JP2896468B2 - Molding material for foamed resin model and foamed resin model used for vanishing model casting method - Google Patents
Molding material for foamed resin model and foamed resin model used for vanishing model casting methodInfo
- Publication number
- JP2896468B2 JP2896468B2 JP779290A JP779290A JP2896468B2 JP 2896468 B2 JP2896468 B2 JP 2896468B2 JP 779290 A JP779290 A JP 779290A JP 779290 A JP779290 A JP 779290A JP 2896468 B2 JP2896468 B2 JP 2896468B2
- Authority
- JP
- Japan
- Prior art keywords
- foamed resin
- weight
- parts
- model
- resin model
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、消失模型鋳造法に使用する塗型材および発
泡樹脂模型に関するものであり、詳しくは発泡樹脂模型
に塗布する塗型材および該模型に関するものである。Description: TECHNICAL FIELD The present invention relates to a coating material and a foamed resin model used in a vanishing model casting method, and more particularly to a coating material applied to a foamed resin model and the model. Things.
（従来の技術） 消失模型鋳造法に使用する発泡樹脂模型には、スラリ
ー状塗型材の塗布、又は塗布された塗型材層への耐火物
粒子（例えば、ジルコンサンド）のふりかけによってコ
ーティング層が形成され、砂かみ、目ざし等を防止して
いる（例えば、特開昭59−39447号公報）。(Prior Art) A coating layer is formed on a foamed resin model used in the vanishing model casting method by applying a slurry-like coating material or sprinkling refractory particles (for example, zircon sand) on the applied coating material layer. In addition, sand grime, eyesight, and the like are prevented (for example, JP-A-59-39447).
（発明が解決しようとする課題） 従来のスラリー状塗型材層は強度が小さく、しかも塗
布された塗型材層への耐火物粒子のふりかけによっても
塗型強度の大巾な向上は望めず、造型に際して発泡樹脂
模型の変形、コーティング層の破損等が起きやすく、鋳
造品の寸法精度の悪化や表面欠陥などの鋳造欠陥が多発
するという問題点がある。そこで、本発明はかかる問題
点を解消するためになされたもので、鋳造欠陥が発生し
にくい塗型材を提供するものである。(Problems to be Solved by the Invention) The conventional slurry-like coating material layer has low strength, and a large improvement in coating strength cannot be expected even by sprinkling refractory particles on the applied coating material layer. In this case, there is a problem that deformation of the foamed resin model, damage of the coating layer, and the like are apt to occur, and casting defects such as deterioration of dimensional accuracy of the casting and surface defects occur frequently. Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a coating material in which casting defects hardly occur.
（課題を解決するための手段） 本発明は、耐火性微粉末、バインダーおよびガラス繊
維を主成分とする混合溶液からなり、耐火性微粉末100
重量部に対してバインダー５〜30重量部、ガラス繊維３
〜10重量部を添加した塗型材および該消失模型鋳造法に
用いる発泡樹脂模型の塗型材を塗布した発泡樹脂模型で
ある。(Means for Solving the Problems) The present invention comprises a mixed solution containing a refractory fine powder, a binder and glass fiber as main components,
5 to 30 parts by weight of binder and 3 parts by weight of glass fiber
It is a foamed resin model to which a mold wash added to about 10 parts by weight and a mold wash of a foamed resin model used in the vanishing model casting method are applied.
次に塗型材の配合組成について説明する。 Next, the composition of the coating material will be described.
（１）耐火性微粉末 耐火性微粉末は塗型の骨材成分であり、アルミナ（Al
2O3）、ジルコニア、（ZrO2）、シリカ（SiO2）、ベン
ガラ（Fe2O3）、酸化亜鉛（ZnO）、マグネシア（Mg
O）、石粉、硅燥土の１種又は２種以上が用いられ、粒
度は100〜500メッシュである。(1) Refractory fine powder Refractory fine powder is a coating type aggregate component and is made of alumina (Al).
