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EP1245294A2 - Sprayer for a coating installation and process for feeding coating material to the sprayer - Google Patents

Sprayer for a coating installation and process for feeding coating material to the sprayer Download PDF

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Publication number
EP1245294A2
EP1245294A2 EP02006091A EP02006091A EP1245294A2 EP 1245294 A2 EP1245294 A2 EP 1245294A2 EP 02006091 A EP02006091 A EP 02006091A EP 02006091 A EP02006091 A EP 02006091A EP 1245294 A2 EP1245294 A2 EP 1245294A2
Authority
EP
European Patent Office
Prior art keywords
atomizer
coating material
metering pump
storage device
coating
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
Application number
EP02006091A
Other languages
German (de)
French (fr)
Other versions
EP1245294A3 (en
EP1245294B1 (en
Inventor
Stefano Giuliano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
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Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP1245294A2 publication Critical patent/EP1245294A2/en
Publication of EP1245294A3 publication Critical patent/EP1245294A3/en
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Publication of EP1245294B1 publication Critical patent/EP1245294B1/en
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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
    • 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
    • B05B12/1481—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 comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air

Definitions

  • the invention relates to an atomizer and a method for Material supply of an atomizer for a coating machine according to the preamble of the independent claims.
  • the atomizer is in particular an as The whole thing can be replaced on a painting robot or another Coating machines, for example, installed electrostatic Rotary or air atomizer for series coating of workpieces such as vehicle bodies.
  • Such atomizers enable, inter alia, advantageous color change concepts and simple electrical isolation between with direct charging of the coating material working electrostatic Atomizing organs and for safety reasons grounded paint supply system because the reservoir at the coating is separated from the grounded supply system are and for changing colors easily and automatically without or can also be replaced with the actual atomizer.
  • Known atomizers of this type contain mechanically from a spindle drive operated dosing cylinder (DE 196 10 588 A).
  • dosing cylinders have that due to their design limited space requirement. In particular, their length, because of the piston rod is about twice the piston stroke, affects especially with painting robots or other Handling devices the accessibility of workpiece areas such as vehicle interiors. They are too even atomizers with hydraulically driven metering cylinders known (EP 0 967 016 A), but the pressure fluid from a dosing pump located outside the atomizer must become.
  • the invention has for its object a constructive to specify simple, reliable and not too heavy atomizers, its storage facility without hydraulic metering gets along and allows small space requirements, as well as a corresponding Process for supplying material to the atomizer.
  • the invention is not only suitable, but in particular for electrostatic atomizers that are interchangeable as a whole Painting robots or other coating machines installed be and in doing so both the required Isolation from the grounded supply system of the coating system as well as quick and easy color changes without significant loss of color and detergent allow any number of selectable colors.
  • electrostatic atomizers that are interchangeable as a whole Paint robots or other coating machines installed be and in doing so both the required Isolation from the grounded supply system of the coating system as well as quick and easy color changes without significant loss of color and detergent allow any number of selectable colors.
  • complex No hoses are used in the machine can, since the atomizer’s internal storage device dismantled atomizer can be filled.
  • the preferred installation of a gear pump, for example trained dosing pump in the atomizer has the advantage that this conventional, long-established and reliable component a dosing cylinder of the known type is unnecessary.
  • the formation of the ink reservoir as a hose winding has the advantage that on the one hand because of the comparison with usual cylindrical paint containers significant reduction correspondingly lower color change losses due to the diameter color and detergent and on the other hand the constructive Flexibility especially with regard to saving space is significantly improved.
  • hose winding or spiral pipe preferably pigged is to the coating material via the metering pump to the Promote atomizer and if necessary residual paint back in Direction to the grounded supply system of the coating system to press results in a very simple one Possibility of cleaning the inner tube wall of the storage device through the newt in a manner known per se.
  • the largely cylindrical main part of the housing 3 contains one, for example, coaxially in the middle of the housing arranged dosing pump DP, for example a gear pump also in a manner and function known per se.
  • the Dosing pump DP is connected to the valve block 22 (FIG. 2) Atomizer 4 connected and reversible so that it can promote in the two opposite directions.
  • the (Not shown) drive of the dosing pump DP is appropriate mechanically executed, e.g.
  • Hose winding 10 A special feature of the serving as a storage container Hose winding 10 is the piggability.
  • the one in the paint tube FM the hose winding 10 located pig 12 can by compressed air from the mentioned compressed air connection through the entire hose winding are pushed around the inside Coating material to the dosing pump DP too to press.
  • Suitable pigs for this purpose are known per se.
  • the atomizer designated ZA in Fig. 2 contains the between the dosing pump DPA and here as a rotating bell shown atomizer connected valve block 22 with the usual main needle valve HNA for that from the pump DPA fed atomizer and a branching paint supply valve V1A. From which the dosing pump DPA on its opposite Line connecting the FMA paint hose a flushing and return line branches via a valve V2A from. At the end facing away from the DPA pump is the Paint hose FMA to a compressed air line with a compressed air valve V3A connected.
  • the filling station 20 contains one with the atomizer side Change system WZA interchangeable change system WWS, too a drive motor that can be mechanically coupled to the dosing pump DPA M heard.
  • Station 20 also includes a coupled atomizer connected to valve V2A flush valve assembly SV with a flushing valve S10, a pulse air valve PL10 and a feedback valve RF10 as well as a color changer FW with color valves connected to valve V1A F1-F4, detergent and pulse air valves S or PL and one Return valve RF.
  • the color changer FW becomes that selected coating material through the valve V1A and the Dosing pump DPA in the end facing the piggable Color hose FMA pressed to fill it, the Pig 12A towards the opposite hose end is pushed.
  • atomizer ZA While the atomizer ZA is being filled, one can be connected to the Robot hand axis 1 (Fig. 1) coupled other atomizer For example, be coated as shown in Fig. 3, where the Fig. 2 corresponding elements are designated with B instead of A.
  • the atomizer-side exchange system WZB is with the robot-side Exchange system WR coupled together. Via the valve V3B the piggable paint hose FMB is pressurized with compressed air, so that the coating material stored in the hose from the pig 12B to the dosing pump DPB and is promoted by this to the atomizer. This results in an atomizer exchange with color change the next cycle.
  • the atomizer Eg is on the robot.
  • the two halves of the changing system WZB and WR and also the drive for the dosing pump DPB are engaged.
  • the valves V1B and V2B are closed.
  • the valve V3B releases compressed air, causing the pig 12B is driven.
  • the newt in turn presses when it moves in the FMB paint hose between valves V3B and V2B the first color for the dosing pump DPB, the one with the set one Paint speed metered the color, whereby it from the motor M is driven in the robot.
  • the newt separates the paint of the compressed air serving as the pig driving medium and ensures at the same time for cleaning the paint hose walls.
  • the main needle valve HNB the colored paint flows to the atomizing element.
  • the atomizer ZB works under high voltage.
  • the pig 12A is near the valve when valve V3A is open V2A. After the flushing process is completed, the valves F2, V1A, V2A and RF10 opened, making the second color in the Color channel arrives.
  • the dosing pump DPA runs backwards at the pressing speed.
  • the delivery volume of the metering pump is the specified time V2A closed, so that any remaining in the paint hose Flushing medium is displaced and the system is vented.
  • the valve V2A is closed, the pig from the Paint column against the pressure of the compressed air to its other end position pushed near the valve V3A. After reaching the desired amount of paint using the dosing pump is the Pressing process ended. All the valves mentioned go back in their basic position.
  • the atomizer ZA is now for the next one The painting process is prepared and remains in station 20 to to the next atomizer change.
  • the invention is also not based on the examples described limited.
  • the one serving as a storage container Hose winding or spiral pipe even without a downstream one Dosing pump to save space may be advantageous.
  • the one in the atomizer between the ink reservoir and the atomizing device switched dosing pump for any differently shaped containers may be appropriate.

