JPS5923684B2 - Manufacturing method of half-split heat shrink tube - Google Patents
Manufacturing method of half-split heat shrink tubeInfo
- Publication number
- JPS5923684B2 JPS5923684B2 JP3361080A JP3361080A JPS5923684B2 JP S5923684 B2 JPS5923684 B2 JP S5923684B2 JP 3361080 A JP3361080 A JP 3361080A JP 3361080 A JP3361080 A JP 3361080A JP S5923684 B2 JPS5923684 B2 JP S5923684B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- manufacturing
- protrusions
- heat
- heat shrink
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/06—Making preforms having internal stresses, e.g. plastic memory
- B29C61/10—Making preforms having internal stresses, e.g. plastic memory by bending plates or sheets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/1806—Heat shrinkable sleeves
- H02G15/1813—Wraparound or slotted sleeves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】
この発明は、通信ケーブルや電力ケーブルの接続部に対
する再接続用や鋼管防蝕用などとして使用される半割型
熱収縮チューブの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a half-split heat shrinkable tube used for reconnecting connection portions of communication cables and power cables, for corrosion protection of steel pipes, and the like.
各種ケーブルの接続部に対する再接続や鋼管防蝕のため
に、円筒の一部を軸方向に切離した半割型の熱収縮チュ
ーブが使用されている。For reconnecting various cable connections and for corrosion protection of steel pipes, half-split heat shrink tubes are used, in which a portion of a cylinder is cut off in the axial direction.
従来の半割型熱収縮チューブの製造方法は、第１図に示
すように、外周面に二条の突起１が設けられた合成樹脂
成の円形パイプ２を電子線照射または化学架橋剤で架橋
した後、これを加熱膨張させて第２図のように拡径し、
この後突起１間の部分を切断して開くことにより行なわ
れるものであつた。As shown in Fig. 1, the conventional method for producing a half-split heat shrink tube is to crosslink a circular pipe 2 made of synthetic resin with two protrusions 1 on its outer circumferential surface using electron beam irradiation or a chemical crosslinking agent. After that, it is heated and expanded to expand its diameter as shown in Figure 2.
After this, the portion between the protrusions 1 was cut and opened.
上記のような製造方法は、膨張方法の複雑さや膨張後の
構造の均質性などに問題点が多く、簡単に製作できしか
も性能性に均質な製品が得られる製造方法の出現が切望
されているのが現状である。The manufacturing method described above has many problems such as the complexity of the expansion method and the uniformity of the structure after expansion, and there is a strong desire for a manufacturing method that can be easily manufactured and that can yield products with uniform performance. is the current situation.
この発明は、上記のような点に鑑みてなされたものであ
り、両側に突起を備えた架橋ポリオレフィンシートを加
熱延伸してチューブを製造するようにし、均質のチュー
ブを手軽な方法で得ることができる製造方法を提供する
ことを目的とする。以下この発明の実施例を第３図乃至
第Ｔ図に基づいて説明する。第３図は延伸される前の原
シート１１の断面形状を示しており、延伸されるシート
部分１２と、このシート部分１２の片面で両側に設けら
れた突起部１３と、シート部分１２の一側に連成された
舌片部１４からなり、異形押出または他の方法により製
作される。This invention was made in view of the above points, and it is possible to manufacture a tube by heating and stretching a crosslinked polyolefin sheet having protrusions on both sides, thereby making it possible to obtain a homogeneous tube by an easy method. The purpose is to provide a manufacturing method that can. Embodiments of the present invention will be described below with reference to FIGS. 3 to T. FIG. 3 shows the cross-sectional shape of the original sheet 11 before being stretched, and shows the sheet portion 12 to be stretched, the projections 13 provided on both sides of one side of the sheet portion 12, and the portion of the sheet portion 12. It consists of tongues 14 connected to the sides and is manufactured by profile extrusion or other methods.
