JP2007113715A - 熱可塑性樹脂製の管と継手の熱融着接合方法 - Google Patents

熱可塑性樹脂製の管と継手の熱融着接合方法 Download PDF

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JP2007113715A
JP2007113715A JP2005306705A JP2005306705A JP2007113715A JP 2007113715 A JP2007113715 A JP 2007113715A JP 2005306705 A JP2005306705 A JP 2005306705A JP 2005306705 A JP2005306705 A JP 2005306705A JP 2007113715 A JP2007113715 A JP 2007113715A
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thermoplastic resin
heat
joint
heater
pipe
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Takao Fujiwara
貴夫 藤藁
Kazunari Nishimura
一成 西村
Kosei Nomura
孝正 野村
Shuhei Nishida
秀平 西田
Takashi Tanemura
隆 種村
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JFE Pipe Fitting Mfg Co Ltd
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JFE Pipe Fitting Mfg Co Ltd
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    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled 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
    • B29C66/01—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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped 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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt 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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled 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
    • B29C66/50—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
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/90—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
    • B29C66/91211—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 with special temperature measurement means or methods
    • B29C66/91218—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 with special temperature measurement means or methods using colour change, e.g. using separate colour indicators
    • 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
    • B29C66/50—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
    • B29C66/71—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

Abstract

【課題】 ヒーターによる熱可塑性樹脂製継手の受口部の加熱溶融温度を簡単に目視確認できる熱可塑性合成樹脂製の管と継手の熱融着接合方法を提供する。
【解決手段】 熱可塑性樹脂製の管１の端部１ａと、それと同じ熱可塑性樹脂製の継手２の受口部３とをヒーター４で加熱溶融した後、前記ヒーター４を取り除き、前記加熱溶融された管１の端部１ａを受口部３内の挿入して融着一体化するに際し、前記加熱溶融に先立って、前記受口部３に該受口部の加熱溶融温度により変色する可逆性または非可逆性の示温材５を備える。
【選択図】 図１

Description

本発明は、ポリブテンやポリエチレン等熱可塑性樹脂製の管と継手の熱融着接合方法に係り、より詳しくは加熱温度管理を容易にした熱可塑性樹脂製の管と継手の熱融着接合方法に関する。
従来、熱可塑性樹脂製の管と継手（ヒートフュージョン継手）の熱融着接合方法として、図２（ａ）（ｂ）に示すように熱可塑性樹脂製管１０の端部１０ａの外面と、熱可塑性樹脂製継手１１の受口部１２の内面を専用のヒーター１３を用いて加熱溶融させた後、ヒーター１３を取り除き、同図（ｃ）のように加熱溶融された熱可塑性樹脂製管１０の端部１０ａを熱可塑性樹脂製継手１１の受口部１２に挿入圧着して接続する接合方法がある。
しかるに、上記熱融着接合方法では、使用前にヒーター１３の加熱用ヒーターフェース温度を確認することになっているがこれを怠ったり、また、ヒーター１３がこれのヒーターフェースに付着している汚れや油分が除去清掃されないまま使用されて熱可塑性樹脂製管１０の端部１０ａや熱可塑性樹脂製継手１１の受口部１２の内面が十分に加熱溶融されなかったりすることがあり、しかも、ヒーター１３により、果たして熱可塑性樹脂製管１０や熱可塑性樹脂製継手１１が所定の温度にまで上昇したか否かを簡単に確認できる手段が無かったため、両者の熱融着接合不足が生じることがあった。
本発明は、このような問題を解決するためになされたものであり、その目的とするところは、上記のような、ヒーターを用いての熱可塑性樹脂製の管と継手の熱融着接合方法において、ヒーターの加熱温度を簡単に目視確認でき、延いては管と継手の加熱溶融温度分布を簡単に確認できる熱可塑性樹脂製の管と継手の熱融着接合方法を提供することにある。
本発明は、熱可塑性樹脂製管の端部の外周面と、それと同じ熱可塑性樹脂製継手の受口部の内周面とをヒーターで加熱溶融した後、前記ヒーターを取り除いて、前記加熱溶融された管の端部を前記受口部内に挿入して融着一体化するに際し、前記加熱溶融するに先立ち、前記受口部に該受口部の加熱溶融温度により変色する可逆性または非可逆性の示温材を備えることに特徴を有するものである。
この場合において、前記示温材としては、前記受口部の開口端面に重合されるリング部と、このリング部の内周から一側方へ一体に突設されて前記受口部の開口端の内周に嵌め込まれる短筒状ボスとを有するリング状に形成されたものを使用することができる。
本発明によれば、熱可塑性樹脂製継手の受口部に該受口部の加熱溶融温度により変色する可逆性または非可逆性の示温材を備えることにより、ヒーターで熱可塑性樹脂製管の端部の外周面と、それと同じ熱可塑性樹脂製の継手の受口部の内周面とを加熱溶融する時に、ヒーターの加熱温度は該ヒーターと接触する示温材の色に反映されるため、その示温材の変色状態を目視確認することにより、ヒーターの加熱温度を容易に把握でき、延いては管の端部および受口部の内周面の温度が所定の加熱溶融温度までに到達したか否かを容易に把握できる。
すなわち、可逆性示温材または非可逆性示温材のいずれにおいても、ヒーターの加熱温度が所定の温度以上である場合に変色して、管の端部および受口部の内周面が所定の加熱温度で加熱溶融されることを表示する。この場合、可逆性示温材は、変色温度以下になれば原色に戻るため、ヒーターの加熱温度を即時的に表示する機能を有する。これに対して、非可逆性示温材は、変色温度より低くなっても色は変わらず、変色状態を維持するため、ヒーターの加熱温度がその変色温度以上になった経歴を表示する機能を有する。そして、このように、ヒーターの加熱温度を示温材の変色で確認できるため、ヒーターの加熱温度不足、延いては熱可塑性樹脂製管と熱可塑性樹脂製継手の熱融着接合不足の問題を解消することができる。
本発明の好適な実施形態を図面に基づき説明する。図１は本発明の方法による熱可塑性樹脂製の管と継手の熱融着接合工程図であって、（ａ）は管と継手を加熱溶融する前の工程を、（ｂ）は管と継手の加熱溶融工程を、（ｃ）は管と継手の熱融着接合工程をそれぞれ示している。
本発明による熱可塑性樹脂製管とそれと同じ熱可塑性樹脂製の継手の熱融着接合方法を工程順に説明する。
先ず、図１（ｂ）に示すように、ポリブテンやポリエチレン等のポリオレフィン系の樹脂、あるいはその他の熱可塑性樹脂製の管１の端部１ａの外周面と、それと同じ熱可塑性樹脂製の継手２の受口部３の内周面とをヒーター４を用いて加熱溶融するが、この加熱溶融に先立ち、同図（ａ）に示すように管１、継手２の加熱溶融温度により変色する可逆性または非可逆性の示温材５を継手２の受口部３に備える。示温材５としては、所定温度以上に加熱されると熱分解等の化学反応を起こして変色する示温顔料を含有するリング部５ａと、このリング部５ａの内周から一側方へ一体に突設された短筒状ボス５ｂとを有するリング状に形成されたものを使用し、そのリング部５ａを受口部３の開口端面３ａに重合させるとともに、筒状ボス５ｂを受口部３の開口端の内周３ｂに嵌め込む。この示温材５は、管１および継手２がポリブテンである場合、ヒーターフェース温度；２８０±１０°Ｃで変色するものを使用する。
しかる後、同図（ｂ）に示すように、継手２の受口部３と管１の端部１ａをヒーター４のヒーターフェース４ａ，４ｂに同時に真っ直ぐに挿入し、この状態を数秒間保持して管１の端部１ａの外周面と継手２の受口部３の内周面を加熱溶融する。このとき、示温材５がヒーターフェース４ａに接触して変色し、この変色状態を目視確認することにより、ヒーター４の加熱温度を容易に確認できる。したがって、加熱溶融不足を予防できる。
次いで、管１の端部１ａと継手２の受口部３からヒーター４を取り除いた後、直ぐに同図（ｃ）のように管１の端部１ａを継手２の受口部３に挿入し圧着して接合する。これにより管１の端部１ａと継手２の受口部３とを熱融着接合することができる。
上記実施例のように示温材５として、リング部５ａと短筒状ボス５ｂを有するリング状に形成されたものを使用すれば、筒状ボス５ｂを受口部３の開口端の内周３ｂに嵌め込むだけで簡易迅速に受口部３に備えることができるが、その他に、示温材５を受口部３に備える手段としては示温塗料を受口部３の開口端面３ａ及び開口端の内周３ｂに塗布するものであってもよい。
尚、本発明は、上記継手２が図示例のソケットタイプ以外に、エルボあるいはＴ型等である場合にも同様に適用できる。
本発明の方法による熱可塑性樹脂製の管と継手の熱融着接合工程図であって、（ａ）は管と継手を加熱溶融する前の工程を、（ｂ）は管と継手の加熱溶融工程を、（ｃ）は管と継手の熱融着接合工程を示す。 従来例の熱融着接合方法による熱可塑性樹脂製の管と継手の熱融着接合工程図であって、（ａ）は管と継手を加熱溶融する前の工程を、（ｂ）は管と継手の加熱溶融工程を、（ｃ）は管と継手の熱融着接合工程をそれぞれ示す。
符号の説明
１ 熱可塑性樹脂製管
１ａ 熱可塑性樹脂製管の端部
２ 熱可塑性樹脂製継手
３ 受口部
３ａ 受口部の開口端面
３ｂ 受口部の開口端の内周
４ ヒーター
５ 示温材
５ａ リング部
５ｂ 短筒状ボス

Claims (2)

  1. 熱可塑性樹脂製管の端部の外周面と、それと同じ熱可塑性樹脂製継手の受口部の内周面とをヒーターで加熱溶融した後、前記ヒーターを取り除いて、前記加熱溶融された管の端部を前記受口部内に挿入して融着一体化するに際し、前記加熱溶融するに先立ち、前記受口部に該受口部の加熱溶融温度により変色する可逆性または非可逆性の示温材を備えることを特徴とする、熱可塑性樹脂製の管と継手の熱融着接合方法。
  2. 前記示温材が、前記受口部の開口端面に重合されるリング部と、このリング部の内周から一側方へ一体に突設されて前記受口部の開口端の内周に嵌め込まれる短筒状ボスとを有するリング状に形成されている、請求項１記載の熱可塑性樹脂製の管と継手の熱融着接合方法。
JP2005306705A 2005-10-21 2005-10-21 熱可塑性樹脂製の管と継手の熱融着接合方法 Pending JP2007113715A (ja)

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JP2011231913A (ja) * 2010-04-30 2011-11-17 Suiko Kk 多層回転成形品の配管用継手及びその製造方法並びに配管用継手と多層回転成形品の溶着方法
CN102518899A (zh) * 2011-10-24 2012-06-27 韩路平 聚乙烯缠绕结构壁管材新型电熔连接承插口结构
WO2012155287A1 (zh) * 2011-05-13 2012-11-22 北京航天凯撒系统科技有限公司 一种全程免维护应用的曲弹矢量结构管道系统

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JP2011231913A (ja) * 2010-04-30 2011-11-17 Suiko Kk 多層回転成形品の配管用継手及びその製造方法並びに配管用継手と多層回転成形品の溶着方法
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CN102518899A (zh) * 2011-10-24 2012-06-27 韩路平 聚乙烯缠绕结构壁管材新型电熔连接承插口结构

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