EP0684080A1 - Dispositif de pulvérisation électrostatique - Google Patents

Dispositif de pulvérisation électrostatique Download PDF

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Publication number
EP0684080A1
EP0684080A1 EP95103454A EP95103454A EP0684080A1 EP 0684080 A1 EP0684080 A1 EP 0684080A1 EP 95103454 A EP95103454 A EP 95103454A EP 95103454 A EP95103454 A EP 95103454A EP 0684080 A1 EP0684080 A1 EP 0684080A1
Authority
EP
European Patent Office
Prior art keywords
carrier
gun barrels
spray
fluid
spray device
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.)
Ceased
Application number
EP95103454A
Other languages
German (de)
English (en)
Inventor
Karl Buschor
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.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland GmbH
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 Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP0684080A1 publication Critical patent/EP0684080A1/fr
Ceased 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
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
    • 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
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • 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
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0876—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form parallel jets constituted by a liquid or a mixture containing a liquid

Definitions

  • the invention relates to an electrostatic spray device for coating material for spray coating objects.
  • Powdery material is preferably used as the coating material, but liquid coating material can also be used.
  • electrostatic spray coating the coating material is electrostatically charged by high-voltage electrodes immediately before or after spraying.
  • the high-voltage electrodes are connected to a high-voltage generator, which generates a high voltage of, for example, 100 kV. However, other voltages in the range from 30 to 140 kV are also known.
  • the pistol barrel and the carrier are detachably connected to one another and designed in such a way that the same pistol barrel can optionally be attached to a pistol grip or to a carrier which can be attached to a robot.
  • the gun barrel and the carrier are detachably connected to one another by a plug connection, wherein they are designed such that when they are plugged together, fluid lines and electrical lines that pass through them are also connected to one another.
  • the object of the invention is to use a plurality of spray nozzles to simultaneously coat an object with coating material without fluid lines and / or electrical lines being able to disrupt movements of the spray nozzles or touching the object.
  • a high level of efficiency material layers that are sufficiently thick, little or no loss of coating material
  • good coating quality and a quick color change (coating material change) are to be achieved.
  • the electrostatic spraying device according to the invention shown in the drawings is used for spray coating objects 2 with powdered coating material and consists essentially of a carrier 4 and at least two gun barrels 6 and 8.
  • the number of gun barrels 6 and 8 is arbitrary, for example, sixteen gun barrels be provided.
  • the rear end sections of the pistol barrels 6 and 8 and the first carrier side 10 opposite them can be designed in a stepped manner, as shown in the drawings and described in the aforementioned patent specifications.
  • the gun barrels 6 and 8 can be fastened to the single carrier 4 quickly and without shaking, without the need for large-volume elements.
  • the gun barrels 6 and 8 are each provided with at least one spray nozzle 12 and one high-voltage electrode 14 at their front end sections.
  • An internal fluid channel 16 leads through the gun barrels 6 and 8 for supplying coating material to the spray nozzle 12 and an internal electrical circuit part 18 for supplying power to the high-voltage electrode 14 in the longitudinal direction of the gun barrels.
