JP3154643B2 - Method for manufacturing solid insulator coated conductor - Google Patents
Method for manufacturing solid insulator coated conductorInfo
- Publication number
- JP3154643B2 JP3154643B2 JP13810395A JP13810395A JP3154643B2 JP 3154643 B2 JP3154643 B2 JP 3154643B2 JP 13810395 A JP13810395 A JP 13810395A JP 13810395 A JP13810395 A JP 13810395A JP 3154643 B2 JP3154643 B2 JP 3154643B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- layer
- outer peripheral
- peripheral surface
- cover
- 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 - Fee Related
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- Manufacturing Of Electrical Connectors (AREA)
- Cable Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、固体絶縁開閉装置や
キュービクル形ガス絶縁開閉装置等に接続用導体として
用いられる絶縁性ゴム等の固体絶縁物が被覆された固体
絶縁物被覆導体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid insulator coated conductor coated with a solid insulator such as insulating rubber used as a connecting conductor in a solid insulated switchgear, a cubicle type gas insulated switchgear, and the like. is there.
【０００２】[0002]
【従来の技術】図３は例えば特公昭５０−３０８２３号
公報に記載された従来の固体絶縁開閉装置を示す背面図
であり、図において１は開閉装置の固定フレーム、２は
固定フレーム１に取り付けられた母線継手、３は各開閉
装置の母線継手２間を接続する接続導体、４はケーブル
接続部、５はケーブルである。ここで、母線継手２は、
開閉装置における断路部をも構成することから、一般に
エポキシ樹脂等の固い絶縁物によって内部導体を被覆し
た構造となっている。一方、接続導体３は、各開閉装置
間の据付誤差や直列に接続されている背面母線構成全体
の熱伸縮を吸収する必要上、主として絶縁性ゴムによっ
て内部導体を被覆した構造となっている。このように構
成された母線継手２と接続導体３とは、例えば特開平４
−３０６５７１号公報に記載されている接続方法によっ
て、相互接続されている。2. Description of the Related Art FIG. 3 is a rear view showing a conventional solid insulated switchgear described in Japanese Patent Publication No. 50-30823, for example. The busbar joints 3 are connection conductors for connecting the busbar joints 2 of the respective switchgears, 4 is a cable connecting portion, and 5 is a cable. Here, the busbar joint 2 is
Since the disconnecting portion in the switchgear is also configured, the internal conductor is generally covered with a hard insulator such as epoxy resin. On the other hand, the connection conductor 3 has a structure in which the inner conductor is mainly covered with insulating rubber because it is necessary to absorb the installation error between the respective switching devices and the thermal expansion and contraction of the entire back bus configuration connected in series. The busbar joint 2 and the connecting conductor 3 configured as described above are described in, for example,
They are interconnected by the connection method described in JP-A-306571.
【０００３】ついで、接続導体３の構造について図４を
参照しつつ説明する。内部導体３０は導電性金属材料、
例えば銅材を加工して円柱状に作製されている。この内
部導体３０の両端部を除く外周面には、第１の導電体層
としての第１の導電性ゴム層３１が例えば数ミリ厚被覆
成形されている。そして、ＥＰゴム（エチレンプロピレ
ンゴム）等からなる固体絶縁物層としての絶縁性ゴム層
３２が第１の導電性ゴム層３１の外周面を覆うように被
覆成形されている。さらに、第２の導電体層としての第
２の導電性ゴム層３３が絶縁性ゴム層３２の外周面を覆
うように被覆成形されて、固体絶縁物被覆導体としての
接続導体３が構成されている。ここで、絶縁性ゴム層３
２における半径方向の電位分布を接続導体３の全長にわ
たって極力均一にするために、第１の導電性ゴム層３１
が絶縁性ゴム層３２の内面側全長にわたって形成されて
いる。そして、絶縁性ゴム層３２の端面３２ａ，３２ｂ
には、半径方向の絶縁耐力を維持するために、第１およ
び第２の導電性ゴム層３１，３３は形成されていない。
また、第１の導電性ゴム層３１は、内部導体３０と絶縁
性ゴム層３２との間に介在し、絶縁性ゴム層３２と内部
の充電部（第１の導電性ゴム層３１も含む）との密着性
を確実なものとし、当該部の部分的な剥離を防止し、剥
離による充電時の電位分布の乱れ（電界集中等）の発生
を抑えている。また、第２の導電性ゴム層３３は、内部
導体３０に通電が行われた場合に絶縁性ゴム層３２に生
じる電界を緩和するとともに、導電性ゴム層３３を接地
することにより人体が接続導体３に接触した場合に電気
的衝撃を解消している。なお、内部導体３０の外周面に
は、第１の導電性ゴム層３１と内部導体３０との結合力
を高めるために、ローレット加工が施されてわずかな凹
凸が形成されている。Next, the structure of the connection conductor 3 will be described with reference to FIG. The inner conductor 30 is made of a conductive metal material,
For example, it is formed into a column shape by processing a copper material. A first conductive rubber layer 31 as a first conductive layer is formed on the outer peripheral surface of the inner conductor 30 excluding both end portions by coating, for example, a few millimeters thick. Then, an insulating rubber layer 32 as a solid insulator layer made of EP rubber (ethylene propylene rubber) or the like is formed so as to cover the outer peripheral surface of the first conductive rubber layer 31. Further, a second conductive rubber layer 33 as a second conductor layer is formed by coating so as to cover the outer peripheral surface of the insulating rubber layer 32 to form the connection conductor 3 as a solid insulator-coated conductor. I have. Here, the insulating rubber layer 3
In order to make the potential distribution in the radial direction of the second conductor 2 as uniform as possible over the entire length of the connection conductor 3, the first conductive rubber layer 31
Are formed over the entire length of the insulating rubber layer 32 on the inner surface side. Then, the end faces 32a, 32b of the insulating rubber layer 32
No first and second conductive rubber layers 31 and 33 are formed to maintain the dielectric strength in the radial direction.
