DE3238651A1 - Process for making a tight folded-seam joint - Google Patents

Process for making a tight folded-seam joint

Info

Publication number
DE3238651A1
DE3238651A1 DE19823238651 DE3238651A DE3238651A1 DE 3238651 A1 DE3238651 A1 DE 3238651A1 DE 19823238651 DE19823238651 DE 19823238651 DE 3238651 A DE3238651 A DE 3238651A DE 3238651 A1 DE3238651 A1 DE 3238651A1
Authority
DE
Germany
Prior art keywords
heat
folded
heat treatment
seam
adhesive
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.)
Granted
Application number
DE19823238651
Other languages
German (de)
Other versions
DE3238651C2 (en
Inventor
Bernd 3170 Gifhorn Knabe
Klaus 3180 Wolfsburg Könn
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE3238651A priority Critical patent/DE3238651C2/en
Publication of DE3238651A1 publication Critical patent/DE3238651A1/en
Application granted granted Critical
Publication of DE3238651C2 publication Critical patent/DE3238651C2/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • 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"
    • B29C65/36—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" heated by induction
    • B29C65/3604—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" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3608—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" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3612—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" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4835—Heat curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/06—Sealing strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D27/00—Connections between superstructure or understructure sub-units
    • B62D27/02—Connections between superstructure or understructure sub-units rigid
    • B62D27/026—Connections by glue bonding
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
    • 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
    • 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
    • B29C65/1403—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 type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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"
    • B29C65/36—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" heated by induction
    • B29C65/3604—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" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—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" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K2200/06—Macromolecular organic compounds, e.g. prepolymers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Sealing Material Composition (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

A folded-seam joint (3) in whose pocket (5) there has been arranged a heat-curable seam adhesive (6) is efficiently sealed by applying to the open edge (4) of the folded-seam joint a bead (7) of a gellable or curable material and gelling or curing the material by means of two heat treatments, of which the first heat treatment consists in heat supply from the outside, for example in the form of infrared irradiation, and the second heat treatment consists in heat supply from the inside of the metallic parts (1, 2) of the folded-seam joint (3) in the form of inductive heating. This ensures rapid curing without danger of blistering. <IMAGE>

Description

Verfahren zum Herstellen einer dichten Falzverbindung Method for producing a tight fold connection

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1. Es ist bekannt, Kraftfahrzeugteile, wie Türen, Kofferraumhauben, Rückwandklappen und Motorraumhauben beispielsweise aus einem Innen- und einem Außenblech mit einer Falzverbindung herzustellen, in deren Falzspalt ein durch Wärmezufuhr gelier- und/oder härtbarer Bördelnahtkleber, enthaltend beispielsweise PVC-Plastisole, Polyacrylat-Plastisole, Epoxidharze oder Kunstkautschuk, eingebracht ist.The invention relates to a method according to the preamble of the patent claim 1. It is known to motor vehicle parts, such as doors, trunk lids, rear wall flaps and engine compartment hoods, for example, from an inner and an outer sheet with a Produce fold connection, in the fold gap a gelier- and / or through the supply of heat curable flange seam adhesive containing, for example, PVC plastisols, polyacrylate plastisols, Epoxy resins or synthetic rubber, is introduced.

Wie die Erfahrung zeigt, ist es-jedoch außerordentlich schwierig, eine vollständige Ausfüllung des Falzspalts mit dem Kleber zu erzielen. Dies sowie die Tatsache, daß die freiliegende Schnittkante der Falzverbindung bei diesem bekannten Verfahren frei liegt, also nicht versiegelt wird, macht es aus Gründen des Korrosionsschutzes im Falzbereich erforderlich, zusätzliche Dichtmaßnahmen zu treffen. In der DE-OS 28 54 766, F16B 11/00, die nicht exakt eine Falzverbindung betrifft, wird beiderseits einer Raupe aus Klebermaterial eine plastisch verformbare Dichtschnur vorgesehen. Dabei wird aber ebenfalls keine Versiegelung der freiliegenden Schnittkante der Falzverbindung erzielt.However, as experience shows, it is extremely difficult to achieve a complete filling of the rebate gap with the adhesive. This as well the fact that the exposed cutting edge of the folded seam connection is known in this case Procedure is exposed, so is not sealed, makes it for reasons of corrosion protection necessary to take additional sealing measures in the rebate area. In the DE-OS 28 54 766, F16B 11/00, which does not affect exactly one seam connection, is used on both sides a bead of adhesive material is provided with a plastically deformable sealing cord. However, there is also no sealing of the exposed cut edge of the Seam connection achieved.

