JPH0463607B2 - - Google Patents
Info
- Publication number
- JPH0463607B2 JPH0463607B2 JP62100836A JP10083687A JPH0463607B2 JP H0463607 B2 JPH0463607 B2 JP H0463607B2 JP 62100836 A JP62100836 A JP 62100836A JP 10083687 A JP10083687 A JP 10083687A JP H0463607 B2 JPH0463607 B2 JP H0463607B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- mold
- crosslinking
- gas seal
- temperature
- 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 - Lifetime
Links
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- Manufacturing Of Electrical Connectors (AREA)
- Processing Of Terminals (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、絶縁ケーブルの押出モールドジヨイ
ント部の製造方法の改良、特にモールドジヨイン
ト部の押出成型後に行われる当該部分の加熱・加
圧・架橋処理作業の改良に関するものである。[Detailed explanation of the invention] [Industrial use field] The present invention is an improvement in the method of producing the extruded mold junation part of the insulating cable, especially the heated and pressurized part of the part after the molding molded molding of the mold junator.・Related to improvements in crosslinking treatment work.
［従来の技術］
絶縁ケーブルの押出モールドジヨイント部を押
出し成型後、架橋用金型に組込み加熱、加圧して
架橋する際、金型のガスシール部の近傍のケーブ
ルがケーブル絶縁体の融点以上に温度上昇し、熱
膨張やガス加圧により該ケーブルが大きく変形す
ることがある。これを防ぐ方法として、金型外部
からケーブル表面を水冷したり（例えば特開昭54
−164283号公報参照）、又ガスシール部の温度を
下げるために金型温度を下げる方法などが行なわ
れている（例えば特公昭55−22912号公報参照）。[Prior art] After the extrusion mold joint part of an insulated cable is extruded, when it is assembled into a crosslinking mold and crosslinked by heating and pressurizing, the cable near the gas seal part of the mold is heated to a temperature higher than the melting point of the cable insulator. When the temperature rises, the cable may be significantly deformed due to thermal expansion or gas pressure. One way to prevent this is to water-cool the cable surface from outside the mold (for example,
(See Japanese Patent Publication No. 164283), and methods of lowering the mold temperature in order to lower the temperature of the gas seal portion (see, for example, Japanese Patent Publication No. 55-22912).
［発明が解決しようとする問題点］
しかるに、金型外部からケーブルの表面を冷却
する方法では、その効果が十分に得られず、金型
温度を下げる方法では、架橋反応に多くの時間を
要する等の問題点を有する。又、仮に寸法変型を
防止できたとしても、ガスシール部は熱膨張とガ
ス加圧によりケーブル絶縁体に大きな剪断応力が
加わるので、このように大きな剪断応力の存在下
でガスシール部近傍のケーブル表面温度がケーブ
ル絶縁体の融点以上に温度上昇することによつて
ケーブルの絶縁性能を低下させるおそれが大であ
つた。[Problems to be solved by the invention] However, the method of cooling the surface of the cable from outside the mold does not have sufficient effect, and the method of lowering the mold temperature requires a long time for the crosslinking reaction. It has the following problems. Furthermore, even if dimensional deformation could be prevented, large shear stress is applied to the cable insulator due to thermal expansion and gas pressurization at the gas seal part, so in the presence of such large shear stress, the cable near the gas seal part There was a great possibility that the insulation performance of the cable would be degraded due to the surface temperature rising above the melting point of the cable insulator.
本発明の目的は、前記した従来技術の欠点を解
消し、熱による変形を防止し、優れた絶縁性能を
保持する絶縁ケーブルの押出モールドジヨイント
部の製造方法を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing an extrusion mold joint of an insulated cable that eliminates the drawbacks of the prior art described above, prevents deformation due to heat, and maintains excellent insulation performance.
［問題点を解決するための手段］
すなわち、本発明の要旨はガスシール部近傍の
ケーブルを冷却する冷却パイプを金型内に設けた
ことにある。[Means for Solving the Problems] That is, the gist of the present invention is that a cooling pipe for cooling the cable near the gas seal portion is provided in the mold.
即ち、本発明は、絶縁ケーブルの押出モールド
ジヨイント部の製造において、ジヨイントするケ
ーブルのモールドジヨイント部を押出成型後、架
橋用金型に組み込み、加熱・加圧・架橋処理を行
う際、金型内のガスシール部近傍のケーブル上に
冷却パイプを巻付け、これに冷却液を循環して、
該ケーブル表面を冷却し該ケーブル表面の温度を
それ自身の融点以下の温度に押えながら当該架橋
処理を行うことを特徴とする絶縁ケーブルの押出
モールドジヨイント部の製造方法である。 That is, in the production of an extrusion mold joint for an insulated cable, the mold joint of the cable to be jointed is assembled into a crosslinking mold after extrusion molding, and when heating, pressurizing, and crosslinking are performed, the mold joint is A cooling pipe is wrapped around the cable near the gas seal in the mold, and the cooling liquid is circulated around it.
This is a method for manufacturing an extrusion mold joint portion of an insulated cable, characterized in that the crosslinking treatment is performed while cooling the cable surface and keeping the temperature of the cable surface below the melting point of the cable itself.
［作用］
ガスシール部近傍においては、架橋用金型がケ
ーブル表面に密着している為、金型の加熱温度の
熱がそのままケーブルの絶縁体に伝わり、他の部
分と比較した場合、特に高温化しやすく、それに
よつて当該部分のケーブル絶縁体の熱膨張が増
し、結果としてガスシール部のケーブル絶縁体に
は大きな剪断応力が加わることになる。高温時に
強い剪断応力を受けることが冷却後のケーブルの
絶縁体の絶縁性能を低下させる原因になるのであ
るが、本発明は金型内のガスシール部近傍のケー
ブルの加熱を冷却パイプで冷却することにより当
該部分のケーブル表面の温度をそれ自身の溶融温
度以下にして熱膨張を軽減し、もつて剪断応力を
軽減することにより、冷却後のケーブル絶縁体の
絶縁性能の低下を防ぐことが出来るのである。
尚、この際ガスシール部近傍だけでなく金型内の
モールドジヨイント部を除くケーブル部分をより
多く冷却すると熱膨張を軽減し、剪断応力を軽減
するのに更に有効である。[Function] Near the gas seal, the bridging mold is in close contact with the cable surface, so the heat from the heating temperature of the mold is directly transmitted to the cable insulation, making it particularly hot compared to other parts. This increases the thermal expansion of the cable insulation in that area, resulting in high shear stress on the cable insulation at the gas seal. Being exposed to strong shearing stress at high temperatures causes a decline in the insulation performance of the cable insulator after cooling, but in the present invention, the heating of the cable near the gas seal in the mold is cooled using a cooling pipe. This reduces the temperature of the cable surface in the relevant part below its own melting temperature, reduces thermal expansion, and reduces shear stress, thereby preventing a decline in the insulation performance of the cable insulator after cooling. It is.
At this time, cooling not only the vicinity of the gas seal section but also the cable section inside the mold excluding the mold joint section is more effective in reducing thermal expansion and shear stress.
尚、特公昭54−22598号公報、及び特公昭54−
31596号公報において、架橋用金型の端部に冷却
部が設けられているが、これはモールドジヨイン
ト部を加熱・加圧・架橋処理した後、金型を冷却
するための設備であり、本発明の冷却パイプのよ
うに加熱・加圧・架橋時における金型内ケーブ
ル、特に金型のガスシール部近傍のケーブルを冷
却するためのものではない。 In addition, Special Publication No. 54-22598, and Special Publication No. 54-
In Publication No. 31596, a cooling part is provided at the end of the crosslinking mold, but this is equipment for cooling the mold after the mold joint part is heated, pressurized, and crosslinked. Unlike the cooling pipe of the present invention, it is not intended to cool the cable inside the mold during heating, pressurization, and crosslinking, especially the cable near the gas seal part of the mold.
