caves in to the inside from an end end face 17a, perhaps, even formation recess, its degree of depth is reached below the 1mm, and this is to adopt manufacture method in the past unapproachable.

In addition, for example, the honeycomb structured body of the plugging hole made from the manufacture method of the honeycomb structured body of in the past plugging hole, need on the end face of the parts of plugging hole, fill the sealing of hole slurry in the formed recess once more with additive method, make its end face planarization, perhaps, re-use after must cutting certain length from the end face of the honeycomb structured body of plugging hole, but in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, only need to fill a sealing of hole slurry, on at least one end end face side of the honeycomb structured body of the plugging hole of gained, the end face of the parts of plugging hole is smooth, perhaps, even on the end face of the parts of plugging hole, form the recess that caves in to the inside from an end end face of honeycomb structured body, also can make concave depth reach 1mm following (promptly 0～1mm).

Below, according to each procedure, the manufacture method of the honeycomb structured body of the plugging hole of present embodiment is carried out more specific description.

At first, as shown in Figure 4, will contain the shaping raw material extrusion molding of pottery, and obtain having the tubular that forms at interval as the porous matter next door 14 in a plurality of holes 15 of fluid flowing path and do not burn till honeycomb structured body 12.The shaping raw material that contains pottery can suitably use to add adhesive, decentralized medium etc. carry out material after mixing in the powder of potteries such as cordierite, mullite, aluminium oxide, spinelle, carborundum, silicon nitride, lithium aluminium silicate, aluminium titanates.Method to extrusion molding is not particularly limited, and for example can use the extrusion under vacuum machine to carry out the known method in the past of extrusion molding.

Then, as shown in Figure 7, on an end end face 17a who does not burn till honeycomb structured body 12 or will not burn till honeycomb structured body 12 the honeycomb structured body (not shown) after burning till, the masking layer 19 of the peristome that covers specific hole 15a hole 15c in addition is set, obtains having the honeycomb structured body 20 of masking layer.Wherein, shown in Fig. 7 be, on the honeycomb structured body 12 that does not burn till, be provided with the honeycomb structured body that has masking layer 20 of masking layer 19, but, as mentioned above, also can burn till on the resulting honeycomb structured body (not shown) in back masking layer 19 is set, as the honeycomb structured body 20 that has masking layer at the honeycomb structured body 12 that will not burn till.

Wherein, do not burning till the masking layer 19 that is provided with on the end end face 17a of honeycomb structured body 12 or honeycomb structured body (not shown), be for peristome by the hole 15c beyond the specific hole 15a of covering, thereby only in specific hole 15a, import sealing of hole slurry 13, thereby the masking layer that uses can use the honeycomb structured body of manufacturing plugging hole in the past aptly the time.Specifically, for example can not enumerate burning till on the end end face 17a of honeycomb structured body 12 or honeycomb structured body (not shown) and paste bonding sheet, handle the masking layer 19 that perforate forms on the privileged site corresponding with specific hole 15a by image.

Then, as Fig. 8 and shown in Figure 9, at first, and on the face 10 of described below end face packaged unit 9, the sealing of hole slurry 13 of mounting specified quantitative.Described end face packaged unit 9 has the face 10 of specific size, when in the peristome of specific hole 15a, filling sealing of hole slurry 13, make this face 10 and an end end face 17a side contacts that has the honeycomb structured body 20 of masking layer, limit moving of the interior sealing of hole slurry 13 of specific hole 15a.

Then,, press to the face 10 of end face packaged unit 9 of the sealing of hole slurry 13 of mounting specified quantitative, at one end fill sealing of hole slurry 13 in the specific hole 15a of end face 17a side an end end face 17a side of the honeycomb structured body that has masking layer 20 of gained.

Above-mentioned end face packaged unit 9, the sealing of hole slurry 13 of mounting specified quantitative on its face 10, it plays the effect that this sealing of hole slurry 13 is filled into the container among the specific hole 15a, simultaneously, when drying, will not burn till the end end face 17a sealing of honeycomb structured body 12 or honeycomb structured body (not shown), limit moving of the interior sealing of hole slurry 13 of specific hole 15a.In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, as end face packaged unit 9, can use flexible plate-shaped member is formed the parts that have with the shape corresponding concave part of an end end face 17a who does not burn till honeycomb structured body 12 or honeycomb structured body (not shown).Specifically, can exemplify aluminium foil, resin film etc. as suitable example.Also have, end face packaged unit 9, as long as can carry the sealing of hole slurry 13 of specified quantitative, this sealing of hole slurry 13 is filled among the specific hole 15a gets final product, in addition without limits, for example also can be have a face (bottom surface) corresponding with an end end face 17a shape of not burning till honeycomb structured body 12 or honeycomb structured body (not shown) the bottom tube-like container arranged.

