EP1270087B1 - Powder coating installation - Google Patents
Powder coating installation Download PDFInfo
- Publication number
- EP1270087B1 EP1270087B1 EP02013512A EP02013512A EP1270087B1 EP 1270087 B1 EP1270087 B1 EP 1270087B1 EP 02013512 A EP02013512 A EP 02013512A EP 02013512 A EP02013512 A EP 02013512A EP 1270087 B1 EP1270087 B1 EP 1270087B1
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- EP
- European Patent Office
- Prior art keywords
- powder
- paint
- coating
- installation
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 title claims abstract description 47
- 238000000576 coating method Methods 0.000 title claims abstract description 31
- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 title claims description 9
- 239000003973 paint Substances 0.000 claims abstract description 19
- 238000010422 painting Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000003086 colorant Substances 0.000 description 7
- 238000005243 fluidization Methods 0.000 description 3
- 210000000707 wrist Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000000872 buffer Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
- B05B7/1459—Arrangements for supplying particulate material comprising a chamber, inlet and outlet valves upstream and downstream the chamber and means for alternately sucking particulate material into and removing particulate material from the chamber through the valves
-
- 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 powder coating system for the Series coating of workpieces according to the generic term of Claim 1.
- a powder coating system for the Series coating of workpieces according to the generic term of Claim 1.
- Such a device is in document US 5772125A shown.
- the invention has for its object a powder coating system to indicate with a coating machine that the Color change not only with less equipment and time and less space required, but above all reduces the risk of coating errors, which in known Systems due to deposits that are difficult to remove in particular in the line common to the colors becomes.
- the powder coating is conveyed in the system described here from the color changer to the atomizer or other application organ no longer due to the injector technology previously used, but by the spatially of the fixed powder supply system separate, according to the invention to be supplied with Application member movable, for example with a movable Robot conveyor unit with which the powder can also be dosed. Because the moving unit too contain the color changer upstream of the conveyor unit can, the length of the common to the selectable colors Only the hose through the machine to the atomizer or other application organ leading route. Furthermore, a metering pump can be used as the delivery unit, which is a powder feed without the previous tendency to deposit allows. Both have a significant improvement in Painting quality result because the workpieces to be coated such as B. vehicle bodies no longer with foreign paint, Powder agglomerates etc. are contaminated because there are fewer deposits form that peel off during painting could.
- the system shown in Fig. 1 contains a painting robot 1, which is parallel to a rail construction 2, for example vehicle bodies to be coated can be moved to the conveying direction is. This degree of freedom and the associated one Robot parts are usually referred to as a driving axle.
- An atomizer 3 is mounted on the wrist of the robot Design and functions of any known powder coating system can correspond.
- a unit 4 which contains a color changer 5 and a metering pump 6.
- the design of the color changer is arbitrary in itself, but can be useful the device described in DE 10125648 correspond to a connected to the atomizer Contains paint tube that is relative to a motor drive Arrangement of several each connected to an ink supply line Paint connections are movably mounted.
- the dosing pump 6 is explained in more detail with reference to FIG. 3.
- the output of the color changer 5 is over with the atomizer 3 one by the robot 1 and by its wrist until immediately connected to the atomizer opening hose 7.
- Each one selectable color assigned input connections of the Color changer 5, on the other hand, are movable with respective tubes 8 Color reservoirs 9 connected to the fixed Form powder supply system.
- the metering pump 6 allows the over a certain line length Powder extraction by suction without fluidization, so that the powder the color changer 5 without the previously required Air injection to the containers 9 can be supplied.
- the container itself suffices, for example, with the usual shaking and possibly a slight fluidization in order to keep the flow of Ensure powder to the suction opening.
- the invention is not based on the described embodiment with the arrangement of the unit 4 on the driving axle of the robot. Rather, it is advantageously possible at least the dosing pump 6, but also the color changer 5 in or on another movable part of a coating machine to arrange, for example with a robot or in the arm that moves the wrist (in Fig. 2 at 1)
- Fig. 3 shows the principle of a possible embodiment of the in 1 and 2 usable dosing pump 6. It consists essentially from a chamber 11, which is controlled by a valve 12 to a compressed air source, not shown, and another controlled valve 14 to a likewise not shown Vacuum source is connected. The exit of the chamber is over the hose 7 (FIGS. 1 and 2) connected to the atomizer 13, while the powder inlet 15 of the chamber via a valve 16 the output of the color changer is connected.