In addition, the first conductive rubber layer 31 is interposed between the internal conductor 30 and the insulating rubber layer 32, and is connected to the insulating rubber layer 32 and the internal charging portion (including the first conductive rubber layer 31). To prevent partial separation of the portion, and suppress occurrence of disturbance of potential distribution (electric field concentration or the like) during charging due to separation. Further, the second conductive rubber layer 33 reduces the electric field generated in the insulating rubber layer 32 when the internal conductor 30 is energized, and grounds the conductive rubber layer 33 so that the human body can connect with the connection conductor. In case of contact with No. 3, the electric shock is eliminated. It should be noted that the outer peripheral surface of the inner conductor 30 is subjected to knurling in order to increase the bonding force between the first conductive rubber layer 31 and the inner conductor 30, so that slight irregularities are formed.
【０００４】つぎに、このように構成された接続導体３
の製造方法について図５を参照しつつ説明する。まず、
内部導体３０の両端に金型１０ａ，１０ｂをそれぞれ嵌
着する。そして、金型１０ａ，１０ｂの外周面および内
部導体３０の露出する外周面に導電性ゴムからなる内皮
テープ３４を螺旋状に隙間なく巻回する。ついで、あら
かじめ成形しておいた導電性ゴムからなる筒状の外皮３
５と、内皮テープ３４が巻回された内部導体３０とを、
内部導体３０を外皮３５内に同軸的に位置するように金
型に組み込む。そして、押出機（図示せず）により混練
された高粘度の流動性をもつ絶縁性ゴムを金型内に押し
出し注入する。この時、絶縁性ゴムは内皮テープ３４と
外皮３５との間に注入される。その後、全体を加硫し、
離型して、内部導体３０が比較的高い硬度のゴム状弾性
を有する固体絶縁物層で被覆された接続導体３を得る。Next, the connecting conductor 3 constructed as described above
Will be described with reference to FIG. First,
The molds 10a and 10b are fitted to both ends of the internal conductor 30, respectively. Then, an inner skin tape 34 made of conductive rubber is spirally wound around the outer peripheral surfaces of the molds 10a and 10b and the exposed outer peripheral surface of the internal conductor 30 without any gap. Next, a cylindrical outer cover 3 made of conductive rubber formed in advance.
5 and the inner conductor 30 around which the inner skin tape 34 is wound,
The inner conductor 30 is incorporated in a mold so as to be coaxially located in the outer cover 35. Then, an insulating rubber having a high viscosity and fluidity kneaded by an extruder (not shown) is extruded and injected into a mold. At this time, the insulating rubber is injected between the inner skin tape 34 and the outer skin 35. After that, the whole is vulcanized,
After release, the connection conductor 3 in which the inner conductor 30 is covered with a solid insulator layer having a relatively high hardness and rubber-like elasticity is obtained.
【０００５】このように製造された接続導体３は、絶縁
性ゴムの押出注入成形時に、絶縁性ゴムの高粘度のため
に、内部導体３０に巻回された内皮テープ３４および外
皮３５と絶縁性ゴムとの間に大きな摩擦力が発生する。
そして、内皮テープ３４は内部導体３０に巻回されてい
るので、内部導体３０の長さ方向では凹凸を有する表面
状態となっており、絶縁性ゴムが注入される際に大きな
摩擦力が作用してしまう。さらに、内皮テープ３４は未
加硫状態であることから、柔らかい。そこで、内皮テー
プ３４が絶縁性ゴムの注入方向（図６に矢印Ａで示され
る方向）にずれて、図６にＢで示されるメクレ現象やＣ
で示される巻き込みが発生することがある。このような
状態で製造されると、メクレ現象や巻き込みにより第１
の導電性ゴム層３１と第２の導電性ゴム層３３との絶縁
距離（図６のｅ，ｆ）が短くなり、所定の絶縁耐力が確
保できなくなるという不具合が発生してしまう。また、
メクレ現象や巻き込みの発生にともない内部導体３０に
密着している第１の導電性ゴム層３１が偏肉となり、最
悪の場合には図７に示されるように内部導体３０の軸方
向に断層Ｄが生じてしまう。この場合、開閉装置の課電
運転中に、断層Ｄの部位で局部的に電位分布が大きく乱
れ、部分放電が起こり、経年的絶縁劣化をきたすという
不具合が発生してしまう。[0005] The connection conductor 3 manufactured in this manner is insulated from the inner sheath tape 34 and the outer cover 35 wound around the inner conductor 30 due to the high viscosity of the insulating rubber during extrusion molding of the insulating rubber. A large frictional force is generated between the rubber.
Since the inner sheath tape 34 is wound around the inner conductor 30, the inner conductor 30 has an uneven surface in the length direction of the inner conductor 30, and a large frictional force acts when the insulating rubber is injected. Would. Further, since the inner skin tape 34 is in an unvulcanized state, it is soft. Then, the endothelial tape 34 shifts in the direction of injecting the insulating rubber (the direction indicated by the arrow A in FIG. 6), and the Meckle phenomenon or C shown in FIG.
May occur. When manufactured in such a state, the first
The insulation distance (e, f in FIG. 6) between the conductive rubber layer 31 and the second conductive rubber layer 33 becomes short, and a problem occurs that a predetermined dielectric strength cannot be secured. Also,
The first conductive rubber layer 31 that is in close contact with the inner conductor 30 becomes uneven due to the occurrence of the scraping phenomenon and the entrapment, and in the worst case, the fault D extends in the axial direction of the inner conductor 30 as shown in FIG. Will occur. In this case, during the power-supplying operation of the switchgear, the potential distribution is greatly disturbed locally at the site of the fault D, a partial discharge occurs, and a long-term insulation deterioration occurs.
【０００６】その改善策として、例えば特公昭４９−１
２０６２号公報に記載されているように、絶縁性ゴムの
押出注入に先立って内部導体３０にプレスまたは押出成
形により第１の導電性ゴム層３１を加硫成形する方法が
提案されている。しかしながら、絶縁性ゴムの押出注入
の後、全体を加硫する際に、第１の導電性ゴム層３１は
既に加硫されて硬化されており、第１の導電性ゴム層３
１と絶縁性ゴム層３２との密着性が低下してしまう。そ
こで、第１の導電性ゴム層３１と絶縁性ゴム層３２との
間に剥離が生じやすく、剥離が生じた場合には、剥離部
の空隙にコロナ放電が生じ絶縁性ゴム層３２を損傷して
しまうという不具合が発生してしまう。As an improvement measure, for example, Japanese Patent Publication No. 49-1
As described in JP-A-2062, there is proposed a method of vulcanizing and molding the first conductive rubber layer 31 on the internal conductor 30 by pressing or extrusion prior to the injection of the insulating rubber. However, when the whole is vulcanized after the extrusion injection of the insulating rubber, the first conductive rubber layer 31 is already vulcanized and cured, and the first conductive rubber layer 3
1 and the insulating rubber layer 32 have reduced adhesion. Therefore, peeling is likely to occur between the first conductive rubber layer 31 and the insulating rubber layer 32. If the peeling occurs, corona discharge occurs in the gap of the peeled portion, and the insulating rubber layer 32 is damaged. This causes a problem that it will occur.
