EP0963795A1 - Verfahren zum Pulverlackieren von Bauteilen - Google Patents
Verfahren zum Pulverlackieren von Bauteilen Download PDFInfo
- Publication number
- EP0963795A1 EP0963795A1 EP98110718A EP98110718A EP0963795A1 EP 0963795 A1 EP0963795 A1 EP 0963795A1 EP 98110718 A EP98110718 A EP 98110718A EP 98110718 A EP98110718 A EP 98110718A EP 0963795 A1 EP0963795 A1 EP 0963795A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- components
- wetted
- component
- powder coating
- conductive
- 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.)
- Granted
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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
- 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
Definitions
- the invention relates to a method according to the preamble of patent claim 1.
- Known methods for powder coating are used for electrical components conductive materials, mainly of metal.
- One, for example, is placed on the components positive, charge applied before the one with an opposite one Cargo, e.g. negatively charged powder coating is sprayed on. Because of the opposite charges, the powder coating adheres to the component. Of the adhering powder coating is then baked at an elevated temperature.
- the process is the powder coating of components made of electrically non-conductive Materials not possible because no load can be applied to such components.
- each component Equipment By placing only an electrically or electrostatically chargeable on the surface of each component Equipment is applied that allows the oppositely charged Adhesion of powder coating before baking remains in the component its predetermined Get properties. Subsequent, complex and costly Checks whether the original properties or the desired properties of the non-conductive material or within a tolerance range, omitted, since only the surface is made conductive or chargeable with the aid of the equipment has been. After applying the equipment, the component can be like a Powder-coated component made of conductive material.
- the equipment is applied by superficial wetting, in order to adhere the powder coating.
- wetting is carried out by dipping, spraying or steaming or equivalent technical processes. This is justifiable simpler apparatus Effort required.
- each component is wetted in a salt bath, which is the lead solution contains.
- the liquid master solution also achieves with complex surface designs of the component all surface areas relevant for powder coating, i.e. also Undercuts, bores and the like, and is stored in a uniform Layer with a uniform distribution, so that uniform for the powder coating Prison conditions are created.
- the at least one salt in a liquid is in the lead solution dissolved, which can be water and / or alcohol.
- the liquid is called a store and transport medium for the salt used to keep this even on the surface to distribute the component.
- the liquid drains off after the equipment has been applied Remove again with little technical effort, with alcohol being the advantage higher volatility than water.
- a quaternary alkyl ammonium salt is particularly suitable as equipment.
- the wetted component is then dried so that the Equipment provides optimal adhesion conditions for the powder coating.
- the components are pre-dried before wetting to easily to drive out volatile constituents which would adversely affect the adhesion of the powder coating could. This allows the quality of the subsequent painting to be improved.
- the cooling conditions are favorable for subsequent wetting created.
- a procedural under Possibly unfavorable time pressure for the sequence of the process steps between pre-drying and wetting avoided.
- the predrying is individually tailored to the material and / or the formation of the components. So little time is wasted as possible.
- Fig. 1 is at least one made of electrically non-conductive material Component 1 in a first method step A in a basin 2 into a master solution 3, e.g. immersed in a salt bath.
- a master solution e.g. immersed in a salt bath.
- Salt of the lead solution 3 a quaternary alkyl ammonium salt can be used, that is dissolved in a liquid.
- step B e.g. then the one with the lead solution 3 wetted component placed on a paint holder 4.
- the component 1 or the conductive solution 3 adhering to its surface electrically or electrostatically charged, e.g. positively charged.
- powder coating 5 e.g. with spray guns or spray nozzles 6, onto the surface of component 1 are applied. Due to the opposite charges from Conductive solution 3 or component 1 and powder coating 5, the powder coating 5 adheres to the surface of component 1.
- the powder coating 5 is covered with suitable means Treated to preferably 150 to 180 ° C for a predetermined period of time, to uniformly coat the surface of component 1 and subsequently harden. This can be for about 10 to 20 minutes and continuously or intermittently respectively.
- a pretreatment step A1 is a component 11 made of at least one electrically non-conductive material freed from volatile components that would otherwise occur during the paint hardening process could volatilize what the paint adhesion and / or surface quality would adversely affect.