  • a second internal fluid channel 20 extends in the longitudinal direction through the gun barrels 6 and 8, via which compressed air is supplied to the electrodes 14, which flushes around the electrodes and thereby keeps them free of coating material and transfers electrically charged particles from the electrode into the coating material, so that the latter is electrostatically charged and attracted to the object 2 to be coated, which is connected to earth potential or another electrical potential which is different from the electrical potential of the high-voltage electrode 14.
  • first connecting fluid channels 22 and 24 for the supply of the first internal fluid channels 16 of the gun barrels 6 and 8 with coating material therethrough.
  • the coating material is powder and these first internal fluid channels can therefore also be referred to as powder channels.
  • second connecting channels 26 and 28 lead through the carrier to supply the second internal fluid channels with compressed air for the high-voltage electrodes 14, so that these second internal fluid channels can also be referred to as compressed air channels.
  • electrical connection circuit parts 30 and 32 are passed through the carrier 4 for the electrical energy supply of the internal electrical circuit parts 18 accommodated in the gun barrels 6 and 8.
  • connection fluid channels 22, 24, 26 and 28 as well as the electrical connection circuit parts 30 and 32 extend through the carrier 4 from the first carrier side 10 to a second carrier side 34 facing away from it.
  • connection fluid channels 22, 24, 26, 28 and the connection circuit parts 30, 32 are on the first carrier side 10 via attachable or pluggable first connection means 40, 42, 44 and 46 with the internal fluid channels 16 and 20 and the internal circuit parts 18 the gun barrels 6 and 8 are detachably mechanically and functionally connected, wherein they are automatically connected when the gun barrels 6 and 8 are plugged onto the carrier 4 via longitudinal plug connections 48.
  • the one connection fluid channels 22, 24 are each with at least one coating material fluid line 54, 56 and the other connection fluid lines 26, 28 are each with at least one compressed air line 58, 60 per gun barrel 6, 8 on the second carrier side 34 via first quick connection means 50 such as plug connections or screw connections or plug-screw connections detachably mechanically and functionally connected.
  • connection circuit parts 30 and 32 of the carrier 4 are detachably mechanically and functionally connected on the second carrier side 34 via second quick connection means 52, such as plug connections, screw connections or plug-screw connections, to at least one electrical power supply line 62, 64 per gun barrel 6, 8.
  • All external fluid lines 54, 56, 58, 60 and external electrical power supply lines 62, 64 extend in the longitudinal direction of the gun barrels 6 and 8, but in opposite directions away from the carrier 4 and are at least at their end sections connected to the carrier 4 into one Conductor bundles summarized by being passed through a channel 66 of a robot arm 68 in the longitudinal direction of the arm.
  • the channel 66 extends in the longitudinal direction of the arm through the robot arm 68 to the carrier 4.
  • the carrier 4 is detachably fastened to the robot arm 68 by means of quick-release fastening means 70.
  • An electrically conductive metal plate 72 is attached to the carrier 4 on its second carrier side 34, to which elements of the carrier 4, the gun barrels 6 and 8 and the robot arm 68 to be grounded are electrically connected.
  • the metal plate 72 is arranged on the carrier 4 in such a way that it automatically abuts the electrically conductive robot arm 68 and forms an electrical connection with it when the carrier 4 is attached to the robot arm 68.
  • the internal electrical circuit part 18 contains in each gun barrel 6, 8 a high-voltage generator 74, 76, which converts a low voltage supplied via the external power supply line 62, 64 into the high voltage required for the high-voltage electrodes 14.