【０００７】[0007]
【発明が解決しようとする課題】従来の固体絶縁物被覆
導体は以上のように製造されているので、絶縁性ゴムの
押出注入時に内皮テープ３４にメクレ現象や巻き込みが
発生してしまい、第１の導電性ゴム層３１と第２の導電
性ゴム層３３との絶縁距離が短くなり、所定の絶縁耐力
が確保できなくなり、第１の導電性ゴム層３１に内部導
体３０の軸方向に断層Ｄが生じ、経年的絶縁劣化をきた
すという課題があった。また、内皮テープ３４をテープ
張力をコントロールしつつ均一に、かつ、凹凸なく内部
導体３０に巻回することにより、絶縁性ゴムの押出注入
時に内皮テープ３４にメクレ現象や巻き込みの発生を低
減させることもできるが、そのような巻回作業は熟練を
要するとともに、歩留まりが悪く、コスト高となってし
まうという課題もあった。また、改善策としての固体絶
縁物被覆導体の製造方法では、絶縁性ゴムの押出注入に
先立って内部導体３０にプレスまたは押出成形により第
１の導電性ゴム層３１を加硫成形しているので、絶縁性
ゴムの押出注入の後、全体を加硫する際に、第１の導電
性ゴム層３１は既に加硫されて硬化されており、第１の
導電性ゴム層３１と絶縁性ゴム層３２との密着性が低下
してしまい、第１の導電性ゴム層３１と絶縁性ゴム層３
２との間に剥離が生じやすいという課題があった。Since the conventional solid insulator-coated conductor is manufactured as described above, the inner tape 34 may be curled or entangled during extrusion of the insulating rubber. The insulation distance between the conductive rubber layer 31 and the second conductive rubber layer 33 becomes short, and a predetermined dielectric strength cannot be secured, and the first conductive rubber layer 31 has a fault D in the axial direction of the internal conductor 30. This causes a problem that the insulation deteriorates over time. Further, by winding the inner skin tape 34 around the inner conductor 30 uniformly and without irregularities while controlling the tape tension, it is possible to reduce the occurrence of the curling phenomenon and the entanglement of the inner skin tape 34 during the extrusion injection of the insulating rubber. However, such a winding operation requires skill, and has a problem that the yield is low and the cost is high. Further, in the method of manufacturing a solid insulator-coated conductor as an improvement, the first conductive rubber layer 31 is vulcanized and formed on the internal conductor 30 by pressing or extrusion prior to extrusion of the insulating rubber. When the whole is vulcanized after the injection of the insulating rubber, the first conductive rubber layer 31 is already vulcanized and cured, and the first conductive rubber layer 31 and the insulating rubber layer 32, the first conductive rubber layer 31 and the insulating rubber layer 3
There is a problem that peeling easily occurs between them.
【０００８】この発明は、上記のような課題を解決する
ためになされたもので、作業性を改善し、歩留まりを向
上させることができるとともに、コスト低減を図ること
ができる固体絶縁物被覆導体の製造方法を得ることを目
的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to improve the workability, improve the yield, and reduce the cost. The purpose is to obtain a manufacturing method.
【０００９】[0009]
【課題を解決するための手段】この発明の第１の発明に
係る固体絶縁物被覆導体の製造方法は、柱状の内部導体
と、内部導体の外周面を覆うように被覆成形された第１
の導電体層と、第１の導電体層の外周面を覆うように被
覆成形された固体絶縁物層と、固体絶縁物層の外周面を
覆うように被覆成形された第２の導電体層とを備えた固
体絶縁物被覆導体の製造方法において、未加硫の導電性
ゴム材からなる内皮テープを内部導体の外周面を覆うよ
うに螺旋状に隙間なく巻回し、その後内皮テープを半加
硫する工程と、導電性ゴム材を筒状に成形して外皮を形
成する工程と、半加硫された内皮テープが被覆された内
部導体と外皮とを金型内に配置し、内皮テープと外皮と
の間に絶縁性ゴムを押出注入し、加硫して、内部導体の
外周面上に第１の導電体層、固体絶縁物層および第２の
導電体層を一体に積層形成する工程とを有するものであ
る。According to a first aspect of the present invention, there is provided a method of manufacturing a conductor coated with a solid insulator, comprising: a column-shaped inner conductor;
, A solid insulator layer formed to cover the outer peripheral surface of the first conductor layer, and a second conductor layer formed to cover the outer peripheral surface of the solid insulator layer In the method for producing a solid insulator-coated conductor, the inner conductor tape made of an unvulcanized conductive rubber material is spirally wound without any gap so as to cover the outer peripheral surface of the inner conductor, and thereafter the inner skin tape is half-cured. Vulcanizing, forming a conductive rubber material into a tubular shape to form an outer cover, and disposing the inner conductor and the outer cover coated with the semi-vulcanized inner cover in a mold, A step of extruding and vulcanizing an insulating rubber between itself and the outer cover, vulcanizing, and integrally forming a first conductor layer, a solid insulator layer, and a second conductor layer on the outer peripheral surface of the inner conductor; And
【００１０】また、この発明の第２の発明に係る固体絶
縁物被覆導体の製造方法は、柱状の内部導体と、内部導
体の外周面を覆うように被覆成形された第１の導電体層
と、第１の導電体層の外周面を覆うように被覆成形され
た固体絶縁物層と、固体絶縁物層の外周面を覆うように
被覆成形された第２の導電体層とを備えた固体絶縁物被
覆導体の製造方法において、未加硫の導電性ゴム材から
なる内皮テープを内部導体の外周面を覆うように螺旋状
に隙間なく巻回し、その後内皮テープを半加硫する工程
と、半加硫された内皮テープが被覆された内部導体を金
型内に配置し、内皮テープの外周面に絶縁性樹脂を押出
注入し、加硫して、内部導体の外周面上に第１の導電体
層および固体絶縁物層を一体に積層形成する工程と、離
型して固体絶縁物層の外周面を覆うように導電性材料を
被覆して第２の導電体層を形成する工程とを有するもの
である。Further, according to a second aspect of the present invention, there is provided a method for manufacturing a solid insulator-coated conductor, comprising: a columnar inner conductor; and a first conductor layer formed by coating so as to cover an outer peripheral surface of the inner conductor. A solid insulator comprising: a solid insulator layer formed so as to cover the outer peripheral surface of the first conductor layer; and a second conductor layer formed to cover the outer peripheral surface of the solid insulator layer. In the method of manufacturing an insulator-coated conductor, a step of spirally winding an inner vulcanized tape made of an unvulcanized conductive rubber material without any gap so as to cover the outer peripheral surface of the inner conductor, and then semi-vulcanizing the inner vulcanized tape, The inner conductor covered with the semi-vulcanized inner tape is placed in a mold, and an insulating resin is extruded and injected into the outer peripheral surface of the inner tape, vulcanized, and the first conductor is placed on the outer peripheral surface of the inner conductor. A step of integrally laminating the conductor layer and the solid insulator layer; Conductive material so as to cover the outer peripheral surface and coating and a step of forming a second conductor layer.
【００１１】[0011]
【作用】この発明の第１の発明においては、内皮テープ
と外皮との間に絶縁性ゴムを押出注入するに先立って、
内部導体に被覆された内皮テープを半加硫しているの
で、内部導体に被覆された内皮テープは硬化が所定レベ
ルまで進行されて、伸びが小さくなっている。そこで、
内皮テープと外皮との間に注入される絶縁性ゴムにより
内皮テープに摩擦力が作用しても、絶縁性ゴムの注入方
向への内皮テープのずれが抑えられ、内皮テープのメク
レ現象、巻き込みあるいは断層の発生が抑制される。そ
して、絶縁性ゴムの注入後に加硫することにより、内皮
テープが加硫されて内部導体の外周面を覆うように第１
の導電体層が被覆成形され、同時に絶縁性ゴムが加硫さ
れて第１の導電体層の外周面を覆うように固定絶縁物層
が被覆成形され、さらに外皮が固定絶縁物層の外周面を
覆うように被覆成形されて第２の導電体層が形成され、
内部導体の外周面上に第１の導電体層、固体絶縁物層お
よび第２の導電体層を一体に積層形成できる。この時、
半加硫されている内皮テープも加硫されるので、第１の
導電体層と固体絶縁物層との密着性の低下が抑えられ、
第１の導電体層と固体絶縁物層との間での剥離の発生が
防止される。なお、半加硫とは、加硫による化学的架橋
が未完了な状態を示すもので、加硫工程を途中で停止し
たものである。In the first aspect of the present invention, prior to extruding the insulating rubber between the inner skin tape and the outer skin,
Since the endothelial tape coated on the inner conductor is semi-vulcanized, the curing of the endothelial tape coated on the inner conductor is advanced to a predetermined level, and the elongation is reduced. Therefore,
Even if a frictional force acts on the endothelial tape due to the insulating rubber injected between the endothelial tape and the outer skin, the displacement of the endothelial tape in the direction of injection of the insulating rubber is suppressed, so that the inner tape may be curled, entangled or The occurrence of a fault is suppressed. Then, by vulcanizing after the insulative rubber is injected, the first coating is vulcanized to cover the outer peripheral surface of the inner conductor.
And a fixed insulator layer is coated and formed so as to cover the outer peripheral surface of the first conductor layer, and the outer skin is formed on the outer peripheral surface of the fixed insulator layer. To form a second conductor layer so as to cover
The first conductor layer, the solid insulator layer, and the second conductor layer can be integrally laminated on the outer peripheral surface of the internal conductor. At this time,
Since the semi-vulcanized endothelial tape is also vulcanized, a decrease in adhesion between the first conductor layer and the solid insulator layer is suppressed,
The occurrence of peeling between the first conductor layer and the solid insulator layer is prevented. The semi-vulcanization refers to a state in which the chemical crosslinking by vulcanization is not completed, and is a state in which the vulcanization step is stopped halfway.
【００１２】また、この発明の第２の発明においては、
内皮テープの外周に絶縁性樹脂を押出注入するに先立っ
て、内部導体に被覆された内皮テープを半加硫している
ので、内部導体に被覆された内皮テープは硬化が所定レ
ベルまで進行されて、伸びが小さくなっている。そこ
で、内皮テープの外周に注入される絶縁性樹脂により内
皮テープに摩擦力が作用しても、絶縁性樹脂の注入方向
への内皮テープのずれが抑えられ、内皮テープのメクレ
現象、巻き込みあるいは断層の発生が抑制される。そし
て、絶縁性樹脂の注入後に加硫することにより、内皮テ
ープが加硫されて内部導体の外周面を覆うように第１の
導電体層が被覆成形され、同時に絶縁性樹脂が加硫され
て第１の導電体層の外周面を覆うように固定絶縁物層が
被覆成形されて、内部導体の外周面上に第１の導電体層
および固体絶縁物層を一体に積層形成できる。この時、
半加硫されている内皮テープも加硫されるので、第１の
導電体層と固体絶縁物層との密着性の低下が抑えられ、
第１の導電体層と固体絶縁物層との間での剥離の発生が
防止される。In a second aspect of the present invention,
Prior to extruding the insulating resin to the outer periphery of the inner tape, the inner tape covered with the inner conductor is semi-vulcanized, so that the inner tape covered with the inner conductor is cured to a predetermined level. , The elongation is small. Therefore, even if a frictional force acts on the endothelial tape due to the insulating resin injected into the outer periphery of the endothelial tape, the slippage of the endothelial tape in the direction of injection of the insulating resin is suppressed, so that the inner tape may be dislodged, entangled or faulty Is suppressed. Then, by vulcanizing after injecting the insulating resin, the inner conductor tape is vulcanized and the first conductor layer is coated and formed so as to cover the outer peripheral surface of the inner conductor, and at the same time, the insulating resin is vulcanized. The fixed insulator layer is formed so as to cover the outer peripheral surface of the first conductor layer, and the first conductor layer and the solid insulator layer can be integrally laminated on the outer peripheral surface of the internal conductor. At this time,
Since the semi-vulcanized endothelial tape is also vulcanized, a decrease in adhesion between the first conductor layer and the solid insulator layer is suppressed,
The occurrence of peeling between the first conductor layer and the solid insulator layer is prevented.
【００１３】[0013]
【実施例】以下、この発明の実施例を図について説明す
る。 実施例１．図１はこの発明の実施例１に係る固体絶縁物
被覆導体の製造方法を説明する工程フローであり、図に
おいて図３乃至図５に示した従来の固体絶縁物被覆導体
と同一または相当部分には同一符号を付し、その説明を
省略する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a process flow for explaining a method for manufacturing a solid insulator-coated conductor according to Embodiment 1 of the present invention. In the drawing, the same or corresponding portions as those of the conventional solid insulator-coated conductor shown in FIGS. Are denoted by the same reference numerals, and description thereof is omitted.
【００１４】つぎに、この実施例１による固体絶縁物被
覆導体の製造方法について図１を参照しつつ説明する。
まず、内部導体３０の両端に金型１０ａ，１０ｂをそれ
ぞれ嵌着する。そして、金型１０ａ，１０ｂの外周面お
よび内部導体３０の露出する外周面に導電性ゴム（例え
ば塩化ブチルにカーボンブラック、グラファイトなどの
導電性材料を混合したもの）からなる未加硫の内皮テー
プ３４を螺旋状に隙間なく巻回する。その後、内部導体
３０および金型１０ａ，１０ｂの外周面に巻回された内
皮テープ３４を半加硫させる。ついで、あらかじめ成形
しておいた導電性ゴムからなる筒状の外皮３５と、内皮
テープ３４が巻回された内部導体３０とを、内部導体３
０を外皮３５内に同軸的に位置するように金型に組み込
む。そして、押出機（図示せず）により混練された高粘
度の流動性をもつ絶縁性ゴムを金型内に押し出し注入す
る。この時、絶縁性ゴムは内皮テープ３４と外皮３５と
の間に注入される。その後、全体を加硫する。そこで、
内皮テープ３４が加硫されて内部導体３０の外周面を被
覆する第１の導電性ゴム層３１が成形され、絶縁性ゴム
が加硫されて第１の導電性ゴム層３１の外周面を被覆す
る絶縁性ゴム層３２が成形され、さらに外皮３５が絶縁
性ゴム層３２の外周面を覆うように被覆されて第２の導
電性ゴム層３３が成形される。ついで、離型して、内部
導体３０が比較的高い硬度のゴム状弾性を有する固体絶
縁物層で被覆された接続導体３を得る。Next, a method for manufacturing the solid insulator-coated conductor according to the first embodiment will be described with reference to FIG.
First, the molds 10a and 10b are fitted to both ends of the internal conductor 30, respectively. An unvulcanized endothelial tape made of a conductive rubber (for example, a mixture of butyl chloride and a conductive material such as carbon black or graphite) on the outer peripheral surfaces of the molds 10a and 10b and the exposed outer peripheral surface of the internal conductor 30. 34 is spirally wound without any gap. Then, the inner conductor 30 and the inner skin tape 34 wound around the outer peripheral surfaces of the molds 10a and 10b are semi-vulcanized. Next, the cylindrical outer cover 35 made of conductive rubber formed in advance and the inner conductor 30 around which the inner skin tape 34 is wound are connected to the inner conductor 3.
0 is incorporated in the mold so as to be coaxially located in the outer cover 35. Then, an insulating rubber having a high viscosity and fluidity kneaded by an extruder (not shown) is extruded and injected into a mold. At this time, the insulating rubber is injected between the inner skin tape 34 and the outer skin 35. Then, the whole is vulcanized. Therefore,
The inner conductive tape 34 is vulcanized to form a first conductive rubber layer 31 covering the outer peripheral surface of the inner conductor 30, and the insulating rubber is vulcanized to cover the outer peripheral surface of the first conductive rubber layer 31. The insulating rubber layer 32 to be formed is formed, and the outer skin 35 is further covered so as to cover the outer peripheral surface of the insulating rubber layer 32, so that the second conductive rubber layer 33 is formed. Next, the mold is released to obtain the connection conductor 3 in which the inner conductor 30 is covered with a relatively high hardness rubber-like elastic solid insulator layer.
【００１５】このように製造された接続導体３は、絶縁
性ゴムの押出注入成形時に、絶縁性ゴムの高粘度のため
に、内部導体３０に巻回された内皮テープ３４および外
皮３５と絶縁性ゴムとの間に大きな摩擦力が発生する。
そして、内皮テープ３４は内部導体３０に巻回されてい
るので、内部導体３０の長さ方向では凹凸を有する表面
状態となっており、絶縁性ゴムが注入される際に大きな
摩擦力が作用してしまう。しかしながら、内皮テープ３
４は内部導体３０に巻回された後、半加硫工程が施され
ているので、ゴム状鎖状高分子が部分的に架橋され、内
皮テープ３４の硬度が増し、伸びが小さくなるととも
に、内皮テープ３４と内部導体３０との軸方向の密着性
が増大する。そこで、絶縁性ゴムを押出注入する際に内
皮テープ３４に作用する大きな摩擦力に対する内皮テー
プ３４の抗力が増し、内皮テープ３４は絶縁性ゴムの注
入方向にずれたり、変形したりせず、従来の製造方法で
発生していたメクレ現象、巻き込みあるいは断層の発生
を防止することができる。このように、この実施例１に
よれば、絶縁性ゴムの押出注入に先立って内皮テープ３
４を半加硫工程を施しているので、絶縁性ゴムの押出注
入時における内皮テープ３４のメクレ現象、巻き込みあ
るいは断層の発生を抑制でき、第１の導電性ゴム層３１
と第２の導電性ゴム層３３との絶縁距離を十分に確保で
き、所定の絶縁耐力が確保できるとともに、経年的絶縁
劣化を抑えられる接続導体３を安定して、高歩留まりで
製造することができる。The connection conductor 3 manufactured in this manner is insulated from the inner conductor tape 34 and the outer cover 35 wound around the inner conductor 30 due to the high viscosity of the insulating rubber during extrusion molding of the insulating rubber. A large frictional force is generated between the rubber.
Since the inner sheath tape 34 is wound around the inner conductor 30, the inner conductor 30 has an uneven surface in the length direction of the inner conductor 30, and a large frictional force acts when the insulating rubber is injected. Would. However, endothelial tape 3
4 is wound around the inner conductor 30 and then subjected to a semi-vulcanization step, so that the rubber-like chain polymer is partially cross-linked, the hardness of the endothelial tape 34 increases, the elongation decreases, and Axial adhesion between the inner skin tape 34 and the inner conductor 30 in the axial direction increases. Therefore, the resistance of the endothelial tape 34 against the large frictional force acting on the endothelial tape 34 when extruding and injecting the insulating rubber increases, and the endothelial tape 34 does not shift or deform in the direction of injecting the insulating rubber. It is possible to prevent the curl phenomenon, entanglement, or occurrence of a fault that occurred in the method of (1). As described above, according to the first embodiment, the inner sheath tape 3 is extruded prior to the extrusion injection of the insulating rubber.
4 is subjected to a semi-vulcanization step, so that it is possible to suppress the curling phenomenon, entangling or occurrence of a fault of the endothelial tape 34 at the time of extruding and injecting the insulating rubber.
The insulation distance between the second conductive rubber layer 33 and the second conductive rubber layer 33 can be sufficiently ensured, a predetermined dielectric strength can be ensured, and the connection conductor 3 that can suppress the deterioration over time of the insulation can be stably manufactured at a high yield. it can.
【００１６】また、従来の製造方法では、絶縁性ゴムの
押出注入時における内皮テープ３４にメクレ現象や巻き
込みの発生を低減させるために、内皮テープ３４をテー
プ張力をコントロールしつつ均一に、かつ、凹凸なく内
部導体３０に巻回する必要があった。そして、この内皮
テープ３４の巻回作業は熟練を要し、歩留まりの低下、
高コスト化をもたらしていた。しかしながら、この実施
例１による製造方法では、内皮テープ３４は内部導体３
０に巻回された後、絶縁性ゴムの押出注入工程に先立っ
て半加硫工程が施されるので、熟練を要することなく簡
易に内皮テープ３４を巻回することができ、内部導体３
０に内皮テープ３４を巻回して第１の導電性ゴム層３１
を被覆成形する工程を有する製造方法であっても、高歩
留まり、低コスト化を達成することができる。Further, in the conventional manufacturing method, in order to reduce the occurrence of the curling phenomenon and the entanglement of the inner sheath tape 34 during the extrusion injection of the insulating rubber, the inner sheath tape 34 is uniformly and controlled while controlling the tape tension. It was necessary to wind it around the internal conductor 30 without unevenness. And the winding operation of the inner skin tape 34 requires skill, lowering the yield,
High cost was brought. However, in the manufacturing method according to the first embodiment, the inner conductor tape 34 is
After being wound to zero, the semi-vulcanization step is performed prior to the step of extruding and pouring the insulating rubber.
The first conductive rubber layer 31 is wound around the inner conductive tape 34.
Even if the manufacturing method has a step of coating and molding, a high yield and low cost can be achieved.
【００１７】実施例２．上記実施例１では、固体絶縁物
層として絶縁性ゴムからなる絶縁性ゴム層３２を用いる
ものとしているが、この実施例２では、固体絶縁物層と
してエポキシ等の絶縁性樹脂からなる絶縁性樹脂層を用
い、機械的強度を高めた接続導体３を製造するものであ
る。Embodiment 2 FIG. In the first embodiment, the insulating rubber layer 32 made of insulating rubber is used as the solid insulating layer. In the second embodiment, the insulating resin made of insulating resin such as epoxy is used as the solid insulating layer. The purpose of this is to manufacture the connection conductor 3 having a higher mechanical strength by using a layer.
【００１８】この実施例２では、上記実施例１と同様
に、内部導体３０の両端に金型１０ａ，１０ｂをそれぞ
れ嵌着する。そして、金型１０ａ，１０ｂの外周面およ
び内部導体３０の露出する外周面に導電性ゴムからなる
未加硫の内皮テープ３４を螺旋状に隙間なく巻回する。
その後、内部導体３０および金型１０ａ，１０ｂの外周
面に巻回された内皮テープ３４を半加硫させる。つい
で、内皮テープ３４が巻回された内部導体３０を金型に
組み込み、押出機によりエポキシ等の絶縁性樹脂を金型
内に押し出し注入する。この時、絶縁性樹脂は内皮テー
プ３４の外周に注入される。その後、全体を加硫する。
そこで、内皮テープ３４が加硫されて内部導体３０の外
周面を被覆する第１の導電性ゴム層３１が成形され、絶
縁性樹脂が加硫されて第１の導電性ゴム層３１の外周面
を被覆する固体絶縁物層としての絶縁性樹脂層３６が成
形される。ついで、離型して、第１の導電体層３１およ
び高硬度の絶縁性樹脂層３６が被覆された内部導体３０
を得る。その後、絶縁性樹脂層３６の外周面に導電性材
料、例えば亜鉛を溶射し、絶縁性樹脂層３６の外周面を
覆うように第２の導電体層３７を被覆成形し、図２に示
されるように、内部導体３０の外周面上に第１の導電性
ゴム層３１、絶縁性樹脂層３６および第２の導電体層３
７が一体に積層形成された接続導体３を得る。In the second embodiment, similarly to the first embodiment, the molds 10a and 10b are fitted to both ends of the internal conductor 30, respectively. Then, an unvulcanized endothelial tape 34 made of conductive rubber is spirally wound around the outer peripheral surfaces of the molds 10a and 10b and the exposed outer peripheral surface of the internal conductor 30 without any gap.
Thereafter, the inner conductor tape 34 wound around the inner conductor 30 and the outer peripheral surfaces of the molds 10a and 10b is semi-vulcanized. Next, the inner conductor 30 around which the inner skin tape 34 is wound is incorporated into a mold, and an insulating resin such as epoxy is extruded and injected into the mold by an extruder. At this time, the insulating resin is injected into the outer periphery of the inner skin tape 34. Then, the whole is vulcanized.
