DE102004043725A1 - Process for coating a workpiece made of wood or wood-based material - Google Patents
Process for coating a workpiece made of wood or wood-based material Download PDFInfo
- Publication number
- DE102004043725A1 DE102004043725A1 DE102004043725A DE102004043725A DE102004043725A1 DE 102004043725 A1 DE102004043725 A1 DE 102004043725A1 DE 102004043725 A DE102004043725 A DE 102004043725A DE 102004043725 A DE102004043725 A DE 102004043725A DE 102004043725 A1 DE102004043725 A1 DE 102004043725A1
- Authority
- DE
- Germany
- Prior art keywords
- coating
- wood
- workpiece
- based material
- corona treatment
- 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.)
- Ceased
Links
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
- B05D3/14—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 electrical means
- B05D3/141—Plasma treatment
- B05D3/142—Pretreatment
-
- 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
- B05D1/06—Applying particulate materials
-
- 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
- B05D7/06—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 wood
- B05D7/08—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 wood using synthetic lacquers or varnishes
-
- 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
- B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Beschichten eines Werkstücks aus Holz oder einem Holzwerkstoff gemäß dem Oberbegriff des Anspruchs 1.The The present invention relates to a method for coating a workpiece made of wood or a wood-based material according to the preamble of the claim 1.
Aus vielerlei Gründen hat sich die Beschichtung von Werkstücken aus Holz oder Holzwerkstoffen, insbesondere in Form von Möbelplatten, mittels Pulverlacken als besonders vorteilhaft herausgestellt. Ein grundsätzliches Problem stellt dabei jedoch die nicht vorhandene oder nur äußerst geringe elektrische Leitfähigkeit des Materials dar, da diese notwendig ist, um die elektrostatische Pulverbeschichtung in entsprechender Qualität durchführen zu können.Out many reasons has the coating of workpieces of wood or wood-based materials, especially in the form of furniture panels, made especially advantageous by means of powder coatings. One fundamental However, problem is the non-existent or very low electric conductivity of the material, since this is necessary to the electrostatic To perform powder coating in the appropriate quality.
Zur
Verbesserung der Haftfähigkeit
ist es aus der
Üblicherweise wird ein Pulverlack eingesetzt, der eine Schmelztemperatur von etwa 100° Celsius aufweist, so dass die Holzwerkstoffplatte bis zu dieser Temperatur, zumindest jedoch bis nahezu zu dieser Temperatur erwärmt werden muss. Unter Umständen muss eine Nacherwärmung durchgeführt werden, bevor die geschmolzene Pulverlackbeschichtung durch UV-Strahlen ausgehärtet wird.Usually a powder coating is used which has a melting temperature of about 100 ° Celsius has, so that the wood-based panel up to this temperature, but at least to be heated almost to this temperature got to. In certain circumstances needs a reheating be performed, before the molten powder coating by UV rays hardened becomes.
Das bekannte Verfahren birgt jedoch einige, sowohl die Fertigung wie auch die Qualität der Beschichtung einschränkende Nachteile in sich. Dabei ist in erster Linie zu nennen, dass es durch die Erwärmung des Holzwerkstoffs zu Ausgasungen der innenwohnenden Feuchtigkeit kommen kann, die zu Rissbildungen an den Längs- und Querkanten führt. Diese irreversiblen Schäden treten, wie sich gezeigt hat, bereits bei einer Oberflächentemperatur von 90° Celsius und einer Eindringtiefe der Wärmeenergie von etwa 5 mm auf.The However, known methods entail some, both manufacturing and also the quality the coating-limiting Disadvantages in itself. It should be mentioned in the first place that it by the warming of wood-based material to outgassing of moisture in the interior can come, which leads to cracks on the longitudinal and transverse edges. These irreversible damage occur, as has been shown, already at a surface temperature of 90 ° Celsius and a penetration depth of the heat energy of about 5 mm.
