JP3121408B2 - Extrusion molding die for honeycomb structure and method for manufacturing the same - Google Patents
Extrusion molding die for honeycomb structure and method for manufacturing the sameInfo
- Publication number
- JP3121408B2 JP3121408B2 JP03325087A JP32508791A JP3121408B2 JP 3121408 B2 JP3121408 B2 JP 3121408B2 JP 03325087 A JP03325087 A JP 03325087A JP 32508791 A JP32508791 A JP 32508791A JP 3121408 B2 JP3121408 B2 JP 3121408B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- die
- groove
- honeycomb structure
- forming
- 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.)
- Expired - Fee Related
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
Description
【０００１】[0001]
【産業上の利用分野】本発明はセラミックハニカム構造
体を押出成形するための押出成形用ダイスに関し、特に
ダイス抵抗を小さくし、薄肉成形体の成形を容易に行え
る押出成形用ダイスに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion die for extruding a ceramic honeycomb structure, and more particularly to an extrusion die capable of reducing a die resistance and easily forming a thin-walled molded product.
【０００２】[0002]
【従来の技術】自動車の排気ガスの浄化用の触媒担体と
してセラミックハニカム構造体が用いられ、このハニカ
ム構造体は押出成形法によって製造される。しかし、最
近触媒性能を高めるためハニカム構造体の比表面積を大
きくする要求があり、そのためハニカム構造体の隔壁の
厚さを薄く且つセル数を多くする必要があった。2. Description of the Related Art A ceramic honeycomb structure is used as a catalyst carrier for purifying automobile exhaust gas, and this honeycomb structure is manufactured by an extrusion molding method. However, recently, there has been a demand for increasing the specific surface area of the honeycomb structure in order to enhance the catalyst performance. Therefore, it has been necessary to reduce the thickness of the partition walls of the honeycomb structure and increase the number of cells.
【０００３】ところで押出成形用のダイスはセラミック
材料をダイス中に均一に流動させるために押出機より原
料が供給される成形材料供給部と成形材料を押出す成形
溝部との間に成形材料流通部が設けられており、精度を
高めるために成形溝をメッキにより形成したり（特開昭
５５−１４０５１４号）或いは成形溝が成形坏土により
摩耗した場合には摩耗したメッキ層を化学的に溶解除去
した後、再メッキして所定の成形溝に復元すること（特
開昭５５−１４０５１５号）が知られている。[0003] The die for extrusion molding has a molding material distribution section between a molding material supply section to which a raw material is supplied from an extruder and a molding groove section for extruding the molding material in order to uniformly flow the ceramic material into the die. In order to improve the accuracy, the forming groove is formed by plating (Japanese Patent Laid-Open No. 55-140514), or when the forming groove is worn by the forming clay, the worn plating layer is chemically dissolved. It is known that, after the removal, it is re-plated and restored to a predetermined molding groove (JP-A-55-140515).
【０００４】しかし、このような方法によれば押出成形
用ダイスの成形溝部分は精度高く仕上げることが可能で
あるが、成形坏土が成形流通部より成形溝に押出される
とき成形坏土は成形流通部に滞留し押出ダイス抵抗が大
きいという欠点があった。However, according to such a method, the forming groove portion of the extrusion die can be finished with high precision. However, when the forming clay is extruded into the forming groove from the forming distribution section, the forming clay is There is a drawback that the extrusion die resistance is large due to stagnation in the molding distribution section.
【０００５】[0005]
【発明が解決しようとする課題】そこで、本発明者は上
記の欠点を改善し、押出ダイス抵抗を小さくし、薄肉状
のハニカム構造体を容易に成形できる押出成形ダイスに
ついて種々検討した結果、本発明を完成したもので、本
発明の目的は薄肉状のハニカム構造体を高精度で容易に
成形できる押出成形用ダイスを提供するにある。Accordingly, the present inventor has studied various extrusion molding dies which can improve the above-mentioned disadvantages, reduce the extrusion die resistance, and can easily form a thin-walled honeycomb structure. An object of the present invention is to provide an extrusion die capable of easily forming a thin-walled honeycomb structure with high precision.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は成形材料
供給部、成形材料流動部及び成形溝部とからなるハニカ
ム構造体の押出成型用ダイスにおいて、前記成形溝部の
排出側の溝巾を成形流動部側の溝巾より狭くしたことを
特徴とするハニカム構造体の押出成形用ダイスである。
そして、この押出成形用ダイスの製作方法としてはダイ
ス切断用ワイヤを使用し、その角度を調整して排出側の
溝巾を成形流動部側の溝巾より狭くした溝を形成する。SUMMARY OF THE INVENTION The gist of the present invention is to provide an extrusion die for a honeycomb structure comprising a molding material supply section, a molding material flowing section and a molding groove section. An extrusion die for a honeycomb structure, which is narrower than a groove width on a flow portion side.