Then, the inner conductive tape 34 is vulcanized to form a first conductive rubber layer 31 covering the outer peripheral surface of the inner conductor 30, and the insulating resin is vulcanized to form an outer peripheral surface of the first conductive rubber layer 31. Is formed as an insulating resin layer 36 as a solid insulator layer covering the substrate. Next, the mold is released, and the inner conductor 30 covered with the first conductor layer 31 and the high-hardness insulating resin layer 36 is removed.
Get. Thereafter, a conductive material, for example, zinc is sprayed on the outer peripheral surface of the insulating resin layer 36, and a second conductor layer 37 is formed so as to cover the outer peripheral surface of the insulating resin layer 36, as shown in FIG. As described above, the first conductive rubber layer 31, the insulating resin layer 36 and the second conductive layer 3
7 is obtained to form the connection conductor 3 integrally laminated.
【００１９】このように、この実施例２によれば、絶縁
性樹脂の押出注入に先立って内皮テープ３４を半加硫工
程を施しているので、絶縁性樹脂の押出注入時における
内皮テープ３４のメクレ現象、巻き込みあるいは断層の
発生を抑制でき、上記実施例１と同様の効果が得られ
る。また、固体絶縁物層としてエポキシからなる絶縁性
樹脂層３６を用いているので、固い固体絶縁物層が得ら
れ、機械的強度に優れた接続導体３が得られる。ここ
で、上記実施例２では、絶縁性樹脂としてエポキシを用
いるものとしているが、汎用プラスチックに比べて強
度、耐熱性等の諸特性に優れているエンジニアリング
プラスチックを絶縁性樹脂として用いてもよい。As described above, according to the second embodiment, since the semi-vulcanization step is performed on the inner sheath tape 34 prior to the extrusion injection of the insulating resin, the inner sheath tape 34 is extruded during the extrusion injection of the insulating resin. It is possible to suppress the occurrence of the screeching phenomenon, entangling or occurrence of a fault, and the same effects as in the first embodiment can be obtained. Further, since the insulating resin layer 36 made of epoxy is used as the solid insulator layer, a solid solid insulator layer is obtained, and the connection conductor 3 having excellent mechanical strength is obtained. Here, in Example 2 described above, epoxy is used as the insulating resin, but the engineering is superior in various properties such as strength and heat resistance as compared with general-purpose plastic.
Plastic may be used as the insulating resin.
【００２０】[0020]
【発明の効果】この発明は、以上のように構成されてい
るので、以下に記載されるような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２１】この発明の第１の発明によれば、未加硫の
導電性ゴム材からなる内皮テープを前記内部導体の外周
面を覆うように螺旋状に隙間なく巻回し、その後前記内
皮テープを半加硫する工程と、導電性ゴム材を筒状に成
形して外皮を形成する工程と、半加硫された前記内皮テ
ープが被覆された前記内部導体と前記外皮とを金型内に
配置し、前記内皮テープと前記外皮との間に絶縁性ゴム
を押出注入し、加硫して、前記内部導体の外周面上に前
記第１の導電体層、前記固体絶縁物層および前記第２の
導電体層を一体に積層形成する工程とを有しているの
で、熟練を要することなく内皮テープを巻回できるよう
になり、作業性を大幅に改善できるとともに、所定の絶
縁耐力が確保でき、経年的絶縁劣化を抑えられる固体絶
縁物被覆導体を安定して、高歩留まりで製造することが
できる。According to the first aspect of the present invention, the inner tape made of an unvulcanized conductive rubber material is spirally wound without any gap so as to cover the outer peripheral surface of the inner conductor. Semi-vulcanizing, forming a conductive rubber material into a cylindrical shape to form an outer cover, and disposing the inner conductor and the outer cover coated with the semi-vulcanized endothelial tape in a mold. Then, an insulating rubber is extruded and injected between the inner skin tape and the outer skin, and vulcanized to form the first conductor layer, the solid insulator layer, and the second conductor on the outer peripheral surface of the inner conductor. And the step of integrally laminating the conductor layers, so that the inner skin tape can be wound without requiring skill, and the workability can be greatly improved, and a predetermined dielectric strength can be secured. , Stable solid insulation coated conductor that can suppress aging deterioration Te, can be prepared in high yield.
【００２２】また、この発明の第２の発明によれば、未
加硫の導電性ゴム材からなる内皮テープを前記内部導体
の外周面を覆うように螺旋状に隙間なく巻回し、その後
前記内皮テープを半加硫する工程と、半加硫された前記
内皮テープが被覆された前記内部導体を金型内に配置
し、前記内皮テープの外周面に絶縁性樹脂を押出注入
し、加硫して、前記内部導体の外周面上に前記第１の導
電体層および前記固体絶縁物層を一体に積層形成する工
程と、離型して前記固体絶縁物層の外周面を覆うように
導電性材料を被覆して前記第２の導電体層を形成する工
程とを有しているので、上記第１の発明と同様の効果が
得られるとともに、機械的強度の優れた固体絶縁物被覆
導体を安定して、高歩留まりで製造することができる。Further, according to the second aspect of the present invention, an endothelial tape made of an unvulcanized conductive rubber material is spirally wound without any gap so as to cover the outer peripheral surface of the inner conductor. A step of semi-vulcanizing the tape, disposing the inner conductor coated with the semi-vulcanized endothelial tape in a mold, extruding and insulating an insulating resin on the outer peripheral surface of the endothelial tape, and vulcanizing. A step of integrally forming the first conductor layer and the solid insulator layer on the outer peripheral surface of the inner conductor; and a step of releasing the conductive layer so as to cover the outer peripheral surface of the solid insulator layer. Forming a second conductor layer by coating a material, so that the same effects as those of the first invention can be obtained, and a solid insulator-coated conductor having excellent mechanical strength can be obtained. It can be manufactured stably with a high yield.
【図１】 この発明の実施例１に係る固体絶縁物被覆導
体の製造方法を説明する工程フローである。FIG. 1 is a process flow illustrating a method for manufacturing a solid insulator-coated conductor according to Embodiment 1 of the present invention.
【図２】 この発明の実施例２に係る固体絶縁物被覆導
体の製造方法で製造された接続導体を示す断面図であ
る。FIG. 2 is a cross-sectional view illustrating a connection conductor manufactured by a method for manufacturing a solid insulator-coated conductor according to a second embodiment of the present invention.
【図３】 従来の固体絶縁開閉装置を示す背面図であ
る。FIG. 3 is a rear view showing a conventional solid insulated switchgear.
【図４】 従来の接続導体を示す断面図である。FIG. 4 is a cross-sectional view showing a conventional connection conductor.
【図５】 従来の固体絶縁物被覆導体の製造方法を説明
する工程フローである。FIG. 5 is a process flow illustrating a conventional method for manufacturing a solid insulator-coated conductor.
【図６】 従来の固体絶縁物被覆導体の製造方法におけ
る不具合を説明する接続導体の断面図である。FIG. 6 is a cross-sectional view of a connection conductor for explaining a problem in a conventional method of manufacturing a solid insulator-coated conductor.
【図７】 従来の固体絶縁物被覆導体の製造方法におけ
る不具合を説明する接続導体の要部断面図である。FIG. 7 is a cross-sectional view of a main part of a connection conductor for explaining a problem in a conventional method for manufacturing a solid insulator-coated conductor.
３ 接続導体（固体絶縁物被覆導体）、３０ 内部導
体、３１ 第１の導電性ゴム層（第１の導電体層）、３
２ 絶縁性ゴム層（固体絶縁物層）、３３ 第２の導電
性ゴム層（第２の導電体層）、３４ 内皮テープ、３５
外皮、３６ 絶縁性樹脂層（固体絶縁物層）、３７
第２の導電体層。3 connection conductor (solid insulator covered conductor), 30 internal conductor, 31 first conductive rubber layer (first conductor layer), 3
2 insulating rubber layer (solid insulator layer), 33 second conductive rubber layer (second conductor layer), 34 endothelial tape, 35
Outer skin, 36 Insulating resin layer (solid insulator layer), 37
A second conductor layer;
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−52510（ＪＰ，Ａ) 特公 昭49−12062（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H02G 15/00 H01R 43/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-52510 (JP, A) JP-B-49-12062 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) H02G 15/00 H01R 43/00
Claims (2)
面を覆うように被覆成形された第１の導電体層と、前記
第１の導電体層の外周面を覆うように被覆成形された固
体絶縁物層と、前記固体絶縁物層の外周面を覆うように
被覆成形された第２の導電体層とを備えた固体絶縁物被
覆導体の製造方法において、 未加硫の導電性ゴム材からなる内皮テープを前記内部導
体の外周面を覆うように螺旋状に隙間なく巻回し、その
後前記内皮テープを半加硫する工程と、 導電性ゴム材を筒状に成形して外皮を形成する工程と、 半加硫された前記内皮テープが被覆された前記内部導体
と前記外皮とを金型内に配置し、前記内皮テープと前記
外皮との間に絶縁性ゴムを押出注入し、加硫して、前記
内部導体の外周面上に前記第１の導電体層、前記固体絶
縁物層および前記第２の導電体層を一体に積層形成する
工程とを有することを特徴とする固体絶縁物被覆導体の
製造方法。1. A column-shaped internal conductor, a first conductor layer formed to cover an outer peripheral surface of the inner conductor, and a cover member formed to cover an outer peripheral surface of the first conductor layer. A method of manufacturing a solid insulator-coated conductor comprising: a solid insulator layer; and a second conductor layer formed to cover an outer peripheral surface of the solid insulator layer. A step of spirally winding an inner skin tape made of a material so as to cover the outer peripheral surface of the inner conductor without any gap, and then semi-vulcanizing the inner skin tape; forming a conductive rubber material into a cylindrical shape to form an outer skin Placing the inner conductor covered with the semi-vulcanized endothelial tape and the outer cover in a mold, extruding insulating rubber between the inner cover and the outer cover, and vulcanizing. The first conductor layer and the solid insulator on the outer peripheral surface of the inner conductor. And a step of integrally laminating the layer and the second conductor layer.
面を覆うように被覆成形された第１の導電体層と、前記
第１の導電体層の外周面を覆うように被覆成形された固
体絶縁物層と、前記固体絶縁物層の外周面を覆うように
被覆成形された第２の導電体層とを備えた固体絶縁物被
覆導体の製造方法において、 未加硫の導電性ゴム材からなる内皮テープを前記内部導
体の外周面を覆うように螺旋状に隙間なく巻回し、その
後前記内皮テープを半加硫する工程と、 半加硫された前記内皮テープが被覆された前記内部導体
を金型内に配置し、前記内皮テープの外周面に絶縁性樹
脂を押出注入し、加硫して、前記内部導体の外周面上に
前記第１の導電体層および前記固体絶縁物層を一体に積
層形成する工程と、 離型して前記固体絶縁物層の外周面を覆うように導電性
材料を被覆して前記第２の導電体層を形成する工程とを
有することを特徴とする固体絶縁物被覆導体の製造方
法。2. A column-shaped internal conductor, a first conductor layer formed to cover an outer peripheral surface of the inner conductor, and a cover member formed to cover an outer peripheral surface of the first conductor layer. A method of manufacturing a solid insulator-coated conductor comprising: a solid insulator layer; and a second conductor layer formed to cover an outer peripheral surface of the solid insulator layer. Spirally winding an inner skin tape made of a material so as to cover the outer peripheral surface of the inner conductor without gap, and then semi-vulcanizing the inner skin tape; and A conductor is placed in a mold, and an insulating resin is extruded and injected into the outer peripheral surface of the inner sheath tape, vulcanized, and the first conductor layer and the solid insulator layer are formed on the outer peripheral surface of the inner conductor. Forming a single layer, and releasing the mold to cover the outer peripheral surface of the solid insulator layer. Forming the second conductor layer by coating a conductive material as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13810395A JP3154643B2 (en) | 1995-06-05 | 1995-06-05 | Method for manufacturing solid insulator coated conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13810395A JP3154643B2 (en) | 1995-06-05 | 1995-06-05 | Method for manufacturing solid insulator coated conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08331744A JPH08331744A (en) | 1996-12-13 |
| JP3154643B2 true JP3154643B2 (en) | 2001-04-09 |
Family
ID=15214025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13810395A Expired - Fee Related JP3154643B2 (en) | 1995-06-05 | 1995-06-05 | Method for manufacturing solid insulator coated conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3154643B2 (en) |
-
1995
- 1995-06-05 JP JP13810395A patent/JP3154643B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08331744A (en) | 1996-12-13 |
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