JPS6164423A - Method and device for manufacturing flexible double tube - Google Patents

Method and device for manufacturing flexible double tube

Info

Publication number
JPS6164423A
JPS6164423A JP59188689A JP18868984A JPS6164423A JP S6164423 A JPS6164423 A JP S6164423A JP 59188689 A JP59188689 A JP 59188689A JP 18868984 A JP18868984 A JP 18868984A JP S6164423 A JPS6164423 A JP S6164423A
Authority
JP
Japan
Prior art keywords
tube
inner tube
outer tube
flexible
hole
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
Application number
JP59188689A
Other languages
Japanese (ja)
Inventor
Tatsuro Nose
能勢　達郎
Tatsuo Ochi
越智　達夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuraray Plastics Co Ltd
Original Assignee
Kuraray Plastics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kuraray Plastics Co Ltd filed Critical Kuraray Plastics Co Ltd
Priority to JP59188689A priority Critical patent/JPS6164423A/en
Publication of JPS6164423A publication Critical patent/JPS6164423A/en
Pending legal-status Critical Current

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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped

Abstract

PURPOSE:To cover an inner tube with an outer tube under a condition that both of the tubes are separated mutually by a method wherein the outer tube is extruded with a space between the outer surface of the inner tube and air is blown into a space between the inner and outer tubes simultaneously with the extrusion of the outer tube. CONSTITUTION:The inner tube 1, formed previously, is pulled out of an inner tube guide hole 4 through an inner tube guide path 3. In this case, synthetic resin, forming an outer tube, is extruded and formed into a tubular shape through the path 7 and an extruding hole 8 so as to cover the outside of the inner tube and is received together with the inner tube. The inner tube guide hole 4 is arranged with a space between the outer tube extruding hole 8, therefore, the inner tube and the outer tube form separated condition upon extruding the outer tube. Air, introduced from an air introducing port 5, is injected from an injection port 6 into a space between the inner and outer tubes, cools at least the inner surface of the outer tube to solidify it quickly and the inner and outer tubes maintain respectively separated condition without being bonded by fusing.

Description

【発明の詳細な説明】 （技術分野］ 本発明は可撓管の外側に遊離した状態の可撓性保護管を
有する二重管の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for manufacturing a double-walled tube having a flexible protective tube that is free on the outside of the flexible tube.

（従来技術とその問題点］ 合成樹脂やゴム製の可撓管の外圧や摩擦による損傷を防
ぐために、可撓性の保護管をかぶせる工夫は特殊な場合
には行なわれている。この場合、該保護管は、内部で被
保護管が遊離し自由に動き得る方が剪断力とか捻れなど
が働くような外圧に対して有利な面がある。しかしなが
ら、このような構造の管は、可撓管を保護管の中に挿入
することによシつくられるもので、きわめて長尺の管に
おいてはこのような構造の二重管の製造は不可能であり
、現実にこのような二重管を連絡的に製造する方法は知
られていない。(Prior art and its problems) In order to prevent damage to flexible tubes made of synthetic resin or rubber due to external pressure or friction, a method of covering them with a flexible protective tube has been used in special cases.In this case, It is advantageous for the protective tube to be able to move freely when the protected tube is free from external pressure such as shearing force or twisting. It is made by inserting a tube into a protective tube, and it is impossible to manufacture a double tube with this type of structure for extremely long tubes. There is no known method for manufacturing it in a continuous manner.

Ｃ発明の目的】 本発明は、合成樹脂、ゴム製の可撓性管の外側に読管と
は遊離した状態で可撓性合成樹脂の保護管を被覆した二
重管を連続的に製造する方法を提供せんとするものであ
る。C. Purpose of the Invention The present invention continuously manufactures a double-layered tube in which a protective tube made of flexible synthetic resin is coated on the outside of a flexible tube made of synthetic resin or rubber and is separated from the reading tube. The purpose is to provide a method.

（発明の構成］ 本発明は、可撓性内管の外周に、可撓性合成樹脂の外管
を連続的に押出成形して被覆するに当って、外管を内管
外面と間隔をあけて押出し、同時に内管と外管の間に空
気を吹き込むことにより、外管を内管と遊離した状態で
被覆することを特徴とする可撓性二重管の製造法及び、
可撓性内管のの内管案内孔とその外周に間隔をおいて設
けられた外管押出孔および両孔の間に位置する空気噴出
孔を有することを特徴とする可撓性二重管の製造装置で
ある。(Structure of the Invention) The present invention provides a method for continuously extruding and covering the outer periphery of a flexible inner tube with an outer tube made of flexible synthetic resin, with a space between the outer tube and the outer surface of the inner tube. A method for producing a flexible double tube, characterized in that the outer tube is covered with the inner tube in a loose state by extruding the inner tube and simultaneously blowing air between the inner tube and the outer tube,
A flexible double tube characterized by having an inner guide hole of a flexible inner tube, an outer tube extrusion hole provided at intervals on the outer periphery of the inner tube, and an air jet hole located between both holes. This is the manufacturing equipment.