As a method of manufacturing the extrusion molding die, a die cutting wire is used, and an angle thereof is adjusted to form a groove in which the width of the groove on the discharge side is smaller than the width of the groove on the forming flow portion.
【０００７】すなわち、本発明においては、成形溝の構
造が成形流動部側の溝巾が広く排出端部の溝巾が狭くな
っており、押出機側よりみて所謂Ｖ字型構造を呈してい
るので成形坏土は成形溝部での抵抗が増大することな
く、スム−スに押出成形されることとなる。That is, in the present invention, the structure of the forming groove has a wide groove width on the forming flow portion side and a narrow groove width on the discharge end portion, and has a so-called V-shaped structure as viewed from the extruder side. Therefore, the formed clay is extruded smoothly without increasing the resistance in the forming groove.
【０００８】次に本発明について更に詳細に説明する。
本発明の成形ダイスは押出機側より成形材料供給、成形
材料流動部及び成形溝部の三つ部材よりなっており、こ
れらの部材は相互に適当な固着手段によって固定されて
押出成形ダイスを構成している。押出成形ダイスの成形
溝は、成形溝部の排出側の溝巾を成形流動部側の溝巾よ
り狭く、また、排出端縁部側において少なくとも一部ス
トレ−ト部分を有することが好ましく、ストレ−ト部分
を有することによって押出されるハニカム構造体の寸法
をより高精度をもって押出成形することができる。ま
た、本発明における成形ダイスは全て耐摩耗性の金属メ
ッキ層を有することが好ましく、かかる構造とすること
によって容易に復元可能とすることができる。Next, the present invention will be described in more detail.
The molding die of the present invention is composed of three members, a molding material supply, a molding material flowing portion and a molding groove portion from the extruder side, and these members are mutually fixed by appropriate fixing means to constitute an extrusion molding die. ing. Preferably, the forming groove of the extrusion die has a narrower width on the discharge side of the forming groove portion than the groove width on the forming flow portion side, and has at least a part of a straight portion on the discharge end edge side. By having the honeycomb portion, the dimensions of the honeycomb structure to be extruded can be extruded with higher precision. Further, it is preferable that all of the forming dies in the present invention have a wear-resistant metal plating layer, and such a structure can be easily restored.
【０００９】図面を持って本発明を具体的に説明すると
図１は成形ダイスの断面図、図２はその成形溝部の拡大
図である。図面において、第１の金属部材２によって成
形溝３と該成形溝に連通して成形流動部４がそれぞれ機
械加工されている。また、第２の金属部材５にはセラミ
ック成形材料である坏土が押出成形機によって供給され
る成形材料供給部６が設けられており、この供給孔は貫
通孔でその直径は流通路４よりも大きく、且つ成形溝３
の格子の交点の中心に設けられている。そして、第１の
金属部材２と第２の金属部材５とは接合層７によって接
合されてハニカム構造体の押出成形用ダイス１を形成し
ている。FIG. 1 is a sectional view of a forming die, and FIG. 2 is an enlarged view of a forming groove portion. In the drawing, a forming groove 3 and a forming flow portion 4 are machined by a first metal member 2 so as to communicate with the forming groove. Further, the second metal member 5 is provided with a molding material supply unit 6 through which the kneaded clay as a ceramic molding material is supplied by an extrusion molding machine. Is large and the forming groove 3
Is provided at the center of the intersection of the lattices. Then, the first metal member 2 and the second metal member 5 are joined by the joining layer 7 to form the extrusion die 1 for the honeycomb structure.
【００１０】ところで、本発明における成形溝部の溝巾
は、通常この種の押出成形用ダイスの寸法と異ならず、
約０．２〜１．０ｍｍ程度である。そして、本発明にお
いては、先に述べたように押出機側よりみてＶ字型の形
状を有し、排出端縁部の溝巾よりも成形材料流動部側の
溝巾は大きく、その差は成形するハニカム構造体の大き
さにより多少異なるが、少なくとも０．１ｍｍ以上は大
きなテ−パ−状の構造を有することが好ましく、また、
ストレ−ト部分の寸法としては成形溝の全体の約１／６
〜１／３程度、好ましくは約１／４程度である。このハ
ニカム構造体の成形用ダイスの製造方法について述べ
る。Incidentally, the groove width of the molding groove in the present invention usually does not differ from the size of this type of extrusion die.
