EP1762802A2 - Procédé pour sécher une couche de vernis appliquée sur une partie d'un véhicule automobile, et système de séchage correspondant - Google Patents

Procédé pour sécher une couche de vernis appliquée sur une partie d'un véhicule automobile, et système de séchage correspondant Download PDF

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Publication number
EP1762802A2
EP1762802A2 EP06016182A EP06016182A EP1762802A2 EP 1762802 A2 EP1762802 A2 EP 1762802A2 EP 06016182 A EP06016182 A EP 06016182A EP 06016182 A EP06016182 A EP 06016182A EP 1762802 A2 EP1762802 A2 EP 1762802A2
Authority
EP
European Patent Office
Prior art keywords
drying
paint
motor vehicle
data
vehicle component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06016182A
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German (de)
English (en)
Other versions
EP1762802B1 (fr
EP1762802A3 (fr
Inventor
Peter Krauss
Helmut Ansorge
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP1762802A2 publication Critical patent/EP1762802A2/fr
Publication of EP1762802A3 publication Critical patent/EP1762802A3/fr
Application granted granted Critical
Publication of EP1762802B1 publication Critical patent/EP1762802B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the invention relates to a method for drying a paint layer applied to a motor vehicle component. Furthermore, the invention relates to a drying system for carrying out such a drying process.
  • a drying process and a drying plant therefor as part of the drying system of the type mentioned are known by public prior use. Motor vehicle components are painted in different colors and with different paints, some with effect paints.
  • the known drying method and the drying system for this have drying times that are not tolerable in the interest of a high throughput through the drying system.
  • the different drying behavior of different lacquers can be reproducibly assigned lacquer data and lacquer parameters which can be determined or measured before the actual drying.
  • the drying behavior of a coated paint can, if these data or parameters are known, predetermine within narrow limits. It is therefore possible to specify a drying process which is tailor-made for this drying behavior. Each coating application can then be dried optimally fast. This leads to a high throughput in the application of the drying method according to the invention.
  • the additional inclusion of at least one solvent characteristic according to claim 2 improves the fineness in the predetermination of the drying behavior.
  • the solvent content and the type of solvent are examples of such a solvent characteristic.
  • An additional air drying according to claim 3 increases the drying efficiency again, since the formation of solvent and / or steam vapor on the surface of the component to be dried, which undesirably weaken the drying radiation, is prevented by these solvent and / or steam vapor by the introduced - in particular dehumidified - drying air is absorbed and thereby removed from the surface of the component to be dried.
  • the drying air is, in particular, dried, heated air which is able to absorb the swaths intensively. Depending on the composition of the paint, this has a different tendency to form troublesome swaths.
  • the paint-dependent drying air control leads to a further increase in the drying efficiency, since it is specifically prevented that a high proportion of dry radiation energy is absorbed by the solvent and / or water vapor swaths and thus can not be fed to the drying of the lacquer layer.
  • a layer thickness monitoring according to claim 4 enables a fine correction of the control values.
  • Monitoring method according to claims 5 to 7 prevent the process control leaves defined parameter limits. In addition to pure warning, a corrective intervention in the drying control values can also take place.
  • a paint data assignment according to claim 8 leads to the possibility of automatic paint data acquisition during transport of the components to be painted and dried.
  • a skid according to claim 9 is suitable for use in the drying plant.
  • Another object of the invention is to provide a drying system in which the component throughput is increased compared to known systems.
  • the advantages of this drying system correspond to those described above with reference to claims 1 to 10.
  • the drying system of the drying system for carrying out the method according to claim 4 also includes an integrated paint layer thickness measuring device with which the layer thickness monitoring during drying, so online, is possible.
  • the drying system for the drying system for carrying out the method according to claim 6 includes a surface temperature measuring device, preferably a long-wave working pyrometer. A thermal imaging camera can also be used.
  • the drying system for carrying out the method according to claim 8 comprises a reading device for reading the machine-readable data carrier.
  • the drying system for carrying out the method according to claim 9 includes a skid transport system.
  • the drying plant for carrying out the drying process according to claim 10 additionally has a rotating device, which cooperates with the transport system for component carrier transport.
  • the predefined control values may also include the air temperature of the drying air of the air drying blower, which is then preferably set via an air conditioning unit.
  • a designated in the drawing as a total of 1 drying plant is arranged downstream of a paint shop, not shown in the drawing and part of an otherwise not shown drying system.
  • two rows of motor vehicle components 2, for example bumpers, are transported one above the other along two storage layers of skid transport systems arranged one above the other along a transport direction 3a.
