JPH09323358A - Fusion bonding method - Google Patents

Fusion bonding method

Info

Publication number
JPH09323358A
JPH09323358A JP14387696A JP14387696A JPH09323358A JP H09323358 A JPH09323358 A JP H09323358A JP 14387696 A JP14387696 A JP 14387696A JP 14387696 A JP14387696 A JP 14387696A JP H09323358 A JPH09323358 A JP H09323358A
Authority
JP
Japan
Prior art keywords
current
joint
voltage
constant
fusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14387696A
Other languages
Japanese (ja)
Inventor
Masaya Iwasaki
雅也 岩崎
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP14387696A priority Critical patent/JPH09323358A/en
Publication of JPH09323358A publication Critical patent/JPH09323358A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—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
    • 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
    • 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
    • B29C66/87—Auxiliary operations or devices
    • B29C66/872—Starting or stopping procedures
    • 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
    • B29C66/9131—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91311—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 heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
    • B29C66/91315—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 heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the current intensity
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—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 heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—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 heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • 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
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91631—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 heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being kept constant over time
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • 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
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags

Landscapes

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

Abstract

(57)【要約】 【課 題】電圧基準で設計されたエレクトロフュージョ
ン継手でも、継手の種類に応じて電流値を設定するよう
なプログラムを組むことなく、定電流制御にて融着接合
できるようにし、定電流制御のメリット、すなわちショ
ートによる異常過熱を生ずることなく、品質上も確実な
融着ができるようにする。 【解決手段】継手２に定電圧回路より一定電圧で通電を
開始し、電圧が安定したときの電流値を電流計測手段４
で計測してＲＡＭ８に記憶させる。以後は通電が終了す
るまでＣＰＵ６が電流調節手段３を制御し、上記電流値
を維持して融着接合を行う。 (57) [Summary] [Subject] Even for electrofusion joints designed with voltage reference, fusion welding can be performed by constant current control without programming to set the current value according to the joint type. Therefore, the merit of the constant current control, that is, the fusing can be reliably performed in terms of quality without causing abnormal overheating due to a short circuit. SOLUTION: A current value at a time when a voltage is stabilized by starting energization of a joint 2 with a constant voltage from a constant voltage circuit is measured by a current measuring means 4
Is measured and stored in the RAM 8. After that, the CPU 6 controls the current adjusting means 3 until the energization ends, and the fusion current is maintained while maintaining the current value.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明が属する技術分野】本発明は、エレクトロフュー
ジョン継手と合成樹脂管との融着接合方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fusion bonding an electrofusion joint and a synthetic resin pipe.

【０００２】[0002]

【従来技術】上下水道管やガス管などの使用されるプラ
スチック管の継手として近年開発されたものにエレクト
ロフュージョン継手がある。この継手は、管との接合面
に電熱線をコイル状に埋設した成形品よりなるもので、
管との融着は、継手を管端部に嵌挿するか、管外周面に
側方より押し付けた状態で通電し、接合面を加熱溶融す
ることにより行われ、継手の通電方式には従来、電圧を
一定に制御して通電する定電圧方式と、電流を一定に制
御して通電する定電流方式の二つのタイプのものがあ
る。このうち、前者の定電圧方式では、継手の種類や口
径（以下、単に「種類」という）ごとに電圧と通電時間
を設定するか、或いは電圧は一定で、通電時間のみを設
定し、これをプログラムに組んでコントローラに格納し
ており、コントローラは、継手の種類の識別を、例えば
コントローラより継手に弱い検査用電流を流すか、融着
用電流を流したときの抵抗値を検出することにより行
い、識別した継手の種類に応じた電圧を設定時間掛ける
か、或いは一定の電圧を設定時間掛けて融着を行ってい
る。2. Description of the Related Art An electrofusion joint has been recently developed as a joint for plastic pipes such as water and sewer pipes and gas pipes. This joint consists of a molded product in which the heating wire is embedded in a coil shape on the joint surface with the pipe,
The fusion with the pipe is performed by inserting the joint into the pipe end or energizing it while pressing it against the outer peripheral surface of the pipe from the side and heating and melting the joint surface. There are two types: a constant voltage system in which the voltage is controlled to be constant and the current is applied, and a constant current system in which the current is controlled to be constant and the current is supplied. Among them, in the former constant voltage method, the voltage and energization time are set for each joint type and diameter (hereinafter simply referred to as "type"), or the voltage is constant and only the energization time is set. The program is stored in the controller and stored in the controller.The controller identifies the type of joint by, for example, passing a weak inspection current to the joint from the controller or detecting the resistance value when the welding current is passed. The fusion is performed by applying a voltage according to the type of the identified joint for a set time or a constant voltage for a set time.

【０００３】一方、後者の定電流方式では、継手の種類
ごとに電流と通電時間を設定したプログラムを組んで、
これをコントローラに格納しており、コントローラは上
記と同様にして継手の種類を識別し、その種類に応じた
電流を設定時間流して融着を行っている。On the other hand, in the latter constant-current method, a program is set in which the current and the energizing time are set for each type of joint,
This is stored in the controller, and the controller identifies the type of the joint in the same manner as described above, and the electric current according to the type is applied for a set time to perform fusion bonding.

【０００４】[0004]

【発明が解決しようとする課題】上述する通電方式のう
ち、定電圧方式によるものは制御が容易であることから
一般にはこの方式が採用されているが、問題は通電中、
電熱線同士が接触してショートすることである。ショー
トすると、電熱線の抵抗値が低下するため電流が上昇す
るが、電圧を一定にしておくと、供給される電気エネル
ギー量が多くなり、電熱線が過熱される。その結果、電
熱線周囲の樹脂も過熱されて劣化し、融着不良を来たす
ようになる。Among the energizing methods described above, the one using the constant voltage method is generally adopted because it is easy to control.
The heating wires come into contact with each other and short-circuit. When short-circuited, the resistance value of the heating wire decreases, so that the current increases, but if the voltage is kept constant, the amount of supplied electric energy increases and the heating wire is overheated. As a result, the resin around the heating wire is also overheated and deteriorated, resulting in poor fusion.

【０００５】この点、定電流方式では、ショートした際
に異常加熱されることがないため安全であり、またショ
ートした部分以外の融着面は影響が少ないため、品質上
も確実な融着が可能となる。本発明は、設計が容易な、
一定電圧で融着するように設計された定電圧制御用のエ
レクトロフュージョン継手と合成樹脂管とを定電流制御
にて融着接合することにより、上述するタイプの継手の
ショートによる問題を解消しようとするものである。In this respect, the constant current method is safe because abnormal heating does not occur when a short circuit occurs, and the fusion surface other than the short circuit area has little influence, so that reliable fusion can be achieved in terms of quality. It will be possible. The present invention is easy to design,
By fusion-bonding an electrofusion joint for constant voltage control and a synthetic resin pipe designed to be fused at a constant voltage by constant current control, an attempt is made to solve the problem due to a short circuit of the joint of the type described above. To do.

【０００６】[0006]

【課題の解決手段】すなわち本発明は、エレクトロフュ
ージョン継手と合成樹脂管とを融着接合する方法におい
て、該エレクトロフュージョン継手に所定電圧で融着用
電流を流したときの電流初期値を検出したのち、その検
出値に基づいて定電流制御を行うことを特徴とする。従
来の定電流制御では、継手の種類ごとに電流値を設定し
たプログラムを組み、継手の種類を、融着用電流を流し
たときの抵抗値、或いは端子に設けた抵抗器に微弱な検
査用電流を流したときの抵抗値を検出することによって
識別し、その継手に対応して定められた電流値で定電流
制御するようになっており、プログラムにない新たな種
類の継手を設計するとき、或いは従来の継手の設計変更
を行うときには、プログラムの内容を変えたり、追加し
たりする手間が必要になる。That is, the present invention provides a method for fusion-bonding an electrofusion joint and a synthetic resin pipe, after detecting an initial value of a current when a fusion current is applied to the electrofusion joint at a predetermined voltage. The constant current control is performed based on the detected value. In the conventional constant current control, a program that sets the current value for each joint type is assembled, and the joint type is set to the resistance value when the welding current is applied, or the weak inspection current to the resistor installed at the terminal. It is designed to identify by detecting the resistance value when flowing, and to control a constant current with a current value determined corresponding to that joint, when designing a new type of joint not in the program, Alternatively, when changing the design of a conventional joint, it is necessary to change and add the contents of the program.

【０００７】これに対し本発明方法では、新たな種類の
継手を設計するときも、従来の継手を設計変更するとき
にも継手の種類ごとにプログラムの内容を変えたり、追
加したりする必要がないばかりでなく、上述のプログラ
ム自体も組む必要がない。本発明における融着用電流検
出用の電圧は、継手の種類を識別することによって変え
られるようにしてもよいが、好ましくは継手の種類の如
何にかゝわらず一定にされる。継手の種類ごとに電圧を
設定したプログラムを組む必要がなくなるからである。On the other hand, in the method of the present invention, it is necessary to change or add the contents of the program for each type of joint when designing a new type of joint or when changing the design of a conventional joint. Not only is there no need to build the above program itself. The voltage for detecting the welding current in the present invention may be changed by identifying the type of joint, but is preferably made constant regardless of the type of joint. This is because there is no need to build a program that sets the voltage for each type of joint.

【０００８】したがって別の好ましい発明は、上記発明
のエレクトロフュージョン継手が継手の種類の如何にか
ゝわらず、一定電圧で通電することにより融着できるよ
うに設計製作されたものであることを特徴とする。通電
時間は、継手の種類ごとに時間を設定したプログラムを
組み、継手の種類を識別して通電時間を決めるようにさ
れるが、継手の種類の如何にかゝわらず、通電時間を一
定にしてもよい。この場合、継手の種類を識別する必要
がなくなる。Therefore, another preferred invention is characterized in that the electrofusion joint of the above invention is designed and manufactured so that it can be fused by energizing at a constant voltage regardless of the kind of joint. And The energization time is set by setting a program that sets the time for each joint type, and the energization time is determined by identifying the joint type.However, the energization time should be constant regardless of the joint type. May be. In this case, it is not necessary to identify the type of joint.

【０００９】したがって更に別の発明は、上記発明のエ
レクトロヒュージョン継手が継手の種類の如何にかゝわ
らず、一定時間かつ一定電圧で通電することにより融着
できるように設計製作されたものであることを特徴とす
る。継手の種類を識別する場合には、例えば継手に融着
用電流を流したときの電熱線の抵抗値、継手の端子が突
出する差込み口に形成される孔の深さ、外径、肉厚等を
検出する位置検出センサーの出力値、継手又は管把持器
と一体形成される記録板に形成される凹凸や孔の有無を
読取るセンサーの出力、記録板に形成される磁片の数及
び配置、磁気テープ、バーコード等を読取るセンサーの
出力に基づいて識別される。Therefore, a further invention is designed and manufactured so that the electrofusion joint of the above invention can be fused by energizing the electrofusion joint for a certain time and at a constant voltage regardless of the kind of the joint. It is characterized by When identifying the type of joint, for example, the resistance value of the heating wire when a welding current is applied to the joint, the depth of the hole formed in the insertion port from which the joint terminal protrudes, the outer diameter, the wall thickness, etc. The output value of the position detection sensor for detecting the, the output of the sensor for reading the presence or absence of irregularities or holes formed on the recording plate integrally formed with the joint or the pipe gripper, the number and arrangement of magnetic pieces formed on the recording plate, It is identified based on the output of a sensor that reads a magnetic tape, bar code, or the like.

【００１０】通電時には、図１に示すように立上がり時
の電圧が不安定である。そのため定電流制御は、図１に
示すように電圧が安定してから行い、電圧が安定するま
では定電圧で通電するのが望ましい。電圧が安定する時
間は、通常０．３〜３秒程度である。したがって更に別
の好ましい発明は、上述の電流初期値の検出が通電開始
後、電圧が安定するために必要な時間経過後に行われる
ことを特徴とし、別の発明は、電圧が安定するために必
要な時間が０．３秒から３秒であることを特徴とする。When energized, as shown in FIG. 1, the rising voltage is unstable. Therefore, it is desirable that the constant current control be performed after the voltage becomes stable as shown in FIG. 1, and that the constant current be applied until the voltage becomes stable. The time for the voltage to stabilize is usually about 0.3 to 3 seconds. Therefore, still another preferred invention is characterized in that the detection of the initial value of the current is performed after the start of energization and after a lapse of time necessary for the voltage to stabilize, and another invention is required for the voltage to stabilize. The characteristic time is 0.3 seconds to 3 seconds.

【００１１】[0011]

【発明の実施の形態】図２は、本発明方法で使用する融
着装置の一例を示すもので、スイッチ手段１と、可変抵
抗器よりなり、継手２への通電時における電流を調節す
る電流調節手段３と、通電時における電流を計測する電
流計測手段４と、電流計測手段４で計測された電流値に
基づいて電流調節手段３を制御するコントローラ５とよ
りなり、コントローラ５は、ＣＰＵ６と、制御プログラ
ム及び継手の種類ごとに異なる抵抗値に対応して設定し
た通電時間を組み込んだプログラムを格納したＲＯＭ７
と、ＲＯＭ７から読みだした通電時間に関するデータ及
び電流計測手段４で計測した電流値を一時的に記憶する
ＲＡＭ８と、クロック発生器９とからなっている。FIG. 2 shows an example of a fusing device used in the method of the present invention, which is composed of a switch means 1 and a variable resistor, and which adjusts the current when the joint 2 is energized. The controller 5 includes an adjusting unit 3, a current measuring unit 4 that measures a current during energization, and a controller 5 that controls the current adjusting unit 3 based on the current value measured by the current measuring unit 4. The controller 5 includes a CPU 6 and a CPU 6. , ROM 7 storing a control program and a program incorporating the energization time set corresponding to the resistance value that differs for each type of joint
And a RAM 8 for temporarily storing the data on the energization time read from the ROM 7 and the current value measured by the current measuring means 4, and a clock generator 9.

【００１２】融着を開始するため、コントローラ５の図
示省略したスタートボタンを押すと、ＣＰＵ６からの制
御信号によりスイッチ手段１がＯＮとなり、図示省略し
た定電圧回路より一定電圧、例えば７５Ｖの融着電流が
継手２に通される。通電が開始されると、電流計測手段
４で計測された電流値からＣＰＵ６が抵抗値を算出し、
その抵抗値に対応して設定された時間をＲＯＭ７から求
めてＲＡＭ８に記憶させる。When the start button (not shown) of the controller 5 is pressed to start the fusion, the switch means 1 is turned on by the control signal from the CPU 6, and the constant voltage circuit (not shown) fuses a constant voltage, for example, 75V. Electric current is passed through joint 2. When energization is started, the CPU 6 calculates the resistance value from the current value measured by the current measuring means 4,
The time set corresponding to the resistance value is obtained from the ROM 7 and stored in the RAM 8.

【００１３】ＣＰＵ６はまた、クロック発生器９を参照
し、参照時間が電圧の安定する時間に達したとき、その
ときの電流値をＲＡＭ７に記憶させ、以後設定された通
電時間が経過するまでＲＡＭ７に記憶された電流値が維
持されるように電流調節手段３を制御する。通電の終了
は、クロック発生器を参照し、参照時間が設定時間に達
したとき、ＣＰＵ６からの制御信号によりスイッチ手段
１をＯＦＦにすることにより行われる。The CPU 6 also refers to the clock generator 9, stores the current value at that time in the RAM 7 when the reference time reaches the time when the voltage stabilizes, and thereafter, the RAM 7 continues until the set energization time elapses. The current adjusting means 3 is controlled so that the current value stored in the memory is maintained. The energization is terminated by referring to the clock generator and turning off the switch means 1 by the control signal from the CPU 6 when the reference time reaches the set time.

【００１４】図３は、融着装置の別の例を示すもので、
図２に示す融着装置に更に電圧調節手段１１が設けら
れ、ＲＯＭ７には抵抗値に対応して通電時間と電圧を設
定したプログラムが格納されている。本装置において
は、通電が開始されると、検出された抵抗値から通電時
間と電圧が求められ、ＲＡＭ８に記憶される。そしてＣ
ＰＵ６が電圧調節手段１１を制御し、通電時の電圧をそ
の継手の種類に応じて設定した電圧に切り換える。以後
は上記と同様で、電圧が安定する時間に達すると、その
ときの電流値で以後定電流制御される。FIG. 3 shows another example of the fusing device.
The fusion device shown in FIG. 2 is further provided with a voltage adjusting means 11, and the ROM 7 stores a program for setting the energization time and the voltage corresponding to the resistance value. In this device, when the energization is started, the energization time and the voltage are obtained from the detected resistance value and stored in the RAM 8. And C
The PU 6 controls the voltage adjusting means 11 to switch the voltage during energization to the voltage set according to the type of the joint. After that, when the time for the voltage to stabilize is reached, the same current value is used for constant current control.

【００１５】[0015]

【発明の効果】本発明は以上のように構成され、次のよ
うな効果を奏する。請求項１記載の融着接合方法によれ
ば、一定電圧で融着するように設計製作されたエレクト
ロフュージョン継手でも定電流制御することができ、定
電流制御によるメリット、すなわちショートしても異常
過熱されることがなく安全であり、品質上も確実な融着
ができる、というメリットを持たせることができる。し
かも定電流制御のため従来のように、継手の種類ごとに
電流値を設定するようなプログラムを組む必要がない
し、設計変更や新たな種類の継手を設計する際にも電流
値に関するプログラムの内容に手を加える必要もない。The present invention is configured as described above and has the following effects. According to the fusion bonding method of claim 1, constant current control can be performed even with an electrofusion joint designed and manufactured to fuse at a constant voltage, and the merit of constant current control, that is, abnormal overheating even when short-circuited It is possible to provide the merit that it is safe and that fusion is possible in terms of quality. Moreover, because of the constant current control, it is not necessary to set up a program to set the current value for each joint type as in the past, and the contents of the program related to the current value can be used when changing the design or designing a new type of joint. There is no need to change the

【００１６】請求項２記載の融着接合方法によれば、継
手の種類に応じて電圧を設定する必要がないため、プロ
グラムがより簡単となる。請求項３記載の融着接合方法
のように、通電時間を一定にすれば、プログラムがより
簡単となるうえ、継手の種類を識別する必要もなくな
る。請求項４記載の融着接合方法によれば、電圧が安定
するために必要な時間を経過した時点での電流初期値で
定電流制御が行われるため、抵抗値が同じ継手であれ
ば、同じ電流が計測され、一定の品質の融着が可能とな
る。According to the fusion bonding method of the second aspect, it is not necessary to set the voltage according to the type of the joint, so that the program becomes simpler. If the energization time is constant as in the fusion bonding method according to the third aspect, the program becomes simpler and it is not necessary to identify the type of joint. According to the fusion bonding method of claim 4, constant current control is performed at the initial value of the current at the time when the time required for the voltage to stabilize becomes constant. The current is measured and a certain quality of fusion is possible.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明方法による融着時の電圧と電流のタイム
チャート。FIG. 1 is a time chart of voltage and current during fusion bonding by the method of the present invention.

【図２】本発明方法で用いる融着装置のブロック図。FIG. 2 is a block diagram of a fusing device used in the method of the present invention.

【図３】別の融着装置のブロック図。FIG. 3 is a block diagram of another fusing device.

【符号の説明】[Explanation of symbols]

１・・スイッチ手段 ２・・エレクトロ
フュージョン継手 ３・・電流調節手段 ４・・電流計測手
段 ５・・コントローラ ６・・ＣＰＵ ７・・ＲＯＭ ８・・ＲＡＭ ９・・クロック発生器 １１・・電圧調節
手段1 ... Switching means 2 ... Electrofusion joint 3 ... Current adjusting means 4 ... Current measuring means 5 ... Controller 6 ... CPU 7 ... ROM 8 ... RAM 9 ... Clock generator 11 ... Voltage adjustment means

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】エレクトロフュージョン継手と合成樹脂管
とを融着接合する方法において、該エレクトロフュージ
ョン継手に所定電圧で融着用電流を流したときの電流初
期値を検出したのち、その検出値に基づいて定電流制御
を行うことを特徴とする融着接合方法。1. In a method for fusion-bonding an electrofusion joint and a synthetic resin pipe, an initial value of a current when a fusion current is applied to the electrofusion joint at a predetermined voltage is detected, and then based on the detected value. A fusion bonding method characterized in that constant current control is performed. 【請求項２】前記エレクトロフュージョン継手が、継手
の種類の如何にかゝわらず、一定電圧で通電することに
より融着できるように設計製作されたものであることを
特徴とする請求項１記載の融着接合方法。2. The electrofusion joint is designed and manufactured so that it can be fused by energizing at a constant voltage regardless of the joint type. Fusion bonding method. 【請求項３】前記エレクトロフュージョン継手が、継手
の種類の如何にかゝわらず、一定時間かつ一定電圧で通
電することにより融着できるように設計製作されたもの
であることを特徴とする請求項１記載の融着接合方法。3. The electrofusion joint is designed and manufactured so that it can be fused by energizing the electrofusion joint for a certain period of time and at a constant voltage regardless of the type of the joint. Item 1. The fusion bonding method according to Item 1. 【請求項４】前記電流初期値の検出が通電開始後、電圧
が安定するために必要な時間経過後に行われることを特
徴とする請求項１ないし３のいづれかの請求項に記載の
融着接合方法。4. The fusion splicing according to claim 1, wherein the detection of the initial value of the current is performed after the start of energization and after a lapse of time necessary for the voltage to stabilize. Method. 【請求項５】前記電圧が安定するために必要な時間が
０．３秒から３秒であることを特徴とする請求項４記載
の融着接合方法。5. The fusion bonding method according to claim 4, wherein the time required for the voltage to stabilize is 0.3 to 3 seconds.
JP14387696A 1996-06-06 1996-06-06 Fusion bonding method Pending JPH09323358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14387696A JPH09323358A (en) 1996-06-06 1996-06-06 Fusion bonding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14387696A JPH09323358A (en) 1996-06-06 1996-06-06 Fusion bonding method

Publications (1)

Publication Number Publication Date
JPH09323358A true JPH09323358A (en) 1997-12-16

Family

ID=15349071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14387696A Pending JPH09323358A (en) 1996-06-06 1996-06-06 Fusion bonding method

Country Status (1)

Country Link
JP (1) JPH09323358A (en)

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