JP2870662B2 - 熱可塑性パイプ材を密封接続する方法 - Google Patents

熱可塑性パイプ材を密封接続する方法

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Publication number
JP2870662B2
JP2870662B2 JP2115696A JP11569690A JP2870662B2 JP 2870662 B2 JP2870662 B2 JP 2870662B2 JP 2115696 A JP2115696 A JP 2115696A JP 11569690 A JP11569690 A JP 11569690A JP 2870662 B2 JP2870662 B2 JP 2870662B2
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Japan
Prior art keywords
pipe material
adjacent
thermoplastic
sleeve
pipe
Prior art date
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Expired - Lifetime
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JP2115696A
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English (en)
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JPH0361525A (ja
Inventor
ジエイムズ・エイ・インホフエ・ジユニア
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SENTORARU PURASUTEIKUSU CO
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SENTORARU PURASUTEIKUSU CO
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Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/50—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible
    • B29C33/505—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible cores or mandrels, e.g. inflatable
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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"
    • B29C65/3472—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
    • B29C66/01—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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap 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
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • 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
    • 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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/58—Heating hoses; Heating collars
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

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

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、熱可塑性パイプ材を密封接続する方法、特
に、直径の大きい熱可塑性パイプ材の隣接端部を電気的
融着により密封接続する方法に関する。
［従来の技術］ 熱可塑性材料から直径の大きいパイプを製造するため
に今日まで種々の押出し及び成形方法が開発、使用され
ていた。多数のこのような方法は、テープの隣接端部及
び表面が融着されるように押出しされたプラスチックを
溶融状態でマンドレルの周りに巻着させる段階を含んで
いる。巻着された熱可塑性材料を冷却してマンドレルか
ら取り外すと、固形管状パイプが形成される。
［発明が解決しようとする課題］ 熱可塑性材料からなる直径の大きいパイプは耐劣化性
に優れ、軽量であり且つ実質的に使用が限定されないた
めに、例えば大型の水路及び下水道路への適用が増大し
ている。しかしながら、パイプ直径が大きいために、隣
接するパイプ材の端部の密封接続はこれまでやっかいで
あり且つコスト高であった。
［課題を解決するための手段］ 本発明によれば、第１及び第２の熱可塑性パイプ材の
