JPH06278211A - ワークコイルおよび誘導融着システム - Google Patents

ワークコイルおよび誘導融着システム

Info

Publication number
JPH06278211A
JPH06278211A JP5069712A JP6971293A JPH06278211A JP H06278211 A JPH06278211 A JP H06278211A JP 5069712 A JP5069712 A JP 5069712A JP 6971293 A JP6971293 A JP 6971293A JP H06278211 A JPH06278211 A JP H06278211A
Authority
JP
Japan
Prior art keywords
joint
work coil
heater
magnetic alloy
conductor
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
JP5069712A
Other languages
English (en)
Inventor
Hideki Bai
秀樹 倍
Taku Tago
卓 多胡
Shigeyoshi Nagamatsu
茂儀 永松
Kozo Nishikawa
幸三 西川
Masayuki Kanda
雅之 神田
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP5069712A priority Critical patent/JPH06278211A/ja
Publication of JPH06278211A publication Critical patent/JPH06278211A/ja
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
    • B29C66/50—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
    • B29C65/3604—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
    • B29C65/3604—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
    • B29C65/364—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 being a woven or non-woven fabric or being a mesh
    • 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
    • B29C65/3668—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 means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • 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
    • 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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/12—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
    • B29C66/1222—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 lapped 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
    • B29C66/1224—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
    • B29C66/50—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
    • B29C66/5229—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts 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
    • 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
    • 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

