JPH07117130A - Plastic tube connecting method - Google Patents

Plastic tube connecting method

Info

Publication number
JPH07117130A
JPH07117130A JP5265232A JP26523293A JPH07117130A JP H07117130 A JPH07117130 A JP H07117130A JP 5265232 A JP5265232 A JP 5265232A JP 26523293 A JP26523293 A JP 26523293A JP H07117130 A JPH07117130 A JP H07117130A
Authority
JP
Japan
Prior art keywords
joint
sheet
heat
powder
plastic pipe
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
JP5265232A
Other languages
Japanese (ja)
Inventor
Naoshi Ishimaru
直志 石丸
Kazuhiko Iwata
一彦 岩田
Yasuo Watanabe
泰夫 渡邊
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP5265232A priority Critical patent/JPH07117130A/en
Publication of JPH07117130A publication Critical patent/JPH07117130A/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
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1425—Microwave radiation
    • 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
    • B29C65/3608—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 single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3612—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 single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • B29C65/487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical
    • B29C65/4875—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical being spherical, e.g. particles or powders
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • B29C65/4885—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their composition being non-plastics
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-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
    • 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)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

PURPOSE:To connect a plastic tube and a joint even when the joint does not have a self fusing property, as well as in the case that the joint has the self heat fusing property equipped with a heating wire or a heating element embedded therein. CONSTITUTION:A thermoplastic resin tape 2 in which a ferrite powder is mixed is wound on a tube end of a plastic tube 1 and inserted into a socket joint 3 from both sides. By using a heating device 4 consisting of a high-frequency generating device, an electrode core and an excitation coil, an alternating field of 1-400kHz is generated so as to heat the ferrite powder in the tape and to fuse it.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は、プラスチック管を継手
を用いて接合する接合方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method for joining plastic pipes using a joint.

【０００２】[0002]

【従来技術】プラスチック管の接合は従来、継手とプラ
スチック管の互いの接触面をヒータにより加熱溶融した
のち、継手をプラスチック管管端部に差込むか、プラス
チック管外周面に側方より押付けて熱融着することによ
り行われていたが、近年、継手本体の内側に電熱線をコ
イル状に埋設したエレクトロフュージョン継手を用い、
プラスチック管に取付後、継手に設定時間給電して電熱
線の発熱により加熱溶融する方法が開発された。2. Description of the Related Art Conventionally, the joining of plastic pipes has been accomplished by heating and melting the contact surfaces of the joint and the plastic pipe with a heater, and then inserting the joint into the end of the plastic pipe or pressing it against the outer peripheral surface of the plastic pipe from the side. Although it was performed by heat fusion, in recent years, using an electrofusion joint in which a heating wire is embedded in a coil shape inside the joint body,
A method has been developed in which, after being attached to a plastic pipe, power is supplied to the joint for a set period of time to heat and melt by the heat generated by the heating wire.

