JPH11218286A - 電気溶着継手 - Google Patents

電気溶着継手

Info

Publication number
JPH11218286A
JPH11218286A JP10143099A JP14309998A JPH11218286A JP H11218286 A JPH11218286 A JP H11218286A JP 10143099 A JP10143099 A JP 10143099A JP 14309998 A JP14309998 A JP 14309998A JP H11218286 A JPH11218286 A JP H11218286A
Authority
JP
Japan
Prior art keywords
joint
heating element
carbon black
pipes
conductive sheet
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
JP10143099A
Other languages
English (en)
Inventor
Takeshi Tokumaru
武司 徳丸
Kenichiro Kojima
賢一郎 小島
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP10143099A priority Critical patent/JPH11218286A/ja
Publication of JPH11218286A publication Critical patent/JPH11218286A/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
    • 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
    • B29C65/3444—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 being a ribbon, band or strip
    • 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
    • B29C65/344—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 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"
    • B29C65/3404—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
    • B29C65/3444—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 being a ribbon, band or strip
    • B29C65/3448—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 being a ribbon, band or strip said ribbon, band or strip being perforated
    • 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
    • B29C65/3444—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 being a ribbon, band or strip
    • B29C65/3452—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 being a ribbon, band or strip forming a sleeve, e.g. a wrap-around sleeve
    • 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
    • B29C66/11—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
    • B29C66/13—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
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • 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
    • B29C65/3408—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 single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3412—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 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"
    • B29C65/3468—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 means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of 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
    • 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"
    • B29C65/3472—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
    • B29C65/3484—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 non-metallic
    • B29C65/3492—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 non-metallic being carbon
    • 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
    • B29C65/3484—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 non-metallic
    • B29C65/3496—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 non-metallic with a coating, e.g. a metallic or a carbon coating

Landscapes

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

Abstract

(57)【要約】 【課題】 成形サイクルを短縮して生産性を向上でき、
然も、確実に接続を行なえる信頼性のある電気溶着継手
を提供すること。 【解決手段】 ポリエチレン製継手本体１の内周面に、
カーボンブラックが均一に混入・分散されているポリエ
チレン製のシート状発熱体２が一体に配設されている電
気溶着継手Ｓ。