  • the transport direction 3a is perpendicular to the sectional plane of FIG. 1.
  • the skid transport system is not shown in the highly schematic representation of FIGS. 1 and 2.
  • An inner chamber 3 of the drying installation 1 is delimited upward by a fan cover wall 4 and perpendicular to the transport direction 3a on both sides by two fan side walls 5.
  • air conditioning units 6 are arranged, which are in communication with a fan guide in the fan top wall 4 and in the fan side walls 5.
  • a plurality of infrared (IR) radiators are arranged as radiator strips parallel to the transport direction 3a.
  • Two first groups of four IR emitters 7 are arranged in Fig. 1 right and left of the lower transport path of the transport system and mounted on the inner sides of the fan side walls 5.
  • a second group of IR radiators 8 is arranged in Fig. 1 right and left of the upper transport path of the transport system and mounted on the inner sides of the fan side walls 5.
  • Two further IR radiators 9, which form a third group, are arranged in the two upper corner regions of the inner chamber 3, which are formed where the upper sections of the fan side walls 5 are attached to the fan top wall 4.
  • the IR emitters 9 are spaced both from the top wall 4 and from the side walls 5.
  • Two further IR emitters 10 form a fourth group and are arranged between the two transport paths of the transport system.
  • the IR emitters 10 are spaced from the side walls 5 as far as the IR emitter 9.
  • Two further IR emitters 11 form a fifth group of IR emitters and are arranged below the lower transport path of the transport system.
  • the distance of the IR emitter 11 from the side walls 5 corresponds to the lateral distance of the IR emitters 9 and 10. From a bottom wall 12 of the drying system 1, the IR emitters 11 are also spaced.
  • the IR emitters 7, 10 and 11 irradiate the components with IR radiation 13, which are conveyed on the lower transport path of the skid transport system.
  • the IR emitters 8, 9 and 10 irradiate the components with IR radiation 13, which are conveyed on the upper transport path of the skid transport system.
  • the typical distance of the IR emitters 7 to 11 from the surface of the motor vehicle components 2 is between 100 and 300 mm.
  • the fan air 14 flows between the IR emitters 7 to 11 through or past this.
  • the drying plant 1 is divided into two IR zones 15, 16.
  • the first IR zone 15 covers about two thirds of the transport path of the motor vehicle components 2 through the drying plant 1 and the second IR zone 16 covers in the connection thereto about one third of this transport path.
  • the radiator strips of the IR radiators 7 to 11 are divided, so that a separate control of the IR radiators 7 to 11 in the first IR zone 15 on the one hand and in the second IR zone 16 on the other hand is possible.
  • the paint drying of the drying plant 1 is integrated into an overall process as described below: First, it is selected with which waterborne or solventborne paints in which specified composition and quantity the motor vehicle components 2 to be painted are to be coated.
  • Corresponding paint data are retrieved from a database in which these paint data are collected.
  • These paint data include the following paint characteristics: The color-specific target lacquer layer thickness, ie the layer thickness which the dried lacquer is to have later on the component, the color-specific reflection value, ie the energy component of the IR radiation impinging on the lacquer, which is reflected back from the lacquer, ie does not contribute to the drying, the maximum permissible for this paint surface temperature of the motor vehicle component 2 as well as the substrate material of the motor vehicle component 2 dependent limits.
  • the target layer thicknesses are between 10 and 20 ⁇ m, depending on whether it is a primer or a basecoat and depending on the paint color.
  • the paint is further characterized in the database by its chemical definition, its solids content, its proportion of organic solvents and its water content. In the stored reflection value is in addition to the color information, whether it is a paint containing metal or interference pigments.
  • lacquer data which characterize the absorption and / or reflection behavior of the lacquer to be applied, in particular contain a lacquer characteristic value characterizing the absorption and / or reflection behavior, are then conveyed to a body part carrier which transports the plastic component 2 to be lacquered, namely the skid. assigned.
  • the skid carries him a unique individualizing identifier, for example, a serial number, with the help of the paint data, ie stored in the database, color-specific parameters for transported on the skid, to be painted component, the skid assigned with the help of the control computer become.
  • the identifier of the skid is housed on a machine-readable medium which is mounted on the skid.
  • the assigned data also includes, in particular, the geometry of the motor vehicle component 2 to be painted. Subsequently, the motor vehicle components 2 in the paint shop are coated with the corresponding paint. Here, depending on the hiding power of the paint, a different paint layer thickness is applied.
  • the motor vehicle components are transported on the skids in a evaporation zone.
  • the components 2 stay about two to four minutes. There prevails an air temperature between 23 and 40 ° C and a relative humidity of 55 to 70%.
  • an air flow with an air velocity between 0.2 and 1 m / s is provided.
  • the motor vehicle components 2 on the skids are continuously conveyed through the evaporation zone.
  • portions of the organic and aqueous solvents volatilize. This will prepare the paint film for subsequent drying.
  • the components 2 are conveyed on the skids continuously through the drying plant 1.
  • the current layer thickness of the coating layer applied to the component 2 is measured without contact, for example by means of a pulsed photothermal process.
  • a measuring method is known per se by obvious prior use. In principle, it is possible to use a likewise known eddy current measuring method for non-contact coating thickness measurement.
  • an unillustrated control computer of the drying installation 1 calculates control values for the time profile of the power of the IR radiators 7 to 11, for the time course of the fan power of the fan cover wall 4 and of the blower Side wall 5, for the fan temperature and for the time course of the transport speed of the skids through the drying unit 1.
  • a more reflective coating with a large actual layer thickness for example, a higher drying performance must be provided as in more absorbent or thinner applied paint layers.
  • the paint and base material-dependent limit parameters for example for the maximum surface temperature, must also be taken into account.
  • the central computer first predetermines desired curves with regard to the time profile of the temperature of the air in the inner chamber 3, the air humidity of the air in the inner chamber 3 and the velocity of the air flow in the inner chamber 3.
  • desired curves control values for the radiator output of the IR radiators 7 to 11 as well as for the blower air 14 of the blower cover wall 4 and of the blower side walls 5 are calculated.
  • a calculation of the time profile of the transport speed by the drying installation 1 takes place.
  • the skid with the motor vehicle component 2 is transported through the drying installation 1, whereby the IR radiators 7 to 11, the blowers and the skid Transport system are driven by the calculated control values.
  • the radiation powers are predetermined independently of each other. In the second IR zone 16, the IR radiation power is generally reduced compared to the radiation power in the first IR zone 15.
  • the blower air 14 ensures that evaporating solvent or water vapor does not undesirably absorb the IR radiation 13 over the surface of the motor vehicle components 2 to be dried. In this way, a finely adjusted to the respective paint of the component and thus highly efficient drying.
  • At least one solvent parameter which characterizes the solvent of the applied lacquer, is included in the calculation of the control value.
  • solvent parameters which characterizes the solvent of the applied lacquer.
  • the instantaneous coating layer thickness is monitored on the motor vehicle component 2 to be dried. From this conclusions about the temporal course of the drying are drawn. In particular, it is checked whether this time course coincides with a desired layer thickness profile, which is to be expected on the basis of the drying control specifications. Too large a deviation of the coating thickness measured online during drying from the target strength specification results in a warning signal. Such a warning signal is output in each case, provided that the current measured coating layer thickness measured online is less than the final target paint layer thickness. A deviation of the paint thickness measured online from the specified paint thickness desired course can also be used to fine-tune the control values for the IR radiators on the one hand and the forced air on the other hand.
  • the surface temperature of the paint layer applied to the respective motor vehicle component 2 is also monitored without contact, for example with a pyrometer operating at long wavelength. As soon as the surface temperature measured online is greater than the specified limit value for the surface temperature, a warning is also issued. Even if the surface temperature measured online is lower than a setpoint that is to be expected based on the drying specification, a warning signal is output because this is an indication of a process error.
  • the air temperature and the humidity in the inner chamber 3 are continuously detected with appropriate measuring instruments.
  • the motor vehicle components 2 can be rotated in the drying installation 1 during the drying process.
  • the component is lifted by means of a known turning device together with this skid transporting component of a conveyor chain of the skid transport system, rotated 180 ° about the component vertical axis (see axis 17 in Fig. 1) and then back to the Attached conveyor chain. In this way, there is a symmetrization of the drying process in the drying plant 1 during transport through them.
  • the passage of a motor vehicle component 2 to be dried by the drying plant 1 takes depending on the specification between four and six minutes. Depending on the requirements, an air temperature between 50 and 80 ° C, an absolute humidity, which is lower than 10 g / kg, an air flow of 0.2 to 1 m / s and an IR-radiation power 5-20 kW / m 2 set. Typical values of the surface temperature which occurs during drying in the drying installation 1 are between 23 and 80 ° C.
  • the motor vehicle components 2 After drying, the motor vehicle components 2 leave the drying plant 1 and are cooled to room temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
EP06016182A 2005-09-10 2006-08-03 Procédé pour sécher une couche de vernis appliquée sur une partie d'un véhicule automobile, et système de séchage correspondant Active EP1762802B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005043075A DE102005043075A1 (de) 2005-09-10 2005-09-10 Verfahren zur Trocknung einer auf einem Kraftfahrzeug-Bauteil aufgebrachten Lackschicht sowie Trocknungssystem hierfür

Publications (3)

Publication Number Publication Date
EP1762802A2 true EP1762802A2 (fr) 2007-03-14
EP1762802A3 EP1762802A3 (fr) 2009-11-04
EP1762802B1 EP1762802B1 (fr) 2010-12-15

Family

ID=37441231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06016182A Active EP1762802B1 (fr) 2005-09-10 2006-08-03 Procédé pour sécher une couche de vernis appliquée sur une partie d'un véhicule automobile, et système de séchage correspondant

Country Status (4)

Country Link
EP (1) EP1762802B1 (fr)
AT (1) ATE491921T1 (fr)
DE (2) DE102005043075A1 (fr)
ES (1) ES2358040T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060863A1 (fr) 2007-11-15 2009-05-20 Mazda Motor Corporation Méthode de séchage de film de revêtement et appareil de séchage de film de revêtement
EP2161523A2 (fr) * 2008-09-09 2010-03-10 Wolf Verwaltungs GmbH & Co. KG Cabine de séchage
WO2010122121A3 (fr) * 2009-04-24 2011-03-03 Dürr Systems GmbH Dispositif de séchage et/ou de durcissage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046492B4 (de) * 2008-09-09 2011-06-16 Wolf Verwaltungs Gmbh & Co. Kg System zur Steuerung der Kabineninnentemperatur in einer Trocknungs- und/oder Lackier-Kabine
DE102019101522A1 (de) * 2019-01-22 2020-07-23 Koenig & Bauer Ag Verfahren zum Beschichten eines bahnförmigen Substrats sowie Vorrichtung zur Durchführung des Verfahrens

Citations (4)

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Publication number Priority date Publication date Assignee Title
EP0647478A1 (fr) 1993-09-30 1995-04-12 Mazda Motor Corporation Procédé de vernissage, appareil à vernir et produit verni
DE19756467A1 (de) 1997-12-18 1999-07-01 Abb Research Ltd Verfahren und Vorrichtung zur Regelung der Qualität von Lackschichten
DE10106889A1 (de) 2001-02-14 2002-10-02 Advanced Photonics Tech Ag Verfahren und Vorrichtung zur Gelatinetrocknung mittels NIR-Strahlung
US6484121B1 (en) 2000-09-07 2002-11-19 Ford Global Technologies, Inc. System for automatically measuring paint film thickness

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DE3430024A1 (de) * 1984-08-16 1986-02-27 Werner & Pfleiderer, 7000 Stuttgart Durchlauf-tunnelofen zum trocknen lackierter gegenstaende
DE3608902A1 (de) * 1986-03-17 1987-09-24 Brueckner Trockentechnik Gmbh Verfahren zur waermebehandlung einer warenbahn in einer spannmaschine
DE19719483A1 (de) * 1997-05-07 1998-11-12 Motan Holding Gmbh Trocknungsanlage
EP1242779B1 (fr) * 1999-04-21 2005-06-01 Junair Group Limited Systeme de sechage de peinture
DE19945291B4 (de) * 1999-09-22 2006-07-20 Eisenmann Maschinenbau Gmbh & Co. Kg Lackieranlage zum Lackieren von Kunststoff-Gegenständen
DE10109847A1 (de) * 2001-03-01 2002-09-19 Adphos Advanced Photonics Tech Verfahren zum Erzeugen einer Beschichtung auf einem quasi-endlos geförderten Materialband
DE10131620B4 (de) * 2001-06-29 2007-10-25 Adphos Advanced Photonics Technologies Ag Verfahren und Vorrichtung zum Trocknen und/oder Vernetzen oder Erwärmen mittels elektromagnetischer Strahlung
AU2002308228A1 (en) * 2002-03-01 2003-09-16 Advanced Photonics Technologies Ag Method and device for the production of a surface coating by means of nir and uv aftertreatment
DE20221980U1 (de) * 2002-09-26 2009-12-17 Advanced Photonics Technologies Ag Anordnung zur thermischen Behandlung eines Werkstücks
DE10326191B3 (de) * 2003-06-06 2005-02-03 Daimlerchrysler Ag Trocknung von lackierten Oberflächen
EP1651359A2 (fr) * 2003-07-24 2006-05-03 EISENMANN Maschinenbau GmbH & Co. KG Dispositif pour faire durcir un revetement, constitue d'un materiau durcissant par rayonnement electromagnetique, notamment d'une peinture uv ou d'une peinture a durcissement thermique, d'un objet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647478A1 (fr) 1993-09-30 1995-04-12 Mazda Motor Corporation Procédé de vernissage, appareil à vernir et produit verni
DE19756467A1 (de) 1997-12-18 1999-07-01 Abb Research Ltd Verfahren und Vorrichtung zur Regelung der Qualität von Lackschichten
US6484121B1 (en) 2000-09-07 2002-11-19 Ford Global Technologies, Inc. System for automatically measuring paint film thickness
DE10106889A1 (de) 2001-02-14 2002-10-02 Advanced Photonics Tech Ag Verfahren und Vorrichtung zur Gelatinetrocknung mittels NIR-Strahlung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060863A1 (fr) 2007-11-15 2009-05-20 Mazda Motor Corporation Méthode de séchage de film de revêtement et appareil de séchage de film de revêtement
EP2161523A2 (fr) * 2008-09-09 2010-03-10 Wolf Verwaltungs GmbH & Co. KG Cabine de séchage
EP2161523A3 (fr) * 2008-09-09 2014-05-21 Wolf Verwaltungs GmbH & Co. KG Cabine de séchage
WO2010122121A3 (fr) * 2009-04-24 2011-03-03 Dürr Systems GmbH Dispositif de séchage et/ou de durcissage
EP2422153B1 (fr) 2009-04-24 2018-10-24 Dürr Systems AG Dispositif de séchage et/ou de durcissage

Also Published As

Publication number Publication date
DE502006008494D1 (de) 2011-01-27
EP1762802B1 (fr) 2010-12-15
EP1762802A3 (fr) 2009-11-04
DE102005043075A1 (de) 2007-03-15
ATE491921T1 (de) 2011-01-15
ES2358040T3 (es) 2011-05-05

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