JPH06265082A - 電気融着継手 - Google Patents

電気融着継手

Info

Publication number
JPH06265082A
JPH06265082A JP5053951A JP5395193A JPH06265082A JP H06265082 A JPH06265082 A JP H06265082A JP 5053951 A JP5053951 A JP 5053951A JP 5395193 A JP5395193 A JP 5395193A JP H06265082 A JPH06265082 A JP H06265082A
Authority
JP
Japan
Prior art keywords
pipe
joint
fusion
layer
carbon black
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
JP5053951A
Other languages
English (en)
Inventor
Shuji Fukushima
修司 福島
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 JP5053951A priority Critical patent/JPH06265082A/ja
Publication of JPH06265082A publication Critical patent/JPH06265082A/ja
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
    • 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
    • B29C65/3432—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 comprising several wires, e.g. in the form of several independent windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—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
    • B29C66/11—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
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1286—Stepped joint cross-sections 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
    • B29C66/5221—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
    • B29C66/50—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
    • B29C66/52293—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being external
    • 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
    • B29C66/52295—Joining tubular articles involving the use of a socket said socket comprising reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/12—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

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

Abstract

(57)【要約】 【目的】 特に水用配管に使用して融着部が塩素などで
冒されて劣化することのない電気融着継手を提供するこ
と。 【構成】 少なくとも内面が熱可塑性樹脂からなるパイ
プを接続するための継手であって、熱可塑性樹脂からな
り、前記パイプの内面に差し込む差口を少なくとも１つ
備えると共に、該差口の外面に電熱線を設けたことを特
徴とする電気融着継手。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、電気融着継手に関し、
特に水道などの水用配管に用いられる電気融着継手に関
する。
【０００２】
【従来の技術】従来の電気融着継手（以下単に継手とい
うことがある。）は、図７に示すように継手本体10の受
口10ａ，10ｂの内面に電熱線20を巻いて設け、その両端
にコネクタピン30ａ，30ｂを接続したものが知られてい
る。（例えば特開平４−19494号参照）継手本体10の材
料は熱可塑性樹脂で通常ポリエチレンから成形される
が、その形状は一般的なソケット以外に、エルボ、チー
ズ、レジューサ、クロス、ヘッダ等があげられる。いず
れにしても、これらの電気融着継手は１つ以上の受口を
有する継手であって、接続しようとするパイプをこの受
口に差し込み、継手の内面とパイプの外面を電気融着し
て接合するというものであった。
【０００３】一方、これらの電気融着継手は都市ガス等
のガス用配管で普及がはかられてきたが、最近では水道
等の水用配管でも使用されつつある。水道配管に使用さ
れる樹脂製パイプとしては、屋外でも使えるように耐食
性を考慮してカーボンブラックを配合したポリエチレン
パイプ（以下一層パイプということがある。）が一般的
である。ところが一般にカーボンブラックが配合された
樹脂は、塩素を含む水に長時間接触すると機械的強度は
低下し剥離等の劣化が生じる。そこで耐塩素水性も向上
させるために、カーボンブラックを配合しないポリエチ
レン樹脂からなる内層と、カーボンブラックを配合した
ポリエチレン樹脂からなる外層とを有する多層構造のポ
リエチレンパイプ（以下二層パイプということがあ
る。）を使用することも多くなってきた。
【０００４】
【発明が解決しようとする課題】上記の電気融着継手と
二層パイプを電気融着した場合、継手の受口にパイプを
差し込む形となるので、カーボンブラックを含有した外
層表面部分と継手の受口内面部分が融着されることにな
る。従って、使用時は図７に示すようにパイプ５の端面
は流水にさらされたままで、なおかつ隙間Ｃを通じて融
