EP0618014A1 - Elektrostatische Farbspritzanlage - Google Patents

Elektrostatische Farbspritzanlage Download PDF

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Publication number
EP0618014A1
EP0618014A1 EP94400699A EP94400699A EP0618014A1 EP 0618014 A1 EP0618014 A1 EP 0618014A1 EP 94400699 A EP94400699 A EP 94400699A EP 94400699 A EP94400699 A EP 94400699A EP 0618014 A1 EP0618014 A1 EP 0618014A1
Authority
EP
European Patent Office
Prior art keywords
machine according
sprayer
spraying machine
sprayers
coating product
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
EP94400699A
Other languages
English (en)
French (fr)
Other versions
EP0618014B2 (de
EP0618014B1 (de
Inventor
Pierre Ehinger
Patrice Gory
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.)
Sames Kremlin SAS
Original Assignee
Sames SA
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 Sames SA filed Critical Sames SA
Publication of EP0618014A1 publication Critical patent/EP0618014A1/de
Application granted granted Critical
Publication of EP0618014B1 publication Critical patent/EP0618014B1/de
Publication of EP0618014B2 publication Critical patent/EP0618014B2/de
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
    • 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
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • 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
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the objects being vehicle components, e.g. vehicle bodies

Definitions

  • the invention relates to a machine for spraying coating product electrostatically onto objects such as motor vehicle bodies.
  • the bodies are moved by a conveyor and the coating product projection machine comprises a gantry supporting a horizontal beam perpendicular to the path of the bodies, this beam carries one or more sprayers of coating product, for example rotary type.
  • These machines sometimes called roof machines, are of capital importance for the recovery of objects to be painted, in particular when these objects have many substantially horizontal surfaces such as the hood, the roof, the trunk of a vehicle body. automobile.
  • the complexity of implementing these machines lies mainly in the supply of coating product and air to the sprayers while they are susceptible to large amplitude movements. Indeed, long lengths of pipe are to be expected and the positioning of the control members in reduced spaces is most often difficult. In addition, the projectors being brought to high voltage, it is necessary to sufficiently isolate them from any object at ground potential.
  • the prior art electrostatic spraying machines generally comprise three sprayers carried by a metal beam and supplied with coating product from one or more blocks for changing the coating product located in the vicinity of the machine and in voltage from one or more voltage raising units (high voltage units) also located in the vicinity of the machine.
  • the invention relates to a machine for spraying coating product by electrostatic means, of the type comprising a hollow beam arranged horizontally above objects to be covered and carrying at least one coating product sprayer, characterized in that this beam is made of insulating material.
  • This construction of the hollow beam of the electrostatic spraying machine makes it possible to isolate the sprayers brought to high voltage from their supply systems. Thanks to this invention, it is possible to use one or more blocks for changing the coating product on board the beam, although these blocks must be permanently brought to earth potential, in particular if they include electric or electronic regulation. In addition, for environmental protection reasons, electrostatic painting installations are increasingly working with water-soluble paints; These water-based paints have the important characteristic of being electrically conductive. When using these paints, it is imperative to isolate the coating product change block and its numerous high-voltage supply pipes, otherwise the paint column will short-circuit. The invention allows this insulation in combination with an electrical and fluid separator and an intermediate tank placed between the coating product change block and the sprayer.
  • the geometry of the hollow beam section makes it possible to define several conduits whose contents can be brought to different potentials. It also makes it possible to provide sufficiently long ramp paths between the ground parts and the high voltage parts.
  • the insulating plastic material used for example an epoxy resin, allows a significant weight gain on the beam, which is advantageous for the dimensioning of the motors and of the drive systems of the beam, for transport and installation. of it.
  • the electrostatic coating product projection machine of FIG. 1 essentially consists of two posts 1 and 2, two carriages 3 and 4, a hollow beam 5 intended to move over objects, in the 'example of automobile bodies, carried by a conveyor 6.
  • the two carriages 3 and 4 are, in a manner known per se, moved vertically along rails arranged on the posts 1 and 2.
  • the beam 5 can rotate around its horizontal axis 7 shown in phantom, thanks to two bearings 8 and 9 ensuring the mechanical connection respectively with the carriages 3 and 4.
  • Three sprayers 11, 12 and 13, supplied by three blocks for changing the coating product 21, 22 and 23 and by three voltage elevation units 31, 32 and 33 are susceptible to displacement parallel to axis 7 with an amplitude of approximately 100 mm. They can thus carry out the sweeping and width-adjusting movements necessary to obtain a uniform surface finish.
  • Three electrical flow meters 81, 82, 83 placed respectively downstream of the coating product change blocks 21 to 23 make it possible to control the proper functioning of the sprayers 11 to 13.
  • This epoxy resin beam has a one-piece structure obtained by molding. It has a generally square section and is provided with stiffening ribs 101 and 102 in the plane of its upper face. These ribs 101 and 102 guarantee good torsional and flexural rigidity of the hollow beam 5.
  • the internal space of the hollow beam 5 is divided longitudinally by a wall 104 into two conduits 105 and 106. The monobloc nature of the structure of the hollow beam 5 eliminates the risks of electrical creeping at the junction of the wall 104 with the sides of the hollow beam.
  • the upper conduit 105 can be housed all the pipes for supplying the coating product 110 and the rinsing product 111 of the coating product change blocks. In the conventional case of a block of 24 shades, 24 arrivals and 24 returns of coating product are provided per block of change of coating product. In addition to the rinse aid hoses, 144 coating hoses must therefore be housed. As these pipes, possibly grouped in bundles, are housed in a single duct, maintenance operations are simplified because no motor, flow meter or reinforcement clogs up the duct 105. The electrical supply of the voltage raising units 31 to 33 and flowmeters 81 to 83 is supplied by low voltage electric cables 112 also housed in the conduit 105.
