JP2004303934A - Method for manufacturing capacitor - Google Patents

Method for manufacturing capacitor Download PDF

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Publication number
JP2004303934A
JP2004303934A JP2003094890A JP2003094890A JP2004303934A JP 2004303934 A JP2004303934 A JP 2004303934A JP 2003094890 A JP2003094890 A JP 2003094890A JP 2003094890 A JP2003094890 A JP 2003094890A JP 2004303934 A JP2004303934 A JP 2004303934A
Authority
JP
Japan
Prior art keywords
capacitor
capacitor element
manufacturing
metallized plastic
film
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
Application number
JP2003094890A
Other languages
Japanese (ja)
Inventor
Mitsuharu Maruyama
光晴 丸山
Akihiro Kato
陽弘 加藤
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.)
Okaya Electric Industry Co Ltd
Original Assignee
Okaya Electric Industry 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 Okaya Electric Industry Co Ltd filed Critical Okaya Electric Industry Co Ltd
Priority to JP2003094890A priority Critical patent/JP2004303934A/en
Publication of JP2004303934A publication Critical patent/JP2004303934A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a capacitor which can suppress the vibration of the capacitor at a voltage applying time. <P>SOLUTION: The vibration of the capacitor which occurs at the voltage applying time is suppressed by impregnating a capacitor element formed by laminating and rolling up a metallized plastic film obtained by coating the front surface of a derivative film with an electrode film with a liquid-like insulator, such as, for example, a methyl hydrogen silicone oil of a cross-linking reaction monomer having a low viscosity of 25 mm<SP>2</SP>/s at 25°C, then polymerizing the methyl hydrogen silicone oil into high viscosity by heating at 130°C for 15 min or 100°C for 60 min. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、メタライズドプラスチックフィルムコンデンサの製造方法に係り、特に使用状態におけるコンデンサの共振現象を防止することができるコンデンサの製造方法に関するものである。
【0002】
【従来の技術】
従来、メタライズドプラスチックフィルムコンデンサの製造方法にあっては、ポリエチレンやポリプロピレン等からなる誘電体フィルムの表面に、その一側辺にマージン部が残されるように、アルミニウムや亜鉛等の金属材料からなる電極膜を蒸着して金属化フィルムを形成し、この金属化フィルムを一対、上記マージン部が反対側に配置されるように重ねた上で積層捲回してコンデンサ素子を形成する。そして、このコンデンサ素子にシリコンオイル等の絶縁オイルを含浸させた後、合成樹脂等からなる外装ケースに配置し、さらにケース開口部からエポキシ系やウレタン系の合成樹脂を注入し、これを加熱硬化させることで樹脂封止している(例えば、特許文献1参照。)。
【0003】
【特許文献1】
特開昭59−11615公報
【0004】
【発明が解決しようとする課題】
しかしながら、上述した従来のコンデンサの製造方法にあっては、封止用合成樹脂がコンデンサ素子を外装ケース内に固定するものの、コンデンサ素子内部のメタライズドプラスチックフィルムの間には低粘性の絶縁オイルが介在するのみであり、使用状態において、例えば高電圧が印加されそこに音楽信号が重畳されるとスピーカーと同じ原理でコンデンサが共振することがあった。特に、オーディオ用に用いられるコンデンサにあっては、機械的に共振することで電気信号にノイズを混入することなり音質の著しい劣化をもたらすものであった。そこでその対策として、コンデンサ素子をゴムバンドで縛ることも行われていた。しかしながら、このような作業は繁雑であるとともに、この方法を以てしてもコンデンサ素子全体をゴムバンドで縛ることはできず、コンデンサの共振を完全に防ぐことはできなかった。
【0005】
そこで本発明は、コンデンサの共振を確実に防ぐことができるコンデンサの製造方法の提供を目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するため、本発明のコンデンサの製造方法は、誘導体フィルムの表面に電極膜を被着したメタライズドプラスチックフィルムを積層捲回して形成したコンデンサ素子の上記メタライズドプラスチックフィルム間に液状絶縁体を含浸させ、次にこの液状絶縁体を高粘度化加工することで上記コンデンサ素子を固化し電圧印加時に発生するコンデンサの振動を抑制することを特徴とするものである。
【0007】
また、液状絶縁体を架橋反応性モノマー又はプレポリマーとし、これを重合させて高粘度化することを特徴とするものである。
【0008】
【発明の実施の形態】
図1〜図3は、本発明に係るケース外装型のコンデンサを示しており、図中1は本発明に係るコンデンサであり、このコンデンサ1は合成樹脂やセラミックス等の絶縁材料からなる外装ケース2内に、メタライズドプラスチックフィルムを積層捲回して形成した捲回素子の両端に形成したメタリコン電極4にそれぞれリード端子5を接続したコンデンサ素子3を、上記リード端子5を外装ケース2の外部に導出させて配置し、その上で外装ケース2内にエポキシ樹脂やウレタン樹脂等の封止用合成樹脂6を注入し、これを硬化させたものである。
【0009】
上記コンデンサ素子3は、図2に示すごとく、ポリエチレンテレフタレート、ポリプロピレン、ポリアミド等の合成樹脂からなる誘電体フィルム7の表面に、一端側にマージン部8を残してアルミニウムや亜鉛等の金属を蒸着させた一対のメタライズドプラスチックフィルム9(金属化プラスチックフィルム)を、それぞれのマージン部8が互いに反対側になるように重ねて捲回している。次に、これを所定の圧力で圧接することで偏平化させ、その両端面に亜鉛、錫、鉛等を溶射してメタリコン電極4を形成する。そして、メタライズドプラスチックフィルム9相互間の空気を取り除いて樹脂を含浸させるべく、真空含浸法等により上記メタリコン電極4面から液状絶縁体、例えば25℃で25mm/sと低粘度の架橋反応性モノマーであるメチルハイドロジェンシリコーンオイルを含浸させるのであるが、含浸後に重合させて高粘度とすべく、これに錫オクトエート、錫オレエート、亜鉛2−エチルヘキソエート等を触媒として約2重量%混ぜておく。そして、含浸後に余分なメチルハイドロジェンシリコーンオイルを遠心分離により除去し、その後130℃15分間、又は100℃60分間加熱することでメチルハイドロジェンシリコーンオイルを重合させ、これによりこのポリメチルハイドロジェンシリコーンオイルがコンデンサ素子の振動を抑制し、かつコンデンサ素子3から漏出しないように、高粘度化するものである。次に、メタリコン電極4にリード端子5を溶接(若しくはハンダ付)し、これを外装ケース2内に配置してエポキシ樹脂やウレタン樹脂等の封止用合成樹脂6を注入し、これを硬化させ開口部を封止することでコンデンサ1が完成するものである。
【0010】
