JP3233789B2 - 熱可塑性樹脂管材の突合せ溶接装置 - Google Patents

熱可塑性樹脂管材の突合せ溶接装置

Info

Publication number
JP3233789B2
JP3233789B2 JP19553094A JP19553094A JP3233789B2 JP 3233789 B2 JP3233789 B2 JP 3233789B2 JP 19553094 A JP19553094 A JP 19553094A JP 19553094 A JP19553094 A JP 19553094A JP 3233789 B2 JP3233789 B2 JP 3233789B2
Authority
JP
Japan
Prior art keywords
heater
clamps
pipe
thermoplastic resin
tube
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 - Fee Related
Application number
JP19553094A
Other languages
English (en)
Other versions
JPH0857965A (ja
Inventor
啓嗣 三原
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 JP19553094A priority Critical patent/JP3233789B2/ja
Publication of JPH0857965A publication Critical patent/JPH0857965A/ja
Application granted granted Critical
Publication of JP3233789B2 publication Critical patent/JP3233789B2/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
    • 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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface direct heating of the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91951—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to time, e.g. temperature-time diagrams
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B29C65/1422—Far-infrared radiation [FIR]
    • 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
    • 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
    • B29C66/9141—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 temperature
    • B29C66/91421—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 temperature of the joining tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は樹脂で成形された管材を
突合せ溶接により接続する装置に関し、さらに詳しく
は、例えば超純水の輸送等のクリーン用途に利用される
熱可塑性樹脂管材（例えばＰＰＳ：ポリフェニレンサル
ファイドの成形品等）の接続に適した突合せ溶接装置に
関する。
【０００２】
【従来の技術】樹脂成形品の管材を接続する装置として
は、一対のクランプで管材を把持し、その各管材の端部
をヒータにより加熱溶融した後、各クランプを互いに接
近する向きへと移動させることによって、その各溶融部
分を突合せて融着する構造のものがある（例えば特開平
５−１９３００４号公報）。
【０００３】また、この種の突合せ溶接によりＰＰＳ等
の熱可塑性樹脂で成形された管材の接続を行う場合、管
端部の溶融は非接触のヒータ加熱で行うことが通例であ
る。これは、ＰＰＳの融点が２７０℃と高いので管端部
を溶融状態にまで加熱するにはヒータ温度を３００℃以
上に設定する必要があり、そのような高温加熱ではヒー
タ表面のコーティング材が存在せず、このため接触加熱
では管端面がヒータ面に付着し易くなる等の理由によ
る。
【０００４】
【発明が解決しようとする課題】ところで、非接触加熱
により管端部の溶融を行う場合、ヒータ熱板の表面積に
対し、加熱される管材の外径が比較的小さいときには、
管端面の外側部分が受ける熱量が内側部分に対して大き
くなるため、管外面側が急速に加熱され管端の肉厚方向
（径方向）の加熱むらが発生して管端部の溶融量に偏り
が生じることがある。
【０００５】そして、このような溶融量の偏りが生じる
と、接合時の接合荷重が溶融代の小さい管内側部分に集
中してしまい、外側部分には荷重が掛からなくなる結
果、接合強度が小さくなる、また外側部分が加熱されす
ぎて分解が生じる、といった不具合が発生する。
【０００６】本発明はそのよう点に鑑みてなされたもの
で、接合強度の信頼性が高い熱可塑性樹脂管材の突合せ
溶接装置の提供を目的とする。
【０００７】
【課題を解決するための手段】上記の目的を達成するた
めの構成を、実施例に対応する図１を参照しつつ説明す
ると、本発明は、一対のクランプ１，２にそれぞれ管材
１１，１２を把持した状態で、このクランプ間にヒータ
３を配置して各管材１１，１２の管端部を非接触の状態
で加熱溶融し、その各溶融部分を当該一対のクランプ
１，２の相対的な移動により突合わせるよう構成された
溶接装置において、ヒータ３には管端面１１ａ，１２ａ
と対向する面に、それぞれ、内径・外径が接続管材１
１，１２と略等しい直円筒形の突起３ｂが設けられ、か
つ、その各突起３ｂの円筒軸は、クランプ１と２の間に
ヒータ３を配置した状態で当該クランプの把持中心に一
致することによって特徴づけられる。
【０００８】
【作用】ヒータ３をクランプ１と２の間に配置すると、
突起３ｂの先端面と接続管材の管端面１１ａ，１２ａと
が対面し、この両者間に所定の間隔（１mm）を開けた状
態で管端部の加熱を行うと、その突起３ｂの先端面と対
面する管端面１１ａ，１２ａのみが集中的に加熱され、
ヒータ３に対し離れた位置となる管外周面及び内周面に
加わる熱量はごく僅かとなる。これにより、管端部の肉
厚方向にの加熱状態が均一となる。
【０００９】
【実施例】図１は本発明実施例の構成図で、(A) は要部
縦断面図，(B) はヒータ３のみを抽出して示す斜視図で
ある。
【００１０】まず、この例の溶接装置（全体構造は図示
せず）は、互いに対向する一対のクランプ１，２と、こ
のクランプ間に配置されるヒータ３を備えている。ヒー
タ３は、装置本体に対してスライドもしくは回動自在に
配設されており、一対のクランプ１，２の中間位置（使
用位置）と、クランプ１，２とは干渉しない位置（待機
位置）の２位置に選択的に移動可能となっている。
【００１１】さて、本発明実施例において注目すべきと
ころは、ヒータ３の熱板３ａの両面に、それぞれ、直円
筒形の突起３ｂを設けた点にある。この突起３ｂは、内
径・外径が接続管材１１，１２と略等しい寸法に加工さ
れており、また、この突起３ｂの円筒軸は、ヒータ３が
一対のクランプ１と２の間に位置した状態のときに、そ
のクランプ１，２の把持中心と一致する。従って、ヒー
タ３を使用位置に配置したときには、各管材の管端面１
１ａ，１２ａと突起３ｂの先端面とは互いに対面する位
置関係となる。
【００１２】さらに、ヒータ３の熱板３ａはアルミニウ
ム製で、その突起３ｂの先端面には波長５μｍ以上の赤
外線を放射率８０％以上で放射する材料Ｐ、例えばテツ
ゾールＢ−６６（耐熱塗料；商品名，日本ペイント株式
会社製）が塗布されている。
【００１３】次に、本発明実施例の作用を述べる。接合
対象を呼び径７５mmのＰＰＳ製パイプとして、その一対
のパイプ間に、前記の構造のヒータ３を配置し、このヒ
ータの突起３ｂの先端面と管端面との間に１mmの間隔を
開けた状態で管端部の加熱（ヒータ温度；４７０℃）を
行い、また熱板表面がフラットな従来のヒータを使用し
て、上記と同種のパイプの管端部を非接触で加熱（間隔
１mm）して、それぞれの加熱過程での各管端部の温度上
昇を測定したところ、図２のグラフに示す結果が得られ
た。
【００１４】なお、パイプの管端部の温度は、管外面か
ら１mmの位置と、管内面から１mmの位置の各部位にそれ
ぞれ熱電対を配置して、その各ポイントの温度（ＴA,ｔ
A;本発明実施例，ＴB,ｔB;従来）を測定した。
【００１５】以上の測定結果から、従来のヒータを使用
した場合、５０秒程度の加熱で管外側部の温度ＴB と管
内側部の温度ｔB との間に１００℃前後が温度差が生じ
たのに対し、本発明実施例のヒータ３を使用した場合に
は、管外側部の温度ＴA と管内側部の温度ｔA との間に
温度差が殆ど生じないことが確認できた。
【００１６】従って、本発明実施例のヒータ３を使用す
ると、管端部を均一に加熱することができ、ばらつきの
ない接合強度を得ることができる。しかも、突起３ｂの
先端面と対面する管端面１１ａ，１２ａのみが輻射熱
（遠赤外線）により加熱されるので、加熱が管端面から
熱伝導により軸方向にのみ進行し、これにより、管端部
が不必要に溶融されることがなく、溶融量をごく僅かと
した状態で加圧接合を行える。その結果、管内面へのビ
ードの突出量を最小限に抑えることができる。
【００１７】なお、以上の実施例では管端面を管軸に対
し直角な面としているが、各管材の管端面１１ａ，１２
ａの内側周縁の角に僅かな面取りを施しておけば、内面
ビードの突出高さを更に低くすることも可能になる。
【００１８】また、上記した非接触加熱時において、各
管端面１１ａ，１２ａと突起３ｂの先端面との間に開け
る間隔は１mm程度が好ましいが、その間隔は１mm以上で
あっても、本発明は実施可能である。
【００１９】ここで、以上の実施例では、ヒータの熱板
３ａに突起３ｂを一体形成した構造しているが、例えば
図３に示すように、突起１０３ｂを独立部品とし、それ
をヒータ熱板１０３ａにボルトナット等により着脱自在
に装着する構造（ヒータフェイス方式）とすれば、接続
配管のサイズ替えを容易に行うことができる。
【００２０】また、サイズ替えの容易化をはかる場合、
図４(A) 〜(C) に示すように、熱板２０３ａの内部に、
複数種の管サイズに応じた径の直円筒体２０３ｂ1 〜２
０３ｂ3 を配設し、その各直円筒体を、接続管材のサイ
ズに応じて、熱板２０３ａから自在に出し入れできる、
といった構造を採用してもよい。なお、各直円筒体２０
３ｂ1 〜２０３ｂ3 を出し入れする機構は、ここでは省
略するが、ねじ機構またはカム機構などを利用すれば実
現可能である。
【００２１】さらに、本発明実施例では、ヒータの熱板
３ａ（突起３ｂを含む）をアルミニウム製としている
が、その熱板の材質は、特に限定はなく、例えば鉄、真
鍮、ステンレスあるいはセラミックスであってもよい。
また、ヒータは、カートリッジ式のもの、あるいは鋳込
みヒータのいずれであってもよい。さらにまた、突起３
ｂの先端面への遠赤外線放射材料の塗布はなくても、先
と同等な効果は達成できる。
【００２２】なお、本発明の突合せ接続装置は、ＰＰＳ
のほか、例えばＰＥＥＫ（ポリエーテルエーテルケト
ン），ＰＥＳ（ポリエーテルサルフォン），ＰＥＴ（ポ
リエチレンテレフタレート）またはＰＶＤＦ（ポリフッ
化ビニリデン）などの高融点の熱可塑性樹脂で成形され
た管材の突合せ接続に適している。
【００２３】
【発明の効果】以上説明したように、本発明の突合せ溶
接装置によれば、内径・外径が接続管材と略等しい直円
筒形の突起をヒータに設け、その突起の先端面と接続管
材の管端面とを対面させた状態で、管端部の加熱溶融を
行うように構成したから、管端部を均一に加熱すること
が可能となり、これにより接合部の肉厚方向における接
合強度のばらつきがなくなる。その結果、接合強度の信
頼性が向上する。
【図面の簡単な説明】
【図１】本発明実施例の構成図で、(A) は要部縦断面
図，(B) はヒータ３のみを抽出して示す斜視図
【図２】管端部の温度測定結果を示す図で、加熱時間に
対する管端部の温度上昇を示すグラフ
【図３】本発明の他の実施例のヒータの構成を示す図
【図４】本発明の更に別の実施例のヒータの構成を示す
図
【符号の説明】
１，２ クランプ ３ ヒータ ３ａ 熱板 ３ｂ 突起（円筒形） １１，１２ 管材（ＰＰＳ製） １１ａ，１２ａ 管端面

