JPS5917483B2 - Manufacturing method of flat insulated wire - Google Patents

Description

【発明の詳細な説明】 本発明は、平角絶縁電線の製造方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a rectangular insulated wire.

従来の平角絶縁電線は、所定サイズに圧延され５ た平
角の導体上に塗料をｌ回若しくは複数回塗布焼付けて製
造されているが、この方法では平角導体のエッジ部をフ
ラット面と同様に均一な皮膜をもつた絶縁電線を製造す
ることがむづかしい。Conventional rectangular insulated wires are manufactured by coating and baking paint one or more times on a rectangular conductor that has been rolled to a predetermined size, but with this method, the edges of the rectangular conductor are uniformly coated in the same manner as the flat surface. It is difficult to manufacture insulated wires with such a coating.

たとえエッジ部に塗料を塗布出来ても、焼付炉０ 中で
塗料の温度が上昇し塗料の流動性が増大し、焼付後のエ
ッジ部の皮膜は薄くしか被覆出来ない事が多くその改善
に苦心が払われている。又音響機器等には薄厚の平角絶
縁電線が用いられており、これは、一種の箔様体であり
、このような箔様体５ のエッジ部をフラット面同様に
均一に皮膜を被覆させることは殆んど不可能に近い。こ
れに反し、断面丸形の絶縁電線を圧延することにより得
られる平角絶縁電線はエッジ部の皮膜、フラット面の皮
膜共に均一に塗布出来たものが得０ られる。Even if paint can be applied to the edges, the temperature of the paint rises in the baking oven and the fluidity of the paint increases, and the coating on the edges after baking is often only thin, making it difficult to improve. is being paid. In addition, thin rectangular insulated wires are used in audio equipment, etc., and this is a kind of foil-like body, and it is necessary to coat the edges of such a foil-like body 5 with a film evenly like the flat surface. is almost impossible. On the other hand, a rectangular insulated wire obtained by rolling an insulated wire with a round cross section has a coating uniformly applied to both the edges and the flat surface.

しかし、この丸線を圧延する場合、特公昭４９−７４２
８号に述べてあるように圧延によつて厚みと幅の厄■：
５を越える値の比になると、圧延時に皮膜に亀裂を発生
することが多い。又圧延後の平角絶縁電線を熱処理し導
体を軟化５ させる際、ヒートショックを受けて皮膜に
亀裂が発生することがある。又上述のような亀裂が発生
しないでも、皮膜の電気特性は大幅に低下するのが通常
であつた。本発明者等は、この様な欠点を改善し厚みと
幅０ の比がｌ：１２までの値の比の平角絶縁電線を製
造することを開発した。However, when rolling this round wire,
As stated in No. 8, thickness and width problems due to rolling ■:
When the ratio exceeds 5, cracks often occur in the coating during rolling. Furthermore, when the rectangular insulated wire is heat-treated after rolling to soften the conductor, cracks may occur in the coating due to heat shock. Furthermore, even if the above-mentioned cracks do not occur, the electrical properties of the film usually deteriorate significantly. The inventors of the present invention have developed a method of manufacturing rectangular insulated wires having a thickness-to-width ratio of up to 1:12 by improving such drawbacks.

即ち本発明は断面楕円形の導体を用い、その上に塗料を
ｌ回乃至複数回焼付けすることにより断面が楕円形の絶
縁電線を得、次いでこの絶縁電線の短軸を圧下すること
によつ５ て、容易に厚みと幅の比が１：１２までの値
の比では皮膜に亀裂を生じない平角絶縁電線を製造する
ものである。この断面が楕円形の絶縁電線の製造は、ま
ず導体を通常の伸線機を用い断面が楕円形のダイを通す
ことによつて製造し、更に通常の焼付炉を用いて絶縁塗
料を１回或いは複数回塗布焼付けることによつて製造出
来る。That is, the present invention uses a conductor with an oval cross section, bakes paint on it one or more times to obtain an insulated wire with an oval cross section, and then compresses the short axis of this insulated wire. 5. Therefore, it is possible to easily produce a rectangular insulated wire that does not cause cracks in the coating when the ratio of thickness to width is up to 1:12. This insulated wire with an oval cross section is manufactured by first passing the conductor through a die with an oval cross section using an ordinary wire drawing machine, and then applying insulating paint once using an ordinary baking furnace. Alternatively, it can be manufactured by coating and baking multiple times.

なお塗料を塗布する場合はフエルト、ダイス、ワイパー
ローラー等で塗布すればよく、場合によつてはデイピン
グ方式で塗布することも出来る。この楕円形導体に塗料
を塗布焼付ける場合、平角線と異なり、全体に丸昧を持
つている為に、均一に塗膜を形成させることが出来る。When applying the paint, it may be applied using a felt, a die, a wiper roller, etc. Depending on the case, it may be applied by a dipping method. When applying paint to this elliptical conductor and baking it, unlike a rectangular wire, the conductor has a round shape throughout, so it is possible to form a uniform paint film.

ただし楕円形の短軸と長軸の比によつて、楕円周上の皮
膜の均一性が異なつて来ることがある。However, the uniformity of the coating on the circumference of the ellipse may vary depending on the ratio of the short axis to the long axis of the ellipse.

短軸と長軸の比が１：１以上の値の比から１：３以下の
値の比までであれば略々均一に塗膜が形成されるが、好
ましいのは短軸と長軸の比が１：２以下の値の比のもの
が良い。以下本発明を例示図面により詳細に説明する。If the ratio of the short axis to the long axis is from a value of 1:1 or more to a value of 1:3 or less, a coating film will be formed almost uniformly, but it is preferable that the ratio of the short axis to the long axis be Preferably, the ratio is 1:2 or less. The present invention will be explained in detail below with reference to illustrative drawings.

従来の断面丸形導体の絶縁電線を圧延した場合を第１図
に、本発明の楕円形導体の絶縁電線を圧延した場合を第
２図に示してある。第２図中ａは楕円の短軸、ｂは楕円
の長軸である。断面丸形導体１と絶縁皮膜２からなる絶
縁電線Ａを圧延すると平角絶縁電線Ｂが得られるが、こ
の場合厚みと幅の比が１：５以上の値の比になると皮膜
に亀裂が発生し実用に供し得る平角絶縁電線が得られな
い。FIG. 1 shows a case in which a conventional insulated wire having a round cross-section conductor is rolled, and FIG. 2 shows a case in which an insulated wire having an elliptical conductor according to the present invention is rolled. In FIG. 2, a is the short axis of the ellipse, and b is the long axis of the ellipse. When an insulated wire A consisting of a conductor 1 with a round cross section and an insulating film 2 is rolled, a rectangular insulated wire B is obtained, but in this case, if the ratio of thickness and width becomes 1:5 or more, cracks will occur in the film. It is not possible to obtain a rectangular insulated wire that can be put to practical use.

しかし楕円形導体３と絶縁皮膜４からなる絶縁電線Ｃを
圧延すると、厚みと幅の比を１：１２程度の値の比に迄
圧延しても皮膜に亀裂が発生せす、充分実用に供し得る
平角絶縁電線Ｄが得られた。However, when an insulated wire C consisting of an elliptical conductor 3 and an insulating film 4 is rolled, cracks occur in the film even if the thickness to width ratio is approximately 1:12, which is insufficient for practical use. A flat insulated wire D was obtained.

本発明では断面が楕円形の絶縁電線を圧延するから楕円
形に於いて長軸の短軸に対する比率を変えることにより
、丸線と同一圧延比でも厚みに対し幅の大きな平角絶縁
電線を製造するのに有利と言える。又短軸の方向で圧延
すると、ローラーと接する絶縁電線の表面積は、断面丸
形の絶縁電線を圧延するのに比較して大きくなり、剪断
力よりも圧下する力が大きくなり、主として剪断力によ
つて生じていた皮膜の亀裂が起こり難くなり、それにと
もなつて圧延比率を１：１２まで増大させても皮膜に亀
裂が発生し難くなつたものと考えられる。In the present invention, since an insulated wire with an oval cross section is rolled, by changing the ratio of the long axis to the short axis in the oval shape, a rectangular insulated wire with a larger width than thickness can be manufactured even at the same rolling ratio as a round wire. It can be said that it is advantageous. Also, when rolling in the direction of the short axis, the surface area of the insulated wire in contact with the roller is larger than when rolling an insulated wire with a round cross section, and the rolling force is greater than the shearing force, and the shearing force is the main factor. It is thought that this makes it difficult for the film to crack, and as a result, even if the rolling ratio is increased to 1:12, cracks are less likely to occur in the film.

なお本発明に於いて圧延による導体の加工硬化を除くた
め圧延後熱処理することもある。以下本発明の実施例を
参照例と比べ乍ら説明する。In the present invention, heat treatment may be performed after rolling in order to remove work hardening of the conductor due to rolling. Examples of the present invention will be described below while comparing them with reference examples.

参照例 １ 導体径０．２６ｍｍφの１種構造ポリエステルイミド絶
縁電線を、線速４０ｍ／Ｍｒｎで、皮膜に亀裂が発生す
るまで圧延した。Reference Example 1 A single-structure polyesterimide insulated wire with a conductor diameter of 0.26 mmφ was rolled at a wire speed of 40 m/Mrn until cracks appeared in the coating.

得られた平角絶縁電線から皮膜を剥離し、導体の厚みと
幅を測定すると夫夫０．１２０ｍＬ０．５３０ｍ７ｆＬ
であつた。（幅／厚み＝４．４２）参照例 ２ 導体径０．５５ｍｍφの１種構造ポリアミドイミド絶縁
電線を、線速３０ｍ／Ｍｌｎで、皮膜に亀裂が発生する
まで圧延した。The film was peeled off from the obtained rectangular insulated wire, and the thickness and width of the conductor were measured to be 0.120 mL, 0.530 m, and 7 fL.
It was hot. (Width/Thickness=4.42) Reference Example 2 A type 1 structure polyamide-imide insulated wire with a conductor diameter of 0.55 mm was rolled at a wire speed of 30 m/Mln until cracks appeared in the coating.

得られた平角絶縁電線から皮膜を剥離し、導体の厚みと
幅を測定すると夫々０．２０５ｍｍ１１．０２１ｍｍで
あつた。（幅／厚み４．９８）参照例 ３ 導体径０．４０ｍｍφの１種構造をもつ二重構造皮膜（
下引：ポリエステルイミド、上引：ポリアミドイミド）
の絶縁電線を、線速３５ｍ／Ｍｉｎで、皮膜に亀裂が発
生するまで圧延した。The film was peeled off from the obtained rectangular insulated wire, and the thickness and width of the conductor were measured to be 0.205 mm and 11.021 mm, respectively. (Width/thickness 4.98) Reference example 3 Double structure film with type 1 structure with conductor diameter 0.40mmφ (
Bottom coating: polyesterimide, top coating: polyamideimide)
The insulated wire was rolled at a wire speed of 35 m/min until cracks appeared in the coating.

得られた平角絶縁電線から皮膜を剥離し、導体の厚みと
幅を測定すると夫々０．１６３ｍｍ１０．７７０ｍｍで
あつた。（幅／厚み−４．７２）実施例 １ 参照例１で用いた丸形絶縁電線にかわつて、導体断面積
が０．２６ｍｍφの丸形導体に等しい楕円形導体（短軸
：０．１０６ｍｍ１長軸：０．１５９ｍｍ）に１種構造
で仕上げたポリエステルイミド線を線速４０ｍ／ＭｌＴ
ｌで、厚みに対する幅の比が約１１になる様に短軸方向
から圧延した。The film was peeled off from the obtained rectangular insulated wire, and the thickness and width of the conductor were measured to be 0.163 mm and 10.770 mm, respectively. (Width/Thickness - 4.72) Example 1 Instead of the round insulated wire used in Reference Example 1, an elliptical conductor (short axis: 0.106 mm, long axis :0.159mm) with a type 1 structure finished at a linear speed of 40m/MlT.
1 from the short axis direction so that the ratio of width to thickness was about 11.

得られた平角絶縁電線は皮膜に亀裂は発生しておらず、
その後皮膜を剥離し導体の厚みと幅を測定すると夫々０
．１０５ｍｍ１１．１９５ｍｍであつた。（幅／厚み二
１１．３８）実施例 ２参照例２で用いた丸形絶縁電線
にかわつて、導体断面積が０．５５ｍｍφの丸形導体に
等しい楕円形導体（短軸：０．１９４Ｗ！１１長軸０．
３８８ｍＴＬ）に１種構造で仕上げたポリアミドイミド
絶縁電線を、線速３０ｍ／Ｍｉｎで、短軸方向から圧延
した。The obtained rectangular insulated wire had no cracks in its coating.
After that, when the film was peeled off and the thickness and width of the conductor were measured, they were 0.
．． It was 105 mm and 11.195 mm. (Width/Thickness 2: 11.38) Example 2 Instead of the round insulated wire used in Reference Example 2, an elliptical conductor (minor axis: 0.194W! 11 Long axis 0.
A polyamide-imide insulated wire finished with a type 1 structure (388 mTL) was rolled from the short axis direction at a wire speed of 30 m/min.

得られた平角絶縁電線は皮膜に亀裂は発生しておらず、
その後皮膜を剥離し導体の厚みと幅を測定すると夫々０
．１３０ｍｍ１１．６０９６ｍｍであつた。（幅／厚み
二１２。３８） 実施例 ３ 参照例３で用いた丸形絶縁電線にかわつて、導体断面積
が０．４０ｍｍφの丸形導体に等しい楕円形導体（短軸
：０．１６３龍、長軸：０．２４５ｍｍ）に１種構造で
仕上げた二重構造皮膜（下引：ポリエステルイミド、上
引：ポリアミドイミド）の絶縁電線を線速３５ｍ／Ｍｉ
ｎで、短軸方向から圧延した。The obtained rectangular insulated wire had no cracks in its coating.
After that, when the film was peeled off and the thickness and width of the conductor were measured, they were 0.
．． It was 130mm x 11.6096mm. (Width/thickness 2 12.38) Example 3 Instead of the round insulated wire used in Reference Example 3, an elliptical conductor (minor axis: 0.163mm, An insulated wire with a double structure coating (lower layer: polyester imide, upper layer: polyamideimide) finished with a single structure on the long axis: 0.245 mm) was wired at a wire speed of 35 m/Mi.
Rolling was carried out from the minor axis direction.

得られた平角絶縁電線は皮膜に亀裂は発生しておらず、
その後皮膜を剥離し導体の厚みと幅を測定すると夫々０
．１０８ｍｍ１１．１６２闘であつた。（幅／厚み−１
０，７６）以上の通り本発明によると亀裂の発生しない
乃至は電気特性の低下しない平角絶縁電線が容易に得ら
れる。The obtained rectangular insulated wire had no cracks in its coating.
After that, when the film was peeled off and the thickness and width of the conductor were measured, they were 0.
．． It was 108mm 11.162 seconds. (width/thickness -1
0,76) As described above, according to the present invention, a rectangular insulated wire without cracking or deterioration of electrical properties can be easily obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は断面丸形の絶縁電線を平角に圧延した場合の圧
延前の電線断面図（イ図）と圧延後の電線断面図（口図
）、第２図は楕円形の絶縁電線を平角に圧延した場合の
圧延前の電線の断面図（イ図）と圧延後の電線断面図（
口図）を夫々例示している。 １，１″・・・・・・導体、２，２′・・・・・・絶縁
皮膜、３，３′・・・・・・導体、４，４′・・・・・
・絶縁皮膜、ａ・・・・・・楕円の短軸、ｂ・・・・・
・楕円の長軸。Figure 1 shows a cross-sectional view of an insulated wire with a round cross section rolled into a flat shape before rolling (Figure A) and a cross-sectional view of the wire after rolling (Figure 2). Figure 2 shows an insulated wire with an oval cross section rolled into a flat shape. A cross-sectional view of the electric wire before rolling (Figure A) and a cross-sectional view of the electric wire after rolling (Fig.
The following are examples of the following. 1,1''...Conductor, 2,2'...Insulating film, 3,3'...Conductor, 4,4'...
・Insulating film, a...Short axis of ellipse, b...
- Long axis of the ellipse.

Claims (1)

【特許請求の範囲】 １ 断面が楕円形の導体に塗料を塗布焼付けした絶縁電
線を楕円の短軸方向に圧延ロールによつて平角に圧延す
ることを特徴とする平角絶縁電線の製造方法。 ２ 圧延後熱処理する特許請求の範囲第１項記載の平角
絶縁電線の製造方法。 ３ 圧延による厚みと幅の比が１：５以上の値の比を有
する特許請求の範囲第１項、又は第２項記載の平角絶縁
電線の製造方法。[Claims] 1. A method for manufacturing a rectangular insulated wire, which comprises rolling an insulated wire made by coating and baking a paint onto a conductor having an elliptical cross section into a rectangular shape using rolling rolls in the direction of the minor axis of the ellipse. 2. A method for manufacturing a rectangular insulated wire according to claim 1, which includes heat treatment after rolling. 3. The method for manufacturing a rectangular insulated wire according to claim 1 or 2, wherein the ratio of thickness to width by rolling is 1:5 or more.