DE3540520A1 - Method of producing a sealed interlocking joint, in particular in the bodyworks of motor vehicles - Google Patents

Method of producing a sealed interlocking joint, in particular in the bodyworks of motor vehicles

Info

Publication number
DE3540520A1
DE3540520A1 DE19853540520 DE3540520A DE3540520A1 DE 3540520 A1 DE3540520 A1 DE 3540520A1 DE 19853540520 DE19853540520 DE 19853540520 DE 3540520 A DE3540520 A DE 3540520A DE 3540520 A1 DE3540520 A1 DE 3540520A1
Authority
DE
Germany
Prior art keywords
seal
seam
folded
connection
hardened
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.)
Withdrawn
Application number
DE19853540520
Other languages
German (de)
Inventor
Hans Klaus 3180 Wolfsburg Könn
Folker Weissgerber
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 DE19853540520 priority Critical patent/DE3540520A1/en
Publication of DE3540520A1 publication Critical patent/DE3540520A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/038—Covering the joint by a coating material
    • B29C66/0382—Covering the joint by a coating material the coating material being in liquid or paste form
    • 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
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/038—Covering the joint by a coating material
    • 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
    • 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
    • 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
    • B29C65/48—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
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic 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
    • 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
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/54—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 way of applying the adhesive between pre-assembled parts
    • B29C65/542—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 way of applying the adhesive between pre-assembled parts by injection
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/54—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 way of applying the adhesive between pre-assembled parts
    • B29C65/544—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 way of applying the adhesive between pre-assembled parts by suction
    • 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
    • B29C65/52—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 way of applying the adhesive
    • B29C65/54—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 way of applying the adhesive between pre-assembled parts
    • B29C65/548—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 way of applying the adhesive between pre-assembled parts by capillarity
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

For the purpose of avoiding the necessity of subsequent heat treatments for hardening the material of a seal (6) covering the free cut edge (1') of an interlocking joint, material having thermoplastic properties is used, which material is transformed into a pasty state by applying heat before application to the interlocking joint and is hardened by heat removal by means of the sheet-metal parts (1, 2) of the interlocking joint. <IMAGE>

Description

■ a < τ ε \ :> --. ο ε L ι. 3 r: η a F τ 3180 Wolfsburg ■ a <τ ε \ :> -. ο ε L ι. 3 r : η a F τ 3180 Wolfsburg

- 3 K 3670/1770-hu-sa- 3 K 3670/1770-hu-sa

Verfahren zum Herstellen einer dichten Falzverbindung, insbesondere bei KraftfahrzeugkarosserienMethod for producing a tight seam connection, especially in the case of motor vehicle bodies

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of claim 1.

Wie in der DE-OS 32 38 651 dargelegt, ist es einerseits für den Korrosionsschutz ,' wichtig, eine einwandfreie Abdichtung des Falzspalts gegen den Außenraum sicher- ^ zustellen, andererseits aber schwierig, insbesondere während sich anschließender, mit Wärmezufuhr zur Falzverbindung verbundener Produktionsschritte den einwandfreien Zustand der Dichtmittel zu wahren.As set out in DE-OS 32 38 651, it is on the one hand for corrosion protection, ' It is important to ensure that the rebate gap is properly sealed against the outside space delivery, but on the other hand difficult, especially during subsequent, production steps connected with the supply of heat for the seam connection ensure the perfect Maintain the condition of the sealants.

Das diesem Problem Rechnung tragende Verfahren nach der genannten Offenlegungsschrift verwendet zur Gewinnung der Dichtung eine Raupe aus durch Wärmezufuhr gelier- und/oder härtbarem Material, die auf eine freie Schnittkante der Falzverbindung aufgebracht und nacheinander zwei Wärmebehandlungen, nämlich zunächst von außen und dann von der Falzverbindung her, zwecks gerichteter Aushärtung unterzogen wird.The method that takes this problem into account according to the above-mentioned patent application uses a bead made of heat to obtain the seal gellable and / or hardenable material, which is applied to a free cut edge of the folded joint applied and successively two heat treatments, namely first from the outside and then from the seam connection, for the purpose of directed curing is subjected.

