JPH0481492B2 - - Google Patents
Info
- Publication number
- JPH0481492B2 JPH0481492B2 JP25354685A JP25354685A JPH0481492B2 JP H0481492 B2 JPH0481492 B2 JP H0481492B2 JP 25354685 A JP25354685 A JP 25354685A JP 25354685 A JP25354685 A JP 25354685A JP H0481492 B2 JPH0481492 B2 JP H0481492B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- adhesive layer
- release tape
- original
- original tube
- 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
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
CVケーブルの接続作業の能率化を図るために、
防食層や補強絶縁層の部分を、テープ巻きで形成
せずに、熱収縮チユーブによつて形成する場合が
ある。[Detailed Description of the Invention] [Industrial Application Field] In order to streamline the connection work of CV cables,
The anti-corrosion layer and the reinforcing insulating layer may be formed using a heat-shrinkable tube instead of being wrapped with tape.
この発明は、そのような場合に使用する熱収縮
チユーブの製造方法に関するもので、特に内側に
EVAなどの接着層を設けた２層構造の熱収縮チ
ユーブの製造方法に関するものである。 This invention relates to a method of manufacturing a heat shrinkable tube used in such cases, and particularly relates to a method for manufacturing a heat shrinkable tube used in such cases.
The present invention relates to a method for manufacturing a heat-shrinkable tube with a two-layer structure provided with an adhesive layer such as EVA.
［従来の技術］
第１図において、１０は下コアであり、この場
合はCVケーブルコアを利用し、その導体１２を
後記のように、加熱回路の一部に利用している。[Prior Art] In FIG. 1, 10 is a lower core, in this case a CV cable core is used, and its conductor 12 is used as part of a heating circuit as described later.
下コア１０の上に離形テープ１６（マイラーな
ど）を巻き、その上に接着層２２と架橋ポリエチ
レン２４の層とからなる２層構造の元チユーブ２
０をかぶせる。 A former tube 2 with a two-layer structure consisting of a release tape 16 (Mylar etc.) wrapped around the lower core 10 and an adhesive layer 22 and a layer of cross-linked polyethylene 24 on top of it.
Overlay with 0.
それから元チユーブ２０の外側に加圧筒３０を
かぶせ、元チユーブ２０の端部との間をシールす
る。 Then, the pressurizing cylinder 30 is placed over the outside of the original tube 20, and the space between it and the end of the original tube 20 is sealed.
３２は金具で、下コア１０および元チユーブ２
０の端部にかぶせられ、それらとの間をシールし
ている。 32 is a metal fitting, which includes the lower core 10 and the original tube 2.
0 and seals between them.
この金具３２と導体１２との間を導電体３４に
より、また加圧筒３０との間を導電体３６により
接続し、元チユーブ加熱用の電気回路を形成す
る。なお加熱は、加圧筒３０への通電加熱によ
る。 The metal fitting 32 and the conductor 12 are connected by a conductor 34, and the pressurizing tube 30 is connected by a conductor 36 to form an electric circuit for heating the original tube. Note that the heating is performed by applying electricity to the pressurizing cylinder 30.
３８はクサビで、先端を元チユーブ２０と下コ
ア１０との間に押し込んでおり、通路４０を通し
て元チユーブ２０の内側に、たとえば窒素ガスを
送りこみ、元チユーブ２０に内圧を与えて拡径さ
せる。 38 is a wedge whose tip is pushed between the original tube 20 and the lower core 10, and for example, nitrogen gas is sent into the inside of the original tube 20 through the passage 40 to apply internal pressure to the original tube 20 and expand its diameter. .
４２はガスの出入口で、当初ここから、たとえ
ば窒素ガスを圧入して元チユーブ２０に外圧を与
えておき、元チユーブ２０の拡径にともなつて、
少しずつ排気して、外圧を一定に保つようにして
いる（排気しないと元チユーブ２０〜加圧筒３０
間のスペースが縮小するので外圧が上昇する）。
なお、元チユーブ２０に外圧を与えるのは、加熱
時における発泡を防止して、絶縁特性を低下させ
ないようにするためである。 Reference numeral 42 denotes a gas inlet/outlet, from which, for example, nitrogen gas is initially pressurized to apply external pressure to the former tube 20, and as the diameter of the former tube 20 expands,
I am trying to keep the external pressure constant by evacuation little by little.