尚、コンデンサ素子3に含浸させる絶縁オイルとしては、架橋反応性モノマーであるメチルハイドロジェンシリコーンオイル以外にも、プレポリマーや、2成分付加反応型の液状シリコーンゴムを混合して用いることもできる。この2成分付加反応型の液状シリコーンゴムを用いる場合には、2成分を均一になるまで混合し、巻き込んだ空気を真空脱泡し、これを真空含浸法等によりメタリコン電極面からコンデンサ素子3内に含浸させる。そして、適宜な温度に加熱することで硬化させるものである。
【0011】
【発明の効果】
以上詳述した如く、本発明のコンデンサの製造方法によれば、誘導体フィルムの表面に電極膜を被着したメタライズドプラスチックフィルムを積層捲回して形成したコンデンサ素子に液状絶縁体を含浸させ、次にこの液状絶縁体を高粘度化加工することで、メタライズドプラスチックフィルム相互間に含浸した液状絶縁体が高粘度化してコンデンサ素子全体を一体化し、振動そのもの発生を抑制するとともに、高粘度化した絶縁体が僅かな振動も好適に減衰・吸収するものである。
【0012】
また、液状絶縁体を架橋反応性モノマー又はプレポリマーとし、これを重合させて高粘度化することで、液状絶縁体をメタライズドプラスチックフィルム相互間へ含浸させやすく、かつ含浸させた液状絶縁体を容易に高粘度とすることができ、コンデンサの振動を確実に抑制することができる。
【図面の簡単な説明】
【図1】本発明に係るコンデンサを示す部分断面図である。
【図2】本発明のコンデンサの製造方法を示す説明図である。
【図3】本発明のコンデンサの製造方法を示す説明図である。
【符号の説明】
1 コンデンサ
2 外装ケース
3 コンデンサ素子
4 メタリコン電極
5 リード端子
6 封止用合成樹脂
7 誘電体フィルム
8 マージン部
9 メタライズドプラスチックフィルム
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a metallized plastic film capacitor, and more particularly, to a method for manufacturing a capacitor capable of preventing a resonance phenomenon of a capacitor in use.
[0002]
[Prior art]
Conventionally, in a method of manufacturing a metallized plastic film capacitor, an electrode made of a metal material such as aluminum or zinc is formed on a surface of a dielectric film made of polyethylene, polypropylene, or the like such that a margin is left on one side. A metallized film is formed by vapor deposition of a film, and a pair of the metallized films are stacked so that the margins are disposed on opposite sides, and then laminated and wound to form a capacitor element. After impregnating the capacitor element with insulating oil such as silicon oil, place it in an outer case made of synthetic resin, etc., and then inject epoxy or urethane-based synthetic resin through the case opening, and heat and cure it. Thus, resin sealing is performed (for example, refer to Patent Document 1).
[0003]
[Patent Document 1]
JP-A-59-11615
[Problems to be solved by the invention]
However, in the conventional method for manufacturing a capacitor described above, although the synthetic resin for sealing fixes the capacitor element in the outer case, a low-viscosity insulating oil is interposed between the metallized plastic films inside the capacitor element. In a use state, for example, when a high voltage is applied and a music signal is superimposed thereon, the capacitor sometimes resonates on the same principle as the speaker. Particularly, in a capacitor used for audio, mechanical resonance causes noise to be mixed into an electric signal, resulting in remarkable deterioration of sound quality. Therefore, as a countermeasure, a capacitor element was tied with a rubber band. However, such operations are complicated, and even with this method, the entire capacitor element cannot be bound with a rubber band, and the resonance of the capacitor cannot be completely prevented.
[0005]
Therefore, an object of the present invention is to provide a method for manufacturing a capacitor that can reliably prevent resonance of the capacitor.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a method of manufacturing a capacitor according to the present invention comprises the steps of: forming a liquid insulator between the metallized plastic films of a capacitor element formed by laminating and winding a metallized plastic film having an electrode film adhered to the surface of a derivative film; By impregnating and then subjecting the liquid insulator to high viscosity processing, the capacitor element is solidified and vibration of the capacitor generated when a voltage is applied is suppressed.
[0007]
Further, the liquid insulator is a cross-linking reactive monomer or a prepolymer, which is polymerized to increase the viscosity.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show a case-outer type capacitor according to the present invention. In the drawings, reference numeral 1 denotes a capacitor according to the present invention. This capacitor 1 is an outer case 2 made of an insulating material such as synthetic resin or ceramics. Inside, a capacitor element 3 in which lead terminals 5 are respectively connected to metallikon electrodes 4 formed on both ends of a wound element formed by laminating and winding a metallized plastic film is led out of the outer case 2. Then, a sealing synthetic resin 6 such as an epoxy resin or a urethane resin is injected into the outer case 2 and cured.
[0009]
As shown in FIG. 2, the capacitor element 3 is formed by depositing a metal such as aluminum or zinc on the surface of a dielectric film 7 made of a synthetic resin such as polyethylene terephthalate, polypropylene, or polyamide while leaving a margin 8 at one end. A pair of metallized plastic films 9 (metallized plastic films) are stacked and wound such that the margins 8 are on opposite sides. Next, this is flattened by pressing it under a predetermined pressure, and zinc, tin, lead, etc. are sprayed on both end surfaces to form a metallikon electrode 4. Then, in order to remove air between the metallized plastic films 9 and impregnate the resin, a liquid insulator, for example, a cross-linking reactive monomer having a low viscosity of 25 mm 2 / s at 25 ° C. Is mixed with about 2% by weight of tin octoate, tin oleate, zinc 2-ethylhexoate, etc. as a catalyst in order to polymerize after impregnation to obtain a high viscosity. deep. Then, after the impregnation, excess methyl hydrogen silicone oil is removed by centrifugation, and thereafter, the methyl hydrogen silicone oil is polymerized by heating at 130 ° C. for 15 minutes or at 100 ° C. for 60 minutes. This is to increase the viscosity so that oil suppresses vibration of the capacitor element and does not leak from the capacitor element 3. Next, the lead terminal 5 is welded (or soldered) to the metallikon electrode 4, placed in the outer case 2, injected with a sealing synthetic resin 6 such as an epoxy resin or a urethane resin, and cured. The capacitor 1 is completed by sealing the opening.
[0010]
The insulating oil impregnated in the capacitor element 3 may be a mixture of a prepolymer or a two-component addition reaction type liquid silicone rubber in addition to the methyl hydrogen silicone oil which is a crosslinking reactive monomer. When this two-component addition reaction type liquid silicone rubber is used, the two components are mixed until uniform, the entrained air is vacuum degassed, and this is removed from the metallikon electrode surface to the inside of the capacitor element 3 by a vacuum impregnation method or the like. Impregnated. Then, it is cured by heating to an appropriate temperature.
[0011]
【The invention's effect】
As described in detail above, according to the capacitor manufacturing method of the present invention, a liquid insulator is impregnated in a capacitor element formed by laminating and winding a metallized plastic film having an electrode film adhered to the surface of a derivative film, By processing this liquid insulator to increase the viscosity, the liquid insulator impregnated between the metallized plastic films increases in viscosity and integrates the entire capacitor element, suppressing the occurrence of vibration itself and increasing the viscosity of the insulator. Are suitable for damping and absorbing even slight vibrations.
[0012]
In addition, by forming the liquid insulator as a cross-linking reactive monomer or a prepolymer and polymerizing the same to increase the viscosity, the liquid insulator can be easily impregnated between the metallized plastic films, and the impregnated liquid insulator can be easily formed. Therefore, the vibration of the condenser can be reliably suppressed.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing a capacitor according to the present invention.
FIG. 2 is an explanatory view showing a method for manufacturing a capacitor of the present invention.
FIG. 3 is an explanatory view showing a method for manufacturing a capacitor of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Capacitor 2 Outer case 3 Capacitor element 4 Metallicon electrode 5 Lead terminal 6 Sealing synthetic resin 7 Dielectric film 8 Margin 9 Metallized plastic film

Claims (2)

誘導体フィルムの表面に電極膜を被着したメタライズドプラスチックフィルムを積層捲回して形成したコンデンサ素子の上記メタライズドプラスチックフィルム間に液状絶縁体を含浸させ、次にこの液状絶縁体を高粘度化加工することで上記コンデンサ素子を固化し電圧印加時に発生するコンデンサの振動を抑制することを特徴とするコンデンサの製造方法。A liquid insulator is impregnated between the metallized plastic films of the capacitor element formed by laminating and winding a metallized plastic film having an electrode film on the surface of a derivative film, and then the liquid insulator is processed to have a high viscosity. A method for manufacturing a capacitor, comprising solidifying the capacitor element and suppressing vibration of the capacitor when voltage is applied. 液状絶縁体を架橋反応性モノマー又はプレポリマーとし、これを重合させて高粘度化することを特徴とする請求項1記載のコンデンサの製造方法。2. The method for manufacturing a capacitor according to claim 1, wherein the liquid insulator is a cross-linking reactive monomer or a prepolymer, which is polymerized to increase the viscosity.
JP2003094890A 2003-03-31 2003-03-31 Method for manufacturing capacitor Pending JP2004303934A (en)

Priority Applications (1)

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Publications (1)

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Country Status (1)

Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7660099B2 (en) 2006-09-19 2010-02-09 Panasonic Corporation Case molded capacitor
JP2010516171A (en) * 2007-01-12 2010-05-13 ラトショー、クリフォード、ダブリュー. Vacuum tube preamplifier for bass electronic musical instruments
US8315031B2 (en) 2007-10-12 2012-11-20 Panasonic Corporation Case mold type capacitor
CN111868860A (en) * 2018-03-29 2020-10-30 京瓷株式会社 Film capacitor, connection type capacitor, inverter, and electric vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7660099B2 (en) 2006-09-19 2010-02-09 Panasonic Corporation Case molded capacitor
JP2010516171A (en) * 2007-01-12 2010-05-13 ラトショー、クリフォード、ダブリュー. Vacuum tube preamplifier for bass electronic musical instruments
US8315031B2 (en) 2007-10-12 2012-11-20 Panasonic Corporation Case mold type capacitor
CN111868860A (en) * 2018-03-29 2020-10-30 京瓷株式会社 Film capacitor, connection type capacitor, inverter, and electric vehicle
EP3780043A4 (en) * 2018-03-29 2022-03-09 Kyocera Corporation Film capacitor, connected capacitor, inverter, and electric-powered vehicle
CN111868860B (en) * 2018-03-29 2022-09-20 京瓷株式会社 Film capacitor, connection type capacitor, inverter, and electric vehicle
US11600447B2 (en) 2018-03-29 2023-03-07 Kyocera Corporation Film capacitor, combination type capacitor, inverter, and electric vehicle

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