まず、本発明の可撓性内管は、合成樹脂あるいはゴムか
ら成形され、必要に応じて繊維補強層を内蔵した、あら
かじめ成形された管であシ、外管は可撓性合成樹脂特に
弾力性に富む材料からなる可撓管であって、外管は押出
成形によって、内管の外側に被覆形成されるものである
。その構造は第１図に示す通りでおシ、１は内管、２は
外管であるＯ 本発明を図面によシ詳細に説明する。First, the flexible inner tube of the present invention is a pre-molded tube made of synthetic resin or rubber and has a built-in fiber reinforcing layer if necessary, and the outer tube is made of flexible synthetic resin, especially elastic. The outer tube is formed by extrusion molding to cover the outside of the inner tube. Its structure is as shown in FIG. 1, where 1 is an inner tube and 2 is an outer tube.The present invention will be explained in detail with reference to the drawings.

第２図は本発明の装置の断面例図、第３図はそのＡ−Ａ
断面図であシ、３は内管案内通路、４は同案内孔、５は
空気導入０．６は空気噴出孔、７゜は外管用溶融樹脂案
内通路、８は同押出孔を示す。Fig. 2 is an example cross-sectional view of the device of the present invention, and Fig. 3 is its A-A
In the cross-sectional view, 3 indicates the inner tube guide passage, 4 indicates the guide hole, 5 indicates the air introduction hole, 0.6 indicates the air jet hole, 7° indicates the outer tube molten resin guide passage, and 8 indicates the extrusion hole.

この装置において、あらかじめ成形された内管１は内管
案内通路３を通シ、内管案内孔４よシ引き出される。そ
の際、外管を形成する合成樹脂は通路７．押出孔８を経
て、内管の外側に被覆するように管状に抑圧成形され、
外管２として内管とともに引き取られる。この場合、内
管案内孔４と外管押出孔８とは間隔をおいて配置され、
外管押出時に内管と外管が遊離した状態を形成する。さ
らに本発明においては、空気導入に５よシ導入した空気
を噴出孔６よυ、内管と外管との間に噴出さ゛せ、外管
の少なくと鴫内面を冷却し急速に固化せしめ、空気層に
よって内管と外管とが融着せずそれぞれ遊離された状態
をとるように維持される。In this device, a preformed inner tube 1 is passed through an inner tube guide passage 3 and pulled out through an inner tube guide hole 4. At this time, the synthetic resin forming the outer tube is passed through the passage 7. It passes through the extrusion hole 8 and is compressed into a tubular shape so as to cover the outside of the inner tube.
The outer tube 2 is taken away together with the inner tube. In this case, the inner tube guide hole 4 and the outer tube extrusion hole 8 are arranged at intervals,
When extruding the outer tube, the inner tube and outer tube are separated. Furthermore, in the present invention, the air introduced in step 5 is jetted out through the jetting hole 6 between the inner tube and the outer tube to cool and rapidly solidify at least the inner surface of the outer tube. The layer maintains the inner tube and outer tube so that they are not fused and are separated from each other.

この際の空気圧は、管の成形速度や外管の材質等によシ
異なるが、少くとも外管固化前に外管に変形を与えない
範囲に保持される。一般的にはｏ、ｏｏｉ〜Ｏ，ＯＳ電
ｆ／ｄ程度でよいが、内管外面と外管内面の間隔が非常
に小さくても良いような場合とか、外管用溶融樹脂押出
孔の径が十分大きいような場合、あるいは押出溶融時に
弾性を有する材質のような場合には、特に強制的に空気
を入れなくても（つまシ自然流入だけで）できる。また
空気導入口、噴出口は第２，３図に示すものにおいては
、内管案内道路と隔離されていないが、内管案内孔、外
管押出孔の間に別個独立して設けられても良い。The air pressure at this time varies depending on the molding speed of the tube, the material of the outer tube, etc., but is maintained within a range that does not deform the outer tube at least before the outer tube is solidified. In general, it is sufficient to use f/d of o, ooi to O, OS, but there are cases where the distance between the outer surface of the inner tube and the inner surface of the outer tube may be very small, or when the diameter of the molten resin extrusion hole for the outer tube is If the material is sufficiently large, or if the material is elastic during extrusion and melting, it can be done without forcing air (just natural inflow). Furthermore, in the case shown in Figures 2 and 3, the air inlet and the air outlet are not separated from the inner pipe guideway, but they may be provided separately and independently between the inner pipe guide hole and the outer pipe extrusion hole. good.

