JPS5810384A - Method of forming connector of insulated cable - Google Patents
Method of forming connector of insulated cableInfo
- Publication number
- JPS5810384A JPS5810384A JP56106694A JP10669481A JPS5810384A JP S5810384 A JPS5810384 A JP S5810384A JP 56106694 A JP56106694 A JP 56106694A JP 10669481 A JP10669481 A JP 10669481A JP S5810384 A JPS5810384 A JP S5810384A
- Authority
- JP
- Japan
- Prior art keywords
- insulated cable
- melt index
- cable
- mold
- insulating material
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はゴムまたはプラスチックの絶縁ケーブルの接続
部の形成方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming connections in rubber or plastic insulated cables.
ゴムまたはプラスチックの絶縁層を有するケーブルはし
ばしば接続して使用されるが、接続による電気的特性の
劣化は、特に極めて高い電圧に対してそれが使用される
場合Ｋｇ犬な問題となる。Cables with rubber or plastic insulation layers are often used in splices, but the deterioration of the electrical properties due to splices is a serious problem, especially when they are used for very high voltages.
この問題を解決するために、その接続部は従来において
はケーブル端部の導体を露出し、その導体を適当に接続
した後にその導体接続部上に内部半導電層および補強用
の絶縁層を設け、これを加圧下で加熱することによりケ
ーブルの絶縁層とこの補強絶縁層を一体化して形成され
ている。この絶縁層はケーブルの電気的特性を損うこと
のないように、そして接続部自体の寸法を出来るだけ小
さく出来るように、ケーブルの絶縁材料と同一またはそ
れに類似する材料を用いてモールドにより形成されるの
が一般的である。To solve this problem, the connection is conventionally made by exposing the conductor at the end of the cable, and after the conductor is properly connected, an internal semiconducting layer and a reinforcing insulating layer are provided over the conductor connection. By heating this under pressure, the insulating layer of the cable and this reinforcing insulating layer are integrated. This insulating layer is formed by molding using a material that is the same as or similar to the insulating material of the cable, so as not to impair the electrical properties of the cable and to make the dimensions of the connection part itself as small as possible. It is common to
そのような絶縁材料を用いてのモールドは接続部の電気
的特性の安定性などから、一般に導体接続部上に内部半
導電層を例えば半導電性テープを巻回するかあるいは半
導電性熱収縮チューブを加熱収縮させて設けたものを金
型内に配置し、金型を所定温度まで予熱した後、例えば
押出機により、適当な温度に加熱された絶縁材料を注入
し成形して行われる。Molds using such insulating materials are generally made by wrapping an internal semiconducting layer on the conductor connection part, such as by wrapping a semiconducting tape or semiconducting heat shrink material, in order to ensure the stability of the electrical properties of the connection part. A heat-shrinkable tube is placed in a mold, the mold is preheated to a predetermined temperature, and then an insulating material heated to an appropriate temperature is injected into the mold using an extruder, for example.
このような従来技術において、押出機により押出される
絶縁材料は一般に粘性が高く押し出したかなりの力が必
要であり、また、これら絶縁材料により覆われろケーブ
ル要素の１表面とこの材料との界面においてその接着性
に問題が残されている。In such prior art, the insulating materials extruded by the extruder are generally highly viscous and require considerable extrusion force, and the interface between this material and one surface of the cable element covered by these insulating materials is However, there remains a problem with its adhesion.
本発明の目的は絶縁利料の押出しが容易であり且つ絶縁
ケーブルの諸要素との接着性のすぐれた絶縁ケーブルの
接続部、の形成方法を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for forming a connection part of an insulated cable in which the extrusion of the insulation material is easy and the connection part of the insulated cable has excellent adhesion to various elements of the insulated cable.
