DE1048106B - Fittings to be connected by welding, in particular fittings, made of thermoplastics - Google Patents

Fittings to be connected by welding, in particular fittings, made of thermoplastics

Info

Publication number
DE1048106B
DE1048106B DES48601A DES0048601A DE1048106B DE 1048106 B DE1048106 B DE 1048106B DE S48601 A DES48601 A DE S48601A DE S0048601 A DES0048601 A DE S0048601A DE 1048106 B DE1048106 B DE 1048106B
Authority
DE
Germany
Prior art keywords
fittings
wire
spraying
welding
pressing
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
DES48601A
Other languages
German (de)
Inventor
Hans Bauer
Dipl-Ing Johannes Von Riegen
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.)
Sud-West-Chemie GmbH
Original Assignee
Sud-West-Chemie GmbH
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 Sud-West-Chemie GmbH filed Critical Sud-West-Chemie GmbH
Priority to DES48601A priority Critical patent/DE1048106B/en
Publication of DE1048106B publication Critical patent/DE1048106B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • 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
    • B29C66/12—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
    • B29C66/50—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
    • 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
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14754—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles being in movable or releasable engagement with the coating, e.g. bearing assemblies
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/261—Moulds having tubular mould cavities

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

Durch Schweißen zu verbindende Formstücke, insbesondere Fittings, aus thermoplastischen Kunststoffen Die Erfindung bezieht sich auf durch Schweißen zu verbindende Form stücke, insbesondere Fittings, aus thermoplastischen Kunststoffen. Fittings to be connected by welding, in particular fittings, made of thermoplastics The invention relates to by welding Pieces to be connected, in particular fittings, made of thermoplastics.

Für das Schweißen von Formstücken aus Polystyrolkunststoffen ist vorgeschlagen worden, zwischen die zu verbindenden Flächen einen Draht einzulegen und ihn mittels eines elektrischen Stromes zu erhitzen, so daß bei Einwirkung von Druck die zu verbindenden Flächen zusammenfließen und die gewünschte Verschweißung unter Einschließen des Heizdrahtes erfolgt. Ein solches Vorgehen ist bei Kantenschweißung möglich, wenn auch wenig vorteilhaft, da das Zwischenlegen des Heizdrahtes zwischen die zu verschweißenden Kanten eine große Sorgfalt erfordert, damit nach dem Verschweißen nicht Teile des Drahtes an der Oberfläche erscheinen; für das Verschweißen von Fittings mit Rohren ist ein solches Verfahren praktisch überhaupt nicht brauchbar. Für das Verschweißen von Rohren aus Kunststoffen ist das Einlegen von Metallbändern oder gewellten Drähten zwischen der äußeren Fläche des Rohres und der inneren Fläche des Fittings, z. B. in eine Innennut des Fittings, vorgeschlagen worden. Diese Art des Vorgehens beschränkt die Erhitzungszone auf eine Zone verhältnismäßig geringer Breite, die der Breite des eingelegten Metallbandes bzw. des gewellten Drahtes entspricht. Dabei wird die Verschweißung ungleichmäßig und etwa linienförmig, so daß sich diese Vorschläge in die Praxis nicht einführen konnten und zu Heizleiterwindungen übergegangen wurde, die eine Verschweißungszone beliebiger Breite gestatten. For welding fittings made of polystyrene plastics has been proposed to insert a wire between the surfaces to be connected and to heat it by means of an electric current, so that when exposed to Pressure the surfaces to be connected flow together and the desired weld takes place with the inclusion of the heating wire. Such a procedure is with edge welding possible, albeit not very advantageous, because the heating wire is placed in between the edges to be welded require great care, so after welding parts of the wire do not appear on the surface; for welding fittings with pipes, such a process is practically useless at all. For the Welding pipes made of plastics is the insertion of metal strips or corrugated wires between the outer surface of the tube and the inner surface of the fitting, e.g. B. in an inner groove of the fitting has been proposed. This kind of the procedure restricts the heating zone to a zone relatively smaller Width that corresponds to the width of the inserted metal strip or the corrugated wire. The weld is uneven and roughly linear, so that this Could not introduce suggestions into practice and switched to heating conductor windings that allow a weld zone of any width.

