DE19814298A1 - Plastic fuel tank production by bonding shells together, using laser transmission welding - Google Patents
Plastic fuel tank production by bonding shells together, using laser transmission weldingInfo
- Publication number
- DE19814298A1 DE19814298A1 DE19814298A DE19814298A DE19814298A1 DE 19814298 A1 DE19814298 A1 DE 19814298A1 DE 19814298 A DE19814298 A DE 19814298A DE 19814298 A DE19814298 A DE 19814298A DE 19814298 A1 DE19814298 A1 DE 19814298A1
- Authority
- DE
- Germany
- Prior art keywords
- partial
- laser radiation
- fuel tank
- joining area
- welding
- 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- Withdrawn
Links
Classifications
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- 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
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
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- 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
- B29C65/16—Laser beams
- B29C65/1677—Laser beams making use of an absorber or impact modifier
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- 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
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
- B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
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- 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
-
- 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
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03177—Fuel tanks made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Kraftstofftanks umfassend einen Hohlkörper aus Kunststoff, der aus wenigstens zwei Teilkörpern herstellbar ist, die durch Verschweißung zu einem Gesamthohlkörper zusammengefügt werden.The present invention relates to a method for producing a fuel tank comprising a hollow body made of plastic, which can be produced from at least two partial bodies which are joined together by welding to form an overall hollow body.
Kraftstofftanks zum Beispiel für die Automobilindustrie umfassen in der Regel Hohlkörper aus Kunststoffen mit bestimmten Eigenschaften, in die dann weitere Bauelemente wie zum Beispiel Schwallwände oder dergleichen später eingebaut werden. An die zu verwendeten Materialien werden im allgemeinen hohe Anforderungen gestellt, unter anderem müssen diese eine große Dichtigkeit aufweisen, dürfen nur eine geringe Wasseraufnahme haben, müssen eine große mechanische Festigkeit aufweisen im Hinblick auf mögliche Gefahren bei Unfällen usw. Um die Dichtigkeit zu erreichen verwendet man häufig Kunststoffe wie zum Beispiel Polyethylen mit einer zusätzlichen Sperrschicht. Das Material aus dem diese Hohlkörper für Kraftstofftanks bestehen muß außerdem besonders alterungsbeständig sein, so daß vor der Einführung neuer Materialien aufwendige Langzeittests notwendig sind.Fuel tanks for the automotive industry, for example, usually include hollow bodies made of plastics with certain properties, in which further components such as Example baffles or the like can be installed later. To those to be used Materials are generally subject to high requirements, among other things must these have a high level of tightness, may only have a low water absorption, must have great mechanical strength with regard to possible dangers in the case of accidents etc. To achieve the tightness, plastics such as for example polyethylene with an additional barrier layer. The material from which this Hollow bodies for fuel tanks must also be particularly resistant to aging, so that extensive long-term tests are necessary before the introduction of new materials.
Die Herstellung solcher Hohlkörper für Kraftstofftanks durch die Technik des Blasformens hat sich als problematisch erwiesen, da es dabei in der Regel stellenweise zu unnötig dicken Wandstärken kommt. Man ist folglich dazu übergegangen, die Hohlkörper für Kraftstofftanks aus mehreren Teilkörpern herzustellen, die dann durch Verschweißung zu einem Gesamthohlkörper zusammengefügt werden. Dies hat auch den Vorteil, daß das Einbringen weiterer notwendiger Teile für den Kraftstofftank, wie zum Beispiel Schwallwände, bei der Fertigung einfacher ist, da diese vor dem Verschweißen der Teilkörper in oder an einem dieser Teilkörper montiert werden können.The production of such hollow bodies for fuel tanks by the technique of blow molding has proven to be problematic because it is usually too thick in places Wall thickness comes. One has therefore moved on to the hollow body for fuel tanks to produce from several partial bodies, which are then welded into one Entire hollow bodies are joined together. This also has the advantage that the introduction other necessary parts for the fuel tank, such as baffles, at the Manufacturing is easier, as this is in or on a before the partial body is welded this part of the body can be assembled.
Die EP 0 619 174 A1 beschreibt ein Verfahren der eingangs genannten Gattung, bei dem die Teilkörper durch Pressformen hergestellt werden und dann durch Kleben oder Schweißen zu dem Gesamthohlkörper verbunden werden. Wählt man eine Schweißverbindung, dann kommt das sogenannte Heizelement Schweißen in Betracht. Dieses hat aber den Nachteil, daß eine relativ große thermische Belastung der Teilkörper im Fügebereich auftritt, was sich nachteilig auf die Festigkeit der Schweißverbindung auswirken kann. Da hier im Hinblick auf die Verwendung für Kraftstofftanks besonders hohe Anforderungen zu stellen sind, wie sich aus den obigen Ausführungen ergibt, ist eine solche unzulängliche Schweißverbindung als sehr problematisch anzusehen.EP 0 619 174 A1 describes a method of the type mentioned at the beginning, in which the partial bodies are produced by press molding and then by gluing or Welding to be connected to the overall hollow body. If you choose one Welded connection, then the so-called heating element welding comes into consideration. However, this has the disadvantage that a relatively large thermal load on the partial body in Joining area occurs, which has an adverse effect on the strength of the welded joint can. Because here particularly high with regard to the use for fuel tanks Requirements, as can be seen from the above, is one inadequate weld connection to be regarded as very problematic.
Auf der Suche nach alternativen Verfahren hat es in jüngerer Zeit Überlegungen gegeben, Kunststoffteile mit Hilfe von Laserstrahlung zu verschweißen. Entsprechende Betrachtungen finden sich in dem Artikel "Entwicklungstendenzen beim Laserschweißen von Kunststoffen", H. Potente, E. Pecha, J. Korte in "PLASTVERARBEITER" 46. Jahrgang 1995 Nr. 10, Seiten 58 bis 64. In diesem Stand der Technik wird jedoch deutlich, daß es zwar theoretische Überlegungen zur Anwendung von Laserstrahlung in diesem Bereich gibt, bislang aber keine Versuche durchgeführt wurden und somit kaum Erkenntnisse über die praktische Anwendbarkeit solcher Verfahren insbesondere im industriellen Fertigungsbereich vorliegen.In the search for alternative methods, there have recently been considerations Welding plastic parts with the help of laser radiation. Appropriate considerations can be found in the article "Development trends in laser welding of plastics", H. Potente, E. Pecha, J. Korte in "PLASTVERARBEITER" 46th year 1995 No. 10, pages 58 to 64. In this prior art, however, it is clear that it is theoretical There are currently no considerations for the use of laser radiation in this area Experiments have been carried out and therefore little knowledge of the practical Applicability of such processes are present in particular in the industrial production area.
Die Aufgabe der vorliegenden Erfindung liegt darin ein Verfahren zur Herstellung eines Kraftstofftanks der eingangs genannten Gattung zu schaffen, bei dem wenigstens zwei Teilkörper zu einem Gesamthöhlkörper so zusammengefügt werden, daß eine dauerhaft beständige Fügeverbindung erzielt wird, die den genannten hohen Anforderungen für einen Einsatz als Kraftstofftank genügt.The object of the present invention is a method for producing a To create fuel tanks of the type mentioned, in which at least two Partial body to be assembled into a total hollow body so that a permanent stable joint connection is achieved, the high requirements mentioned for one Use as a fuel tank is sufficient.
Die Lösung der Aufgabe liefert ein erfindungsgemäßes Verfahren der eingangs genannten Gattung mit den kennzeichnenden Merkmalen des Hauptanspruchs. Es hat sich überraschenderweise gezeigt daß die Teilkörper mittels Einwirkung von Laserstrahlung verschweißt werden können und der so entstandene Gesamthohlkörper eine so beständige und stabile Schweißverbindung im Fügebereich aufweist, daß er zur Verwendung als Kraftstofftank unter Einhaltung der genannten Forderungen geeignet ist.The method according to the invention provides the solution to the problem Genus with the characteristic features of the main claim. It has Surprisingly, it has been shown that the partial bodies are exposed to laser radiation can be welded and the resulting hollow body is so durable and stable welded connection in the joining area that it can be used as Fuel tank is suitable in compliance with the requirements mentioned.
Versuche der Anmelderin haben gezeigt daß für die Verbindung der Teilkörper zu dem Gesamthohlkörper mittels Laserstrahlung besonders das Durchstrahlschweißverfahren geeignet ist. Vorzugsweise besteht dabei wenigstens einer der Teilkörper im Fügebereich aus für Laserstrahlung transparentem beziehungsweise weitgehend transparentem Material und wenigstens ein anderer Teilkörper besteht im Fügebereich vorzugsweise aus einem Material mit einer relativ hohen Absorptionskonstante. Dadurch wird erreicht, daß die Laserstrahlung durch den einen transparenten der Teilkörper im Fügebereich hindurchtritt und den anderen Teilkörper im Fügebereich erwärmt, da dort die Laserstrahlung mindestens teilweise absorbiert und in Wärme umgewandelt wird. Die Transparenz für Laserstrahlung beziehungsweise die Absorption kann man gemäß einer bevorzugten Weiterbildung der Erfindung beispielsweise dadurch erreichen, daß man dem Kunststoff aus dem die Teilkörper bestehen mindestens im Fügebereich entsprechende Füllstoffe beifügt beispielsweise dunkle Füllstoffe wie Ruß oder andere Füllstoffe wie SiO2 oder dergleichen, wenn eine Absorption gewünscht ist. Bei dem anderen Teilkörper, der für die Laserstrahlung weitgehend transparent sein soll, verwendet man entweder Füllstoffe, die kaum oder nicht absorbieren oder verzichtet ganz auf Füllstoffe oder verwendet Füllstoffe in einer geringeren Konzentration als bei dem anderen Teilkörper, so daß das Material für die Laserstrahlung bei der eingestrahlten Frequenz weitgehend transparent ist.Tests by the applicant have shown that the transmission welding method is particularly suitable for connecting the partial bodies to the overall hollow body by means of laser radiation. Preferably, at least one of the partial bodies in the joining area consists of material which is transparent or largely transparent to laser radiation, and at least one other partial body in the joining area preferably consists of a material with a relatively high absorption constant. It is thereby achieved that the laser radiation passes through one of the transparent partial bodies in the joining area and heats the other partial body in the joining area, since there the laser radiation is at least partially absorbed and converted into heat. According to a preferred development of the invention, the transparency for laser radiation or the absorption can be achieved, for example, by adding appropriate fillers to the plastic from which the partial bodies are made, for example dark fillers such as carbon black or other fillers such as SiO 2 or the like, if one Absorption is desired. In the other part of the body, which should be largely transparent to the laser radiation, either fillers are used which hardly or not absorb at all, or fillers are completely omitted, or fillers are used in a lower concentration than in the other part body, so that the material for the laser radiation the radiated frequency is largely transparent.
Gemäß einer bevorzugten Weiterbildung des erfindungsgemäßen Verfahrens geht man so vor, daß man die Teilkörper, die zu einem Gesamthohlkörper verschweißt werden, im Bereich ihrer Stirnflächen (Fügeflächen) gegeneinander preßt und die Laserstrahlung so einstrahlt, daß sie durch die Wandung des Teilkörpers aus dem weitgehend transparenten Material hindurchtritt und auf die Stirnfläche des Teilkörpers mit relativ hoher Absorptionskonstante in einem spitzen Winkel oder in einem rechten Winkel eintrifft und dadurch die Fügeflächen erwärmt und verschweißt werden. Vorzugsweise besteht wenigstens einer der Teilkörper wenigstens im Fügebereich aus Polyethylen, vorzugsweise aus HDPE.According to a preferred development of the method according to the invention, this is done before that the partial body, which are welded into a total hollow body, in Area of their end faces (joining surfaces) presses against each other and so the laser radiation radiates that it through the wall of the partial body from the largely transparent Material passes through and onto the end face of the partial body with a relatively high Absorption constant arrives at an acute angle or at a right angle and thereby the joining surfaces are heated and welded. Preferably there is at least one of the partial bodies at least in the joining area made of polyethylene, preferably made of HDPE.
Nachfolgend wird die vorliegende Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Zeichnungen näher beschrieben.The present invention is explained below using an exemplary embodiment Described in more detail with reference to the accompanying drawings.
Dabei zeigtIt shows
Fig. 1 einen ausschnittsweisen Querschnitt durch einen Hohlkörper für einen erfindungsgemäßen Kraftstofftank. Fig. 1 shows a partial cross section through a hollow body for a fuel tank according to the invention.
Ein erfindungsgemäßer Kraftstofftank wird hergestellt aus wenigstens zwei Teilkörpern 11, 12, die beispielsweise jeweils Halbschalen eines Gesamthohlkörpers 10 darstellen können, wenn sie miteinander verbunden werden. Die beiden Teilkörper 11, 12 weisen aufgrund ihrer Halbschalenform jeweils einander zugewandte Stirnflächen 11a, 12a auf, die zusammengefügt, vorzugsweise gegeneinander gepreßt werden und unter Einwirkung von Laserstrahlung 13 miteinander verschweißt werden. Die Laserstrahlung 13 wird erzeugt von der hier nur schematisch dargestellten Laservorrichtung 14.A fuel tank according to the invention is produced from at least two partial bodies 11 , 12 , which can each represent, for example, half-shells of a total hollow body 10 when they are connected to one another. Because of their half-shell shape, the two partial bodies 11 , 12 each have mutually facing end faces 11 a, 12 a, which are joined together, preferably pressed against one another, and welded to one another under the action of laser radiation 13 . The laser radiation 13 is generated by the laser device 14 shown only schematically here.
Zum Beispiel mit Hilfe von Füllstoffen ist der eine der beiden Teilkörper 11 mindestens im Fügebereich so eingefärbt, daß er für die eingestrahlte Laserstrahlung 13 weitgehend transparent ist. Beispielsweise kann man für diesen einen Teilkörper 11 einen Kunststoff verwenden, der farblos oder grau ist und für die eingestrahlte Laserstrahlung 13 eine praktisch vernachlässigbare Absorption hat. Der andere der beiden Teilkörper 12 ist wenigstens im Fügebereich zum Beispiel durch Füllstoffe so eingefärbt, daß er für die eingestrahlte Laserstrahlung 13 eine relativ hohe Absorptionskonstante aufweist, beispielsweise wird der Teilkörper 12 durch Füllstoffe wie Ruß oder ähnliches schwarz oder dunkel eingefärbt. Wie man sieht, wird die Laserstrahlung 13 so eingestrahlt, daß sie durch die Wandung des einen Teilkörpers, der aus einem für diese Laserstrahlung weitgehend transparenten Material besteht, hindurchtritt und dann auf die Stirnfläche 12a des anderen der beiden Teilkörper auftrifft, vorzugsweise in einem spitzen oder in einem rechten Winkel. Dadurch erzielt man eine Erwärmung dieser Stirnfläche 12a des einen Teilkörpers und letztendlich auch eine Erwärmung der Fügefläche 11a des anderen Teilkörpers, die mit der vorgenannten Fügefläche (Stirnfläche) in Berührung steht. Die aneinanderliegenden Stirnflächen 11a, 12a beider Teilkörper 11, 12 werden also durch diese Erwärmung angeschmolzen und nach dem Abkühlen erhält man einen Gesamthohlkörper 10 aus den beiden miteinander verschweißten Teilkörpern 11, 12. Das erfindungsgemäße Verfahren hat den Vorteil, daß die von der Laserstrahlung 13 erzeugte Wärme gezielt in die Fügeflächen im Bereich der zu erzeugenden Schweißnaht eingeleitet wird, während die Wandung des für die Laserstrahlung 13 weitgehend transparenten Teilkörpers 11 von der Laserstrahlung 13 durchstrahlt wird und in diesem durchstrahlten Bereich im wesentlichen keine Erwärmung auftritt. Wegen dieser geringen thermischen Belastung der zu verbindenden Teilkörper außerhalb der eigentlichen Schweißnaht ergibt sich eine gleichmäßige, stabile und dauerhaft beständige Schweißverbindung der beiden Teilkörper 11, 12 im Fügebereich ohne Fehlstellen.For example, with the aid of fillers, one of the two partial bodies 11 is colored at least in the joining area so that it is largely transparent to the irradiated laser radiation 13 . For example, one can use a plastic for this partial body 11 , which is colorless or gray and has a practically negligible absorption for the irradiated laser radiation 13 . The other of the two partial bodies 12 is colored at least in the joining area, for example by fillers, in such a way that it has a relatively high absorption constant for the irradiated laser radiation 13 , for example the partial body 12 is colored black or dark by fillers such as carbon black or the like. As can be seen, the laser radiation 13 is radiated in such a way that it passes through the wall of one partial body, which consists of a material that is largely transparent for this laser radiation, and then strikes the end face 12 a of the other of the two partial bodies, preferably in a pointed manner or at a right angle. This results in a heating of this end face 12 a of one part body and ultimately also a heating of the joining surface 11 a of the other part body, which is in contact with the abovementioned joining surface (end face). The abutting end faces 11 a, 12 a of both partial bodies 11 , 12 are thus melted by this heating and after cooling, a total hollow body 10 is obtained from the two partial bodies 11 , 12 welded together. The inventive method has the advantage that the heat generated by the laser beam 13 in the joining surfaces in the area which is initiated to be generated weld specifically, while the wall of the substantially transparent to the laser radiation 13 sub-body 11 is irradiated by the laser beam 13 and irradiated in this Area essentially no warming occurs. Because of this low thermal load on the part bodies to be connected outside the actual weld seam, there is a uniform, stable and permanently stable weld connection of the two part bodies 11 , 12 in the joining area without defects.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19814298A DE19814298A1 (en) | 1998-03-31 | 1998-03-31 | Plastic fuel tank production by bonding shells together, using laser transmission welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19814298A DE19814298A1 (en) | 1998-03-31 | 1998-03-31 | Plastic fuel tank production by bonding shells together, using laser transmission welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19814298A1 true DE19814298A1 (en) | 1999-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19814298A Withdrawn DE19814298A1 (en) | 1998-03-31 | 1998-03-31 | Plastic fuel tank production by bonding shells together, using laser transmission welding |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19954440A1 (en) * | 1999-11-11 | 2001-06-07 | Ktd Plasticon Kunststofftechni | Production of cylindrical moldings for use as pipes or in tanks comprises bending flat plastic sheet to form tube of desired diameter then using laser to weld edges together |
| DE19962613A1 (en) * | 1999-12-23 | 2001-07-05 | Hella Kg Hueck & Co | Radiation welding process for joining plastic components which uses a heat activated foaming agent at the welding joint |
| DE10112133A1 (en) * | 2001-03-14 | 2002-09-19 | Bayerische Motoren Werke Ag | Metal fuel tank for motor vehicle has cover sealing off fitting opening for fuel system components and connected to part of tank defining fitting opening by glued joint |
| FR2822440A1 (en) * | 2001-03-22 | 2002-09-27 | Neyr Plastiques Holding | Method of manufacturing automobile cooling circuit coolant recovery reservoir comprises manufacturing two half bodies and orienting them along joint line according to engine compartment installation position |
| US6592239B1 (en) * | 1999-04-12 | 2003-07-15 | Koito Manufacturing Co., Ltd. | Vehicular lamp and method for producing same |
| WO2005005851A1 (en) * | 2003-07-15 | 2005-01-20 | Toyo Tire & Rubber Co., Ltd. | Resinous joint boot |
| WO2005053935A1 (en) * | 2003-11-29 | 2005-06-16 | Barkston Plastics Engineering Ltd | Welding of plastics materials |
| DE10000289B4 (en) * | 2000-01-07 | 2005-10-13 | Hella Kgaa Hueck & Co. | Pipe for providing a washing liquid in a windscreen washer system for motor vehicles |
| WO2006037712A1 (en) * | 2004-10-01 | 2006-04-13 | Siemens Aktiengesellschaft | Pressure regulator for a fuel supply unit and method for production of a pressure regulator |
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| US7244482B2 (en) | 2000-06-28 | 2007-07-17 | Coloplast A/S | Method for welding components of a multi-layer construction |
| DE102008020943A1 (en) | 2008-04-25 | 2009-10-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for joining at least two transparent joining partners by means of laser transmission welding |
| DE10059160B4 (en) * | 2000-01-25 | 2010-12-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flat vehicle component, namely bumper, door or fender trim or boot lid |
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| US7875147B2 (en) | 2004-04-14 | 2011-01-25 | Basf Akiengesellschaft | Method for welding together plastic parts with the aid of laser radiation |
| US8092884B2 (en) | 2009-07-02 | 2012-01-10 | Basf Se | Single layer fuel tank |
| DE102017119707A1 (en) * | 2017-08-28 | 2019-02-28 | Kautex Textron Gmbh & Co. Kg | Liquid container and method of manufacturing a liquid container |
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| US6592239B1 (en) * | 1999-04-12 | 2003-07-15 | Koito Manufacturing Co., Ltd. | Vehicular lamp and method for producing same |
| DE19954440C2 (en) * | 1999-11-11 | 2003-05-22 | Plasticon Germany Gmbh | Process for producing a hollow body |
| DE19954440A1 (en) * | 1999-11-11 | 2001-06-07 | Ktd Plasticon Kunststofftechni | Production of cylindrical moldings for use as pipes or in tanks comprises bending flat plastic sheet to form tube of desired diameter then using laser to weld edges together |
| DE19962613A1 (en) * | 1999-12-23 | 2001-07-05 | Hella Kg Hueck & Co | Radiation welding process for joining plastic components which uses a heat activated foaming agent at the welding joint |
| DE10000289B4 (en) * | 2000-01-07 | 2005-10-13 | Hella Kgaa Hueck & Co. | Pipe for providing a washing liquid in a windscreen washer system for motor vehicles |
| DE10059160B4 (en) * | 2000-01-25 | 2010-12-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flat vehicle component, namely bumper, door or fender trim or boot lid |
| US7244482B2 (en) | 2000-06-28 | 2007-07-17 | Coloplast A/S | Method for welding components of a multi-layer construction |
| US7572492B2 (en) | 2000-06-28 | 2009-08-11 | Coloplast A/S | Method for welding component of a multi-layer construction |
| DE10112133A1 (en) * | 2001-03-14 | 2002-09-19 | Bayerische Motoren Werke Ag | Metal fuel tank for motor vehicle has cover sealing off fitting opening for fuel system components and connected to part of tank defining fitting opening by glued joint |
| FR2822440A1 (en) * | 2001-03-22 | 2002-09-27 | Neyr Plastiques Holding | Method of manufacturing automobile cooling circuit coolant recovery reservoir comprises manufacturing two half bodies and orienting them along joint line according to engine compartment installation position |
| WO2005005851A1 (en) * | 2003-07-15 | 2005-01-20 | Toyo Tire & Rubber Co., Ltd. | Resinous joint boot |
| WO2005053935A1 (en) * | 2003-11-29 | 2005-06-16 | Barkston Plastics Engineering Ltd | Welding of plastics materials |
| US7875147B2 (en) | 2004-04-14 | 2011-01-25 | Basf Akiengesellschaft | Method for welding together plastic parts with the aid of laser radiation |
| US7828010B2 (en) | 2004-10-01 | 2010-11-09 | Continental Automotive Gmbh | Pressure regulator for a fuel supply unit and method for production of a pressure regulator |
| WO2006037712A1 (en) * | 2004-10-01 | 2006-04-13 | Siemens Aktiengesellschaft | Pressure regulator for a fuel supply unit and method for production of a pressure regulator |
| CN101031718B (en) * | 2004-10-01 | 2011-08-03 | 西门子公司 | Pressure regulator for a fuel supply unit and method for production of a pressure regulator |
| DE102005046558A1 (en) * | 2005-09-28 | 2007-03-29 | Mann + Hummel Gmbh | Laser welding jig and laser welding process joins two work pieces in radial presentation to a longitudinal axis |
| ES2349225A1 (en) * | 2008-04-15 | 2010-12-29 | Sogefi Filtration, S.A. | Container for car fuel filters and procedure for its manufacture (Machine-translation by Google Translate, not legally binding) |
| DE102008020943A1 (en) | 2008-04-25 | 2009-10-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for joining at least two transparent joining partners by means of laser transmission welding |
| US8092884B2 (en) | 2009-07-02 | 2012-01-10 | Basf Se | Single layer fuel tank |
| DE102017119707A1 (en) * | 2017-08-28 | 2019-02-28 | Kautex Textron Gmbh & Co. Kg | Liquid container and method of manufacturing a liquid container |
| WO2019042901A1 (en) * | 2017-08-28 | 2019-03-07 | Kautex Textron Gmbh & Co. Kg | Liquid container and method for producing a liquid container |
| KR20200044051A (en) * | 2017-08-28 | 2020-04-28 | 카우텍스 텍스트론 게엠베하 운트 콤파니 카게 | Liquid containers and methods of manufacturing liquid containers |
| KR102353440B1 (en) * | 2017-08-28 | 2022-01-24 | 카우텍스 텍스트론 게엠베하 운트 콤파니 카게 | Liquid containers and methods of manufacturing liquid containers |
| US11724591B2 (en) | 2017-08-28 | 2023-08-15 | Kautex Textron Gmbh & Co. Kg | Liquid container and method for manufacturing a liquid container |
| WO2020187702A1 (en) | 2019-03-15 | 2020-09-24 | Lanxess Deutschland Gmbh | High voltage components |
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