隣接端部を電気的融着により密封接続する方法であっ
て、 （ａ）縦方向の割れ目を有する熱可塑性スリーブのコネ
クタを、第１の熱可塑性パイプ材の端部に置いて第１の
パイプ材の長さに沿って移動し、端部に隣接する第１の
パイプ材の部分を露出させる段階と、 （ｂ）第２のパイプ材を第１のパイプ材と一列に並べて
置き、第２のパイプ材の端部を、隣接露出部分を有する
第１のパイプ材の端部に隣接して位置させる段階と、 （ｃ）第１のパイプ材における端部に隣接する露出部分
の少なくとも一部の外側面、並びに第１のパイプ材の端
部に隣接する第２のパイプ材の端部の外側面の周りに電
気抵抗加熱線を巻き付ける段階と、 （ｄ）スリーブを、各パイプ材の隣接端部並びにパイプ
材に巻き付けられた電気抵抗加熱線を覆う位置に移動さ
せる段階と、 （ｅ）スリーブ及び各パイプ材の隣接部分を構成する熱
可塑性材料が互いに密封融着するのに要する時間、電気
抵抗加熱線に電流を加える段階と、 （ｆ）前述の（ｅ）段階を実行する前に、又はそれと同
時にスリーブにおける割れ目の面を互いに融着する段階
とを備えている方法が提供される。
［作用］ スリーブコネクタはこれに形成された縦方向の割れ目
を含んでいるため、割れ目の面を広げて離間させること
によりスリーブの内径を拡大することできる。割れ目の
面は又、必要により、接続されるべきパイプ材の外径の
変化に従ってスリーブコネクタの内径を小さくするよう
に切り詰めることができる。割れ目の面はスリーブをパ
イプ材に電気的に融着させる前にあるいはそれと同時
に、加熱アイロン突合せ融接技術又は電気的融着技術を
使用して融着される。
［実施例］ 本発明がもっと簡単に理解され得るように、添付図面
を参照して単に実施例として以下の説明を行う。
本発明によれば、直径の大きい一対の熱可塑性パイプ
材の隣接端部を電気的融着により密封接続する方法を提
供する。該方法は電気抵抗加熱線の埋込まれていない熱
可塑性スリーブコネクタを使用している。その代わり
に、加熱線は接続されるべきパイプ材の端部部分の外面
上に巻回されている。
第１図を参照すると、縦方向の割れ目66を含む熱可塑
性スリーブコネクタ52がパイプ材54の端部上に配置され
且つパイプ材54の長さに沿って矢印56の方向に移動させ
られる。次に第２図に示す如く、第２のパイプ材58が配
置され、その端部はパイプ材54の端部に隣接している。
電気抵抗加熱線60はパイプ材54、58の隣接端部に近い該
パイプ材の端部部分上に巻回される。加熱線60の反対側
の端部部分62、64はそれぞれパイプ材54、58の外面から
外側に伸びている。
縦方向の割れ目66があるために、コネクタ52の内径は
パイプ材54、58上でのコネクタの移動を簡単にするため
に該割れ目66の面を広げてより大きくされ得る。
第３図を参照すると、次にスリーブコネクタ52が矢印
68の方向に向けて第４図に示す位置に移動させられる。
第４図ではスリーブコネクタ52はパイプ材54、58の隣接
端部上及び該パイプ材上に巻回された電気抵抗加熱線60
上にある。一旦適切に配置されると、加熱線60の端部部
分62、64は割れ目66を貫通させられ、該割れ目66の面は
移動させられ且つ公知の突合せ融接又は電気的融着の装
置及び技術を使用して融着される。パイプ材54、58の隣
接端部をスリーブコネクタ52に密封接続するために、ス
リーブコネクタ52とパイプ材54、58との隣接部分を構成
する熱可塑性材料が融着されるのに十分な時間、加熱線
の端部部分62、64を介して電流が加熱線60に加えられ
る。
上述した方法及びスリーブコネクタを更に説明するた
めに、次の具体例を示す。
具体例 外径が約61cmの熱可塑性パイプ材が以下の如く電気的
融着により密封接続される。内径が約61cmで、外径が約
66cmで、長さが約61cmの熱可塑性スリーブコネクタが一
方のパイプ材の端部上に配置され且つ該パイプ材の長さ
に沿って移動させられる。スリーブコネクタは該スリー
ブコネクタに形成された縦方向の割れ目を含んでいる。
第２のパイプ材が第１のパイプ材と整列して配置され、
それにより第１のパイプ材の端部は第２のパイプ材の端
部に隣接して配置される。長さが30.5mで、直径が約2mm
の電気抵抗加熱用銅線がパイプ材の隣接端部に最も近い
該パイプ材の外面の周りに巻着される。スリーブコネク
タはパイプ材の隣接端部上及びパイプ材上に巻着されて
いる加熱線上を移動させられる。加熱線の反対側の端部
部分はコネクタの割れ目を貫通させられる。コネクタの
割れ目の面は加熱アイロンを使用して融着させられる。
加熱線の端部を介して電流が抵抗加熱線に加えられ、そ
れによりスリーブコネクタとパイプ材との隣接部分を構
成する熱可塑性材料が密封融着される。
【図面の簡単な説明】 第１図は割れ目を有するスリーブコネクタがその上に配
置されている、直径の大きい熱可塑性パイプ材の斜視
図、第２図は第２のパイプ材が第１のパイプ材と整列さ
れて、電気抵抗加熱線がパイプ材の端部部分上に巻回さ
れた後の第１図のパイプ材を示す斜視図、第３図は割れ
目を有するスリーブコネクタがパイプ材の隣接端部上の
位置に向かって移動する間の第２図のパイプ材を示す
図、第４図はスリーブコネクタがパイプ材の隣接端部上
に配置されて、コネクタの割れ目の面が融着された後の
第３図のパイプ材を示す図である。 52……スリーブコネクタ、54、58……パイプ材、60……
電気抵抗加熱線、62、64……端部部分、66……割れ目。
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 65/34 F16L 47/02

Claims (3)