- Pretreatment step A1 includes predrying, for example with a continuous or discontinuous process, e.g. in one Convection oven.
- Other devices can also be used for predrying, e.g. a Dry air oven, a vacuum dryer, an infrared dryer or a microwave dryer.
- Parameters to be taken into account during predrying are e.g. the salary more volatile Proportions or the wall thickness of the respective component.
- Predrying can take up to last for several hours at 180 ° C. The higher the temperature during predrying is, the faster the predrying takes place. The greater the wall thickness of the component is, the slower the predrying is. The less volatile parts in the material are available, the shorter the necessary pre-drying time. Little volatile For example, parts can already be injected in molded plastic components Obtain evacuation of the injection mold during the injection molding process become. Such a step in the injection molding process can be part of the pretreatment on.
- the predried component 11 is cooled, preferably to room temperature. Such cooling will later optimal quality properties of the paint achieved.
- the non-conductive material-related or non-conductive components 11, e.g. for a few seconds, in one with one Lead solution 13 filled basin 12 submerged.
- the control solution 13 contains the already mentioned salt dissolved in a liquid substance.
- the liquid substance can be water be. It is cheaper to use alcohol as a liquid substance because alcohol is evaporates more quickly during subsequent drying.
- the components 11 are then left to drain in method step A4 and, e.g. at room temperature, completely dried. To speed up the drying, it may be beneficial to use elevated temperatures. Preferably is dried for 2 to 15 minutes at approx. 25 to 70 ° C.
- drying can be simplified in process step A4 if the from the pre-drying of components 11 that are still warm into the lead solution 13 (process step A3) are dipped. This is how the drying process in process step A4 the energy of the warm components is used for drying, and is only used after cooled down after wetting.
- powder coating 15 is applied as in Fig. 1, e.g. with spray devices 16, and cured in process step B2.
- Each component 11 is previously on the paint holder 4 with the desired charge, so that oppositely charged powder coating 15 adheres uniformly.
- the process can be used for all types of electrically non-conductive materials.
- This can e.g. reinforced and unreinforced polyamides, polyesters, polyurethanes, but also glass, ceramics, thermosets and wood.
- Restrictions on The types of materials for which the method can be used can result from the temperature resistance of the respective material in the case of the lacquer hardening required Temperatures of approx. 150 to 180 ° C result.
- the process can offer an even greater choice on paintable non-conductive materials such as plastic with lower melting or Include glass transition area.
- the lead solution or the conductive particles in the electrically non-conductive materials used or from these components not only stick to the surface, but at least slightly penetrate or diffuse into the surface. This has for the desired properties of the components have no significant negative impact.
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Glanulating (AREA)
Abstract
Description
- Fig. 1
- schematisch ein grundsätzliches Verfahren zum Pulverlackieren von Bauteilen aus elektrisch nichtleitenden Werkstoffen, und
- Fig. 2
- einen optimierten Gesamtverfahrensablauf in schematischer Darstellung.
Claims (13)
- Verfahren zum Pulverlackieren von Bauteilen aus elektrisch nichtleitenden Werkstoffen, dadurch gekennzeichnet, daß auf die an sich nicht elektrisch leitende Oberfläche eine elektrisch leitende Ausrüstung stoffschlüssig aufgebracht und zum Anhaften eines entgegengesetzt aufgeladenen Pulverlackes an die Oberfläche elektrisch oder elektrostatisch aufgeladen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß jeder Bauteil (1, 11) in einem ersten Verfahrensschritt (A, A3) mit einer Leitlösung (3, 13) zumindest oberflächlich benetzt wird, daß auf den benetzten Bauteil eine Ladung aufgebracht wird, und daß in einem weiteren Verfahrensschritt (B, B1, B2) entgegengesetzt aufgeladener Pulverlack (5, 15) aufgebracht, angehaftet und anschließend ausgehärtet wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß jeder Bauteil (1, 11) durch Tauchen in oder Besprühen oder Bedampfen mit der Leitlösung (3, 13) benetzt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß jeder Bauteil (1, 11) in einem die Leitlösung (3, 13) bildenden Salzbad benetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Leitlösung (3, 13) wenigstens ein in einer Flüssigkeit gelöstes Salz enthält, und daß als Flüssigkeit Waser und/oder Alkohol verwendet wird bzw. werden.
