EP0446314A1 - Schweissmuffe und ein verfahren zu deren herstellung - Google Patents

Schweissmuffe und ein verfahren zu deren herstellung

Info

Publication number
EP0446314A1
EP0446314A1 EP90912857A EP90912857A EP0446314A1 EP 0446314 A1 EP0446314 A1 EP 0446314A1 EP 90912857 A EP90912857 A EP 90912857A EP 90912857 A EP90912857 A EP 90912857A EP 0446314 A1 EP0446314 A1 EP 0446314A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
sleeve body
welding
thermoplastic material
reinforcing layer
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.)
Withdrawn
Application number
EP90912857A
Other languages
German (de)
English (en)
French (fr)
Inventor
Thomas Strauch
Alfred Thalmann
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0446314A1 publication Critical patent/EP0446314A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • 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"
    • B29C65/3472—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
    • 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
    • B29C66/50—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
    • B29C66/50—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
    • 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"
    • B29C65/3468—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
    • 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
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic

Definitions

  • the present invention relates to a welding sleeve according to the preamble of claim 1 and a method for producing a welding sleeve.
  • Welding sleeves of the type mentioned are used in particular for connecting pipes.
  • a welding sleeve for pipes made of a thermoplastic and / or weldable material has become known from European application EP-0222 287, with a heating wire arranged on an inner surface, which is wound into a heating coil and to which current can be supplied for welding.
  • a reinforcement in the form of a winding inserted in a groove or in the form of a tubular part is arranged on the outer surface of the welding sleeve, the thermal expansion coefficient of the reinforcement being smaller than that of the sleeve body.
  • the object of the present invention to propose a welding sleeve of the type mentioned in the introduction, in which the sleeve is permanently stiff with little use of material, so that it is produced during the heating process and the welding process in order to generate the required welding pressure as well as after the pipe connection has been created to accommodate the media pressure.
  • the welding sleeve should not be susceptible to corrosion and should be able to be produced by a simple, automatic process.
  • Fig. 1 shows a longitudinal section of an embodiment of the welding sleeve.
  • Fig. 2 shows a variant of the welding sleeve shown in Fig. 1.
  • sleeve body 1 consisting of a thermoplastic material such as polyethylene, on the inner surface 2 of which in a known manner a heating wire winding 3 is arranged and which, for example connecting wires 4 or
  • a reinforcing layer 6 is arranged on the outer surface 5 of the sleeve body 1 and has a higher strength than the sleeve body 1.
  • the reinforcing layer is preferably connected to the sleeve body by a material connection.
  • the sleeve body is produced as a molded body in the injection molding process or as a pipe section in the extrusion process from a crosslinkable material which has an outer dimension including the reinforcing layer.
  • the reinforcing layer is then produced by a crosslinking reaction, it being possible to use a chemical and / or physical crosslinking process for the reinforcing effect on a determinable layer on the outer circumference of the sleeve body.
  • This crosslinking reaction can be brought about, for example, by means of silane crosslinking, by means of peroxidic crosslinking, by means of electron beam crosslinking or by means of UV radiation.
  • a cross-linking reaction is basically a hardening process that is irreversible. This means that this harder or firmer layer produced by crosslinking is not plasticized again due to the heat generated by the heating wire.
  • the reinforcing layer 6 thus counteracts the radial evasion of the sleeve material during the welding process.
  • the thermoplastic material used for the sleeve body is not suitable for good stiffening by crosslinking, a compound sleeve body can be produced from two different thermoplastic materials, the material which can be easily crosslinked being arranged cohesively on the outer circumference in a required layer thickness at the manufacturer of the sleeve body is. This production can be carried out by co-injection in an injection molded body, by co-extrusion in a pipe section or by inserting a corresponding part into the injection mold.
  • this can consist of a thermoplastic material reinforced with glass or carbon fiber.
  • This reinforcing layer 6 which has a higher rigidity than the sleeve body, is produced during the manufacture of the sleeve body by co-injection or by inserting a part into the injection mold and is then integrally connected to the sleeve body.
  • a socket body which is a pipe section, the production is carried out by the co-extraction process.
  • FIG. 2 shows a different arrangement of the reinforcement layer 6 in the sleeve body 1 than in FIG. 1. This is integrated in the outer area of the sleeve body 1 and is preferably enclosed on all sides by the thermoplastic material of the sleeve body 1 according to FIG. 2, above.
  • the sleeve body 1 is preferably an injection molded part, the reinforcement layer 6 being inserted as a tubular part 7 into the injection mold when the sleeve body is produced.
  • This tubular part can consist of a plastic reinforced with glass or carbon fibers or of another solid material, such as metal. Corrosion is ruled out due to the complete covering by the thermoplastic material. 2, below, the glass or carbon fiber is reinforced
  • Layer 6 is arranged inside the sleeve body 1 consisting of a pipe section, the production being carried out by co-extrusion.
  • the welding sleeves described above are preferably used to connect pipes with larger diameters and ensure through the integrated, higher rigidity reinforcement layer with low material use, d the build-up of a welding pressure required for a good weld connection, as well as the sufficient strength during the operating period to accommodate the occurring Stresses due to the medium pressure and external influences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Laminated Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Ropes Or Cables (AREA)
EP90912857A 1989-09-30 1990-09-13 Schweissmuffe und ein verfahren zu deren herstellung Withdrawn EP0446314A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932807A DE3932807C1 (xx) 1989-09-30 1989-09-30
DE3932807 1989-09-30

Publications (1)

Publication Number Publication Date
EP0446314A1 true EP0446314A1 (de) 1991-09-18

Family

ID=6390640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90912857A Withdrawn EP0446314A1 (de) 1989-09-30 1990-09-13 Schweissmuffe und ein verfahren zu deren herstellung

Country Status (15)

Country Link
EP (1) EP0446314A1 (xx)
JP (1) JPH04501986A (xx)
AU (1) AU6279490A (xx)
BR (1) BR9006940A (xx)
CA (1) CA2042367A1 (xx)
CS (1) CS473390A3 (xx)
DE (1) DE3932807C1 (xx)
FI (1) FI912498A0 (xx)
GR (1) GR900100705A (xx)
HU (1) HUT58600A (xx)
NO (1) NO912066L (xx)
PL (1) PL287101A1 (xx)
PT (1) PT95460A (xx)
WO (1) WO1991004845A1 (xx)
YU (1) YU172090A (xx)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203626C2 (de) * 1992-02-08 1993-11-04 Fischer Georg Rohrleitung Schweissmuffe und verfahren zu deren herstellung
DE4307704A1 (de) * 1993-03-11 1994-09-15 Wilhelm Hegler Verfahren zum Verschweißen von aus thermoplastischem Kunststoff bestehenden Rohrstücken
EP0635354A1 (de) * 1993-07-23 1995-01-25 Streng Plastic AG Elektro-Schweissmuffe
WO1997049540A1 (en) * 1996-06-25 1997-12-31 Uponor B.V. Electrofusion fitting
DE19807950A1 (de) * 1998-02-25 1999-09-09 Merle Heizwendelfitting mit Schrumpfmantel
NL1009169C2 (nl) * 1998-05-14 1999-11-16 Polva Pipelife Bv Lasmofverbinding voor hogedrukleiding.
US6406063B1 (en) * 1999-07-16 2002-06-18 Fina Research, S.A. Pipe fittings
WO2005105407A1 (de) * 2004-04-28 2005-11-10 Henry Technologies Gmbh Verfahren zur herstellung einer hochdruck-rohrverbindung
AU2012339552B2 (en) 2011-11-16 2017-02-09 Flexpipe Systems Inc. Connection for a thermoplastic pipe, assembly and method
US9857003B2 (en) 2012-02-17 2018-01-02 Core Linepipe Inc. Pipe, pipe connection and pipeline system
RU2611549C1 (ru) * 2015-10-19 2017-02-28 Закрытое акционерное общество "СМИТ-ГРУПП" Стыковое соединение изолированных труб или фасонных изделий
CN111219559A (zh) * 2019-10-29 2020-06-02 浙江庆发管业科技有限公司 高压油气管道用pe复合电熔管件及其制造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB698488A (en) * 1950-06-09 1953-10-14 Trist & Co Ltd Ronald Improvements relating to oil seals and like packing members
GB829179A (en) * 1957-01-09 1960-02-24 Union Carbide Corp Plastic conduit joint
DE1479231A1 (de) * 1964-11-14 1969-03-27 Furukawa Electric Co Ltd Verfahren zur Verbindung von Plastikroehren
NL6601024A (xx) * 1966-01-27 1967-07-28
DE3540193C1 (de) * 1985-11-13 1987-04-23 Friedrichsfeld Gmbh Elektro-Schweissfitting oder Schweissmuffe
CH671444A5 (xx) * 1986-06-25 1989-08-31 Fischer Ag Georg
FR2606487B1 (fr) * 1986-11-07 1989-03-10 Silix Tubes a base de resine polyolefinique pour la realisation de canalisations, manchons pour leur assemblage et procede pour leur fabrication
GB8805911D0 (en) * 1988-03-12 1988-04-13 Victaulic Plc Process for jointing of polyolefin bodies
US5150922A (en) * 1989-01-11 1992-09-29 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9104845A1 *

Also Published As

Publication number Publication date
JPH04501986A (ja) 1992-04-09
NO912066D0 (no) 1991-05-29
GR900100705A (el) 1992-01-20
WO1991004845A1 (de) 1991-04-18
FI912498A0 (fi) 1991-05-23
CS473390A3 (en) 1992-01-15
PT95460A (pt) 1992-06-30
YU172090A (sh) 1992-09-07
PL287101A1 (en) 1991-06-03
NO912066L (no) 1991-05-29
HU907689D0 (en) 1991-08-28
AU6279490A (en) 1991-04-28
CA2042367A1 (en) 1991-03-31
DE3932807C1 (xx) 1991-05-02
HUT58600A (en) 1992-03-30
BR9006940A (pt) 1991-10-08

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