JPH0811274B2 - Method for manufacturing precision casting mold - Google Patents
Method for manufacturing precision casting moldInfo
- Publication number
- JPH0811274B2 JPH0811274B2 JP62308720A JP30872087A JPH0811274B2 JP H0811274 B2 JPH0811274 B2 JP H0811274B2 JP 62308720 A JP62308720 A JP 62308720A JP 30872087 A JP30872087 A JP 30872087A JP H0811274 B2 JPH0811274 B2 JP H0811274B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- zirconia
- mold
- wax pattern
- precision casting
- 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
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はチタン及びチタン合金などの活性金属材料の
精密鋳造品を製造する際に用いられる鋳型の製造方法に
関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a mold used for producing a precision casting of an active metal material such as titanium and a titanium alloy.
〔従来の技術〕 チタン及びチタン合金は溶融状態において極めて活性
な材料であるため、この材料の鋳造品を製造する場合は
溶融状態のチタンと反応性の低い黒鉛を材料とした鋳型
が一般に用いられてきた。[Prior Art] Titanium and titanium alloys are extremely active materials in the molten state, so when manufacturing cast products of this material, a mold made of graphite having low reactivity with titanium in the molten state is generally used. Came.
チタン及びチタン合金は溶融状態において極めて活性
で、このためチタン及びチタン合金の鋳造品を製造する
場合、鉄系、銅系、アルミニウム系等の金属の鋳造品を
製造する場合に一般に用いられてきたケイ砂、ジルコン
砂、アルミナ、ムライト等の鋳型材料は使用することが
できない。このため従来、チタン及びチタン合金の鋳造
用鋳型材料としては化学的に安定性の高い黒鉛が用いら
れているが、この黒鉛も溶融状態のチタンとの反応が皆
無ではなく、鋳造品の鋳型と接触していた鋳肌面には数
百ミクロンメートルのチタンとカーボンの反応層が生成
されており、この反応層を除去する必要があつた。Titanium and titanium alloys are extremely active in the molten state, and as a result, they have been generally used for producing cast products of titanium and titanium alloys, and for producing cast products of metals such as iron, copper and aluminum. Molding materials such as silica sand, zircon sand, alumina and mullite cannot be used. For this reason, conventionally, graphite having high chemical stability is used as a casting mold material for titanium and titanium alloys, but this graphite also has no reaction with titanium in a molten state, and is used as a casting mold. A reaction layer of titanium and carbon of several hundreds of micrometers was formed on the surface of the casting surface that was in contact, and it was necessary to remove this reaction layer.
本発明は上記技術水準に鑑み、黒鉛よりもさらに化学
的安定性が高く、溶融状態のチタン及びチタン合金と反
応性の低い鋳型を提供しようとするものである。In view of the above-mentioned state of the art, the present invention is to provide a mold having higher chemical stability than graphite and low reactivity with molten titanium and titanium alloys.
本発明はジルコニア微粉末、水溶性高分子物質及び溶
媒を主成分として含むスラリーに、ワツクスパターンを
浸漬し、該スラリーを付着した該ワツクスパターンを乾
燥して該ワツクスパターン上にジルコニア塗膜層を形成
し、その外側に精密鋳造用シエル鋳型とするバツクアツ
プシエル層を形成させ、次いでワツクスパターンを除去
した後、焼成することを特徴とする精密鋳造用鋳型の製
造方法である。The present invention involves dipping a wax pattern in a slurry containing zirconia fine powder, a water-soluble polymer and a solvent as main components, drying the wax pattern to which the slurry is adhered, and coating the wax pattern with zirconia. A method for producing a precision casting mold, comprising forming a film layer, forming a back-up shell layer on the outer side thereof as a precision casting shell mold, removing the wax pattern, and then firing.
本発明の一実施態様をあげ本発明を具体的に説明す
る。The present invention will be specifically described with reference to one embodiment of the present invention.