- the compressed air and vacuum sources serve as a pump drive.
- the promotion and The powder coating is dosed by changing the pressure and vacuum in the chamber, for which purpose an air permeable Membrane is arranged.
- the output is essentially defined by the chamber size.
- Such pumps are known per se (EP-A 1 106 547).
- the dosing pump 6 and their arrangement according to the invention have the advantage that the powder dosage is more precise than with the usual one Dosing with air injection on the stationary storage containers.
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- Spray Control Apparatus (AREA)
- Pretreatment Of Seeds And Plants (AREA)
- Fertilizers (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Die Erfindung betrifft eine Pulverbeschichtungsanlage für die
Serienbeschichtung von Werkstücken gemäß dem Oberbegriff des
Anspruchs 1. Eine solche Vorrichtung wird in Dokument
US 5772125A gezeigt.The invention relates to a powder coating system for the
Series coating of workpieces according to the generic term of
In Beschichtungsanlagen für die Serienbeschichtung von Werkstücken wie z. B. Fahrzeugkarossen mit häufig wechselnden Farben ist während des Lackierbetriebes eine rasche Umstellung von einer Farbe zur anderen erforderlich. Die zu diesem Zweck bei der Nasslackbeschichtung üblichen Farbwechselventilblöcke sind bei der Pulverbeschichtung wegen der Besonderheiten des Pulverlacks nicht verwendbar. Pulverlacke werden bisher üblicherweise mit Hilfe eines nach dem Venturiprinzip arbeitenden Sauginjektors aus einem durch Luft fluidisierten Behälter angesaugt und über Kunststoffschläuche in einem Pulver-Luft-Gemisch zum Zerstäuber gefördert, wobei man geringes Pulvervolumen in einem großen Luftvolumen fördert, um den Druckabfall in den Förderschläuchen zu überwinden, was allerdings zu hohen Fließgeschwindigkeiten und der daraus resultierenden Neigung zu Anlagerungen im Förderschlauch führt. Bei Wahlmöglichkeit zwischen mehreren Farben zur Versorgung eines Zerstäubers wird für jede Farbe ein fluidisierter Behälter benötigt. Der Farbwechsel erfolgte in bekannten Pulverbeschichtungsanlagen (DE 3014114, WO 94/22589) durch Umrüsten der Kabine (EP 0200681). Abgesehen von dem Geräte- und Zeitaufwand ergaben sich hierbei erhebliche Entfernungen vom Zerstäuber mit der Folge u.a. entsprechend großer Farbverluste beim Farbwechsel und schwieriger Anlagerungsprobleme.In coating systems for the serial coating of workpieces such as B. vehicle bodies with frequently changing colors is a quick change from one during the painting operation Color to another required. For this purpose at the Wet paint coating usual color change valve blocks are at the powder coating because of the peculiarities of the powder coating not useable. Powder coatings have so far usually been used With the help of a suction injector working on the Venturi principle sucked out of a container fluidized by air and over Plastic hoses in a powder-air mixture for atomizing promoted, with small powder volume in a large Air volume conveys to the pressure drop in the delivery hoses to overcome, which however leads to high flow rates and the resulting tendency to accumulate in the delivery hose leads. If you can choose between several colors to supply an atomizer, a fluidized one is used for each color Container needed. The color change was done in known Powder coating systems (DE 3014114, WO 94/22589) by converting the cabin (EP 0200681). Apart from the device and time expenditure resulted in considerable distances from the atomizer with the consequence i.a. correspondingly large color losses when changing colors and difficult storage problems.
