JPS63116315A - Manufacture of watertight insulated wire - Google Patents
Manufacture of watertight insulated wireInfo
- Publication number
- JPS63116315A JPS63116315A JP61263027A JP26302786A JPS63116315A JP S63116315 A JPS63116315 A JP S63116315A JP 61263027 A JP61263027 A JP 61263027A JP 26302786 A JP26302786 A JP 26302786A JP S63116315 A JPS63116315 A JP S63116315A
- Authority
- JP
- Japan
- Prior art keywords
- watertight
- conductor
- insulator
- compound
- watertight compound
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 45
- 239000004020 conductor Substances 0.000 claims description 34
- 239000012212 insulator Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 8
- 238000011282 treatment Methods 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 description 9
- 239000004800 polyvinyl chloride Substances 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 3
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、架空絶縁電線等として使用される水密コンパ
ウンドを撚線導体中に充填させたビニル絶縁電線の製造
方法に係り、特に、水密性の向上と剥離時の皮剥性の改
善を図った絶縁電線の製造方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for manufacturing vinyl insulated wires in which stranded conductors are filled with a watertight compound used as overhead insulated wires, and in particular, to improve watertightness. The present invention relates to a method for manufacturing an insulated wire that improves the properties of the insulated wire and improves the peelability during peeling.
〈従来の技術〉
架空配線用の絶縁電線としては、従来、撚線導体上にポ
リエチレン、ポリ塩化ビニル絶縁体を被覆したものがあ
るが、この構造の場合、雨水等が電線内部に浸入し滞留
することによって、導体部分で応力腐食が生ずるため、
その改良型として、撚線導体中に水密コンパウンドを充
填して、雨水等の浸入を防いだ所謂、水密絶縁電線が提
案されている。<Prior art> Insulated wires for overhead wiring have conventionally been made by coating a stranded conductor with polyethylene or polyvinyl chloride insulators, but with this structure, rainwater, etc. can enter and accumulate inside the wires. As a result, stress corrosion occurs in the conductor part.
As an improved version of this, a so-called watertight insulated electric wire has been proposed in which the stranded conductor is filled with a watertight compound to prevent the infiltration of rainwater and the like.
そして、このような水密絶縁電線は、一般に、先ず、撚
線導体中に水密コンパウンドを充填し、次いで、ポリエ
チレン、ポリ塩化ビニル等の絶縁体を押出し被覆した後
、冷却することによって製造されている。Such watertight insulated wires are generally manufactured by first filling a stranded conductor with a watertight compound, then extruding an insulator such as polyethylene or polyvinyl chloride to cover it, and then cooling it. .
〈発明が解決しようとする問題点〉
ところが、このように絶縁体の押出し被覆後、直ちに冷
却する製造方法では、導体と水密コンパウンドとの密着
性が不十分で、特に、布設の際、又は布設後において、
繰り返して屈曲されると、導体と水密コンパウンドとが
部分的に剥離する等して、水密性が著しく低下する問題
があった。<Problems to be Solved by the Invention> However, in this manufacturing method in which the insulator is extruded and immediately cooled after being coated, the adhesion between the conductor and the watertight compound is insufficient, especially during installation or installation. Later on,
When repeatedly bent, there is a problem in that the conductor and the watertight compound partially peel off, resulting in a significant decrease in watertightness.
このため、十分な水密性が確保されるためには、導体と
水密コンパウンドとの両者が十分に密着される必要があ
る。Therefore, in order to ensure sufficient watertightness, both the conductor and the watertight compound need to be in close contact with each other.
一方、上記電線は、配電線であるため、接続や端末処理
の際、部分的な皮剥ぎが頻繁に行われる。On the other hand, since the above-mentioned electric wire is a power distribution line, partial stripping is frequently performed during connection and terminal processing.
この際、水密コンパウンドが絶縁体の剥離と同時に絶縁
体側に捗るのではなく、導体表面側に残るようだと、こ
の除去作業が大変で、大幅な作業性の低下を招く。従っ
て、少なくとも水密コンパウンドと絶縁体との密着力（
接着力）が水密コンパウンドと導体とのそれより、大き
いことが必要とさる。しかしながら、上述のように水密
コンパウンドを予め充填した撚線導体に絶縁体を後から
押出し被覆する所謂、タンデム方式では、本発明者等の
研究によると、水密コンパウンドと絶縁体との密着力を
水密コンパウンドと導体とのそれより、あまり大きく出
来ず、皮剥時、水密コンパウンドが導体側に残ることが
判った。At this time, if the watertight compound does not spread to the insulator side at the same time as the insulator is peeled off, but remains on the conductor surface side, the removal work is difficult and the work efficiency is significantly reduced. Therefore, at least the adhesion between the watertight compound and the insulator (
The adhesion force (adhesion force) needs to be greater than that between the watertight compound and the conductor. However, in the so-called tandem method, in which the stranded wire conductor is pre-filled with a watertight compound and then coated with an insulator by extrusion, research by the present inventors has shown that the adhesion between the watertight compound and the insulator is It was found that it could not be made much larger than that between the compound and the conductor, and that the watertight compound remained on the conductor side when the skin was peeled off.
本発明は、このような従来の問題点に鑑みてなされたも
のである。The present invention has been made in view of such conventional problems.
く問題点を解決するための手段及びその作用〉か＼る本
発明の要旨とするところは、撚線導体に水密コンパウン
ドと絶縁被覆とを同時押出しし、次いで加圧処理を行う
ことによって、水密絶縁電線を得る製造方法にある。The gist of the present invention is to simultaneously extrude a watertight compound and an insulating coating onto a stranded wire conductor, and then to perform a pressure treatment to make it watertight. The manufacturing method for obtaining insulated wires.
この概略を図示すると、第１図の如くで、導体送出機１
より送り出された撚線導体Ｗは、先ず、押出機２部分で
、水密コンパウンドと絶縁体とが同時押出しされ、直ち
に加圧部３に入って加圧され、次に冷却部４に導かれて
冷却され、最後に電線巻取機５によって巻き取られる。The outline of this is shown in Figure 1, with a conductor sending machine 1
The stranded conductor W sent out from the extruder is first extruded with a watertight compound and an insulator at the same time in the extruder 2 section, immediately enters the pressurizing section 3 to be pressurized, and then led to the cooling section 4. It is cooled and finally wound up by the wire winding machine 5.
次に、本発明で用いられる材料について詳述すると、先
ず、撚線導体としては、硬銅撚線等の銅撚線が使用され
、絶縁体としは、ポリエチレン、ポリ塩化ビニル等が使
用でき、更に水密コンパウンドとしては、エチレン−酢
酸ビニル（ＥＶＡ）又はこれを主成分とするＥＶＡ系水
密コンパウンド、ポリ塩化ビニルを主成分とするＰＶＣ
系水密コンパウンド、エチレン−エチルアクリレート（
ＥＥＡ）又はこれを主成分とするＥＥＡ系水密コンバン
ド等が用いられる。Next, to explain in detail the materials used in the present invention, first, a copper stranded wire such as a hard copper stranded wire is used as the stranded wire conductor, and polyethylene, polyvinyl chloride, etc. can be used as the insulator. Furthermore, as a watertight compound, ethylene-vinyl acetate (EVA) or an EVA-based watertight compound whose main component is ethylene-vinyl acetate (EVA), PVC whose main component is polyvinyl chloride, etc.
watertight compound, ethylene-ethyl acrylate (
EEA) or an EEA-based watertight composite band containing this as a main component is used.
そして、上記押出機２では、コモンヘッド（同時押出ヘ
ッド）を用いて同時押出しするため、水密コンパウンド
と絶縁体とは極めて良好に密着される。Since the extruder 2 performs simultaneous extrusion using a common head (co-extrusion head), the watertight compound and the insulator are brought into close contact extremely well.
又、上記加圧部３には、加圧気体、例えば加圧空気、加
圧窒素ガス、加圧水蒸気等が充填されており、この加圧
により、各部の密着性、特に水密コンパウンドと導体と
の密着性が向上される。Further, the pressurizing section 3 is filled with pressurized gas such as pressurized air, pressurized nitrogen gas, pressurized steam, etc., and this pressurization improves the adhesion of each part, especially between the watertight compound and the conductor. Adhesion is improved.
この加圧部３での加圧力は、０．５ｋｇ／ｃｍ以上とす
ることが望ましく、好ましくは、０．５〜１０ ｋｇ
／ ｃｍとするとよい。と言うのは、０．５ｋｇ／Ｃｌ
１１未満では、水密コンパウンドと導体との密着性の向
上は殆ど期待できず、又、１０ｋｇ／ｃｕ＋を越えるよ
うな高圧であっても、そんなに密着性の向上は望めず、
逆に絶縁体表面に導体の撚線跡が現れて、外観不良を起
こすからである。It is desirable that the pressurizing force in this pressurizing part 3 be 0.5 kg/cm or more, preferably 0.5 to 10 kg
/ cm is recommended. That means 0.5kg/Cl
If it is less than 11, hardly any improvement in adhesion between the watertight compound and the conductor can be expected, and even at high pressures exceeding 10 kg/cu+, no significant improvement in adhesion can be expected.
Conversely, traces of twisted wires of the conductor appear on the surface of the insulator, resulting in poor appearance.
つまり、本発明では、先ず、水密コンパウンドと絶縁体
との同時押出しとすることによって、水密コンパウンド
と絶縁体との密着性が向上される。That is, in the present invention, first, the adhesion between the watertight compound and the insulator is improved by coextruding the watertight compound and the insulator.
これは両者が同じ有機物同志であって、本質的に接着性
が良好であることに加え、同時押出であるので、両者が
高温、軟化状態にあって接着され易い条件下で接着され
るからであると、推論される。This is because both are organic substances and have essentially good adhesion, and because they are co-extruded, they are bonded under conditions that are high and soften, making them easy to bond. It is inferred that there is.
このことから、水密コンパウンドと絶縁体との密着力は
、水密コンパウンドと導体（例えば、異質の金属物質で
ある銅等）との密着力より、小さくなることはない。For this reason, the adhesion between the watertight compound and the insulator is never smaller than the adhesion between the watertight compound and the conductor (for example, copper, which is a different metal material).
従って、絶縁体の皮剥時には、水密コンパウンドは絶縁
体側に密着してくるため、導体側に残ることがな（なる
。Therefore, when the insulator is stripped, the watertight compound adheres closely to the insulator and does not remain on the conductor.
又、次いで、行われる加圧処理では、その加圧力が各部
に均一に作用するため、水密コンパウンドと導体との間
のみならず、水密コンパウンドと絶縁体との間の密着力
も向上されるわけであるが、上記の条件から、水密コン
パウンドと絶縁体との密着力は、常に水密コンパウンド
と導体とのそれより大きいため、皮剥性を低下させるこ
とはな（、電線全体から見れば、従来のものに比較して
、水密コンパウンドと導体との密着力が大幅に改善され
る。このことにより、通常時には勿論のこと、屈曲させ
ても容易に水密コンパウンドが導体から剥離せず、水密
性に優れた電線を得ることができる。In addition, in the subsequent pressurization treatment, the pressure is applied uniformly to each part, which improves the adhesion not only between the watertight compound and the conductor, but also between the watertight compound and the insulator. However, from the above conditions, the adhesion between the watertight compound and the insulator is always greater than that between the watertight compound and the conductor, so it does not reduce the peelability (from the perspective of the entire wire, it is The adhesion between the watertight compound and the conductor is greatly improved compared to the previous one.As a result, the watertight compound does not easily peel off from the conductor, not only during normal use, but also when bent, resulting in excellent watertightness. You can get the wire.
〈実施例〉
６０ｍｎｆの硬銅撚線導体上にＥＶＡ系水密コンパウン
ド又はＰＶＣ系水密コンパウンドとポリ塩化ビニル絶縁
体とを同時押出しによって被覆し、次いで加圧処理を第
１表に示す条件で行い、冷却して水密ビニル絶縁電線を
得た。<Example> A 60 mnf hard copper stranded wire conductor was coated with an EVA watertight compound or a PVC watertight compound and a polyvinyl chloride insulator by coextrusion, and then pressure treatment was performed under the conditions shown in Table 1. It was cooled to obtain a watertight vinyl insulated wire.
この電線について、水密性（製造直後、屈曲後）及び皮
剥性、及び外観を調べた。This electric wire was examined for watertightness (immediately after manufacture and after bending), peelability, and appearance.
又、比較例として、前記水密コンパウンドとポリ塩化ビ
ニル絶縁体をタンデムに押出し被覆した場合、同時押出
しであるが加圧処理しない場合、同時押出しで加圧処理
を高圧力で行った場合に得られる各電線についても上記
と同様の特性について調べた。In addition, as a comparative example, when the watertight compound and polyvinyl chloride insulator are extruded in tandem and coated, when the watertight compound and the polyvinyl chloride insulator are coextruded but not pressure treated, and when the pressure treatment is performed at high pressure with coextrusion. The same characteristics as above were also investigated for each electric wire.
尚、上記製造直後の水密性は、長さ２．５ｍの電線の片
端に１ｋｇ／ＣｒＡの水圧を加え、２４時間放置した後
、他端からの漏水の有無で調べた。又、屈曲後の水密性
は、電線外径の１０倍の半径のドラムで往復１０回曲げ
た後、上記と同様の試験を行って調べた。The watertightness immediately after the above production was determined by applying a water pressure of 1 kg/CrA to one end of a 2.5 m long electric wire, leaving it for 24 hours, and checking for water leakage from the other end. The watertightness after bending was examined by bending the wire back and forth 10 times with a drum having a radius 10 times the outer diameter of the wire, and then conducting the same test as above.
