CH400687A - Connection sleeve for welding plastic pipes - Google Patents

Connection sleeve for welding plastic pipes

Info

Publication number
CH400687A
CH400687A CH46763A CH46763A CH400687A CH 400687 A CH400687 A CH 400687A CH 46763 A CH46763 A CH 46763A CH 46763 A CH46763 A CH 46763A CH 400687 A CH400687 A CH 400687A
Authority
CH
Switzerland
Prior art keywords
plastic pipes
connection sleeve
welding plastic
welding
heating conductor
Prior art date
Application number
CH46763A
Other languages
German (de)
Inventor
Stuerchler Hans
Weick Heinz
Original Assignee
Keller Hans
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 Keller Hans filed Critical Keller Hans
Priority to CH46763A priority Critical patent/CH400687A/en
Priority to DEK43770U priority patent/DE1871448U/en
Priority to AT143563A priority patent/AT239018B/en
Publication of CH400687A publication Critical patent/CH400687A/en

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"
    • B29C65/3472—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
    • B29C66/01—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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • 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

Landscapes

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

Description

       

      Verbindungsmuffe        zum        Verschweissen    von     Kunststoffrohren       Das Verschweissen     ineinandergreifender    Kunst  stoffkörper aus thermoplastischen     Kunststoffen,    z. B.  Rohren und Rohrverbindern unter Erhitzung     der     Eingriffsflächen der zu verbindenden Formkörper  mittels eines zwischengelegten, elektrisch beheizten  Heizleiters ist bereits bekannt. Es ist des weitem be  kannt, solche Heizleiter in     eine    aus thermoplastischem  Kunststoff bestehende Hülse einzubetten.

   Solche Hül  sen werden als Verbindungsmuffen,     Schweissmuffen,          Schweisshülsen    oder     ähnlich        bezeichnet.        Die    vor  liegende     Erfindung        betrifft    nun eine solche Ver  bindungsmuffe zum Verschweissen von thermo  plastischen Kunststoffrohren, die aus einem thermo  plastischen Material besteht und einen     metallischen,     elektrisch heizbaren     Heizleiter    enthält. Sie ist da  durch     gekennzeichnet,    dass der     Heizleiter    mit einer  elektrisch isolierenden Oxydationsschicht überzogen  ist.  



  Die beiliegenden     Zeichnungen    zeigen ein Aus  führungsbeispiel der Erfindung, und zwar zeigt  die     Fig.1    eine teilweise     geschnittene    Seiten  ansicht zweier zusammengesteckter Rohre vor dem  Verschweissen und  die     Fig.2    die     erfindungsgemässe    Verbindungs  muffe in perspektivischer Darstellung.  



  Das     mit    1 bezeichnete Kunststoffrohr weist an  seinem obern Ende einen erweiterten     Abschnitt    la  auf, in welchen sich ein dem Rohr 1 gleiches Rohr  2 einstecken     l'ässt.    Der obere Abschnitt der Erweite  rung la besitzt eine     Ausdrehung        1b,    in welche die  in der     Fig.2    perspektivisch dargestellte, als Ganzes  mit 3 bezeichnete Verbindungsmuffe eingesetzt ist.  Diese Verbindungsmuffe besteht aus einem thermo  plastischen Kunststoff und enthält einen metallischen,  elektrisch heizbaren Heizleiter 4, der hier die Ge-         stalt    eines     bifilar    gewickelten Drahtes mit zwei An  schlussklemmen 5 hat.

   Dieser Heizleiter ist vorzugs  weise, aber nicht     notwendigerweise,    so angeordnet,  dass er mindestens mit der einen Hülsenfläche     bündig     ist. Er kann aus irgendeinem der für     Heizleiter    be  kannten Metalle oder einer der vielen für     Heizleiter          bekannten    Legierungen, wie z. B. einer     Cr-Ni-Fe-          Legierung    bestehen, die auch Zusätze von Mn, Mo,       Al    u. a. m. enthalten kann. Wichtig ist nun, dass er mit  einer elektrisch isolierenden Oxydationsschicht über  zogen ist, die auf irgendeine an sich     bekannte    Art und  Weise aufgebracht worden ist.  



  Sowohl beim Verschweissen der beiden Rohre 1  und 2 wie auch schon bei der Herstellung der Muffe  3 kann es nämlich     vorkommen,    dass die Win  dungen des Heizleiters 4 sich berühren. Falls der       Heizleiter    nicht mit einer Isolationsschicht versehen  ist, wird dann, wenn sich einzelne     Windungen    be  rühren, die wirksame Länge des Leiters verkürzt und  damit sein Widerstand verringert, so dass beim An  legen der elektrischen Spannung ein zu grosser Strom  fliesst, der eine zu rasche und zu starke Erhitzung  des     Muffenmaterials    bewirkt, so dass nicht mit Sicher  heit eine dichte     Schweissverbindung    erhalten und je  nach dem das     Material    sogar zerstört wird.

   Versuche  haben gezeigt, dass diese Nachteile auch dann auf  treten können, wenn der     Heizleiter    mit einer aus Lack  oder einem Kunststoff bestehenden Isolationsschicht  überzogen ist, da diese sich bei den Temperaturen,  auf die der     Heizleiter    aufgeheizt wird, verändert. Der  erfindungsgemässe Oxydationsüberzug wird jedoch  durch die vorkommenden Temperaturen nicht ver  ändert, so dass keine Gefahr besteht, dass beim An  legen der richtigen elektrischen Spannung eine unvoll  ständige Schweissverbindung zwischen den zu ver  schweissenden Rohren entsteht.



      Connection sleeve for welding plastic pipes The welding of interlocking plastic body made of thermoplastics, z. B. pipes and pipe connectors with heating of the engagement surfaces of the molded body to be connected by means of an interposed, electrically heated heating conductor is already known. It is well known to embed such heating conductors in a sleeve made of thermoplastic material.

   Such sleeves are referred to as connecting sleeves, welding sleeves, welding sleeves or the like. The present invention now relates to such a connection sleeve for welding of thermoplastic plastic pipes, which consists of a thermoplastic material and contains a metallic, electrically heatable heating conductor. It is characterized in that the heating conductor is coated with an electrically insulating oxidation layer.



  The accompanying drawings show an exemplary embodiment of the invention, namely FIG. 1 shows a partially sectioned side view of two pipes plugged together before welding and FIG. 2 shows the connection sleeve according to the invention in a perspective view.



  The plastic pipe denoted by 1 has at its upper end a widened section la, into which a pipe 2 identical to pipe 1 can be inserted. The upper portion of the extension la has a recess 1b into which the connecting sleeve shown in perspective in FIG. 2 and designated as a whole as 3 is inserted. This connecting sleeve consists of a thermoplastic plastic and contains a metallic, electrically heatable heating conductor 4, which here has the shape of a bifilar-wound wire with two connection terminals 5.

   This heating conductor is preferably, but not necessarily, arranged so that it is flush with at least one sleeve surface. It can be made of any of the metals known for heating conductors or one of the many alloys known for heating conductors, such as. B. a Cr-Ni-Fe alloy, which also includes additions of Mn, Mo, Al and. a. m. may contain. It is now important that it is coated with an electrically insulating oxidation layer that has been applied in some known manner.



  Both when welding the two pipes 1 and 2 as well as during the manufacture of the sleeve 3, it can happen that the windings of the heating conductor 4 touch. If the heating conductor is not provided with an insulation layer, the effective length of the conductor is shortened and thus its resistance is reduced when individual turns be touched, so that when the electrical voltage is applied, too high a current flows, the one too fast and causes excessive heating of the sleeve material, so that it is not certain that a tight welded connection is obtained and, depending on which, the material is even destroyed.

   Tests have shown that these disadvantages can also occur when the heating conductor is covered with an insulating layer made of paint or a plastic, since this changes at the temperatures to which the heating conductor is heated. The oxidation coating according to the invention, however, is not changed by the temperatures that occur, so that there is no risk of an incomplete permanent weld connection between the pipes to be welded when applying the correct electrical voltage.

Claims (1)

PATENTANSPRUCH Aus thermoplastischem Material bestehende, einen metallischen, elektrisch heizbaren Heizleiter enthal- tendeVerbindungsmuffe zumVerschweissenvonKunst- stoffrohren, dadurch gekennzeichnet, dass der Heiz- leiter mit einer elektrisch isolierenden Oxydations schicht überzogen ist. PATENT CLAIM, made of thermoplastic material and containing a metallic, electrically heatable heating conductor for welding plastic pipes, characterized in that the heating conductor is covered with an electrically insulating oxidation layer.
CH46763A 1963-01-15 1963-01-15 Connection sleeve for welding plastic pipes CH400687A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH46763A CH400687A (en) 1963-01-15 1963-01-15 Connection sleeve for welding plastic pipes
DEK43770U DE1871448U (en) 1963-01-15 1963-02-25 CONNECTING SLEEVE FOR WELDING PLASTIC PIPES.
AT143563A AT239018B (en) 1963-01-15 1963-02-25 Welding socket connection for thermoplastic plastic pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH46763A CH400687A (en) 1963-01-15 1963-01-15 Connection sleeve for welding plastic pipes

Publications (1)

Publication Number Publication Date
CH400687A true CH400687A (en) 1965-10-15

Family

ID=4187671

Family Applications (1)

Application Number Title Priority Date Filing Date
CH46763A CH400687A (en) 1963-01-15 1963-01-15 Connection sleeve for welding plastic pipes

Country Status (3)

Country Link
AT (1) AT239018B (en)
CH (1) CH400687A (en)
DE (1) DE1871448U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4927183A (en) * 1986-06-25 1990-05-22 Georg Fischer Aktiengesellschaft Adapting piece of thermoplastic material

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH657907A5 (en) * 1982-06-23 1986-09-30 Von Roll Ag SLEEVE MADE OF THERMOPLASTIC MATERIAL FOR CONNECTING PIPE ELEMENTS.
AU569278B2 (en) * 1983-03-09 1988-01-28 Rutland Plastics Ltd. Weldable thermoplastic pipe fitting
US5150922A (en) * 1989-01-11 1992-09-29 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same
DE29521433U1 (en) * 1995-12-19 1997-05-22 Karl-Heinz Krah GmbH Werkzeug- und Vorrichtungsbau, 57520 Schutzbach Pipe or the like Fitting with electrical sleeve
US6250686B1 (en) * 1999-01-25 2001-06-26 Zurn Industries, Inc. Combination mechanical/fusion pipe fitting
US6781099B2 (en) 2001-03-12 2004-08-24 Karl-Heinz Krah Gmbh Electrofusion socket forming system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4927183A (en) * 1986-06-25 1990-05-22 Georg Fischer Aktiengesellschaft Adapting piece of thermoplastic material

Also Published As

Publication number Publication date
AT239018B (en) 1965-03-10
DE1871448U (en) 1963-05-02

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