Es wurden zwar auch schon speziell für Pulverlack geeignete Farbwechsler vorgeschlagen (DE 10125648), die zwischen die jeweils auf Rüttelunterlagen stehenden üblichen Fluidbehälter für das Pulver und eine zu dem Zerstäuber führende, den Farben gemeinsame Leitung geschaltet werden können. Da die Zerstäuber in der hier betrachteten Beschichtungsanlage aber an Maschinenteilen montiert sind, die im Betrieb über relativ große Wegstrecken bewegt werden, wie z. B. ein Lackierroboter längs seiner sog. Mitfahrachse (Verfahrbarkeit parallel zu der Werkstückförderrichtung), muss auch in diesem Fall ein entsprechend langer Verbindungsschlauch zwischen dem Farbwechsler und der Maschine vorhanden sein, was nicht nur wegen der oben erwähnten Probleme nachteilig sein, sondern auch Grenzen aufgrund der begrenzten Leistungsfähigkeit der mit Venturitechnik arbeitenden Pumpen an den Pulverbehältern haben kann. Noch weniger realisierbar wäre es aus praktisch-technischen Gründen, nicht nur den Farbwechsler, sondern auch die großen Fluidbehälter mit je einem Rüttler und ggf. zugehöriger Waage auf einer mit der Maschine bewegbaren Unterlage zu montieren, um die Schlauchlänge zu verkürzen.Although they have also been especially suitable for powder coating Color changer proposed (DE 10125648) between each standard fluid containers for vibrating pads the powder and one leading to the atomizer, common to the colors Line can be switched. Since the atomizers in of the coating system considered here, but on machine parts are mounted, which are in operation over relatively long distances be moved, such as B. a painting robot along it so-called travel axis (movability parallel to the workpiece conveying direction), in this case too, a correspondingly long one Connection hose between the color changer and the machine be present, not only because of the problems mentioned above be disadvantageous, but also limits due to the limited Performance of the pumps working with Venturi technology the powder containers can have. Would be even less feasible it for practical-technical reasons, not just the color changer, but also the large fluid containers with one vibrator each and, if necessary, the associated scales on a machine that can be moved Mount the pad to shorten the hose length.
Neben den langen Förderschläuchen hat die bisher übliche Pulverförderung weitere Nachteile, wie z. B. relativ große Leitungsdurchmesser, die u.a. in Robotern Platzprobleme hervorrufen, wenn mehrere Schläuche benötigt werden. Ferner kommt es wegen der hohen Fließgeschwindigkeiten aufgrund der Reibung und Wärmeentwicklung zu Verschleiß und zu Anhaftungen im Injektor und im Förderschlauch, was häufigen Schlauchwechsel und Austausch der Verschleißteile im Injektor erforderlich macht, vor allem aber auch die Beschichtungsqualität beeinträchtigt, da die Beseitigung der Ablagerungen aufgrund des wärmebedingten Anbackverhaltens des Pulvers sehr schwierig ist. Zu Verschleiß und Anlagerungen kann es auch im Zerstäuber selbst kommen. Ein weiterer Nachteil ist der hohe Luftbedarf für die Pulverförderung.In addition to the long delivery hoses, there is the usual powder delivery other disadvantages, such as B. relatively large cable diameter, among others cause space problems in robots, if several hoses are required. It also comes because of the high flow rates due to the friction and Development of heat to wear and buildup in the injector and in the conveying hose, causing frequent hose changes and exchanges that requires wearing parts in the injector everything also affects the coating quality, because the removal of deposits due to the heat Baking behavior of the powder is very difficult. To wear and deposits can also occur in the atomizer itself. On Another disadvantage is the high air requirement for powder conveyance.
Der Erfindung liegt die Aufgabe zugrunde, eine Pulverbeschichtungsanlage mit einer Beschichtungsmaschine anzugeben, die den Farbwechsel nicht nur mit geringerem Geräte- und Zeitaufwand sowie geringerem Platzbedarf ermöglicht, sondern vor allem auch die Gefahr von Beschichtungsfehlern herabsetzt, die bei bekannten Anlagen durch schwierig zu beseitigende Ablagerungen insbesondere in der den Farben gemeinsamen Leitung hervorgerufen wird.The invention has for its object a powder coating system to indicate with a coating machine that the Color change not only with less equipment and time and less space required, but above all reduces the risk of coating errors, which in known Systems due to deposits that are difficult to remove in particular in the line common to the colors becomes.
