JPH01178437A - 電気融着式プラスチック管の接続方法 - Google Patents

電気融着式プラスチック管の接続方法

Info

Publication number
JPH01178437A
JPH01178437A JP63001732A JP173288A JPH01178437A JP H01178437 A JPH01178437 A JP H01178437A JP 63001732 A JP63001732 A JP 63001732A JP 173288 A JP173288 A JP 173288A JP H01178437 A JPH01178437 A JP H01178437A
Authority
JP
Japan
Prior art keywords
plastic pipe
temperature
pipe joint
connector
energization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP63001732A
Other languages
English (en)
Other versions
JP2513757B2 (ja
Inventor
Hiroshi Oya
博 大矢
Takeshi Kato
健 加藤
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP63001732A priority Critical patent/JP2513757B2/ja
Priority to EP19880440108 priority patent/EP0323793A1/en
Publication of JPH01178437A publication Critical patent/JPH01178437A/ja
Priority to US07/467,341 priority patent/US5150923A/en
Application granted granted Critical
Publication of JP2513757B2 publication Critical patent/JP2513757B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
    • F16L47/28—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe
    • 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"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/12—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged 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
    • B29C66/50—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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/874—Safety measures or devices
    • B29C66/8748—Safety measures or devices involving the use of warnings
    • 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
    • B29C66/914—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
    • B29C66/91411—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 parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/91441—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 the temperature being non-constant over time
    • B29C66/91443—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 the temperature being non-constant over time following a temperature-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
    • B29C66/91—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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—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
    • B29C65/348—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 with a polymer coating
    • 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
    • B29C66/91212—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 involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/91317—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 electrical resistance
    • 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
    • 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

Landscapes

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

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】
［産業上の利用分野］ 本発明は、プラスチック管とプラスチック管継手とを電
気融着して接続する方法に関し、特に電気融着式プラス
チック管接続方法における接続工程の表示に関する。 ［従来の技術］ 従来の電気融着式プラスチック管継手の接続方法を、例
えば一般的によく用いられるソケット型管継手に用いた
場合について第４図をもとに説明する。 第４図はソケット型管継手であるソケット１にプラスチ
ック管２Ａと同じ＜２Ｂとを電気融着して接続しようと
する状態を示している。 ソケット１は、はぼ円筒状のプラスチック管継手本体１
１と、このプラスチック管継手本体［［の円周面に埋込
んだ電熱線１２と、この電熱線１２の両端各々に接続し
下部をプラスチック管継手本体１１両端の外周面に埋込
み、上部をこの外周面より突出させた２本のコネクター
ピン１３とからなっている。 このソケット１の両端の２本のコネクターピン１３各々
に制御装置６のコネクター３を差込み、このコネクター
３は配線分岐器４を経由して制御装置本体５に配線接続
している。 ここで、制御装置本体５を通じて電流をソケット１の電
熱線１２に通じて、プラスチック管２Ａとプラスチック
管２Ｂとをソケット１を介して電気融着して接続する。 従来この接続方法における車制御方法および制御工程の
表示は次のような方法および表示であった。 制御方法については、ソケット１にプラスチック管２Ａ
と同じ＜２Ｂとを嵌合してセットし、ソケット１の２本
のコネクタービン１３各々に制御装置６のコネクター３
を差込み、プラスチック管２Ａと同じ＜２Ｂとの接続準
備が完了である。 この後、制御装置本体５に電源を入力しこの中に設置し
た温度計にて気温を測定し、この温度に適した電流通過
時間をタイマーにてセットする。 このタイマーの時間セットは自動あるいは手動にて行う
。 次に、制御装置本体５の通電開始ボタンを押して電流を
通じ、タイマーで自動的にソケット１への通電を停止す
る。 最後に、ソケット１のコネクターピン１３よりコネクタ
ー３を抜いてプラスチック管２Ａおよびプラスチック管
２Ｂとソケット１との電気融着式の接続が終了する。 この接続制御方法における工程の表示については、制御
装置本体５に電源を入力したときの電源表示ランプ点灯
、および制御装置本体５の通電開始ボタンを押してソケ
ット１に電流を通じてからタイマーで通電を停止、終了
するまでの間の通電表示ランプ点灯があった。 ［発明が解決しようとする問題点１ 以上説明したソケット１の接続方法における制御方法お
よび制御工程の表示では、ソケット１に通電が終了した
後、コネクター３の取りはずすタイミングの表示がなく
、そのタイミングは通電終了後一定時間経過後に行う必
要があるが作業者の判断にまかされていた。 従って、ソケット１とプラスチック管２人および２Ｂと
の融着部分が溶融中にコネクター３をコネクターピン１
３から引き抜く恐れがあり、このとき融着部分に外力が
加わり融着不良の原因となっていた。 本発明の目的は、プラスチック管継手の電気融着式接続
方法において、通電が終了したとき制御装置６のコネク
ター３をプラスチック管継手のコネクターピン１３から
引き抜くタイミングの表示を行うことにより、融着不良
のない完全な接続が容易に行える電気融着式プラスチッ
ク管継手の接続方法を提供することである。 ［問題点を解決するための手段］ 本発明はプラスチック管と、内周面に電熱線を埋込みこ
の電熱線の両端各々と接続したコネクターピンを外周面
より突出させたプラスチック管継手とを電気融着式にて
接続する方法において、まず第１番目に、温度センサー
を用いて前記プラスチック管継手への通電を制御するた
めの制御装置に電源を入れて、前記プラスチック管継手
のコネクターピンと前記制御装置のコネクターとを接続
し、 第２番目に、前記温度センサーにより前記プラスチック
管継手の通電以前の初期温度を測定して通電時間を設定
し、あるいは前記プラスチック管継手の通電による上昇
温度の最高温度を設定して、前記プラスチック管継手に
通電を開始し、第３番目にこの通電の停止後に前記プラ
スチック管継手の低下温度を測定し、前記コネクターの
取りはずし可能な温度を設定して前記低下温度が前記設
定温度に達するかしないかの表示を行うことを特徴とす
る電気融着式プラスチック管の接続方法である。この電
気融着式プラスチック管の接続方法によれば、プラスチ
ック管継手への通電終了後、制御装置のコネクターとプ
ラスチック管継手のコネクターピンとの取りはずしのタ
イミングを音声・ランプなどにて合図・表示しているの
で適切なタイミングでその取りはずし作業ができ、その
取りはずしか早過ぎて融着不良を起したり、余分な待ち
時間を費すこともない。 ［実施例］ 本発明によるプラスチック管継手とプラスチック管との
電気融着式接続方法の実施例を第１図〜第３図に示す。 第１図はプラスチック管継手１の一端部とプラスチック
管２との接続部分を示す縦断面図である。この第１図に
おけるプラスチック管継手１の全体を第２図に縦断面図
で示す。 このプラスチック管継手１は［従来の技術］の欄で説明
したプラスチック管継手１とほぼ同様であるが、外周面
に熱電対挿入用の穴１５を設けである。 従ってプラスチック管継手１はプラスチック管継手本体
１１、電熱線１２、およびコネクターピン１３が従来の
プラスチック管継手１のそれらと全くあるいはほぼ同じ
であり、さらにプラスチック管２も［従来の技術］のプ
ラスチック管２と同じである。 次に第１図を用いて、本実施例の接続方法、制御方法を
説明する。 まず、第１番目にプラスチック管継手１に接続しようと
するプラスチック管２を挿入する。これも従来の接続の
ためのプラスチック管継手１へのプラスチック管２の挿
入と同じである。 第２番目にプラスチック管継手１のコネクターピン１３
にコネクター３を挿入し、接続する。ここでコネクター
３はコネクタービン１３と嵌合する穴を持つコネクター
ブツシュ３３とこのコネクターブツシュ３３とほぼ平行
な位置関係にある熱電対３１と、これらコネクターブツ
シュ３３、熱電対３１を一体に保持するホルダー３２と
からなっている。 プラスチック管継手１にこのコネクター３を接続したと
き、コネクター３の熱電対３１の下端部はプラスチック
管継手１の熱電対用の穴１５のなかに入っており、その
最下端部は熱電対用の穴１５の底と軽く接触している。 第３番目に制御装置本体（図示していない。）よりコネ
クター３を通じプラスチック管継手１に通電する。 第４番目にプラスチック管継手１の温度が上昇し、設定
温度、本実施例である中密度ポリエチレンの管および管
継手の場合は約１３０℃に達したとき、通電を停止する
。 第５番目にプラスチック管継手１への通電停止後この低
下温度をｎ１定し、コネクター３のプラスチック管継手
からの取りはずしか可能な温度、すなわち外力を加えて
も融着部の接合状態に影響をあたえない温度、本実施例
である中密度ポリエチレンの管および管継手の場合的６
０℃に達したとき、この表示、すなわち温度表示あるい
はこの温度に基ず（ブザー・音声などの合図を出す。 ６番目にコネクター３をプラスチック管継手１よりはず
して接続は完了する。 以上説明したプラスチック管継手１とプラスチック管２
との接続方法における第２番目から第５番目までの制御
装置の動作フローを説明したのが第３図である。まず制
御装置に電源を入れて、制御装置の電源スィッチを手動
でＯＮにすると自動的に７１ｉランプが点灯する。次に
ノーヒユーズブレーカ−（ＮＦＢ）を手動でＯＮにする
。 ここで前記した接続方法の第２番目で説明したコネクタ
ー３がコネクタービン１３に接続しているか、さらに熱
電対３１および電熱線１２に断線がないかを確認し問題
がなければ準備完了の表示を行う。 この表示はランプ点灯あるいはブザーあるいは「準備完
了」との音声でもよい。もし異常があれば断線接続エラ
ーの表示を行う。 この第３図において、二＝＝コ内勤作は手動にて行う動
作を示し［二二］内勤作は自動的に行われる動作を示し
ている。 準備完了の表示が行われた後、手動にてスタートスイッ
チをＯＮにするとスタートランプが点灯し熱電対３１が
ブ°ラスチック管継手１の初期温度を自動的にａｌ定し
、この温度に適した通電終了温度を設定する。引続き自
動的にタイマーが作動しスタートしこれと同時に通電が
開始し通電ランプが点灯する。このときＮＦＢが当初の
ＯＮの状態のままであるかないか、判定しＯＮであれば
次のステップへ、ＯＮでなければ、すなわちＯＦＦであ
れば電流異常ランプが点灯する。 前記したＮＦＢがＯＮのときの次のステップは、プラス
チック管継手１に流れる電流値が大き過ぎたり小さ過ぎ
たりしていないか、すなわち、ある設定幅内に入ってい
るかの確認である。電流値がある設定幅内に入っておれ
ば次のステップへ、入っていなければ電流トラブルラン
プが点灯する。 前記「次のステップ」はプラスチック管継手１が通電終
了温度的（１３０℃）に達したかをチエツクし通電終了
温度に達していなければ熱電対の故障等の異常による限
界時間オーバーをチエツクし、限界時間に達した場合通
電を停止し、時間異常ランプを点灯する。 限界時間に達していなければ、通電終了温度に達するま
で通電を続けてから通電停止する。 通電停止と同時に通電ランプを消灯しかつ、ブザー等の
音を出し通電終了の表示を行う。また、ブザーの代りに
「通電終了しました」などの音声でもよい。 つづいて冷却中のランプを点灯し、プラスチック管継手
１がコネクターを取りはずしてもよい温度約（８０℃）
に達したかを確認し、ＹＥＳであれば冷却中のランプを
消灯し、コネクター取りはずしＯＫのランプを点灯し、
同時にブザー等の音を出して知らせる。ＮｏであればＹ
ＥＳになるまで待ってこの後の冷却中のランプ消灯およ
びコネクター取りはずしＯＫのランプ点灯などを行う。 以上説明した本実施例のプラスチック管継手１とプラス
チック管２との電気融着式接続方法によれば、プラスチ
ック管継手１に通電を開始するための準備であるコネク
ター３とコネクタービン１３との接続の確認を行い表示
しているので、準備不完全のまま通電することがない。 さらにプラスチック管継手１への通電終了を音声によっ
て表示しているので離れていたり、明るい日中でも通電
終了の確認がし易い効果がある。さらに熱電対によって
直接プラスチック管継手の初期温度を測定する為、温度
の設定は、誤差が小さく正確であり、適正な通電制御が
出来、完全な融着が容易に行えるようになった。 さらに通電終了後にプラスチック管継手１とプラスチッ
ク管２との融着部の接合強度が充分確保できる温度まで
冷却したことを確認してからコネクター３のプラスチッ
ク管継手１からの取りはずしか出来るので、融着不良の
心配もなく、待ち過ぎの心配もない。 以上説明した実施例はソケット型管継手で２本のプラス
チック管２を直線に接続するプラスチック管継手１であ
ったが、９０℃或いは４５℃方向にプラスチック管２を
曲げて接続するエルボ、さらに３本のプラスチック管２
を接続するＴ１あるいはバイブから枝管を取り出す際に
用いるサドル型のプラスチック管継手の場合も以上説明
した実施例と同様の方法で接続することができ、その効
果も同じである。ま六、本実施例で用いた熱電対をサー
ミスタに代えてもよく、同様の効果がある。 本実施例の接続方法は、プラスチック管継手１の初期温
度を測定し、プラスチック管継手１への通電を終了する
温度を設定したが、他にプラスチック管継手１の初期温
度は測定しないで、通電終了温度を設定する場合がある
。 さらに本実施例の接続方法では通電の終了温度を設定し
たが、他の接続方法として、通電前のプラスチック管継
手の温度を測定して通電時間を設定してもよい。 この場合、通電停止後の制御工程は本実施例と同様であ
る。
【発明の効果】
以上説明したとおり、本発明によるプラスチック管継手
とプラスチック管の電気融着式接続方法はプラスチック
管継手への通電終了後、コネクター取りはずしＯＫのタ
イミングを音声・ブザーφ点灯などにより表示するので
、この取りはずしか早過ぎたり、待ち過ぎたりすること
がなく、完全なプラスチック管とプラスチック管継手の
融むが容易に行える効果がある。
【図面の簡単な説明】
第１図は本発明による実施例で用いるプラスチツク管継
手、プラスチック管およびコネクターの部分を示す縦断
面図、第２図は実施例で用いたプラスチック管継手の縦
断面図、第３図は制御装置の動作フローを示す図、第４
図は従来例を示す制′御装置と、プラスチック管および
プラスチック管継手の縦断面図である。 １・・・プラスチック管継手、１２・・・電熱線。 １３・・・コネクタービン、　　　２・・・プラスチッ
ク管。 ３・・・コネクター、　　　　　３１・・・熱電対。 ３３・・・コネクターブツシュ。

Claims (1)

  1. 【特許請求の範囲】 １）プラスチック管と、内周面に電熱線を埋込みこの電
    熱線の両端各々と接続したコネクターピンを外周面より
    突出させたプラスチック管継手とを電気融着式にて接続
    する方法において、 まず第１番目に、温度センサーを用いて前記プラスチッ
    ク管継手への通電を制御するための制御装置に電源を入
    れて、前記プラスチック管継手のコネクターピンと前記
    制御装置のコネクターとを接続し、 第２番目に、前記温度センサーにより前記プラスチック
    管継手の通電以前の初期温度を測定して通電時間を設定
    し、あるいは前記プラスチック管継手の通電による上昇
    温度の最高温度を設定して、前記プラスチック管継手に
    通電を開始し、 第３番目にこの通電の停止後に前記プラスチック管継手
    の低下温度を測定し、前記コネクターの取りはずし可能
    な温度を設定して前記低下温度が前記設定温度に達する
    かしないかの表示を行うことを特徴とする電気融着式プ
    ラスチック管の接続方法。
JP63001732A 1987-06-29 1988-01-07 電気融着式プラスチック管の接続方法 Expired - Fee Related JP2513757B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP63001732A JP2513757B2 (ja) 1988-01-07 1988-01-07 電気融着式プラスチック管の接続方法
EP19880440108 EP0323793A1 (en) 1988-01-07 1988-12-22 Method for connecting plastic pipes
US07/467,341 US5150923A (en) 1987-06-29 1990-01-22 Plastic pipe joint assembly for joining sections of plastic pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63001732A JP2513757B2 (ja) 1988-01-07 1988-01-07 電気融着式プラスチック管の接続方法

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JPH01178437A true JPH01178437A (ja) 1989-07-14
JP2513757B2 JP2513757B2 (ja) 1996-07-03

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JP63001732A Expired - Fee Related JP2513757B2 (ja) 1987-06-29 1988-01-07 電気融着式プラスチック管の接続方法

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230517A (ja) * 1988-07-20 1990-01-31 Sekisui Chem Co Ltd 溶着継手
KR100763047B1 (ko) * 1998-11-26 2007-10-02 만네스만 파우데오 아게 버터플라이 밸브 바디
JP2008209008A (ja) * 2008-06-06 2008-09-11 Hitachi Metals Ltd 電気融着継手

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5569890A (en) * 1989-04-28 1990-11-29 Wavin B.V. Sleeve-shaped weld connecting piece of thermoplastic material with weld indicator element, and welded joint formed therewith
CA2179165A1 (en) * 1993-12-15 1995-06-22 Masaru Kumagai Electrofusion fastening apparatus
FR3003349B1 (fr) * 2013-03-18 2015-04-03 Gdf Suez Dispositif de mesure de l'evolution d'un champ de temperature et procede associe d'evaluation de la qualite d'une operation de soudage
FR3103408B1 (fr) * 2019-11-27 2022-12-09 Arkema France Procédé d’évaluation d’un assemblage par soudage de pièces à base de matériaux thermoplastiques

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MC1581A1 (fr) * 1983-12-02 1985-02-04 Toutelectric Procede pour le controle du temps de soudage
GB2151858B (en) * 1983-12-16 1987-10-28 British Gas Corp Coupling including means for identifying heat-sealable fittings having a socket (8)
DE3561484D1 (en) * 1984-08-08 1988-02-25 Fischer Ag Georg Shaped piercing piece consisting of weldable plastics
AU585551B2 (en) * 1984-11-29 1989-06-22 Wavin Ag Electrically weldable joining member for application to pipeline parts
GB2172947B (en) * 1985-03-25 1988-07-27 British Gas Plc Apparatus for fusion joining of thermoplastic pipes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230517A (ja) * 1988-07-20 1990-01-31 Sekisui Chem Co Ltd 溶着継手
KR100763047B1 (ko) * 1998-11-26 2007-10-02 만네스만 파우데오 아게 버터플라이 밸브 바디
JP2008209008A (ja) * 2008-06-06 2008-09-11 Hitachi Metals Ltd 電気融着継手

Also Published As

Publication number Publication date
EP0323793A1 (en) 1989-07-12
JP2513757B2 (ja) 1996-07-03

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