(External pressure increases as the space between them shrinks).
Note that the reason why external pressure is applied to the original tube 20 is to prevent foaming during heating and to prevent deterioration of the insulation properties.
なお、元チユーブ２０は加圧筒３０の内面に接
するところまで拡径する。その後冷却し、一点鎖
線４４以内の部分を熱収縮チユーブとして使用す
る。 Note that the diameter of the original tube 20 expands to the point where it comes into contact with the inner surface of the pressurizing cylinder 30. Thereafter, it is cooled and the portion within the dashed line 44 is used as a heat shrink tube.
［発明が解決しようとする問題点］
はじめ元チユーブ２０は第１図の想像線で示す
状態になつている。そして上記のように、そのと
きから発泡防止のために外圧をかけた状態で加熱
する。そして元チユーブ２０が所定の状態に達し
たとき（融点以上になり、充分に軟らかくなつた
とき）、はじめて内圧をかけてふくらませ、拡径
させる。[Problems to be Solved by the Invention] Initially, the source tube 20 is in the state shown by the imaginary line in FIG. Then, as described above, from that point on, the material is heated with external pressure applied to prevent foaming. When the original tube 20 reaches a predetermined state (when it reaches a melting point or higher and becomes sufficiently soft), internal pressure is applied for the first time to inflate it and expand its diameter.
ところが、接着層２２と離形テープ１６との間
は、低温のうちは問題ないが、高温になると接着
してしまい、さらに外圧がかかつているため接着
層２２の一部が離形テープ１６のラツプ間に押し
こまれる。 However, there is no problem between the adhesive layer 22 and the release tape 16 at low temperatures, but when the temperature rises, the adhesive layer 22 adheres to the release tape 16, and as external pressure is applied, a part of the adhesive layer 22 becomes attached to the release tape 16. Pushed between laps.
その後元チユーブ２０に内圧をかけてふくらま
せると、接着層２２と離形テープ１６との間は離
れるが、接着層２２の内面が凹凸に乱れてしま
う。 When internal pressure is then applied to the original tube 20 to inflate it, the adhesive layer 22 and the release tape 16 are separated, but the inner surface of the adhesive layer 22 becomes irregular.
［問題点を解決するための手段］
元チユーブ２０が軟化する前の段階において内
圧をかけ、元チユーブ２０を弾性変形により離形
テープ１６からわずかに離れる程度にふくらませ
ておくことによつて、上記問題の解決を図つた。[Means for solving the problem] By applying internal pressure to the original tube 20 before it softens and inflating the original tube 20 to the extent that it slightly separates from the release tape 16 due to elastic deformation, the above-mentioned solution can be achieved. I tried to solve the problem.
［その説明］
加熱を開始したとき、元チユーブ２０には外圧
がかかつているが、それを上回る大きな内圧をか
ければ、元チユーブ２０は弾性変形して（高温時
における延伸ではなく）ふくらむ。[Explanation] When heating is started, an external pressure is applied to the original tube 20, but if a large internal pressure exceeding the external pressure is applied, the original tube 20 is elastically deformed (not stretched at high temperatures) and swells.
その、ふくらませる程度は、ごくわずかでよ
く、離形テープ１６から少し離れていればよい。
そうすれば、温度が上昇してきても、接着層２２
〜離形テープ１６間の接着は起きない。 The extent to which it is inflated may be very small, and it is sufficient that it is slightly away from the release tape 16.
That way, even if the temperature rises, the adhesive layer 22
~ Adhesion between the release tapes 16 does not occur.
ただし、接着層２２の温度が高くなり、十分に
軟らかくなると、内圧と外圧との差圧がごくわず
かでも元チユーブ２０はふくらむ。最終的には、
0.1Kg／cm2程度の差圧でふくらむ。 However, if the temperature of the adhesive layer 22 increases and becomes sufficiently soft, the original tube 20 will swell even if the differential pressure between the internal pressure and the external pressure is very small. eventually,
It expands with a pressure difference of about 0.1Kg/cm2.