Der Erfindung liegt die Aufgabe zugrunde, das Verfahren nach der DE-OS 32 38 651 unter Wahrung der günstigen Eigenschaften der so gewonnenen dichten Falzverbindung so abzuwandeln, daß eine zusätzliche bzw. nachträgliche Wärmebehandlung der Falzverbindung zwecks Ausgelierens bzw. Aushärtens des Materials der Dichtung überflüssig ist.The invention is based on the object of the process according to DE-OS 32 38 651 while maintaining the favorable properties of the tight seam connection obtained in this way to be modified so that an additional or subsequent heat treatment of the folded seam for the purpose of gelling or hardening of the material of the seal is superfluous.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Patentanspruchs 1, vorteilhafte Ausbildungen der Erfindung beschreiben die Unteransprüche.The solution to this problem according to the invention consists in the characterizing features of claim 1, advantageous embodiments of the invention are described in the subclaims.

Infolge der Verwendung eines Dichtungsmaterials, das thermoplastischen Charakter hat und demgemäß durch Wärmeentzug von den kühlen Blechen der Falzverbindung her nach seinem Auftragen ausgeliert bzw. aushärtet, werden zusätzliche Wärmebehandlungen der Falzverbindung zur Härtung des Dichtungsmaterials überflüssig. Dabei kann die Viskosität des Materials so eingestellt werden, daß noch im Falzspalt vorhandene Luft bei eventuell nachfolgenden Wärmebehandlungen, z.B. in Lacktrockenöfen, die Dichtung nicht durchdringen und demgemäß nicht zu offenen Blasen oder Kanälen führen kann.As a result of the use of a sealing material that is thermoplastic in character and accordingly by removing heat from the cool metal sheets of the folded joint gels or hardens after its application, additional heat treatments are carried out the seam connection for hardening the sealing material is superfluous. The viscosity of the material can be adjusted so that it is still in the rebate gap Existing air during any subsequent heat treatments, e.g. in paint drying ovens, cannot penetrate the seal and accordingly cannot lead to open bubbles or channels.

Ein weiterer Vorteil der Verwendung eines durch Wärmeentzug härtbaren Dichtungsmaterials ist darin zu sehen, daß während der Abkühlphasen dieses Materials im Falzspalt ein Unterdruck erzeugt und dadurch das Dichtungsmaterial in den nicht vom Bördelnahtkleber ausgefüllten Teil des Flanschspalts gesaugt wird.A further advantage of using a sealing material which can be hardened by extraction of heat is to be seen in the fact that this material is in the rebate gap during the cooling phases a negative pressure is generated and the sealing material is sucked into the part of the flange gap that is not filled by the flange seam adhesive.

Zunächst erfolgt also zur Herstellung der Falzverbindung das Auftragen des Bördelnahtklebers, z.B. eines Klebers auf der Basis eines PVC-Plastisols, Epoxidharzklebers, Polyacrylats oder Polyesters, und dann die Falzung der Bleche zur Herstellung der Falzverbindung. Dann wird zur Verhinderung des Durchtritts der hierbei in den Falzspalt noch eingeschlossenen Luft beispielsweise in nachfolgenden Lacktrockenöfen entweder unmittelbar nach dem Falzvorgang oder nach Vorhärtung des Bördelnahtklebers die Dichtung aufgetragen. Geeignete Materialien hierfür sind im Patentanspruch 2 angegeben. Besonders bevorzugt werden Polyamide einschließlich Blends (z.B. mit Polyäthylen) sowie gefüllte Typen, Polyester in Form von Polybutylterephthalat, Polyphenylchlorid als Blend mit Polystyrol oder Polycarbonat als Polymer oder als Blend, z.B. mit ABS. In der Regel wird man Haftvermittler, ggf. auch Korrosionsschutzinhibitoren, wie Zinkstaub, beifügen.First of all, the flanged seam adhesive is applied to produce the folded seam, e.g. an adhesive based on a PVC plastisol, epoxy resin adhesive, Polyacrylate or polyester, and then the folding of the metal sheets to produce the folded joint. Then to prevent the passage of this in the Seam gap still trapped air, for example in downstream paint drying ovens either immediately after the hemming process or after the flange seam adhesive has hardened applied the seal. Suitable materials for this are specified in claim 2. Polyamides including blends are particularly preferred (e.g. with polyethylene) and filled types, polyester in the form of polybutyl terephthalate, Polyphenyl chloride as a blend with polystyrene or polycarbonate as a polymer or as a blend, e.g. with ABS. As a rule, one becomes an adhesion promoter, possibly also corrosion protection inhibitors, like zinc dust.