着部ｆにも水が侵入することになる。ところが、特にこ
の融着部は熱応力が残留しており、上記したカーボンブ
ラック含有部分の塩素による劣化が促進される。従って
二層パイプであってもその特性が生かされず融着部から
の漏れが発生するという問題があった。本発明は、上記
問題点を解決するもので融着部が塩素などで冒されるこ
とのない電気融着継手構造を提供することを目的とす
る。
【０００５】
【課題を解決するための手段】本発明の電気融着継手
は、先ず第１に従来の電気融着継手というものが全てパ
イプを差し込む受口構造を有し、継手の内面とパイプの
外面を融着接合する構造だけであったのに着目し、これ
とは逆に継手本体にパイプの内面側に差し込む差口を形
成し、この差口の外面に直接電熱線を巻いて、継手の外
面とパイプの内面を融着接合する電気融着継手としたも
のである。第２にこの継手の材質は従来通りポリエチレ
ン等の熱可塑性樹脂からなるが、差し込まれる側のパイ
プとしては熱可塑性樹脂の中でも、カーボンブラックを
配合しない内層と、カーボンブラックを配合した外層か
らなる二層パイプであると水用配管としては効果的であ
り、これによって前記継手本体と前記二層パイプによる
電気融着継手構造をとることが望ましい。また前記継手
本体の内面にはステンレス、青銅等の耐食性を有する金
属部材、あるいはガラス繊維等で強化したプラスチック
部材を装着しておくことが望ましい。
【０００６】
【作用】本発明の継手の融着部は差口構造であるので、
電熱線の装着は単に差口部の外面に巻いて設けるだけで
良く、継手の製作作業が容易となる。また、少なくとも
内面が熱可塑性樹脂からなる例えば二層パイプによる融
着構造の場合、融着部となるパイプ内層部にはカーボン
ブラックを含有していないので、たとえ水が融着部に侵
入してこようとも耐塩素水性に優れるという二層パイプ
の特性を十分に発揮し剥離強度低下等の劣化を生じるこ
とがない。
【０００７】
【実施例】以下本発明の実施例を図面を参照して説明す
る。図１は一実施例を示す継手とパイプ部分の断面図、
図２は図１の上面図、図３は他の実施例を示す継手一端
の部分断面図、図４は更に他の実施例を示す継手の断面
図である。図１において、１はポリエチレン樹脂からな
る継手本体でソケット形の継手を示す。本体の両端には
接続しようとするパイプの内面に差し込めるだけの外径
を有する差口部４ａ，４ｂが形成されている。差口部４
ａ，４ｂの外面には、樹脂で被覆した電熱線２ａ，２ｂ
が設けられているが、ここで電熱線２ａと２ｂはそれぞ
れ独立した配線形態をとっている。即ち２ａの電熱線の
両端は一対のコネクタピン３ａにそれぞれ接続できるよ
うに予め電熱線を２条巻きとして差口部４ａに巻いてい
る。２ｂの電熱線とコネクタピン３ｂも同様としてい
る。そして一対のコネクタピン３ａ，３ｂの内一方のピ
ン同士を端子35で接続し一本の電熱線としている。また
コネクタピン３ａと３ｂは継手本体内に埋設するように
しても良いが、パイプ融着後はコネクタピン自体必要と
なくなるので、図３のように本体上部に形成した溝内に
納まるように放置した状態としても良い。
【０００８】５はカーボンブラックを配合しない内層51
と、カーボンブラックを配合した外層52とからなる二層
パイプである。このパイプはポリエチレンとしたが、ポ
リブデンであっても構わない。尚、この時継手本体もポ
リブデン製としても良い。以上のように構成された電気
融着継手１は、例えば図１に示すように二層パイプ５を
差口部４ａ，４ｂにそれぞれ突き当たるまで差込み、そ
の後コネクタピン31，33を介して電熱線２ａ，２ｂへ電
流を供給し、加熱融着が行われる。通電時間の制御は、
例えば接続しようとするパイプの口径毎に予め決められ
た適切な通電時間をもとに行う方法がある。
【０００９】図３に示す本発明の他の実施例は、継手本
体１の差口部の端からステンレスなどからなるスティフ
ナー部材８を嵌着したものである。このように電熱線が
設けられた差口部の内面側に剛性を持たせたので、融着
時、溶融樹脂の膨脹圧力が内面側に逃げることがなく、
外面側に積極的に溶融が進行するのでより強固な融着接
合を得ることができる。なお上記スティフナー部材８
は、継手本体１の内面全体に設けても良い。また、ガラ
ス繊維等で強化したプラスチックを用いても良い。
【００１０】図４は更に他の実施例で差口部を適宜傾斜
面に形成している。この傾斜面の角度は右側に示す二層
パイプの場合３°〜７°程度が好ましく、パイプ側の内
面53もこれにほぼ一致するようにテーパ状に削り取って
いる。また左側に示すようにパイプ６自身の内径54を治
具等によって拡径して押込んで装着することも考えられ
る。
【００１１】図５，図６も別の実施例を示しており、従
来からあるヒートフュージョン継手と接続するのに用い
た例である。ヒートフュージョン継手60はアイテム数や
口径サイズが豊富にそろっているので、パイプと接続す
る場も多いのでこのような時に便利である。図では両端
差口構造としたが、パイプ側は受口構造であってもよ
い。また図６はヒートフュージョン継手61とフランジ付
のヒートフュージョン継手62を接続する例を示した。
【００１２】本発明の電気融着継手は、差口部を有して
いるので接続できるパイプは少なくとも内面が熱可塑性
樹脂であれば種類を問わないが、水用として使用される
場合は内層部分にカーボンブラックを含有しないパイプ
であることが望ましい。尚上記した継手の形状は、エル
ボ、チーズ、レジューサ、クロス、ヘッダ等の配管形態
に合わせて種々変更することができる。
【００１３】
【発明の効果】本発明の電気融着継手は、差口部が形成
されているので、継手本体の差口部の外面とパイプの内
面との融着接合が可能となった。そして特に耐候性及び
耐塩素水性に優れた二層パイプを接合する場合、そのパ
イプの特性をそこなうことなく電気融着接合が行える。
【図面の簡単な説明】
【図１】 本発明の一実施例を示す、電気融着継手と接
続しようとするパイプの断面図である。
【図２】 図１の継手本体部分の上面図である。
【図３】 本発明の他の実施例を示す、継手本体端部の
一部断面図である。
【図４】 本発明の更に他の実施例を示し、差口部がテ
ーパになった継手本体を示す半断面図である。
【図５】 同じく他の実施例を示し、ヒートフュージョ
ン継手とパイプの接続を示す断面図である。
【図６】 同じく他の実施例を示し、ヒートフュージョ
ン同士の接続を示す図である。
【図７】 従来の電気融着継手とパイプの融着前及び融
着後の状態を示す断面図である。
【符号の説明】
１…継手本体 ２ａ，２ｂ…樹脂被覆した電熱線 ３ａ，３ｂ…コネクタピン ４ａ，４ｂ…差口部 ５…二層パイプ 51…内層 52…外層

Claims (2)

    【特許請求の範囲】
  1. 【請求項１】 少なくとも内面が熱可塑性樹脂からなる
    パイプを接続する為の継手であって、熱可塑性樹脂から
    なり、前記パイプの内面に差し込む差口を少なくとも１
    つ備えると共に、該差口の外面に電熱線を設けたことを
    特徴とする電気融着継手。
  2. 【請求項２】 請求項１記載の継手において、継手本体
    の内面にステンレス、青銅等、耐食性を有する金属部
    材、あるいは、ガラス繊維等で強化したプラスチック部
    材を設けたことを特徴とする電気融着継手。
JP5053951A 1993-03-15 1993-03-15 電気融着継手 Pending JPH06265082A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5053951A JPH06265082A (ja) 1993-03-15 1993-03-15 電気融着継手

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5053951A JPH06265082A (ja) 1993-03-15 1993-03-15 電気融着継手

Publications (1)

Publication Number Publication Date
JPH06265082A true JPH06265082A (ja) 1994-09-20

Family

ID=12957034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5053951A Pending JPH06265082A (ja) 1993-03-15 1993-03-15 電気融着継手

Country Status (1)

Country Link
JP (1) JPH06265082A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722824A3 (en) * 1995-01-23 1999-03-24 BG plc Fitting & pipe joint using it
US6722708B2 (en) 2001-08-09 2004-04-20 Nissan Motor Co., Ltd. Tubular resin connection structure
FR2853861A1 (fr) * 2003-04-15 2004-10-22 Volkswagen Ag Systeme de reservoir de carburant et procede de fabrication d'un systeme de reservoir de carburant
WO2005105411A1 (de) * 2004-04-29 2005-11-10 Friatec Aktiengesellschaft Vorrichtung zum verbinden von bauteilen aus schmelzbarem kunststoff
JP2012172688A (ja) * 2011-02-17 2012-09-10 Sekisui Chem Co Ltd 複合管の接続構造及び複合管の接続方法
WO2013013664A3 (de) * 2011-07-27 2013-05-30 Friatec Aktiengesellschaft Verbundkomponenten-koppelsystem und verfahren
JP2015034594A (ja) * 2013-08-08 2015-02-19 積水化学工業株式会社 管継手及び配管構造の施工方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722824A3 (en) * 1995-01-23 1999-03-24 BG plc Fitting & pipe joint using it
US6722708B2 (en) 2001-08-09 2004-04-20 Nissan Motor Co., Ltd. Tubular resin connection structure
FR2853861A1 (fr) * 2003-04-15 2004-10-22 Volkswagen Ag Systeme de reservoir de carburant et procede de fabrication d'un systeme de reservoir de carburant
WO2005105411A1 (de) * 2004-04-29 2005-11-10 Friatec Aktiengesellschaft Vorrichtung zum verbinden von bauteilen aus schmelzbarem kunststoff
JP2012172688A (ja) * 2011-02-17 2012-09-10 Sekisui Chem Co Ltd 複合管の接続構造及び複合管の接続方法
WO2013013664A3 (de) * 2011-07-27 2013-05-30 Friatec Aktiengesellschaft Verbundkomponenten-koppelsystem und verfahren
JP2015034594A (ja) * 2013-08-08 2015-02-19 積水化学工業株式会社 管継手及び配管構造の施工方法

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