- Verfahren nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß die Leitlösung (3, 13) ein quarternäres Alkyl-Ammonium-Salz enthält.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die mit der Leitlösung (3, 13) benetzten Bauteile (1, 11) getrocknet werden.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die benetzten Bauteile (1, 11) bei Raumtemperatur getrocknet werden.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die benetzten Bauteile (1, 11) bei erhöhter Temperatur getrocknet werden, vorzugsweise über sechs bis zehn Minuten bei ca. 30°C.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Bauteile (1, 11) vor dem Benetzen mit der Leitlösung (3, 13) von leicht flüchtigen Bestandteilen befreit werden, vorzugsweise durch kontinuierliche oder diskontinuierliche Vortrocknung während eines Vorbehandlungsschrittes (A1) unter erhöhter Temperatur, z.B. in einem Umluftofen.
- Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß die Bauteile (1, 11) nach dem Vortrocknen in etwa auf Raumtemperatur abgekühlt werden.
- Verfahren nach wenigstens einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die vorgetrockneten Bauteile (1, 11) in noch warmem Zustand mit der Leitlösung (3, 13) benetzt und erst dann getrocknet und/oder abgekühlt werden.
- Verfahren nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Vortrocknung unter Berücksichtigung von bauteilspezifischen und/oder werkstoffspezifischen Parametern vorgenommen wird, vorzugsweise in Abhängigkeit von der Bauteil-Wandstärke und/oder dem Gehalt an leicht flüchtigen Werkstoff-Bestandteilen.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT98110718T ATE221419T1 (de) | 1998-06-10 | 1998-06-10 | Verfahren zum pulverlackieren von bauteilen |
EP98110718A EP0963795B1 (de) | 1998-06-10 | 1998-06-10 | Verfahren zum Pulverlackieren von Bauteilen |
DE59804999T DE59804999D1 (de) | 1998-06-10 | 1998-06-10 | Verfahren zum Pulverlackieren von Bauteilen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98110718A EP0963795B1 (de) | 1998-06-10 | 1998-06-10 | Verfahren zum Pulverlackieren von Bauteilen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0963795A1 true EP0963795A1 (de) | 1999-12-15 |
EP0963795B1 EP0963795B1 (de) | 2002-07-31 |
Family
ID=8232108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98110718A Expired - Lifetime EP0963795B1 (de) | 1998-06-10 | 1998-06-10 | Verfahren zum Pulverlackieren von Bauteilen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0963795B1 (de) |
AT (1) | ATE221419T1 (de) |
DE (1) | DE59804999D1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005013230A1 (de) * | 2005-03-18 | 2006-09-28 | L. Schulte & Co. Gmbh | Verfahren zur elektrostatischen Pulverbeschichtung von hitzebeständigen Kunststoffteilen sowie Mittel zur Herstellung einer leitfähigen Schicht |
EP1782892A3 (de) * | 2005-11-07 | 2008-05-14 | EISENMANN Anlagenbau GmbH & Co. KG | Vorrichtung und Verfahren zur Oberflächenbehandlung von Werkstücken |
EP1936318A1 (de) | 2006-12-21 | 2008-06-25 | Steyr-Daimler-Puch Spezialfahrzeug GmbH | Verfahren zur Herstellung einer Zusatzpanzerung |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1099713A (en) * | 1964-02-17 | 1968-01-17 | Ransburg Electro Coating Corp | Compositions for coating insulating materials |
GB1198462A (en) * | 1966-09-27 | 1970-07-15 | Hommel Company O | Method of Electrostatic Application of Vitreous Frit Coatings to Glass and Other Ceramic Materials |
DE1571125A1 (de) * | 1961-03-06 | 1970-11-26 | Ransburg Electro Coating Corp | Verfahren zum elektrostatischen UEberziehen von Gegenstaenden |
FR2429620A1 (fr) * | 1978-06-29 | 1980-01-25 | Suhl Elektrogeraete Veb K | Procede de traitement superficiel de pieces en materiau isolant par application electrostatique |
EP0114252A1 (de) * | 1982-12-16 | 1984-08-01 | Fulgurit GmbH & Co. Kommanditgesellschaft | Vorrichtung zur elektrostatischen Spritzlackierung |
WO1992022912A1 (en) * | 1991-06-12 | 1992-12-23 | Henkel Corporation | Composition and method for enhancing the surface conductivity of thermoplastic surfaces |
FR2713518A1 (fr) * | 1993-12-14 | 1995-06-16 | Applic Peintures Ste Indle | Procédé pour réaliser par voie électrostatique un revêtement en résine époxy sur des objets en matière plastique. |
DE4417172A1 (de) * | 1994-05-17 | 1995-11-23 | Worwag Lack Farbenfabrik Gmbh | Verfahren zur elektrostatischen Pulverbeschichtung nichtleitender Gegenstände |
-
1998
- 1998-06-10 EP EP98110718A patent/EP0963795B1/de not_active Expired - Lifetime
- 1998-06-10 DE DE59804999T patent/DE59804999D1/de not_active Expired - Fee Related
- 1998-06-10 AT AT98110718T patent/ATE221419T1/de not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1571125A1 (de) * | 1961-03-06 | 1970-11-26 | Ransburg Electro Coating Corp | Verfahren zum elektrostatischen UEberziehen von Gegenstaenden |
GB1099713A (en) * | 1964-02-17 | 1968-01-17 | Ransburg Electro Coating Corp | Compositions for coating insulating materials |
GB1198462A (en) * | 1966-09-27 | 1970-07-15 | Hommel Company O | Method of Electrostatic Application of Vitreous Frit Coatings to Glass and Other Ceramic Materials |
FR2429620A1 (fr) * | 1978-06-29 | 1980-01-25 | Suhl Elektrogeraete Veb K | Procede de traitement superficiel de pieces en materiau isolant par application electrostatique |
EP0114252A1 (de) * | 1982-12-16 | 1984-08-01 | Fulgurit GmbH & Co. Kommanditgesellschaft | Vorrichtung zur elektrostatischen Spritzlackierung |
WO1992022912A1 (en) * | 1991-06-12 | 1992-12-23 | Henkel Corporation | Composition and method for enhancing the surface conductivity of thermoplastic surfaces |
FR2713518A1 (fr) * | 1993-12-14 | 1995-06-16 | Applic Peintures Ste Indle | Procédé pour réaliser par voie électrostatique un revêtement en résine époxy sur des objets en matière plastique. |
DE4417172A1 (de) * | 1994-05-17 | 1995-11-23 | Worwag Lack Farbenfabrik Gmbh | Verfahren zur elektrostatischen Pulverbeschichtung nichtleitender Gegenstände |
Non-Patent Citations (1)
Title |
---|
T.L.ELLIS ET AL.: "SELECTIVE ELECTROSTATIC COATING OF NONCONDUCTIVE SUBSTRATES", IBM TECHNICAL DISCLOSURE BULLETIN., vol. 15, no. 9, February 1973 (1973-02-01), NEW YORK US, pages 2726 - 2727, XP002079692 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005013230A1 (de) * | 2005-03-18 | 2006-09-28 | L. Schulte & Co. Gmbh | Verfahren zur elektrostatischen Pulverbeschichtung von hitzebeständigen Kunststoffteilen sowie Mittel zur Herstellung einer leitfähigen Schicht |
EP1782892A3 (de) * | 2005-11-07 | 2008-05-14 | EISENMANN Anlagenbau GmbH & Co. KG | Vorrichtung und Verfahren zur Oberflächenbehandlung von Werkstücken |
EP1936318A1 (de) | 2006-12-21 | 2008-06-25 | Steyr-Daimler-Puch Spezialfahrzeug GmbH | Verfahren zur Herstellung einer Zusatzpanzerung |
Also Published As
Publication number | Publication date |
---|---|
ATE221419T1 (de) | 2002-08-15 |
EP0963795B1 (de) | 2002-07-31 |
DE59804999D1 (de) | 2002-09-05 |
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