Description

【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、電気溶着継手に関
する。
【０００２】
【従来の技術】近時、ガス管或いは上下水道管として使
用されているポリエチレン（ＰＥ）管を接続する管継手
として、ＰＥ製の電気溶着継手が知られている。この溶
着継手は、円筒状の継手本体の内周面にニクロム線など
の電熱抵抗線をらせん状に埋設し、この抵抗線の両端に
電気的に接続した端子ピンに電源を接続して通電するこ
とにより、ＰＥ管の外周面と溶着継手の内周面とを気密
性よく接続するものである（例えば特開昭58-131025 号
公報を参照）。
【０００３】この溶着継手を製造するには、例えば特開
昭63-71322号公報に記載されているように、継手本体の
内周面を形成するための形成面を有するコアの外周面
に、ＰＥ樹脂にて表面が被覆されたニクロム線をらせん
状に巻き付ける巻線工程と、このニクロム線の両端部の
被覆樹脂層を皮剥きし、この皮剥きしたニクロム線を端
子ピンの下部穴に挿入して、治具にてかしめて接続する
端子ピンかしめ工程と、次に、これを固定外型内にセッ
トして溶融したＰＥ樹脂を射出成形する成形工程とから
なる製造方法が一般的に採用されている。
【０００４】
【発明が解決しようとする課題】然しながら、上記電熱
抵抗線方式の溶着継手においては、ニクロム線をコアの
外周面に一定の引張り張力をかけた状態で、一定のピッ
チで巻き付けなければならず、この巻線工程においてか
なり時間を要し、生産性を向上することができなかっ
た。また、ニクロム線の太さによっては、ニクロム線が
巻線工程の際に断線したり、或いは電気溶着継手として
使用しているときに、断線してＰＥ管の接続が不良とな
るといった問題もあった。
【０００５】本発明の課題は、成形サイクルを短縮して
生産性を向上でき、然も、確実に接続を行える信頼性の
ある電気溶着継手を提供することにある。
【０００６】
【課題を解決するための手段】請求項１記載の本発明
は、継手本体の表面近傍に発熱体が配設されている電気
溶着継手において、前記発熱体を導電性シート状のもの
としたものである。
【０００７】請求項２記載の本発明は、発熱体である導
電性シートを、カーボンブラックが均一に混入・分散さ
れた熱可塑性樹脂製のものとしたものである。
【０００８】本発明における継手本体の形態はソケッ
ト、エルボ、チーズ、Ｙ、キャップなどのほか、サドル
や分岐サドルなどのタイプでもよい。
【０００９】導電性シート状の発熱体としては、導電性
不織布のほか、ポリエチレンやポリプロピレンなどの熱
可塑性樹脂シート中に金属粉やカーボンブラックなどが
均一に分散された樹脂製シートを使用できる。例えば、
導電性不織布の場合であれば、導電性繊維を含有する抄
造シートが好ましく、導電性繊維単独または導電性繊維
と非導電性繊維の混合物を水などの媒体中に分散させ、
適宜のバインダーとともに抄き上げて繊維を接着固定
し、不織布化することにより得られる。
【００１０】また、導電性繊維としては、その電気抵抗
が０．０１Ωｃｍ以下の導電性を有するものが好まし
く、例えば炭素繊維が使用される。導電性繊維の太さは
５０μ以下、好ましくは３０μ以下が望ましい。そし
て、抄造シートの目付量としては２０〜３００ｇ／ｍ2
が好ましい。
【００１１】
【作用】請求項１〜４記載の本発明の電気溶着継手にお
いては、発熱体が導電性シート状のものであるので、巻
線工程が短縮化されて製造効率が向上し、欠陥部のない
信頼性のある接続を行うことができる。
【００１２】請求項２記載の本発明の電気溶着継手にお
いては、発熱体がカーボンブラックを均一に分散した熱
可塑性樹脂製シートであるので、より簡単に製造でき
る。
【００１３】請求項３に記載の本発明の電気溶着継手に
おいては、継手本体に配設される発熱体が２分割される
から、継手本体の両端部の受口のそれぞれに挿入される
被接合管の管端部回りに発熱体の存在しないコールドゾ
ーンを確保でき、発熱体の発熱による溶融樹脂をそのコ
ールドゾーンで密封して面圧を確保し、継手本体と被接
合管とを良好に溶融接続できる。
【００１４】請求項４に記載の本発明の電気溶着継手に
おいては、継手本体に配設される発熱体に多数の透孔を
設けたから、発熱体の発熱により溶融する継手本体側樹
脂と被接合管側樹脂とをその透孔を介してつなぐ如くに
強固に融着し、継手本体と被接合管の融着界面での剪断
強度を向上できる。
【００１５】
【発明の実施の形態】（第１実施形態）（図１〜図３） 以下、本発明の電気溶着継手の実施の形態を図面を参照
して説明する。図１は本発明の第１実施形態を一部切欠
いて示す正面図、図２は図１の要部を示す斜視図、図３
は図２の分解斜視図である。
【００１６】図において、Ｓはソケットタイプの電気溶
着継手であり、ＰＥ樹脂製の継手本体１と、この継手本
体１の両端部を除いた内周面に一体に配設された導電性
シート状の発熱体２とからなっている。発熱体２はカー
ボンブラックが均一に混入・分散されたＰＥ樹脂製のも
のであり、図２に示すように、その両端外周面にリング
状の電極板３、３が装着され、この両電極板３の一部に
通電用の端子ピン３１、３１が接続されている。尚、両
端子ピン３１の周りにはボス１１、１１が立設されてい
る。
【００１７】次に、電気溶着継手Ｓの使用状態について
説明する。図１において、二点鎖線で示すように、電気
溶着継手Ｓの両端部の受け口内にＰＥ管４、４を挿入
し、端子ピン３１、３１に接続した電源コードを通じて
通電することにより、発熱体２中のカーボンブラックが
発熱して、その周りのＰＥ樹脂および両ＰＥ管４の外表
