EP1769852A1 - Méthode et dispositif de revêtement - Google Patents

Méthode et dispositif de revêtement Download PDF

Info

Publication number
EP1769852A1
EP1769852A1 EP05109036A EP05109036A EP1769852A1 EP 1769852 A1 EP1769852 A1 EP 1769852A1 EP 05109036 A EP05109036 A EP 05109036A EP 05109036 A EP05109036 A EP 05109036A EP 1769852 A1 EP1769852 A1 EP 1769852A1
Authority
EP
European Patent Office
Prior art keywords
coating
layer
coating agent
collected
application
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Withdrawn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
EP05109036A
Other languages
German (de)
English (en)
Inventor
Hans-Georg Fritz
Thomas Dürr
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.)
Duerr Systems AG
Original Assignee
Duerr Systems 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 Duerr Systems AG filed Critical Duerr Systems AG
Priority to EP05109036A priority Critical patent/EP1769852A1/fr
Publication of EP1769852A1 publication Critical patent/EP1769852A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/10—Arrangements for collecting, re-using or eliminating excess spraying material the excess material being particulate
    • 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
    • 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 method and a corresponding coating system for applying a primer layer to a workpiece according to claims 1 and 18 and to a lacquer layer produced therewith according to claim 27.
  • Modern paints for painting automotive body parts usually consist of several superimposed paint layers, namely an exterior, scratch-resistant clearcoat, followed by a color and effect basecoat, an underlying filler to protect against chipping and to compensate for unevenness, a lower-lying Primer and finally a directly applied to the vehicle body panel to be coated phosphate coating, which passivated the metal surface of the coated motor vehicle body part, improved by their rough microstructure adhesion and forms a corrosion protection together with the primer.
  • the coating agent mixture previously collected in the two coating zones is applied in the first of the two coating zones as a lower surfacer coat.
  • the remainder of the surfacer coat of fresh coating powder of the desired hue is then formed in the next painting zone.
  • This covering of the lower filler layer consisting of the collected coating agent mixture with an outer filler layer of fresh coating powder is expedient, since the collected coating agent mixture does not have the desired color shade and would otherwise interfere with subsequent mechanical damage (for example by falling rocks) of the overlying basecoat.
  • a disadvantage of this multi-step and coating zone cross-coating process is the extra work for the additional (n) spray booth (s) and the additional application technology and material supply. This additional expenditure arises, for example, in that adjacent painting zones must be connected to one another in order to be able to jointly collect and mix the coating agent residues in the adjacent painting zones.
  • the layer thickness of the outer surfacer layer consisting of the fresh coating powder must be at least 60-70% of the total layer thickness of the surfacer layer in the case of a poor covering power of the coating powder used as surfacer (eg in bright shades) avoid the above-mentioned disturbing show through of the underlying coating agent mixture.
  • the existing of the coating agent residues lower filler layer is then correspondingly thin, so that not all excess coating agent residues can be recycled at a low application efficiency and thus a part of the coating agent residues must be disposed of.
  • the invention is therefore based on the object to reduce the expenditure on equipment in the known coating method described above and in a corresponding coating system, wherein, if possible, all accumulating coating residues should be further processed.
  • This object is achieved by a coating method according to claim 1, a coating system according to claim 18 and a paint layer according to claim 27.
  • the invention encompasses the general technical teaching of applying a single-layer surfacer coat of coating agent residues instead of a two-layer surfacer coat, wherein the above-mentioned disruptive show through of the differently colored coating agent residues can be avoided by mixing fresh coating powder of the desired color with the collected coating agent residues prior to application of the surfacer coat.
  • the surfacer layer is preferably formed over its entire layer thickness from previously collected, excess coating agent residues ("overspray").
  • this offers the advantage that the filler layer can be applied with the available application devices in a single coating application with a conventional layer thickness of 50-70 ⁇ m.
  • the coating method according to the invention it is preferable to collect differently colored coating agent residues and to mix them together to form a coating agent mixture, which is then applied as a filler.
  • the different colored coating agent residues can be collected on an application device before or after a color change.
  • the differently colored coating agent residues are collected on different application devices, which each apply coating compositions with different shades.