Durch die Infrarotbestrahlung des Pulverlacks, zur Erzielung der Schmelztemperatur, bildet sich zunächst eine äußere, gegenüber der darunter liegenden festere Lackschicht der Schmelze, die dazu führt, dass sich durch die Ausgasungen eine im weitesten Sinn löchrige Oberfläche ergibt, die zumindest den optischen, aber auch den haptischen Eindruck der Beschichtung beeinträchtigt.By the infrared irradiation of the powder coating, to obtain the melting temperature, forms first an outer, opposite to the underlying firmer paint layer of the melt, which causes that the outgassing produces a surface that is in the broadest sense holey, the at least the optical, but also the haptic impression of Coating impaired.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art so weiter zu entwickeln, dass mit geringem konstruktiven Aufwand eine qualitative Verbesserung der Beschichtung möglich ist.Of the The present invention is therefore based on the object, a method of the generic type continue to develop that with little design effort a qualitative improvement of the coating is possible.
Diese Aufgabe wird durch ein Verfahren gelöst, das die Merkmale des Anspruchs 1 aufweist.These Task is solved by a method which has the features of the claim 1 has.
Wie sich überraschend gezeigt hat, führt die Koronabehandlung zu einer Verringerung der Oberflächenspannung des Werkstücks aus Holz oder Holzwerkstoff, die eine Erhöhung der Adhäsionskräfte zur Folge hat, wodurch der anschließend aufgetragene Lack, insbesondere der Pulverlack nicht klebend, sondern elektrostatisch anhaftet. Eine intensive Erwärmung der Werkstoffplatte ist nicht mehr erforderlich.As surprisingly has shown leads the corona treatment leads to a reduction of the surface tension of the workpiece made of wood or wood material, which increases the adhesion forces Episode has, causing the subsequent applied paint, especially the powder coating non-sticky, but electrostatically adhered. An intensive heating of the material plate is not necessary anymore.
Die Koronabehandlung führt zwar ebenfalls zu einer gewissen Erwärmung der Oberfläche der Werkstoffplatte, jedoch erstreckt sich diese Erwärmung nur geringfügig in die Tiefe. Dabei kommt es zur Ausgasung der in diesem Bereich befindlichen Feuchtigkeit, jedoch, im Gegensatz zum Stand der Technik, bevor der Pulverlack aufgebracht wird. Das heißt, bei der nachfolgenden Erhitzung des aufgetragenen Pulverlacks zum Zwecke der Schmelzung mittels Infrarot-Licht sind die wärmebeaufschlagten Bereiche unterhalb der Oberfläche der Platte praktisch feuchtigkeitsfrei. Die sich durch den austretenden Wasserdampf ansonsten ergebende Problematik, nämlich die genannten Lackfehler in Form von Löchern oder anderen Unregelmäßigkeiten, treten nun nicht mehr auf.The Corona treatment leads although also to a certain warming of the surface of the material plate, however, this warming extends only slightly into the deep. It comes to the outgassing in this area moisture, but, in contrast to the prior art, before the powder coating is applied. That is, in the subsequent heating of the applied powder coating for the purpose of melting by means Infrared light is the heat-stressed Areas below the surface The plate is virtually moisture-free. The by the exiting water vapor otherwise resulting problems, namely the aforementioned paint defects in the form of holes or other irregularities, do not occur anymore.
Trotzdem wird die für eine erfolgreiche elektrostatische Lackierung mit Pulverlacken notwendige Senkung des Oberflächenwiderstandes erreicht, der < 1010 bis 1011 Ω ist, so dass die Voraussetzungen für eine optimale Beschichtung mit Pulverlack gegeben ist.Nevertheless, the necessary for a successful electrostatic coating with powder coatings lowering of the surface resistance is achieved, which is <10 10 to 10 11 Ω, so that the conditions for an optimal coating with powder coating is given.
Dies trifft gleichermaßen auf eine Nasslackierung zu, für die der Oberflächenwiderstand des Werkstückes ebenfalls in dieser Größenordnung liegt.This meets equally to a wet finish, for the surface resistance of the workpiece also in this order of magnitude.
Das erfindungsgemäße Verfahren führt dazu, dass insbesondere die Pulverlackierung nun auch ohne Fertigungs- und Qualitätsprobleme im Möbelbereich eingesetzt werden kann, wobei die erzielbaren Ergebnisse hinsichtlich der Oberflächenbeschaffenheit auch höchsten Anforderungen gerecht werden. Bemerkenswert ist darüber hinaus, dass durch die verfahrensbedingte Qualitätsverbesserung die Wirtschaftlichkeit des Verfahrens in signifikanter Weise steigt.The inventive method leads to, that, in particular, the powder coating can now also be used without manufacturing and quality problems in the furniture sector can be used, with the achievable results in terms the surface texture also highest To fit in requirements. It is remarkable, moreover, that by the process-related quality improvement the economy of the process increases significantly.