［実施例］
第１図は本発明の一実施例である。金型２のガ
スシール部５の近傍のCVケーブル１の表面を冷
却するため、金型２内に水冷パイプ４を設け、押
出成型後のモールドジヨイント部３を加熱・加
圧・架橋処理を行う際、該水冷パイプ４に水道水
を循環させることにより、ガスシール部５の近傍
のCVケーブル表面温度をポリエチレンの融点以
下の温度に押えながら架橋処理を行なつた。[Example] FIG. 1 shows an example of the present invention. In order to cool the surface of the CV cable 1 near the gas seal part 5 of the mold 2, a water cooling pipe 4 is provided in the mold 2, and the mold joint part 3 after extrusion is heated, pressurized, and crosslinked. During the crosslinking process, tap water was circulated through the water cooling pipe 4 to maintain the surface temperature of the CV cable in the vicinity of the gas seal part 5 to a temperature below the melting point of polyethylene.
［発明の効果］
本発明により、熱によるケーブルの変形及びケ
ーブル絶縁体の絶縁性能の低下を防ぐことが出
来、ケーブルジヨイント部の品質を大幅に向上さ
せることが出来る。[Effects of the Invention] According to the present invention, deformation of the cable due to heat and deterioration of the insulation performance of the cable insulator can be prevented, and the quality of the cable joint can be significantly improved.
第１図は本発明の絶縁ケーブル押出モールドジ
ヨイント部の製造方法の一実施例を説明するため
の部分縦断面図である。
１……CVケーブル、２……金型、３……モー
ルドジヨイント部、４……水冷パイプ、５……ガ
スシール部、６……ガス加圧口。
FIG. 1 is a partial longitudinal cross-sectional view for explaining an embodiment of the method for manufacturing an insulated cable extrusion mold joint according to the present invention. 1...CV cable, 2...Mold, 3...Mold joint section, 4...Water cooling pipe, 5...Gas seal section, 6...Gas pressurization port.
Claims (1)
製造において、ジヨイントするケーブルのモール
ドジヨイント部を押出成型後、架橋用金型に組込
み、加熱・加圧・架橋処理を行う際、金型内のガ
スシール部近傍のケーブル上に冷却パイプを巻付
け、これに冷却液を循環して該ケーブル表面を冷
却し、該ケーブル表面の温度をそれ自身の融点以
下の温度に押えながら当該架橋処理を行うことを
特徴とする絶縁ケーブルの押出モールドジヨイン
ト部の製造方法。1 In the manufacture of extrusion mold joints for insulated cables, the mold joint of the cable to be jointed is extruded and then assembled into a crosslinking mold, and when heating, pressurizing, and crosslinking are performed, the gas seal inside the mold is removed. A cooling pipe is wrapped around the cable near the cable, and a cooling liquid is circulated around the cable to cool the cable surface, and the crosslinking process is carried out while suppressing the temperature of the cable surface to a temperature below its own melting point. A method for manufacturing an extrusion mold joint of an insulated cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62100836A JPS63268412A (en) | 1987-04-23 | 1987-04-23 | Manufacture of extrusion molded joint of insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62100836A JPS63268412A (en) | 1987-04-23 | 1987-04-23 | Manufacture of extrusion molded joint of insulated cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63268412A JPS63268412A (en) | 1988-11-07 |
| JPH0463607B2 true JPH0463607B2 (en) | 1992-10-12 |
Family
ID=14284400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62100836A Granted JPS63268412A (en) | 1987-04-23 | 1987-04-23 | Manufacture of extrusion molded joint of insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63268412A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59121509A (en) * | 1982-12-28 | 1984-07-13 | Fujitsu Ltd | Temperature controlling method of cooling part |
-
1987
- 1987-04-23 JP JP62100836A patent/JPS63268412A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63268412A (en) | 1988-11-07 |
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