  • the coating method according to the invention is preferably used in powder coating.
  • the invention is not limited to the use of powder as a coating agent, but in principle also be realized with liquid coating compositions.
  • the applied surfacer layer is sintered or fused, which is not absolutely necessary. This can be useful if the filler layer remains visible later, such as in the engine or trunk of a motor vehicle or in so-called “basecoats”.
  • the coating of the workpieces according to the coating method according to the invention is preferably carried out with a predetermined cycle time, wherein a color change can be performed in the cycle time.
  • the invention also includes a coating system for carrying out the coating method according to the invention described above.
  • the coating system according to the invention has at least one recovery device in order to absorb excess coating agent residues during an application process in a coating zone, which are also referred to as overspray.
  • the collected coating agent residues are thereby fed to an application device which applies the collected coating agent residues as a filler coat onto a workpiece.
  • a coating zone-internal supply of the application device is provided by the recovery device.
  • the application device is thus connected to the coating system according to the invention only with the recovery device of the same coating zone.
  • the coating system according to the invention advantageously makes it possible to carry out the one-step coating method according to the invention, in which the surfacer layer consists of the collected coating agent residues over its entire layer thickness.
  • the surfacer layer consists of the collected coating agent residues over its entire layer thickness.
  • a plurality of application devices and / or a plurality of recovery devices may be arranged in a coating zone, wherein the application devices and the recovery devices are connected to each other only within the same coating zone.
  • the application device is preferably connected both to the recovery device of the same coating zone and to a coating agent supply for supplying a fresh coating agent.
  • This advantageously offers the possibility of admixing the collected coating agent residues with fresh coating powder in order to adapt the hue of the applied surfacer coat to the hue of the overlying paint coat and thus to avoid a disruptive show through of the surfacer coat.
  • the coating system according to the invention preferably has a mixing device on the input side with the recovery device and the coating agent supply is connected, while the mixing device is connected on the output side to the application device.
  • this mixing device has an adjustable mixing ratio between the collected coating agent residues and the fresh coating agent in order to be able to adapt the color tone of the filler layer.
  • the recovery device in the coating system according to the invention is preferably connected to a storage container, in which the collected coating agent residues can be collected.
  • the collected overspray will be processed in a process intermediate step, which may occur within the coating equipment (i.e., on-site) or paint manufacturer.
  • the aim of working up the collected coating agent residues is usually to achieve specifically defined properties of the coating agent residues, such as a certain fluidizability, a predetermined color shade and / or a defined particle size distribution or grain size.
  • the collected and optionally worked-up coating agent residues are applied only to specific surfaces of the workpiece to be coated.
  • the collected and optionally reconditioned coating agent residues are applied specifically to the door entry, the sill, the rear and / or the underbody.
  • the collected coating agent residues are therefore examined and discarded or further used depending on the result of the examination.
  • the discarding of the collected coating agent residues may also be useful regardless of their properties, if too much overspray is obtained, which is possible, for example, at a low application efficiency.
  • the invention is furthermore not limited to the coating method according to the invention described above and the coating system according to the invention described above, but also comprises a lacquer layer with a filler layer, which was produced by the coating method according to the invention.
  • the lacquer layer according to the invention is characterized in that the filler layer substantially over its entire Layer thickness coating residues containing previously collected.
  • the known filler layer described at the beginning contains coating agent residues only in the lower layer, while the upper layer of the filler layer consists of fresh coating agent.
  • the lacquer layer according to the invention therefore preferably has a single-layer filler layer.
  • the coating agent residues of the surfacer layer preferably consist of differently colored coating agents which were previously collected and mixed together. In this way, a so-called melange effect is created in the filler layer.
  • the surfacer layer may also contain, in addition to the collected coating agent residues, fresh coating agent admixed with the coating agent residues in order to adapt the color shade of the filler layer to the color shade of the overlying color layer and thereby avoid disruptive show through.
  • the proportion of the blended fresh coating agent may in this case be between 5% and 50%, as already mentioned above.
  • the filler layer in this case preferably has a layer thickness in the range between 50 ⁇ m and 70 ⁇ m, wherein any intermediate values or even smaller values are possible.
  • the invention also includes a workpiece with the lacquer layer according to the invention, such as a motor vehicle body part.
  • a plurality of reservoir 1-6 are arranged, wherein the reservoir 1-5 contain fresh coating powder with different shades, while the reservoir 6 receives excess coating agent residues, which are collected in the application processes as so-called overspray.
  • yellow coating powder is present in reservoir 1, white coating powder in reservoir 2, blue coating powder in reservoir 3, green coating powder in reservoir 4, and red coating powder in reservoir 5, but reservoirs 1-5 can also be different colored coating powder contain.
  • the reservoirs 1-6 are connected to a conventional color changer 7, which select the desired color can.
  • the color changer 7 also allows a mixture of several coating powder from the reservoirs 1-6, as will be described in detail later.
  • the color changer 7 is connected on the output side to a paint valve 8, which is connected via a paint line 9 with a plurality of painting robots 10-13, the painting robots 10-13 having an application efficiency of more than 70%.
  • the painting robots 10-13 apply the coating powder removed from the desired storage container 1-6 in a conventional manner to a workpiece to be coated, which is not shown for the sake of simplicity.
  • the recovery devices 14-18 are connected via a common line 19 to the reservoir 6, which is shown only schematically in the drawing.
  • the reservoir 6 is thus filled with a mixture of different colored coating agent residues, which are collected by the individual recovery devices 14-18.
  • the coating system is controlled so that after the previous application of a phosphate layer and a conventional primer first a filler layer is applied to the workpiece to be coated.
  • a filler layer is applied to the workpiece to be coated.
  • the reservoir 6, the previously collected, different colored coating agent mixture is removed and applied as a filler layer, wherein the filler layer is applied in a painting job.
  • the applied filler layer therefore contains over its entire layer thickness of 50 microns to 70 microns different colored coating agent residues.
  • the color shade of the filler coat can be specifically influenced by the color changer 7 additionally adding fresh coating powder from one of the storage containers 1-5 to the coating agent residues removed from the storage container 6.
  • This color influence of the surfacer layer can also prevent the surfacer layer from appearing visually conspicuous in the event of subsequent damage to the overlying ink layer.
  • the addition and admixture of fresh coating powder into the surfacer layer may also be expedient if there are not enough trapped coating agent residues ("overspray”) available, which is possible, for example, with a very high degree of application efficiency.
  • overspray trapped coating agent residues
  • FIG. 2 shows a multicoat system according to the invention applied to a motor vehicle body part 19.
  • a phosphate layer 20 is applied, which has a layer thickness of about 2 microns.
  • the phosphate layer 20 passivates the metal surface of the motor vehicle body part 19, improves the adhesion of the following paint layers due to its rough microstructure and contributes to corrosion protection.
  • a primer layer 21 Adjoining the phosphate layer 20 on the outside is a primer layer 21 which has a layer thickness of 10-30 ⁇ m.
  • the primer layer 21 also contributes to corrosion protection at and is usually applied as a cathode dip (KTL).
  • a filler layer 22 is applied with a layer thickness of 30-70 microns, which compensates for unevenness in the primer layer 21 and protects the multi-layer coating from stone chipping.
  • a color and effect basecoat layer 23 with a layer thickness of 10-30 microns, which may consist of powder coating or wet or liquid paint.
  • the multicoat system finally has a clearcoat 24, which protects the multicoat system against environmental influences and ensures a smooth and glossy surface.
  • a special feature here is that over its entire layer thickness the surfacer layer 22 consists of differently colored and mixed-together coating agent residues ("overspray”), which were collected during an application process and recycled, thereby advantageously allowing one-step application of the surfacer layer 22.
  • overspray coating agent residues
EP05109036A 2005-09-29 2005-09-29 Méthode et dispositif de revêtement Withdrawn EP1769852A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05109036A EP1769852A1 (fr) 2005-09-29 2005-09-29 Méthode et dispositif de revêtement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05109036A EP1769852A1 (fr) 2005-09-29 2005-09-29 Méthode et dispositif de revêtement

