JPH06123393A - Manufacture of electric fusing joint - Google Patents

Manufacture of electric fusing joint

Info

Publication number
JPH06123393A
JPH06123393A JP4271804A JP27180492A JPH06123393A JP H06123393 A JPH06123393 A JP H06123393A JP 4271804 A JP4271804 A JP 4271804A JP 27180492 A JP27180492 A JP 27180492A JP H06123393 A JPH06123393 A JP H06123393A
Authority
JP
Japan
Prior art keywords
sleeve
joint
heating
joints
linear
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.)
Granted
Application number
JP4271804A
Other languages
Japanese (ja)
Other versions
JP3265405B2 (en
Inventor
Yoshihiro Kishida
喜廣 岸田
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.)
TOKUSHU KOGYO KK
Original Assignee
TOKUSHU KOGYO KK
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 TOKUSHU KOGYO KK filed Critical TOKUSHU KOGYO KK
Priority to JP27180492A priority Critical patent/JP3265405B2/en
Priority to CN93103052A priority patent/CN1096246A/en
Publication of JPH06123393A publication Critical patent/JPH06123393A/en
Application granted granted Critical
Publication of JP3265405B2 publication Critical patent/JP3265405B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B29C65/3432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B29C65/348—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic with a polymer coating
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/362—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B29C65/3632—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3684—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being non-metallic
    • B29C65/3696—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being non-metallic with a coating
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

PURPOSE:To provide a method capable of manufacturing a highly precise and hard electric fusing joint with an extremely simple process. CONSTITUTION:A sleeve S is formed by a covered linear heating element coil, the sleeve S is inserted into a joint A early after the joint A is molded by injection, and the joint A is cooled and solidified, and integrated with the sleeve S.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、熱可塑性高分子材料
製管類を接続する電気融着継手の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electric fusion joint for connecting pipes made of a thermoplastic polymer material.

【０００２】[0002]

【従来の技術】高分子材料、特に熱可塑性の樹脂または
ゴムからなる管類、継手類または弁栓類等を、漏洩など
が起こらないように接続して、円滑な配管施工を可能に
するためには、それぞれの接続部を密に封じる必要があ
る。ところが、たとえば、ＡＢＳ樹脂、ポリ塩化ビニ
ル、ポリスチレンなどの限られた高分子材料に対しては
それぞれに適した接着剤が開発されていて、それらを接
続部に適宜塗布して硬化させれば、容易に目的を果たす
ことができるが、ポリオレフィン、ポリアミド、ポリア
セタール、フッ素含有樹脂など多くのものに対しては適
当な接着剤は未だ得られていない。そこで、このような
接着剤のない高分子材料に対しては、接続する部分を外
熱法（火炎または管状炉など）によって硬化もしくは溶
融させて冷却しない間に一気に接合させ、冷却固化させ
る方法が採られている。しかし、このような外熱方法で
は均一に加熱することおよび適当な軟化もしくは溶融の
状態に調整維持することがきわめて難しく、良い結果が
得られない。2. Description of the Related Art To connect pipes, joints or valve plugs made of a polymer material, particularly thermoplastic resin or rubber, in a leak-proof manner to enable smooth piping work. Requires that each connection be tightly sealed. However, for example, an adhesive suitable for each of limited polymer materials such as ABS resin, polyvinyl chloride, and polystyrene has been developed, and if they are appropriately applied to the connection portion and cured, Although it can easily serve its purpose, no suitable adhesive has been obtained yet for many materials such as polyolefins, polyamides, polyacetals, and fluorine-containing resins. Therefore, for such a polymer material without an adhesive, there is a method in which the connecting portion is hardened or melted by an external heating method (such as a flame or a tubular furnace) and then joined at a stretch while it is not cooled and then cooled and solidified. Has been taken. However, with such an external heating method, it is extremely difficult to uniformly heat and adjust and maintain a proper softened or melted state, and good results cannot be obtained.