Der Erfindung liegt mithin die Aufgabe zugrunde, ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1 zu schaffen, das unter Anwendung serienfreundlicher Maßnahmen eine Feinabdichtung des Falzspalts unter Versiegelung der freiliegenden Schnittkante der Falzverbindung gewährleistet Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Patentanspruchs 1, vorteilhafte Ausbildungen dieses Verfahrens beschreiben die Unteransprüche.The invention is therefore based on the object of providing a method according to the preamble of claim 1 to create the series-friendly using measures a fine sealing of the rebate gap with sealing of the exposed cutting edge the folded joint ensures the inventive solution to this problem in the characterizing features of claim 1, advantageous designs this method is described in the subclaims.

Betrachtet man zwecks Veranschaulichung der Erfindung -ohne daß hierdurch eine Beschränkung des erfindungsgemäßen Verfahrens auf dieses technische Gebiet ausgesprochen sein soll- weiter die Herstellung von Kraftfahrzeugkarosserieteilen, so wird also bei dem erfindungsgemäßen Verfahren der Falzspalt einschließlich der freiliegenden äußeren Schnittkante (beispielsweise eines Klappenaußenblechs) im Rohbau oder in der Lackiererei durch Aufbringen einer zusätzlichen Dichtraupe aus einem durch Wärmezufuhr härtbaren Dichtmaterial versiegelt. Bei Aufbringen dieser Dichtraupe im Rohbau ergibt sich der Vorteil, daß das Aufbringen automatisierbar und nicht wic bei Aufbringen der Dichtraupe an der -im komplettierten Zustand- grundierten Karosserie durch die Einbaulage der Klappe o. dgl. bedingt erschwert ist. Es ist jedoch eriorderlich, die Dichtraupe für die mechanischen Beanspruchungen beim Anbau des betreffenden Teils, also beispielsweise einer Klappe, an die Karosserie sowie für nachfolgende Wasch- und Phosphatiervorgänge zu gelieren bzw. anzuhärten.If one considers for the purpose of illustrating the invention -without that thereby a restriction of the method according to the invention to this technical field should be pronounced - further the production of motor vehicle body parts, so in the method according to the invention, the rebate gap including the exposed outer cut edge (for example of an outer flap plate) in the Shell construction or in the paint shop by applying an additional sealing bead sealed with a hardenable sealing material. When applying this Sealing bead in the shell has the advantage that the application can be automated and not wic when applying the sealing bead to the -in the completed state- primed The body is made difficult by the installation position of the flap or the like. It is However, the sealing bead is essential for the mechanical stresses involved in cultivation of the part in question, for example a flap, to the body as well to gel or harden for subsequent washing and phosphating processes.

