JPH06143231A - Method and apparatus for molding honeycomb structure - Google Patents
Method and apparatus for molding honeycomb structureInfo
- Publication number
- JPH06143231A JPH06143231A JP30258192A JP30258192A JPH06143231A JP H06143231 A JPH06143231 A JP H06143231A JP 30258192 A JP30258192 A JP 30258192A JP 30258192 A JP30258192 A JP 30258192A JP H06143231 A JPH06143231 A JP H06143231A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb structure
- forming
- molding
- channel
- flow path
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000004927 clay Substances 0.000 description 18
- 230000004075 alteration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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、ハニカム構造体成形方
法および装置に係り、特に、成形流路の閉塞を防ぐとと
もに、成形と同時に連続して坏土のサンプリングが行な
えるハニカム構造体成形方法および装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for forming a honeycomb structure, and more particularly, to a method for forming a honeycomb structure capable of preventing clogging of a forming channel and continuously sampling kneaded material simultaneously with forming. And the device.
【０００２】[0002]
【従来の技術】ハニカム構造体を形成するための一般的
な口金は、特公昭５１−１２３２号公報に示されてい
る。この口金は、例えば図３のように、互いに連結した
狭溝よりなるハニカム構造体の成形流路５を一端に有
し、該成形流路５と連結し独立した複数の供給流路６が
他端で開口した流路構造となっている。ハニカム構造体
は、触媒等のさまざまな分野で使用されるため、各分野
に適した坏土１３（図４参照）が調整され、押出し成形
されるが、成形流路５は狭溝を有するために、ゴミ等の
混入物により該成形流路を流動できない坏土塊が生じる
と、ハニカム構造体に欠陥を生じる。これを防止するた
めに、金網等で坏土を目通しすることが行なわれ、金網
を口金上流側に設けたり、目通し専用機を設けたりされ
ている。なお、この種の装置として関連するものには、
特公昭５５−４１９０８号公報等が挙げられる。2. Description of the Related Art A general die for forming a honeycomb structure is disclosed in Japanese Patent Publication No. 51-1232. For example, as shown in FIG. 3, this die has a molding flow path 5 of a honeycomb structure composed of narrow grooves connected to each other at one end, and a plurality of independent supply flow paths 6 connected to the molding flow path 5 and others. It has a flow channel structure that opens at the end. Since the honeycomb structure is used in various fields such as a catalyst, the kneaded clay 13 (see FIG. 4) suitable for each field is prepared and extruded, but the forming flow path 5 has narrow grooves. In addition, if a kneaded clay mass that cannot flow through the molding flow path is generated due to a contaminant such as dust, a defect occurs in the honeycomb structure. In order to prevent this, the kneaded material is perforated with a wire net or the like, and the wire net is provided on the upstream side of the mouthpiece or a machine for exclusive use of the eye opening. In addition, related to this type of device,
JP-B-55-41908 is cited.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術は、本来
あるはずのない成形流路を閉塞する坏土中の塊を除去す
ることはできるが、混入物によるものとは違って押出機
内での坏土の変質による塊を除去する点については考慮
がされておらず、坏土の不均質や、押出機内における坏
土に加わる応力分布や滑りが原因で形成される坏土塊に
よって、成形流路が閉塞される問題があった。The above-mentioned prior art is capable of removing the lumps in the kneaded material which block the molding flow passage, which should never exist, but unlike in the case of the inclusions, the lumps in the extruder can be removed. No consideration is given to the point of removing lumps due to alteration of the kneaded clay, and the molding flow path is formed by the kneaded clay lumps that are formed due to the unevenness of the kneaded clay, the stress distribution applied to the kneaded clay in the extruder, and slippage. There was a problem that was blocked.
【０００４】本発明の目的は、上記従来技術の問題点を
なくし、口金の成形流路を閉塞させる坏土塊、例えば図
４に示すように、押出機の内壁近傍に形成される坏土塊
１４を除去するのに好適なハニカム構造体成形方法およ
び装置を提供することにある。The object of the present invention is to eliminate the above-mentioned problems of the prior art, and to form a kneaded clay mass that closes the forming flow path of the die, for example, a kneaded clay mass 14 formed near the inner wall of the extruder as shown in FIG. It is an object of the present invention to provide a honeycomb structure forming method and apparatus suitable for removal.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
本願の第１の発明は、押出し可能材料をハニカム構造体
成形装置に供給して構造体を成形する方法において、押
出し可能材料を独立した複数の供給通路を通して長手方
向に流動させ、この流動させた材料を互いに連結した狭
溝よりなるハニカム構造体の成形流路に供給し、該成形
流路内を長手方向に流動させてハニカム構造体として排
出させるとともに、最外周の前記供給通路および成形通
路の外周に設けられた独立した複数の排出流路を通して
前記装置に供給された外周部の押出し可能材料を排出す
ることを特徴とするハニカム構造体成形方法に関する。In order to achieve the above object, the first invention of the present application is a method for forming a structure by supplying an extrudable material to a honeycomb structure forming apparatus, in which the extrudable material is independent. The honeycomb structure is made to flow in the longitudinal direction through a plurality of supply passages, and the fluidized material is supplied to a forming channel of a honeycomb structure having narrow grooves connected to each other, and is made to flow in the forming channel in the longitudinal direction. The honeycomb structure is characterized in that the extrudable material in the outer peripheral portion supplied to the apparatus is discharged through a plurality of independent discharge passages provided on the outer periphery of the outermost supply passage and the forming passage. The present invention relates to a body forming method.
【０００６】第２の発明は、互いに連結した狭溝よりな
るハニカム構造体の成形流路を一端に有し、該成形流路
と連結し独立した複数の供給流路が他端で開口したハニ
カム構造体成形装置において、最外周成形流路の外周に
独立した複数の排出流路を設置したことを特徴とするハ
ニカム構造体成形装置に関する。第３の発明は、上記第
２の発明において、前記最外周の成形流路と排出流路の
出口端間に仕切板を設けたことを特徴とするハニカム構
造体成形装置に関する。A second aspect of the present invention is a honeycomb having a forming channel of a honeycomb structure composed of narrow grooves connected to each other at one end, and a plurality of independent supply channels connected to the forming channel and being opened at the other end. The present invention relates to a honeycomb structure forming apparatus, wherein a plurality of independent discharge channels are provided on the outer periphery of the outermost peripheral forming channel in the structure forming apparatus. A third aspect of the present invention relates to the honeycomb structure forming apparatus according to the second aspect of the present invention, characterized in that a partition plate is provided between the outermost peripheral forming channel and the outlet end of the discharge channel.
【０００７】[0007]
【作用】坏土の変質による塊は、坏土中の水分が移動し
やすいせん断速度の大きな領域で形成されやすく、押出
機内では、内壁面に接する領域がそれに該当し、特に図
４に示すようなスクリュー式連続押出機においては、オ
ーガスクリュー１０の山とオーガバーレル９との隙間で
のせん断速度が大きい。バーレル内の坏土はスクリュー
軸と垂直面方向への移動は大きくなく、押出機内壁近傍
で形成された坏土塊は口金の外周部に流入することにな
る。またハニカムの外寸法Ｄ1 は、押出機の開口部外寸
法Ｄ2 よりも小さいのが一般的であり、そのため口金に
隣接する上流部の最外周成形流路より外側には坏土の滞
留部１５が生じ、この領域もせん断速度が大きいため坏
土塊を形成しやすくなる。[Function] A lump caused by alteration of the kneaded clay is apt to be formed in a region having a large shear rate in which water in the kneaded clay is apt to move. In such a screw type continuous extruder, the shear rate in the gap between the crest of the auger screw 10 and the auger barrel 9 is high. The kneaded material in the barrel does not move much in the direction perpendicular to the screw axis, and the kneaded material formed near the inner wall of the extruder flows into the outer peripheral portion of the die. Further, the outer dimension D 1 of the honeycomb is generally smaller than the outer dimension D 2 of the opening of the extruder, and therefore, the accumulation portion of the kneaded material is located outside the outermost peripheral forming flow path in the upstream portion adjacent to the die. 15 occurs, and since the shear rate is also high in this region, it is easy to form a kneaded clay mass.
【０００８】本発明における最外周流路の外周に設けた
独立した複数の排出流路は、押出機内壁近傍に形成され
る坏土塊の流出路として働き、流路を閉塞させるような
坏土塊を成形用流路へ流入させない。これにより成形用
流路は閉塞することがなく、押し出されたハニカム構造
体は健全である。最外周成形流路の外周に流路を設ける
ことは、坏土の口金への流入状態を、内部成形流路の流
入状態と同一にする効果があり、押出成形が安定する。A plurality of independent discharge channels provided on the outer circumference of the outermost peripheral channel in the present invention act as outlet channels for the kneaded mass formed near the inner wall of the extruder, and block the kneaded mass that closes the channel. Do not flow into the molding flow path. As a result, the molding channel is not blocked, and the extruded honeycomb structure is sound. Providing a flow channel on the outer circumference of the outermost peripheral molding flow channel has the effect of making the inflow state of the kneaded material into the die equal to the inflow state of the internal molding flow channel, and the extrusion molding is stable.
【０００９】また、排出流路から押し出される坏土は、
随時サンプリングでき、坏土の性状が把握でき、排出流
路が閉塞した場合は成形体に欠陥が発生する危険性があ
ることを予測できる。The kneaded material extruded from the discharge passage is
It can be sampled at any time, the properties of the kneaded clay can be grasped, and it can be predicted that there is a risk that defects will occur in the molded body if the discharge flow path is blocked.
【００１０】[0010]
【実施例】図１、図２に本発明であるハニカム構造体成
形装置の口金を示す。本口金は一般的なハニカム構造体
成形用口金の最外周成形流路の外周に独立した複数の排
出流路を設けたもので、この排出流路は金型１と外枠２
の両方に設けた外枠側排出流路７、金型側排出流路８か
らなる。外枠２には排出された坏土をハニカム構造体と
分離する仕切り板４を設ける。1 and 2 show a die of a honeycomb structure forming apparatus according to the present invention. This die is provided with a plurality of independent discharge passages on the outer periphery of the outermost peripheral forming passage of a general honeycomb structure forming die. The discharge passages are the mold 1 and the outer frame 2.
The outer frame side discharge flow path 7 and the mold side discharge flow path 8 are provided on both sides. The outer frame 2 is provided with a partition plate 4 for separating the discharged kneaded clay from the honeycomb structure.
【００１１】金型側排出流路８は、成形用供給流路６の
寸法と同一とする。外枠側排出流路７は、最外周成形用
流路の流量と同一になるように寸法を決める。こうした
排出流路を設けた口金でハニカム構造体を成形した場
合、排出流路のない従来型口金で成形した場合に比較
し、ハニカム構造体外周部に欠陥が生じない。また、こ
の排出流路が閉塞した場合でも、成形途中でハニカム構
造体に影響を与えることなく、成形体の成形作業の区切
れに口金の清掃を行なうことで、欠陥のないハニカム構
造体が得られる。The mold-side discharge flow path 8 has the same dimensions as the molding supply flow path 6. The outer frame side discharge flow channel 7 is dimensioned so as to be the same as the flow rate of the outermost peripheral molding flow channel. When the honeycomb structure is molded with the die having such discharge channels, defects are not generated in the outer peripheral portion of the honeycomb structure as compared with the case where the honeycomb structure is molded with the conventional die without the discharge channels. Further, even if this discharge flow path is blocked, cleaning of the die is carried out to break the molding operation of the molded body without affecting the honeycomb structure during molding, so that a honeycomb structure without defects can be obtained. To be
【００１２】排出流路より排出された坏土は、随時サン
プリングして性状調査に用いられ、押出機内、特に内壁
近傍での坏土の変質を捉えることが可能となる。サンプ
リング以外の坏土は、再度押出機内に戻されて使用され
る。The kneaded material discharged from the discharge passage is sampled at any time and used for property inspection, and it is possible to grasp the alteration of the kneaded material in the extruder, especially in the vicinity of the inner wall. The kneaded material other than the sample is returned to the extruder and used again.
【００１３】[0013]
【発明の効果】本発明によれば、押出機内壁近傍での変
質坏土を成形流路に流入させることがなく、ハニカム構
造体の成形に欠陥を生じさせる頻度が減少するため、製
造効率の向上効果がある。According to the present invention, the quality of the kneaded clay near the inner wall of the extruder does not flow into the forming channel, and the frequency of causing defects in the forming of the honeycomb structure is reduced. There is an improvement effect.
【図１】本発明の実施例になるハニカム構造体成形装置
の口金の正面図。FIG. 1 is a front view of a die of a honeycomb structure forming apparatus according to an embodiment of the present invention.
【図２】本発明の実施例になるハニカム構造体成形装置
の口金の断面図。FIG. 2 is a sectional view of a die of a honeycomb structure forming apparatus according to an embodiment of the present invention.
【図３】一般的な従来のハニカム構造体成形用口金の断
面図。FIG. 3 is a cross-sectional view of a general conventional die for forming a honeycomb structure.
【図４】スクリュー式連続押出機のバーレル内部を示す
図。FIG. 4 is a view showing the inside of a barrel of a screw type continuous extruder.
１…金型、２…外枠、４…仕切り板、５…リブ成形流
路、６…坏土供給流路、７…外枠側排出流路、８…金型
側排出流路、９…オーガバーレル、１０…オーガスクリ
ュー、１１…テーパバーレル、１２…延長バーレル、１
３…坏土、１４…坏土塊、１５…滞留坏土。DESCRIPTION OF SYMBOLS 1 ... Mold, 2 ... Outer frame, 4 ... Partition plate, 5 ... Rib forming flow path, 6 ... Kneaded clay supply flow path, 7 ... Outer frame side discharge flow path, 8 ... Mold side discharge flow path, 9 ... Auger barrel, 10 ... Auger screw, 11 ... Tapered barrel, 12 ... Extension barrel, 1
3 ... Kneaded clay, 14 ... Kneaded clay mass, 15 ... Accumulated kneaded clay.
Claims (3)
置に供給して構造体を成形する方法において、押出し可
能材料を独立した複数の供給通路を通して長手方向に流
動させ、この流動させた材料を互いに連結した狭溝より
なるハニカム構造体の成形流路に供給し、該成形流路内
を長手方向に流動させてハニカム構造体として排出させ
るとともに、最外周の前記供給通路および成形通路の外
周に設けられた独立した複数の排出流路を通して前記装
置に供給された外周部の押出し可能材料を排出すること
を特徴とするハニカム構造体成形方法。1. A method for forming a structure by supplying an extrudable material to a honeycomb structure forming apparatus, wherein the extrudable material is caused to flow longitudinally through a plurality of independent supply passages, and the flowed materials are mutually It is supplied to the forming channel of the honeycomb structure composed of the connected narrow grooves, is flown in the forming channel in the longitudinal direction and is discharged as a honeycomb structure, and is provided on the outermost periphery of the supply passage and the forming passage. A method for forming a honeycomb structure, characterized in that the extrudable material in the outer peripheral portion supplied to the apparatus is discharged through a plurality of independent discharge passages.
造体の成形流路を一端に有し、該成形流路と連結し独立
した複数の供給流路が他端で開口したハニカム構造体成
形装置において、最外周成形流路の外周に独立した複数
の排出流路を設置したことを特徴とするハニカム構造体
成形装置。2. A honeycomb structure forming apparatus having at one end a forming flow path of a honeycomb structure composed of narrow grooves connected to each other, and a plurality of independent supply flow paths connected to the forming flow path being open at the other end. 2. In the honeycomb structure forming apparatus, a plurality of independent discharge channels are provided on the outer periphery of the outermost peripheral molding channel.
路と排出流路の出口端間に仕切板を設けたことを特徴と
するハニカム構造体成形装置。3. The honeycomb structure forming apparatus according to claim 2, wherein a partition plate is provided between the outlet ends of the outermost peripheral forming flow passage and the discharge flow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30258192A JPH06143231A (en) | 1992-11-12 | 1992-11-12 | Method and apparatus for molding honeycomb structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30258192A JPH06143231A (en) | 1992-11-12 | 1992-11-12 | Method and apparatus for molding honeycomb structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06143231A true JPH06143231A (en) | 1994-05-24 |
Family
ID=17910706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30258192A Pending JPH06143231A (en) | 1992-11-12 | 1992-11-12 | Method and apparatus for molding honeycomb structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06143231A (en) |
-
1992
- 1992-11-12 JP JP30258192A patent/JPH06143231A/en active Pending
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