EP0858840A1 - Dispositif et procédé pour le revêtement électrostatique en poudre d'articles - Google Patents

Dispositif et procédé pour le revêtement électrostatique en poudre d'articles Download PDF

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Publication number
EP0858840A1
EP0858840A1 EP97121869A EP97121869A EP0858840A1 EP 0858840 A1 EP0858840 A1 EP 0858840A1 EP 97121869 A EP97121869 A EP 97121869A EP 97121869 A EP97121869 A EP 97121869A EP 0858840 A1 EP0858840 A1 EP 0858840A1
Authority
EP
European Patent Office
Prior art keywords
powder
spray gun
channel plate
feed
unit
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Withdrawn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
EP97121869A
Other languages
German (de)
English (en)
Inventor
Horst Dr. Adams
Maximilian Matt
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.)
Wagner International AG
Original Assignee
Wagner International 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 Wagner International AG filed Critical Wagner International AG
Publication of EP0858840A1 publication Critical patent/EP0858840A1/fr
Withdrawn legal-status Critical Current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
    • B05B7/14—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
    • B05B7/1477—Arrangements for supplying particulate material means for supplying to several spray apparatus
    • 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
    • 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
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials

Definitions

  • the invention relates to a device and a method for electrostatic powder coating of workpieces with different powders using a spray device at least one spray gun according to the preambles of the claims 1 and 5.
  • the workpieces slowly on several spray guns arranged one after the other continuously moving past.
  • the spray guns are on Hoists mounted so that they are vertical with respect to the moving workpieces can be moved up and down. Sprayed Excess powder is recovered and either with Fresh powder mixed or sprayed separately. At least the spray gun first reached by the workpieces is wholly or partly fed with the recycled powder, while the last one reached from the workpieces Spray gun is supplied with fresh powder only. So is the workpiece with a primer coat made entirely or partially recycled powder, the lower quality than the last applied top layer from the fresh powder has (DE 40 13 063 C1).
  • a color change currently requires either a careful change Cleaning of the entire supply system for the powder supply or an exchange of the old hose set for a new hose set on all guns for powder mixtures or to avoid color spreading.
  • a manual hose replacement leads to a conventional one Cleaning to a significant reduction in Downtime when changing colors, but it always takes a lot of work considerable expenditure of equipment, time and labor.
  • the invention aims at a device and a method for electrostatic powder coating of workpieces with different powders, be it for coating a workpiece with several powder layers different quality, e.g. a primer coat and one or more cover layers above one another, or be it for coating the workpieces with different ones Powder qualities in different places or with different ones Colors, the period for switching from one powder should be shortened to another powder.
  • a device and a method for electrostatic powder coating of workpieces with different powders be it for coating a workpiece with several powder layers different quality, e.g. a primer coat and one or more cover layers above one another, or be it for coating the workpieces with different ones Powder qualities in different places or with different ones Colors, the period for switching from one powder should be shortened to another powder.
  • the device and the method according to the invention it is possible to supply the powder to the spray gun from a Powder to another powder in a period of seconds or a split second, switching to cleaning during the powder change, i.e. when the powder is interrupted Powder feed is completely dispensed with. This cuts an inevitable Interruption of operation when changing powder significantly from.
  • This makes it possible instead of using multiple Spray guns with just one spray gun in no time different powders on one at the spray gun continuously to move past the workpiece, the Gun on an articulated arm robot known from wet painting technology is mountable, the precise positioning the spray gun along a pre-programmed path of the workpiece.
  • Such a pinpoint Positioning the spray gun causes almost that all sprayed powder gets on the workpiece surface, so that, for example, when spraying powder in succession different colors a disposal of the little sprayed by Powders are accepted and therefore without Powder recycling can be worked.
  • the structural unit of a powder feed device shown in the figures 1 of a spray gun, not shown, has one Feed unit 2 with hose connections arranged in a circle 3, 4, 5, 6, with through holes 3 ', 4', 5 ', 6' communicate in the feed unit, and a discharge unit 8 with a powder outlet 9, the one Hose connector 10 carries, which with a bore 10 'in Powder outlet 9 of the discharge unit 8 communicates.
  • the hole 10 'in turn communicates with four oblique holes 3 '', 4 '', 5 '' and 6 '' that face the feed unit, flat surface 11 in the same configuration as that Through holes 3 'to 6' open flush with these.
  • a channel plate is located between the feed unit 2 and the discharge unit 8 12 arranged which has a single through hole 30 has.
  • This through hole 30 is on the same Arranged in a circle like the holes 3 'to 6' and the oblique holes 3 '' to 6 ''.
  • the channel plate is around its central axis rotatable, which coincides with the central axis of the circle, on which the through holes 3 'to 6' and the Oblique bores are 3 '' to 6 '', so that by turning the Channel plate in positions in which the through hole 30 of the channel plate 12 with pairs associated with each other Holes 3 'and 3' ', 4' and 4 '', 5 'and 5' 'or 6' and 6 ''' align, optionally the hose connection 10 of the discharge unit 8 with one of the hose connections 3 to 6 of the feed unit 2 is connectable.
  • Fig. 2 shows the device of FIG. 1 supplemented by a Drive with a drive motor 20, which is an output pinion 21 drives.
  • the channel plate 12 is on its outer Scope with the same toothing as the output pinion 21 Mistake.
  • the output torque is via a toothed belt 22 of the motor 20 can be transferred to the channel plate 12.
  • the turning paths of the motor 20 and thus that of the channel plate 12 by means of a control device, not shown, exactly like this measurable that the channel plate each predetermined rotation travels on for the precise alignment of the bore 30 the selected hole 3 ', 4', 5 'or 6' required are.
  • switching times can be of the order of magnitude Get second and less.
  • the channel plate 12 must be between the opposite Surfaces 11, 13 of the discharge unit 8 and the feed unit 2 seal around the bore 30 in particular on both sides. This can be easily mastered with common sealing technology, which is not the subject of the invention and therefore is not described here.
  • the driving power of the motor 20 can also be transferred to the channel plate 12 in another way can, e.g. by means of a toothed gear. It just has to be sure that the drive the channel plate 12 around a precisely dimensioned way to align each selected bores of the feed unit 2 and the discharge unit 8 adjusted with the bore 30.
  • spray guns of common design can also be used air-assisted or airless spraying of powder the invention are used. So much for a powder-air mixture is to be sprayed is in the description above Read “powder” as a “powder-air mixture”.
  • FIG 3 shows a conveyor line of a motor vehicle body 50 in top view.
  • An automobile body 50 is on a continuously in the direction of arrow 51 and platform 52 slowly moved in the conveyor line.
  • An articulated arm robot 53 is arranged on each side of the platform, which are known from wet painting technology.
  • the stationary at 54 anchored articulated arm robots 53 have one Working arm 55, at its free end at 56 a powder feeder is arranged.
  • This powder feeder 56 basically corresponds to that in FIGS. 1 and 2 shown powder feed device 1, but supplies here two arranged parallel to each other in a twin arrangement Spray guns 57, 58 with different powders depending on Switch position of the powder feeder.
  • the twin arrangements can be made using the articulated arm robot the spray guns 57, 58 on pre-programmed tracks bring it so close to the vehicle body 50, that desired places are coated with the appropriate powder be, e.g. B. the areas not visible from the outside the vehicle body with recycled primer powder and visible surfaces of the body after a quick switch the spray guns 7, 8 with fresh powder.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
EP97121869A 1997-02-12 1997-12-11 Dispositif et procédé pour le revêtement électrostatique en poudre d'articles Withdrawn EP0858840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19705381A DE19705381C2 (de) 1997-02-12 1997-02-12 Einrichtung und Verfahren zum elektrostatischen Pulverbeschichten von Werkstücken
DE19705381 1997-02-12