Abstract

(57)【要約】 【構成】 第１径の継手１２に設けられたヒータ２２の
効率と第２径の継手に設けられたヒータの効率との比
が、それぞれのヒータの必要エネルギの比と等しくなる
ように導電体２８の径Ｌを設定する。 【効果】 出力および通電時間を変更することなく、ワ
ークコイル１０を口径の異なる２種類の継手に適用でき
る。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明はワークコイルおよび誘
導融着システムに関し、特にたとえば高周波誘導加熱に
よるプラスチックパイプ等の融着に用いられる、ワーク
コイルおよび誘導融着システムに関する。
【０００２】
【従来の技術】ワークコイルを用いた電気融着継手の接
合方法の一例が特願平２−３３９０４８号に開示されて
いる。この種の接合方法では、継手の品種に応じた最適
な高周波エネルギを継手に供給することが必要であり、
そのために、ワークコイルの出力や通電時間を継手の品
種毎に調整する必要があった。
【０００３】
【発明が解決しようとする課題】従来では、継手の品種
毎にワークコイルの出力や通電時間を調整する必要があ
るため、施工性が悪いという問題点があった。それゆえ
に、この発明の主たる目的は、施工性を向上できる、ワ
ークコイルおよび誘導融着システムを提供することであ
る。
【０００４】
【課題を解決するための手段】第１の発明は、各々が磁
性合金ヒータを有する２種類の口径の継手に使用される
かつ磁性合金ヒータに高周波エネルギを付与する導電体
を含むワークコイルであって、２種類の口径の継手の各
々に設けられた磁性合金ヒータの効率の比が必要エネル
ギの比と等しくなる位置に導電体を配置した、ワークコ
イルである。
【０００５】第２の発明は、導電体を含むワークコイ
ル、ワークコイルから伝達される高周波エネルギに応じ
て発熱する第１の磁性合金ヒータを有する第１径の継
手、およびワークコイルから伝達される高周波エネルギ
に応じて発熱する第２の磁性合金ヒータを有する第２径
の継手を備え、第２の磁性合金ヒータの効率を第１の磁
性合金ヒータの第１の効率に応じて決まる第２の効率に
設定し、ワークコイルによって第１径の継手および第２
径の継手のいずれに対しても同じ高周波エネルギを同じ
時間付与するようにした、誘導融着システムである。
【０００６】
【作用】第１の発明では、たとえば異径の２つの継手の
各々に設けられた磁性合金ヒータの効率の比が必要エネ
ルギの比と等しくなる位置に導電体を配置する。したが
って、ワークコイルを一方の継手に適用するときに必要
な出力値が決まれば、その値を変更することなく他方の
継手にもそのまま適用できる。
【０００７】第２の発明では、第２ヒータの効率を第１
ヒータの第１の効率に応じて決まる第２の効率に設定す
る。すなわち、ワークコイルの出力および通電時間を同
じにした場合でも、第１ヒータおよび第２ヒータがとも
に必要エネルギを得ることができるように第１ヒータの
第１の効率に対する第２ヒータの第２の効率を設定す
る。
【０００８】
【発明の効果】この発明によれば、出力および通電時間
を変更することなく、ワークコイルを口径の異なる２種
類の継手または受口に適用できるので、施工性を大幅に
向上できる。この発明の上述の目的，その他の目的，特
徴および利点は、図面を参照して行う以下の実施例の詳
細な説明から一層明らかとなろう。
【０００９】
【実施例】図１および図２を参照して、この実施例のワ
ークコイル１０は、継手１２（図１）または継手１４
（図２）を用いたパイプの融着接合に用いられるもので
ある。継手１２は、たとえばポリエチレン等の合成樹脂
からなる略中空円筒状の本体１６を含む。本体１６の中
空部は、接合すべきパイプ１８を受け入れる受口２０と
なり、受口２０の内表面近傍には所定のキュリー温度を
有する磁性合金からなる網目状のヒータ２２が設けられ
る。ヒータ（磁性合金）２２のキュリー温度は、その構
成成分の配合割合を変化させることによって調整でき、
接合時の最適融着温度またはその近傍に設定される。
【００１０】継手１４は、継手１２よりも小さく形成さ
れるが、その構成は継手１２とほぼ同じなので、その詳
細な説明は省略する。ワークコイル１０は、たとえばポ
リカーボネート等の耐熱性合成樹脂からなる略中空円筒
状の本体２６を含む。本体２６の内部には、たとえば螺
旋状に巻回された導電体２８が埋め込まれ、導電体２８
の両端は、高周波電源３０に接続される。導電体２８の
位置すなわち径Ｌは、出力および通電時間を変更するこ
となくワークコイル１０を継手１２および１４の両方に
適用できるように、所定の一定値に設定される。
【００１１】すなわち、ヒータ２２の効率は主として導
電体２８とヒータ２２との距離Ｌ1（図１）によって決
まり、ヒータ２２′の効率は主として導電体２８とヒー
タ２２′との距離Ｌ2 （図２）によって決まるので、効
率の比Ａ：ａは主として導電体２８の径Ｌによって決ま
ることになる。したがって、ヒータ２２の必要エネルギ
とヒータ２２′の必要エネルギとの比がＢ：ｂであるな
らば、Ａ：ａ＝Ｂ：ｂとなるようにＬの値が設定され
る。たとえばヒータ２２の必要エネルギが７５０Ｗでヒ
ータ２２′の必要エネルギが６３０Ｗであれば、効率の
比Ａ：ａが７５：６３となるように導電体２８の径Ｌが
設定され、そのときのヒータ２２の効率が７５％であれ
ば、ワークコイル１０の出力が１０００Ｗに設定され
る。
【００１２】接合時には、継手１２の受口２０にパイプ
１８を挿入し、継手１２の周囲にワークコイル１０をセ
ットする。そして、ワークコイル１０のスイッチをオン
してヒータ２２に高周波電流を付与すると、ヒータ２２
は、表皮効果によって電流が集中する表皮部分で急激に
発熱する。ヒータ２２の温度が上昇してキュリー温度に
達すると、その透磁率が大幅に低下して表皮電流はほと
んど流れなくなり、ヒータ２２の発熱が止まる。熱放射
等によってヒータ２２の温度が低下すると、ヒータ２２
は再び表皮電流によって発熱する。このようにして、ヒ
ータ２２は所定のキュリー温度に保たれるので、接合面
は、所定のキュリー温度またはその近傍すなわち最適融
着温度に加熱され、融着される。継手１４を用いてパイ
プ２４を接合する場合も同様にして融着され得る。
【００１３】この実施例によれば、出力および通電時間
を変更することなく、ワークコイルを口径の異なる２種
類の継手に適用できるので、施工性を向上できる。上述
の実施例は、既製の継手１２および１４に適用できるよ
うに導電体２８の径Ｌを所定の一定値に設定するように
したものであるが、導電体２８の径Ｌが予め決まってい
る場合でも、継手１２に設けられたヒータ２２の効率ま
たは継手１４に設けられたヒータ２２′の効率のいずれ
かを調整することによって、同一条件での融着が可能に
なる。たとえば継手１２に設けられたヒータ２２の効率
がＥｃで、ヒータ２２の必要エネルギがＡ（Ｗ）であれ
ば、ワークコイル１０の出力はＡ／Ｅｃ（Ｗ）必要とな
る。したがって、ヒータ２２′の必要エネルギαＡ
（Ｗ）に対して、ヒータ２２′の効率をαＥｃに設定す
れば、出力Ａ／Ｅｃ（Ｗ）および通電時間を変更するこ
となく、ワークコイル１０を継手１２および１４の両方
に適用できる。ヒータ２２′の効率は、たとえば線径や
長さを変えること等によって調整され得る。なお、この
実施例とは逆に、ヒータ２２′の効率を基準としてヒー
タ２２の効率を調整するようにしてもよい。
【００１４】この誘導融着システムにおいても、出力お
よび通電時間を変更することなく、ワークコイルを口径
の異なる２種類の継手に適用できるので、施工性を向上
できる。なお、上述のそれぞれの実施例では、ワークコ
イル１０を口径の異なる２種類の継手１２および１４に
適用した場合を示したが、ワークコイル１０は、たとえ
ば図３に示すように、継手（レデューサ）３２の口径の
異なる２種類の受口３４および３６にも適用できる。こ
の場合にも上述の実施例と同様に、各受口３４および３
６に設けられたヒータ３８および４０の効率の比が必要
エネルギの比と等しくなるように、導電体２８の径Ｌま
たは一方のヒータ３８（４０）の効率に対する他方のヒ
ータ４０（３８）の効率が設定される。
【００１５】この実施例によれば、ワークコイル１０を
口径の異なる２つの受口３４および３６に同時に適用で
きるので、施工性を向上できる。
【図面の簡単な説明】
【図１】この発明の一実施例を示す図解図である。
【図２】この発明の一実施例を示す図解図である。
【図３】この発明の他の実施例を示す図解図である。
【符号の説明】
１０ …ワークコイル １２，１４，３２ …継手 ２２，２２′，３８，４０ …ヒータ ２８ …導電体 ３０ …高周波電源
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西川 幸三 兵庫県尼崎市浜一丁目１番１号 株式会社 クボタ技術開発研究所内 (72)発明者 神田 雅之 兵庫県尼崎市浜一丁目１番１号 株式会社 クボタ技術開発研究所内

Claims (2)

    【特許請求の範囲】
  1. 【請求項１】各々が磁性合金ヒータを有する２種類の口
    径の継手に使用されるかつ前記磁性合金ヒータに高周波
    エネルギを付与する導電体を含むワークコイルであっ
    て、 前記２種類の口径の継手の各々に設けられた前記磁性合
    金ヒータの効率の比が必要エネルギの比と等しくなる位
    置に前記導電体を配置した、ワークコイル。
  2. 【請求項２】導電体を含むワークコイル、 前記ワークコイルから伝達される高周波エネルギに応じ
    て発熱する第１の磁性合金ヒータを有する第１径の継
    手、および前記ワークコイルから伝達される高周波エネ
    ルギに応じて発熱する第２の磁性合金ヒータを有する第
    ２径の継手を備え、 前記第２の磁性合金ヒータの効率を前記第１の磁性合金
    ヒータの第１の効率に応じて決まる第２の効率に設定
    し、前記ワークコイルによって前記第１径の継手および
    前記第２径の継手のいずれに対しても同じ高周波エネル
    ギを同じ時間付与するようにした、誘導融着システム。
JP5069712A 1993-03-29 1993-03-29 ワークコイルおよび誘導融着システム Pending JPH06278211A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5069712A JPH06278211A (ja) 1993-03-29 1993-03-29 ワークコイルおよび誘導融着システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5069712A JPH06278211A (ja) 1993-03-29 1993-03-29 ワークコイルおよび誘導融着システム

Publications (1)

Publication Number Publication Date
JPH06278211A true JPH06278211A (ja) 1994-10-04

Family

ID=13410728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5069712A Pending JPH06278211A (ja) 1993-03-29 1993-03-29 ワークコイルおよび誘導融着システム

Country Status (1)

Country Link
JP (1) JPH06278211A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016145470A3 (de) * 2015-03-18 2016-11-03 "Agru" Kunststofftechnik Gesellschaft M.B.H. Induktionsverbindungsmuffe
US9528638B2 (en) 2011-04-07 2016-12-27 Huliot A.C.S. Ltd. Electromagnetic induction welding of plastic pipe distribution systems
US10710312B2 (en) 2017-03-13 2020-07-14 Huliot Agricultural Cooperative Society Ltd Induction weldable pipe connector having thermally insulated induction weldable socket mouth rims
US10828840B2 (en) 2014-03-04 2020-11-10 Huliot A.C.S. Ltd Electromagnetic induction welding of fluid distribution systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9528638B2 (en) 2011-04-07 2016-12-27 Huliot A.C.S. Ltd. Electromagnetic induction welding of plastic pipe distribution systems
US10828840B2 (en) 2014-03-04 2020-11-10 Huliot A.C.S. Ltd Electromagnetic induction welding of fluid distribution systems
WO2016145470A3 (de) * 2015-03-18 2016-11-03 "Agru" Kunststofftechnik Gesellschaft M.B.H. Induktionsverbindungsmuffe
EP3271138B1 (de) * 2015-03-18 2020-12-09 agru Kunststofftechnik Gesellschaft m.b.H. Induktionsverbindungsmuffe
EP3800034A1 (de) * 2015-03-18 2021-04-07 agru Kunststofftechnik Gesellschaft m.b.H. Induktionsverbindungsmuffe
US10710312B2 (en) 2017-03-13 2020-07-14 Huliot Agricultural Cooperative Society Ltd Induction weldable pipe connector having thermally insulated induction weldable socket mouth rims

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