2 O 3 ), zirconia, (ZrO 2 ), silica (SiO 2 ), red iron (Fe 2 O 3 ), zinc oxide (ZnO), magnesia (Mg
One or more of O), stone powder, and silica soil are used, and the particle size is 100 to 500 mesh.
（２）バインダー バインダーとしては、水、エタノール、メタノール、
ポリビニルアルコール（PVA）、液状ワックス、リグニ
ンソーダ、ロジン、酢酸ビニル・コポリマー・エマルジ
ョン、酢酸ビニル−アクリル酸エステル、酢酸ビニル−
マレイン酸ジブチルエステル、酢酸ビニル−ベオバエマ
ルジョン、酢酸ビニル−エチレンエマルジョンの１種又
は２種以上が用いられ、耐火性微粉末100重量部に対し
て５〜30重量部添加され、５重量部未満では耐火性微粉
末が均一に混練されず、30重量部を超えると塗型の粘性
が低くなり、発泡樹脂模型への付着性が悪くなる。(2) Binder As the binder, water, ethanol, methanol,
Polyvinyl alcohol (PVA), liquid wax, lignin soda, rosin, vinyl acetate copolymer emulsion, vinyl acetate-acrylate, vinyl acetate-
One or more of maleic acid dibutyl ester, vinyl acetate-veova emulsion and vinyl acetate-ethylene emulsion are used, and 5 to 30 parts by weight are added to 100 parts by weight of the refractory fine powder, and less than 5 parts by weight In this case, the refractory fine powder is not uniformly kneaded, and if it exceeds 30 parts by weight, the viscosity of the coating mold becomes low, and the adhesion to the foamed resin model becomes poor.
（３）ガラス繊維 ガラス繊維は、太さ２〜50μｍ、長さ１〜5mmのもの
を使用し、太さが２μｍ未満では塗型の強化効果が低下
し、50μｍを超えると繊維同志がからまりやすく分散し
ない。又、長さが1mm未満では重畳現象が発生しにくく
なり、塗型の強度が低下し、5mmを超えると繊維の解繊
が不十分になり、ブリッジ現象が生じる。(3) Glass fiber The glass fiber used has a thickness of 2 to 50 μm and a length of 1 to 5 mm. If the thickness is less than 2 μm, the effect of strengthening the mold decreases, and if it exceeds 50 μm, the fibers become entangled. Not easily dispersed. On the other hand, if the length is less than 1 mm, the superimposition phenomenon is less likely to occur, and the strength of the coating mold is reduced.
ガラス繊維は、耐火性微粉末100重量部に対して３〜1
0重量部添加され、３重量部未満では塗型の強化効果が
低下し、10重量部を超えると分散性が低下する。ガラス
繊維を添加配合する方法は特に制限されず、種々の公知
の方法に準じて行われる。Glass fiber is 3-1 to 100 parts by weight of refractory fine powder.
When 0 part by weight is added, if less than 3 parts by weight, the effect of strengthening the coating decreases, and if it exceeds 10 parts by weight, dispersibility decreases. The method of adding and blending the glass fiber is not particularly limited, and is performed according to various known methods.
前記配合組成のほかに増粘剤（粘度調整用材料）消泡
剤、界面活性剤（各模型のぬれ性改善用材料）が適宜添
加される。In addition to the above composition, a thickener (viscosity adjusting material) defoaming agent and a surfactant (material for improving the wettability of each model) are appropriately added.
（作用） 増粘剤、消泡剤、界面活性剤の１種又は２種以上を含
有した前記配合組成に水又はアルコールを混合してスラ
リー状塗型材を調整する。(Action) Water or alcohol is mixed with the above-mentioned composition containing one or more of a thickener, an antifoaming agent, and a surfactant to prepare a slurry-like coating material.
該塗型材中に発泡樹脂模型を浸漬するか、あるいは発泡
樹脂模型に該塗型材をハケ塗りしてコーティング層を形
成する。The foamed resin model is immersed in the coating material, or the foaming resin model is brush-coated with the coating material to form a coating layer.
（実施例） 以下、本発明の実施例について説明する。(Example) Hereinafter, an example of the present invention will be described.
実施例 粒度280メッシュのシリカSiO2）100重量部にロジン４
重量部、メタノール15重量部および増粘剤２重量部を添
加し混練した後、ガラス繊維５重量部（太さ30μｍ、長
さ2mm、集束数100本）を添加し、ミキサーによってガラ
ス繊維を解繊かつ分散させると共に、前記各配合材料を
均一に混合する。その後、水120重量部を添加し、混合
撹拌して粘度4000poisの塗型材を得た。Example Silica SiO 2 having a particle size of 280 mesh) 100 parts by weight of rosin 4
Parts by weight, 15 parts by weight of methanol and 2 parts by weight of a thickener were added and kneaded, and then 5 parts by weight of glass fiber (thickness: 30 μm, length: 2 mm, number of bundles: 100) were added, and the glass fiber was disintegrated by a mixer. While finely and dispersedly, each of the compounding materials is uniformly mixed. Thereafter, 120 parts by weight of water was added and mixed and stirred to obtain a coating material having a viscosity of 4000 pois.
次いで、発泡樹脂模型の曲げ試験用テストピース（発
泡ポリスチレン成形体、密度0.02g/cc形状はJIS A9511
に準拠）に該塗型材を塗布してコーティング層（厚さ0.
2〜1.0mm）を形成する。その後、塗型されたテストピー
スの曲げ強度試験（JIS A9511に準拠）を行なった。Next, a test piece for the bending test of the foamed resin model (foamed polystyrene molded article, density 0.02g / cc shape is JIS A9511
The coating material is applied to the coating layer (thickness:
2 to 1.0 mm). Thereafter, a bending strength test (based on JIS A9511) of the coated test piece was performed.
その結果を表に示す。本実施例のテストピースは比較
例１〜２のテストピースと比べて曲げ強度が高く、機械
的性質に優れていることがわかる。又、消失模型鋳造法
に本実施例の塗型材を塗布した発泡樹脂模型を用いる
と、鋳造品の歪が大巾に低減した。The results are shown in the table. It can be seen that the test piece of the present example has higher bending strength and better mechanical properties than the test pieces of Comparative Examples 1 and 2. Also, when the foamed resin model coated with the coating material of the present example was used for the vanishing model casting method, the distortion of the cast product was greatly reduced.
比較例１ 粒度280メッシュのシリカ（SiO2）100重量部にロジン
４重量部、メタノール15重量部および増粘剤２重量部を
添加し混練した後、水120重量部を添加し、混合攪拌し
て粘度3850poisの塗型材を得た。 Comparative Example 1 4 parts by weight of rosin, 15 parts by weight of methanol and 2 parts by weight of a thickener were added to 100 parts by weight of silica (SiO 2 ) having a particle size of 280 mesh, kneaded, and 120 parts by weight of water were added, followed by mixing and stirring. Thus, a coating material having a viscosity of 3850 pois was obtained.
次いで、発泡樹脂模型の曲げ試験用テストピース（発
泡ポリスチレン成形体、密度0.02g/cc、形状はJIS A951
1に準拠）に該塗型材を塗布してコーティング層（厚さ
0.2〜1.0mm）を形成する。その後、コーティング層を有
するテストピースの曲げ強度試験（JIS A9511に準拠）
を行ない、その結果を表に併記する。Next, a test piece for bending test of a foamed resin model (foamed polystyrene molded article, density: 0.02 g / cc, shape: JIS A951
1) and apply the coating material to the coating layer (thickness
0.2-1.0 mm). After that, bending strength test of test piece with coating layer (based on JIS A9511)
And the results are shown in the table.
比較例２ 粒度280メッシュのシリカ（SiO2）100重量部にロジン
４重量部、メタノール15重量部および増粘剤２重量部を
添加し混練した後、水120重量部を添加し、混合攪拌し
て粘度3850poisの塗型材を得た。Comparative Example 2 4 parts by weight of rosin, 15 parts by weight of methanol and 2 parts by weight of a thickener were added to 100 parts by weight of silica (SiO 2 ) having a particle size of 280 mesh, kneaded, and 120 parts by weight of water were added, followed by mixing and stirring. Thus, a coating material having a viscosity of 3850 pois was obtained.
次いで、発泡樹脂模型の曲げ試験用テストピース（発
泡ポリスチレン成形体、密度0.02g/cc、形状はJIS A951
1に準拠）に該塗型材を塗布した直後に、８号硅砂（280
メッシュ）をふりかけ、コーティング層（硅砂層厚さ１
〜3mm）を形成する。その後、コーティング層を有する
テストピースの曲げ強度試験（JIS A9511に準拠）を行
ない、その結果を表に併記する。Next, a test piece for bending test of a foamed resin model (foamed polystyrene molded article, density: 0.02 g / cc, shape: JIS A951
Immediately after applying the mold wash to the No. 8 silica sand (280
Sprinkle with a mesh) and apply the coating layer (silica sand layer thickness 1)
~ 3mm). Thereafter, a bending strength test (based on JIS A9511) of the test piece having the coating layer is performed, and the results are also shown in the table.
（発明の効果） 本発明によれば、耐火性微粉末、バインダーおよびガ
ラス繊維を主成分とするスラリー状塗型材であるので、
発泡樹脂模型のバックアップ強度が大巾に向上し、寸法
精度の優れた鋳造品を容易かつ簡単に鋳造できる。(Effect of the Invention) According to the present invention, since it is a slurry type coating material containing refractory fine powder, binder and glass fiber as main components,
The backup strength of the foamed resin model is greatly improved, and castings with excellent dimensional accuracy can be easily and easily cast.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22C 3/00 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B22C 3/00
Claims (3)
維を主成分とする混合溶液からなり、耐火性微粉末100
重量部に対してバインダー５〜30重量部、ガラス繊維３
〜10重量部を添加した消失模型鋳造法に用いる発泡樹脂
模型の塗型材。1. A refractory fine powder comprising a mixed solution containing a refractory fine powder, a binder and glass fiber as main components.
5 to 30 parts by weight of binder and 3 parts by weight of glass fiber
A mold material for a foamed resin model used in a vanishing model casting method in which up to 10 parts by weight is added.
ガラス繊維は太さ２〜50μｍ、長さ１〜5mmである請求
項１記載の消失模型鋳造法に用いる発泡樹脂模型の塗型
材。2. The refractory fine powder has a particle size of 100 to 500 mesh,
The mold material for a foamed resin model used in the vanishing model casting method according to claim 1, wherein the glass fiber has a thickness of 2 to 50 µm and a length of 1 to 5 mm.
樹脂模型。3. A foamed resin model coated with the coating material according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP779290A JP2896468B2 (en) | 1990-01-17 | 1990-01-17 | Molding material for foamed resin model and foamed resin model used for vanishing model casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP779290A JP2896468B2 (en) | 1990-01-17 | 1990-01-17 | Molding material for foamed resin model and foamed resin model used for vanishing model casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03210934A JPH03210934A (en) | 1991-09-13 |
| JP2896468B2 true JP2896468B2 (en) | 1999-05-31 |
Family
ID=11675505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP779290A Expired - Fee Related JP2896468B2 (en) | 1990-01-17 | 1990-01-17 | Molding material for foamed resin model and foamed resin model used for vanishing model casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2896468B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570661A (en) * | 2017-10-31 | 2018-01-12 | 湖南国盛石墨科技有限公司 | One kind casting graphite sand mould coating and preparation method thereof |
-
1990
- 1990-01-17 JP JP779290A patent/JP2896468B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570661A (en) * | 2017-10-31 | 2018-01-12 | 湖南国盛石墨科技有限公司 | One kind casting graphite sand mould coating and preparation method thereof |
| CN107570661B (en) * | 2017-10-31 | 2019-07-02 | 湖南国盛石墨科技有限公司 | A kind of casting graphite sand mould coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03210934A (en) | 1991-09-13 |
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| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |