JPH09290413A - Metal die for honeycomb forming - Google Patents
Metal die for honeycomb formingInfo
- Publication number
- JPH09290413A JPH09290413A JP13143096A JP13143096A JPH09290413A JP H09290413 A JPH09290413 A JP H09290413A JP 13143096 A JP13143096 A JP 13143096A JP 13143096 A JP13143096 A JP 13143096A JP H09290413 A JPH09290413 A JP H09290413A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- honeycomb
- honeycomb structure
- die
- outer peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/26—Extrusion dies
- B28B3/269—For multi-channeled structures, e.g. honeycomb structures
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，セラミック製のハニカム構造体
の成形型，特にその構造に関する。TECHNICAL FIELD The present invention relates to a molding die for a honeycomb structure made of ceramics, and particularly to the structure thereof.
【０００２】[0002]
【従来技術】従来より，セラミック製のハニカム構造体
は，例えば，内燃機関の排ガス浄化装置におけるフィル
ターとして用いられている。かかるフィルターとして
は，例えば図１１（ａ）に示すごとく，四角柱状及び三
角柱状のハニカム構造体を複数組み合わせて構成されて
いるフィルター９９がある。2. Description of the Related Art Conventionally, a ceramic honeycomb structure has been used as a filter in an exhaust gas purifying apparatus for an internal combustion engine, for example. As such a filter, for example, as shown in FIG. 11A, there is a filter 99 configured by combining a plurality of quadrangular prismatic and triangular prismatic honeycomb structures.
【０００３】上記フィルター９９を構成する四角柱状の
ハニカム構造体８は，図１１（ｂ）に示すごとく，互い
に直交する内壁８２よりなる本体部８１と，該本体部８
１の外周に設けた最外壁８５とよりなる。そして，本体
部８１には，上記内壁８２により囲まれ前後に延びた排
ガス通路８２０が多数形成されている。As shown in FIG. 11 (b), the quadrangular prismatic honeycomb structure 8 constituting the filter 99 has a main body 81 composed of inner walls 82 orthogonal to each other, and the main body 8
1 and the outermost wall 85 provided on the outer circumference. The main body 81 is formed with a large number of exhaust gas passages 820 that are surrounded by the inner wall 82 and extend in the front-rear direction.
【０００４】このハニカム構造体８を製造するに当たっ
ては，通常，セラミック粉末とバインダーとよりなる混
練物をハニカム成形用金型を用いて押出すことにより成
形する。従来のハニカム成形用金型９は，図１２，図１
３に示すごとく，上記ハニカム構造体８の内壁８１及び
最外壁８５を成形するためのスリット型１０と，該スリ
ット型１０に上記混練物を圧入するためのキリ穴９１
（図１３）を有する圧入ダイス９０とよりなる。In manufacturing the honeycomb structure 8, a kneaded product of ceramic powder and a binder is usually extruded by using a honeycomb forming die. A conventional honeycomb molding die 9 is shown in FIGS.
As shown in FIG. 3, a slit die 10 for forming the inner wall 81 and the outermost wall 85 of the honeycomb structure 8 and a drill hole 91 for press-fitting the kneaded material into the slit die 10.
(FIG. 13).
【０００５】尚，ハニカム成形用金型９は，外型９０１
と中型９０２とを組み合わせて構成してある。符号１９
は，これらの２つの型９０１，９０２を固定するための
ボルト穴であり，符号１８は，ハニカム成形用金型９を
別途設けたスクリュー押出機等に固定するためのボルト
穴である。The honeycomb molding die 9 is composed of an outer die 901.
And a medium size 902 are combined. Code 19
Is a bolt hole for fixing these two molds 901 and 902, and reference numeral 18 is a bolt hole for fixing the honeycomb molding die 9 to a screw extruder or the like separately provided.
【０００６】そして，上記構成のハニカム成形用金型９
を用いて，実際にハニカム構造体８を成形するに当たっ
ては，圧入ダイス９０に対して，混練物をスクリュー押
出機等によって送り込む。これにより，混練物は，圧入
ダイス９０のキリ穴９１を介してスリット型１０に押出
され，スリット形状に沿ってハニカム構造体８が成形さ
れる。成形されたハニカム構造体８は，その後所望の長
さに切断されると共に乾燥され，製品化される。[0006] The honeycomb molding die 9 having the above structure
When the honeycomb structure 8 is actually formed by using, the kneaded product is fed into the press-fitting die 90 by a screw extruder or the like. As a result, the kneaded product is extruded into the slit mold 10 through the drill hole 91 of the press-fitting die 90, and the honeycomb structure 8 is formed along the slit shape. The formed honeycomb structure 8 is then cut into a desired length, dried, and commercialized.
【０００７】[0007]
【解決しようとする課題】しかしながら，上記従来のハ
ニカム成形用金型及びハニカム構造体の成形方法におい
ては，次の問題がある。即ち，後述する図１０に示すご
とく，上記ハニカム成形用金型９により成形した従来の
ハニカム構造体８９は，乾燥後に変形することがある。
具体的には，例えば所望の外形が正方形である場合に，
スリットの外形の形状を正方形に設けてあっても，ハニ
カム構造体を押出して乾燥処理することにより，正方形
の各辺の中央部分８５２が内方へ凹み，頂点部８５１が
突出したような形に変形する。However, the above-mentioned conventional honeycomb molding die and method for forming a honeycomb structure have the following problems. That is, as shown in FIG. 10 described later, the conventional honeycomb structure 89 formed by the honeycomb forming die 9 may be deformed after being dried.
Specifically, for example, when the desired outer shape is a square,
Even if the outer shape of the slit is provided in a square shape, by extruding the honeycomb structure and performing a drying process, the central portion 852 of each side of the square is recessed inward and the apex 851 is projected. Deform.
【０００８】このように，ハニカム構造体の外形が変形
し，所望の形状が得られなかった場合には，上記フィル
ター９９作製等の段階において，組付け不良等の様々な
問題が生じる。そのため，外形が大きく変形したハニカ
ム構造体は，製品として使用することができない。As described above, when the outer shape of the honeycomb structure is deformed and the desired shape cannot be obtained, various problems such as improper assembly occur at the stage of manufacturing the filter 99 and the like. Therefore, the honeycomb structure whose outer shape is greatly deformed cannot be used as a product.
