EP0865830B2 - Dispositif de changement de teinte avec sens de circulation de vernis réversible - Google Patents

Dispositif de changement de teinte avec sens de circulation de vernis réversible Download PDF

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Publication number
EP0865830B2
EP0865830B2 EP98104412A EP98104412A EP0865830B2 EP 0865830 B2 EP0865830 B2 EP 0865830B2 EP 98104412 A EP98104412 A EP 98104412A EP 98104412 A EP98104412 A EP 98104412A EP 0865830 B2 EP0865830 B2 EP 0865830B2
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EP
European Patent Office
Prior art keywords
paint
coloured
feed line
displacement body
color
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.)
Expired - Lifetime
Application number
EP98104412A
Other languages
German (de)
English (en)
Other versions
EP0865830A2 (fr
EP0865830B1 (fr
EP0865830A3 (fr
Inventor
Stefan Esslinger
Herbert Martin
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
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Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP0865830A2 publication Critical patent/EP0865830A2/fr
Publication of EP0865830A3 publication Critical patent/EP0865830A3/fr
Application granted granted Critical
Publication of EP0865830B1 publication Critical patent/EP0865830B1/fr
Publication of EP0865830B2 publication Critical patent/EP0865830B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • 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

Definitions

  • the invention relates to a device for painting objects with different colors, which are available in circular color guides, which are each associated with a color, with a spray gun, a Farbzumoltechnisch which a Lackierstoff für between the circular color guide and the spray gun or whose nozzle produces, and optionally a provided between the circular color ducts and the Farbzumoltechnisch color changer, through which in each case a color line with the Farbzumoltechnisch is connectable, wherein a displacement body for cleaning the Farbzumoltechnischtechnisch the Farbzumoltechnischtechnisch the Farbzumoltechnisch is movable.
  • a painting device with the features of the preamble of claim 1 is known from U.S. Patent 5,221,047 known.
  • the displacer is moved for expressing the color in the paint supply in Lackierfluß therapies to their spritzpistolen drunkem end, there removed by means of a reject device from the ink supply and returned via a separate line to a Einschleuß issued. To bridge this time, a plurality of displacers are provided. A return of befind Anlagen in the ink supply line color back into the color line is not provided. But that is taken for granted, from the JP 07 171 451 A known.
  • the present invention is based on the previously known painting the task of making the color return of the stich eins shamen ink supply line with displacers back to a respective circular color guide even more effective.
  • the color return by introducing a flowable medium, which may be preferably a gas, such as compressed air, or even to be a liquid solvent to support.
  • the liquid medium acts like a stamping pressure on the standing in the feed line color and ensures a thirty to fifty percent more effective return of color.
  • the feed device for the flowable medium forms a T-connection with the ink feed, this in turn results in an undesirable stub line. It is therefore proposed that the feed device comprises a valve which connects on its color side dead space free to the ink supply.
  • the flexible, flexible deformable displacer is provided, which is movable by the incoming medium via the feed medium in the ink supply line in the return direction and back in the direction of the spray gun during subsequent rinsing the ink supply.
  • the recovery rate can be increased to 95% or more, since the conductor inner wall is virtually wiped off by the movement of the yielding displacement body in the return direction.
  • the diameter of the displacer in the undeformed state substantially corresponds to the line internal diameter or is slightly larger than this.
  • the displacer is in a rest position, preferably in a mold cavity in the ink feed line in the region of the dead space-free valve port of the supply line.
  • the valve of the feed device for the flowable medium is opened, the displacer from the mold cavity is pressed under the action of the pressurized fluid medium in the clear cross-sectional area of the ink supply and moved in the return direction.
  • a stop device for the displacer is provided in the ink return direction in front of the ink return device, which forms a kind stop or limit for the displacer.
  • the stop device is formed in a particularly simple and therefore advantageous manner preferably by a cross-sectional constriction in the Farbzumoltechnisch.
  • a sensor for detecting the displacer is provided in the region of the stop device, in particular in the return direction in front of the stop device. This sensor interacts with a control of the paint shop. When the sensor detects that the displacer has reached its end position in the region of the stop device, the return operation is completed and a flushing operation of the ink supply line can be initiated.
  • the detection of the displacer is preferably carried out without contact, which can be achieved by an inductively or capacitively operating sensor.
  • the displacement body comprises an inductively detectable signal body, such as e.g. a metallic, in particular spherical core.
  • FIG. 1 shows a schematic representation of a device for painting objects with different colors.
  • the colors are introduced via circularly guided color lines 2, which emanate from a merely indicated ink supply space 4 and return to this, brought to the painting.
  • the painting device comprises a color changer 6, which is selectively connectable to each of the color lines 2.
  • a Farbzumoltechnisch 8 is provided which produces a Lackierstoff für between the color changer 6 and a spray gun 10 and a nozzle 12 of the spray gun 10.
  • various compressed air supply lines are provided, wherein a compressed air line 14 opens into the color changer 6 and another compressed air line 16 leads to the spray gun 10 and the so-called spray air for atomizing or dusting the paint in the spray operation of the spray gun 10 supplies.
  • a compressed air line 18 extends as part of a feed device 20 for a flowable medium under pressure (compressed air) to the ink supply line 8 and flows through a valve 21 in the ink feed 8.
  • one of the shut-off valves between a respective color line 2 and the color changer 6 is opened, so that the pressure prevailing in the circular color guide line propagates through the color changer 6 in the feed line 8. Since this pressure is sufficient for operating the spray gun, no further pump needs to be used and a provided in the ink supply line gear pump 22 is bypassed via a bypass line 24.
  • the gear pump 22 in Lackier Wegtechnisch below a pneumatically controllable color pressure regulator 26 is provided, which is controlled by an electrically operated 3/2-way valve or proportional valve 28 and is used to keep constant a predetermined, matched to the respective related color pressure.
  • the color pressure regulator 26 is further designed such that it can be flowed through in two flow directions.
  • ink is thus conveyed under a predeterminable supply pressure via the supply line 8 to the spray gun 10 and atomized there by means of the compressed air line 16 supplied compressed air through the nozzle 12.
  • the spray gun 10 is mounted in a gun holder 30.
  • the gun holder 30 includes a limit switch 32, which signals to a controller, not shown, the signal "gun in holder". In this position, the spray gun 10 is within the range of action of a trigger cooperating with the controller 34.
  • the controller receives the "gun in holder” signal, the bypass line 24 at the gear pump 22 is closed and the gear pump 22 is driven as the color return device 36 in that it conveys towards the color changer 6. Now 18 compressed air is given to a valve 21 via a directional control valve 38 in the compressed air line.
  • the valve 21 is a diaphragm valve, which, when a pressure is applied via the compressed air line 18, opens against the force of a spring, so that a pressure medium connection to the ink feed line 8 is produced.
  • resilient deformable displacement body 40 acted upon by the compressed air and moves in the ink supply 8 in the return direction, ie in the direction of the color changer 6.
  • the displacer 40 acts to a certain extent as a stamp and presses standing in the Farbzu réelletechnisch 8 color column to the suction side of the gear pump 22.
  • the gear pump 22 then conveys the color against the pending in the circular color lines 2 pressure in the respective color line 2 back.
  • the displacer 40 slides against the inside of the ink supply 8 and cleans them to some extent.
  • the displacement body 40 finally abuts against a stop device 42 in the form of a constriction 44 in the ink feed line 8.
  • a sensor 46 for detecting the displacement body 40 is provided. The sensor 46 operates inductively and reports, when it is passed by the displacement body 40, a corresponding signal to the controller. Then the return operation is terminated. Almost all of the paint that is between the valve 21 and the paint pressure regulator 26 or the stopper 42 for the displacer 40 has been recycled for recycling.
  • FIG. 2 shows the spray gun 10, wherein the feed device 20 is shown cut for the compressed air.
  • the compressed air line 18 opens into a transverse bore 50, which is formed in a metallic block 52 and is connected to a pressure chamber 54 of the valve 20. If that is in FIG. 1 illustrated directional control valve 38 is opened, so is compressed air at about 6 to 8 bar in the pressure chamber 54 at. As a result, a circumferentially clamped membrane 56 is deflected against a spring bias 58. As a result, a valve needle 60 connected to the diaphragm 56 is lifted off its sealing seat 62, so that a flow connection between the pressure chamber 54 and the ink supply line 8 is produced.
  • the sealing seat 62 defines an opening which opens dead space in a mold recess 64 of the ink supply 8. At the same time, as described above, if the valve needle 60 is lifted off the sealing seat 62, the displacement body 40 is pressed out of the mold recess 64 into the ink feed line 8 and travels there as far as the stop device 42, wherein the displacer 40 pushes the color column located in the ink supply line 8 to the suction side of the Zahradpumpe 22 in front of him.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Spray Control Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Nozzles (AREA)

Claims (8)

  1. Appareil pour le laquage d'objets avec différentes formes, qui sont mises à disposition dans des conduites à couleur (2) guidées de façon circulaire, chacune d'entre elles étant attribuée à une couleur, comprenant un pistolet pulvérisateur (10), une conduite d'arrivée de couleur (8), qui établit une liaison de moyen de laquage entre une conduite à couleur (2) guidée de façon circulaire et le pistolet pulvérisateur (10), un corps déplaceur (40) étant prévu pour le nettoyage de la conduite d'arrivée de couleur (8), qui peut être déplacé dans la direction du flux de laquage dans la conduite d'arrivée de couleur, caractérisé en ce que, dans la zone de l'extrémité côté pistolet pulvérisateur de la conduite d'arrivée de couleur (8), il est prévu un dispositif d'arrivée (20) pour l'arrivée d'un agent pouvant circuler sous surpression dans la conduite d'arrivée de couleur (8) et en ce que le dispositif d'arrivée (20) comprend une soupape (21), qui se raccorde sur le côté couleur sensiblement sans espace mort à la conduite d'arrivée de couleur (8), et en ce que la couleur se trouvant dans la conduite d'arrivée de couleur (8) peut être recyclée dans le sens contraire au sens du flux de laquage et en ce que, pour soutenir le recyclage de la couleur dans la conduite d'arrivée de couleur (8), le même corps déplaceur (40) souple, déformable de façon souple peut être déplacé par l'agent pouvant entrer par le dispositif d'arrivée de couleur (20) dans la conduite d'arrivée de couleur (8) dans le sens contraire au sens de flux de laquage dans le sens de recyclage et peut être reculé de nouveau en direction du pistolet pulvérisateur (10) lors du lavage consécutif de la conduite d'arrivée de couleur (8) et est réceptionné lors du laquage dans un évidement moulé (64) dans la conduite d'arrivée de couleur (8).
  2. Appareil selon la revendication 1, caractérisé en ce que le corps déplaceur (40) est prévu lors du laquage dans un évidement moulé (64) dans la conduite d'arrivée de couleur (8) dans la zone du branchement de soupape sans espace mort de la conduite d'arrivée.
  3. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans le sens de recyclage, il est prévu avant l'appareil de recyclage de couleur (22, 36) un dispositif d'arrêt (42) pour le corps déplaceur (40).
  4. Appareil selon la revendication 3, caractérisé en ce que le dispositif d'arrêt (42) est formé par un rétrécissement de section (44) dans la conduite d'arrivée de couleur (8).
  5. Appareil selon la revendication 3 ou 4, caractérisé en ce que, dans la zone de l'appareil d'arrêt (42) ou dans le sens de recyclage, il est prévu avant le dispositif d'arrêt (42) un capteur (46) pour la détection du corps déplaceur.
  6. Dispositif selon la revendication 5, caractérisé en ce que la détection du corps déplaceur (40) est réalisable sans contact.
  7. Dispositif selon la revendication 6, caractérisé en ce que le capteur (46) travaille de façon inductive ou capacitive.
  8. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps déplaceur (40) comprend un corps de signal détectable de façon inductive.
EP98104412A 1997-03-11 1998-03-11 Dispositif de changement de teinte avec sens de circulation de vernis réversible Expired - Lifetime EP0865830B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19709988A DE19709988C2 (de) 1997-03-11 1997-03-11 Lackiereinrichtung mit mehreren kreisförmig geführten Farbleitungen
DE19709988 1997-03-11

Publications (4)

Publication Number Publication Date
EP0865830A2 EP0865830A2 (fr) 1998-09-23
EP0865830A3 EP0865830A3 (fr) 2002-01-30
EP0865830B1 EP0865830B1 (fr) 2005-06-08
EP0865830B2 true EP0865830B2 (fr) 2009-09-16

Family

ID=7822967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104412A Expired - Lifetime EP0865830B2 (fr) 1997-03-11 1998-03-11 Dispositif de changement de teinte avec sens de circulation de vernis réversible

Country Status (3)

Country Link
EP (1) EP0865830B2 (fr)
DE (2) DE19709988C2 (fr)
ES (1) ES2242988T5 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59809327D1 (de) * 1997-07-03 2003-09-25 Lactec Gmbh Vorrichtung zum Lackieren
DE19817377B4 (de) * 1998-04-18 2013-01-03 Lactec Gmbh Verfahren und Vorrichtung zum Zuführen von Lack zu mindestens zwei Zerstäubern
DE19742588B4 (de) * 1997-09-26 2009-02-19 Dürr Systems GmbH Verfahren zum serienweisen Beschichten von Werkstücken
DE19805938A1 (de) * 1998-02-13 1999-08-19 Lactec Gmbh Verfahren und Vorrichtung zum Beschichten von Teilen
FR2808709B1 (fr) * 2000-05-15 2002-07-19 Eisenmann France Sarl Procede de recuperation d'un fluide de revetement, tel qu'une peinture, contenu dans une installation
DE10033986A1 (de) 2000-07-13 2002-01-24 Duerr Systems Gmbh Verfahren zur Verwendung eines Molches in einer Beschichtungsanlage und Molch hierfür
DE10115472A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Ventileinheit für eine elektrostatische Beschichtungsanlage
DE10115470A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Beschichtungsanlage mit einer Zerstäuberwechselstation
DE10115463A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage und Verfahren zu seiner Materialversorgung
DE10115467A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Werkzeugwechselsystem für eine Maschine
DE10202711A1 (de) 2002-01-24 2003-07-31 Duerr Systems Gmbh Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
DE10211244A1 (de) * 2002-03-13 2003-10-23 Lactec Ges Fuer Moderne Lackte Lackieranlage zum Aufbringen von flüssigem Beschichtungsmaterial
DE10231421A1 (de) 2002-07-11 2004-01-22 Dürr Systems GmbH Verfahren und System zur Versorgung eines Pulverbeschichtungsgerätes
DE10233198A1 (de) 2002-07-22 2004-02-05 Dürr Systems GmbH Rotationszerstäuber
DE10239516A1 (de) 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10239517A1 (de) 2002-08-28 2004-03-11 Dürr Systems GmbH Beschichtungseinrichtung mit einem Rotationszerstäuber und Verfahren zum Steuern ihres Betriebes
DE10240451A1 (de) 2002-09-02 2004-03-11 Dürr Systems GmbH Sensoranordnung für eine Beschichtungsanlage
DE10245594A1 (de) 2002-09-30 2004-04-08 Dürr Systems GmbH Verfahren zur Kollisionserkennung
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings
DE102004015417A1 (de) * 2004-03-26 2005-10-13 Putzmeister Ag Vorrichtung und Verfahren zur Reinigung einer Dickstoffförderleitung
DE102004038017B4 (de) * 2004-08-04 2012-07-12 Wolfgang Schmidt Verfahren und Anlage zum zeitlich nacheinander erfolgenden Austrag unterschiedlicher Beschichtungsmaterialien
DE102004042512A1 (de) * 2004-09-02 2006-03-30 Hydac Accessories Gmbh Ventilvorrichtung
US8671495B2 (en) 2006-11-06 2014-03-18 Durr Systems, Inc. Scraper pig
DE102008047118B4 (de) * 2008-09-15 2024-02-01 Dürr Systems Ag Lackieranlagenbauteil

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US2258174A (en) † 1940-01-22 1941-10-07 Chawner William Rupert Apparatus for cleaning conduits
DE9110650U1 (de) † 1990-09-25 1991-10-24 Streit AG Lack- und Farbenfabrik, Frauenfeld Selbstreinigende Spritzeinrichtung in einem Farbspritzstand für das Lackieren von Gegenständen; sowie hierfür geeignete Spritzpistole
DE4035435C1 (en) † 1990-11-08 1992-03-19 Bayer Ag, 5090 Leverkusen, De Transfer station of pipeline - incorporates by=pass and pig trap system

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US2258174A (en) † 1940-01-22 1941-10-07 Chawner William Rupert Apparatus for cleaning conduits
DE9110650U1 (de) † 1990-09-25 1991-10-24 Streit AG Lack- und Farbenfabrik, Frauenfeld Selbstreinigende Spritzeinrichtung in einem Farbspritzstand für das Lackieren von Gegenständen; sowie hierfür geeignete Spritzpistole
DE4035435C1 (en) † 1990-11-08 1992-03-19 Bayer Ag, 5090 Leverkusen, De Transfer station of pipeline - incorporates by=pass and pig trap system

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Title
ING. H.-D. KLUDUS: "Möglichkeiten und Grenzen der Molchtechnik", CHEMIE-TECHNIK, May 1995 (1995-05-01), HEIDELBERG †

Also Published As

Publication number Publication date
DE19709988C2 (de) 2002-01-24
EP0865830A2 (fr) 1998-09-23
EP0865830B1 (fr) 2005-06-08
DE59812844D1 (de) 2005-07-14
EP0865830A3 (fr) 2002-01-30
ES2242988T5 (es) 2009-12-14
DE19709988A1 (de) 1998-10-01
ES2242988T3 (es) 2005-11-16

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