EP1119419A2 - Dispositif de peinture pour peinture en poudre - Google Patents

Dispositif de peinture pour peinture en poudre

Info

Publication number
EP1119419A2
EP1119419A2 EP00964002A EP00964002A EP1119419A2 EP 1119419 A2 EP1119419 A2 EP 1119419A2 EP 00964002 A EP00964002 A EP 00964002A EP 00964002 A EP00964002 A EP 00964002A EP 1119419 A2 EP1119419 A2 EP 1119419A2
Authority
EP
European Patent Office
Prior art keywords
powder coating
coating
storage
buffer
powder
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.)
Withdrawn
Application number
EP00964002A
Other languages
German (de)
English (en)
Inventor
Erich Meyer
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.)
Eisenmann Lacktechnik KG
Original Assignee
Eisenmann Lacktechnik KG
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 Eisenmann Lacktechnik KG filed Critical Eisenmann Lacktechnik KG
Publication of EP1119419A2 publication Critical patent/EP1119419A2/fr
Withdrawn legal-status Critical Current

Links

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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material

Definitions

  • the invention relates to a coating device for powder coating according to the preamble of claim 1.
  • Such a painting device is known from the market.
  • the powder coating is applied with a dispenser, e.g. a possibly rotating atomizer nozzle, which is attached to a robot, applied to the workpiece.
  • the powder coating is fed to the atomizer nozzle from a coating reservoir with the aid of a conveyor.
  • This paint store is generally a larger container, which is in a separate room from the painting chamber.
  • the distance that the powder coating must travel from the paint storage to the delivery device is therefore long. This has the disadvantage that the regulation of the amount dispensed is relatively slow and the uniformity of the powder application is therefore not optimal. Furthermore, the painting process must be interrupted each time the paint reservoir is empty and has to be refilled.
  • the object of the present invention is therefore to further develop a painting device of the type mentioned at the outset in such a way that operational reliability is increased, the controllability is improved and the system can be operated continuously.
  • the buffer memory according to the invention solves several problems at the same time. On the one hand, such a large amount of paint powder can be stored in it that the painting device can continue to be operated even when the paint storage is empty and has to be refilled. This ensures continuous operation of the painting device.
  • the fact that the buffer store has its own conveying device with which the powder coating is conveyed to the dispensing device and the coating store has its own conveying device with which the powder coating only has to be conveyed to the buffer storage means that the distance to be covered by the respective conveying device is shorter , so that the pressure losses are lower and the controllability of the amount dispensed in the painting device according to the invention is improved. Overall, a more uniform and optimal painting result can be achieved.
  • the ratio of the installed maximum delivery rates of the paint storage conveyor on the one hand and the delivery device on the other hand ensures that there is always sufficient powder coating in the buffer store (the maximum installed delivery rate is understood as the maximum delivery rate that can be achieved by the respective component. In operation, the actual Delivery capacity may also be lower).
  • the buffer store is overflowed by the further education prevented according to claim 2.
  • a level sensor cooperates with the paint storage conveyor.
  • this can emit a signal to a controller which regulates the conveying capacity of the paint storage conveying device or, if necessary, reduces it so that a maximum permissible level in the buffer storage is not exceeded.
  • a simple limitation of the maximum level of the powder coating in the buffer store is specified in the development according to claim 4.
  • excess powder coating is simply returned from the buffer storage to the coating storage.
  • the paint storage conveying device can even be operated constantly at maximum conveying capacity without fear of overflowing the buffer storage.
  • the return line on the buffer store is arranged at such a height that excess powder coating can be returned from the buffer store to the paint store according to the "overflow principle" through the return line.
  • the painting device as is customary in automobile construction, for example, is arranged on a robot with a stationary and a moving part, this is appropriate 7 the stationary part of the robot in an advantageous manner for placing the buffer store, because from there the distance to the dispensing device arranged on the movable part of the robot is only relatively short.
  • the development of the invention according to claim 8 represents a particularly simple and safe way of transporting the powder coating from the paint store to the buffer store and from there to the dispenser.
  • the term "fluidization" of the powder coating is understood to mean that the powder coating is kept in a floating state within a gas volume and is transported with the gas flow.
  • Figure 1 a partially schematic representation of a painting device
  • FIG. 2 is a detailed view of the buffer memory of the painting device of Figure 1.
  • a coating device for powder coating is generally designated by the reference numeral 10. It comprises a dispensing device designed as an atomizer nozzle 12, which is directed towards a workpiece 14 which is shown schematically in the figure as a vehicle body.
  • the painting device 10 further comprises a robot 16, a paint store 18 and a buffer store 20.
  • the paint store 18 is located in a remotely located room (not shown), whereas the buffer store 20 is arranged in the painting chamber, also not shown, in the immediate vicinity of the robot 16 is.
  • a paint storage Conveyor 22 there is a paint storage Conveyor 22, a buffer storage conveyor 24 and a return conveyor 26 are provided.
  • the robot 16 comprises a stationary part 28 which is connected to the floor 30 of the painting chamber.
  • a swivel arm 32 is fastened in the upper region of the stationary part 28.
  • the pivot axis of the pivot arm 32 is perpendicular to the image plane.
  • a spray arm 34 is fastened, which can pivot about an axis relative to the swivel arm 32, which lies perpendicular to the image plane of FIG. 1.
  • the atomizer nozzle 12 is attached to the spray arm 34 at an angle of approximately 45 downwards.
  • the atomizing nozzle 12 is opposite the spray arm 34 from the
  • Image plane of the figure can be pivoted about an axis 36.
  • the robot 16 and the servomotors (not shown) of the swivel arm 32, the spray arm 34 and the atomizing nozzle 12 are connected to a controller (not shown).
  • the conveying devices 22, 24 and 26 are conveying devices working with compressed air, which are acted upon from a compressed air store 38.
  • the paint storage conveying device 22 comprises a metering air line 40 and a conveying air line 42, both of which, on the one hand, have a connecting piece 43 on the top of the paint storage 18 and, on the other hand, via control valves 44 and 46 controlled by the control (not shown) Air reservoir 38 are connected.
  • the paint storage conveying device 22 further comprises a powder paint supply line 48, which leads from the connecting piece 43 on the upper side of the paint storage 18 to the buffer storage 20.
  • the buffer storage conveying device 24 also comprises a metering air line 50 and a conveying air line 52, which on the one hand has a connection piece 54 on the top of the buffer storage 20 (see FIG. 2) and on the other hand by means of control valves 56 and 58 controlled by the control the compressed air reservoir 38 are connected.
  • a powder discharge line 60 leads from the nozzle 54 to the atomizing nozzle 12.
  • the return conveying device 26 also comprises a metering air line 62 and a conveying air line 64, which are connected on the one hand to a connection 66 on the buffer store 20 and on the other hand to the compressed air store 38 via control valves 68 and 70 controlled by the control.
  • a powder paint return line 72 leads from the nozzle 66 back to the paint store 18.
  • the compressed air accumulator 38 is connected to the underside of the buffer accumulator 20 via a control valve 74 controlled by the control and a compressed air line 76.
  • All control valves 44, 46, 56, 58, 68, 70 and 74 are connected to the control, not shown, via control lines, not shown.
  • the lines 40, 42, 48, 50, 52, 60, 62, 64, 72 and 76 can be rigid channels or flexible hose lines.
  • a disc-shaped, gas-permeable fluid base 84 is arranged in the interior of the cylinder 78, spaced apart from the lower end face 80, the outer jacket (without reference number) of which works closely with the inner wall of the cylinder 78.
  • the fluid base 84 can be a small-pored metal grid, a gas-permeable ceramic or the like.
  • the fluid base 84 can be rigidly attached to the wall of the cylinder 78 or can be held in a sliding manner relative to the latter.
  • the interior of the cylinder 78 is divided by the fluid floor 84 into a pressure space 86 below the fluid floor 84 and a powder space 88 above the fluid floor 84.
  • In the lower end face 80 of the cylinder 78 there is an inlet 90 into which the compressed air line 76 opens.
  • the connector 54 is attached to the upper end face 94 of the cylinder 78. From it, a suction pipe 96 extends in the longitudinal direction of the cylinder 78 down to the vicinity of the fluid base 84. On the side opposite the inlet 92, the nozzle 66 is arranged on the lateral surface of the cylinder 78. Its vertical position is between that of the inlet 92 and the upper end face 94 of the cylinder 78. The connector 66 also communicates with the interior of the cylinder 78.
  • the painting device 10 is operated as follows:
  • the paint reservoir 18 is filled with powder paint.
  • the controller controls the valves 44 and 46 so that powder coating from the coating reservoir 18 passes through the powder coating supply line 48 and the inlet 92 into the powder chamber 88 of the cylinder 78 of the buffer storage 20 and this is filled with powder coating.
  • the valve 74 is opened so that compressed air reaches the pressure chamber 86 of the cylinder 78 of the buffer store 20 via the line 76 and the inlet 90.
  • the compressed air passes through the pores or openings of the fluid base 84 into the powder space 88 and causes the paint powder (not shown) in the powder space 88 to be kept in a fluidized state.
  • control valves 56 and 58 are controlled in such a way that metering air and conveying air are supplied through lines 50 and 52, powder coating is sucked in via suction pipe 96 and conveyed through powder discharge line 60 to atomizing nozzle 12.
  • the servomotors of the swivel arm 32, the spray arm 34 and the atomizing nozzle 12 are controlled in such a way that the powder coating is delivered to the workpiece 14 in the desired manner.
  • CD rt CD P rt CQ fD? ⁇ 3 s; rt CQ fD CD ti P l-h - fD fD Mi Mi 3 H (D fD fD M L ⁇ ) fD fD ⁇ - 0 ⁇ - fD TJ ⁇ - ⁇ .
  • Storage 20 existing powder coating is namely sufficient to bridge the time period which is necessary to fill the coating storage 18 again with powder coating.
  • the buffer store 20 thus enables the painting device 10 to be operated continuously, which improves the economy of the system and also the painting result.

Landscapes

  • Spray Control Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)

Abstract

Dans les dispositifs de peinture pour peinture en poudre classiques, le réglage du débit s'effectue de manière relativement lente en raison de la distance importante qui sépare le réservoir de peinture de l'élément de distribution. En outre, le fonctionnement doit être interrompu lors de la recharge du réservoir de peinture. La présente invention a pour objet la mise en place d'un réservoir d'accumulation (20) au voisinage de l'élément de distribution (12). Ledit réservoir d'accumulation est plus petit que le réservoir de peinture (18) et est alimenté par ce dernier en peinture en poudre via un élément d'acheminement réservoir de peinture (22). La peinture en poudre est ensuite acheminée du réservoir d'accumulation (20) à l'élément de distribution (12) via un élément d'acheminement réservoir d'accumulation. La capacité d'acheminement maximale de l'élément d'acheminement réservoir de peinture (22) est supérieure à celle de l'élément de distribution (12) de sorte que le réservoir d'accumulation (20) se trouve constamment alimenté.
EP00964002A 1999-08-07 2000-08-04 Dispositif de peinture pour peinture en poudre Withdrawn EP1119419A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1999137425 DE19937425A1 (de) 1999-08-07 1999-08-07 Lackiervorrichtung für Pulverlack
DE19937425 1999-08-07
PCT/EP2000/007594 WO2001010566A2 (fr) 1999-08-07 2000-08-04 Dispositif de peinture pour peinture en poudre

Publications (1)

Publication Number Publication Date
EP1119419A2 true EP1119419A2 (fr) 2001-08-01

Family

ID=7917638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00964002A Withdrawn EP1119419A2 (fr) 1999-08-07 2000-08-04 Dispositif de peinture pour peinture en poudre

Country Status (4)

Country Link
EP (1) EP1119419A2 (fr)
CA (1) CA2346147A1 (fr)
DE (1) DE19937425A1 (fr)
WO (1) WO2001010566A2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115470A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Beschichtungsanlage mit einer Zerstäuberwechselstation
DE10115467A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Werkzeugwechselsystem für eine Maschine
DE10115472A1 (de) 2001-03-29 2002-10-10 Duerr Systems Gmbh Ventileinheit für eine elektrostatische Beschichtungsanlage
DE10115463A1 (de) 2001-03-29 2002-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage und Verfahren zu seiner Materialversorgung
DE10202711A1 (de) 2002-01-24 2003-07-31 Duerr Systems Gmbh Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
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
DE102004059870B4 (de) * 2004-12-13 2011-06-22 EISENMANN Anlagenbau GmbH & Co. KG, 71032 Verfahren und Anlage zur Beschichtung von Gegenständen
US8671495B2 (en) 2006-11-06 2014-03-18 Durr Systems, Inc. Scraper pig
DE102008016395A1 (de) * 2008-03-29 2009-10-08 Eisenmann Anlagenbau Gmbh & Co. Kg Vorlagebehälter für pulverförmige Medien, Anlage zum Fördern von pulverförmigen Medien sowie Verfahren zum Betreiben einer solchen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684874A (en) * 1951-06-22 1954-07-27 Schori Metallising Process Ltd Apparatus for the spraying of pulverulent materials
US4500038A (en) * 1982-11-01 1985-02-19 Avco Corporation Powder feed system with recirculator for plasma spray apparatus
CH674951A5 (fr) * 1988-02-26 1990-08-15 Castolin Sa

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0110566A2 *

Also Published As

Publication number Publication date
WO2001010566A2 (fr) 2001-02-15
WO2001010566A3 (fr) 2001-05-10
DE19937425A1 (de) 2001-03-15
CA2346147A1 (fr) 2001-02-15

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