  • the high voltage generators 74, 76 are not in the gun barrels 6 and 8, but in the carrier 4, as is shown schematically by reference numbers 74/2 and 76/2.
  • the high voltage generators 74, 76 can be replaced by external high voltage generators which are arranged outside the gun barrels 6, 8 and outside the carrier 4, so that the high voltage must be supplied to the high voltage electrodes 14 via the external electrical power supply lines 62 and 64 .
  • One of the external fluid lines for example a fluid line 78, can be used for supplying rinsing liquid for rinsing the channels which are used for supplying coating material.
  • the robot arm 68 moves the carrier 4 with the gun barrels 6 and 8 relative to it coating object 2.
  • the object 2 can be moved horizontally and the carrier 4 with the gun barrels 6 and 8 vertically.
  • movement of the carrier 4 with the gun barrels 6, 8 in the horizontal direction relative to the object 2 to be coated is possible by means of the robot arm 68.
  • the spray nozzles 12 are designed as slot nozzles and their slots 80, seen in the front view shown in FIG. 3, run parallel to one another and at the same time at an angle 82 which is substantially different from zero degrees and 90 degrees, for example at an angle from 45 degrees to a theoretical line 84 on which the axial nozzle centers 86 are arranged.
  • an angle 82 which is substantially different from zero degrees and 90 degrees, for example at an angle from 45 degrees to a theoretical line 84 on which the axial nozzle centers 86 are arranged.
  • the carrier 4 has on its first carrier side 10 a recessed upper end face 88 and a front lower end face 90.
  • a separate supply of coating material and high voltage is provided for each gun barrel 6 and 8.
  • a central coating material supply line and / or a central electrical energy supply line could also be connected as an external line to the carrier 4 for all gun barrels, in which case corresponding distribution channels are formed in the carrier 4, which lead to the gun barrels 6 and 8.
  • the holding device 68 can be a handle instead of a robot, so that the carrier 4 with the gun barrels 6 and 8 can be used by hand.
  • the lines have a lower resistance to movements of the carrier 4 relative to an object 2 to be coated as in 4 different directions or with differently sized arches from the carrier 4 lines protruding.
  • the line ends located away from the carrier 4 are each arranged in a stationary manner in the robot or in a control cabinet or other control system. This interference-free mobility of the carrier 4 and the pistol barrels 6 and 8 prevents movement surges. Avoiding movement impacts is important so that a good spray pattern and thus a good coating quality can be achieved.
  • the spray nozzle 12 is attached to the front end of the gun barrel 8 via an angle piece 92.
  • a spray nozzle 12 is attached to the other gun barrel 6, not shown, via an angle piece 92.
  • One leg 94 of the angle piece is arranged in the longitudinal direction of the associated gun barrel 6 or 8, and the other leg 96 is arranged in the spray direction of the associated spray nozzle 12.
  • the angle piece 92 is rotatable relative to the associated gun barrel 6 or 8 about the gun barrel longitudinal axis 97.
  • the spray nozzle 12 is rotatable about its spray axis or longitudinal axis 98 relative to the angle piece 92.
  • the spray jet can be directed in different directions and set as a flat jet to different flat jet angles 82.
  • large areas, corners, angles and hidden areas e.g. behind a wall, an object.
  • a plurality of pistol barrels 6 and 8 are detachably attached to the carrier 4, which together with the carrier 4 form a number of spray pistols corresponding to the number of pistol barrels 6 and 8, which can be operated independently or as a function of one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Spray Control Apparatus (AREA)
EP95103454A 1994-05-26 1995-03-10 Dispositif de pulvérisation électrostatique Ceased EP0684080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4418288 1994-05-26
DE4418288A DE4418288A1 (de) 1994-05-26 1994-05-26 Elektrostatische Sprühvorrichtung

Publications (1)

Publication Number Publication Date
EP0684080A1 true EP0684080A1 (fr) 1995-11-29

Family

ID=6518955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103454A Ceased EP0684080A1 (fr) 1994-05-26 1995-03-10 Dispositif de pulvérisation électrostatique

Country Status (5)

Country Link
US (1) US5636798A (fr)
EP (1) EP0684080A1 (fr)
JP (1) JP2588693B2 (fr)
CA (1) CA2148203A1 (fr)
DE (1) DE4418288A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19546970B4 (de) * 1995-12-15 2006-08-17 Itw Gema Ag Pulversprühvorrichtung zur elektrostatischen Sprühbeschichtung
DE19646277A1 (de) * 1996-11-09 1998-05-14 Itw Oberflaechentechnik Gmbh Sprühbeschichtungseinrichtung
US5850976A (en) 1997-10-23 1998-12-22 The Eastwood Company Powder coating application gun and method for using the same
DE19828130A1 (de) * 1998-06-25 1999-12-30 Smr De Haan Gmbh Elektrostatisches Sprühsystem
DE19963491A1 (de) * 1999-12-28 2001-07-05 Alstom Power Schweiz Ag Baden Verfahren zur Herstellung einer hochwertigen Isolierung von elektrischen Leitern oder Leiterbündeln rotierender elektrischer Maschinen mittels Sprühsintern
DE20005067U1 (de) 2000-03-20 2000-06-21 Range und Heine GmbH, 72116 Mössingen Vorrichtung zum Beschichten von Werkstücken
JP5048906B2 (ja) * 2000-06-19 2012-10-17 ロス オペレーティング バルブ カンパニー 本質的に安全なマイクロプロセッサー制御圧力調整器
US6817553B2 (en) * 2003-02-04 2004-11-16 Efc Systems, Inc. Powder paint spray coating apparatus having selectable, modular spray applicators
US7793869B2 (en) 2003-08-18 2010-09-14 Nordson Corporation Particulate material applicator and pump
EP1658142B2 (fr) † 2003-08-18 2014-10-22 Nordson Corporation Pulverisateur pour materiau particulaire
JP2005246189A (ja) * 2004-03-03 2005-09-15 Ransburg Ind Kk 静電塗装機
US9221066B2 (en) 2013-11-13 2015-12-29 Honda Motor Co., Ltd. Multi-head electrostatic painting apparatus
CN104772240B (zh) * 2015-03-24 2017-03-15 浙江大学 用于治理大气污染的多功能静电喷水雾机
DE102015110312B4 (de) 2015-06-26 2019-08-01 Gema Switzerland Gmbh Pulverweiche und Pulverabgabesystem mit Pulverweiche
CN107262320B (zh) * 2017-06-26 2023-08-29 中信戴卡股份有限公司 一种混线式轮毂螺栓孔自动清粉系统及组合式清粉枪
US10799905B2 (en) 2018-01-30 2020-10-13 Ford Motor Company Ultrasonic material applicators and methods of use thereof

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FR2553006A1 (fr) * 1983-10-11 1985-04-12 Sames Sa Dispositif de projection a debit relativement grand de produit de revetement
US4798341A (en) * 1987-09-28 1989-01-17 The Devilbiss Company Spray gun for robot mounting
US5071074A (en) * 1990-02-12 1991-12-10 Graeco Inc. Angled spray gun
US5320283A (en) * 1993-01-28 1994-06-14 Nordson Corporation Robot mounted twin headed adjustable powder coating system with spray pattern direction control

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JPH0550015A (ja) * 1991-08-09 1993-03-02 Kobe Steel Ltd 塗装方法
DE4126891A1 (de) * 1991-08-14 1993-02-18 Gema Volstatic Ag Elektrostatische pulver-spruehbeschichtungsanlage fuer automobil-karosserien
NL9101939A (nl) * 1991-11-20 1993-06-16 Meino Jan Van Der Woude Hydraulische robot-spuitlans.
DE4242715C2 (de) * 1991-12-17 2000-05-31 Krautzberger Gmbh Adapter mit Regelventil für automatische Material-Spritzvorrichtung
JPH05302429A (ja) * 1992-02-26 1993-11-16 Shimizu Corp 吹付け装置および吹付け施工法
DE4227455C2 (de) * 1992-08-19 1996-04-04 Wagner Int Vorrichtung zum elektrostatischen Nachbeschichten der Innenflächen von Schweißnähten

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228958A (en) * 1979-07-27 1980-10-21 General Motors Corporation Air-operated spray device
FR2553006A1 (fr) * 1983-10-11 1985-04-12 Sames Sa Dispositif de projection a debit relativement grand de produit de revetement
US4798341A (en) * 1987-09-28 1989-01-17 The Devilbiss Company Spray gun for robot mounting
US5071074A (en) * 1990-02-12 1991-12-10 Graeco Inc. Angled spray gun
US5320283A (en) * 1993-01-28 1994-06-14 Nordson Corporation Robot mounted twin headed adjustable powder coating system with spray pattern direction control

Also Published As

Publication number Publication date
CA2148203A1 (fr) 1995-11-27
JP2588693B2 (ja) 1997-03-05
JPH07313907A (ja) 1995-12-05
US5636798A (en) 1997-06-10
DE4418288A1 (de) 1995-11-30

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