JPS6285906A - Method and device for molding ceramic pipe with bottom - Google Patents

Method and device for molding ceramic pipe with bottom

Info

Publication number
JPS6285906A
JPS6285906A JP22566885A JP22566885A JPS6285906A JP S6285906 A JPS6285906 A JP S6285906A JP 22566885 A JP22566885 A JP 22566885A JP 22566885 A JP22566885 A JP 22566885A JP S6285906 A JPS6285906 A JP S6285906A
Authority
JP
Japan
Prior art keywords
cap
tip
outer cap
communication hole
air communication
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
Application number
JP22566885A
Other languages
Japanese (ja)
Other versions
JPH0437762B2 (en
Inventor
梶田　武
八重尾　秀治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP22566885A priority Critical patent/JPS6285906A/en
Publication of JPS6285906A publication Critical patent/JPS6285906A/en
Publication of JPH0437762B2 publication Critical patent/JPH0437762B2/ja
Granted legal-status Critical Current

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
    • B28B3/2627—Extrusion dies using means for making hollow objects with transverse walls, e.g. hollow objects closed on all sides

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)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は有底セラミックパイプの成形方法とこれに使用
される成形装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of forming a bottomed ceramic pipe and a forming apparatus used therein.

（従来の技術） 有底セラミックパイプの成形方法としてはプレス成形方
法が一最的であるが、パイプ全長が長い場合には歩留り
が低下するとともにプレス成形装置が大型化する欠点が
ある。このため長いパイプを成形する場合には押出成形
法が採用されているが、従来の押出成形法によってはパ
イプの底部を成形することができないため円筒部と底部
とを別々に成形して接着しなければならず、接着部に突
起が形成されたり接着部の強度が著しく低下する等の問
題点が残されていた。(Prior Art) Press forming is the most suitable method for forming bottomed ceramic pipes, but when the overall length of the pipe is long, the yield is reduced and the size of the press forming apparatus is increased. For this reason, extrusion molding is used to mold long pipes, but since the bottom of the pipe cannot be molded using conventional extrusion molding, the cylindrical part and the bottom are molded separately and then glued together. However, there remain problems such as protrusions being formed in the bonded portion and the strength of the bonded portion being significantly reduced.

（発明が解決しようとする問題点） 本発明は上記のような従来の問題点を解決して、全長の
長い有底セラミックパイプを歩留りよく一体成形するこ
とができる有底セラミックパイプの成形方法と、これに
使用される成形装置とを目的として完成されたものであ
る。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides a method for forming a bottomed ceramic pipe that can integrally mold a long bottomed ceramic pipe with a high yield. It was completed for the purpose of forming the molding equipment used in this process.

（問題点を解決するための手段） 本願第１の発明は外側口金の内部にセットされた空気連
通孔付きの内側口金の先端に封孔体を吸着保持させ、外
側口金の先端を閉鎖したうえ外側口金と内側口金との間
に形成される環状空間に流動性のセラミック原料を供給
して有底セラミックパイプの底部付近の部分を成形し、
次に閉鎖口金を取外し内側口金の空気連通孔を大気圧に
開放したうえ流動性のセラミック原料を更に供給して押
出し成形を行い、所望長さの有底セラミックパイプを成
形することを特徴とするものであり、本願第２の発明は
先細状の中空部の先端に円筒状の中空部が形成された外
側口金の内部に、該外側口金よりもわずかに短く、空気
連通孔が透設された円筒状の内側口金をセットするとと
もに、該空気連通孔の基部には内側口金の先端に封孔体
を吸着させるための真空ポンプを接続し、また外側口金
の先端には小孔付きの閉鎖口金を着脱自在に取付けたこ
とを特徴するものである。(Means for Solving the Problems) The first invention of the present application has a sealing body adsorbed and held at the tip of an inner cap with an air communication hole set inside the outer cap, and the tip of the outer cap is closed. Supplying a fluid ceramic raw material to the annular space formed between the outer cap and the inner cap to form a portion near the bottom of the bottomed ceramic pipe,
Next, the closing cap is removed, the air communication hole of the inner cap is opened to atmospheric pressure, and a fluid ceramic raw material is further supplied and extrusion molding is performed to form a bottomed ceramic pipe of a desired length. In the second invention of the present application, an air communication hole is formed inside the outer cap, which has a cylindrical hollow portion formed at the tip of the tapered hollow portion, and is slightly shorter than the outer cap. A cylindrical inner cap is set, and a vacuum pump is connected to the base of the air communication hole for adsorbing the sealing material to the tip of the inner cap, and a closing cap with a small hole is connected to the tip of the outer cap. It is characterized by being detachably attached.

次に図面を参照しつつ本発明を更に詳細に説−明すると
、（１１は真空押出機の押出口、（２）は該押出口＋１
）にボルト（３）によって取付けられた外側口金、（４
）は外側口金（２）の内部にセットされた円筒状の内側
口金である。外側口金（２）は先細状の中空部（５）の
先端に円筒状の中空部（６）が形成されたものであり、
一方向側口金（４）は外側口金（２）よりも全長がわず
かに短かく、支柱（７）によって外側口金（２）の中心
に支持されたものである。内側口金（４）の先端部付近
はその外径より長い長−さにわたって円筒状とされてお
り、外側口金（２）と内側口金（４）との間に形成され
る環状中空部から流動性のセラミック原料がパイプ状に
押出されるようになっている。内側口金（４）の先端面
には円錐台状の凹部（８）が形成されており、内側口金
（４）の中心にはこの凹部（８）に連通ずる空気連通孔
（９）が透設されている。この空気連通孔（９）の基部
は管路（１０）、（１１）を介して真空ポンプ（１２）
に接続されており、空気連通孔（９）の内部を減圧して
先端面の凹部（８）に１円錐形又は円錐台形のパラフィ
ン等の有機質からなる封孔体（１３）を吸着することが
でき、また空気連通孔（９）の内部に大気圧を導入して
封孔体（１３）の吸着を解くこともできるようにされて
いる。（１４）は外側口金（２）の先端にボルト（１５
）によって着脱自在に取付けられた閉鎖口金であって、
その中央部裏面にはパイプの底部成形用の凹部（１６）
が凹設されるとともに、外側口金（２）の中空部（６）
の内径のｌ／１０程度の小孔（１７）が透設されている
。Next, the present invention will be explained in more detail with reference to the drawings. (11 is the extrusion port of the vacuum extruder, (2) is the extrusion port +1
), the outer cap is attached by bolts (3) to (4
) is a cylindrical inner cap set inside the outer cap (2). The outer cap (2) has a cylindrical hollow part (6) formed at the tip of a tapered hollow part (5),
The one-way side cap (4) has a slightly shorter overall length than the outer cap (2), and is supported at the center of the outer cap (2) by a support (7). The vicinity of the tip of the inner mouthpiece (4) is cylindrical over a length longer than its outer diameter, and the annular hollow part formed between the outer mouthpiece (2) and the inner mouthpiece (4) allows fluidity to flow through the inner mouthpiece (4). The ceramic raw material is extruded into a pipe shape. A truncated conical recess (8) is formed on the tip surface of the inner cap (4), and an air communication hole (9) that communicates with this recess (8) is formed in the center of the inner cap (4). has been done. The base of this air communication hole (9) is connected to a vacuum pump (12) via pipes (10) and (11).
It is possible to reduce the pressure inside the air communication hole (9) and adsorb a conical or truncated conical sealing body (13) made of organic material such as paraffin into the concave part (8) on the tip surface. It is also possible to introduce atmospheric pressure into the air communication hole (9) to release the adsorption of the sealing body (13). (14) is a bolt (15) attached to the tip of the outer cap (2).
), the closure cap being removably attached to the
On the back of the central part is a recess (16) for forming the bottom of the pipe.
is recessed, and the hollow part (6) of the outer cap (2)
A small hole (17) with a diameter of about 1/10 of the inner diameter is transparently provided.

次に本発明の有底セラミックパイプの成形方法を説明す
ると、先ず閉鎖口金（１４）を取外した状態で外側口金
（２）及び内側口金（４）の先端付近まで流動性のセラ
ミック原料を押出し、真空ポンプ（１２）を作動させて
内側口金（４）の空気連通孔（９）の内部を１０００〜
２０００ｍＡｑに減圧し、内側口金（４）の先端の四部
（８）内にパラフィンのような焼成時に焼失し得る封孔
体（１３）を吸着保持させる。次に外側口金（２）の先
端に第１図のように閉鎖口金（１４）を取付けたうえで
セラミック原料を更に押出して、外側口金（２）と内側
口金（４）との間に形成される環状空間のみならず内側
口金（４）の先端の封孔体（１３）と閉鎖口金（１４）
との間隙をもセラミック原料で満たし、有底セラミック
パイプの底部付近の部分を成形する。底部の成形が完了
したことは閉鎖口金（１４）の小孔（１７）からセラミ
ック原料が抽出されてくることにより知ることができる
ので、小孔（１７）からの原料抽出開始と同時に押出し
を停止する。次に真空ポンプ（１２）を停止させるとと
もに空気連通孔（９）の内部を大気圧に解放したうえで
閉鎖口金（１４）を取外す。Next, to explain the method for forming a bottomed ceramic pipe of the present invention, first, with the closing cap (14) removed, a fluid ceramic raw material is extruded to the vicinity of the tips of the outer cap (2) and the inner cap (4), Operate the vacuum pump (12) to vacuum the inside of the air communication hole (9) of the inner cap (4) to 1000~
The pressure is reduced to 2000 mAq, and a sealing material (13) such as paraffin that can be burned out during firing is adsorbed and held in the four parts (8) at the tip of the inner mouthpiece (4). Next, a closing cap (14) is attached to the tip of the outer cap (2) as shown in Figure 1, and the ceramic raw material is further extruded to form a gap between the outer cap (2) and the inner cap (4). Not only the annular space but also the sealing body (13) at the tip of the inner cap (4) and the closing cap (14)
The gap between the two is also filled with ceramic raw material, and the part near the bottom of the bottomed ceramic pipe is formed. Completion of molding of the bottom part can be known by the fact that the ceramic raw material is extracted from the small hole (17) of the closed nozzle (14), so the extrusion is stopped at the same time as the raw material extraction starts from the small hole (17). do. Next, the vacuum pump (12) is stopped, the inside of the air communication hole (9) is released to atmospheric pressure, and the closing cap (14) is removed.

このときの閉鎖口金（１４）と成形されたパイプ底面と
の離形性を良くするためには、予め閉鎖口金（１４）の
凹部（１６）に軽油を小量塗布することが効果的である
。その後再びセラミック原料の押出しを行えば、第２図
に示されるように底部内面に封孔体（１３）を付けたま
までパイプ部分の成形が行われる。このとき有底セラミ
ックパイプの内部には内側口金（４）の中心部の空気連
通孔（９）から大気圧の空気が導入されるので、押出速
度を適切に制御して内部の圧力変動を±１００　ｍＡｑ
程度以内にとどめれば、押出成形されたパイプ部分はく
ぼんだりふくらんだりすることはなく、所望長さの有底
セラミックパイプを一体成形することができる。なお、
底部内面に付着している封孔体（１３）は焼成工程にお
いて焼失するので、予め除去する必要はない。In order to improve the releasability between the closure cap (14) and the bottom of the formed pipe at this time, it is effective to apply a small amount of light oil to the recess (16) of the closure cap (14) in advance. . Thereafter, when the ceramic raw material is extruded again, the pipe portion is formed with the sealing body (13) still attached to the inner surface of the bottom, as shown in FIG. At this time, air at atmospheric pressure is introduced into the bottomed ceramic pipe from the air communication hole (9) in the center of the inner mouthpiece (4), so the extrusion speed is appropriately controlled to prevent internal pressure fluctuations. 100mAq
As long as the extrusion-molded pipe portion is kept within a certain degree, the extruded pipe portion will not be depressed or bulged, and a bottomed ceramic pipe of a desired length can be integrally molded. In addition,
The sealing body (13) attached to the inner surface of the bottom part is burned away during the firing process, so there is no need to remove it in advance.

（実施例） 次に本発明の好ましい実施例を示す。(Example) Next, preferred embodiments of the present invention will be shown.

先端部の内径１７．５ｍｍ、後部の内径５００の外側口
金（２）の内部に、先端の円筒部分の長さ１５〜３０關
、外径Ｌ２．Ｏｍで後部の外径８龍の内側口金（４）を
同心状にセットし、その先端の凹部（８）内に試薬−級
のパラフィンからなる最大径８龍、厚さ３１１の円錐台
状の封孔体（１３）を２０００ｕ＋Ａｑ程度の負圧で吸
着保持させた。次に外側口金（２）の先端を中央に２重
−の小孔（１７）を透設した閉鎖口金（１４）で閉鎖し
たうえ、これらの外側口金（２）と内側口金（４）との
環状空間にイツトリアで安定化させたジルコニア原料に
水分２５％、バインダ３％、界面活性剤を添加した流動
性のセラミック原料を押出し、底部付近の部分を成形し
た。その後内側口金（４）の空気連通孔（９）を大気中
に連通させるとともに閉鎖口金（１４）を取外し、１０
０〜２００＋ｎ／分の押出しスピードでパイプ部分を連
続的に押出成形し、歩留り良く全長ＩＬＯＯ鶴の有底セ
ラミックパイプを得た。これを自然乾燥させ、酸化雰囲
気中で１６００℃、３時間の焼成を行うと同時に有底セ
ラミックパイプの底部に付着していた封孔体（１３）を
焼失させたところ、焼成による約２５％の収縮を生じ、
外径１３龍、内径９鶴、全長７５０　龍のジルコニア質
の有底セラミックパイプが得られた。これは固定電解質
センサーとして用いられるものである。なお、セラミッ
ク原料としてはジルコニアの−ほか、アルミナ、ムライ
ト等の他のセラミック原料を用いることもできる。Inside the outer cap (2) with an inner diameter of 17.5 mm at the tip and an inner diameter of 500 mm at the rear, there is a cylindrical portion at the tip with a length of 15 to 30 mm and an outer diameter of L2. Set the rear inner cap (4) with an outer diameter of 8mm concentrically, and insert a truncated cone-shaped cap made of reagent-grade paraffin with a maximum diameter of 8mm and a thickness of 311 mm into the recess (8) at the tip. The sealing body (13) was adsorbed and held under a negative pressure of about 2000 u+Aq. Next, the tip of the outer cap (2) is closed with a closing cap (14) that has a double small hole (17) in the center, and the outer cap (2) and the inner cap (4) are connected to each other. A fluid ceramic raw material prepared by adding 25% moisture, 3% binder, and a surfactant to a zirconia raw material stabilized with ittria was extruded into the annular space, and a portion near the bottom was molded. Thereafter, the air communication hole (9) of the inner cap (4) is communicated with the atmosphere, and the closing cap (14) is removed.
The pipe portion was continuously extruded at an extrusion speed of 0 to 200+n/min to obtain a bottomed ceramic pipe of full length ILOO crane with good yield. This was air-dried and then fired at 1600°C for 3 hours in an oxidizing atmosphere. At the same time, the sealing material (13) attached to the bottom of the bottomed ceramic pipe was burned out. As a result, approximately 25% of the causes contraction,
A bottomed zirconia ceramic pipe with an outer diameter of 13 mm, an inner diameter of 9 mm, and a total length of 750 mm was obtained. This is used as a fixed electrolyte sensor. In addition to zirconia, other ceramic raw materials such as alumina and mullite can also be used as the ceramic raw material.

（発明の効果） 本発明は以上の説明からも明らかなように、全長の長い
有底セラミックパイプを歩留り良く一体成形することが
できるものであるから、従来の問題点を解消した有底セ
ラミックパイプの成形方法及び成形装置として産業の発
展に寄与するところは極めて大である。(Effects of the Invention) As is clear from the above description, the present invention is capable of integrally molding a long bottomed ceramic pipe with a high yield, and therefore it is a bottomed ceramic pipe that solves the conventional problems. The contribution to the development of industry as a molding method and molding device is extremely large.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は底部成形中の本発明の実施例を示す一部切欠正
面図、第２図は同じくパイプ部分成形状態を示す一部切
欠正面図である。 （２）：外側口金、（４）：内側口金、（５）：中空部
、（６）：中空部、（９）：空気連通孔、（１２）：真
空ポンプ、（１４）：閉鎖口金、（１７）　：小孔。FIG. 1 is a partially cutaway front view showing an embodiment of the present invention during bottom forming, and FIG. 2 is a partially cutaway front view showing the pipe portion being formed. (2): Outer cap, (4): Inner cap, (5): Hollow part, (6): Hollow part, (9): Air communication hole, (12): Vacuum pump, (14): Closed cap, (17): Small hole.

Claims (1)

【特許請求の範囲】 １、外側口金の内部にセットされた空気連通孔付きの内
側口金の先端に封孔体を吸着保持させ、外側口金の先端
を閉鎖したうえ外側口金と内側口金との間に形成される
環状空間に流動性のセラミック原料を供給して有底セラ
ミックパイプの底部付近の部分を成形し、次に閉鎖口金
を取外し内側口金の空気連通孔を大気圧に開放したうえ
流動性のセラミック原料を更に供給して押出し成形を行
い、所望長さの有底セラミックパイプを成形することを
特徴とする有底セラミックパイプの成形方法。 ２、先細状の中空部（５）の先端に円筒状の中空部（６
）が形成された外側口金（２）の内部に、該外側口金（
２）よりもわずかに短く、空気連通孔（９）が透設され
た円筒状の内側口金（４）をセットするとともに、該空
気連通孔（９）の基部には内側口金（４）の先端に封孔
体（１３）を吸着させるための真空ポンプ（１２）を接
続し、また外側口金（２）の先端には小孔（１７）付き
の閉鎖口金（１４）を着脱自在に取付けたことを特徴す
る有底セラミックパイプの成形装置。[Scope of Claims] 1. A sealing body is suctioned and held at the tip of an inner cap with an air communication hole set inside the outer cap, the tip of the outer cap is closed, and a space between the outer cap and the inner cap is provided. The part near the bottom of the bottomed ceramic pipe is formed by supplying a fluid ceramic raw material into the annular space formed in the annular space formed by the pipe.Then, the closing cap is removed, the air communication hole in the inner cap is opened to atmospheric pressure, and the fluidity is increased. 1. A method for forming a bottomed ceramic pipe, which comprises further supplying a ceramic raw material and extruding it to form a bottomed ceramic pipe of a desired length. 2. A cylindrical hollow part (6) is provided at the tip of the tapered hollow part (5).
) is formed inside the outer cap (2).
A cylindrical inner cap (4) that is slightly shorter than 2) and has a transparent air communication hole (9) is set, and the tip of the inner cap (4) is set at the base of the air communication hole (9). A vacuum pump (12) for adsorbing the sealing body (13) is connected to the outer cap (2), and a closing cap (14) with a small hole (17) is detachably attached to the tip of the outer cap (2). A bottomed ceramic pipe forming device featuring:
JP22566885A 1985-10-09 1985-10-09 Method and device for molding ceramic pipe with bottom Granted JPS6285906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22566885A JPS6285906A (en) 1985-10-09 1985-10-09 Method and device for molding ceramic pipe with bottom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22566885A JPS6285906A (en) 1985-10-09 1985-10-09 Method and device for molding ceramic pipe with bottom

Publications (2)

Publication Number Publication Date
JPS6285906A true JPS6285906A (en) 1987-04-20
JPH0437762B2 JPH0437762B2 (en) 1992-06-22

Family

ID=16832908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22566885A Granted JPS6285906A (en) 1985-10-09 1985-10-09 Method and device for molding ceramic pipe with bottom

Country Status (1)

Country Link
JP (1) JPS6285906A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923655A (en) * 1987-06-17 1990-05-08 Ngk Insulators, Ltd. Sealing of end faces of ceramic tubes
US5009832A (en) * 1988-03-04 1991-04-23 Ngk Insulators, Ltd. Closed end sleeve producing method and core structure used in the method
EP0987090A2 (en) * 1998-09-19 2000-03-22 Paul Teeuwen GmbH & Co.KG Process and device for making a tubular article , in particular a fence
EP1075916A3 (en) * 1999-08-10 2002-04-03 Praxair Technology, Inc. Process and die for making closed-end ceramic tubes
JP2008531335A (en) * 2005-12-09 2008-08-14 コリア インスティテュート オブ エナジー リサーチ Ceramic membrane tube molding mold and ceramic membrane tube manufacturing method using the same
JP2009083259A (en) * 2007-09-28 2009-04-23 Kubota Matsushitadenko Exterior Works Ltd Extrusion molding die
JP2009083260A (en) * 2007-09-28 2009-04-23 Kubota Matsushitadenko Exterior Works Ltd Extrusion molding die
JP2009283378A (en) * 2008-05-26 2009-12-03 Hitachi Ltd Solid oxide fuel cell tube body, molding method thereof, and manufacturing device therefor
JP2014534602A (en) * 2011-11-30 2014-12-18 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Method for manufacturing tubular fuel cell having cap layer of two layers of support

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923655A (en) * 1987-06-17 1990-05-08 Ngk Insulators, Ltd. Sealing of end faces of ceramic tubes
US5009832A (en) * 1988-03-04 1991-04-23 Ngk Insulators, Ltd. Closed end sleeve producing method and core structure used in the method
US5120210A (en) * 1988-03-04 1992-06-09 Ngk Insulators, Ltd. Core structure for producing closed end sleeve
EP0987090A2 (en) * 1998-09-19 2000-03-22 Paul Teeuwen GmbH & Co.KG Process and device for making a tubular article , in particular a fence
EP0987090A3 (en) * 1998-09-19 2001-10-17 Paul Teeuwen GmbH & Co.KG Process and device for making a tubular article , in particular a fence
EP1075916A3 (en) * 1999-08-10 2002-04-03 Praxair Technology, Inc. Process and die for making closed-end ceramic tubes
JP2008531335A (en) * 2005-12-09 2008-08-14 コリア インスティテュート オブ エナジー リサーチ Ceramic membrane tube molding mold and ceramic membrane tube manufacturing method using the same
JP2009083259A (en) * 2007-09-28 2009-04-23 Kubota Matsushitadenko Exterior Works Ltd Extrusion molding die
JP2009083260A (en) * 2007-09-28 2009-04-23 Kubota Matsushitadenko Exterior Works Ltd Extrusion molding die
JP2009283378A (en) * 2008-05-26 2009-12-03 Hitachi Ltd Solid oxide fuel cell tube body, molding method thereof, and manufacturing device therefor
JP2014534602A (en) * 2011-11-30 2014-12-18 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Method for manufacturing tubular fuel cell having cap layer of two layers of support
US9425466B2 (en) 2011-11-30 2016-08-23 Robert Bosch Gmbh Production method for a tubular fuel cell having a two-layer cap region of the support body

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