DD248545A1 - DEVICE FOR MECHANIZED WELDING OF PLASTIC MATERIALS - Google Patents

DEVICE FOR MECHANIZED WELDING OF PLASTIC MATERIALS Download PDF

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Publication number
DD248545A1
DD248545A1 DD86289645A DD28964586A DD248545A1 DD 248545 A1 DD248545 A1 DD 248545A1 DD 86289645 A DD86289645 A DD 86289645A DD 28964586 A DD28964586 A DD 28964586A DD 248545 A1 DD248545 A1 DD 248545A1
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DD
German Democratic Republic
Prior art keywords
chamber
welding
hot air
channels
plastic materials
Prior art date
Application number
DD86289645A
Other languages
German (de)
Inventor
Lothar Jeschke
Hans-Juergen Weise
Guenter Perlich
Original Assignee
Zentralinstitut Schweiss
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Priority to DD86289645A priority Critical patent/DD248545A1/en
Publication of DD248545A1 publication Critical patent/DD248545A1/en

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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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one 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
    • B29C66/01—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
    • B29C66/4344—Joining substantially flat articles for forming fork connections, e.g. for making Y-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
    • B29C66/70—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
    • B29C66/73921—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 characterised by the materials of both parts being thermoplastics

Abstract

Die Erfindung bezieht sich auf eine Vorrichtung zum mechanisierten Schweissen von Plastwerkstoffen. Ziel ist, die Effektivitaet durch eine weitgehende Ausschaltung aufwendiger Nebenzeiten zu erhoehen. Nach der Aufgabe ist das Zufuehren einer solchen heissen Luftmenge zu gewaehrleisten, die ausreichend ist fuer eine Plastifizierung des Zusatzwerkstoffes und gleichzeitigen Erwaermung des Grundwerkstoffes. Kennzeichnend ist ein in seiner Form schlank ausgebildeter Schweisskopf, dessen Fuehrungsrohr in Laengsrichtung ein Dreikammersystem aufweist, bestehend aus Vorwaerm-, Fuell- und Brennkammer, die mit Kanaelen so in Wirkverbindung stehen, dass die aus der Vorwaermkammer austretende erhitzte Heissluft ueber die Kanaele dem im Fuehrungsrohr befindlichen Zusatzdraht umspuelt und in einem plastifizierten Zustand versetzt, und dass ein weiterer Teil der Heissluftmenge von der unmittelbar am Austritt der Fuellkammer angeordneten Brennkammer zur Vermischung mit einem Brenngas aufgenommen wird und ueber eine Gasduese zum Grundwerkstoff stroemt.The invention relates to a device for mechanized welding of plastic materials. The aim is to increase the effectiveness by largely eliminating time-consuming non-productive time. After the task, the supply of such a hot air quantity is to ensure that is sufficient for a plasticization of the filler material and simultaneous warming of the base material. Characteristic is a slender trained in its shape welding head, the Fuehrungsrohr has a three-chamber system, consisting of Vorwaerm-, filling and combustion chamber, which are in operative connection with channels so that the exiting the Vorwaermkammer heated hot air over the channels in the Fuehrungsrohr umspuelt located additional wire and added in a plasticized state, and that a further portion of the hot air quantity is taken from the combustion chamber arranged directly at the outlet of the filling chamber for mixing with a fuel gas and flows through a Gasduese to the base material.

Description

Hierzu 1 Seite ZeichnungFor this 1 page drawing

Anwendungsgebiet der ErfindungField of application of the invention

Die Erfindung betrifft eine Vorrichtung zum mechanisierten Schweißen von Plastwerkstoffen unter Verwendung eines Zusatzwerkstoffes in Form von Profilstäben oder -drähten, insbesondere für den Einsatz in automatischen Plastschweißmaschinen zum Fügen von ebenen Plastmaterial, vorzugsweise zur Herstellung von Stumpf- und Kehlnähten.The invention relates to a device for mechanized welding of plastic materials using a filler material in the form of profiled bars or wires, in particular for use in automatic plastic welding machines for joining flat plastic material, preferably for the production of butt and fillet welds.

Charakteristik der bekannten technischen LösungenCharacteristic of the known technical solutions

Es ist bekannt, daß beim Schweißen von Thermoplasten vorwiegend das Heißgasschweißen eingesetzt wird, wobei man das Zusatzmaterial manuell oder durch eine Vorschubeinheit dem Schweißprozeß zuführt und dabei Grund- und Zusatzwerkstoff gleichzeitig erwärmt. Zur Erzielung einer höheren Schweißgeschwindigkeit wird eine Schweißdüse aufgesetzt, die bewirkt, daß das Zusatzmaterial in einem schnelleren Zeitraum plastiziert wird. Der Wärmeeintrag der durch direkt oder indirekt beheizten Schnellschweißdüse erfolgt durch Wärmekontakt zwischen der Oberfläche des Zusatzwerkstoffes und einem Führungsrohr, welches als Bestandteil der Schnellschweißdüse auf eine Vorwärmtemperatur erwärmt ist. Auf diese Weise wird der Zusatzwerkstoff intensiv erwärmt und kann mit relativ hohen Geschwindigkeiten verschweißt werden. Der Nachteil dieser Schweißeinrichtungen besteht jedoch darin, daß der Zusatzwerkstoff unmittelbar nach dem Schweißprozeß aus der Schweißdüse manuell entfernt werden muß, um eine Überhitzung des Zusatzwerkstoffes zu vermeiden. Die manuelle Handhabung, die zum Entfernen des Zusatzwerkstoffes notwendig ist, bedeutet hohe Nebenzeiten und in für den automatischen Betrieb an Schweißautomaten und Roboter nicht vertretbar.It is known that when welding thermoplastics predominantly the hot gas welding is used, wherein the filler feeds manually or by a feed unit to the welding process while heating base and filler simultaneously. To achieve a higher welding speed, a welding nozzle is placed which causes the additive material to be plasticized in a faster period of time. The heat input of the directly or indirectly heated Schnellschweißdüse is effected by thermal contact between the surface of the filler material and a guide tube, which is heated as part of the Schnellschweißdüse to a preheating temperature. In this way, the filler material is heated intensively and can be welded at relatively high speeds. The disadvantage of these welding devices, however, is that the filler material must be removed manually immediately after the welding process from the welding nozzle in order to avoid overheating of the filler material. The manual handling, which is necessary for removing the filler material, means high non-productive times and in unacceptable for the automatic operation of welding machines and robots.

Es ist weiterhin bekannt, daß mittels der Extrudertechnik Handschweißgeräte entwickelt wurden, bei denen das Zusatzmaterial im Extruder vollständig plastiziert wird und anschließend in die Schweißfuge fließt, wobei eine unmittelbar an der Zusatzmaterialaustrittsdüse angeordnete Strahlerlampe den Grundwerkstoff erwärmt. Der Nachteil dieses Schweißsystems liegt im Erschmelzungsbereich des Zusatzwerkstoffes im Extruder.It is also known that by means of extruder manual welding equipment have been developed in which the additive material is completely plasticized in the extruder and then flows into the weld joint, wherein a directly arranged on the Zusatzmaterialaustrittsdüse radiator lamp heats the base material. The disadvantage of this welding system lies in the melting of the filler material in the extruder.

Bei Stillstand des Extruders, der bei Nahtanfang und -ende und bei Wechsel des Werkstücks ausgeschalten werden muß, sinkt die Schmelztemperatur des Granulats im Extruder so weit, daß bei Inbetriebnahme des Gerätes wieder hohe Anlauf- bzw. Erwärmungszeiten notwendig sind. Diese Geräte der Extrudertechnik werden deshalb nur für Montagearbeiten eingesetzt und sind für ein Einsatz in Schweißautomaten und Robotern nicht geeignet.At standstill of the extruder, which must be turned off at the beginning and end of the seam and when changing the workpiece, the melting temperature of the granules in the extruder drops so much that when starting the device again high start-up or heating times are necessary. These extruder technology devices are therefore only used for assembly work and are not suitable for use in welding machines and robots.

Lösungen, welche es gestatten, das mittels einer Schweißkopfeinheit ein kontinuierliches Schweißen im Roboter- bzw. Automatenbetrieb ermöglicht, wurde bisher nicht bekannt.Solutions which allow a continuous welding in robot or automatic mode by means of a welding head unit have not been known hitherto.

Ziel der ErfindungObject of the invention

Durch die Erfindung ist die Effektivität beim mechanisierten Schweißen von Plastwerkstoffen durch eine weitgehende Ausschaltung aufwendiger Nebenzeiten zu erhöhen.By the invention, the effectiveness in the mechanized welding of plastic materials is to be increased by a substantial elimination of complex non-productive times.

Das Wesen der ErfindungThe essence of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum mechanisierten Schweißen von Plastwerkstoffen zu entwickeln, wobei Maßnahmen vorzusehen sind, die das Zuführen einer solchen heißen Luftmenge gewährleisten, die ausreichend ist für eine Plastifizierung des Zusatzwerkstoffes und gleichzeitigen Erwärmung des Grundwerkstoffes.The invention has for its object to develop a device for mechanized welding of plastic materials, measures being provided to ensure the supply of such a hot air quantity, which is sufficient for a plasticization of the filler material and simultaneous heating of the base material.

Die Aufgabe der Erfindung wird mit einer Vorrichtung gelöst, bei der erfindungsgemäß ein in seiner Form schlank ausgebildeter Schweißkopf angeordnet ist, dessen Führungsrohr in Längsrichtung ein Dreikammersystem aufweist, bestehend aus Vorwärm-, Füll-The object of the invention is achieved with a device in which, according to the invention, a slim-shaped welding head is arranged, whose guide tube has a three-chamber system in the longitudinal direction, consisting of preheating, filling

und Brennkammer, die mit Kanälen so in Wirkverbindung stehen, daß die aus Vorwärmkammer austretende, erhitzte Heißluft über Kanäle des Zusatzwerkstoff umspült und in einen plastifizierten Zustand versetzt, und daß ein weiterer Teil der Heißluftmenge von der unmittelbar am Austritt der Füllkammer angeordneten Brennkammer zur Vermischung mit einem Brenngas aufgenommen wird und über eine mit der Brennkammer fest verbundenen Gasdüse zum Grundwerkstoff strömt.and combustion chamber, which are in operative connection with channels in such a way that the heated hot air emerging from the preheating chamber flows around channels of the filler material and into a plasticized state, and that a further portion of the hot air quantity is mixed with the combustion chamber arranged directly at the outlet of the filling chamber a fuel gas is received and flows through a fixedly connected to the combustion chamber gas nozzle to the base material.

Die Vorwärmkammer ist zur Erwärmung der durchströmenden Luft mit einer Wärmequelle in Form zweier Halogenstrahler ausgestattet. Gegenstand der Erfindung ist somit eine Vorrichtung, bei welcher der Zusatzwerkstoff durch ein Führungsrohr und Wärmekammer transportiert wird und durch einen mit aus einer Lichtquelle entstandenen Wärmestrom umspült und plastiziert werden kann. Am Austritt der Wärmekammer ist eine mit Propan oder Stadtgas betriebene Brenngasdüse angeschlossen, die zur Erwärmung des Grundwerkstoffes die benötigte Wärmemenge liefert, wobei der vorgewärmte Heißluftstrom aus der Wärmekammer die Brenngasdüse so intensiv umspült, daß der Gasverbrennungsprozeß durch die Sauerstoffzufuhr gewährleistet wird. Bei notwendigen Unterbrechungen des Schweißprozesses, die zangsläufig bei Schweißanfang und -ende auftreten, wird die als Wärmequelle dienende Lichtquelle ausgeschaltet, die Wärmezufuhr wird somit unterbrochen und damit ein Überhitzen des Zusatzmaterials vermieden.The preheating chamber is equipped to heat the air flowing through with a heat source in the form of two halogen lamps. The invention thus relates to a device in which the filler material is transported through a guide tube and heat chamber and can be washed around by a with a resulting from a light source of heat flow and plasticized. At the outlet of the heat chamber operated with propane or town gas fuel gas nozzle is connected, which supplies the required amount of heat to heat the base material, the preheated hot air flow from the heat chamber so thoroughly surrounds the fuel gas that the gas combustion process is ensured by the supply of oxygen. When necessary interruptions of the welding process, which zangsläuf occur at the beginning and end of welding, serving as a heat source light source is turned off, the heat supply is thus interrupted, thus avoiding overheating of the additional material.

Ausführungsbeispielembodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel mit der dazugehörigen Zeichnung näher erläutert werden, die in einer Schnittdarstellung die Vorrichtung während des Schweißprozesses zeigt.The invention will be explained in more detail below with reference to an embodiment with the accompanying drawing, which shows the device during the welding process in a sectional view.

Mit Hilfe der Vorrichtung, in welcher sich das Erwärmungs- bzw. Plastifizierungssystem für den Zusatzwerkstoff 3 und Grundwerkstoff 14 befindet, wird ein tafelförmiger Thermoplastwerkstoff 14 mittels Heißluft verschweißt. Dazu besitzt das Führungsrohr 5 in Längsrichtung ein Dreikammersystem, bestehend aus Vorwärm-, Füll- und Brennkammer (6; 15; 11). Ein Motor 1 mit Getriebe treibt die Vorschubrollen 2 an und transportiert den Zusatzwerkstoff 3 in Richtung 4 durch das Führungsrohr 5. In der Vorwärmkammer 6 befinden sich zwei Halogenstrahler 7, die durch den Kanal 8 mit Luft unter einem Druck von 300 mm WS umspült werden.With the aid of the device in which the heating or plasticizing system for the filler material 3 and base material 14 is located, a tabular thermoplastic material 14 is welded by means of hot air. For this purpose, the guide tube 5 has in the longitudinal direction of a three-chamber system, consisting of preheating, filling and combustion chamber (6; 15; 11). A motor 1 with gear drives the feed rollers 2 and transports the filler material 3 in the direction 4 through the guide tube 5. In the preheating chamber 6 are two halogen lamps 7, which are lapped by the channel 8 with air under a pressure of 300 mm WS.

Die in ihrer elektrischen Leistung regelbaren Halogenstrahler 7 erhitzen die umlaufende Luftmenge auf eine Temperatur von 1000C, anschließend strömt die Heißluft über den Kanal 9 in die Füllkammer 15. Ein Teil der Heißluftmenge dringt durch die Kanäle 10 zum Zusatzwe'rkstoff 3 und umspült diesen so lange, bis eine Vorplastizierung stattgefunden hat und ein kontinuierliches Zuführen im Verhinderungsbereich des tafelförmigen Thermoplastwerkstoffes 14 stattfinden kann.The controllable in their electrical power halogen lamps 7 heat the circulating air flow to a temperature of 100 0 C, then the hot air flows through the channel 9 in the filling chamber 15. Part of the hot air quantity penetrates through the channels 10 to Zusatzwe'rkstoff 3 and flows around it until preplasticization has taken place and continuous feeding can take place in the prevention region of the tabular thermoplastic material 14.

Der weitere Teil der Heißluftmenge strömt in den Brennraum 11, in den durch eine Düse 12, mit einem Bohrungsdurchmesser von 0,5 mm ein Propan-Bren'ngas mit einem Druck von 300 mm WS einströmt, so daß für den Verbrennungsvorgang der benötigte Sauerstoff vorliegt. Das Heißgas strömt dann durch eine Heißgasdüse 16 zum Grundwerkstoff 14 mit einer Temperatur von 4000C und plastiziert somit den Grundwerkstoff 14 und teilweise auch den Zusatzwerkstoff 3.The further part of the amount of hot air flows into the combustion chamber 11, in which a propane Bren'ngas flows through a nozzle 12, with a bore diameter of 0.5 mm at a pressure of 300 mm WS, so that there is the required oxygen for the combustion process , The hot gas then flows through a hot gas nozzle 16 to the base material 14 at a temperature of 400 0 C and thus plasticized the base material 14 and partially also the filler material. 3

Nach Beendigung des Schweißvorganges wird der Motor 1 mit Getriebe und die Halogenstrahler 7 mittels Schalter 17 und 18 gleichzeitig abgeschaltet und somit eine Überhitzung des Zusatzwerkstoffes 3 im Führungsrohr 5 vermieden.After completion of the welding process, the engine 1 with gearbox and the halogen lamps 7 is switched off at the same time by means of switches 17 and 18, thus avoiding overheating of the filler material 3 in the guide tube 5.

Claims (2)

1. Vorrichtung zum mechanisierten Schweißen von Plastwerkstoffen unter Verwendung eines Zusatzwerkstoffes in Form von Profilstäben oder -drähten, insbesondere für den Einsatz in automatischen Plastschweißmaschinen zum Fügen von ebenem Thermoplasttafelmaterial, vorzugsweise zur Herstellung von Stumpf- und Kehlnähten, gekennzeichnet dadurch, daß ein in seiner Form schlank ausgebildeter Schweißkopf angeordnet ist, dessen Führungsrohr (5) in Längsrichtung ein Dreikammersystem aufweist, bestehend aus Vorwärm-, Füll- und Brennkammer (6; 15; 11), die mit den Kanälen (8; 9; 10) so in Wirkverbindung stehen, daß die aus der Vorwärmkammer (6) austretende, erhitzte Heißluft über die Kanäle (9; 10) den im Führungsrohr (5) befindlichen Zusatzwerkstoff (3) umspült und in einer plastifizierten Zustand versetzt, und daß ein weiterer Teil der Heißluftmenge von der unmittelbar am Austritt der Füllkammer (13) angeordneten Brennkammer (11) zur Vermischung mit einem Brenngas aufgenommen wird und über eine Gasdüse (16) zum Grundwerkstoff (14) strömt.1. An apparatus for mechanized welding of plastic materials using a filler material in the form of profiled bars or wires, in particular for use in automatic plastic welding machines for joining flat thermoplastic sheet material, preferably for the production of butt and fillet welds, characterized in that a in its shape slender trained welding head is arranged, whose guide tube (5) has a three-chamber system in the longitudinal direction, consisting of preheating, filling and combustion chamber (6; 15; 11), which are in operative connection with the channels (8; 9; that the heated hot air emerging from the preheating chamber (6) flows through the channels (9; 10) around the filler material (3) located in the guide tube (5) and is put into a plasticized state, and that a further part of the hot air quantity is transferred from the directly on Outlet of the filling chamber (13) arranged combustion chamber (11) aufgenom for mixing with a fuel gas men and flows through a gas nozzle (16) to the base material (14). 2. Vorrichtung zum mechanisierten Schweißen von Plastwerkstoffen nach Punkt 1, gekennzeichnet dadurch, daß die Vorwärmkammer (6) zur Erwärmung der durchströmenden Luft mit einer Wärmequelle in Form zweier Halogenstrahler (7) ausgestattet ist.2. Apparatus for mechanized welding of plastic materials according to item 1, characterized in that the preheating chamber (6) is provided for heating the air flowing through with a heat source in the form of two halogen lamps (7).
DD86289645A 1986-04-28 1986-04-28 DEVICE FOR MECHANIZED WELDING OF PLASTIC MATERIALS DD248545A1 (en)

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DD86289645A DD248545A1 (en) 1986-04-28 1986-04-28 DEVICE FOR MECHANIZED WELDING OF PLASTIC MATERIALS

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DD86289645A DD248545A1 (en) 1986-04-28 1986-04-28 DEVICE FOR MECHANIZED WELDING OF PLASTIC MATERIALS

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716192C2 (en) * 1997-04-18 2002-12-05 Kunststoff Zentrum Leipzig Welding wire preheating device for hot gas welding devices
EP1935617A1 (en) * 2006-12-18 2008-06-25 Leo Martinez Heat welding nozzle for sealing flooring seams

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716192C2 (en) * 1997-04-18 2002-12-05 Kunststoff Zentrum Leipzig Welding wire preheating device for hot gas welding devices
EP1935617A1 (en) * 2006-12-18 2008-06-25 Leo Martinez Heat welding nozzle for sealing flooring seams

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