上記両側の突起部１３は延伸後に嵌合部となり、舌片部
１４は嵌合部分の気密性を保つためのものＪ で、延伸
されないため、シート部分１２よりも幾分薄肉厚に形成
されている。The protrusions 13 on both sides become a fitting part after stretching, and the tongue part 14 is for maintaining airtightness of the fitting part, and since it is not stretched, it is formed somewhat thinner than the sheet part 12. There is.
前記原シート１１は、架橋ポリオレフィンを用いて形成
される。The original sheet 11 is formed using crosslinked polyolefin.
ポリオレフィンとしては、低密度ポリエチレン、中密度
ポリエチレン、高密度ポ、 りエチレン、結晶性ポリプ
ロピレン、ＥＶＡ樹脂、ＰＶＣ樹脂、ＥＥＡ樹脂及びエ
ラストマーなどが挙げられる。Examples of the polyolefin include low-density polyethylene, medium-density polyethylene, high-density polyethylene, crystalline polypropylene, EVA resin, PVC resin, EEA resin, and elastomer.
もちろんこれらの複数種類をブレンドしたものや、カー
ボンなどの無機充填材などを含有したものも含まれる。Of course, it also includes blends of multiple types of these and materials containing inorganic fillers such as carbon.
また、架橋の方法としては、平担な原シートを形成した
後、電子線などを照射して架橋する方法、化学架橋剤に
より平担な原シートを形成するときに架橋するなどの方
法が採用できる。In addition, crosslinking methods include forming a flat base sheet and then crosslinking it by irradiating it with an electron beam, or crosslinking it when forming a flat base sheet using a chemical crosslinking agent. can.
また、架橋ポリオレフインのゲル分率、即ちキシレン１
２０℃中８ｈｒ還元後の未？解部分の重量％は、約３０
〜５０％の範囲のものが多く使われる。In addition, the gel fraction of crosslinked polyolefin, that is, xylene 1
After 8 hours of reduction at 20℃? The weight percent of the solution part is about 30
-50% range is often used.
上記のような原シート１１は第４図に示すように、両側
の突起部１３をつかみ具１５で圧締把持した後、延伸温
度に昇温し、てかみ具１５を矢印のように離反させてシ
ート部分１２のみを必要延伸部率に延伸する。As shown in FIG. 4, the original sheet 11 as described above is held by pressing the protrusions 13 on both sides with the grips 15, and then heated to a stretching temperature, and the grips 15 are separated as shown by the arrows. Then, only the sheet portion 12 is stretched to the required stretching ratio.
第５図はこのようにして延伸された後の断面形状を示し
ており、延伸の条件としては、温度はポリオレフインシ
ートの融点または軟化点温度の上下いずれの温度でも可
能であるが、できる限り一定の温度範囲内に精度よくコ
ントロールされる必要がある。Figure 5 shows the cross-sectional shape after being stretched in this way.As for the stretching conditions, the temperature can be either above or below the melting point or softening point of the polyolefin sheet, but it should be kept as constant as possible. The temperature must be precisely controlled within the temperature range.
適当な温度としては、融点または軟化点温度より２０〜
４０℃高い温度が効率よく延伸できる。延伸速度は材質
に依存するが１００ｍｍ／分〜５０００ｍｍ／分の範囲
で可能である。上記のようにして得られた延伸シート１
６には、突起部１３のない側に熱浩融型接着剤１７が全
面に均一塗布され、この後、第６図に示すように、延至
部分を円筒形に彎曲し、両側の突起部１３の外側面を合
掌状に突き合わせることにより、半割型Ｋ；、収縮チユ
ーブ１８として使用するものである。半割型熱収縮チユ
ーブ１８における両側突起部１３の嵌合部分の固定方法
としては、第７図に示すように、ハトメ金具１９を用い
てＬ字金具２０の上から固定するなどの方法があり、こ
のようにしてケーブルＡ等に取付けられた半割型熱収縮
チユーブ１８は、トーチランプなどで加熱して熱収縮さ
せ、接続部あるいはシース補修部を保護するものである
。以上のように、この発明によれば、突起が設けられた
架橋ポリオレフインシートを、つかみ具で突起部分をつ
かんで加熱延伸するようにしたので、シートの延伸作業
が極めて簡単に行なえ、従来のような複雑な膨張作業が
省けると共に、延伸であるので構造の均質性が全体にわ
たつて向上する等の効果をあげることができる。A suitable temperature is 20 to 20 degrees higher than the melting point or softening point.
Stretching can be performed efficiently at a temperature 40°C higher. The stretching speed depends on the material, but is possible in the range of 100 mm/min to 5000 mm/min. Stretched sheet 1 obtained as above
6, a heat-curing adhesive 17 is uniformly applied to the entire surface of the side without the projections 13, and then, as shown in FIG. By abutting the outer surfaces of the two in a palm-shaped manner, the half-split mold K is used as a contraction tube 18. As a method of fixing the fitting portions of the protrusions 13 on both sides of the half-split type heat-shrinkable tube 18, as shown in FIG. The half-split type heat-shrinkable tube 18 attached to the cable A etc. in this manner is heated with a torch lamp or the like to heat-shrink it, thereby protecting the connection portion or the sheath repair portion. As described above, according to the present invention, a crosslinked polyolefin sheet provided with protrusions is heated and stretched by gripping the protrusions with a gripper, so that the sheet stretching operation can be performed extremely easily and unlike the conventional method. This eliminates the need for complicated expansion work, and since stretching is used, the homogeneity of the structure can be improved throughout.
第１図は従来の製造方法に用いた円形パイプの正面図、
第２図は同上を加熱膨張させたチユーブの正面図、第３
図はこの発明に係る製造方法に用いる原シートの正面図
、第４図は同上につかみ具をセツトした状態を示す正面
図、第５図は原シートを延伸した延伸シートの正面図、
第６図は同上を半割型熱収縮チユーブとして用いた状態
の断面図、第７図は同じくチユーブの嵌合部を固定した
正面図である。
１１・・・・・・原シート、１２・・・・・・シート部
分、１３・・・・・・突起部、１４・・・・・・舌片部
、１５・・・・・・つかみ具、１６・・・・・・延伸シ
ート、１７・・・・・・熱醇融型接着剤、１８・・・・
・・半割型熱収縮チユーブ。Figure 1 is a front view of a circular pipe used in the conventional manufacturing method.
Figure 2 is a front view of the tube heated and expanded.
The figure is a front view of an original sheet used in the manufacturing method according to the present invention, FIG. 4 is a front view showing a state in which grips are set on the same, and FIG. 5 is a front view of a stretched sheet obtained by stretching the original sheet.
FIG. 6 is a cross-sectional view of the same as above used as a half-split type heat-shrinkable tube, and FIG. 7 is a front view of the same with the fitting portion of the tube fixed. 11... Original sheet, 12... Sheet part, 13... Protrusion, 14... Tongue piece part, 15... Grip , 16...Stretched sheet, 17...Hot melt adhesive, 18...
・Half-split type heat shrink tube.
Claims (1)
用突起部が設けられ、且つ一方の突起部の外側に舌片を
有する架橋ポリオレフィンからなるシートの上記突起部
を、つかみ具でつかみ、加熱延伸させ、しかる後該突起
部を外側として両突起部の側面を合掌状に突き合わせ、
固定具で固定することを特徴とする半割型熱収縮チュー
ブの製造方法。 ２ 前記加熱延伸されたシートは、突起と反対側の面に
熱溶融型接着剤が塗布されていることを特徴とする特許
請求の範囲第１項記載の半割型熱収縮チューブの製造方
法。[Scope of Claims] 1. The above protrusion of a sheet made of crosslinked polyolefin is provided with bonding protrusions of the same size along both sides of the sheet, and has a tongue piece on the outside of one of the protrusions, Grasp with a grip, heat and stretch, then abut the sides of both protrusions with the protrusions on the outside in the shape of palms together,
A method for manufacturing a half-split heat shrinkable tube characterized by fixing it with a fixture. 2. The method for manufacturing a halved heat-shrinkable tube according to claim 1, wherein the heat-stretched sheet has a heat-melting adhesive applied to a surface opposite to the projections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3361080A JPS5923684B2 (en) | 1980-03-17 | 1980-03-17 | Manufacturing method of half-split heat shrink tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3361080A JPS5923684B2 (en) | 1980-03-17 | 1980-03-17 | Manufacturing method of half-split heat shrink tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56129125A JPS56129125A (en) | 1981-10-09 |
| JPS5923684B2 true JPS5923684B2 (en) | 1984-06-04 |
Family
ID=12391223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3361080A Expired JPS5923684B2 (en) | 1980-03-17 | 1980-03-17 | Manufacturing method of half-split heat shrink tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923684B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171917A (en) * | 1982-04-01 | 1983-10-08 | Fujikura Ltd | Heat-shrinkable sheet for corrosion protection |
| DE3479233D1 (en) * | 1983-05-25 | 1989-09-07 | Shaw Ind Ltd | Heat shrinkable covering |
| JPH0720667B2 (en) * | 1986-04-16 | 1995-03-08 | 株式会社フジクラ | Method for producing heat-shrinkable sheet |
| JPH06312454A (en) * | 1993-02-03 | 1994-11-08 | Fujikura Ltd | Production of heat-shrinkable article |
| CN103986100B (en) * | 2014-06-04 | 2016-10-19 | 国家电网公司 | Cable jacket pyrocondensation patching |
-
1980
- 1980-03-17 JP JP3361080A patent/JPS5923684B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56129125A (en) | 1981-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3959052A (en) | Wrap around heat shrinkable article | |
| EP0022660B1 (en) | Method of forming insulated connections and heat shrinkable tube for use therein | |
| JPH01126123A (en) | Electric cable screen termination arrangement | |
| US4650703A (en) | Recoverable article and method | |
| US4342800A (en) | Polymeric articles | |
| JPS60231568A (en) | Instrument for solder connecting and formation and application thereof | |
| US4496410A (en) | Production of dimensionally recoverable articles | |
| US4422890A (en) | Process for the manufacture of dimensionally recoverable articles | |
| US4425174A (en) | Method of making heat shrinkable articles | |
| EP0046027B1 (en) | Process for the production of a heat recoverable article | |
| EP0042262B1 (en) | Pleated recoverable material | |
| JPS5923684B2 (en) | Manufacturing method of half-split heat shrink tube | |
| EP0068780B1 (en) | Improvements in or relating to dimensionally-recoverable articles | |
| GB2084505A (en) | Producing heat recoverable articles | |
| EP0061344B1 (en) | Strip of heat-recoverable articles | |
| CA1179468A (en) | Process for the manufacture of dimensionally recoverable articles | |
| GB2140343A (en) | Heat recoverable connector | |
| US4738883A (en) | Wrap around heat shrinkable closure with flexible extension | |
| WO1987006182A1 (en) | Heat-recoverable devices | |
| US5474819A (en) | Bonded article | |
| JPS5854009B2 (en) | Manufacturing method for resin pipes that shrink in stages | |
| JPS608980Y2 (en) | heat shrinkable articles | |
| FI66999C (en) | SAETT VIDAR SCARVES AV EN CABLE WITH ISOLERING AV TVAERBUNDEN POYETEN ELLER ANNAN TVAERBUNDEN POLYMER | |
| US4990298A (en) | Method of forming a wrap around heat shrinkable closure with flexible extension | |
| JPH0516234A (en) | Manufacture of heat-shrinkable tube |