  • the air supply pipes 113 of the sprayers 11 to 13 and of the coating product change blocks 21 to 23 are housed in the lower conduit 106.
  • the separation between the pneumatic supplies and the supplies of coating product is appreciable for the maintenance.
  • a cover made of insulating plastic material consists of three longitudinal parts 121, 122 and 123 fixed to the end of the ribs 101 and in line with the underside of the hollow beam 5. It protects the elements 21 to 23, 31 to 33 and 81 to 83 field and paint line returns. It also improves the aerodynamics of the beam in order to minimize the disturbances induced by it on the ventilation of the cabin. It is also made of epoxy resin.
  • the sprayers 11 to 13 are at high voltage while the pipes 110 and 111 are grounded and the cables 112 are at a much lower potential. High voltage creep should therefore be avoided.
  • the geometry of the section of the beam is particularly advantageous here. Indeed, the shortest ramp path between the sprayers and the parts to the ground or to the low voltage, is perpendicular to the axis 7 and follows the outside of the hollow beam 5; in particular it passes through the end of the ribs 101 and 102, which guarantees a sufficient length to avoid the creep of the high voltage. In addition, it is easy to adapt this length by more or less lengthening the ribs 101 and 102 which intervene twice in this creeping path.
  • the pipe 43 connecting the coating product change block 23 to the sprayer 13 is flexible and housed in an unwinder 53, insulating and flexible, allowing the end of this pipe 43 to follow the horizontal movement of the sprayer 13.
  • the unwinder 53 passes through a window formed between the two conduits 105 and 106.
  • the length of the hose 43 is less than one meter, which minimizes losses with each change of coating product.
  • the high voltage cable 63 connecting the voltage raising unit 33 to the sprayer is likewise housed in an unwinder 73.
  • the flow meter 83 is placed near the sprayer and downstream of the coating product change block, which guarantees the accuracy of the information it provides.
  • a ground wire 114 allows the grounding of the coating product change block 23 and the return of the supply current to the high voltage unit 33. It is common to the three sprayers.
  • the cylinder 93 is housed in the conduit 106; it is supplied with air by some of the pipes 113 which are also housed in the conduit 106.
  • the coating product change block 23 and the tension raising unit 33 are carried by the upper face of the hollow beam 5; they are located under the cover part 121 which is the only part to be removed or tilted for maintenance operations; the coating product change block 23 and the tension raising unit 33 are therefore particularly easy to access.
  • the lower duct 106 supporting the sprayers 11 to 13 is not traversed or contains only air pipes 113 or structural elements 93 actuated by air.
  • the only elements at high voltage, namely electrical cables such as cable 63, are located in the insulating unwinders.
  • FIG. 4 When water-soluble paints are used, the embodiment of Figure 4 can be used. Components which are identical to those of the Figure 1 embodiment bear unchanged references.
  • An electrical and fluidic separator 150 provided with quick connection means and an intermediate tank 151 are interposed between the pipe 43 and the sprayer 13, near the latter in the conduit 106. In the coating phase, the separator is open and the high voltage applied to the sprayer 13 does not run the risk of creeping up to the coating product change block 23. When it is necessary to fill the intermediate reservoir 151, for example during the interval between two objects to be covered, the high voltage is cut and the separator 150 is closed, which allows the transfer of the coating product from the coating product change block to the intermediate tank 151.
  • FIG. 5 Downstream of the coating product change block 23 and of the flow meter 83 is provided a cleaning-filling unit 203.
  • the sprayer 13 is mounted at the end of an insulating support 200 containing a reservoir 201.
  • the support is movable in vertical translation, that is to say perpendicular to the axis, between a low coating position and a high cleaning-filling position of the reservoir 201.
  • the support 200 is integral with a piston 202 movable in a cylinder 204 thanks to two air ducts 205 and 206.
  • the duct 206 opens into a closed upper chamber of the cylinder 204, one wall of which is formed by the piston 202.
  • the duct 205 opens into a lower annular chamber defined between the piston 202 , the cylinder 204, the support 200 and a tight sliding joint 208 interposed between cylinder and support.
  • the assembly of the cylinder 204 and of the objects it contains is movable under the action of a pneumatic cylinder 93 parallel to the axis 7 to allow the sweeping movements of the sprayer 13.
  • An elbow fitting 209 is installed at the top of the cylinder 204.
  • First quick connection means 210 are provided between the cleaning-filling unit 203 and the connector 209. They are actuated by the jack 93.
  • Second quick connection means 212 are provided between the connector 209 and the inlet of the reservoir 201 secured to the piston 202.
  • the cable 63 is connected to the sprayer 13.
  • the operation is as follows.
  • the support In the spraying phase, the support is in the low position; the high voltage can be applied to the sprayer 13 by the cable 63 without danger of returning to earth or to the coating product change block because the distance between the piston 202 and the cleaning-filling unit 203 is sufficient to allow electrical insulation.
  • the high-voltage supply is cut off, the cylinder 204 is moved parallel to the axis 7 by the jack 93 to operate the closing of the connection means 210 and the connection to the cleaning-filling unit 203.
  • the piston 202 is raised to operate the closing of the connection means 212.
  • the unit 203, the tank 201 and the sprayer 13 are thus placed in communication for cleaning and filling operations known to those skilled in the art.
  • This configuration is particularly advantageous because it also makes it possible to position at three different heights the three sprayers 11 to 13 carried by the hollow beam 5.
  • the above description relates to a liquid coating product installation, but the invention is applicable to a powder coating product.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP94400699A 1993-04-01 1994-03-31 Elektrostatische Farbspritzanlage Expired - Lifetime EP0618014B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9303828 1993-04-01
FR9303828A FR2703265B1 (fr) 1993-04-01 1993-04-01 Machine de projection de produit de revetement par voie electrostatique.

Publications (3)

Publication Number Publication Date
EP0618014A1 true EP0618014A1 (de) 1994-10-05
EP0618014B1 EP0618014B1 (de) 1997-05-14
EP0618014B2 EP0618014B2 (de) 2010-06-16

Family

ID=9445630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400699A Expired - Lifetime EP0618014B2 (de) 1993-04-01 1994-03-31 Elektrostatische Farbspritzanlage

Country Status (5)

Country Link
US (1) US5500045A (de)
EP (1) EP0618014B2 (de)
DE (1) DE69403130T2 (de)
ES (1) ES2104299T5 (de)
FR (1) FR2703265B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731921B1 (fr) * 1995-03-20 1997-04-30 Sames Sa Dispositif de projection electrostatique de produit de revetement
GB2329600B (en) * 1996-05-29 2000-01-12 Honda Motor Co Ltd Method of forming protective film of coating surface of automobiles
DE102004040162B4 (de) * 2004-08-19 2013-10-24 Eisenmann Ag Vorrichtung zum Beschichten von Gegenständen
DE102009012140A1 (de) 2009-03-06 2010-09-09 Dürr Systems GmbH Roboteranordnung, insbesondere in einer Lackierkabine
CN103240204B (zh) * 2013-05-16 2015-06-17 济南开元新型建筑材料有限公司 一种加气混凝土砌块脱模油自动喷涂装置及其方法
DE102018127827A1 (de) * 2018-11-07 2020-05-07 Jakob Handte Werkzeugmaschine mit strömungsbeeinflussendem Anbau

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178746A1 (de) * 1984-10-17 1986-04-23 Ransburg Corporation Verteilungssystem für Beschichtungsmaterial
EP0480663A2 (de) * 1990-10-09 1992-04-15 Nordson Corporation Verbesserungen beim Montieren und Bewegen von Beschichtungsmaterialverteilern
DE4107094A1 (de) * 1991-03-06 1992-09-10 Ransburg Gmbh Vorrichtung zum automatischen spruehbeschichten von gegenstaenden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245371A (ja) * 1985-08-24 1987-02-27 Toyota Motor Corp 車両ボデ−外板の塗装方法およびその装置
EP0476561A3 (en) * 1990-09-20 1992-05-13 Erich Meyer Painting installation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178746A1 (de) * 1984-10-17 1986-04-23 Ransburg Corporation Verteilungssystem für Beschichtungsmaterial
EP0480663A2 (de) * 1990-10-09 1992-04-15 Nordson Corporation Verbesserungen beim Montieren und Bewegen von Beschichtungsmaterialverteilern
DE4107094A1 (de) * 1991-03-06 1992-09-10 Ransburg Gmbh Vorrichtung zum automatischen spruehbeschichten von gegenstaenden

Also Published As

Publication number Publication date
EP0618014B2 (de) 2010-06-16
ES2104299T3 (es) 1997-10-01
FR2703265A1 (fr) 1994-10-07
US5500045A (en) 1996-03-19
FR2703265B1 (fr) 1995-06-23
ES2104299T5 (es) 2010-09-10
DE69403130T2 (de) 1998-01-02
DE69403130D1 (de) 1997-06-19
EP0618014B1 (de) 1997-05-14

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