Grundsätzlich ist es möglich, diesen Anhärtungsvorgang in einem Umluftofen vorzunehmen, wobei die gesamte Klappe oder dergleichen auf Temperaturen um 1600 C erwärmt wird. Diese Methode erfordert jedoch eine Verweilzeit der Klappe in der Größenordnung von 15 Minuten im Umluftofen. Eine Beschlcunigung dieses Verfahrensschritts läßt sich grundsätzlich durch induktive Erwärmung der Falzverbindung erzielen, jedoch stellen sich dabei, wie umfangreiche Untersuchungen gezeigt haben, im wesentlichen zwei Nachteile ein: Zum cinen läßt sich auch mit induktiver Erwärmung in wirtschaftlich vertretbaren Bchandlungszeiten eine Gelierung des Dichtmaterials nicht erreichen, und zum anderen durchbricht beim induktiven Erwärmen die beim Falzvorgang eingeschlossene Luft die Dichtraupe und führt zu optisch sowie korrosionsmäßig nicht vertretbaren, teilweise aufgebrochenen Blasen.In principle, it is possible to carry out this initial hardening process in a convection oven make, with the entire flap or the like to temperatures around 1600 C is heated. However, this method requires a dwell time of the flap in the Around 15 minutes in a convection oven. An acceleration of this process step can basically be achieved by inductive heating of the seam connection, however As extensive studies have shown, this essentially arises two disadvantages: for cinening can also be done economically with inductive heating A gelling of the sealing material cannot be achieved within a reasonable working time, and on the other hand, when inductive heating occurs, the one enclosed in the folding process breaks through air the sealing bead and leads to optically and corrosion-wise unjustifiable, partially broken blisters.

Die Erfindung erschöpft sich demgemäß nicht einfach in dem Aufbringen einer Dichtraupe aus durch Wärmezufuhr gelicr- und/oder härtbarem Material (das mit dem Material des Klebers übereinstimmen kann, jedoch elastischer abgestimmt sein wird), sondern beinhaltet auch eine bestimmte Aufeinanderfolge von zwei Wärmebehandlungen, die einerseits zu auch in der Großserienfertigung wirtschaftlich vertretbaren Behandlungszeiten führt und andererseits die beiden beschriebenen Nachteile mit Sicherheit vermeidet. Bei der Erfindung erfolgt also zunächst eine Wärmezufuhr zur Dichtraupe von außen her, beispielsweise durch eine etwa fünf Sekunden währende Infrarot-Bestrahlung, die zu einer Temperatur in der Größenordnung von 1400 C führt, während bei der zweiten Wärmebehandlung durch induktive Erwärmung des metallenen Materials der Falzverbindung gleichsam von innen her eine Wärmezufuhr zur Dichtraupe erfolgt. Diese zweite Wärmebehandlung kann in vorteilhafter Weise zugleich zur Gelierung und/ oder Härtung des Bördelnahtklebers dienen. Die dabei eriolgende Erwärmung der beim Falzvorgang eingeschlossenen Luft hat angesichts der äußeren Vorgelierung bzw. Vorhärtung des Materials der Dichtraupe keine unerwünschte Wirkung hinsichtlich Blasenbildung.Accordingly, the invention is not limited to simply applying it a sealing bead made of material that can be gelicr and / or hardened by the supply of heat (the can match the material of the adhesive, but matched more elastic will be), but also includes a specific sequence of two heat treatments, On the one hand, treatment times that are economically justifiable even in large-scale production leads and on the other hand avoids the two disadvantages described with certainty. In the invention, heat is first supplied to the sealing bead from the outside for example by infrared radiation for about five seconds, which leads to a temperature of the order of 1400 C, while at the second Heat treatment by inductive heating of the metal material of the folded seam heat is supplied to the sealing bead from the inside, as it were. This second heat treatment can advantageously at the same time for gelation and / or hardening of the flanged seam adhesive to serve. The resulting heating of the air trapped during the folding process has given the external pre-gelation or pre-hardening of the material of the sealing bead no undesirable effect in terms of blistering.

Anhand der Zeichnung sollen nochmals die Verhältnisse bei dem erfindungsgemäßen Verfahren erläutert werden: Es sei wiederum angenommen, die Falzverbindung befinde sich an einer Klappe, beispielsweise für den Kofferraum eines Kraftfahrzeugs. Diese Klappe wird gebildet durch das Außenblech 1 und das Innenblech 2, die bei 3 in üblicher Weise zur Falzverbindung gebogen sind. Man erkennt die äußere Schnittkante 4 des Außenblechs 1 am Ende des Falzspalts 5. Im Falzspalt 5 befindet sich der durch Wärmezufuhr härtbare Kleber 6, der eine feste und dichte Verbindung zwischen den beiden Blechen 1 und 3 herstellen soll.Based on the drawing, the relationships in the inventive Procedure to be explained: Assume again that the folded seam is located on a flap, for example for the trunk of a motor vehicle. These The flap is formed by the outer sheet 1 and the inner sheet 2, which is more common at 3 Way are bent to the seam connection. You can see the outer cutting edge 4 of the Outer sheet 1 at the end of the rebate gap 5. In the rebate gap 5 is the heat supply curable adhesive 6, which creates a firm and tight connection between the two metal sheets 1 and 3 should produce.

Da es außerordentlich schwierig ist, diese Verbindung gleichmäßig und dicht herzustellen, und da ferner die freie Kante 4 abgedeckt werden soll, wird auf diese und damit gleichsam auf das Ende des Falzspalts 5 die Dichtraupe 7 aus einem ebenfalls gelier- bzw. härtbaren Material aufgebracht. Zur Veranschaulichung der Abmessungsverhältnisse seien als Beispiele für das Außen- und Innenblech eine Stärke von etwa 0,8 mm und für die Spaltweite 100 lum genannt.Since it is extremely difficult to make this connection evenly and to be made tight, and since the free edge 4 is also to be covered on this and thus, as it were, to the end of the rebate gap 5 the Sealing bead 7 is applied from a likewise gellable or hardenable material. To the Illustrations of the dimensional relationships are given as examples for the external and inner sheet a thickness of about 0.8 mm and named for the gap width 100 lum.

Zur äußeren Vorgelierung bzw. Vorhärtung des Materials der Dichtraupe 7 erfogt zunächst eine äußere Wärmezufuhr zu der Dichtraupe 7, bevorzugt durch eine einige Sekunden währende Infrarotbestrahlung. Dadurch erfolgt also praktisch keine Erwärmung der metallenen Bestandteile der Falzverbindung 3 und damit eventuell im Falzspalt 5 beim Falzvorgang eingeschlossener Luft, so daß eine Blasenbildung nicht auftritt.For external pre-gelation or pre-hardening of the material of the sealing bead 7 initially takes place an external heat supply to the sealing bead 7, preferably by a Infrared radiation for a few seconds. As a result, there is practically no Heating of the metal components of the folded seam connection 3 and thus possibly in the Folding gap 5 trapped air during the folding process, so that no bubbles are formed occurs.

Danach erfolgt eine zweite Wärmebehandlung, jedoch jetzt durch Wärmezufuhr zum Material der Dichtraupe 7 im wesentlichen von innen, d.h. von den Blechen 1 und 2, her. Dazu erfolgt eine induktive Erwärmung der Falzverbindung 3 unter Anwendung einer üblichen und daher hier nicht zu beschreibenden Induktionsschleife. Diese Wärmebehandlung, die zugleich zur Härtung des Bördelnahtklebers 6 dient, führt zur endgültigen Härtung bzw. Gelierung des Materials der Dichtraupe 7, wobei die Ausdehnung eventuell im Falzspalt 5 enthaltener Luft infolge der Vorgelierung der Dichtraupe 7 nicht zur Blasenbildung führen kann.This is followed by a second heat treatment, but now with the addition of heat to the material of the sealing bead 7 essentially from the inside, i.e. from the metal sheets 1 and 2, ago. For this purpose, the folded seam 3 is heated inductively using it a conventional induction loop that cannot be described here. These Heat treatment, which also serves to harden the flanged seam adhesive 6, leads to final hardening or gelation of the material of the sealing bead 7, the expansion any air contained in the rebate gap 5 as a result of the pre-gelling of the sealing bead 7 cannot lead to the formation of bubbles.

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Claims (4)

PATENTANSPRÜCHE (5/Verfahren zum Herstellen einer dichten Falzverbindung, insbesondere bei Kraftfahrzeug-Karosserieteilen, mittels eines durch Wärmezufuhr gelier-und/oder härtbaren Bördelnahtklebers im Falzspalt und mittels einer diesem vorgeschalteten Dichtung, dadurch gekennzeichnet, daß als Dichtung eine Raupe (7) aus gelier- und/oder härtbarem Material an einer Schnittkante (4) der Falzverbindung (3) aufgebracht und nacheinander einer ersten Wärmebehandlung durch Wärmezufuhr-im wesentlichen zu ihrer freien äußeren Oberfläche und einer zweiten Wärmebehandlung durch Wärmezufuhr im wesentlichen von der Falzverbindung (3) her zu ihrer inneren Haftfläche unterzogen wird. PATENT CLAIMS (5 / method for producing a tight seam connection, especially in the case of motor vehicle body parts, by means of a heat supply gellable and / or hardenable flanged seam adhesive in the rebate gap and by means of this upstream seal, characterized in that a bead (7) made of gellable and / or hardenable material on a cut edge (4) of the folded joint (3) applied and successively a first heat treatment by heat supply-im essential to their free outer surface and a second heat treatment by supplying heat essentially from the folded seam connection (3) to its inner one Adhesive surface is subjected. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß bei der zweiten Wärmebehandlung zugleich die Gelierung und/oder Härtung des Bördelnahtklebers (6) erfolgt. 2. The method according to claim 1, characterized in that in the second heat treatment at the same time the gelation and / or hardening of the flange seam adhesive (6) takes place. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Wärmezufuhr bei der ersten Wärmebehandlung durch Infrarotbestrahlung der Raupe (7) erfolgt. 3. The method according to claim 1 or 2, characterized in that the heat input during the first heat treatment by infrared irradiation of the bead (7) takes place. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Wärmezufuhr bei der zweiten Wärmebehandlung durch induktive Erwärmung der Falzverbindung (3) erfolgt. 4. The method according to any one of claims 1 to 3, characterized in that that the heat supply in the second heat treatment by inductive heating of the Folded connection (3) takes place.
DE3238651A 1982-10-19 1982-10-19 Method for producing a tight fold connection Expired DE3238651C2 (en)

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DE3621758C1 (en) * 1986-06-28 1987-07-02 Bayerische Motoren Werke Ag Process for sealing a seam connection
WO1992008762A1 (en) * 1990-11-19 1992-05-29 Forsstroem Willy Method for affixing elements using a polymer and a device for carrying out the method
EP0619351A1 (en) * 1993-04-06 1994-10-12 Alusuisse-Lonza Services Ag Method for connecting metal components
EP0700337A1 (en) * 1993-05-25 1996-03-13 Lord Corporation Method for obtaining mechanical lock between surfaces
US5730446A (en) * 1995-06-20 1998-03-24 Minnesota Mining And Manufacturing Company Sealing strip suitable for sealing a hem flange
EP0936096A1 (en) * 1998-02-17 1999-08-18 Donnelly Corporation Ready-to-install vehicular panel assembly by menas of a heat activatable adhesive
US6054001A (en) * 1998-02-17 2000-04-25 Donnelly Corporation Vehicle assembly line-side heat activation of a "ready-to-install" window fixing adhesive for attachment of a vehicle window to a vehicle
EP1041130A3 (en) * 1999-04-01 2000-12-13 Volkswagen Aktiengesellschaft Method for sealing a flange fold
US6186579B1 (en) * 1998-03-12 2001-02-13 Daimlerchrysler Ag Body section for a motor vehicle body
DE10033768A1 (en) * 2000-07-12 2002-01-24 Volkswagen Ag Thin metal folding process for automobile part manufacture involves heating the thin area to be folded
EP1186642A1 (en) * 2000-09-12 2002-03-13 Sika AG, vorm. Kaspar Winkler &amp; Co. Adhesives for car bodywork construction
US6460914B2 (en) * 2000-07-13 2002-10-08 Compagnie Plastic Omnium Assembly of bodywork parts, at least one of them including an overmolded film
EP1293387A2 (en) * 2001-09-13 2003-03-19 Wilhelm Karmann GmbH Vehicle body and method and means for filling a seam of a vehicle body
WO2004101315A2 (en) * 2003-05-19 2004-11-25 Volvo Lastvagnar Ab Method for manufacturing a panel-shaped component, and a body component
DE102006006848A1 (en) * 2006-02-15 2007-08-16 Bayerische Motoren Werke Ag Fold-adhesive bonding especially of vehicle bodywork parts with relative movement involves applying a first adhesive and a sealing adhesive in neighboring bands
WO2008077918A1 (en) 2006-12-21 2008-07-03 Sika Technology Ag Edging-fold bond
DE102008004754A1 (en) * 2008-01-16 2009-07-23 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Joining plastic parts applied on a metallic carrier as connecting medium by induction heating, comprises inductively heating a plastic part, which is applied on flat sheet metal plate, from side opposite to side of flat sheet metal plate
WO2014037392A1 (en) 2012-09-05 2014-03-13 Ford Global Technologies, Llc Raised seam
DE202015002556U1 (en) * 2015-04-02 2016-07-05 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) component
EP2596880A4 (en) * 2010-07-25 2016-08-10 Nakahara Co Ltd Panel manufacturing method
DE102016220237A1 (en) * 2016-10-17 2018-04-19 Tesa Se Method for producing a sealed seam connection
WO2019169237A1 (en) * 2018-03-02 2019-09-06 Dow Global Technologies, Llc Method of molding tubular composite structures
DE102020133584A1 (en) 2020-12-15 2022-06-15 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a component connection and component

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DE102011108293A1 (en) * 2011-07-21 2012-09-20 Daimler Ag Anti-corrosion treatment method of joint region in motor vehicle chassis, involves forming barrier layer over joint gap portion so as to prevent penetration of corrosive medium into joint gap portion

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DE3621758C1 (en) * 1986-06-28 1987-07-02 Bayerische Motoren Werke Ag Process for sealing a seam connection
EP0254870A2 (en) * 1986-06-28 1988-02-03 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Process for sealing a grooved assembly
EP0254870A3 (en) * 1986-06-28 1990-03-14 Bayerische Motoren Werke Aktiengesellschaft Process for sealing a grooved assembly
WO1992008762A1 (en) * 1990-11-19 1992-05-29 Forsstroem Willy Method for affixing elements using a polymer and a device for carrying out the method
EP0619351A1 (en) * 1993-04-06 1994-10-12 Alusuisse-Lonza Services Ag Method for connecting metal components
US5478424A (en) * 1993-04-06 1995-12-26 Alusuisse-Lonza Services Ltd. Process for joining components made of metal
EP0700337A1 (en) * 1993-05-25 1996-03-13 Lord Corporation Method for obtaining mechanical lock between surfaces
EP0825351A1 (en) * 1993-05-25 1998-02-25 Lord Corporation Method for obtaining mechanical lock between surfaces
EP0700337A4 (en) * 1993-05-25 1998-04-15 Lord Corp Method for obtaining mechanical lock between surfaces
US5730446A (en) * 1995-06-20 1998-03-24 Minnesota Mining And Manufacturing Company Sealing strip suitable for sealing a hem flange
US6521083B1 (en) 1998-02-17 2003-02-18 Donnelly Corporation Vehicle assembly line-side heat activation of a “ready-to-install” window fixing adhesive for attachment of a vehicle window to a vehicle
US6054001A (en) * 1998-02-17 2000-04-25 Donnelly Corporation Vehicle assembly line-side heat activation of a "ready-to-install" window fixing adhesive for attachment of a vehicle window to a vehicle
US6203639B1 (en) 1998-02-17 2001-03-20 Donnelly Corporation Vehicle assembly line-side heat activation of a “ready-to-install” window fixing adhesive for attachment of a vehicle window to a vehicle
EP0936096A1 (en) * 1998-02-17 1999-08-18 Donnelly Corporation Ready-to-install vehicular panel assembly by menas of a heat activatable adhesive
US6599386B2 (en) 1998-02-17 2003-07-29 Donnelly Corporation Vehicle assembly line-side heat activation of a “Ready-To-Install” window fixing adhesive for attachment of a vehicle window to a vehicle
US6186579B1 (en) * 1998-03-12 2001-02-13 Daimlerchrysler Ag Body section for a motor vehicle body
EP1041130A3 (en) * 1999-04-01 2000-12-13 Volkswagen Aktiengesellschaft Method for sealing a flange fold
DE10033768A1 (en) * 2000-07-12 2002-01-24 Volkswagen Ag Thin metal folding process for automobile part manufacture involves heating the thin area to be folded
US6460914B2 (en) * 2000-07-13 2002-10-08 Compagnie Plastic Omnium Assembly of bodywork parts, at least one of them including an overmolded film
EP1186642A1 (en) * 2000-09-12 2002-03-13 Sika AG, vorm. Kaspar Winkler &amp; Co. Adhesives for car bodywork construction
EP1293387A2 (en) * 2001-09-13 2003-03-19 Wilhelm Karmann GmbH Vehicle body and method and means for filling a seam of a vehicle body
EP1293387A3 (en) * 2001-09-13 2004-03-31 Wilhelm Karmann GmbH Vehicle body and method and means for filling a seam of a vehicle body
WO2004101315A3 (en) * 2003-05-19 2005-02-03 Volvo Lastvagnar Ab Method for manufacturing a panel-shaped component, and a body component
WO2004101315A2 (en) * 2003-05-19 2004-11-25 Volvo Lastvagnar Ab Method for manufacturing a panel-shaped component, and a body component
DE102006006848A1 (en) * 2006-02-15 2007-08-16 Bayerische Motoren Werke Ag Fold-adhesive bonding especially of vehicle bodywork parts with relative movement involves applying a first adhesive and a sealing adhesive in neighboring bands
WO2008077918A1 (en) 2006-12-21 2008-07-03 Sika Technology Ag Edging-fold bond
US9034135B2 (en) 2006-12-21 2015-05-19 Sika Technology Ag Hem flange joint
DE102008004754A1 (en) * 2008-01-16 2009-07-23 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Joining plastic parts applied on a metallic carrier as connecting medium by induction heating, comprises inductively heating a plastic part, which is applied on flat sheet metal plate, from side opposite to side of flat sheet metal plate
EP2596880A4 (en) * 2010-07-25 2016-08-10 Nakahara Co Ltd Panel manufacturing method
WO2014037392A1 (en) 2012-09-05 2014-03-13 Ford Global Technologies, Llc Raised seam
DE202015002556U1 (en) * 2015-04-02 2016-07-05 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) component
DE102016220237A1 (en) * 2016-10-17 2018-04-19 Tesa Se Method for producing a sealed seam connection
US11148407B2 (en) 2016-10-17 2021-10-19 Tesa Se Method for producing a sealed folded joint
WO2019169237A1 (en) * 2018-03-02 2019-09-06 Dow Global Technologies, Llc Method of molding tubular composite structures
CN111683804A (en) * 2018-03-02 2020-09-18 陶氏环球技术有限责任公司 Method of molding tubular composite structures
US11186047B2 (en) 2018-03-02 2021-11-30 Dow Global Technologies Llc Tubular composite structures and methods of molding such structures
DE102020133584A1 (en) 2020-12-15 2022-06-15 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a component connection and component

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