JP6102114B2 - Monolith type ceramic filter substrate and manufacturing method thereof - Google Patents

Monolith type ceramic filter substrate and manufacturing method thereof Download PDF

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JP6102114B2
JP6102114B2 JP2012169047A JP2012169047A JP6102114B2 JP 6102114 B2 JP6102114 B2 JP 6102114B2 JP 2012169047 A JP2012169047 A JP 2012169047A JP 2012169047 A JP2012169047 A JP 2012169047A JP 6102114 B2 JP6102114 B2 JP 6102114B2
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中村　浩
浩 中村
孝行 宇賀神
孝行 宇賀神
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Meidensha Corp
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本発明は、セラミックス多孔体からなる筒状基材に原液流路となる多数のセルを具備してなるモノリス型のセラミックスフィルタ用基材とその製造方法に関するものである。   The present invention relates to a monolithic ceramic filter base material comprising a cylindrical base material made of a ceramic porous body and a large number of cells serving as a stock solution flow path, and a method for producing the same.

セラミックスフィルタ用基材が、セラミックスフィルタとして用いられるのは、高分子膜等と比較して、物理的強度、耐久性に優れるため信頼性が高いこと、耐食性が高いため酸、アルカリ等による洗浄を行なっても劣化が少ないこと、更には、濾過能力を決定する細孔径の精密な制御が可能である点で、高分子膜等よりも優れているので、セラミックスフィルタは、固液分離用のフィルタ等に用いられている。   Ceramic filter base materials are used as ceramic filters because they are superior in physical strength and durability because of their high physical strength and durability, and because they have high corrosion resistance, they can be washed with acids, alkalis, etc. The ceramic filter is superior to polymer membranes and the like in that it is less deteriorated even if it is performed, and moreover, it is possible to precisely control the pore diameter that determines the filtration capacity. Etc. are used.

セラミックスフィルタは、平板状、チューブ状等、種々の形状に加工されたセラミックス多孔体を濾材として濾過を行なうが、単位体積当たりの濾過面積が大きく、濾過処理能力が高い点において、セラミックス多孔体からなる筒状のセラミックスフィルタ用基材に原液流路となる多数のセルを具備した、いわゆるモノリス型フィルタが広く利用されている。   A ceramic filter performs filtration using a ceramic porous body processed into various shapes such as a flat plate shape and a tube shape as a filter medium. From the viewpoint of a large filtration area per unit volume and a high filtering capacity, A so-called monolithic filter in which a cylindrical ceramic filter substrate is provided with a large number of cells serving as a stock solution flow path is widely used.

モノリス型フィルタのセルとしては、基材の単位体積当たりの濾過面積を大きくとることができる点において、断面形状が六角形、或いは円形セルのようなコーナー部を有しないセル等が好ましいとされている。   As a cell of the monolith type filter, a cell having no corner portion such as a hexagonal shape or a circular cell is considered preferable in that the filtration area per unit volume of the substrate can be increased. Yes.

図１４はモノリス型フィルタの一例を示す。このモノリス型フィルタ１０１は、例えば内接円２．５ｍｍ程度の六角形セル１０２を多数具備するように形成されている。このような大容量のフィルタの場合、濾過水を外部に排出することが困難なために、フィルタ基材内が直接外部と連通するように、特定のセル群を集水セル１０２ａとし、この集水セル群と外部とを連通するようにフィルタ基材を横断したスリット１０３を設け、この部分に濾過水を集めて外部に排出するようにしている。   FIG. 14 shows an example of a monolith type filter. The monolithic filter 101 is formed to include a large number of hexagonal cells 102 having an inscribed circle of about 2.5 mm, for example. In the case of such a large-capacity filter, since it is difficult to discharge filtered water to the outside, a specific cell group is set as a water collection cell 102a so that the inside of the filter base material communicates directly with the outside. A slit 103 is provided across the filter base so that the water cell group communicates with the outside, and filtered water is collected in this portion and discharged to the outside.

集水セル１０２ａとスリット１０３は、所定数の濾過膜セル１０２ｂを数列ごとに群にした各濾過膜セル群の間に位置するように配置している。   The water collection cells 102a and the slits 103 are arranged so as to be positioned between the filtration membrane cell groups in which a predetermined number of filtration membrane cells 102b are grouped every several rows.

排出口の位置は、筒状のセラミックスフィルタ用基材の中央部や端面部、端面部近傍等に設けられている。   The position of the discharge port is provided in the central part, end face part, end face part vicinity, etc. of the cylindrical ceramic filter substrate.

前記スリット１０３の数や、図１５に示す筒状のセラミックスフィルタ用基材の外周面１０１ａに開口するスリット１０３先端の排出口１０３ａの位置は、被処理水の特性、フィルタの大きさ（径、長さ）などにより最適なものが選択される。集水セル１０２ａの開口端部は、封止材１０４で封止されている。（例えば、特許文献１参照）。   The number of the slits 103 and the position of the discharge port 103a at the tip of the slit 103 opened in the outer peripheral surface 101a of the cylindrical ceramic filter substrate shown in FIG. 15 are the characteristics of the water to be treated, the size of the filter (diameter, The optimum one is selected depending on the length). The open end of the water collection cell 102 a is sealed with a sealing material 104. (For example, refer to Patent Document 1).

また、図１６に示すように、集水セル１０２ａの断面形状は、スリット施工が容易となるように四角形とし、且つ集水セル１０２ａに隣接する濾過膜セルである特定濾過膜セル１０２ｂの形状を七角形、或いは五角形、円形にし、特定濾過膜セル１０２ｂ以外の濾過膜セル１０２ｃを、六角形等として、集水セル１０２ａと特定濾過膜セル１０２ｂの間に平面状の隔壁１０５を形成したものが開発されている。（例えば、特許文献２参照）。なお、このようなセルの形状の組み合わせとして、前記特許文献１，２の他に特許文献３などが知られている。   Further, as shown in FIG. 16, the cross-sectional shape of the water collection cell 102a is a quadrangular shape so that the slit construction is easy, and the shape of the specific filtration membrane cell 102b, which is a filtration membrane cell adjacent to the water collection cell 102a, is used. A heptagonal, pentagonal, or circular filter membrane cell 102c other than the specific filter membrane cell 102b is formed as a hexagon or the like, and a planar partition wall 105 is formed between the water collection cell 102a and the specific filter membrane cell 102b. Has been developed. (For example, refer to Patent Document 2). In addition to Patent Documents 1 and 2, Patent Document 3 is known as such a combination of cell shapes.

特開２０００−３４２９２０JP 2000-342920 A 特開２００４−３０６０２０JP 2004-306020 A 特開２００４−３０５９９３JP-A-2004-305993

ところで、前述したように、四角形の集水セル１０２ａと、五角形、七角形等の濾過膜セル１０２ｂを組み合わせた場合には、スリット施工は容易になるという利点がある。   By the way, as described above, when the square water collection cell 102a and the pentagonal, heptagonal, etc. filtration membrane cell 102b are combined, there is an advantage that slitting is easy.

しかし、四角形の集水セル１０２ａ以外の濾過膜セルは、五角形、六角形、七角形であって、その断面形状に違いがある。   However, the filtration membrane cells other than the rectangular water collection cell 102a are pentagonal, hexagonal, and heptagonal, and have different cross-sectional shapes.

よって、押出成形時にこれらのセルを形成する押出ピンの周辺での坏土の流動性に差異が発生する。そして、基材内部において成形不良が生じ、乾燥不良、焼成不良、例えば、割れを起こす可能性があるという課題があった。
前記課題は、セルの断面形状を極力、同形状にすることにより解決することができる。 Therefore, a difference occurs in the fluidity of the clay around the extrusion pins forming these cells during extrusion molding. And there existed the subject that a shaping | molding defect arises inside a base material, and a drying defect and a baking defect, for example, a crack may be raise | generated.
The above-mentioned problem can be solved by making the cross-sectional shape of the cell as much as possible.

しかし、全てのセルを同じ形状、例えば、図１７に示すように、六角形にした場合には、押出成形の点においては好ましいものの、集水セル群にスリット１０３を形成する場合に、隣接する濾過膜セル群との間隔が狭いことから、スリット施工時にセル隔壁１５の肉厚ｔが薄くなって、強度低下を惹起する可能性があった。Ｂは、スリット１０３の幅である。   However, when all the cells have the same shape, for example, a hexagonal shape as shown in FIG. 17, it is preferable in terms of extrusion molding, but when forming the slits 103 in the water collection cell group, they are adjacent. Since the distance between the filtration membrane cell group is narrow, the wall thickness t of the cell partition wall 15 becomes thin at the time of slit construction, which may cause a decrease in strength. B is the width of the slit 103.

前記セル隔壁１０５の肉厚ｔを厚くするためにセルの間隔ピッチＴを大きくすることが考えられるがセルの間隔ピッチＴを変えると、隔壁１０５の厚みが周辺と異なったものになり、押出成形、乾燥、焼成時において、不具合を惹起する可能性があり好ましい対策とは言えなかった。   It is conceivable to increase the cell spacing pitch T in order to increase the thickness t of the cell partition wall 105. However, if the cell spacing pitch T is changed, the thickness of the partition wall 105 will be different from the surrounding area, and extrusion molding will be performed. However, it may not be a preferable measure because it may cause problems during drying and firing.

そこで、本発明者らは、前記従来の問題点を解決するために、鋭意研究を重ねた結果、集水セル群と共にセラミックスフィルタ用基材のセル群を構成する濾過膜セル群を、集水セル群に隣接する特定濾過膜セル群と、それ以外の非特定濾過膜セル群とに区分し、スリット施工を施す集水セル群と、これに隣接する部位に位置する特定濾過膜セル群との間隔を確保するために、特定濾過膜セル群のセル形状を、非特定濾過膜セル群のセル形状と類似する断面形状で、且つ前記集水セル群に対向する側の面が平面又は円弧面に形成することにより、
（１）基材押出成形工程において、坏土の流動性にムラが発生するのを防止して、基材内部において成形不良が生じるのを防止することにより、乾燥不良、焼成不良、例えば、割れを起こすのを抑制することが可能であること、
（２）また、特定濾過膜セルの前記集水セル群に対向する側の面を、平面又は円弧面とすることにより、スリット施工時にセル隔壁の肉厚が薄くなって、強度低下を惹起するのを防止することが可能であること、
を見出して、その知見に基づいてモノリス型のセラミックスフィルタ用基材と、その製造方法を開発したものである。 Therefore, the present inventors have conducted extensive research to solve the above-described conventional problems, and as a result, collected the filtration membrane cell group that constitutes the cell group of the ceramic filter base material together with the water collection cell group. A specific filtration membrane cell group adjacent to the cell group and a non-specific filtration membrane cell group other than that, and a water collection cell group that performs slit construction, and a specific filtration membrane cell group that is positioned adjacent to this In order to ensure the interval, the cell shape of the specific filtration membrane cell group has a cross-sectional shape similar to the cell shape of the non-specific filtration membrane cell group, and the surface facing the water collection cell group is a flat surface or an arc. By forming on the surface,
(1) In the base material extrusion molding process, by preventing the occurrence of unevenness in the fluidity of the kneaded material and preventing the formation of molding defects inside the base material, poor drying, poor firing, for example, cracking That it is possible to suppress the occurrence of
(2) Moreover, by making the surface of the specific filtration membrane cell facing the water collection cell group into a flat surface or a circular arc surface, the thickness of the cell partition wall is reduced at the time of slit construction, causing a decrease in strength. That it is possible to prevent
The monolith type ceramic filter base material and its manufacturing method were developed based on the knowledge.

請求項１は、セラミックス多孔体からなる筒状基材と、筒状基材の両端面に開口し、且つ筒状基材内に貫通並設した多数のセルを備え、各セルの断面形状は、多角形及び／又は円形であるモノリス型のセラミックスフィルタ用基材であり、
前記多数のセルは、筒状基材断面を横断するように平行した複数のセル列からなる濾過膜セル群と、各濾過膜セル群間に平行に位置する集水セル群とに区分され、
前記濾過膜セル群は、集水セル群の両側に隣接して対向する特定濾過膜セル群と、特定濾過膜セル群以外の非特定濾過膜セル群とに区分され、
前記特定濾過膜セル群のセルの断面形状は、前記集水セル群に対向する側の面が平面又は円弧面に形成され、
前記筒状基材には、前記集水セル群を構成する各セル壁を貫通、横断して、前記筒状基材の外部に連通、開口する集水スリットが形成され、
前記筒状基材の端面を横断した状態で該端面に面取り形成された目封止材充填用の凹部には、目封止材が充填された状態で、前記集水スリット及び／又は集水セルが一括して封止されている。 Claim 1 comprises a cylindrical base material made of a porous ceramic body, and a large number of cells that are open at both end faces of the cylindrical base material and are arranged in parallel through the cylindrical base material. , A monolithic ceramic filter substrate that is polygonal and / or circular,
The plurality of cells are divided into filtration membrane cell groups composed of a plurality of parallel cell rows so as to cross the cross section of the cylindrical substrate, and water collection cell groups positioned in parallel between the filtration membrane cell groups,
The filtration membrane cell group is divided into a specific filtration membrane cell group facing and adjacent to both sides of the water collection cell group, and a non-specific filtration membrane cell group other than the specific filtration membrane cell group,
The cross-sectional shape of the cells of the specific filtration membrane cell group is formed such that the surface facing the water collection cell group is a flat surface or an arc surface.
In the tubular base material, a water collecting slit is formed that penetrates and traverses each cell wall constituting the water collection cell group, communicates with the outside of the cylindrical base material, and opens.
The recessed portion for filling the plugging material chamfered on the end surface in a state of crossing the end surface of the cylindrical base material is filled with the plugging material, and the water collecting slit and / or the water collecting material is filled. The cells are sealed together.

請求項２は、請求項１に記載のモノリス型のセラミックスフィルタ用基材において、
前記非特定濾過膜セル群のセルの断面形状を、六角形又は円形に形成し、
前記特定濾過膜セル群のセルの断面形状を、前記集水セル群に対向する側の面が平面又は円弧面となるように、五角形、七角形、円弧面五角形、円形の何れかの形状に形成し、
前記集水セル群のセルの断面形状を、前記非特定濾過膜セル群のセルと同様に六角形又は円形に形成したことを特徴とする。 Claim 2 is the monolithic ceramic filter substrate according to claim 1,
The cross-sectional shape of the cells of the non-specific filtration membrane cell group is formed into a hexagon or a circle,
The cross-sectional shape of the cells of the specific filtration membrane cell group is any one of pentagon, heptagon, arcuate pentagon, and circle so that the surface facing the water collection cell group is a flat surface or an arc surface. Forming,
The cross-sectional shape of the cells of the water collection cell group is formed in a hexagonal shape or a circular shape like the cells of the non-specific filtration membrane cell group.

請求項３は、請求項２記載のモノリス型のセラミックスフィルタ用基材において、
前記集水スリットの幅寸法は、前記集水セル群のセルが六角形の場合には、その対角寸法よりも小さい寸法とし、前記集水セル群のセルが円形の場合には、その直径寸法よりも小さい寸法としたことを特徴とする。 Claim 3 is, in the ceramic filter substrate according to claim 2 monolithic described,
The width dimension of the water collecting slit is smaller than the diagonal dimension when the cells of the water collecting cell group are hexagonal, and the diameter when the cells of the water collecting cell group are circular. The size is smaller than the size.

請求項４は、セラミックス多孔体からなる筒状基材の端面に開口する多数の濾過膜セル群と、濾過膜セル群間に位置する集水セル群と、前記集水セル群を貫通、横断して前記筒状基材の外部に連通、開口する集水スリットと、該集水スリット及び/又は集水セルの筒状基材の端面側の端部を閉塞する目封止材と、を備えたモノリス型のセラミックスフィルタ用基材の製造方法であって、
前記濾過膜セル群又は集水セル群となる多数のセルを形成した未乾燥、未焼成のモノリス型のセラミックスフィルタ用基材を押出成形する押出成形工程と、
前記押出成形した未焼成のモノリス型のセラミックスフィルタ用基材を乾燥，焼成する乾燥，焼成工程と、
前記集水セル群を構成する各セル壁を前記筒状基材を貫通する方向に横断して前記筒状基材の外部に連通する集水スリットを形成する集水スリット形成工程と、
を有し、
前記押出成形工程において、前記濾過膜セル群を、集水セル群の両側に隣接して対向する特定濾過膜セル群と、特定濾過膜セル群以外の非特定濾過膜セル群とに区分し、前記特定濾過膜セル群のセルの断面形状を、前記集水セル群に対向する側の面が平面又は円弧面に形成し、
前記集水スリット形成工程の後に、
前記筒状基材の端面を横断した状態で該端面に目封止材充填用の凹部を面取り形成する凹部形成工程と、
前記凹部に目封止材を充填して集水スリット及び／又は集水セルを一括して封止する目封止材充填工程と、
を有する。 Claim 4 includes a large number of filtration membrane cell groups opened on the end face of a cylindrical substrate made of a ceramic porous body, a water collection cell group located between the filtration membrane cell groups, and penetrating through the water collection cell group. A water collecting slit that communicates with and opens to the outside of the cylindrical base material, and a plugging material that closes the end of the cylindrical base material of the water collecting slit and / or the water collecting cell. A method for producing a monolithic ceramic filter substrate comprising:
An extrusion process for extruding an undried, unfired monolithic ceramic filter base material in which a number of cells to be the filtration membrane cell group or the water collection cell group are formed;
Drying and firing steps for drying and firing the extruded unfired monolithic ceramic filter substrate; and
A water collection slit forming step of forming a water collection slit that crosses each cell wall constituting the water collection cell group in a direction penetrating the cylindrical base material and communicates with the outside of the cylindrical base material;
Have
In the extrusion molding step, the filtration membrane cell group is divided into a specific filtration membrane cell group facing and adjacent to both sides of the water collection cell group, and a non-specific filtration membrane cell group other than the specific filtration membrane cell group, The cross-sectional shape of the cells of the specific filtration membrane cell group, the surface on the side facing the water collection cell group is formed as a flat surface or an arc surface,
After the water collecting slit forming step,
A recess forming step of chamfering a recess for filling the plugging material on the end surface in a state of crossing the end surface of the cylindrical base material;
A plugging material filling step of filling the concave portions with a plugging material and sealing the water collecting slits and / or the water collecting cells together;
Have

（１）請求項１のモノリス型のセラミックスフィルタ用基材は、特定濾過膜セル群のセルの断面形状を、他のセル群のセルの断面形状と類似する形状に形成したので、未焼成のセラミックスフィルタ用基材を押出成形する際に、特定濾過膜セル群のセルと他のセルの間に坏土の偏析した流動が発生するのを抑制し、よって、押出成形、乾燥、焼成において変形、割れが発生するのを防止する。
また、特定濾過膜セル群のセルの、前記集水セル群に対向する側の面が平面又は円弧面になるよう形成したので、特定濾過膜セル群と集水セル群の間の隔壁の肉厚を確保することができ、隔壁が脆弱になるのを防止することができる。また、特定濾過膜セル群と集水セル群の間に十分な集水スリット形成エリアを確保することができる。
（２）請求項２のモノリス型のセラミックスフィルタ用基材は、非特定濾過膜セル群のセルを、六角形又は円形とし、集水セル群のセルを、非特定濾過膜セル群のセルと同様に六角形又は円形に形成したので、未焼成のセラミックスフィルタ用基材を押出成形する際に押出成形ピンの周辺における坏土の偏析した流動を抑制し、よって、押出成形、乾燥、焼成において変形、割れが発生するのを抑制することができる。
また、特定濾過膜セル群のセルを、集水セル群に対向する側の面を平面又は円弧面となる五角形、七角形、円弧面五角形、円形の何れかの形状に形成したので前記非特定濾過膜セルや集水セルの場合と同様に、坏土の偏析した流動を抑制し、よって、押出成形、乾燥、焼成において変形、割れが発生するのを抑制することができる。
（３）以上のモノリス型のセラミックスフィルタ用基材は、集水セル群を構成する各セル壁および前記筒状基材を貫通する方向に横断して前記筒状基材外部に連通する集水スリットを形成したので、集水スリットを介して濾過水を円滑に外部に流出させることができる。
特に、集水スリットの幅寸法を、集水セル群のセルが六角形の場合には、その対角寸法よりも小さい寸法とし、集水セル群のセルが円形の場合には、その直径寸法よりも小さい寸法としたので、集水スリットの存在により、集水セルと特定濾過膜セルのセルとの隔壁が脆弱になるのを最小限に抑えることができる。
（４）また、以上のモノリス型のセラミックスフィルタ用基材は、前記筒状基材の端面に目封止材充填用の凹部を設けたので、該凹部内に目封止材を充填することにより集水スリット及び／又は集水セルを一括して封止することができる。
（５）請求項４のモノリス型のセラミックスフィルタ用基材の製造方法は、前記押出成形工程において、濾過膜セル群を、集水セル群の両側に隣接して対向する特定濾過膜セル群と、特定濾過膜セル群以外の非特定濾過膜セル群とに区分し、前記特定濾過膜セル群のセルの断面形状を、他のセル群のセルの断面形状と類似する形状で、且つ前記集水セル群に対向する側の面が平面又は円弧面に形成したモノリス型のセラミックスフィルタ用基材を製造することができる。
（６）以上のモノリス型のセラミックスフィルタ用基材の製造方法は、前記集水スリット形成工程の後の凹部形成工程によって筒状基材の端面に目封止材充填用の凹部を形成し、凹部形成工程に続く目封止材充填工程によって、前記凹部に目封止材を充填することにより集水スリット及び／又は集水セルを一括して、効果的に封止したモノリス型のセラミックスフィルタ用基材を製造することができる。 (1) Since the monolith-type ceramic filter substrate according to claim 1 has the cross-sectional shape of the cells of the specific filtration membrane cell group formed into a shape similar to the cross-sectional shape of the cells of the other cell groups, When extruding a ceramic filter substrate, it suppresses the occurrence of segregated flow of clay between the cells of the specific filtration membrane cell group and other cells, and thus deformation during extrusion, drying and firing. To prevent cracking.
In addition, since the surface of the specific filtration membrane cell group facing the water collection cell group is formed to be a flat surface or an arc surface, the wall of the partition wall between the specific filtration membrane cell group and the water collection cell group is formed. The thickness can be ensured and the partition wall can be prevented from becoming brittle. Moreover, a sufficient water collection slit formation area can be ensured between the specific filtration membrane cell group and the water collection cell group.
(2) The monolithic ceramic filter substrate according to claim 2 is configured such that the cells of the non-specific filtration membrane cell group are hexagonal or circular, and the cells of the water collection cell group are the cells of the non-specific filtration membrane cell group. Similarly, since it was formed in a hexagonal shape or a circular shape, when extruding an unfired ceramic filter substrate, it suppresses the segregated flow of clay around the extrusion pins, and thus in extrusion, drying and firing. Deformation and cracking can be suppressed.
In addition, since the cells of the specific filtration membrane cell group are formed in any one of a pentagon, heptagon, arc pentagon, and circle whose surface facing the water collection cell group is a flat surface or an arc surface, the non-specific As in the case of the filtration membrane cell and the water collection cell, the segregated flow of the clay can be suppressed, and thus deformation and cracking can be suppressed in extrusion molding, drying, and firing.
(3) The monolithic ceramic filter base material described above is a water collection system that communicates with the outside of the cylindrical base material across the cell walls and the cylindrical base material constituting the water collection cell group. Since the slit is formed, the filtered water can smoothly flow out to the outside through the water collection slit.
In particular, the width dimension of the water collection slit is smaller than the diagonal dimension when the cell of the water collection cell group is hexagonal, and the diameter dimension when the cell of the water collection cell group is circular. Since the size is smaller than that, it is possible to minimize the weakness of the partition wall between the water collection cell and the specific filtration membrane cell due to the presence of the water collection slit.
(4) Moreover, since the above monolith type ceramic filter substrate has a recess for filling the plugging material on the end face of the cylindrical substrate, the plugging material is filled in the recess. Thus, the water collecting slit and / or the water collecting cell can be collectively sealed.
(5) The method for producing a monolithic ceramic filter substrate according to claim 4 is characterized in that, in the extrusion step, the filtration membrane cell group is adjacent to the both sides of the water collection cell group and opposed to the specific filtration membrane cell group. And the non-specific filtration membrane cell group other than the specific filtration membrane cell group, and the cross-sectional shape of the cell of the specific filtration membrane cell group is similar to the cross-sectional shape of the cells of the other cell group, and the collection A monolithic ceramic filter substrate in which the surface facing the water cell group is a flat surface or an arc surface can be manufactured.
Method for producing (6) or more monolithic ceramic filter substrate, a recess of the plugging material for filling the end face of the cylindrical base material by a recess forming step of after the water collecting slits forming step, A monolithic ceramic filter in which water collecting slits and / or water collecting cells are effectively sealed together by filling the concave portions with a plugging material in a plugging material filling step subsequent to the concave portion forming step. Can be produced.

第１の実施形態のセラミックスフィルタ用基材の斜視図。The perspective view of the base material for ceramics filters of 1st Embodiment. 特定濾過膜セル、非特定濾過膜セル、集水セルの配置状態を示す説明図。Explanatory drawing which shows the arrangement | positioning state of a specific filtration membrane cell, a non-specific filtration membrane cell, and a water collection cell. 図２の一部の拡大図。FIG. 3 is an enlarged view of a part of FIG. 2. 図３のＡ−Ａ断面図。AA sectional drawing of FIG. 目封止材を充填した状態の断面図。Sectional drawing of the state filled with the plugging material. 第２の実施形態のセラミックスフィルタ用基材の斜視図。The perspective view of the base material for ceramics filters of 2nd Embodiment. 図４と同様の断面図。Sectional drawing similar to FIG. 目封止材を充填した状態の断面図。Sectional drawing of the state filled with the plugging material. 第３の実施形態のセラミックスフィルタ用基材の斜視図。The perspective view of the ceramic filter base material of 3rd Embodiment. 第４の実施形態を示し、集水セルを円形に形成した場合の説明図。Explanatory drawing at the time of showing a 4th embodiment and forming a water collection cell circularly. 目封止材を充填した状態を示す説明図。Explanatory drawing which shows the state with which the plugging material was filled. Ａ，Ｂ，Ｃ，Ｄは、特定濾過膜セルの第１〜第４例を示す説明図。A, B, C, D is explanatory drawing which shows the 1st-4th example of a specific filtration membrane cell. 本発明の製造方法のフロー図。The flowchart of the manufacturing method of this invention. 従来例の濾過膜セルと集水セルの形状と配置を示す説明図。Explanatory drawing which shows the shape and arrangement | positioning of the filtration membrane cell and water collection cell of a prior art example. 前記従来の濾過膜セルと集水セルを備えたセラミックスフィルタ用基材の斜視図。The perspective view of the base material for ceramics filters provided with the said conventional filtration membrane cell and a water collection cell. 四角形の集水セルを使用したセラミックスフィルタ用基材の説明図。Explanatory drawing of the base material for ceramics filters which uses a square water collection cell. 濾過膜セルと集水セルを六角形に形成した場合の問題点を示す説明図。Explanatory drawing which shows the problem at the time of forming a filtration membrane cell and a water collection cell in a hexagon.

図１〜図５は第１実施例のセラミックスフィルタ用基材１を示す。図１に示すように、セラミックスフィルタ用基材１は、セラミックス多孔体からなる筒状基材２と、筒状基材２の両端面に開口し、且つ筒状基材内に貫通並設した多数のセル３を備えている。多数のセル３は、ハニカム状に整然と配置されている。   1 to 5 show a ceramic filter substrate 1 according to a first embodiment. As shown in FIG. 1, a ceramic filter substrate 1 has a cylindrical base material 2 made of a ceramic porous body, and opens at both end faces of the cylindrical base material 2 and is provided in parallel through the cylindrical base material. A large number of cells 3 are provided. A large number of cells 3 are regularly arranged in a honeycomb shape.

図２に示すように、前記多数のセル３は、筒状基材断面を横断するように平行した複数のセル列からなる濾過膜セル群４と、各濾過膜セル群４間に平行に位置する集水セル群５とに区分されている。   As shown in FIG. 2, the plurality of cells 3 are arranged in parallel between the filtration membrane cell group 4 composed of a plurality of parallel cell rows so as to cross the cross section of the cylindrical substrate, and between the filtration membrane cell groups 4. The water collection cell group 5 is divided.

前記濾過膜セル群４は、集水セル群５の両側に隣接して対向する特定濾過膜セル群６と、特定濾過膜セル群６以外の非特定濾過膜セル群７とに区分されている。   The filtration membrane cell group 4 is divided into a specific filtration membrane cell group 6 that faces and adjoins both sides of the water collection cell group 5 and a non-specific filtration membrane cell group 7 other than the specific filtration membrane cell group 6. .

図３に拡大して示すように、集水セル群５及び非特定濾過膜セル群７の各セルの断面形状は、六角形に形成されている。また、特定濾過膜セル群６の各セルの断面形状は、集水セル群５に対向する側の面６ａが平面又は円弧面になるように七角形に形成されている。   As shown in FIG. 3 in an enlarged manner, the cross-sectional shape of each cell of the water collection cell group 5 and the non-specific filtration membrane cell group 7 is formed in a hexagon. Moreover, the cross-sectional shape of each cell of the specific filtration membrane cell group 6 is formed in a heptagon so that the surface 6a on the side facing the water collection cell group 5 is a flat surface or an arc surface.

集水スリット８は、前記集水セル群を構成する各セル壁および筒状基材２を貫通して形成されている。集水スリット８の幅寸法Ｂは、六角形の集水セルの対角寸法よりも小さい寸法に形成されている。集水スリット８の長さ方向の先端部は、図１に示すように、筒状基材２の外側面２ａに開口している。   The water collecting slit 8 is formed so as to penetrate each cell wall and the cylindrical base material 2 constituting the water collecting cell group. The width dimension B of the water collecting slit 8 is formed to be smaller than the diagonal dimension of the hexagonal water collecting cell. The front end of the water collecting slit 8 in the length direction is open to the outer side surface 2a of the cylindrical base material 2 as shown in FIG.

図４（図３のＡ−Ａ断面図）に示すように、集水スリット８の幅方向の一端部（図４の左端）は、筒状基材２の端面２ｂに開口している。集水スリット８の開口端には面取り等により目封止材充填用の凹部９が形成されている。凹部９の幅寸法Ｃは、集水スリット８の幅寸法Ｂより大で、且つ図１に示すように、筒状基材２の端面２ｂを横断するように形成されている。そして、図５に示すように、前記凹部９に目封止材１０を充填することにより、集水スリット８と集水セル群５の端部が一括して封止される。   As shown in FIG. 4 (A-A cross-sectional view in FIG. 3), one end portion (left end in FIG. 4) of the water collecting slit 8 in the width direction is open to the end surface 2 b of the cylindrical substrate 2. A recess 9 for filling a plugging material is formed at the opening end of the water collecting slit 8 by chamfering or the like. The width C of the recess 9 is larger than the width B of the water collecting slit 8 and is formed so as to cross the end surface 2b of the cylindrical base material 2 as shown in FIG. Then, as shown in FIG. 5, the plugging material 10 is filled in the concave portion 9, whereby the water collecting slit 8 and the end of the water collecting cell group 5 are sealed together.

第１実施例のセラミックスフィルタ用基材１は、前述の構成であって、図３に示すように、特定濾過膜セル群６の集水セル群５に対向する側の面６ａを平坦面に形成したので、特定濾過膜セル群６と集水セル群５の間に比較的広い切削施工エリアを確保でき、集水スリット施工において特定濾過膜セルと集水セルの間の隔壁を脆弱にするという従来の課題を解消することができる。   The ceramic filter substrate 1 of the first embodiment has the above-described configuration, and as shown in FIG. 3, the surface 6 a of the specific filtration membrane cell group 6 facing the water collection cell group 5 is a flat surface. Since it formed, a comparatively wide cutting construction area can be secured between the specific filtration membrane cell group 6 and the water collection cell group 5, and the partition wall between the specific filtration membrane cell and the water collection cell is made weak in the water collection slit construction. The conventional problem can be solved.

また、筒状基材２の端面２ｂに、該端面２ｂを横断する目封止材充填用の凹部９を形成したので、該凹部９に目封止材１０を充填し、且つ目封止材１０の下部を集水スリット８及び／又は集水セル群５の端部に充填することにより集水スリット８及び／又は集水セル群５の封止を確実に行ない、集水スリット群８及び集水セル群５の水密性を確保、維持できる。   Further, since the recess 9 for filling the plugging material across the end surface 2b is formed in the end surface 2b of the cylindrical base material 2, the plugging material 10 is filled in the recess 9 and the plugging material is filled. The water collecting slit 8 and / or the water collecting cell group 5 are surely sealed by filling the lower part of the water collecting slit 8 and / or the end of the water collecting cell group 5, and the water collecting slit group 8 and The water tightness of the water collection cell group 5 can be secured and maintained.

図６〜図８は第２実施例のセラミックスフィルタ用基材１１を示し、図９は第３実施例のセラミックスフィルタ用基材２１を示す。   6 to 8 show the ceramic filter substrate 11 of the second embodiment, and FIG. 9 shows the ceramic filter substrate 21 of the third embodiment.

第２実施例のセラミックスフィルタ用基材１１は、集水スリット８を筒状基材端面から所定の距離Ｌだけ離して、筒状基材２の端面２ｂの近傍に形成した。   The ceramic filter substrate 11 of the second example was formed in the vicinity of the end surface 2 b of the cylindrical substrate 2 by separating the water collecting slit 8 from the end surface of the cylindrical substrate by a predetermined distance L.

集水セル群５の端部には、図６に示すように筒状基材２の端面２ｂを横断し、図７に示すように面取り等により凹部９が形成され、さらに、図８に示すように該凹部９に目封止材１０を充填することにより前記集水セル群５の端部が封止されている。なお、第２実施例の場合は、集水スリット８は、筒状基材２の端面２ｂから所定の距離Ｌ離して形成されているので集水スリット８を目封止する必要はない。   At the end of the water collection cell group 5, as shown in FIG. 6, a recess 9 is formed by chamfering or the like as shown in FIG. Thus, the end of the water collection cell group 5 is sealed by filling the recess 9 with the plugging material 10. In the case of the second embodiment, the water collecting slit 8 is formed a predetermined distance L away from the end surface 2b of the cylindrical base material 2, so that it is not necessary to plug the water collecting slit 8.

また、第３実施例のセラミックスフィルタ用基材２１は、第２実施例の場合よりも更に集水スリット８を筒状基材端面から離し、筒状基材２の長さ方向の略中央部に１個の集水スリット８を形成した場合を示す。他の構成は、第１、２実施例のセラミックスフィルタ用基材１と同様であるので同一構成部分には同一符号を付して重複する。   Further, the ceramic filter base material 21 of the third embodiment further separates the water collecting slit 8 from the end face of the cylindrical base material as compared with the case of the second embodiment, and is substantially in the center in the length direction of the cylindrical base material 2. Shows a case where one water collecting slit 8 is formed. Since other configurations are the same as those of the ceramic filter substrate 1 of the first and second embodiments, the same components are denoted by the same reference numerals and overlapped.

図１０〜図１１は、第４実施例のセラミックスフィルタ用基材を示す。この実施例において、集水セル群５のセルは、円形に形成されている。集水スリット８の幅寸法Ｂは、円形の集水セルの直径寸法よりも小さい寸法に形成されている。   10 to 11 show a ceramic filter substrate of a fourth embodiment. In this embodiment, the cells of the water collection cell group 5 are formed in a circular shape. The width dimension B of the water collecting slit 8 is formed to be smaller than the diameter dimension of the circular water collecting cell.

集水スリット８の筒状基材２の端面側の端部には、図４と同様に面取り等により凹部９が形成されている。凹部９の幅寸法Ｃは、集水スリット８の直径寸法Ｂより大に形成されている。そして、図１１に示すように、前記凹部９に目封止材１０を充填することにより、集水スリット８及び／又は集水セル５が一括して封止される。第４実施例は集水スリット８を円形に形成した以外の構成は、第１〜３実施例のセラミックスフィルタ用基材１と同様であるので同一構成部分には同一符号を付して重複する。   A concave portion 9 is formed by chamfering or the like at the end portion of the water collecting slit 8 on the end surface side of the cylindrical substrate 2 as in FIG. The width C of the recess 9 is formed larger than the diameter B of the water collecting slit 8. And as shown in FIG. 11, the water collection slit 8 and / or the water collection cell 5 are sealed collectively by filling the said sealing part 10 in the said recessed part 9. As shown in FIG. Since the configuration of the fourth embodiment is the same as the ceramic filter substrate 1 of the first to third embodiments except that the water collecting slit 8 is formed in a circle, the same components are denoted by the same reference numerals and overlapped. .

以上、第１実施例から第４実施例においては、特定濾過膜セル６の形状を、図１２Ａに示した集水セル群５に対向する側の面６ａを平坦面とした七角形に形成したが、図１２Ｂに示すように集水セル群５に対向する側の面６ａを平坦面とした五角形であっても、図１２Ｃに示すように集水セル群５に対向する側の面６ａを円弧面とした五角形であっても、或いは図１２Ｄに示すように円形であっても良い。   As described above, in the first to fourth embodiments, the shape of the specific filtration membrane cell 6 is formed in a heptagon having a flat surface 6a on the side facing the water collection cell group 5 shown in FIG. 12A. However, even if it is a pentagon having a flat surface 6a on the side facing the water collection cell group 5 as shown in FIG. 12B, the surface 6a on the side facing the water collection cell group 5 is shown in FIG. 12C. It may be a pentagon with a circular arc surface, or it may be circular as shown in FIG. 12D.

次に、本発明のモノリス型のセラミックスフィルタ用基材の製造方法を図１３の工程図を参照して説明する。   Next, the manufacturing method of the monolith type ceramic filter substrate of the present invention will be described with reference to the process diagram of FIG.

図１３に示すように、本発明の製造方法は、未焼成のモノリス型のセラミックスフィルタ用基材を押出成形する押出成形工程と、押出し成形した未焼成のモノリス型のセラミックスフィルタ用基材を乾燥，焼成する乾燥，焼成工程と、モノリス型のセラミックスフィルタ用基材に集水スリットを形成する集水スリット形成工程と、前記筒状基材の端面に目封止材充填用の凹部を形成する凹部形成工程と、前記凹部に目封止材を充填する目封止材充填工程と、を備えている。   As shown in FIG. 13, the manufacturing method of the present invention includes an extrusion process for extruding an unfired monolithic ceramic filter substrate, and drying the extruded unfired monolithic ceramic filter substrate. , Drying to be fired, firing process, water collecting slit forming process for forming water collecting slits in the monolithic ceramic filter base material, and forming a recess for filling the plugging material on the end face of the cylindrical base material A recessed portion forming step, and a plugging material filling step of filling the recessed portion with a plugging material.

押出成形工程においては、例えば粒子径４０〜１００μmのアルミナセラミックスを主構成材として、これに焼結助剤、バインダー、水を混合した混合物を押出成形機で押出して、前記多数のセルを有するセラミックス多孔体からなる未焼成のモノリス型のセラミックスフィルタ用基材を形成する。   In the extrusion molding process, for example, alumina ceramic having a particle size of 40 to 100 μm is used as a main constituent material, and a mixture in which a sintering aid, a binder and water are mixed is extruded by an extrusion molding machine, and the ceramic having a large number of cells. An unfired monolithic ceramic filter substrate made of a porous material is formed.

乾燥，焼成工程においては、前記未焼成のモノリス型のセラミックスフィルタ用基材を乾燥，焼成する。   In the drying and firing steps, the unfired monolithic ceramic filter substrate is dried and fired.

集水スリット形成工程においては、集水セル群を構成する各セル壁および筒状基材２を貫通して集水スリット８を形成する。図３に示すように、集水スリット８の幅寸法Ｂは、六角形の集水セルの対角寸法よりも小さい寸法に形成し、集水スリット８の長さ方向の先端部は、図１に示すように、筒状基材２の外側面２ａに開口させ、集水スリット８の幅方向の端部は、図４に示すように、前記筒状基材２の端面２ｂに開口させる。   In the water collecting slit forming step, the water collecting slit 8 is formed through each cell wall and the cylindrical base material 2 constituting the water collecting cell group. As shown in FIG. 3, the width dimension B of the water collecting slit 8 is formed to be smaller than the diagonal dimension of the hexagonal water collecting cell, and the front end of the water collecting slit 8 in the length direction is shown in FIG. 1. As shown in FIG. 4, an opening is made on the outer surface 2 a of the cylindrical base material 2, and the end in the width direction of the water collecting slit 8 is opened on the end surface 2 b of the cylindrical base material 2 as shown in FIG. 4.

凹部形成工程においては、図４に示すように、前記集水スリット８の端部に面取り等により目封止材充填用の凹部９を形成する。凹部９の幅寸法Ｃは、集水スリット８の幅寸法Ｂより大に形成する。図１に示すように、凹部９は、筒状基材２の端面を横断するように形成されている。   In the recess forming step, as shown in FIG. 4, a recess 9 for plugging material filling is formed at the end of the water collecting slit 8 by chamfering or the like. The width C of the recess 9 is formed larger than the width B of the water collecting slit 8. As shown in FIG. 1, the recess 9 is formed so as to cross the end surface of the cylindrical base material 2.

目封止材充填工程においては、図４等に示すように、前記凹部９内に目封止材１０を充填して、集水スリット８及び／又は集水セル５を一括して封止する。目封止材１０は、アルミナセラミック等を主成分にして、これに焼結助剤、バインダー等を混合、混練した坏土であり、粘性の高いペースト状に形成されていて、前記凹部９に充填される。前記凹部９は、筒状基材２の端面を横断するように形成されているので、この凹部９に目封止材１０を充填するとともに、該目封止材１０の下端を集水スリット８及び／又は集水セル５の端部に押し込むことにより、集水スリット８及び／又は集水セル５の封止を一括して確実に行なうことができ、水密性を維持することができる。   In the plugging material filling step, as shown in FIG. 4 and the like, the recess 9 is filled with the plugging material 10 and the water collecting slits 8 and / or the water collecting cells 5 are collectively sealed. . The plugging material 10 is a clay in which alumina ceramic or the like is a main component, and a sintering aid, a binder, or the like is mixed and kneaded therein, and is formed in a highly viscous paste, Filled. Since the concave portion 9 is formed so as to cross the end surface of the cylindrical substrate 2, the concave portion 9 is filled with the plugging material 10, and the lower end of the plugging material 10 is disposed at the water collecting slit 8. And / or by pushing into the edge part of the water collection cell 5, the water collection slit 8 and / or the water collection cell 5 can be reliably sealed collectively, and watertightness can be maintained.

なお、前記実施例において、乾燥，焼成工程の後に、集水スリット形成工程、凹部形成工程を行なう構成にしたのは、焼成の際に不可避的に生じる収縮により集水スリットや凹部が変形するのを回避するためであるが、集水スリットや凹部の変形が許容できる範囲である場合には、集水スリット形成工程、凹部形成工程の後に乾燥，焼成工程を行なっても良い。また、前記目封止材１０を凹部９に充填した後に焼成を行なえば、焼成による収縮を抑制することができ、且つ目封止材１０を凹部９内面に密着させて水密強度を向上させることができる。   In addition, in the said Example, it was set as the structure which performs a water collection slit formation process and a recessed part formation process after a drying and a baking process, and a water collection slit and a recessed part deform | transform by the shrinkage which occurs unavoidably at the time of baking. However, when the deformation of the water collecting slit and the concave portion is within an allowable range, a drying and firing step may be performed after the water collecting slit forming step and the concave portion forming step. Further, if firing is performed after filling the plugging material 10 into the recess 9, shrinkage due to firing can be suppressed, and the plugging material 10 is brought into close contact with the inner surface of the recess 9 to improve the watertight strength. Can do.

１，１１，２１…セラミックスフィルタ基材
２…筒状基材
３…セル
４…濾過膜セル群
５…集水セル群
６…特定濾過膜セル群
７…非特定濾過膜セル群
８…集水スリット
９…目封止材充填用の凹部
１０…目封止材 DESCRIPTION OF SYMBOLS 1,11,21 ... Ceramics filter base material 2 ... Cylindrical base material 3 ... Cell 4 ... Filtration membrane cell group 5 ... Water collection cell group 6 ... Specific filtration membrane cell group 7 ... Non-specific filtration membrane cell group 8 ... Water collection Slit 9 ... Recess for filling plugging material 10 ... Plugging material

Claims (4)

セラミックス多孔体からなる筒状基材と、筒状基材の両端面に開口し、且つ筒状基材内に貫通並設した多数のセルを備え、各セルの断面形状は、多角形及び／又は円形であるモノリス型のセラミックスフィルタ用基材であり、
前記多数のセルは、筒状基材断面を横断するように平行した複数のセル列からなる濾過膜セル群と、各濾過膜セル群間に平行に位置する集水セル群とに区分され、
前記濾過膜セル群は、集水セル群の両側に隣接して対向する特定濾過膜セル群と、特定濾過膜セル群以外の非特定濾過膜セル群とに区分され、
前記特定濾過膜セル群のセルの断面形状は、前記集水セル群に対向する側の面が平面又は円弧面に形成され、
前記筒状基材には、前記集水セル群を構成する各セル壁を貫通、横断して、前記筒状基材の外部に連通、開口する集水スリットが形成され、
前記筒状基材の端面を横断した状態で該端面に面取り形成された目封止材充填用の凹部には、目封止材が充填された状態で、前記集水スリット及び／又は集水セルが一括して封止された
を特徴とするモノリス型のセラミックスフィルタ用基材。 A cylindrical base material made of a ceramic porous body, and a plurality of cells that are open at both end faces of the cylindrical base material and are arranged in parallel through the cylindrical base material. Or a monolithic ceramic filter substrate that is circular,
The plurality of cells are divided into filtration membrane cell groups composed of a plurality of parallel cell rows so as to cross the cross section of the cylindrical substrate, and water collection cell groups positioned in parallel between the filtration membrane cell groups,
The filtration membrane cell group is divided into a specific filtration membrane cell group facing and adjacent to both sides of the water collection cell group, and a non-specific filtration membrane cell group other than the specific filtration membrane cell group,
The cross-sectional shape of the cells of the specific filtration membrane cell group is formed such that the surface facing the water collection cell group is a flat surface or an arc surface.
In the tubular base material, a water collecting slit is formed that penetrates and traverses each cell wall constituting the water collection cell group, communicates with the outside of the cylindrical base material, and opens.
The recessed portion for filling the plugging material chamfered on the end surface in a state of crossing the end surface of the cylindrical base material is filled with the plugging material, and the water collecting slit and / or the water collecting material is filled. A monolith type ceramic filter substrate characterized in that cells are collectively sealed. 前記非特定濾過膜セル群のセルの断面形状は、六角形又は円形に形成され、
前記特定濾過膜セル群のセルの断面形状は、前記集水セル群に対向する側の面が平面又は円弧面となるように、五角形、七角形、円弧面五角形、円形の何れかの形状に形成され、
前記集水セル群のセルの断面形状は、前記非特定濾過膜セル群のセルと同様に六角形又は円形に形成されていることを特徴とする請求項１記載のモノリス型のセラミックスフィルタ用基材。 The cross-sectional shape of the cells of the non-specific filtration membrane cell group is formed in a hexagon or a circle,
The cross-sectional shape of the cells of the specific filtration membrane cell group is a pentagonal, heptagonal, arcuate pentagonal, or circular shape so that the surface on the side facing the water collection cell group is a flat surface or a circular arc surface. Formed,
2. The monolithic ceramic filter substrate according to claim 1, wherein the cross-sectional shape of the cells of the water collection cell group is formed in a hexagonal shape or a circular shape like the cells of the non-specific filtration membrane cell group. Wood. 前記集水スリットの幅寸法は、前記集水セル群のセルが六角形の場合には、その対角寸法よりも小さい寸法とし、前記集水セル群のセルが円形の場合には、その直径寸法よりも小さい寸法としたことを特徴とする請求項２記載のモノリス型のセラミックスフィルタ用基材。   The width dimension of the water collecting slit is smaller than the diagonal dimension when the cells of the water collecting cell group are hexagonal, and the diameter when the cells of the water collecting cell group are circular. The monolith type ceramic filter substrate according to claim 2, wherein the substrate is smaller than the size. セラミックス多孔体からなる筒状基材の端面に開口する多数の濾過膜セル群と、濾過膜セル群間に位置する集水セル群と、前記集水セル群を貫通、横断して前記筒状基材の外部に連通、開口する集水スリットと、該集水スリット及び/又は集水セルの筒状基材の端面側の端部を閉塞する目封止材と、を備えたモノリス型のセラミックスフィルタ用基材の製造方法であって、
前記濾過膜セル群又は集水セル群となる多数のセルを形成した未乾燥、未焼成のモノリス型のセラミックスフィルタ用基材を押出成形する押出成形工程と、
前記押出成形した未焼成のモノリス型のセラミックスフィルタ用基材を乾燥，焼成する乾燥，焼成工程と、
前記集水セル群を構成する各セル壁を前記筒状基材を貫通する方向に横断して前記筒状基材の外部に連通する集水スリットを形成する集水スリット形成工程と、
を有し、
前記押出成形工程において、前記濾過膜セル群を、集水セル群の両側に隣接して対向する特定濾過膜セル群と、特定濾過膜セル群以外の非特定濾過膜セル群とに区分し、前記特定濾過膜セル群のセルの断面形状を、前記集水セル群に対向する側の面が平面又は円弧面に形成し、
前記集水スリット形成工程の後に、
前記筒状基材の端面を横断した状態で該端面に目封止材充填用の凹部を面取り形成する凹部形成工程と、
前記凹部に目封止材を充填して集水スリット及び／又は集水セルを一括して封止する目封止材充填工程と、
を有することを特徴とするモノリス型のセラミックスフィルタ用基材の製造方法。 A large number of filtration membrane cell groups opening on the end face of a cylindrical base material made of a ceramic porous body, a water collection cell group positioned between the filtration membrane cell groups, and the tubular shape penetrating through the water collection cell group A monolith type comprising: a water collecting slit that communicates with and opens to the outside of the base material; and a plugging material that closes the end of the cylindrical base material of the water collecting slit and / or the water collecting cell. A method for producing a ceramic filter substrate,
An extrusion process for extruding an undried, unfired monolithic ceramic filter base material in which a number of cells to be the filtration membrane cell group or the water collection cell group are formed;
Drying and firing steps for drying and firing the extruded unfired monolithic ceramic filter substrate; and
A water collection slit forming step of forming a water collection slit that crosses each cell wall constituting the water collection cell group in a direction penetrating the cylindrical base material and communicates with the outside of the cylindrical base material;
Have
In the extrusion molding step, the filtration membrane cell group is divided into a specific filtration membrane cell group facing and adjacent to both sides of the water collection cell group, and a non-specific filtration membrane cell group other than the specific filtration membrane cell group, The cross-sectional shape of the cells of the specific filtration membrane cell group, the surface on the side facing the water collection cell group is formed as a flat surface or an arc surface,
After the water collecting slit forming step,
A recess forming step of chamfering a recess for filling the plugging material on the end surface in a state of crossing the end surface of the cylindrical base material;
A plugging material filling step of filling the concave portions with a plugging material and sealing the water collecting slits and / or the water collecting cells together;
A process for producing a monolithic ceramic filter substrate characterized by comprising:
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