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EP2064372B1 - Procédé de revêtement électrophorétique de pièces à usiner et installation de revêtement - Google Patents

Procédé de revêtement électrophorétique de pièces à usiner et installation de revêtement Download PDF

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Publication number
EP2064372B1
EP2064372B1 EP07786409.8A EP07786409A EP2064372B1 EP 2064372 B1 EP2064372 B1 EP 2064372B1 EP 07786409 A EP07786409 A EP 07786409A EP 2064372 B1 EP2064372 B1 EP 2064372B1
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EP
European Patent Office
Prior art keywords
coating
voltage
workpiece
workpieces
direct current
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EP07786409.8A
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German (de)
English (en)
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EP2064372A2 (fr
Inventor
Jürgen SCHLECHT
Zoltan-Josef Horvath
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Eisenmann GmbH
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Eisenmann SE
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/18—Electrophoretic coating characterised by the process using modulated, pulsed, or reversing current

Definitions

  • the invention relates to a method for the electrophoretic coating of workpieces with a coating medium, in particular lacquer, in which at least one workpiece is immersed in the coating medium, applied with a voltage source a DC voltage between the workpiece and at least one immersed in the coating medium electrode and the DC voltage during the Electrophoresis is increased.
  • the invention relates to a coating system for electrophoretic coating of workpieces with a coating medium, in particular paint, with a bath container in which the at least one workpiece is immersed, with a voltage source for applying a variable DC voltage between the workpiece and at least one electrode in the bath tank.
  • a coating system for electrophoretic coating of workpieces with a coating medium, in particular paint with a bath container in which the at least one workpiece is immersed, with a voltage source for applying a variable DC voltage between the workpiece and at least one electrode in the bath tank.
  • the voltage is then kept constant in a first exemplary embodiment in each case at the value of the coating voltage or, in a second exemplary embodiment, is increased stepwise.
  • the coating of the workpieces acts as an insulating layer on their surface.
  • the thickness of the insulating layer increases with the coating time.
  • the coating speed is dependent on the conductivity of the workpiece surface and thus the current density initially very large. It decreases exponentially with the coating time due to the increasing thickness of the insulating layer until a saturation occurs or the circuit is interrupted.
  • the increasing insulating layer thickness therefore leads to a significant extension of the total coating time.
  • the method of current density constant maintenance is known from other known continuous flow coating plant.
  • the voltage is readjusted as a function of the immersed surface of the workpiece.
  • the workpieces are intermittently immersed in an area of the bath and held there. For the duration of the immersion, a substantially constant voltage is applied between the immersed workpiece and at least one electrode in the bath with a voltage source.
  • a substantially constant voltage is applied between the immersed workpiece and at least one electrode in the bath with a voltage source.
  • longer cycle times for the coating are predetermined here, whereby the entire coating process is considerably prolonged.
  • a method and a system of the type mentioned is from the US 3,855,106 known.
  • the voltage is first increased to a threshold voltage. This is accompanied by an increase in the current density up to a maximum value, in order then to decrease again as a consequence of an increasing electrical resistance with increasing layer thickness, until a predetermined nominal value for the current density has been reached.
  • the current density is kept constant by increasing the voltage, even above the threshold voltage.
  • the bus bars are electrically divided into several segments, wherein the first segment is at a lower voltage and the subsequent segments are held at higher voltages, which corresponds to the size of just to be coated there workpiece, the Coating current is monitored such that the layer thickness achieved is independent of the size of the workpiece.
  • the object of the present invention is to design a method and a coating system of the type mentioned above, with which the workpieces can be provided as simply as possible with a high-quality coating, in particular with a predefinable layer density and a predeterminable layer thickness.
  • This object is achieved in the method according to the invention in that the DC voltage is continuously increased substantially continuously during virtually the entire coating time such that the coating current density at the workpiece surface remains substantially constant over time.
  • a reduction in the conductivity of the workpiece surface is achieved during the entire coating period due to the increase in the thickness of the coating with a continuous enlargement counteracted the voltage, so that the flow and the flow of the media particles, which are understood here by particles both suspended and dispersed particles, and thus the coating speed over the coating time remain almost constant.
