EP1348487B1 - Coating installation with an atomizer and a dosage pump - Google Patents

Coating installation with an atomizer and a dosage pump Download PDF

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Publication number
EP1348487B1
EP1348487B1 EP03006080A EP03006080A EP1348487B1 EP 1348487 B1 EP1348487 B1 EP 1348487B1 EP 03006080 A EP03006080 A EP 03006080A EP 03006080 A EP03006080 A EP 03006080A EP 1348487 B1 EP1348487 B1 EP 1348487B1
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EP
European Patent Office
Prior art keywords
piston
coating
pump
coating installation
installation
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EP03006080A
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German (de)
French (fr)
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EP1348487A1 (en
Inventor
Stefano Giuliano
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Duerr Systems AG
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Duerr Systems AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/148—Pistons, piston-rods or piston-rod connections the piston being provided with channels which are coacting with the cylinder and are used as a distribution member for another piston-cylinder unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports

Definitions

  • the invention relates to a coating system according to the preamble of claim 1.
  • it is a Plant with electrostatic rotary atomizers or air atomizers for the serial coating of workpieces such as Car bodies with frequently changing colors.
  • the invention relates to a nebulizer for such Plant containing a dosing pump.
  • the dosage is also known with color quantity control loops, which are essentially from an electronic universal regulator as a control element, a serving as an actuator color pressure regulator and a flow measuring device exist for actual value detection and the as a shut-off Serving main needle valve of the usual atomizer upstream (Dürr / Behr Technical Handbook 02/1994 "Color flow control”; DE 101 42 355).
  • the invention is based on the object, a coating system or a nebulizer with a very accurate dosing pump which is smaller and lighter, a much smaller one Dead space volume has smaller and in the case of a color change Color, detergent and time losses caused than previously in coating systems known and customary dosing.
  • valveless piston metering pump selected according to the invention is in Principle known per se for many decades (DE 509 222), wherein for generating the superimposed translation and Rotational movements u.a. various joint and crank gears were used (DE 35 20 233, DE 196 19 675, DE 37 11 107, DE 198 25 769).
  • Metering pumps in the invention preferred Embodiment as a so-called wobble piston pump with to change of the stroke volume adjustable inclination angle between the Axes of the drive shaft and the piston are commercially available.
  • the invention is based on the knowledge that these special pump in coating equipment and atomizers of here considered species has numerous previously unrecognized advantages.
  • valveless pump when installing the valveless pump in a nebulizer it also has the advantage of being much smaller, easier and easier than in coating systems so far used metering pumps and also with relatively low Torque, so operated with small and light drive motors can be. Accordingly small and compact can the Atomizers are built, resulting in coating machines and especially in robots advantageous in terms of dynamic Mobility and in terms of accessibility closer Workpiece areas and of workpiece inner areas is.
  • the pump is also suitable for dosing two-component paints (2K) with exactly maintainable mixing ratio in 2K mixing units that are much smaller and lighter than so far and thereby open new placement opportunities. by virtue of of the possible high pressure, the pump is suitable e.g. Well for 2K water clearcoat.
  • Another advantage is the possibility to easily use the Switching direction of the metering pump, as in paint supply systems Of coating equipment is often required.
  • the piston pump 1 shown schematically in Fig. 1 consists in the main thing from one in a cylinder bore 2 along its Axially displaceable cylindrical piston 3 and a through the Arrow at 4 indicated drive motor which moves the piston and at the same time it turns. Transverse into the cylinder bore 2 lead each other coaxially opposed holes, as Inlet opening 8 and outlet opening 10 are used.
  • Both the piston 3 and the bore 2 containing cylinder can be extremely precise, preferably made of ceramic become.
  • the piston pump can be directly or via a detachable coupling of a continuously rotating drive shaft are driven.
  • the drive shaft is pivotally mounted, so that their axis with the piston axis to change the flow rate adjustable angle forms. Except by changing the Speed of the drive motor 4 can therefore also the flow rate by changing the inclination of the pump head and the associated Change the stroke of the piston 3 in the cylinder bore 2 are adjusted.
  • a transmission which is a translational drive movement superimposed on a rotational movement.
  • a transmission For example, one of the known joint or Crank constructions can be used, but can for the invention expedient also a cam mechanism between the rotating Shaft of the drive motor and the piston to be switched.
  • the mathematical Function which defines the defined translatory Describes movement of the piston in the cylinder can be freely programmable, for example when using a known as Radiax engine radial-axial servo motor.
  • the transmission of the generated defined movements to the piston may be appropriate via a magnetic coupling or other fixed or releasable coupling done. Furthermore, between the Piston and its drive motor a flexible or rigid intermediate shaft be arranged.
  • Two or more piston metering pumps may also be considered here Art be provided, the at least one atomizer or when installed in a nebulizer, the outlet opening for the coating material forming paint nozzle in parallel or can be connected in series, the piston movements also controlled by different mathematical functions could be.
  • parallel connected metering pumps for the mixture of two-component coating materials be used.
  • FIG. 2 shows the metering pump according to FIG. 1 with additional features the invention.
  • the piston pump 1 'with additional Terminals 21 and 22, through which e.g. on liquid or possibly also gaseous cleaning medium for backwashing of the pump head through the rear, against the pumping chamber 9 sealed and therefore depressurized cylinder chamber 25 passed can be.
  • a sealing element 24 sit.
  • the connections 21, 22 can also be used to introduce and discharge a liquid serve, with the example optically the seal of the piston 3 can be monitored.
  • a paint compatible transparent liquid such as "mesanol” is used which discolor with seal leaks, e.g. in one transparent conduit part at the outlet port 22 visually observed and / or for the automatic generation of an alarm signal can be visually evaluated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Reciprocating Pumps (AREA)
  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The pump (1) has a rotary motor (4) with a drive system (5) giving the piston (3) a simultaneous rotary and reciprocating motion. The piston has a cut-away end (6) so that the inlet port (8) is uncovered as the piston moves back and the outlet port (10) is uncovered as the piston moves forward. The inlet and outlet ports are in line and at right-angles to the axis of the cylinder (2).

