JP2847686B2 - エレクトロフュージョン継手の融着方法 - Google Patents

エレクトロフュージョン継手の融着方法

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Publication number
JP2847686B2
JP2847686B2 JP21466090A JP21466090A JP2847686B2 JP 2847686 B2 JP2847686 B2 JP 2847686B2 JP 21466090 A JP21466090 A JP 21466090A JP 21466090 A JP21466090 A JP 21466090A JP 2847686 B2 JP2847686 B2 JP 2847686B2
Authority
JP
Japan
Prior art keywords
joint
heating wire
diameter
voltage
electrofusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP21466090A
Other languages
English (en)
Other versions
JPH0497830A (ja
Inventor
文夫 長谷
和憲 水戸
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 Chemicals Inc
Original Assignee
Mitsui Chemicals Inc
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 Chemicals Inc filed Critical Mitsui Chemicals Inc
Priority to JP21466090A priority Critical patent/JP2847686B2/ja
Publication of JPH0497830A publication Critical patent/JPH0497830A/ja
Application granted granted Critical
Publication of JP2847686B2 publication Critical patent/JP2847686B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B29C66/50—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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • 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

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、プラスチック管を連結するのに使用され、
管との接触面に電熱線を埋設したエレクトロフュージョ
ン継手の融着方法に関する。
従来技術 上下水道やガス管などに多用され始めたプラスチック
管の継手として近年開発されたものにエレクトロフュー
ジョン継手がある。
エレクトロフュージョン継手は管との接触面に電熱線
を埋設した成形品よりなるもので、ソケット継手、サド
ル継手、エルボ継手、Ｔ継手、レジューサ継手、キャッ
プ継手など各種の継手が開発されており、管との融着
は、管端部を継手に嵌挿するか、継手を管の側方より外
周面に押当てた状態で決められた時間、一定の電圧で通
電して接触面を加熱溶融することにより行われている。
融着時にエレクトロフュージョン継手に付与される適
正なインプットエネルギーは、継手の種類や口径によっ
て異なり、そのコントロールは出力電圧が一定であるか
ら電熱線の抵抗値によって行われている。そこで従来、
エレクトロフュージョン継手の設計時には、継手の種類
や口径に応じて適正な出力エネルギーが得られるような
抵抗値の電熱線を選び、コイルのピッチや融着時間を変
えることによって調整していた。
第１図に示すソケット継手と第２図に示すキャップ継
手についていえば、これらの融着部は口径が同じ場合、
全く同一の条件で融着することが好ましい。同一条件の
融着とは、電熱線からの放熱を考慮すると、線の外径、
巻ピッチが同一であることが必要であり、上述のキャッ
プ継手は、ソケットの1/2のエネルギーで融着しなけれ
ばならない。従って定電圧の場合、キャップ継手はソケ
ット継手に比較して電熱線が1/2の長さで２倍の抵抗を
必要とすることから、線の固有抵抗は４倍であることが
要求されるが、ぴったりと一致するような電熱線を探す
のは困難であり、通常は線径の若干の変更を含め、４倍
に近い電熱線を選択してからコイルのピッチ、巻数や時
間を変更して調整していた。
発明が解決しようとする課題 従来法では上述するように、継手の種類や口径に応じ
て必要な抵抗値の電熱線を選択し、なければピッチを変
えて電熱線の密度を変更したり、融着時間を変えて調整
していたが、必要な出力エネルギーが得られるように設
計するのは困難であり、そのうえ電熱線の密度、例えば
コイルピッチを変え、電熱線の抵抗値を変えると、出力
エネルギーが電熱線の総抵抗に反比例し、必要なエネル
ギー密度が得られなくなる。
また融着時間を変えるのも加熱不足や過加熱を来たし
がちとなり好ましくない。
本発明は、必要な出力エネルギーを得るためのエレク
トロフュージョン継手の設計が容易に行えるようにする
ことを目的としてなされたものである。
課題の解決手段 本発明は、継手の種類や口径の如何にかゝわらずエネ
ルギー密度が一定となるように電圧を付与することによ
って上記の目的を達成しようとするものである。
すなわち本発明は、プラスチック管を連結するのに使
用され、管との接触面に電熱線を埋設したエレクトロフ
ュージョン継手の融着方法において、継手の種類や口径
の如何にかゝわらずエネルギー密度が一定となるように
電圧を付与することを特徴とするものである。
作用 エネルギー密度が一定となるように電圧を付与するこ
とにより、どのような種類や口径の継手に対しても必要
なエネルギー密度が与えられる。
実施例 第１図に示すソケット継手と第２図に示すキャップ継
手を同線材の電熱線を使用し、同一ピッチで設計した場
合、キャップ継手の電熱線の総抵抗は1/2となるが、電
圧を1/2にすることによりソケット継手の1/2の総エネル
ギーを生じることが可能となる。したがって、第１図に
示すようなソケット継手において、融着面積が1.5倍の
サイスのもので、同線材の電熱線を使用し、同ピッチで
設計すると、電熱線の総抵抗は1.5倍となり、与える電
圧は1.5倍となる。
発明の効果 本発明は以上のように、継手の種類や口径の如何にか
ゝわらず、エネルギー密度が一定となるように電圧を付
与するようにしたもので、電熱線の抵抗値の如何にかゝ
わらず、常に適正なエネルギー密度を与えて最適な融着
を行うことができる。
【図面の簡単な説明】
第１図はソケット継手、第２図はキャップ継手の正面図
をそれぞれ示す。
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−160820（ＪＰ，Ａ) 特開 昭63−160822（ＪＰ，Ａ) 特開 平１−172692（ＪＰ，Ａ) 実開 平１−67022（ＪＰ，Ｕ)

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】プラスチック管を連結するのに使用され、
    管との接触面に電熱線を埋設したエレクトロフュージョ
    ン継手の融着方法において、継手の種類や口径の如何に
    かゝわらずエネルギー密度が一定となるように電圧を付
    与することを特徴とするエレクトロフュージョン継手の
    融着方法。
JP21466090A 1990-08-13 1990-08-13 エレクトロフュージョン継手の融着方法 Expired - Lifetime JP2847686B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21466090A JP2847686B2 (ja) 1990-08-13 1990-08-13 エレクトロフュージョン継手の融着方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21466090A JP2847686B2 (ja) 1990-08-13 1990-08-13 エレクトロフュージョン継手の融着方法

Publications (2)

Publication Number Publication Date
JPH0497830A JPH0497830A (ja) 1992-03-30
JP2847686B2 true JP2847686B2 (ja) 1999-01-20

Family

ID=16659452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21466090A Expired - Lifetime JP2847686B2 (ja) 1990-08-13 1990-08-13 エレクトロフュージョン継手の融着方法

Country Status (1)

Country Link
JP (1) JP2847686B2 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2516301B (en) 2013-07-18 2016-06-08 Pioneer Lining Tech Ltd Improved electrofusion fitting methods

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63160820A (ja) * 1986-12-24 1988-07-04 Sekisui Chem Co Ltd 電気溶着装置
JPH0745185B2 (ja) * 1986-12-24 1995-05-17 積水化学工業株式会社 電気溶着装置
JPH0536669Y2 (ja) * 1987-10-22 1993-09-16
JPH01172692A (ja) * 1987-12-25 1989-07-07 Mitsui Petrochem Ind Ltd エレクトロフュージョン継手の接合方法

Also Published As

Publication number Publication date
JPH0497830A (ja) 1992-03-30

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