【０００９】本発明は，かかる従来の問題点に鑑みてな
されたもので，押出し成形後乾燥時における変形を防止
することができる，ハニカム構造体の成形用金型を提供
しようとするものである。The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a mold for molding a honeycomb structure capable of preventing deformation during extrusion and drying during drying. .
【００１０】[0010]
【課題の解決手段】請求項１の発明は，セラミック粉末
とバインダーとよりなる混練物をハニカム構造体に押出
成形するためのハニカム成形用金型において，該ハニカ
ム成形用金型は，上記ハニカム構造体の内壁を成形する
ための格子状スリットと，該ハニカム構造体の最外壁を
成形するための外周スリットとを有するスリット型と，
上記格子状スリットに上記混練物を圧入する格子用キリ
穴と，上記外周スリットに上記混練物を圧入する外周用
キリ穴とを有する圧入ダイスとよりなり，上記格子状ス
リットの開口面積Ｇに対する，該格子状スリットに対応
する格子用キリ穴の押出面積Ｈの比率（Ｈ／Ｇ），及び
上記外周スリットの開口面積Ｐに対する，該外周スリッ
トに対応する外周用キリ穴の押出面積Ｑの比率（Ｑ／
Ｐ）は，（Ｑ／Ｐ）／（Ｈ／Ｇ）が０．９〜１．１の範
囲内にある関係を有することを特徴とするハニカム成形
用金型にある。According to a first aspect of the present invention, there is provided a honeycomb forming die for extruding a kneaded material composed of ceramic powder and a binder into a honeycomb structure, wherein the honeycomb forming die has the honeycomb structure. A slit die having a lattice-like slit for forming the inner wall of the body and an outer peripheral slit for forming the outermost wall of the honeycomb structure,
A press-fitting die having a perforation hole for a lattice for press-fitting the kneaded material into the grid-like slit and an outer-perforation hole for press-fitting the kneaded material in the outer peripheral slit, and with respect to an opening area G of the lattice-like slit, The ratio (H / G) of the extrusion area H of the perforation holes for the lattice corresponding to the lattice slit, and the ratio of the extrusion area Q of the perforation holes for the outer periphery corresponding to the outer circumferential slit to the opening area P of the outer circumferential slit ( Q /
P) is a honeycomb-molding die characterized in that (Q / P) / (H / G) is in the range of 0.9 to 1.1.
【００１１】本発明において最も注目すべきことは，上
記（Ｑ／Ｐ）／（Ｈ／Ｇ）が０．９〜１．１の範囲内に
あることである。即ち，上記比率（Ｈ／Ｇ）と比率（Ｑ
／Ｐ）とは，その差が１０％以内であってほぼ同等の関
係にあることである。一方，上記（Ｑ／Ｐ）／（Ｈ／
Ｇ）の値が上記特定の範囲内にない場合には，ハニカム
構造体が成型後の乾燥によって変形するおそれがある。What is most noticeable in the present invention is that the above (Q / P) / (H / G) is in the range of 0.9 to 1.1. That is, the ratio (H / G) and the ratio (Q
/ P) means that the difference is within 10% and that they are in substantially the same relationship. On the other hand, the above (Q / P) / (H /
If the value of G) is not within the above specific range, the honeycomb structure may be deformed by drying after molding.
【００１２】上記混練物を構成するセラミック粉末とし
ては，例えばＳｉＣ（炭化ケイ素）等を用いる。また上
記バインダーは乾燥時に上記セラミック粉末を結着させ
るものである。As the ceramic powder constituting the above kneaded material, for example, SiC (silicon carbide) or the like is used. Further, the binder binds the ceramic powder when dried.
【００１３】上記ハニカム成形用金型の上記スリット型
は，前記のごとく，上記格子状スリットと上記外周スリ
ットとを有する。そして，上記格子状スリットは，得よ
うとするハニカム構造体の内壁と同形状にしてあり，一
方上記外周スリットは，得ようとするハニカム構造体の
最外壁と同形状にしてある。勿論，成形後の乾燥による
寸法縮まり分は考慮してある。As described above, the slit die of the honeycomb molding die has the lattice slits and the outer peripheral slits. The lattice slits have the same shape as the inner wall of the honeycomb structure to be obtained, while the outer peripheral slits have the same shape as the outermost wall of the honeycomb structure to be obtained. Of course, the dimensional shrinkage due to drying after molding is taken into consideration.
【００１４】上記ハニカム成形用金型の上記圧入ダイス
は，前記のごとく，上記格子用キリ穴と外周用キリ穴と
を有する。これらのキリ穴は，それぞれ上記スリット型
における各スリットにつながるように設けてある。即
ち，上記各格子用キリ穴はそれぞれ格子状スリットの一
部に連通し，また上記各外周用キリ穴はそれぞれ外周ス
リットの一部に連通している。従って，各キリ穴の上流
側から供給された上記混練物は，各キリ穴を通ってその
キリ穴に対応するスリットにそれぞれ押出される。As described above, the press-fitting die of the honeycomb molding die has the grid hole and the outer hole. These drill holes are provided so as to connect to the slits of the slit type. That is, each of the grid holes is in communication with a part of the grid slit, and each of the outer circumference holes is in communication with a part of the outer slit. Therefore, the kneaded material supplied from the upstream side of each drill hole passes through each drill hole and is extruded into the slit corresponding to the drill hole.
【００１５】そして，上記比率（Ｈ／Ｇ）は，各格子用
キリ穴と，その格子用キリ穴に対応する格子状スリット
とにおける，それぞれの混練物の通過断面積を対比させ
て求める。即ち，比率（Ｈ／Ｇ）は，上記のごとく，上
記格子状スリットの開口面積Ｇに対する，該格子状スリ
ットに対応する格子用キリ穴の押出面積Ｈの比率であ
る。Then, the ratio (H / G) is obtained by comparing the cross-sectional areas of passage of the respective kneaded materials in each of the grid drill holes and the grid slits corresponding to the grid drill holes. That is, the ratio (H / G) is the ratio of the extrusion area H of the perforation holes for the lattice corresponding to the lattice slit to the opening area G of the lattice slit as described above.
【００１６】なお，上記比率（Ｈ／Ｇ）は，格子状スリ
ットと格子用キリ穴における，混練物の進行速度の比率
を示しているともいえる。即ち，上記比率（Ｈ／Ｇ）＝
１の場合には，格子用キリ穴を通過する混練物の進行速
度と格子状スリットを通過する混練物の進行速度が等し
いことを意味する。また，上記比率（Ｈ／Ｇ）が１未満
の場合には，格子用キリ穴よりも格子状スリットを通過
する混練物の進行速度の方が遅いことを意味し，一方，
上記比率（Ｈ／Ｇ）が１を超える場合には，その逆であ
ることを意味する。It can be said that the above ratio (H / G) indicates the ratio of the advancing speed of the kneaded material in the grid slit and the grid drilling hole. That is, the ratio (H / G) =
In the case of 1, it means that the advancing speed of the kneaded material passing through the grid hole is equal to the advancing speed of the kneaded material passing through the lattice slit. Further, when the ratio (H / G) is less than 1, it means that the speed of progress of the kneaded material passing through the lattice slit is slower than that of the slit for the lattice.
When the ratio (H / G) exceeds 1, it means the opposite.
【００１７】一方，上記比率（Ｑ／Ｐ）も上記と同様
に，各外周用キリ穴と，その外周用キリ穴に対応する外
周スリットとにおける，それぞれの混練物の通過断面積
を対比させて求める。即ち，比率（Ｑ／Ｐ）は，上記の
ごとく，上記外周スリットの開口面積Ｐに対する，該外
周スリットに対応する外周用キリ穴の押出面積Ｑの比率
である。なお，この場合も，上記比率（Ｑ／Ｐ）は，外
周スリットと外周用キリ穴における，混練物の進行速度
の比率を示しているともいえる。On the other hand, the above ratio (Q / P) is also similar to the above, by comparing the cross-sectional area of passage of each kneaded material in each outer peripheral drill hole and the outer peripheral slit corresponding to the outer peripheral drill hole. Ask. That is, the ratio (Q / P) is the ratio of the extrusion area Q of the perforated peripheral hole corresponding to the outer peripheral slit to the opening area P of the outer peripheral slit as described above. In this case as well, it can be said that the ratio (Q / P) indicates the ratio of the advancing speed of the kneaded material in the outer peripheral slit and the outer peripheral drilling hole.
【００１８】次に，本発明における作用につき説明す
る。本発明のハニカム成形用金型においては，上記（Ｑ
／Ｐ）／（Ｈ／Ｇ）の値が上記特定の範囲内に収まって
いる。即ち，上記比率（Ｈ／Ｇ）と比率（Ｑ／Ｐ）との
差が１０％以内に収まっており，ほぼ同等である。Next, the operation of the present invention will be described. In the honeycomb molding die of the present invention, the above (Q
The value of / P) / (H / G) is within the above specific range. That is, the difference between the ratio (H / G) and the ratio (Q / P) is within 10%, which is almost the same.
【００１９】このことは，上述したごとく，各キリ穴に
おける混練物の進行速度と該キリ穴に対応するスリット
における混練物の進行速度の比率が，各場所においてほ
ぼ同等であることを意味する。そのため，上記圧入ダイ
スに対して一定の速度で送りこまれた混練物は，格子状
スリット部分と外周スリット部分とにおいてもほぼ同じ
速度で押出される。This means that, as described above, the ratio of the advancing speed of the kneaded material in each drill hole to the advancing speed of the kneaded material in the slit corresponding to the drill hole is substantially equal at each location. Therefore, the kneaded material fed into the press-fitting die at a constant speed is extruded at substantially the same speed in the lattice slit portion and the outer peripheral slit portion.
【００２０】即ち，成形されてくるハニカム構造体の最
外壁と内壁とは，ほぼ同等の速度でバランス良く成形さ
れる。そのため，ハニカム構造体の各部に局部的に内部
応力，密度差等が発生することはない。それ故，乾燥後
においても局部的に変形することがなく，所望の外形形
状が得られる。That is, the outermost wall and the inner wall of the honeycomb structure to be molded are molded in good balance at substantially the same speed. Therefore, internal stress, density difference, etc. do not occur locally in each part of the honeycomb structure. Therefore, the desired outer shape can be obtained without being locally deformed even after drying.
【００２１】なお，従来においては，上記比率（Ｈ／
Ｇ），（Ｑ／Ｐ）を何ら規制していなかった。そのた
め，例えば上記格子用キリ穴と外周用キリ穴とを全て同
一径で構成した場合等には，上記比率（Ｈ／Ｇ）及び
（Ｑ／Ｐ）が大きく異なっていた。そのため，各部の押
出速度の相違により，成形後のハニカム構造体に内部応
力等が発生し，これが乾燥時に開放されて上記変形に結
びついていたと考えられる。したがって，本発明によれ
ば，上記比率（Ｈ／Ｇ）及び（Ｑ／Ｐ）を上記特定範囲
に限定することによって，従来の不具合を確実に解決す
ることができる。In the past, the above ratio (H /
G) and (Q / P) were not regulated at all. Therefore, for example, in the case where all the perforation holes for the lattice and the perforation holes for the outer periphery are configured to have the same diameter, the ratios (H / G) and (Q / P) are greatly different. Therefore, it is considered that internal stress or the like was generated in the honeycomb structure after molding due to the difference in the extrusion speed of each part, which was released during drying and was linked to the above deformation. Therefore, according to the present invention, by limiting the ratios (H / G) and (Q / P) to the specific range, it is possible to surely solve the conventional problems.
【００２２】次に，請求項２の発明のように，上記ハニ
カム構造体は，互いに直交する内壁よりなる本体部と，
該本体部の外周に設けた最外壁とよりなり，上記外周ス
リットは，Ｔ字状スリットとＬ字状スリットとよりな
り，上記Ｔ字状スリットの開口面積Ｔに対する，該Ｔ字
状スリットに対応する外周用キリ穴の押出面積Ｑ1 の比
率（Ｑ1 ／Ｔ），及び上記Ｌ字状スリットの開口面積Ｌ
に対する，該Ｌ字状スリットに対応する外周用キリ穴の
押出面積Ｑ2 の比率（Ｑ2 ／Ｌ）は，（Ｑ1 ／Ｔ）／
（Ｈ／Ｇ）及び（Ｑ2 ／Ｌ）／（Ｈ／Ｇ）が共に０．９
〜１．１の範囲内にある関係を有するようにすることが
できる。Next, according to the second aspect of the present invention, the honeycomb structure includes a main body portion having inner walls orthogonal to each other,
It is composed of an outermost wall provided on the outer periphery of the body portion, and the outer peripheral slit is composed of a T-shaped slit and an L-shaped slit, and corresponds to the T-shaped slit with respect to the opening area T of the T-shaped slit. Percentage (Q 1 / T) of the extrusion area Q 1 of the outer peripheral drilling hole and the opening area L of the L-shaped slit
The ratio (Q 2 / L) of the extrusion area Q 2 of the perforated hole for the outer periphery corresponding to the L-shaped slit is (Q 1 / T) /
Both (H / G) and (Q 2 / L) / (H / G) are 0.9
It is possible to have a relationship within the range of ~ 1.1.
【００２３】即ち，本発明におけるハニカム構造体は，
その最外壁がＴ字状部とＬ字状部とにより構成されてお
り，これを成形するスリット型の外周スリットも，上記
Ｔ字状スリットとＬ字状スリットとにより構成されてい
る。そして，上記比率（Ｑ1／Ｔ）及び比率（Ｑ2 ／
Ｌ）は，いずれも上記比率（Ｈ／Ｇ）に対して上記特定
の範囲内にあり，その差が１０％以内に収まっている。That is, the honeycomb structure of the present invention is
The outermost wall thereof is composed of a T-shaped portion and an L-shaped portion, and the outer peripheral slit of the slit type for molding this is also composed of the T-shaped slit and the L-shaped slit. Then, the ratio (Q 1 / T) and the ratio (Q 2 /
L) is in the above specific range with respect to the above ratio (H / G), and the difference is within 10%.
【００２４】これにより，上記外周スリットによって成
形されるハニカム構造体の最外壁は，Ｔ字状部もＬ字状
部も，上記格子状スリットに押出される内壁とほぼ同等
の成形速度で成形される。そのため，最外壁が上記のご
とくＴ字状部分とＬ字状部分とにより構成されている場
合においても，成形された最外壁に残留応力等が殆ど発
生せず，成型後の乾燥時における最外壁の変形を防止す
ることができる。As a result, the outermost wall of the honeycomb structure molded by the outer peripheral slits, both the T-shaped portion and the L-shaped portion, is molded at a molding speed almost equal to that of the inner wall extruded in the lattice-shaped slits. It Therefore, even when the outermost wall is composed of the T-shaped portion and the L-shaped portion as described above, residual stress or the like is hardly generated in the molded outermost wall, and the outermost wall during drying after molding is performed. Can be prevented from being deformed.
【００２５】また，上記請求項１，２記載のハニカム構
造体は，互いに直交する内壁よりなる本体部と，該本体
部の外周に設けた四角形状の最外壁とより構成すること
ができる。即ち，最外壁の形状が従来変形がおこりやす
かった四角形状であっても，その変形を確実に防止する
ことができる。The honeycomb structure according to the first and second aspects may be composed of a main body portion having inner walls orthogonal to each other and a quadrangular outermost wall provided on the outer periphery of the main body portion. That is, even if the shape of the outermost wall is a quadrangle, which has been easily deformed in the past, the deformation can be reliably prevented.
【００２６】また，ハニカム構造体の内壁を成形するた
めの格子状スリットと，該格子状スリットの最外壁を成
形するための外周スリットとを有するスリット型と，上
記格子状スリットにセラミック粉末とバインダーとより
なる混練物を圧入する格子用キリ穴と，上記外周スリッ
トに上記混練物を圧入する外周用キリ穴とを有する圧入
ダイスとよりなるハニカム成形用金型を用い，上記混練
物を上記圧入ダイスよりスリット型へ押し出した際に，
上記格子用キリ穴及び外周用キリ穴より押し出されるハ
ニカム構造体の各部分における押出速度の差は±１０％
の範囲内にあることを特徴とするハニカム構造体の成形
方法もまた新規かつ有用な技術である。Further, a slit type having a lattice slit for forming an inner wall of the honeycomb structure and an outer peripheral slit for forming an outermost wall of the lattice slit, a ceramic powder and a binder in the lattice slit. Using a honeycomb molding die comprising a press-fitting die having a perforation hole for lattice for press-fitting the kneaded material and a perforation hole for perimeter for press-fitting the kneaded material in the outer peripheral slit, When extruded from the die to the slit type,
The difference in the extrusion speed between the portions of the honeycomb structure extruded from the perforation holes for the lattice and the perforation holes for the outer periphery is ± 10%.
The method for forming a honeycomb structure characterized by being within the range is also a new and useful technique.
【００２７】上記製造方法において最も注目すべきこと
は，上記混練物を上記圧入ダイスよりスリット型へ押し
出した際に，上記格子用キリ穴及び外周用キリ穴より押
し出されるハニカム構造体の各部分における押出速度の
差が±１０％の範囲内にあることである。What is most noticeable in the above-mentioned manufacturing method is that, when the kneaded material is extruded from the press-fitting die into the slit mold, the honeycomb structure is extruded from the lattice perforation holes and the perimeter perforation holes in each part. The difference in extrusion rate is within a range of ± 10%.
【００２８】これにより，成形されるハニカム構造体の
各部が均一にバランス良く成形され，成形後の局部的に
大きな残留応力等が発生することが殆どない。そのた
め，乾燥時における変形を防止することができる。この
方法を極めて容易に実施するハニカム成形用金型とし
て，上記請求項１，２の発明にかかるハニカム成形用金
型がある。As a result, each part of the honeycomb structure to be molded is uniformly and well-balanced, and a large residual stress or the like is hardly generated locally after molding. Therefore, it is possible to prevent deformation during drying. As a honeycomb-molding die for carrying out this method extremely easily, there is a honeycomb-molding die according to the first and second aspects of the invention.
【００２９】[0029]
実施形態例１ 本発明の実施形態例にかかるハニカム成形用金型，及び
ハニカム構造体の成形方法につき，図１〜図８を用いて
説明する。本例において成形するハニカム構造体８は，
前述した図１１（ｂ）に示すごとく，互いに直交する内
壁８２よりなる本体部８１と，該本体部８１の外周に設
けた四角形状の最外壁８５とよりなる四角柱状のもので
ある。First Exemplary Embodiment A honeycomb molding die and a method for forming a honeycomb structure according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 8. The honeycomb structure 8 formed in this example is
As shown in FIG. 11B, it is a quadrangular prism having a main body 81 composed of inner walls 82 orthogonal to each other and a quadrangular outermost wall 85 provided on the outer periphery of the main body 81.
【００３０】このハニカム構造体８を成形するハニカム
成形用金型１は，図１〜図３に示すごとく，ハニカム構
造体８の内壁８２（図１１（ｂ））を成形するための格
子状スリット１１と，ハニカム構造体８の最外壁８５
（図１１（ｂ））を成形するための外周スリット１２と
を有するスリット型１０を有する。上記外周スリット１
２は，図１に示すごとく，Ｔ字状スリット１２１とＬ字
状スリット１２２とよりなる。As shown in FIGS. 1 to 3, the honeycomb molding die 1 for molding the honeycomb structure 8 has a lattice slit for molding the inner wall 82 (FIG. 11B) of the honeycomb structure 8. 11 and the outermost wall 85 of the honeycomb structure 8
A slit die 10 having an outer peripheral slit 12 for molding (FIG. 11B) is provided. The outer peripheral slit 1
As shown in FIG. 1, 2 includes a T-shaped slit 121 and an L-shaped slit 122.
【００３１】また，ハニカム成形用金型１は，図１，図
３に示すごとく，上記格子状スリット１１に混練物を圧
入する格子用キリ穴２１と，外周スリット１２に混練物
を圧入する外周用キリ穴２２とを有する圧入ダイス２を
有する。As shown in FIGS. 1 and 3, the honeycomb molding die 1 has a lattice drilling hole 21 for press-fitting the kneaded material into the grid-like slit 11 and an outer circumference for press-fitting the kneaded material into the outer peripheral slit 12. A press-fitting die 2 having a drill hole 22 is provided.
【００３２】具体的には，本例におけるハニカム成形用
金型１は，図２，図３に示すごとく，外型１０１と中型
１０２とを組み合わせて構成してある。そして，上記ス
リット型１０は，図２〜図６に示すごとく，中型１０２
の中央部に突出させてこれに直接格子状スリット１１を
設けると共に（図４，図５），上記外型１０１と組み合
わせることによって外周スリット１２を形成している
（図６）。尚，図２〜図４における符号１８はハニカム
成形用金型１を別途設けたスクリュー押出機に連結する
ためのボルト穴であり，符号１９は，外型１０１と中型
１０２とを連結固定するためのボルト穴である。Specifically, as shown in FIGS. 2 and 3, the honeycomb molding die 1 in this embodiment is constructed by combining an outer die 101 and a middle die 102. The slit mold 10 is a medium mold 102 as shown in FIGS.
The lattice-shaped slits 11 are provided directly on the central portion of the outer peripheral slit 12 (FIGS. 4 and 5), and the outer peripheral slit 12 is formed by combining with the outer die 101 (FIG. 6). 2 to 4, reference numeral 18 is a bolt hole for connecting the honeycomb molding die 1 to a screw extruder separately provided, and reference numeral 19 is for connecting and fixing the outer die 101 and the middle die 102. It is a bolt hole.
【００３３】また，図３，図６，図７に示すごとく，上
記圧入ダイス２は，上記中型１０２の上流側に設けてあ
り，多数のキリ穴２１，２２を配置してある。キリ穴２
１，２２の配置は，図７に示すごとく，規則正しく碁盤
目状に配列し，最外周に配置したものが外周用キリ穴２
２であって，これに囲まれる多数のキリ穴は格子用キリ
穴２１である。そして，外周用キリ穴２２のうち，頂点
部に位置する外周用キリ穴２２（Ｌ）がＬ字状スリット
１２２に対応するものであり，最外周部の辺部のものが
Ｔ字状スリット１２１に対応するものである。Further, as shown in FIGS. 3, 6 and 7, the press-fitting die 2 is provided on the upstream side of the middle die 102 and has a large number of drill holes 21 and 22. Drill hole 2
As shown in FIG. 7, the arrangement of 1 and 22 is regularly arranged in a grid pattern, and the outermost one is the outer peripheral drilling hole 2
2 and the many drill holes surrounded by this are the drill holes 21 for the grid. Of the outer peripheral drill holes 22, the outer peripheral drill hole 22 (L) located at the apex corresponds to the L-shaped slit 122, and the outermost peripheral hole is the T-shaped slit 121. It corresponds to.
【００３４】そして，図１に示すごとく，上記格子状ス
リット１１の開口面積Ｇに対する，該格子状スリット１
１に対応する格子用キリ穴２１の押出面積Ｈの比率（Ｈ
／Ｇ），及び上記外周スリット１２の開口面積Ｐに対す
る，該外周スリットに対応する外周用キリ穴の押出面積
Ｑの比率（Ｑ／Ｐ），Ｔ字状スリット１２２の開口面積
Ｔに対する，該Ｔ字状スリット１２２に対応する外周用
キリ穴２２の押出面積Ｑ1 の比率（Ｑ1 ／Ｔ），及び上
記Ｌ字状スリット１２１の開口面積Ｌに対する，該Ｌ字
状スリット１２１に対応する外周用キリ穴２２（Ｌ）の
押出面積Ｑ2 の比率（Ｑ2 ／Ｌ）は，次の関係になるよ
うに設定してある。Then, as shown in FIG. 1, the grid-shaped slits 1 with respect to the opening area G of the grid-shaped slits 11 are
The ratio of the extrusion area H of the grid perforation holes 21 corresponding to 1 (H
/ G), and the ratio (Q / P) of the extrusion area Q of the peripheral perforation hole corresponding to the outer peripheral slit 12 to the opening area P of the outer peripheral slit 12, and the T with respect to the opening area T of the T-shaped slit 122. The ratio (Q 1 / T) of the extrusion area Q 1 of the perforated hole 22 corresponding to the L-shaped slit 122 and the outer area corresponding to the L-shaped slit 121 with respect to the opening area L of the L-shaped slit 121. The ratio (Q 2 / L) of the extrusion area Q 2 of the drill hole 22 (L) is set to have the following relationship.
【００３５】即ち，（Ｑ1 ／Ｔ）／（Ｈ／Ｇ），（Ｑ2
／Ｌ）／（Ｈ／Ｇ），（Ｑ1 ／Ｔ）／（Ｑ2 ／Ｌ）の全
ての値が，０．９〜１．１の範囲に収まるように設定し
た。つまり，上記３つの比率（Ｈ／Ｇ），（Ｑ1 ／
Ｔ），（Ｑ2 ／Ｌ）の差が全て１０％以内に収まるよ
う，ほぼ同等の値にした。That is, (Q 1 / T) / (H / G), (Q 2
/ L) / (H / G ), all the values of (Q 1 / T) / ( Q 2 / L) is set to fall in the range of 0.9 to 1.1. That is, the above three ratios (H / G), (Q 1 /
The values of (T) and (Q 2 / L) were set to almost the same value so that all the differences were within 10%.
【００３６】次に，上記構成のハニカム成形用金型１を
用いてハニカム構造体８を成形するに当たっては，まず
セラミック粉末としてのＳｉＣ（炭化ケイ素）と，バイ
ンダーとを混練した混練物を準備する。そして，この混
練物をスクリュー式押出し機（図示略）により上記圧入
ダイス２の上流から各キリ穴２１，２２に送りこむ。Next, in forming the honeycomb structure 8 using the honeycomb forming die 1 having the above-described structure, first, a kneaded material is prepared by kneading SiC (silicon carbide) as a ceramic powder and a binder. . Then, this kneaded product is fed into each of the drill holes 21 and 22 from the upstream of the press-fitting die 2 by a screw type extruder (not shown).
【００３７】各キリ穴２１，２２に送り込まれた混練物
は，順次上記スリット型１０の格子状スリット１１及び
外周スリット１２に押出され，それぞれハニカム構造体
８の内壁８２及び最外壁８５となってハニカム構造体８
が成形されていく。The kneaded material sent into each of the drilling holes 21 and 22 is sequentially extruded into the lattice-shaped slits 11 and the outer peripheral slits 12 of the slit die 10 to become the inner wall 82 and the outermost wall 85 of the honeycomb structure 8, respectively. Honeycomb structure 8
Is being molded.
【００３８】次に，本例における作用につき説明する。
本例のハニカム成形用金型１は，上記のごとく，上記３
つの比率（Ｈ／Ｇ），（Ｑ1 ／Ｔ），（Ｑ2 ／Ｌ）が，
全て１０％の誤差範囲内に収まる関係になるよう，上記
スリット型１０及び圧入ダイス２を構成してある。この
ことは，各キリ穴２１，２２を通過する混練物の進行速
度とこれに対応するスリットを通過する混練物の進行速
度の比率がほぼ同等であり，±１０％以内の誤差範囲内
に収まっていることを意味する。そのため，上記圧入ダ
イス２の各キリ穴２１，２２に一定速度で送りこまれた
混練物は，全て上記わずかな誤差範囲内のほぼ一定の速
度で各スリット１１，１２１，１２２より押出される。Next, the operation of this example will be described.
The honeycomb molding die 1 of this example has the above-mentioned 3
Two ratios (H / G), (Q 1 / T), (Q 2 / L)
The slit die 10 and the press-fitting die 2 are configured so that they are all within the error range of 10%. This means that the ratio of the advancing speed of the kneaded material passing through each of the drill holes 21 and 22 and the advancing speed of the kneaded material passing through the corresponding slits is almost equal, and is within an error range of ± 10%. It means that Therefore, the kneaded material fed into the drill holes 21 and 22 of the press-fitting die 2 at a constant speed is all extruded from the slits 11, 121 and 122 at a substantially constant speed within the slight error range.
【００３９】即ち，成形されるハニカム構造体８の各部
分における押出し速度がほぼ同じである。そのため，成
形されたハニカム構造体８の各部分において局部的に残
留応力が残っていたり，密度が高くなっていたりするこ
とが殆どない。そのため，図８に示すごとく，ハニカム
構造体８を成形後乾燥させた場合に，大きな変形を引き
起こすことなく，四角形状の外形が保たれる。That is, the extrusion speeds in the respective parts of the honeycomb structure 8 to be formed are substantially the same. Therefore, residual stress does not locally remain in each part of the formed honeycomb structure 8 and the density is hardly increased. Therefore, as shown in FIG. 8, when the honeycomb structure 8 is dried after being molded, the rectangular outer shape is maintained without causing a large deformation.
【００４０】実施形態例２ 本例においては，実施形態例１に示したハニカム成形用
金型１と従来のハニカム成形用金型９とを用いて，成形
したハニカム構造体８の形状を比較した具体例を示す。Embodiment 2 In this embodiment, the shapes of the honeycomb structures 8 formed by using the honeycomb molding die 1 shown in Embodiment 1 and the conventional honeycomb molding die 9 were compared. A specific example is shown.
【００４１】本例のハニカム成形用金型１における，格
子状スリット，Ｔ字状スリット，Ｌ字状スリットの各開
口面積Ｇ，Ｔ，Ｌと，これらにそれぞれ対応するキリ穴
の押出面積Ｈ，Ｑ1 ，Ｑ2 と，これらの比率（Ｈ／
Ｇ），（Ｑ1 ／Ｔ），（Ｑ1 ／Ｔ）の値等を表１に示
す。同様に，従来のハニカム成形用金型９における各寸
法等も表１に示す。In the honeycomb molding die 1 of this example, the opening areas G, T, and L of the lattice-shaped slits, the T-shaped slits, and the L-shaped slits, and the extrusion areas H of the perforated holes respectively corresponding thereto, Q 1 and Q 2 and their ratio (H /
Table 1 shows the values of G), (Q 1 / T), and (Q 1 / T). Similarly, Table 1 also shows dimensions and the like of the conventional honeycomb molding die 9.
【００４２】表１及び前述した図１に示すごとく，本例
のハニカム成形用金型１においては，上記３つの比率を
全て同じにし，１．４７に統一した。つまり，各スリッ
トの開口面積Ｇ，Ｔ，Ｌに対応させて各キリ穴の押出面
積Ｈ，Ｑ1 ，Ｑ2 を変化させた。As shown in Table 1 and FIG. 1 described above, in the honeycomb molding die 1 of this example, the above three ratios were all the same and unified to 1.47. That is, the extrusion areas H, Q 1 and Q 2 of the drill holes were changed in correspondence with the opening areas G, T and L of the slits.
【００４３】一方，従来のハニカム成形用金型９は，表
１及び図７に示すごとく，全てのキリ穴の押出面積Ｒを
全て同じにし，１．７６ｍｍ2 に統一した。その結果，
上記３つの比率は，１．４〜２．３の範囲で大きくばら
ついている。また，３つの比率の差異を格子状スリット
部の位置っを基準（１．０）として考えると，表１に示
すごとく，本例の場合は全て同じであり，一方比較例の
場合は１．２１〜１．５４，つまり約２０〜５０％の誤
差範囲でばらついている。On the other hand, in the conventional honeycomb molding die 9, as shown in Table 1 and FIG. 7, the extrusion areas R of all the perforation holes are all the same and unified to 1.76 mm 2 . as a result,
The above three ratios greatly vary within the range of 1.4 to 2.3. Further, when considering the difference of the three ratios with the position of the grid-like slit portion as a reference (1.0), as shown in Table 1, in the case of this example, all are the same, while in the case of the comparative example, 1. 21 to 1.54, that is, within an error range of about 20 to 50%.
【００４４】このような構成のハニカム成形用金型１及
びハニカム成形用金型９を用いて押出したハニカム構造
体８の乾燥後の外形形状は，それぞれ次のようになっ
た。まず，本例の上記３つの比率が一定のハニカム成形
用金型１で押出したハニカム構造体８は，前述した図８
と同様に，特に大きく変形することなく，きれいな四角
形状が保たれていた。The outer shape of the honeycomb structure 8 extruded using the honeycomb molding die 1 and the honeycomb molding die 9 having the above-mentioned structures after drying was as follows. First, the honeycomb structure 8 extruded by the honeycomb molding die 1 in which the above three ratios in this example are constant is the same as that shown in FIG.
Like the above, the shape of the square was kept beautiful without any significant deformation.
【００４５】一方，図１０に示すごとく，比較例の上記
３つの比率が大きくばらついているハニカム成形用金型
９を用いて成形したハニカム構造体８９は，四角形の各
頂点８５１が突出し，各辺の中央部８５２が凹んだよう
な形状に変形した。このことから，上記のごとく，キリ
穴の押出面積とこれに対応するスリットの開口面積との
比を一定にすることにより，ハニカム構造体の乾燥時の
変形を十分に防止することができることがわかる。On the other hand, as shown in FIG. 10, in the honeycomb structure 89 molded using the honeycomb molding die 9 in which the above-mentioned three ratios of the comparative example greatly vary, each vertices 851 of the quadrangle are projected and each side is The central portion 852 of the above was deformed into a concave shape. From this, it can be seen that, as described above, the deformation of the honeycomb structure during drying can be sufficiently prevented by keeping the ratio of the extrusion area of the drilled hole and the opening area of the slit corresponding thereto constant. .
【００４６】[0046]
【表１】 [Table 1]
【００４７】[0047]
【発明の効果】上記のごとく，本発明によれば，押出し
成形後乾燥時における変形を防止することができる，ハ
ニカム構造体の成形用金型を提供することができる。As described above, according to the present invention, it is possible to provide a mold for molding a honeycomb structure capable of preventing deformation during extrusion and drying during drying.
【図１】実施形態例１のハニカム成形用金型における，
スリット形状とキリ穴径との関係を示す説明図。FIG. 1 is a plan view of a honeycomb molding die according to a first embodiment,
Explanatory drawing which shows the relationship between a slit shape and a hole diameter.
【図２】実施形態例１のハニカム成形用金型の平面図。FIG. 2 is a plan view of a honeycomb molding die according to the first embodiment.
【図３】実施形態例１のハニカム成形用金型の一部切欠
き断面図。FIG. 3 is a partially cutaway cross-sectional view of the honeycomb molding die according to the first embodiment.
【図４】実施形態例１のハニカム成形用金型にかかる，
中型の平面図。FIG. 4 relates to the honeycomb molding die of Embodiment 1;
FIG.
【図５】実施形態例１のハニカム成形用金型にかかる，
中型の正面図。FIG. 5 is related to the honeycomb molding die of Embodiment 1;
Medium front view.
【図６】実施形態例１のハニカム成形用金型にかかる，
スリット及びキリ穴の構造を示す説明図。FIG. 6 relates to a honeycomb molding die according to Embodiment 1.
Explanatory drawing which shows the structure of a slit and a drill hole.
【図７】実施形態例１のハニカム成形用金型にかかる，
キリ穴の配列を示す，図６のＡ−Ａ線矢視断面図。FIG. 7 is related to the honeycomb molding die of Embodiment 1;
FIG. 7 is a cross-sectional view taken along the line AA of FIG. 6 showing an array of drill holes.
【図８】実施形態例１における，ハニカム構造体の乾燥
後の形状を示す説明図。FIG. 8 is an explanatory view showing the shape of the honeycomb structure after drying in the first embodiment.
【図９】実施形態例２の比較例における，ハニカム成形
用金型の，スリット形状とキリ穴径との関係を示す説明
図。FIG. 9 is an explanatory view showing the relationship between the slit shape and the drill hole diameter of the honeycomb molding die in the comparative example of the second embodiment.
【図１０】実施形態例２の比較例における，のハニカム
構造体の乾燥後の形状を示す説明図。FIG. 10 is an explanatory view showing the shape of the honeycomb structure after being dried in the comparative example of the second embodiment.
【図１１】従来例における，（ａ）フィルターの外観，
（ｂ）ハニカム構造体，を示す説明図。FIG. 11 (a) is a filter appearance in a conventional example,
(B) Explanatory drawing which shows a honeycomb structure.
【図１２】従来例のハニカム成形用金型の平面図。FIG. 12 is a plan view of a conventional honeycomb molding die.
【図１３】従来例のハニカム成形用金型の一部切欠き断
面図。FIG. 13 is a partially cutaway cross-sectional view of a conventional honeycomb molding die.
１．．．ハニカム成形用金型， １０．．．スリット型， １１．．．格子状スリット， １２．．．外周スリット， １２１．．．Ｌ字状スリット， １２２．．．Ｔ字状スリット， ２．．．圧入ダイス， ２１．．．格子用キリ穴， ２２．．．外周スリット， 1. . . 10. Honeycomb molding die, . . Slit type, 11. . . Lattice slits, 12. . . Peripheral slit, 121. . . L-shaped slit, 122. . . T-shaped slit, 2. . . Press-fitting die, 21. . . Drilled holes for the grid, 22. . . Perimeter slit,
Claims (2)
混練物をハニカム構造体に押出成形するためのハニカム
成形用金型において，該ハニカム成形用金型は，上記ハ
ニカム構造体の内壁を成形するための格子状スリット
と，該ハニカム構造体の最外壁を成形するための外周ス
リットとを有するスリット型と，上記格子状スリットに
上記混練物を圧入する格子用キリ穴と，上記外周スリッ
トに上記混練物を圧入する外周用キリ穴とを有する圧入
ダイスとよりなり，上記格子状スリットの開口面積Ｇに
対する，該格子状スリットに対応する格子用キリ穴の押
出面積Ｈの比率（Ｈ／Ｇ），及び上記外周スリットの開
口面積Ｐに対する，該外周スリットに対応する外周用キ
リ穴の押出面積Ｑの比率（Ｑ／Ｐ）は，（Ｑ／Ｐ）／
（Ｈ／Ｇ）が０．９〜１．１の範囲内にある関係を有す
ることを特徴とするハニカム成形用金型。1. A honeycomb molding die for extruding a kneaded material composed of ceramic powder and a binder into a honeycomb structure, wherein the honeycomb molding die forms an inner wall of the honeycomb structure. A slit die having a lattice slit and an outer peripheral slit for forming the outermost wall of the honeycomb structure, a perforation hole for a lattice for press-fitting the kneaded product into the lattice slit, and the kneaded product in the outer peripheral slit. A press-fitting die having an outer peripheral hole for press-fitting, and a ratio (H / G) of an extrusion area H of the lattice hole corresponding to the lattice slit to an opening area G of the lattice slit, and The ratio (Q / P) of the extrusion area Q of the perforated hole for the outer periphery corresponding to the opening area P of the outer peripheral slit is (Q / P) /
(H / G) has a relationship of being in the range of 0.9 to 1.1.
は，互いに直交する内壁よりなる本体部と，該本体部の
外周に設けた最外壁とよりなり，上記外周スリットは，
Ｔ字状スリットとＬ字状スリットとよりなり，上記Ｔ字
状スリットの開口面積Ｔに対する，該Ｔ字状スリットに
対応する外周用キリ穴の押出面積Ｑ1 の比率（Ｑ1 ／
Ｔ），及び上記Ｌ字状スリットの開口面積Ｌに対する，
該Ｌ字状スリットに対応する外周用キリ穴の押出面積Ｑ
2 の比率（Ｑ2 ／Ｌ）は，（Ｑ1 ／Ｔ）／（Ｈ／Ｇ）及
び（Ｑ2 ／Ｌ）／（Ｈ／Ｇ）が共に０．９〜１．１の範
囲内にある関係を有することを特徴とするハニカム成形
用金型。2. The honeycomb structure according to claim 1, wherein the honeycomb structure includes a main body portion having inner walls orthogonal to each other, and an outermost wall provided on an outer periphery of the main body portion, and the outer peripheral slit includes:
The ratio of the extrusion area Q 1 of the perforated hole corresponding to the T-shaped slit to the opening area T of the T-shaped slit, which is composed of a T-shaped slit and an L-shaped slit (Q 1 /
T) and the opening area L of the L-shaped slit,
Extrusion area Q of the outer peripheral hole corresponding to the L-shaped slit
2 ratio (Q 2 / L) is in the range of (Q 1 / T) / ( H / G) and (Q 2 / L) / ( H / G) are both 0.9 to 1.1 A mold for forming a honeycomb, which has a relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13143096A JP3750191B2 (en) | 1996-04-26 | 1996-04-26 | Honeycomb mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13143096A JP3750191B2 (en) | 1996-04-26 | 1996-04-26 | Honeycomb mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09290413A true JPH09290413A (en) | 1997-11-11 |
| JP3750191B2 JP3750191B2 (en) | 2006-03-01 |
Family
ID=15057782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13143096A Expired - Lifetime JP3750191B2 (en) | 1996-04-26 | 1996-04-26 | Honeycomb mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3750191B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026472A1 (en) * | 2002-09-05 | 2004-04-01 | Ngk Insulators, Ltd. | Honeycomb structure, and honeycomb structure forming mouthpiece |
| EP1470861A2 (en) * | 2003-04-21 | 2004-10-27 | Ngk Insulators, Ltd. | Honeycomb filter, its manufacturing, exhaust gas purification system, die for forming said honeycomb |
| WO2006101026A1 (en) * | 2005-03-22 | 2006-09-28 | Ngk Insulators Ltd. | Honeycomb structure and method of manufacturing the same |
-
1996
- 1996-04-26 JP JP13143096A patent/JP3750191B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026472A1 (en) * | 2002-09-05 | 2004-04-01 | Ngk Insulators, Ltd. | Honeycomb structure, and honeycomb structure forming mouthpiece |
| US7678439B2 (en) | 2002-09-05 | 2010-03-16 | Ngk Insulators, Inc. | Honeycomb structure and die for forming honeycomb structure |
| EP1470861A2 (en) * | 2003-04-21 | 2004-10-27 | Ngk Insulators, Ltd. | Honeycomb filter, its manufacturing, exhaust gas purification system, die for forming said honeycomb |
| EP1470861A3 (en) * | 2003-04-21 | 2006-09-20 | Ngk Insulators, Ltd. | Honeycomb filter, its manufacturing, exhaust gas purification system, die for forming said honeycomb |
| US7276101B2 (en) | 2003-04-21 | 2007-10-02 | Ngk Insulators, Ltd. | Honeycomb structure, method of manufacturing the same, die for forming, and discharge fluid purification system |
| US7503957B2 (en) | 2003-04-21 | 2009-03-17 | Ngk Insulators, Ltd. | Honeycomb structure, method of manufacturing the same, die for forming, and discharge fluid purification system |
| WO2006101026A1 (en) * | 2005-03-22 | 2006-09-28 | Ngk Insulators Ltd. | Honeycomb structure and method of manufacturing the same |
| JP2006263947A (en) * | 2005-03-22 | 2006-10-05 | Ngk Insulators Ltd | Honeycomb structure and its manufacturing method |
| EP1862279A1 (en) * | 2005-03-22 | 2007-12-05 | Ngk Insulators, Ltd. | Honeycomb structure and method of manufacturing the same |
| US7601195B2 (en) | 2005-03-22 | 2009-10-13 | Ngk Insulators, Ltd. | Honeycomb structure and method of manufacturing the same |
| JP4511396B2 (en) * | 2005-03-22 | 2010-07-28 | 日本碍子株式会社 | Honeycomb structure and manufacturing method thereof |
| EP1862279A4 (en) * | 2005-03-22 | 2011-08-17 | Ngk Insulators Ltd | Honeycomb structure and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3750191B2 (en) | 2006-03-01 |
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