Description

Die Erfindung betrifft eine Beschichtungsanlage gemäß dem Oberbegriff des Anspruchs 1. Insbesondere handelt es sich um eine Anlage mit elektrostatischen Rotationszerstäubern oder Luftzerstäubern für die Serienbeschichtung von Werkstücken wie beispielsweise Fahrzeugkarossen mit häufig wechselnden Farben. Ferner betrifft die Erfindung einen Zerstäuber für eine derartige Anlage, der eine Dosierpumpe enthält.The invention relates to a coating system according to the preamble of claim 1. In particular, it is a Plant with electrostatic rotary atomizers or air atomizers for the serial coating of workpieces such as Car bodies with frequently changing colors. Further The invention relates to a nebulizer for such Plant containing a dosing pump.

In den derzeit üblichen Beschichtungsanlagen sind die an Robotern oder sonstigen programmgesteuert bewegbaren Maschinen ggf. wechselbar montierten Zerstäuber mit den erforderlichen Farbwechsel- und Dosiersystemen der Anlage durch externe Schlauchleitungen verbunden. Zur Farbdosierung werden volumetrisch arbeitende Zahnraddosierpumpen oder Kolbendosiereinrichtungen (Dosierzylinder) verwendet, die in neueren Systemen gemolchten Farbleitungen vor- oder nachgeschaltet sind WO 86 06794, DE 100 33 987, DE 101 57 966, DE 101 57 938 usw.). Stattdessen ist auch die Dosierung mit Farbmengenregelkreisen bekannt, die im Wesentlichen aus einem elektronischen Universalregler als Regelorgan, einem als Stellglied dienenden Farbdruckregler und einer Durchflussmesseinrichtung zur Istwert-Erfassung bestehen und dem als Absperrorgan dienenden Hauptnadelventil der üblichen Zerstäuber vorgeschaltet sind (Dürr/Behr Technisches Handbuch 02/1994 "Farbmengenregelung"; DE 101 42 355).In the currently used coating systems, those are robots or other programmatically movable machines changeable mounted atomizer with the required color change and dosing systems of the system by external hose lines connected. For color dosing are volumetrisch working Gear metering pumps or piston metering devices (metering cylinder) used in newer systems Color cables are upstream or downstream WO 86 06794, DE 100 33 987, DE 101 57 966, DE 101 57 938, etc.). Instead, the dosage is also known with color quantity control loops, which are essentially from an electronic universal regulator as a control element, a serving as an actuator color pressure regulator and a flow measuring device exist for actual value detection and the as a shut-off Serving main needle valve of the usual atomizer upstream (Dürr / Behr Technical Handbook 02/1994 "Color flow control"; DE 101 42 355).

Es ist auch schon bekannt, beispielsweise als Zahnradpumpe ausgebildete Dosierpumpen oder Kolbendosiereinrichtungen in den Zerstäuber einzubauen (DE 101 15 463; EP 0 693 319).It is also already known, for example, designed as a gear pump Dosing or Kolbendosiereinrichtungen in the To install atomizers (DE 101 15 463, EP 0 693 319).