Landscapes

  • Spray Control Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The sputter unit (Z), e.g. for electrostatic paint spraying by a robot, has a dosing pump (DP) between the sputter head (4) and the paint supply (FM) held in a coil (10). The paint is forced out of the coil by a pig (12), under pressure from compressed air on one side to force the paint towards the pump for spraying. The pump is operated by an external motor through a flexible drive shaft in or at a robot hand joint (1).

Description

Die Erfindung betrifft einen Zerstäuber und ein Verfahren zur Materialversorgung eines Zerstäubers für eine Beschichtungsmaschine gemäß dem Oberbegriff der unabhängigen Patentansprüche. Bei dem Zerstäuber handelt es sich insbesondere um einen als Ganzes auswechselbar an einem Lackierroboter oder einer sonstigen Beschichtungsmaschine montierten beispielsweise elektrostatischen Rotations- oder Luftzerstäuber für die Serienbeschichtung von Werkstücken wie beispielsweise Fahrzeugkarossen.The invention relates to an atomizer and a method for Material supply of an atomizer for a coating machine according to the preamble of the independent claims. The atomizer is in particular an as The whole thing can be replaced on a painting robot or another Coating machines, for example, installed electrostatic Rotary or air atomizer for series coating of workpieces such as vehicle bodies.

Derartige Zerstäuber ermöglichen u.a. vorteilhafte Farbwechselkonzepte und einfache Potentialtrennung zwischen mit Direktaufladung des Beschichtungsmaterials arbeitenden elektrostatischen Zerstäubungsorganen und dem aus Sicherheitsgründen geerdeten Farbversorgungssystem, da die Vorratsbehälter bei der Beschichtung von dem geerdeten Versorgungssystem getrennt sind und zum Farbwechsel einfach und automatisch ohne oder auch mit dem eigentlichen Zerstäuber ausgewechselt werden können. Bekannte Zerstäuber dieser Art enthalten mechanisch von einem Spindelantrieb betätigte Dosierzylinder (DE 196 10 588 A). Solche Dosierzylinder haben aber den durch ihre Bauform bedingten großen Platzbedarf. Insbesondere ihre Länge, die wegen der Kolbenstange etwa doppelt so groß ist wie der Kolbenhub, beeinträchtigt vor allem bei Lackierrobotern oder sonstigen Handhabungsgeräten die Erreichbarkeit von Werkstückbereichen wie beispielweise Fahrzeuginnenräumen. Es sind zwar auch schon Zerstäuber mit hydraulisch angetriebenen Dosierzylindern bekannt (EP 0 967 016 A), deren Druckflüssigkeit aber von einer außerhalb des Zerstäubers befindlichen Dosierpumpe zugeführt werden muß. Such atomizers enable, inter alia, advantageous color change concepts and simple electrical isolation between with direct charging of the coating material working electrostatic Atomizing organs and for safety reasons grounded paint supply system because the reservoir at the coating is separated from the grounded supply system are and for changing colors easily and automatically without or can also be replaced with the actual atomizer. Known atomizers of this type contain mechanically from a spindle drive operated dosing cylinder (DE 196 10 588 A). Such dosing cylinders have that due to their design limited space requirement. In particular, their length, because of the piston rod is about twice the piston stroke, affects especially with painting robots or other Handling devices the accessibility of workpiece areas such as vehicle interiors. They are too even atomizers with hydraulically driven metering cylinders known (EP 0 967 016 A), but the pressure fluid from a dosing pump located outside the atomizer must become.

Darüber hinaus ergeben sich bei Dosierzylindern generelle Probleme wie u.a. hohe Anforderungen an Abstützung und Lagerung zur Gewährleistung der gewünschten Dosiergenauigkeit und Dynamik, die nicht nur den Konstruktionsaufwand erhöhen, sondern auch das beispielsweise vom Handgelenk eines Roboters zu tragende Gewicht des Zerstäubers.In addition, there are general dispensing cylinders Problems such as high requirements for support and storage to ensure the desired dosing accuracy and Dynamics that not only increase the design effort, but also also from the wrist of a robot, for example carrying weight of the atomizer.

Der Erfindung liegt die Aufgabe zugrunde, einen konstruktiv einfachen, zuverlässigen und nicht zu schweren Zerstäuber anzugeben, dessen Vorratseinrichtung ohne hydraulische Dosierung auskommt und geringen Platzbedarf ermöglicht, sowie ein dementsprechendes Verfahren zur Materialversorgung des Zerstäubers.The invention has for its object a constructive to specify simple, reliable and not too heavy atomizers, its storage facility without hydraulic metering gets along and allows small space requirements, as well as a corresponding Process for supplying material to the atomizer.

Diese Aufgabe wird durch die Merkmale der Patentansprüche gelöst.This object is solved by the features of the claims.

Die Erfindung eignet sich nicht nur, aber insbesondere für elektrostatische Zerstäuber, die als Ganzes auswechselbar an Lackierrobotern oder sonstigen Beschichtungsmaschinen montiert werden und hierbei auf einfache Weise sowohl die erforderliche Potentialtrennung von dem geerdeten Versorgungssystem der Beschichtungsanlage als auch schnellen und problemlosen Farbwechsel ohne wesentliche Verluste an Farbe und Spülmittel bei beliebiger Anzahl wählbarer Farben ermöglichen. Beispielsweise im Fall von Lackierrobotern ist auch von Vorteil, daß auf aufwendige Verschlauchungen in der Maschine verzichtet werden kann, da die interne Vorratseinrichtung des Zerstäubers bei abmontiertem Zerstäuber befüllt werden kann.The invention is not only suitable, but in particular for electrostatic atomizers that are interchangeable as a whole Painting robots or other coating machines installed be and in doing so both the required Isolation from the grounded supply system of the coating system as well as quick and easy color changes without significant loss of color and detergent allow any number of selectable colors. For example in the case of painting robots, it is also advantageous that complex No hoses are used in the machine can, since the atomizer’s internal storage device dismantled atomizer can be filled.

Der bevorzugte Einbau einer beispielsweise als Zahnradpumpe ausgebildeten Dosierpumpe in den Zerstäuber hat den Vorteil, daß sich durch dieses konventionelle, seit langem bewährte und zuverlässige Bauteil ein Dosierzylinder der bekannten Art erübrigt. The preferred installation of a gear pump, for example trained dosing pump in the atomizer has the advantage that this conventional, long-established and reliable component a dosing cylinder of the known type is unnecessary.

Die Ausbildung des Farbvorratsbehälters als Schlauchwicklung hat den Vorteil, daß einerseits wegen der im Vergleich mit üblichen zylindrischen Farbbehältern erheblichen Verringerung des Durchmessers entsprechend geringere Farbewechselverluste an Farbe und Spülmittel auftreten und andererseits die konstruktive Flexibilität vor allem im Hinblick auf Platzeinsparung entscheidend verbessert wird. Ähnliches gilt für die ebenfalls mögliche Verwendung einer mehr oder weniger starren Rohrspirale als Farbvorratsbehälter.The formation of the ink reservoir as a hose winding has the advantage that on the one hand because of the comparison with usual cylindrical paint containers significant reduction correspondingly lower color change losses due to the diameter color and detergent and on the other hand the constructive Flexibility especially with regard to saving space is significantly improved. The same applies to the also possible use of a more or less rigid Pipe spiral as a paint reservoir.

Da die Schlauchwicklung bzw. Rohrspirale vorzugsweise gemolcht wird, um das Beschichtungsmaterial über die Dosierpumpe zu dem Zerstäubungsorgan zu fördern und ggf. Restfarbe zurück in Richtung zu dem geerdeten Versorgungssystem der Beschichtungsanlage zu drücken, ergibt sich zugleich eine sehr einfache Möglichkeit der Reinigung der Schlauchinnenwand der Vorratseinrichtung durch den Molch in an sich bekannter Weise.Since the hose winding or spiral pipe preferably pigged is to the coating material via the metering pump to the Promote atomizer and if necessary residual paint back in Direction to the grounded supply system of the coating system to press results in a very simple one Possibility of cleaning the inner tube wall of the storage device through the newt in a manner known per se.

An dem in der Zeichnung dargestellten Ausführungsbeispiel wird die Erfindung näher erläutert. Es zeigen:

Fig. 1
einen am Handgelenk eines Lackierroboters montierten Luftzerstäuber;
Fig. 2 und 3
schematische Darstellungen des Farbversorgungskonzepts für einen Zerstäuber der hier beschriebenen Art; und
Fig 4
eine allgemeinere Darstellung des Zerstäubers.
The invention is explained in more detail using the exemplary embodiment shown in the drawing. Show it:
Fig. 1
an air atomizer mounted on the wrist of a painting robot;
2 and 3
schematic representations of the paint supply concept for an atomizer of the type described here; and
Fig. 4
a more general representation of the atomizer.

Gemäß Fig. 1 ist an dem Handgelenk 1 eines Roboters ein Zerstäuber, Z montiert, in dessen Gehäuse 3 im vorderen Bereich ein Luftzerstäubungsorgan 4 angeordnet ist, dessen Aufbau und Funktionsweise an sich bekannt sind und daher keiner Beschreibung bedürfen. Der weitgehend zylindrische Hauptteil des Gehäuses 3 enthält eine beispielsweise koaxial in der Gehäusemitte angeordnete Dosierpumpe DP, beispielsweise eine Zahnradpumpe ebenfalls an sich bekannter Art und Funktionsweise. Die Dosierpumpe DP ist über einen Ventilblock 22 (Fig. 2) an das Zerstäubungsorgan 4 angeschlossen und umsteuerbar, so daß sie in den beiden entgegengesetzten Richtungen fördern kann. Der (nicht dargestellte) Antrieb der Dosierpumpe DP ist zweckmäßig mechanisch ausgeführt, z.B. mit einer biegsamen Welle, die ihrerseits über Kegelräder und ein Ritzelgetriebe an der Roboterhandachse angetrieben werden kann (durch Verdoppeln der üblicherweise als "Achse 6" bezeichneten Roboterachse). Eine andere Möglichkeit ist der Direktantrieb der Dosierpumpe DP durch einen in dem Zerstäuber befindlichen Elektromotor.1 is on the wrist 1 of a robot Atomizer, Z mounted, in its housing 3 in the front area an air atomizing element 4 is arranged, its structure and Functionality are known per se and therefore no description require. The largely cylindrical main part of the housing 3 contains one, for example, coaxially in the middle of the housing arranged dosing pump DP, for example a gear pump also in a manner and function known per se. The Dosing pump DP is connected to the valve block 22 (FIG. 2) Atomizer 4 connected and reversible so that it can promote in the two opposite directions. The (Not shown) drive of the dosing pump DP is appropriate mechanically executed, e.g. with a flexible shaft, which in turn via bevel gears and a pinion gear on the robot hand axis can be driven (by double the usual referred to as "axis 6" robot axis). A another possibility is the direct drive of the dosing pump DP by an electric motor located in the atomizer.

In dem die Dosierpumpe DP umgebenden, im wesentlichen ringförmigen Raum 8 im zylindrischen Teil des Gehäuses 3 ist eine Farbschlauchwicklung 10 der dargestellten, beispielweise doppellagigen Spiralform angeordnet, die als Vorratsbehälter für das Beschichtungsmaterial dient. Das eine Schlauchende ist an die dem Zerstäubungsorgan 4 abgewandte Seite der Dosierpumpe DP angeschlossen, während das andere Schlauchende mit einem externen Druckluftanschluß (V3A in Fig. 2) in Verbindung steht.In the substantially ring-shaped surrounding the dosing pump DP Space 8 in the cylindrical part of the housing 3 is one Color hose winding 10 of the illustrated, for example double-layered Spiral shape arranged as a storage container for the coating material is used. One end of the hose is on the side of the metering pump facing away from the atomizing element 4 DP connected while the other end of the hose with one external compressed air connection (V3A in Fig. 2) in connection stands.

Ein besonderes Merkmal der als Vorratsbehälter dienenden Schlauchwicklung 10 ist die Molchbarkeit. Der in dem Farbschlauch FM der Schlauchwicklung 10 befindliche Molch 12 kann durch Druckluft von dem erwähnten Druckluftanschluß durch die gesamte Schlauchwicklung geschoben werden, um das darin befindliche Beschichtungsmaterial zu der Dosierpumpe DP zu drücken. Hierfür geeignete Molche sind an sich bekannt.A special feature of the serving as a storage container Hose winding 10 is the piggability. The one in the paint tube FM the hose winding 10 located pig 12 can by compressed air from the mentioned compressed air connection through the entire hose winding are pushed around the inside Coating material to the dosing pump DP too to press. Suitable pigs for this purpose are known per se.

Bei der folgenden Erläuterung der Betriebsweise sei angenommen, daß der Zerstäuber Z am Flansch 14 lösbar am Roboterhandgelenk 1 montiert ist und zum Befüllen der Schlauchwicklung 10 mit Beschichtungsmaterial abgenommen und an die in Fig. 2 dargestellte, auch als Zerstäuberwechsel- und Spülstation dienende Befüllstation 20 angeschlossen wird.In the following explanation of the mode of operation it is assumed that the atomizer Z on the flange 14 releasably on the robot wrist 1 is mounted and for filling the hose winding 10 removed with coating material and connected to the one shown in FIG. also serving as an atomizer changing and rinsing station Filling station 20 is connected.

Der in Fig. 2 mit ZA bezeichnete Zerstäuber enthält den zwischen die Dosierpumpe DPA und das hier als Rotationsglocke dargestellte Zerstäubungsorgan geschalteten Ventilblock 22 mit dem üblichen Hauptnadelventil HNA für das von der Pumpe DPA gespeiste Zerstäubungsorgan und einem abzweigenden Farbversorgungsventil V1A. Von der die Dosierpumpe DPA auf ihrer entgegengesetzten Seite mit dem Farbschlauch FMA verbindenden Leitung zweigt über ein Ventil V2A eine Spül- und Rückführungsleitung ab. An dem der Pumpe DPA abgewandten Ende ist der Farbschlauch FMA an eine Druckluftleitung mit einem Druckluftventil V3A angeschlossen.The atomizer designated ZA in Fig. 2 contains the between the dosing pump DPA and here as a rotating bell shown atomizer connected valve block 22 with the usual main needle valve HNA for that from the pump DPA fed atomizer and a branching paint supply valve V1A. From which the dosing pump DPA on its opposite Line connecting the FMA paint hose a flushing and return line branches via a valve V2A from. At the end facing away from the DPA pump is the Paint hose FMA to a compressed air line with a compressed air valve V3A connected.

Die Befüllstation 20 enthält ein mit dem zerstäuberseitigen Wechselsystem WZA zusammenkuppelbares Wechselsystem WWS, zu dem ein mechanisch mit der Dosierpumpe DPA kuppelbarer Antriebsmotor M gehört. Ferner enthält die Station 20 eine bei angekuppeltem Zerstäuber mit dem Ventil V2A verbundene Spülventilanordnung SV mit einem Spülmittelventil S10, einem Pulsluftventil PL10 und einem Rückführungsventil RF10 sowie einen mit dem Ventil V1A verbundenen Farbwechsler FW mit Farbventilen F1-F4, Spülmittel- und Pulsluftventilen S bzw. PL und einem Rückführungsventil RF. Aus dem Farbwechsler FW wird das gewählte Beschichtungsmaterial durch das Ventil V1A und die Dosierpumpe DPA in das ihr zugewandte Ende des molchbaren Farbschlauches FMA gedrückt, um diesen zu befüllen, wobei der Molch 12A in Richtung zu dem entgegengesetzten Schlauchende geschoben wird.The filling station 20 contains one with the atomizer side Change system WZA interchangeable change system WWS, too a drive motor that can be mechanically coupled to the dosing pump DPA M heard. Station 20 also includes a coupled atomizer connected to valve V2A flush valve assembly SV with a flushing valve S10, a pulse air valve PL10 and a feedback valve RF10 as well as a color changer FW with color valves connected to valve V1A F1-F4, detergent and pulse air valves S or PL and one Return valve RF. The color changer FW becomes that selected coating material through the valve V1A and the Dosing pump DPA in the end facing the piggable Color hose FMA pressed to fill it, the Pig 12A towards the opposite hose end is pushed.

Während der Zerstäuber ZA befüllt wird, kann mit einem an die Roboterhandachse 1 (Fig. 1) angekoppelten anderen Zerstäuber ZB beschichtet werden, wie in Fig. 3 gezeigt ist, wo die Fig. 2 entsprechenden Elementen mit B statt A bezeichnet sind. Das zerstäuberseitige Wechselsystem WZB ist mit dem roboterseitigen Wechselsystem WR zusammengekuppelt. Über das Ventil V3B wird der molchbare Farbschlauch FMB mit Druckluft beaufschlagt, so daß das in dem Schlauch gespeicherte Beschichtungsmaterial von dem Molch 12B zu der Dosierpumpe DPB gedrückt und von dieser zu dem Zerstäubungsorgan gefördert wird. Bei einem Zerstäubertausch mit Farbwechsel ergibt sich somit der folgende Zyklus.While the atomizer ZA is being filled, one can be connected to the Robot hand axis 1 (Fig. 1) coupled other atomizer For example, be coated as shown in Fig. 3, where the Fig. 2 corresponding elements are designated with B instead of A. The atomizer-side exchange system WZB is with the robot-side Exchange system WR coupled together. Via the valve V3B the piggable paint hose FMB is pressurized with compressed air, so that the coating material stored in the hose from the pig 12B to the dosing pump DPB and is promoted by this to the atomizer. This results in an atomizer exchange with color change the next cycle.

Lackieren mit Zerstäuber ZB und erster Farbe: Der Zerstäuber ZB befindet sich am Roboter. Die beiden Hälften des Wechselsystems WZB und WR und auch der Antrieb für die Dosierpumpe DPB sind eingekuppelt. Die Ventile V1B und V2B sind geschlossen. Das Ventil V3B gibt Druckluft frei, wodurch der Molch 12B angetrieben wird. Der Molch drückt seinerseits bei seiner Bewegung im Farbschlauch FMB zwischen den Ventilen V3B und V2B die erste Farbe zur Dosierpumpe DPB, die mit der eingestellten Lackierdrehzahl die Farbe dosiert, wobei sie von dem Motor M im Roboter angetrieben wird. Der Molch trennt hierbei den Lack von der als Molchtreibmedium dienenden Druckluft und sorgt gleichzeitig für die Reinigung der Farbschlauchwände. Bei geöffnetem Hauptnadelventil HNB strömt der Farblack zu dem Zerstäubungsorgan. Der Zerstäuber ZB arbeitet unter Hochspannung.Painting with atomizer ZB and first color: the atomizer Eg is on the robot. The two halves of the changing system WZB and WR and also the drive for the dosing pump DPB are engaged. The valves V1B and V2B are closed. The valve V3B releases compressed air, causing the pig 12B is driven. The newt in turn presses when it moves in the FMB paint hose between valves V3B and V2B the first color for the dosing pump DPB, the one with the set one Paint speed metered the color, whereby it from the motor M is driven in the robot. The newt separates the paint of the compressed air serving as the pig driving medium and ensures at the same time for cleaning the paint hose walls. When open The main needle valve HNB, the colored paint flows to the atomizing element. The atomizer ZB works under high voltage.

Start eines Farbwechselprogramms in der Zerstäuberwechsel-, Spül- und Befüllstation 20: Bei einem anstehenden Farbwechsel wird durch die Anlagensteuerung ein automatisches Spül- und Andrückprogramm gestartet. Während des Versprühens der ersten Farbe durch den Zerstäuber ZB wird der andere Zerstäuber ZA, der sich in der Zerstäuberwechsel- und Spülstation 20 befindet, für die nächste Lackieraufgabe vorbereitet. Hier sind die beiden Hälften des Wechselsystems WZA und WWS eingekuppelt. Alle Ventile der Station 20 befinden sich in ihrer Grundstellung.Start of a color change program in the atomizer change, Rinsing and filling station 20: When there is an upcoming color change is an automatic rinsing and Pressing program started. While spraying the first Color from the atomizer ZB becomes the other atomizer ZA, which is located in the atomizer changing and rinsing station 20, prepared for the next painting job. Here are the both halves of the interchangeable system WZA and WWS. All valves of station 20 are in their basic position.

Spülen des Zerstäubers ZA: Beim anschließenden Spülvorgang befindet sich der Molch 12A im Farbschlauch FMA nahe vor dem Ventil V2A, da angenommen wird, daß er beim letzten Lackiervorgang die gesamte im Farbschlauch befindliche Farbe ausgedrückt hat (eventuell mit Ausnahme eines Sicherheitsvolumens). Das Ventil V3A ist geöffnet, so daß der Molch mit Druckluft beaufschlagt ist. Nun öffnet das Ventil V2A, wodurch das durch wechselseitiges Öffnen der Ventile V10 und PL10 am Steuerventil SV entstehende Spülmittel-Luft-Gemisch über die mit Spüldrehzahl laufende Dosierpumpe DPA und durch das geöffnete Ventil HNA strömt. Dadurch wird der Zerstäuber ZA vom Ventil V2A über die Dosierpumpe DPA gespült. (Beim Spülen ist der Druck der den Molch über das Ventil V3A beaufschlagenden Druckluft größer als der Druck des Spülmittel-Luft-Gemisches.) Die Dosierpumpe DPA wird von dem Motor M in der Station 20 angetrieben. Kurzzeitig wird dann bei geschlossenem Ventil HNA über das Ventil V1A bei geöffnetem Ventil RF der Farbwechsler FW gespült. Zum Abschluß des Spülvorgangs kann das gesamte System mit einem kurzen Pulsluftintervall trockengeblasen werden.Rinsing the atomizer ZA: during the subsequent rinsing process the newt 12A in the FMA paint hose close to the Valve V2A, since it is assumed that it was the last painting process the entire color in the paint tube is expressed has (possibly with the exception of a security volume). The valve V3A is open, so that the pig with compressed air is acted upon. Now the valve V2A opens, which means that mutual opening of valves V10 and PL10 on the control valve SV resulting detergent-air mixture over the rinsing speed running dosing pump DPA and through the opened valve HNA flows. Thereby the atomizer ZA from the valve V2A rinsed via the dosing pump DPA. (When flushing is the pressure the compressed air acting on the pig via valve V3A greater than the pressure of the detergent-air mixture.) The dosing pump DPA is driven by motor M in station 20. HNA then briefly turns over when the valve is closed valve V1A with valve RF open and color changer FW rinsed. The entire system can be used to complete the rinsing process be blown dry with a short pulse air interval.

Andrücken der zweiten Farbe im Zerstäuber ZA: Der Molch 12A befindet sich bei geöffnetem Ventil V3A in der Nähe des Ventils V2A. Nach beendetem Spülvorgang werden die Ventile F2, V1A, V2A und RF10 geöffnet, wodurch die zweite Farbe in den Farbkanal gelangt. Die Dosierpumpe DPA läuft rückwärts mit Andrückdrehzahl. Nach einer vom Steuerprogramm entsprechend dem Fördervolumen der Dosierpumpe vorgegebenen Zeit wird das Ventil V2A geschlossen, so daß eventuell im Farbschlauch verbliebenes Spülmedium verdrängt und das System entlüftet wird. Nachdem das Ventil V2A geschlossen ist, wird der Molch von der Lacksäule gegen den Druck der Druckluft zu seiner anderen Endposition in der Nähe des Ventils V3A geschoben. Nach Erreichen der gewünschten Farbmenge mit Hilfe der Dosierpumpe ist der Andrückvorgang beendet. Alle erwähnten Ventile gehen wieder in ihre Grundstellung. Der Zerstäuber ZA ist nun für den nächsten Lackiervorgang vorbereitet und verharrt in der Station 20 bis zum nächsten Zerstäuberwechsel. Press on the second color in the atomizer ZA: The pig 12A is near the valve when valve V3A is open V2A. After the flushing process is completed, the valves F2, V1A, V2A and RF10 opened, making the second color in the Color channel arrives. The dosing pump DPA runs backwards at the pressing speed. According to one of the control programs according to the The delivery volume of the metering pump is the specified time V2A closed, so that any remaining in the paint hose Flushing medium is displaced and the system is vented. After the valve V2A is closed, the pig from the Paint column against the pressure of the compressed air to its other end position pushed near the valve V3A. After reaching the desired amount of paint using the dosing pump is the Pressing process ended. All the valves mentioned go back in their basic position. The atomizer ZA is now for the next one The painting process is prepared and remains in station 20 to to the next atomizer change.

Start des Zerstäuberwechselprogramms und Wechsel vom Zerstäuber ZB zum Zerstäuber ZA: Nach Beendigung des Lackiervorgangs mit dem Zerstäuber ZB werden die Dosierpumpe DPB gestoppt, das Ventil HNB geschlossen und anschließend die Hochspannung heruntergefahren. Nun kann der Zerstäuber ZB gegen den Zerstäuber ZA ausgewechselt und beispielsweise ein nächstes Werkstück mit der zweiten Farbe lackiert werden.Start the atomizer change program and change the atomizer Eg to the atomizer ZA: after finishing the painting process with the atomizer ZB the dosing pump DPB is stopped Valve HNB closed and then shut down the high voltage. Now the atomizer can eg against the atomizer ZA replaced and, for example, a next workpiece be painted with the second color.

Die beschriebene Betriebsweise ist nur ein Beispiel. Das in Fig.4 allgemeiner dargestellte erfindungsgemässe Zerstäubersystem mit dem Anschlussflansch 16, der molchbaren Leitungsspirale 10, der beispielsweise nur in Richtung zum Zerstäubungsorgan 4 fördernden Pumpe P und der dazwischengeschalteten Ventileinheit 22' kann auf beliebige sonstige Weise betrieben werden.The described mode of operation is only an example. This in 4 generally represented atomizer system according to the invention with the connecting flange 16, the piggable spiral pipe 10, for example, only towards Atomizer 4 pump P and the intermediate valve unit 22 'can be set to any otherwise operated.

Die Erfindung ist auch nicht auf die beschriebenen Beispiele beschränkt. Insbesondere kann die als Vorratsbehälter dienende Schlauchwicklung oder Rohrspirale auch ohne nachgeschaltete Dosierpumpe zur Platzeinsparung vorteilhaft sein. Andererseits kann eine im Zerstäuber zwischen den Farbvorratsbehälter und das Zerstäubungsorgan geschaltete Dosierpumpe auch für beliebige andersartig geformte Behälter zweckmäßig sein.The invention is also not based on the examples described limited. In particular, the one serving as a storage container Hose winding or spiral pipe even without a downstream one Dosing pump to save space may be advantageous. on the other hand can one in the atomizer between the ink reservoir and the atomizing device switched dosing pump for any differently shaped containers may be appropriate.

In dem hier beschriebenen Zerstäuber kann sich u.a. auch die übliche, für die elektrostatische Beschichtung erforderliche Hochspannungskaskade befinden.In the atomizer described here, also the usual high-voltage cascade required for electrostatic coating are located.

Claims (15)

Zerstäuber für eine Beschichtungsmaschine, der insbesondere auswechselbar an einem bewegbaren Maschinenteil (1) montiert oder montierbar ist und in seinem Gehäuse (3) eine als Vorratsbehälter für das Beschichtungsmaterial dienende, mit dem Zerstäubungsorgan (4) verbundene Vorratseinrichtung (FM) enthält,
und dem das Beschichtungsmaterial von einer Dosiereinrichtung (DP) zuführbar ist,
dadurch gekennzeichnet, daß sich in dem Zerstäubergehäuse (3) eine Dosierpumpe (DP) befindet, die zwischen die Vorratseinrichtung (FM) und das Zerstäubungsorgan (4) geschaltet ist.Atomizer for a coating machine, which is in particular interchangeably mounted or mountable on a movable machine part (1) and contains in its housing (3) a storage device (FM) serving as a storage container for the coating material and connected to the atomizing element (4),
and to which the coating material can be fed by a metering device (DP),
characterized in that in the atomizer housing (3) there is a metering pump (DP) which is connected between the supply device (FM) and the atomizing element (4). Zerstäuber für eine Beschichtungsmaschine, der insbesondere auswechselbar an einem bewegbaren Maschinenteil (1) montiert oder montierbar ist und in seinem Gehäuse (3) eine als Vorratsbehälter für das Beschichtungsmaterial dienende, mit dem Zerstäubungsorgan (4) verbundene Vorratseinrichtung (FM) enthält,
und dem das Beschichtungsmaterial von einer Dosiereinrichtung (DP) zuführbar ist, insbesondere nach Anspruch 1,
dadurch gekennzeichnet, daß die Vorratseinrichtung durch eine spiralförmige Schlauchwicklung (10) oder eine Rohrspirale gebildet ist.Atomizer for a coating machine, which is in particular interchangeably mounted or mountable on a movable machine part (1) and contains in its housing (3) a storage device (FM) serving as a storage container for the coating material and connected to the atomizing element (4),
and to which the coating material can be supplied by a metering device (DP), in particular according to claim 1,
characterized in that the storage device is formed by a spiral hose winding (10) or a tube spiral. Zerstäuber nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Dosierpumpe (DP) räumlich innerhalb der Schlauchwicklung (10) oder Rohrspirale angeordnet ist. Atomizer according to claims 1 and 2, characterized in that the metering pump (DP) is arranged spatially within the hose winding (10) or tube spiral. Zerstäuber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß als Dosierpumpe (DP) eine Zahnradpumpe vorgesehen ist.Atomizer according to one of the preceding claims, characterized in that a gear pump is provided as the metering pump (DP). Zerstäuber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Dosierpumpe so umsteuerbar ist, daß sie in zueinander entgegengesetzten Richtungen fördern kann.Atomizer according to one of the preceding claims, characterized in that the metering pump can be reversed so that it can deliver in opposite directions. Zerstäuber nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß ein durch die Schlauchwicklung (10) oder Rohrspirale bewegbarer Molch (12) vorgesehen ist, der das Beschichtungsmaterial aus dem Schlauch (FM) oder Rohr in Richtung zu dem Zerstäubungsorgan (4) herausschiebt und zu diesem Zweck auf seiner dem Beschichtungsmaterial abgewandten Seite von einem Druckmedium beaufschlagt wird.Atomizer according to one of claims 2 to 5, characterized in that a pig (12) which is movable through the hose winding (10) or tube spiral is provided and pushes the coating material out of the tube (FM) or tube in the direction of the atomizing element (4) and for this purpose a pressure medium is applied on its side facing away from the coating material. Zerstäuber nach Anspruch 6, dadurch gekennzeichnet, daß der Molch (12) durch Druckluft angetrieben wird.Atomizer according to claim 6, characterized in that the pig (12) is driven by compressed air. Zerstäuber nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Schlauchwicklung (10) oder Rohrspirale an ihrem Materialauslaßende außerhalb des Schlauches (FM) oder Rohres an das externe Materialversorgungssystem (FW) des Zerstäubers angeschlossen oder anschließbar ist.Atomizer according to claim 6 or 7, characterized in that the hose winding (10) or tube spiral at its material outlet end outside the tube (FM) or tube is connected or connectable to the external material supply system (FW) of the atomizer. Zerstäuber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die umsteuerbare Dosierpumpe (DP) in der einen Richtung das Beschichtungsmaterial aus der Vorratseinrichtung (FM) zu dem Zerstäubungsorgan (4) fördert, während sie in der entgegengesetzten Förderrichtung zwischen ihr und dem Zerstäubungsorgan zugeführtes Beschichtungsmaterial in die Vorratseinrichtung (FM) fördert. Atomizer according to one of the preceding claims, characterized in that the reversible metering pump (DP) conveys the coating material from the storage device (FM) to the atomizing element (4) in one direction, while it supplies coating material supplied between it and the atomizing element in the opposite conveying direction in the storage facility (FM). Zerstäuber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Dosierpumpe (DP) über eine flexiblen Welle mit einem außerhalb des Zerstäubers angeordneten Motor (M) kuppelbar ist.Atomizer according to one of the preceding claims, characterized in that the metering pump (DP) can be coupled via a flexible shaft to a motor (M) arranged outside the atomizer. Zerstäuber nach Anspruch 10 an einem Lackierroboter, dadurch gekennzeichnet, daß die flexible Welle von einem in oder an dem Roboterhandgelenk (1), an dem der Zerstäuber montiert ist, angeordneten Zahnradgetriebe angetrieben wird.Atomizer according to claim 10 on a painting robot, characterized in that the flexible shaft is driven by a gear mechanism arranged in or on the robot wrist (1) on which the atomizer is mounted. Zerstäuber nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Dosierpumpe (DP) von einem in dem Zerstäuber befindlichen Elektromotor angetrieben wird.Atomizer according to one of claims 1 to 9, characterized in that the metering pump (DP) is driven by an electric motor located in the atomizer. Verfahren zur Materialversorgung eines Zerstäubers nach Anspruch 1, dadurch gekennzeichnet, daß zum Befüllen der Vorratseinrichtung (FM) das Beschichtungsmaterial in die Verbindung zwischen der Vorratseinrichtung (FM) und der Dosierpumpe (DP) oder in die Verbindung zwischen der Dosierpumpe (DP) und dem Zerstäubungsorgan geleitet wird, und daß bei der Beschichtung das Beschichtungsmaterial durch Druckluft aus der Vorratseinrichtung (FM) in die Dosierpumpe (DP) gedrückt wird, die es zu dem Zerstäubungsorgan (4) fördert.Method for supplying material to an atomizer according to claim 1, characterized in that for filling the storage device (FM) the coating material in the connection between the storage device (FM) and the metering pump (DP) or in the connection between the metering pump (DP) and the atomizing member is passed, and that during the coating the coating material is pressed by compressed air from the storage device (FM) into the metering pump (DP), which conveys it to the atomizing element (4). Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass das Beschichtungsmaterial zum Befüllen von der Dosierpumpe (DP) in die Vorratseinrichtung (FM) gedrückt wird.Method according to claim 13, characterized in that the coating material for filling is pressed by the metering pump (DP) into the storage device (FM). Verfahren nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass das Beschichtungsmaterial von einem Molch (12) durch eine die Vorratseinrichtung (FM) bildende Leitung gedrückt wird.A method according to claim 12 or 13, characterized in that the coating material is pressed by a pig (12) through a line forming the storage device (FM).
EP02006091A 2001-03-29 2002-03-18 Sprayer for a coating installation and process for feeding coating material to the sprayer Expired - Lifetime EP1245294B1 (en)

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DE10115463A1 (en) 2002-10-02
US7051950B2 (en) 2006-05-30
ATE392956T1 (en) 2008-05-15
US20050230503A1 (en) 2005-10-20
EP1245294A3 (en) 2005-07-13
EP1245294B1 (en) 2008-04-23
US20040124292A1 (en) 2004-07-01
DE50212127D1 (en) 2008-06-05
ES2304405T3 (en) 2008-10-16

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