In addition, such end face packaged unit 9 for example shown in Figure 11～14, also can use the parts that bottom tube-like is arranged that form at the inboard bonding tabular end face packaged unit 9 of tubular staving 31.Herein, Figure 11～Figure 14 is that explanation uses tabular end face packaged unit to be formed with the key diagram of the operation of bottom tube-like container.

Particularly, for example, at first, as shown in figure 11, have in its surface on the pedestal 32 of the bleeding point that can vacuumize, the staving 31 of configuration tubular, on opening portion above this staving 31, setting has flexible tabular end face packaged unit 33 then.Also have, as mentioned above, for the inboard bonding of the staving 31 of tabular end face packaged unit 33 and tubular is formed with the bottom tube-like container, this staving 31 must have the big internal diameter of external diameter of the honeycomb structured body (honeycomb structured body 20 (with reference to Fig. 7) that for example has masking layer) than plugging hole.Also have, in order in the operation that makes afterwards staving 31 inside to be vacuumized, staving 31 should be configured on the pedestal 32 with airtight conditions.

Afterwards, as shown in figure 12, on the tabular end face packaged unit 33 that is provided with on the opening portion above the staving 31, lid 34 is set.This lid 34 is the opening portions that are used for tabular end face packaged unit 33 is remained on staving 31.In addition, when the inside of staving 31 was vacuumized, lid 34 made the both sides of end face packaged unit 33 produce pressure differential.For example, as shown in figure 12, as lid 34, use and end face packaged unit 33 between form the shape lid in space 35, in addition, although omitted diagram, still can enumerate for example perforate on the part of lid, make in inside and outside generation pressure difference method of staving etc.

Then, as shown in figure 13, staving 31 inside are vacuumized, make end face packaged unit 33 bonding with the inner face of staving 31 by this vacuum power by the pump orifice 36 that on pedestal 32, is provided with.

Subsequently, remove lid 34, as shown in figure 14, obtain being configured as the end face packaged unit 33 of staving 31 interior shapes.Such end face packaged unit 33, owing to formed the tubular that the end is arranged, portion's sealing of hole slurry 13 (with reference to Fig. 9) of mounting specified quantitative well within it.

In addition, as end face packaged unit 9 as shown in figure 10, the material that preferably has high pyroconductivity for example is made of copper, aluminium, iron etc., makes to conduct heat easily when sealing of hole slurry 13 dryings.Also have,, also can reduce the thickness of end face packaged unit 9 in order to improve pyroconductivity.

In addition, as end face packaged unit 9, well carry out for the drying that makes sealing of hole slurry 13, preferably have from air-tightness height, water-tolerant, have an at least a characteristic of selecting the hear resistance that can tolerate the temperature when dry, the characteristic that low-thermal-expansion shrinks these.

In addition, the sealing of hole slurry 13 of the specified quantitative of mounting on the face 10 of end face packaged unit 9 should be more than fill needed amount in specific hole 15a.Also have, be not particularly limited for the size of the face 10 of end face packaged unit 9, can greater than, also can be less than an end end face 17a of the honeycomb structured body 20 that has masking layer.

For employed sealing of hole slurry 13 in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, be not particularly limited, can use aptly for example to add adhesive, decentralized medium etc. in the cordierite powder at ceramic powders and carry out material after mixing.Kind for ceramic powders is not particularly limited, for example can use with the above-mentioned ceramic powders identical materials that is comprised in the shaping raw material of honeycomb structured body 12 extrusion moldings of not burning till, also can be different materials.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, sealing of hole slurry 13 preferably contains the pore-creating material.By containing the pore-creating material, can suppress with sealing of hole slurry 13 to produce when dry shrink defects (on the end face of the parts of plugging hole, forming the defective of recess).In addition, kind for the pore-creating material is not particularly limited, and can exemplify Foamex, graphite, wheat flour, starch, phenolic resins, polymethyl methacrylate, polyethylene, PETG, Xi Lasi ball (shirasu balloon), flying dust ball (fly-ash balloon) etc.

Form the reason of recess on the end face of the parts of the plugging hole of the honeycomb structured body of the plugging hole that obtains with in the past manufacture method, can enumerate in drying, firing process, the moisture that is comprised in the sealing of hole slurry is caused the volume of sealing of hole slurry material to reduce by honeycomb structured body fast Absorption or evaporation.As mentioned above, by add the pore-creating material in the sealing of hole slurry, suppressed moisture by the honeycomb bulk absorption, the volume that can reduce the sealing of hole slurry reduces, and can make on the end face of parts of plugging hole more smooth.In addition, because the parts of plugging hole are porous plastids, can make the honeycomb structured body of the plugging hole that the pressure loss alleviates.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, the viscosity of sealing of hole slurry 13 is preferably 100～1500dPaS.Like this, the generation of shrink defects can be suppressed during with sealing of hole slurry 13 dryings, simultaneously, the mechanical strength of the parts 3 (with reference to Fig. 1) of resulting plugging hole can be improved.In addition, if the not enough 100dPaS of the viscosity of sealing of hole slurry 13 than being easier to form shrink defects, thereby is undesirable.Otherwise,, be difficult to sealing of hole slurry 13 is filled among the specific hole 15a, thereby also be undesirable if the viscosity of sealing of hole slurry 13 surpasses 1500dPaS.