Diese Aufgabe wird durch die in den Patentansprüchen gekennzeichnete Pulverbeschichtungsanlage gelöst.This task is characterized by that in the claims Powder coating system solved.
Bei der hier beschriebenen Anlage erfolgt die Pulverlackförderung vom Farbwechsler zu dem Zerstäuber oder sonstigen Applikationsorgan nicht mehr durch die bisher übliche Injektortechnik, sondern durch die räumlich von dem ortsfesten Pulverversorgungssystem getrennte, erfindungsgemäß mit dem zu versorgenden Applikationsorgan mitbewegbare, beispielsweise mit einem verfahrbaren Roboter mitfahrende Fördereinheit, mit der das Pulver auch dosiert werden kann. Da die mitfahrende Baueinheit auch den der Fördereinheit vorgeschalteten Farbwechsler enthalten kann, muss die Länge des den wählbaren Farben gemeinsamen Schlauches nur noch der durch die Maschine zu dem Zerstäuber oder sonstigen Applikationsorgan führenden Strecke entsprechen. Ferner kann als Fördereinheit eine Dosierpumpe verwendet werden, die eine Pulverförderung ohne die bisherige Ablagerungsneigung ermöglicht. Beides hat eine erhebliche Verbesserung der Lackierqualität zur Folge, weil die zu beschichtenden Werkstücke wie z. B. Fahrzeugkarossen nicht mehr durch Fremdfarbe, Pulveragglomerate usw. verunreinigt werden, da sich weniger Anlagerungen bilden, die sich während des Lackierbetriebes ablösen könnten.The powder coating is conveyed in the system described here from the color changer to the atomizer or other application organ no longer due to the injector technology previously used, but by the spatially of the fixed powder supply system separate, according to the invention to be supplied with Application member movable, for example with a movable Robot conveyor unit with which the powder can also be dosed. Because the moving unit too contain the color changer upstream of the conveyor unit can, the length of the common to the selectable colors Only the hose through the machine to the atomizer or other application organ leading route. Furthermore, a metering pump can be used as the delivery unit, which is a powder feed without the previous tendency to deposit allows. Both have a significant improvement in Painting quality result because the workpieces to be coated such as B. vehicle bodies no longer with foreign paint, Powder agglomerates etc. are contaminated because there are fewer deposits form that peel off during painting could.
Weitere Vorteile der Erfindung sind geringer Aufwand für die Pulverfarbversorgung (mit entsprechender Kostenersparnis), geringer Platzbedarf sowie dank kürzerer Schläuche und der Möglichkeit kleinerer Leitungsquerschnitte auch geringere Lackverluste als bisher. Die Anzahl wählbarer Farben kann wesentlich größer sein als bisher. Wegen der kleineren Leitungsquerschnitte ist es ferner problemlos möglich, Farbschläuche innerhalb eines Roboters bis unmittelbar vor den Zerstäuber zu verlegen. Die Montage einer Dosierpumpe oder sonstigen Fördereinheit auf einem mitfahrenden Teil des Roboters, ggf. auch in unmittelbarer Nähe am Zerstäuber, bietet zudem die Möglichkeit einer wesentlichen Verkürzung der Farbwechselzeiten. Durch die schonendere Pulverförderung ergeben sich außerdem längere Standzeiten der Leitungen und sonstigen vom Pulver durchströmten Anlagenteile und damit reduzierter Wartungsaufwand.Further advantages of the invention are little effort for the Powder paint supply (with corresponding cost savings), less Space requirements and thanks to shorter hoses and the possibility smaller cable cross-sections also lower paint losses as before. The number of selectable colors can be significant be bigger than before. Because of the smaller wire cross-sections it is also easily possible to paint hoses inside of a robot up to immediately in front of the atomizer. The installation of a dosing pump or other liquid end a moving part of the robot, possibly also in the immediate vicinity Proximity to the atomizer also offers the possibility of an essential Shortening the color change times. By the gentler Powder delivery also results in longer service lives the lines and other parts of the system through which powder flows and therefore reduced maintenance.