【０００３】そこで、例えば特願平１−１０６８９号に
おいて、互に接触することなく平行して螺旋（らせん）
状に巻き上げられた線状発熱体が、中空の筒状体に成形
された熱可塑性高分子材料層の中に封入された状態にあ
るジョイント用スリーブが開示されている。しかし、こ
のジョイント用スリーブを使用する場合に、ジョイント
部にスリーブを挿入して、管類を接続し、その状態を維
持しながら通電して融着させた後冷却固化させることな
どに複雑な操作と長い時間が必要であるなどの欠点があ
る。Therefore, for example, in Japanese Patent Application No. 1-10689, a spiral is formed in parallel without contacting each other.
Disclosed is a joint sleeve in which a linear heating element wound up in a circular shape is enclosed in a thermoplastic polymer material layer formed into a hollow cylindrical body. However, when using this joint sleeve, a complicated operation such as inserting the sleeve into the joint part, connecting the pipes, energizing and fusion-bonding while maintaining that state, and then cooling and solidifying is performed. And there are drawbacks such as requiring a long time.

【０００４】そこで、例えば、特願平２−２７９３号に
開示されているように、被覆発熱線状体コイルを予め継
手内に一体成形したり、或は特願平２−１８８８２１号
に開示されているように被覆発熱線状体コイルで形成し
たスリーブを継手類と一体成形しておくことが提案され
ている。Therefore, for example, as disclosed in Japanese Patent Application No. 2-2793, a coated heating linear coil is integrally molded in advance in a joint, or disclosed in Japanese Patent Application No. 2-188821. As described above, it has been proposed to integrally form the sleeve formed of the coated heating linear coil with the joints.

【０００５】[0005]

【発明の課題】しかしながら、上記のようなコイル又は
スリーブをインサート成形するのは、技術的に非常に難
しく、コスト高で、精度の高い製品を得ることが困難で
ある。However, it is technically very difficult to insert-mold the above-mentioned coil or sleeve, and it is difficult to obtain a product with high cost and high accuracy.

【０００６】そこで、この発明の課題は、極めて簡単な
工程で高精度の電気融着継手を得ることができる製造方
法を提供することである。[0006] Therefore, an object of the present invention is to provide a manufacturing method capable of obtaining a highly accurate electric fusion joint by an extremely simple process.

【０００７】[0007]

【課題の解決手段】上記の課題を解決するため、この発
明においては、被覆線状発熱体コイルによってスリーブ
を形成し、継手類を射出成形した後、早い時期に前記ス
リーブを継手類の内部に挿入し、継手類を冷却固化して
前記スリーブを一体化する方法を採用したのである。In order to solve the above-mentioned problems, in the present invention, a sleeve is formed by a coated wire heating element coil, and after the joints are injection-molded, the sleeve is placed inside the joints at an early stage. The sleeve was inserted and the joints were cooled and solidified to integrate the sleeve.

【０００８】[0008]

【作用】継手類を射出成形して型から取り出した直後に
は、いまだ完全に固化されておらず、この継手類の内部
にスリーブを挿入した後、完全に冷却させると継手類が
収縮するため、スリーブが圧縮保持される。[Operation] Immediately after the joints are injection-molded and taken out of the mold, the joints are not completely solidified yet. If the sleeves are inserted into the joints and completely cooled, the joints contract. , The sleeve is compressed and held.

【０００９】[0009]

【実施例】以下、この発明の実施例を添付図面に基づい
て説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.

【００１０】まで、スリーブの形成方法について説明す
る。The method of forming the sleeve will be described below.

【００１１】図１に示すように、マンドレルＭに被覆線
状発熱体１を二つ折りにして巻き付ける。As shown in FIG. 1, the coated linear heating element 1 is folded in two and wound around the mandrel M.