  • a controlled homogeneous application of the media particles to the workpiece surface preferably with a predetermined density and layer thickness, is achieved almost during the entire coating time. Since the layer thickness is proportional to the supplied electric charge depending on the coating medium, it can be easily determined.
  • the controlled continuous increase in voltage does not result in any current peaks, so that the voltage source and any contacts, in particular sliding contacts, when using a continuous-flow system are loaded less and smaller rectifiers can be used.
  • the risk of voltage flashovers is reduced by sparking.
  • the achieved almost constant time course of current also leads to a decrease in harmonics when using AC voltage to supply the voltage source.
  • a significantly better active power factor can be achieved since the nearly constant current characteristic reduces idle times of the voltage source.
  • the dipping areas can be made shorter, with shorter coating times the same layer thicknesses as in the known from the prior art continuous systems to reach. Accordingly, when using clock systems, the cycle times can be correspondingly shorter.
  • the voltage can be increased up to a limit voltage, which is predetermined in particular depending on the coating medium.
  • a multiplicity of workpieces can be conveyed simultaneously in the bath of a continuous coating installation, and the voltage source can be used to provide the same temporal voltage progression for each workpiece with a time shift.
  • the advantages of the continuous coating machine and the advantages of the invention can be combined, so that a plurality of workpieces can be continuously and quickly provided each with a high quality coating.
  • the workpieces can also be immersed in cycles in a bath of a tact coater.
  • a DC voltage can be generated from an input AC voltage with a single rectifier and from this DC voltage by means of at least one electronic circuit controlled by a control unit of the coating system the variable DC voltage (s) applied to the workpiece is (are) generated.
  • the coating medium may in particular be lacquer.
  • the coating system according to the invention is characterized in that the voltage source has at least one electronic circuit with which it can be controlled such that it emits a continuously substantially continuously variable DC voltage over virtually the entire coating duration, such that the coating current density at the workpiece surface is substantially in time remains constant. In this way, a reduction in the conductivity of the workpiece surface during almost the entire coating time can be optimally compensated.
  • This embodiment is used in particular where the workpieces to be coated are not at ground potential. In Europe, where by convention the negative pole is at ground potential, these are anaphoretic coating processes.
  • This embodiment is used in particular where the workpieces to be coated are at ground potential, ie in Europe in cataphoretic coating processes.
  • the advantage of this embodiment is that when passing through the workpieces no galvanic transitions are required in which voltage flashovers could be caused by sparking.
  • the coating installation may be a clock coating installation, which has a smaller footprint than a continuous coating plant.
  • the voltage source may comprise a single rectifier and at least one controllable electronic circuit connected downstream thereof which can generate a DC voltage of continuously variable size from the voltage delivered by the rectifier.
  • the voltage source can be easily realized with just a few components.
  • the electronic circuit may be an IGBT circuit, which is particularly easy to implement and suitable for large voltages and currents. Another advantage is the low demand for control power, the insulation of the gate connection from the load circuit and the low on-resistance.
  • the coating system can be designed in particular for coating with paint.
  • FIG. 1 illustrated embodiment of an electrophoretic fürlauftauchlackierstrom the different workpieces to be painted are not grounded and can therefore be brought to different and time-varying potential.
  • the negative pole of a DC voltage source is grounded.
  • the system is the FIG. 1 for cataphoretic operation. It is used in particular for pre-painting of not shown workpieces in a continuous dipping process. It comprises a dip tank 12 shown in vertical section, which is filled up to a certain level with a corresponding coating liquid.
  • the workpieces to be painted are introduced in the direction of arrow 14 by means of a suitable conveyor system, not shown, to the dip tank 12, then immersed in a first area in the coating liquid, moved through the coating liquid, lifted out of the paint liquid in the end of the dip tank 12 and then in Diverted arrow 16 for further treatment.
  • a multiplicity of cathodes 18 immersed in the coating liquid which are connected to the earthed negative pole of a regulated rectifier 20, are immersed.
  • an input AC voltage in the order of about 450 V at.
  • a busbar assembly 22 which preferably extends above the mirror of the paint liquid and is divided into four segments 22a, 22b, 22c and 22d.
  • Each workpiece can be connected in succession with the segments 22a, 22b, 22c and 22d via a galvanic contact during conveyance.
  • the distance of the workpieces is sufficiently large, so that never two of the workpieces at the same time are connected to the same segment 22a, 22b, 22c and 22d, respectively.
  • a workpiece and its galvanic contact together with the cathodes 18 each form an electrode device.
  • Each segment 22a, 22b, 22c and 22d is connected to the positive pole of the controlled rectifier 20 via a respective controllable semiconductor switch 24a, 24b, 24c and 24d, in the present case an IGBT circuit.
  • a coating DC voltage U (T) at the corresponding segments 22a, 22b, 22c and 22d is adjustable.
  • the semiconductor switches 24a, 24b, 24c and 24d in turn each comprise a controllable power transistor 26 and a logic circuit 28 driving the same.
  • FIG. 1 left shown in detail.
  • the semiconductor switches 24b, 24c and 24d of the further segments 22b, 22c, 22d correspond to the first one.
  • control program for the power transistor 26 is stored, which is then set in motion when at an input 30 of the semiconductor switch 24a or an input, not shown, the semiconductor switches 24b, 24c and 24d arrives a start signal.
  • Each semiconductor switch 24a, 24b, 24c and 24d and the conveyor are connected to a central control unit, not shown, with which the delivery process and the Control program can be coordinated in the manner explained below.
  • the central control unit may be a programmable controller (PLC) or a PC.
  • the dip coating system 10 described above operates as follows: First, the passage of a single workpiece is considered. Shortly before the workpiece enters the plunge pool 12, the power transistor 26 of the semiconductor switch 24a is blocked for the first segment 22a, so that therefore the first segment 22a of the busbar arrangement 22 is de-energized. The further segments 22b, 22c and 22d may also be de-energized at this time.
  • the approaching in the direction of arrow 14 workpiece is detected at the inlet of the dip tank 12 by an inlet sensor 32. This gives the start signal to the input 30 of the semiconductor switch 24a of the first segment 22a, so that the logic begins with the execution of the stored program.
  • the workpiece is now galvanically connected to the first segment 22a of the busbar assembly 22, which is still at zero potential.
  • the logic circuit 28 generates now with a certain repetition frequency of eg 500 Hertz pulse width modulated voltage pulses, which during its duration the Open power transistor 26.
  • a certain repetition frequency eg 500 Hertz pulse width modulated voltage pulses, which during its duration the Open power transistor 26.
  • the duration of these pulses is still very low, but increases continuously, though not necessarily linearly, during the passage of the first segment 22a. Accordingly, the mean coating DC voltage U (T) to which the workpiece is exposed during its movement increases along the first segment 22a.
  • the time profile of the coating DC voltage U (T) for the entire coating process is in FIG. 2 and is explained in more detail below.
  • a presence sensor 34 is arranged shortly before reaching the end of the first segment 22a, which is connected via the semiconductor switch 24a to the central control unit.
  • the workpiece enters the detection area of the presence sensor 34, it generates a signal which starts the program of the logic circuit 28 of the semiconductor switch 24b, the second segment 22b and causes the central control unit to apply the same to the second segment 22b, independently of the semiconductor switch 24a of the first segment 22a To bring potential like the first segment 22a.
  • the coating voltage U (T) at the end of the first segment 22a is thus passed on in controllable size to the second segment 22b.
  • the transition from the second segment 22b to the third segment 22c and from the third segment 22c to the fourth segment 22d is monitored by corresponding, not shown further presence sensors analog.
  • the programs of the second semiconductor switch 24b and of the third semiconductor switch 24c are processed analogously to that of the first semiconductor switch 24a and the coating DC voltage U (T) is continuously increased when passing through the second segment 22b and the third segment 22c.
  • the workpiece is further coated with varnish.
  • the entry into the fourth segment 22d is analogous to that in the previous segments 22b and 22c. However, shortly before the end of the fourth segment 22d, from reaching a limit voltage U G , the coating DC voltage U (T) kept constant to prevent the paint from coagulating.
  • the coating voltage along the four segments 22a to 22d as a whole causes the coating DC voltage U (T), whose time course in the FIG. 2 is shown and which has no steps at the transitions between the segments 22a, 22b, 22c and 22d.
  • the time profile of the coating DC voltage U (T) and a coating current I (T) in Tauchlakkierstrom 10 when passing through all four segments 22a, 22b, 22c and 22d, as already mentioned, in FIG. 2 schematically illustrated by an amplitude-time diagram.
  • the course of the coating DC voltage U (T) is in the FIG. 2 dashed line above and the coating stream I (T) underneath shown as a solid line.
  • the amplitudes are plotted on the vertical axis of the diagram and the coating time T on the horizontal axis.
  • the inlet sensor 32 indicates to the semiconductor switches 24a of the first segment 22a of the immersion of the workpiece in the bath is at a time t 0, in the FIG. 2 left, with the semiconductor switch 24a to the first segment 22a a minimum initial coating DC voltage U A applied. Because of the initially high conductivity the still uncoated workpiece surface of the initial coating DC voltage U A immediately follows a strong increase of the coating current I (T) to a value I B. The current I (T) causes the desired uniform and rapid coating of the workpiece surface.
  • the coating DC voltage U (T) is increased approximately in the form of an exponential function when passing through the four segments 22a to 22d with the respective semiconductor switches 24a, 24b, 24c and 24d such that the coating current I (T) and thus the coating speed also remain almost constant with increasing layer thickness, ie decreasing conductivity of the workpiece surface.
  • a continuous busbar arrangement could be brought to the varying DC coating voltage U (T) by a single controllable semiconductor switch during the passage of the workpiece, as in FIG. 2 shown.
  • the advantage of the segmentation is that a plurality of workpieces can be treated simultaneously in the Tauchlakkierstrom 10. In each segment 22a, 22b, 22c and 22d there may be only one workpiece.
  • each segment 22a, 22b, 22c, 22d thus covers a certain voltage range of in FIG. 2 shown coating DC voltage U (T) from.
  • the temporal stress curve is the same for all workpieces with respect to the respective beginning of the coating; the respective start of coating for a workpiece is shifted in time relative to the beginning of the coating of the workpiece previously conveyed in the dipping area.
  • the voltage source which includes the semiconductor switches 24a, 24b, 24c and 24d and the regulated rectifier 20, so the deposition of a paint film between each workpiece and the cathodes 18 in the bath, the respectively required coating DC voltage U (T) with the in FIG. 2 displayed course are created.
  • a second embodiment of a fürlauftauchlackierstrom 110 for cataphoretic dip painting shown in FIG. 3 , are those elements that are among those in the FIGS. 1 and 2 described flow coating unit 10 are provided with the same reference numerals plus 100, so that with respect to the description of the above statements reference is made.
  • the Cataphoretic Continuous Dip Painting System 110 of the FIG. 3 differs from the fürlauftauchlackierstrom 10 of FIG. 1 in that the workpieces are all at ground, that is to say at the same, temporally constant potential. For a plant according to European convention, this means that the plant of the FIG. 3 works cataphoretically in the manner described below.
  • a continuous, continuous bus bar 122 may be used with which each workpiece 170 is electrically connected via a suspension 150 during conveyance.
  • the bus bar 122 is connected via a terminal 135 to the negative terminal of the controlled rectifier 120.
  • Each of the anodes 118 is connected to the positive pole of the controlled rectifier 120 separately via a blocking diode 125a, 125b, 125c, and 125d, respectively, and the semiconductor switches 124a, 124b, 124c, and 124d, respectively.
  • a presence sensor 134 is arranged, which is connected to the semiconductor switches 124a, 124b, 124c and 124d of the anode 118 corresponding to it.
  • the lines between the presence sensors 134 and the respective semiconductor switches 124a, 124b, 124c and 124d are in FIG. 3 for the sake of clarity not shown.
  • the anodes 118 may each be surrounded in a known manner by a membrane which forms a dialysis cell.
  • the cataphoretic continuous dip coating system 110 functions analogously to the anaphoretic continuous dip coating system 10 according to FIG. 1 except that in the cataphoretic continuous dipping apparatus 110, unlike the anaphoretic continuous dipping apparatus 10, the movement path is not divided by physical rail segments 22a, 22b, 22c and 22d but by potential districts in the bath realized near the anodes 118.
  • the potentials at the anodes 118 in the second embodiment are changed analogously to the potentials at the segments 22a, 22b, 22c and 22d of the first embodiment as soon as the presence of a workpiece 170 from the corresponding presence sensor 134 is detected.
  • the voltage curve on the workpieces 170 corresponds to that in FIG FIG. 2 shown.
  • the coating speed is influenced here by all anodes 118.
  • the coating speed at each workpiece 170 is additionally controlled by the removal of the corresponding cathode suspension 150 from the anodes 118.
  • FIG. 4 is a Takttauchlackierstrom 210 for cataphoretic dip painting shown in vertical section.
  • a plurality of workpieces 270 with a continuously increasing during the coating coating DC voltage U (T) is applied, which overall the same time course as the coating DC voltage U (T) in the first embodiment of the continuous dip coating system 10 of the FIGS. 1 and 2 Has.
  • the voltage curve in the Takttauchlackierstrom 210 is in FIG. 5 shown.
  • Those elements to those of the continuous dip coating 10 from the FIGS. 1 and 2 are similar, are provided with the same reference numerals plus 200.
  • anodes 218 On both sides of the workpieces 270 a plurality of anodes 218 is immersed in the paint liquid.
  • the anodes 218 may optionally be surrounded in a known manner in each case with a membrane which forms a dialysis cell.
  • Each anode 218 is connected via a stationary contact 209, an anode terminal 203 and a fixed electrical installation connection 205 connected to the positive pole of the rectifier 220 combined with an isolating transformer. Of some leading to the hidden work electrical installation connection 205 only the ends connected to the rectifier 220 are shown.
  • the rectifier 220 is also grounded.
  • the rectifier 220 is connected to a PC (not shown) or to a programmable controller (PLC), with which a time profile for the coating DC voltage U (T) can be specified, as described in US Pat FIG. 5 is shown.
  • PLC programmable controller
  • the workpieces 270 are each connected via a flexible galvanic contact 211 to a cathode terminal 204. From this, a fixed electrical installation line 206 leads to the negative pole of the rectifier 220. Again, the ends of some fixed electrical installation lines 206 leading away from the rectifier 220 are shown leading to concealed workpieces.
  • the flexible contacts 211 are each designed such that the associated workpiece 270 is permanently connected to the cathode connection 204 during immersion or when lifting out.
  • the rectifier 220 After immersing the workpieces 270 in the plunge pool 212, the rectifier 220 is controlled by the PC or the PLC in such a way that it generates the coating DC voltage U (T) which, as in FIG FIG. 5 shown is increased time-dependent.
  • the coating DC voltage U (T) is applied to the workpieces 270 via the positive terminal of the rectifier 220, the electrical installation connections 205, the anode terminals 203, the stationary contacts 209 and the anodes 218 on the one hand and the electrical installation lines 206, the cathode terminals 204 and the flexible contacts 210 on the other hand.
  • the coating DC current U (T) is steplessly controlled by the coating current I (T) such that the current density at the surface of the workpiece remains constant during the immersion process, irrespective of the size of the submerged surfaces and then over time.
  • the workpieces 170; 270 be coated with a different coating medium.
  • the input AC voltage may also be greater than 400V.
  • a medium voltage for example of the order of 10 kV to 20 kV.
  • a regulated rectifier 20; 120; 220 may also be provided an unregulated rectifier.
  • the control can also be taken over by corresponding semiconductor switches, for example.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (13)

  1. Procédé de revêtement électrophorétique de pièces avec un agent de revêtement, dans lequel au moins une pièce est immergée dans l'agent de revêtement, une tension continue est appliquée entre la pièce et au moins une électrode immergée dans l'agent de revêtement à l'aide d'une source de tension, et la tension continue est augmentée pendant l'électrophorèse,
    caractérisé en ce que
    la tension continue (U(T)) est augmentée de façon continue et progressive pendant presque toute la durée de revêtement de telle sorte que la densité de courant de revêtement à la surface de la pièce est constante dans le temps, une tension continue de revêtement initiale UA étant immédiatement suivie d'une forte augmentation du courant de revêtement I(T) à une valeur IB, qui reste constante au fur et à mesure que l'épaisseur de couche augmente.
  2. Procédé selon la revendication 1, caractérisé en ce que la tension (U(T)) est augmentée jusqu'à une tension limite (UG) qui est prédéfinie en particulier en fonction de l'agent de revêtement.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une pluralité de pièces (170) est transportée simultanément dans le bain d'une installation de revêtement en continu (10 ; 110) et, avec la source de tension (20, 24a, 24b, 24c, 24d ; 120, 124a, 124b, 124c, 124d), la même variation de tension dans le temps (U(T)) est fournie, chaque fois décalée dans le temps, pour chaque pièce.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pièce (270) est immergée de manière cyclique dans un bain d'une installation de revêtement cyclique (210).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une tension continue est générée avec un seul redresseur (20 ; 120) à partir d'une tension alternative d'entrée et la ou les tension(s) continue(s) variable(s) (U(T)) appliquée(s) à la pièce (170) est/sont générée(s) à partir de cette tension continue au moyen d'au moins un circuit électronique (24a, 24b, 24c, 24d ; 124a, 124b, 124c, 124d) commandé par une unité de commande de l'installation de revêtement.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'agent de revêtement est de la peinture.
  7. Installation de revêtement pour le revêtement électrophorétique de pièces avec un agent de revêtement, comprenant une cuve de bain dans laquelle au moins une pièce peut être immergée, une source de tension pour appliquer une tension continue variable entre la pièce et au moins une électrode dans la cuve de bain,
    caractérisée en ce que
    la source de tension (20, 24a, 24b, 24c, 24d ; 120, 124a, 124b, 124c, 124d ; 220) présente au moins un circuit électronique (24a, 24b, 24c, 24d ; 124a, 124b, 124c, 124d), avec lequel elle peut être commandée de telle sorte qu'elle délivre une tension continue U(T) qui peut être augmentée de façon continue et progressive pendant presque toute la durée de revêtement de telle sorte que la densité de courant de revêtement à la surface de la pièce reste constante dans le temps, une tension continue de revêtement initiale UA étant immédiatement suivie d'une forte augmentation du courant de revêtement I(T) à une valeur IB, qui reste constante au fur et à mesure que l'épaisseur de couche augmente.
  8. Installation de revêtement selon la revendication 7, caractérisée en ce qu'il s'agit d'une installation de revêtement en continu (10) qui présente :
    a) un système de transport qui fait passer les pièces à travers la cuve de bain (12) le long d'un trajet de déplacement, et
    b) un agencement de barres conductrices (22) qui s'étend le long du trajet de déplacement, avec lequel les pièces sont mises en contact électrique lorsqu'elles traversent la cuve de bain (12) et qui est divisé galvaniquement en une pluralité de segments (22a, 22b, 22c, 22d), plusieurs, de préférence tous les segments (22a, 22b, 22c, 22d) étant reliés par l'intermédiaire d'un commutateur à semi-conducteurs respectif (24a, 24b, 24c, 24d) à un pôle d'un seul redresseur (20), de telle sorte que la tension U(T) présente à un segment (22a, 22b, 22c, 22d) peut être transmise dans une grandeur commandable au segment (22b, 22c, 22d) suivant dans la direction de déplacement ;
    c) l'autre pôle du redresseur (20) étant relié à ladite au moins une électrode (18).
  9. Installation de revêtement selon la revendication 7, caractérisée en ce qu'il s'agit d'une installation de revêtement en continu (110) qui présente :
    a) un système de transport qui fait passer les pièces à travers la cuve de bain (112) le long d'un trajet de déplacement,
    b) un agencement de barres conductrices (122) qui s'étend le long du trajet de déplacement, avec lequel les pièces (170) sont mises en contact électrique lorsqu'elles traversent la cuve de bain (112) et qui sont reliées à un pôle d'un seul redresseur (120) ;
    c) une pluralité d'électrodes (118) disposées l'une derrière l'autre le long du trajet de déplacement, dont chacune est reliée à l'autre pôle du redresseur (120) par l'intermédiaire d'un commutateur à semi-conducteurs respectif (124a, 124b, 124c, 124d), de telle sorte que la tension U(T) appliquée à la pièce (170) dans la région spatiale d'une électrode (118) peut être transmise à la région de l'électrode (118) suivante dans la direction de déplacement, en particulier dans une grandeur commandable.
  10. Installation de revêtement selon la revendication 7, caractérisée en ce que l'installation de revêtement est une installation de revêtement cyclique (210).
  11. Installation de revêtement selon l'une des revendications 7 à 10, caractérisée en ce que la source de tension présente un seul redresseur (20 ; 120 ; 220) ainsi qu'au moins un circuit électronique commandable (24a, 24b, 24c, 24d ; 124a, 124b, 124c, 124d) branché en aval de celui-ci, qui génère une tension continue U(T) de grandeur variable en continu à partir de la tension fournie par le redresseur (20 ; 120 ; 220).
  12. Installation de revêtement selon la revendication 10, caractérisée en ce que le circuit électronique est un circuit IGBT (24a, 24b, 24c, 24d, 26, 28).
  13. Installation de revêtement selon l'une des revendications 7 à 12, caractérisée en ce que l'agent de revêtement est de la peinture.
EP07786409.8A 2006-09-20 2007-07-28 Procédé de revêtement électrophorétique de pièces à usiner et installation de revêtement Active EP2064372B1 (fr)

Applications Claiming Priority (2)

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DE102006044050A DE102006044050A1 (de) 2006-09-20 2006-09-20 Verfahren zur elektrophoretischen Beschichtung von Werkstücken und Beschichtungsanlage
PCT/EP2007/006699 WO2008034484A2 (fr) 2006-09-20 2007-07-28 Procédé de revêtement électrophorétique de pièces à usiner et installation de revêtement

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011056496A1 (de) * 2011-12-15 2013-06-20 Dürr Systems GmbH Beschichtungsanlage und Verfahren zum Beschichten von Werkstücken
JP5708471B2 (ja) * 2011-12-20 2015-04-30 トヨタ自動車株式会社 電着塗装システム
DE202013009714U1 (de) 2012-03-02 2014-01-02 Basf Coatings Gmbh Werkstück beschichtet mit einem Elektrotauchlack
CN102758238B (zh) * 2012-07-26 2016-03-30 无锡澳美机械有限公司 一种大型件电泳装置及其电泳工艺
DE102013224748B4 (de) 2012-12-21 2014-12-24 Basf Coatings Gmbh Verfahren zur Ermittlung der maximalen Abscheidespannung oder Abscheidestromstärke bei einem Elektrotauchlackierverfahren
CN103526264B (zh) * 2013-08-26 2016-05-04 广东科富科技股份有限公司 一种阴极电泳涂膜制备实验装置
CN110668083B (zh) * 2019-11-01 2024-05-24 苏州柳溪机电工程有限公司 多工艺高效智能涂装流水线
DE102021111415A1 (de) 2021-05-03 2022-11-03 Dürr Systems Ag Verfahren zum betreiben einer behandlungsanlage sowie behandlungsanlage und computer programm produkt

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1081767A (en) 1963-09-23 1967-08-31 Blundell Permoglaze Ltd Production of synthetic resin or like surface coatings by electrode position
DE1577934A1 (de) 1966-03-17 1970-03-05 Siemens Ag Einrichtung zur Stromversorgung von Werkstuecken beim Durchlauf elektrophoretischer Lackierbaeder
DE1652430A1 (de) 1966-03-17 1971-03-18 Siemens Ag Einrichtung zur Stromversorgung von Werkstuecken beim Durchlauf elektrophoretischer Lackierbaeder
US3855106A (en) 1973-06-04 1974-12-17 Gen Motors Corp Process for electrodeposition of paint
JPH01246397A (ja) 1988-03-29 1989-10-02 Trinity Ind Corp 電着塗装方法
EP0255268B1 (fr) 1986-07-22 1991-04-10 Toyota Jidosha Kabushiki Kaisha Procédé de revêtement par électrodéposition
JPH03274300A (ja) 1990-03-26 1991-12-05 Honda Motor Co Ltd 電着塗装方法
EP0854207A1 (fr) 1996-07-23 1998-07-22 Nippon Paint Co., Ltd. Procede d'electrodeposition cationique et composition de revetement pour electrodeposition cationique
JP2002030486A (ja) 2000-07-12 2002-01-31 Poritekkusu:Kk 電着塗装装置
JP2003277991A (ja) 2002-03-27 2003-10-02 Kansai Paint Co Ltd アルミニウム合金の塗膜形成方法
DE10325656B3 (de) 2003-06-06 2004-07-15 EISENMANN Maschinenbau KG (Komplementär: Eisenmann-Stiftung) Elektrophoretische Tauchlackieranlage
JP2005002397A (ja) 2003-06-11 2005-01-06 Canon Inc 粗面化ローラの製造方法
WO2005073436A1 (fr) 2004-01-22 2005-08-11 Eisenmann Maschinenbau Gmbh & Co. Kg Procede et dispositif pour determiner l'epaisseur d'une couche de peinture

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01124397A (ja) 1987-11-09 1989-05-17 Teijin Ltd アスペルギルスに対するヒト・モノクローナル抗体とその製造法
DE19502470A1 (de) * 1995-01-27 1996-08-01 Basf Lacke & Farben Pulsmoduliertes Gleichspannungsapplikationsverfahren
DE10054489A1 (de) * 2000-11-03 2002-05-29 Zf Sachs Ag Leistungs-Umrichtermodul

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1081767A (en) 1963-09-23 1967-08-31 Blundell Permoglaze Ltd Production of synthetic resin or like surface coatings by electrode position
DE1577934A1 (de) 1966-03-17 1970-03-05 Siemens Ag Einrichtung zur Stromversorgung von Werkstuecken beim Durchlauf elektrophoretischer Lackierbaeder
DE1652430A1 (de) 1966-03-17 1971-03-18 Siemens Ag Einrichtung zur Stromversorgung von Werkstuecken beim Durchlauf elektrophoretischer Lackierbaeder
US3855106A (en) 1973-06-04 1974-12-17 Gen Motors Corp Process for electrodeposition of paint
EP0255268B1 (fr) 1986-07-22 1991-04-10 Toyota Jidosha Kabushiki Kaisha Procédé de revêtement par électrodéposition
JPH01246397A (ja) 1988-03-29 1989-10-02 Trinity Ind Corp 電着塗装方法
JPH03274300A (ja) 1990-03-26 1991-12-05 Honda Motor Co Ltd 電着塗装方法
EP0854207A1 (fr) 1996-07-23 1998-07-22 Nippon Paint Co., Ltd. Procede d'electrodeposition cationique et composition de revetement pour electrodeposition cationique
JP2002030486A (ja) 2000-07-12 2002-01-31 Poritekkusu:Kk 電着塗装装置
JP2003277991A (ja) 2002-03-27 2003-10-02 Kansai Paint Co Ltd アルミニウム合金の塗膜形成方法
DE10325656B3 (de) 2003-06-06 2004-07-15 EISENMANN Maschinenbau KG (Komplementär: Eisenmann-Stiftung) Elektrophoretische Tauchlackieranlage
JP2005002397A (ja) 2003-06-11 2005-01-06 Canon Inc 粗面化ローラの製造方法
WO2005073436A1 (fr) 2004-01-22 2005-08-11 Eisenmann Maschinenbau Gmbh & Co. Kg Procede et dispositif pour determiner l'epaisseur d'une couche de peinture

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HUE043737T2 (hu) 2019-09-30
US20090314640A1 (en) 2009-12-24
WO2008034484A3 (fr) 2008-08-21
US8182667B2 (en) 2012-05-22
WO2008034484A2 (fr) 2008-03-27
EP2064372A2 (fr) 2009-06-03
DE102006044050A1 (de) 2008-04-03

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