面層が溶融状態となって、電気溶着継手Ｓと両ＰＥ管４
とが溶融接続される。この場合、通電により、導電性シ
ート状の発熱体２が全面にわたって均一に発熱するの
で、隙間などの欠陥部のない気密性にすぐれた接続部を
得ることができる。
【００１８】上記電気溶着継手Ｓを製造するには、従来
と同様にして行えばよい。継手本体１の内周面を形成す
るコア（図示せず）の外周面に、導電性シート状の発熱
体２を巻き付け、その重ね合わせ部を鏝当てして仮止め
する。そして、図３に示すように、円筒状に巻き付けた
発熱体２の両端外周面にリング状の電極板３、３を装着
し、この両電極板３の一部に通電用の端子ピン３１、３
１を固着して取り付ける。次に、このようにして得られ
た成形コア（図２を参照）を外型（図示せず）内にセッ
トして溶融ＰＥ樹脂を射出成形し、冷却して脱型するこ
とにより、電気溶着継手Ｓが得られる。
【００１９】（第２実施形態）（図４〜図６） 図４は本発明の第２実施形態を示す縦断面図、図５は図
４の要部を示す斜視図、図６は図５の分解斜視図であ
る。
【００２０】図において、ＳＡはサドルタイプの電気溶
着継手であり、サドル部１２Ａの中央に分岐部１３Ａが
立設されたＰＥ樹脂製の継手本体１Ａと、この継手本体
１Ａのサドル部１２Ａの内面に一体に配設された導電性
シート状の発熱体２Ａとからなっている。発熱体２Ａは
上記第１実施例と同様のカーボンブラックが均一に混入
・分散されたＰＥ樹脂製のものであり、図５および図６
に示すように、その両端外周面に円弧状の電極板３Ａ、
３Ａが装着され、この両電極板３Ａの一部に通電用の端
子ピン３１Ａ、３１Ａが接続されている。尚、両端子ピ
ン３１Ａの周りにはボス１１Ａ、１１Ａが立設されてい
る。尚、電気溶着継手ＳＡを製造するには、従来と同様
にして行えばよい。
【００２１】次に、電気溶着継手ＳＡの使用状態につい
て説明する。図４に示すように、ＰＥ管４Ａの外面に、
電気溶着継手ＳＡのサドル部１２Ａを所定の固定治具を
用いて固定する。そして、端子ピン３１Ａ、３１Ａに接
続した電源コードを通じて通電することにより、発熱体
２Ａ中のカーボンブラックが発熱して、その周りのＰＥ
樹脂およびＰＥ管４Ａの外表面層が溶融状態となって、
ＰＥ管４Ａの上部外面に電気溶着継手ＳＡが溶融接続さ
れる。この場合、通電により、導電性シート状の発熱体
２Ａが全面にわたって均一に発熱するので、隙間などの
欠陥部のない気密性にすぐれた接続部を得ることができ
る。
【００２２】（第３実施形態）（図７） 図７は、本発明の第３実施形態を示す模式図である。
【００２３】第３実施形態が第１実施形態と異なる点
は、図７に示す如く、発熱体２を継手本体１の長手方向
に２分割し、両分割発熱体４０Ａ、４０Ｂをリング状の
導電体４１により接続したことにある。導電体４１は、
通電時の発熱量が分割発熱体４０Ａ、４０Ｂより相当に
小さい。
【００２４】この第３実施形態にあっては、継手本体１
に配設される発熱体４０Ａ、４０Ｂが２分割されるか
ら、継手本体１の両端部の受口のそれぞれに挿入される
ＰＥ管４の管端部回りに発熱体４０Ａ、４０Ｂの存在し
ないコールドゾーンを確保でき、発熱体４０Ａ、４０Ｂ
の発熱による溶融樹脂をそのコールドゾーンで密封して
面圧を確保し、継手本体１と両ＰＥ管４とを良好に溶融
接続できる。
【００２５】（第４実施形態）（図８、図９） 図８は本発明の第４実施形態を示す模式図である。
【００２６】第４実施形態が第３実施形態と異なる点
は、図８に示す如く、発熱体４０Ａ、４０Ｂに多数の透
孔４２を設けたことにある。この発熱体４０Ａ、４０Ｂ
に設ける透孔４２のパターンは、図９（Ａ）〜（Ｄ）に
示す如くに多様化できる。
【００２７】この第４実施形態にあっては、継手本体１
に配設される発熱体４０Ａ、４０Ｂに多数の透孔４２を
設けたから、発熱体４０Ａ、４０Ｂの発熱により溶融す
る継手本体側樹脂と被接合管側樹脂とをその透孔４２を
介してつなぐ如くに強固に融着し、継手本体１１と両Ｐ
Ｅ管４の融着界面での剪断強度を向上できる。
【００２８】
【発明の効果】請求項１記載の本発明の電気溶着継手に
おいては、その製造効率が向上し、かつ信頼性のある接
続部を得ることができる。
【００２９】請求項２記載の本発明の電気溶着継手にお
いては、カーボンブラックを均一に混入・分散した熱可
塑性樹脂製シートを発熱体としているので、より簡単に
製造できる。
【００３０】請求項３記載の本発明の電気溶着継手にお
いては、発熱体を継手本体の長手方向に２分割したの
で、被接合管の管端部回りにコールドゾーンを確保し、
継手本体と被接合管とを良好に溶融接続できる。
【００３１】請求項４記載の本発明の電気溶着継手にお
いては、発熱体に透孔を設けたので、継手本体側の溶融
樹脂と被接合管側の溶融樹脂とをその透孔を介して強固
に融着し、継手本体と被接合管の融着界面での剪断強度
を向上できる。
【図面の簡単な説明】
【図１】本発明の第１実施形態を一部切欠いて示す正面
図である。
【図２】図１の要部を示す斜視図である。
【図３】図２の分解斜視図である。
【図４】本発明の第２実施形態を示す縦断面図である。
【図５】図４の要部を示す斜視図である。
【図６】図５の分解斜視図である。
【図７】図７は本発明の第２実施形態を示す模式図であ
る。
【図８】図８は本発明の第３実施形態を示す模式図であ
る。
【図９】図９は透孔が付された発熱体の表面形態を示す
模式図である。
【符号の説明】
１、１Ａ 継手本体 １２Ａ サドル部 １３Ａ 分岐部 ２、２Ａ シート状の発熱体 ３、３Ａ 電極板 ３１、３１Ａ 端子ピン ４０Ａ、４０Ｂ 分割発熱体 ４１ 導電体 ４２ 透孔

Claims (4)

    【特許請求の範囲】
  1. 【請求項１】 継手本体の表面近傍に発熱体が配設され
    ている電気溶着継手において、前記発熱体が導電性シー
    ト状のものであることを特徴とする電気溶着継手。
  2. 【請求項２】 導電性シートが、カーボンブラックが均
    一に混入・分散された熱可塑性樹脂製のものである請求
    項１記載の電気溶着継手。
  3. 【請求項３】 前記発熱体が継手本体の長手方向に２分
    割され、両分割発熱体を導電体により接続してなる請求
    項１又は２記載の電気溶着継手。
  4. 【請求項４】 前記発熱体が多数の透孔を付されてなる
    請求項１〜３のいずれかに記載の電気溶着継手。
JP10143099A 1997-11-26 1998-05-25 電気溶着継手 Pending JPH11218286A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10143099A JPH11218286A (ja) 1997-11-26 1998-05-25 電気溶着継手

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP32484797 1997-11-26
JP9-324847 1997-11-26
JP10143099A JPH11218286A (ja) 1997-11-26 1998-05-25 電気溶着継手

Publications (1)

Publication Number Publication Date
JPH11218286A true JPH11218286A (ja) 1999-08-10

Family

ID=26474903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10143099A Pending JPH11218286A (ja) 1997-11-26 1998-05-25 電気溶着継手

Country Status (1)

Country Link
JP (1) JPH11218286A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019971A (ja) * 2006-07-12 2008-01-31 Sekisui Chem Co Ltd 配管接続構造及びカバー部材
JP2009270684A (ja) * 2008-05-09 2009-11-19 Osaka Gas Co Ltd エレクトロフュージョン継手

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019971A (ja) * 2006-07-12 2008-01-31 Sekisui Chem Co Ltd 配管接続構造及びカバー部材
JP2009270684A (ja) * 2008-05-09 2009-11-19 Osaka Gas Co Ltd エレクトロフュージョン継手

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