【００１２】内蔵される発熱線２はたとえばニクロム
線、炭素繊維のように通電すれば発熱する性質を有する
素材からなる線状のものであり、また、このような発熱
線２を被覆する熱可塑性高分子材料被覆材は接続しよう
とする管類の材質と同系のもの、または親和性の大きい
ものが望ましい。具体的には、ＡＢＳ樹脂、ポリ塩化ビ
ニル、ポリスチレン、ポリオレフィン、ポリアミド、ポ
リアセタール、フッ素樹脂などを例示することができ
る。そして、これら被覆材に内蔵される発熱線の本数は
特に限定するものではないが、１本または２本が実用的
である。しかし、１本の発熱線を内蔵する被覆線状体を
単独で螺旋に巻くと、その端子は螺旋コイルの両端に位
置することになり、接続しようとする管類の外部に一端
を取り出させても、他の端を同じように外部に取り出す
ことは容易ではないという問題点がある。したがって、
１本の発熱線を内蔵する被覆線状体であっても、それを
図１のように二つ折りに曲げるか、または別個の被覆線
状体を２本平行かつ密着させて（両被覆線状体の発熱線
の一端同志を接続する必要はあるが）螺旋状に巻けば、
二つの端子を同じ方向に取り出すことは可能となる。こ
れに対して、２本の発熱線２が予め内蔵されている被覆
線状体であれば、図２に示すように、被覆線状体１の一
端を露呈する２本の発熱線２を適宜結線するのみで、よ
り簡単な操作によって両端子を螺旋コイルの同じ場所に
取り出すことができるので好都合である。いずれにして
も被覆材層の厚み、螺旋の径などは、配管施工の際に対
象となる管類の寸法、形状等に応じて、線状発熱体１の
寸法などと共に適宜選定すればよく、特に限定されるも
のではない。ただ、螺旋状に巻かれた被覆線状体の被覆
が加熱されて、被覆材が軟化溶融したときでも隣接して
いる線状発熱体同志が移動して接触したり交差したりし
ないように一定の間隙を維持できるためには、特に２本
の発熱線を内蔵する被覆線状体の場合には、丸形より平
形とすることが望ましい。The built-in heating wire 2 is a linear wire made of a material having a property of generating heat when energized, such as a nichrome wire or carbon fiber, and a thermoplastic material for covering such a heating wire 2 is used. It is desirable that the polymer material coating material be of the same type as the material of the pipes to be connected or have a high affinity. Specific examples include ABS resin, polyvinyl chloride, polystyrene, polyolefin, polyamide, polyacetal, and fluororesin. The number of heating wires built in these coating materials is not particularly limited, but one or two is practical. However, when the coated wire body containing one heating wire is wound in a spiral, the terminals are located at both ends of the spiral coil, and one end is taken out of the tubing to be connected. However, there is a problem that it is not easy to take out the other end to the outside in the same manner. Therefore,
Even if it is a covered wire body containing one heating wire, it should be folded in two as shown in Fig. 1 or two separate covered wire bodies should be in parallel and in close contact (both covered wire It is necessary to connect one end of the heating wire of the body to each other)
It is possible to take out the two terminals in the same direction. On the other hand, in the case of a covered linear body in which the two heating wires 2 are incorporated in advance, as shown in FIG. 2, the two heating wires 2 exposing one end of the covered linear body 1 are appropriately used. It is convenient that both terminals can be taken out to the same place of the spiral coil by a simpler operation only by connecting them. In any case, the thickness of the coating material layer, the diameter of the spiral, etc. may be appropriately selected together with the dimensions of the linear heating element 1 in accordance with the dimensions, shape, etc. of the target pipes during piping construction, It is not particularly limited. However, even when the coating of the spirally wound coated linear body is heated and the coating material softens and melts, the adjacent linear heating elements do not move and do not come in contact with or intersect each other. In order to maintain the gap, it is preferable to use a flat shape rather than a round shape, especially in the case of a covered linear body containing two heating wires.

【００１３】次に、図１に示す螺旋コイルＣの一端の発
熱線２に通電すると、熱可塑性高分子材料から成る被覆
が溶融して、隣接する線状体１が互に接合され、螺旋コ
イルＣは一体のスリーブＳとなる。Next, when the heating wire 2 at one end of the spiral coil C shown in FIG. 1 is energized, the coating made of the thermoplastic polymer material is melted and the adjacent linear bodies 1 are bonded to each other, and the spiral coil is wound. C becomes an integral sleeve S.

【００１４】或は被覆材の融点以上（たとえば被覆材が
ポリエチレンの場合１５０℃程度）に別途加熱された熱
器具（従来プラスチックの溶接に用いられる熱風溶接、
熱棒、熱刃もしくは熱板溶接、インパルス溶接、高周波
溶接、超音波溶接などいずれの溶接方法であってもよい
が、最も簡便で設備費も少なくて好ましいのは内熱式若
しくは外熱式の熱板である。）を螺旋コイルの周方向の
少なくとも１箇所に接触させて図２及び図３に示すよう
に、被覆融着部３を設けるとスリーブＳが得られる。螺
旋コイルの表面に熱器具が触れると被覆材は直ちに溶融
し、隣接する被覆材同志がその部分で融着し、熱器具が
遠のくと直ちに冷却して固化する。したがって、前記の
被覆線状体全体を通電によって加熱溶融しさらに冷却す
る技術と比較すれば溶融したり冷却したりする樹脂量は
きわめて少ないので、被覆融着部３の形成に要する時間
を非常に短縮することができる。Alternatively, a heating device separately heated above the melting point of the coating material (for example, about 150 ° C. when the coating material is polyethylene) (hot-air welding conventionally used for welding plastics,
Any welding method such as hot rod, hot blade or hot plate welding, impulse welding, high frequency welding, ultrasonic welding, etc. may be used, but the most simple and low equipment cost is preferable, and the internal heating type or the external heating type is preferable. It is a hot plate. ) Is brought into contact with at least one position in the circumferential direction of the spiral coil to provide the coating fusion bonding portion 3 as shown in FIGS. 2 and 3, whereby the sleeve S is obtained. When the heating device touches the surface of the spiral coil, the coating material immediately melts, adjacent coating materials melt at that portion, and when the heating device becomes far, the coating material immediately cools and solidifies. Therefore, the amount of resin that melts or cools is extremely small as compared with the technique of heating and melting the entire coated linear body by energization and further cooling, so that the time required for forming the coated fusion-bonded portion 3 is extremely small. It can be shortened.

【００１５】このようにしてスリーブＳを用意してお
き、管継手を射出成形する。管継手の形状は、例えば図
４又は図５に示すもののほかに、Ｔ字形、十字形等いず
れでもよい。材質も前記のような熱可塑性高分子材料か
ら適宜選択すればよい。The sleeve S is prepared in this way, and the pipe joint is injection-molded. The shape of the pipe joint may be, for example, a T shape, a cross shape, etc. other than the shape shown in FIG. 4 or FIG. The material may be appropriately selected from the above thermoplastic polymer materials.

【００１６】管継手Ａを成形した直後に、予め用意した
スリーブＳを継手内に挿入する。このとき、継手の収縮
率を考慮に入れて、予め継手の内径に対するスリーブの
外径を定めておくのは勿論のことである。Immediately after molding the pipe joint A, a sleeve S prepared in advance is inserted into the joint. At this time, it goes without saying that the outer diameter of the sleeve with respect to the inner diameter of the joint is determined in advance in consideration of the shrinkage rate of the joint.

【００１７】スリーブを挿入後、継手Ａが冷却固化する
まで放置する。期間は３日程度である。After inserting the sleeve, the joint A is left until it is cooled and solidified. The period is about 3 days.

【００１８】なお、図示のように、スリーブＳの外端部
外周に予めカラー４を形成しておき、継手Ａの内周面に
前記カラー４に対応する周溝４ａを形成しておくのが好
ましい。As shown in the drawing, the collar 4 is formed in advance on the outer periphery of the outer end of the sleeve S, and the peripheral groove 4a corresponding to the collar 4 is formed on the inner peripheral surface of the joint A. preferable.

【００１９】出来上がった継手Ａ内には、スリーブＳが
しっかりと保持され、ガタが全くなく取り扱い中に脱落
することもなかった。The sleeve S was firmly held in the finished joint A, had no play, and did not fall off during handling.

【００２０】[0020]

【効果】この発明によれば、以上のように、射出成形直
後の管継手内に線状発熱体コイルから成るスリーブを挿
入することによって電気融着継手を形成したので、イン
サート成形のような複雑な装置を必要とせず、極めて簡
単な操作で線状発熱体を内蔵した管継手を製造すること
ができ、しかも得られた製品は高精度でかつ堅牢である
等の利点を有する。As described above, according to the present invention, the electric fusion-bonded joint is formed by inserting the sleeve made of the linear heating element coil into the pipe joint immediately after the injection molding. It is possible to manufacture a pipe joint incorporating a linear heating element by an extremely simple operation without requiring any special device, and the obtained product has advantages such as high accuracy and robustness.

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明の管継手の製造に用いるスリーブの作
製方法を示す側面図FIG. 1 is a side view showing a method for manufacturing a sleeve used for manufacturing the pipe joint of the present invention.

【図２】同上の他の作製方法を示す側面図FIG. 2 is a side view showing another manufacturing method of the same.

【図３】同上のスリーブの正面図FIG. 3 is a front view of the above sleeve.

【図４】管継手の製造方法を示す一部縦断側面図FIG. 4 is a partially longitudinal side view showing a method for manufacturing a pipe joint.

【図５】同上の他の例を示す一部縦断側面図FIG. 5 is a partially longitudinal side view showing another example of the above.

【符号の説明】[Explanation of symbols]

１ 被覆線状発熱体 ２ 発熱線 ３ 融着部 ４ カラー ４ａ 周溝 Ａ 管継手 Ｃ 螺旋コイル Ｍ マンドレル Ｓ スリーブ DESCRIPTION OF SYMBOLS 1 Coated linear heating element 2 Heating wire 3 Fusion part 4 Collar 4a Circumferential groove A Pipe joint C Spiral coil M Mandrel S Sleeve

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 被覆線状発熱体コイルによってスリーブ
を形成し、継手類を射出成形した後、早い時期に前記ス
リーブを継手類の内部に挿入し、継手類を冷却固化して
前記スリーブを一体化することから成る電気融着継手の
製造方法。1. A sleeve is formed of a coated linear heating element coil, and after the joints are injection molded, the sleeve is inserted into the joints at an early stage and the joints are cooled and solidified to integrate the sleeves. A method of manufacturing an electric fusion joint comprising:
JP27180492A 1992-10-09 1992-10-09 Manufacturing method of electrofusion joint Expired - Fee Related JP3265405B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP27180492A JP3265405B2 (en) 1992-10-09 1992-10-09 Manufacturing method of electrofusion joint
CN93103052A CN1096246A (en) 1992-10-09 1993-03-26 Make the method for electric heating smelting pipe joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27180492A JP3265405B2 (en) 1992-10-09 1992-10-09 Manufacturing method of electrofusion joint

Publications (2)

Publication Number Publication Date
JPH06123393A true JPH06123393A (en) 1994-05-06
JP3265405B2 JP3265405B2 (en) 2002-03-11

Family

ID=17505086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27180492A Expired - Fee Related JP3265405B2 (en) 1992-10-09 1992-10-09 Manufacturing method of electrofusion joint

Country Status (2)

Country Link
JP (1) JP3265405B2 (en)
CN (1) CN1096246A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2559547A1 (en) * 2011-08-19 2013-02-20 Friatec Aktiengesellschaft Mounting system to weld plastic tubular components
JP2021001618A (en) * 2019-06-20 2021-01-07 日立金属株式会社 Electric fusion plug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102364197A (en) * 2011-11-18 2012-02-29 王崇高 Press-in type plastic pipe joint
CN105135133B (en) * 2015-08-20 2017-08-29 张家港昌达实业有限公司 A kind of two dimension winding wiring unit and the wiring method using its progress

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2559547A1 (en) * 2011-08-19 2013-02-20 Friatec Aktiengesellschaft Mounting system to weld plastic tubular components
JP2021001618A (en) * 2019-06-20 2021-01-07 日立金属株式会社 Electric fusion plug

Also Published As

Publication number Publication date
JP3265405B2 (en) 2002-03-11
CN1096246A (en) 1994-12-14

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