Übliche Dosierpumpen und Kolbendosiereinrichtungen sind konstruktiv aufwendige, verschleißanfällige und wartungsaufwendige Bauteile und haben vor allem den Nachteil hoher Farb- und Spülmittelverluste, langer Farbwechselzeiten und hoher Andrückverluste bei jedem Farbwechsel. Zahnradpumpen benötigen zudem eine Stopfbuchsenpackung zum Abdichten der Antriebswelle. Sie sind deshalb schlecht spülbar und benötigen hohes Antriebsdrehmoment. Außerdem können die Zahnräder und andere fertigungstechnisch schwierige Bestandteile dieser Pumpen nur aus für Beschichtungszwecke u. U. nicht optimalen Werkstoffen hergestellt werden. Dosierzylinder sind dagegen wegen der relativ großen Kolbenfläche schlecht spülbar. Darüber hinaus ist keine kontinuierliche Förderung möglich, stattdessen erfordern sie aufwendige Befüllsysteme. Dosierzylinder haben aufgrund ihrer Bauform und Antriebseinrichtungen großen Platzbedarf und sind auch wegen der erforderlichen massiven Halterungen relativ schwer. Beim Einbau in einen Zerstäuber erhöhen sowohl Dosierzylinder als auch Zahnradpumpen in unerwünschter Weise dessen Gewicht und/oder Größe, was insbesondere bei der Roboterapplikation aus Gründen der Dynamik bzw. der Zugänglichkeit enger Werkstückbereiche nachteilig ist.Conventional metering pumps and Kolbendosiereinrichtungen are constructive elaborate, wear-prone and maintenance-consuming Components and above all have the disadvantage of high color and detergent losses, long color change times and high pressure losses every time you change color. Gear pumps also require a Stuffing box packing for sealing the drive shaft. they are therefore poorly flushable and require high drive torque. In addition, the gears and other manufacturing technology difficult components of these pumps only for coating purposes u. U. not optimal materials are produced. metering are, however, because of the relatively large piston area poorly rinsable. In addition, there is no continuous promotion possible, instead they require elaborate filling systems. Dosing cylinders have due to their design and drive devices large footprint and are also because of required massive brackets relatively heavy. During installation in an atomizer increase both dosing and gear pumps undesirably its weight and / or size, which is especially true for robot applications for reasons of dynamics or the accessibility of narrow workpiece areas disadvantageous is.

Diese Nachteile können zum Teil durch Einsatz der bekannten Farbmengenregelung vermieden werden, die aber eine wesentlich geringere Dosiergenauigkeit hat als die direkt das jeweils gewünschte Volumen fördernden Pumpen- oder Kolbendosierer. Da der Zerstäuber mit dem Stellglied des Regelkreises bisher über einen externen Farbschlauch verbunden war, ergibt sich beispielsweise für die Roboterapplikation das Problem untragbar langer Ansprechzeiten, das allenfalls durch besondere regelungstechnische Maßnahmen behoben werden kann (DE 101 48 097). Außerdem wird bei den üblichen Regelkreisen die Farbmenge mit Druckstellgliedern eingestellt, die von Membranen begrenzte große Toträume enthalten, entsprechend hohe Farb- und Spülmittelverluste verursachen und die in der schon erwähnten DE 101 42 355 beschriebenen weiteren Nachteile haben. These disadvantages can be partly due to the use of the known Color amount control can be avoided, but a significant lower dosing accuracy than the directly desired Volume-boosting pump or piston dispensers. Since the Atomizer with the actuator of the control loop so far about one external color hose was connected, for example, results the problem of prohibitively long response times for robot applications, at most by special control technology Measures can be remedied (DE 101 48 097). In addition, at the usual control circuits the amount of ink with pressure actuators adjusted, which contain large dead spaces bounded by membranes, correspondingly high paint and detergent losses and the further described in the already mentioned DE 101 42 355 Have disadvantages.

Der Erfindung liegt die Aufgabe zugrunde, eine Beschichtungsanlage bzw. einen Zerstäuber mit einer sehr genau dosierenden Pumpe anzugeben, die kleiner und leichter ist, ein wesentlich kleineres Totraumvolumen hat und im Falle eines Farbwechsels geringere Farb-, Spülmittel- und Zeitverluste verursacht als die bisher in Beschichtungsanlagen bekannten und üblichen Dosiereinrichtungen.The invention is based on the object, a coating system or a nebulizer with a very accurate dosing pump which is smaller and lighter, a much smaller one Dead space volume has smaller and in the case of a color change Color, detergent and time losses caused than previously in coating systems known and customary dosing.