また、空気導入口よシ潤滑剤を導入し、噴出口より噴霧
してもよい。こうすることによって被保護管がよ）自由
に動き、外圧や摩擦による損傷を防ぐ効果が大となる。Alternatively, the lubricant may be introduced through the air inlet and sprayed through the spout. This allows the tube to be protected to move more freely and is highly effective in preventing damage caused by external pressure and friction.

本発明におい−〔、内管は流体移送を目的とした本来の
可撓管であシ、各種合成樹脂、ゴムからなり、さらには
繊維補強層を有するもの、各種樹脂。In the present invention, the inner tube is an original flexible tube for the purpose of fluid transfer, and is made of various synthetic resins and rubbers, and further has a fiber-reinforced layer, and various resins.

ゴムの複合管など任意に選択される。これに対して、外
管は内管の保護を目的とするもので、合成樹脂殊に可撓
性９弾力性に富むポリ塩化ビニル。It can be arbitrarily selected such as rubber composite pipe. On the other hand, the outer tube is intended to protect the inner tube, and is made of synthetic resin, especially polyvinyl chloride, which has high flexibility and elasticity.

ナイロン、ポリウレタン、ポリエステル系エラストマー
、ポリスチレン系エラストマー等からつくられることが
望ましい。It is preferably made of nylon, polyurethane, polyester elastomer, polystyrene elastomer, or the like.

【作用効果］ 本発明によれば、可撓性内管が、可撓性外管と遊離した
形態で外管内に保護された二重管を、連続的に製造する
ことができ、得られた管は、全体として可撓性を有する
と共に、外圧が加えられたとき、内管が外管内で一定ス
ペース内で移動でき、しかも外管が弾力性を有している
ため、この外管は内管に対する緩衝材的作用をし、また
、摩擦に対する保護層として作用し、内管に対する保護
効果が大である。さらに、本発明で得られる二重管は、
両管内に空気の層を持つため、内管に対する保温、保冷
効果を有するが、両管の間に水等の流体を積極的に流す
ことによシ、前記保護効果、保温、保冷効果を高めるこ
とも可能である。[Operation and Effect] According to the present invention, it is possible to continuously manufacture a double tube in which the flexible inner tube is protected within the outer tube in a separate form from the flexible outer tube. The tube has flexibility as a whole, and when external pressure is applied, the inner tube can move within a certain space within the outer tube, and the outer tube has elasticity, so the outer tube has elasticity. It acts as a buffer material for the tube and as a protective layer against friction, and has a great protective effect on the inner tube. Furthermore, the double tube obtained by the present invention is
Since there is a layer of air inside both pipes, it has a heat-retaining and cold-retaining effect on the inner pipe, but by actively flowing a fluid such as water between both pipes, the above-mentioned protective effect, heat-retaining, and cold-retaining effect is enhanced. It is also possible.

実施例 軟質ポリ塩化ビニｐからなり、ポリエステＩｖ繊維の補
強グレード層をもつ直径６．３ｍ、肉厚４．０麟の内管
を用い、第２．３図に示す装置によシ、内管、外管の間
に０．００５　＃ｆ７ａ＋′の空気を吹き込みながら、
直径１９．０閣、肉厚１．５■の軟質ポリ塩化ビニル樹
脂の外管を抑圧成形しながら二重管を製造した。これに
よシ、内管と外管とはまったく遊離した二重管を連続的
に製造することができた。Example An inner tube made of soft polyvinyl chloride P and having a reinforcing grade layer of polyester IV fiber and having a diameter of 6.3 m and a wall thickness of 4.0 mm was used. , while blowing air of 0.005 #f7a+' between the outer tubes,
A double tube was manufactured by compression molding an outer tube of soft polyvinyl chloride resin with a diameter of 19.0 mm and a wall thickness of 1.5 mm. As a result, it was possible to continuously manufacture a double tube in which the inner tube and outer tube were completely separated.

