JPH05131425A - Extrusion molding die of honeycomb structure - Google Patents
Extrusion molding die of honeycomb structureInfo
- Publication number
- JPH05131425A JPH05131425A JP32501191A JP32501191A JPH05131425A JP H05131425 A JPH05131425 A JP H05131425A JP 32501191 A JP32501191 A JP 32501191A JP 32501191 A JP32501191 A JP 32501191A JP H05131425 A JPH05131425 A JP H05131425A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- supply
- die
- molding die
- extrusion
- 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]
【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した押出
成形用ダイスに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for extruding a ceramic honeycomb structure, and more particularly to an extrusion molding die having a reduced die resistance and facilitating the molding of a thin-walled molded body.
【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
ム構造体は多数の孔を有する押出形成形ダイスより坏土
を押出す押出成形法によって製造されている。2. Description of the Related Art A ceramic honeycomb structure is used as a catalyst carrier for purifying exhaust gas of an automobile, and this honeycomb structure is manufactured by an extrusion molding method in which a kneaded material is extruded from an extrusion molding die having a large number of holes. ing.
【０００３】従来のハニカム構造体を押出成形に使用さ
れる押出成形ダイスは押出機により押し出された坏土を
成形溝に供給するための複数の坏土供給穴からなる坏土
供給部、供給溝を出た坏土を成形溝に均一に供給するた
めの成形流動部及び成形溝よりなっている。An extrusion molding die used for extrusion molding a conventional honeycomb structure is a kneaded clay supply portion and a supply groove formed of a plurality of kneaded clay supply holes for supplying the kneaded clay extruded by an extruder to a molding groove. It is composed of a molding fluidizing section and a molding groove for uniformly feeding the kneaded material which has exited from the molding groove.
【０００４】触媒性能を高めるためハニカム構造体の比
表面積を大きくしなければならず、そのためハニカム構
造体の隔壁の厚さはできるだけ薄くし、且つ、セル数を
多くしなければならない。しかし、ハニカム構造体の隔
壁の厚さを薄くし、且つセル数を多くするには成形材料
供給部及び成形溝のそれぞれの断面形状を小さくしなけ
ればならないが、断面形状を小さくすると成形型の耐圧
強度が低下し、押出圧力に耐えられなくなる。また、成
形型の耐圧強度を大きくするため材料供給穴長を長くす
るとダイスの抵抗が大きくなり、押出圧力を大きくしな
ければならない。In order to enhance the catalytic performance, the specific surface area of the honeycomb structure must be increased, and therefore the partition walls of the honeycomb structure must be made as thin as possible and the number of cells is increased. However, in order to reduce the thickness of the partition walls of the honeycomb structure and increase the number of cells, it is necessary to reduce the cross-sectional shape of each of the molding material supply section and the molding groove. The compressive strength is reduced and the extrusion pressure cannot be withstood. If the length of the material supply hole is increased in order to increase the pressure resistance of the molding die, the resistance of the die increases and the extrusion pressure must be increased.
【０００５】また、通常、高品質のハニカム構造体を製
造するためには複数のそれぞれの供給穴の流動抵抗を均
一にする必要があるが、押出ダイスにおける坏土供給穴
はドリル加工によって穿孔されたストレ−トな円筒形状
をなしているがダイス鋼は硬質金属のため加工性が悪
く、そのため供給穴の内周面の面粗度にバラツキが生じ
やすい。しかして流動抵抗は供給穴の面粗度に影響さ
れ、供給穴の粗面度にバラツキがあると、流動抵抗に差
を生じる。又穴径のバラツキも流動抵抗に差を生じ、そ
の結果高品質のハニカム構造体を製造できないという欠
点があった。Generally, in order to manufacture a high-quality honeycomb structure, it is necessary to make the flow resistance of each of the plurality of supply holes uniform, but the kneaded material supply holes in the extrusion die are drilled by drilling. Although it has a straight cylindrical shape, the die steel has poor workability because it is a hard metal, and therefore the surface roughness of the inner peripheral surface of the supply hole tends to vary. However, the flow resistance is affected by the surface roughness of the supply hole, and if the surface roughness of the supply hole varies, a difference occurs in the flow resistance. Further, the variation in hole diameter also causes a difference in flow resistance, and as a result, there is a drawback that a high quality honeycomb structure cannot be manufactured.
