JPS6316889B2 - - Google Patents
Info
- Publication number
- JPS6316889B2 JPS6316889B2 JP56137262A JP13726281A JPS6316889B2 JP S6316889 B2 JPS6316889 B2 JP S6316889B2 JP 56137262 A JP56137262 A JP 56137262A JP 13726281 A JP13726281 A JP 13726281A JP S6316889 B2 JPS6316889 B2 JP S6316889B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating sheet
- thermosetting resin
- semi
- heat
- cured
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
Description
【発明の詳細な説明】
本発明はコイルの製造方法に関し、特に変圧器
コイルの製造に有用なものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a coil, and is particularly useful for manufacturing a transformer coil.
変圧器コイルにおいては、コイル内外面には高
い電気ストレスが作用するから、信頼性のある高
性能の絶縁を被すことが必要である。 In a transformer coil, high electrical stress acts on the inner and outer surfaces of the coil, so it is necessary to cover it with reliable, high-performance insulation.
このため本発明者等は、少なくとも片面に半硬
化の熱硬化性樹脂層を設けた絶縁シートＡを半硬
化熱硬化性樹脂層を外面として芯金上に巻回し、
その上にコイル本体を巻成し、このコイル本体上
に、熱収縮性繊維基材に半硬化状態で熱硬化性樹
脂を含浸した絶縁シートＢを巻回し、次いで、加
熱により上記絶縁シートＡの巻回層並びに絶縁シ
ートＢの巻回層のそれぞれの半硬化状態の熱硬化
性樹脂を完全に硬化させることを考案した。 For this reason, the present inventors wound an insulating sheet A, which has a semi-cured thermosetting resin layer on at least one side, onto a core metal with the semi-cured thermosetting resin layer as the outer surface.
A coil body is wound thereon, and an insulating sheet B, which is a heat-shrinkable fiber base material impregnated with a thermosetting resin in a semi-cured state, is wound on the coil body, and then the insulating sheet A is heated. It was devised to completely cure the semi-cured thermosetting resin of the wound layer and the wound layer of the insulating sheet B.
この方法によれば、加熱の際、絶縁シートＢが
熱収縮し、絶縁シートＢの巻回層とコイル本体の
界面、絶縁シートＡの巻回層とコイル本体との界
面に、上記絶縁シートＢの熱収縮力の応力として
の圧力が発生する。而して、絶縁シートＡ並びに
絶縁シートＢの半硬化状態の熱硬化性樹脂が完全
硬化の前段階として一たん溶融状態になるとき
に、この溶融状態と上記圧力のために、絶縁シー
トＡの巻回層とコイル本体との間のボイドのない
密着性並びに絶縁シートＢの巻回層とコイル本体
との間のボイドのない密着性がそれぞれ、よく保
障され、コイル本体の内外面に信頼性のある高性
能の絶縁層を設けることができる。 According to this method, during heating, the insulating sheet B thermally shrinks, and the insulating sheet B Pressure is generated as stress due to the thermal contraction force. When the semi-cured thermosetting resins of insulating sheet A and insulating sheet B temporarily become molten as a step before complete curing, the molten state and the above pressure cause the insulating sheet A to melt. The void-free adhesion between the winding layer and the coil body as well as the void-free adhesion between the winding layer of the insulating sheet B and the coil body are well guaranteed, ensuring reliability on the inner and outer surfaces of the coil body. A high performance insulating layer can be provided.
上記の絶縁処理法は、いわゆる、公知のプリプ
レグによる絶縁処理に対し、上記熱収縮性繊維基
材の熱収縮力利用による絶縁層の完全なボイドレ
ス化の改良を意図したものであつて、従来のプリ
プレグ絶縁処理よりも、秀れた信頼性、高性能が
期待できる。 The above-mentioned insulation treatment method is intended to improve the so-called insulation treatment using the known prepreg by making the insulation layer completely void-free by utilizing the heat shrinkage force of the heat-shrinkable fiber base material. Superior reliability and performance can be expected compared to prepreg insulation treatment.
しかしながら、上記の改良された絶縁処理方法
においては、上記半硬化状態の熱硬化性樹脂が完
全硬化する間に発生する硬化収縮に対し、芯金が
その硬化収縮を吸収し得ない不動体の状態である
から、硬化収縮のために異常な応力が発生し、熱
硬化性樹脂層に異常が生じたり、芯金の抜取りが
著しく困難になるといつた問題がある。 However, in the above-mentioned improved insulation treatment method, the core metal is in an immovable state where it cannot absorb the curing shrinkage that occurs while the thermosetting resin in the semi-cured state is completely cured. Therefore, there are problems in that abnormal stress is generated due to curing shrinkage, causing abnormalities in the thermosetting resin layer and making it extremely difficult to remove the core bar.
本発明に係るコイル製造方法は、かゝる不具合
を解消するために発明された方法であり、少なく
とも片面に半硬化状態の熱硬化性樹脂層を設けた
絶縁シートＡを半硬化熱硬化性樹脂層を外面とし
て芯金上に巻回し、その上に、コイル本体を設
け、その上に、熱収縮性繊維基材に半硬化状態で
熱硬化性樹脂を含浸した絶縁シートＢを巻回し、
次いで、前段階加熱により、上記半硬化状態の熱
硬化性樹脂を溶融させると共に絶縁シートＢの巻
回層を完全に熱収縮させ、その熱収縮力により、
絶縁シートＡの熱硬化性樹脂とコイル本体並びに
絶縁シートＢの熱硬化性樹脂とコイル本体とを加
圧接着させ、而るのち芯金を抜き取り、後段階の
加熱により、上記両絶縁シートＡ，Ｂの熱硬化性
樹脂の硬化を完了させ、樹脂の硬化収縮は後段階
加熱で生じさせることを特徴とする方法である。 The coil manufacturing method according to the present invention is a method invented to eliminate such problems, and in which an insulating sheet A having a semi-cured thermosetting resin layer on at least one side is coated with a semi-cured thermosetting resin. The layer is wound on a core metal as the outer surface, a coil body is provided on it, and an insulating sheet B, which is a heat-shrinkable fiber base material impregnated with a thermosetting resin in a semi-cured state, is wound thereon,
Next, by pre-heating, the semi-cured thermosetting resin is melted and the wound layer of the insulating sheet B is completely heat-shrinked, and the heat shrinkage force causes
The thermosetting resin of the insulating sheet A and the coil body as well as the thermosetting resin of the insulating sheet B and the coil body are bonded together under pressure, and then the core metal is removed, and by heating in a later stage, both the above-mentioned insulating sheets A, This method is characterized in that the curing of the thermosetting resin B is completed, and curing shrinkage of the resin is caused by post-stage heating.
上記絶縁シートＡには、熱硬化樹脂含浸繊維基
材の片面又は両面に半硬化のエポキシ樹脂層を設
けたものが使用され、繊維基材には、例えばガラ
ス織布又は不織布、芳香族ポリアミド織布又は不
織布、ポリエステル織布又は不織布、アラミツド
紙、アスベスト紙等を使用でき、熱硬化含浸樹脂
には、ポリイミド、ポリアミド、ポリオキシジア
ゾール、芳香族ポリアミド、シリコーン、エポキ
シ樹脂、ポリエステル樹脂等を使用できる。 The above-mentioned insulating sheet A is made of a thermosetting resin-impregnated fiber base material with a semi-cured epoxy resin layer on one or both sides. Cloth or non-woven fabric, polyester woven fabric or non-woven fabric, aramid paper, asbestos paper, etc. can be used, and thermosetting impregnated resins such as polyimide, polyamide, polyoxydiazole, aromatic polyamide, silicone, epoxy resin, polyester resin, etc. can be used. can.
コイル本体を構成する金属箔には、アルミ箔、
銅箔等を使用でき、絶縁フイルムにはポリイミド
フイルム、ポリエステルフイルム、芳香族のポリ
アミド紙を使用できる。この絶縁フイルム又は金
属箔には、プリプレグ層（半硬化状態の熱硬化性
樹脂層）を設けることもできる。 The metal foil that makes up the coil body includes aluminum foil,
Copper foil or the like can be used, and the insulating film can be polyimide film, polyester film, or aromatic polyamide paper. A prepreg layer (semi-hardened thermosetting resin layer) can also be provided on this insulating film or metal foil.
上記絶縁シートＢの熱収縮性繊維基材には、タ
テ糸に熱収縮性のポリエステル繊維（熱収縮率５
〜15％）を、ヨコ糸にガラス繊維をそれぞれ使用
した交織布を用いることができる。 The heat-shrinkable fiber base material of the insulation sheet B has heat-shrinkable polyester fibers (heat shrinkage rate: 5
~15%), and a mixed woven fabric using glass fiber for the weft can be used.
以下、本発明を説明する。 The present invention will be explained below.
本発明を実施するには、まず表面に離型剤を塗
布した芯金上に上記絶縁シートＡを半硬化熱硬化
性樹脂層を外面として所定の絶縁厚さで巻回す
る。この場合、絶縁シートに、両面に半硬化熱硬
化性樹脂層を設けたものを使用することもでき
る。 To carry out the present invention, first, the above-mentioned insulating sheet A is wound to a predetermined insulation thickness on a core bar whose surface is coated with a mold release agent, with the semi-cured thermosetting resin layer as the outer surface. In this case, it is also possible to use an insulating sheet provided with semi-cured thermosetting resin layers on both sides.
絶縁シートＡを巻回したのちは、その上に、金
属箔と絶縁フイルムを共巻きしてコイル本体を巻
成し、このコイル本体上に絶縁シートＢを所定の
絶縁厚さで巻回する。 After the insulating sheet A is wound, a metal foil and an insulating film are co-wound thereon to form a coil body, and an insulating sheet B is wound on the coil body to a predetermined insulation thickness.
次いで、上記のようにして得たコイル体を、絶
縁シートＡ並びに絶縁シートＢの半硬化熱硬化性
樹脂が溶融し、かつ絶縁シートＢの熱収縮性繊維
基材が熱収縮する温度で、所定時間、前段階加熱
する。この前段階加熱により絶縁シートＢの熱収
縮性繊維基材が熱収縮し、絶縁シートＡ並びに絶
縁シートＢのそれぞれの半硬化状態の熱硬化性樹
脂層が一時的に熱溶融状態となり、この時期に、
上記熱収縮力のために、絶縁シートＡの巻回層と
コイル本体との間、絶縁シートＢの巻回層とコイ
ル本体との間がボイドレスの状態で加圧接着され
る。 Next, the coil body obtained as described above is heated to a predetermined temperature at which the semi-cured thermosetting resins of insulating sheets A and B are melted and the heat-shrinkable fiber base material of insulating sheet B is heat-shrinked. pre-heat for an hour. Due to this preliminary heating, the heat-shrinkable fiber base material of insulation sheet B is thermally shrunk, and the semi-hardened thermosetting resin layers of insulation sheet A and insulation sheet B are temporarily in a thermally molten state. To,
Due to the heat shrinkage force, the wound layer of the insulating sheet A and the coil body are bonded together under pressure in a void-free state, and the wound layer of the insulating sheet B and the coil body are bonded together under pressure.
この前段階加熱の後は、芯金を抜き取り、而る
のち、コイル本体を加熱して、絶縁シートＡの巻
回層並びに絶縁シートＢの巻回層のそれぞれの半
硬化樹脂を完全に硬化させる。この硬化時に硬化
収縮が生じるが、この段階では、既に芯金が抜き
取られているから、その硬化収縮に伴う応力発生
は実質上なく、芯金の抜き取りを困難にしたり、
硬化樹脂層に異常が発生する不利を回避できる。 After this preliminary heating, the core metal is removed, and then the coil body is heated to completely cure the semi-cured resin of each of the wound layers of insulating sheet A and the wound layer of insulating sheet B. . Curing shrinkage occurs during this curing process, but since the core metal has already been removed at this stage, there is virtually no stress generated due to the curing shrinkage, making it difficult to remove the core metal.
The disadvantage of abnormalities occurring in the cured resin layer can be avoided.
上記の硬化完後は、コイル本体を所定の寸法に
環切りし、これにてコイルの製作が完了する。 After the above-mentioned curing is completed, the coil body is cut into rings to a predetermined size, thereby completing the production of the coil.
実施例
絶縁シート Ａ
Ｆ種耐熱性ワニスを含浸後完全硬化したポリエ
ステル不織布（厚み0.4mm）の両面に、エポキシ
ワニス（東芝ケミカル社製、TVB2024）を塗布
し、これを130℃×10分の加熱で半硬化状態とし
たものを使用。仕上り厚みは0.5mmである。Example Insulating Sheet A Epoxy varnish (manufactured by Toshiba Chemical Corporation, TVB2024) was applied to both sides of a polyester nonwoven fabric (thickness 0.4 mm) that had been completely cured after being impregnated with F-class heat-resistant varnish, and heated at 130°C for 10 minutes. Used in a semi-hardened state. The finished thickness is 0.5mm.
絶縁シート Ｂ
熱収縮性ポリエステル繊維（帝人社製、BH−
250単子）をタテ糸とし、ガラス繊維（日本ガラ
ス繊維社製、ECG−75，１／０・１：0Z）をヨ
コ糸とし、タテ糸密度40本／25mm、ヨコ糸密度35
本／25mmにて交織したポリエステル、ガラス交織
布にエポキシ樹脂液〔ダウケミカル社製エポキシ
樹脂（商品名DEN−438）：60重量部、シエル化
学社製エポキシ樹脂（商品名EP−1001）：40重量
部、BF3−モノエチルアミド錯体：３重量部をメ
チルエチルケトン，トルオール１：１の混液に50
（％）重量比にて溶解〕を含浸し、これを80℃×
30分の加熱で半硬化状態としたものを使用。仕上
り厚みは0.25mmである。Insulation sheet B Heat-shrinkable polyester fiber (manufactured by Teijin, BH-
250 singleton) as the warp yarn, glass fiber (manufactured by Nippon Glass Fiber Co., Ltd., ECG-75, 1/0, 1:0Z) as the weft yarn, warp yarn density 40 pieces/25 mm, weft yarn density 35
Book/25mm polyester and glass mixed woven fabric with epoxy resin solution [Dow Chemical Co. epoxy resin (product name DEN-438): 60 parts by weight, Ciel Chemical Co. epoxy resin (product name EP-1001): 40 Part by weight, 3 parts by weight of BF 3 -monoethylamide complex was added to a 1:1 mixture of methyl ethyl ketone and toluene.
(%) by weight ratio] and then soaked at 80℃×
Use a material that has been semi-hardened by heating for 30 minutes. The finished thickness is 0.25mm.
巾900mmの上記絶縁シートＡを、表面にシリコ
ーングリスを焼付けた外径300mmφ、長さ1000mm
の鉄製芯金上に２回巻回し、その上にポリエステ
ルフイルム（厚み：0.05mm）とアルミ箔（厚み：
0.5mm）とを20回重ね巻きし、その上に、巾50mm
の上記絶縁シートＢをハーフラツプにて４回巻回
した。次いで、このコイル体を加熱炉で130℃×
５時間の条件で前段階加熱し、常温まで放冷し、
芯金を抜き取り、再度、加熱炉で130℃×10時間
の条件で後段階加熱した。 The above insulating sheet A with a width of 900 mm is coated with silicone grease on the surface and has an outer diameter of 300 mmφ and a length of 1000 mm.
It is wound twice on a steel core, and on top of that is a polyester film (thickness: 0.05mm) and aluminum foil (thickness:
0.5mm) 20 times, and then wrap a 50mm wide
The above insulating sheet B was wound four times in a half-lap. Next, this coil body is heated in a heating furnace at 130℃
Pre-heated for 5 hours, left to cool to room temperature,
The core metal was removed and heated again in a heating furnace at 130° C. for 10 hours.
上記前段階加熱後での芯金の抜き取りは容易で
あり、後段階加熱後での絶縁シートＡの巻回層並
びに絶縁シートＢの巻回層とも、ボイドレスであ
つて何らの異常も観られなかつた。そして、ヒー
トサイクル試験を含む長期耐熱性寿命試験、振動
試験、耐湿性試験を実施したところ、全項目共耐
熱性Ｂ種規格に合格することを確認した。 It is easy to remove the core metal after the above-mentioned pre-heating stage, and both the wound layer of the insulating sheet A and the wound layer of the insulating sheet B after the post-stage heating are void-free and no abnormality is observed. Ta. Then, we conducted a long-term heat resistance life test including a heat cycle test, a vibration test, and a moisture resistance test, and it was confirmed that all items passed the heat resistance class B standard.
Claims (1)
層を設けた絶縁シートＡを半硬化熱硬化性樹脂層
を外面として芯金上に巻回し、その上に、コイル
本体を設け、その上に、熱収縮性繊維基材に半硬
化状態で熱硬化性樹脂を含浸した絶縁シートＢを
巻回し、次いで、前段階加熱により、上記半硬化
状態の熱硬化性樹脂を溶融させると共に絶縁シー
トＢの巻回層を完全に熱収縮させ、その熱収縮力
により、絶縁シートＡの熱硬化性樹脂とコイル本
体並びに絶縁シートＢの熱硬化性樹脂とコイル本
体とを加圧接着させ、而るのち芯金を抜き取り、
後段階の加熱により、上記両絶縁シートＡ，Ｂの
熱硬化性樹脂の硬化を完了させ、樹脂の硬化収縮
は後段階加熱で生じさせることを特徴とするコイ
ルの製造方法。1. An insulating sheet A provided with a semi-cured thermosetting resin layer on at least one side is wound around a core bar with the semi-cured thermosetting resin layer as the outer surface, a coil body is provided on top of it, The insulating sheet B impregnated with a thermosetting resin in a semi-cured state is wound around a heat-shrinkable fiber base material, and then the semi-cured thermosetting resin is melted by pre-heating, and the insulating sheet B is wound. The circuit layer is completely heat-shrinked, and the heat-shrinking force causes the thermosetting resin of insulating sheet A to adhere to the coil body and the thermosetting resin of insulating sheet B to the coil body, and then the core metal Take out the
A method for manufacturing a coil, characterized in that curing of the thermosetting resin of both the insulating sheets A and B is completed by heating in a later stage, and curing shrinkage of the resin is caused by heating in a later stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13726281A JPS5839008A (en) | 1981-08-31 | 1981-08-31 | Manufacture of coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13726281A JPS5839008A (en) | 1981-08-31 | 1981-08-31 | Manufacture of coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5839008A JPS5839008A (en) | 1983-03-07 |
| JPS6316889B2 true JPS6316889B2 (en) | 1988-04-11 |
Family
ID=15194548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13726281A Granted JPS5839008A (en) | 1981-08-31 | 1981-08-31 | Manufacture of coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5839008A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04178222A (en) * | 1990-11-08 | 1992-06-25 | Nkk Corp | ERW steel pipe forming equipment |
| JPH04178221A (en) * | 1990-11-08 | 1992-06-25 | Nkk Corp | Device for forming resistance welded steel tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249459A (en) * | 1975-10-17 | 1977-04-20 | Nitto Electric Ind Co | Sheath insulation processing method for coil |
-
1981
- 1981-08-31 JP JP13726281A patent/JPS5839008A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5839008A (en) | 1983-03-07 |
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