JPH03226331A - Manufacture of precision casting product - Google Patents
Manufacture of precision casting productInfo
- Publication number
- JPH03226331A JPH03226331A JP2178090A JP2178090A JPH03226331A JP H03226331 A JPH03226331 A JP H03226331A JP 2178090 A JP2178090 A JP 2178090A JP 2178090 A JP2178090 A JP 2178090A JP H03226331 A JPH03226331 A JP H03226331A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- casting
- calcium carbonate
- molten metal
- organic compound
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000005495 investment casting Methods 0.000 title abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 32
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 14
- 238000005266 casting Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- -1 chamotte Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical class OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はインベストメント鋳造を基本とするセラミック
シェルモールド法およびソリッドモールド法等による精
密鋳造品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing precision cast products by a ceramic shell mold method, a solid mold method, etc. based on investment casting.
従来、精密鋳造における鋳型材料としては、シャモット
、溶融シリカ、アルミナ、ジルコン等の熱的、化学的に
比較的安定な耐火材料を使用されているが、これらの耐
火材料を使用した鋳型の強度は高（、鋳造後においても
粘結剤の強い結合によって鋳造品から耐火物を除去する
のは容易なことではなく、機械的、化学的方法によって
後処理をしている。精密鋳造において上記の欠点を改良
するものとして鋳型材料に炭酸カルシウムを配合する提
案がなされている。例えば、特公昭４９−２６５５号公
報は、鋳型材料として炭酸カルシウムを鋳型組成物中に
１０重量％以上含有せしめ、かつ鋳型の焼成温度を８５
０℃以上とし、鋳型の一部を酸化カルシウムとすること
により崩壊性の優れた精密鋳造用鋳型の製造方法である
。Conventionally, thermally and chemically relatively stable refractory materials such as chamotte, fused silica, alumina, and zircon have been used as mold materials in precision casting, but the strength of molds made of these refractory materials is (Even after casting, it is not easy to remove the refractory from the cast product due to the strong bonding of the binder, and post-treatment is carried out using mechanical and chemical methods.The above disadvantages in precision casting In order to improve this, it has been proposed to incorporate calcium carbonate into the mold material. For example, Japanese Patent Publication No. 49-2655 proposes that the mold composition contains 10% by weight or more of calcium carbonate as the mold material, and The firing temperature of 85
This is a method for manufacturing a precision casting mold with excellent collapsibility by keeping the temperature at 0° C. or higher and using calcium oxide as a part of the mold.
また更に、特公昭６４−４０１３５号公報は貝化石と称
して炭酸カルシウムに珪酸などの不純物が混入している
場合、天然に豊富に産出するため安価で、そのうえ焼成
温度が７６０℃と低くなる利点がある。Furthermore, Japanese Patent Publication No. 64-40135 describes calcium carbonate, which is called shellfish fossil and contains impurities such as silicic acid, as it is naturally abundant and therefore inexpensive, and has the advantage that the firing temperature is as low as 760°C. There is.
前記２件の提案は焼成温度に差があるものの基本的には
鋳込み前の鋳型の一部を酸化カルシウムにすることで、
鋳込み後の鋳型を自己崩壊させるというものである。と
ころが上記鋳型を用いて熔融金属を注湯すると、溶湯の
熱のために鋳型は急冷されず十分な崩壊性は得られない
。また、溶融金属を注湯後、鋳型ごと水に浸漬した場合
、鋳造品の形状が複雑になると、やはり、十分な崩壊性
が得られず、その結果耐火物が乾燥したのち機械的、化
学的処理を施して残存する鋳型を除去しなくてはならな
い欠点があった。これは酸化カルシウムから水和した水
酸化カルシウムが乾燥の過程で二酸化炭素を吸収して炭
酸カルシウムとなって硬化し、その結果耐火物の除去は
極めて困難になるものと考えられる。Although the above two proposals differ in the firing temperature, the basic idea is to use calcium oxide as part of the mold before casting.
The method is to allow the mold to self-destruct after casting. However, when molten metal is poured into the mold, the mold is not rapidly cooled due to the heat of the molten metal, and sufficient collapsibility cannot be obtained. In addition, if the mold is immersed in water after pouring molten metal, if the shape of the cast product becomes complex, sufficient collapsibility may not be obtained, and as a result, after the refractory dries, mechanical and chemical There was a drawback that the remaining mold had to be removed by treatment. This is thought to be because calcium hydroxide hydrated from calcium oxide absorbs carbon dioxide during the drying process and hardens into calcium carbonate, making it extremely difficult to remove the refractory.
本発明の目的は特定組成の鋳型を用いて、これに鋳込ん
だ後、簡単な後処理を施すことで鋳型が容易に崩壊でき
る精密鋳造品の製造方法を提供することである。An object of the present invention is to provide a method for manufacturing a precision cast product in which the mold can be easily collapsed by using a mold having a specific composition and performing a simple post-treatment after casting into the mold.
ｃ問題点を解決するための手段〕
本発明は、ろう、その他の除去し得る模型の周囲に炭酸
カルシウムを含んだ型を作り、模型を除去した鋳型を８
５０℃以上にて焼成し、その一部を酸化カルシウムとす
る鋳型を用いる精密鋳造品の製造方法において、前記鋳
型に金属溶湯を鋳込み放冷した後、有機化合物を含浸さ
せることを特徴とする精密鋳造品の製造方法である。Means for Solving Problems] The present invention involves making a mold containing calcium carbonate around wax or other removable models, and molding the mold from which the model has been removed by
A method for manufacturing a precision casting product using a mold fired at 50° C. or higher and partially containing calcium oxide, characterized in that molten metal is poured into the mold, allowed to cool, and then impregnated with an organic compound. This is a method for manufacturing cast products.
本発明による炭酸カルシウムを使用、コロイダルシリカ
またはエチルシリケート加水分解液を粘結剤として、炭
酸カルシウム粉末または、これに一部耐火物粉末を添加
、配合することによってスラリーを作成し、原型となる
ろうなどの溶融可能な模型をこのスラリーに浸漬して、
シャモット、溶融シリカ、ジルコンなどの耐火材料粒子
を被覆後、乾燥するが、前記耐火物粒子の一部を炭酸カ
ルシウム粒子で置換することができる。このようにして
必要とする鋳型の厚みが得られるまで、この模型のスラ
リーディッピング、サンディングを繰り返す。その後、
脱膜型、焼成、注湯作業が終了し、鋳型を適度に冷却す
る。その後耐火材料の崩壊性を得るため有機化合物を含
浸させる。前記の有機化合物は、精製鎖状炭化水素、植
物油、芳香族カルボン酸エステル、エーテル等いずれを
使用してもさしつかえない。なお有機化合物として灯油
を 用い、これに鋳型ごと浸漬した後引き上げ大気中に
放１するか、オートクレーブ等で水蒸気を与えることで
、造型した鋳型は砂状となり、崩壊する。この良好な崩
壊性は、先に示した２件の公知例では得がたく、特に複
雑形状の精密鋳造品の製造に 通し、鋳型が残存するこ
とがないため、その後の後処理を不用とするものである
。Using calcium carbonate according to the present invention, using colloidal silica or ethyl silicate hydrolyzate as a binder, a slurry is created by adding and blending calcium carbonate powder or a part of it with refractory powder, and the wax becomes a prototype. A meltable model such as is immersed in this slurry,
After coating with refractory material particles such as chamotte, fused silica, zircon, etc., the refractory particles are dried, and a portion of the refractory particles may be replaced with calcium carbonate particles. In this way, slurry dipping and sanding of this model are repeated until the required thickness of the mold is obtained. after that,
After the film-removing mold, firing, and pouring operations are completed, the mold is cooled appropriately. Afterwards, it is impregnated with an organic compound to obtain the collapsibility of the refractory material. As the organic compound, any of refined chain hydrocarbons, vegetable oils, aromatic carboxylic acid esters, ethers, etc. may be used. Kerosene is used as an organic compound, and the mold is immersed in it and then lifted and released into the atmosphere, or by applying steam in an autoclave or the like, the mold becomes sand-like and collapses. This good disintegration property is difficult to obtain with the two known examples mentioned above, and it is particularly useful for manufacturing precision castings with complex shapes, since the mold does not remain and subsequent post-processing is not required. It is something.
以下、本発明の実施例について説明する。なお本発明は
、以下の実施例によって限定されるものではない。Examples of the present invention will be described below. Note that the present invention is not limited to the following examples.
実施例 １
本発明の一例であるセラミックシェルモールドの造型は
次の手順で製作される。Example 1 A ceramic shell mold, which is an example of the present invention, is manufactured by the following procedure.
（１）粒度３２５メツシユ以下の炭酸カルシウム粉末ま
たは、その他の耐火物粉末と炭酸カルシウム粉末の混合
したものをフィラー材とし、コロイダルシリカ（シリカ
重量１０〜３０％）に前記フィラー材を添加、混合し、
−次および二次スラリーを作製する。(1) Calcium carbonate powder with a particle size of 325 mesh or less or a mixture of other refractory powder and calcium carbonate powder is used as a filler material, and the filler material is added to colloidal silica (silica weight 10 to 30%) and mixed. ,
- Making a secondary and secondary slurry.
（２）−次スラリー粘度を、ＺａｒｎＣｕｐ Ｎｏ、
５で１２１８ｓｅｃとし、二次スラリーは、ＺａｒｎＣ
ｕｐ Ｎｏ、 ５で５−８ｓｅｃとなるように調製する
。(2) - Next slurry viscosity, ZarnCup No.
5 for 1218 sec, and the secondary slurry was ZarnC
Adjust to 5-8 seconds with up No. 5.
（３）ワックス等の溶融可能な模型をスラリーに浸漬し
、模型の表面に均一に被覆する。(3) A model made of meltable wax or the like is immersed in the slurry to uniformly coat the surface of the model.
（４）粒度１０〜４８メツシユの耐火物粒子または、こ
れに炭酸カルシウム粒子で一部置換したものをスタッコ
材として、スラリー被覆後の模型に均一に付着させ、乾
燥させる。(4) Refractory particles with a particle size of 10 to 48 mesh, or particles partially substituted with calcium carbonate particles, are used as a stucco material and uniformly adhered to the slurry-coated model and dried.
（５）（３）及び（４）を繰り返し行い、鋳造に耐えう
る厚さの鋳型を形成し、セラミックシェルモールドとす
る。(5) Repeat steps (3) and (4) to form a mold thick enough to withstand casting, and use it as a ceramic shell mold.
以上の造型工程の次は、オートクレーブもしくは急速加
熱熱処理によって鋳型からワックス等の溶融可能な模型
を溶出させる。次いで８５０℃以上で３０分以上の鋳型
焼成を行う。その後、所定の鋳型温度（６００℃）で銅
合金の鋳造を行った注湯した鋳型は大気中で放冷し、そ
の後灯油に浸漬した後引き上げ大気中に放置した。鋳型
は崩壊し、砂状となった。鋳物には鋳型反応は認められ
ず、良好であった。After the above molding process, a meltable model such as wax is eluted from the mold by autoclaving or rapid heating heat treatment. Next, the mold is fired at 850° C. or higher for 30 minutes or more. Thereafter, the copper alloy was cast at a predetermined mold temperature (600° C.) and the poured mold was allowed to cool in the atmosphere, then immersed in kerosene, and then pulled up and left in the atmosphere. The mold collapsed and became sandy. No mold reaction was observed in the casting, which was good.
実施例２
実施例１での造型手順が
（１）粒度３２５メソシユ以下の炭酸カルシウム粉末あ
るいは、その他の耐火物粉末と炭酸カルシウム粉末の混
合したものをフィラー材とし、エチルシリケート（シリ
カ重量１０〜３０％）に前記フィラー材を添加、混合し
、−次および二次スラリーを作製する。Example 2 The molding procedure in Example 1 was as follows: (1) Calcium carbonate powder with a particle size of 325 mS or less or a mixture of other refractory powder and calcium carbonate powder was used as the filler material, and ethyl silicate (silica weight 10 to 30 %) and mix with the filler material to prepare a secondary and secondary slurry.
であり、以下実施例１と同様の作業を行った。注湯した
鋳型は大気中で放冷し、その後植物油に浸漬した後引き
上げ大気中に放置した。鋳型は崩壊し、砂状となった。The same operations as in Example 1 were performed below. The poured mold was left to cool in the atmosphere, then immersed in vegetable oil, taken out, and left in the atmosphere. The mold collapsed and became sandy.
鋳物には鋳型反応は認められず、良好であった。No mold reaction was observed in the casting, which was good.
実施例３
実施例Ｉで、鋳鉄を、鋳型温度１０００℃、注湯温度１
４００℃で鋳造した。注湯した鋳型は大気中で放冷し、
その後灯油に浸漬した後引き上げ大気中に放置した。鋳
型は崩壊し、砂状となった。Example 3 In Example I, cast iron was prepared at a mold temperature of 1000°C and a pouring temperature of 1.
It was cast at 400°C. The poured mold is left to cool in the atmosphere,
After that, it was immersed in kerosene and then taken out and left in the atmosphere. The mold collapsed and became sandy.
鋳物には鋳型反応は認められず、良好であった。No mold reaction was observed in the casting, which was good.
本発明によれば、日本で最も豊富で安価に産出する炭酸
カルシウムを用いることにより、インベストメント鋳造
法による精密鋳造品の製造ができ、しかも、従来得られ
なかった良好な崩壊性が得られ、作業性が著しく向上さ
れる。According to the present invention, by using calcium carbonate, which is the most abundant and inexpensively produced in Japan, it is possible to manufacture precision cast products by investment casting method, and moreover, it is possible to obtain good disintegration properties that could not be obtained conventionally. performance is significantly improved.
Claims (1)
を含んだ型を作り、模型を除去した鋳型を８５０℃以上
にて焼成し、その一部を酸化カルシウムとする鋳型を用
いる精密鋳造品の製造方法において、前記鋳型に金属溶
湯を鋳込み放冷した後、有機化合物を含浸させることを
特徴とする精密鋳造品の製造方法。A mold containing calcium carbonate is made around wax or other removable models, and the mold from which the model has been removed is fired at 850°C or higher, and a part of the mold is made of calcium oxide to manufacture precision cast products. A method for producing a precision cast product, characterized in that the molten metal is poured into the mold, allowed to cool, and then impregnated with an organic compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178090A JPH03226331A (en) | 1990-01-31 | 1990-01-31 | Manufacture of precision casting product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178090A JPH03226331A (en) | 1990-01-31 | 1990-01-31 | Manufacture of precision casting product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03226331A true JPH03226331A (en) | 1991-10-07 |
Family
ID=12064577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2178090A Pending JPH03226331A (en) | 1990-01-31 | 1990-01-31 | Manufacture of precision casting product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03226331A (en) |
-
1990
- 1990-01-31 JP JP2178090A patent/JPH03226331A/en active Pending
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