JPH05164287A - 電気融着式プラスチック管継手 - Google Patents

電気融着式プラスチック管継手

Info

Publication number
JPH05164287A
JPH05164287A JP3327270A JP32727091A JPH05164287A JP H05164287 A JPH05164287 A JP H05164287A JP 3327270 A JP3327270 A JP 3327270A JP 32727091 A JP32727091 A JP 32727091A JP H05164287 A JPH05164287 A JP H05164287A
Authority
JP
Japan
Prior art keywords
connecting members
heating wire
tube fitting
fusion
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3327270A
Other languages
English (en)
Other versions
JP2939032B2 (ja
Inventor
Takashi Anamizu
孝 穴水
Mitsusachi Inagaki
光幸 稲垣
Takeshi Kato
健 加藤
Nobuhiro Nishikata
伸広 西方
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.)
Tokyo Gas Co Ltd
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Tokyo Gas 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 Hitachi Metals Ltd, Tokyo Gas Co Ltd filed Critical Hitachi Metals Ltd
Priority to JP3327270A priority Critical patent/JP2939032B2/ja
Publication of JPH05164287A publication Critical patent/JPH05164287A/ja
Application granted granted Critical
Publication of JP2939032B2 publication Critical patent/JP2939032B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14598—Coating tubular articles
    • B29C45/14614—Joining tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B29C65/3432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/006—Elbows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/243—Elbows

Landscapes

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

Abstract

(57)【要約】 【目的】本発明は、継手本体の口径が大きい管継手であ
っても大きな射出成型機を必要とせずに成形が可能で、
また接続に当たって容量の大きなコントローラを用いな
くとも融着接続でき、更に接続口径に応じた適正な電力
で融着接続できるプラスチック管継手を提供するもので
ある。 【構成】接続プラスチック管を内挿する筒状の内周側に
電熱線を埋設し該電熱線の両端は外面に突出するコネク
ターピンに連結した熱可塑性プラスチック材料よりなる
接続部材を複数個設け、金型内に前記接続部材を管継手
の端部になるように装着し、該装着した接続部材と接続
部材との間に筒状の熱可塑性溶融プラスチック材料を射
出成型機で射出して前記接続部材と熱融着接合し一体化
したことを特徴とする電期融着式プラスチック管継手で
ある。