【０００３】発熱により熱融着を行う自己熱融着性の継
手を用いたプラスチック管の接合方法としてはこのほ
か、特開昭５６−５００３６号に開示されるように、継
手の内側面に切設した環状溝内に、樹脂の溶融温度範囲
内にキュリー点を有する強磁性体の金属粉を混入した熱
可塑性ポリマーよりなる導電性材料を埋設し、誘導電流
発生装置により１０〜５００ＫＨｚの周波数を有する交
番磁界を発生させて、これにより金属粉に渦電流を生じ
させて加熱する方法、特開平１−３２５２６１号に開示
されるように、誘導損失係数が０．１以上の誘導損失係
数の比較的高い樹脂３０〜６０重量％と、プラスチック
管と同材質の熱可塑性樹脂材料との混練物からなり、射
出形成により予め成形した円環状のコアをプラスチック
管の外周面に接して設け、マイクロ波の照射によりコア
を発熱させ加熱する方法などが知られる。また発熱体を
含む樹脂に関しては、特開平３−２８５９２４号に樹脂
に磁性粉を混入し、これを磁界発生装置によって印加さ
れる交番磁界による磁気ヒステリシス損により発熱させ
るようにしたものも知られる。As a method of joining a plastic pipe using a self-heat-sealing joint that heat-seals by heat generation, as described in Japanese Patent Laid-Open No. 56-50036, the inner surface of the joint is cut. A conductive material made of a thermoplastic polymer mixed with ferromagnetic metal powder having a Curie point within the melting temperature range of the resin is embedded in the provided annular groove, and a frequency of 10 to 500 KHz is generated by an induced current generator. A method of generating an alternating magnetic field having the above and thereby generating an eddy current in the metal powder to heat the powder, as disclosed in JP-A-1-325261, comparison of induction loss coefficients having an induction loss coefficient of 0.1 or more. Made of a kneaded material of 30 to 60% by weight of high resin and a thermoplastic resin material of the same material as the plastic pipe, and an annular core preformed by injection molding is in contact with the outer peripheral surface of the plastic pipe. Only, a method of heating is heating the core by microwave irradiation is known. Regarding the resin containing a heating element, there is known Japanese Patent Laid-Open No. 3-285924 in which magnetic powder is mixed with resin to generate heat by magnetic hysteresis loss due to an alternating magnetic field applied by a magnetic field generator.

【０００４】[0004]

【発明が解決しようとする課題】自己熱融着性の継手を
用いたプラスチック管の接合方法によれば、継手とプラ
スチック管の互いの接触面をヒータにより加熱溶融した
のち、継手をプラスチック管に取付けて熱融着する方法
に比べ、接続作業を容易かつ迅速に行うことができて作
業効率が向上し、接合を比較的確実に行うことができる
が、この種プラスチック管の接合には、電熱線を埋設し
た継手や発熱体を埋設した継手など、特別な継手を使用
せねばならない。According to the method for joining plastic pipes using a self-heat-welding joint, the joint and the plastic pipe are heated and melted by a heater, and then the joint is formed into a plastic pipe. Compared with the method of attaching and heat-sealing, the connection work can be performed easily and quickly, the work efficiency is improved, and the joining can be performed relatively reliably. Special fittings must be used, such as fittings with embedded hot wires or heating elements.

【０００５】本発明の目的は、電熱線や発熱体を埋設し
ない熱可塑性の継手を用い、プラスチック管との接合を
自己熱融着性の継手を用いたときと同様にして行うこと
ができるような接合方法を提供しようとするものであ
る。An object of the present invention is to use a thermoplastic joint in which a heating wire or a heating element is not buried, and to join it with a plastic pipe in the same manner as when using a self-heat-welding joint. It is intended to provide a simple joining method.

【０００６】[0006]

【課題の解決手段】本発明のプラスチック管の接合方法
は、磁性酸化鉄粉、フェライト粉或いはこられの混合物
よりなる磁性粉（以下単に磁性粉という）を混入した熱
可塑性の樹脂よりなるシートないしテープ（以下単にシ
ート等という）を用い、シート等をプラスチック管管端
部に巻付けて継手に差込むか、或いはシート等をプラス
チック管外周面に当てゝからサドル継手を押当て固定状
態にしたのち、高周波発生装置と電極コア及び励磁コイ
ルで構成された加熱装置を用いて１〜４００ＫＨｚの交
番磁界を発生させ、磁性粉の発熱によって熱融着するこ
とを特徴とするものである。The method for joining plastic pipes according to the present invention is a sheet or a sheet made of a thermoplastic resin mixed with magnetic powder (hereinafter referred to as magnetic powder) composed of magnetic iron oxide powder, ferrite powder or a mixture thereof. Wrap the sheet around the end of the plastic pipe with tape (hereinafter simply referred to as the sheet) and insert it into the joint, or press the seat against the outer peripheral surface of the plastic pipe and press the saddle joint to fix it. After that, an alternating magnetic field of 1 to 400 KHz is generated using a heating device composed of a high frequency generator, an electrode core and an exciting coil, and heat fusion is caused by heat generation of the magnetic powder.

【０００７】別の接合方法は、樹脂の溶融温度範囲内に
キュリー点を有する強磁性体の金属粉を混入した熱可塑
性樹脂よりなるシート等を用い、シート等をプラスチッ
ク管管端部に巻付けて継手に差込むか、或いはシート等
をプラスチック管外周面に当てゝからサドル継手に押当
て固定状態にしたのち、誘導電流発生装置により１０〜
５００ＫＨｚの周波数を有する交番磁界を発生させ、金
属粉に渦電流を生じさせて発熱し熱融着することを特徴
とするものである。Another joining method is to use a sheet or the like made of a thermoplastic resin mixed with ferromagnetic metal powder having a Curie point within the melting temperature range of the resin, and wind the sheet or the like around the end of the plastic pipe. 10) by using an induced current generator after inserting the sheet into the joint or pressing a sheet etc. to the outer peripheral surface of the plastic pipe and pressing it to the saddle joint to fix it.
It is characterized in that an alternating magnetic field having a frequency of 500 KHz is generated to generate an eddy current in the metal powder to generate heat and thermally fuse.

【０００８】更に別の方法は、シート等を誘導損失係数
が０．１以上の樹脂３０〜６０重量％を含有した熱可塑
性樹脂材料より構成し、誘導電流発生装置よりマイクロ
波を照射してシート等を発熱させ、熱融着することを特
徴とするものである。Yet another method is to construct a sheet or the like from a thermoplastic resin material containing 30 to 60% by weight of a resin having an inductive loss coefficient of 0.1 or more, and irradiate the sheet with microwaves from an induced current generator. It is characterized in that the above materials are heated and heat-sealed.

【０００９】[0009]

【作用】誘導加熱装置を用いて交番磁界を発生させたと
き、シート等に混入された磁性粉が磁気ヒステリシス損
失により、或いは金属粉が渦電流により発熱し、またマ
イクロ波を当てることにより誘導損失係数の高い樹脂が
発熱する。本発明で用いられるシートに混入される磁性
粉の磁気特性は、飽和磁化Ｏｓが５０ｅｍｕ／ｇ以上
で、保磁力Ｈｃが５０Ｏｅ以上であり、樹脂との混合割
合は、磁性粉の保磁力Ｈｃが５０〜２００Ｏｅの場合、
磁性粉が５０〜９０重量％、好ましくは５０〜８５重量
％である。この場合、磁性粉が５０重量％未満である場
合には、最大磁束密度Ｂｒが１０００Ｇ以上の発熱材が
得られ難く、短時間での発熱効果が低い。磁性粉が９０
重量％を越える場合には、磁性粉の樹脂中への充填及び
分散性が困難となる。[Function] When an alternating magnetic field is generated using an induction heating device, magnetic powder mixed in a sheet or the like causes magnetic hysteresis loss, or metal powder heats up due to eddy current, and an induction loss occurs when microwave is applied. Resin with a high coefficient generates heat. The magnetic properties of the magnetic powder mixed in the sheet used in the present invention are such that the saturation magnetization Os is 50 emu / g or more, the coercive force Hc is 50 Oe or more, and the mixing ratio with the resin is such that the coercive force Hc of the magnetic powder is In the case of 50-200 Oe,
The magnetic powder is 50 to 90% by weight, preferably 50 to 85% by weight. In this case, when the magnetic powder is less than 50% by weight, it is difficult to obtain a heat generating material having a maximum magnetic flux density Br of 1000 G or more, and the heat generating effect in a short time is low. 90 magnetic powder
When the content exceeds the weight%, it becomes difficult to fill and disperse the magnetic powder in the resin.

