JP2521000B2 - Method for manufacturing ceramic molded body - Google Patents
Method for manufacturing ceramic molded bodyInfo
- Publication number
- JP2521000B2 JP2521000B2 JP4094099A JP9409992A JP2521000B2 JP 2521000 B2 JP2521000 B2 JP 2521000B2 JP 4094099 A JP4094099 A JP 4094099A JP 9409992 A JP9409992 A JP 9409992A JP 2521000 B2 JP2521000 B2 JP 2521000B2
- Authority
- JP
- Japan
- Prior art keywords
- molded body
- ceramic molded
- liquid medium
- rubber mold
- pressure liquid
- 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 - Lifetime
Links
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、寸法精度の高いセラミ
ックス成形体を効率的に生産することができるセラミッ
クス成形体の製造方法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 for producing a ceramics compact which can efficiently produce a ceramics compact with high dimensional accuracy.
【０００２】[0002]
【従来の技術】例えば、ナトリウム硫黄電池のベータア
ルミナ管などに使用される有底円筒状のセラミックス成
形体の成形方法としては、キャビティを形成するように
マンドレルを囲ったゴム型をその外表面側から圧力液媒
で加圧し所定形状のセラミックス成形体を成形するコー
ルド・アイソスタティック・プレス方式と称される方法
が広く用いられており、湿式タイプと乾式タイプの２種
類がある。2. Description of the Related Art For example, as a method for forming a cylindrical ceramic body having a bottom and used for a beta-alumina tube of a sodium-sulfur battery, a rubber mold enclosing a mandrel so as to form a cavity is provided on the outer surface side. A method called a cold isostatic press method in which a ceramics compact having a predetermined shape is molded by pressurizing with a pressure liquid medium is widely used, and there are two types, a wet type and a dry type.
【０００３】ところで、前記ベータアルミナ管において
は肉厚条件など厳しい寸法精度が要求されており、寸法
精度の高い製品を得るためには湿式タイプのプレス方法
が適しているのであるが成形速度が２０分／本程度と極
めて遅く効率的な生産を行うことができないという問題
点があった。一方、乾式タイプのプレス方法においては
成形速度が 0.5分／本程度と速く生産性に優れているも
のの、長時間成形を行っているとゴム型が昇温による熱
膨張で変形してキャビティ体積を縮小し寸法通りの製品
を成形することができなくなるとともに、これを防止す
るために頻繁なゴム型交換作業を強いられるという問題
点があった。By the way, the beta-alumina tube is required to have strict dimensional accuracy such as wall thickness conditions, and a wet type pressing method is suitable for obtaining a product with high dimensional accuracy, but the molding speed is 20. There is a problem in that it is not possible to carry out an extremely slow and efficient production of about 1 minute / piece. On the other hand, in the dry type pressing method, the molding speed is as high as 0.5 minutes / piece and the productivity is excellent, but if molding is performed for a long time, the rubber mold is deformed by thermal expansion due to temperature rise and the cavity volume is reduced. There is a problem that it is not possible to form a product that is reduced in size and sized, and in order to prevent this, frequent rubber mold replacement work is forced.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、乾式タイプのプレス方法であ
って高い成形速度で寸法精度の高いセラミックス成形体
を効率的に生産することができるとともに、長時間成形
を行ってもゴム型の変形を生じさせることがなくゴム型
の交換作業をしなくても寸法精度の高いセラミックス成
形体の生産を持続することができるセラミックス成形体
の製造方法を提供することを目的として完成されたもの
である。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and is a dry type pressing method, which efficiently produces a ceramics compact with high dimensional accuracy at a high compaction speed. In addition to being able to perform molding for a long time, it does not cause deformation of the rubber mold and can continue production of ceramic molded products with high dimensional accuracy without rubber mold replacement work. The present invention has been completed for the purpose of providing a manufacturing method of.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた第１の発明のセラミックス成形体の製造方
法は、マンドレルとゴム型とで形成されるキャビティ内
にセラミックス原料を充填後、前記ゴム型の外表面側に
圧力液媒を注入してセラミックス成形体を加圧成形する
セラミックス成形体の製造方法において、前記圧力液媒
の温度を恒温槽を用いて一定に保持することを特徴とす
るものである。また第２の発明のセラミックス成形体の
製造方法は、マンドレルとゴム型とで形成されるキャビ
ティ内にセラミックス原料を充填後、前記ゴム型の外表
面側に圧力液媒を注入してセラミックス成形体を加圧成
形するセラミックス成形体の製造方法において、前記圧
力液媒の温度を恒温槽を用いて一定に保持するととも
に、前記マンドレルとゴム型から成る成形型の温度をも
一定に保持することを特徴とするものである。 Method for producing Serra mix molded article of the first aspect of the present invention made for solving the above problems BRIEF SUMMARY OF THE INVENTION are filled with ceramic material into the cavity formed by the mandrel and the rubber-type Then, in the method for producing a ceramic molded body, in which a pressure liquid medium is injected to the outer surface side of the rubber mold to pressure-mold the ceramic molded body, the pressure liquid medium is used.
