JPS5831108B2 - Method of applying high temperature resistant electrical insulation coating to metal plate - Google Patents
Method of applying high temperature resistant electrical insulation coating to metal plateInfo
- Publication number
- JPS5831108B2 JPS5831108B2 JP1115081A JP1115081A JPS5831108B2 JP S5831108 B2 JPS5831108 B2 JP S5831108B2 JP 1115081 A JP1115081 A JP 1115081A JP 1115081 A JP1115081 A JP 1115081A JP S5831108 B2 JPS5831108 B2 JP S5831108B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- high temperature
- electrical insulation
- temperature resistant
- alumina
- 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
Landscapes
- Paints Or Removers (AREA)
- Inorganic Insulating Materials (AREA)
Description
【発明の詳細な説明】
本発明は金属板の表面に耐高温電気絶縁被膜を施す方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying a high temperature resistant electrical insulation coating to the surface of a metal plate.
従来、上記の被膜を施す方法としては、珪酸ナトリウム
即ち水硝子をバインダとし、該バインダに酸化アルミニ
ウム即ちアルミナの粉末を混合して糊状としたものを金
属板の表面に塗布して焼成固着させることにより、所要
の電気絶縁被膜を形成していた。Conventionally, the method for applying the above film is to use sodium silicate, or water glass, as a binder, mix aluminum oxide, or alumina powder with the binder, make a paste, apply it to the surface of a metal plate, and bake it to fix it. By doing so, a required electrically insulating film was formed.
しかしながら、上記の被膜は水硝子の物性上、被膜の温
度が３００〜４００℃の高温になると、電気絶縁性が著
るしく低下するという欠点があった。However, due to the physical properties of water glass, the above-mentioned coating has the disadvantage that when the temperature of the coating reaches a high temperature of 300 to 400[deg.] C., the electrical insulation property decreases significantly.
本発明は上記の点に鑑み、金属板の表面に耐高温性の極
めて良好な電気絶縁被膜を施す方法を提案したものであ
る。In view of the above points, the present invention proposes a method of applying an electrically insulating coating having extremely good high temperature resistance to the surface of a metal plate.
以下、本発明を実施態様の図面により詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to drawings of embodiments.
本発明の方法では、先ずアルミナの粉末と水硝子を混合
して糊状としたものを、鉄板のごとき金属板１０表面に
例えば０．５ ｍｍの厚みに塗布して基層２ａを形成す
る。In the method of the present invention, first, a paste made by mixing alumina powder and water glass is applied to the surface of a metal plate 10 such as an iron plate to a thickness of, for example, 0.5 mm to form the base layer 2a.
そして、この基層２ａが未乾燥で粘着力がある状態のと
きに、該基層の上にね度が例えば８０−１００メツシユ
の粒状結晶アルミナを３遍なく平均的に振りかげて、ア
ルミナの被覆層２ｂを形成する。Then, when the base layer 2a is undried and has adhesive strength, granular crystal alumina having a consistency of, for example, 80-100 mesh is sprinkled evenly over the base layer three times to form an alumina coating layer. 2b is formed.
このアルミナ被覆層２ｂの厚みは例えば０５〜１ｍｍと
する。The thickness of this alumina coating layer 2b is, for example, 05 to 1 mm.
以上のようにして基層２ａ及びアルミナ被覆層２ｂを形
成してから常温で約１時間はど予備乾燥した後、約８５
０℃の温度で焼成することにより、金属板の表面に基層
２ａ及びアルミナ被覆層２ｂからなる耐高温性の電気絶
縁被膜２を形成する。After forming the base layer 2a and the alumina coating layer 2b as described above, they were pre-dried at room temperature for about 1 hour, and then
By firing at a temperature of 0° C., a high temperature resistant electrically insulating coating 2 consisting of a base layer 2a and an alumina coating layer 2b is formed on the surface of the metal plate.
上記の粒状結晶アルミナの被覆層２ｂは、８００〜９０
０℃のような高温度においても充分高い電気絶縁性を保
持する。The coating layer 2b of the above granular crystal alumina has an 800 to 90%
Maintains sufficiently high electrical insulation even at high temperatures such as 0°C.
従って、この被覆層２ｂに接触させて高温の電熱線３を
設置しても、該電熱線と金属板１との間の電気絶縁は極
めて良好に保たれる。Therefore, even if the high-temperature heating wire 3 is installed in contact with the coating layer 2b, the electrical insulation between the heating wire and the metal plate 1 is maintained extremely well.
上記のように本発明は、金属板の表面にアルミナの粉末
と水硝子の混合物からなる基層を形成し、該基層の上に
粒状結晶アルミナの被覆層を形成するようにしており、
前記アルミナの被覆層は極めて良好な耐高温電気絶縁性
を有するので、本発明によれば金属板の表面に耐高温性
の極めて良好な電気絶縁被膜を施すことができる。As described above, in the present invention, a base layer made of a mixture of alumina powder and water glass is formed on the surface of a metal plate, and a coating layer of granular crystal alumina is formed on the base layer.
Since the alumina coating layer has extremely good high-temperature resistance and electrical insulation, according to the present invention, an electrical insulation coating with extremely good high-temperature resistance can be applied to the surface of a metal plate.
従って、金属板の被膜に電熱線を直接に接触させて該金
属板を高温度に加熱するような場合でも、電熱線は被膜
表面の結晶アルミナにのみ接触するので、電熱線と金属
板の間の電気絶縁を充分良好に保つことができる。Therefore, even when a heating wire is brought into direct contact with the coating on a metal plate to heat the metal plate to a high temperature, the heating wire only contacts the crystalline alumina on the surface of the coating, so the electricity between the heating wire and the metal plate is reduced. Insulation can be maintained sufficiently well.
図面は本発明の方法の実施態様を示す説明図である。
１・・・・・・金属板、２ａ・・・・・・アルミナの粉
末と水硝子の混合物からなる基層、２ｂ・・・・・・粒
状結晶アルミナの被覆層、
２・・・・・・電気絶縁被膜。The drawings are explanatory views showing embodiments of the method of the present invention. 1... Metal plate, 2a... Base layer made of a mixture of alumina powder and water glass, 2b... Coating layer of granular crystal alumina, 2... Electrical insulation coating.
Claims (1)
を金属板の表面に塗布して基層を形成し、該基層の上に
粒状結晶アルミナを平均的に振りかげアルミナの被覆層
を形成して予備乾燥した後、所定の高温度で焼成して前
記両層からなる電気絶縁被膜を形成をせることを特徴と
する金属板に耐高温電気絶縁被膜を施す方法。1 A paste made by mixing alumina powder and water glass is applied to the surface of a metal plate to form a base layer, and granular crystal alumina is evenly sprinkled on the base layer to form an alumina coating layer. A method for applying a high temperature resistant electrical insulating coating to a metal plate, the method comprising: pre-drying the metal plate and then firing at a predetermined high temperature to form an electrical insulating coating consisting of both of the layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1115081A JPS5831108B2 (en) | 1981-01-28 | 1981-01-28 | Method of applying high temperature resistant electrical insulation coating to metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1115081A JPS5831108B2 (en) | 1981-01-28 | 1981-01-28 | Method of applying high temperature resistant electrical insulation coating to metal plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57125267A JPS57125267A (en) | 1982-08-04 |
| JPS5831108B2 true JPS5831108B2 (en) | 1983-07-04 |
Family
ID=11769984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1115081A Expired JPS5831108B2 (en) | 1981-01-28 | 1981-01-28 | Method of applying high temperature resistant electrical insulation coating to metal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5831108B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11241940B2 (en) | 2016-12-07 | 2022-02-08 | Hanon Systems | Thermal management system for vehicle |
-
1981
- 1981-01-28 JP JP1115081A patent/JPS5831108B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11241940B2 (en) | 2016-12-07 | 2022-02-08 | Hanon Systems | Thermal management system for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57125267A (en) | 1982-08-04 |
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