EP0346754B1 - Procédé pour réparer des défauts dans des revêtements - Google Patents

Procédé pour réparer des défauts dans des revêtements Download PDF

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Publication number
EP0346754B1
EP0346754B1 EP19890110312 EP89110312A EP0346754B1 EP 0346754 B1 EP0346754 B1 EP 0346754B1 EP 19890110312 EP19890110312 EP 19890110312 EP 89110312 A EP89110312 A EP 89110312A EP 0346754 B1 EP0346754 B1 EP 0346754B1
Authority
EP
European Patent Office
Prior art keywords
polishing
polishing process
supercooled
carried out
coating
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 - Lifetime
Application number
EP19890110312
Other languages
German (de)
English (en)
Other versions
EP0346754A2 (fr
EP0346754A3 (en
Inventor
Johann Benning
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0346754A2 publication Critical patent/EP0346754A2/fr
Publication of EP0346754A3 publication Critical patent/EP0346754A3/de
Application granted granted Critical
Publication of EP0346754B1 publication Critical patent/EP0346754B1/fr
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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes

Definitions

  • the invention relates to a method of the type specified in the preamble of the first claim.
  • Polishable paints have so far been used for painting workpieces made of metal or thermosetting plastic materials. If painting defects occur, mainly dust inclusions or the like, these can be eliminated by sanding with the finest sandpaper possible and then polishing with a suitable polishing agent. Polishing is done either by hand or with a polishing machine with the help of cotton wool, lambskin or felt.
  • elastic lacquers for example highly or medium-elastic lacquers, in particular 2-component polyurethane lacquers based on polyester or lacquers based on acrylate.
  • These paints are elastic and are particularly suitable for painting highly elastic workpieces. In this case, deformation prevents the paint from splintering off.
  • This method has the disadvantage that the polishing point remained matt during polishing operations on surfaces with a surface temperature of greater than 0 ° C. If the polishing process is carried out on surfaces with surface temperatures below 0 ° C with the continuous supply of cold gas, the polishing agent, because it contains water, is constantly iced up, which also means that no high-gloss polishing points can occur.
  • This method has the disadvantage that the polishing point remained matt during polishing operations on surfaces with a surface temperature of greater than 0 ° C. If the polishing process is carried out on surfaces with surface temperatures below 0 ° C with the continuous supply of cold gas, the polishing agent, because it contains water, is constantly iced up, which also means that no high-gloss polishing points can occur.
  • the object of the present invention is to provide a method for repairing defects in paints, in particular in lacquers, of workpieces provided with elastic paints, which does not have the disadvantages mentioned above and, in particular after the polishing process has ended, does not visually identify the polished area.
  • Post-polishing (finishing) with polish and polishing without polishing agent is carried out at a supercooled coating point.
  • the point to be polished is thus cooled after grinding and before the first polishing process. After cooling has been reached, the cooling is interrupted and the polishing process begins.
  • the polish increases the paint temperature to above -10 ° C and the polish cannot be stopped immediately, it must be interrupted and the lacquer area to be processed must be cooled again.
  • polishing The necessary polishing process (finishing) with Polish must also be carried out on the supercooled paint.
  • the ground areas are then cooled with the aid of, for example, gaseous nitrogen at approx. -160 ° C.
  • gaseous nitrogen at approx. -160 ° C.
  • the area to be cooled is limited beforehand with foam. Through openings are provided for the gas, so that a gas flow and no gas jam is always possible.
  • the gas outlet temperature can be influenced by providing the nitrogen reservoir with a heater.
  • the pressure in the nitrogen storage container is adjusted by the heating and thereby the outflow rate of the nitrogen is influenced; i.e. the higher the heating power, the higher the pressure in the storage container and the faster and therefore colder the nitrogen escapes from the storage container to the area to be cooled.
  • polishing process begins. For this purpose, the supply of the cooling gas is switched off.
  • the polishing agent e.g. Herberts® polishing paste is applied. Since this is a water-based polishing agent, it immediately freezes on the cooled lacquer area. Subsequently, further cooling gas is polished without supply. Polishing should be done mechanically using lambskin hoods with a polishing agent suitable for the paint. Here, polishing machine speeds of approximately 4,500 rpm have proven to be sufficient.
  • the polishing process should be stopped or interrupted when the paint surface to be processed is heated to approx. -10 ° C.
  • the polishing process still not completed, it must be interrupted and the area to be processed cooled again. As soon as the area still to be processed has cooled down again to approx. -40 ° C, the interrupted polishing process can be continued again.
  • polish e.g. Finesse - it® from 3M Germany. To do this, cool it down again to below -10 ° C and finish polishing and polishing without polishing agent before the paint on the area to be processed is heated to above -10 ° C. Wiping or polishing by hand then no longer needs to be carried out on the supercooled paint.
  • Polish e.g. Finesse - it® from 3M Germany.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (5)

  1. Procédé de correction du défaut dans des peintures, en particulier des inclusions de poussières dans des peintures laques, pour des pièces couvertes de revêtements à haute élasticité, dont les défauts sont corrigés par un ponçage puis un polissage effectués sur le revêtement refroidi, caractérisé en ce qu'après le ponçage, mais avant le polissage, la surface à polir est refroidie par un courant de gaz réfrigérant, le polissage, après interruption du courant gazeux, n'étant effectué que sur la peinture refroidi.
  2. Procédé selon la revendication 1, caractérisé en ce que le polissage commence lorsque la température de la peinture dans la zone défectueuse est descendue à -40° C au moins, et se termine avant que la température soit remontée à 0° au maximum.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le polissage est interrompu lorsque la température est remontée à -10° C, puis repris et achevé après un nouveau refroidissement de la zone défectueuse.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le polissage ultérieur nécessaire (finition) effectué par emploi de polish ainsi que surpolissage sans agent de polissage sont exécutés également sur peinture refroidie.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le polissage est effectué à la machine à disque recouvert d'une bonnette de peau de mouton et tournant à une vitesse d'environ 4500 t/mn.
EP19890110312 1988-06-11 1989-06-07 Procédé pour réparer des défauts dans des revêtements Expired - Lifetime EP0346754B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819973A DE3819973C1 (fr) 1988-06-11 1988-06-11
DE3819973 1988-06-11

Publications (3)

Publication Number Publication Date
EP0346754A2 EP0346754A2 (fr) 1989-12-20
EP0346754A3 EP0346754A3 (en) 1990-11-22
EP0346754B1 true EP0346754B1 (fr) 1992-12-16

Family

ID=6356379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890110312 Expired - Lifetime EP0346754B1 (fr) 1988-06-11 1989-06-07 Procédé pour réparer des défauts dans des revêtements

Country Status (3)

Country Link
EP (1) EP0346754B1 (fr)
DE (2) DE3819973C1 (fr)
ES (1) ES2037332T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003319A1 (de) * 2008-01-07 2009-07-09 Volkswagen Ag Verfahren zum Bearbeiten einer mit einem Nanolack lackierten Oberfläche

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804588A1 (de) * 1988-02-13 1989-05-11 Bayer Ag Verfahren zum polieren von lackoberflaechen
DE3910590C2 (de) * 1989-04-01 1997-10-16 Messer Griesheim Gmbh Handpoliermaschine
DE3943491C1 (en) * 1989-04-01 1991-08-29 Messer Griesheim Gmbh, 6000 Frankfurt, De Cold gas generator and feeder to grinding and polishing tool(s) - has gas mixt. container in line from liquefied gas reservoir to tool(s)
ES2059858T3 (es) * 1989-04-01 1994-11-16 Messer Griesheim Gmbh Dispositivo de pulido o esmerilado.
DE3910581A1 (de) * 1989-04-01 1990-10-04 Messer Griesheim Gmbh Kaltgasbearbeitungseinrichtung
DE3910582C1 (en) * 1989-04-01 1990-06-28 Messer Griesheim Gmbh, 6000 Frankfurt, De Temperature-controlling device
DE4238013A1 (de) * 1992-11-11 1994-05-19 Linde Ag Verfahren zum Abkühlen von Flächenteilen
DE19539065A1 (de) * 1995-10-20 1997-04-24 Audi Ag Verfahren zum Ausbessern von Beschichtungsfehlern
DE19623931C1 (de) * 1996-06-15 1997-07-17 Herberts Gmbh Verfahren zum Polieren und/oder Schleifen von Lackoberflächen und Kaltgasbearbeitungsgerät zur Durchführung des Verfahrens
DE19802705A1 (de) * 1998-01-24 1999-07-29 Bayerische Motoren Werke Ag Vorrichtung zum Einebnen von erhöhten Lackstellen
DE19809982B4 (de) * 1998-03-09 2007-09-27 Volkswagen Ag Verfahren zum kleinflächigen Reparieren von Lackfehlerstellen einer Lackbeschichtung
ITUB20156872A1 (it) * 2015-12-09 2017-06-09 Eurosider Sas Di Milli Ottavio & C Dispositivo e metodo per la verniciatura di manufatti verniciati.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862135A (en) * 1928-02-24 1932-06-07 Edmond H Bucy Means for rubbing coated surfaces
DE3804588A1 (de) * 1988-02-13 1989-05-11 Bayer Ag Verfahren zum polieren von lackoberflaechen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003319A1 (de) * 2008-01-07 2009-07-09 Volkswagen Ag Verfahren zum Bearbeiten einer mit einem Nanolack lackierten Oberfläche

Also Published As

Publication number Publication date
DE3819973C1 (fr) 1988-12-29
EP0346754A2 (fr) 1989-12-20
EP0346754A3 (en) 1990-11-22
ES2037332T3 (es) 1993-06-16
DE58902999D1 (de) 1993-01-28

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