EP0139274B1 - Procédé et appareil pour l'application d'une couche de laque en deux ou plusieurs couleurs - Google Patents

Procédé et appareil pour l'application d'une couche de laque en deux ou plusieurs couleurs Download PDF

Info

Publication number
EP0139274B1
EP0139274B1 EP84112025A EP84112025A EP0139274B1 EP 0139274 B1 EP0139274 B1 EP 0139274B1 EP 84112025 A EP84112025 A EP 84112025A EP 84112025 A EP84112025 A EP 84112025A EP 0139274 B1 EP0139274 B1 EP 0139274B1
Authority
EP
European Patent Office
Prior art keywords
paint
substrate
spray
paints
colours
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
Application number
EP84112025A
Other languages
German (de)
English (en)
Other versions
EP0139274A1 (fr
Inventor
Roland Dipl.-Ing. Meisner
Hans Dipl.-Ing. Pollinger
Bernd Dipl.-Ing. Krüger
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.)
Audi AG
BASF Farben und Fasern AG
Original Assignee
Audi AG
BASF Lacke und Farben 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 Audi AG, BASF Lacke und Farben AG filed Critical Audi AG
Priority to AT84112025T priority Critical patent/ATE28413T1/de
Publication of EP0139274A1 publication Critical patent/EP0139274A1/fr
Application granted granted Critical
Publication of EP0139274B1 publication Critical patent/EP0139274B1/fr
Expired 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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together
    • 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
    • B05B5/0255—Discharge apparatus, e.g. electrostatic spray guns spraying and depositing by electrostatic forces only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects

Definitions

  • the invention relates to a method for producing two-color or multi-color paints according to the preamble of the main claim.
  • the invention relates to an apparatus for performing the method.
  • the procedure is usually that the substrate is coated with a first color, the lacquer applied is dried and baked, and then the surface coated with this color is covered, whereupon then the uncovered areas are covered with a second or further varnish (see textbook for vehicle painters, Verlag Neuer Merkur GmbH, Kunststoff, 1st edition, 1981, page 190).
  • This procedure is time-consuming and energy-consuming because of the drying or stoving required between the application of two lacquers.
  • the invention has for its object to provide a method and a device for a multi-colored coating, wherein all differently colored surfaces are relatively sharply delimited from each other and thus meet the requirements of a decorative surface without intermediate drying or baking is required and wherein Furthermore, the area of coverage between the individual color tone limits can be kept low.
  • the substrate is coated with the first lacquer or color in a manner known per se, for example by spray applications, using pneumatic atomizers or centrifugal atomizers in the electrostatic field.
  • the usually differently colored second or any further, generally differently colored lacquer is applied by an atomizer, which works with electrostatic transport of the color particles and which imparts an impulse to the lacquer droplets at the color tone boundaries, which is almost parallel to the surface normal of the substrate present there.
  • an electrostatically operating device is proposed as the atomizer, which works with stationary atomizer edges and a transport of the paint particles in the electric field.
  • Claim 2 identifies a variant of the method according to the invention, in which the spray pattern can be controlled.
  • Claim 3 describes a development in which the spray pattern can even be changed during the spraying process itself.
  • the spray gap is oriented such that it is essentially perpendicular to the plane which is spanned by the surface normal in the area of the color tone limits and by the direction of movement of the substrate.
  • This unusual arrangement of the spraying device ensures that an impulse is electrostatically impressed on the paint droplets at the color boundaries, which is then parallel to the surface normals present there, thereby achieving the sharp delimitation of the applied paint in the area of the color tone limit.
  • a further advantageous embodiment of the device according to the invention consists in providing auxiliary electrodes which are adjustable, preferably automatically adjustable, in the direction of the longitudinal axis of the spray gap in front of the spray gap and which limit the effective length of the spray gap.
  • a particular field of application of the invention results in the two-color painting of car bodies, in which, according to the invention, both colors can be applied wet on wet.
  • the narrow border area between the different colored areas that can be achieved by the method according to the invention can be covered by components, such as a ram protection strip. This eliminates the need for the previous intermediate step of baking the first coat of paint before applying the second color. Reduced cycle times and reduced energy consumption per painting a body are the advantages. The space requirement is also reduced.
  • Fig. 1 denotes a spray element which is connected to high voltage and thus enables electrostatic atomization of the liquid paint supplied, namely at stationary atomizer edges which define a spray gap 9 (FIG. 2).
  • a substrate 2 e.g. a car body, lies on earth and is coated with a first lacquer layer 3.
  • the second lacquer layer to be applied by the spray element 1, which preferably has a different color, is designated by 4.
  • Motor-adjustable auxiliary electrodes 5 can be arranged in front of the spray gap 9, which are adjustable, for example, in the direction of the longitudinal gap axis x - x and thereby limit the effective length of the spray gap 9.
  • the first lacquer layer 3 can be applied by methods which are commonly used today to apply lacquer layers to substrates. A sharp delimitation of the first lacquer layer 3 to the subsequent lacquer layer 4 is not necessary and cannot be achieved with the methods customary today. 1 that the transition region of the first lacquer layer 3 can extend over the surface to be coated with the second lacquer layer 4.
  • Fig. 2 the trajectories of the paint droplets under the influence of air drag forces and gravity G are designated. Smaller and thus lighter paint droplets are guided onto the substrate via the trajectory 7, while heavier, i.e. Larger paint droplets are guided over the trajectory 8 from the spray element 1 to the substrate 2.
  • This dependency of the trajectories on the droplet mass also results in a transition area in the second lacquer layer. However, this is less than 2 cm and thus a sufficiently sharp separation of the two lacquer layers 3 and 4 is achieved. In the transition area, which - as stated above - is only 2 cm in size, corresponding trim strips or the like can be attached.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Road Signs Or Road Markings (AREA)

Claims (8)

1. Procédé pour exécuter des peintures en deux ou plus de deux couleurs, dans lequel une première peinture (3) est déposée sur au moins une partie d'un substrat (2), en particulier sur une partie d'une carrosserie de véhicule automobile et, ensuite, une deuxième peinture et éventuellement une autre peinture (4) de couleur différente est ou sont déposée(s) sur d'autres parties prédéterminées du substrat (2) et les dépôts de peinture sont durcis par cuisson, et dans lequel il existe des zones limites entre la première peinture (3) et la deuxième ou les autres peintures de couleur différente (4), cararactérisé en ce que la deuxième ou éventuellement l'autre peinture (4) d'une couleur différente est ou sont déposée(s) sans cuisson intermédiaire de la première peinture (3), sur les autres parties prédéterminées du substrat (2), avec utilisation d'une pulvérisation électrostatique sur les arêtes immobiles du pulvérisateur, avec transport électrostatique des particules de peinture, et en ce qu'après l'application de la première peinture (3, 4) tous les dépôts de peinture sont durcis ensemble par cuisson.
2. Procédé selon la revendication 1, caractérisé en ce que le comportement d'étalement des particules de peinture éjectées de l'arête de pulvérisateur fixe dans le champ électrostatique est influencé par des électrodes auxiliaires (5).
3. Procédé selon la revendication 2, caractérisé en ce que, pendant l'opération de pulvérisation, le champ électrostatique est modifié par déplacement des électrodes auxiliaires (5).
4. Procédé selon la revendication 1, dans lequel le substrat à peindre est une carrosserie de véhiculé automobile, caractérisé en ce que la région de la transition de peinture entre les différentes teintes de peinture est dissimulée par un élément approprié.
5. Dispositif pour la mise en oeuvre du procède selon l'une des revendications 1 à 4, dans lequel, au moyen d'organes de pulvérisation (1) ou de groupes d'organes de pulvérisation (1) disposés l'un à la suite de l'autre dans la direction du travail, et qui servent à appliquer une peinture sur un substrat (2), une première peinture (3) est appliquée sur au moins une partie du substrat (2) et, ensuite, une deuxième et éventuellement une autre peinture (4) de couleur différente sont déposées sur d'autres parties du substrat (2) et les applications de peinture sont durcies par cuisson, et dans lequel il existe des régions limites entre la première peinture (3) et la deuxième ou les autres peintures de couleur différente, caractérisé en ce qu'au moins le dernier organe de pulvérisation (1) ou le dernier groupe d'organes de pulvérisation présente ou présentent une arête de pulvérisateur immobile pour la pulvérisation électrostatique des particules de peinture, cependant que la fente de projection (9) formée par l'arête de pulvérisateur immobile présente son axe longitudinal de fente (x-x) sensiblement perpendiculairement à la normale (11) à la surface du substrat (2) à peindre.
6. Dispositif selon la revendication 5, caractérisé en ce que la fente de pulvérisation (9) présente son axe longitudinal de fente (x-x) sensiblement perpendiculairement au plan défini par la direction de la normale à la surface présente aux limites des tons de peinture et par la direction du mouvement du substrat qui passe au droit de la fente de projection.
7. Dispositif selon l'une des revendications 5 et 6, caractérisé par des électrodes auxiliaires (5) qui sont disposées entre la fente de pulvérisation (9) et le substrat (2) et sont mobiles en position.
8. Dispositif selon la revendication 7, caractérisé en ce que les électrodes auxiliaires (5) peuvent être déplacées pendant l'opération de pulvérisation.
EP84112025A 1983-10-12 1984-10-08 Procédé et appareil pour l'application d'une couche de laque en deux ou plusieurs couleurs Expired EP0139274B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112025T ATE28413T1 (de) 1983-10-12 1984-10-08 Verfahren und vorrichtung zur herstellung einer zwei- oder mehrfarbigen lackierung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3337028 1983-10-12
DE3337028 1983-10-12
DE3435937 1984-09-29
DE3435937A DE3435937C2 (de) 1983-10-12 1984-09-29 Verfahren und Vorrichtung zur Herstellung einer zwei- oder mehrfarbigen Lackierung sowie ihre Anwendung

Publications (2)

Publication Number Publication Date
EP0139274A1 EP0139274A1 (fr) 1985-05-02
EP0139274B1 true EP0139274B1 (fr) 1987-07-22

Family

ID=25814778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112025A Expired EP0139274B1 (fr) 1983-10-12 1984-10-08 Procédé et appareil pour l'application d'une couche de laque en deux ou plusieurs couleurs

Country Status (6)

Country Link
US (1) US4740384A (fr)
EP (1) EP0139274B1 (fr)
AT (1) ATE28413T1 (fr)
DE (2) DE3435937C2 (fr)
ES (1) ES536732A0 (fr)
WO (1) WO1985001678A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5250383A (en) * 1990-02-23 1993-10-05 Fuji Photo Film Co., Ltd. Process for forming multilayer coating
DE4213699C1 (en) * 1992-04-25 1993-09-02 Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De Component with multicoloured surface - has two different coloured areas sepd. by flange projecting from component surface and which is later removed
US5976634A (en) * 1996-02-23 1999-11-02 Batesville Casket Company, Inc. Gold plating process for plastic substrates
US5683756A (en) * 1996-02-23 1997-11-04 Batesville Casket Company, Inc. Gold plating process for zinc substrates
RU2244599C2 (ru) * 1998-11-27 2005-01-20 Металлферэдлунг Гмбх Унд Ко. Кг Покрытие из синтетической пленки, а также способ и устройство для его изготовления
DE10028705B4 (de) * 2000-06-09 2004-04-08 Audi Ag Verfahren zur Herstellung eines mit mindestens zwei unterschiedlichen Lacken beschichteten Karosserieelementes eines Kraftfahrzeugs
US6376016B1 (en) * 2000-06-14 2002-04-23 Ford Global Tech., Inc. Method for painting a vehicle with at least two colors
WO2002000357A1 (fr) * 2000-06-26 2002-01-03 Abb K.K. Procede d'application d'un revetement bicolore
US6532617B2 (en) 2001-04-26 2003-03-18 Plaid Enterprises, Inc. Device for loading and maintaining two separate colors of paint on a paintbrush and method of using same
US7592040B2 (en) * 2005-02-23 2009-09-22 Ppg Industries Ohio, Inc. Two-tone color effect coating process
DE102011013307A1 (de) * 2011-03-07 2012-09-13 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Vorrichtung und Verfahren zum Applizieren von Lacken
DE102013002433A1 (de) 2013-02-11 2014-08-14 Dürr Systems GmbH Lackierverfahren und Lackieranlage für Zierstreifen
DE102019206058B3 (de) 2019-04-29 2020-04-23 Audi Ag Verfahren zur Erzeugung einer mehrfarbigen Effektlackierung

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DE723496C (de) * 1940-03-15 1942-08-06 Kali Chemie Ag Herstellung von Alkalialuminat aus Tonerdesulfat und Alkalichlorid
US2780565A (en) * 1953-07-17 1957-02-05 Ransburg Electro Coating Corp Electrostatic spray coating system and method
US3054697A (en) * 1960-02-29 1962-09-18 Ford Motor Co Electrostatic painting
FR1360336A (fr) * 1963-03-28 1964-05-08 Sames Mach Electrostat Procédé de revêtement de surfaces
US3596275A (en) * 1964-03-25 1971-07-27 Richard G Sweet Fluid droplet recorder
US3413917A (en) * 1966-11-16 1968-12-03 Purex Corp Ltd Electrostatic printing with means to change polarity of counter electrode
US3486483A (en) * 1968-08-23 1969-12-30 Richard Tilney Electrostatic spray coating apparatus
GB1284755A (en) * 1968-09-30 1972-08-09 Celanese Coatings Co Process for coating surfaces and compositions for use therein
US3714928A (en) * 1970-11-17 1973-02-06 Mead Corp Multiple jet channel
DE2213862A1 (de) * 1972-03-22 1973-10-11 Metallgesellschaft Ag Verfahren zum korrosionsschutz von metallgegenstaenden
GB1558464A (en) * 1975-07-29 1980-01-03 Metal Box Co Ltd Method and apparatus for providing flame cured coatings
SE7709590L (sv) * 1976-09-08 1978-03-09 Bolan Ramdass Amar Sett att anbringa fergskikt pa en kroppsyta
JPS59272B2 (ja) * 1976-11-24 1984-01-06 上「むろ」 隆道 吹付け塗装方法
US4551491A (en) * 1983-07-29 1985-11-05 Inmont Corporation Pearlescent automotive paint compositions

Also Published As

Publication number Publication date
ES8603768A1 (es) 1986-01-01
DE3435937A1 (de) 1985-05-02
DE3464858D1 (en) 1987-08-27
WO1985001678A1 (fr) 1985-04-25
US4740384A (en) 1988-04-26
ATE28413T1 (de) 1987-08-15
ES536732A0 (es) 1986-01-01
EP0139274A1 (fr) 1985-05-02
DE3435937C2 (de) 1986-01-02

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