EP0870547A2 - Lackieranlage und Verfahren zum Betreiben einer Lackieranlage - Google Patents
Lackieranlage und Verfahren zum Betreiben einer Lackieranlage Download PDFInfo
- Publication number
- EP0870547A2 EP0870547A2 EP98106332A EP98106332A EP0870547A2 EP 0870547 A2 EP0870547 A2 EP 0870547A2 EP 98106332 A EP98106332 A EP 98106332A EP 98106332 A EP98106332 A EP 98106332A EP 0870547 A2 EP0870547 A2 EP 0870547A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate reservoir
- paint
- pressure
- painting
- supply
- 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
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
- B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
-
- 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
Definitions
- the invention relates to a method for operating a Painting system for electrostatic painting, in which the Paint by a high voltage Operating part of the system electrostatically charged and then applied to a grounded paint.
- the invention further relates to a painting system according to the Preamble of claim 7.
- the varnish electrostatically charged and the one to be painted Item is grounded.
- the Paint droplets on the surface of the paint to be painted Object steered.
- the losses are only about 10% of the material used.
- the main area of application is the painting of motor vehicle bodies, for example with water-based paints. Several layers of material are in plotted in the manner described above, about one Water filler layer and several top layers.
- the paint particles are charged to about -90 kV usually in that the operational part of the Painting system, in particular a conveyor of the Paint material and an atomizer, as well as a Supply containers are put under high voltage. At the The paint is conveyed in the operational part of the system the paint is charged electrically.
- the part of the system on the supply side is replaced by one Reservoir over a ring line a certain Paint batch a supply container in the company Part of the system supplied.
- the part on the supply side and the Operational parts are then galvanically or electrically isolated, and then it becomes the operational part, as described above Brought high tension.
- the electrostatic in this way charged paint is then hydraulic using a operated stamp from the supply container via a Line promoted to the atomizer and there in the form of the finest electrostatically charged droplets and sprayed on the applied object to be painted.
- the storage container is open so that during the Filling as well as during the galvanic isolation of the Operating side from the supply side the solvent of the Vapors evaporated.
- a conveyor in Form of the aforementioned hydraulically driven Stamp regarded as disadvantageous and expensive.
- DE 40 13 939 A1 describes a painting installation for electrostatic painting with a pressure vessel trained intermediate reservoir, which when switched off High voltage from the part on the supply side can.
- a compressed air line to the intermediate reservoir connected, through which a controllable in the container Pressure is generated, which as the delivery pressure in the Paint shop is used.
- the above the paint in the compressed air standing intermediate serves as electrical insulation.
- the intermediate reservoir is therefore as Link between the supply side and the operational side Part of the system and not entirely on the operational side arranged.
- This task is accomplished by a procedure of the type mentioned solved that is characterized in that the paint from a gaseous part of the system Medium-containing intermediate reservoir in the operating side Part of the system is supplied, which is not vented is so that the gaseous medium is compressed and thereby a delivery pressure is built up and that the paint through the delivery pressure thus formed after the electrical separation from the operational part and the inventory part to the grounded paint is applied.
- the gas admission pressure is at least 0.5 bar, preferably at least 1 bar.
- gaseous medium also preferably from above and the varnish from below into it Intermediate reservoir initiated.
- the operational part or the intermediate reservoir can also contain lacquer blown out under pressure gaseous medium and then with a solvent and / or Mixture of a solvent and pressurized gaseous medium can be flushed.
- the invention further relates to a painting system type mentioned at the outset, which is used to carry out the inventive method so designed is that part of the supply side and the operational side a coupling device fluidly and electrically are interconnectable and separable, and that the intermediate reservoir in the operational part is provided and in the grounded state of the operational part via the coupling device from part on the supply side can be filled with lacquer in such a way that by compressing the gaseous contained therein Medium builds up a delivery pressure that is used to apply the Lacks can be used.
- the intermediate reservoir is preferably designed such that the paint can be filled in without gas inclusion.
- the intermediate reservoir is therefore preferably smooth-walled on the inside and free of undercuts and therefore streamlined educated. It has proven beneficial if that Intermediate reservoir conical, in particular double conical is trained. It is particularly advantageous here if the intermediate reservoir one in a lower floor area has opening paint supply opening, since that In this case, the intermediate reservoir should be completely emptied can.
