EP1287900A2 - Installation de revêtement comprenant une boucle de régulation - Google Patents

Installation de revêtement comprenant une boucle de régulation Download PDF

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Publication number
EP1287900A2
EP1287900A2 EP02018587A EP02018587A EP1287900A2 EP 1287900 A2 EP1287900 A2 EP 1287900A2 EP 02018587 A EP02018587 A EP 02018587A EP 02018587 A EP02018587 A EP 02018587A EP 1287900 A2 EP1287900 A2 EP 1287900A2
Authority
EP
European Patent Office
Prior art keywords
valve
color
pressure
control
valves
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
EP02018587A
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German (de)
English (en)
Other versions
EP1287900B1 (fr
EP1287900A3 (fr
Inventor
Stefano Giuliano
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.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP1287900A2 publication Critical patent/EP1287900A2/fr
Publication of EP1287900A3 publication Critical patent/EP1287900A3/fr
Application granted granted Critical
Publication of EP1287900B1 publication Critical patent/EP1287900B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/149—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet characterised by colour change manifolds or valves therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air

Definitions

  • the invention relates to a coating system with a control loop for regulating the pressure and / or the flow rate of by a line flowing paint according to the preamble of Claim 1.
  • a color changer serves in Such plants usually one from pneumatically driven, each of a selectable color associated color valves existing arrangement whose output via a color pressure regulator and a metering pump is connected to the atomiser (DÜRR, Technical manual, Introduction to the technique of car painting, April 1999).
  • the color valves of the known color changer have two switch positions in which they lead the way block or open common color channel (so it is by 2/2-way valves).
  • a desired color is selected by Actuation of the relevant color valve with control air upstream solenoid valves coming from the plant control convert electrical signals into pneumatic signals.
  • solenoid valves are corresponding many solenoid valves available and in the known systems as well to guide many control lines through the painting machine. It It is also possible to attach solenoid valves directly to the paint valve (DE 10056259), wherein directly or indirectly switching solenoid valves can be used.
  • the usually arranged at the output of the color changer color pressure regulator can provide a pre-pressure control of the dosing pump, but also serve as an actuator for color quantity control.
  • the color coat or possibly another liquid
  • the control air pressure is in the closed loop of an electronic control system regulated, the pressure actual value of the control air generating Proportional pressure control valve with a pressure setpoint compares and the pressure control valve with a corresponding Control value controls. This is not directly the color regulated, but the control air pressure from the color pressure regulator with a determined by the area ratio of the membranes Transmission ratio (eg 2: 1) passed to the paint pressure becomes.
  • the color pressure regulator of the known systems are used as a pressure intensifier, as the required color print will be higher can be considered the air pressure available in the control system. It is also possible, the control electronics at the inputs and / or outputs fed to a metering pump measured actual pressures on which then the manipulated variable for the proportional valve based.
  • the well-known color pressure regulator (DÜRR, technical description for Color pressure regulator for EcoMCC3, 13.03.2001) have because of the necessary relatively large-area membranes large dead spaces at cause any color change high color and detergent losses. Furthermore, due to an unfavorable course of the Fluid path in the color pressure regulator not only color deposits, but also pressure drops, especially when flushing and when pressing new color impact, as at lower Pressure a higher detergent requirement for subsequent components required while being pressed in the new color the pressing time extended. The by rinsing and pressing Extended color change time reduces the coater productivity. In addition, the membranes of the known Color regulator often damaged due to its high load under which the process reliability suffers.
  • the membranes are required by the required loaded high pressures.
  • the membranes allow as a "soft" control circuit member only a limited dynamics and dosing accuracy.
  • the invention is based on the object, a coating system with a reliable actuator for the pressure or the Specify flow rate of paint, the low dead space volume has and quickly and with little color and detergent losses can be rinsed.
  • control loop as the actual value, the signal of a pressure transducer is fed, the color pressure in the actuator downstream Line measures, can be done without any special effort in one Color change system constantly monitors the prevailing pressure become.
  • each of the paint valves is through an actuator for the pressure or flow control of the paint formed, each by a pneumatic or electric driven valve is formed in shut-off valve construction, whose Drive device as a function of the actual value to controlling color of the paint is controlled. Because here is the function the previously common color pressure regulator of the color valves itself can be taken on a the color changer downstream Color regulator can be dispensed with. This accounts its disadvantages such as component cost, flushing and color, Detergent and flushing time losses.
  • a color pressure regulator 2 as an actuator for Adjusting the pressure of the colorant to be supplied to the atomizer 1 connected.
  • the color pressure regulator 2 is dependent on the air pressure (P) at the output of a trained as a pneumatic proportional valve Controlled pressure control valve 3, which at the entrance to a Compressed air source 4 is connected and of a control electronics 5 via line 6 a z.
  • the control electronics exchange with the higher-level system control PLC or other control information via nominal and actual values as well as operating parameters.
  • the color print to be used as the actual value is preferably instantaneous measured at the output of the color pressure controller 2 and from there via the line 7 of the control electronics 5 is supplied.
  • the color pressure regulator 2 may be one for other purposes known construction of a shut-off valve, whose opening width from a pneumatic (or in other embodiments electric) drive is controllable.
  • a pneumatically by a piston (or perhaps by a membrane) driven needle valve gives the advantage that the force exerted by the color print on the needle because of the small Needle area is always much smaller than the available standing, acting on the piston (or the membrane) regulating force. As a result, the scheme is much more dynamic than before.
  • FIG Fig. 2 A suitable construction for the color pressure regulator 2 is shown in FIG Fig. 2 shown. It is a known per se Needle valve 20 with positive valve seat, whose in the valve body 11 slidably mounted valve needle 12 from a pneumatic acted upon piston 13 against the force of a spring fourteenth is moved and adjusted.
  • the valve needle 12 and the piston 13 are shown in two different positions; in the first position is the conical valve tip 15 of the spring Pressed 14 in the valve seat 16, so that the valve from the way Input 17 to the output 18 shuts off.
  • the valve is through the space in the 19th on the piston 13 'acting control air pressure as a function of its size is more or less wide open.
  • the room 19 is in the example considered to the output of the pressure control valve 3 connected in Fig. 1, while the input 17 with the Color changer and the output 18 connected to the atomizer 1 are.
  • Fig. 3 shows the application of the control circuit described here for the color quantity control.
  • the atomizer 1 with the schematic illustrated standard main needle valve HNV, the color pressure regulator 2, the pressure control valve 3, the compressed air source 4 and the plant control PLCs agree with the corresponding elements in Fig. 1 match, wherein serving as an actuator color pressure regulator 2
  • the control electronics 5 'via a line 30 is the actual value of the volume flow of the atomizer 1 flowing Color bleach supplied from a the color pressure regulator. 2 downstream color quantity sensor 31 is measured. In case of deviations this actual value of the setpoint compared with it controls the control electronics 5 'the pressure control valve 3 with the corresponding control variable via line 6, so that the pressure control valve 3, the color pressure regulator 2 forming valve in the required Dimensions open more or less wide.
  • this can be the color pressure regulator forming Actuator also be an electrically driven shut-off valve.
  • An example of this is the needle valve shown in Fig. 4 40 with negative valve seat and an electric drive motor 41 for the valve needle 42 for adjusting the opening width.
  • the Valve needle is as shown in Fig. 2 again here both in the Closed position as well as in the 42 'recognizable opening position shown.
  • the drive motor 41 can, for example as a linear servo motor, ie as a direct linear drive, or as indirect drive z. B. with a ball screw part or in the hydraulic known per se as a proportional solenoid be executed.
  • the for generating the actual pressure signals for example in FIG. 1 and 3 provided pressure transducer is preferably directly to the actuator used in each case, in this case the needle valve 40 grown or as the illustrated pressure transducer 43 in the Built-in valve, allowing the color pressure directly on the valve seat can be measured.
  • the at the electrical output line 44 of the pressure transducer 43 signal generated in Fig. 1 and 3 transmitted via the line 7 as a pressure actual value.
  • a suitable electromagnetically driven needle valve 50 that as an actuator of the control loop described here instead the pneumatically controlled color pressure regulator 2 in Fig. 1 or Fig. 3 can be used is shown schematically in Fig. 5.
  • the valve needle 52 of this valve is a spring 54 in the closed position against the valve seat 55 and a with The proportional shaft coupled to the needle shaft, the winding 53 acts on the armature 51 of the valve needle, in per se known Way against the force of spring 54 in the open position pulled, in which the path from the color input 57 to the color output 58 depending on the current flowing through the magnet winding electric current is more or less wide open.
  • each the paint valves no longer as before as a simple 2/2-way valve to open and lock the relevant ink path trained, but as an actuator for the pressure or Volume control of the paint, whose drive device in Dependent on the actual value of the color of the paint to be controlled is controlled. So here are the color valves F1, F2, F3, etc. of the color changer 60 itself as an actuator for the zu regulating size. If the color printing is to be regulated, can as the actual value of the control electronics, for example, the input (or output) of the metering pump 62 supplied measured color pressure become.
  • the color valves of the color changer 60 may be electrically or pneumatically driven and by electric or pneumatic Control signals are controlled. For example, suppose that they are similar to the control circuits of FIG. 1 and FIG. 3 by the air pressure generated by a proportional valve on the Input 63 of a control module 64 described below driven be connected to each of the color valves outputs 65 has and this outlet air pressure of all color valves common pressure control valve at its respective controlled Output outputs.
  • the control module 64 thus serves as a path control device for applying the pneumatic manipulated variable serving Compressed air to the respective desired color valve.
  • the rest Color valves are z. B. by a spring in its closed position held, since only one color valve are opened may.
  • the control module 64 For selecting the output 65 at which the pneumatic Control value to be delivered, the control module 64 by binary pneumatic or electrical control signals at the inputs B, C and D controlled. This system avoids the need a separate proportional control valve for each of the u. U. many color valves F1, F2, F3, etc.
  • the proportional valve could also be between the external compressed air supply and the compressed air input of a color valves in Block construction containing commercial so-called valve terminal be grown.
  • a convenient way to implement the control module 64 in Fig. 6 is a block of multi-level directional valves which are controlled by binary coded input signals to save control lines in a known manner.
  • the input signals B, C and D can z.
  • B pneumatic signals generated by solenoid valves with two possible pressure values (on / off) and the color valves connected to the eight outputs F1, F2, F3, etc.
  • control module 64 input output magnetic valve Control signal for color control valves B C D 0 0 0 F1 0 0 1 F2 0 1 0 F3 0 1 1 F4 1 0 0 F5 1 0 1 F6 1 1 0 F7 1 1 F8 ⁇ binary number ⁇ decimal number
  • 2 n output signals can be decoded from n input signals.
  • FIG. 8 schematically a preferred, because particularly compact and therefore space-saving and also low installation and installation effort requiring embodiment of the control module 64 (FIG. 6) shown for eight paint valves.
  • the special feature here is the training of the three levels forming 3/2, 6/2 and 12/2-way valves in a common block-like housing with labyrinthine distributed paths for the inlet air pressure A of common pressure control valve. So the three valves are in theirs common housing block linked by drilling each other.
  • Fig. 8 shows the control module in its eight different ones possible positions depending on the binary input signals B, C and D according to the above table. This Positions become in the considered example by these input signals forming existing or missing air pressure, as shown on a respective piston against the force each one return spring acts.
  • FIG. 8 A in principle Fig. 8 corresponding, similar advantageous, but in applications, possibly preferable design of the control module with circular control movements of the piston assemblies is shown schematically in Fig. 9, wherein the simplicity half an embodiment with only two levels for four output signals was chosen.
  • the two piston assemblies 90, 91 are mounted concentrically pivotable in the housing block 92 and be in the example considered at the control inputs 93, 94 acted upon by the two pressure signals B and C, so that the applied to the input 95 control pressure for the paint valves depending on the switching position by the two valve systems connecting two housing openings 96 to one of the four outputs 98 arrived.
  • the housing block 92 may be in two parts, wherein one part the exits and in the other part the entrances 93 and 94 may be arranged.
  • the described control module in its embodiment according to FIG. 8 and Fig. 9 is not only suitable for the control of paint valves a color changer z. As shown in FIG. 6, but more generally for controlling a plurality of valves such.
  • color valves F1, F2, F3, etc. of the color changer 60 in Fig. 6 instead of by the pneumatic directional control valve assemblies of FIG. 8 and FIG. 9 also electrically controlled and set to the respective setpoint become.
  • they can each have a functional Electronic circuit containing an electric valve drive
  • a possibly all valves perform common setting if the relevant valve is selected by separate control signals.
  • the control signals can be supplied via a data bus system in a known manner become.
  • a pneumatic / electronic bus control system as is known for example from DE 10056259 can used here.

Landscapes

  • Spray Control Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Fertilizers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP02018587A 2001-08-30 2002-08-19 Installation de revêtement comprenant une boucle de régulation Expired - Lifetime EP1287900B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10142355 2001-08-30
DE10142355A DE10142355A1 (de) 2001-08-30 2001-08-30 Beschichtungsanlage mit einem Regelkreis

Publications (3)

Publication Number Publication Date
EP1287900A2 true EP1287900A2 (fr) 2003-03-05
EP1287900A3 EP1287900A3 (fr) 2005-12-07
EP1287900B1 EP1287900B1 (fr) 2008-06-18

Family

ID=7697012

Family Applications (1)

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EP02018587A Expired - Lifetime EP1287900B1 (fr) 2001-08-30 2002-08-19 Installation de revêtement comprenant une boucle de régulation

Country Status (4)

Country Link
EP (1) EP1287900B1 (fr)
AT (1) ATE398495T1 (fr)
DE (2) DE10142355A1 (fr)
ES (1) ES2307686T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1346775A1 (fr) 2002-03-21 2003-09-24 Dürr Systems GmbH Pulvérisateur pour une installation de peinture
DE102005042336A1 (de) * 2005-09-06 2007-03-15 Dürr Systems GmbH Beschichtungsanlage und zugehöriges Beschichtungsverfahren
WO2008071273A2 (fr) 2006-12-12 2008-06-19 Dürr Systems GmbH Dispositif de revêtement équipé d'un dispositif de dosage
DE102006058562A1 (de) 2006-12-12 2008-08-14 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
DE102007029195A1 (de) 2007-06-25 2009-02-19 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
EP2036618A1 (fr) 2006-05-09 2009-03-18 DürrSystems GmbH Système de dosage pour une installation de revêtement
US7934466B2 (en) 2006-03-02 2011-05-03 Durr Systems Inc. Coating plant and associated coating process
WO2009153219A3 (fr) * 2008-06-20 2012-02-02 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Appareil et procédé permettant d'alimenter un milieu de processus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231421A1 (de) 2002-07-11 2004-01-22 Dürr Systems GmbH Verfahren und System zur Versorgung eines Pulverbeschichtungsgerätes
ES2330632T3 (es) 2003-07-28 2009-12-14 Durr Systems Gmbh Dispositivo de pulverizacion con cambiador de color para el revestimiento en serie de piezas.
DE102017103454A1 (de) 2017-02-20 2018-08-23 Eisenmann Se Modul für eine modulare Wechseleinrichtung für Beschichtungsmaterialien sowie Wechseleinrichtung für Beschichtungsmaterialien

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056259A1 (de) 2000-11-14 2002-05-23 Duerr Systems Gmbh Farbwechselventilanordnung und Verfahren zu ihrer Steuerung

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DE2002315A1 (de) * 1970-01-20 1971-07-29 Zahnradfabrik Friedrichshafen Elektro-hydraulische Steuereinrichtung fuer Antriebsanlagen,insbesondere in Kraftfahrzeugen
DE3137074C2 (de) * 1981-09-17 1986-08-07 Ransburg Gmbh, 6056 Heusenstamm Anlage zum elektrostatischen Beschichten von Werkstücken mit einer Flüssigkeit
DE3423094A1 (de) * 1984-06-22 1986-01-02 J. Wagner Gmbh, 7990 Friedrichshafen Verfahren und vorrichtung zum einstellen eines durchflussmengen-steuerventils einer farbspritzpistole
DE3822835A1 (de) * 1988-07-06 1990-03-08 Josef Schucker Verfahren und anordnung zum lackieren von werkstueckoberflaechen
EP0480080A1 (fr) * 1990-10-08 1992-04-15 Trinity Industrial Corporation Appareil de revêtement
EP1237061A1 (fr) * 2001-03-02 2002-09-04 Thomas Dipl-Ing. Schmidt Méthode et dispositif de télécommande d'une pluralité d'actionneurs

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056259A1 (de) 2000-11-14 2002-05-23 Duerr Systems Gmbh Farbwechselventilanordnung und Verfahren zu ihrer Steuerung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DÜRR: "Technische Handbuch, Einführung in die Technik der PWK-Lackierung", April 1999

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1346775A1 (fr) 2002-03-21 2003-09-24 Dürr Systems GmbH Pulvérisateur pour une installation de peinture
DE102005042336A1 (de) * 2005-09-06 2007-03-15 Dürr Systems GmbH Beschichtungsanlage und zugehöriges Beschichtungsverfahren
EP1764159A1 (fr) 2005-09-06 2007-03-21 Dürr Systems GmbH Dispositif et procédé de revêtement
US7934466B2 (en) 2006-03-02 2011-05-03 Durr Systems Inc. Coating plant and associated coating process
EP2036618A1 (fr) 2006-05-09 2009-03-18 DürrSystems GmbH Système de dosage pour une installation de revêtement
WO2008071273A2 (fr) 2006-12-12 2008-06-19 Dürr Systems GmbH Dispositif de revêtement équipé d'un dispositif de dosage
DE102006058562A1 (de) 2006-12-12 2008-08-14 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
US8333164B2 (en) 2006-12-12 2012-12-18 Duerr Systems, Gmbh Coating apparatus comprising a metering device
EP2853312A2 (fr) 2006-12-12 2015-04-01 Dürr Systems GmbH Dosage ICC
DE102007029195A1 (de) 2007-06-25 2009-02-19 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
WO2009153219A3 (fr) * 2008-06-20 2012-02-02 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Appareil et procédé permettant d'alimenter un milieu de processus

Also Published As

Publication number Publication date
EP1287900B1 (fr) 2008-06-18
EP1287900A3 (fr) 2005-12-07
DE50212376D1 (de) 2008-07-31
ATE398495T1 (de) 2008-07-15
DE10142355A1 (de) 2003-03-20
ES2307686T3 (es) 2008-12-01

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