Es sind Fittings mit eingebetteter Heizleiterwindung bekannt, wobei anzunehmen ist, daß diese Heizleiterwindungen beim Spritzen eingebettet werden. Fittings with an embedded heat conductor turn are known, wherein it can be assumed that these heating conductor windings are embedded during the spraying process.

Solche Fittings weisen den Nachteil auf, daß Quellungen des Materials beim Erhitzen durch Aufheizen des Heizdrahtes behindert werden und frei werdende gasförmige Produkte bei diesen Fittings nicht nach außen gelangen können, so daß die Schweißverbindung unvollkommen ist. Auch die Herstellung solcher Fittings macht Schwierigkeiten, da das Einbetten der Heizwindungen mit geregelten Abständen der einzelnen Windungen voneinander schwierig ist, weil eine Verschiebung der Drahtwindungen gegeneinander beim Spritzen eintritt oder eintreten kann. Such fittings have the disadvantage that swelling of the material are hindered during heating by heating the heating wire and become free gaseous products cannot escape to the outside with these fittings, so that the weld joint is imperfect. The manufacture of such fittings is also important Difficulties, since the embedding of the heating coils at regular intervals of the individual turns from each other is difficult because of a shift in the wire turns occurs or can occur against each other during spraying.

Diese Nachteile werden unter Erreichung von Vorteilen aus der Welt geschafft durch die Formstücke, inshesondere Fittings, der Verbindung mit beim Spritzen eingebetteter Heizleiterwindung und einer zwischen den Windungen des Heizleiters liegender schraubenförmiger Nut, wobei der Abstand der eingebetteten blanken Metalldrähte vorzugsweise gleichmäßig ist; sie sind voneinander getrennt durch die schraubenförmige Nut. These drawbacks are getting benefits out of the world created by the fittings, especially fittings, the connection with during spraying embedded heating conductor turn and one between the turns of the heating conductor lying helical groove, the distance between the embedded bare metal wires is preferably uniform; they are separated from each other by the helical one Groove.

Wird in einem Fitting gemäß der Erfindung ein Rohrende eingesetzt und- der Heizdraht -z. B. durch Anlegen einer elektrischen Spannung erhitzt, so wird zunächst sowohl das Material, in das der Draht eingebettet ist, als auch das des eingesteckten Rohres an dessen Berührungsflächen zum Schmelzen gebracht, wonach sich die Wärme gleichmäßig auf den umgebenden Kunststoff der beiden zu verbindenden Teile überträgt. Die Nut zwischen den Heizdrahtwindungen nimmt die mit der Wärmebehandlung verbundene Quellung des Materials auf und gestattet das Entweichen der hierbei frei werdenden gasförmigen Produkte nach Außen. Die innige Berührung des Heizleiters mit den Flächen der zu verbindenden Teile führt zu einer einwandfreien Verschmelzung der Teile. A pipe end is used in a fitting according to the invention and- the heating wire -z. B. heated by applying an electrical voltage, so First of all, both the material in which the wire is embedded and the of the inserted tube melted at its contact surfaces, after which the heat evenly on the surrounding plastic of the two to be joined Parts transfers. The groove between the heating wire turns decreases with the heat treatment associated swelling of the material and allows the escape of this freely evolving gaseous products to the outside. The intimate touch of the heating conductor with the surfaces of the parts to be connected leads to a perfect fusion Of the parts.

Hergestellt werden die Formstücke und insbesondere Fittings gemäß der Erfindung durch Aufwickeln eines blanken Metalldrahtes auf den die Bohrung des Form stückes formenden Kern des Spritzwerkzeuges, z. B. in bifilarer Anordnung, abwechselnd mit einem später zu entfernden Draht aus einem bei Spritztemperatur nicht schmelzbaren und sich auch mit dem Kunststoff des Formstückes nicht verbindenden Material, z. B. aus duktilen Metallen, wie Kupfer, Aluminium, oder aus Kunststoff, wie Polyamid oder anderen hochschmelzenden polymeren Kunststoffen entsprechender Festigkeit, der gleichzeitig als Abstandhalter zwischen den metallischen Heizdrähten und als formgebender Teil für den zwischen diesen durch Entfernen dieses Drahtes von dem Verschweißen gebildeten Hohlraum in Form einer spiralförmigen Xut dient. The fittings and in particular fittings are manufactured in accordance with of the invention by winding a bare metal wire on the bore of the Form piece forming core of the injection mold, z. B. in a bifilar arrangement, alternating with a wire to be removed later from one at the injection temperature non-meltable and also not connecting with the plastic of the molded piece Material, e.g. B. made of ductile metals such as copper, aluminum, or plastic, such as polyamide or other high-melting polymer plastics Strength that doubles as a spacer between the metallic heating wires and as a shaping part for the one between them by removing this wire formed by the welding cavity in the form of a spiral Xut serves.

Der Abstand der Metalldrahtwindungen voneinander und der Querschnitt der Nut können dabei beliebig gewählt werden, wie es den Anforderungen des Falles entspricht. The distance between the metal wire turns and the cross section the groove can be chosen arbitrarily, as the requirements of the case is equivalent to.

Für das Entweichen von Luft und anderen gasförmigen Stoffen ist dadurch Sorge getragen, daß die Nut bis an das äußere Ende des Formstückes, an dem die Verschmelzung mit dem Rohrende zuletzt erfolgt, durchgeführt ist. This prevents air and other gaseous substances from escaping Care is taken that the groove is up to the outer end of the fitting at which the fusion with the end of the pipe last done.

Die die schraubenförmige Nut zwischen der eingebetteten Heizdrahtwindung beim Spritzen oder Pressen schaffenden Drähte aus wärmebeständigem Material können nach einer anderen Ausführungsform des Verfahrens der Erfindung mit dem Kern vereinigt sein. Nach dieser Ausführungsform wird also ein Kern mit einer schraubenförmigen Nutung verwendet, in die der Draht eingelegt wird. Nach dem Pressen oder Spritzen des Fittings, bei dem der in die Schraubennut des Kernes eingelegte Draht eingebettet wird, wird der Kern herausgedreht. The the helical groove between the embedded heating wire turn When spraying or pressing creating wires made of heat-resistant material can incorporated into the core according to another embodiment of the method of the invention be. According to this embodiment, a core with a helical Groove used in which the wire is inserted. After pressing or spraying of the fitting, in which the wire inserted into the screw groove of the core is embedded the core is unscrewed.

In jedem Fall kann Form und Steigung des Schraubenganges so gewählt werden, daß der Abstand der eingebetteten blanken Drahtwindungen das gewünschte Maß und die Schraubennut zwischen den Drahtwindungen den gewünschten Nutquerschnitt besitzt. In any case, the shape and pitch of the screw thread can be chosen in this way that the distance between the embedded bare wire turns is the desired Measure and the screw groove between the wire turns the desired groove cross-section owns.

Die Zeichnung zeigt bevorzugte Ausführungsformen der Erfindung, und zwar zeigt Fig. 1 im- Querschnitt einen Fitting gemäß der Erfindung (auf der rechten Seite der Zeichnung), während die linke Seite der Zeichnung den Fitting nach der Herstellung und Entfernung vom Kern und vor dem Entfernen des Drahtes aus wärmebeständigem Material zeigt; Fig. 2 zeigt im Querschnitt die Schweißverbindung unter Verwendung des Fittings der Fig. 1 auf der rechten Seite der Zeichnung, während auf der linken Seite der Zeichnung die Vereinigung von Fitting und Rohrende vor dem Erhitzen des eingebetteten metallischen Heizdrahtes dargestellt ist; Fig. 3 zeigt einen Formkern mit aufgewickeltem metallischem Heizdraht und mit aufgewickeltem Draht aus einem wärmebeständigen Material. The drawing shows preferred embodiments of the invention, and Although Fig. 1 shows in cross-section a fitting according to the invention (on the right Side of the drawing), while the left side of the drawing shows the fitting after the Manufacture and removal from the core and before removing the wire from heat-resistant Material shows; Fig. 2 shows in cross section the weld joint in use of the fitting of Fig. 1 on the right side of the drawing, while on the left Side of the drawing shows the union of the fitting and pipe end before heating the embedded metallic heating wire is shown; Fig. 3 shows a mandrel with coiled metallic heating wire and with coiled wire from one heat resistant material.

In den Zeichnungen ist der Draht aus wärmebeständigem Material jeweils mit 1 und der metallische Heizdraht jeweils mit 2 bezeichnet. In the drawings, the wire is made of heat-resistant material, respectively with 1 and the metallic heating wire with 2 in each case.

Als metallischer Heizdraht kann ein bifilar gewickelter Draht verwendet werden, der mit Anschlußhülsen 3 leitend verbunden ist. Nach Entfernen des Drahtes aus wärmebeständigem Material verbleibt eine Nut 4. A bifilar wound wire can be used as the metallic heating wire which is conductively connected to connecting sleeves 3. After removing the wire A groove 4 made of heat-resistant material remains.

PATENTSOCHE: 1. Durch Schweißen zu verbindendes Formstück, insbesondere Fitting, aus thermoplastischem Kunststoff mit beim Spritzen eingebetteter Heizleiterwindung, gekennzeichnet durch eine zwischen den Windungen des Heizleiters liegende schraubenförmige Nut. PATENT SOCHE: 1. Fitting to be connected by welding, in particular Fitting, made of thermoplastic material with heating conductor winding embedded during injection molding, characterized by a helical shape lying between the turns of the heating conductor Groove.

Claims (1)

2. Formstück gemäß Anspruch 1, gekennzeichnet durch einen gleichmäßigen Querschnitt der Nut. 2. Molding according to claim 1, characterized by a uniform Cross section of the groove. 3. Verfahren zur Herstellung eines Formstückes gemäß Anspruch 1 oder 2, gekennzeichnet durch Aufwickeln des metallischen Heizdrahtes unter Mitaufwickeln -eines Drahtes aus wärmebeständigem, sich mit dem Kunststoff beim Spritzen oder Pressen nicht fest verbindenden Stoffes auf den Kern der Spritzform bzw. Preßform. 3. A method for producing a molded piece according to claim 1 or 2, characterized by winding up the metallic heating wire with co-winding -a wire made of heat-resistant, contact with the plastic when spraying or Pressing non-firmly connecting substance onto the core of the injection mold or compression mold. 4. Verfahren zur Herstellung eines Formstückes gemäß Anspruch 1 und 2, gekennzeichnet durch Pressen oder Spritzen des Formstückes in einer Form mit einem mit Gewinde versehenen Kern, auf das der einzuverleibende Heizdraht vor dem Spritzen oder Pressen aufgewickelt wird. 4. A method for producing a molded piece according to claim 1 and 2, characterized by pressing or spraying the shaped piece in a mold with a threaded core onto which the heating wire to be incorporated is attached before the Spraying or pressing is wound up. In Betracht gezogene Druckschriften: USA.-Patentschrift Nr. 2 739 829; Patentschrift Nr. 1 161 des Amtes für Erfindungs-und Patentwesen in der sowjetischen Besatzungszone Deutschlands; Werbeschrift der Fa. Süd-West-Chemie GmbH., Neu-Ulm/Donau, Nr. 2533. References considered: U.S. Patent No. 2,739 829; Patent No. 1 161 of the Office for Invention and Patents in the Soviet Occupation zone of Germany; Advertising leaflet from Süd-West-Chemie GmbH., Neu-Ulm / Donau, No. 2533.
DES48601A 1956-05-03 1956-05-03 Fittings to be connected by welding, in particular fittings, made of thermoplastics Pending DE1048106B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES48601A DE1048106B (en) 1956-05-03 1956-05-03 Fittings to be connected by welding, in particular fittings, made of thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES48601A DE1048106B (en) 1956-05-03 1956-05-03 Fittings to be connected by welding, in particular fittings, made of thermoplastics

Publications (1)

Publication Number Publication Date
DE1048106B true DE1048106B (en) 1958-12-31

Family

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DES48601A Pending DE1048106B (en) 1956-05-03 1956-05-03 Fittings to be connected by welding, in particular fittings, made of thermoplastics

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035958A (en) * 1959-11-05 1962-05-22 Phillips Petroleum Co Method of joining polyethylene pipe
US3062940A (en) * 1958-02-17 1962-11-06 Sud West Chemie G M B H Welding fitting
US3290197A (en) * 1963-03-27 1966-12-06 Robert J Carmody Method of making filament wound plastic containers
DE1554861B1 (en) * 1962-10-30 1971-01-07 Rollmaplast Ag Process for the production of a welding fitting made of thermoplastic material with heating wire windings embedded therein
US4224505A (en) * 1977-06-03 1980-09-23 Von Roll Ag Electrically welding plastic sleeve
FR2503020A1 (en) * 1981-04-02 1982-10-08 Rech Applic Plastiques Et Heating coil inserts for fusing thermoplastic pipe socket joints - preformed so that the concealed wire is adjacent to the interface
EP0086359A2 (en) * 1982-02-11 1983-08-24 Friedrichsfeld GmbH Keramik- und Kunststoffwerke Device for embedding an electrical heating wire in a socket-like plastic object
EP0105068A1 (en) * 1982-10-05 1984-04-11 Societe D'etudes De Recherches Et D'applications Des Plastiques (S.E.R.A.P.) Electrical plastic welding sleeve and method for its manufacture
US4508368A (en) * 1982-03-01 1985-04-02 R & G Sloane Mfg. Co., Inc. Plastic pipe joint
EP0243062A2 (en) * 1986-04-23 1987-10-28 Uponor Bv Heat weldable pipe fittings
EP0255264A2 (en) * 1986-07-26 1988-02-03 Fusion Plastics Limited Electroweldable sockets
EP0260014A2 (en) * 1986-09-09 1988-03-16 Uponor Bv Method of manufacturing heat-weldable thermoplastic fittings
US4852914A (en) * 1987-06-19 1989-08-01 Milfuse Systems, Inc. Plastic pipeline having rapidly fusible joints and method of making same
EP0396273A2 (en) * 1989-05-03 1990-11-07 Fusion Group Plc Electro-fusion fittings
EP0402200A2 (en) * 1989-06-09 1990-12-12 Boulet-D'auria, Terlizzi & Cie Electro-fusion element of conductive plastics material and socket for electro-fusion of plastic parts made therewith
WO1995026873A1 (en) * 1994-03-31 1995-10-12 Glynwed Plastics Ltd. Improvements in or relating to electrofusion couplers
EP0679500A3 (en) * 1994-04-28 1996-10-23 Glynwed Plastics Method of manufacturing an electrofusion coupler.
DE102018130008A1 (en) * 2018-11-27 2020-05-28 Rkt Rodinger Kunststoff-Technik Gmbh Method for producing a plastic part with several wire paths running through the plastic part, tool insert, winding device and system for producing a plastic part with several wire paths running through the plastic part

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1161C (en) * 1877-11-20 H Tietke Butter machine
US2739829A (en) * 1950-08-05 1956-03-27 American Viscose Corp Plastic pipe joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1161C (en) * 1877-11-20 H Tietke Butter machine
US2739829A (en) * 1950-08-05 1956-03-27 American Viscose Corp Plastic pipe joint

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062940A (en) * 1958-02-17 1962-11-06 Sud West Chemie G M B H Welding fitting
US3035958A (en) * 1959-11-05 1962-05-22 Phillips Petroleum Co Method of joining polyethylene pipe
DE1554861B1 (en) * 1962-10-30 1971-01-07 Rollmaplast Ag Process for the production of a welding fitting made of thermoplastic material with heating wire windings embedded therein
US3290197A (en) * 1963-03-27 1966-12-06 Robert J Carmody Method of making filament wound plastic containers
US4224505A (en) * 1977-06-03 1980-09-23 Von Roll Ag Electrically welding plastic sleeve
FR2503020A1 (en) * 1981-04-02 1982-10-08 Rech Applic Plastiques Et Heating coil inserts for fusing thermoplastic pipe socket joints - preformed so that the concealed wire is adjacent to the interface
EP0086359A2 (en) * 1982-02-11 1983-08-24 Friedrichsfeld GmbH Keramik- und Kunststoffwerke Device for embedding an electrical heating wire in a socket-like plastic object
EP0086359A3 (en) * 1982-02-11 1984-11-14 Friedrichsfeld Gmbh Steinzeug- Und Kunststoffwerke Electrical welding sleeve
US4508368A (en) * 1982-03-01 1985-04-02 R & G Sloane Mfg. Co., Inc. Plastic pipe joint
EP0105068A1 (en) * 1982-10-05 1984-04-11 Societe D'etudes De Recherches Et D'applications Des Plastiques (S.E.R.A.P.) Electrical plastic welding sleeve and method for its manufacture
EP0243062A3 (en) * 1986-04-23 1990-03-07 Du Pont (Uk) Limited Heat weldable pipe fittings
EP0243062A2 (en) * 1986-04-23 1987-10-28 Uponor Bv Heat weldable pipe fittings
EP0255264A2 (en) * 1986-07-26 1988-02-03 Fusion Plastics Limited Electroweldable sockets
EP0255264A3 (en) * 1986-07-26 1990-03-21 Fusion Plastics Limited Electroweldable sockets
EP0260014A2 (en) * 1986-09-09 1988-03-16 Uponor Bv Method of manufacturing heat-weldable thermoplastic fittings
EP0260014A3 (en) * 1986-09-09 1990-05-16 Du Pont (Uk) Limited Method of manufacturing heat-weldable thermoplastic fittings
US4852914A (en) * 1987-06-19 1989-08-01 Milfuse Systems, Inc. Plastic pipeline having rapidly fusible joints and method of making same
TR26263A (en) * 1989-05-03 1995-02-15 Fusion Group Plc ELECTRO-FUSION PIPE FITTING.
EP0396273A3 (en) * 1989-05-03 1993-09-08 Fusion Group Plc Electro-fusion fittings
EP0396273A2 (en) * 1989-05-03 1990-11-07 Fusion Group Plc Electro-fusion fittings
EP0402200A2 (en) * 1989-06-09 1990-12-12 Boulet-D'auria, Terlizzi & Cie Electro-fusion element of conductive plastics material and socket for electro-fusion of plastic parts made therewith
FR2648078A1 (en) * 1989-06-09 1990-12-14 Boulet D Auria Terlizzi ELECTROWELDING ELEMENT OF CONDUCTIVE PLASTIC MATERIAL AND ELECTROWELDING FITTING FOR PLASTIC ELEMENTS PRODUCED BY USING THE SAME
US5229581A (en) * 1989-06-09 1993-07-20 Boulet D'auria, Terlizzi Et Cie Electro-welding element of conductive plastic and an electro-welding coupling including said element for interconnecting pieces made of plastic
EP0402200A3 (en) * 1989-06-09 1993-10-06 Boulet-D'auria, Terlizzi & Cie Electro-fusion element of conductive plastics material and socket for electro-fusion of plastic parts made therewith
WO1995026873A1 (en) * 1994-03-31 1995-10-12 Glynwed Plastics Ltd. Improvements in or relating to electrofusion couplers
US5862585A (en) * 1994-03-31 1999-01-26 Glynwed Pipe Systems Limited Electrofusion couplers and method and apparatus for manufacturing
EP0679500A3 (en) * 1994-04-28 1996-10-23 Glynwed Plastics Method of manufacturing an electrofusion coupler.
US5697143A (en) * 1994-04-28 1997-12-16 Glynwed Plastics Ltd. Method of manufacturing an electrofusion coupler
AU689213B2 (en) * 1994-04-28 1998-03-26 Glynwed Pipe Systems Limited Method of manufacturing an electrofusion coupler
DE102018130008A1 (en) * 2018-11-27 2020-05-28 Rkt Rodinger Kunststoff-Technik Gmbh Method for producing a plastic part with several wire paths running through the plastic part, tool insert, winding device and system for producing a plastic part with several wire paths running through the plastic part

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