    (57)【特許請求の範囲】
  1. 【請求項１】第１及び第２の熱可塑性パイプ材の隣接端
    部を電気的融着により密封接続する方法であって、 （ａ）縦方向の割れ目を有する熱可塑性スリーブのコネ
    クタを、前記第１の熱可塑性パイプ材の端部に置いて該
    第１のパイプ材の長さに沿って移動し、該端部に隣接す
    る第１のパイプ材の部分を露出させる段階と、 （ｂ）前記第２のパイプ材を前記第１のパイプ材と一列
    に並べて置き、該第２のパイプ材の端部を、前記隣接露
    出部分を有する前記第１のパイプ材の端部に隣接して位
    置させる段階と、 （ｃ）前記第１のパイプ材における端部に隣接する露出
    部分の少なくとも一部の外側面、並びに該第１のパイプ
    材の端部に隣接する前記第２のパイプ材の端部の外側面
    の周りに電気抵抗加熱線を巻き付ける段階と、 （ｄ）前記スリーブを、各パイプ材の隣接端部並びに該
    パイプ材に巻き付けられた前記電気抵抗加熱線を覆う位
    置に移動させる段階と、 （ｅ）前記スリーブ及び各パイプ材の隣接部分を構成す
    る熱可塑性材料が互いに密封融着するのに要する時間、
    前記電気抵抗加熱線に電流を加える段階と、 （ｆ）前記（ｅ）段階を実行する前に、又はそれと同時
    に前記スリーブにおける割れ目の面を互いに融着する段
    階とを備えている方法。
  2. 【請求項２】前記熱可塑性パイプ材及び前記熱可塑性ス
    リーブのコネクタがポリオレフィン樹脂からなる請求項
    １に記載の方法。
  3. 【請求項３】前記（ｃ）段階に従って各パイプ材に巻き
    付けられた前記電気抵抗加熱線の端部が、前記（ｅ）段
    階を実行して前記割れ目の面を互いに融着する前に、前
    記スリーブの割れ目に通される請求項１又は２に記載の
    方法。
JP2115696A 1989-05-01 1990-05-01 熱可塑性パイプ材を密封接続する方法 Expired - Lifetime JP2870662B2 (ja)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299047A (en) * 1995-03-21 1996-09-25 Uponor Ltd Manufacture of electrofusion fittings
FI103267B (fi) 1996-05-23 1999-05-31 Uponor Innovation Ab Menetelmä putkiyhteen valmistamiseksi ja putkiyhde
DE202005020977U1 (de) * 2004-04-29 2006-12-28 Friatec Ag Vorrichtung zum Verbinden von Bauteilen aus schmelzbarem Kunststoff
CN106827448B (zh) * 2017-03-21 2023-05-26 四川业勃利亨桂骄明威管业有限公司 一种钢塑复合缠绕管带材挤塑模具
CN108775456A (zh) * 2018-07-25 2018-11-09 张家港市凯利雅特种纺织纱线有限公司 一种用于氨纶纱加热的蒸汽管道密封结构
CN111070622B (zh) * 2019-12-14 2021-04-06 浙江大学 一种挤出方式制备的短纤维增强塑料电熔管件的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378672A (en) * 1966-03-18 1968-04-16 Susquehanna Corp Insulated, electrical resistance wire and welding sleeve made therefrom
US3584198A (en) * 1968-02-29 1971-06-08 Matsushita Electric Works Ltd Flexible electric surface heater
DE2053938A1 (de) * 1970-10-26 1972-04-27 Mannesmann Ag Verfahren und Vorrichtung zum Herstel len einer zum Verbinden von thermoplasti sehen Kunststoffrohren dienenden Schweiß muffe
CH576326A5 (ja) * 1974-12-06 1976-06-15 Fischer Ag Georg
DE3540193C1 (de) * 1985-11-13 1987-04-23 Friedrichsfeld Gmbh Elektro-Schweissfitting oder Schweissmuffe
JPS61294291A (ja) * 1986-03-12 1986-12-25 矢野技研株式会社 流体輸送管への分岐管接合方法
CH671444A5 (ja) * 1986-06-25 1989-08-31 Fischer Ag Georg
JPH0739120B2 (ja) * 1988-07-20 1995-05-01 積水化学工業株式会社 溶着継手の製造方法

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GB2232330B (en) 1993-05-26
JPH0361525A (ja) 1991-03-18
GB2232330A (en) 1990-12-05
GB9009645D0 (en) 1990-06-20

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