Des weiteren lässt sich das neue Verfahren mit einem geringen apparativen Aufbau realisieren, da Koronabehandlungsanlagen, wie sie bislang für die Erzeugung von Adhäsionskräften an Kunststoffen eingesetzt wurden, durchaus als konfektionierte Vorrichtungen in bestehende Lackieranlagen integriert werden können, ohne dass es wesentlicher konstruktiver Veränderungen bedarf. Dieser Umstand gestattet die Nachrüstung bestehender Beschichtungseinrichtungen, was ebenfalls als ein deutlicher Vorteil anzusehen ist.Furthermore, the new process can be realized with a low apparatus design, since corona treatment plants, as previously for the generation of adhesive forces were used on plastics, can be integrated as pre-assembled devices in existing paint shops, without the need for significant structural changes. This circumstance allows the retrofitting of existing coating equipment, which is also to be regarded as a clear advantage.
Bezüglich der Qualitätsverbesserung ist anzumerken, dass die Koronaentladung auch in den Kantenbereichen eines plattenförmigen Werkstücks mit gleicher Wirkung durchgeführt werden kann wie dies in den flächigen Bereichen der Fall ist, so dass diese Kantenbereiche, die als besonders kritische Bearbeitungszonen angesehen wurden, ebenfalls ohne Qualitätseinbuße mit einem Pulverlack versehen werden können. Insofern ist die Lackierung des plattenförmigen Werkstückes sowohl horizontal wie auch vertikal ausgerichtet möglich, wobei der horizontale Transport einer optimierten Fertigung entgegenkommt.Regarding the quality improvement It should be noted that the corona discharge also in the edge areas a plate-shaped Workpiece with same effect performed can be like this in the plane The areas of the case is such that these edge areas are considered special critical processing zones were considered, also without loss of quality with a Powder coating can be provided. In this respect, the painting of the plate-shaped workpiece is both horizontally as well as vertically aligned possible, with the horizontal Transport meets optimized production.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.advantageous Further developments of the invention are characterized in the subclaims.
Eine Vorrichtung zur Durchführung des Verfahrens wird nachfolgend anhand der beigefügten Zeichnung beschrieben.A Apparatus for carrying out of the method will be described below with reference to the accompanying drawings described.
Die einzige Figur zeigt schematisch eine Vorrichtung zum Beschichten eines Werkstückes in einer perspektivischen Ansicht.The single figure shows schematically a device for coating a workpiece in a perspective view.
In
der Figur ist eine Vorrichtung zum Beschichten eines Werkstückes aus
Holz oder einem Holzwerkstoff mit Flüssig- oder Pulverlack dargestellt,
wobei das Werkstück
insgesamt mit dem Bezugszeichen
Das
Werkstück
Vor
einer Beschichtung des plattenförmigen Werkstücks
Auf
die so vorbereitete Oberfläche
des Werkstücks
Eine
nicht dargestellte Wendeeinrichtung kann sich anschließen, so
dass das Werkstück
Claims (4)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004020411U DE202004020411U1 (en) | 2004-09-10 | 2004-09-10 | Device for coating workpiece of wood or wood material with liquid or powder paint has device for corona treatment arranged after coating device and hardening device |
DE102004043725A DE102004043725A1 (en) | 2004-09-10 | 2004-09-10 | Process for coating a workpiece made of wood or wood-based material |
EP05019648A EP1637235B1 (en) | 2004-09-10 | 2005-09-09 | Process for coating of a furniture panel made of wood with powder coating |
AT05019648T ATE380075T1 (en) | 2004-09-10 | 2005-09-09 | METHOD FOR COATING A FURNITURE BOARD MADE OF A WOOD MATERIAL WITH POWDER COATING |
DE502005002137T DE502005002137D1 (en) | 2004-09-10 | 2005-09-09 | Process for coating a furniture panel made of a wood material with powder coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004043725A DE102004043725A1 (en) | 2004-09-10 | 2004-09-10 | Process for coating a workpiece made of wood or wood-based material |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004043725A1 true DE102004043725A1 (en) | 2006-03-30 |
Family
ID=35429230
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004043725A Ceased DE102004043725A1 (en) | 2004-09-10 | 2004-09-10 | Process for coating a workpiece made of wood or wood-based material |
DE502005002137T Expired - Fee Related DE502005002137D1 (en) | 2004-09-10 | 2005-09-09 | Process for coating a furniture panel made of a wood material with powder coating |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE502005002137T Expired - Fee Related DE502005002137D1 (en) | 2004-09-10 | 2005-09-09 | Process for coating a furniture panel made of a wood material with powder coating |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1637235B1 (en) |
AT (1) | ATE380075T1 (en) |
DE (2) | DE102004043725A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202014103201U1 (en) | 2013-07-11 | 2014-08-20 | Kds Holding Gmbh | Applicator for applying a light-curing composite material |
DE202014103202U1 (en) | 2014-07-11 | 2015-10-13 | Kds Holding Gmbh | Applicator for applying a light-curing composite material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103264004A (en) * | 2013-05-23 | 2013-08-28 | 高碑店顺达墨瑟门窗有限公司 | Wood sprinkling machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2755189B2 (en) * | 1977-12-10 | 1980-11-27 | Detmolder Lackfabrik Niesen & Soehngen, 4930 Detmold | Process for the formation of closed and firmly adhering lacquer layers from UV or EBC lacquers on inhomogeneous, in particular partially printed, substrate surfaces |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE504783C2 (en) | 1995-08-10 | 1997-04-21 | Triline Ab | Powder coating process and plant |
DE19533858B4 (en) * | 1995-09-13 | 2005-09-22 | IHD Institut für Holztechnologie Dresden gGmbH | Process for the electrostatic coating of wood and wood-based materials |
WO1997010903A1 (en) * | 1995-09-22 | 1997-03-27 | Jaervelae Pentti | Method for coating a product |
AU2001286537A1 (en) * | 2000-08-16 | 2002-02-25 | Randall Craft | Process for forming a reflective surface |
US6458250B1 (en) * | 2000-10-26 | 2002-10-01 | E. I. Du Pont De Nemours And Company | Process for the application of powder coatings to non-metallic substrates |
-
2004
- 2004-09-10 DE DE102004043725A patent/DE102004043725A1/en not_active Ceased
-
2005
- 2005-09-09 DE DE502005002137T patent/DE502005002137D1/en not_active Expired - Fee Related
- 2005-09-09 AT AT05019648T patent/ATE380075T1/en not_active IP Right Cessation
- 2005-09-09 EP EP05019648A patent/EP1637235B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2755189B2 (en) * | 1977-12-10 | 1980-11-27 | Detmolder Lackfabrik Niesen & Soehngen, 4930 Detmold | Process for the formation of closed and firmly adhering lacquer layers from UV or EBC lacquers on inhomogeneous, in particular partially printed, substrate surfaces |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202014103201U1 (en) | 2013-07-11 | 2014-08-20 | Kds Holding Gmbh | Applicator for applying a light-curing composite material |
EP2823894A1 (en) | 2013-07-11 | 2015-01-14 | KDS Holding GmbH | Applicator for applying a photocurable composite material |
DE102014109781A1 (en) | 2013-07-11 | 2015-01-15 | Kds Holding Gmbh | Applicator for applying a light-curing composite material |
DE202014103202U1 (en) | 2014-07-11 | 2015-10-13 | Kds Holding Gmbh | Applicator for applying a light-curing composite material |
WO2016004930A1 (en) | 2014-07-11 | 2016-01-14 | Kds Holding Gmbh | Applicator for applying a photocurable composite material over a large surface of an object, and applicator element for an applicator |
Also Published As
Publication number | Publication date |
---|---|
ATE380075T1 (en) | 2007-12-15 |
EP1637235A2 (en) | 2006-03-22 |
EP1637235A3 (en) | 2006-05-03 |
DE502005002137D1 (en) | 2008-01-17 |
EP1637235B1 (en) | 2007-12-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |