DE2749202A1 - Thermoplastic web welding appts. - has seam defined by translucent line in platen and supplied with radiant heat from linear heaters staggered about seam - Google Patents

Thermoplastic web welding appts. - has seam defined by translucent line in platen and supplied with radiant heat from linear heaters staggered about seam

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Publication number
DE2749202A1
DE2749202A1 DE19772749202 DE2749202A DE2749202A1 DE 2749202 A1 DE2749202 A1 DE 2749202A1 DE 19772749202 DE19772749202 DE 19772749202 DE 2749202 A DE2749202 A DE 2749202A DE 2749202 A1 DE2749202 A1 DE 2749202A1
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DE
Germany
Prior art keywords
seam
radiators
welding
area
weld
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
DE19772749202
Other languages
German (de)
Inventor
@@ Fritzsche Werner
Werner Prof Gilde
Klaus-Peter Goermann
@@ Schicha Heinz
@@ Steinicke Hans-Eberhardt Dr In
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.)
Zentralinstitut fuer Schweisstechnik der DDR
Original Assignee
Zentralinstitut fuer Schweisstechnik der DDR
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Application filed by Zentralinstitut fuer Schweisstechnik der DDR filed Critical Zentralinstitut fuer Schweisstechnik der DDR
Publication of DE2749202A1 publication Critical patent/DE2749202A1/en
Pending legal-status Critical Current

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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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B29C65/1467—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1496—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of masks
    • 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
    • B29C66/40—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
    • B29C66/40—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
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/70—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Appts. for thermo-welding or deforming thermoplastic webs along rectilinear or curvilinear seams has a platen in whch is formed the seam by a translucent section which is irradiated by linear radiators arranged in a staggered manner on opposite sides of the seam such that the irradiation beams overlap one another. The axes of the radiators are inclined at an angle of 60 degrees w.r.t. each other and the radiators are arranged tangentially at the curved portions of the seams. Used in welding or deforming woven the thermoplastics webs which are difficult weld. Constant, concentrated energy supply to a predetermined zone is warranted.

Description

Vorrichtung zum Schweißen thermoplastischerDevice for welding thermoplastic

iierks tücke Anwendungsgebiet der Erfindung Die Erfindung betrifft eine Vorrichtung zum Schweißen oder Verformen thermoplastischer Werkstücke mit kurvenförmigem und/oder geradlinigem Nahtverlauf mit Nilfe von Wärmestrahlen unter Verwendung eines oder mehrerer Strahler, einer im ochweißnaht- oder Verformungsbereich lichtdurchlassigen Auflagefläche und eines dem Nahtverlauf entsprechenden Druckstempels, insbesondere zum Schweißen oder Verformen thermoplastischer Folien und Platten.The problematic field of application of the invention The invention relates to a device for welding or deforming thermoplastic workpieces with curved and / or a straight seam course with the aid of heat rays using a or several emitters, one in the weld seam or deformation area that is translucent Support surface and a pressure stamp corresponding to the course of the seam, in particular for welding or shaping thermoplastic foils and sheets.

Charakteristik der bekannten technischen Lösungen Es ist bereits bekannt, thermoplastische Werkstoffe, wie Folien oder thermoplastbeschichtete Gewebe mit Hilfe des Heißgas-, Heizelement-, Hochfrequenz-, Wärmeimpuls- und de s @ltras@ ch des Ultraschallschweißverfahrens überlappt zu verbinden.Characteristics of the known technical solutions It is already known thermoplastic materials, such as foils or thermoplastic-coated fabrics Help of the hot gas, heating element, high frequency, heat pulse and de s @ ltras @ ch of the ultrasonic welding process to connect overlapped.

Bei der Anwendung dieser Verfahren treten eine Reihe von Nachteilen auf. Das gilt besonders für das Jleißgasschweißen, welches sich trotz vielfältiger Versuche zur Mechanisierung als äußerst unproduktiv erwies. Aber auch das mechanisierte Heizelementschweißen wird nicht allen Anforderungen der Praxis gerecht. Der Einsatz von mechanisierten Heizkeilschweißmaschinen, bei denen die überlappt zu verschweißenden Folien durch ein Führungs- und Andruckrollenpaer an beiden Selten eines keilförmigen Heizelementes entlang geführt werden, ermöglichte bereits eine wesentliche Steigerung der Schweißgeschwindigkeit. Der wesentliche Nachteil dieses Verfahrens besteht jedoch darin, daß die zu schweißenden Teile durch eine feststehende Einrichtung geführt werden müssen, weshalb besonders beim Schweißen großflächiger Elemente ein zusätzlicher technischer Aufwand für die Führung der zu verbindenden Halbzeuge unumgänglich ist.There are a number of disadvantages when using these methods on. This is especially true for gas welding, which despite being more diverse Attempts at mechanization proved extremely unproductive. But also the mechanized one Heating element welding does not meet all practical requirements. The use of mechanized hot wedge welding machines, where the overlaps to be welded Foils through a pair of guide and pressure rollers on both seldom a wedge-shaped Heating element are guided along, already enabled a significant increase the welding speed. However, the main disadvantage of this method is in that the parts to be welded are guided by a fixed device must be, which is why an additional one, especially when welding large-area elements technical effort for the management of the semi-finished products to be connected is inevitable.

Die Einsatzmöglichkeit des Hochfrequenzschweißens ist, bedingt durch dielektrische Werkstoffeigenschaften auf wenige Thermoplaste beschränkt, wobei zusätzliche Schwierigkeiten durch die dem Thermoplant zugesetzten Füll- und Verbundstoffe entstehen.The possibility of using high-frequency welding is due to dielectric material properties are limited to a few thermoplastics, with additional Difficulties arise from the fillers and composites added to the Thermoplant.

Ebenso wie das Hochfrequenzschweißen ist das irärfteimpulsschweißverfahren ein diskontinuierliches Arbeitsverfahren, welches sowohl in der Nahtlänge Je Arbeitstakt wie auch in der verschweißbaren Werk-3tofidicke einen begrenzten Einsatzbereich besitzt.Just like high-frequency welding, the infrared pulse welding process a discontinuous working process, which both in the seam length depending Work cycle as well as in the weldable factory 3tofi thickness a limited area of application owns.

Es eignet sich ferner nicht zum Schweißen kurvenförmiger Nähte.It is also not suitable for welding curved seams.

Bisher bekannt gewordene Versuche des Ultraschallschweißens lassen erkennen, daß es nicht gelungen ist, längere Nähte mit einem vertretbaren technischen Aufwand herzustellen.So far, attempts at ultrasonic welding have become known Realize that we have not succeeded in making longer seams with a reasonable technical Effort to produce.

Nach der Dl-SS 84 474 ist eine Vorrichtung zum kontinuierlichen Schweißen thermoplastischer Folien bekannt, bei der das Verbinden der Folien auf einer im Bereich der Schweißnaht lichtdurchlässigen Scheibe mittels Lichtstrahlen erfolgt. Die mit dieser Schweißvorrichtung durchgeführten Versuche führten bisher nicht zu dem gewünschten Erfolg, da, bedingt durch die begrenzte lunge der einzusetzenden Strahler, jeweils nur kurze Nahtabschnitte schweißbar sind oder aber eine ungleichmäßige Erwäxtnmung des Nahtbereiches über die gesamte Nahtlänge mit entsprechenden Qualitätsverlusten hinsichtlich der Schweißnahtfestigkeit unvermeidbar ist. Die lösung nach DI,Rß 84 474 ist darüber hinaus nicht zum Schweißen kurvenförmiger Nähte einsetzbar.According to DI-SS 84 474 is a device for continuous welding known thermoplastic films, in which the joining of the films on an im The area of the weld seam of the translucent pane is carried out by means of light rays. The tests carried out with this welding device have not yet led to the desired success, due to the limited lungs of those to be used Radiators, only short seam sections can be welded or an uneven one Growing of the seam area over the entire length of the seam with corresponding loss of quality is unavoidable in terms of weld strength. The solution according to DI, Rß 84 In addition, 474 cannot be used for welding curved seams.

Der besondere Vorteil des Lichtstahlschweißens liegt Jedoch darin, daß mit ihm alle Thermoplaste über einen großen Werks toffdickenbere ich schweißbar sind. Die für dieses Verfahren einsetzbaren Lichtstrahler, vorzugsweise Halogenquarzlampen ergeben je nach Bauweise einen punkt- oder strichförmigen Brennfleck. Die auf dieser Grundlage aufgebauten Strahler sind deshalb kreis- oder bandförmig aufgebaut und besitzen elliptische oder parabolische Reflektoren, Es ist deshalb beim gegenwärtigen Stand der Technik nur möglich, diesen geometrischen Grundformexl - also gradlinig oder punktförmig -entsprechetw(le Schweißverbindungen zu schlffen.However, the particular advantage of light steel welding is that that with it all thermoplastics can be welded over a large material thickness are. The light emitters that can be used for this process, preferably halogen quartz lamps result in a point or line-shaped focal point depending on the design. The one on this Radiators built on the basis are therefore circular or band-shaped and possess elliptical or parabolic reflectors, it is therefore with the present State of the art only possible this geometric Basic formexl - i.e. straight or punctiform - to slacken welded connections accordingly.

Es wäre denkbar, Bandstrslhter in Form bestimmter Kurven IerzusÜellen, wobei jedoch die praktische Anwendung auf einen einzigen Schweißnahtverlauf beschränkt bliebe. Eine derartige ibsung ist, bedingt durch außerordentlich hohe HerstelIungskosten für solche Halogenquarzlampen und dazugehörende Reflektoren, wirtschaftlich nicht vertretbar. Durch die Kurven in der Strahlungsquelle und dem Reflektor würden sich darüber hinaus Reflexionserscheinungen ergeben, welche wieder zur ungleichmäßigen Erwärmung des Nahtverlaufes führen.It would be conceivable to supply strip strips in the form of certain curves, however, the practical application is limited to a single weld seam would stay. Such a solution is due to extremely high manufacturing costs for such halogen quartz lamps and associated reflectors, not economically justifiable. The curves in the radiation source and the reflector would lead to each other In addition, reflection phenomena result, which again lead to uneven Lead to heating of the seam course.

Ziel der Erfindung Es ist Ziel der Erfindung, das Schweißen und Verformen, insbesondere das Abkanten ebener thermoplastischer lIalbzeuge, wie beispielsweise Folien und latten oder thermoplastbeschichtete, an sich nicht schweißbarer Gewebe bei großen Naht längen und beliebigem Nahtverlauf zu ermöglichen.Object of the invention It is the object of the invention to weld and deform, in particular the bending of flat thermoplastic semi-finished products, such as, for example Foils and laths or thermoplastic-coated fabrics that cannot be welded per se to enable large seam lengths and any seam course.

Das Wesen der Erfindung Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Schweißen oder Verformen thermoplastischer Werkstücke mit kurvenförmigen und/oder geradlinigem Nahtverlauf bei Anwendung des Lichtstrahlschweißverfahrens zu entwickeln, welches es gestattet, über den gesamten Nahtverlauf bei begrenzter Wärmeelnflußzone einen konstanten Energieeintrag zu gewährleisten.The essence of the invention The invention is based on the object a device for welding or deforming thermoplastic workpieces with curved and / or a straight seam course when using the light beam welding process to develop, which allows over the entire seam course with limited Heat flow zone to ensure a constant energy input.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die kurvenförmige und/oder geradlinige Naht durch eine aus Bandlichtstrahlern bestehende Strahlergruppe erhitzt wird, welche derart angeordnet ist, daß sich der Strahlungsbereich der einzelnen Bandlichtstrahler überlappt. Die Vberlappung wird erzielt, indem die Bandlichtatrahler in einem Winkel ihrer Strahlermittelacbsen zueinander wechselseitig angeordnet sind, wobei im Bereich der Strahlerüberlappung aie Bef lektoren der Strahler gegeneinander ausgespart werden. Der Neigungswinkel der Strahlermittelachse beträgt zweckmäßigerweise 60°.According to the invention this object is achieved in that the curved and / or straight seam through a group of radiators consisting of ribbon light emitters is heated, which is arranged such that the radiation area of the individual Tape light emitters overlapped. The overlap is achieved by using the tape light emitters are arranged alternately at an angle of their radiator means to each other, whereby in the area of the radiator overlap aie Bef lectors of the radiators against each other be left out. The angle of inclination of the central axis of the radiator is expediently 60 °.