Description

【発明の詳細な説明】
【０００１】
【従来の技術】従来特開平２−３０５０８号公報で開示
された図３に示す電気融着式プラスチック管継手があ
る。このものは継手本体Ａの内周側一端から他端に亘っ
て電熱線２を埋設し、電熱線２の両端は本体Ａの両端に
設けたコネクターピン６と連結したものである。
【０００２】この種の管継手は通常金型内に溶融樹脂を
射出成型して形成する。また接続に当たっては本体Ａの
両端内面にプラスチック管Ｐ，Ｐを挿入し、コントロー
ラよりコネクターピン６にほぼ一定の出力電圧を通電し
て電熱線２を発熱させ、挿入したプラスチック管Ｐ，Ｐ
を同時に融着接続するものである。
【０００３】
【発明が解決しようとする課題】上記従来のプラスチッ
ク管継手は、接続する継手本体Ａの口径が大きくなると
継手本体の成形に大きな金型と大きな射出容量の射出成
型機が必要となり、成型作業も本体プラスチックの熱容
量との関係から成型時間が長くなり、困難を伴う。
【０００４】またプラスチック管Ｐとの接続作業におい
ても、継手本体Ａの両側に挿入した管Ｐ，Ｐを同時に融
着接続するため、発熱面積が大きくなり、電熱線２に通
電するコントローラの電力容量も大きなものが必要であ
る。すなわちコントローラの電力容量Ｗは電流Ｉ＊電圧
Ｅであり、電熱線に与える電気エネルギーＪは電流Ｉ＊
電圧Ｅ＊時間Ｔであるが、電熱線に通電する時間Ｔが大
きすぎてもまた小さすぎても適正な管との接続状態が得
られず、適正な接続状態を得るためには、継手本体Ａと
プラスチック管Ｐとの熱伝達の関係からある適正な通電
時間Ｔがある。
【０００５】このためコントローラの電力容量Ｗも電気
エネルギーＪに応じて大きなものが必要である。さらに
接続口の口径が異なる管継手の異径品では、両側に挿入
した管とを同時に接続するため、継手本体の大口径側の
電気エネルギーが不足したりあるいは小口径側の電気エ
ネルギーが過大になったりして両側の管共適正な接続状
態で接続するのが困難であった。
【０００６】本発明は上記の課題を解消して、継手本体
の口径が大きい管継手であっても大きな射出成型機を必
要とせずに成形が可能で、また接続に当たって容量の大
きなコントローラを用いなくとも融着接続でき、更に接
続口径に応じた適正な電力で融着接続できるプラスチッ
ク管継手を提供するものである。
【０００７】
【課題を解決するための手段】本発明は、接続プラスチ
ック管を内挿する筒状の内周側に電熱線を埋設し該電熱
線の両端は外面に突出するコネクターピンに連結した熱
可塑性プラスチック材料よりなる接続部材を複数個設
け、金型内に前記接続部材を管継手の端部になるように
装着し、該装着した接続部材と接続部材との間に筒状の
熱可塑性溶融プラスチック材料を射出成型機で射出して
前記接続部材と熱融着接合し一体化したことを特徴とす
る電期融着式プラスチック管継手である。
【０００８】
【作用】本発明によれば、金型内に射出する溶融樹脂が
金型内に装着した接続部材と接触する部分で溶融樹脂の
熱によって熱融着接合し一体化する。接続部材の溶融樹
脂との接触部分は接触面積が多くなるようにスリ−ブを
付けたりインロ−を付けたりすることが出来、溶融樹脂
の熱で接続部材側も溶融して一体の管継手が形成され
る。このため、特に大口径の管継手であっても射出容量
の大きな射出成型機や金型を用いなくても製作が容易に
出来、また射出容量が少なくて済むので成型時の成形作
業が容易に行える。またプラスチック管との接続作業に
おいても、管継手の接続口毎に通電して接続作業が行え
るため大容量のコントローラを用意しなくとも接続で
き、更に口径に応じた電力を通電して適正な接続状態が
得られる。
【０００９】
【実施例】以下本発明の実施例を図面を参照して説明す
る。図１において１０、１１は夫々別々に成型して得た
接続部材を示し、この接続部１０、１１は接続すべきプ
ラスチック管５０、５１を挿入できる内径を有し、筒状
で内周側に電熱線１２を螺旋状に埋設してある。接続部
材１０、１１の両端には外面側に突出するコネクターピ
ン１３、１４が夫々埋設してあり、このコネクターピン
１３、１４に電熱線１２の両端を接続してある。この接
続部材１０、１１は通常、熱可塑性プラスチック材料を
射出成型機によって金型内に射出して成形する。
【００１０】このようにして得た接続部材１０、１１を
管継手の端部になるようにマンドレル２１、２２に装着
して金型２内にマンドレル２１、２２と共に装着し、こ
の装着した接続部材１０と接続部材１１との間にランナ
−２より熱可塑性溶融プラスチック材料を射出成型機で
射出する。溶融樹脂は金型２の内面とマンドレル２１の
外面との間で筒状の中間部材が形成される。この場合射
出成型機の射出容量は端部側に配置した接続部１０、１
１を除くその中間部材を成型するだけの容量があればよ
く、大容量の成型機を必要としない。
【００１１】また金型２内に射出された溶融樹脂の熱容
量によって、金型の端部側に装着した接続部材１０、１
１の接触面が溶融し熱融着接合され、接続部材と一体化
した管継手が成型される。この場合、各接続部材１０、
１１の溶融樹脂との接触する側の端面に薄肉のスリ−ブ
１７をつけたり又は切り欠きを設けて金型内に射出する
溶融樹脂との接触面を多くし、溶融樹脂による熱融着接
合を強固なものとすることが出来る。金型２内に射出成
型した後、射出した溶融樹脂が冷却されて固化したら金
型２内から取り出し、成型品からマンドレル２１、２２
を取り除くと電気融着式プラスチック管継手が出来上が
る。
【００１２】管との接続に当たっては、図２のごとく継
手本体の一端側にプラスチック管５１を挿入した後、コ
ントローラ３をコネクターピン１３、１４に実線で示す
ごとく接続して電熱線１２に通電する。電熱線１２はプ
ラスチック管５１の挿入側継手本体の片側で一系統であ
り、発熱面積は両側同時に発熱させるものに比べて半分
のため、コントローラの電力容量も約半分のもので行
え、また管５１の口径や接続条件に応じた適正な融着接
続が行える。
【００１３】
【発明の効果】以上説明のごとく本発明の電気融着式プ
ラスチック管継手は、接続部材を熱融着接合して一体化
したものであるため、射出容量の大きな射出成形機を必
要とせず、またプラスチック管との接続作業に際しても
電力容量の小さなコントローラで大口径のプラスチック
管と接続することができる。更に口径に応じた電気エネ
ルギーでプラスチック管との適正な接続状態の融着接続
が行える。
【図面の簡単な説明】
図１ 実施例の接続部材を金型内に装着して管継手を成
型する際の状態を示す断面図。 図２ 実施例のプラスチック管を接続する際の状態を示
す部分断面図。 図３ 従来技術を示すプラスチック管継手の断面図。
【符号の説明】
１ 管継手本体 ２ 金型 ３ コントローラ １０、１１、 接続部材 １２ 電熱線 １３、１４コネクターピン １７ スリ−ブ ２１、２２ マンドレル ２３ ランナ− １５、１６ 接続部材の端面 ５０、５１ プラスチック管
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 健 三重県桑名市大福２番地日立金属株式会社 桑名工場内 (72)発明者 西方 伸広 三重県桑名市大福２番地日立金属株式会社 桑名工場内