- the paint supply opening is preferably a assigned umbrella-like inflow element, which prevents the paint from uncontrolled throughout The interior of the intermediate reservoir is injected.
- the Intermediate reservoir is supposed to be from bottom to top rising paint levels are filled without swirling.
- FIG. 1 shows the basic structure of a painting system according to the invention.
- a supply connection that is always grounded Part 1 and an operational part 10, which is optional can be grounded and put under high voltage.
- ring lines 2, 3 circulate paint color or a solvent.
- the lines 4 and 5 are used Paint color or the solvent into one Coupling device 6 with two coupling elements 7, 7 ' transported.
- the coupling element 7 is a indicated control device 9 movable. Of the Coupling element 7 also leads a line 8 to a Disposal or reprocessing device away.
- the other coupling element 7 ' is the operational part 10 assigned. If the part 1 on the supply side with the Part 10 on the operating side via the coupling device 6 to be connected, the operational part 10 be grounded. In electrostatic or galvanic decoupled state must be between the coupling elements 7 and 7 'an insulation distance of at least from experience 300 mm exist before the operational part 10 under High voltage is set.
- the paint-carrying line 12 opens out in a T-shape in a line 16, which is used as a pressure vessel Intermediate reservoir 18 formed with an atomizer 20 connects.
- a further shut-off valve 24 is provided in a section 22 between the Intermediate reservoir 18 and the mouth of the line 12 .
- the Intermediate reservoir 18 is thus leading over the paint Line 12 and section 22 of line 16 with paint fillable, the line section 22 in one Bottom section 26 of the intermediate reservoir 18 opens out.
- the Area of the bottom portion 26 is inside the An inflow element 27 is provided between intermediate reservoirs 18, which the incoming paint to the bottom of the Intermediate reservoirs 18 conducts.
- a shut-off valve 32nd is provided in an upper section 28 of the intermediate reservoir 18 in which a shut-off valve 32nd is provided.
- Compressed air line 34 which is also a shut-off valve 36 has, so that in the upper section 28 of the Intermediate reservoirs 18 a combined solvent and Compressed air connection is formed.
- a pressure measuring device 38 is also provided.
- the first step is via Line 34 and the valve 36 a gas inlet pressure of about 1 bar in the intermediate reservoir 18 designed as a pressure vessel created. Thereafter, the valve 36 is closed (the Shut-off valve 32 is also closed).
- the Coupling device 6 is now used to fill the Intermediate reservoirs 18 activated, i.e. about the Control device 9, the coupling elements 7, 7 ' moved together coupled so that a Flow communication between the paint leading Lines 4 and 12 and the solvent leading Lines 5 and 30 is made.
- the operational side Part 10 of the paint shop is meanwhile grounded.
- that contained in the intermediate reservoir 18 Air volume through the applied paint compresses and forms in the upper part of the Intermediate reservoirs 18 from a compressed air cushion 40.
- This Compressed air cushion also forms the delivery pressure for the Transport of the paint in the direction of the atomizer 20.
- the valve 14 in the Ink supply line 12 closed and it will be one so far not yet mentioned volumetric metering device 42 in Taken into operation by a Zahnradpqmpe formed and in a section 44 of the line 16 between the mouth of the line 12 and the Atomizer 20 is provided.
- This volumetric Dosing device 42 is connected to the one in the intermediate reservoir 18 prevailing pressure as a form. On the The form is only used to ensure that the paint from the intermediate reservoir 18 to the metering device 42 and thus reaches the atomizer 20 in a predetermined amount.
- Figure 2 shows a painting system according to the invention for five Colors, with the color shown in Figure 1 for each color and the configuration described above is provided, i.e. five are provided as pressure vessels 18a to 18e Intermediate reservoirs as well as a pressure vessel Solvent reservoir 18f provided over the solvent-carrying line 30 and a valve arrangement 31 corresponding to the remaining intermediate reservoirs 18a to 18e can be filled or emptied. That of Figure 1 corresponding components have the same reference numbers with the addition of the respective letters a to f designated.