Next, as Fig. 9 and shown in Figure 10, under the state of an end end face 17a side of the face 10 of end face packaged unit 9 being pressed to the honeycomb structured body 20 that has masking layer, to sealing of hole slurry 13 dryings at the position that the major general contacts with the face 10 of end face packaged unit 9.Wherein, said " to sealing of hole slurry 13 dryings at the position that the major general contacts with the face 10 of end face packaged unit 9 " are meant, at least a portion gasification of the solvent that is contained in the sealing of hole slurry 13 at the feasible position that contacts with the face 10 of end face packaged unit 9, and the flowability of the sealing of hole slurry 13 at the position that contacts with the face 10 of end face packaged unit 9 is reduced.By such drying, in the feasible drying and firing process afterwards, the sealing of hole slurry 13 at the position that contacts with the face 10 of end face packaged unit 9 solidifies the degree that its shape does not change that reaches.

In manufacture method in the past, be provided with the honeycomb structured body that has masking layer of masking layer on the end end face with the honeycomb structured body that do not burn till or honeycomb structured body, press in the container that holds a large amount of sealing of hole slurry, after in this has the peristome in specific hole of honeycomb structured body of plugging hole of masking layer, filling the sealing of hole slurry, this honeycomb structured body that has the plugging hole of masking layer has been filled in the peristome in specific hole under the state of sealing of hole slurry and directly taken out from container.Like this, because the effect from outside and/or inner stress etc. of surface tension, molecular separating force etc., in the peristome in specific hole, filled on the end face of sealing of hole slurry and produced shrink defects.In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, under the state of end end face 17a side extruding, carry out drying at face 10 with end face packaged unit 9, on the end face of sealing of hole slurry 13, produce vacuum power, can alleviate above-mentioned from outside and/or inner stress.Therefore, can prevent effectively be filled in sealing of hole slurry 13, with end face that the face 10 of end face packaged unit 9 contacts on produce shrink defects.

Also have, in manufacture method in the past, as mentioned above, carry out the filling of sealing of hole slurry owing to deposit a large amount of sealing of hole slurry in container, after filling, the interior residual sealing of hole slurry that has of container needs spended time and manpower to remove washed container.In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, mounting is filled the sealing of hole slurry 13 of needed abundant amount on the face 10 of end face packaged unit 9, just can carry out the filling of sealing of hole slurry 13, therefore the residual quantity of sealing of hole slurry 13 reduces, the sealing of hole slurry 13 of mounting is used up fully on perhaps can face 10, can alleviate container and clean required time and manpower.

Drying means for sealing of hole slurry 13 is not particularly limited, for example can enumerate, to be provided with the honeycomb structured body that has masking layer 20 of end face packaged unit 9, carry out dry method on electric hot plate 27 grades, blow hot blast and carry out dry heated-air drying etc. being placed under the state under the one end-face 17a side direction.In addition, when using Wrapping films (wrap film), also can use microwave drying as end face packaged unit 9.In addition, when using aluminium foil, Copper Foil etc., can switch on by opposite end face closure parts 9, make end face packaged unit 9 self-heatings, utilize this heat to come dry sealing of hole slurry 13 as end face packaged unit 9.

Afterwards, omit among the figure,, the sealing of hole slurry is filled in the peristome of other end in remaining hole, carry out drying, make the honeycomb precursor 18 (with reference to Fig. 5) of plugging hole for the other end of not burning till honeycomb structured body or honeycomb structured body.In addition, in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, for in the peristome of the other end in remaining hole, filling the sealing of hole slurry, carrying out dry method and be not particularly limited, can adopt the same method of the specific hole 15a shown in Fig. 7～9 to fill the sealing of hole slurry, carry out drying, also can use in the past known method to fill the sealing of hole slurry.

Next, as shown in Figure 6, the honeycomb precursor 18 of the plugging hole of gained is burnt till, obtain the honeycomb structured body 11 of plugging hole.Method for the honeycomb precursor 18 that burns till plugging hole is not particularly limited, and can carry out according to the firing process in the manufacture method of the honeycomb structured body of known plugging hole in the past.Adopt the manufacture method of the honeycomb structured body of such plugging hole, can be easy and make the honeycomb structured body of plugging hole as shown in Figure 1 at low cost, when the honeycomb structured body of this plugging hole is used for filter, can reduce deposit in its end face deposition.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, as Fig. 9 and shown in Figure 10, after sealing of hole slurry 13 dryings at the position that will contact, can remove this end face packaged unit 9 (with reference to Fig. 6) from the honeycomb precursor 18 of plugging hole with the face 10 of end face packaged unit 9.By above-mentioned drying, in afterwards the drying and firing process, the sealing of hole slurry 13 at the position that contacts with the face 10 of end face packaged unit 9 no longer deforms, and therefore, also can not produce shrink defects etc. even at this moment remove end face packaged unit 9.In addition, also can remove the masking layer 19 (with reference to Fig. 7) that is provided with on the end end face of honeycomb structured body or honeycomb structured body not burning till this moment simultaneously.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, as the end face packaged unit 9 shown in Fig. 8～Figure 10, also can use the end face packaged unit 9 that constitutes by inflammable substance, when burning till the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole, end face packaged unit 9 disappears.Like this, do not need to remove end face packaged unit 9, can simplify manufacturing process.Particularly, by burning till the occasion that end face packaged unit 9 is disappeared, as end face packaged unit 9, do not disappear during preferably by drying, inflammable substance indeformable, that disappear when burning till constitutes, can enumerate the end face packaged unit 9 that constitutes by polyvinyl chloride etc. as preferred example.