It is characterized in that the temperature of is kept constant by using a constant temperature bath . In addition, the ceramic molded body of the second invention
The manufacturing method is a cab formed by a mandrel and a rubber mold.
After the ceramic material is filled in the tee, the outer surface of the rubber mold is
A pressure liquid medium is injected into the surface side to pressurize the ceramic molded body.
In the method for producing a shaped ceramic molded body,
Keeping the temperature of the hydraulic fluid constant using a thermostatic bath
In addition, the temperature of the mold consisting of the mandrel and rubber mold
It is characterized by being held constant.
【０００６】[0006]
【実施例】次に、本発明を図示の実施例について詳細に
説明する。図面はナトリウム硫黄電池のベータアルミナ
管に使用される有底円筒状のセラミックス成形体２０の
成形工程を示すもので、図中１は圧力容器、２は蓋体、
３は成形すべきセラミックス成形体の内形状に対応した
所定形状を有するマンドレル、４は該マンドレル３との
間に一定厚みの隙間からなるキャビティを形成するよう
囲った内外２層のバックからなるゴム型である。前記の
圧力容器１内には成形中におけるマンドレルとゴム型の
温度上昇を抑制するための冷却用流体の循環通路５が配
設されており、また圧力容器１とゴム型４との間には該
ゴム型４の外表面側に圧力液媒を注入するための注入路
６が設けられている。The present invention will now be described in detail with reference to the illustrated embodiments. The drawing shows a forming process of a bottomed cylindrical ceramic molded body 20 used for a beta-alumina tube of a sodium-sulfur battery, in which 1 is a pressure vessel, 2 is a lid,
3 is a mandrel having a predetermined shape corresponding to the inner shape of the ceramic molded body to be molded, 4 is a rubber consisting of an inner and outer two-layered bag surrounded by a mandrel 3 so as to form a cavity having a gap of a constant thickness. It is a type. A circulation passage 5 for a cooling fluid for suppressing a temperature rise of the mandrel and the rubber mold during molding is arranged in the pressure container 1, and between the pressure container 1 and the rubber mold 4. An injection path 6 for injecting a pressure liquid medium is provided on the outer surface side of the rubber mold 4.
【０００７】前記の注入路６には、切替え弁７を介して
圧力液媒の貯蔵タンク８が連結されているとともに該貯
蔵タンク８には高圧ポンプ９が連結され、圧力液媒が所
定の圧力値で圧力容器１内に供給されるよう構成されて
いる。また、前記圧力液媒の貯蔵タンク８には恒温槽１
０が連結されて、貯蔵タンク８内における圧力液媒の温
度を常に所定値となるよう加温あるいは冷却しており、
圧力容器１内に供給する圧力液媒の温度を常時一定に維
持している。A storage tank 8 for a pressure liquid medium is connected to the injection passage 6 through a switching valve 7, and a high pressure pump 9 is connected to the storage tank 8 so that the pressure liquid medium has a predetermined pressure. The value is supplied to the pressure vessel 1. Further, the storage tank 8 for the pressure liquid medium has a constant temperature bath 1
0 is connected to heat or cool the temperature of the pressure liquid medium in the storage tank 8 to a predetermined value at all times.
The temperature of the pressure liquid medium supplied into the pressure vessel 1 is always kept constant.