ジルコニア微粉末に、結合材として水溶性高分子物質
及び溶媒として水もしくアルコール系溶媒を加え、必要
に応じ、分散剤として界面活性剤及びチクソトロピー性
改善のための可塑剤を添加し、浮針で混合する。該スラ
リーをワツクスパターン上に浸漬もしくは塗布により付
着させ、その後自然乾燥させることにより、ジルコニア
塗膜層を形成させる。さらにこの塗膜層の外側に一般的
な精密鋳造用シエル鋳型製作方法に従いジルコン砂、ア
ルミナ、ケイ砂、ムライト等でバツクアツプし、シエル
を形成する。その後、ワツクスパターン除去し、焼成す
ることにより、ジルコニア塗膜層内の高分子分質を除去
し、ジルコニアのみで形成された塗膜層を表面に有する
チタン及びチタン合金用鋳型を得る。Zirconia fine powder, water-soluble polymeric substance as a binder and water or alcohol solvent as a solvent, if necessary, a surfactant as a dispersant and a plasticizer for improving thixotropy are added, Mix with. The slurry is applied onto the wax pattern by dipping or coating, and then naturally dried to form a zirconia coating layer. Further, the shell is formed on the outside of this coating layer by backing up with zircon sand, alumina, silica sand, mullite or the like according to a general method for producing a shell mold for precision casting. Then, the wax pattern is removed and the mixture is fired to remove the polymer quality in the zirconia coating layer, and a titanium and titanium alloy template having a coating layer formed of only zirconia on the surface is obtained.
焼成によつて形成された鋳型表面のジルコニア塗膜は
他成分のバインダーなどを有せず、化学的に安定であ
り、溶融したチタン及びチタン合金を鋳型内に注入した
際、ジルコン砂、アルミナ、ムライト、黒鉛など通常の
鋳型材料と溶融金属との接触及びそれに伴うチタンと鋳
型材料との反応を防止し、これにより健全な鋳肌層を有
するチタン及びチタン合金鋳造品が製造できる。The zirconia coating film on the mold surface formed by firing has no binder of other components, etc., and is chemically stable, when molten titanium and titanium alloy are injected into the mold, zircon sand, alumina, It is possible to prevent titanium and titanium alloy castings having a sound casting skin layer by preventing contact between molten metal and ordinary casting materials such as mullite and graphite and the accompanying reaction between titanium and the casting materials.
以下、本発明の具体的な実施例をあげ本発明を更に詳
述する。Hereinafter, the present invention will be described in more detail with reference to specific examples of the present invention.
ジルコニアスラリーの調製例１ 平均粒径１μｍ以下の安定化ジルコニア微粉末10gに
対し、６％のポリアクリル酸水溶液にアンモニア水を添
加しpH8.0以上に調整したものを２〜10cc加え、乳鉢に
てよく混合する。これによりジルコニア粒子表面にポリ
アクリル酸を吸着させた状態をつくる。これにポリアク
リル−スチレン系共重合体エマルジヨン〔亜細亜工業
（株）製商品名2460D〕を１〜3cc及びエタノールを10〜
20cc加えることにより、ワツクス表面に付着する適正な
表面張力と粘稠度を有するジルコニア粒子が均一に分散
したスラリーを得る。Preparation Example of Zirconia Slurry 1 To 10 g of stabilized zirconia fine powder having an average particle size of 1 μm or less, 2 to 10 cc of 6% polyacrylic acid aqueous solution added with ammonia water and adjusted to pH 8.0 or more is added to a mortar Mix well. This creates a state in which polyacrylic acid is adsorbed on the surface of the zirconia particles. 1 to 3 cc of polyacryl-styrene copolymer emulsion (trade name: 2460D manufactured by Asia Industry Co., Ltd.) and 10 to 10 parts of ethanol.
By adding 20 cc, a slurry is obtained in which zirconia particles having an appropriate surface tension and consistency attached to the wax surface are uniformly dispersed.
ジルコニアスラリー調製例２ 平均粒径１μｍ以下の安定化ジルコニア微粉末10gに
対し、ポリカルボン酸１〜2g、フツ素系界面活性剤0.1
〜0.3g、水９〜15gを添加し、乳鉢でよく混合してスラ
リーを得る。Preparation Example 2 of Zirconia Slurry 1 to 2 g of polycarboxylic acid and 0.1% of fluorine-based surfactant to 10 g of stabilized zirconia fine powder having an average particle size of 1 μm or less.
Add ~ 0.3g and water 9 ~ 15g and mix well in a mortar to obtain a slurry.
シエル鋳型の製作例 ワツクスパターンを上記１、２のいずれかの調製例で
調製したジルコニアスラリーの中に浸漬後引上げ、自然
乾燥させることによりワツクスパターン上にジルコニア
塗膜層を形成させる。必要ならばこれを数回繰り返すこ
とにより厚みを増大させてもよい。Example of Production of Shell Mold A wax pattern is immersed in the zirconia slurry prepared in any one of the preparation examples 1 and 2 above, then pulled up and naturally dried to form a zirconia coating layer on the wax pattern. If necessary, this may be repeated several times to increase the thickness.