In addition, in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, when burning till the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole, also can the masking layer 19 (with reference to Fig. 7) of the peristome that covers hole in addition, specific hole be disappeared with end face packaged unit 9.Like this, disappear simultaneously, can omit the operation of removing masking layer 19 (with reference to Fig. 7), further simplify manufacturing process by when burning till, making end face packaged unit 9 and masking layer 19 (with reference to Fig. 7).

In addition, in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment,, also can hold catalyst inner surface and/or its inner carrying in its next door 4 for the honeycomb structured body 1 of plugging hole that obtain as stated above, as shown in Figure 1.For example, the honeycomb structured body of plugging hole is used for the occasion of DPF, the preferred catalyst that carries the effect of holding deposit (particulate material) burning that has promotion and captured by the next door.Such catalyst for example can be enumerated Pt, Pd, the Rh etc. of noble metal system or the perovskite type catalyst of nonmetal system etc.As for carrying the method for holding catalyst, can be undertaken by carrying the method for holding catalyst in the filters such as DPF in the past.

Below, an embodiment of the manufacture method of the honeycomb structured body of the present invention's (second invention) plugging hole is described.The manufacture method of the honeycomb structured body of the plugging hole of present embodiment, same with first invention, it is the method for making the honeycomb structured body 1 of plugging hole as shown in Figure 1, the honeycomb structured body 1 of described plugging hole has the parts 3 of honeycomb structured body 2 cylindraceous and plugging hole, wherein, described honeycomb structured body 2 has the next door 4 of porous matter, this next door 4 forms a plurality of holes 5 as fluid flowing path at interval, the parts 3 of described plugging hole are the peristome 6a shutoff of the end of specific hole 5a, simultaneously with the peristome 6b shutoff of the other end of remaining hole 5b.Particularly, the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, be suitable for making the honeycomb structured body 1 of plugging hole described below, promptly, when the honeycomb structured body of resulting plugging hole is used for filter etc., in order to reduce the sedimental deposition on its end face, end face side at least one end of honeycomb structured body 2, as shown in Figure 2, the end face of the parts 3 of plugging hole is smooth, perhaps, and as shown in Figure 3, though form the recess 8 that caves in to the inside from the end face 7a of an end of honeycomb structured body 2 on the end face of the parts 3 of plugging hole, the degree of depth of recess 8 is smaller or equal to 1mm.

Below, the manufacture method for the honeycomb structured body of the plugging hole of present embodiment describes to operation one by one.The manufacture method of the honeycomb structured body of the plugging hole of present embodiment, be the manufacture method of the honeycomb structured body of plugging hole as described below: as shown in Figure 4, with ceramics forming raw material extrusion molding, obtain having forming at interval and do not burn till honeycomb structured body 12 as the tubular in the porous matter next door 14 in a plurality of holes 15 of fluid flowing path, as shown in Figure 5, not not burning till honeycomb structured body 12 or will not burning till that honeycomb structured body 12 burns till and among the peristome 16b of the other end of the peristome 16a of the end of the specific hole 15a of the honeycomb structured body (not shown) that obtains and remaining hole 15b at gained, filling contains the sealing of hole slurry 13 of pottery, obtain the honeycomb precursor 18 of plugging hole, as shown in Figure 6, the honeycomb precursor 18 of gained plugging hole is burnt till, obtain the honeycomb structured body 11 of plugging hole, wherein, as shown in Figure 5, when in the peristome 16a of the end of the specific hole 15a that does not burn till honeycomb structured body 12 or honeycomb structured body (not shown), filling the parts 13 of plugging hole at least, as shown in Figure 7, on the end face 17a of an end that does not burn till honeycomb structured body 12 or honeycomb structured body (not shown), the masking layer 19 of the peristome that covers specific hole 15a hole 15c (being remaining hole 15b) in addition is set, obtain having the honeycomb structured body 20 of masking layer, as shown in figure 15, in the specific hole 15a of an end end face 17a side of the honeycomb structured body that has masking layer 20 of gained, fill sealing of hole slurry 13, then, under the state of an end end face 17a side of the face 10 of end face packaged unit 9 described below being pressed to the honeycomb structured body 20 that has masking layer, sealing of hole slurry 13 dryings to the position that the major general contacts with the face 10 of end face packaged unit 9, obtain the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole, wherein, end face packaged unit 9 recited above has an end face packaged unit 9 to have the face 10 of specific size, by making this face 10 and an end end face 17a side contacts that has the honeycomb structured body 20 of masking layer, limit the mobile of sealing of hole slurry 13 among the specific hole 15a.In addition, Figure 15 schematically represents in the manufacture method of ceramic structure of plugging hole of present embodiment, the end face packaged unit pressed to the sectional drawing of operation of the honeycomb structured body of the plugging hole that has masking layer of having filled the sealing of hole slurry.

In addition, in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, as Fig. 4 and shown in Figure 7, for the operation before the honeycomb structured body 20 that obtains having masking layer, can carry out according to the method identical with the manufacture method of the honeycomb structured body of the plugging hole of an embodiment of first invention.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, after obtaining the honeycomb structured body that has masking layer 20 shown in Figure 7, adopt known method in the past, after in specific hole 15a (with reference to Figure 15), filling sealing of hole slurry 13, as shown in figure 15, press at the face 10 of the end face packaged unit 9 that the sealing of hole slurry 13 that will be used for limiting specific hole 15a moves under the state of an end end face 17a side of the honeycomb structured body 20 that has masking layer, to sealing of hole slurry 13 dryings at the position that the major general contacts with the face 10 of end face packaged unit 9, thereby obtain the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole.This end face packaged unit 9 can use the end face packaged unit 9 same parts that constitute that use in the manufacture method of honeycomb structured body with the plugging hole of an embodiment of first invention.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, the filling of sealing of hole slurry 13 can adopt in the past known method to carry out, afterwards, utilize moving of sealing of hole slurry 13 among the specific hole 15a of end face packaged unit 9 restriction, prevent to produce shrink defects.Therefore, operation such as the face 10 of end face packaged unit 9 is pressed to the drying after the end end face 17a side of the honeycomb structured body 20 that has masking layer and burn till also can adopt the method identical with the manufacture method of the honeycomb structured body of the plugging hole of an embodiment of first invention to carry out.

Like this, can obtain the identical effect of manufacture method of honeycomb structured body with the plugging hole of an embodiment of first invention.

In the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, same with the manufacture method of honeycomb structured body of the plugging hole of an embodiment of first invention, after sealing of hole slurry 13 dryings at the position that will contact with the face 10 of end face packaged unit 9, can remove end face packaged unit 9 from the honeycomb precursor 18 (with reference to Fig. 6) of plugging hole, also can use the end face packaged unit 9 that constitutes by inflammable substance as the end face packaged unit, end face packaged unit 9 is disappeared.Also have, the occasion that end face packaged unit 9 is disappeared also can make the masking layer 19 (with reference to Fig. 7) of the peristome that covers the hole outside the specific hole disappear with end face packaged unit 9.

And, in the manufacture method of the honeycomb structured body of the plugging hole of present embodiment, for obtain as stated above, the honeycomb structured body 1 of as shown in Figure 1 plugging hole, also can be on the inner surface in its next door 4 and/or portion's mounting catalyst within it.

Below, an embodiment of the honeycomb structured body of the present invention's (the 3rd invention) plugging hole is described.The honeycomb structured body of the plugging hole of present embodiment is the honeycomb structured body that adopts the plugging hole of the above-mentioned first or second working of an invention mode (manufacture method of the honeycomb structured body of plugging hole) manufacturing.As shown in Figure 1, the honeycomb structured body 1 of the plugging hole of present embodiment has the parts 3 of honeycomb structured body 2 cylindraceous and plugging hole, wherein, described honeycomb structured body 2 has the next door 4 of porous matter, this next door 4 forms a plurality of holes 5 as fluid flowing path at interval, the parts 3 of described plugging hole are with the peristome 6a shutoff of the end of specific hole 5a, simultaneously with the peristome 6b shutoff of the other end of remaining hole 5b, wherein, the part of the peristome 6 in a hole 5 of shutoff of the parts 3 of this plugging hole is integrated formation, simultaneously, at least one end face 7a side at honeycomb structured body 2, as shown in Figure 2, the end face of the parts 3 of plugging hole is smooth, perhaps, and as shown in Figure 3, though form the recess 8 that caves in to the inside from an end end face 7a of honeycomb structured body 2 on the end face of the parts 3 of plugging hole, the degree of depth of the recess 8 of the parts 3 of this plugging hole is smaller or equal to 1mm.The honeycomb structured body 1 of the plugging hole of present embodiment owing to reduced the deposit that deposits on its end face, can be applicable to filters such as DPF well.

In addition, on the end face of the parts 3 of plugging hole, form the honeycomb structured body 1 of the plugging hole of the recess 8 that caves in to the inside from an end end face 7a of honeycomb structured body 2 shown in Fig. 3, but, for example also can be as shown in figure 16, the parts 3 of plugging hole are outstanding laterally from the end face of honeycomb structured body 2, form the recess 8 that caves in to the inside from an end end face 7a of honeycomb structured body 2 on the end face of the parts 3 of this plugging hole.The degree of depth of recess 8 at this moment is meant from the outermost outstanding position of the parts 3 of plugging hole the degree of depth at the position of depression to the inside.The parts 3 of plugging hole as shown in figure 16, under the situation that has disposed the masking layer that plugging hole uses on the end end face 7a of honeycomb structured body 2, formed be equivalent to this masking layer thickness part as outstanding position.

In addition, as Fig. 2, Fig. 3 and shown in Figure 16, the honeycomb structured body 1 of the plugging hole of present embodiment, owing to be to adopt the above-mentioned first or second working of an invention mode (manufacture method of the honeycomb structured body of plugging hole) to make, thereby the parts 3 of plugging hole are disposable filling sealing of hole slurry and forming in specific hole 5a, the parts 3 of each plugging hole of the peristome 6 in each hole 5 of shutoff one respectively constitute, thereby resistance to sudden heating etc. is good.Therefore, the honeycomb structured body 1 of the plugging hole of present embodiment goes for high temperature, environment that variations in temperature is violent.In addition, its manufacturing process is easy, and can low-costly make.

Constitute the material in the next door 4 of the honeycomb structured body 2 that uses in the honeycomb structured body 1 of plugging hole of present embodiment,, and require during as filters such as DPF durablely, thereby be fit to use porous ceramic because next door 4 must be a porous matter.As porous ceramic, can use at least a pottery of from cordierite, mullite, aluminium oxide, spinelle, carborundum, silicon nitride, lithium aluminium silicate and aluminium titanates, selecting.

Shape for honeycomb structured body 2, have no particular limits, for example be column structure as shown in Figure 1,, can enumerate polygon, circle, ellipse, Long Circle, irregular shapes etc. such as quadrangle with the vertical section configuration (end surface shape) of central shaft of the column structure of honeycomb structured body 2.In addition, the section configuration in hole is also had no particular limits, can exemplify triangle, quadrangle, hexagon, circle etc.In addition, employed honeycomb structured body 2 in the honeycomb structured body 1 of the plugging hole of present embodiment can suitably use the honeycomb structured body that uses in the honeycomb structured body of known plugging hole in the past.

The material of the parts 3 of plugging hole can be used at least a pottery of selecting in the preferred material in the next door 4 of enumerating from above.In the honeycomb structured body 1 of the plugging hole of present embodiment, the parts 3 of plugging hole can be identical with the material in next door 4, also can be different.

In addition, in the honeycomb structured body 1 of the plugging hole of present embodiment, the parts 3 of plugging hole also can be to have the porous body of the pore-creating material being burnt the pore that the back forms.Specifically, use the sealing of hole slurry contain the pore-creating material to form the parts 3 of plugging hole, in the firing process of one of manufacturing process, these pore-creating materials are burnt and formed pore, preferably use such porous plastid.In addition, the parts of plugging hole 3 are made of porous plastid, can reduce the pressure loss of the honeycomb structured body 1 of plugging hole, are particularly suitable for filters such as DPF.As the kind of such pore-creating material, can exemplify aptly at the pore-creating material described in the first working of an invention mode.

In addition, in the honeycomb structured body 1 of the plugging hole of present embodiment, so long as in an end end face 7a one side as the honeycomb structured body 2 of fluid inflow side, the end face of the parts 3 of plugging hole is smooth, perhaps both made and on this end face, formed the recess that caves in to the inside from an end end face 7a of honeycomb structured body 2, but concave depth just can smaller or equal to 1mm, for example also can be, in the other end of honeycomb structured body 2 7b one side, the end face of the parts 3 of plugging hole also is smooth, perhaps also form the inboard mutually recess that caves on the end face of the parts 3 of plugging hole, but its degree of depth is smaller or equal to 1mm from the other end end face 7b of honeycomb structured body 2.

Usually, with the honeycomb structured body 1 of plugging hole during as filters such as DPF, deposit is to be deposited on the end face that flows into a side, promptly on the end end face 7a, therefore, needing only at one end, the end face of the parts 3 of end face 7a one side seal plug-hole is above-mentioned structure, but, consider that from the angle that improves resistance to sudden heating in other end end face 7b one side, the end face of the parts 3 of plugging hole also can be above-mentioned structure.

In addition, in the honeycomb structured body 1 of the plugging hole of present embodiment, also can hold catalyst inner surface and/or its inner carrying in its next door 4.Particularly, with the honeycomb structured body 1 of plugging hole occasion, preferably carry the catalyst of holding effect with deposit (particulate material) burning that promotes that next door 4 is captured as DPF.Such catalyst for example can be enumerated Pt, Pd, the Rh etc. of noble metal system or the perovskite type catalyst of nonmetal system etc.