【０００８】本発明においては、マンドレル３とゴム型
４とで形成されるキャビティ内にセラミックス原料を充
填後、前記ゴム型４の外表面側に注入路６より圧力液媒
を注入してセラミックス成形体を加圧成形する点は従来
のこの種乾式タイプのプレス方法と同様であるが、前記
圧力容器１内には成形中におけるマンドレルとゴム型か
ら成る成形型の温度上昇を抑制するための冷却用流体の
循環通路５が配設されており恒温槽１０により例えば常
に２０度（プラスマイナス１度の範囲内）となるよう加
熱あるいは冷却処理されている。また前記の圧力液媒は
恒温槽１０により例えば常に２０度（プラスマイナス１
度の範囲内）となるよう加熱あるいは冷却処理されてお
り、従って、前記ゴム型４の外表面側に供給される圧力
液媒の温度は一定となってゴム型４が温度変化により熱
膨張あるいは熱収縮することなく常に所定の形状を保持
することとなる。この結果、前記キャビティ内の容積は
常に一定となり成形されるセラミックス成形体２０は寸
法精度に優れた所定形状のものとなる。このようにして
加圧成形されたセラミックス成形体２０は、前記圧力液
媒の供給を中止して加圧を解除すると同時に蓋体２を取
り除き、マンドレル３とともに圧力容器１から取り出さ
れ、以下同様の手順により寸法精度に優れたセラミック
ス成形体２０を効率よく連続生産することとなる。な
お、前記成形型と前記圧力液媒の温度制御は第２の発明
のように両方行うことが好ましいが、第１の発明のよう
に圧力液媒のみの温度制御であっても前記効果は達成さ
れる。In the present invention, after the ceramic raw material is filled in the cavity formed by the mandrel 3 and the rubber mold 4, the pressure liquid medium is injected into the outer surface of the rubber mold 4 from the injection passage 6 to form the ceramic. The point that the body is pressure-molded is the same as the conventional dry type pressing method, but the inside of the pressure vessel 1 is cooled to suppress the temperature rise of the mold including the mandrel and the rubber mold during molding. A circulation passage 5 for the working fluid is provided and is heated or cooled by a constant temperature bath 10 so that the temperature is always 20 degrees (within a range of plus or minus 1 degree). Further, the pressure liquid medium is constantly kept at 20 degrees (plus or minus 1
The temperature of the pressure liquid medium supplied to the outer surface side of the rubber mold 4 is constant, and the rubber mold 4 thermally expands or changes due to temperature change. A predetermined shape is always maintained without heat shrinkage. As a result, the volume inside the cavity is always constant, and the molded ceramic body 20 has a predetermined shape with excellent dimensional accuracy. The ceramic molded body 20 pressure-molded in this way is taken out of the pressure container 1 together with the mandrel 3 by simultaneously removing the pressure by stopping the supply of the pressure liquid medium, removing the lid 2, and so on. By the procedure, the ceramic molded body 20 having excellent dimensional accuracy can be efficiently produced continuously. The temperature control of the molding die and the pressure liquid medium is the second invention.
It is preferable to do both as in the above, but like the first invention
Even when the temperature of only the pressure liquid medium is controlled, the above effect can be achieved.
【０００９】実施例の方法に従って外径４０mmのベータ
アルミナ管用の有底円筒状セラミックス成形体を成形
し、得られたセラミックス成形体１０００本の所定箇所
の肉厚測定を行った結果、表１に示される通り全てが許
容肉厚公差（2.10〜2.18mm）の範囲内であり良品の歩留
り率は１００％であった。なお、従来の乾式プレス方法
により同様のセラミックス成形体を成形して肉厚測定を
行った結果を比較例として示したが、肉厚のバラツキが
大きくて良品の歩留り率は６２％と低くなり本発明の優
れた効果が確認できた。According to the method of the example , a bottomed cylindrical ceramic molded body for a beta-alumina tube having an outer diameter of 40 mm was molded, and the thickness of 1000 obtained ceramic molded bodies was measured. As shown, all were within the allowable thickness tolerance (2.10 to 2.18 mm), and the yield rate of good products was 100%. In addition, the result of measuring the wall thickness by molding a similar ceramics molded body by the conventional dry pressing method is shown as a comparative example, but the variation in the wall thickness is large, and the yield rate of the non-defective product is as low as 62%. The excellent effect of the invention was confirmed.
【００１０】[0010]
【表１】 （ｎ＝１０００本）[Table 1] (N = 1000)
【００１１】[0011]
【発明の効果】以上の説明からも明らかなように、本発
明は乾式タイプのプレス方法であって高い成形速度で寸
法精度の高いセラミックス成形体を効率的に生産するこ
とができるとともに、長時間成形を行ってもゴム型の変
形を生じさせることがなくゴム型の交換作業をしなくて
も寸法精度の高いセラミックス成形体の生産を持続する
ことができるものである。よって本発明は従来の問題点
を一掃したセラミックス成形体の製造方法として、産業
の発展に寄与するところは極めて大である。As is apparent from the above description, the present invention is a dry type pressing method, which is capable of efficiently producing a ceramics compact with high dimensional accuracy at a high compacting speed and for a long time. Even if the molding is performed, the deformation of the rubber mold does not occur, and the production of the ceramic molded body with high dimensional accuracy can be continued without exchanging the rubber mold. Therefore, the present invention is extremely large in that it contributes to industrial development as a method for producing a ceramic molded body that eliminates the conventional problems.
【図１】本発明の実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
３ マンドレル ４ ゴム型 １０ 恒温槽 ２０ セラミックス成形体 3 Mandrel 4 Rubber type 10 Constant temperature bath 20 Ceramic molded body
Claims (2)
ビティ内にセラミックス原料を充填後、前記ゴム型の外
表面側に圧力液媒を注入してセラミックス成形体を加圧
成形するセラミックス成形体の製造方法において、前記
圧力液媒の温度を恒温槽を用いて一定に保持することを
特徴とするセラミックス成形体の製造方法。1. A ceramic molded body in which a ceramic raw material is filled in a cavity formed by a mandrel and a rubber mold, and a pressure liquid medium is injected into the outer surface side of the rubber mold to pressure-mold the ceramic molded body. in the manufacturing method, the
A method for producing a ceramic molded body, characterized in that the temperature of a pressure liquid medium is kept constant by using a constant temperature bath .
ビティ内にセラミックス原料を充填後、前記ゴム型の外After filling the ceramics raw material in the
表面側に圧力液媒を注入してセラミックス成形体を加圧Pressurize the ceramic compact by injecting a pressure liquid medium to the surface side
成形するセラミックス成形体の製造方法において、前記In the method for producing a ceramic molded body to be molded,
圧力液媒の温度を恒温槽を用いて一定に保持するとともWhen the temperature of the pressure liquid medium is kept constant using a thermostatic bath,
に、前記マンドレルとゴム型から成る成形型の温度をもIn addition, the temperature of the mold consisting of the mandrel and rubber mold
一定に保持することを特徴とするセラミックス成形体のA ceramic molded body characterized by being held constant
製造方法。Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4094099A JP2521000B2 (en) | 1992-04-14 | 1992-04-14 | Method for manufacturing ceramic molded body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4094099A JP2521000B2 (en) | 1992-04-14 | 1992-04-14 | Method for manufacturing ceramic molded body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05285926A JPH05285926A (en) | 1993-11-02 |
| JP2521000B2 true JP2521000B2 (en) | 1996-07-31 |
Family
ID=14101003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4094099A Expired - Lifetime JP2521000B2 (en) | 1992-04-14 | 1992-04-14 | Method for manufacturing ceramic molded body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521000B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182343B (en) * | 2016-08-17 | 2018-11-27 | 上海电气钠硫储能技术有限公司 | A kind of sodium-sulphur battery solid electrolyte ceramic pipe forming method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62273809A (en) * | 1986-05-23 | 1987-11-27 | 株式会社日立製作所 | Manufacture of thin green ceramic pipe |
| JPH07100323B2 (en) * | 1988-01-29 | 1995-11-01 | 日機装株式会社 | Isotropic pressure forming equipment |
-
1992
- 1992-04-14 JP JP4094099A patent/JP2521000B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05285926A (en) | 1993-11-02 |
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