JPH0351208B2 - - Google Patents
Info
- Publication number
- JPH0351208B2 JPH0351208B2 JP61163467A JP16346786A JPH0351208B2 JP H0351208 B2 JPH0351208 B2 JP H0351208B2 JP 61163467 A JP61163467 A JP 61163467A JP 16346786 A JP16346786 A JP 16346786A JP H0351208 B2 JPH0351208 B2 JP H0351208B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- continuously
- diameter
- extruded
- linked
- 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
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 239000003607 modifier Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 4
- 238000004132 cross linking Methods 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Cable Accessories (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は各種配管やケーブルの接続部、その
他各種の管や棒の防食あるいは保温などのための
被覆に使用される熱収縮管の製造方法に関し、特
に架橋型樹脂を使用した熱収縮管を連続的に製造
する方法に関するものである。[Detailed Description of the Invention] Industrial Application Field This invention relates to a method of manufacturing heat shrinkable tubes used for coating various piping and cable connections, and other various types of tubes and rods for corrosion protection or heat retention. In particular, it relates to a method for continuously manufacturing heat-shrinkable tubes using crosslinked resin.
従来の技術
従来から、石油、ガス、水道あるいは化学プラ
ント等のライニング鋼管の接続部や、電力ケーブ
ルあるいは通信ケーブルの保護鋼管の接続部など
の防食や保温には、加熱によつて収縮してその接
続部などを密着状態で被覆することができる熱収
縮管を用いることが行なわれている。このような
熱収縮管には各種の合成樹脂が用いられている
が、最近では架橋ポリエチレンなどの架橋型合成
樹脂を使用することが多い。Conventional technology Traditionally, corrosion protection and heat insulation have been used for the joints of lining steel pipes in oil, gas, water, and chemical plants, and the joints of protective steel pipes for power cables and communication cables, by shrinking them when heated. Heat-shrinkable tubes that can tightly cover connecting parts and the like are being used. Various synthetic resins are used for such heat-shrinkable tubes, but recently cross-linked synthetic resins such as cross-linked polyethylene are often used.
ところで架橋型熱収縮管を連続的に製造する方
法としては、特公昭47−19356号公報記載の方法
が知られている。この方法は、管壁に多数の貫通
小孔を形成したアルミニウム管等の金属管上に未
架橋の樹脂コンパウンドを押出被覆した後、その
被覆された管を架橋室、膨張室および冷却室に連
続的に通過させ、架橋室において架橋した後、前
記膨張室において管の内外圧を制御して金属管上
の樹脂チユーブを膨張させて、その膨張状態のま
ま冷却室で冷却させ、巻取る方法である。 By the way, as a method for continuously manufacturing cross-linked heat-shrinkable tubes, a method described in Japanese Patent Publication No. 19356/1983 is known. In this method, an uncrosslinked resin compound is extruded and coated on a metal tube such as an aluminum tube with many small through holes formed in the tube wall, and then the coated tube is connected to a crosslinking chamber, an expansion chamber, and a cooling chamber. After crosslinking in the crosslinking chamber, the resin tube on the metal tube is expanded by controlling the internal and external pressure of the tube in the expansion chamber, and the resin tube is cooled in the expanded state in a cooling chamber and then rolled up. be.
発明が解決すべき問題点
前述の従来方法は、金属管をコアとして用いて
その金属管上に樹脂を押出被覆するものであるか
ら、最終的に金属管を抜き取る必要があり、その
ため作業性が低くならざるを得ず、また金属管を
用いるために高コストとなり、さらには金属管を
内挿したまま巻取ることが実際上は困難であるこ
とが多く、したがつてこの方法は非現実的であつ
て実際に架橋型熱収縮管の連続的な製造に適用す
ることは困難であつた。Problems to be Solved by the Invention The above-mentioned conventional method uses a metal tube as a core and coats the metal tube with resin by extrusion, so it is necessary to remove the metal tube at the end, which reduces workability. In addition, the use of a metal tube increases the cost, and furthermore, it is often difficult in practice to wind the metal tube with the metal tube inserted, so this method is unrealistic. However, it has been difficult to actually apply it to the continuous production of cross-linked heat-shrinkable tubes.