本発明によれば上記目的は絶縁ケーブルの導体接続部を
金型内に配置した後の絶縁拐料の押出し注入に際し、は
じめにメルトインデックスが比較続部に吹付けて薄層を
形成させて比較的この材料°により少くともケーブルの
諸要素がこの材料により覆われるようにし、次いで比較
的にメルトインデックスが高い状態でその材料を押し出
し注入して接続部の成形を行うことにより達成される。According to the present invention, the above-mentioned object is achieved by first spraying the melt index onto the comparison connection part to form a relatively thin layer when extruding the insulation material after the conductor connection part of the insulated cable is placed in the mold. This is achieved by covering at least the cable elements with this material and then extruding and injecting the material at a relatively high melt index to form the connection.
以下図面にもとづぎ架橋化ポリエチレン絶縁ケーブル（
以下Ｃ■ケーブルという）を例にとった場合の本発明の
一実施例を説明する。Based on the drawings below, cross-linked polyethylene insulated cable (
An embodiment of the present invention will be described using a cable (hereinafter referred to as C.sub.2 cable) as an example.
第１図は本発明の方法を実施するだめの装置の一例の概
略部分断面図であり、同図においてＣＶケーブル１の端
部を適当に加工し導体を露出されこれら導体を導体接続
管を用いて接続し、その上に半導電性ポリオレフィン内
部半導電層２を形成する。そして更にケーブル接続部に
メルトインデックスが０．６〜３．５ （９／ １０ｍ
１ｎ）のポリオレフィン絶縁材料を吹付けて薄層１０を
形成しこのようにして形成された接続部を金型ろ、４内
に配置する。FIG. 1 is a schematic partial sectional view of an example of an apparatus for carrying out the method of the present invention, in which the ends of a CV cable 1 are suitably processed to expose conductors, and these conductors are connected using conductor connection tubes. A semiconductive polyolefin inner semiconductive layer 2 is formed thereon. Furthermore, the melt index at the cable connection part is 0.6 to 3.5 (9/10m
A thin layer 10 is formed by spraying the polyolefin insulating material 1n) and the connections thus formed are placed in the mold filter 4.
下側金型ろには分離および切換装置５を介して押出機６
が接続しており、更に架橋剤の注入装置７が適当に接続
されている。An extruder 6 is connected to the lower mold filter via a separating and switching device 5.
are connected, and furthermore, a crosslinking agent injection device 7 is appropriately connected.
上側金型４は複数のオーバーフロ一孔９およびオーバー
フロー分により充填されるラム８が設けである。The upper mold 4 is provided with a plurality of overflow holes 9 and a ram 8 filled with the overflow.
内部に接続部を収納した金型３，４は適当な加熱装置（
図示せず）により所定温度に加熱された後に押出機６に
よりメルトインデックスが５．０（、ｆｉ’７１０ｍ１
ｎ）以上のポリオレフィン絶縁材料を押出し注入する。The molds 3 and 4, which house the connecting parts inside, are heated with a suitable heating device (
After being heated to a predetermined temperature by the extruder 6 (not shown), the melt index is 5.0 (, fi'710m1
n) Extrusion injection of the above polyolefin insulation material.
このメルトインデックスの大きい材料の押出注入の際に
架橋剤（有機過酸化物）を注入装置７により添加する。A crosslinking agent (organic peroxide) is added by the injection device 7 during extrusion injection of this material with a large melt index.
メルトインデックスの高い材料の注入により金型内部の
充填が完了するとオー、バーフロ一孔９から余剰分が流
出し、禿れと共にラム８内にもこの材料が入る。この状
態で絶縁材料の押出機による注入が停止され、それと同
時にラム８により圧力を加えて架橋を行わせた後金型の
全部を行い、ケーブル接続部を形成する。When the filling of the inside of the mold is completed by injecting the material with a high melt index, the excess material flows out from the barflow hole 9 and enters the ram 8 along with the baldness. In this state, the injection of the insulating material by the extruder is stopped, and at the same time, pressure is applied by the ram 8 to effect crosslinking, and then the entire mold is formed to form the cable connection part.
このようにすることにより、メルトインデックスの低い
材料がケーブルの絶縁体とメルトインデックスの高い材
料と界面に存在してその接着性を向上させ架橋が容易と
なり、且つ押出し自体が容易になる。By doing so, the material with a low melt index is present at the interface between the cable insulator and the material with a high melt index, improving their adhesion, facilitating crosslinking, and facilitating extrusion itself.
以上Ｃ■ケーブルについて本発明の詳細な説明したがＣ
Ｖケーブルに限らず、本発明の方法はゴムまたはプラス
チック絶縁ケーブルに任意に適用可能である。Above is a detailed explanation of the present invention regarding the C cable.
Not limited to V-cables, the method of the invention is optionally applicable to rubber or plastic insulated cables.
第１図は本発明の方法を実施するための装置の一例を示
す概略部分断面図である。
１−ｍ−絶縁ケーブル ２−ｍ−導体接続部３．４−−
一金型 ５−ｍ−分離切換装置 ６一−−押出機 ７−
−−架橋剤注入装置 ８−ｍ−ラム ９−ｍ−オーバー
フロ一孔 １０−一一低メルトインデックス材料の薄層FIG. 1 is a schematic partial sectional view showing an example of an apparatus for carrying out the method of the present invention. 1-m-insulated cable 2-m-conductor connection section 3.4--
One mold 5-m-separation switching device 6--extruder 7-
--Crosslinker injection device 8-m-ram 9-m-overflow one hole 10-11 thin layer of low melt index material
Claims (1)
を所定温度で金型を用いて押し出し成形して絶縁ケーブ
ルの接続部を形成する方法において、比較的低いメルト
インデックスを有する状態とした上記絶縁材料を予め上
記接続部の周囲に吹付けて薄層を形成させ、しかる後に
比較的高いメルトインデックスを有する状態とした上記
絶縁材料を上記金型に押出し注入して成形することを特
徴とするゴムまたはプラスチックの絶縁ケーブルの接続
部の形成方法。 ２、＃Ｊ記絶縁ケーブルは架橋化ポリエチレン絶縁ケー
ブルであり、前記絶縁材料はポリオレフィンであって邑
初の注入におけるメルトインデックスが０．６乃至３．
５１１７１０ ｍｉｎ であり、次の注入におけるメル
トインデックスが５．０１７１０ｍ１ｎ以上であること
を特徴とする特許請求の範囲第１項記載の絶縁ケーブル
の接続部の形成方法。[Claims] 1. A method of forming a connection part of an insulated cable by extruding an insulating material the same as or similar to the insulator of the insulated cable using a mold at a predetermined temperature, which has a relatively low melt index. The insulating material in a state is sprayed in advance around the connection portion to form a thin layer, and then the insulating material in a state having a relatively high melt index is extruded into the mold and molded. A method of forming a connection part of a rubber or plastic insulated cable, characterized by: 2. The insulated cable #J is a crosslinked polyethylene insulated cable, and the insulating material is polyolefin, and the melt index at the time of initial injection is 0.6 to 3.
511710 min, and the melt index in the next injection is 5.01710 m1n or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106694A JPS6023476B2 (en) | 1981-07-08 | 1981-07-08 | Method for forming connections of insulated cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106694A JPS6023476B2 (en) | 1981-07-08 | 1981-07-08 | Method for forming connections of insulated cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5810384A true JPS5810384A (en) | 1983-01-20 |
| JPS6023476B2 JPS6023476B2 (en) | 1985-06-07 |
Family
ID=14440135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56106694A Expired JPS6023476B2 (en) | 1981-07-08 | 1981-07-08 | Method for forming connections of insulated cables |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023476B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS644335A (en) * | 1987-06-26 | 1989-01-09 | Fujikura Ltd | Connecting method of crosslinked polyolefin power cable |
| US6065988A (en) * | 1996-03-14 | 2000-05-23 | Yazaki Corporation | Electrical module mounting structure |
-
1981
- 1981-07-08 JP JP56106694A patent/JPS6023476B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS644335A (en) * | 1987-06-26 | 1989-01-09 | Fujikura Ltd | Connecting method of crosslinked polyolefin power cable |
| US6065988A (en) * | 1996-03-14 | 2000-05-23 | Yazaki Corporation | Electrical module mounting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6023476B2 (en) | 1985-06-07 |
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