そのジルコニア塗膜層の上に、一般的に精密鋳造用シ
エル鋳型製作に用いられている手法でバツクアツプシエ
ル層を形成させる。たとえば、コロイダルシリカ水溶液
にジルコンフラワーを添加したスラリーに、上記ジルコ
ニア塗膜層を形成したワツクスパターンを浸漬後引き上
げ、自然乾燥してジルコンフラワーバツクアツプ層を形
成させる。さらに、その上に上述のコロイダルシリカ水
溶液にジルコンフラワーを添加したスラリーをバインダ
ーとして、ムライト等の粗粒のバツクアツプ層を形成す
る。A back-up shell layer is formed on the zirconia coating layer by a method generally used for producing a shell mold for precision casting. For example, the wax pattern having the zirconia coating layer formed thereon is dipped in a slurry prepared by adding zircon flour to an aqueous colloidal silica solution, and then pulled up and naturally dried to form a zircon flower back-up layer. Further, a back-up layer of coarse particles such as mullite is formed thereon by using the slurry prepared by adding zircon flour to the above colloidal silica aqueous solution as a binder.
最後に、上述のようにして得たものを、オートクレー
ブを用い鋳型よりワツクスを脱ロウさせた後、焼成炉に
て1000℃で１時間焼成することにより、ジルコニア塗膜
層を有するチタン及びチタン合金精密鋳造用シエル鋳型
を得る。Finally, after dewaxing the wax from the mold using an autoclave, the product obtained as described above is fired at 1000 ° C. for 1 hour in a firing furnace to obtain titanium and titanium alloys having a zirconia coating layer. Obtain a shell mold for precision casting.
上記の方法で得た鋳型の一部欠載斜視図を第１図に、
また第１図の一部断面拡大図を第２図に示す。図におい
て、１は鋳型、２はジルコニア塗膜層、３はジルコンフ
ラワーバツクアツプ層、４はムライト粗粒バツクアツプ
層である。A partially omitted perspective view of the mold obtained by the above method is shown in FIG.
An enlarged view of a partial cross section of FIG. 1 is shown in FIG. In the figure, 1 is a template, 2 is a zirconia coating layer, 3 is a zircon flower back-up layer, and 4 is a mullite coarse grain back-up layer.
本発明によれば、ジルコニア塗膜層を表面に有する鋳
型が製造でき、チタン及びチタン合金を真空もしくは不
活性ガス雰囲気下で溶解、注湯、凝固させることによ
り、鋳肌表面に鋳型との反応層を有しない健全なチタン
及びチタン合金鋳造品を製造することができる。According to the present invention, a mold having a zirconia coating layer on its surface can be produced, and titanium and titanium alloys are melted, poured, and solidified under a vacuum or an inert gas atmosphere to react with the mold on the surface of the casting surface. Sound titanium and titanium alloy castings without layers can be produced.
第１図は本発明の一実施例で製造された鋳型の一部欠載
斜視図、第２図は第１図の一部断面拡大図である。FIG. 1 is a partially cutaway perspective view of a mold manufactured in one embodiment of the present invention, and FIG. 2 is a partially sectional enlarged view of FIG.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柳澤 稔 兵庫県神戸市兵庫区和田崎町１丁目１番１ 号 三菱重工業株式会社神戸造船所内 (56)参考文献 特開 昭60−18250（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Yanagisawa 1-1 1-1 Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) Reference JP-A-60-18250 (JP, A)
Claims (1)
溶媒を主成分として含むスラリーに、ワツクスパターン
を浸漬し、該スラリーを付着した該ワツクスパターンを
乾燥して該ワツクスパターン上にジルコニア塗膜層を形
成し、その外側に精密鋳造用シエル鋳型とするバツクア
ツプシエル層を形成させ、次いでワツクスパターンを除
去した後、焼成することを特徴とする精密鋳造用鋳型の
製造方法。1. A wax pattern is immersed in a slurry containing fine particles of zirconia, a water-soluble polymer and a solvent as main components, and the wax pattern to which the slurry is attached is dried to form a wax pattern on the wax pattern. A method for producing a precision casting mold, comprising forming a zirconia coating layer, forming a back-up shell layer on the outside of the zirconia coating layer as a precision casting shell mold, removing the wax pattern, and then firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62308720A JPH0811274B2 (en) | 1987-12-08 | 1987-12-08 | Method for manufacturing precision casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62308720A JPH0811274B2 (en) | 1987-12-08 | 1987-12-08 | Method for manufacturing precision casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150428A JPH01150428A (en) | 1989-06-13 |
| JPH0811274B2 true JPH0811274B2 (en) | 1996-02-07 |
Family
ID=17984470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62308720A Expired - Lifetime JPH0811274B2 (en) | 1987-12-08 | 1987-12-08 | Method for manufacturing precision casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0811274B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262670A (en) * | 2017-06-10 | 2017-10-20 | 东风精密铸造有限公司 | A kind of ultra-thin fast drying shell side method of precision-investment casting |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102366820B (en) * | 2011-10-21 | 2013-02-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of complex large thin-walled Ni3Al alloy cast |
| JP6037756B2 (en) * | 2012-10-12 | 2016-12-07 | 三菱重工業株式会社 | Mold manufacturing method and mold |
| CN103008549A (en) * | 2013-01-21 | 2013-04-03 | 贵州红林机械有限公司 | Method for manufacturing investment pattern shell with narrow and curved cavity of casting |
| CN103817290B (en) * | 2014-03-17 | 2016-01-20 | 中国科学院金属研究所 | A kind of hot investment casting preparation method of large size thin-walled titanium alloy bucket body structure |
| CN108788015A (en) * | 2016-05-13 | 2018-11-13 | 上海万泽精密铸造有限公司 | The shell of the ring set ring casting of K4169 high temperature alloys |
| CN107008856B (en) * | 2017-03-06 | 2019-01-29 | 株洲中航动力精密铸造有限公司 | The preparation method of precision castings formwork |
| CN110340279A (en) * | 2019-05-31 | 2019-10-18 | 广东阿诺诗厨卫有限公司 | Heavy castings casting method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6018250A (en) * | 1983-07-12 | 1985-01-30 | Agency Of Ind Science & Technol | Investment casting mold for casting super alloy having inert coating layer by unidirectional solidification |
-
1987
- 1987-12-08 JP JP62308720A patent/JPH0811274B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262670A (en) * | 2017-06-10 | 2017-10-20 | 东风精密铸造有限公司 | A kind of ultra-thin fast drying shell side method of precision-investment casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150428A (en) | 1989-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5535811A (en) | Ceramic shell compositions for casting of reactive metals | |
| US4196769A (en) | Ceramic shell mold | |
| US4664172A (en) | Method for production of investment shell mold for grain-oriented casting of super alloy | |
| US3743003A (en) | Making investment shell molds inhibited against reaction with molten reactive and refractory casting metals | |
| US4557316A (en) | Method for manufacture of investment shell mold suitable for casting grain-oriented super alloy | |
| JPH0811274B2 (en) | Method for manufacturing precision casting mold | |
| US3994346A (en) | Investment shell mold, for use in casting of reacting and refractory metals | |
| JPH03282187A (en) | Crucible and manufacture thereof | |
| US3722574A (en) | Process of making magnesium oxide cores | |
| JP3238166B2 (en) | Manufacturing method of precision casting mold | |
| EP0016127B1 (en) | Ceramic shell mold | |
| US4102691A (en) | Gellable binders | |
| JPH05200484A (en) | Production of casting mold for precision casting | |
| CA1339184C (en) | Ceramic shell molds and cores for casting of reactive metals | |
| JP3122738B2 (en) | Laminated mold material and mold for precision casting and method for producing the same | |
| JPH05208241A (en) | Casting mold for precision casting of titanium or titanium alloy | |
| JP3090873B2 (en) | Mold and its manufacturing method | |
| JP3130962B2 (en) | High melting point active metal casting mold and method for producing the same | |
| GB2294040A (en) | Ceramic shell mold and cores for casting of reactive metals | |
| JP2772090B2 (en) | Ceramic shell mold and core for reactive metal casting | |
| US3815658A (en) | Process for making a metallurgically slow reacting mold | |
| JPH05123820A (en) | Mold for precision casting of titanium or tianium alloy | |
| JPS62259637A (en) | Molding method for casting mold | |
| JPH05212489A (en) | Slurry for casting high fusing point active metal and production of casting by casting mold formed by using this slurry | |
| US20070181285A1 (en) | Die for producing a casting and method for making the die |