Entsprechend des jeweils vorliegenden Nahtverlaufs wird die Stahlergruppe gegebenenfalls aus unterschiedlich langen und/oder verschiedenförmien St@ahlern zusengesetzt. Im Bereich von Nahtkurven werden die Strahler etwa tangentenartig zum Kurvenverlauf angeordnet, so daß der gesamte Bereich einer Schweißnaht oder ein Verformungsbereich vom wirksamen Stahlungsfeld der aneinandergereihten Strahler erfaßt wird.The Stahler group is based on the respective seam course optionally made of different lengths and / or different shapes of steel added. In the area of seam curves, the emitters become roughly tangent-like arranged to the curve, so that the entire area of a weld or a deformation area from the effective radiation field of the lined-up radiators is detected.

Dabei kann es sich erforderlich machen, daß zur gleichmäßigen Erwärmung der gesamten Nahtfläche die Brennlinie der Strahler in eine ebene außerhalb der Fügeebene verlegt wird. Das bedeutet, daß in diesem Falle die wirksame Erwäraungszone erweitert wird und insbesondere in Kurvenbereichen des Nahtverlaufes eine gleichmäßige Plastifitierung des Nahtbereiches über die gesamte Nahtllnge hinweg erfolgt.It may be necessary that for uniform heating of the entire seam surface the focal line of the radiators in a plane outside the Joining level is moved. This means that in this case the effective heating zone is expanded and especially in curved areas of the seam course a uniform The seam area is plastified over the entire length of the seam.

Neben dr festen Anordnung derartig aufgebauter Strahlergruppen sieht die erfindungsgemäße Ideung weiterhin vor, einzelne oder alle Strahler in einem Winkel zum Kurvenverlauf der Schweißnaht oder des Verformungsbereiches verschieblich anzuordnen, so daß in einem Verschiebungsvorgang der gesamte lichtdurchlässige Bereich der Auflagefläche, also der gesamte Schweißnahtbereich, zu durchstrahlen ist.In addition to the fixed arrangement of these types of radiator groups the idea according to the invention continues to include individual or all radiators in one Angle to the curve of the weld or the Deformation area to be displaceable, so that the entire translucent in one displacement process To irradiate the area of the support surface, i.e. the entire weld seam area is.

Dieses Lösungsmerkmal ist besonders in den Fällen von Bedeutung, in denen beispielsweise durch kleine Kurvenadien der Schweißnaht eine absolute Anpassung der Strahlergruppe an die Nahtgeometrie unmöglich ist.This solution feature is particularly important in cases in to which, for example, an absolute adaptation through small curve radii of the weld seam the emitter group to the seam geometry is impossible.

In besonderen Fällen kann darüber hinaus auf die Verwendung von Faseroptiken zurückgegriffen werden, mit denen die Süahlungsenergie auch engsten Kurven im Schweißnahtverlauf zuzuführen ist.In special cases it can also rely on the use of fiber optics can be used, with which the solar energy even the tightest curves in the weld seam is to be supplied.

Ausführungsbeispiel Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In den dazugehörenden Zeichnungen zeigen: Fig. 1: Einen Querschnitt durch erfindungsgemäße Schweißvorrichtung Fig. 2: Die Strahleranordnung einer kurvenförmig verlaufenden Schweißnaht In der Auflagefläche 5 der Schweißvorrichtung ist eine Quarzglasscheibe 2 eingebettet, welche mit Hilfe eines Abdeckbleches 3 bis auf die gewünschte Geometrie der Schweißnaht 8 lichtundurchlässig abgedeckt ist. Damit ist die, in durch die Strahler inittelachsen 9 der Strahler 1 gerichtete und fokussierte licht- /Wärmestrahlung in einer gemeinsamen Brennlinie 11 wirksam, welche in der Ebene der überlappt liegenden Scllweißtoile 6 liegt. Es erfolgt damit eine Erwärmung der Schweißteile 6 im Bereich der im Abdeckblech 3 vorgesehenen Aussparung in der Breite der Schweißnaht 8, so daß nach dem Abschluß des Erwärmungsvorganges auf Schweißtemperatur ein Fügen der überlappt liegenden Schweißteile 8 mit Hilfe des Druckstempels 7 stattfinden kann.EXEMPLARY EMBODIMENT The invention is intended below using an exemplary embodiment are explained in more detail. The accompanying drawings show: FIG. 1: One Cross section through the welding device according to the invention Fig. 2: The radiator arrangement a curved weld seam in the support surface 5 of the welding device a quartz glass pane 2 is embedded, which with the help of a cover plate 3 Covered so as to be opaque to the desired geometry of the weld seam 8 is. This is the center axis 9 of the radiator 1 directed in through the radiators and focused light / heat radiation effective in a common focal line 11, which lies in the plane of the overlapping Scllweißtoile 6. It takes place in order to a heating of the welding parts 6 in the area of the recess provided in the cover plate 3 in the width of the weld seam 8, so that after the completion of the heating process joining of the overlapping welding parts 8 with the aid of welding temperature of the plunger 7 can take place.

Die von einer gemeinsamen Halterung 4 aufgenommenen Strahler 1, vorzugsweise mit Halogenquarzlampen bestückte Reflektoren elliptischer oder parabolischer Form> sind in ihrer Achsrichtung überlappt angeordnet, weshalb im Uberlappungsbereich die zueinandergewandten Seiten der Ref lektoren mit Aussparungen 10 versehen sind.The radiators 1, which are accommodated by a common holder 4, preferably Elliptical or parabolic reflectors fitted with halogen quartz lamps> are arranged overlapping in their axial direction, which is why in the overlapping area the mutually facing sides of the ref lectors are provided with recesses 10.

Durch die Erprobung der Erfindung konnte ein Windel der Strahlermittelachsen 9 zueinander von 600 als optimale Größe gefunden werden.By testing the invention, a diaper of the radiator center axes 9 to each other out of 600 can be found as the optimal size.

Fig. 2 zeigt einen kurvenförmigen Verlauf der Schweißnaht 8,wobei der Jeweils geradlinige Bereich mit Hilfe der fest angeordneten Strahler 1 erwärmt wird. Der kurvenförmige Abschnitt wird durch einen weiteren Strahler 1 erfaßt, welcher so in die Schweißvorrichtung einbezogen ist, daß sich zunächst die Brennlinie 11 außerhalb des Bereiches der Schweißnaht b befindet und ein mit bekannten Mitteln des Standes der Technik realisiertes Vorschubsystem mit der Vorschubrichtung 12 in einem Verschiebungßvorgang die gesamte Fläche der kurvenförmigen Schweißnsht 8 zu durchstrehlen ermöglicht, wodurch ein lückenloser Wirkungsbereich der Warmeeinflußzone der Strahler 1 iiber den gesamten Verlauf dor Schwelßnaht 8 gesichert tot.Fig. 2 shows a curved course of the weld seam 8, wherein the rectilinear area in each case is heated with the aid of the fixed radiators 1 will. The curved section is detected by a further radiator 1, which is so included in the welding device that the focal line 11 located outside the area of the weld b and a by known means Prior art feed system with feed direction 12 the entire surface of the curved weld seam in one displacement process 8 allows to roam through, creating a gapless area of action of the heat-affected zone the radiator 1 over the entire course of the weld seam 8 secured dead.

Claims (2)

F a t e r t cl r s , I' U C h Vorrichtung zum Schweißen oden Verformen thermopiastischer @erkslücke mit kurvenförmigem und/oder geradlinigem Nahtverlau@ mit Hilfe von Wärmestrah@en unter Verwendung eines oe mehrerer Strahler, einer im Schweißnaht- oder Verformungsbereich lichtdurchlässigen Auflagefläche und eines dem Nahtverlauf entsprechenden Druckstempels, gekennzeichnet dadurch, daß eine aus einzelnen Strahlern (1), vorzugsweise aus Bend iichtstrahlern bestehende Strahlergruppe so angeordnet ist, daß sich der Stahlungsbereich der einzelnen Bandlichtstrahler (1) überlappt, indem die Bandlichtstrahier (1) in einem Winkel der Strablermittelachsen (9), insbesondere von 600 zueinander wechselseitig angeordnct und im Bereich der Strahlerüberlappung die Reflektoren der Bandlichtstrshler (1) gegeneinander ausgespart sind, wobei eine Anzahl, gegebenenfalls unterschiedlich langer und/oder verschiedenförmiger Strahler (1) etwa tangentenartig zum Kurvenverlauf der Schweißnaht (8) oder des Verformungsbereiches ganz oder teilweise fest und/oder in einem Winel zum Kurvenverlauf der Schweißnaht (8) oder des Verformungsbereicbes so verschieblich angeordnet sind, daß der gesamte lichtdurchlässige Bereich der Auflagefläche (5) in einem Verschiebungsvorgung zu durchstrahlen ist. F a t e r t cl r s, I 'U C h Device for welding or deforming thermopiastic gap with curved and / or straight seams with the help of heat rays using one oe of several radiators, one im Weld seam or deformation area translucent support surface and one the pressure stamp corresponding to the seam course, characterized in that one from individual radiators (1), preferably a group of radiators consisting of Bend light radiators is arranged so that the radiation area of the individual ribbon light emitters (1) overlaps by placing the tape light beam (1) at an angle to the central axis of the beam (9), in particular from 600 mutually arranged and in the area of the Overlap the reflectors of the ribbon light beams (1) are cut out against each other are, with a number, optionally of different lengths and / or different shapes Radiator (1) roughly tangent to the curve of the weld (8) or the Deformation area completely or partially fixed and / or in an angle to the curve the weld seam (8) or the deformation area are arranged so that they can be displaced, that the entire translucent area of the support surface (5) in a displacement process is to be irradiated. 2. Vorrichtung zum Schweißen oder Verformen tllermoplastischer Werkstücke mit kurvenförmigem und/oder @r@dlinigem Nahtverlauf mit Hilfe von Wärmes zahlen unter Verwendung eines oder mehreren Srahler nach Punkt 1, gekennzeichnet durch die Verwendung einer zwischen der Strahlungsc@elie und der Ebere der Schwei@scht (8) angeornet Glasfaseroptik.2. Device for welding or deforming thermoplastic workpieces with curvilinear and / or @ r @ linear seam course with the help of Pay heat using one or more emitters according to point 1 by using a sweat between the radiation c @ elie and the boar (8) arranged fiber optic.
DE19772749202 1976-12-03 1977-11-03 Thermoplastic web welding appts. - has seam defined by translucent line in platen and supplied with radiant heat from linear heaters staggered about seam Pending DE2749202A1 (en)

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Application Number Priority Date Filing Date Title
DD7600196101A DD129756A1 (en) 1976-12-03 1976-12-03 DEVICE FOR WELDING THERMOPLASTIC WORKPIECES

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131918A2 (en) * 1983-07-19 1985-01-23 Gebr. Bindler Maschinenfabrik GmbH & Co. KG Device for joining parts of an object together
WO1989010832A1 (en) * 1988-05-13 1989-11-16 Mekrapid Method and device for joining together of thermoplastic materials
WO1997027041A2 (en) * 1996-01-27 1997-07-31 Weidenhammer Packungen Kg Gmbh & Co. Process for production of tubes out of composite cardboard, device for carrying out the process and composite material used therein

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019212904A1 (en) * 2019-08-28 2021-03-04 Contitech Mgw Gmbh Welding device, preferably IR welding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131918A2 (en) * 1983-07-19 1985-01-23 Gebr. Bindler Maschinenfabrik GmbH & Co. KG Device for joining parts of an object together
EP0131918A3 (en) * 1983-07-19 1986-02-12 Gebr. Bindler Maschinenfabrik GmbH & Co. KG Device for joining parts of an object together
WO1989010832A1 (en) * 1988-05-13 1989-11-16 Mekrapid Method and device for joining together of thermoplastic materials
WO1997027041A2 (en) * 1996-01-27 1997-07-31 Weidenhammer Packungen Kg Gmbh & Co. Process for production of tubes out of composite cardboard, device for carrying out the process and composite material used therein
WO1997027041A3 (en) * 1996-01-27 1998-02-26 Weidenhammer Packungen Process for production of tubes out of composite cardboard, device for carrying out the process and composite material used therein

Also Published As

Publication number Publication date
DD129756A1 (en) 1978-02-08

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