JPS5923897B2 - Coating structure to prevent seizure on the inner surface of the socket of centrifugal force casting pipes - Google Patents
Coating structure to prevent seizure on the inner surface of the socket of centrifugal force casting pipesInfo
- Publication number
- JPS5923897B2 JPS5923897B2 JP54038082A JP3808279A JPS5923897B2 JP S5923897 B2 JPS5923897 B2 JP S5923897B2 JP 54038082 A JP54038082 A JP 54038082A JP 3808279 A JP3808279 A JP 3808279A JP S5923897 B2 JPS5923897 B2 JP S5923897B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- socket
- coating
- centrifugal force
- coating structure
- 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
Links
Description
【発明の詳細な説明】
本発明は遠心力鋳造管の受口部の無加工化を究極の目的
とし、この目的達成のためその内面において焼き付きを
防止することのできる新しい塗型塗布構造を提供するも
のである。DETAILED DESCRIPTION OF THE INVENTION The ultimate objective of the present invention is to eliminate machining of the socket part of a centrifugally cast tube, and to achieve this objective, it provides a new coating structure that can prevent seizure on the inner surface of the tube. It is something to do.
各種鋳物の鋳造においては多くの場合その鋳型表面に塗
型を施しておくのが通例であるが、特に遠心力鋳造等の
溶湯鋳込みに際し鋳型表面に衝撃的な溶湯流人を行うも
のでは、溶湯流人時の衝撃により、その受口部分におけ
る砂型中子の表面塗型が部分的に剥離し、鋳肌に砂の焼
き付きを生じるという問題がある。When casting various types of castings, it is customary to apply a coating to the surface of the mold in many cases, but especially in centrifugal force casting and other methods in which molten metal is poured into the mold with an impact, the molten metal is poured onto the surface of the mold. There is a problem in that the surface coating of the sand mold core at the socket part is partially peeled off due to the impact during drifting, causing sand to stick to the casting surface.
そして、このことは遠心力鋳造管の受口部の無加工化を
妨げる最大の要因となっている。This is the biggest factor that prevents machining of the socket portion of the centrifugally cast tube.
本発明は斯かる塗型の剥離を防止でき、以って受口内面
における砂の焼き付きを防止するのに有効な新しい砂型
の塗型塗布構造を提供するもので、本発明の特徴とする
処は、遠心力鋳造用鋳型の受口内面にセットする砂型中
子の外面において、その表面にまず耐火性の無機系塗型
を施し、この上に溶湯との接触を介してガスフィルム層
を形成する有機系塗料をコーティングしてなる点にある
。The present invention provides a new sand mold coating structure that can prevent such peeling of the coating mold and is therefore effective in preventing sand from burning on the inner surface of the socket. In this method, a fire-resistant inorganic coating is first applied to the outer surface of the sand mold core that is set inside the socket of the centrifugal casting mold, and then a gas film layer is formed on this through contact with the molten metal. The point is that it is coated with an organic paint.
以下本発明について説明すると、本発明の受口中子に対
する塗型塗布構造は、第１図ａに示すように、対象とす
る砂型１の所要表面に商品名才力モールド等の耐火性の
適宜無機系塗型２を施し、この無機系塗型２の上に、第
１図すに示すような溶湯４との接触を介してガスフィル
ム層３／を形成する有機系塗料３をコーティングしてな
るものである。The present invention will now be described. As shown in FIG. A coating mold 2 is applied, and the inorganic coating mold 2 is coated with an organic paint 3 that forms a gas film layer 3 through contact with the molten metal 4 as shown in Figure 1. It is something.
即ち、本発明に係る有機系塗料３としては、溶湯４と接
触してその燃焼又は気化によりガスを発生し無機系塗型
２の上に薄いガスフィルム層３′を形成するようなもの
であり、本発明ではこの有機系塗料３として、溶剤系の
有機系塗料を使用する。That is, the organic paint 3 according to the present invention is one that comes into contact with the molten metal 4 and generates gas by combustion or vaporization to form a thin gas film layer 3' on the inorganic coating mold 2. In the present invention, a solvent-based organic paint is used as the organic paint 3.
このような本発明の塗型塗布構造によれは、砂型１に対
する溶湯鋳込み時には、砂型表面の無機系塗型２の上に
短時間ではあるが上記の如く薄いガスフィルム層３′が
形成されるものとなり、この塗型２と溶湯４との間に介
在するガスフィルム層３′が緩衝物として作用し塗型２
の剥離乃至脱落を防止すると共に、塗型２と溶湯４との
直接の反応を阻止し鋳造された鋳物４′の表面に砂の焼
き付きを生じるのを有効に防止するものとなる。According to the mold coating structure of the present invention, when pouring the molten metal into the sand mold 1, a thin gas film layer 3' is formed on the inorganic coating mold 2 on the surface of the sand mold, albeit for a short time, as described above. The gas film layer 3' interposed between the coating mold 2 and the molten metal 4 acts as a buffer, and the coating mold 2
This prevents peeling or falling off of the mold, and prevents direct reaction between the coating mold 2 and the molten metal 4, thereby effectively preventing sand from burning onto the surface of the cast metal 4'.
次に本発明の具体的実施例を挙げて説明する。Next, specific examples of the present invention will be described.
第２図は鉄管等の遠心力鋳造に用いる受口中子に本発明
を適用した場合を示し、図において５は遠心力鋳造用鋳
型、６はその受口バンド、７は受口バンドに設けた受口
中子を示している。Figure 2 shows the case where the present invention is applied to a socket core used for centrifugal casting of iron pipes, etc. In the figure, 5 is a mold for centrifugal casting, 6 is a socket band thereof, and 7 is a socket core provided in the socket band. The socket core is shown.
この中子７は造芯後、その表面Ａに約アルコール３重量
部、才力モールド（ジルコン系耐火物粉）１重量部の割
合から成る無機系塗型（比重５０〜６０ Ｂｅ’）を塗
布し、乾燥後この上に所要の特性を具有する有機系塗料
をスプレーコーティングして、鋳型５内にセットされた
ものである。After forming the core 7, an inorganic coating mold (specific gravity 50 to 60 Be') consisting of approximately 3 parts by weight of alcohol and 1 part by weight of Saili Mold (zircon-based refractory powder) is applied to the surface A. After drying, an organic paint having the required properties is spray-coated onto the mold, and the mold is set in the mold 5.
中子７の表面Ａにこのような塗型を施したものでは、常
法の如く鋳型５の回転下に溶湯４を流入させると、上記
有機系塗料が溶湯４との接触により燃焼してガスフィル
ム層を形成し、鋳造された管体４′の中子表面Ａにおけ
る焼き付きを防止するものとなる。In the case where the surface A of the core 7 is coated in this way, when the molten metal 4 is poured into the rotating mold 5 as in the usual method, the organic paint comes into contact with the molten metal 4 and burns, producing gas. A film layer is formed to prevent seizure on the core surface A of the cast tube 4'.
今これを中子表面Ａに耐火塗型のみを施していた従来の
場合とその実例について比較してみると、参考写真ａに
示す如〈従来例では鉄管４′の受口内面への砂の焼き付
きが部分的に見られるものであるに対し、参考写真すに
示す上記実施例の場合では砂の焼き付きは皆無であり、
これによっても本発明の焼き付き防止効果が確認される
。Now, if we compare this with the conventional case in which only a fireproof coating was applied to the core surface A, we will find that, as shown in reference photo a, in the conventional example, sand was deposited on the inner surface of the socket of the iron pipe 4'. In contrast, in the case of the above example shown in the reference photo, there was no sand burn-in.
This also confirms the burn-in prevention effect of the present invention.
以上のように、本発明の塗型塗布構造によれは、砂型表
面に施す塗型に確実なる焼き付き防止効果を具有させる
ものであり、これにより遠心力鋳造管の受口内面の表面
性状、寸法精度に与える改善効果は大きく、全体として
この種管体受口部の無加工化を達成することができる。As described above, the coating structure of the present invention ensures that the coating applied to the surface of the sand mold has a reliable anti-seizure effect, and thereby improves the surface properties and dimensions of the inner surface of the socket of the centrifugal force cast pipe. The improvement effect on accuracy is significant, and it is possible to achieve this type of tube socket without any machining as a whole.
又、本発明で塗型が剥離し難いものであるが故、塗型全
体としての塗膜厚さを薄くできる利点が得られ、これに
よって益々寸法精度の向上に富力するものとなる。Furthermore, since the coating mold of the present invention is difficult to peel off, there is an advantage that the coating thickness of the entire coating mold can be reduced, thereby further improving dimensional accuracy.
尚、本発明の塗型塗布構造では砂型表面への吸湿防止効
果も犬であり、それ放水発明をフラン鋳型、イソキュア
ー鋳型等吸湿劣化の強いものに適用した場合では、その
保存性の改善にもつながる訳である。Furthermore, the mold application structure of the present invention also has the effect of preventing moisture absorption on the surface of the sand mold, and when the water spraying invention is applied to molds that are susceptible to moisture absorption and deterioration, such as furan molds and isocure molds, it is also effective in improving their storage stability. It's a connection.
第１図ａ、ｂ、ｃは本発明の塗型塗布構造を概略的に示
す断面図であり、第２図ａ、ｂは本発明を遠心力鋳造鋳
型の受口中子に適用した場合の具体例を示す断面図であ
る。
１・・・・・・砂型、２・・・・・・無機系塗型、３・
・・・・・有機系塗料、３′・・・・・・ガスフィルム
層、４・・・・・・溶湯、４′・・・・・・鋳物（管体
）。Figures 1a, b, and c are cross-sectional views schematically showing the mold coating structure of the present invention, and Figures 2a and b are concrete views of the present invention when applied to a socket core of a centrifugal casting mold. It is a sectional view showing an example. 1...Sand mold, 2...Inorganic coating mold, 3.
...Organic paint, 3'... Gas film layer, 4... Molten metal, 4'... Casting (pipe body).
Claims (1)
の外面において、その表面にまず耐火性の無機系塗型を
施し、この上に溶湯との接触を介してガスフィルム層を
形成する有機系塗料をコーティングしてなることを特徴
とする遠心力鋳造管の受口内面において焼き付きを防止
するための塗型塗布構造。1. On the outer surface of the sand mold core that is set on the inner surface of the socket of the centrifugal casting mold, a fire-resistant inorganic coating is first applied to the surface, and a gas film layer is formed on this through contact with the molten metal. A coating structure for preventing seizure on the inner surface of a socket of a centrifugal force casting tube, characterized by being coated with an organic paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54038082A JPS5923897B2 (en) | 1979-03-29 | 1979-03-29 | Coating structure to prevent seizure on the inner surface of the socket of centrifugal force casting pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54038082A JPS5923897B2 (en) | 1979-03-29 | 1979-03-29 | Coating structure to prevent seizure on the inner surface of the socket of centrifugal force casting pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55130360A JPS55130360A (en) | 1980-10-09 |
| JPS5923897B2 true JPS5923897B2 (en) | 1984-06-05 |
Family
ID=12515550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54038082A Expired JPS5923897B2 (en) | 1979-03-29 | 1979-03-29 | Coating structure to prevent seizure on the inner surface of the socket of centrifugal force casting pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923897B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2501007Y2 (en) * | 1990-11-20 | 1996-06-12 | 株式会社クボタ | Mold for centrifugal casting of double layer pipe |
| CN107398527A (en) * | 2017-06-14 | 2017-11-28 | 安徽华昊机械制造有限公司 | A kind of pump housing molding sand casting technique with fireproof coating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517128A (en) * | 1975-04-08 | 1976-01-21 | Kumiai Chemical Industry Co | Anteiseiryokonaru noengeiyosakinsoseibutsu |
-
1979
- 1979-03-29 JP JP54038082A patent/JPS5923897B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517128A (en) * | 1975-04-08 | 1976-01-21 | Kumiai Chemical Industry Co | Anteiseiryokonaru noengeiyosakinsoseibutsu |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55130360A (en) | 1980-10-09 |
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