JPH0362477A - Method of crosslinking mold insulator of cable connecting part - Google Patents
Method of crosslinking mold insulator of cable connecting partInfo
- Publication number
- JPH0362477A JPH0362477A JP19846889A JP19846889A JPH0362477A JP H0362477 A JPH0362477 A JP H0362477A JP 19846889 A JP19846889 A JP 19846889A JP 19846889 A JP19846889 A JP 19846889A JP H0362477 A JPH0362477 A JP H0362477A
- Authority
- JP
- Japan
- Prior art keywords
- crosslinking
- mold insulator
- insulator
- cable
- cross
- 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.)
- Granted
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 51
- 238000004132 cross linking Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 14
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 8
- 239000011261 inert gas Substances 0.000 claims abstract description 8
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 239000003431 cross linking reagent Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229920002050 silicone resin Polymers 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
本発明は、ケーブル接続部のモールド絶縁体を表面の酸
化劣化等を引起こすことなく架橋するケーブル接続部の
モールド絶縁体の架橋方法に関する。[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention provides a molded insulator for a cable connecting portion that crosslinks the molded insulator for a cable connecting portion without causing surface oxidation deterioration, etc. The present invention relates to a crosslinking method.
（従来の技術）
従来から、Ｃｖケーブル（架橋ポリエチレン絶縁ケーブ
ル）のようなゴム、プラスチック絶縁ケーブルのモール
ド部を加熱架橋する場合には、次のような方法が行なわ
れていた。(Prior Art) Conventionally, when heating and crosslinking a molded portion of a rubber or plastic insulated cable such as a Cv cable (crosslinked polyethylene insulated cable), the following method has been used.
すなわち、まず第２図に示すように、導体接続部１上に
両側のケーブル２の絶縁体３上に跨がって、架橋用過酸
化物を配合したポリオレフィン樹脂等からなる架橋可能
な絶縁テープを巻回したり、金型を被嵌して押出し成形
したりして、紡錘状のモールド絶縁体４を形成した後、
このモールド絶縁体４の外周に、ポリエステル樹脂テー
プや金属テープのような機械的強度の大きい耐熱性テー
プを巻回することによって、形状維持のための支持体５
を形成し、次いでこれら全体を加熱ヒータ６が内蔵され
た架橋釜７の中に挿入する。That is, as shown in FIG. 2, a crosslinkable insulating tape made of a polyolefin resin or the like containing a crosslinking peroxide is first placed on the conductor connection part 1 and over the insulator 3 of the cable 2 on both sides. After forming a spindle-shaped molded insulator 4 by winding it or fitting it into a mold and extruding it,
By wrapping a heat-resistant tape with high mechanical strength such as a polyester resin tape or a metal tape around the outer periphery of the molded insulator 4, a support 5 is formed to maintain the shape.
is formed, and then the whole is inserted into a crosslinking pot 7 in which a heater 6 is built-in.
しかる後、架橋釜７上部に取付けられた排出パルプ８を
若干開きながら、ボンベ９から加圧空気を釜内に圧入充
填し、釜内に常に加圧空気を流動させた状態で加熱ヒー
タ６を作動させて、モールド絶縁体４を加熱架橋させる
。After that, while slightly opening the discharge pulp 8 attached to the top of the crosslinking pot 7, pressurized air is injected into the pot from the cylinder 9, and the heater 6 is turned on while the pressurized air is constantly flowing in the pot. It is activated to thermally crosslink the mold insulator 4.
（発明が解決しようとする課題）
しかしながら、このような従来の架橋方法においては、
架橋釜７の内部に充填された加圧空気中の酸素によって
、ポリオレフィン樹脂テープからなるモールド絶縁体４
の表面が酸化され劣化が生じやすくなるという問題があ
った。(Problem to be solved by the invention) However, in such conventional crosslinking methods,
The molded insulator 4 made of polyolefin resin tape is heated by oxygen in the pressurized air filled inside the crosslinking pot 7.
There was a problem in that the surface was oxidized and deteriorated easily.
またモールド絶縁体４の外周に被覆された気密性の支持
体５によって、モールド絶縁体４中に生じた架橋用過酸
化物の分解残渣の揮散、放出が妨げられるため、モール
ド絶縁体４中の水分量等が増加し絶縁性能が低下すると
いう問題があった。In addition, the airtight support 5 covering the outer periphery of the mold insulator 4 prevents the volatilization and release of the decomposition residue of the crosslinking peroxide generated in the mold insulator 4. There was a problem in that the amount of moisture etc. increased and the insulation performance deteriorated.