【００１０】磁性粉の保磁力Ｈｃが２００Ｏｅを越える
場合の樹脂との混合割合は、磁性粉が５０重量％未満、
好ましくは５〜３０重量％である。磁性粉が５０重量％
を越えると、発熱効果が大き過ぎ、場合によっては樹脂
の劣化を招く可能性が大きい。有効な発熱を得るために
必要な磁性粉の量を考慮すれば、その下限値は０、１重
量％である。When the coercive force Hc of the magnetic powder exceeds 200 Oe, the mixing ratio with the resin is less than 50% by weight of the magnetic powder,
It is preferably 5 to 30% by weight. 50% by weight of magnetic powder
If it exceeds, the heat generation effect is too large, and there is a high possibility that the resin may be deteriorated in some cases. Considering the amount of magnetic powder required to obtain effective heat generation, the lower limit value is 0, 1% by weight.

【００１１】磁性粉の形状は、立方体状のもの、球状の
もの、六角形状のもの、針状のものなどいずれでもよ
い。球状のもの、立方体状のものは平均径で０．１μｍ
以上のものが好ましく、針状のものは長径が０．１μｍ
以上、短径が０．０１μｍ以上であることが望ましい。
本発明の継手やプラスチック管に用いられる熱可塑性樹
脂としては、例えばポリプロピレン、ポリエチレン等の
ポリオレフィン、ポリ塩化ビニール、ポリスチレン、こ
れらのコポリマー等が例示され、なかでも炭素数２〜２
０のポリオレフィン、とくに炭素数２〜１２のエチレ
ン、プロピレン、ブテン−１、４−メチルペンテン−１
などのα−オレフィンの単独または共重合体が好ましい
例として挙げられる。The shape of the magnetic powder may be cubic, spherical, hexagonal or needle-like. Spherical and cube-shaped ones have an average diameter of 0.1 μm
The above is preferable, and the needle-shaped one has a major axis of 0.1 μm.
As described above, it is desirable that the minor axis is 0.01 μm or more.
Examples of the thermoplastic resin used for the joint and the plastic pipe of the present invention include polyolefins such as polypropylene and polyethylene, polyvinyl chloride, polystyrene, and copolymers thereof. Among them, the number of carbon atoms is 2 to 2.
0 polyolefin, especially ethylene, propylene, butene-1,4-methylpentene-1 having 2 to 12 carbon atoms
Preferred examples include α-olefin homopolymers and copolymers.

【００１２】磁性粉を混入した樹脂よりなるシートは、
絶縁性を有し、保磁力Ｈｃが５０Ｏｅ以上、最大磁束密
度ＢM が１０００Ｇ以上、好ましくは１２００Ｇ以上で
ある。保磁力Ｈｃが５０Ｏｅ未満であると、磁気ヒステ
リシス損が小さ過ぎ、また磁性粉の最大磁束密度ＢM が
１０００Ｇ未満である場合、または磁性粉の残留磁束密
度Ｂｒ／保磁力Ｈｃが１．３未満である場合には、磁気
ヒステリシス損が小さくなり、十分な発熱が得られない
ことがある。従って、残留磁束密度Ｂｒ／保磁力Ｈｃが
１．３以上の磁性を有するものとすると、好結果が得ら
れることが多い。The sheet made of resin mixed with magnetic powder is
It has an insulating property, a coercive force Hc of 50 Oe or more, and a maximum magnetic flux density B M of 1000 G or more, preferably 1200 G or more. When the coercive force Hc is less than 50 Oe, the magnetic hysteresis loss is too small, and when the maximum magnetic flux density B M of the magnetic powder is less than 1000 G, or the residual magnetic flux density Br / coercive force Hc of the magnetic powder is less than 1.3. In this case, the magnetic hysteresis loss becomes small, and sufficient heat generation may not be obtained. Therefore, when the residual magnetic flux density Br / coercive force Hc has a magnetism of 1.3 or more, good results are often obtained.

【００１３】融着時の印加交番磁界は、磁性体が有する
保持力の１〜１５倍程度とされる。印加交番磁界が、磁
性体の保磁力の１倍未満であると、発熱効率が低下し、
また１０倍を越える交番磁界を印加しても、発熱効率に
あまり影響がない。加熱の省エネルギー化及び加熱装置
の規模を考慮すると、２〜１０倍程度、好ましくは５〜
１０倍程度が望ましい。The applied alternating magnetic field during fusion is about 1 to 15 times the coercive force of the magnetic material. When the applied alternating magnetic field is less than 1 time the coercive force of the magnetic substance, the heat generation efficiency decreases,
Moreover, even if an alternating magnetic field exceeding 10 times is applied, the heat generation efficiency is not significantly affected. Considering the energy saving of heating and the scale of the heating device, it is about 2 to 10 times, preferably 5 to
About 10 times is desirable.

【００１４】磁性粉を混入したシート等の代わりに誘導
損失係数の高い樹脂を含有したシート等を用いた場合、
誘導損失係数の高い樹脂としては、融点が１８０℃以上
で、誘導損失係数が０．１以上である樹脂が用いられ、
その混合割合は、３０〜６０重量％とされる。３０重量
％未満では、誘導電流による発熱が不十分であり、６０
重量％を越えると、融着後の強度が弱くなる。また融点
が１８０℃以上の樹脂を用いることにより樹脂の混練が
容易となる。When a sheet containing a resin having a high induction loss coefficient is used instead of the sheet containing magnetic powder,
As the resin having a high induction loss coefficient, a resin having a melting point of 180 ° C. or higher and an induction loss coefficient of 0.1 or higher is used.
The mixing ratio is 30 to 60% by weight. If it is less than 30% by weight, the heat generated by the induced current is insufficient,
If the content exceeds 50% by weight, the strength after fusion becomes weak. Further, the use of a resin having a melting point of 180 ° C. or higher facilitates the kneading of the resin.

【００１５】誘導損失係数が０．１以上である樹脂とし
ては、例えば誘導損失係数が０．１であるナイロン６、
誘導損失係数が０．２であるフェノール樹脂等が例示さ
れる。As the resin having an inductive loss coefficient of 0.1 or more, for example, nylon 6 having an inductive loss coefficient of 0.1,
Examples include phenolic resins having an induction loss coefficient of 0.2.

【００１６】[0016]

【実施例】図１及び図２は、プラスチック管とソケット
継手との接合方法の一例を示すもので、先ず、熱可塑性
樹脂よりなるプラスチック管１の管端部にフェライト粉
を混入した熱可塑性樹脂製テープ２を巻付けたのち（図
１）、ソケット継手３に両側よりテープ２を巻付けたプ
ラスチック管１の管端部を差込む。ついで高周波発生装
置と電極コア及び励磁コイルで構成された加熱装置４を
用い、１〜４００ＫＨｚの交番磁界を発生させ、これに
よりテープ２のフェライト粉を発熱させて融着する。1 and 2 show an example of a method for joining a plastic pipe and a socket joint. First, a thermoplastic resin in which ferrite powder is mixed in the end portion of a plastic pipe 1 made of a thermoplastic resin. After winding the tape 2 (FIG. 1), the pipe ends of the plastic pipe 1 on which the tape 2 is wound are inserted into the socket joint 3 from both sides. Then, an alternating magnetic field of 1 to 400 KHz is generated by using the heating device 4 composed of the high frequency generator, the electrode core and the exciting coil, whereby the ferrite powder of the tape 2 is heated and fused.

【００１７】図３は、プラスチック管６の外周面に側方
よりサドル継手７をフェライト粉を混入した熱可塑製樹
脂製シート８を介して取付け、かつ管端部にテープ２を
巻付けたプラスチック管９を差込んで取付けた例を示す
ものである。In FIG. 3, a saddle joint 7 is attached to the outer peripheral surface of a plastic pipe 6 from the side via a thermoplastic resin sheet 8 mixed with ferrite powder, and a tape 2 is wrapped around the pipe end. It shows an example in which the tube 9 is inserted and attached.

【００１８】[0018]

【発明の効果】本発明のプラスチック管の接合方法によ
れば、自己熱融着性を有しない継手でも、プラスチック
管にテープ等を巻付け、或いはテープ等を介在させて交
番磁界を印加し、或いはマイクロ波を照射することによ
り、自己熱融着性を有する継手を用いたときと同様にし
てプラスチック管と継手との接合を行うことができる。According to the method for joining plastic pipes of the present invention, even in a joint having no self-heat-sealing property, a tape or the like is wound around the plastic pipe, or an alternating magnetic field is applied by interposing the tape or the like, Alternatively, by irradiating with a microwave, it is possible to join the plastic pipe and the joint in the same manner as when the joint having the self-heat fusion property is used.

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

【図１】 テープを巻付けたプラスチック管管端部の斜
視図。FIG. 1 is a perspective view of a pipe end portion of a plastic pipe on which a tape is wound.

【図２】 ソケット継手によるプラスチック管の接合時
を示す断面図。FIG. 2 is a cross-sectional view showing when a plastic pipe is joined by a socket joint.

【図３】 サドル継手による場合の断面図。FIG. 3 is a sectional view when a saddle joint is used.

【符号の説明】[Explanation of symbols]

１、６、９・・・プラスチック管 ２・・・
テープ ３・・・ソケット継手 ４・・・
加熱装置 ７・・・サドル継手 ８・・・
シート1, 6, 9 ... Plastic tube 2 ...
Tape 3 ・ ・ ・ Socket joint 4 ・ ・ ・
Heating device 7 ... Saddle joint 8 ...
Sheet

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 磁性酸化鉄粉、フェライト粉或いはこら
れの混合物よりなる磁性粉を混入した熱可塑性樹脂より
なるシートないしテープを用い、シート等をプラスチッ
ク管管端部に巻付けて継手に差込むか、或いはシート等
をプラスチック管外周面に当てゝからサドル継手を押当
て固定状態にしたのち、高周波発生装置と電極コア及び
励磁コイルで構成された加熱装置を用いて１〜４００Ｋ
Ｈｚの交番磁界を発生させ、磁性粉の発熱によって熱融
着することを特徴とするプラスチック管の接合方法。1. A sheet or tape made of a thermoplastic resin mixed with magnetic powder of magnetic iron oxide powder, ferrite powder, or a mixture thereof is used, and the sheet or the like is wound around the end of the plastic pipe, and the joint is attached to the joint. 1-400K using a heating device consisting of a high frequency generator, an electrode core and an exciting coil after pressing or fixing a saddle joint from the outer surface of the plastic tube
A method for joining plastic pipes, characterized in that an alternating magnetic field of Hz is generated, and heat fusion is caused by heat generation of magnetic powder. 【請求項２】 樹脂の溶融温度範囲内にキュリー点を有
する強磁性体の金属粉を混入した熱可塑性樹脂よりなる
シート等を用い、シート等をプラスチック管管端部に巻
付けて継手に差込むか、或いはシート等をプラスチック
管外周面に当てゝからサドル継手に押当て固定状態にし
たのち、誘導電流発生装置により１０〜５００ＫＨｚの
周波数を有する交番磁界を発生させ、金属粉に渦電流を
生じさせて発熱し熱融着することを特徴とするプラスチ
ック管の接合方法。2. A sheet or the like made of a thermoplastic resin mixed with a ferromagnetic metal powder having a Curie point within the melting temperature range of the resin is used, and the sheet or the like is wound around the end portion of the plastic pipe and is attached to the joint. Insert or press a sheet etc. on the outer peripheral surface of the plastic pipe and press it to the saddle joint to fix it, then generate an alternating magnetic field with a frequency of 10 to 500 KHz by the induced current generator to generate an eddy current in the metal powder. A method for joining plastic pipes, which is characterized in that the plastic pipes are caused to generate heat and thermally fused. 【請求項３】 シートないしテープを誘導損失係数が
０．１以上の樹脂３０〜６０重量％を含有した熱可塑性
樹脂材料より構成し、誘導電流発生装置よりマイクロ波
を照射してシート等を発熱させ、熱融着することを特徴
とする請求項２記載のプラスチック管の接合方法。3. The sheet or tape is made of a thermoplastic resin material containing 30 to 60% by weight of a resin having an inductive loss coefficient of 0.1 or more, and microwaves are emitted from an induction current generator to heat the sheet or the like. The method for joining plastic pipes according to claim 2, wherein the heat treatment is performed by heat fusion.
JP5265232A 1993-10-22 1993-10-22 Plastic tube connecting method Pending JPH07117130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5265232A JPH07117130A (en) 1993-10-22 1993-10-22 Plastic tube connecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5265232A JPH07117130A (en) 1993-10-22 1993-10-22 Plastic tube connecting method

Publications (1)

Publication Number Publication Date
JPH07117130A true JPH07117130A (en) 1995-05-09

Family

ID=17414360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5265232A Pending JPH07117130A (en) 1993-10-22 1993-10-22 Plastic tube connecting method

Country Status (1)

Country Link
JP (1) JPH07117130A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277988A (en) * 1995-04-06 1996-10-22 C I Kasei Co Ltd Joining method for polyethylene resin pipe and joining structure thereof
US6413179B1 (en) 1999-08-30 2002-07-02 Ntn Corporation Autotensioner and belt tension adjuster
US6666784B1 (en) 1999-10-06 2003-12-23 Ntn Corporation Piston rod piston detector, autotensioner and belt tension adjuster
KR20040080029A (en) * 2003-03-10 2004-09-18 미래엔텍 주식회사 a
CN103901098A (en) * 2014-03-22 2014-07-02 国家电网公司 Internal defect processing method for welded joint
LU100865B1 (en) * 2018-07-03 2020-01-07 Aliaxis R&D Sas Coupling element, coupling assembly with such a coupling element and method of coupling a first substrate to such a coupling element
FR3094667A1 (en) * 2019-04-04 2020-10-09 Centre Technique des Industries Mécaniques Method of assembling thermoplastic parts by electromagnetic induction

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277988A (en) * 1995-04-06 1996-10-22 C I Kasei Co Ltd Joining method for polyethylene resin pipe and joining structure thereof
US6413179B1 (en) 1999-08-30 2002-07-02 Ntn Corporation Autotensioner and belt tension adjuster
US6666784B1 (en) 1999-10-06 2003-12-23 Ntn Corporation Piston rod piston detector, autotensioner and belt tension adjuster
US7081059B2 (en) 1999-10-06 2006-07-25 Ntn Corporation Piston rod position detector, autotensioner and belt tension adjuster
KR20040080029A (en) * 2003-03-10 2004-09-18 미래엔텍 주식회사 a
CN103901098A (en) * 2014-03-22 2014-07-02 国家电网公司 Internal defect processing method for welded joint
LU100865B1 (en) * 2018-07-03 2020-01-07 Aliaxis R&D Sas Coupling element, coupling assembly with such a coupling element and method of coupling a first substrate to such a coupling element
WO2020007924A1 (en) * 2018-07-03 2020-01-09 Aliaxis R&D S.A.S Coupling element, coupling assembly with such a coupling element and method of coupling a first substrate to such a coupling element
FR3094667A1 (en) * 2019-04-04 2020-10-09 Centre Technique des Industries Mécaniques Method of assembling thermoplastic parts by electromagnetic induction

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