JPS61258707A - Method of molding ceramic turbine - Google Patents
Method of molding ceramic turbineInfo
- Publication number
- JPS61258707A JPS61258707A JP10103785A JP10103785A JPS61258707A JP S61258707 A JPS61258707 A JP S61258707A JP 10103785 A JP10103785 A JP 10103785A JP 10103785 A JP10103785 A JP 10103785A JP S61258707 A JPS61258707 A JP S61258707A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- water
- slurry
- soluble
- ceramic turbine
- 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
Landscapes
- Producing Shaped Articles From Materials (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）
本発明はセラミックの成形法である泥漿鋳込成形におい
て鋳込型に水溶性鋳型を使用し複雑型状品全成形する方
法に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for completely molding a complex-shaped product using a water-soluble mold as a casting mold in slurry casting, which is a ceramic molding method. .
（従来の技術）
従来泥漿鋳込法を利用してタービン形状を成形する場合
、羽根部に相当するピースを石膏で製作し泥漿が固化し
た後離型をするが、この時石膏界面と成形体の吸着面の
結合力が成形体強度よシも頑強で羽根部が破損するとい
う現象が多発していた。これを防止する羽根部に相当す
る材質全Ｓｌゴム等の非吸水性にして他の部分を石膏で
作成し下方よシ一方向に凝固させる方式を取っていたが
泥漿の固化時間が長く１２〜４８時間も必要でらった。(Prior art) When molding a turbine shape using the conventional slurry casting method, pieces corresponding to the blades are made of plaster and released from the mold after the slurry has solidified. At this time, the plaster interface and the molded body The bonding force of the suction surface was stronger than the strength of the molded product, and there were many cases where the blades were damaged. To prevent this, the material corresponding to the blade part was made of non-water absorbing material such as all-Sil rubber, and the other parts were made of plaster and solidified downward in one direction, but it took a long time for the slurry to solidify. It took me 48 hours.
（発明が解決しようとする問題点）
タービン形状のような羽根部が薄肉の場合、石膏等の吸
水型では離形時にクラックが生じ成形が困難であシ又Ｓ
ｔゴム等の重水性型金用いて成形した場合においてもゴ
ム型の離型時に羽根部の破損が著しく、ｉたセラミック
のグリーン成形体強度よシも鋳型強度が強いためグリー
ンが収縮を起こす時に鋳型の拘束によシ、羽根部にクラ
ックが生じ易いという問題点があった。(Problems to be Solved by the Invention) When the blade part is thin, such as in a turbine shape, a water-absorbing mold made of plaster or the like may crack when released from the mold, making it difficult to mold.
Even when molding is performed using a heavy water-based mold such as T-rubber, the blades are severely damaged when the rubber mold is released, and the strength of the mold is stronger than that of ceramic green moldings, so when the green shrinks. There was a problem that cracks were likely to occur in the blades due to the restriction of the mold.
本発明は上記問題点を解決し、薄肉形状のタービン等の
形状を成形する際に、泥漿中の水分を吸収する事により
泥漿を固化させると同時に鋳型強度が低下する水溶性鋳
型を利用した、セラミックタービンの成形方法を提供す
る事を目的とする。The present invention solves the above problems and utilizes a water-soluble mold that solidifies the slurry by absorbing water in the slurry and at the same time reduces mold strength when molding a thin-walled turbine or other shape. The purpose is to provide a method for forming ceramic turbines.
（問題点を解決するための手段）
本発明者らは上記の目的を達成するために鋭意検討を重
ね、塩類の水溶液による難水溶性骨材の結合について研
究を行った結果、塩類及び骨材の種類を適当に選定すれ
ば強固な結合の鋳型が得られ、これを用いてスリップキ
ャストを行なえば、スラリーからの吸水によシスラリ−
を固化させると同時に鋳型の強度が低下する性質を有す
る鋳型を得られることを見い出し、この鋳型を用いるこ
とによシセラミックタービンの成形が容易に行なえるよ
うになった。本発明において、骨材としては、粉状また
は粒状のアルミナ、ケイ砂等の耐火物を用いることがで
きる。又水溶性無機化合物としては炭酸カリクム、炭酸
マグネシクム等の炭酸塩、硫酸マグネシウム等の硫酸塩
の水溶性を有する化合物が用いられる。特に骨材として
アルミナ１００、ｌｉ＋に水溶性無機化合物として炭酸
カリウム５〜３０ｐＱ配合することによシ、本発明の目
的達成のためにすぐれた水溶性鋳型が得られる。炭酸カ
リウムの添加量を５〜３０ｇとし九のは５ｇ以下の場合
乾燥時の強度が低く、３０１以上であると強度は高いが
多量の水を吸収しないと強度が低下しないためである。(Means for Solving the Problems) In order to achieve the above object, the present inventors have made extensive studies and have conducted research on the bonding of poorly water-soluble aggregates using an aqueous solution of salts. If you select the appropriate type of slurry, you can obtain a mold with a strong bond, and if you perform slip casting using this, the cis slurry will absorb water from the slurry.
It has been discovered that it is possible to obtain a mold that has the property of reducing the strength of the mold at the same time as it solidifies, and by using this mold it has become possible to easily mold a ceramic turbine. In the present invention, refractory materials such as powdered or granular alumina and silica sand can be used as the aggregate. As the water-soluble inorganic compound, compounds having water solubility such as carbonates such as potassium carbonate and magnesium carbonate, and sulfates such as magnesium sulfate are used. In particular, by blending 5 to 30 pQ of potassium carbonate as a water-soluble inorganic compound with alumina 100, li+ as an aggregate, an excellent water-soluble mold can be obtained to achieve the object of the present invention. This is because when the amount of potassium carbonate added is 5 to 30 g, and the amount of potassium carbonate added is 5 g or less, the strength upon drying is low, and when it is 301 or more, the strength is high, but the strength does not decrease unless a large amount of water is absorbed.
