JPS62249310A - Manufacture of rectangular insulated wire - Google Patents
Manufacture of rectangular insulated wireInfo
- Publication number
- JPS62249310A JPS62249310A JP9192486A JP9192486A JPS62249310A JP S62249310 A JPS62249310 A JP S62249310A JP 9192486 A JP9192486 A JP 9192486A JP 9192486 A JP9192486 A JP 9192486A JP S62249310 A JPS62249310 A JP S62249310A
- Authority
- JP
- Japan
- Prior art keywords
- resin powder
- synthetic resin
- coating
- rectangular
- insulated wire
- 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 13
- 239000000843 powder Substances 0.000 claims description 30
- 238000000576 coating method Methods 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 25
- 229920003002 synthetic resin Polymers 0.000 claims description 19
- 239000000057 synthetic resin Substances 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 description 8
- 238000007598 dipping method Methods 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003261 Durez Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、静電粉体塗装法、特に静電流浸漬法による平
角絶縁電線の製）告方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a method for manufacturing rectangular insulated wires by electrostatic powder coating, particularly by electrostatic dipping.
（従来の技術〉
近年、粉体塗装法による絶縁電線の製造方法が無公害、
省責源、省エネルギーの観点から注目されてきており、
この中でも塗着効率が高く薄い塗膜を形成させ得る方法
として静電流浸漬法が絶縁電線製造の分野で１２＋に脚
光をあびつつある。(Conventional technology) In recent years, insulated wire manufacturing methods using powder coating methods have become pollution-free and
It is attracting attention from the viewpoint of saving resources and saving energy.
Among these, the electrostatic current dipping method is attracting attention in the field of insulated wire manufacturing as a method that has high coating efficiency and can form a thin coating film.
この方法は、直流の高電圧を印加された電極間を通過し
た乾燥空気により、合成樹脂粉体に電荷を与えつつこれ
を流動化させ、この雲体状の合成樹脂粉体からなるコー
ティングゾーンを通過する金属導体表面に室温で静電気
的に合成樹脂粉体を句６ざＵた後、付着した合成樹脂粉
体を加熱溶融および硬化させて被膜を形成させる方法で
ある。This method uses dry air passed between electrodes to which a high DC voltage is applied to fluidize the synthetic resin powder while giving it an electric charge, thereby forming a coating zone made of cloud-shaped synthetic resin powder. In this method, synthetic resin powder is electrostatically applied to the surface of a passing metal conductor at room temperature, and then the adhering synthetic resin powder is heated to melt and harden to form a film.
（発明が解決しようとする問題点）
しかして金属導体として例えば平角導体を用いこれをコ
ーティングゾーンを水平方向に通過させて塗装を行う場
合には、平角導体の各側面に形成される絶縁被膜の絶縁
破壊電圧が安定しないという難点があった。これは平角
絶縁電線の軸方向に沿って絶縁破壊電圧を測定するとそ
の値がバラつぎ、一部は低い値を示すことからし明らか
なように被膜厚さが均一でないことに起因してｔｉす、
詳細に検討した結果、絶縁被膜表面に生成するピン１ｆ
ｉ−ルや被膜内部に残存するボイドが主原因で必ること
か明らかとなった。(Problem to be Solved by the Invention) However, when a rectangular conductor, for example, is used as the metal conductor and the coating is carried out by passing it horizontally through a coating zone, the insulating coating formed on each side of the rectangular conductor is The problem was that the dielectric breakdown voltage was unstable. This is because when the dielectric breakdown voltage is measured along the axial direction of a rectangular insulated wire, the values vary, and some of the values are low, so it is clear that the coating thickness is not uniform. ,
As a result of detailed study, pin 1f generated on the surface of the insulation coating.
It became clear that the main cause was voids remaining in the core or inside the coating.
本発明は、上記の知見に基づいてなされた−６ので、静
電流動浸漬法により平角絶縁電線を製造する場合に、絶
縁破壊電圧を向上せしめることのでさる方法を提供する
ことをその目的とする。The present invention has been made based on the above-mentioned findings, and an object of the present invention is to provide a method for improving the dielectric breakdown voltage when manufacturing rectangular insulated wires by the electrostatic dynamic dipping method. .
［発明の構成］
（問題点を解決するための手段と作用）本発明は、平角
導体を、帯電した合成樹脂粉体を充満させたコー”フイ
ングゾーンを水平方向に通過さけて、その表面に前記合
成樹脂粉体を付着させ、次いで加熱炉に通過させること
により付着した合成樹脂粉体を融６′ｔ！シめて絶縁被
膜を形成する絶縁電線の製造方法において、前記コーテ
ィングゾーン通過前の平角導体表面を前記合成樹脂粉体
の融点近傍まで予熱することにより、均一な厚さの被膜
が得られ、かつ被膜内部のボイドの残存率を低トＵしめ
、絶縁破壊電圧を向上させるようにしたしのである。[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention involves horizontally passing a rectangular conductor through a coring zone filled with charged synthetic resin powder, and applying the above to its surface. In a method for manufacturing an insulated wire, in which a synthetic resin powder is attached and then the attached synthetic resin powder is melted by passing through a heating furnace to form an insulating coating, the rectangular wire before passing through the coating zone. By preheating the conductor surface to near the melting point of the synthetic resin powder, a film with a uniform thickness can be obtained, and the residual rate of voids inside the film can be reduced to improve dielectric breakdown voltage. It's Shino.
１−記の平角導体表面の予熱は伝熱炉等を用いることし
でざるか短１１！１間て゛効率的に加熱するために誘導
加熱によることか好ましい。The preheating of the surface of the rectangular conductor described in item 1-1 does not require the use of a heat transfer furnace or the like, but is preferably performed by induction heating in order to efficiently heat the conductor for a short period of time.
また予熱温度は合成樹脂粉体の融点以下でも有効である
が、融点直上、例えば融点から（融点＋１０’Ｃ）の範
囲に表面を予熱しＣ１この状態のままコー）゛イングゾ
ーンへ導入することが有効で必る。Although it is effective to preheat at a temperature below the melting point of the synthetic resin powder, it is recommended to preheat the surface to just above the melting point, for example in the range from the melting point to (melting point +10'C), and then introduce the powder into the coating zone in this state. is valid and necessary.
（実施例） 以下本発明の一実施例について説明する。(Example) An embodiment of the present invention will be described below.
図は本発明の平角絶縁電線の製造に用いられる製Ｊ２！
Ｇ置の概略を示したものである。The figure shows J2 manufactured by J2, which is used for manufacturing the rectangular insulated wire of the present invention!
This is an outline of the G position.
図において符月１はコーティングゾーン（粉体塗装室）
、２は誘導加熱装置、３は加熱炉である。In the figure, sign month 1 is the coating zone (powder coating room)
, 2 is an induction heating device, and 3 is a heating furnace.
上記の装置において、心線供給架台４から連続的に送り
出された平角心線Ｗはブレーキ装置５を経て誘導加熱装
置２を通過し、その表面が合成樹脂粉体の融点直上の温
度に予熱される。In the above device, the rectangular core wire W continuously sent out from the core wire supply frame 4 passes through the brake device 5 and the induction heating device 2, and its surface is preheated to a temperature just above the melting point of the synthetic resin powder. Ru.
次いでコーティングゾーン１内でその表面に合成樹脂粉
体がイ」肴ヒしめられるが、この時心線表面に直接接触
する粉体粒子は直らに溶融せしめられ一次被膜層を形成
する。Synthetic resin powder is then applied to the surface of the core wire in the coating zone 1, and at this time, the powder particles that are in direct contact with the surface of the core wire are immediately melted to form a primary coating layer.
この溶融合成樹脂層を有する平角導体Ｗ′は、更に加熱
炉３を通過することにより均一な厚さの被膜が形成され
巻取装置６に巻取られる。The rectangular conductor W' having the molten synthetic resin layer is further passed through a heating furnace 3 to form a coating having a uniform thickness, and then wound into a winding device 6.
以上の方法においては、平角線の表面が予熱されている
ために一次被膜層が形成されているため、その後の粉体
の溶融時にボイドが減少するとともに表面の平滑度が向
上し、絶縁破壊電圧が著しく向上する。In the above method, since the surface of the rectangular wire is preheated and a primary coating layer is formed, voids are reduced during subsequent melting of the powder and the surface smoothness is improved, resulting in dielectric breakdown voltage. is significantly improved.
心線供給架台から２．ＯＸ ５．Ｏｍｉ断面の平角導体
を線速３．Ｏｍ／ｍｉｎ水平方向に引出し、この表面を
誘導加熱装置により７５℃に予熱した後、コーティング
ゾーンに通過ざぜて導体表面に合成樹脂粉体を付着ｕし
め、次いで粉体が付着されたこの平角導体を炉温４５０
℃炉艮３．５ｍの加熱炉を通して前記樹脂粉体を融着お
よび硬化させて被膜を形成させた。2. From the core wire supply stand. OX5. A rectangular conductor with an Omi cross section at a linear velocity of 3. 0m/min horizontally, the surface is preheated to 75°C by an induction heating device, and then passed through a coating zone to adhere synthetic resin powder to the conductor surface, and then this rectangular conductor with the powder applied Furnace temperature 450
The resin powder was fused and cured through a heating furnace with a length of 3.5 m to form a film.
上記のコーティングゾーン内の粉体雲は、ＥＣＰ２Ｏ＆
（住友デュレズ社製 エポキシ系合成樹脂粉体＝商品名
；融点７０’Ｃ）を艮ｇ７０ｃＴｌｌのゾーン内で、帯
電電圧−５５ｋＶ流動化空気■１２５℃／ｍｉｎ静止１
シ）体層の厚ざ５０＋ａｍの条イイ１で形成した。The powder cloud in the above coating zone is ECP2O&
(Epoxy synthetic resin powder manufactured by Sumitomo Durez Co., Ltd. = trade name; melting point 70'C) was charged at a charging voltage of -55kV with fluidized air ■125℃/min stationary 1 in a zone of 70cTll.
c) The body layer was formed of strips 1 with a thickness of 50+ am.
得られた絶縁電線の被膜の絶縁破壊電圧を心線の長さ方
向に沿って測定した結果を次表に示す。The dielectric breakdown voltage of the coating of the obtained insulated wire was measured along the length of the core wire, and the results are shown in the following table.
なお、表中比較例として示したものは、誘導加熱するこ
となく他の条件は実施例と同様にして従来通り粉体塗装
を行って得られた絶縁電線について、絶縁破壊電圧を同
様にして測定した結果である。The comparative examples in the table are insulated wires obtained by performing powder coating in the conventional manner under the same conditions as in the examples without induction heating, and the dielectric breakdown voltage was measured in the same manner. This is the result.
（以下余白）
（表中の数１直の単位はｋｖである）
以上の測定結果から、平角導体の周囲に絶縁被膜を形成
するにあたり、粉体付着前の平角導体表面を予熱するこ
とにより、従来の方法に比べて高い絶縁破壊電圧を有す
る絶縁電線が製造され、しかもその製）告を容易に行う
ことができることが判る。(Left below) (The unit of number 1 in the table is kv) From the above measurement results, when forming an insulating film around a rectangular conductor, by preheating the surface of the rectangular conductor before powder is attached, It can be seen that an insulated wire having a higher dielectric breakdown voltage than the conventional method can be manufactured, and that the manufacturing process can be easily carried out.
［発明の効果］
以上説明したように本発明によれば、コーティングゾー
ン通過前の平角導体表面を合成樹脂粉体の融点近傍に予
熱することにより、被膜厚のパラつきが少なく、従って
電機的特性に優れた絶縁電線を効率よく製造することが
できる。[Effects of the Invention] As explained above, according to the present invention, by preheating the surface of the rectangular conductor before passing through the coating zone to near the melting point of the synthetic resin powder, variation in film thickness is reduced, and therefore electrical properties are improved. It is possible to efficiently manufacture insulated wires with excellent properties.
図は本発明の平角絶縁電線の製造方法に用いられる製）
Ｈ装置の概略図である。
１・・・・・・・・・コーティングゾーン２・・・・・
・・・・誘導加熱装置
３・・・・・・・・・加熱炉(The figure shows a product used in the manufacturing method of the rectangular insulated wire of the present invention)
FIG. 2 is a schematic diagram of the H device. 1...Coating zone 2...
...Induction heating device 3 ...Heating furnace
Claims (2)
コーティングゾーンを水平方向に通過させて、その表面
に前記合成樹脂粉体を付着させ、次いで加熱炉に通過さ
せることにより付着した合成樹脂粉体を融着せしめて絶
縁被膜を形成する絶縁電線の製造方法において、前記コ
ーティングゾーン通過前の平角導体表面を前記合成樹脂
粉体の融点近傍まで予熱することを特徴とする平角絶縁
電線の製造方法。(1) A rectangular conductor is passed horizontally through a coating zone filled with charged synthetic resin powder to deposit the synthetic resin powder on its surface, and then passed through a heating furnace to deposit the synthetic resin powder. A method for producing an insulated wire by fusing resin powder to form an insulating film, characterized in that the surface of the rectangular conductor before passing through the coating zone is preheated to near the melting point of the synthetic resin powder. Production method.
１項記載の平角絶縁電線の製造方法。(2) The method for manufacturing a rectangular insulated wire according to claim 1, wherein the preheating is performed by induction heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9192486A JPS62249310A (en) | 1986-04-21 | 1986-04-21 | Manufacture of rectangular insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9192486A JPS62249310A (en) | 1986-04-21 | 1986-04-21 | Manufacture of rectangular insulated wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62249310A true JPS62249310A (en) | 1987-10-30 |
Family
ID=14040131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9192486A Pending JPS62249310A (en) | 1986-04-21 | 1986-04-21 | Manufacture of rectangular insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62249310A (en) |
-
1986
- 1986-04-21 JP JP9192486A patent/JPS62249310A/en active Pending
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