ES2326301A1 - Ultraviolet drying method for repairing paint defects in the automotive industry - Google Patents

Ultraviolet drying method for repairing paint defects in the automotive industry Download PDF

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Publication number
ES2326301A1
ES2326301A1 ES200702301A ES200702301A ES2326301A1 ES 2326301 A1 ES2326301 A1 ES 2326301A1 ES 200702301 A ES200702301 A ES 200702301A ES 200702301 A ES200702301 A ES 200702301A ES 2326301 A1 ES2326301 A1 ES 2326301A1
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Prior art keywords
varnish
drying
repaired
ultraviolet
aeration
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ES200702301A
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ES2326301B1 (en
Inventor
Cesar Miro Escarti
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Bulma Tecnologia S L
BULMA TECNOLOGIA SL
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Bulma Tecnologia S L
BULMA TECNOLOGIA SL
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Priority to ES200702301A priority Critical patent/ES2326301B1/en
Priority to EP08805360A priority patent/EP2186574A4/en
Priority to PCT/ES2008/000531 priority patent/WO2009027554A1/en
Publication of ES2326301A1 publication Critical patent/ES2326301A1/en
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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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/005—Repairing damaged coatings
    • 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
    • B05D3/06—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 exposure to radiation
    • B05D3/061—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 exposure to radiation using U.V.
    • 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
    • B05D3/06—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 exposure to radiation
    • B05D3/061—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 exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • 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
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • 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
    • 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
    • B05D7/14—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 to metal, e.g. car bodies

Abstract

The invention relates to a method comprising a step involving the drying of a primed filler, using UV-ray reflectors or heads positioned at a distance of between 100 mm and 1000 mm from the part to be repaired, emitting UV light with a wavelength of between 50 and 650 nm. Said wavelength can be obtained using mercury vapour, or alternatively gallium lamps. The following steps can be performed indiscriminately on the dried, retouched paint surface, namely: a step in which the repaired surface is varnished with UV varnish a step in which the contour of the repaired surface is varnished with anti-fogging UV varnish and a step in which the varnish layer is cured using ultraviolet radiation, all of said steps using UV-ray reflectors and heads.

Description

Procedimiento de reparación de defectos de pintura en sector de la automoción por secado ultravioleta.Defect repair procedure painting in the automotive sector by ultraviolet drying.

Sector técnicoTechnical sector

El procedimiento de reparación de defectos de pintura en el sector de la automoción se emplea dentro de los procesos de fabricación en cadena de componentes de carrocerías en su fase de pintado mediante la utilización de un secado rápido por radiación ultravioleta objeto de la presente invención.The defect repair procedure of paint in the automotive sector is used within the chain manufacturing processes of bodywork components in its painting phase by using a quick drying by ultraviolet radiation object of the present invention.

Técnica anteriorPrior art

La tecnología de secado por radiación de rayos ultravioletas, también llamado tratamiento o curado por UV, es ya conocido y se emplea en el campo de la serigrafía y de adhesivos, de diseño de topografías de productos semiconductores, de aplicaciones médicas en odontología para la polimerización de productos. Dicho curado, supone la polimerización que implica la adherencia, unión y endurecimiento de dos elementos en un mismo producto con componentes de resina plástica que contiene un fotoiniciador. El fotoiniciador es un reactivo químico que provoca el inicio de la polimerización al exponerse a la luz ultravioleta.Lightning radiation drying technology ultraviolet, also called treatment or UV curing, is already known and used in the field of screen printing and adhesives, of topography design of semiconductor products, of medical applications in dentistry for the polymerization of products. Said curing involves the polymerization that implies the adhesion, bonding and hardening of two elements in the same product with plastic resin components containing a photoinitiator The photoinitiator is a chemical reagent that causes the start of polymerization when exposed to light ultraviolet.

La aplicación de rayos ultravioleta con determinadas longitudes de onda en el endurecimiento de películas o capas de poliéster sobre distintos productos es ya conocido, así la Patente de invención ES390290 de ROBERT HILDEBRANT MASCHINENBAU (1971). En el sector de la automoción, la aplicación de tecnología de tratamiento de polimerización por UV es muy reciente, y se está especializando ya que admite diversos procedimientos y resultados técnicos. Así, por ejemplo la Patente alemana DE 10309669 de VOLKSWAGEN AG (2004) que consiste en un procedimiento de secado por radiación ultravioleta de al menos una capa de laca sobre un substrato donde la capa de laca contiene por lo menos una laca UV fotoiniciada y donde se prevé un paso de secado previo por radiación infrarroja; al igual que invenciones que combinan capas de barniz corno la Patente internacional WO2005012816 de EISENMANN MASCHINENBAU (2005). O con más detalle, por juego de intervalos de radiación UV y radiación de rayos infrarrojos y rangos de espectro de los rayos, la patente norteamericana US6528126 E.I. DU PONT DE NEMOURS (2003).The application of ultraviolet rays with certain wavelengths in film hardening or Polyester layers on different products is already known, so the Invention patent ES390290 of ROBERT HILDEBRANT MASCHINENBAU (1971). In the automotive sector, the application of technology of UV polymerization treatment is very recent, and it is specializing since it supports various procedures and results technicians Thus, for example, German Patent DE 10309669 of VOLKSWAGEN AG (2004) consisting of a drying process by ultraviolet radiation of at least one layer of lacquer on a substrate where the lacquer layer contains at least one UV lacquer photoinitiated and where a previous drying step is expected by infrared radiation; like inventions that combine layers of varnish as international patent WO2005012816 of EISENMANN MASCHINENBAU (2005). Or in more detail, by set of intervals of UV radiation and infrared radiation and spectrum ranges of lightning, U.S. Patent US6528126 E.I. DU PONT OF NEMOURS (2003).

Por otro lado la patente europea nº EP1463589 del mismo titular anterior, E.I. DU PONT DE NEMOURS (2004) referida a procedimiento para retocar superficies de sustrato recubiertas, donde hace mención a reparaciones de pintura en el sector automoción por el sistema de radiación infrarroja o "energía térmica" excluyendo el uso de radiación ultravioleta y radiación de haz electrónico. Sin embargo, el uso de radiación infrarroja a diferencia de la radiación ultravioleta supone unos mayores tiempos de secado y un mayor gradiente térmico con calentamiento de la zona afectada.On the other hand European Patent No. EP1463589 of the same previous owner, E.I. DU PONT DE NEMOURS (2004) referred a procedure for retouching coated substrate surfaces, where he mentions paint repairs in the sector automotive by infrared radiation system or "energy thermal "excluding the use of ultraviolet radiation and radiation of electronic beam. However, the use of infrared radiation to difference of ultraviolet radiation means longer times drying and a greater thermal gradient with heating of the area affected.

Problema técnicoTechnical problem

Los procedimientos de tratamiento o curado por radiación UV de endurecimiento y secado rápido de recubrimientos superficiales de pintura están planteados para su primer pintado de todo tipo de materiales o substratos (madera, metal, plásticos, etc...). Es conocido que, que para reparaciones o correcciones de piezas defectuosas, es posible repetir el proceso para conseguir un producto acabado conforme, pero suponen unos costes y tiempos más elevados que encarecen el producto final. Por ello, se plantea un tratamiento específico que no suponga una repetición del proceso completo de pintado, sino solamente de la zona afectada y de su contorno inmediato que sea compatible con el resto de la pieza pintada cumpliendo las exigencias de calidad y ensayos técnicos (tonalidad, brillo, dureza, adherencia, elasticidad, resistencia química, etc...) exigidos para la pieza completa, con carácter interno, por los fabricantes de la automoción.Treatment procedures or curing by UV radiation hardening and rapid drying of coatings Paint surfaces are raised for your first painted all types of materials or substrates (wood, metal, plastics, etc...). It is known that, for repairs or corrections of defective parts, it is possible to repeat the process to get a finished product compliant, but involve more costs and times high that make the final product more expensive. Therefore, a specific treatment that does not involve a repetition of the process full of painted, but only of the affected area and its immediate contour that is compatible with the rest of the piece painted meeting the quality requirements and technical tests (hue, brightness, hardness, adhesion, elasticity, resistance chemistry, etc ...) required for the complete piece, with character internal, by automotive manufacturers.

Las singularidades de las piezas de automoción demuestran que sin un procedimiento específico, un estudio de espesores y viscosidades del producto aplicado, ni de los tiempos de secado y aireación, ni del tipo de superficie donde se aplica, se originan defectos en los productos pintados y acabados que suponen el desprendimiento y desconchado de la pintura o barniz.The singularities of automotive parts demonstrate that without a specific procedure, a study of thicknesses and viscosities of the applied product, nor of the times drying and aeration, or the type of surface where it is applied, defects originate in painted and finished products that They involve the peeling and peeling of the paint or varnish.

Solución técnicaTechnical solution

Con un estudio y ensayos privados sobre el procedimiento empleado en piezas de automoción, se obtiene una solución técnica que permite la recuperación de las piezas defectuosas sin necesidad del desmontaje total del componente afectado centrándose solamente en la zona deteriorada. Para ello, es necesario presentar un procedimiento o tratamiento que de forma drástica acelera los procesos de secado, con las consiguientes ventajas.With a study and private essays on the procedure used in automotive parts, you get a technical solution that allows the recovery of the pieces defective without the need for total component disassembly affected by focusing only on the damaged area. For it, it is necessary to present a procedure or treatment that drastic accelerates the drying processes, with the consequent advantages.

Habitual y convencionalmente, el procedimiento o tratamiento de reparación se desarrolla con las siguientes fases: 1º) Detección del defecto 2º) Clasificación del daño para desvío de la pieza (off line) o reparación en línea (on line), 3º) Preparación de la superficie dañada. Nivelación de abollamientos, en su caso; 4º) Imprimación o aplicación de masilla base, 5º) Secado de la masilla impresa por rayos infrarrojos o por secado con aire; 6º) Lijado de la masilla impresa; 7º) Pintado de la superficie dañada y difuminado de la zona; 8º) Secado de la pintura por rayos infrarrojos o por secado con aire; 9º) Barnizado de la superficie reparada con laca; 10º) Barnizado del contorno de la superficie reparada con barniz antivelo, 11º) Aireación del barniz, 12º) Secado de la capa de barniz, por rayos infrarrojos, o por secado con aire caliente, 13º) Enfriamiento de zona de reparación (20-40 minutos), 14º) Pulido de la zona de reparación, y 15º) Restitución a zona on fine, o almacenamiento a zona de piezas reparadas.Usually and conventionally, the repair procedure or treatment is carried out with the following phases: 1st) Detection of the defect 2nd) Classification of the damage for deviation of the part (off line) or repair on line (on line) , 3rd) Preparation of the damaged surface . Leveling of dents, if applicable; 4th) Primer or application of base putty, 5th) Drying of putty printed by infrared rays or by air drying; 6th) Sanding the printed putty ; 7º) Painting of the damaged and blurred surface of the area ; 8º) Drying of the paint by infrared rays or by air drying; 9º) Varnishing the surface repaired with lacquer ; 10º) Varnishing of the contour of the repaired surface with varnish varnish , 11º) Aeration of the varnish , 12º) Drying of the varnish layer , by infrared rays, or by drying with hot air, 13º) Cooling of repair area (20-40 minutes), 14º) Polishing the repair area, and 15º) Restitution to a fine area, or storage to the area of repaired parts.

En conclusión, a lo largo de todo el proceso de reparación intervienen tres etapas donde es necesario mantener unos tiempos de secado: Secado de pintura, aireación y secado de la capa de barniz, y enfriamiento de la zona de reparación para su pulido. Con esta invención se acortan los tiempos de secado de estas etapas mediante el empleo de un curado de rayos ultravioleta, haciendo innecesario, en la mayoría de los casos, el desmontaje de la pieza dañada por la notable reducción de la temperatura de secado.In conclusion, throughout the entire process of repair involved three stages where it is necessary to maintain about Drying times: Paint drying, aeration and layer drying of varnish, and cooling of the repair area for polishing. With this invention the drying times of these stages are shortened by employing an ultraviolet curing, making unnecessary, in most cases, the disassembly of the piece damaged by the remarkable reduction of the drying temperature.

En función de la clase de sustrato (plásticos, PP, ABS, PA, chapa, metales,...) y dimensiones del daño localizado del recubrimiento, a menudo no es necesario repintar por completo toda la carrocería o componente de la misma, por ejemplo un paragolpes. No solo se obtiene un sistema simplificado, sino mucho más rápido y necesario tanto en el ámbito de reparaciones de pintura en talleres, sino también en el ámbito de retoques durante el recubrimiento original en la línea de producción en serie.Depending on the kind of substrate (plastics, PP, ABS, PA, sheet, metals, ...) and localized damage dimensions of the coating, it is often not necessary to completely repaint the entire body or component thereof, for example a bumper Not only a simplified system is obtained, but much faster and more necessary both in the field of repairs painting in workshops, but also in the field of touch-ups during The original coating on the series production line.

Son conocidos procedimientos de retoques simplificados donde sin perder calidad, se obtienen superficies que son lisas y ópticamente impecables con buena resistencia, satisfaciendo las exigencias convencionales que están establecidas con respecto al retoque de recubrimientos de vehículos, tales como resistencias a los disolventes y a la alteración ocasionada por la exposición al agua y a la intemperie.Touch-up procedures are known simplified where without losing quality, surfaces are obtained that They are smooth and optically flawless with good strength, meeting the conventional requirements that are established with respect to the retouching of vehicle coatings, such as resistance to solvents and the alteration caused by the exposure to water and weather.

Los emisores de radiación ultravioleta pueden ser posicionados a una distancia de 2 a 60 cm de la superficie del sustrato a irradiar, y el tiempo de radiación ultravioleta puede ser, por ejemplo, de 5 segundos a 5 minutos.UV emitters can be positioned at a distance of 2 to 60 cm from the surface of the substrate to radiate, and ultraviolet radiation time can be, for example, from 5 seconds to 5 minutes.

Siendo adecuados emisores de radiación la gama de longitudes de onda, en nanómetros, entre 50 y 750 nm, y preferiblemente entre 50 y 650 nm.The range of radiation emitters being adequate wavelengths, in nanometers, between 50 and 750 nm, and preferably between 50 and 650 nm.

La distancia entre el foco emisor y el objeto puede ser, por ejemplo, de 2 a 60 cm, permitiendo la irradiación sobre geometrías tridimensionales. El tiempo de irradiación puede ser, por ejemplo entre 5 y 300 segundos. Refiriéndose a la duración de una irradiación continua o a la suma de los periodos de distintos ciclos de irradiación. Buscando entre los distintos parámetros soluciones de manera que podamos evitar altas temperaturas superficiales, como por ejemplo de 50 a 150ºC. Evitando de esta manera los efectos perjudiciales de las altas temperaturas, que prolongan preferiblemente la etapa de enfriamiento para su posterior pulido de la zona retocada o reparada.The distance between the emitting bulb and the object it can be, for example, from 2 to 60 cm, allowing irradiation about three-dimensional geometries. The irradiation time can be, for example between 5 and 300 seconds. Referring to the duration of a continuous irradiation or the sum of the periods of Different irradiation cycles. Searching among the different parameters solutions so that we can avoid high surface temperatures, such as 50 to 150 ° C. Avoiding in this way the harmful effects of high temperatures, which preferably extend the stage of cooling for subsequent polishing of the retouched area or repaired

Los espesores de capa de recubrimiento del barniz de curado UV que son curables por medio de radiación ultravioleta son en general aplicadas en espesores de capa, en micrómetros, de 10 a 1000 \mum, y preferiblemente de 10 a 250 \mum.The coating layer thicknesses of the UV curing varnish that are curable by radiation ultraviolet are generally applied in layer thicknesses, in micrometers, from 10 to 1000 µm, and preferably from 10 to 250 \ mum.

Es posible, manteniendo los tiempos de aireación necesarios, que la película de recubrimiento disponga de más de una capa, siendo por ejemplo la aplicación sobre una capa base, aplicar la capa o capas de barniz transparente para su posterior curado UV.It is possible, maintaining aeration times necessary, that the coating film has more than one layer, being for example the application on a base layer, apply the layer or layers of transparent varnish for later curing UV

También puede ser necesario para evitar los efectos de escalón, aplicar el barniz hacia los bordes, con una concentración en sólidos inferior, evitando los cercos, y al que definiremos a partir de ahora como antivelo, por su mayor facilidad a la evaporación.It may also be necessary to avoid Step effects, apply the varnish to the edges, with a lower solids concentration, avoiding fences, and at which we will define from now on as antivelo, for its greater ease to evaporation

Las composiciones de recubrimiento pueden ser acuosas o bien estar diluidas con disolvente o bien no contener disolventes ni agua. En cualquier caso dicho disolvente o agua debe ser eliminado en la fase de aireación. Las composiciones a las que hace referencia la presente invención deberán estar fotoiniciadas y endurecibles por UV.The coating compositions can be aqueous or be diluted with solvent or not contain solvents or water. In any case said solvent or water must be eliminated in the aeration phase. The compositions to which The present invention refers to must be photoinitiated and UV curable.

Las capas de recubrimiento que comprenden una zona defectuosa a retocar, pueden ser consideradas como sustratos formados por varias capas, como recubrimiento habituales de protección, cataforesis, electrolisis, imprimación, de masilla, y capas de base, y en particular de las capas finales de acabado transparente a las que hace referencia la presente invención.Coating layers comprising a faulty area to touch up, can be considered as substrates formed by several layers, as usual coating of protection, cataphoresis, electrolysis, primer, putty, and base layers, and in particular the final finishing layers transparent to which the present invention refers.

Efectos ventajososAdvantageous effects

Esta invención consta de tres ventajas, dos funcionales y otra medioambiental. La primera, a efectos funcionales con el uso de los espesores anteriormente mencionados en los diversos tipos de recubrimiento se logra un secado en profundidad del material tratado, que dota un gran poder de adherencia del barniz con el sustrato, en beneficio de la calidad de producto, y de los procedimientos de homologación técnica y acreditación industrial (NORMAS UNE y NORMAS ISO) en el sector de la automoción.This invention consists of three advantages, two Functional and other environmental. The first, for the purpose functional with the use of the aforementioned thicknesses in the different types of coating a drying is achieved in depth of the treated material, which gives a great power of adhesion of the varnish to the substrate, for the benefit of the quality of product, and the technical approval procedures and industrial accreditation (UNE RULES and ISO RULES) in the sector of the automotive

La segunda ventaja reside en que en este volumen de gramajes y el proceso industrial empleado facilita su adecuación a la normativas medioambientales, puesto que se trata de productos de alto contenido en sólidos que reducen la utilización y la consiguiente emisión de componentes orgánicos volátiles (COV's), como disolventes por ejemplo, que son frecuentemente utilizados en el sector de la automoción. Tales compuestos son perjudiciales para el medioambiente y de menor rendimiento.The second advantage is that in this volume of weights and the industrial process used facilitates its adaptation to environmental regulations, since these are products high solids content that reduce utilization and consequent emission of volatile organic components (VOCs), as solvents for example, which are frequently used in the automotive sector. Such compounds are harmful to The environment and lower performance.

La tercera ventaja y principal es la reducción del tiempo de secado y la posibilidad de poder realizar la fase de pulido casi instantánea, evitando largos periodos de secado que favorecen la posibilidad de contaminaciones de polvo o humedad.The third and main advantage is the reduction of the drying time and the possibility of performing the phase of almost instantaneous polishing, avoiding long drying periods that favor the possibility of contamination of dust or moisture.

Mediante los siguientes ejemplos de ensayos practicados, se resuelven las siguientes soluciones de tiempos de secado:Through the following test examples practiced, the following solutions of times of drying:

Ejemplo 1Example 1

Para un secado de masilla impresa, se disponen los cabezales o reflectores de rayos UV a una distancia entre 300 y 500 mm de la pieza a reparar con una emisión de luz UV comprendida entre 350 y 450 nm de longitud de onda. Consiguiendo unos tiempos de secado comprendidos entre 50 segundos y 1 minuto, a partir de la cual la pieza con masilla secado puede continuar en su proceso fabril.For a drying of printed putty, they are arranged UV heads or reflectors at a distance between 300 and 500 mm of the part to be repaired with an emission of UV light included between 350 and 450 nm wavelength. Getting some time of drying between 50 seconds and 1 minute, from the which piece with dried putty can continue in its process manufacturing. 

       \vskip1.000000\baselineskip\ vskip1.000000 \ baselineskip
Ejemplo 2Example 2

Para un secado de barniz UV y barniz antivelo, se disponen los cabezales o reflectores de rayos UV a una distancia entre 300 y 500 mm de la pieza a reparar con una emisión de luz UV comprendida entre 350 y 450 nm de longitud de onda. Consiguiendo unos tiempos de secado comprendidos entre 20 segundos y 1 minuto, a partir de la cual las piezas barnizadas pueden continuar en su proceso fabril.For drying of UV varnish and antivelo varnish, UV heads or reflectors are arranged at a distance between 300 and 500 mm of the part to be repaired with a UV light emission between 350 and 450 nm wavelength. Getting drying times between 20 seconds and 1 minute, at from which the varnished parts can continue in their manufacturing process

Descripción de las figurasDescription of the figures

Para una mejor comprensión de las características generales anteriormente mencionadas, se acompaña un dibujo a la presente invención el cual expone como se especifica a continuación las fases completas de un proceso de reparación, de entre las cuales intervienen los procedimientos de secado:For a better understanding of General characteristics mentioned above, a drawing to the present invention which exposes as specified to then the complete phases of a repair process, of among which the drying procedures are involved:

Figura 1: 1º) Retoque de la superficie Imprimación o aplicación de masilla base, 2º) Secado de la masilla impresa por rayos UV, o por infrarrojos, o por secado con aire; 3º) Lijado de la masilla impresa; 4º) Pintado de la superficie retocada y difuminado de la zona; 5º) Secado de la pintura por rayos infrarrojos o por secado con aire; 6º) Barnizado de la superficie reparada con barniz UV; 7º) Barnizado del contorno de la superficie reparada con barniz antivelo UV., 8º) Aireación del barniz, 9º) Curado de la capa de barniz por radiación ultravioleta, 10º) Enfriamiento de zona de reparación (5-10 minutos), 11º) Pulido de la zona de reparación, y 12º) Reposición a zona on line, o almacenamiento a zona de piezas reparadas.Figure 1: 1st) Surface retouching Primer or application of base putty, 2nd) Drying of putty printed by UV, or infrared, or by air drying; 3rd) Sanding the printed putty ; 4th) Painting of the retouched and blurred surface of the area ; 5th) Drying the paint by infrared rays or by air drying; 6º) Varnishing the surface repaired with UV varnish ; 7º) Varnishing of the contour of the repaired surface with UV varnish varnish. , 8º) Aeration of the varnish , 9º) Curing of the varnish layer by ultraviolet radiation, 10º) Cooling of the repair area (5-10 minutes), 11º) Polishing of the repair zone, and 12º) Replacement to the online zone , or storage area of repaired parts.

Modo de realizar la invenciónHow to carry out the invention

El secado por radiación ultravioleta se realiza mediante unos sistemas de cabezales o reflectores de rayos UV dispuestos en las fases donde se encuentra operativo entre 100 mm y 1000 mm de distancia para adaptarse a la tridimensionalidad de la pieza a reparar con una emisión de luz UV comprendida entre 50 y 650 nm de longitud de onda. Dicha longitud de onda se podrá alcanzar utilizando lámparas de vapor de mercurio y/o galio, consiguiendo unos tiempos de secado comprendidos entre 5 y 300 segundos.Drying by ultraviolet radiation is performed using UV head or reflector systems arranged in the phases where it is operational between 100 mm and 1000 mm distance to adapt to the three-dimensionality of the part to be repaired with a UV light emission between 50 and 650 nm wavelength. This wavelength may be achieve using mercury and / or gallium vapor lamps, getting drying times between 5 and 300 seconds.

Las fases donde puede encontrarse operativo el secado por radiación son: la fase de secado de la masilla impresa (fase 2ª), la fase de barnizado de la superficie reparada con barniz UV (fase 6ª), la fase de barnizado del contorno de la superficie reparada con barniz antivelo UV (fase 7ª), y la fase de curado de la capa de barniz por radiación ultravioleta (fase 9ª).The phases where the Radiation drying are: the drying phase of the printed putty (2nd phase), the varnishing phase of the repaired surface with UV varnish (6th phase), the contour varnishing phase of the surface repaired with UV varnish (phase 7), and the phase of curing of the varnish layer by ultraviolet radiation (phase 9th).

Claims (4)

1. Procedimiento de reparación de defectos de pintura en sector de la automoción por secado ultravioleta para medios ya conocidos y sucesivos de imprimación y lijado, pintado y difuminado, aireación, enfriamiento, pulido, y reposición de la pieza tratada al proceso de producción caracterizado porque consiste en una fase de secado de la masilla impresa en que intervienen cabezales o reflectores de rayos UV dispuestos entre 100 mm y 1000 mm de distancia de la pieza a reparar con una emisión de luz UV comprendida entre 50 y 650 nm de longitud de onda. Dicha longitud de onda se podrá alcanzar utilizando lámparas de vapor de mercurio, o alternativamente galio.1. Procedure for repairing paint defects in the automotive sector by ultraviolet drying for known and successive means of priming and sanding, painting and blurring, aeration, cooling, polishing, and replacement of the treated part to the production process characterized by It consists of a drying phase of the printed putty in which UV heads or reflectors intervened between 100 mm and 1000 mm away from the part to be repaired with a UV light emission between 50 and 650 nm wavelength are involved. Said wavelength may be achieved using mercury vapor lamps, or alternatively gallium. 2. Procedimiento de reparación de defectos de pintura en sector de la automoción por secado ultravioleta para medios ya conocidos y sucesivos de imprimación y lijado, pintado y difuminado, aireación, enfriamiento, pulido, y reposición de la pieza tratada al proceso de producción conforme a la Reivindicación 1 caracterizado porque consiste en una fase complementaria o alternativa a la masilla impresa de barnizado de la superficie reparada con barniz UV.2. Procedure for repairing paint defects in the automotive sector by ultraviolet drying for known and successive means of priming and sanding, painting and blurring, aeration, cooling, polishing, and replacement of the part treated to the production process according to Claim 1 characterized in that it consists of a complementary or alternative phase to the printed surface varnish putty repaired with UV varnish. 3. Procedimiento de reparación de defectos de pintura en sector de la automoción por secado ultravioleta para medios ya conocidos y sucesivos de imprimación y lijado, pintado y difuminado, aireación, enfriamiento, pulido, y reposición de la pieza tratada al proceso de producción conforme a la Reivindicaciones 1 y 2 caracterizado porque consiste en una fase complementaria o alternativa a la masilla impresa y barniz UV de barnizado del contorno de la superficie reparada con barniz antivelo UV.3. Procedure for repairing paint defects in the automotive sector by ultraviolet drying for known and successive means of priming and sanding, painting and blurring, aeration, cooling, polishing, and replacement of the part treated to the production process according to Claims 1 and 2 characterized in that it consists of a complementary or alternative phase to the printed putty and UV varnish varnishing the contour of the surface repaired with UV varnish. 4. Procedimiento de reparación de defectos de pintura en sector de la automoción por secado ultravioleta para medios ya conocidos y sucesivos de imprimación y lijado, pintado y difuminado, aireación, enfriamiento, pulido, y reposición de la pieza tratada al proceso de producción conforme a la Reivindicaciones 1, 2 y 3 caracterizado porque consiste en una fase complementaria de curado de la capa de barniz UV y/o barniz antivelo aplicado/s mediante radiación ultravioleta tras el primer secado base.4. Procedure for repairing paint defects in the automotive sector by ultraviolet drying for known and successive means of priming and sanding, painting and blurring, aeration, cooling, polishing, and replacement of the part treated to the production process according to Claims 1, 2 and 3 characterized in that it consists of a complementary curing phase of the UV varnish layer and / or applied varnish varnish by ultraviolet radiation after the first base drying.
ES200702301A 2007-08-09 2007-08-09 PROCEDURE FOR REPAIR OF PAINT DEFECTS IN THE AUTOMOTIVE SECTOR BY ULTRAVIOLET DRYING. Expired - Fee Related ES2326301B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES200702301A ES2326301B1 (en) 2007-08-09 2007-08-09 PROCEDURE FOR REPAIR OF PAINT DEFECTS IN THE AUTOMOTIVE SECTOR BY ULTRAVIOLET DRYING.
EP08805360A EP2186574A4 (en) 2007-08-09 2008-07-30 Ultraviolet drying method for repairing paint defects in the automotive industry
PCT/ES2008/000531 WO2009027554A1 (en) 2007-08-09 2008-07-30 Ultraviolet drying method for repairing paint defects in the automotive industry

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ES200702301A ES2326301B1 (en) 2007-08-09 2007-08-09 PROCEDURE FOR REPAIR OF PAINT DEFECTS IN THE AUTOMOTIVE SECTOR BY ULTRAVIOLET DRYING.

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WO2002098581A1 (en) * 2001-06-04 2002-12-12 E.I. Du Pont De Nemours And Company Process for multilayer coating of substrates
US6531188B1 (en) * 1997-11-20 2003-03-11 E. I. Du Pont De Nemours And Company Method for multi-layered coating of substrates
WO2006098812A1 (en) * 2005-01-26 2006-09-21 E.I. Dupont De Nemours And Company Process for vehicle repair coating

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US6958171B2 (en) 2001-12-14 2005-10-25 E. I. Du Pont De Nemours And Company Process for repairing coated substrate surfaces
DE10309669A1 (en) 2003-03-06 2004-09-16 Volkswagen Ag Varnish drying method for panel in car manufacturing industry, by applying ultraviolet radiation to the film of varnish coated on the panel
EP1651917B1 (en) 2003-07-24 2012-03-21 Eisenmann AG Device for hardening an object coating which is made of a material hardening by electromagnetic radiation action, in particular uv-varnish or thermohardening varnish
US20070116866A1 (en) * 2005-11-18 2007-05-24 Basf Corporation Quick method for repairing damage to a finish on a substrate

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US6531188B1 (en) * 1997-11-20 2003-03-11 E. I. Du Pont De Nemours And Company Method for multi-layered coating of substrates
US6332291B1 (en) * 1998-04-27 2001-12-25 Herberts Gmbh & Co. Kg Radiation-curable coatings and their use
WO2002098581A1 (en) * 2001-06-04 2002-12-12 E.I. Du Pont De Nemours And Company Process for multilayer coating of substrates
WO2006098812A1 (en) * 2005-01-26 2006-09-21 E.I. Dupont De Nemours And Company Process for vehicle repair coating

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WO2009027554A1 (en) 2009-03-05
EP2186574A1 (en) 2010-05-19
WO2009027554A4 (en) 2009-04-30
EP2186574A4 (en) 2012-01-04

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