It is about 0.2 to 1.0 mm. And, in the present invention, as described above, it has a V-shape when viewed from the extruder side, and the groove width on the molding material flow portion side is larger than the groove width on the discharge edge, and the difference is Although it differs somewhat depending on the size of the honeycomb structure to be formed, it is preferable that at least 0.1 mm or more has a large tapered structure,
The dimension of the straight part is about 1/6 of the whole molding groove.
About 1/3, preferably about 1/4. A method for manufacturing a die for forming the honeycomb structure will be described.
【００１１】従来、ハニカム構造体の成形用ダイスの製
造方法としては、例えば、特公昭６２−３６８４７号に
示されているようにダイス基体上にセルブロックが固着
され、隣接する各セルブロック間の空隙によって所望の
ハニカム形状に対応する成形溝が形成されている。しか
しながらこのような製造方法では本発明にかかる排出側
の溝幅が成形流動側の溝幅より狭い構造を有し、且つ、
セル数が１７０／ｉｎ2（平方インチ）以上の成形用ダ
イスを製造することは困難である。Conventionally, as a method of manufacturing a die for forming a honeycomb structure, for example, as shown in Japanese Patent Publication No. 62-36847, a cell block is fixed on a die substrate, and a space between adjacent cell blocks is formed. A molding groove corresponding to a desired honeycomb shape is formed by the gap. However, such a manufacturing method has a structure in which the groove width on the discharge side according to the present invention is smaller than the groove width on the molding flow side, and
It is difficult to manufacture a molding die having a cell number of 170 / in 2 (square inch) or more.
【００１２】本発明では、上記の構造を有する成形用ダ
イスの製造方法としてダイス切断用ワイヤを用いて成形
する。すなわち、ダイス切断用ワイヤを用いてその角度
を種々設定して所望のスリット構造になるようにする。
また、ダイス先端部にストレ−ト部を有する場合には、
予めストレ−ト構造を有するスリットを設け、続いてダ
イス切断用ワイヤを用いて溝幅の広い部分を形成し、所
謂押出側より見てＶ字型スリット構造に仕上がるのであ
る。In the present invention, as a method for producing a molding die having the above structure, the molding is performed using a die cutting wire. That is, the angle is set variously using a die cutting wire so that a desired slit structure is obtained.
If the die has a straight part at the tip,
A slit having a straight structure is provided in advance, and then a portion having a wide groove width is formed by using a die cutting wire, so that a V-shaped slit structure is obtained when viewed from a so-called extrusion side.
【００１３】次に本発明に係るハニカム構造体の押出成
形用ダイスの一例を示す。ＳｉＣハニカム成形体の外径
が１４０ｍｍ、長さは１５０ｍｍであり、セル数は１７
０／平方インチ（ｉｎ2）セル壁圧は０．２ｍｍ、気孔
径１０μｍ、気孔率５０％である場合、その成形ダイス
のスリット部分の構造としては、全長５ｍｍ、そのうち
最先端部の１ｍｍはストレ−ト構造と構成しており、残
り４ｍｍの長さは先端例のスリット巾が０．２ｍｍ、供
給剤のスリット巾は０．２５ｍｍであってテ−パ−構造
を示している。この成形ダイスを作製する方法として
は、先ず、従来法にしたがって全長５ｍｍのスリット部
を製作する。続いて直径１．５ｍｍダイス切断用ワイヤ
でを用いて上記のような構造になるように前記ワイヤ角
度を設定して順次仕上げ加工することによって作製する
ことができた。Next, an example of a die for extruding a honeycomb structure according to the present invention will be described. The outer diameter of the SiC honeycomb formed body was 140 mm, the length was 150 mm, and the number of cells was 17
When the wall pressure of a 0 / square inch (in 2 ) cell is 0.2 mm, the pore diameter is 10 μm, and the porosity is 50%, the structure of the slit portion of the forming die has a total length of 5 mm, of which 1 mm at the foremost portion is a strain. The remaining 4 mm length has a slit width of 0.2 mm in the tip example and a slit width of the supply agent of 0.25 mm, indicating a tapered structure. As a method of manufacturing this forming die, first, a slit portion having a total length of 5 mm is manufactured according to a conventional method. Subsequently, it was able to be manufactured by setting the wire angle so as to have the above-mentioned structure using a 1.5 mm diameter die cutting wire and sequentially performing finishing processing.