Publications (1)

Publication Number Publication Date
EP1769852A1 true EP1769852A1 (fr) 2007-04-04

Family

ID=35474654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05109036A Withdrawn EP1769852A1 (fr) 2005-09-29 2005-09-29 Méthode et dispositif de revêtement

Country Status (1)

Country Link
EP (1) EP1769852A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102458683A (zh) * 2009-05-12 2012-05-16 3M创新有限公司 用于产生精确油漆线的掩蔽制品和提高掩蔽制品的油漆线性能的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1220265A (en) * 1967-04-28 1971-01-27 Gyromat Corp Recirculating system for flowable spray media
JPS57107261A (en) * 1980-12-25 1982-07-03 Nordson Kk Recovering and reusing circuit for paint
DE4338450A1 (de) * 1993-11-11 1995-05-18 Eisenmann Kg Maschbau Auffangvorrichtung für Overspray in Spritzkabinen
WO2000072976A1 (fr) * 1999-05-27 2000-12-07 Rpm Sud S.P.A. Installation ecologique de peinture et/ou de lavage de supports en polyurethanne
EP1413361A2 (fr) * 2002-10-23 2004-04-28 Water Gremlin Company Système et procédé pour récupérer et réutiliser un solvant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1220265A (en) * 1967-04-28 1971-01-27 Gyromat Corp Recirculating system for flowable spray media
JPS57107261A (en) * 1980-12-25 1982-07-03 Nordson Kk Recovering and reusing circuit for paint
DE4338450A1 (de) * 1993-11-11 1995-05-18 Eisenmann Kg Maschbau Auffangvorrichtung für Overspray in Spritzkabinen
WO2000072976A1 (fr) * 1999-05-27 2000-12-07 Rpm Sud S.P.A. Installation ecologique de peinture et/ou de lavage de supports en polyurethanne
EP1413361A2 (fr) * 2002-10-23 2004-04-28 Water Gremlin Company Système et procédé pour récupérer et réutiliser un solvant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 197 (C - 128) 6 October 1982 (1982-10-06) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102458683A (zh) * 2009-05-12 2012-05-16 3M创新有限公司 用于产生精确油漆线的掩蔽制品和提高掩蔽制品的油漆线性能的方法
US8833295B2 (en) 2009-05-12 2014-09-16 3M Innovative Properties Company Masking article for producing precise paint lines and method of improving paint line performance of masking articles
CN102458683B (zh) * 2009-05-12 2015-04-01 3M创新有限公司 用于产生精确油漆线的掩蔽制品和提高掩蔽制品的油漆线性能的方法

Similar Documents

Publication Publication Date Title
EP3554719B1 (fr) Installation de revêtement et méthode de revêtement associée
EP2337688B1 (fr) Dispositif de revêtement, et procédé de revêtement correspondant
DE102004010389B4 (de) Verfahren zum Naßlackieren von Fahrzeugkarosserien, zweifarbig lackierte Fahrzeugkarosserie und Zweifarben-Lackieranlage
EP0842710B1 (fr) Procédé pour réparer de petits défauts dans les couches de peintures
EP2953733B1 (fr) Procédé de peinture
EP1733799A1 (fr) Robot équipé de plusieurs appareils de pulvérisation
DE102006022335A1 (de) Beschichtungsanlage und zugehöriges Betriebsverfahren
DE2819302B2 (de) Lackmengensteuersystem
DE602005005628T2 (de) Verfahren zur herstellung von zweifarbig überzogenen substraten
DE69911829T2 (de) Verfahren zur mehrfarbigen Pulverbeschichtung
EP2743005B1 (fr) Procédé pour peindre une baguette de carrosserie bicolore avec transition continue ainsi que gabarit de marouflage
DE4110598A1 (de) Aufbau einer beschichtungsstrasse und verwendung der beschichtungsstrasse
EP0719185B1 (fr) Procede de production d'un revetement multicouche de peinture de reparation
EP1769852A1 (fr) Méthode et dispositif de revêtement
DE102004033619A1 (de) Beschichtungsverfahren, entsprechende Beschichtungsanlage und damit hergestellte Lackschicht
EP2367639B1 (fr) Procédé pour l'application d'un film de peinture sous forme de film liquide
DE19737065C2 (de) Verfahren, Vorrichtung und eine pastöse Masse zum Aufbringen eines Abdeckstreifens
DE102012205933A1 (de) Verfahren zum Lackieren einesWerkstücks unter Einbeziehung einer einen Farbbeitrag leistenden Grundierungsschicht
EP2976163B1 (fr) Procédé
DE102019212575A1 (de) Radarsensor-Anordnung für ein Kraftfahrzeug sowie Verfahren zur Herstellung einer solchen Radarsensor-Anordnung
DE3214964C2 (de) Verfahren zum Ausbessern des Überzuges eines Gegenstandes
DE19754833A1 (de) Verfahren zur Reparatur lokal begrenzter Fehler in der Lackierung von Teilen, insbesondere Karosserieteilen von Kraftfahrzeugen
DE102007044572B4 (de) Betriebsmittel zur qualitätsgerechten Lackierung einer Frontklappe von Kraftfahrzeugen
EP3167957B1 (fr) Installation de mise en peinture modulaire et procédé de mise en peinture de composants en plastique
DE19945539B4 (de) Sprühbeschichtungsanlage für Fahrzeugkarosserien

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20070907

17Q First examination report despatched

Effective date: 20071012

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080423