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

Die erfindungsgemäß gewählte ventillose Kolbendosierpumpe ist im Prinzip an sich seit vielen Jahrzehnten bekannt (DE 509 222), wobei zur Erzeugung der einander überlagerten Translations- und Rotationsbewegungen u.a. verschiedene Gelenk- und Kurbelgetriebe verwendet wurden (DE 35 20 233, DE 196 19 675, DE 37 11 107, DE 198 25 769). Dosierpumpen in der erfindungsgemäß bevorzugten Ausfuhrungsform als sogenannte Taumelkolbenpumpe mit zur Änderung des Hubvolumens einstellbarem Neigungswinkel zwischen den Achsen der Antriebswelle und des Kolbens sind im Handel erhältlich. Die Erfindung beruht aber auf der Erkenntnis, dass diese spezielle Pumpe in Beschichtungsanlagen und Zerstäubern der hier betrachteten Art zahlreiche bisher nicht erkannte Vorteile hat.The valveless piston metering pump selected according to the invention is in Principle known per se for many decades (DE 509 222), wherein for generating the superimposed translation and Rotational movements u.a. various joint and crank gears were used (DE 35 20 233, DE 196 19 675, DE 37 11 107, DE 198 25 769). Metering pumps in the invention preferred Embodiment as a so-called wobble piston pump with to change of the stroke volume adjustable inclination angle between the Axes of the drive shaft and the piston are commercially available. However, the invention is based on the knowledge that these special pump in coating equipment and atomizers of here considered species has numerous previously unrecognized advantages.

Ein wichtiger Vorteil ist neben sehr hoher Dosiergenauigkeit u.a. das geringe Totraumvolumen der Pumpe, die u.a. deshalb nur geringe Farbwechselverluste verursacht. Zudem erlaubt die Form des Kolbenkopfes und des angrenzenden Innenraums der Pumpe schnelles und effektives Spülen, wodurch bei der Werkstückbeschichtung einerseits unerwünscht lange Produktionspausen vermieden werden und andererseits die Prozesssicherheit erhöht wird. An important advantage is besides very high dosing accuracy et al the small dead space volume of the pump, which i.a. therefore only causes slight color change losses. In addition, the shape allows the piston head and the adjacent interior of the pump fast and effective rinsing, resulting in workpiece coating on the one hand undesirably long production breaks avoided On the other hand, process reliability is increased becomes.

Insbesondere beim Einbau der ventillosen Pumpe in einen Zerstäuber hat sie ferner den Vorteil, dass sie wesentlich kleiner, leichter und einfacher ist als die in Beschichtungsanlagen bisher verwendeten Dosierpumpen und zudem mit relativ geringem Drehmoment, also mit kleinen und leichten Antriebsmotoren betrieben werden kann. Entsprechend klein und kompakt kann der Zerstäuber gebaut werden, was bei Beschichtungsmaschinen und insbesondere bei Robotern von Vorteil hinsichtlich der dynamischen Bewegbarkeit und hinsichtlich der Zugänglichkeit enger Werkstückbereiche und von Werkstückinnenbereichen ist.In particular, when installing the valveless pump in a nebulizer it also has the advantage of being much smaller, easier and easier than in coating systems so far used metering pumps and also with relatively low Torque, so operated with small and light drive motors can be. Accordingly small and compact can the Atomizers are built, resulting in coating machines and especially in robots advantageous in terms of dynamic Mobility and in terms of accessibility closer Workpiece areas and of workpiece inner areas is.

In elektrostatischen Zerstäubern oder sonstigen unter Hochspannung arbeitenden Bereichen einer Beschichtungsanlage kann auch die kleine elektrische Kapazität der kompakten ventillosen Kolbenpumpe günstig sein.In electrostatic atomizers or other under high voltage working areas of a coating plant can also the small electrical capacity of the compact valveless piston pump be cheap.

Wichtig ist in Beschichtungsanlagen ferner die Fähigkeit der betrachteten Pumpe, mit relativ hohem Druck zu dosieren, und zwar auch ohne Vordruck, da die Pumpe selbstsaugend arbeiten kann. Höherer Druck ermöglicht beispielsweise das Verarbeiten von bisher schwierig dosierbaren Beschichtungsmaterialien. Dazu gehören u.a. höherviskose Lacke und solche mit Festkörperpartikeln. Besonders geeignet ist die Pumpe auch zum Dosieren von Zweikomponenten-Lacken (2K) mit genau einhaltbarem Mischungsverhältnis in 2K-Mischeinheiten, die wesentlich kleiner und leichter sind als bisher und dadurch neue Platzierungsmöglichkeiten eröffnen. Aufgrund des möglichen hohen Drucks eignet sich die Pumpe z.B. gut für 2K-Wasserklarlacke.Also important in coating plants is the ability of the considered Pump to dose at a relatively high pressure, and indeed even without form, as the pump can work self-sucking. Higher pressure allows, for example, the processing of previously difficult to dose coating materials. This includes et al higher-viscosity paints and those with solid particles. Especially The pump is also suitable for dosing two-component paints (2K) with exactly maintainable mixing ratio in 2K mixing units that are much smaller and lighter than so far and thereby open new placement opportunities. by virtue of of the possible high pressure, the pump is suitable e.g. Well for 2K water clearcoat.

Weitere Vorteile sind der geringe Herstellungs- und Wartungsaufwand und die Lackverträglichkeit aufgrund verwendbarer günstiger Werkstoffe für die Pumpe wie insbesondere Keramik. Further advantages are the low production and maintenance costs and the paint compatibility due to usable cheaper Materials for the pump, especially ceramics.

Von Vorteil ist schließlich auch die Möglichkeit, problemlos die Förderrichtung der Dosierpumpe umzuschalten, wie es in Farbversorgungssystemen von Beschichtungsanlagen oft erforderlich ist.Another advantage is the possibility to easily use the Switching direction of the metering pump, as in paint supply systems Of coating equipment is often required.

Anhand der Zeichnung wird die Erfindung näher erläutert. Es zeigen

  • Fig. 1 den prinzipiellen Aufbau der ventillosen Dosierkolbenpumpe; und
  • Fig. 2 eine gemäß der Erfindung weitergebildete Pumpe nach Fig. 1.
    • The invention will be explained in more detail with reference to the drawing. Show it
  • Fig. 1 shows the basic structure of the valveless metering piston pump; and
  • Fig. 2 is a further developed according to the invention according to FIG. 1 pump.

    • Die in Fig. 1 schematisch dargestellte Kolbenpumpe 1 besteht in der Hauptsache aus einem in einer Zylinderbohrung 2 längs seiner Achse verschiebbaren zylindrischen Kolben 3 und einem durch den Pfeil bei 4 angedeutetem Antriebsmotor, der den Kolben verschiebt und gleichzeitig dreht. Quer in die Zylinderbohrung 2 führen einander koaxial gegenüberliegende Bohrungen, die als Einlassöffnung 8 bzw. Auslassöffnung 10 dienen.The piston pump 1 shown schematically in Fig. 1 consists in the main thing from one in a cylinder bore 2 along its Axially displaceable cylindrical piston 3 and a through the Arrow at 4 indicated drive motor which moves the piston and at the same time it turns. Transverse into the cylinder bore 2 lead each other coaxially opposed holes, as Inlet opening 8 and outlet opening 10 are used.

    Das Arbeitsprinzip dieser ventillosen Kolbenpumpe ist bekannt: Pro Hin- und Herbewegung dreht sich der Kolben 3 einmal um die eigene Achse. Beim Zurückziehen des Kolbens öffnet der flache Teil 6 am vorderen Kolbenende die Einlassöffnung 8. Dadurch wird die Flüssigkeit angesaugt und die Pumpkammer 9 gefüllt. Nachdem die Pumpkammer ganz gefüllt ist, dreht der Kolben weiter. Die Einlassöffnung 8 wird von dem Kolben 3 geschlossen, und mit dem Öffnen der Auslassöffnung 10 beginnt der Ausstoßhub. Aufgrund des Drehkolbenprinzips sind die Ein- und Auslassöffnungen 8, 10 nie gleichzeitig geöffnet. Zum Fördern wird die Auslassöffnung durch den flachen Kolbenteil 6 geöffnet und der Kolben 3 in der Zeichnung nach links gestoßen, wodurch die Flüssigkeit hinausgepumpt wird. Der Kolben wird dabei zum blasenfreien Fördern bis gegen den Boden der Zylinderbohrung 2 gestoßen. Nach der Entleerung der Pumpkammer 9 wird die Auslassöffnung 10 wieder von dem Kolben 6 geschlossen, während die Einlassöffnung 8 wieder geöffnet wird und ein weiterer Ansaughub beginnt.The working principle of this valveless piston pump is known: Per reciprocating the piston 3 rotates once around the own axis. When retracting the piston opens the flat Part 6 at the front end of the piston, the inlet opening 8. This is sucked in the liquid and filled the pumping chamber 9. After this the pumping chamber is completely filled, the piston continues to rotate. The Inlet opening 8 is closed by the piston 3, and with the Opening the outlet opening 10, the ejection stroke begins. by virtue of of the rotary piston principle are the inlet and outlet openings 8, 10th never opened at the same time. For conveying the outlet opening opened by the flat piston part 6 and the piston 3 in the Drawing pushed to the left, causing the liquid pumped out becomes. The piston is thereby for bubble-free pumping up pushed against the bottom of the cylinder bore 2. After emptying the pumping chamber 9, the outlet opening 10 again from the Piston 6 is closed while the inlet opening 8 is opened again and another intake stroke begins.

    Sowohl der Kolben 3 als auch der die Bohrung 2 enthaltende Zylinder können äußerst präzise vorzugsweise aus Keramik gefertigt werden.Both the piston 3 and the bore 2 containing cylinder can be extremely precise, preferably made of ceramic become.

    Die Kolbenpumpe kann direkt oder über eine lösbare Kupplung von einer kontinuierlich rotierenden Antriebswelle angetrieben werden. Vorzugsweise ist die Antriebswelle schwenkbar gelagert, so dass ihre Achse mit der Kolbenachse einen zur Änderung der Fördermenge verstellbaren Winkel bildet. Außer durch Änderung der Drehzahl des Antriebsmotors 4 kann also die Fördermenge auch durch Verändern der Neigung des Pumpenkopfes und die damit verbundene Änderung des Hubweges des Kolbens 3 in der Zylinderbohrung 2 verstellt werden.The piston pump can be directly or via a detachable coupling of a continuously rotating drive shaft are driven. Preferably, the drive shaft is pivotally mounted, so that their axis with the piston axis to change the flow rate adjustable angle forms. Except by changing the Speed of the drive motor 4 can therefore also the flow rate by changing the inclination of the pump head and the associated Change the stroke of the piston 3 in the cylinder bore 2 are adjusted.

    Zur Erzeugung der kombinierten Osziallations- und Drehbewegung des Kolbens 3 ist ein schematisch bei 5 angedeutetes Getriebe erforderlich, das der rotatorischen Antriebsbewegung des Motors eine translatorische Bewegung überlagert. Stattdessen kann auch ein Getriebe vorgesehen sein, das einer translatorischen Antriebsbewegung eine rotatorische Bewegung überlagert. Als Getriebe könnte beispielsweise eine der bekannten Gelenk- oder Kurbelkonstruktionen verwendet werden, doch kann für die Erfindung zweckmäßig auch ein Kurvengetriebe zwischen die rotierende Welle des Antriebsmotors und den Kolben geschaltet werden. Insbesondere kann eine den Kolben antreibende Kurvenscheibe zwischen der zu der Kolbenachse parallelen Antriebswelle und dem Kolben angeordnet sein, die das Drehmoment der rotierenden Antriebswelle axial zur Kolbenstange überträgt. Die mathematische Funktion, die die der Drehbewegung überlagerte definierte translatorische Bewegung des Kolbens im Zylinder beschreibt, kann frei programmierbar sein, beispielsweise bei Verwendung eines als Radiax-Motor bekannten radial-axialen Servomotors. To generate the combined oscillation and rotational movement of the piston 3 is a schematically indicated at 5 gears required, that of the rotary drive movement of the motor superimposed on a translatory movement. Instead, too a transmission may be provided which is a translational drive movement superimposed on a rotational movement. As a transmission For example, one of the known joint or Crank constructions can be used, but can for the invention expedient also a cam mechanism between the rotating Shaft of the drive motor and the piston to be switched. In particular can be a cam driving the piston between the parallel to the piston axis drive shaft and the Pistons can be arranged, which are the torque of the rotating drive shaft transmits axially to the piston rod. The mathematical Function which defines the defined translatory Describes movement of the piston in the cylinder can be freely programmable, for example when using a known as Radiax engine radial-axial servo motor.

    Die Übertragung der erzeugten definierten Bewegungen an den Kolben kann zweckmäßig über eine Magnetkupplung oder eine sonstige feste oder lösbare Kupplung erfolgen. Ferner kann zwischen dem Kolben und seinem Antriebsmotor eine flexible oder starre Zwischenwelle angeordnet sein.The transmission of the generated defined movements to the piston may be appropriate via a magnetic coupling or other fixed or releasable coupling done. Furthermore, between the Piston and its drive motor a flexible or rigid intermediate shaft be arranged.

    Wie schon erwähnt wurde, ist die Förderung der Kolbenpumpe vorzugsweise umsteuerbar.As already mentioned, the promotion of the piston pump is preferred reversible.

    Es können auch zwei oder mehr Kolbendosierpumpen der hier betrachteten Art vorgesehen sein, die mindestens einem Zerstäuber oder bei Einbau in einen Zerstäuber dessen die Austrittsöffnung für das Beschichtungsmaterial bildenden Farbdüse parallel oder in Reihe vorgeschaltet sein können, wobei die Kolbenbewegungen auch nach unterschiedlichen mathematischen Funktionen gesteuert sein können. Parallel geschaltete Dosierpumpen können beispielsweise für die Mischung von Zweikomponenten-Beschichtungsmaterialien eingesetzt werden.Two or more piston metering pumps may also be considered here Art be provided, the at least one atomizer or when installed in a nebulizer, the outlet opening for the coating material forming paint nozzle in parallel or can be connected in series, the piston movements also controlled by different mathematical functions could be. For example, parallel connected metering pumps for the mixture of two-component coating materials be used.

    Insbesondere bei Direktantrieb, d.h. direkt mit dem Kolben gekoppeltem Antriebsmotor kann dieser zur Einstellung eines gewünschten vorbestimmten Druckniveaus in der Zylinderkammer 9 gesteuert werden.Especially with direct drive, i. directly coupled to the piston Drive motor can this to set a desired controlled predetermined pressure levels in the cylinder chamber 9 become.

    Fig. 2 zeigt die Dosierpumpe nach Fig. 1 mit zusätzlichen Merkmalen der Erfindung.FIG. 2 shows the metering pump according to FIG. 1 with additional features the invention.

    Gemäß einer ersten Weiterbildung ist die Kolbenpumpe 1' mit zusätzlichen Anschlüssen 21 und 22 versehen, durch die z.B. ein flüssiges oder evtl. auch gasförmiges Reinigungsmedium zum Hinterspülen des Pumpenkopfes durch den hinteren, gegen die Pumpkammer 9 abgedichteten und daher drucklosen Zylinderraum 25 geleitet werden kann. Zum Abdichten kann zwischen dem Kolben und dem Zylinder 23 ein Dichtelement 24 sitzen. Die Anschlüsse 21, 22 können aber auch zum Einleiten und Herausleiten einer Flüssigkeit dienen, mit der beispielsweise optisch die Abdichtung des Kolbens 3 überwacht werden kann. Hierfür kann eine lackverträgliche transparente Flüssigkeit (wie "Mesanol") verwendet werden, die sich bei Dichtungslecks verfärbt, was z.B. in einem transparenten Leitungsteil am Auslassanschluss 22 visuell beobachtet und/oder zur automatischen Erzeugung eines Alarmsignals optisch ausgewertet werden kann.According to a first embodiment, the piston pump 1 'with additional Terminals 21 and 22, through which e.g. on liquid or possibly also gaseous cleaning medium for backwashing of the pump head through the rear, against the pumping chamber 9 sealed and therefore depressurized cylinder chamber 25 passed can be. For sealing can be between the piston and the cylinder 23 a sealing element 24 sit. The connections 21, 22 can also be used to introduce and discharge a liquid serve, with the example optically the seal of the piston 3 can be monitored. For this purpose, a paint compatible transparent liquid (such as "mesanol") is used which discolor with seal leaks, e.g. in one transparent conduit part at the outlet port 22 visually observed and / or for the automatic generation of an alarm signal can be visually evaluated.

    Eine andere Weiterbildung besteht darin, dass an die durch die Pfeile 26 und 27 angedeuteten Ein- und Auslassleitungen für das Beschichtungsmaterial eine Bypass-Leitung 28 angeschlossen ist, die den Förderweg der Pumpe umgeht und im normalen Betrieb durch das steuerbare Ventil 29 gesperrt ist.Another development is that of the by the Arrows 26 and 27 indicated inlet and outlet lines for the Coating material is connected to a bypass line 28, which bypasses the pump delivery path and during normal operation the controllable valve 29 is locked.

    Claims (13)

    1. Coating installation for series coating of workpieces, particularly with coating material of alternating colour, with an atomiser, at the spray head of which the coating material emerges at an adjustable and controllable discharge rate, and with a metering pump (1) for the coating material which is driven in a controlled manner and is connected between a material supply system and the outlet opening of the spray head, characterised in that the metering pump is a valveless piston pump (1) in which with each stroke movement the piston (3) is rotated about its axis extending in the direction of travel.
    2. Coating installation as claimed in Claim 1, characterised in that the piston pump (1) is driven by a continuously rotating drive shaft directly or via a releasable coupling.
    3. Coating installation as claimed in Claim 2, characterised in that the drive shaft is pivotably mounted and with the axis of the piston forms an adjustable angle for changing the conveyed quantity.
    4. Coating installation as claimed in any one of the preceding claims, characterised in that a cam mechanism (5) is connected between the piston (3) and the drive motor (4) thereof and superimposes a translatory motion upon the rotary driving motion or superimposes a rotary motion upon the translatory driving motion.
    5. Coating installation as claimed in Claim 4, characterised in that a disc cam which drives the piston is disposed between the piston and the drive shaft which is parallel to the axis of the piston.
    6. Coating installation as claimed in any one of the preceding claims, characterised in that the piston is driven by way of a magnetic clutch.
    7. Coating installation as claimed in any one of the preceding claims, characterised in that between the piston and the drive motor (4) thereof there are disposed a gear unit (5), a fixed or releasable coupling and/or a flexible or rigid intermediate shaft.
    8. Coating installation as claimed in any one of the preceding claims, characterised in that pipes (21, 22) for a cleaning medium for flushing the cylindrical chamber (25) at the rear part of the piston (3) and/or for a control fluid for indicating leaking seals within the pump are connected to the metering pump (1').
    9. Coating installation as claimed in any one of the preceding claims, characterised in that two or more valveless piston pumps are connected in parallel or in series before the atomiser or the discharge opening thereof for the coating material.
    10. Coating installation as claimed in any one of the preceding claims, characterised in that the conveying direction of the valveless piston pumps (1) is reversible.
    11. Coating installation as claimed in any one of the preceding claims, characterised in that a bypass (28) with a controlled valve (29) is disposed between the inlet (26) and the outlet (27) of the valveless piston pump (1').
    12. Coating installation as claimed in any one of the preceding claims, characterised in that the motor (4) which directly drives the piston (3) is controlled in order to set a predetermined pressure in the cylindrical chamber (2) of the piston pump (1).
    13. Atomiser for a coating installation as claimed in any one of Claims 1 to 12, with a spray head and a metering pump for the coating material which is connected before the outlet opening of the spray head for the coating material within the atomiser and is driven in a controlled manner for setting the discharge rate, characterised in that the metering pump located in the atomiser is a valveless piston pump (1) in which with each stroke movement the piston (3) is rotated about its axis extending in the direction of travel.
    EP03006080A 2002-03-25 2003-03-19 Coating installation with an atomizer and a dosage pump Expired - Lifetime EP1348487B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10213270A DE10213270A1 (en) 2002-03-25 2002-03-25 Coating plant with an atomizer and a metering pump
    DE10213270 2002-03-25

    Publications (2)

    Publication Number Publication Date
    EP1348487A1 EP1348487A1 (en) 2003-10-01
    EP1348487B1 true EP1348487B1 (en) 2004-08-04

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    Application Number Title Priority Date Filing Date
    EP03006080A Expired - Lifetime EP1348487B1 (en) 2002-03-25 2003-03-19 Coating installation with an atomizer and a dosage pump

    Country Status (4)

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    EP (1) EP1348487B1 (en)
    AT (1) ATE272449T1 (en)
    DE (2) DE10213270A1 (en)
    ES (1) ES2225804T3 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN102498293A (en) * 2009-08-21 2012-06-13 杜尔系统有限责任公司 Rotary piston pump for metering a coating agent

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2731728B1 (en) 2011-07-14 2017-05-03 Dedert Corporation Rotary atomizer having electro-magnetic bearngs and a permanent magnet rotor
    US20140231549A1 (en) * 2011-09-28 2014-08-21 Sensile Pat Ag Fluid dispensing system
    CN103858850B (en) * 2012-12-18 2016-06-01 范明合 Agricultural full-automatic composite formula insecticide-spraying machine
    DE102016108020A1 (en) * 2016-04-29 2017-11-02 Polyplan Gmbh Polyurethan-Maschinen Function block for a polyurethane system
    CN111530652B (en) * 2020-05-14 2024-09-06 安徽伽马莱恩机器人有限公司 Self-walking type atomization disinfection robot

    Family Cites Families (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO1986006794A1 (en) * 1985-05-10 1986-11-20 Bergman, Manfred Valve-free piston pump

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN102498293A (en) * 2009-08-21 2012-06-13 杜尔系统有限责任公司 Rotary piston pump for metering a coating agent
    CN102498293B (en) * 2009-08-21 2016-01-20 杜尔系统有限责任公司 For measuring the oscillating plunger pump of coating media

    Also Published As

    Publication number Publication date
    DE10213270A1 (en) 2003-10-16
    ES2225804T3 (en) 2005-03-16
    EP1348487A1 (en) 2003-10-01
    ATE272449T1 (en) 2004-08-15
    DE50300045D1 (en) 2004-09-09

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