JPH0245322B2 - ICHIJIKOIRUNOSEIZOHOHO - Google Patents
ICHIJIKOIRUNOSEIZOHOHOInfo
- Publication number
- JPH0245322B2 JPH0245322B2 JP57175395A JP17539582A JPH0245322B2 JP H0245322 B2 JPH0245322 B2 JP H0245322B2 JP 57175395 A JP57175395 A JP 57175395A JP 17539582 A JP17539582 A JP 17539582A JP H0245322 B2 JPH0245322 B2 JP H0245322B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- iron core
- primary coil
- resin
- varnish composition
- 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
Links
- 239000002966 varnish Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- AYMDJPGTQFHDSA-UHFFFAOYSA-N 1-(2-ethenoxyethoxy)-2-ethoxyethane Chemical compound CCOCCOCCOC=C AYMDJPGTQFHDSA-UHFFFAOYSA-N 0.000 description 1
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H01F41/127—Encapsulating or impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Insulating Of Coils (AREA)
Description
本発明は内燃機関の点火コイルに使用される一
次コイルの製造方法に関し、さらに詳しくは従来
より優れた耐圧特性を有する一次コイルの製造方
法に関する。
従来この種の一次コイルとして第１図に示すよ
うなものがある。即ち従来の一次コイルは鉄芯に
巻線を行ない、その後直接二次コイルと組合せた
後、ワツクス処理等を行つて点火コイルとしてい
た。しかしこのような点火コイルは使用中に一次
コイルに水分が浸入して鉄芯とコイルとの絶縁が
不良になり、点火コイル自体が絶縁不良を起こす
原因となつていた。
このような欠点を補う方法として一次コイルの
巻線上にワニス組成物を含浸させ、加熱硬化させ
て絶縁処理を施し防水処理する方法がある。しか
しこの方法では絶縁処理した一次コイルを二次コ
イル、高圧端子等と組合せて点火コイルとした
後、使用時の冷熱サイクル等により、密着性、耐
熱性のよい樹脂をワニス組成物としたにも拘ら
ず、鉄芯とワニス硬化物とが剥離を起こし、その
結果、水分等の浸入により絶縁特性が低下する。
この剥離は鉄と樹脂硬化物との熱膨張率の差によ
るためと考えられる。
本発明はこれらの問題を解決するためになされ
たもので、鉄芯に巻線したコイルにワニス処理す
る前に、予め巻線の両端部でワニス組成物が鉄芯
に付着する部分に、予め柔軟可撓性のある樹脂を
付着させた後、ワニス組成物を含浸硬化させるこ
とにより一次コイルの鉄芯とワイヤとの絶縁性能
を確実にしようとするものである。
本発明に使用される柔軟可撓性のある樹脂はウ
レタン樹脂、ポリブタジエン樹脂等が用いられ
る。かかる樹脂を第２図に示すように巻線したコ
イルの両端部で、後で処理するワニス組成物が鉄
芯に付着する部分に付着させる。
その後含浸硬化させるワニス組成物としてはエ
ポキシエステル系、エポキシ系のような耐熱性、
密着性の優れた樹脂が用いられるが、これら以外
に場合によつては耐熱性不飽和ポリエステル樹脂
も使用される。ワニス処理は第３図のように行な
われる。
本発明の方法によつて得られた一次コイルは冷
熱サイクル時における機械的ストレスがコイル両
端の柔軟性樹脂部で吸収されるために、鉄芯との
間に剥離が生せず、鉄芯とコイルの絶縁特性を低
下させることがない。従つて点火コイルとした際
にも信頼性が確保される。
次に実施例によつて具体的に本発明を説明す
る。
実施例、比較例
まず、第２図に示すように、巻線したコイルに
次の組成よりなる樹脂組成物を付着させ、120℃
×２時間加熱硬化させた。樹脂組成物は、ポリブ
タジエン樹脂Ｒ−45ACR（出光石油化学株式会社
製）75重量部、スチレン25重量部、ナフテン酸コ
バルト0.05重量部、ハイドロキノン0.02重量部、
硬化剤として１，１−ジ−ｔ−ブチルパーオキシ
シクロヘキサン３重量部よりなる。
次に、第３図に示すように、含浸用ワニス組成
物を滴下した後、120℃×30分加熱硬化させて一
次コイル(A)を作成した。ワニス組成物として、ビ
スフエノール型エポキシアクリレートVR−60
（昭和高分子株式会社製、商品名「リポキシ」）70
重量部、エチレングリコールジメタアクリレート
20重量部、スチレン10重量部、ナフテン酸コバル
ト0.05重量部、硬化剤としてｔ−ブチルパーオキ
シイソブチレート１重量部よりなる。
比較例として、樹脂組成物を付着させないで直
接前記のワニス組成物を滴下して120℃×30分加
熱硬化させて、一次コイル(B)を作成した。これら
の処理は、コイルを軸方向を中心として回転させ
ながら行つた。
これら実施例及び比較例のコイルに冷熱サイク
ル試験を行い、鉄芯と巻線間の抵抗値を測定し
た。100℃×１時間＋10℃（水中）×１時間の冷熱
サイクルを10サイクル終了後の測定結果を下表に
示す。
The present invention relates to a method of manufacturing a primary coil used in an ignition coil of an internal combustion engine, and more particularly to a method of manufacturing a primary coil having pressure resistance characteristics superior to those of the prior art. A conventional primary coil of this type is shown in FIG. That is, a conventional primary coil was wound around an iron core, then directly combined with a secondary coil, and then treated with wax to form an ignition coil. However, during use of such an ignition coil, moisture enters the primary coil, causing poor insulation between the iron core and the coil, causing poor insulation in the ignition coil itself. As a method of compensating for such drawbacks, there is a method of impregnating the winding of the primary coil with a varnish composition and heating and curing it to perform insulation treatment and waterproof treatment. However, in this method, the insulated primary coil is combined with the secondary coil, high-voltage terminal, etc. to form an ignition coil, and then a resin with good adhesion and heat resistance is made into a varnish composition through cooling and heating cycles during use. Regardless, the iron core and the cured varnish material peel off, resulting in a decrease in insulation properties due to infiltration of moisture and the like.
This peeling is thought to be due to the difference in thermal expansion coefficient between the iron and the cured resin. The present invention was made to solve these problems, and before applying varnish to a coil wound around an iron core, a varnish composition is applied to the parts of both ends of the winding where the iron core will be coated. After a flexible resin is attached, a varnish composition is impregnated and cured to ensure insulation performance between the iron core of the primary coil and the wire. As the flexible resin used in the present invention, urethane resin, polybutadiene resin, etc. are used. This resin is applied to both ends of the wound coil as shown in FIG. 2, where a varnish composition to be treated later will adhere to the iron core. The varnish composition that is then impregnated and cured is an epoxy ester type, a heat resistant epoxy type,
Resins with excellent adhesion are used, but in addition to these resins, heat-resistant unsaturated polyester resins may also be used in some cases. The varnish treatment is carried out as shown in FIG. In the primary coil obtained by the method of the present invention, mechanical stress during cooling and heating cycles is absorbed by the flexible resin parts at both ends of the coil, so no peeling occurs between the iron core and the iron core. Does not reduce the insulation properties of the coil. Therefore, reliability is ensured even when used as an ignition coil. Next, the present invention will be specifically explained with reference to Examples. Examples and Comparative Examples First, as shown in Figure 2, a resin composition having the following composition was applied to a wound coil, and
It was heated and cured for 2 hours. The resin composition contained 75 parts by weight of polybutadiene resin R-45ACR (manufactured by Idemitsu Petrochemical Co., Ltd.), 25 parts by weight of styrene, 0.05 parts by weight of cobalt naphthenate, 0.02 parts by weight of hydroquinone,
It consists of 3 parts by weight of 1,1-di-t-butylperoxycyclohexane as a curing agent. Next, as shown in FIG. 3, an impregnating varnish composition was dropped and then heated and cured at 120° C. for 30 minutes to create a primary coil (A). Bisphenol type epoxy acrylate VR-60 as a varnish composition
(manufactured by Showa Kobunshi Co., Ltd., product name "Lipoxy") 70
Part by weight, ethylene glycol dimethacrylate
20 parts by weight, 10 parts by weight of styrene, 0.05 parts by weight of cobalt naphthenate, and 1 part by weight of t-butylperoxyisobutyrate as a hardening agent. As a comparative example, a primary coil (B) was prepared by directly dropping the varnish composition without adhering the resin composition and heating and curing at 120° C. for 30 minutes. These treatments were performed while rotating the coil around the axial direction. The coils of these Examples and Comparative Examples were subjected to a thermal cycle test, and the resistance value between the iron core and the winding was measured. The table below shows the measurement results after completing 10 cooling/heating cycles of 100°C x 1 hour + 10°C (in water) x 1 hour.
【表】
以上のように、本発明により製造されたコイル
は耐湿特性に優れていることがわかる。[Table] As described above, it can be seen that the coil manufactured according to the present invention has excellent moisture resistance properties.
第１図は従来の一次コイルの側面図、第２図及
び第３図は本発明の一次コイルの一実施例の側面
図で、第２図は柔軟可撓性樹脂の付着の状況を示
し、第３図はその後のワニス処理した状況を示す
図である。
１……鉄芯、２……巻線、３……柔軟可撓性樹
脂、４……含浸用ワニス組成物。
FIG. 1 is a side view of a conventional primary coil, FIGS. 2 and 3 are side views of an embodiment of the primary coil of the present invention, and FIG. 2 shows how the flexible resin is attached. FIG. 3 is a diagram showing the subsequent varnish treatment. DESCRIPTION OF SYMBOLS 1... Iron core, 2... Winding wire, 3... Soft and flexible resin, 4... Varnish composition for impregnation.
Claims (1)
して硬化させる一次コイルの製造方法において、
巻線の両端部でワニス組成物が鉄芯に付着する部
分に、予め柔軟可撓性のある樹脂を付着させた
後、ワニス組成物を含浸硬化させることを特徴と
する一次コイルの製造方法。1. A method for manufacturing a primary coil in which a coil wound around an iron core is impregnated with a varnish composition and cured,
A method for manufacturing a primary coil, comprising the steps of: adhering a flexible resin in advance to the portions at both ends of the winding where the varnish composition adheres to the iron core, and then impregnating and curing the resin with a varnish composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57175395A JPH0245322B2 (en) | 1982-10-07 | 1982-10-07 | ICHIJIKOIRUNOSEIZOHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57175395A JPH0245322B2 (en) | 1982-10-07 | 1982-10-07 | ICHIJIKOIRUNOSEIZOHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5965420A JPS5965420A (en) | 1984-04-13 |
| JPH0245322B2 true JPH0245322B2 (en) | 1990-10-09 |
Family
ID=15995338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57175395A Expired - Lifetime JPH0245322B2 (en) | 1982-10-07 | 1982-10-07 | ICHIJIKOIRUNOSEIZOHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0245322B2 (en) |
-
1982
- 1982-10-07 JP JP57175395A patent/JPH0245322B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5965420A (en) | 1984-04-13 |
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