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】 接続プラスチック管を内挿する筒状の内
    周側に電熱線を埋設し該電熱線の両端は外面に突出する
    コネクターピンに連結した熱可塑性プラスチック材料よ
    りなる接続部材を複数個設け、金型内に前記接続部材を
    管継手の端部になるように装着し、該装着した接続部材
    と接続部材との間に筒状の熱可塑性溶融プラスチック材
    料を射出成型機で射出して前記接続部材と熱融着接合し
    一体化したことを特徴とする電気融着式プラスチック管
    継手。
JP3327270A 1991-12-11 1991-12-11 電気融着式プラスチック管継手の製造方法 Expired - Fee Related JP2939032B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3327270A JP2939032B2 (ja) 1991-12-11 1991-12-11 電気融着式プラスチック管継手の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3327270A JP2939032B2 (ja) 1991-12-11 1991-12-11 電気融着式プラスチック管継手の製造方法

Publications (2)

Publication Number Publication Date
JPH05164287A true JPH05164287A (ja) 1993-06-29
JP2939032B2 JP2939032B2 (ja) 1999-08-25

Family

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Family Applications (1)

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004810A2 (en) * 1998-11-23 2000-05-31 Nupi S.p.A. Unions for double-wall tubes and dies for manufacturing the same
CN107270007A (zh) * 2017-07-10 2017-10-20 江苏大学 热熔型静电导除聚合物输油管弯管接头及制备方法
EP3404307A1 (de) * 2017-05-19 2018-11-21 Geberit International AG Fitting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004810A2 (en) * 1998-11-23 2000-05-31 Nupi S.p.A. Unions for double-wall tubes and dies for manufacturing the same
EP1004810A3 (en) * 1998-11-23 2000-07-19 Nupi S.p.A. Unions for double-wall tubes and dies for manufacturing the same
US6428054B1 (en) 1998-11-23 2002-08-06 Nupi S.P.A. Unions for double-wall tubes and dies therefor
EP3404307A1 (de) * 2017-05-19 2018-11-21 Geberit International AG Fitting
CN107270007A (zh) * 2017-07-10 2017-10-20 江苏大学 热熔型静电导除聚合物输油管弯管接头及制备方法

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