JP2664949B2 - Honeycomb molding die - Google Patents
Honeycomb molding dieInfo
- Publication number
- JP2664949B2 JP2664949B2 JP63212011A JP21201188A JP2664949B2 JP 2664949 B2 JP2664949 B2 JP 2664949B2 JP 63212011 A JP63212011 A JP 63212011A JP 21201188 A JP21201188 A JP 21201188A JP 2664949 B2 JP2664949 B2 JP 2664949B2
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- die
- cylindrical
- flow path
- clay
- 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
- 238000000465 moulding Methods 0.000 title description 6
- 241000264877 Hippospongia communis Species 0.000 description 48
- 239000004927 clay Substances 0.000 description 17
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008961 swelling Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000037303 wrinkles Effects 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)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はハニカム成形用口金に係り、さらに詳しくは
円筒状のセラミックスハニカム成形体を一体成形するの
に好適なハニカム成形用口金に関する。Description: TECHNICAL FIELD The present invention relates to a honeycomb forming die, and more particularly, to a honeycomb forming die suitable for integrally forming a cylindrical ceramic honeycomb formed body.
従来、セラミックスハニカムの押出法による成形は、
坏土を押出機で加圧して口金から押し出すことによって
行われている。この方法は、ハニカム連続的に成形でき
るため生産性に優れ、口金の形状によって任意のセル形
状およびリブ厚に成形でき、またコルゲート法やペーパ
デッピング法に比べて強度の高いハニカムが得られるな
どの特長があり、成形法の主流をなしている。Conventionally, the forming of ceramic honeycomb by the extrusion method
It is performed by pressing the kneaded clay with an extruder and extruding it from a die. This method is excellent in productivity because it can be formed continuously by honeycomb, it can be formed into any cell shape and rib thickness depending on the shape of the die, and a honeycomb with high strength can be obtained compared to corrugation method and paper dipping method. It has features and is the mainstream of molding methods.
第５図は、従来技術によるハニカム成形用口金の断面
図、第６図は、第５図のVI−VI線矢視図、第７図は、第
５図のVII−VII線矢視図、第８図は、従来技術による平
板ハニカムを組み合わせて作製した放射方向に流路を有
するハニカムの正面図である。FIG. 5 is a cross-sectional view of a conventional honeycomb forming die, FIG. 6 is a view taken along line VI-VI of FIG. 5, FIG. 7 is a view taken along line VII-VII of FIG. FIG. 8 is a front view of a honeycomb having a radial passage formed by combining conventional flat plate honeycombs.
図において、口金20は、供給流路７および排出流路８
を有する複数の単位流路からなる。該口金20の上流端に
供給された坏土は、分割されて個々の供給流路７に流入
し、その平行部を通過して供給流路７の下流端と接続す
る十字形断面をした排出流路（十字スリット）８へ流入
する。該排出流路８を通過する間に流路合流面で坏土は
互いに圧着しあい、口金開放端10でハニカムセルとして
連続的に成形排出される。なお、外枠21は、成形の際に
口金20に嵌合されて使用される。In the drawing, the base 20 is provided with a supply flow path 7 and a discharge flow path 8.
And a plurality of unit flow paths having The clay supplied to the upstream end of the die 20 is divided and flows into the individual supply flow paths 7, passes through parallel portions thereof, and has a cross-shaped discharge connecting to the downstream end of the supply flow path 7. It flows into the flow channel (cross slit) 8. While passing through the discharge flow channel 8, the kneaded materials are pressed against each other at the flow channel merging surface, and are continuously formed and discharged as honeycomb cells at the open end 10 of the die. The outer frame 21 is used by being fitted to the base 20 at the time of molding.
このようにして得られるハニカム成形体は、その流路
が同一方向の直線流路となっているため、一方向流れの
途中に設置して流体を処理する場合にはそのまま使用す
ることができるが、吹き出し流れを呈する流体を周囲に
分散させる場合、または周囲から流入する流れを一箇所
に吸い込ませるような場合には、第８図に示すように平
板ハニカム18を組み合わせて所望の形状になるように接
合し、円筒状として使用する必要がある。曲面を平板ハ
ニカム18で近似すると必然的に多角形となり、流路のな
いくさび状接合部19が形成されるため、周方向における
流れや熱等の移動が不均一となる問題がある。この影響
は、前記組み合わせハニカムの円筒外径Ｄに対する内径
ｄの比d/Dが小さいほど大きくなる。平板ハニカム18の
接合には、特公昭58−39799号公報に示されるように無
機系接着剤またはハニカムと同組成の無機系粒子を含ん
だスラリーが一般的に用いられる。しかし、このような
組み合わせハニカムの接合面の強度は母材と比較して小
さいためハニカムの品質を安定させることが困難であ
る。また平板ハニカムの接合工程が自動化しにくいため
製造工程数が多くなり、高コストになる問題がある。Since the honeycomb formed body obtained in this way has a straight flow path in the same direction, it can be used as it is when it is installed in the middle of a one-way flow to process a fluid. In the case of dispersing a fluid exhibiting a blowing flow to the surroundings, or a case of sucking a flow flowing from the surroundings into one place, as shown in FIG. 8, the flat honeycombs 18 are combined to form a desired shape. To be used as a cylinder. When the curved surface is approximated by the flat plate honeycomb 18, the shape becomes inevitably polygonal, and the wedge-shaped joint portion 19 without the flow path is formed. Therefore, there is a problem that the movement of the flow and the heat in the circumferential direction becomes uneven. This effect increases as the ratio d / D of the inner diameter d to the cylindrical outer diameter D of the combined honeycomb decreases. As shown in JP-B-58-39799, an inorganic adhesive or a slurry containing inorganic particles having the same composition as the honeycomb is generally used for joining the flat honeycombs 18. However, since the strength of the bonding surface of such a combined honeycomb is smaller than that of the base material, it is difficult to stabilize the quality of the honeycomb. Further, since it is difficult to automate the joining process of the flat honeycomb, the number of manufacturing steps increases, and there is a problem that the cost increases.
本発明の目的は、上記従来技術の問題点を解決し、強
固で安定した品質のハニカム成形体を、一体成形して得
ることができる円筒状のハニカム成形用口金を提供する
ことにある。An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a cylindrical honeycomb forming die that can be obtained by integrally forming a strong and stable honeycomb formed body.
本発明の第１は、所定の壁厚からなる円筒と、該円筒
に放射状に設けられた格子状の溝からなる排出流路とを
有することを特徴とする。A first aspect of the present invention is characterized in that it has a cylinder having a predetermined wall thickness, and a discharge channel formed of lattice-shaped grooves radially provided in the cylinder.
本発明の第２は、前記排出流路の軸方向流路スリット
幅の一部または全部が、他の流路スリット幅より広いこ
とを特徴とする。A second aspect of the present invention is characterized in that a part or all of the axial flow path slit width of the discharge flow path is wider than other flow path slit widths.
本発明のハニカム成形用口金において、円筒状口金の
外周側から供給された坏土は、例えば供給流路を経て排
出流路に至り、そこで互いに圧着しあって一体物のハニ
カムに成形される。この際、排出流路の軸方向の各流路
が平行で、周方向の各流路が円筒状口金の中心軸に向か
って延びているため、口金開放端から押し出されたハニ
カム成形体は、円筒状口金の中心軸に向かって流れて円
筒状となる。坏土を円筒状口金の外側から内側に流動さ
せると、口金の開放端から流出方向に進むに従って成形
体の各々のセル断面が縮小し、成形体が圧縮され、強固
な成形体が得られ、亀裂等を発生することがない。これ
に対して坏土を口金の内側から外側に流動させると、口
金の開放端から流出方向に進むに従って成形体の断面が
拡大するため、圧着部またはコーナ部で亀裂が発生し易
くなる傾向にある。In the die for forming a honeycomb of the present invention, the clay supplied from the outer peripheral side of the cylindrical die reaches, for example, a discharge flow path via a supply flow path, where they are pressed against each other to be formed into an integral honeycomb. At this time, since the respective flow paths in the axial direction of the discharge flow path are parallel and the respective flow paths in the circumferential direction extend toward the central axis of the cylindrical die, the honeycomb molded body extruded from the die open end is: It flows toward the central axis of the cylindrical die and becomes cylindrical. When the clay is caused to flow from the outside to the inside of the cylindrical die, the cell cross section of each of the molded bodies is reduced as the flow proceeds from the open end of the die to the outflow direction, the molded bodies are compressed, and a strong molded body is obtained. No cracks or the like are generated. On the other hand, when the clay is caused to flow from the inside of the die to the outside, the cross-section of the formed body expands as the flow proceeds from the open end of the die to the outflow direction. is there.
また径方向に厚いハニカム成形体を得る場合には、成
形体の外周部セル断面に対する内周部セル断面の縮小率
が大きくなるため、口金中心軸に向かうに従って体積の
減少分をセル内で吸収できなくなり、成形体の先端が口
金の軸方向に膨れる現象が生じる。この現象は、排出流
路の軸方向流路スリット幅の一部または全部を他のスリ
ット幅より広くすることによって解放される。すなわ
ち、軸方向に膨れようとする力を、広いスリットによっ
て得られる厚肉リブで拘束し、それによって生じる周方
向の圧縮力を周方向の比較的薄いリブに集中させ、しわ
を発生させることによって口金の軸方向に膨れるのが防
止される。Also, when a honeycomb formed body having a large thickness in the radial direction is obtained, the reduction rate of the inner peripheral cell cross section with respect to the outer peripheral cell cross section of the formed body increases, so that the decrease in volume is absorbed in the cell toward the center axis of the die. No longer possible, the phenomenon occurs that the tip of the molded body swells in the axial direction of the die. This phenomenon is relieved by making some or all of the width of the slit in the axial direction of the discharge channel wider than the other slit widths. In other words, by restraining the force to expand in the axial direction by the thick ribs obtained by the wide slits, and by concentrating the circumferential compressive force generated by the ribs on the relatively thin ribs in the circumferential direction, wrinkles are generated. Swelling in the axial direction of the base is prevented.
以下、本発明を実施例により詳しく説明するが、本発
明はこれらに限定されるものではない。Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited thereto.
第１図は、本発明の一実施例のハニカム成形用口金を
用いた押出成形装置の断面図、第２図は、第１図の口金
部分（Ａ部）の拡大図、第３図は、第２図のＩ−Ｉ線矢
視図、第４図は、第１図の押出成形装置で得られた円筒
状ハニカムの外観図である。FIG. 1 is a sectional view of an extrusion molding apparatus using a honeycomb molding die according to one embodiment of the present invention, FIG. 2 is an enlarged view of a die portion (A portion) in FIG. 1, and FIG. FIG. 2 is an external view of a cylindrical honeycomb obtained by the extrusion molding apparatus shown in FIG.
図において、円筒状口金１は、坏土投入口11、脱気口
12およびオーガマシン13を備えた押出機17の先端に、テ
ーパバレル４、盲栓３および導流バレル２によって固定
され、坏土を一旦分割して口金の奥に均一に導入するた
めの口金中心軸方向に延びた供給流路８と、該供給流路
８の内側に設けられる放射状に格子状の溝を有する排出
流路７からなる。このような構成において、坏土投入口
11から供給された坏土は、押出機17によって加圧され、
テーパバレル４を通り、円筒状口金１の片側端面の盲栓
３、口金外周側面５および導流バレル２によって形成さ
れる坏土溜め６に入る。坏土はここで一旦溜められた
後、口金外周側面５から口金流路内部へ徐々に供給され
る。この部分では坏土が殆ど淀んだ状態になるため、口
金の軸方向および周方向での圧力はほぼ均一となる。こ
の部分の圧力をより均一にするには、坏土溜め６の容積
を大きくするのが好ましい。均一圧力で口金１に供給さ
れた坏土は、供給流路７および排出流路８を経て、第３
図に示すように口金開放端10から一斉に円筒口金の軸15
に向けて流出され、成形体先端16を有する円筒状ハニカ
ム14となる。In the figure, a cylindrical die 1 has a clay input port 11, a deaeration port.
A center axis of a die fixed to a tip of an extruder 17 having a 12 and an auger machine 13 by a tapered barrel 4, a blind plug 3 and a flow guiding barrel 2, for dividing the clay once and uniformly introducing it into the back of the die. It comprises a supply flow path 8 extending in the direction, and a discharge flow path 7 provided inside the supply flow path 8 and having radially lattice-shaped grooves. In such a configuration, the clay input port
The clay supplied from 11 is pressurized by an extruder 17,
After passing through the tapered barrel 4, it enters the clay reservoir 6 formed by the blind plug 3 on one end surface of the cylindrical die 1, the die outer peripheral side surface 5, and the flow guiding barrel 2. After the kneaded clay is once stored here, the kneaded clay is gradually supplied from the outer peripheral side surface 5 of the die to the inside of the die channel. In this portion, the kneaded clay is almost stagnant, so that the pressure in the axial direction and the circumferential direction of the die is substantially uniform. In order to make the pressure in this portion more uniform, it is preferable to increase the volume of the clay reservoir 6. The clay supplied to the die 1 at a uniform pressure passes through the supply flow path 7 and the discharge flow path 8,
As shown in the figure, the cylindrical base shaft 15
To form a cylindrical honeycomb 14 having a molded body tip 16.
所望の厚さに成形された円筒状ハニカム14は、口金開
放端10とつながっているため、押出機を一旦停止し、口
金開放端の径よりやや小さい径を有する薄肉コアドリル
状のへらを成形体取り出し口９から回転させながら送入
し、成形体と口金を切り離して取り出し、通風または自
然乾燥した後、焼成してハニカムセラミックスとされ
る。Since the cylindrical honeycomb 14 formed to a desired thickness is connected to the open end 10 of the base, the extruder is temporarily stopped, and a thin core drill-shaped spatula having a diameter slightly smaller than the diameter of the open end of the base is formed. The molded body and the die are separated and taken out while being rotated from the take-out port 9, and are taken out and air-dried, and then fired to obtain a honeycomb ceramic.
周方向と軸方向の排出流路スリット幅を等しくした場
合は、円筒状ハニカムの外径Ｌに対する内径ｌの比l/L
が0.9以上で軸方向の膨れが生じなかった。また軸方向
の全ての排出流路スリット幅を周方向の排出流路スリッ
ト幅の２倍とした場合は、l/Lが0.5以上で軸方向に膨れ
が生じなかった。該軸方向のスリット幅は、周方向のス
リット幅および成形体の径方向厚さの他、口金出口のセ
ル形状、寸法、坏土の特性等によって適宜決定すること
が好ましい。When the widths of the discharge passage slits in the circumferential direction and the axial direction are equal, the ratio of the inner diameter 1 to the outer diameter L of the cylindrical honeycomb is 1 / L.
Was 0.9 or more, no axial swelling occurred. When the width of all the slits in the axial direction was twice the width of the slit in the circumferential direction, l / L was 0.5 or more and no swelling occurred in the axial direction. The axial width of the slit is preferably determined as appropriate in accordance with the cell shape and dimensions of the outlet of the die, the properties of the clay, and the like, in addition to the circumferential width of the slit and the radial thickness of the compact.
円筒状ハニカム厚さ寸法や外周および内周側面の研摩
仕上げは、必要に応じて施せばよいが、その時期は乾燥
後または焼成後でもよい。The thickness of the cylindrical honeycomb and the polishing of the outer peripheral surface and the inner peripheral side surface may be performed as necessary, but may be performed after drying or firing.
また本実施例では、円筒状の口金を使用したが、部分
円筒状（例えば半円状）のハニカム成形用口金を使用す
れば部分円筒状ハニカムを得ることができる。In this embodiment, a cylindrical die is used. However, if a partially cylindrical (for example, semicircular) honeycomb forming die is used, a partially cylindrical honeycomb can be obtained.
以上のようにして得られた円筒状ハニカムに、例えば
燃焼用触媒を担持させ、該ハニカムの円筒軸方向から燃
料混合ガスを提供すると、セル内で酸化反応を起こし、
熱が放射方向に発散するため暖房器として適用すること
ができる。また燃焼用触媒を担持させたハニカムの円筒
軸付近に反応容器を置き、外側面から燃料混合ガスを供
給して触媒燃焼させると、該反応容器に周囲から均一な
放射および対流熱が供給されるため、極めて効率的な加
熱炉を構成することができる。On the cylindrical honeycomb obtained as described above, for example, a combustion catalyst is supported, and when a fuel mixed gas is provided from the cylindrical axis direction of the honeycomb, an oxidation reaction occurs in the cell,
Since the heat is radiated in the radial direction, it can be applied as a heater. In addition, when the reaction vessel is placed near the cylindrical axis of the honeycomb supporting the combustion catalyst and the fuel mixture gas is supplied from the outer surface to perform catalytic combustion, uniform radiation and convection heat are supplied to the reaction vessel from the surroundings. Therefore, a very efficient heating furnace can be configured.
〔発明の効果〕 本発明のハニカム成形用口金によれば、一体成形によ
る強固な円筒状ハニカム成形体を得ることができる。ま
た該口金の軸方向スリット幅を広くすることによって成
形体先端が軸方向に膨れるのを防止することができるた
め、安定した品質の円筒状ハニカム成形体を得ることが
できる。さらに平板ハニカムの接合工程を省くことがで
きるので低コストの円筒状ハニカム成形体が得られる。[Effect of the Invention] According to the honeycomb forming die of the present invention, it is possible to obtain a strong cylindrical honeycomb formed body by integral molding. In addition, by increasing the axial slit width of the die, it is possible to prevent the tip of the molded body from swelling in the axial direction, so that a cylindrical honeycomb molded body of stable quality can be obtained. Further, the step of joining the flat honeycombs can be omitted, so that a low-cost cylindrical honeycomb formed body can be obtained.
第１図は、本発明の一実施例のハニカム成形用口金を用
いた押出成形装置の断面図、第２図は、第１図の口金部
分（Ａ部）の拡大図、第３図は、第２図のＩ−Ｉ線矢視
図、第４図は、第１図の押出成形装置で得られる円筒状
ハニカムの外観図、第５図は、従来技術のハニカム成形
用口金の断面図、第６図は、第５図のVI−VI線矢視図、
第７図は、第２図のVII−VII線矢視図、第８図は、従来
技術による平板ハニカムを組み合わせて放射方向に流路
を有するハニカム成形用口金の概略図である。 １……円筒状口金、２……導流バレル、３……盲栓、４
……テーパバレル、５……口金外周側面、６……坏土溜
め、７……供給流路、８……排出流路、９……成形体取
出口、10……口金開放端、14……円筒状ハニカム、15…
…円筒口金の軸、16……成形体先端、18……平板ハニカ
ム、19……くさび形接合部。FIG. 1 is a sectional view of an extrusion molding apparatus using a honeycomb molding die according to one embodiment of the present invention, FIG. 2 is an enlarged view of a die portion (A portion) in FIG. 1, and FIG. FIG. 2 is a view taken along the line II of FIG. 2, FIG. 4 is an external view of a cylindrical honeycomb obtained by the extrusion molding apparatus of FIG. 1, FIG. FIG. 6 is a view taken along line VI-VI of FIG. 5,
FIG. 7 is a view taken along line VII-VII of FIG. 2, and FIG. 8 is a schematic view of a die for forming a honeycomb having a flow path in the radial direction by combining a flat plate honeycomb according to the prior art. 1 ... cylindrical cap, 2 ... guide barrel, 3 ... blind plug, 4
... taper barrel, 5 ... outer peripheral surface of the base, 6 ... clay reservoir, 7 ... supply flow path, 8 ... discharge flow path, 9 ... molded product outlet, 10 ... die open end, 14 ... Cylindrical honeycomb, 15…
... shaft of cylindrical base, 16 ... tip of molded body, 18 ... flat honeycomb, 19 ... wedge-shaped joint.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 出本 巌 広島県呉市宝町６番９号 バブコック日 立株式会社呉工場内 (72)発明者 一柳 宏 広島県呉市宝町６番９号 バブコック日 立株式会社呉工場内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Iwamoto Iwamoto 6-9 Takaracho, Kure-shi, Hiroshima Pref. Inside the Kure Plant of Kumamoto Co., Ltd. (72) Inventor Hiroshi Ichiyanagi 6-9 Takaracho, Kure-shi, Hiroshima Babcock Date Kure Factory
Claims (2)
状に設けられた格子状の溝からなる排出流路とを有する
ハニカム成形用口金。1. A honeycomb forming die having a cylinder having a predetermined wall thickness and a discharge channel formed of lattice-shaped grooves radially provided in the cylinder.
たは全部が、他の流路スリット幅より広いことを特徴と
する請求項（１）記載のハニカム成形用口金。2. The honeycomb-forming die according to claim 1, wherein a part or all of the axial slit width of the discharge channel is wider than the other slit widths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212011A JP2664949B2 (en) | 1988-08-26 | 1988-08-26 | Honeycomb molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212011A JP2664949B2 (en) | 1988-08-26 | 1988-08-26 | Honeycomb molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0260714A JPH0260714A (en) | 1990-03-01 |
| JP2664949B2 true JP2664949B2 (en) | 1997-10-22 |
Family
ID=16615405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63212011A Expired - Fee Related JP2664949B2 (en) | 1988-08-26 | 1988-08-26 | Honeycomb molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2664949B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5314650A (en) * | 1993-02-23 | 1994-05-24 | Corning Incorporated | Method for extruding honeycombs |
| US5286323A (en) * | 1993-02-23 | 1994-02-15 | Corning Incorporated | Dome shaped extrusion dies |
-
1988
- 1988-08-26 JP JP63212011A patent/JP2664949B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0260714A (en) | 1990-03-01 |
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