JP2002079510A - Mouthpiece for extrusion molding of ceramic honeycomb - Google Patents
Mouthpiece for extrusion molding of ceramic honeycombInfo
- Publication number
- JP2002079510A JP2002079510A JP2000271634A JP2000271634A JP2002079510A JP 2002079510 A JP2002079510 A JP 2002079510A JP 2000271634 A JP2000271634 A JP 2000271634A JP 2000271634 A JP2000271634 A JP 2000271634A JP 2002079510 A JP2002079510 A JP 2002079510A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- die
- clay
- ceramic clay
- forming groove
- 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.)
- Pending
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]
【発明の属する技術分野】本発明は、排気ガス浄化用の
触媒担体あるいはフィルター及び熱交換機等に用いられ
るセラミックハニカム構造体を製造するためのセラミッ
クハニカム押出用口金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic honeycomb extrusion die for producing a ceramic honeycomb structure used for a catalyst carrier or a filter for exhaust gas purification, a heat exchanger, and the like.
【０００２】[0002]
【従来の技術】従来から、セラミックハニカムの押出成
形に用いる口金としては、特公昭５５−４１９０８号公
報あるいは特公昭５７−６１５９２号公報に、一方の面
にセラミック坏土供給孔が開口し、他方の面にはセラミ
ックハニカム構造体の断面形状に対応するセラミック坏
土成形溝が開口し、該供給孔と成形溝の交差部を備えた
押出成形用口金が開示されている。このような口金を使
用し、セラミックハニカム構造体を成形する際には、セ
ラミック原料坏土をセラミック坏土供給孔から供給し、
供給孔と成形溝交差部を通過せしめ、最終的にはセラミ
ック坏土成形溝から坏土を排出させることにより、ハニ
カム構造の成形体を得ている。2. Description of the Related Art Conventionally, as a die used for extrusion molding of a ceramic honeycomb, Japanese Patent Publication No. 55-41908 or Japanese Patent Publication No. 57-61592 discloses a ceramic clay supply hole on one surface and a ceramic clay supply hole on the other surface. The extrusion die having an opening formed in the surface of the ceramic clay structure corresponding to the cross-sectional shape of the ceramic honeycomb structure and having an intersection between the supply hole and the forming groove is disclosed. Using such a die, when forming the ceramic honeycomb structure, supply the ceramic raw material clay through the ceramic clay supply hole,
The formed body having the honeycomb structure is obtained by passing the supply hole and the forming groove intersection and finally discharging the clay from the ceramic clay forming groove.
【０００３】[0003]
【発明が解決しようとする課題】従来のセラミックハニ
カムの押出成形用口金形状では、押出成形時の口金にか
かる負荷により口金自体が変形、破損する問題や、坏土
成形溝での坏土の密着不足によるハニカム構造体のセル
壁未形成やセル壁の切れ等の問題が発生する場合があっ
た。即ち、近年のハニカム構造体薄壁化に伴い、セラミ
ック原料には、その形状を維持する為の保形性が求めら
れることから、原料杯土自体に十分な硬さが求められる
ため、口金にかかる負荷が増大すると共に、坏土の流動
性や接着性が低下するため、ハニカム構造体のセル壁の
形成が難しくなるのである。In the conventional die shape for ceramic honeycomb extrusion molding, the die itself is deformed and damaged by the load applied to the die during extrusion molding, and the adhesion of the clay in the clay forming groove is caused. Insufficiency may cause problems such as a lack of a cell wall of the honeycomb structure and a cut of the cell wall. In other words, with recent honeycomb structure thinning, ceramic raw materials are required to have shape-retaining properties to maintain their shape, and therefore the raw material itself must have sufficient hardness. As the load increases and the fluidity and adhesiveness of the clay decrease, it becomes difficult to form the cell walls of the honeycomb structure.
【０００４】セラミックハニカム押出成形用口金につい
て、図面を用いて説明する。図１は押出成形用口金をセ
ラミック坏土供給側から見た図であり、押出成形用口金
１には無数のセラミック坏土供給孔２が形成されてい
る。また、その反対側は図２に示すようにセラミック坏
土成形溝３が形成されている。押出成形用口金の断面形
状は、図２のＸ−Ｘ断面として図３に示し、セラミック
坏土供給孔２はセラミック坏土成形溝３に連通してい
る。特に、その一つの連通したセラミック坏土供給孔２
とセラミック坏土成形溝３を拡大したのが図４である。[0004] A ceramic honeycomb extrusion molding die will be described with reference to the drawings. FIG. 1 is a view of the extrusion molding die as viewed from the ceramic clay supply side, and the extrusion molding die 1 has countless ceramic clay supply holes 2 formed therein. On the other side, a ceramic clay forming groove 3 is formed as shown in FIG. The cross-sectional shape of the extrusion die is shown in FIG. 3 as the XX cross section in FIG. 2, and the ceramic clay supply hole 2 communicates with the ceramic clay forming groove 3. In particular, the one connected ceramic clay supply hole 2
FIG. 4 is an enlarged view of the ceramic clay forming groove 3.
【０００５】前述した様に原料坏土の硬度が高くなる
と、この硬い原料杯土を押出すハニカム押出成形用口金
については、杯土が口金を通過する際に生じる負荷に耐
え、変形しないように口金自体の厚さを増し、口金強度
を上昇させる検討がなされてきた。しかしながら、口金
の厚さを厚くすることによって坏土供給孔の深孔加工が
必要となるため、口金の加工コストが膨大になるという
問題が発生する。一方、口金強度を上昇させる為に、坏
土供給孔径を小さくすると、ハニカム構造体のセル壁未
形成、セル壁切れといった成形上の問題が発生する。本
発明の目的は、セラミックハニカム構造体を押出成形す
るに当たり、適切なセル壁成形性と口金強度を有する押
出用口金を得ることである。[0005] As described above, when the hardness of the raw material clay increases, the honeycomb extrusion die for extruding the hard raw material clay withstands the load generated when the clay passes through the die and does not deform. Studies have been made to increase the thickness of the base itself and increase the strength of the base. However, increasing the thickness of the die requires deep hole processing of the kneaded material supply hole, which causes a problem that the processing cost of the die becomes enormous. On the other hand, if the diameter of the kneaded clay supply hole is reduced in order to increase the die strength, there is a problem in forming such that the cell wall of the honeycomb structure is not formed or the cell wall is cut. An object of the present invention is to obtain an extrusion die having suitable cell wall formability and die strength when extruding a ceramic honeycomb structure.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、押出用口
金の形状に関して、鋭意検討を行った結果、セラミック
坏土成形溝の幅に対して、ある一定範囲内の原料供給孔
径の場合に、押出成形時に口金に付加される応力に対
し、口金の変形を防止しつつ、健全なセル壁を有するセ
ラミックハニカム構造体を連続的に成形できることが判
り本発明に想到した。Means for Solving the Problems The present inventors have conducted intensive studies on the shape of the extrusion die, and found that the diameter of the raw material supply hole was within a certain range with respect to the width of the ceramic clay forming groove. Further, it has been found that the ceramic honeycomb structure having sound cell walls can be continuously formed while preventing deformation of the die against stress applied to the die during extrusion molding.
【０００７】すなわち、本発明はセラミック坏土成形溝
とこの成形溝へそれぞれ連通された複数のセラミック坏
土供給孔とを有するセラミックハニカム押出成形用口金
において、そのセラミック坏土供給孔の軸方向垂直断面
におけるセラミック坏土供給孔の単位面積当たりの開口
面積をＤIとし、セラミック坏土成形溝の軸方向垂直断
面におけるセラミック坏土成形溝の単位面積当たりの開
口面積をＤOとした時に、開口比Ｒ＝ＤI／ＤOがＲ≦
２．５であることを特徴とするセラミックハニカム押出
成形用口金である。また１．０≦Ｒであると良く、さら
に１．３≦Ｒ≦１．７であると好適である。That is, the present invention relates to a ceramic honeycomb extrusion forming die having a ceramic clay forming groove and a plurality of ceramic clay supplying holes communicating with the forming grooves, respectively. When the opening area per unit area of the ceramic clay supply hole in the cross section is DI and the opening area per unit area of the ceramic clay forming groove in the axially vertical cross section of the ceramic clay forming groove is DO, the opening ratio R = DI / DO is R ≦
It is a die for ceramic honeycomb extrusion molding, characterized by having a ratio of 2.5. Further, it is preferable that 1.0 ≦ R, and it is more preferable that 1.3 ≦ R ≦ 1.7.
【０００８】本発明のセラミックハニカム押出成形用口
金において、 開口比Ｒが１．０よりも小さいとセル形
成時のセラミック坏土に押出圧力がかかりにくく、セル
形成に必要なセラミック坏土の原料密着性を得ることが
出来ない場合があるため、ハニカム構造体のセル壁が形
性されなかったり、セル壁に切れが発生することから、
触媒担体として充分な強度を有するハニカム構造体を得
ることができないという問題があった。また、開口比Ｒ
が２．５よりも大きくなると、口金が変形、破損する可
能性が高くなる。特に好ましい開口比Ｒの範囲は、１．
３≦Ｒ≦１．７であり、この範囲内であれば適切なセル
形成が可能であり、また口金自体の変形も生じ難い。[0008] In the die for ceramic honeycomb extrusion molding of the present invention, if the opening ratio R is less than 1.0, it is difficult to apply extrusion pressure to the ceramic clay at the time of cell formation, and the raw material adhesion of the ceramic clay required for cell formation. Since it may not be possible to obtain the property, the cell wall of the honeycomb structure may not be shaped or the cell wall may be cut,
There is a problem that a honeycomb structure having sufficient strength as a catalyst carrier cannot be obtained. Also, the aperture ratio R
Is larger than 2.5, the possibility of deformation and breakage of the base increases. A particularly preferable range of the opening ratio R is as follows.
3 ≦ R ≦ 1.7, and within this range, an appropriate cell can be formed, and the base itself is unlikely to be deformed.
【０００９】[0009]
【発明の実施の形態】以下、本発明に係わるセラミック
ハニカム押出成形用口金を実際の工程に基づき説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The ceramic honeycomb extrusion die according to the present invention will be described below based on actual steps.
【００１０】図１は本発明の一例のセラミックハニカム
押出成形用口金のセラミック坏土供給孔側の平面図、図
２は本発明の一例のセラミックハニカム押出成形用口金
のセラミック坏土成形溝側の平面図、図３は図２に示す
例のＸ−Ｘ線に沿った断面を示す図、図４は本発明の一
例のセラミック坏土成形溝とセラミック坏土供給孔とを
模式的に示す断面図である。図１において、１はセラミ
ックハニカム押出成形用口金であり、２はセラミック坏
土供給孔である。図２において、３はセラミックハニカ
ム坏土成形溝である。図３において、４はトランジショ
ンゾーンと呼ばれる部分で、セラミック坏土供給孔から
供給されたセラミック坏土がセラミック坏土成形溝の形
状に成形される部分である。FIG. 1 is a plan view of a ceramic honeycomb extrusion forming die according to an example of the present invention on the side of a ceramic clay supply hole, and FIG. 2 is a view of a ceramic honeycomb extrusion forming die side of an example of the present invention. FIG. 3 is a plan view, FIG. 3 is a cross-sectional view taken along line XX of the example shown in FIG. 2, and FIG. FIG. In FIG. 1, reference numeral 1 denotes a ceramic honeycomb extrusion forming die, and reference numeral 2 denotes a ceramic clay supply hole. In FIG. 2, reference numeral 3 denotes a ceramic honeycomb clay forming groove. In FIG. 3, reference numeral 4 denotes a portion called a transition zone, which is a portion where the ceramic clay supplied from the ceramic clay supply hole is formed into a shape of a ceramic clay forming groove.
【００１１】次に、押出成形用口金の製造方法を説明し
ながら、本発明の押出成形用口金の説明を行う。まず、
押出成形用口金母材の一面に、セラミック坏土供給孔２
を加工した。その加工方法はドリルにより孔開け加工、
電極を用いた放電加工などがある。この時にセラミック
坏土供給孔の単位面積当たりの開口面積ＤIは、孔の径
から求めた面積に単位面積当たりのセラミック坏土供給
孔３の数をかけることにより求めることが出来る。Next, the extrusion die of the present invention will be described while explaining the method of manufacturing the extrusion die. First,
A ceramic clay supply hole 2 is provided on one surface of the extrusion base material.
Was processed. The processing method is drilling with a drill,
There is electric discharge machining using an electrode. At this time, the opening area DI per unit area of the ceramic clay supply hole can be obtained by multiplying the area obtained from the diameter of the hole by the number of ceramic clay supply holes 3 per unit area.
【００１２】次に、その反対の面にセラミック坏土成形
溝３を縦横にその交点に坏土供給孔３がくるように加工
した。セラミック坏土成形溝の形成方法としては、回転
砥石による研削加工、放電ワイヤを用いた放電加工など
がある。また、セラミック坏土成形溝の開口面積ＤO
は、単位面積当たりの坏土成形溝の面積から簡単に求め
られる。Next, a ceramic clay forming groove 3 was machined vertically and horizontally on the opposite surface so that the clay supply hole 3 was located at the intersection. Examples of the method for forming the ceramic clay forming groove include grinding using a rotating grindstone, electric discharge using a discharge wire, and the like. Also, the opening area DO of the ceramic clay forming groove
Can be easily obtained from the area of the clay forming groove per unit area.
【００１３】（実施例）以下、本発明に係わるセラミッ
クハニカム押出成形用口金の製造方法を実際の工程に基
づき説明する。まず、幅１３０ｍｍ、長さ１８０ｍｍ、
厚さ２０ｍｍ、硬度ＨＲＣ３３の鋼製の母材の一面に、
図２に示すように幅０．２０ｍｍ、深さ５ｍｍの坏土成
形溝３を１．３５ｍｍ間隔に縦横に形成した。単位面積
当たりの坏土成形溝の開口面積はＤOは０．２７ｍｍ2／
ｍｍ2であった。次にその反対の面に図１に示すように
ドリルを用い、深さ１５ｍｍの坏土供給孔２を１．３５
ｍｍ間隔で５２００個加工した。(Examples) Hereinafter, a method of manufacturing a ceramic honeycomb extrusion die according to the present invention will be described based on actual steps. First, width 130mm, length 180mm,
On one surface of a steel base material having a thickness of 20 mm and a hardness of HRC33,
As shown in FIG. 2, the clay forming grooves 3 having a width of 0.20 mm and a depth of 5 mm were formed vertically and horizontally at an interval of 1.35 mm. The opening area of the clay forming groove per unit area is DO of 0.27 mm 2 /
mm 2 . Next, using a drill as shown in FIG. 1 on the opposite surface, a kneaded material supply hole 2 having a depth of 15 mm was formed at 1.35.
5,200 pieces were processed at mm intervals.
【００１４】そして、表１に示すように、原料供給孔の
直径を変え、原料供給孔の単位面積当たりの開口面積を
変えた６種類の本発明例の押出用口金を製造した。その
時の各原料供給孔の場合の単位面積当たりの坏土供給孔
の開口面積ＤIを表１に示す。次に、比較のために、本
発明の開口比から外れるような原料供給孔の単位面積当
たりの開口面積となるような坏土供給孔２を形成した押
出用口金を４種類製造した。As shown in Table 1, six types of extrusion die according to the present invention were manufactured by changing the diameter of the raw material supply holes and changing the opening area per unit area of the raw material supply holes. Table 1 shows the opening area DI of the clay supply hole per unit area in the case of each raw material supply hole at that time. Next, for comparison, four types of extrusion die having the kneaded material supply holes 2 having an opening area per unit area of the raw material supply holes that deviated from the opening ratio of the present invention were manufactured.
【００１５】それぞれの押出用口金を押出成形機に装着
して、実際にハニカム構造体の成形を行った。セル成形
性の評価として、得られた成形体のセル切れやセル未形
成であるセル欠陥について、セル欠陥が発生しなかった
ものを○、セル欠陥は若干発生したが実使用上問題の無
いものを△、セル欠陥が発生したものを×で評価した。
また、成形後の口金の変形状態について、変形が発生し
なかったものを○、変形は若干発生したが成形可能であ
ったものを△、変形若しくは破損したものを×で評価し
た。これらの結果を表１に示す。Each extrusion die was attached to an extrusion molding machine, and a honeycomb structure was actually formed. As the evaluation of cell moldability, regarding the cell defects of the obtained molded body, cell defects in which no cell defects occurred or cell defects in which cells were not formed were evaluated as good. △, and those with cell defects were evaluated as ×.
Regarding the deformed state of the die after the molding, ○ indicates that no deformation occurred, △ indicates that slight deformation occurred but could be formed, and X indicates deformed or damaged. Table 1 shows the results.
【００１６】[0016]
【表１】 [Table 1]
【００１７】表１より、本発明例１から６の押出用口金
を用いると、セル欠陥の発生や口金の変形のない正常な
成形体を得ることができた。しかしながら、比較例１、
２の押出用口金を用いると、口金の変形は無かったもの
のセル欠陥が発生し、比較例３、４の押出用口金を用い
ると、口金が破損したため、ハニカム構造体の押出成形
そのものが不可能であった。即ち、健全なセル形成を行
う為には開口比Ｒは少なくとも１．０以上必要であり、
成形可能な口金強度を得る為には開口比Ｒは２．５以下
である必要があることが判る。また、さらに適切なセル
成形性と口金強度を有しているのは１．３≦Ｒ≦１．７
の場合であることが判る。As can be seen from Table 1, when the extrusion die of Examples 1 to 6 of the present invention were used, a normal molded article without generation of cell defects and deformation of the die could be obtained. However, Comparative Example 1,
When the extrusion die of No. 2 was used, there was no deformation of the die, but cell defects occurred. When the die of the extrusions of Comparative Examples 3 and 4 were used, the die was damaged, and the extrusion of the honeycomb structure itself was impossible. Met. That is, in order to form a sound cell, the aperture ratio R needs to be at least 1.0 or more,
It can be seen that the opening ratio R needs to be 2.5 or less in order to obtain a moldable die strength. In addition, 1.3 ≦ R ≦ 1.7 has more appropriate cell moldability and die strength.
It turns out that this is the case.
【００１８】そして、表１から明らかなように、本発明
の押出成形口金を用いることにより、触媒担体として充
分な強度を有する、セル壁未形成やセル壁切れのない健
全なハニカム成形体を安定して得ることの出来ることが
判る。As is clear from Table 1, by using the extrusion die of the present invention, it is possible to stably provide a sound honeycomb molded body having sufficient strength as a catalyst carrier and having no cell wall formed and no cell wall breakage. You can see that you can get it.
【００１９】[0019]
【発明の効果】セラミックハニカム押出成形に当たり、
本発明を用いることにより、適切なセル成形性と口金強
度を有する押出用口金を得ることが出来る。According to the present invention, in ceramic honeycomb extrusion molding,
By using the present invention, an extrusion die having appropriate cell moldability and die strength can be obtained.
【図１】本発明の一例のセラミックハニカム押出成形用
口金の坏土供給孔側の平面図である。FIG. 1 is a plan view of a die for ceramic honeycomb extrusion molding of an example of the present invention on the side of a clay supply hole.
【図２】本発明の一例のセラミックハニカム押出成形用
口金の成型溝側の平面図である。FIG. 2 is a plan view showing a molding groove side of a ceramic honeycomb extrusion molding die according to an example of the present invention.
【図３】図２に示す例のＸ−Ｘ線に沿った断面を示す図
である。FIG. 3 is a diagram showing a cross section taken along line XX of the example shown in FIG. 2;
【図４】図４は本発明の一例の成型溝と坏土供給孔とを
模式的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing a molding groove and a clay supply hole according to an example of the present invention.
１：口金部材、 ２：坏土供給孔、 ３：成形溝 1: die member, 2: clay supply hole, 3: forming groove
Claims (3)
れぞれ連通された複数のセラミック坏土供給孔とを有す
るセラミックハニカム押出成形用口金において、そのセ
ラミック坏土供給孔の軸方向垂直断面におけるセラミッ
ク坏土供給孔の単位面積当たりの開口面積をＤIとし、
セラミック坏土成形溝の軸方向垂直断面におけるセラミ
ック坏土成形溝の単位面積当たりの開口面積をＤOとし
た時に、開口比Ｒ＝ＤI／ＤOが１．０≦Ｒであることを
特徴とするセラミックハニカム押出成形用口金。1. A ceramic honeycomb extrusion forming die having a ceramic clay forming groove and a plurality of ceramic clay supply holes respectively communicating with the molding groove, wherein the ceramic is formed in a cross section perpendicular to the axial direction of the ceramic clay supply hole. The opening area per unit area of the kneaded material supply hole is defined as DI,
When the opening area per unit area of the ceramic clay forming groove in the axially vertical cross section of the ceramic clay forming groove is DO, the opening ratio R = DI / DO is 1.0 ≦ R. A die for honeycomb extrusion molding.
れぞれ連通された複数のセラミック坏土供給孔とを有す
るセラミックハニカム押出成形用口金において、そのセ
ラミック坏土供給孔の軸方向垂直断面におけるセラミッ
ク坏土供給孔の単位面積当たりの開口面積をＤIとし、
セラミック坏土成形溝の軸方向垂直断面におけるセラミ
ック坏土成形溝の単位面積当たりの開口面積をＤOとし
た時に、開口比Ｒ＝ＤI／ＤOがＲ≦２．５であることを
特徴とするセラミックハニカム押出成形用口金。2. A ceramic honeycomb extrusion forming die having a ceramic clay forming groove and a plurality of ceramic clay supplying holes respectively connected to the forming groove, wherein the ceramic is formed in a cross section perpendicular to the axial direction of the ceramic clay supplying hole. The opening area per unit area of the kneaded material supply hole is defined as DI,
When the opening area per unit area of the ceramic clay forming groove in the axially vertical cross section of the ceramic clay forming groove is DO, the opening ratio R = DI / DO is R ≦ 2.5. A die for honeycomb extrusion molding.
れぞれ連通された複数のセラミック坏土供給孔とを有す
るセラミックハニカム押出成形用口金において、そのセ
ラミック坏土供給孔の軸方向垂直断面におけるセラミッ
ク坏土供給孔の単位面積当たりの開口面積をＤIとし、
セラミック坏土成形溝の軸方向垂直断面におけるセラミ
ック坏土成形溝の単位面積当たりの開口面積をＤOとし
た時に、開口比Ｒ＝ＤI／ＤOが１．３≦Ｒ≦１．７であ
ることを特徴とするセラミックハニカム押出成形用口
金。3. A ceramic honeycomb extrusion die having a ceramic clay forming groove and a plurality of ceramic clay supply holes respectively connected to the molding groove, wherein the ceramic is formed in a cross section perpendicular to the axial direction of the ceramic clay supply hole. The opening area per unit area of the kneaded material supply hole is defined as DI,
When the opening area per unit area of the ceramic clay forming groove in the axially vertical cross section of the ceramic clay forming groove is DO, the opening ratio R = DI / DO is 1.3 ≦ R ≦ 1.7. Features Ceramic extrusion extrusion die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000271634A JP2002079510A (en) | 2000-09-07 | 2000-09-07 | Mouthpiece for extrusion molding of ceramic honeycomb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000271634A JP2002079510A (en) | 2000-09-07 | 2000-09-07 | Mouthpiece for extrusion molding of ceramic honeycomb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002079510A true JP2002079510A (en) | 2002-03-19 |
Family
ID=18757890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000271634A Pending JP2002079510A (en) | 2000-09-07 | 2000-09-07 | Mouthpiece for extrusion molding of ceramic honeycomb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002079510A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009119422A1 (en) * | 2008-03-28 | 2009-10-01 | 日立金属株式会社 | Die for forming ceramic honeycomb structure |
| US9889592B2 (en) | 2012-05-29 | 2018-02-13 | Corning Incorporated | Extrusion die with curved face |
-
2000
- 2000-09-07 JP JP2000271634A patent/JP2002079510A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009119422A1 (en) * | 2008-03-28 | 2009-10-01 | 日立金属株式会社 | Die for forming ceramic honeycomb structure |
| US8282385B2 (en) | 2008-03-28 | 2012-10-09 | Hitachi Metals, Ltd. | Die for molding ceramic honeycomb structure |
| JP5360051B2 (en) * | 2008-03-28 | 2013-12-04 | 日立金属株式会社 | Mold for forming ceramic honeycomb structure |
| US9889592B2 (en) | 2012-05-29 | 2018-02-13 | Corning Incorporated | Extrusion die with curved face |
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| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040702 |