- the from the respective intermediate reservoirs 18a to 18f leading lines 22a to 22f lead to one Color changer 60.
- the color changer 60 also opens Compressed air connection 62. Between the color changer 60 and the The volumetric metering device 42 is atomizer 20 arranged.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
- Figur 1
- eine schematische Darstellung einer erfindungsgemäßen Lackieranlage;
- Figur 2
- eine schematische Darstellung einer erfindungsgemäßen Lackieranlage für fünf Farben.
Claims (18)
- Verfahren zum Betreiben einer Lackieranlage zum elektrostatischen Lackieren, bei dem der Lack durch einen unter Hochspannung stehenden betriebsseitigen Teil (10) der Anlage elektrostatisch aufgeladen und dann auf ein geerdetes Lackiergut aufgebracht wird, dadurch gekennzeichnet, dass der Lack von einem vorratsseitigen Teil (1) der Anlage einem ein gasförmiges Medium enthaltenden Zwischenreservoir (18) im betriebsseitigen Teil (10) der Anlage zugeführt wird, das dabei nicht entlüftet wird, so dass das gasförmige Medium komprimiert und dabei ein Förderdruck aufgebaut wird, und dass der Lack durch den so gebildeten Förderdruck nach der elektrischen Trennung von betriebsseitigem Teil (10) und vorratsseitigem Teil (1) auf das geerdete Lackiergut aufgebracht wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Zwischenreservoir (18) vor dem erstmaligen Befüllen auf einen Gas-Vordruck gebracht wird, der so bemessen ist, dass er einen Druckverlust zwischen dem Zwischenreservoir (18) und einem Zerstäuber (20) ausgleicht.
- Verfahren nach Anspruch 2, da'urch gekennzeichnet, dass der Gas-Vordruck wenigstens 0,5 bar, vorzugsweise wenigstens 1 bar, beträgt.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Lackiervorgang unterbrochen wird, wenn der Druck im Inneren des Zwischenreservoirs (18) unter einen vorbestimmten Wert, insbesondere unter den Gas-Vordruck sinkt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das gasförmige Medium von oben in das Zwischenreservoir (18) eingeleitet wird.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Lack von unten in das Zwischenreservoir (18) eingeleitet wird.
- Lackieranlage zum Durchführen des Verfahrens nach einem der vorstehenden Ansprüche, mit einem vorratsseitigen Teil (1) und einem betriebsseitigen Teil (10), wobei der vorratsseitige Teil (1) geerdet ist und der betriebsseitige Teil (10) abwechselnd geerdet und unter Hochspannung gesetzt werden kann, und mit einem als Druckbehälter ausgebildeten Zwischenreservoir, dadurch gekennzeichnet, dass vorratsseitiger und betriebsseitiger Teil (1, 10) über eine Kopplungseinrichtung (6) strömungsmäßig sowie elektrisch leitend miteinander verbindbar und voneinander trennbar sind, und dass das Zwischenreservoir im betriebsseitigen Teil vorgesehen ist und im geerdeten Zustand des betriebsseitigen Teils (10) über die Kopplungseinrichtung (6) vom vorratsseitigen Teil (1) derart mit Lack befüllbar ist, dass sich durch Komprimieren des darin enthaltenen gasförmigen Mediums ein Förderdruck aufbaut, der zum Auftragen des Lacks verwendbar ist.
- Anlage nach Anspruch 7, dadurch gekennzeichnet, dass das Zwischenreservoir (18) so ausgebildet ist, dass der Lack gaseinschlussfrei einfüllbar ist.
- Anlage nach Anspruch 8, dadurch gekennzeichnet, dass das Zwischenreservoir (18) eine in einem unteren Bodenbereich (26) mündende Lackzuführöffnung aufweist.
- Anlage nach Anspruch 9, dadurch gekennzeichnet, dass im Bereich der Lackzuführöffnung ein Anströmelement (27) vorgesehen ist.
- Anlage nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass das Zwischenreservoir (18) einen Belüftungsanschluss (34) zum Anlegen eines Gas-Vordrucks und/oder zum Belüften aufweist.
- Anlage nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass das Zwischenreservoir (18) einen Lösungsmittelanschluss (30) aufweist.
- Anlage nach Anspruch 11 und 12, dadurch gekennzeichnet, dass der Belüftungsanschluss (34) zugleich den Lösungsmittelanschluss (30) bildet und über eine Steueranordnung (32, 36) wahlweise mit Druckluft oder mit Lösungsmittel beaufschlagbar ist.
- Anlage nach einem der Ansprüche 7 bis 13, gekennzeichnet durch eine Drucküberwachungseinrichtung (38) zur Druckmessung im Inneren des Zwischenreservoirs (18).
- Anlage nach Anspruch 14, gekennzeichnet durch eine mit der Drucküberwachungseinrichtung (38) zusammenwirkende Abschalteinrichtung zum Unterbrechen des Lackiervorgangs wenn der im Inneren des Zwischenreservoirs (18) herrschende Druck einen vorbestimmten oder vorbestimmbaren Wert unterschreitet.
- Anlage nach einem der Ansprüche 7 bis 15, dadurch gekennzeichnet, dass das Zwischenreservoir (18) so dimensioniert ist, dass er zumindest die für einen Lackiervorgang benötigte Lackmenge aufnimmt.
- Anlage nach einem der Ansprüche 7 bis 16, dadurch gekennzeichnet, dass zwischen dem Zwischenreservoir (18) und einem Zerstäuber (20) eine volumetrische Dosiereinrichtung (42) vorgesehen ist.
- Anlage nach einem der Ansprüche 7 bis 17, dadurch gekennzeichnet, dass das Zwischenreservoir (18) für Reinigungs- oder Kontrollzwecke zugänglich ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19715294A DE19715294C1 (de) | 1997-04-11 | 1997-04-11 | Lackieranlage und Verfahren zum Betreiben einer Lackieranlage |
DE19715294 | 1997-04-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0870547A2 true EP0870547A2 (de) | 1998-10-14 |
EP0870547A3 EP0870547A3 (de) | 1999-12-29 |
EP0870547B1 EP0870547B1 (de) | 2008-05-21 |
Family
ID=7826325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98106332A Expired - Lifetime EP0870547B1 (de) | 1997-04-11 | 1998-04-07 | Lackieranlage und Verfahren zum Betreiben einer Lackieranlage |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0870547B1 (de) |
DE (1) | DE19715294C1 (de) |
ES (1) | ES2306464T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107790318A (zh) * | 2017-12-08 | 2018-03-13 | 山东大学 | 一种渐变涂层的双路送粉热喷涂装置及工作方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4013939A1 (de) | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | Beschichtungsanlage zum serienweisen beschichten von werkstuecken mit elektrisch leitfaehigem beschichtungsmaterial |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4313475B1 (en) * | 1980-06-26 | 1994-07-12 | Nordson Corp | Voltage block system for electrostatic coating with conductive materials |
DE4013940A1 (de) * | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | Verfahren und anlage zum serienweisen beschichten von werkstuecken mit leitfaehigem beschichtungsmaterial |
-
1997
- 1997-04-11 DE DE19715294A patent/DE19715294C1/de not_active Expired - Lifetime
-
1998
- 1998-04-07 ES ES98106332T patent/ES2306464T3/es not_active Expired - Lifetime
- 1998-04-07 EP EP98106332A patent/EP0870547B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4013939A1 (de) | 1990-04-30 | 1991-10-31 | Behr Industrieanlagen | Beschichtungsanlage zum serienweisen beschichten von werkstuecken mit elektrisch leitfaehigem beschichtungsmaterial |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107790318A (zh) * | 2017-12-08 | 2018-03-13 | 山东大学 | 一种渐变涂层的双路送粉热喷涂装置及工作方法 |
CN107790318B (zh) * | 2017-12-08 | 2023-09-08 | 山东大学 | 一种渐变涂层的双路送粉热喷涂装置及工作方法 |
Also Published As
Publication number | Publication date |
---|---|
ES2306464T3 (es) | 2008-11-01 |
EP0870547A3 (de) | 1999-12-29 |
DE19715294C1 (de) | 1998-10-01 |
EP0870547B1 (de) | 2008-05-21 |
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