上記のように、元チユーブ２０に弾性変形を起
させるには、それ以上の差圧が必要なのであるか
ら、元チユーブ２０の軟化にともなつて差圧を順
次少なくしていかないと、元チユーブ２０がパン
クする恐れがあるので、注意が必要である。 As mentioned above, in order to cause the original tube 20 to undergo elastic deformation, a higher differential pressure is required. There is a risk of puncture, so be careful.
［発明の効果］
元チユーブ２０に外圧をかけて発泡を防止する
ようにしておいても、接着層２２と離形テープ１
６とが接着せず、接着層２２の乱れが生じない。[Effect of the invention] Even if external pressure is applied to the original tube 20 to prevent foaming, the adhesive layer 22 and release tape 1
6 is not bonded to each other, and the adhesive layer 22 is not disturbed.
第１図は本発明の実施例と従来技術に共通の説
明図。
１０……下コア、１６……離形テープ、２０…
…元チユーブ、２２……接着層、２４……架橋ポ
リエチレン、３０……加圧筒、３２……金具、３
８……ガス圧入用のクサビ、４２……外圧用ガス
の出入口。
FIG. 1 is an explanatory diagram common to the embodiment of the present invention and the prior art. 10...Lower core, 16...Release tape, 20...
... Original tube, 22 ... Adhesive layer, 24 ... Crosslinked polyethylene, 30 ... Pressure cylinder, 32 ... Metal fitting, 3
8... Wedge for gas pressure injection, 42... External pressure gas inlet/outlet.
Claims (1)
の上に接着層２２と架橋ポリエチレン２４の層と
からなる２層構造の元チユーブ２０をかぶせ、そ
の上に加圧筒３０をかぶせかつ元チユーブ２０の
両端との間を気密にシールし、元チユーブ２０
を、外圧をかけた状態のもとで加熱軟化させかつ
内圧をかけてふくらませて拡径する熱収縮チユー
ブの製造方法において、 前記元チユーブ２０が軟化する前の段階におい
て元チユーブ２０に内圧をかけ、元チユーブ２０
が弾性変形によりふくらんで前記離形テープ１６
からわずかに離れる程度になるようにしておくこ
とを特徴とする、熱収縮チユーブの製造方法。[Claims] 1. Wrap release tape 16 on top of lower core 10, cover with original tube 20 having a two-layer structure consisting of adhesive layer 22 and cross-linked polyethylene layer 24, and apply pressure on top of it. Cover the tube 30 and airtightly seal between both ends of the original tube 20.
In the method of manufacturing a heat-shrinkable tube, the tube is softened by heating under an external pressure, and is inflated and expanded in diameter by applying an internal pressure. , former tube 20
is swollen due to elastic deformation and the release tape 16
A method for manufacturing a heat-shrinkable tube, characterized in that the tube is slightly separated from the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25354685A JPS62113533A (en) | 1985-11-12 | 1985-11-12 | Manufacture of heat-shrinkable tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25354685A JPS62113533A (en) | 1985-11-12 | 1985-11-12 | Manufacture of heat-shrinkable tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62113533A JPS62113533A (en) | 1987-05-25 |
| JPH0481492B2 true JPH0481492B2 (en) | 1992-12-24 |
Family
ID=17252872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25354685A Granted JPS62113533A (en) | 1985-11-12 | 1985-11-12 | Manufacture of heat-shrinkable tubing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62113533A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045136A (en) * | 1988-10-18 | 1991-09-03 | Essex Group, Inc. | Method of manufacturing a heat shrinkable article |
| EP1410896A3 (en) * | 2002-07-15 | 2006-09-06 | BelmaFlex A/S | A method for dimensional change of a part of a flexible pipe, and an arrangement for use in the dimensional change |
| CN109904532B (en) * | 2017-12-11 | 2021-04-13 | 北京小米移动软件有限公司 | Battery Stripping Modules and Terminals |
-
1985
- 1985-11-12 JP JP25354685A patent/JPS62113533A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62113533A (en) | 1987-05-25 |
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