この発明は以上の事情を背景としてなされたも
ので、上述の金属管をコアとして用いた場合のよ
うな諸問題を招くことなく、実際に架橋型熱収縮
管を低コスト、高作業性で連続的に製造し得る方
法を提供することを目的とするものである。 This invention was made against the background of the above circumstances, and it is possible to produce cross-linked heat-shrinkable tubes continuously at low cost and with high workability, without causing the problems described above when using metal tubes as cores. The purpose of this invention is to provide a method that can be manufactured in a cost effective manner.
問題点を解決するための手段
この発明の架橋型熱収縮管の連続製造方法は、
架橋型熱収縮管の素材となる未架橋の樹脂を押出
用ダイスとマンドレルとの間から架橋筒内へ中空
管状に連続的に押出すとともに、その押出された
管の内面側に圧力流体を連続的に吹込み、かつ押
出された管の外面と架橋筒の内面との間に摩擦緩
和剤を連続的に供給し、さらに押出された管を架
橋筒の出口からテーパー状に拡大する内面を有す
る拡径ダイス内へ連続的に導き、続いてその拡径
ダイスの拡大端部から冷却筒内へ連続的に導くこ
とを特徴とするものである。Means for Solving the Problems The continuous manufacturing method for crosslinked heat-shrinkable tubes of the present invention includes:
The uncrosslinked resin, which is the material for crosslinked heat-shrinkable tubes, is continuously extruded into a hollow tube from between an extrusion die and a mandrel into a crosslinked tube, and pressure fluid is continuously applied to the inner surface of the extruded tube. A friction modifier is continuously supplied between the outer surface of the extruded tube and the inner surface of the cross-linked tube, and the extruded tube has an inner surface that expands in a tapered shape from the outlet of the cross-linked tube. It is characterized in that it is continuously guided into a diameter-expanding die, and then continuously guided into a cooling cylinder from the enlarged end of the diameter-expanding die.
作 用
架橋型熱収縮管の素材となる未架橋の樹脂は、
押出用ダイスとマンドレルとの間から架橋筒内へ
中空管状に連続的に押出されて、その架橋筒内で
連続的に加熱架橋され、続いてその架橋された管
は架橋筒からテーパー状に拡大する内面を有する
拡径ダイス内に連続的に導かれ、さらにその拡径
ダイスの拡大端部から冷却筒内へ連続的に導かれ
る。ここで、押出された管の内面側には圧力流体
が吹込まれるから、架橋筒体で架橋された管は未
だ低温とならないうちに拡径ダイス内において流
体圧力によつて拡径ダイスのテーパー状に拡大す
る内面に沿つて拡径され、続いてその拡径された
状態で冷却筒内において連続的に冷却されて、熱
収縮管が得られる。Function The uncrosslinked resin that is the material for crosslinked heat-shrinkable tubes is
A hollow tube is continuously extruded from between the extrusion die and the mandrel into the crosslinking cylinder, and is continuously heated and crosslinked within the crosslinking cylinder, and then the crosslinked tube expands from the crosslinking cylinder into a tapered shape. It is continuously guided into a diameter-expanding die having an inner surface, and then continuously guided into a cooling cylinder from the enlarged end of the diameter-expanding die. Here, since pressure fluid is blown into the inner surface of the extruded pipe, the pipe crosslinked with the crosslinked cylinder is moved into the diameter expansion die by the fluid pressure in the diameter expansion die before it reaches a low temperature. The diameter is expanded along the inner surface which expands in shape, and then the expanded diameter is continuously cooled in a cooling cylinder to obtain a heat-shrinkable tube.
そして特に架橋筒内においては、架橋筒内面と
押出された管の外面との間に摩擦緩和剤が連続的
に供給されて、その間の摩擦抵抗が緩和されると
ともに、架橋時における架橋筒内面に対する樹脂
の焼付きが防止される。すなわち、架橋型樹脂か
らなる管を連続製造する場合、樹脂は架橋筒内面
との間で焼付きを生じ易く、また特にこの発明の
方法のように押出された管の内面側に圧力流体を
吹込んでいる場合、押出された管が架橋筒内面に
押し付けられる結果、押出された管の外面と架橋
筒内面との間の摩擦抵抗が大きくなつて焼付きが
生じ易くなる傾向にあり、そのため押出された管
の円滑な移動が困難となつて連続製造に支障を来
たすおそれがあるが、摩擦緩和剤を押出された管
と架橋筒内面との間に連続的に供給することによ
り、両者間が潤滑されてその間の摩擦抵抗が減じ
られるとともに樹脂の焼付きが防止され、その結
果押出された管が円滑に移動して架橋された熱収
縮管を支障なく連続製造することができるのであ
る。 Particularly in the cross-linked cylinder, a friction modifier is continuously supplied between the inner surface of the cross-linked cylinder and the outer surface of the extruded pipe, to alleviate the frictional resistance therebetween, and also to Resin seizure is prevented. That is, when pipes made of cross-linked resin are continuously manufactured, the resin tends to seize with the inner surface of the cross-linked cylinder, and especially when pressure fluid is blown onto the inner surface of the extruded pipe as in the method of the present invention. When the extruded tube is pressed against the inner surface of the cross-linked tube, the frictional resistance between the outer surface of the extruded tube and the inner surface of the cross-linked tube increases and seizure tends to occur. However, by continuously supplying a friction modifier between the extruded tube and the inner surface of the bridge cylinder, it is possible to lubricate the space between the two. This reduces the frictional resistance therebetween and prevents the resin from seizing. As a result, the extruded tube moves smoothly and crosslinked heat-shrinkable tubes can be manufactured continuously without any problems.
なお摩擦緩和剤としては各種の潤滑油や固定潤
滑剤などを使用することも可能であるが、ある種
の潤滑剤では樹脂中に含まれる架橋剤と反応して
潤滑効果が失われたり、あるいは樹脂が劣化した
りすることがあり、その場合には不活性ガスなど
の気体を摩擦緩和剤として用いることが望まし
い。 It is also possible to use various lubricating oils and fixed lubricants as friction modifiers, but some types of lubricants may react with the crosslinking agent contained in the resin and lose their lubricating effect, or The resin may deteriorate, and in that case, it is desirable to use a gas such as an inert gas as a friction modifier.
実施例
添付図面にこの発明の製造方法を実施するため
の装置の一例を示す。Embodiment The accompanying drawings show an example of an apparatus for carrying out the manufacturing method of the present invention.
先ず図示の装置について説明すれば、軸線が垂
直となるように配設された全体として円筒状をな
す押出用ダイス１の内側にはマンドレル２が同心
状に設けられており、押出用ダイス１とマンドレ
ル２との間の下部には連続環状の押出口３が形成
されている。その押出口３は樹脂通路４を介して
図示しない押出機に連絡され、その押出機からの
押出圧力によつて未架橋の樹脂１５が中空管状に
成形された状態で押出されるようになつている。
またマンドレル２には、前記押出口３から押出さ
れた樹脂からなる管５の内面側に外部から圧力流
体を供給するための圧力流体供給路６が軸方向に
沿つて貫通形成されている。 First, to explain the illustrated device, a mandrel 2 is provided concentrically inside a generally cylindrical extrusion die 1 whose axis is perpendicular to the extrusion die 1. A continuous annular extrusion port 3 is formed at the lower part between the mandrel 2 and the mandrel 2. The extrusion port 3 is connected to an extruder (not shown) via a resin passage 4, and the uncrosslinked resin 15 is extruded into a hollow tube shape by the extrusion pressure from the extruder. There is.
Further, a pressurized fluid supply path 6 for supplying pressurized fluid from the outside to the inner surface of the tube 5 made of resin extruded from the extrusion port 3 is formed through the mandrel 2 in the axial direction.
前記押出口３の押出方向前方、すなわち図にお
ける下方には、押出口３の外径すなわち押出用ダ
イスの内径と実質的に相等しい内径を有する架橋
筒７が配設されており、この架橋筒７には加熱架
橋のための温度を確保するためのヒータ８が設け
られている。また架橋筒７の押出口３側の端部に
は、外部から摩擦緩和剤を架橋筒７の内面側に供
給するための摩擦緩和剤供給口９が形成されてい
る。 A bridge tube 7 having an inner diameter substantially equal to the outer diameter of the extrusion outlet 3, that is, the inner diameter of the extrusion die, is disposed in front of the extrusion port 3 in the extrusion direction, that is, at the bottom in the figure. 7 is provided with a heater 8 for ensuring a temperature for thermal crosslinking. Further, at the end of the bridge cylinder 7 on the extrusion port 3 side, a friction modifier supply port 9 is formed for supplying a friction modifier from the outside to the inner surface of the bridge cylinder 7.
前記架橋筒７の下方には、下方へ向つて径がテ
ーパー状に拡大する内面１０Ａを有する拡径ダイ
ス１０が、架橋筒７に連結された状態で配設され
ており、その拡径ダイス１０の下端（拡大端）に
は、その拡径ダイス１０の拡大端の内径と相等し
い内径を有する冷却筒１１が、拡径ダイス１０の
拡大端に連結された状態で配設されている。なお
この冷却筒１１は水冷もしくは空冷構造とされて
いる。 Below the bridging cylinder 7, a diameter expanding die 10 having an inner surface 10A whose diameter expands downward in a tapered manner is connected to the bridging cylinder 7. A cooling cylinder 11 having an inner diameter equal to the inner diameter of the enlarged end of the enlarged diameter die 10 is disposed at the lower end (enlarged end) of the die 10 in a state connected to the enlarged end of the enlarged diameter die 10 . Note that this cooling cylinder 11 has a water-cooled or air-cooled structure.
さらに冷却筒１１の下方には、冷却筒１１から
下方へ垂下する管５の断面形状を偏平に変形させ
る方向へ案内するためのガイド１２が設けられて
おり、かつそのガイド１２の下側には、ガイド１
２により偏平に変形された管５をさらに両側から
圧接するための一対の圧接ローラ１３が配設され
ている。なおその圧接ローラ１３の下方もしくは
側方には図示しない巻取ローラが設けられてい
る。 Furthermore, a guide 12 is provided below the cooling cylinder 11 for guiding the tube 5 hanging downward from the cooling cylinder 11 in a direction that flattens the cross-sectional shape. , guide 1
A pair of pressing rollers 13 are provided for further pressing the tube 5, which has been flattened by the tube 2, from both sides. Note that a winding roller (not shown) is provided below or to the side of the pressure roller 13.
以上の装置を用いて架橋型熱収縮管、例えば架
橋ポリエチレンからなる熱収縮管を製造する方法
について次に説明する。 Next, a method for manufacturing a crosslinked heat-shrinkable tube, for example a heat-shrinkable tube made of crosslinked polyethylene, using the above-described apparatus will be described.
図示しない押出機で混練されて押出された未架
橋の樹脂１５は、樹脂通路４を経て押出用ダイス
１とマンドレル２との間の押出口３から架橋筒７
内へ連続的に中空管状に押出される。その押出さ
れた管５の内面側には、圧力流体供給路６から好
ましくは不活性ガスなどからなる圧力流体が吹込
まれる。また押出された管５の外面と架橋筒７の
内面との間には、摩擦緩和剤供給口９を介して摩
擦緩和剤が供給される。この摩擦緩和剤として
は、基本的には液体、固体（微粒子粉末）、気体
のいずれを用いても良く、液体としてはシリコン
オイルやその他の潤滑油などを、また固体として
は窒化ホウ素（BN）粉末や二硫化モリブデン
（MoS2）粉末などを、さらに気体としては不活
性ガスなどを用いることができる。但し、既に述
べたように油系の潤滑剤を使用することが好まし
くないこともあり、その場合は不活性ガスなどの
気体を摩擦緩和剤として用いることが好ましい。 The uncrosslinked resin 15 kneaded and extruded by an extruder (not shown) passes through a resin passage 4 from an extrusion port 3 between an extrusion die 1 and a mandrel 2 to a crosslinking tube 7.
It is continuously extruded into a hollow tube. Pressure fluid, preferably made of an inert gas, is blown into the inner surface of the extruded tube 5 from the pressure fluid supply path 6. Further, a friction modifier is supplied between the outer surface of the extruded tube 5 and the inner surface of the bridge tube 7 through the friction modifier supply port 9. Basically, any of liquid, solid (fine particle powder), or gas may be used as this friction modifier.The liquid is silicone oil or other lubricating oil, and the solid is boron nitride (BN). Powder, molybdenum disulfide (MoS 2 ) powder, etc. can be used, and as the gas, an inert gas can be used. However, as already mentioned, it may not be preferable to use an oil-based lubricant, and in that case, it is preferable to use a gas such as an inert gas as a friction modifier.
前述のようにして架橋筒７内に押出された未架
橋の樹脂からなる管５は、自重や圧接ローラ１３
の引取り回転力さらには図示しない巻取機の巻取
力等につて架橋筒７内を下降し、その間加熱架橋
が施される。この時、前記圧力流体の加圧力によ
つて管５は架橋筒７の内面に圧接されようとする
が、摩擦緩和剤によつて架橋筒７内面と押出され
た管５の外面との間の摩擦抵抗が緩和され、その
間で焼付きが発生することなく、押出された管は
円滑に下降する。 The tube 5 made of uncrosslinked resin extruded into the crosslinking cylinder 7 as described above is not affected by its own weight or the pressure roller 13.
The material is lowered in the crosslinking tube 7 by the take-up rotational force, the winding force of a winder (not shown), etc., and heat crosslinking is performed during this time. At this time, the tube 5 tries to be pressed against the inner surface of the bridging tube 7 due to the pressurizing force of the pressure fluid, but the friction reducing agent causes a gap between the inner surface of the bridging tube 7 and the outer surface of the extruded tube 5. Frictional resistance is relaxed, and the extruded tube descends smoothly without seizing.
架橋された管５は続いて拡径ダイス１０を通過
するが、この通過時には未だ高温となつているた
め、前述の圧力流体による加圧力によつて拡径ダ
イス１０の内面１０Ａに沿つて展伸されて、拡径
される。続いてその拡径された管は冷却筒体１１
内で室温近くまで冷却され、熱収縮管となる。こ
の後には、ガイド１２によつて管５は偏平に変形
され、さらに圧接ローラ１３により両側から圧接
されて畳まれた状態となり、図示しない巻取機に
よつて巻取られる。なおここで管５が圧接ローラ
１３により圧接されることによつて管５の内部空
間がガスシールされるから、前述のような圧力流
体による加圧力が拡径のために有効に作用するこ
とになる。 The cross-linked pipe 5 then passes through the diameter-expanding die 10, but since it is still at a high temperature during this passage, it is expanded along the inner surface 10A of the diameter-expanding die 10 by the pressurizing force of the pressurized fluid mentioned above. and the diameter is expanded. Subsequently, the diameter-enlarged tube is turned into a cooling cylinder body 11.
The tube is cooled down to near room temperature and becomes a heat-shrinkable tube. After this, the tube 5 is deformed into a flat shape by the guide 12, and then pressed from both sides by the pressure rollers 13 into a folded state, and then wound up by a winder (not shown). Note that here, since the internal space of the tube 5 is gas-sealed by being pressed by the pressure roller 13, the pressurizing force by the pressure fluid as described above acts effectively to expand the diameter. Become.
発明の効果
この発明の方法によれば、架橋型樹脂からなる
熱収縮管を、架橋筒内で焼付きが生じたりするこ
となく円滑に連続製造することができ、したがつ
て特に長尺の熱収縮管を連続製造するに最適であ
る。さらにこの発明の方法は、従来の金属管上に
押出被覆する方法と異なり、最終的に金属管を抜
き取る必要もないため、作業性も良好でかつコス
トも低廉であり、したがつて実際に量産的規模で
架橋型熱収縮管の製造に適用することができる。Effects of the Invention According to the method of the present invention, it is possible to smoothly and continuously manufacture heat-shrinkable tubes made of cross-linked resin without causing seizure within the cross-linked tube, and it is therefore Ideal for continuous production of shrink tubes. Furthermore, unlike the conventional extrusion coating method on metal tubes, the method of the present invention does not require the final extraction of the metal tubes, so it is easy to work with and has low costs, making it suitable for mass production. It can be applied to the production of cross-linked heat shrinkable tubes on a large scale.
図面はこの発明の方法を実施する装置の一例を
示す略解的な縦断面図である。
１……押出用ダイス、２……マンドレル、３…
…押出口、５……押出された管、６……圧力流体
供給路、７……架橋筒、９……摩擦緩和剤供給
口、１０……拡径ダイス、１１……冷却筒。
The drawing is a schematic longitudinal sectional view showing an example of an apparatus for carrying out the method of the present invention. 1...Extrusion die, 2...Mandrel, 3...
. . . Extrusion port, 5 .
Claims (1)
押出用ダイスとマンドレルとの間から架橋筒内へ
中空管状に連続的に押出すとともに、その押出さ
れた管の内面側に圧力流体を連続的に吹込み、か
つ押出された管の外面と架橋筒の内面との間に摩
擦緩和剤を連続的に供給し、さらに押出された管
を架橋筒の出口からテーパー状に拡大する内面を
有する拡径ダイス内へ連続的に導き、続いてその
拡径ダイスの拡大端部から冷却筒内へ連続的に導
くことを特徴とする架橋型熱収縮管の連続製造方
法。 ２ 前記摩擦緩和剤として、気体を用いる特許請
求の範囲第１項記載の架橋型熱収縮管の連続製造
方法。[Scope of Claims] 1. Continuously extruding an uncrosslinked resin, which is a material for a crosslinked heat-shrinkable tube, into a crosslinked tube from between an extrusion die and a mandrel into a hollow tube, and Pressure fluid is continuously blown into the inner surface, a friction modifier is continuously supplied between the outer surface of the extruded tube and the inner surface of the cross-linked tube, and the extruded tube is tapered from the outlet of the cross-linked tube. A continuous manufacturing method for a crosslinked heat-shrinkable tube, characterized by continuously guiding it into a diameter-expanding die having an inner surface that expands in shape, and then continuously guiding it into a cooling cylinder from the enlarged end of the diameter-expanding die. . 2. The method for continuously manufacturing a crosslinked heat-shrinkable tube according to claim 1, wherein a gas is used as the friction modifier.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163467A JPS6319225A (en) | 1986-07-11 | 1986-07-11 | Continuous preparation of crosslinked heat shrinkable pipe |
| DE3787329T DE3787329T2 (en) | 1986-07-11 | 1987-07-10 | Device for the continuous production of a heat-shrinkable cross-linked plastic tube. |
| EP87306104A EP0252749B1 (en) | 1986-07-11 | 1987-07-10 | Apparatus for continuously producing heat-shrinkable crosslinked resin tube |
| KR1019870007458A KR950004719B1 (en) | 1986-07-11 | 1987-07-11 | Apparatus for continuously producing heat-shrinkable crosslinked resin tube |
| MYPI87000982A MY102870A (en) | 1986-07-11 | 1987-07-11 | Apparatus for continuously producing heat-shrinkable crosslinked resin tube. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163467A JPS6319225A (en) | 1986-07-11 | 1986-07-11 | Continuous preparation of crosslinked heat shrinkable pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6319225A JPS6319225A (en) | 1988-01-27 |
| JPH0351208B2 true JPH0351208B2 (en) | 1991-08-06 |
Family
ID=15774425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61163467A Granted JPS6319225A (en) | 1986-07-11 | 1986-07-11 | Continuous preparation of crosslinked heat shrinkable pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101641551B1 (en) * | 2015-06-12 | 2016-07-21 | 유한회사 대구특수금속 | Method for manufacturing nameplate of vehicle having half mirror effect and screen printing ink therefor |
-
1986
- 1986-07-11 JP JP61163467A patent/JPS6319225A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101641551B1 (en) * | 2015-06-12 | 2016-07-21 | 유한회사 대구특수금속 | Method for manufacturing nameplate of vehicle having half mirror effect and screen printing ink therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6319225A (en) | 1988-01-27 |
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