以下、実施例によシ本発明を説明する。The present invention will be explained below with reference to Examples.
（実施例１）
骨材アルミナ１００ｇに対して炭酸カリウム】５Ｉ、水
１５．ｐｉ添加して十分に混合した混合物を用いタービ
ンの羽根部鋳凰形状につき固め、この鋳型を乾燥後、本
発明による製造方法で成形するために第１図に示すよう
に水溶性鋳型を作成し念。泥漿はＳｌ、Ｎ４を９０チ、
２１Ｒ凝固溶体を３チ、Ｙ２Ｏ３を７チの混合粉末に、
Ａｔ２０．４〜６チ添加して原料粉末とし、該原料粉末
１００ｙに対して水２８ＣＣと解膠剤］＋Ｊ−それぞれ
添加してゾールミルにて２０時間分散させ作成した。(Example 1) Potassium carbonate per 100g of aggregate alumina] 5I, water 15. A well-mixed mixture with the addition of PI was used to harden it into the shape of a turbine blade casting, and after drying this mold, a water-soluble mold was created as shown in Fig. 1 in order to be molded by the manufacturing method of the present invention. Just in case. The slurry is 90cm of Sl and N4.
21R solidified solution was mixed into a powder mixture of 3 cm and Y2O3 was mixed into 7 cm.
A raw material powder was prepared by adding 20.4 to 6 g of At, and 28 cc of water and a deflocculant]+J- were added to 100 y of the raw material powder, and dispersed in a sol mill for 20 hours.
この泥漿を第１回の鋳型に鋳込み成形体を得た。This slurry was cast into the first mold to obtain a molded body.
水溶性鋳型は泥漿接触部は自己崩解し離型は容易に出来
、成形体収縮時のクラックも存在せず良好であった。The water-soluble mold was good because the parts in contact with the slurry were self-disintegrating, the mold was easily released, and there were no cracks during shrinkage of the molded product.
（発明の効果）
以上に述べた如く、水溶性鋳型をタービン形状に用いる
事は離型時の割れや鋳型内部での成形体収縮の割れを防
止する事が可能な極めて有効な成形方法である。(Effects of the Invention) As described above, using a water-soluble mold for the turbine shape is an extremely effective molding method that can prevent cracks during mold release and cracks caused by shrinkage of the molded product inside the mold. .
第１図は本発明による製造方法の実施例を示す鋳型の断
面図である。
１：水溶性鋳型、２ ： Ｓｔゴム型、３：押泥漿部、
４：固定枠、５；セラミック成形体。
第 １ 図
１・・・水溶性鋳型
２・・・Ｓｔゴム型
３、・・・押泥漿部
４、・・・固定枠
５、・・・セラミック成形体FIG. 1 is a sectional view of a mold showing an embodiment of the manufacturing method according to the present invention. 1: water-soluble mold, 2: St rubber mold, 3: extrusion slurry part,
4: Fixed frame, 5: Ceramic molded body. 1. Figure 1...Water-soluble mold 2...St rubber mold 3,...Pushing slurry part 4,...Fixed frame 5,...Ceramic molded body
Claims (1)
形において、成形用鋳型として粉状又は粒状の難水溶性
骨材に水溶性無機塩を添加した水溶性鋳型を用いる事を
特徴とするセラミックタービンの成形方法。1) A method for forming a ceramic turbine, which is characterized in that a water-soluble mold in which a water-soluble inorganic salt is added to powdered or granular poorly water-soluble aggregate is used as a forming mold in forming a ceramic turbine by a slip casting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10103785A JPS61258707A (en) | 1985-05-13 | 1985-05-13 | Method of molding ceramic turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10103785A JPS61258707A (en) | 1985-05-13 | 1985-05-13 | Method of molding ceramic turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61258707A true JPS61258707A (en) | 1986-11-17 |
Family
ID=14289962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10103785A Pending JPS61258707A (en) | 1985-05-13 | 1985-05-13 | Method of molding ceramic turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61258707A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089186A (en) * | 1990-07-11 | 1992-02-18 | Advanced Plastics Partnership | Process for core removal from molded products |
| US5248552A (en) * | 1990-07-11 | 1993-09-28 | Advanced Plastics Partnership | Molding core |
| US5252273A (en) * | 1990-05-30 | 1993-10-12 | Hitachi, Ltd. | Slip casting method |
| US5262100A (en) * | 1990-07-11 | 1993-11-16 | Advanced Plastics Partnership | Method of core removal from molded products |
-
1985
- 1985-05-13 JP JP10103785A patent/JPS61258707A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5252273A (en) * | 1990-05-30 | 1993-10-12 | Hitachi, Ltd. | Slip casting method |
| US5089186A (en) * | 1990-07-11 | 1992-02-18 | Advanced Plastics Partnership | Process for core removal from molded products |
| US5248552A (en) * | 1990-07-11 | 1993-09-28 | Advanced Plastics Partnership | Molding core |
| US5262100A (en) * | 1990-07-11 | 1993-11-16 | Advanced Plastics Partnership | Method of core removal from molded products |
| USRE35334E (en) * | 1990-07-11 | 1996-09-24 | Advanced Plastics Partnership | Process for core removal from molded products |
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