Das Auftragen kann in der Weise erfolgen, daß das Material durch eine Förderpumpe mit beheizter Folgeplatte von dem festen Aggregatzustand in einen pastös-flüssigen Zustand überführt wird, in dem es auf die Bleche der Falzverbindung transportiert werden kann. Nach einer Zeit von beispielsweise größenordnungsmäßig 10 SekundenThe application can be done in such a way that the material by a feed pump with a heated follower plate from the solid state of aggregation to a pasty-liquid State is transferred in which it is transported to the metal sheets of the folded joint can be. After a time of, for example, of the order of 10 seconds

gibt das Dichtungsmaterial so viel Wärme an die umgebende Luft und die Bleche der Falzverbindung ab, daß es zu einer gut haftenden und festen Feinabdichtung erstarrt.the sealing material gives so much heat to the surrounding air and the sheets of the Folded connection from that it solidifies to a well-adhering and firm fine seal.

Es ist aber auch möglich, entsprechend den Patentansprüchen 6 und 7 das Dichtungsmaterial unter Verwendung eines handelsüblichen Spritzgußwerkzeugs aufzubringen, wodurch sich die Möglichkeit einer beliebigen, auch optisch ansprechenden und genau einzuhaltenden Form der Dichtung ergibt. Dabei lassen sich auch Dichtungsmaterialien mit relativ hohen Schmelzpunkten verwenden. Ein derartiges Verfahren ist infolge seiner hohen Taktzahl besonders für Serienfertigungen, beispielsweise von Karosserieteilen im Automobilbau, verwendbar.However, it is also possible, according to claims 6 and 7, to apply the sealing material using a commercially available injection molding tool, which results in the possibility of any optically appealing and precisely adhered to shape of the seal. Sealing materials with relatively high melting points can also be used. Due to its high cycle rate, such a method is particularly suitable for series production, for example of body parts in automobile construction.

Die Erfindung wird im folgenden anhand der Zeichnung erläutert, derenThe invention is explained below with reference to the drawing, whose

Fig. 1 einen Querschnitt durch eine erfindungsgemäß hergestellte dichte Falzverbindung und deren1 shows a cross section through a tight folded seam connection produced according to the invention and its

Fig. 2 einen Axialschnitt durch hier interessierende Teile eines Spritzgußwerkzeugs während der Herstellung der dichten Falzverbindung zeigt.2 shows an axial section through what is of interest here Shows parts of an injection molding tool during the production of the tight seam connection.

Betrachtet man zunächst Fig. 1, so besteht die Falzverbindung im wesentlichen aus den beiden Blechen 1 und 2, von denen das Blech 1 beispielsweise ein Türaußenblech und das Blech 2 ein Türinnenblech einer Kraftfahrzeugkarosserie ist. Im allgemein mit 3 bezeichneten Falzspalt befindet sich ein an sich bekannter Bördelnahtkleber 4, beispielsweise ein solcher, der durch Wärmezufuhr härtbar ist. Praktisch unvermeidbar sind dabei bei 5 angedeutete Lufteinschlüsse, die bei späteren weiteren Wärmebehandlungen, beispielsweise in Lacktrockenöfen, das Material der Dichtung 6 mechanisch beanspruchen. Diese mechanischen Beanspruchungen können dazu führen, daß in dem Material der die freie Flanschkante 1' überdeckenden Dichtung 6 offene Blasen oder Kanäle entstehen, durch die korrosionserzeugende Feuchtigkeit in den Falzspalt 3 gelangen kann.If one looks first at FIG. 1, the seam connection consists essentially of the two sheets 1 and 2, of which sheet 1 is, for example, an outer door sheet and the panel 2 is a door inner panel of an automobile body. In general with 3 designated seam gap there is a known flanged seam adhesive 4, for example one that can be hardened by supplying heat. Practically inevitable are at 5 indicated air inclusions, which in later further heat treatments, For example, in paint drying ovens, the material of the seal 6 stress mechanically. These mechanical stresses can lead to that in the material of the free flange edge 1 'covering seal 6 open Bubbles or channels are formed by the corrosion-producing moisture in the Rebate gap 3 can arrive.

Erfindungsgemäß ist als Material für die Dichtung 6 ein solches mit thermoplastischen Eigenschaften verwendet, das vor seinem Aufbringen durch Wärmezufuhr, beispielsweise mittels einer einer Förderpumpe nachgeschalteten beheizten Folgeplatte,According to the invention, the material for the seal 6 is a thermoplastic material Properties used before its application by applying heat, for example by means of a heated follower plate connected downstream of a feed pump,

in einen pastösen, das Aufbringen auf die Bleche 1 und 2 ermöglichenden Zustand gebracht ist und durch Wärmeentzug seitens der Umgebungsluft und der relativ kühlen Bleche 1 und 2 härtet. Während dieser Abkühlphase erfolgt im Falzspalt 3 eine Kontraktion auch der dort noch enthaltenen Luft, da zuvor eine Erwärmung zwecks Aushärtens des Bördelnahtklebers erfolgt war, und der hiermit verbundene Unterdruck saugt, wie bei 6' angedeutet, Material der Dichtung 6 in den Falzspalt 3 hinein. is brought into a paste-like state that enables application to the sheets 1 and 2 and cures due to the extraction of heat by the ambient air and the relatively cool sheets 1 and 2. During this cooling phase there is also a contraction of the air still contained in the rebate gap 3, since the flange seam adhesive had been heated beforehand for the purpose of hardening, and the associated negative pressure sucks material of the seal 6 into the rebate gap 3, as indicated at 6 '.

Die Viskosität des Materials der Dichtung β kann so eingestellt werden, daß, sofern die Falzverbindung nachträglichen Wärmebehandlungen unterzogen wird, die noch im Falzspalt 3 verbliebene Luft dabei die Dichtung 6 nicht durchdringen und offene Blasen oder Kanäle bilden kann.The viscosity of the material of the seal β can be adjusted so that, if the folded seam is subjected to subsequent heat treatments, which are still in the In the rebate gap 3 remaining air cannot penetrate the seal 6 and form open bubbles or channels.

In dem Ausführungsbeispiel der Fig. 2 ist angenommen, daß das Blech 20 der wiederum aus zwei Blechen 20 und 21 gebildeten Falzverbindung im Bereich seiner freien Falzkante 20' etwas nach oben abgebogen ist, so daß sich eine Art formschlüssige Verbindung mit der Dichtung 22 ergibt.In the embodiment of FIG. 2 it is assumed that the sheet metal 20 in turn Folded connection formed from two metal sheets 20 and 21 is slightly bent upwards in the region of its free folded edge 20 ', so that there is a kind of form-fitting Connection with the seal 22 results.

Die Dichtung 22 wird in diesem Ausführungsbeispiel nach einem an sich bekannten Spritzgußverfahren aufgebracht. Hierzu wird die Falzverbindung oder genauer: das gesamte Bauteil (hier eine Kraftfahrzeugtür) in eine die Formteile 23 und 24 aufweisende Form eingelegt, wobei das Formteil 23 einen Niederhalter bildet, durch den die Falzverbindung in in der Figur senkrechter Richtung zusammengepreßt wird. Ebenfalls im Formteil 23 ist eine mit dem Zuführungskanal 25 für das Material der Dichtung 22 kommunizierende Formausnehmung für die Dichtung 22 vorgesehen, so daß diese Dichtung eine vorbestimmte, auch optisch befriedigende Form erhält. Die Härtung des Materials der Dichtung 22 nach dem Auftragen derselben erfolgt durch Wärmeentzug im wesentlichen von den Falzblechen 20 und 21 und dem Formteil 23 her.The seal 22 is in this embodiment according to a known per se Injection molding process applied. For this purpose, the fold connection or, more precisely: that entire component (here a motor vehicle door) into one having the molded parts 23 and 24 Inserted the mold, the molded part 23 forming a hold-down device by means of which the folded seam connection is pressed together in the direction perpendicular in the figure. Also in the molded part 23 is one with the feed channel 25 for the material Seal 22 communicating shaped recess provided for the seal 22, so that this seal is given a predetermined, also optically satisfactory shape. the The material of the seal 22 is hardened after it has been applied Heat extraction essentially from the folding plates 20 and 21 and the molded part 23.

Claims (8)

PATENTANSPRÜCHEPATENT CLAIMS 1. Verfahren zum Herstellen einer dichten Falzverbindung, insbesondere bei Kraftfahrzeug-Karosserieteilen, mittels eines Bördelnahtklebers im Falzspalt und einer nach dem Falzvorgang auf eine freie Schnittkante der Falzverbindung aufgebrachten Dichtung aus einem durch Beeinflussung seiner Temperatur härtbaren Material, dadurch gekennzeichnet, daß ein Material mit thermoplastischen Eigen- ; schäften verwendet wird, das vor seinem Auftragen auf die Falzverbindung durch Wärmezufuhr in pastösen oder flüssigen Zustand gebracht und infolge Wärmeentzugs durch die Falzverbindung gehärtet wird.1. A method for producing a tight seam connection, in particular in the case of motor vehicle body parts, by means of a flanged seam adhesive in the rebate gap and a applied to a free cut edge of the folded joint after the folding process Seal made of a material which can be hardened by influencing its temperature, characterized in that a material with thermoplastic properties; shafts is used, which is carried out before it is applied to the seam joint Bred heat supply in pasty or liquid state and as a result of heat extraction is hardened by the seam connection. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Material aus der Gruppe Polyamide, EPDM/PP-Blends, thermoplastische Polyester, Polyphenylchlorid, Polycarbonat verwendet wird.2. The method according to claim 1, characterized in that a material from the Group polyamides, EPDM / PP blends, thermoplastic polyesters, polyphenyl chloride, Polycarbonate is used. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Material zumindest einen Haftvermittler enthält.3. The method according to claim 1 or 2, characterized in that the material contains at least one adhesion promoter. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Material zumindest einen Korrosionsinhibitor enthält.4. The method according to any one of claims 1 to 3, characterized in that the Material contains at least one corrosion inhibitor. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß vor Aufbringen der Dichtung das Falzmaterial (1) im Bereich der freien Schnittkante (I1) hochgestellt wird.5. The method according to any one of claims 1 to 4, characterized in that before applying the seal, the folding material (1) in the region of the free cut edge (I 1 ) is raised. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß vor Aufbringen der Dichtung die Falzverbindung in eine die Gestalt der Dichtung (22) bestimmende Form (23,24) gelegt und das Material der Dichtung (22) mittels eines Spritzgußwerkzeugs aufgebracht wird.6. The method according to any one of claims 1 to 5, characterized in that before Applying the seal the folded seam connection in the shape of the seal (22) defining shape (23,24) placed and the material of the seal (22) means an injection molding tool is applied. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Falzverbindung in der Form mittels eines Niederhalters (23) zusammengedrückt wird.7. The method according to claim 6, characterized in that the folded connection in the mold is compressed by means of a hold-down device (23). 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Viskosität des Materials so eingestellt wird, daß im Falzspalt (3) verbliebene Luft (5) bei nach Aufbringen der Dichtung (6) erfolgenden Erwärmungen der Falzverbindung, z.B. in Lacktrockenöfen, am Austritt gehindert ist.8. The method according to any one of claims 1 to 7, characterized in that the The viscosity of the material is adjusted so that air (5) remaining in the rebate gap (3) when the seal (6) is heated after the seal (6) has been applied Seam connection, e.g. in paint drying ovens, is prevented from exiting.
DE19853540520 1984-11-23 1985-11-15 Method of producing a sealed interlocking joint, in particular in the bodyworks of motor vehicles Withdrawn DE3540520A1 (en)

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DE3442688 1984-11-23
DE19853540520 DE3540520A1 (en) 1984-11-23 1985-11-15 Method of producing a sealed interlocking joint, in particular in the bodyworks of motor vehicles

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254870A2 (en) * 1986-06-28 1988-02-03 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Process for sealing a grooved assembly
DE3635829A1 (en) * 1986-10-22 1988-05-05 Happich Gmbh Gebr Anodised moulding and process for the production thereof
DE4224423A1 (en) * 1992-07-24 1994-01-27 Bayerische Motoren Werke Ag Sheet metal body panel for motor vehicle - has lock seam, which is curved, so that inner part surfaces almost touch
DE4300398A1 (en) * 1993-01-09 1994-07-14 Vaw Ver Aluminium Werke Ag Mfr. of motor vehicle body
DE4431991A1 (en) * 1994-09-08 1996-03-14 Bayerische Motoren Werke Ag Method of joining flat components such as in automobile and aircraft industries
DE19512102A1 (en) * 1995-04-03 1996-10-10 Kurt Prof Dr Ing Koppe Sheet part adhesive bonding for increased adhesive joint strength
DE19620196A1 (en) * 1996-05-20 1997-11-27 Audi Ag Process for forming a flat metal workpiece
DE19705864A1 (en) * 1997-02-15 1998-08-20 Daimler Benz Ag Bond between two coated metal sheets
DE19730560A1 (en) * 1997-07-17 1999-02-11 Daimler Benz Ag Process for making an adhesive bond
DE19749173A1 (en) * 1997-11-07 1999-05-27 Audi Ag Combined adhesive and positive connection for two components
DE19824977A1 (en) * 1998-06-04 1999-12-09 Volkswagen Ag Coating method esp. for mudguards of motor vehicle bodies
DE19831982A1 (en) * 1998-07-16 2000-01-20 Daimler Chrysler Ag Procedure for connecting sheet metal parts, especially for body shell of motor vehicle, entails maintaining narrow gap between parts between fixing points to allow liquid adhesive to form flat continuous film
EP0987166A1 (en) * 1998-09-16 2000-03-22 M.A.C. S.p.A. A structural element for a motor vehicle
DE20013813U1 (en) 2000-08-10 2000-11-23 BSH Bosch und Siemens Hausgeräte GmbH, 81669 München Connection between components for housings or claddings of household appliances or devices
DE19936388A1 (en) * 1999-08-03 2001-02-08 Volkswagen Ag Sealing system for doors of motor vehicles has secondary sealing strip installed on door aperture or door and in sections at least runs parallel to primary sealing strip
DE19936390A1 (en) * 1999-08-03 2001-02-15 Volkswagen Ag Motor vehicle door
DE19936389A1 (en) * 1999-08-03 2001-02-15 Volkswagen Ag Protective cover for a sheet metal fold
DE10052108A1 (en) * 2000-10-20 2002-05-02 Volkswagen Ag The procedure for the sealing of gaps between sheet metal parts procedure for sealing gaps between adjoining sheet metal parts entails filling gaps with free-flowing synthetic material based on PVC
EP1238713A1 (en) * 2001-02-28 2002-09-11 Bayerische Motoren Werke Aktiengesellschaft Method of sealing a scarf joint
EP1247852A1 (en) * 2001-04-04 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a edge-formed seam
EP1247853A1 (en) * 2001-04-04 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a edge-formed seam
DE10215904A1 (en) * 2002-04-11 2003-10-23 Bayerische Motoren Werke Ag vehicle door or flap with a shell structure comprises at least one filled elastic hose which is located between the edge of the inner shell and a section of the outer shell surrounding this edge
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
EP1935955A1 (en) * 2006-12-21 2008-06-25 Sika Technology AG Method for adhesively bonding a hem flange
DE102009004606A1 (en) 2009-01-14 2009-08-27 Daimler Ag Seam seal processing device, has circular brush coupled with motor e.g. electric motor, which produces rotation of brush such that sealing material is coated at seam by rotating brush, where seam seal is formed from sealing material
DE19504482B4 (en) * 1995-02-10 2010-04-01 Martinrea Industries, Inc., Manchester Method and apparatus for adhesive bonding using non-compressible particles
DE102012003760A1 (en) * 2012-02-24 2013-08-29 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Door e.g. front and back doors, for motor car, has outer skin connected with inner metal sheet over flanged connection part, and adhesive layer bridging distance formed by grading part between outer skin and inner metal sheet
WO2014037392A1 (en) 2012-09-05 2014-03-13 Ford Global Technologies, Llc Raised seam
CN103702782A (en) * 2011-05-31 2014-04-02 3M创新有限公司 Metal panel assembly and method for making same

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254870A3 (en) * 1986-06-28 1990-03-14 Bayerische Motoren Werke Aktiengesellschaft Process for sealing a grooved assembly
EP0254870A2 (en) * 1986-06-28 1988-02-03 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Process for sealing a grooved assembly
DE3635829A1 (en) * 1986-10-22 1988-05-05 Happich Gmbh Gebr Anodised moulding and process for the production thereof
DE4224423A1 (en) * 1992-07-24 1994-01-27 Bayerische Motoren Werke Ag Sheet metal body panel for motor vehicle - has lock seam, which is curved, so that inner part surfaces almost touch
DE4300398A1 (en) * 1993-01-09 1994-07-14 Vaw Ver Aluminium Werke Ag Mfr. of motor vehicle body
DE4431991A1 (en) * 1994-09-08 1996-03-14 Bayerische Motoren Werke Ag Method of joining flat components such as in automobile and aircraft industries
DE19504482B4 (en) * 1995-02-10 2010-04-01 Martinrea Industries, Inc., Manchester Method and apparatus for adhesive bonding using non-compressible particles
DE19512102A1 (en) * 1995-04-03 1996-10-10 Kurt Prof Dr Ing Koppe Sheet part adhesive bonding for increased adhesive joint strength
DE19620196A1 (en) * 1996-05-20 1997-11-27 Audi Ag Process for forming a flat metal workpiece
DE19705864A1 (en) * 1997-02-15 1998-08-20 Daimler Benz Ag Bond between two coated metal sheets
DE19705864C2 (en) * 1997-02-15 2002-05-02 Daimler Chrysler Ag Tight connection between two corrosion-protected sheets
DE19730560A1 (en) * 1997-07-17 1999-02-11 Daimler Benz Ag Process for making an adhesive bond
DE19749173A1 (en) * 1997-11-07 1999-05-27 Audi Ag Combined adhesive and positive connection for two components
DE19749173C2 (en) * 1997-11-07 2000-06-29 Audi Ag Combined adhesive and positive connection of two components
DE19824977A1 (en) * 1998-06-04 1999-12-09 Volkswagen Ag Coating method esp. for mudguards of motor vehicle bodies
DE19824977B4 (en) * 1998-06-04 2007-11-08 Volkswagen Ag Process for coating a body component and a body of a motor vehicle
DE19831982A1 (en) * 1998-07-16 2000-01-20 Daimler Chrysler Ag Procedure for connecting sheet metal parts, especially for body shell of motor vehicle, entails maintaining narrow gap between parts between fixing points to allow liquid adhesive to form flat continuous film
DE19831982C2 (en) * 1998-07-16 2003-04-10 Daimler Chrysler Ag Method for connecting sheet metal components
EP0987166A1 (en) * 1998-09-16 2000-03-22 M.A.C. S.p.A. A structural element for a motor vehicle
DE19936390A1 (en) * 1999-08-03 2001-02-15 Volkswagen Ag Motor vehicle door
DE19936389A1 (en) * 1999-08-03 2001-02-15 Volkswagen Ag Protective cover for a sheet metal fold
DE19936388A1 (en) * 1999-08-03 2001-02-08 Volkswagen Ag Sealing system for doors of motor vehicles has secondary sealing strip installed on door aperture or door and in sections at least runs parallel to primary sealing strip
DE19936390B4 (en) * 1999-08-03 2008-10-16 Volkswagen Ag Motor vehicle door
DE19936388B4 (en) * 1999-08-03 2008-09-04 Volkswagen Ag Door seal system
DE20013813U1 (en) 2000-08-10 2000-11-23 BSH Bosch und Siemens Hausgeräte GmbH, 81669 München Connection between components for housings or claddings of household appliances or devices
DE10052108A1 (en) * 2000-10-20 2002-05-02 Volkswagen Ag The procedure for the sealing of gaps between sheet metal parts procedure for sealing gaps between adjoining sheet metal parts entails filling gaps with free-flowing synthetic material based on PVC
DE10052108B4 (en) * 2000-10-20 2013-06-20 Volkswagen Ag Method for sealing sheet metal gaps
EP1238713A1 (en) * 2001-02-28 2002-09-11 Bayerische Motoren Werke Aktiengesellschaft Method of sealing a scarf joint
DE10116719A1 (en) * 2001-04-04 2002-10-31 Bayerische Motoren Werke Ag Method of sealing a flanged seam
EP1247853A1 (en) * 2001-04-04 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a edge-formed seam
EP1247852A1 (en) * 2001-04-04 2002-10-09 Bayerische Motoren Werke Aktiengesellschaft Method for sealing a edge-formed seam
DE10215904A1 (en) * 2002-04-11 2003-10-23 Bayerische Motoren Werke Ag vehicle door or flap with a shell structure comprises at least one filled elastic hose which is located between the edge of the inner shell and a section of the outer shell surrounding this edge
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
EP1935955A1 (en) * 2006-12-21 2008-06-25 Sika Technology AG Method for adhesively bonding a hem flange
US9034135B2 (en) 2006-12-21 2015-05-19 Sika Technology Ag Hem flange joint
CN101605859B (en) * 2006-12-21 2016-03-02 Sika技术股份公司 Edging-fold bond
DE102009004606A1 (en) 2009-01-14 2009-08-27 Daimler Ag Seam seal processing device, has circular brush coupled with motor e.g. electric motor, which produces rotation of brush such that sealing material is coated at seam by rotating brush, where seam seal is formed from sealing material
CN103702782A (en) * 2011-05-31 2014-04-02 3M创新有限公司 Metal panel assembly and method for making same
CN103702782B (en) * 2011-05-31 2016-12-07 3M创新有限公司 Metal decking assembly and preparation method thereof
DE102012003760A1 (en) * 2012-02-24 2013-08-29 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Door e.g. front and back doors, for motor car, has outer skin connected with inner metal sheet over flanged connection part, and adhesive layer bridging distance formed by grading part between outer skin and inner metal sheet
WO2014037392A1 (en) 2012-09-05 2014-03-13 Ford Global Technologies, Llc Raised seam

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