EP2834039B1 - Method for painting automotive plastic parts, in particular automotive bumpers - Google Patents

Method for painting automotive plastic parts, in particular automotive bumpers Download PDF

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Publication number
EP2834039B1
EP2834039B1 EP13718106.1A EP13718106A EP2834039B1 EP 2834039 B1 EP2834039 B1 EP 2834039B1 EP 13718106 A EP13718106 A EP 13718106A EP 2834039 B1 EP2834039 B1 EP 2834039B1
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EP
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Prior art keywords
cleaning
cleaning device
test body
painting
plastic parts
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EP13718106.1A
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German (de)
French (fr)
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EP2834039A1 (en
Inventor
Heinz Vogl
Stephan ZÜFLE
Uwe Trillitzsch
Bocar Biro Barry
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Rehau Automotive SE and Co KG
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Rehau AG and Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films

Definitions

  • the cleaning effect of the carbon dioxide is based inter alia on its abrasive action against the plastic component to be cleaned.
  • carbon dioxide is applied to a commercial scale by means of the cleaning device with specified parameters and the force is displayed in the form of grams / kilogram.
  • the force is displayed in the form of grams / kilogram.
  • the balance test only cumulative values of the nozzles can be displayed, since several nozzles are installed in each unit and these are operated together with a drive. That is, only the individual arrays (i.e., 3 pieces) and the total cleaning area can be considered, not the individual nozzles. Further, with a defective nozzle, the results of pressure and weight measurements are the same (consequently, a single defective nozzle can not be identified) because in this case the amount of material passed through is evenly distributed among the remaining nozzles.
  • the invention has for its object to provide a method with the features described above, which allows a test of the proper functional state of the cleaning device without this production must be interrupted.
  • the invention is based on the recognition that preferably the time intervals between the cleaning of two motor vehicle plastic components can be used to automatically move the cleaning device into a different test position from the cleaning position during this time.
  • a test position preferably fixed in a cleaning cabin (in which the method is interrupt insomnia carried out) installed test body with carbon dioxide from the cleaning device acted upon, which is immediately moved back to a cleaning position, so that the production process is not interrupted by the described test process or stopped.
  • the loading of the test body with the carbon dioxide is preferably likewise carried out automatically and allows a check of the functional state of the cleaning device at predetermined time intervals (eg after a predefined number of cleaned automotive plastic components or during existing process gaps), without the production process being impaired as a result.
  • the inspection is repetitively performed according to preset cycle times, e.g. each after a certain number of cleaned automotive plastic components.
  • the cleaning device is arranged on a robot arm.
  • the method of the cleaning device from a cleaning position to the test position can be done by a linear movement or by a pivoting movement, which of course both types of movement combined with each other, so can be superimposed.
  • the test body has sensors, in particular for pressure and / or temperature and / or force, at a plurality of test positions spaced apart from one another. These sensors are expediently in operative connection with an electronic data processing device which compares the measured values of the sensors with predetermined desired values.
  • the above-described arrangement of mutually spaced sensors allows a local evaluation of the functional state of the cleaning device, so that correspondingly also individual defective nozzles can be identified by means of this very precise test method.
  • the setpoint values can be determined, for example, by means of a calibration method, in which a corresponding loading of the test element takes place by means of a proven properly functioning cleaning device and the measured values of the measuring sensors determined here are used to determine the corresponding setpoint values.
  • the electronic data processing device expediently also determines a maximum permissible deviation of the actual values from the desired values. If a perfect functional state of the cleaning device is determined by the method according to the invention, the production process can be continued without any restriction. If an emerging tolerance violation is detected, it is expedient to use an upcoming time window, in which the production is interrupted anyway, for cleaning or repair / repair of the cleaning device. If the detected fault can be remedied by means of a method which can be carried out very quickly, the fault can be rectified even immediately after a test procedure, so that the cleaning device is already available for the next arriving motor vehicle component in good time and according to the Production process is not disturbed.
  • test body is plate-shaped.
  • the test body is preferably arranged on a device permanently installed in the cleaning cabin.
  • the exposure of the test body is evaluated photo-optically.
  • the spray pattern generated during the test process is preferably aligned with reference beam images. Based on a target-actual comparison, a conclusion is then drawn on the functional state of the cleaning device.
  • the test body consists e.g. made of metal or plastic, e.g. a rigid foam, wherein in particular the use of polystyrene rigid foam is within the scope of the invention.
  • a rigid foam wherein in particular the use of polystyrene rigid foam is within the scope of the invention.
  • the abrasive effect of the carbon dioxide cleaning agent is very good and consequently the perfect functional state of the cleaning device is very well detected by a spray pattern on a corresponding polystyrene foam test body.
  • the inspection process takes place between the cleaning of two consecutive motor vehicle plastic components and consequently the cleaning process for a single motor vehicle plastic component does not have to be interrupted for this purpose. Rather, the already existing time intervals between two cleaning operations are used to run in this time the testing process.
  • the cleaning device expediently has a plurality of, preferably differently oriented, nozzles for uniform application of the CO 2 to the motor vehicle plastic component.
  • the cleaning device has several, for example 3, so-called.
  • Arrays each containing a plurality, eg 6, nozzles. Consequently, the cleaning device in this case has 18 nozzles.
  • the number of test positions at which sensors are provided on the test body is expediently identical to the number of nozzles of the cleaning device. Consequently, in this case, exactly one nozzle is associated with each test position of the test body.
  • the nozzles of an array are supplied with CO 2 via a common supply line.
  • the Fig. 1 and 2 show a cleaning device 1, which is used in a method for painting automotive bumpers 2 are used.
  • a cleaning device 1 for this purpose a plurality of differently aligned nozzles 6 for uniform application of the CO 2 snow 5 on the vehicle bumper 2.
  • the cleaning device 1 is arranged on a robot arm 7, which is part of a corresponding cleaning robot 8.
  • the cleaning device 1 is also connected to an unillustrated supply system for providing the CO 2 .
  • the motor vehicle bumpers 2 enter a painting area 9, which is not shown in detail, and are provided there with at least one layer of paint by means of an automated painting process.
  • FIG. 2 is between the cleaning of two successive the cleaning area 4 continuous vehicle bumper 2 which is located in a cleaning cabin 10 cleaning device 1 for the purpose of checking the functional state of the same at predetermined intervals from a cleaning position 11 moved to a test position 12.
  • the cleaning device 1 then acts in the test position 12 as part of a test procedure, a test body 13 with carbon dioxide. Following this, the cleaning device 1 is moved back into its cleaning position 11 and is available for the cleaning of the next incoming vehicle bumper 2 in good time again.
  • An automated evaluation of the loading of the test body 12 with CO 2 is followed by a conclusion as to the functional state of the cleaning device 1.
  • test body 13 is in Fig. 3 shown in more detail. It can be seen that the test body 13 has at several, spaced-apart test positions 14 sensors 15, which serve to determine the pressure and the temperature at the respective test position 14.
  • the measuring sensors 15 are in operative connection with an electronic data processing device, not shown, which compares the measured values of the measuring sensors 15 with predetermined desired values.
  • the test body 13 is plate-shaped.
  • the test body 13 has 18 spaced-apart test positions 14.
  • the cleaning device 1 has three so-called. Arrays, each having six nozzles. Consequently, the cleaning device 1 has 18 nozzles. Accordingly, each nozzle 6 of the cleaning device 1 is assigned a test position 14 on the test body 13, which is equipped with corresponding sensors 15. Thus, it can be done for each nozzle 6 a detection of their proper functional condition.
  • the test body 13 is plate-shaped.
  • the test body 13 may be made of metal, but also of rigid foam.

Description

Die Erfindung betrifft ein Verfahren zur Lackierung von Kraftfahrzeug-Kunststoffbauteilen, insbesondere Kraftfahrzeug-Stoßfängern,

  • wobei zur Vorbereitung der Lackierung Kfz-Kunststoffbauteile einen Reinigungsbereich kontinuierlich durchlaufen und dort mittels einer automatisch betriebenen Reinigungsvorrichtung in einem Reinigungsvorgang mit Kohlendioxid (CO2), vorzugsweise CO2-Schnee oder CO2-Pellets, gereinigt werden und
  • wobei nach dem Reinigungsvorgang die durchlaufenden Kfz-Kunststoffbauteile in einen Lackierbereich gelangen und dort mittels eines automatisierten Lackiervorgangs mit mindestens einer Lackschicht versehen werden.
The invention relates to a method for painting motor vehicle plastic components, in particular motor vehicle bumpers,
  • wherein in preparation for painting automotive plastic components continuously pass through a cleaning area and there by means of an automatically operated cleaning device in a cleaning process with carbon dioxide (CO 2 ), preferably CO 2 snow or CO 2 pellets, cleaned and
  • wherein after the cleaning process, the continuous automotive plastic components reach a painting area and are provided there by means of an automated painting process with at least one lacquer layer.

Ein derartiges Verfahren ist aus der DE 10 2007 027 618 A1 bekannt. Bei Kfz-Kunststoffbauteilen, insbesondere Kfz-Stoßfängern aus Kunststoff, werden an die Qualität der Lackierung sehr hohe Anforderungen gestellt. Auch bei widrigen äußeren Bedingungen (Hitze, Feuchtigkeit, Schnee, Streusalzeinwirkung, etc.) muss das lackierte Kunststoff-Bauteil über viele Jahre hinweg sein ursprüngliches Aussehen beibehalten und darüber hinaus auch bis zu einem gewissen Grad mechanischen Einwirkungen standhalten können. Dies setzt voraus, dass die Lackschicht auf dem Kfz-Kunststoffbauteil sehr gut haftet. Um dies sicherzustellen, ist eine sorgfältige Reinigung des Bauteils unmittelbar vor der Lackierung zwingend erforderlich. Hierzu können beispielsweise wässrige Mehrzonen-Waschanlagen eingesetzt werden. Diese erfordern jedoch einen großen Platzbedarf und darüber hinaus ein relativ aufwändiges Management zur Wiederaufbereitung der großen hierfür benötigten Wassermengen. In jüngerer Zeit hat sich daher als Alternative die Reinigung mit Kohlendioxid, insbesondere in Form von Schnee oder Pellets, etabliert, welche eine wesentlich platzsparendere Reinigung der Kunststoff-Bauteile ermöglicht. Darüber hinaus ist bei diesem Verfahren keine aufwändige Wiederaufbereitung des Reinigungsmittels erforderlich, da das Kohlendioxid nach dessen Anwendung rückstandsfrei verdampft.Such a method is known from DE 10 2007 027 618 A1 known. In automotive plastic components, especially automotive bumpers made of plastic, very high demands are placed on the quality of the paint. Even in adverse external conditions (heat, moisture, snow, road salt, etc.), the painted plastic component must retain its original appearance over many years and also be able to withstand mechanical effects to a certain extent. This assumes that the paint layer adheres very well to the automotive plastic component. To ensure this, careful cleaning of the component immediately before painting is absolutely necessary. For this purpose, for example, aqueous multi-zone washing systems can be used. However, these require a large amount of space and also a relatively complex management for reprocessing the large amounts of water required for this purpose. More recently, therefore, cleaning with carbon dioxide, in particular in the form of snow or pellets, has established itself as an alternative, which allows a substantially more space-saving cleaning of the plastic components. Moreover, this process requires no time-consuming reprocessing of the cleaning agent, since the carbon dioxide evaporates without leaving any residue after it has been used.

Die Reinigungswirkung des Kohlendioxids beruht hierbei unter anderem auf dessen abrasiver Wirkung gegenüber dem zu reinigenden Kunststoff-Bauteil.The cleaning effect of the carbon dioxide is based inter alia on its abrasive action against the plastic component to be cleaned.

Um die zuvor beschriebene gründliche Reinigung des Kunststoff-Bauteils dauerhaft sicherzustellen, muss der einwandfreie Funktionszustand der Reinigungsvorrichtung zur Applikation des Kohlendioxids regelmäßig überprüft werden. Gemäß dem Stand der Technik erfolgt die Überprüfung des Funktionszustands manuell. Hierbei haben sich zwei unterschiedliche Verfahrensweisen etabliert: Zum einen wird mittels der Reinigungsvorrichtung ein Spritzbild auf einen Block aus Kunststoffmaterial appliziert, um die Kohlendioxidverteilung der Reinigungsvorrichtung zu überprüfen. Diese Überprüfung erfolgt mittels einer visuellen Begutachtung des Spritzbildes, welches sich auf dem Kunststoffblock abzeichnet. Nachteilig ist hierbei, dass sich unterschiedliche Qualitäten des Kunststoffblocks unmittelbar auf das Testergebnis auswirken. Unterschiedliche Oberflächenhärten des Materials zeigen unterschiedliche Strukturen des Applikationsergebnisses. Alternativ hierzu kann auch ein Waagentest durchgeführt werden. Hierbei wird mittels der Reinigungsvorrichtung mit festgelegten Parametern Kohlendioxid auf eine handelsübliche Waage appliziert und die Kraft in Form von Gramm / Kilogramm dargestellt. Beim Waagentest können jedoch nur kumulierte Werte der Düsen dargestellt werden, da in jeder Einheit mehrere Düsen verbaut sind und diese gemeinsam mit einer Ansteuerung betrieben werden. Das heißt, es können nur die einzelnen Arrays (i.d.R. 3 Stück) und die Gesamtreinigungsfläche betrachtet werden und nicht die einzelnen Düsen. Ferner sind bei einer defekten Düse die Ergebnisse von Druck- und Gewichtsmessungen gleich (folglich kann eine einzelne defekte Düse nicht identifiziert werden), da sich die Menge des durchgesetzten Materials in diesem Fall gleichmäßig auf die restlichen Düsen verteilt.In order to permanently ensure the thorough cleaning of the plastic component described above, the perfect functional state of the cleaning device for the application of carbon dioxide must be checked regularly. According to the prior art, the checking of the functional state takes place manually. In this case, two different procedures have established: On the one hand, a spray pattern is applied to a block of plastic material by means of the cleaning device in order to check the carbon dioxide distribution of the cleaning device. This check is carried out by means of a visual inspection of the spray pattern, which is evident on the plastic block. The disadvantage here is that different qualities of the plastic block directly affect the test result. Different surface hardnesses of the material show different structures of the application result. Alternatively, a balance test can be performed. Here, carbon dioxide is applied to a commercial scale by means of the cleaning device with specified parameters and the force is displayed in the form of grams / kilogram. In the case of the balance test, however, only cumulative values of the nozzles can be displayed, since several nozzles are installed in each unit and these are operated together with a drive. That is, only the individual arrays (i.e., 3 pieces) and the total cleaning area can be considered, not the individual nozzles. Further, with a defective nozzle, the results of pressure and weight measurements are the same (consequently, a single defective nozzle can not be identified) because in this case the amount of material passed through is evenly distributed among the remaining nozzles.

Ein besonders großer Nachteil der vorstehend beschriebenen Prüfverfahren ist insbesondere auch der hohe zeitliche Aufwand, der hierfür erforderlich ist. Daher können die vorbeschriebenen Tests nicht während, sondern nur vor oder nach Produktionsläufen durchgeführt werden. Eine Überprüfung der ordnungsgemäßen CO2-Applikation während der Produktion ist ferner nicht möglich, da ein Produktionsstopp erforderlich ist, um die Gerätschäften zur Durchführung der Prüfung betriebsbereit zu machen.A particularly great disadvantage of the test methods described above is in particular the high expenditure of time required for this purpose. Therefore, the above-described tests can not be performed during, but only before or after production runs. Verification of proper CO 2 application during production is also not possible because production stops are required to make the instrument shanks operational for testing.

Vor dem oben beschriebenen Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Verfahren mit den eingangs beschriebenen Merkmalen anzugeben, welches eine Prüfung des einwandfreien Funktionszustandes der Reinigungsvorrichtung ermöglicht, ohne dass hierzu die Produktion unterbrochen werden muss.Against the background described above, the invention has for its object to provide a method with the features described above, which allows a test of the proper functional state of the cleaning device without this production must be interrupted.

Erfindungsgemäß wird die Aufgabe dadurch gelöst,

  • dass die Reinigungsvorrichtung in vorgegebenen Zeitabständen aus einer Reinigungsposition in eine Prüfposition verfahren wird,
  • die Reinigungsvorrichtung danach im Rahmen eines Prüfvorganges einen Testkörper mit CO2 beaufschlagt,
  • hieran anschließend die Reinigungsvorrichtung wieder in eine Reinigungsposition zurückverfahren wird und
  • über eine, vorzugsweise automatisierte, Auswertung der Beaufschlagung des Testkörpers mit CO2 ein Rückschluss auf den Funktionszustand der Reinigungsvorrichtung erfolgt, so dass insgesamt durch den Prüfvorgang die automatisierte Reinigung der den Reinigungsbereich kontinuierlich durchlaufenden Kfz-Kunststoffbauteile zumindest im Wesentlichen unbeeinträchtigt bleibt.
According to the invention, this object is achieved
  • the cleaning device is moved from a cleaning position into a test position at predetermined time intervals,
  • the cleaning device is then exposed to CO 2 as part of a test procedure,
  • Thereafter, the cleaning device is back to a cleaning position and method
  • a conclusion on the functional state of the cleaning device is made via a, preferably automated, evaluation of the loading of the test body with CO 2 so that the automated cleaning of the vehicle plastic components continuously passing through the cleaning area remains at least substantially unimpaired by the test procedure.

Die Erfindung beruht auf der Erkenntnis, dass vorzugsweise die Zeitintervalle zwischen der Reinigung zweier Kfz-Kunststoff-Bauteile genutzt werden können, um in dieser Zeit die Reinigungsvorrichtung automatisch in eine von der Reinigungsposition verschiedene Testposition zu bewegen. In dieser Testposition wird ein, vorzugsweise fest in einer Reinigungskabine (in der das Verfahren zweckmäßgerweise durchgeführt wird) installierter, Testkörper mit Kohlendioxid von der Reinigungsvorrichtung beaufschlagt, woraufhin diese unmittelbar wieder in eine Reinigungsposition verfahren wird, so dass der Produktionsprozess durch den beschriebenen Prüfvorgang nicht unterbrochen bzw. angehalten wird. Die Beaufschlagung des Testkörpers mit dem Kohlendioxid wird vorzugsweise ebenfalls automatisiert durchgeführt und ermöglicht hierüber eine Überprüfung des Funktionszustandes der Reinigungsvorrichtung in vorgegebenen Zeitabständen (z.B. nach einer vordefinierten Anzahl gereinigter Kfz-Kunststoff-Bauteile oder während vorhandener Prozesslücken), ohne dass der Produktionsprozess hierdurch beeinträchtigt wird.The invention is based on the recognition that preferably the time intervals between the cleaning of two motor vehicle plastic components can be used to automatically move the cleaning device into a different test position from the cleaning position during this time. In this test position a, preferably fixed in a cleaning cabin (in which the method is zweckmäßgerweise carried out) installed test body with carbon dioxide from the cleaning device acted upon, which is immediately moved back to a cleaning position, so that the production process is not interrupted by the described test process or stopped. The loading of the test body with the carbon dioxide is preferably likewise carried out automatically and allows a check of the functional state of the cleaning device at predetermined time intervals (eg after a predefined number of cleaned automotive plastic components or during existing process gaps), without the production process being impaired as a result.

Vorzugsweise wird der Prüfvorgang gemäß voreingestellter Zykluszeiten wiederkehrend durchgeführt, z.B. jeweils nach einer bestimmten Anzahl gereinigter Kfz-Kunststoffbauteile.Preferably, the inspection is repetitively performed according to preset cycle times, e.g. each after a certain number of cleaned automotive plastic components.

Vorzugsweise ist die Reinigungsvorrichtung an einem Roboterarm angeordnet. Das Verfahren der Reinigungsvorrichtung aus einer Reinigungsposition in die Prüfposition kann durch eine Linearbewegung oder auch durch eine Schwenkbewegung erfolgen, wobei selbstverständlich auch beide Bewegungsarten miteinander kombiniert, also einander überlagert werden können.Preferably, the cleaning device is arranged on a robot arm. The method of the cleaning device from a cleaning position to the test position can be done by a linear movement or by a pivoting movement, which of course both types of movement combined with each other, so can be superimposed.

Zweckmäßigerweise weist der Testkörper an mehreren, voneinander beabstandeten Testpositionen Messaufnehmer, insbesondere für Druck und / oder Temperatur und / oder Kraft, auf. Diese Messaufnehmer stehen zweckmäßigerweise in Wirkverbindung mit einer elektronischen Datenverarbeitungseinrichtung, welche die Messwerte der Messaufnehmer mit vorgegebenen Soll-Werten vergleicht. Die vorbeschriebene Anordnung von voneinander beabstandeten Messaufnehmern ermöglicht eine lokale Auswertung des Funktionszustandes der Reinigungsvorrichtung, so dass entsprechend auch einzelne defekte Düsen mittels dieses sehr exakten Prüfverfahrens identifiziert werden können. Die Soll-Werte können beispielsweise mittels eines Kalibrierverfahrens ermittelt werden, bei dem mittels einer nachgewiesenermaßen einwandfrei funktionierenden Reinigungsvorrichtung eine entsprechende Beaufschlagung des Testkörpers erfolgt und die hierbei ermittelten Messwerte der Messaufnehmer zur Ermittlung der entsprechenden Soll-Werte herangezogen werden. Über die elektronische Datenverarbeitungseinrichtung wird zweckmäßigerweise auch eine maximal zulässige Abweichung der Ist-Werte von den Soll-Werten festgelegt. Sofern mittels des erfindungsgemäßen Verfahrens ein einwandfreier Funktionszustand der Reinigungsvorrichtung festgestellt wird, kann der Produktionsprozess ohne jegliche Einschränkung fortgeführt werden. Sofern eine sich abzeichnende Toleranzüberschreitung festgestellt wird, wird zweckmäßigerweise entsprechend ein kommendes Zeitfenster, bei dem die Produktion ohnehin unterbrochen wird, zur Reinigung bzw. Wiederinstandsetzung / Reparatur der Reinigungsvorrichtung herangezogen. Sofern die festgestellte Störung sich mittels einer sehr schnell durchführbaren Methodik beheben lässt, kann ggf. sogar unmittelbar nach einem Prüfvorgang eine Behebung des Fehlers erfolgen, so dass die Reinigungsvorrichtung bereits wieder für das nächste ankommende Kfz-Kunststoff-Bauteil rechtzeitig zur Verfügung steht und entsprechend der Produktionsprozess nicht gestört wird.Expediently, the test body has sensors, in particular for pressure and / or temperature and / or force, at a plurality of test positions spaced apart from one another. These sensors are expediently in operative connection with an electronic data processing device which compares the measured values of the sensors with predetermined desired values. The above-described arrangement of mutually spaced sensors allows a local evaluation of the functional state of the cleaning device, so that correspondingly also individual defective nozzles can be identified by means of this very precise test method. The setpoint values can be determined, for example, by means of a calibration method, in which a corresponding loading of the test element takes place by means of a proven properly functioning cleaning device and the measured values of the measuring sensors determined here are used to determine the corresponding setpoint values. The electronic data processing device expediently also determines a maximum permissible deviation of the actual values from the desired values. If a perfect functional state of the cleaning device is determined by the method according to the invention, the production process can be continued without any restriction. If an emerging tolerance violation is detected, it is expedient to use an upcoming time window, in which the production is interrupted anyway, for cleaning or repair / repair of the cleaning device. If the detected fault can be remedied by means of a method which can be carried out very quickly, the fault can be rectified even immediately after a test procedure, so that the cleaning device is already available for the next arriving motor vehicle component in good time and according to the Production process is not disturbed.

Zweckmäßigerweise ist der Testkörper plattenförmig ausgebildet. Der Testkörper ist vorzugsweise auf einer in der Reinigungskabine fest installierten Vorrichtung angeordnet.Conveniently, the test body is plate-shaped. The test body is preferably arranged on a device permanently installed in the cleaning cabin.

Im Rahmen der Erfindung liegt es auch, dass die Beaufschlagung des Testkörpers fotooptisch ausgewertet wird. Bei der fotooptischen Auswertung wird vorzugsweise das beim Prüfvorgang erzeugte Strahlbild mit Referenz-Strahlbildern abgeglichen. Anhand eines Soll-Ist-Vergleichs erfolgt dann ein Rückschluss auf den Funktionszustand der Reinigungsvorrichtung.In the context of the invention, it is also the case that the exposure of the test body is evaluated photo-optically. In the photo-optical evaluation, the spray pattern generated during the test process is preferably aligned with reference beam images. Based on a target-actual comparison, a conclusion is then drawn on the functional state of the cleaning device.

Der Testkörper besteht z.B. aus Metall oder auch aus Kunststoff, z.B. einem Hartschaumstoff, wobei insbesondere der Einsatz von Polystyrol-Hartschaumstoff im Rahmen der Erfindung liegt. Auf diesem Material zeichnet sich die abrasive Wirkung des Kohlendioxid-Reinigungsmittels sehr gut ab und folglich ist der einwandfreie Funktionszustand der Reinigungsvorrichtung sehr gut anhand eines Spritzbildes auf einem entsprechenden Polystyrol-Hartschaumstoff -Testkörper feststellbar.The test body consists e.g. made of metal or plastic, e.g. a rigid foam, wherein in particular the use of polystyrene rigid foam is within the scope of the invention. On this material, the abrasive effect of the carbon dioxide cleaning agent is very good and consequently the perfect functional state of the cleaning device is very well detected by a spray pattern on a corresponding polystyrene foam test body.

Im Rahmen der Erfindung liegt es, dass der Prüfvorgang zwischen der Reinigung zweier aufeinanderfolgender Kfz-Kunststoff-Bauteile erfolgt und folglich der Reinigungsvorgang für ein einzelnes Kfz-Kunststoff-Bauteil hierfür nicht unterbrochen werden muss. Vielmehr werden die ohnehin vorhandenen Zeitintervalle zwischen zwei Reinigungsvorgängen genutzt, um in dieser Zeit den Prüfvorgang ablaufen zu lassen.It is within the scope of the invention that the inspection process takes place between the cleaning of two consecutive motor vehicle plastic components and consequently the cleaning process for a single motor vehicle plastic component does not have to be interrupted for this purpose. Rather, the already existing time intervals between two cleaning operations are used to run in this time the testing process.

Die Reinigungsvorrichtung weist zweckmäßigerweise mehrere, vorzugsweise unterschiedlich ausgerichtete, Düsen zur gleichmäßigen Applikation des CO2 auf das Kfz-Kunststoff-Bauteil auf. In der Regel verfügt die Reinigungsvorrichtung über mehrere, z.B. 3, sog. Arrays, welche jeweils mehrere, z.B. 6, Düsen beinhalten. Folglich weist die Reinigungsvorrichtung in diesem Fall 18 Düsen auf. Zweckmäßigerweise ist die Anzahl der Testpositionen, an denen auf dem Testkörper Messaufnehmer vorgesehen sind, identisch mit der Anzahl der Düsen der Reinigungsvorrichtung. Folglich ist in diesem Fall jeder Testposition des Testkörpers genau eine Düse zugeordnet. Die Düsen eines Arrays werden über eine gemeinsame Versorgungsleitung mit CO2 versorgt.The cleaning device expediently has a plurality of, preferably differently oriented, nozzles for uniform application of the CO 2 to the motor vehicle plastic component. As a rule, the cleaning device has several, for example 3, so-called. Arrays, each containing a plurality, eg 6, nozzles. Consequently, the cleaning device in this case has 18 nozzles. The number of test positions at which sensors are provided on the test body is expediently identical to the number of nozzles of the cleaning device. Consequently, in this case, exactly one nozzle is associated with each test position of the test body. The nozzles of an array are supplied with CO 2 via a common supply line.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlich erläutert. Es zeigen schematisch:

Fig. 1
eine erfindungsgemäße Reinigungsvorrichtung zur Reinigung von Kfz-Stoßfängern,
Fig. 2
eine schematische Darstellung des Ablaufs des erfindungsgemäßen Verfahrens und
Fig. 3
einen in Fig. 2 dargestellten Testkörper in vergrößerter Darstellung.
In the following the invention will be explained in detail with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1
a cleaning device according to the invention for cleaning motor vehicle bumpers,
Fig. 2
a schematic representation of the sequence of the method according to the invention and
Fig. 3
one in Fig. 2 shown test body in an enlarged view.

Die Fig. 1 und 2 zeigen eine Reinigungsvorrichtung 1, welche bei einem Verfahren zur Lackierung von Kfz-Stoßfängern 2 zum Einsatz kommt. Hierbei durchlaufen kontinuierlich (s. Pfeile in Fig. 2) zur Vorbereitung der Lackierung auf Trägern 3 angeordnete Kfz-Stoßfänger 2 einen Reinigungsbereich 4 und werden dort mittels der automatisch betriebenen Reinigungsvorrichtung 1 in einem Reinigungsvorgang mit CO2-Schnee 5 (oder alternativ CO2-Pellets) gereinigt. Wie dem vergrößerten Ausschnitt der Fig. 1 zu entnehmen ist, weist die Reinigungsvorrichtung 1 hierzu mehrere unterschiedlich ausgerichtete Düsen 6 zur gleichmäßigen Applikation des CO2-Schnees 5 auf die Kfz-Stoßfänger 2 auf. Die Reinigungsvorrichtung 1 ist an einem Roboterarm 7 angeordnet, der Bestandteil eines entsprechenden Reinigungsroboters 8 ist. Die Reinigungsvorrichtung 1 ist ferner an ein nicht dargestelltes Versorgungssystem zur Bereitstellung des CO2 angeschlossen. Nach dem Reinigungsvorgang gelangen die Kfz-Stoßfänger 2 in einen nicht näher dargestellten Lackierbereich 9 und werden dort mittels eines automatisierten Lackiervorgangs mit mindestens einer Lackschicht versehen.The Fig. 1 and 2 show a cleaning device 1, which is used in a method for painting automotive bumpers 2 are used. Hereby continuously (see arrows in Fig. 2 ) to prepare the paint on carriers 3 arranged car bumper 2 a cleaning area 4 and are there cleaned by means of the automatically operated cleaning device 1 in a cleaning process with CO 2 snow 5 (or alternatively CO 2 pellets). Like the enlarged section of the Fig. 1 can be seen, the cleaning device 1 for this purpose a plurality of differently aligned nozzles 6 for uniform application of the CO 2 snow 5 on the vehicle bumper 2. The cleaning device 1 is arranged on a robot arm 7, which is part of a corresponding cleaning robot 8. The cleaning device 1 is also connected to an unillustrated supply system for providing the CO 2 . After the cleaning process, the motor vehicle bumpers 2 enter a painting area 9, which is not shown in detail, and are provided there with at least one layer of paint by means of an automated painting process.

Wie der Fig. 2 zu entnehmen ist, wird zwischen der Reinigung zweier nacheinander den Reinigungsbereich 4 durchlaufender Kfz-Stoßfänger 2 die in einer Reinigungskabine 10 befindliche Reinigungsvorrichtung 1 zwecks Überprüfung des Funktionszustandes derselben in vorgegebenen Zeitabständen aus einer Reinigungsposition 11 in eine Prüfposition 12 verfahren. Die Reinigungsvorrichtung 1 beaufschlagt danach in der Prüfposition 12 im Rahmen eines Prüfungsvorganges einen Testkörper 13 mit Kohlendioxid. Hieran anschließend wird die Reinigungsvorrichtung 1 wieder in ihre Reinigungsposition 11 zurückverfahren und steht für die Reinigung des nächsten ankommenden Kfz-Stoßfängers 2 rechtzeitig wieder zur Verfügung. Über eine automatisierte Auswertung der Beaufschlagung des Testkörpers 12 mit CO2 erfolgt ein Rückschluss auf den Funktionszustand der Reinigungsvorrichtung 1.Again Fig. 2 can be seen, is between the cleaning of two successive the cleaning area 4 continuous vehicle bumper 2 which is located in a cleaning cabin 10 cleaning device 1 for the purpose of checking the functional state of the same at predetermined intervals from a cleaning position 11 moved to a test position 12. The cleaning device 1 then acts in the test position 12 as part of a test procedure, a test body 13 with carbon dioxide. Following this, the cleaning device 1 is moved back into its cleaning position 11 and is available for the cleaning of the next incoming vehicle bumper 2 in good time again. An automated evaluation of the loading of the test body 12 with CO 2 is followed by a conclusion as to the functional state of the cleaning device 1.

Insgesamt bleibt auf diese Weise die automatisierte Reinigung der den Reinigungsbereich 3 kontinuierlich durchlaufenden Kfz-Stoßfänger 2 vom beschriebenen Prüfvorgang vollkommen unbeeinträchtigt.Overall, the automated cleaning of the cleaning area 3 continuously passing through the vehicle bumper 2 of the described test process remains completely unaffected in this way.

Der in Fig. 2 dargestellte Testkörper 13 ist in Fig. 3 näher dargestellt. Man erkennt, dass der Testkörper 13 an mehreren, voneinander beabstandeten Testpositionen 14 Messaufnehmer 15 aufweist, welche zur Bestimmung des Druckes und der Temperatur an der jeweiligen Testposition 14 dienen. Die Messaufnehmer 15 stehen in Wirkverbindung mit einer nicht dargestellten elektronischen Datenverarbeitungseinrichtung, welche die Messwerte der Messaufnehmer 15 mit vorgegebenen Soll-Werten vergleicht.The in Fig. 2 shown test body 13 is in Fig. 3 shown in more detail. It can be seen that the test body 13 has at several, spaced-apart test positions 14 sensors 15, which serve to determine the pressure and the temperature at the respective test position 14. The measuring sensors 15 are in operative connection with an electronic data processing device, not shown, which compares the measured values of the measuring sensors 15 with predetermined desired values.

Wie der Fig. 3 ferner zu entnehmen ist, ist der Testkörper 13 plattenförmig ausgebildet. Der Testkörper 13 weist 18 voneinander beabstandete Testpositionen 14 auf. Die Reinigungsvorrichtung 1 besitzt drei sog. Arrays, welche jeweils über sechs Düsen verfügen. Folglich weist auch die Reinigungsvorrichtung 1 18 Düsen auf. Entsprechend ist jeder Düse 6 der Reinigungsvorrichtung 1 jeweils eine Testposition 14 auf dem Testkörper 13 zugeordnet, welche mit entsprechenden Messaufnehmern 15 ausgerüstet ist. Somit kann für jede einzelne Düse 6 eine Erfassung deren ordnungsgemäßen Funktionszustandes erfolgen. Der Fig. 3 ist ferner zu entnehmen, dass der Testkörper 13 plattenförmig ausgebildet ist. Der Testkörper 13 kann aus Metall, aber auch aus Hartschaumstoff bestehen.Again Fig. 3 can also be seen, the test body 13 is plate-shaped. The test body 13 has 18 spaced-apart test positions 14. The cleaning device 1 has three so-called. Arrays, each having six nozzles. Consequently, the cleaning device 1 has 18 nozzles. Accordingly, each nozzle 6 of the cleaning device 1 is assigned a test position 14 on the test body 13, which is equipped with corresponding sensors 15. Thus, it can be done for each nozzle 6 a detection of their proper functional condition. Of the Fig. 3 It can also be seen that the test body 13 is plate-shaped. The test body 13 may be made of metal, but also of rigid foam.

Claims (9)

  1. Method for painting automotive plastic parts, in particular automotive bumpers,
    - wherein, to prepare for the painting, automotive plastic parts continuously pass through a cleaning area and are cleaned there with CO2, preferably CO2 snow or CO2 pellets, in a cleaning process by means of an automatically operated cleaning device and
    - wherein, after the cleaning process, the automotive plastic parts passing through enter a painting area and are provided there with at least one paint layer by means of an automated painting process,
    characterized in that the cleaning device is moved at specified time intervals from a cleaning position into a testing position,
    a test body is then exposed to CO2 by the cleaning device as part of a testing process,
    and after that the cleaning device is moved back again into a cleaning position and
    by way of an evaluation, preferably an automated evaluation, of the exposure of the test body to CO2, a conclusion about the functional state of the cleaning device is made in such a way that the automated cleaning of the automotive plastic parts continuously passing through the cleaning area remains at least substantially unaffected overall by the testing process.
  2. Method according to Claim 1, characterized in that the cleaning device is arranged on a robot arm.
  3. Method according to Claim 1 or 2, characterized in that the test body has measuring transducers, in particular for pressure and/or temperature and/or force, at a number of testing positions that are arranged at a distance from one another.
  4. Method according to Claim 3, characterized in that the measuring transducers are in operative connection with an electronic data processing device, which compares the measured values of the measuring transducers with predetermined setpoint values.
  5. Method according to one of Claims 1 to 4, characterized in that the test body takes the form of a plate.
  6. Method according to one of Claims 1 to 5, characterized in that the exposure of the test body is evaluated photooptically.
  7. Method according to one of Claims 1 to 6, characterized in that the test body consists of metal or a rigid foam, preferably a rigid polystyrene foam.
  8. Method according to one of Claims 1 to 7, characterized in that the testing process is performed between the cleaning of two successive automotive plastic parts.
  9. Method according to one of Claims 1 to 8, characterized in that the cleaning device has a number of preferably differently aligned nozzles for the uniform exposure of the automotive plastic part to CO2.
EP13718106.1A 2012-04-05 2013-03-27 Method for painting automotive plastic parts, in particular automotive bumpers Active EP2834039B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012102984A DE102012102984A1 (en) 2012-04-05 2012-04-05 Process for painting automotive plastic components, in particular motor vehicle bumpers
PCT/EP2013/000927 WO2013149713A1 (en) 2012-04-05 2013-03-27 Method for painting automotive plastic parts, in particular automotive bumpers

Publications (2)

Publication Number Publication Date
EP2834039A1 EP2834039A1 (en) 2015-02-11
EP2834039B1 true EP2834039B1 (en) 2015-10-28

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EP13718106.1A Active EP2834039B1 (en) 2012-04-05 2013-03-27 Method for painting automotive plastic parts, in particular automotive bumpers

Country Status (5)

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EP (1) EP2834039B1 (en)
DE (1) DE102012102984A1 (en)
HU (1) HUE027414T2 (en)
WO (1) WO2013149713A1 (en)
ZA (1) ZA201406043B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219430A1 (en) 2015-10-07 2017-04-13 Bayerische Motoren Werke Aktiengesellschaft Device for cleaning adhesive surfaces
DE102015219429A1 (en) * 2015-10-07 2017-04-13 Bayerische Motoren Werke Aktiengesellschaft Process for cleaning with solid carbon dioxide
DE102016100243A1 (en) 2016-01-08 2017-07-13 Rehau Ag + Co. Method for painting automotive plastic components
DE102021113119B3 (en) 2021-05-20 2022-07-21 Bayerische Motoren Werke Aktiengesellschaft Method for the automated testing of at least one washing lance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244919A1 (en) * 1982-12-04 1984-06-07 Dürr Anlagenbau GmbH, 7000 Stuttgart Process and device for checking the operating capacity of a cleaning appliance
DE102007027618A1 (en) 2007-06-12 2008-12-18 Rehau Ag + Co Process for the pretreatment of polymeric surfaces to be painted

Also Published As

Publication number Publication date
DE102012102984A1 (en) 2013-10-10
EP2834039A1 (en) 2015-02-11
HUE027414T2 (en) 2016-10-28
WO2013149713A1 (en) 2013-10-10
ZA201406043B (en) 2015-10-28

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