上記皮剥性は、ナイフを用いて電線の絶縁体を二つ割り
にして剥ぎ取り、導体上の水密コンパウンドの有無を調
べた。The above-mentioned peelability was determined by cutting the insulation of the wire in half using a knife and peeling it off, and checking for the presence or absence of a watertight compound on the conductor.
その結果は、上記第１表に併記した。The results are also listed in Table 1 above.
〈発明の効果〉
以上の説明から明らかな如く、本発明の水密絶縁電線の
製造方法では、水密コンパウンドと絶縁体とを同時押出
しし、次いで加圧処理するものであるため、従来のこの
種の電線に比較して、導体と水密コンパウンドとの密着
性が大幅に向上され、通常時においては勿論のこと、多
少の屈曲等があっても容易に水密コンパウンドが導体に
より剥離することのない優れた水密性を有する絶縁電線
を得ることができると共に、水密コンパウンドと絶縁体
との密着力が水密コンパウンドと導体とのそれよりも大
きくなるため、絶縁体の剥離時、水密コンパウンドは絶
縁体側に密着して綺麗な導体表面が得られ、電線の接続
や端末処理等において極めて重要である絶縁体の皮剥性
を著しく向上させた絶縁電線を得ることができる。<Effects of the Invention> As is clear from the above description, in the method for manufacturing a watertight insulated wire of the present invention, a watertight compound and an insulator are simultaneously extruded and then subjected to pressure treatment. Compared to electric wires, the adhesion between the conductor and the watertight compound is greatly improved, and the watertight compound does not easily peel off from the conductor even under normal conditions or even if it is slightly bent. In addition to being able to obtain a watertight insulated wire, the adhesion between the watertight compound and the insulator is greater than that between the watertight compound and the conductor, so when the insulator is peeled off, the watertight compound adheres to the insulator side. It is possible to obtain an insulated wire with a clean conductor surface and significantly improved peelability of the insulator, which is extremely important in wire connections, terminal treatments, etc.
第１図は本発明に係る水密絶縁電線の製造方法を実施す
るための装置系を示した概略説明図である。
図中、
１・・・導体送出機、
２・・・押出機、
３・・・加圧部、
４・・・冷却部、
５・・・電線巻取機、FIG. 1 is a schematic explanatory diagram showing an apparatus system for carrying out the method for manufacturing a watertight insulated electric wire according to the present invention. In the figure, 1... Conductor sending machine, 2... Extruder, 3... Pressurizing section, 4... Cooling section, 5... Wire winding machine,
Claims (2)
にプラスチック絶縁体を押出し被覆する水密絶縁電線の
製造方法において、前記水密コンパウンドとプラスチッ
ク絶縁体とを同時押出し、次いで加圧処理することを特
徴とする水密絶縁電線の製造方法。(1) In a method for manufacturing a watertight insulated wire, in which a stranded wire conductor is filled with a watertight compound and a plastic insulator is extruded and coated thereon, the watertight compound and the plastic insulator are coextruded and then subjected to pressure treatment. A method for manufacturing a watertight insulated wire, characterized by:
とすることを特徴とする特許請求の範囲第１項記載の水
密絶縁電線の製造方法。(2) The method for manufacturing a watertight insulated electric wire according to claim 1, characterized in that the pressurizing force of the pressurizing treatment is 0.5 kg/cm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263027A JPS63116315A (en) | 1986-11-05 | 1986-11-05 | Manufacture of watertight insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263027A JPS63116315A (en) | 1986-11-05 | 1986-11-05 | Manufacture of watertight insulated wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63116315A true JPS63116315A (en) | 1988-05-20 |
Family
ID=17383864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61263027A Pending JPS63116315A (en) | 1986-11-05 | 1986-11-05 | Manufacture of watertight insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63116315A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506248A (en) * | 2003-09-16 | 2007-03-15 | コムスコープ インコーポレイテッド オブ ノース カロライナ | Coaxial cable with peelable center conductor precoat |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4922582A (en) * | 1972-06-26 | 1974-02-28 | ||
| JPS61227317A (en) * | 1985-04-01 | 1986-10-09 | 株式会社フジクラ | Manufacture of watertight compound covered core wire |
-
1986
- 1986-11-05 JP JP61263027A patent/JPS63116315A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4922582A (en) * | 1972-06-26 | 1974-02-28 | ||
| JPS61227317A (en) * | 1985-04-01 | 1986-10-09 | 株式会社フジクラ | Manufacture of watertight compound covered core wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506248A (en) * | 2003-09-16 | 2007-03-15 | コムスコープ インコーポレイテッド オブ ノース カロライナ | Coaxial cable with peelable center conductor precoat |
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