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】 熱可塑性樹脂で成形された管材を突合せ
    融着によって接続する装置であって、互いに対向する一
    対のクランプとヒータを有し、上記一対のクランプにそ
    れぞれ管材を把持した状態で、このクランプ間に上記ヒ
    ータを配置して各管材の管端部を非接触の状態で加熱溶
    融し、その各溶融部分を当該一対のクランプの相対的な
    移動により突合わせるよう構成された溶接装置におい
    て、上記ヒータには管端面と対向する面に、それぞれ、
    内径・外径が接続を行う管材と略等しい直円筒形の突起
    が設けられ、かつ、その各突起の円筒軸は、上記クラン
    プ間に上記ヒータを配置した状態で当該クランプの把持
    中心に一致することを特徴とする熱可塑性樹脂管材の突
    合せ溶接装置。
JP19553094A 1994-08-19 1994-08-19 熱可塑性樹脂管材の突合せ溶接装置 Expired - Fee Related JP3233789B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19553094A JP3233789B2 (ja) 1994-08-19 1994-08-19 熱可塑性樹脂管材の突合せ溶接装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19553094A JP3233789B2 (ja) 1994-08-19 1994-08-19 熱可塑性樹脂管材の突合せ溶接装置

Publications (2)

Publication Number Publication Date
JPH0857965A JPH0857965A (ja) 1996-03-05
JP3233789B2 true JP3233789B2 (ja) 2001-11-26

Family

ID=16342627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19553094A Expired - Fee Related JP3233789B2 (ja) 1994-08-19 1994-08-19 熱可塑性樹脂管材の突合せ溶接装置

Country Status (1)

Country Link
JP (1) JP3233789B2 (ja)

Also Published As

Publication number Publication date
JPH0857965A (ja) 1996-03-05

Similar Documents

Publication Publication Date Title
EP0167870B1 (en) Welding fluoropolymer pipe and fittings
JP3347903B2 (ja) 熱可塑性樹脂管材の突合せ溶接装置
JP3233789B2 (ja) 熱可塑性樹脂管材の突合せ溶接装置
EP1202853B1 (en) Beadless welding apparatus
JP2004167884A (ja) 熱融着による熱可塑性樹脂管の接合方法並びにそれに用いる管状継手、融着装置及びその方法により接合される接合構造
JPH0872150A (ja) 熱可塑性樹脂管材の突合せ溶接装置
JPH0857963A (ja) 熱可塑性樹脂管材の突合せ溶接方法
JPH07304101A (ja) 熱可塑性樹脂管材の突合せ溶接方法
JPH0857964A (ja) 熱可塑性樹脂管材の突合せ溶接方法
JPH06226854A (ja) プラスチック管の融着方法
JP2592914B2 (ja) 熱可塑性合成樹脂製管の融着接合構造及び融着接合方法
JPH08142196A (ja) 熱可塑性樹脂管材の突合せ溶接方法
JPH08216261A (ja) 熱可塑性樹脂管の接合方法
JPH03110134A (ja) 管体およびその接合方法
JPH08156102A (ja) 熱溶着可能な樹脂製管状部品の自動溶着装置
JP2000110981A (ja) 樹脂管の接合方法
JPH0811217A (ja) フッ素樹脂製配管の溶着管継ぎ手の加工方法
JPH0347871Y2 (ja)
JPH048535A (ja) プラスチック管の接合方法
JPH0957854A (ja) 熱可塑性樹脂管材の融着方法及び融着機
JPH07117117A (ja) 管継手の製造方法
JPH0699501A (ja) チューブ材の接続装置
JPH0796547A (ja) 管材の融着接合方法
JPS6255494B2 (ja)
JPH0444831A (ja) 加熱装置

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees