EP1502656A2 - Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique et système de liaison pour cela - Google Patents

Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique et système de liaison pour cela Download PDF

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Publication number
EP1502656A2
EP1502656A2 EP04017646A EP04017646A EP1502656A2 EP 1502656 A2 EP1502656 A2 EP 1502656A2 EP 04017646 A EP04017646 A EP 04017646A EP 04017646 A EP04017646 A EP 04017646A EP 1502656 A2 EP1502656 A2 EP 1502656A2
Authority
EP
European Patent Office
Prior art keywords
container
coupling
valve
paint
ink supply
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
EP04017646A
Other languages
German (de)
English (en)
Other versions
EP1502656B1 (fr
EP1502656A3 (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
Priority to SI200431549T priority Critical patent/SI1502656T1/sl
Priority to PL04017646T priority patent/PL1502656T3/pl
Publication of EP1502656A2 publication Critical patent/EP1502656A2/fr
Publication of EP1502656A3 publication Critical patent/EP1502656A3/fr
Application granted granted Critical
Publication of EP1502656B1 publication Critical patent/EP1502656B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0458—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being perpendicular just upstream the mixing chamber
    • 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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device

Definitions

  • the invention relates to a process for supplying ink to a electrostatic coating device with coating material changing color according to the preamble of the claim 1 and in particular according to EP 1 369 183 A2 (DE 102 23 498). Furthermore, the invention relates to a suitable for this purpose Electrical isolation unit and a coupling device for this.
  • the paint reservoir are here in A / B operation on the one hand to the atomizer leading piggable connecting lines and on the other hand to the output channels of conventional color change valve arrangements (Color changer) of the supply system docked.
  • These mechanical isolation has because of the reliable Adjustment of the required isolation distances by air gaps the advantage of the greatest possible safety.
  • Opposite the Galvanic isolation by common cable sections EP 1 270 083, EP 1 314 483), it also has the advantage that at a Color change or refilling the coating material does not have to be reprinted.
  • EP 1 245 295 is a color change system for a coating system the kind considered here, that instead of the hitherto common color change valve blocks (see, for example, EP 0 979 964 and DE 198 46 073) from an assembly of paint supply valves, to which one with the Nebulizer connected valve is directly coupled.
  • To mutual Positioning are the paint supply valves and the atomizer side valve relative to each other linear or displaceable in a circular motion.
  • the through the valves formed media couplings can be one or both sides lockable and especially when trained as a ball valve be piggable.
  • the realization of a color changer by docking the atomizer-side coupling part to one certain color associated with the valves of the paint supply system has u.a.
  • the known system has the disadvantage that in many cases the desired filling of the system with a predetermined and for example for the coating limited to a workpiece or workpiece area Color volume practically only within the to the atomizer leading hose line can realize what not only associated with appropriate tax expense, but also a correspondingly sized hose volume requires.
  • the invention is based on the object, a method or a potential separation unit and a coupling device to specify for this, with little effort and one of all within the coating machine space-saving supply line arrangement a safe electrical isolation between the coating device and its grounded ink supply device enable. This should be minimal Color and detergent losses, especially in a color change be achieved.
  • the invention is based on the knowledge that makes more sense Combination of the proposed in EP 1 369 183 Color supply system with the known from EP 1 245 295 Color change system to use their respective advantages and essential to achieve further advantages.
  • the invention becomes the potential separation problem in a simple way without being caused by the potential separation Loss of coating material and detergent dissolved.
  • the system described here is characterized not only by low investment out, but also by good maintenance properties.
  • it is advantageous that maintenance and repair of components hardly lead to interruptions of the coating operation, if a majority of the application components are not in the paint booth but easy to access Interchangeable potential isolation module outside the cab.
  • An inventive potential separation module can be useful in a high voltage insulated, preferably easily accessible arranged outside the paint booth and possibly in known manner housed explosion-proof vented housing become.
  • the module contains at least one, preferably but as A / B system two paint reservoirs, the associated with associated metering systems.
  • For dosing of the coating material can be installed outside the cab Provided piston dispenser or the paint reservoir even be trained as a piston dispenser, but are in many cases conventional gear or other metering pumps to be preferred, especially when installed close to or in the atomizer the advantage of high dosing accuracy and have short dosing response times.
  • the module contains for each selectable color at least one each as a media coupling serving color supply system, which may be grounded.
  • this can Color supply valves in one or two-dimensional groups be arranged, wherein for coupling the paint reservoir these and / or the valve groups parallel to the plane of the Sliding valve assembly and when reaching the Ankuppelposition can be moved towards each other for docking.
  • the potential separation module can be means for potential separation for a dilution or rinsing medium and for a associated return line, for example with own to associated valves can be coupled to containers or only with movable coupling parts.
  • the potential isolation module may also be a high voltage generator and / or other possibly required components such as For example, opto-electronic converter for speed measurement, Query of the main needle position in the atomizer and others Sensors included.
  • An inventive complete color change system contains at least in addition to the potential isolation module described above one or preferably for A / B operation two high voltage insulated molded hoses for the coating material and preferably each a high voltage insulated hose for dilution and recycling. This total of four hoses make the connection from the potential separation module as a hose package to the atomizer.
  • the pig target stations are located preferably close to or in the atomizer. optional can in the spray booth a Zerstäuber hiervoriques for in per se known manner exchangeable atomizer are located.
  • Coupling device has the particular advantage that it with her pig body is possible, color residues in the clutch leak-free and completely without residue from the coupling channels slough.
  • the paint supply system shown schematically in Fig. 1 contains a potential separation unit 1 to which a piggable Line arrangement 2 for the ink supply of an atomizer 3 is connected, as a coating device, for example on the wrist of a painting robot (not shown) can be mounted.
  • the potential separation unit 1 consists essentially of a Ink supply unit 10, a container unit 12 and a Color removal unit 14.
  • the ink supply unit 10 has two groups of ink supply valves 10A and 10B.
  • the individual ink supply valves can, for example, each a loop for one of the selectable colors of the coating material be connected, the valve units 10A and 10B can be supplied with the same colors.
  • the Container unit 12 includes two paint containers 12A and 12B, which are each provided with a connection valve 13, with the the container 12A to each of the appropriately trained Ink supply valves 10A and the container 12B to each of Color supply valves 10B can be docked.
  • the containers 12A and 12B may be connected to their connection valve 13 to each one provided in the ink extraction unit 14 color removal valve 14A and 14B, respectively, within the unit 14 are each connected to a pig station 15A and 15B.
  • a pig station 15A and 15B From Each of these pig stations carries one of the two lines 2 forming pig hoses 2A and 2B of the Electrical isolation unit 1, which serves as a module outside a paint booth can be arranged in the cabin and for example by the robot arm to one each preferably in the atomizer 3 located pig target station 30A and 30B.
  • the containers 12A and 12B for docking with the valves 10A or 10B and 14A or 14B between stationary units 10 and 14 reciprocated are also conceivable in which instead, the color supply unit 10 for docking and / or the color removal unit 14 and / or their coupling valves to be moved.
  • the color supply unit 10 for docking and / or the color removal unit 14 and / or their coupling valves to be moved is also a constant connection between the containers 12A, 12B and the pig stations 15A, 15B conceivable.
  • the unit 10 and possibly other valves is in itself only a relative movement between the containers and the valves necessary.
  • valves 10A and 10B may be shown in FIG a straight row or even in a matrix of several parallel even rows or instead on one or arranged a plurality of circular arcs and from the containers 12A and 12B with corresponding one- or two-dimensional linear movements and / or be traveled on circular paths.
  • the containers are for this purpose first of automatically due a stored program of the coating system controlled (not shown) drive means in parallel moved to the plane of the valve assembly.
  • the container After reaching the desired color valve are the container then to this by perpendicular to the plane of the valve assembly Motion coupled and uncoupled after filling.
  • suitable servo drives are available.
  • the containers may be attached to the paint extraction valves 14A and 14B 14B are coupled and disconnected from them again.
  • the entire ink supply unit 10 may be firmly grounded, which also causes the paint container when coupling to earth potential be placed. Since the containers 12A and 12B when coupling to the valves 10A and 10B by sufficiently large air gaps are separate from the paint extraction valves 14A and 14B for the required electrical insulation of the unit 10 from that to the valves 14A, 14B connected to high voltage potential lying atomizer 3 taken care of.
  • the potential separation unit 1 also means (not shown) for potential separation for a rinsing medium (usually thinner of the coating material) and for recycling to dispose of the flushing medium contain.
  • a rinsing medium usually thinner of the coating material
  • the potential separation can be omitted.
  • the ink containers 12A and 12B may be, for example, as shown in FIG Fig. 2 is shown by a flushable cylinder 210th be formed with a piston 211.
  • the piston 211 can for Filling and emptying the container from a (not shown) Motor driven or instead when filling by the pressure of the supplied medium and during emptying through a pressure medium such as compressed air or possibly through a relaxing compression spring to be moved.
  • the cylinder 210 is for filling and emptying via a line 212 with an attached valve assembly 213 connected to a Color connection F for coupling the container to one of the valves 10A, 10B, 14A or 14B, a connector V / PL for thinner and pulse air and another connection RF for the Contains feedback.
  • These connections can consist of valves.
  • valves such as e.g. 10A and 14A illustrated in Fig. 1, to which he with his color port F can be coupled.
  • the container With the connections V / PL and RF the container can be connected to corresponding (not shown) coupling valves associated cables in the potential isolation unit 1 docked.
  • ink containers 12A and 12B in themselves known manner (DE 103 20 147) as dosing for dosing of the nebulizer 3 supplied coating material to operate.
  • a conventional or other dosing pump directly on or preferably in the atomizer 3 to arrange.
  • FIGS. 3 and 4 schematically show two different embodiments represented by media couplings that not only but especially for the realization of the ink supply valves 10A and 10B, the port valves 13 and the paint extraction valves 14A and 14B of the paint supply system of FIG. 1 used and both have the advantage of being virtually dead space free and a problem-free separation of Clutch parts, for example, without leakage of the in operation if necessary, under pressure passed color or other medium enable. If no color change occurs, but For example, the container 12A or 12B only new with the the same color is filled, these couplings do not have or at least not flushed at each coupling operation, so that the otherwise occurring time and flushing losses be avoided.
  • the coupling device shown in Fig. 3 consists in Essentially from two separable and mergeable coupling parts 41 and 42.
  • the one coupling part 42 includes a first channel 43, via a connecting channel 46, for example connected to a loop for that color may be when the coupling part 42 for the realization one of the ink supply valves 10A, 10B in FIG. 1 serves.
  • the other coupling part 41 may be in the considered Fall on the container 12A and contains one second channel 44 which leads to a to the container 12A (and thus indirectly to the atomizer 3) leading channel 47 connected is.
  • the two channels 43 and 44 expediently cylindrical chambers, which at merged coupling parts exactly aligned with each other and in the connection plane the coupling parts 41 and 42 as shown by a Sealing ring 48 are enclosed.
  • a centering device (not shown).
  • this can further to a flushing channel 49th be connected for thinner and possibly pulse air.
  • the channels 46, 47 and 49 are preferably with automatically controlled Needled or other shut-off valves provided whose Valve seat disposed directly on the channels 43 and 44, respectively is.
  • a special feature of the dead space-free shown in Fig. 3 and flushable coupling according to the invention is that in merged coupling parts 41 and 42 a pig body 45 between the two channels 43 and 44 back and forth is and in this case with its sealing edges or wiper lips close to the channel walls.
  • the kind of one Piston moving pig body 45 is for this purpose at one from an automatically controlled motor (not shown) mounted driven piston rod 50.
  • he is as a chamber or Tandemmolch or double-lip piston in the EP 1 172 153 or EP 1 252 936 described type, in the annular space 53 between the for example, both ends provided with sealing edges thinner is passed through a purge passage 54, with an associated valve is provided. With this thinner the pig flushes through the channels 43 and 44 whose walls.
  • At the location of the flushing channel 54, at which the Pig body 45 can be filled with thinner, is located also a closable with a valve also Return channel 55.
  • the piston rod 50 and its mechanical drive are located preferably in the atomizer-side coupling part, So here in the container unit 12, since here in contrast to the ink supply unit 10 only a single pig with associated Drive is required and not one each Newts per color.
  • a seal 51 To seal the piston rod guide is provided on the coupling part, a seal 51.
  • the paint valve closed again and the pig 45 through the piston rod 50th again driven into the other coupling part 41, the interiors the coupling by the in the space 53 of the Molch located thinner and rinsed cleaned.
  • the channels 43 and 44 before the separation of the coupling parts 41, 42 or after their later reconnecting with thinner and pulsed air the channel 49 rinsed and dried, the pig body Perform 45 similar movements as when refueling can.
  • two-stage actuated Totraumtransport media coupling consists of two separable and centered collapsible coupling parts 61 and 62.
  • the Coupling part 61 is also here, for example the container 12A, while the other coupling part 62 is similar the part 42 in Fig. 3 in the ink supply unit 10 and via the connecting channel 63 to the relevant Ring line is connected.
  • a seal 64th is also shown between the two coupling parts 61 and 62.
  • a Hollow needle 70 along a central axis 66 of the coupling preferably displaceable (or possibly also fixed) stored.
  • the interior of the hollow needle 70 is a through the Coupling part leading channel connected to the container 12A and by a coaxially arranged in the hollow needle, along the axis 66 displaceable valve needle 71 on the am Front end of the hollow needle 70 formed valve seat 72 closed, when the coupling parts are disconnected.
  • the coupling part 62 is shown as a coaxial with the central axis 66 when the coupling is brought together cylindrical channel 75, which is perpendicular or transverse to the axis 66 extending parting plane 68 of the coupling parts initially conically constricted and then up to the Dividing plane 68 again expanded like a funnel.
  • the funnel-like Extension 76 is starting from the two coupling parts 61, 62 common parting plane 68 so deep that they are the projecting over the dividing plane tip of the hollow needle 70 receives and forms a seat for the hollow needle point.
  • a further seal 77 At the hollow needle point and / or at its seat at the Wall of the extension 76 is provided a further seal 77, so that the interior of the hollow needle 70 is sealed with the channel 75 is connected.
  • valve needle 80 In the channel 75 coaxially another valve needle 80 is arranged, its conical tip 81 with separate coupling the adjoining the extension 76 conical inner wall 82 of the channel 75 is applied to the channel to the outside close.
  • the valve needle 80 is in the coupling part 62nd slidably mounted and opens the channel 75 toward the coupling part 61 when coating material from the connecting channel 63 to flow into the hollow needle 70, whose interior for this purpose by coaxial displacement of the inner Valve needle 71 is opened, while the hollow needle tight in the extension 76 rests against the coupling part 62.
  • the coupling part 61 opens radially outside the hollow needle 70, but within the seal 64 one with another Valve provided channel 85 for thinner and pulsed air in the Parting plane 68.
  • a recycle channel 86 for the diluter At merged Coupling parts 61 and 62 can thereby the the Hollow needle tip surrounding interior of the clutch and, if appropriate Position of the hollow needle 70 and the valve needle 80th also rinsed the thus opened interiors and dried become.
  • the two coupling parts 61 and 62 merged and by means of the seal 64th tightly connected.
  • the hollow needle 70 is in two stages operated, i. its tip is attached to the inner wall of the Extension 76 pressed and by parallel shift the inner valve needle 71 is opened.
  • shifting the Valve needle 80 is the color path of the connecting channel 63rd in the interior of the hollow needle 70 and from there to the paint container Approved.
  • the Hollow needle 70 After filling the container is the Hollow needle 70 back again, with a possibly remaining, due to the illustrated design but in In any case, very little color residue in the coupling part 62nd can remain.
  • an intermediate flush the coupling parts take place. In any case, will flushed the clutch in a color change in this way.
  • the invention is not based on potential separation systems limited, but for example, for non-electrostatic Coating plants, for example with air atomizers suitable.
  • the described isolation unit not limited to color change systems, but Generally advantageous wherever two on different Potential lying parts of a material supply system connected and disconnected.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Spray Control Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
EP04017646A 2003-07-28 2004-07-26 Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique et système de liaison pour cela Expired - Lifetime EP1502656B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200431549T SI1502656T1 (sl) 2003-07-28 2004-07-26 Postopek za dovajanje barve elektrostatični napravi za nanašanje in sklopilna naprava za ta namen
PL04017646T PL1502656T3 (pl) 2003-07-28 2004-07-26 Sposób zasilania farbą elektrostatycznego urządzenia powlekającego i zespół łączący do niego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334413 2003-07-28
DE10334413 2003-07-28

Publications (3)

Publication Number Publication Date
EP1502656A2 true EP1502656A2 (fr) 2005-02-02
EP1502656A3 EP1502656A3 (fr) 2008-11-19
EP1502656B1 EP1502656B1 (fr) 2010-09-08

Family

ID=33521437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017646A Expired - Lifetime EP1502656B1 (fr) 2003-07-28 2004-07-26 Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique et système de liaison pour cela

Country Status (6)

Country Link
EP (1) EP1502656B1 (fr)
AT (1) ATE480336T1 (fr)
DE (1) DE502004011630D1 (fr)
ES (1) ES2352141T3 (fr)
PL (1) PL1502656T3 (fr)
SI (1) SI1502656T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2810719B1 (fr) 2005-10-07 2018-06-20 Dürr Systems AG Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674207A (en) * 1970-11-06 1972-07-04 Emidio J Carbonetti Jr Automated paint spray system
EP1108475A2 (fr) * 1999-12-18 2001-06-20 Dürr Systems GmbH Installation de peinture
EP1108474A2 (fr) * 1999-12-18 2001-06-20 INLAC Industrie-Lackieranlagen GmbH Installation de peinture
US20020064601A1 (en) * 2000-11-28 2002-05-30 Winfried Ott Method and apparatus for conveying electrically conductive paints between different voltage potentials
EP1369183A2 (fr) * 2002-05-27 2003-12-10 Dürr Systems GmbH Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674207A (en) * 1970-11-06 1972-07-04 Emidio J Carbonetti Jr Automated paint spray system
EP1108475A2 (fr) * 1999-12-18 2001-06-20 Dürr Systems GmbH Installation de peinture
EP1108474A2 (fr) * 1999-12-18 2001-06-20 INLAC Industrie-Lackieranlagen GmbH Installation de peinture
US20020064601A1 (en) * 2000-11-28 2002-05-30 Winfried Ott Method and apparatus for conveying electrically conductive paints between different voltage potentials
EP1369183A2 (fr) * 2002-05-27 2003-12-10 Dürr Systems GmbH Méthode et système d'alimentation de peinture pour une installation de revêtement électrostatique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2810719B1 (fr) 2005-10-07 2018-06-20 Dürr Systems AG Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement

Also Published As

Publication number Publication date
SI1502656T1 (sl) 2011-01-31
EP1502656B1 (fr) 2010-09-08
DE502004011630D1 (de) 2010-10-21
PL1502656T3 (pl) 2011-03-31
ES2352141T3 (es) 2011-02-16
EP1502656A3 (fr) 2008-11-19
ATE480336T1 (de) 2010-09-15

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