【００１４】[0014]
【発明の効果】以上述べたように、本発明にかかる押出
成形用金型は、その成形溝が押出機側よりみてＶ時形の
形状を有するので従来法の坏土の滞溜部分が生じ易い構
造が改善され、成形材料である坏土は押出機よりスム−
スに押出され、その結果ダイス抵抗は小さく薄肉成形体
の成形を容易にすることができる。また、この成形用ダ
イスの製造方法としてはダイス切断用ワイヤを使用する
ことによって従来のようにセルブロックを組立る等の複
雑な工程を行うこと無く、容易に精度高く製作すること
ができた。As described above, in the extrusion molding die according to the present invention, since the molding groove has a V-shape when viewed from the extruder side, a stagnant portion of the clay of the conventional method is generated. The easy-to-use structure has been improved, and
As a result, the die resistance is small and the molding of a thin molded body can be facilitated. In addition, as a method of manufacturing the molding die, a die cutting wire was used, and a complicated process such as assembling a cell block was not performed as in the related art.
【図１】本発明にかかる押出成形用ダイスの断面図FIG. 1 is a sectional view of an extrusion die according to the present invention.
【図２】成形溝部の拡大図FIG. 2 is an enlarged view of a molding groove.
１．成形用ダイス ２．第１の金属部材 ３．成形溝 ４．成形材料流動部 ５．第２の金属部材 ６．成形材料供給部 ７．接合層 1. Molding dies 2. First metal member 3. Molding groove 4. 4. Molding material flow section Second metal member 6. 6. Molding material supply section Bonding layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−131427（ＪＰ，Ａ) 特開 平２−60714（ＪＰ，Ａ) 特開 平２−52703（ＪＰ，Ａ) 特開 昭62−142607（ＪＰ，Ａ) 特開 昭56−104008（ＪＰ，Ａ) 特開 昭55−140514（ＪＰ，Ａ) 特開 平２−293103（ＪＰ，Ａ) 特開 昭55−140515（ＪＰ，Ａ) 特公 昭62−36847（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B28B 3/26 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-131427 (JP, A) JP-A-2-60714 (JP, A) JP-A-2-52703 (JP, A) JP-A-62-1987 142607 (JP, A) JP-A-56-104008 (JP, A) JP-A-55-140514 (JP, A) JP-A-2-293103 (JP, A) JP-A-55-140515 (JP, A) JP-B-62-36847 (JP, B2) (58) Field surveyed (Int. Cl. 7 , DB name) B28B 3/26
Claims (2)
溝部とからなるハニカム構造体の押出成形用ダイスにお
いて、前記成形溝部の排出側の溝巾を成形流動部側の溝
巾より狭くしたことを特徴とするハニカム構造体の押出
成形用ダイス。In a die for extrusion forming a honeycomb structure comprising a molding material supply section, a molding material flowing section and a molding groove section, a groove width on a discharge side of the molding groove section is made smaller than a groove width on a molding flow section side. A die for extruding a honeycomb structure, comprising:
溝巾より狭くしたハニカム構造体の押出成形用ダイスの
製造法において、ダイス切断用ワイヤを使用し、その角
度を調整して排出側の溝巾を成形流動部側の溝巾より狭
くした溝を形成することを特徴とするハニカム構造体の
押出成形用ダイスの製造法。2. A method for manufacturing a die for extrusion forming a honeycomb structure in which a groove width on a discharge side of a forming groove portion is narrower than a groove width on a forming flow portion side, a die cutting wire is used, and an angle thereof is adjusted. A method for producing a die for extrusion molding of a honeycomb structure, characterized in that a groove width on the discharge side is made narrower than a groove width on the molding flow portion side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03325087A JP3121408B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion molding die for honeycomb structure and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03325087A JP3121408B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion molding die for honeycomb structure and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05131426A JPH05131426A (en) | 1993-05-28 |
| JP3121408B2 true JP3121408B2 (en) | 2000-12-25 |
Family
ID=18172998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03325087A Expired - Fee Related JP3121408B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion molding die for honeycomb structure and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3121408B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085111B2 (en) * | 1992-11-26 | 1996-01-24 | 日本碍子株式会社 | Honeycomb structure manufacturing equipment |
| US5702659A (en) * | 1995-11-30 | 1997-12-30 | Corning Incorporated | Honeycomb extrusion die and methods |
| JPWO2013145151A1 (en) * | 2012-03-28 | 2015-08-03 | イビデン株式会社 | Honeycomb structure manufacturing method and extrusion mold |
| WO2013145151A1 (en) * | 2012-03-28 | 2013-10-03 | イビデン株式会社 | Method for manufacturing honeycomb structure, and extrusion die |
-
1991
- 1991-11-14 JP JP03325087A patent/JP3121408B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05131426A (en) | 1993-05-28 |
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