【０００６】そのため供給穴の面粗度を均一にするため
供給穴を穿孔後、ホ−ニング加工やリ−マ加工やメッキ
等により内周面の面粗度のバラツキを無くすように種々
の工夫が払われているが、このような加工を施すことは
押出ダイスの製作コストを高価にする原因になるだけで
なく、円筒状材料供給穴方式では流動抵抗が大きく、成
形圧力を大きくしなければならなかった。Therefore, in order to make the surface roughness of the supply hole uniform, after the supply hole is drilled, various measures are taken to eliminate variations in the surface roughness of the inner peripheral surface by honing, reaming, plating or the like. However, such processing not only causes the manufacturing cost of the extrusion die to be expensive, but also the cylindrical material supply hole method has a large flow resistance and the molding pressure must be increased. did not become.
【０００７】この点を改善するため例えばそれぞれの坏
土供給穴を異なる内径寸法をもつように形成された内周
面を有するように構成するとともにそれぞれの内周面が
同軸を有するように形成し、これによって流動抵抗を実
質的に均一となるようにした押出ダイスが提案されてい
る（特公平１−４０７３０号参照）。この場合、流動抵
抗は実質的に均一にはなるが、流動抵抗値は大きくな
り、その結果、より大きな押出力を必要とする。In order to improve this point, for example, each kneaded material supply hole is configured to have an inner peripheral surface formed to have different inner diameter dimensions, and each inner peripheral surface is formed to be coaxial. Thus, an extrusion die has been proposed in which the flow resistance is made substantially uniform (see Japanese Patent Publication No. 1-40730). In this case, the flow resistance becomes substantially uniform, but the flow resistance value becomes large, and as a result, a larger pushing force is required.
【０００８】[0008]
【発明が解決しようとする課題】本発明者は、それぞれ
の供給穴の流動抵抗を実質的に均一にするとともに流動
抵抗自体も小さくするための種々検討した結果、本発明
を完成したもので、本発明の目的は流動抵抗を小さくし
た供給穴を有する押出成形用ダイスを供給するにある。The present inventors have completed the present invention as a result of various studies for making the flow resistances of the respective supply holes substantially uniform and reducing the flow resistance itself. An object of the present invention is to supply an extrusion molding die having a supply hole having a reduced flow resistance.
【０００９】[0009]
【課題を解決するための手段】本発明の要旨は、成形材
料供給部及び成形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、成形材料供給部の供給穴の成形
材料供給側の口径を、排出側の口径より広く、円錐形状
としたことを特徴とするハニカム押出成形用ダイスであ
る。The gist of the present invention is, in an extrusion molding die for a honeycomb structure comprising a molding material supply section and a molding groove section, the diameter of the supply hole of the molding material supply section on the molding material supply side. The honeycomb extrusion molding die is characterized in that it has a conical shape that is wider than the diameter on the discharge side.
【００１０】すなわち、本発明においては供給穴の押出
機側の口径を坏土の排出側の口径に比して大としたので
押出機より供給口に導入される際の押出圧力の降下が少
なく、したがって、流動抵抗を軽減することができ、ま
た、供給口の口径は円錐状に次第に小さくなるので、坏
土は供給穴内で徐々に連続的にしぼられることとなり、
流動抵抗はばらつくことない。That is, in the present invention, since the diameter of the feed hole on the extruder side is larger than the diameter of the kneaded material on the discharge side, the drop in the extrusion pressure when introduced into the feed port from the extruder is small. Therefore, the flow resistance can be reduced, and since the diameter of the supply port is gradually reduced to a conical shape, the kneaded material is gradually and continuously squeezed in the supply hole,
Flow resistance does not fluctuate.
【００１１】本発明における供給側口径／排出側口径の
比、すなわち、テ−パ−については、０．５〜３．０程
度である。更に、本発明における供給穴は、その排出側
にストレ−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排出される坏土の流動はより
一層均一になる。ストレ−ト部分の寸法としては供給穴
の全体の１／５〜１／１０程度であり、好ましくは、１
／６〜１／７程度である。The ratio of the diameter on the supply side / the diameter on the discharge side in the present invention, that is, the taper is about 0.5 to 3.0. Further, the supply hole in the present invention preferably has a straight portion on the discharge side thereof, and by having the straight portion, the flow of the kneaded material discharged becomes further uniform. The dimension of the straight portion is about 1/5 to 1/10 of the entire supply hole, preferably 1
It is about / 6 to 1/7.
【００１２】次に図面をもって本発明を具体的に説明す
る。図１は本願発明にかかるハニカム成型用ダイスの側
面断面図で、図２（ａ）はその模式図、図２（ｂ）はそ
の供給口部分の拡大図である。図面において押出成形用
ダイス１は供給部２及び成型口金部３よりなり、供給部
には供給穴４を成形口金部３には成形溝５をそれぞれ穿
設してある。そして本願発明にかかる成形ダイスの供給
口は坏土供給側、即ち押出機の口径ｄ1は排出側即ち成
型溝につながっている口径ｄ2より大きく円錐状を形成
している。また、この供給穴は成型溝側においてストレ
−ト部分ｌを有することが好ましい。Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side sectional view of a honeycomb molding die according to the present invention, FIG. 2 (a) is a schematic view thereof, and FIG. 2 (b) is an enlarged view of a supply port portion thereof. In the drawing, an extrusion molding die 1 comprises a supply unit 2 and a molding die unit 3, and a supply hole 4 is formed in the supply unit and a molding groove 5 is formed in the molding die unit 3. The supply port of the molding die according to the present invention has a cone shape in which the kneaded material supply side, that is, the extruder diameter d 1 is larger than the discharge side, that is, the diameter d 2 connected to the molding groove. Further, this supply hole preferably has a straight portion 1 on the molding groove side.
【００１３】本発明にかかる成形用ダイスを製造するに
際しては材料供給部を製作する一例としては成型溝部側
の口径のドリルを用いて規定の穴開け加工をし、続いて
所望のテ−パ−状となるテ−パ−型ドリルを用いて再加
工を行う事により容易に製作することが可能である。In manufacturing the molding die according to the present invention, as an example of manufacturing the material supplying portion, a prescribed drilling process is performed using a drill having a bore on the molding groove side, and then a desired taper is formed. It can be easily manufactured by reworking using a taper type drill having a shape.
【００１４】具体的に本願発明のハニカム成型用ダイス
の一例を示すと外径１４０ｍｍ、長さ１５０ｍｍセル数
１７０／ｍ2、セル壁厚０．２、ｍｍ気孔径１０μｍ、
気孔率５０％のＳｉＣハニカム成形体を製造するに際し
て、図１に示した円錐状構造を有する供給穴を有する成
形ダイスを使用した。その寸法は供給側の口径が１．７
ｍｍ、排出側の口径は１．３ｍｍであり、その長さは１
５ｍｍであった。そして、排出側より１ｍｍのストレ−
ト部を設けてあり、したがってテ−パ−部は１４ｍｍと
なっていた。A concrete example of the honeycomb molding die of the present invention is as follows: outer diameter 140 mm, length 150 mm, cell number 170 / m 2 , cell wall thickness 0.2, mm pore diameter 10 μm,
When manufacturing a SiC honeycomb molded body having a porosity of 50%, the molding die having the supply hole having the conical structure shown in FIG. 1 was used. The size is 1.7 on the supply side.
mm, the diameter of the discharge side is 1.3 mm, and the length is 1
It was 5 mm. And a 1 mm straight from the discharge side
Therefore, the taper portion was 14 mm.
【００１５】次に、全長が１５ｍｍ、成形材料の供給側
の口径が１．３ｍｍ、排出側の口径が１．０ｍｍの円錐
状構造を有する供給穴を有する成形ダイスを使用し、こ
れに液状物２２．３５部及び２４．３５部を押し出した
ときの押出荷重を測定した。なお、比較のため全長が１
５ｍｍで口径１．０ｍｍのストレ−ト状の供給穴を有す
る成形ダイスについても同様の液状物を押し出したとき
の押出荷重を測定した。その結果は次の通りであった。Next, a molding die having a conical structure having a total length of 15 mm, a diameter of the molding material on the supply side of 1.3 mm, and a diameter of the discharge side of 1.0 mm was used, and a liquid material was used. The extrusion load when 22.35 parts and 24.35 parts were extruded was measured. For comparison, the total length is 1
The extrusion load when a similar liquid material was extruded was also measured for a molding die having a straight feed hole with a diameter of 1.0 mm and a diameter of 5 mm. The results were as follows.
【００１６】 ２２．３５部 ２４．３５ 円錐状供給穴 １，３５０ １，４００ Ｋｇ／ｃｍ2 ストレ−ト状供給穴 １，５５０ １，５００ Ｋｇ／ｃｍ2 このような供給穴の構造を有する成形ダイスを用いた場
合は供給穴がストレ−ト構造（円筒状のもの）の場合に
比して押出必要圧力は減少し、大いに改善された。22.35 parts 24.35 conical supply hole 1,350 1,400 Kg / cm 2 Straight feed hole 1,550 1,500 Kg / cm 2 Compared to the case where the feed hole has a straight structure (cylindrical one), the molding die having such a feed hole structure is used. Therefore, the pressure required for extrusion was reduced and greatly improved.
【００１７】[0017]
【効果】以上述べたように、本願発明はハニカム成型用
ダイスにおいて供給穴の構造として坏土供給側の口径を
坏土排出側の口径に比して大としたことにより次の効果
を奏することができた。 （１）坏土の押出に必要な圧力が小となりダイス強度を
小さくすることができる。（２）ダイスの耐圧強度を維
持しながら坏土供給の均一化ができるように改善され
た。[Effect] As described above, the present invention has the following effects by making the diameter of the kneaded material supply side larger than the diameter of the kneaded material discharge side as the structure of the supply hole in the honeycomb molding die. I was able to. (1) The pressure required to extrude the kneaded material is reduced, and the die strength can be reduced. (2) It has been improved so that the kneaded material can be supplied uniformly while maintaining the pressure resistance of the die.
【図１】本願発明にかかる成形用ダイスの側面断面図FIG. 1 is a side sectional view of a molding die according to the present invention.
【図２】（ａ）成形用ダイスの模式図で（ｂ）は、その
供給部の拡大図FIG. 2A is a schematic view of a molding die, and FIG. 2B is an enlarged view of a supply unit thereof.
１．押出成形用ダイス ２．供給部 ３．成型口金部 ４．供給穴 ５．成形溝 1. Extrusion molding die 2. Supply unit 3. Molding base 4. Supply hole 5. Forming groove
Claims (1)
ハニカム構造体の押出成形用ダイスにおいて、成形材料
供給部の供給穴の成形材料供給側の口径を、排出側の口
径より広く、円錐形状としたことを特徴とするハニカム
押出成形用ダイス。1. A die for extrusion molding of a honeycomb structure comprising a molding material supply section and a molding groove section, wherein the diameter of the supply hole of the supply hole of the molding material supply section is wider than that of the discharge side and is conical. A honeycomb extrusion molding die characterized by having a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03325011A JP3121407B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion die for honeycomb structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03325011A JP3121407B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion die for honeycomb structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05131425A true JPH05131425A (en) | 1993-05-28 |
| JP3121407B2 JP3121407B2 (en) | 2000-12-25 |
Family
ID=18172144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03325011A Expired - Fee Related JP3121407B2 (en) | 1991-11-14 | 1991-11-14 | Extrusion die for honeycomb structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3121407B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010188611A (en) * | 2009-02-18 | 2010-09-02 | Ngk Insulators Ltd | Mouthpiece for molding honeycomb structure |
| WO2013145215A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Die for extrusion molding, production method for die for extrusion molding, and production method for honeycomb structure |
| WO2013145209A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Die for extrusion molding, production method for die for extrusion molding, extrusion molding device, and production method for honeycomb structure |
| WO2013145210A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Metal mold for extrusion forming, fabrication method of metal mold for extrusion forming, and honeycomb structure fabrication method |
| WO2018155002A1 (en) * | 2017-02-24 | 2018-08-30 | 株式会社デンソー | Honeycomb structure molding mold and method for manufacturing honeycomb structure molding mold |
-
1991
- 1991-11-14 JP JP03325011A patent/JP3121407B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010188611A (en) * | 2009-02-18 | 2010-09-02 | Ngk Insulators Ltd | Mouthpiece for molding honeycomb structure |
| WO2013145215A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Die for extrusion molding, production method for die for extrusion molding, and production method for honeycomb structure |
| WO2013145209A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Die for extrusion molding, production method for die for extrusion molding, extrusion molding device, and production method for honeycomb structure |
| WO2013145210A1 (en) | 2012-03-29 | 2013-10-03 | イビデン株式会社 | Metal mold for extrusion forming, fabrication method of metal mold for extrusion forming, and honeycomb structure fabrication method |
| WO2018155002A1 (en) * | 2017-02-24 | 2018-08-30 | 株式会社デンソー | Honeycomb structure molding mold and method for manufacturing honeycomb structure molding mold |
| CN110325336A (en) * | 2017-02-24 | 2019-10-11 | 株式会社电装 | The manufacturing method of honeycomb structure forming metal mold and honeycomb structure forming metal mold |
| US11059200B2 (en) | 2017-02-24 | 2021-07-13 | Denso Corporation | Honeycomb structure forming die and method of manufacturing honeycomb structure forming die |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3121407B2 (en) | 2000-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3905743A (en) | Extrusion apparatus for forming thin-walled honeycomb structures | |
| CA1053446A (en) | Method and apparatus for forming thin-walled honeycomb structures | |
| CN100436106C (en) | Honeycomb-shape mouthpiece forextruding for mation and production method thereof | |
| EP1649994B1 (en) | Die and method for extrusion forming of ceramics | |
| US5308568A (en) | Extrusion die and method | |
| US4687433A (en) | Die for extruding ceramic honeycomb structural bodies | |
| JPS6353923B2 (en) | ||
| US6705851B2 (en) | Extrusion molding apparatus for a thin tube | |
| JPH0645130B2 (en) | Manufacturing method of ceramic honeycomb extrusion die | |
| JP3121407B2 (en) | Extrusion die for honeycomb structure | |
| EP0228258B1 (en) | A die for extruding honeycomb structural bodies | |
| JP3121409B2 (en) | Extrusion die for honeycomb structure | |
| US6302679B1 (en) | Honeycomb extrusion die | |
| JP2010083138A (en) | Method of manufacturing ceramic honeycomb substrate | |
| KR19980071110A (en) | Extrusion Mold Processing Method | |
| JP2021531994A (en) | High isostatic strength honeycomb structures and extrusion dies for honeycomb structures | |
| US11752679B2 (en) | Honeycomb extrusion dies and forming methods | |
| US11839995B2 (en) | Honeycomb bodies with honeycomb structure strengthening features and extrusion dies therefor | |
| EP0997246B1 (en) | Die for manufacturing honeycomb bodies | |
| JPS63209903A (en) | Jig for extrusion molding | |
| JPH11138210A (en) | Extruding tool for indirect extrusion | |
| WO2020236474A1 (en) | Honeycomb extrusion dies and forming methods | |
| JP3121408B2 (en) | Extrusion molding die for honeycomb structure and method for manufacturing the same | |
| JP3121405B2 (en) | Dies for honeycomb molding | |
| JP2925893B2 (en) | Honeycomb structure extrusion apparatus and method for manufacturing honeycomb structure using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 7 Free format text: PAYMENT UNTIL: 20071020 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081020 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 8 Free format text: PAYMENT UNTIL: 20081020 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091020 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091020 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101020 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111020 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |