JP2542304B2 - Air core coil manufacturing method - Google Patents

Air core coil manufacturing method

Info

Publication number
JP2542304B2
JP2542304B2 JP3347799A JP34779991A JP2542304B2 JP 2542304 B2 JP2542304 B2 JP 2542304B2 JP 3347799 A JP3347799 A JP 3347799A JP 34779991 A JP34779991 A JP 34779991A JP 2542304 B2 JP2542304 B2 JP 2542304B2
Authority
JP
Japan
Prior art keywords
self
air
winding
core coil
bonding
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 - Lifetime
Application number
JP3347799A
Other languages
Japanese (ja)
Other versions
JPH0696977A (en
Inventor
雄三 山崎
大介 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Totoku Electric Co Ltd
Original Assignee
Totoku Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Totoku Electric Co Ltd filed Critical Totoku Electric Co Ltd
Priority to JP3347799A priority Critical patent/JP2542304B2/en
Publication of JPH0696977A publication Critical patent/JPH0696977A/en
Application granted granted Critical
Publication of JP2542304B2 publication Critical patent/JP2542304B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439Auxiliary devices
    • G02B6/4457Bobbins; Reels

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Insulating Of Coils (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は耐熱変形性に優れた空芯
コイルの製造法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an air core coil having excellent heat distortion resistance.

【0002】[0002]

【従来の技術】VTR(ビデオテープレコーダー)やF
DD(フロッピーディスクドライブ装置)等に用いられ
る偏平型ブラシレスDCモータのステータコイルなどの
空芯コイルは、自己融着性エナメル電線を巻回し、自己
融着性エナメル電線相互を融着固化したものである。こ
れらの空芯コイルに用いられる線材には熱軟化温度が12
0〜150℃程度のポリビニルブチラール樹脂やポリアミド
樹脂などの熱可塑性樹脂を主成分とする接着塗料を、導
体上に絶縁皮膜を介して塗布,焼付けて製造された自己
融着性エナメル電線が用いられている。空芯コイルの製
造法は上記自己融着性エナメル電線をコイル巻型に巻裝
し、巻裝された自己融着性エナメル電線相互に熱風を吹
き付けて自己融着性エナメル電線相互を融着固化した後
巻型から取り出して空芯コイルを得るものである。この
方法は比較的簡単に自己支持型の空芯コイルを製造する
ことが可能であり、空芯コイルの製造に多用されてい
た。
2. Description of the Related Art VTR (video tape recorder) and F
An air core coil such as a stator coil of a flat type brushless DC motor used for a DD (floppy disk drive device) is formed by winding self-bonding enamel wires and fusing and solidifying the self-bonding enamel wires. is there. The wire used for these air-core coils has a thermal softening temperature of 12
Self-fusing enamel wire is used, which is manufactured by applying an adhesive coating containing a thermoplastic resin such as polyvinyl butyral resin or polyamide resin at 0 to 150 ° C as a main component through an insulating film and baking it. ing. The method of manufacturing the air-core coil is to wind the above self-bonding enamel wire into a coil winding form and blow hot air to the wound self-bonding enamel wires to fuse and solidify the self-bonding enamel wires. After that, the air core coil is obtained by taking out from the winding form. This method can relatively easily manufacture a self-supporting air-core coil, and has been widely used for manufacturing an air-core coil.

【0003】[0003]

【発明が解決しようとする課題】これら空芯コイルは、
例えばステータコイルのようにプリント基板にはんだで
直付けされて使用されることが多い。このはんだ付け法
として、空芯コイルの自己融着性エナメル電線の両端末
の導体を露出させ、この空芯コイルの両端末の導体露出
部をプリント基板のクリーム状はんだの塗布された位置
に配置してからこのプリント基板を220〜240℃の温度に
加熱されたリフロー炉に一定時間通し、クリーム状のは
んだを溶融させ、空芯コイルをプリント基板の回路パタ
ーン上に直接はんだ付けするいわゆるリフロー法が用い
られている。このリフロー法を用いてはんだ付けした場
合、空芯コイルの隣接する自己融着性エナメル電線は熱
可塑性樹脂の融着皮膜で固着されているため、リフロー
炉の220〜240℃の高温に数秒〜数十秒間さらされると融
着皮膜が熱軟化し、巻線されているコイル線材にばらけ
やほつれが生じたり、コイルの形状に変形を生じ、耐熱
性,耐熱変形性の面で信頼性に問題があった。
These air-core coils have the following problems.
For example, a stator coil is often used by being directly attached to a printed circuit board by soldering. As this soldering method, the conductors of both ends of the self-bonding enamel wire of the air-core coil are exposed, and the conductor exposed parts of both ends of this air-core coil are placed at the positions where the cream solder is applied on the printed circuit board. Then, this printed circuit board is passed through a reflow oven heated to a temperature of 220 to 240 ° C for a certain period of time to melt the cream solder and solder the air core coil directly onto the circuit pattern of the printed circuit board, the so-called reflow method. Is used. When soldering using this reflow method, the adjacent self-bonding enamel wire of the air-core coil is fixed by the fusion-bonding film of thermoplastic resin, so the high temperature of 220-240 ℃ for several seconds If exposed for several tens of seconds, the fusion coating will be softened by heat, and the coiled wire material that is wound will come loose or fray, or the shape of the coil will be deformed, making it more reliable in terms of heat resistance and heat distortion resistance. There was a problem.

【0004】そこで上記問題点を改善するため、自己融
着性エナメル電線の融着層として、熱可塑性樹脂でも熱
軟化温度の高いアルコール可溶性ポリアミド樹脂を主成
分とする接着塗料を、導体上に絶縁皮膜を介して塗布,
焼付けた溶剤接着型の自己融着性エナメル電線を用い、
この自己融着性エナメル電線にアルコール塗布しながら
巻線し、自己融着性エナメル電線同士を固着し空芯コイ
ルを製造する方法が行なわれている。この方法により得
られた空芯コイルは、前記リフロー炉の220〜240℃の高
温に耐え、耐熱性,耐熱変形性もかなり良好なものであ
る。しかしながら、この空芯コイルは自己融着性エナメ
ル電線の融着皮膜をアルコール系溶剤で膨潤,溶解させ
て自己融着性エナメル電線同士を接着させながら巻線し
ているため、空芯コイルの内層側の自己融着性エナメル
電線の融着皮膜中にはアルコール系溶剤が十分に乾燥さ
れずに残留することが多く、空芯コイルをリフロー炉に
通した際に融着皮膜中に残留するアルコール系溶剤が気
化し、空芯コイルに膨らみを生じるという欠点があっ
た。また巻線中に、膨潤,溶解した融着皮膜カスがトラ
バス滑車に付着し、空芯コイルの巻線歩留を低下させる
という欠点もあった。
In order to solve the above problems, therefore, an adhesive coating mainly composed of an alcohol-soluble polyamide resin, which is a thermoplastic resin and has a high thermal softening temperature, is used as a fusing layer for a self-fusing enamel wire to insulate the conductor. Applied through a film,
Using a solvent-bonded self-fusing enamel wire that has been baked,
A method of manufacturing an air-core coil by winding the self-bonding enamel electric wire while applying alcohol and fixing the self-bonding enamel electric wires to each other is fixed. The air-core coil obtained by this method withstands the high temperature of 220 to 240 ° C. in the reflow furnace, and has considerably good heat resistance and heat distortion resistance. However, in this air-core coil, the fusion coating of the self-bonding enamel wire is swollen and dissolved with an alcohol solvent to wind the self-bonding enamel wire while adhering them together. Alcohol-based solvent often remains in the fusion coating of the self-bonding enamel wire on the side without being sufficiently dried, and the alcohol remaining in the fusion coating when the air-core coil is passed through the reflow furnace. There is a drawback that the system solvent is vaporized and the air core coil is bulged. In addition, there is a drawback that the swollen and melted fusion film residue adheres to the traverse pulley during winding, which reduces the winding yield of the air-core coil.

【0005】本発明は上記従来技術が有する問題点を解
決するために為されたものであり、リフロー炉の220〜2
40℃の高温に耐え、耐熱性,耐熱変形性の良好な空芯コ
イルが得られる空芯コイルの製造法を提供することを目
的とする。
The present invention was made in order to solve the problems of the above-mentioned prior art.
An object of the present invention is to provide a method for manufacturing an air-core coil that can withstand a high temperature of 40 ° C and obtain an air-core coil having excellent heat resistance and heat distortion resistance.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に本発明は、自己融着性エナメル電線をコイル巻型に巻
裝し、巻裝された自己融着性エナメル電線相互を融着固
化した後巻型から取り出して空芯コイルを得る空芯コイ
ルの製造法において、前記自己融着性エナメル電線の融
着層を熱可塑性樹脂を主成分としこれに紫外線硬化樹脂
を配合してなる接着塗料を塗布焼付けして形成し、前記
融着層を設けた自己融着性エナメル電線をコイル巻型に
巻回する工程で、前記コイル巻型に巻回中の前記自己融
着性エナメル電線に熱風を吹き付け、巻回中の前記自己
融着性エナメル電線とこれに隣接するコイル巻型に巻回
されている前記自己融着性エナメル電線相互の融着層を
軟化融着させるとともに、前記軟化融着状態にある自己
融着性エナメル電線とこれに隣接する自己融着性エナメ
ル電線とに紫外線を照射し、前記自己融着性エナメル電
線相互を接着硬化させる空芯コイルの製造法にある。
In order to achieve the above-mentioned object, the present invention is to wind a self-bonding enamel wire around a coil winding form and to fuse and solidify the wound self-bonding enamel wires together. In the method for producing an air-core coil, which is obtained by taking out from the winding die after the above, a fusion layer of the self-bonding enamel wire is composed mainly of a thermoplastic resin and an ultraviolet-curable resin is added to the fusion layer to form an adhesive layer. Formed by applying and baking paint, in the step of winding the self-bonding enamel electric wire provided with the fusion-bonding layer in a coil winding form, to the self-bonding enamel electric wire being wound around the coil winding form. Hot air is blown, and the self-bonding enamel wire being wound and the self-bonding enamel wire that is wound around the coil winding adjacent to it are softened and softened together with the softening layer. Self-fusing enamel electrode in the fused state And this was irradiated with ultraviolet rays and self-bonding enameled wire which is adjacent, in the preparation of the self-bonding enameled wire air core coil for each other adhere cured.

【0007】前記熱風の吹き付け幅が前記コイル巻型の
巻幅に形成され、また前記紫外線照射は紫外線発生装置
と該紫外線発生装置からの紫外線を誘導する光ファイバ
ーバンドルと該光ファイバーバンドルの先端に取り付け
た紫外線照射ヘッドからなる紫外線照射手段により行わ
れ、前記紫外線照射ヘッドの照射幅を前記コイル巻型の
巻幅に形成し、巻幅全体に照射するか、または前記紫外
線照射ヘッドの照射幅をビーム状に形成し、巻回される
自己融着性エナメル電線の移動に同期して前記コイル巻
型の巻幅方向に移動する空芯コイルの製造法にある。
The blowing width of the hot air is set to the winding width of the coil winding form, and the ultraviolet irradiation is attached to the ultraviolet ray generator, the optical fiber bundle for guiding the ultraviolet ray from the ultraviolet ray generator, and the tip of the optical fiber bundle. The irradiation width of the ultraviolet irradiation head is formed into the winding width of the coil winding form, and the irradiation width of the ultraviolet irradiation head is a beam shape. In the method for producing an air-core coil that moves in the winding width direction of the coil winding form in synchronism with the movement of the self-fusing enamel electric wire formed and wound.

【0008】前記熱可塑性樹脂は熱軟化温度が120〜180
℃の共重合ポリアミド樹脂であり、前記紫外線硬化樹脂
はフェノール,クレゾールノボラック型のアクリル,メ
タルアクリル酸オリゴマーである。前記熱軟化温度が12
0〜180℃の共重合ポリアミド樹脂は、分子量が30,000以
上の共重合ポリアミド樹脂であり、具体例としてはダイ
アミドN1901,ダイアミドT451(ダイセル社商
品名),プラタボンドM1276,プラタボンドM14
11(日本リルサン社商品名)等を挙げることができ
る。これら熱可塑性の共重合ポリアミド樹脂を単独で用
いた場合、融着皮膜の耐熱性が劣るため、得られた空芯
コイルは熱変形を起こしやすい。そこで本発明は、融着
皮膜の耐熱性を向上させるために共重合ポリアミド樹脂
に紫外線硬化樹脂を配合しているものである。この紫外
線硬化樹脂として用いられるフェノール,クレゾールノ
ボラック型アクリル酸オリゴマー,フェノール,クレゾ
ールノボラック型メタアクリル酸オリゴマーは、フェノ
ール,クレゾールノボラック型樹脂にアクリル酸または
メタアクリル酸を附加させた固型の多官能性架橋剤であ
り、化学式1で示される。
The thermoplastic resin has a heat softening temperature of 120 to 180.
It is a copolyamide resin at ℃, and the ultraviolet curable resin is a phenol, cresol novolac type acrylic or metal acrylic acid oligomer. The heat softening temperature is 12
The copolyamide resin of 0 to 180 ° C. is a copolyamide resin having a molecular weight of 30,000 or more, and specific examples thereof include Daiamide N1901, Daiamide T451 (trade name of Daicel Corporation), Platabond M1276, Platabond M14.
11 (trade name of Nippon Rilsan Co., Ltd.) and the like. When these thermoplastic copolyamide resins are used alone, the heat resistance of the fusion coating is inferior, and thus the obtained air-core coil is likely to undergo thermal deformation. Therefore, in the present invention, an ultraviolet curable resin is blended with the copolyamide resin in order to improve the heat resistance of the fusion coating. Phenol, cresol novolac type acrylic acid oligomer, phenol, cresol novolac type methacrylic acid oligomer used as this ultraviolet curing resin is a solid polyfunctional compound obtained by adding acrylic acid or methacrylic acid to phenol, cresol novolac type resin. It is a cross-linking agent and is represented by Chemical Formula 1.

【0009】[0009]

【化1】 Embedded image

【0010】具体例としてはクレゾールノボラック型ア
クリル酸オリゴマーEA−7520(新中村化学社商品
名)等を挙げることができる。また前記共重合ポリアミ
ド樹脂の熱軟化温度を120〜180℃に限定した理由は、熱
軟化温度が180℃を越えた共重合ポリアミド樹脂から成
る融着層は自己融着性エナメル電線間の接着を強固に行
うためには非常に高温に加熱された熱風を使用する必要
があり、この様な熱風を吹き付けた場合にはコイル巻線
治具の回転部分の劣化が極端にひどくなるためであり、
また熱軟化温度が120℃未満の共重合ポリアミド樹脂
は、該樹脂に紫外線硬化樹脂を配合しても耐熱性の向上
がみられないためである。
Specific examples include cresol novolac type acrylic acid oligomer EA-7520 (trade name of Shin-Nakamura Chemical Co., Ltd.). The reason for limiting the thermal softening temperature of the copolyamide resin to 120 to 180 ° C is that the fusion layer made of the copolyamide resin having a thermal softening temperature of more than 180 ° C prevents adhesion between self-adhesive enamel wires. This is because it is necessary to use hot air heated to a very high temperature in order to perform firmly, and when such hot air is blown, the deterioration of the rotating part of the coil winding jig becomes extremely severe,
Further, in the case of the copolyamide resin having a heat softening temperature of less than 120 ° C., the heat resistance is not improved even if an ultraviolet curable resin is added to the resin.

【0011】[0011]

【作用】本発明の自己融着性エナメル電線は、熱軟化温
度が120〜180℃の共重合ポリアミド樹脂を主成分とし、
これにフェノール,クレゾールノボラック型のアクリ
ル,メタアクリル酸オリゴマーを配合してなる接着塗料
を、導体上に絶縁皮膜を介して塗布,焼付けたものであ
る。融着層は前記共重合ポリアミド樹脂と前記オリゴマ
ーからなり、オリゴマー中のアクリル酸,メタアクリル
酸の二重結合は焼付け後も未反応の形で融着皮膜中に残
存されている。
The self-fusing enamel wire of the present invention contains a copolyamide resin having a heat softening temperature of 120 to 180 ° C. as a main component,
Adhesive paint prepared by blending phenol, cresol novolac type acrylic, and methacrylic acid oligomer is applied and baked on the conductor through an insulating film. The fusing layer is composed of the copolyamide resin and the oligomer, and the double bond of acrylic acid and methacrylic acid in the oligomer remains in the fusing film in an unreacted form even after baking.

【0012】上記のかかる融着層を設けた自己融着性エ
ナメル電線を用い、これをコイル巻型に巻回する工程
で、前記コイル巻型に巻回中の前記自己融着性エナメル
電線に熱風を吹き付けることにより、巻回中の前記自己
融着性エナメル電線とこれに隣接するコイル巻型に巻回
されている前記自己融着性エナメル電線相互の融着層は
軟化融着され、更にこの軟化融着状態にある自己融着性
エナメル電線と隣接自己融着性エナメル電線とに紫外線
を照射することにより、融着皮膜中のオリゴマー中に残
存する未反応のアクリル酸,メタアクリル酸の二重結合
が紫外線のエネルギーで励起されて二重結合が開き、分
子間架橋する。このとき分子間架橋されるオリゴマーは
共重合ポリアミド樹脂の分子の分子鎖にからまって架橋
されるため、一様な分子相互進入型(IPN)構造を形
成して融着皮膜に耐熱性が付与され、自己融着性エナメ
ル電線相互が接着硬化される。従って、得られた空芯コ
イルは耐熱性,耐熱変形性が良好となる。
In the step of winding the self-bonding enamel electric wire provided with the above-mentioned fusion-bonding layer and winding the same on the coil winding form, the self-bonding enamel electric wire being wound around the coil winding form is used. By blowing hot air, the self-bonding enamel electric wire during winding and the self-bonding enamel electric wire, which is wound around a coil winding adjacent to the self-bonding enamel wire, is softened and fused, and By irradiating the self-bonding enamel wire and the adjacent self-bonding enamel wire in the softened and fused state with ultraviolet rays, unreacted acrylic acid and methacrylic acid remaining in the oligomer in the fusion-bonded film The double bond is excited by the energy of ultraviolet rays to open the double bond, resulting in intermolecular crosslinking. At this time, the intermolecularly cross-linked oligomer is cross-linked by being entangled with the molecular chains of the molecules of the copolyamide resin, thus forming a uniform intermolecular interpenetrating (IPN) structure and imparting heat resistance to the fusion coating. Then, the self-bonding enamel electric wires are adhesively cured. Therefore, the obtained air-core coil has good heat resistance and heat deformation resistance.

【0013】[0013]

【実施例】本発明の空芯コイルの製造法につき実施例を
挙げて説明する。なお本発明は本実施例に限定されるも
のではない。
EXAMPLES The method for producing the air-core coil of the present invention will be described with reference to examples. The present invention is not limited to this embodiment.

【0014】(1)接着塗料の調製 表1は本発明の実施例1,2,3及び比較例の接着塗料
の配合組成表であり、この配合組成表に基づいて攪拌
機,温度計付きの四ツ口フラスコに共重合ポリアミド樹
脂,クレゾールノボラック型アクリル酸オリゴマー,滑
剤及びこれらを溶解するための溶剤を入れ、80〜100℃
の温度に加温し、これらの樹脂が完全に溶解するまで攪
拌して濃度20%の接着塗料を調製した。なお滑剤は空芯
コイル製造の際に型離れを良くするために添加したもの
である。
(1) Preparation of Adhesive Coatings Table 1 is a composition table of the adhesive coatings of Examples 1, 2, 3 and Comparative Example of the present invention. Copolymerized polyamide resin, cresol novolac type acrylic acid oligomer, lubricant and solvent for dissolving them are put in a two-necked flask, and the temperature is 80 to 100 ° C.
A 20% strength adhesive coating was prepared by warming the mixture to a temperature of 1 and stirring until the resins were completely dissolved. The lubricant is added in order to improve the mold release at the time of manufacturing the air core coil.

【0015】[0015]

【表1】 [Table 1]

【0016】(2)自己融着性エナメル電線の製造 前記(1)で調製された実施例3点、比較例1点、計4
点の接着塗料を導体径0.3mm,仕上外径0.310mmのポリウ
レタン銅線の外周上にダイスを用いて塗布し、焼付炉中
を通して焼付けることにより自己融着性エナメル銅線を
製造した。この時の製造条件は炉長2.5m(横式熱風循環
炉),炉温300℃,線速40m/minである。得られた自己
融着性エナメル銅線の特性を表2に示す。
(2) Manufacture of self-bonding enamel electric wire: 3 points of the example prepared in (1) above, 1 point of the comparative example, a total of 4 points.
A self-bonding enamel copper wire was manufactured by applying the adhesive paint at the spot on the outer circumference of a polyurethane copper wire having a conductor diameter of 0.3 mm and a finishing outer diameter of 0.310 mm using a die and baking through a baking oven. The manufacturing conditions at this time were a furnace length of 2.5 m (horizontal hot air circulation furnace), furnace temperature of 300 ° C, and linear velocity of 40 m / min. The characteristics of the obtained self-bonding enamel copper wire are shown in Table 2.

【0017】[0017]

【表2】 [Table 2]

【0018】表2からわかるように、熱可塑性樹脂を主
成分とし、これに紫外線硬化樹脂を配合してなる接着塗
料を用いて製造された実施例1,2及び3の自己融着性
エナメル銅線は紫外線硬化樹脂の影響が殆どなく特性が
良好であった。表面摩擦係数が若干低下しているがコイ
ルの特性に何等影響を与えなかった。なお、自己融着性
エナメル銅線の試験方法はJIS C 3003 エナメル銅線試
験方法に準拠している。
As can be seen from Table 2, the self-fusing enamel copper of Examples 1, 2 and 3 produced by using an adhesive coating composition containing a thermoplastic resin as a main component and an ultraviolet curable resin mixed therein. The line was not affected by the ultraviolet curable resin and had good characteristics. The surface friction coefficient was slightly reduced, but it did not affect the coil characteristics. The test method for the self-bonding enamel copper wire complies with JIS C 3003 enamel copper wire test method.

【0019】(3)空芯コイルの製造 前記(2)により製造された自己融着性エナメル銅線を
用いた空芯コイルの製造法について図を用いて説明す
る。図1は本発明の空芯コイルの製造法の熱風の吹き付
け及び紫外線照射の概要を示す略図である。また図2は
紫外線照射ヘッドの照射幅がビーム状に形成された紫外
線照射の概要を示す略図である。
(3) Manufacture of air-core coil A method of manufacturing an air-core coil using the self-bonding enamel copper wire manufactured in (2) above will be described with reference to the drawings. FIG. 1 is a schematic view showing the outline of blowing hot air and irradiating ultraviolet rays in the method for manufacturing an air-core coil of the present invention. Further, FIG. 2 is a schematic diagram showing an outline of ultraviolet irradiation in which the irradiation width of the ultraviolet irradiation head is formed in a beam shape.

【0020】巻線機(図示せず)の回転軸1にコイル巻
型2を取り付ける。このコイル巻型2に自己融着性エナ
メル銅線3を巻回する際、前記コイル巻型2の斜め上方
約50mmに設けた熱風吹出しノズル4から190℃の熱風を
コイル巻型2の巻幅方向の全体にわたって吹き付けて巻
回中の前記自己融着性エナメル銅線3とこれに隣接する
コイル巻型2に巻回されている前記自己融着性エナメル
銅線3相互の融着層を軟化融着状態とさせ、同時に更に
前記軟化融着状態にある自己融着性エナメル銅線3とこ
れに隣接する自己融着性エナメル銅線3とに、紫外線発
生装置5より口径5mmφの光ファイバーバンドル6によ
り誘導した紫外線を、紫外線照射ヘッド7より空芯コイ
ル巻回面より50mmの距離からコイル巻型2の巻幅全体に
わたって照射し、前記自己融着性エナメル銅線3相互を
接着硬化させた後コイル巻型2から取り出して空芯コイ
ル9を製造した。なお紫外線照射は、図2に示すように
紫外線照射ヘッド7の照射幅をビーム状に形成し、巻回
される自己融着性エナメル電線3の移動に同期させて前
記コイル巻型2の巻幅方向に移動させても良い。なお、
紫外線が照射されない個所の融着皮膜は硬化しないが、
照射された個所の融着皮膜が硬化することにより耐熱
性,耐熱変形性が良好となることが確認されている。
A coil winding form 2 is attached to a rotary shaft 1 of a winding machine (not shown). When the self-bonding enamel copper wire 3 is wound around the coil winding form 2, hot air of 190 ° C. is blown from the hot air blowing nozzle 4 provided obliquely above the coil winding form 2 by about 50 mm. The self-fusing enamel copper wire 3 being blown and wound in the entire direction and the self-fusing enamel copper wire 3 wound around the coil winding 2 adjacent thereto is softened. An optical fiber bundle 6 having a diameter of 5 mm from an ultraviolet ray generating device 5 is attached to the self-bonding enameled copper wire 3 and the adjacent self-bondable enameled copper wire 3 which are in the softened and fused state at the same time in the fused state. After irradiating the ultraviolet rays induced by the UV irradiation head 7 over the entire winding width of the coil former 2 from a distance of 50 mm from the air-core coil winding surface, the self-bonding enamel copper wires 3 are bonded and cured. Take out from coil former 2 To produce an air core coil 9. The ultraviolet irradiation is performed by forming the irradiation width of the ultraviolet irradiation head 7 into a beam shape as shown in FIG. 2 and synchronizing the movement of the wound self-bonding enamel wire 3 with the winding width of the coil winding form 2. You may move in the direction. In addition,
The fusion coating on the part that is not irradiated with ultraviolet rays does not cure,
It has been confirmed that the heat resistance and heat distortion resistance are improved by hardening the fusion coating at the irradiated part.

【0021】前記空芯コイル9の形状は三角形状で長径
30mm,巻幅(コイル厚さ)2.20mm,巻ターン数143とし
た。また巻線条件は、回転数800rpm/min,巻線張力400
g,巻線時間30秒で行なった。また紫外線発生装置5は
オーク製作所製HMW−623型の紫外線照射装置を用
い、照射電流を4Aとし、波長365nm,エネルギー密度1
90mW/cm2,の紫外線を照射した。
The air core coil 9 has a triangular shape and a long diameter.
30mm, winding width (coil thickness) 2.20mm, number of winding turns 143. The winding conditions are as follows: rotation speed 800 rpm / min, winding tension 400
g, winding time was 30 seconds. The ultraviolet ray generator 5 is an HMW-623 type ultraviolet ray irradiator manufactured by Oak Manufacturing Co., Ltd., the irradiation current is 4 A, the wavelength is 365 nm, and the energy density is 1
It was irradiated with 90 mW / cm 2 of ultraviolet rays.

【0022】(4)空芯コイルの耐熱,変形試験 前記(3)により製造した空芯コイルについて、加熱時
の耐熱性及び耐熱変形性をみるために耐熱,変形試験を
行なった。その結果を表3に示す。
(4) Heat Resistance and Deformation Test of Air Core Coil The air core coil manufactured according to the above (3) was subjected to a heat resistance and deformation test in order to check the heat resistance and the heat distortion resistance during heating. Table 3 shows the results.

【0023】[0023]

【表3】 [Table 3]

【0024】上記の空芯コイルの耐熱,変形試験は、上
記各温度に保持した恒温槽に各空芯コイル(n=3)を
30分間放置してから取り出し、ばらけやほつれ及びコイ
ルの熱変形について試験したものである。表3からわか
るように実施例の空芯コイルは実施例1の140 °Cに於
いて一部端末ほつれがあるものの、その他は耐熱性及び
耐熱変形性が良好だった。なおこの耐熱,変形試験は、
実際のリフロー工程の条件と関連させて決定したもの
で、130℃×30分間に耐えるものは実際のリフロー炉に
何等問題のないことを確認している。
In the heat resistance and deformation test of the above air core coil, each air core coil (n = 3) was placed in a constant temperature bath maintained at the above temperature.
It was left for 30 minutes, taken out, and tested for loosening, fraying, and thermal deformation of the coil. As can be seen from Table 3, the air-core coil of the example had some end frays at 140 ° C of the example 1, but the others had good heat resistance and heat distortion resistance. This heat resistance and deformation test
It was determined in relation to the conditions of the actual reflow process, and it has been confirmed that there is no problem in the actual reflow furnace if it withstands 130 ° C x 30 minutes.

【0025】[0025]

【発明の効果】本発明の空芯コイルの製造法により得ら
れた空芯コイルは耐熱性,耐熱変形性に優れ、220〜240
℃の高温にさらされるリフローはんだ工程に使用した場
合であっても空芯コイルにばらけやほつれ或はコイルの
熱変形等を生じることがなくなった。また本発明の空芯
コイルの製造法は、従来の熱風接着型の巻線機に紫外線
照射手段を単に付加するのみであるので、高価な巻線機
を新たに設備することなく容易に実施することができ
る。
The air-core coil obtained by the method for producing an air-core coil of the present invention has excellent heat resistance and heat deformation resistance, and is 220 to 240
Even when used in a reflow soldering process that is exposed to a high temperature of ℃, the air-core coil is free from loosening, fraying, or thermal deformation of the coil. Further, since the air core coil manufacturing method of the present invention simply adds the ultraviolet irradiation means to the conventional hot air bonding type winding machine, it can be easily carried out without newly installing an expensive winding machine. be able to.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の空芯コイルの製造法の熱風の吹き付
け及び紫外線照射の概要を示す略図である。
FIG. 1 is a schematic diagram showing an outline of blowing hot air and irradiating ultraviolet rays in a method for manufacturing an air-core coil of the present invention.

【図2】 紫外線照射ヘッドの照射幅がビーム状に形成
された紫外線照射の概要を示す略図である。
FIG. 2 is a schematic view showing an outline of ultraviolet irradiation in which the irradiation width of the ultraviolet irradiation head is formed into a beam shape.

【符号の説明】[Explanation of symbols]

1 回転軸 2 コイル巻型 3 自己融着性エナメル電線 4 熱風吹出しノズル 5 紫外線発生装置 6 光ファイバーバンドル 7 紫外線照射ヘッド 8 紫外線照射手段 9 空芯コイル DESCRIPTION OF SYMBOLS 1 rotating shaft 2 coil winding type 3 self-bonding enamel electric wire 4 hot air blowing nozzle 5 ultraviolet ray generator 6 optical fiber bundle 7 ultraviolet ray irradiation head 8 ultraviolet ray irradiation means 9 air core coil

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 自己融着性エナメル電線をコイル巻型に
巻裝し、巻裝された自己融着性エナメル電線相互を融着
固化した後巻型から取り出して空芯コイルを得る空芯コ
イルの製造法において、前記自己融着性エナメル電線の
融着層を熱可塑性樹脂を主成分としこれに紫外線硬化樹
脂を配合してなる接着塗料を塗布焼付けして形成し、前
記融着層を設けた自己融着性エナメル電線をコイル巻型
に巻回する工程で、前記コイル巻型に巻回中の前記自己
融着性エナメル電線に熱風を吹き付け、巻回中の前記自
己融着性エナメル電線とこれに隣接するコイル巻型に巻
回されている前記自己融着性エナメル電線相互の融着層
を軟化融着させるとともに、前記軟化融着状態にある自
己融着性エナメル電線とこれに隣接する自己融着性エナ
メル電線とに紫外線を照射し、前記自己融着性エナメル
電線相互を接着硬化させることを特徴とする空芯コイル
の製造法。
1. An air-core coil for obtaining an air-core coil by winding a self-bonding enamel electric wire around a coil winding form, melting and winding the wound self-bonding enamel electric wires together and then taking them out from the winding form. In the manufacturing method, the fusion-bonding layer of the self-bonding enamel wire is formed by applying and baking an adhesive coating comprising a thermoplastic resin as a main component and an ultraviolet-curing resin mixed therein, and providing the fusion-bonding layer. In the step of winding the self-bonding enamel electric wire around the coil winding form, hot air is blown to the self-bonding enamel electric wire being wound around the coil winding form, and the self-bonding enamel electric wire during winding. And adjacent to the self-bonding enamel wire in the softened and fused state, as well as softening and fusing the fusing layer of the self-bonding enamel wire that is wound around the coil winding form adjacent thereto. Self-fusing enamel wire and UV And a method of manufacturing an air-core coil, wherein the self-fusing enamel electric wires are adhered and cured.
【請求項2】 前記熱風の吹き付け幅が前記コイル巻型
の巻幅に形成されていることを特徴とする請求項1記載
の空芯コイルの製造法。
2. The method for manufacturing an air-core coil according to claim 1, wherein the blowing width of the hot air is formed to be the winding width of the coil winding form.
【請求項3】 前記紫外線照射は紫外線発生装置と該紫
外線発生装置からの紫外線を誘導する光ファイバーバン
ドルと該光ファイバーバンドルの先端に取り付けた紫外
線照射ヘッドからなる紫外線照射手段により行われるこ
とを特徴とする請求項1又は2記載の空芯コイルの製造
法。
3. The ultraviolet ray irradiation is performed by an ultraviolet ray irradiation means including an ultraviolet ray generator, an optical fiber bundle for guiding the ultraviolet ray from the ultraviolet ray generator, and an ultraviolet ray irradiation head attached to the tip of the optical fiber bundle. The method for manufacturing the air-core coil according to claim 1.
【請求項4】 前記紫外線照射ヘッドの照射幅が前記コ
イル巻型の巻幅に形成されていることを特徴とする請求
項1、2又は3記載の空芯コイルの製造法。
4. The method for producing an air-core coil according to claim 1, wherein the irradiation width of the ultraviolet irradiation head is formed to be the winding width of the coil winding die.
【請求項5】 前記紫外線照射ヘッドの照射幅がビーム
状に形成され、巻回される自己融着性エナメル電線の移
動に同期して前記コイル巻型の巻幅方向に移動すること
を特徴とする請求項1、2又は3記載の空芯コイルの製
造法。
5. The irradiation width of the ultraviolet irradiation head is formed into a beam shape, and the ultraviolet irradiation head moves in the winding width direction of the coil winding form in synchronization with the movement of the self-bonding enamel electric wire to be wound. The method for producing an air-core coil according to claim 1, 2, or 3.
【請求項6】 前記熱可塑性樹脂は熱軟化温度が120〜1
80℃の共重合ポリアミド樹脂であり、前記紫外線硬化樹
脂はフェノール,クレゾールノボラック型のアクリル,
メタルアクリル酸オリゴマーであることを特徴とする請
求項1、2、3、4又は5記載の空芯コイルの製造法。
6. The thermoplastic resin has a thermal softening temperature of 120 to 1
It is a copolyamide resin at 80 ° C., and the UV curable resin is phenol, cresol novolac type acrylic resin,
The method for producing an air-core coil according to claim 1, wherein the metal-acrylic acid oligomer is used.
JP3347799A 1991-12-03 1991-12-03 Air core coil manufacturing method Expired - Lifetime JP2542304B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3347799A JP2542304B2 (en) 1991-12-03 1991-12-03 Air core coil manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3347799A JP2542304B2 (en) 1991-12-03 1991-12-03 Air core coil manufacturing method

Publications (2)

Publication Number Publication Date
JPH0696977A JPH0696977A (en) 1994-04-08
JP2542304B2 true JP2542304B2 (en) 1996-10-09

Family

ID=18392663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3347799A Expired - Lifetime JP2542304B2 (en) 1991-12-03 1991-12-03 Air core coil manufacturing method

Country Status (1)

Country Link
JP (1) JP2542304B2 (en)

Also Published As

Publication number Publication date
JPH0696977A (en) 1994-04-08

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