Embodiment

Below, specify the present invention by embodiment, but the present invention is not limited to following examples.

In embodiment and comparative example, make the honeycomb structured body of plugging hole by the following stated, promptly, ceramics forming raw material extrusion molding, obtain having the honeycomb structured body that do not burn till that forms at interval as the tubular in the porous matter next door in a plurality of holes of fluid flowing path, the honeycomb structured body that does not burn till of gained is burnt till, obtain honeycomb structured body, in the peristome of the other end in the peristome of the end in the specific hole of resulting honeycomb structured body and remaining hole, filling contains the sealing of hole slurry of pottery, obtains the structure precursor of plugging hole; Honeycomb precursor to resulting plugging hole burns till, and makes the honeycomb structured body of plugging hole.

In embodiment and comparative example, use to add cordierite and form material mixing behind powder, adhesive, dispersant and the water, make circle, length that end surface shape is φ 200mm and be cylindric, the quadrangle that is shaped as 1.8mm * 1.8mm in hole of 200mm, the density that next door thickness is 300 μ m, hole is 0.3/mm as the ceramics forming raw material ²The honeycomb structured body of plugging hole.In addition, the degree of depth of the plugging hole in the honeycomb structured body of this plugging hole is 10mm.

In addition, in following embodiment and comparative example, employed sealing of hole slurry all is to add to mix after cordierite is formed powder, adhesive, dispersant and water, the viscosity of this slurry is adjusted to the material of 200dPas.

Embodiment 1

In embodiment 1, when the sealing of hole slurry being filled in the peristome of an end in specific hole of honeycomb structured body, on an end end face of honeycomb structured body, the masking layer of the peristome that covers hole in addition, specific hole is set, obtain having the honeycomb structured body of masking layer, one end end face of the honeycomb structured body that has masking layer of gained is pressed to the sealing of hole slurry of mounting specified quantitative, the end face packaged unit that constitutes by aluminium foil, in the specific hole of an end end face side, fill the sealing of hole slurry, and, under the state of an end end face of the end face packaged unit being pressed to the honeycomb structured body that has masking layer, to the sealing of hole slurry drying at the position that the major general contacts with the end face packaged unit, obtain the honeycomb structured body of plugging hole.

Embodiment 2

In embodiment 2, except the end face packaged unit uses polyethylene film, make the honeycomb structured body of plugging hole according to the manufacture method identical with embodiment 1.

Comparative example 1

In comparative example 1, when in the peristome of the end in the specific hole of honeycomb structured body, filling the sealing of hole slurry, the honeycomb structured body that will have masking layer is pressed in the container that is contained with a large amount of sealing of hole slurry, after in the peristome in specific hole, filling the sealing of hole slurry, to have the state of having filled the sealing of hole slurry in the peristome of honeycomb structured body with specific hole of masking layer takes out from container, obtain the honeycomb precursor of plugging hole, honeycomb precursor to the plugging hole of gained carries out drying, burns till, and makes the honeycomb structured body of plugging hole.

Investigate

The honeycomb precursor of the plugging hole made from the described method of comparative example all forms the pit of the degree of depth more than 1mm when dry on almost whole of plugging hole end surface side, burn till the pit of back more than residual degree of depth 1mm on the whole surface.Relative therewith, the honeycomb precursor of the plugging hole of making according to embodiment 1 and embodiment 2 described methods has only the pitting of several degree of depth smaller or equal to 1mm after drying, also obtain good result after burning till.

The possibility of utilizing on the industry

The honeycomb structured body of plugging hole of the present invention, owing to can reduce the deposit that deposits at its end face, Thereby go for the filters such as DPF. In addition, the honeycomb structured body manufacturing side of plugging hole of the present invention Method can be easily and make at low cost the honeycomb structured body of above-mentioned plugging hole.

Claims

1. the manufacture method of the honeycomb structured body of plugging hole, with ceramics forming raw material extrusion molding, the tubular that obtains having porous matter next door does not burn till honeycomb structured body, described porous matter next door forms a plurality of holes as fluid flowing path at interval, above-mentionedly do not burn till honeycomb structured body or do not burn till that honeycomb structured body burns till and in the peristome of the other end in the peristome of the end in the specific hole of the honeycomb structured body that obtains and all the other holes resulting above-mentioned, filling contains the sealing of hole slurry of pottery, obtain the honeycomb precursor of plugging hole, the honeycomb precursor of resulting above-mentioned plugging hole is burnt till, thereby obtain the honeycomb structured body of plugging hole, it is characterized in that:

When in the peristome of the end in described described specific hole of not burning till honeycomb structured body or described honeycomb structured body, filling described sealing of hole slurry at least, on a described end end face that does not burn till honeycomb structured body or described honeycomb structured body, the masking layer of the peristome that covers the hole beyond the described specific hole is set, obtain having the honeycomb structured body of masking layer, simultaneously, described the described sealing of hole slurry of going up the mounting ormal weight of described below end face packaged unit, with the above-mentioned end end face side pressure of the described honeycomb structured body that has a masking layer described to the described end face packaged unit of the described sealing of hole slurry of mounting, in the described specific hole of a described end end face side, fill described sealing of hole slurry, and, under the state of a described end end face side of the described face of described end face packaged unit being pressed to the described honeycomb structured body that has a masking layer, to the described sealing of hole slurry drying of major general with described position that contacts of described end face packaged unit, obtain the honeycomb precursor of described plugging hole, wherein, end face packaged unit recited above has the face of prescribed level, when in the above-mentioned peristome in described specific hole, filling described sealing of hole slurry, make described to contact, to limit moving of described sealing of hole slurry in the described particular bore with an above-mentioned described end end face that has the honeycomb structured body of masking layer.

2. the manufacture method of the honeycomb structured body of plugging hole, with ceramics forming raw material extrusion molding, obtain having porous matter next door tubular do not burn till honeycomb structured body, described porous matter next door forms a plurality of holes as fluid flowing path at interval, do not burn till honeycomb structured body or do not burn till that honeycomb structured body burns till and in the peristome of the other end in the peristome of the end in the specific hole of the honeycomb structured body that obtains and all the other holes gained above-mentioned described, filling contains the sealing of hole slurry of pottery, obtain the honeycomb precursor of plugging hole, burn till the honeycomb precursor of resulting described plugging hole, thereby obtain the honeycomb structured body of plugging hole, it is characterized in that:

When in the peristome of the end in described described specific hole of not burning till honeycomb structured body or described honeycomb structured body, filling described sealing of hole slurry at least, on a described end end face that does not burn till honeycomb structured body or described honeycomb structured body, the masking layer of the peristome that covers the hole beyond the described specific hole is set, obtain having the honeycomb structured body of masking layer, after in the described specific hole of the described end end face side of the resulting honeycomb structured body that has a masking layer, filling described sealing of hole slurry, under the state of a described end end face side of the described face of end face packaged unit described below being pressed to the described honeycomb structured body that has a masking layer, to the described sealing of hole slurry drying of major general with described position that contacts of described end face packaged unit, obtain the honeycomb precursor of described plugging hole, wherein, end face packaged unit recited above has the face of prescribed level, by making described to contact, limit moving of described sealing of hole slurry in the described specific hole with a described described end end face that has the honeycomb structured body of masking layer.

3. the manufacture method of the honeycomb structured body of claim 1 or 2 plugging holes of being put down in writing, wherein, with the described sealing of hole slurry drying at described position that contacts of described end face packaged unit after, described end face packaged unit is removed from the honeycomb precursor of described plugging hole.

4. the manufacture method of the honeycomb structured body of claim 1 or 2 plugging holes of being put down in writing wherein, is used the described end face packaged unit that is made of inflammable substance, when burning till the honeycomb precursor of described plugging hole, described end face packaged unit is disappeared.

5. the manufacture method of the honeycomb structured body of the plugging hole put down in writing of claim 4, wherein, when burning till the honeycomb precursor of described plugging hole, the described masking layer of the peristome that covers the hole beyond the described specific hole is disappeared with described end face packaged unit.

6. the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing among the claim 1-5, wherein, described end face packaged unit be have flexible tabular.

7. the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing among the claim 1-6, wherein, described end face packaged unit is the top unlimited tubular that has the bottom.

8. the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing among the claim 1-7, wherein, described sealing of hole slurry contains the pore-creating material.

9. the manufacture method of the honeycomb structured body of each plugging hole of putting down in writing among the claim 1-8, wherein, the viscosity of described sealing of hole slurry is 100～1500dPas.

10. the honeycomb structured body of plugging hole, this honeycomb structured body has the parts of honeycomb structured body cylindraceous and plugging hole, described honeycomb structured body cylindraceous has the next door of porous matter, these next doors form a plurality of holes as fluid flowing path at interval, the parts of described plugging hole are with the peristome sealing of an end in specific hole, simultaneously also with the peristome sealing of the other end in remaining hole, it is characterized in that, the parts of the described plugging hole of the peristome in each described hole of shutoff are integrated formations, simultaneously, at least one end face side at described honeycomb structured body, the end face of the parts of described plugging hole is smooth, perhaps, though form the recess that caves in to the inside from an end end face of described honeycomb structured body on the end face of the parts of described plugging hole, the above-mentioned concave depth of the parts of described plugging hole is smaller or equal to 1mm.

11. the honeycomb structured body of the plugging hole that claim 10 is put down in writing, wherein, other end end face side at described honeycomb structured body, the end face of the parts of described plugging hole also is smooth, perhaps, though form the recess that caves in to the inside from the end face of the other end of described honeycomb structured body on the end face of the parts of described plugging hole, the above-mentioned concave depth of the parts of described plugging hole is smaller or equal to 1mm.