An dem in den Zeichnungen dargestellten Ausführungsbeispiel wird die Erfindung näher erläutert. Es zeigen:
- Fig. 1
- eine Pulverbeschichtungsanlage mit einem Lackierroboter;
- Fig. 2
- eine abgewandelte Ausführungsform der Anlage nach Fig. 1; und
- Fig. 3
- eine schematische Darstellung einer an sich bekannten Dosierpumpe, die vorteilhaft als Fördereinheit in der hier beschriebenen Anlage verwendet werden kann.
- Fig. 1
- a powder coating system with a painting robot;
- Fig. 2
- a modified embodiment of the system of FIG. 1; and
- Fig. 3
- a schematic representation of a known metering pump, which can be used advantageously as a delivery unit in the system described here.
Die in Fig. 1 dargestellte Anlage enthält einen Lackierroboter
1, der auf einer Schienenkonstruktion 2 beispielsweise parallel
zu der Förderrichtung zu beschichtender Fahrzeugkarossen verfahrbar
ist. Dieser Bewegungsfreiheitsgrad und der zugehörige
Roboterteil werden üblicherweise als Mitfahrachse bezeichnet.
Am Handgelenk des Roboters ist ein Zerstäuber 3 montiert, dessen
Bauart und Funktionen beliebigen bekannten Pulverbeschichtungsanlagen
entsprechen können.The system shown in Fig. 1 contains a
Beispielsweise in der Nähe der Schienenkonstruktion 2 ist auf
dem dortigen mitfahrenden Teil des Roboters 1 eine Baueinheit 4
befestigt, die einen Farbwechsler 5 und eine Dosierpumpe 6 enthält.
Die Konstruktion des Farbwechslers ist an sich beliebig,
kann aber zweckmäßig der in der DE 10125648 beschriebenen Vorrichtung
entsprechen, die ein mit dem Zerstäuber verbundenes
Farbrohr enthält, das von einem Motorantrieb relativ zu einer
Anordnung mehrerer jeweils mit einer Farbzuführleitung verbundener
Farbanschlüsse bewegbar gelagert ist. Die Dosierpumpe 6
wird anhand von Fig. 3 näher erläutert.For example, in the vicinity of the
Der Ausgang des Farbwechslers 5 ist mit dem Zerstäuber 3 über
einen durch den Roboter 1 und durch dessen Handgelenk bis unmittelbar
am Zerstäuber mündenden Schlauch 7 verbunden. Die jeweils'einer
wählbaren Farbe zugeordneten Eingangsanschlüsse des
Farbwechslers 5 sind dagegen über bewegbare Schläuche 8 mit jeweiligen
Farbvorratsbehältern 9 verbunden, die das ortsfeste
Pulverversorgungssystem bilden.The output of the
Die Dosierpumpe 6 erlaubt über eine gewisse Leitungslänge die
Pulverentnahme durch Saugwirkung ohne Fluidisierung, so dass
das Pulver dem Farbwechsler 5 ohne die bisher erforderliche
Luftinjektion an den Behältern 9 zugeführt werden kann. Für die
Behälter selbst genügt beispielsweise das übliche Rütteln und
eventuell eine leichte Fluidisierung, um das Nachfließen von
Pulver zu der Absaugöffnung zu gewährleisten.The metering pump 6 allows the over a certain line length
Powder extraction by suction without fluidization, so that
the powder the
Von einem ortsfesten Pulverversorgungssystem zu einem mitfahrenden
Teil des Roboters, also zu der Baueinheit 4 führende
Schläuche müssen so lang sein, dass der Roboter die gewünschte
Mitfahrbewegung ausführen kann. Bei Anordnung des ortsfesten
Versorgungssystems an der Mitte der Verfahrstrecke ist die Mindestlänge
somit die halbe Verfahrstrecke (in praktischen Fällen
beispielsweise etwa 4m). Insbesondere für den Fall, dass die
Schläuche 8 so lang sind, dass das Pulver nicht von der Dosierpumpe
6 aus den Behältern 9 gesaugt werden kann, bestehen auch
andere Möglichkeiten der Pulverförderung zu dem Farbwechsler 5,
beispielsweise durch gesonderte Vakuumförderung oder durch
Druckförderung an den ortsfesten Behältern. From a stationary powder supply system to a moving one
Part of the robot, ie leading to the assembly 4
Hoses must be long enough for the robot to get the one you want
Can carry out a ride. When arranging the stationary
Supply system at the middle of the travel distance is the minimum length
thus half the travel distance (in practical cases
for example about 4m). Especially in the event that the
Bei der abgewandelten Ausführungsform nach Fig. 2 sei angenommen,
dass wegen großer Entfernung der Vorratsbehälter 9 vom Roboter
1 relativ lange Schläuche 8' mit relativ großem Querschnitt
erforderlich sind und der Farbwechsler 5 deshalb durch
die oben erwähnte gesonderte Vakuum- oder Druckförderung versorgt
wird. Insbesondere in diesem Fall wäre es unzweckmäßig,
den Farbwechsler direkt an die Schläuche 8' anzuschließen. Darstellungsgemäß
führen die Schläuche 8' vielmehr in jeweilige
Zwischenbehälter 10 auf dem mitfahrenden Roboterteil, aus denen
der Farbwechsler 5 das Pulver gleichmäßig und genau absaugen
kann. Diese als Puffer dienenden Zwischenbehälter 10 müssen
nicht fluidisiert werden, obwohl eine leichte Fluidisierung zur
Verbesserung der Pulverbeweglichkeit sinnvoll sein kann, und
sie können im Gegensatz zu den ortsfesten Vorratsbehältern 7 so
klein und leicht sein, dass sie problemlos in die Baueinheit 4
oder einen sonstigen Teil des Roboters eingebaut werden können.In the modified embodiment according to FIG. 2, it is assumed
that because of the large distance of the
Die Erfindung ist nicht auf das beschriebene Ausführungsbeispiel
mit der Anordnung der Baueinheit 4 an der Mitfahrachse
des Roboters beschränkt. Vielmehr ist es vorteilhaft möglich,
zumindest die Dosierpumpe 6, aber auch den Farbwechsler 5 in
oder an einem anderen bewegbaren Teil einer Beschichtungsmaschine
anzuordnen, bei einem Roboter beispielsweise auch an
oder in dem das Handgelenk bewegenden Arm.(in Fig 2 bei 1)The invention is not based on the described embodiment
with the arrangement of the unit 4 on the driving axle
of the robot. Rather, it is advantageously possible
at least the dosing pump 6, but also the
Fig. 3 zeigt das Prinzip einer möglichen Ausführungsform der in
Fig. 1 und 2 verwendbaren Dosierpumpe 6. Sie besteht im wesentlichen
aus einer Kammer 11, die über ein gesteuertes Ventil 12
an eine nicht dargestellte Druckluftquelle und über ein weiteres
gesteuertes Ventil 14 an eine ebenfalls nicht dargestellte
Vakuumquelle angeschlossen ist. Der Ausgang der Kammer ist über
den Schlauch 7 (Fig. 1 und 2) mit dem Zerstäuber 13 verbunden,
während der Pulvereingang 15 der Kammer über ein Ventil 16 an
den Ausgang des Farbwechslers angeschlossen ist. Die Druckluft-
und Vakuumquellen dienen als Pumpenantrieb. Die Förderung und
Dosierung des Pulverlacks geschieht über den Wechsel von Druck
und Vakuum in der Kammer, in der zu diesem Zweck eine luftdurchlässige
Membran angeordnet ist. Die Fördermenge ist im wesentlichen
durch die Kammergröße definiert. Derartige Pumpen
sind an sich bekannt (EP-A 1 106 547). Generell hat die Dosierpumpe
6 und ihre erfindungsgemäße Anordnung den Vorteil, dass
die Pulverdosierung genauer ist als bei der bisher üblichen
Dosierung mit Luftinjektion an den ortsfesten Vorratsbehältern.Fig. 3 shows the principle of a possible embodiment of the in
1 and 2 usable dosing pump 6. It consists essentially
from a
Claims (7)
- A powder coating installation for the serial coating of work pieces with coating powder of changing colour including a fixed powder supply system (9) for a plurality of selectable paints, from which a supply conduit arrangement (8) leads to a movable portion (4) of a coating machine (1) carrying a powder applicator (3), and including a paint changer unit (5), which is connected to the powder supply system (9) and from which a conduit (7) common to the paints leads to the applicator (3), characterised in that a conveying unit (6), which conveys the selected coating powder from the paint changer unit (5) to the applicator (3), is arranged on a movable portion (4) of the coating machine (1).
- An installation as claimed in Claim 1, characterised in that the paint changer unit (5), which is connected upstream of the conveying unit (6), is arranged on the movable portion (4) of the machine.
- An installation as claimed in Claim 1 or 2, characterised in that the conveying unit (6) is construction in the form of a metering device.
- An installation as claimed in one of the preceding claims, characterised in that the conveying unit is constituted by a pump (6), which is connected between the paint changer unit (5) and the applicator (3) and for the actuation of which compressed air and vacuum are produced by alternately controlled valves (12, 14).
- An installation as claimed in one of the preceding claims, characterised in that the conveying and paint changer units (5, 6) are connected to a moving portion (4) of a painting robot (1) movable parallel to the conveying path of the work pieces and are connected to the applicator (3) by a conduit (7) which extends at least in part through the robot.
- An installation as claimed in one of the preceding claims, characterised in that the colour changer unit (5) is connected by means of a respective paint hose (8) for each selectable paint directly to a respective supply container (9) of the fixed powder supply system.
- An installation as claimed in one of Claims 1 to 5, characterised in that arranged on a movable portion (4) of the coating machine (1) there is a respective intermediate container (10) for the coating powder for each selectable paint and the paint changer unit (5) is connected between these intermediate containers (10) and the conveying unit (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10130173 | 2001-06-22 | ||
| DE10130173A DE10130173A1 (en) | 2001-06-22 | 2001-06-22 | Powder coating plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1270087A1 EP1270087A1 (en) | 2003-01-02 |
| EP1270087B1 true EP1270087B1 (en) | 2003-11-12 |
Family
ID=7689095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02013512A Expired - Lifetime EP1270087B1 (en) | 2001-06-22 | 2002-06-17 | Powder coating installation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1270087B1 (en) |
| AT (1) | ATE253986T1 (en) |
| DE (2) | DE10130173A1 (en) |
| ES (1) | ES2210207T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712681B2 (en) | 2004-06-03 | 2010-05-11 | Nordson Corporation | Color change for powder coating material application system |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10115472A1 (en) | 2001-03-29 | 2002-10-10 | Duerr Systems Gmbh | Valve unit for use in electrostatic painting apparatus has an optoelectronic sensor device with light wave conductors and an optoelectronic sensor to sense an indexing position and to generate a corresponding sensing signal. |
| DE10115467A1 (en) | 2001-03-29 | 2002-10-02 | Duerr Systems Gmbh | Tool changing system for one machine |
| DE10115463A1 (en) | 2001-03-29 | 2002-10-02 | Duerr Systems Gmbh | Atomizer for a coating system and process for its material supply |
| US7005159B2 (en) * | 2001-04-02 | 2006-02-28 | Abb Inc. | Method of operating powder paint applicator |
| DE10202711A1 (en) | 2002-01-24 | 2003-07-31 | Duerr Systems Gmbh | Sprayer unit for electrostatic serial coating of workpieces comprises an electrode array integrated into the ring section of insulating material on the outer housing of the unit |
| DE10231421A1 (en) | 2002-07-11 | 2004-01-22 | Dürr Systems GmbH | Method and system for supplying a powder coating device |
| DE10233198A1 (en) | 2002-07-22 | 2004-02-05 | Dürr Systems GmbH | rotary atomizers |
| DE10239516A1 (en) | 2002-08-28 | 2004-03-18 | Dürr Systems GmbH | Hose with pig for delivery of electrically conductive fluid paints or varnishes at high voltage comprises an inner layer enclosed in an insulating layer with high voltage resistance |
| DE10239517A1 (en) | 2002-08-28 | 2004-03-11 | Dürr Systems GmbH | Coating device with a rotary atomizer and method for controlling its operation |
| DE10240451A1 (en) | 2002-09-02 | 2004-03-11 | Dürr Systems GmbH | Sensor arrangement for a coating system |
| DE10245594A1 (en) | 2002-09-30 | 2004-04-08 | Dürr Systems GmbH | Collision detection method |
| US6991178B2 (en) | 2003-01-24 | 2006-01-31 | Dürr Systems, Inc. | Concentric paint atomizer shaping air rings |
| KR101258552B1 (en) * | 2005-04-13 | 2013-05-02 | 일리노이즈 툴 워크스 인코포레이티드 | spray coating applicator system |
| US8671495B2 (en) | 2006-11-06 | 2014-03-18 | Durr Systems, Inc. | Scraper pig |
| DE102007040898A1 (en) | 2007-08-24 | 2009-10-01 | Dürr Systems GmbH | Method for introducing aid material into flow path of crude gas flow, involves detecting whether there is sufficient crude gas flow through filter element, where introduction of aid material is carried out into flow path of crude gas flow |
| DE102007040153A1 (en) | 2007-08-24 | 2009-02-26 | Dürr Systems GmbH | Method and apparatus for separating overspray of a liquid coating material |
| DE102007040154A1 (en) | 2007-08-24 | 2009-05-07 | Dürr Systems GmbH | Process for supplying a coating system with a particulate auxiliary material |
| DE102007040896B4 (en) | 2007-08-24 | 2023-02-16 | Dürr Systems Ag | Device for separating wet paint overspray, installation for painting objects, method for producing a device for separating wet paint overspray and method for converting an existing device for separating wet paint overspray |
| DE102007040901A1 (en) | 2007-08-24 | 2009-02-26 | Dürr Systems GmbH | Filter apparatus and method for separating wet paint overspray |
| CA2747285C (en) | 2008-12-19 | 2014-02-18 | Durr Systems Gmbh | Paint shop and method of operating a paint shop |
| DE102010009069A1 (en) | 2010-02-23 | 2011-08-25 | Wurster, Gerd, 70191 | Device for color powder coating of object, has powder squirting horizontal bar comprising area that is connected with after filter by bypassing cyclone arrangement, where arrangement is arranged downstream of after filter |
| DE102012016354A1 (en) * | 2012-08-16 | 2014-03-13 | Eisenmann Ag | Carrying device and robot with such a support device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2677900B1 (en) * | 1991-06-24 | 1993-10-08 | Sames Sa | INSTALLATION FOR ELECTROSTATIC SPRAYING OF POWDER COATING PRODUCT. |
| FR2703266B1 (en) * | 1993-04-01 | 1995-06-23 | Sames Sa | Coating product spraying machine. |
| JP3245040B2 (en) * | 1996-02-29 | 2002-01-07 | トリニティ工業株式会社 | Electrostatic coating machine |
| JPH1119553A (en) * | 1997-07-01 | 1999-01-26 | Honda Motor Co Ltd | Multicolor coating device |
-
2001
- 2001-06-22 DE DE10130173A patent/DE10130173A1/en not_active Withdrawn
-
2002
- 2002-06-17 DE DE50200103T patent/DE50200103D1/en not_active Expired - Lifetime
- 2002-06-17 ES ES02013512T patent/ES2210207T3/en not_active Expired - Lifetime
- 2002-06-17 AT AT02013512T patent/ATE253986T1/en not_active IP Right Cessation
- 2002-06-17 EP EP02013512A patent/EP1270087B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712681B2 (en) | 2004-06-03 | 2010-05-11 | Nordson Corporation | Color change for powder coating material application system |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE253986T1 (en) | 2003-11-15 |
| DE10130173A1 (en) | 2003-01-02 |
| EP1270087A1 (en) | 2003-01-02 |
| DE50200103D1 (en) | 2003-12-18 |
| ES2210207T3 (en) | 2004-07-01 |
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