Publications (1)

Publication Number Publication Date
EP0858840A1 true EP0858840A1 (fr) 1998-08-19

Family

ID=7820045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121869A Withdrawn EP0858840A1 (fr) 1997-02-12 1997-12-11 Dispositif et procédé pour le revêtement électrostatique en poudre d'articles

Country Status (2)

Country Link
EP (1) EP0858840A1 (fr)
DE (1) DE19705381C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1773507B1 (fr) 2004-06-03 2012-08-15 Nordson Corporation Changement de couleur pour un systeme d'application de revetement en poudre
DE102006005341A1 (de) * 2006-02-07 2007-08-09 Volkswagen Ag Lackiervorrichtung sowie Farbwechseleinrichtung für eine Lackiervorrichtung
DE102015110312B4 (de) * 2015-06-26 2019-08-01 Gema Switzerland Gmbh Pulverweiche und Pulverabgabesystem mit Pulverweiche

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782632A (en) * 1971-08-02 1974-01-01 Gema Ag Powder spray gun for spraying different color powders from a powder channel of a spray gun
US4508271A (en) * 1982-05-03 1985-04-02 Gress Ronald A Airbrush assembly
EP0450877A2 (fr) * 1990-03-30 1991-10-09 Nordson Corporation Atomiseur rotatif avec dispositif de changement de couleur et régulateur de pression de fluide intégrés
DE4013063C1 (fr) * 1990-04-24 1992-01-02 Metri Airfluid Ag, Altstaetten, Ch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930121C2 (de) * 1979-07-25 1982-05-27 Gema AG Apparatebau, 9015 St. Gallen Verfahren und Einrichtung zum Sprühbeschichten von Gegenständen mit Pulver
FR2677900B1 (fr) * 1991-06-24 1993-10-08 Sames Sa Installation de projection electrostatique de produit de revetement en poudre.
US5320283A (en) * 1993-01-28 1994-06-14 Nordson Corporation Robot mounted twin headed adjustable powder coating system with spray pattern direction control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782632A (en) * 1971-08-02 1974-01-01 Gema Ag Powder spray gun for spraying different color powders from a powder channel of a spray gun
US4508271A (en) * 1982-05-03 1985-04-02 Gress Ronald A Airbrush assembly
EP0450877A2 (fr) * 1990-03-30 1991-10-09 Nordson Corporation Atomiseur rotatif avec dispositif de changement de couleur et régulateur de pression de fluide intégrés
DE4013063C1 (fr) * 1990-04-24 1992-01-02 Metri Airfluid Ag, Altstaetten, Ch

Also Published As

Publication number Publication date
DE19705381A1 (de) 1998-08-20
DE19705381C2 (de) 1999-06-17

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