これに対して、同樹脂にてそれぞれ別個に製造し　・た
内管と外管を準備し、外管内に内管を挿入して二重管を
製造せんとしたが、スムースに製造できる管長さは２ｍ
程度までであった。In contrast, we prepared an inner tube and an outer tube that were manufactured separately from the same resin, and then inserted the inner tube into the outer tube to manufacture a double tube. is 2m
It was up to a certain extent.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明で製造する二重管を示す正面図。 第２図は本発明装置の断面側図、第３図はそのＡ−Ａ断
面図であ）、１は内管、２は外管、４は内管案内孔、６
は空気噴出孔、８は外管押出孔を示す。FIG. 1 is a front view showing a double pipe manufactured by the present invention. (Fig. 2 is a cross-sectional side view of the device of the present invention, and Fig. 3 is a cross-sectional view taken along line A-A), 1 is an inner pipe, 2 is an outer pipe, 4 is an inner pipe guide hole, and 6 is a cross-sectional view of the device of the present invention.
8 indicates an air ejection hole, and 8 indicates an outer tube extrusion hole.

Claims (1)

【特許請求の範囲】 １、可撓性内管の外周に、可撓性合成樹脂の外管を連続
的に押出成形して被覆するに当って、外管を内管外面と
間隔をあけて押出し、同時に内管と外管の間に空気を吹
き込むことにより、外管を内管と遊離した状態で被覆す
ることを特徴とする可撓性二重管の製造法。 ２、可撓性内管の外周に可撓性合成樹脂の外管を連続的
に押出成形する二重管の成形装置のダイ部分において、
中心部の内管案内孔とその外周に間隔をおいて設けられ
た外管押出孔および両孔の間に位置する空気噴出孔を有
することを特徴とする可撓性二重管の製造装置。[Claims] 1. When continuously extruding and covering the outer circumference of the flexible inner tube with a flexible synthetic resin outer tube, the outer tube is spaced apart from the outer surface of the inner tube. A method for manufacturing a flexible double tube, characterized in that the outer tube is covered with the inner tube in a loose state by extruding and simultaneously blowing air between the inner tube and the outer tube. 2. In the die part of a double tube molding device that continuously extrudes a flexible synthetic resin outer tube onto the outer periphery of a flexible inner tube,
1. An apparatus for manufacturing a flexible double tube, comprising an inner tube guide hole in the center, an outer tube extrusion hole provided at intervals on the outer periphery of the inner tube guide hole, and an air jet hole located between the two holes.
JP59188689A 1984-09-07 1984-09-07 Method and device for manufacturing flexible double tube Pending JPS6164423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59188689A JPS6164423A (en) 1984-09-07 1984-09-07 Method and device for manufacturing flexible double tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59188689A JPS6164423A (en) 1984-09-07 1984-09-07 Method and device for manufacturing flexible double tube

Publications (1)

Publication Number Publication Date
JPS6164423A true JPS6164423A (en) 1986-04-02

Family

ID=16228110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59188689A Pending JPS6164423A (en) 1984-09-07 1984-09-07 Method and device for manufacturing flexible double tube

Country Status (1)

Country Link
JP (1) JPS6164423A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017194078A (en) * 2016-04-18 2017-10-26 株式会社ディスコ Process of manufacture of double piping
JP2018501977A (en) * 2014-10-22 2018-01-25 ブリティッシュ アメリカン タバコ （インヴェストメンツ） リミテッドＢｒｉｔｉｓｈ Ａｍｅｒｉｃａｎ Ｔｏｂａｃｃｏ （Ｉｎｖｅｓｔｍｅｎｔｓ） Ｌｉｍｉｔｅｄ Manufacturing method of double wall pipe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5373258A (en) * 1976-12-10 1978-06-29 Tigers Polymer Reinforced hose production apparatus
JPS58172815A (en) * 1982-04-02 1983-10-11 株式会社フジクラ Method and apparatus for simultaneously extruding multilayer of insulator to be covered

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5373258A (en) * 1976-12-10 1978-06-29 Tigers Polymer Reinforced hose production apparatus
JPS58172815A (en) * 1982-04-02 1983-10-11 株式会社フジクラ Method and apparatus for simultaneously extruding multilayer of insulator to be covered

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018501977A (en) * 2014-10-22 2018-01-25 ブリティッシュ アメリカン タバコ （インヴェストメンツ） リミテッドＢｒｉｔｉｓｈ Ａｍｅｒｉｃａｎ Ｔｏｂａｃｃｏ （Ｉｎｖｅｓｔｍｅｎｔｓ） Ｌｉｍｉｔｅｄ Manufacturing method of double wall pipe
JP2017194078A (en) * 2016-04-18 2017-10-26 株式会社ディスコ Process of manufacture of double piping

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