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、モールド絶縁体表面の酸化が防止され、しかも架橋
剤分解残渣の放出が妨げられることのない、ケーブル接
続部のモールド絶縁体の架橋方法を提供することを目的
とする。The present invention was made in order to solve these problems, and the present invention has been made to cross-link the mold insulator at the cable connection part, which prevents oxidation of the mold insulator surface and does not prevent the release of cross-linking agent decomposition residue. The purpose is to provide a method.
［発明の構成コ
（課題を解決するための手段）
本発明のケーブル接続部のモールド絶縁体の架橋方法は
、ケーブルの導体接続部上に両ケーブルのケーブル絶縁
体に跨がって形成された架橋可能なモールド絶縁体の外
周にガス透過性の良好な耐熱支持層を被覆し、これを加
熱手段を備えた架橋釜に収容し、次いで前記架橋釜内の
空気を高圧不活性ガスで置換して、前記モールド絶縁体
を前記不活性ガスによって加圧しながら加熱架橋するこ
とを特徴としている。[Structure of the Invention (Means for Solving the Problems) The method of bridging the molded insulator of the cable connection part of the present invention provides a method for bridging the molded insulator of the cable connection part of the cable. The outer periphery of the crosslinkable molded insulator is coated with a heat-resistant support layer having good gas permeability, and this is placed in a crosslinking pot equipped with a heating means, and then the air in the crosslinking pot is replaced with a high-pressure inert gas. The method is characterized in that the molded insulator is crosslinked by heating while being pressurized by the inert gas.
本発明におけるモールド絶縁体を形成するには、例えば
、ポリエチレン、ポリプロピレン、エチレン−プロピレ
ン共重合体、エチレン−酢酸ビニル共重合体（ＥＶＡ）
、エチレン−アクリル酸エチル共重合体（ＥＥＡ）の
ようなポリオレフィンに、ジクミルパーオキサイド（Ｄ
ＣＰ） 、ｔ−ブチルパーオキサイドのような架橋用過
酸化物を配合しまた組成物を、テープ状に成形してなる
絶縁テープを、ケーブルの導体接続部上に紡錘状に巻回
したり、あるいは金型を用いて上記組成物を導体接続部
上に紡錘状に押出し成形する方法等を採ることができる
。To form the mold insulator in the present invention, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA) is used.
, dicumyl peroxide (D
CP), an insulating tape prepared by blending a crosslinking peroxide such as t-butyl peroxide and forming the composition into a tape shape is wound in a spindle shape on the conductor connection part of the cable, or A method may be adopted in which the above composition is extruded into a spindle shape onto the conductor connection portion using a mold.
またこのように形成されたモールド絶縁体の外周に、支
持および押えのために被覆するガス透過性の良好な耐熱
支持層としては、シリコーン樹脂またはシリコーンゴム
のようなガス透過性が良い耐熱性プラスチックからなる
熱収縮性チューブが適している。In addition, as a heat-resistant support layer with good gas permeability that is coated around the outer periphery of the molded insulator formed in this way for supporting and holding down, a heat-resistant plastic with good gas permeability such as silicone resin or silicone rubber can be used. A heat-shrinkable tube made of is suitable.
（作用）
本発明のケーブル接続部のモールド絶縁体の架橋方法に
おいては、ケーブル導体接続部上に設けられた架橋可能
なモールド絶縁体が、内部の空気が減圧吸引され不活性
ガスが充填された架橋釜内で加熱架橋されるので、モー
ルド絶縁体の表面が酸化劣化されることがない。(Function) In the method of crosslinking a molded insulator of a cable connection part of the present invention, the crosslinkable molded insulator provided on the cable conductor connection part is filled with an inert gas by vacuum suctioning of internal air. Since crosslinking is carried out by heating in the crosslinking pot, the surface of the mold insulator is not deteriorated by oxidation.
またモールド絶縁体の外周にガス透過性の良好な耐熱支
持層が被覆されているので、モールド絶縁体中に生じた
架橋用過酸化物の分解残渣が、この支持層を透過して絶
縁体外へ速やかに放出揮散される。In addition, since the outer periphery of the mold insulator is coated with a heat-resistant support layer with good gas permeability, decomposition residue of crosslinking peroxide generated in the mold insulator passes through this support layer and exits the insulator. It is quickly released and volatilized.
したがって通電使用中にモールド絶縁体中の水分量等が
増加することがな（、水トリーなとの発生に起因する経
時的な絶縁性能の低下が生じることがない。Therefore, the moisture content in the molded insulator does not increase during energized use (and the insulation performance does not deteriorate over time due to water tree formation).
（実施例） 以下、本発明の実施例について説明する。(Example) Examples of the present invention will be described below.
この実施例においては、第１図に示すように、まず端部
を突き合わせて配置した一対のゴム、プラスチック絶縁
ケーブル１０の導体１１を、導体接続スリーブ等を介し
て接続した後、この導体接続部１２上に、両側のケーブ
ル絶縁体１３上に跨がって、架橋用過酸化物が配合され
た架橋可能なポリオレフィン樹脂テープを巻回し、紡錘
状のモールド絶縁体１４を形成する。In this embodiment, as shown in FIG. 1, first, the conductors 11 of a pair of rubber and plastic insulated cables 10 are arranged with their ends butted together through a conductor connection sleeve, and then the conductor connection A crosslinkable polyolefin resin tape containing a crosslinking peroxide is wound over the cable insulators 13 on both sides to form a spindle-shaped mold insulator 14.
次いでこのモールド絶縁体１４の外周に、両側のケーブ
ル絶縁体１３上に跨がって、予め被嵌しておいたガス透
過性の良好なシリコーン樹脂等からなる熱収縮性チュー
ブ１５を被せて加熱収縮させ、接続部支持および形状維
持のための層を形成した後、これらを、上下内周面にそ
れぞれ加熱ヒータ１６が取付けられた架橋釜１７中に挿
入する。Next, a heat-shrinkable tube 15 made of silicone resin with good gas permeability, which has been fitted in advance, is placed over the outer periphery of the molded insulator 14, spanning over the cable insulators 13 on both sides, and heated. After shrinking to form a layer for supporting the connecting portion and maintaining the shape, these are inserted into a bridging pot 17 having heaters 16 attached to the upper and lower inner peripheral surfaces, respectively.
そして架橋釜１７の上部に取付けられた排出バルブ１８
を閉じた後、ロータリータイプの真空ポンプ１９によっ
て圧力が数ＴＯｒｒになるまで架橋釜１７内の空気を減
圧吸引し、次いで導入バルブ２０を開きボンベ２１から
窒素ガスを圧入充填し、架橋釜１７内部を一定の圧力に
加圧する。And a discharge valve 18 attached to the top of the bridging pot 17
After closing, the air inside the cross-linking pot 17 is vacuumed by a rotary type vacuum pump 19 until the pressure reaches several Torr, and then the introduction valve 20 is opened and nitrogen gas is press-filled from the cylinder 21, and the inside of the cross-linking pot 17 is Pressurize to a constant pressure.
しかる後、加熱ヒータ１６を作動させて釜内を適当な温
度に加熱することによって、モールド絶縁体１４を架橋
する。Thereafter, the mold insulator 14 is crosslinked by activating the heater 16 to heat the inside of the pot to an appropriate temperature.
この実施例の架橋方法においては、架橋釜１７内の空気
が真空ポンプ１つによって減圧吸引され、反応性が極め
て低い高圧の窒素ガスで置換されているので、モールド
絶縁体１４の表面が酸化されることがなく、シたがって
酸化に由来する劣化も生じない。In the crosslinking method of this embodiment, the air in the crosslinking pot 17 is sucked under reduced pressure by one vacuum pump and replaced with high pressure nitrogen gas with extremely low reactivity, so that the surface of the mold insulator 14 is not oxidized. Therefore, no deterioration due to oxidation occurs.
また架橋用過酸化物の分解によってモールド絶縁体１４
中に生じた残渣が、このシリコーン樹脂等の熱収縮性チ
ューブ１５を透過して容易に外部へ放出されるので、こ
れらの分解残渣に起因する絶縁性能の低下も生じない。In addition, the mold insulator 14 is decomposed by the crosslinking peroxide.
Since the residue generated therein passes through the heat-shrinkable tube 15 made of silicone resin or the like and is easily released to the outside, there is no deterioration in insulation performance due to these decomposition residues.
また架橋釜１７内に放出された架橋剤分解残渣は、排出
バルブ１８を開きかつ窒素ガスの圧入を続けることによ
って、容易に釜外に排出され、再びモールド絶縁体１４
内に取込まれることがない。Further, the crosslinking agent decomposition residue released into the crosslinking pot 17 is easily discharged out of the pot by opening the discharge valve 18 and continuing to pressurize nitrogen gas, and returns to the mold insulator 14.
It cannot be taken into the body.
［発明の効果］
以上説明したように本発明の架橋方法によれば、モール
ド絶縁体の表面が酸化され劣化が生じることがなく、特
性の良好なケーブル接続部のモールド絶縁体が形成され
る。[Effects of the Invention] As explained above, according to the crosslinking method of the present invention, the surface of the molded insulator is not oxidized and deteriorated, and a molded insulator of the cable connection portion with good characteristics is formed.
またこのようなモールド絶縁体中に生じた、架橋用過酸
化物の分触残渣や分解生成物である水が速やかに外部へ
揮散放出されるので、絶縁性能の良好なモールド絶縁体
が得られる。In addition, the dispersion residue of the crosslinking peroxide and water that is a decomposition product generated in such a molded insulator are quickly volatilized and released to the outside, so a molded insulator with good insulation performance can be obtained. .
第１図は、本発明の実施例のモールド絶縁体の架橋方法
を説明するための断面図、第２図は、従来のモールド絶
縁体の架橋方法を説明するための断面図である。
１０・・・・・・・・・ケーブル
１２・・・・・・・・・導体接続部
１４・・・・・・・・・モールド絶縁体５・・・・・・
・・・シリコーン樹脂等の熱収縮性チューブ
６・・・・・・・・・加熱ヒータ
７・・・・・・・・・架橋釜
９・・・真空ポンプ
ト・・窒素ガスボンベFIG. 1 is a cross-sectional view for explaining a method of cross-linking a mold insulator according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view for explaining a conventional method of cross-linking a mold insulator. 10...Cable 12...Conductor connection part 14...Mold insulator 5...
Heat-shrinkable tube of silicone resin etc. 6 Heater 7 Crosslinking pot 9 Vacuum pump Nitrogen gas cylinder
Claims (1)
絶縁体に跨がって形成された架橋可能なモールド絶縁体
の外周にガス透過性の良好な耐熱支持層を被覆し、これ
を加熱手段を備えた架橋釜に収容し、次いで前記架橋釜
内の空気を高圧不活性ガスで置換して、前記モールド絶
縁体を前記不活性ガスによって加圧しながら加熱架橋す
ることを特徴とするケーブル接続部のモールド絶縁体の
架橋方法。(1) A heat-resistant supporting layer with good gas permeability is coated on the outer periphery of a cross-linkable molded insulator formed over the cable insulators of both cables on the conductor connection part of the cable, and this is used as a heating means. The cable connection section is housed in a cross-linking pot equipped with a cross-linking pot, and then the air in the cross-linking pot is replaced with a high-pressure inert gas, and the molded insulator is heated and cross-linked while being pressurized by the inert gas. cross-linking method for molded insulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1198468A JP2892384B2 (en) | 1989-07-31 | 1989-07-31 | Method of bridging mold insulator at cable connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1198468A JP2892384B2 (en) | 1989-07-31 | 1989-07-31 | Method of bridging mold insulator at cable connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0362477A true JPH0362477A (en) | 1991-03-18 |
| JP2892384B2 JP2892384B2 (en) | 1999-05-17 |
Family
ID=16391611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1198468A Expired - Lifetime JP2892384B2 (en) | 1989-07-31 | 1989-07-31 | Method of bridging mold insulator at cable connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2892384B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100310430B1 (en) * | 1997-09-05 | 2002-05-09 | 루이스 에이. 헥트 | Ic socket |
| JP2012039703A (en) * | 2010-08-05 | 2012-02-23 | Viscas Corp | Bridge method of reinforcement insulation layers and bridge device of reinforcement insulation layers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121288A (en) * | 1979-03-13 | 1980-09-18 | Showa Electric Wire & Cable Co | Method of mold connecting rubber plastic insulated cable |
| JPS6286681A (en) * | 1985-10-08 | 1987-04-21 | 住友電気工業株式会社 | Molding method for cross-linked polyethylene insulated power cable connections |
-
1989
- 1989-07-31 JP JP1198468A patent/JP2892384B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55121288A (en) * | 1979-03-13 | 1980-09-18 | Showa Electric Wire & Cable Co | Method of mold connecting rubber plastic insulated cable |
| JPS6286681A (en) * | 1985-10-08 | 1987-04-21 | 住友電気工業株式会社 | Molding method for cross-linked polyethylene insulated power cable connections |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100310430B1 (en) * | 1997-09-05 | 2002-05-09 | 루이스 에이. 헥트 | Ic socket |
| JP2012039703A (en) * | 2010-08-05 | 2012-02-23 | Viscas Corp | Bridge method of reinforcement insulation layers and bridge device of reinforcement insulation layers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2892384B2 (en) | 1999-05-17 |
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