EP3983135A1 - Monitoring method and application device for a multi-component viscous material - Google Patents

Monitoring method and application device for a multi-component viscous material

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Publication number
EP3983135A1
EP3983135A1 EP20736253.4A EP20736253A EP3983135A1 EP 3983135 A1 EP3983135 A1 EP 3983135A1 EP 20736253 A EP20736253 A EP 20736253A EP 3983135 A1 EP3983135 A1 EP 3983135A1
Authority
EP
European Patent Office
Prior art keywords
pressure
measured
test
during
static mixer
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
EP20736253.4A
Other languages
German (de)
French (fr)
Other versions
EP3983135B1 (en
Inventor
Tobias ROSENAUER
Christian Kammerer
Erich Lehner
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.)
Atlas Copco IAS GmbH
Original Assignee
Atlas Copco IAS GmbH
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Application filed by Atlas Copco IAS GmbH filed Critical Atlas Copco IAS GmbH
Publication of EP3983135A1 publication Critical patent/EP3983135A1/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
    • B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/36—Mixing of ingredients for adhesives or glues; Mixing adhesives and gas

Definitions

  • the invention relates to a method for monitoring a device for applying an at least two-component viscous material to workpieces and a device according to the preamble of claim 11.
  • a device of this type is described, for example, in the unpublished German patent application 102018 119838. It has a static mixer that mixes a two- or multi-component material by introducing the components separately into it and mixing them automatically as it passes through the static mixer or the mixing helix contained in it. The mixed material then emerges at the material outlet, for example a two-component adhesive, which then hardens on the workpiece.
  • the components are fed separately from one another via the respective feed channel into the material inlet of the static mixer, whereby they are dosed by means of the dosing valves.
  • a typical order cycle for example, consists in first flushing a specified volume of material, which is usually one and a half times the volume of the static mixer, into a waste container to remove old, partially already reacted and no longer readily usable material Remove static mixer. The static mixer is then moved to the workpiece and the material is applied to the workpiece. After the end of the application, the workpiece is changed, the workpiece coated with the viscous material being removed from the workpiece holder and replaced by an uncoated workpiece. Then the begins Process from the beginning, whereby the static mixer is rinsed first, then moved to the workpiece and then the material is applied to the workpiece.
  • the static mixers are wearing parts that can become clogged with material over time or burst when subjected to heavy use, so that the material application deviates from the ideal value.
  • errors affecting the application of material can also occur on the dosing unit, for example if a feed channel is narrowed or blocked or if, when cleaning the dosing unit, material from one component was wiped to the end of the feed channel of another component and there men together with the other material is cured.
  • Such errors are often not recognized in fully automatic order processes.
  • Operating errors can also occur, for example such that the operating staff forgets to insert a mixing helix in the static mixer used, so that the components are not sufficiently mixed and then do not cure sufficiently on the workpiece. Such defects are usually only recognized late, and the incorrectly coated workpieces are rejected.
  • the invention is based on the idea that there is always a typical pressure profile in the feed channels of the metering unit when material is applied between the start of the order and the end of the order. Significant deviations from the typical pressure curve indicate a system error. This is mainly especially the case when, as is preferred here, a volume-controlled material application takes place, in which a predetermined volume of each component is introduced into the static mixer per unit of time. If the static mixer bursts or is operated without a mixing helix, the pressures measured in the supply ducts when applying the material are usually significantly lower than when applying the typical material. If the static mixer is blocked by hardened material, the pressure in the supply channels is much higher than with typical material application.
  • the pressure in only one of the supply ducts may be sufficient to measure the pressure in only one of the supply ducts both during the test run and during the application of the material.
  • the pressure is measured and documented at several predetermined measuring times between the start of the test order and the end of the test order in each of the supply ducts by means of a pressure sensor, and that during the material orders between the start of the order and the end of the order at the same predetermined times How in the test run the pressure is measured in each supply channel and for each of the supply channels the pressure measurement values of the material orders are compared with the corresponding pressure measurement values of the test run. This corresponds to a monitoring of all supply ducts, which brings more reliable results than monitoring only one supply duct.
  • the pressure measurement values measured in a supply duct during the material applications are always compared with the pressure measurement values measured in the same supply duct during the test run at the same point in time. With the same point in time is This means the identical interval between the time from the start of the order for material orders and from the start of the test order during the test run. It is possible here for the pressure in the respective supply duct to be measured at discrete times during the test run and when the material is applied, so that only the pressure measured values measured at the discrete times can be compared with one another. It is preferred here that the pressure in the respective supply duct is measured at constant time intervals during the test run and during the application of material.
  • the pressure in the respective supply duct can be measured continuously during the test run and / or when the material is applied, so that a pressure measured value is measured at an almost infinite number of times for each material application, which can be compared with the corresponding measured value of the test run .
  • a combination is also possible in which the pressure in the respective supply duct is measured at discrete times during the test run and continuously when the material is applied, or vice versa. It is preferred that the pressure in the respective supply channel is measured in the direction of flow of the relevant component in front of the valve seat. In this way, constrictions in the area of the valve seat can also be detected.
  • a signaling device is expediently provided which generates a warning signal if one or more pressure measurement values of a material application deviates or deviates from the corresponding pressure measurement value (s) of the test run by more than a predetermined tolerance.
  • the warning signal can also be varied as a function of the size of the deviation, for example to indicate that there is only a slight deviation that suggests monitoring with increased attention, or that a significant deviation occurs that suggests a significant error .
  • FIG. 1 shows an application device for two-component viscous material in a partial representation in section with a static mixer fixed to a metering unit and
  • FIG. 2 shows the pressure curves in the supply channels of the device according to FIG. 1 with a typical application of material.
  • the device 10 partially shown in the drawing (Fig. 1) is used to order a two-component adhesive on workpieces. It has a dosing unit 12 and a static mixer 14 which is moved relative to the workpieces by means of a robot, not shown, during the material application.
  • the dosing unit 12 has a valve block 16, only partially shown in FIG. 1, with two dosing valves 18, which act as needle valves are trained.
  • the metering unit 12 has a coupling device 20 which is detachably and firmly connected to the valve block 16, and in which the valve seats 22 are net angeord.
  • the valve needles 24 extend into the coupling device 20 and open and close the metering valves 18 on the valve seats 22.
  • the static mixer 14 has a coupling part 26 which engages in the coupling device 20 and is releasably fixed thereto.
  • the static mixer 14 also has a mixing tube 28 which extends from a material inlet 30 at its first end to a material outlet 32 at its second end.
  • the mixing tube is widened at the material inlet 30 and communicates there with the metering valves 18.
  • At the material outlet 32 it is conically narrowed.
  • It has an inner tube 34 made of plastic, which has the material inlet 30 and the material outlet 32 and in which a mixing helix 36 is arranged.
  • a support tube 38 made of metal, which extends over the greater part of the length of the inner tube 34 and rests on its outer jacket surface.
  • the two components base component and hardener
  • the two components are each metered into the material inlet 30 by means of one of the metering valves 18 and fed to the mixing helix 36.
  • the two components mix on their way to material outlet 32.
  • Two feed channels 48 run through the metering unit 12, each of which opens into the material inlet 30 and can be blocked and released at the valve seats 22 by means of the valve needles 24.
  • Each of the supply channels 48 is used to supply one of the two components.
  • a pressure sensor (not shown in detail) with which the pressure in the respective supply channel 48 measured who can. The measured values of the pressure sensors 50 are evaluated in an evaluation device which is not shown in detail.
  • the application of the adhesive is volume-controlled, with a given amount or a given volume of each of the two components being introduced into the static mixer 14 per unit of time.
  • the pressure in the supply channels 48 is plotted over the time axis 46 for a typical application of material.
  • Such material applications are mostly repeated identically when a large number of identical workpieces are coated with regard to the material flow in the supply channels 48 and therefore have essentially identical pressure profiles, provided that the device 10 is not changed.
  • an order start 52 is followed by a rinsing phase 54, while the residual material is rinsed from the static mixer 14 into a waste container. Accordingly, the pressure rises briefly in both supply ducts 48 until partially crosslinked or cured adhesive has been flushed out of the mixing tube 28.
  • the rinsing phase 54 is followed by a first waiting phase 56, during which the application device 10 is moved to a workpiece by means of a robot, and during which both metering valves 18 are closed.
  • the first waiting phase 56 is followed by the application phase 58, during which both metering valves 18 are open and material is applied to a workpiece.
  • the order phase 58 is followed by a second waiting phase 60, during which the metering valves 18 are again closed in order to transport away the workpiece coated with adhesive and replace it with an uncoated workpiece which ends at an application end 62.
  • the second waiting phase 60 during which the basic component is still pumped into the metering unit 12 so that its pressure curve 64 does not drop to zero, is followed by the rinsing phase 54 of a subsequent material application.
  • the pressure curve 64 of the basic component and the pressure curve 66 of the hardener are plotted over the time axis 46.
  • the pressure curves 64, 66 plotted over the time axis 46 are largely identical for each material application.
  • the present invention makes use of this fact to monitor the material application. For this purpose, a test application of the material is carried out before the first material application, which is used to generate target values.
  • test order between a test order start and a test order end, the time interval between which is identical to the distance between the order start 52 and the order end 62, material is applied to a test workpiece or is simply dispensed from the dosing unit 12, for example into a waste container, whereby the volume flows of the components are controlled in such a way that their chronological sequence is identical to the chronological sequence of the volume flows of the subsequent material orders.
  • the pressure curves measured during the test run which are not shown separately here, but essentially correspond to the pressure curves 64, 66 shown in FIG. 2, are stored in a data memory of the evaluation device. They serve as setpoints with which the pressure curves 64, 66 of the fol lowing material orders are compared.
  • the pressures measured in the supply ducts 48 are compared with the pressure measured at the same point in time during the test run. At the same point in time means that this point in time is removed from the respective job start 52 by the same time span as the measurement time of the setpoint to be compared from the test job start. If a pressure measured value or an entire pressure curve 64, 66 deviates too much from the comparable setpoint value or the comparable setpoint curve, this is a sign that the device 10 must be subjected to a check.
  • a signaling device not shown in the drawing, is provided, which represents a degree of deviation and suggests suitable measures to the user, such as carrying out more precise monitoring or shutting down the device for the purpose of checking or maintenance.
  • the invention relates, among other things, to a method for monitoring a device 10 for applying an at least two-component viscous material to workpieces, which has a metering unit 12 with a number of metering valves 18 corresponding to the number of components of the viscous material and a the metering unit 12 has releasably attached static mixer 14 for mixing the components, the static mixer 14 having a material inlet 30 facing the metering unit 12 and a material outlet 32 facing away from the metering unit 12, and each metering valve 18 having a feed channel 48 that can be closed at a valve seat 22 of the respective component to the static mixer 14, a number of material orders being carried out one after the other, each having an identical predetermined time sequence between an order start 52 and an order end 62, the mat erial orders is preceded by at least one test run in which material is dispensed from the dosing unit 12 and applied to a test workpiece, for example, and which has the same timing as the material orders

Abstract

The invention relates to a method for monitoring a device (10) for applying an at least two-component viscous material to workpieces, comprising a metering unit (12) having a number of metering valves (18) corresponding with the number of components of the viscous material, as well as comprising a static mixer (14) detachably secured to the metering unit (12) for blending the components, wherein the static mixer (14) has a material inlet (30) facing the metering unit (12) and a material outlet (32) facing away from the metering unit (12), and wherein each metering valve (18) has a supply channel (48) that can be sealingly connected to a valve seat (22) for supplying the respective component to the static mixer (14), wherein a number of material applications are carried out after one another, each having an identical predetermined time between a start (52) of the application and an end (62) of the application. According to the invention, during the material applications, between the start (52) of the application and the end (62) of the application, at predetermined times, the pressure in at least one of the supply channels (48) is measured by means of a pressure sensor (50) and preferably measured in all supply channels (48) by means of a respective pressure sensor (50).

Description

Überwachungsverfahren sowie Auftraqsvorrichtunq für mehrkomponentiges viskoses Material Monitoring process and application device for multi-component viscous material
Die Erfindung betrifft ein Verfahren zum Überwachen einer Vorrichtung zum Auf trägen eines mindestens zweikomponentigen viskosen Materials auf Werkstücke sowie eine Vorrichtung gemäß Oberbegriff des Anspruchs 11. Eine Vorrichtung dieser Art ist beispielsweise in der nicht vorveröffentlichten deutschen Patentanmeldung 102018 119838 beschrieben. Sie weist einen Sta tikmischer auf, der ein zwei- oder mehrkomponentiges Material mischt, indem die Komponenten separat in ihn eingeleitet werden und sich beim Durchlauf durch den Statikmischer bzw. die in ihm enthaltene Mischwendel selbsttätig vermischen Am Materialauslass tritt dann das durchmischte Material aus, beispielsweise ein Zweikomponentenkleber, der dann auf dem Werkstück aushärtet. Die Komponen ten werden getrennt voneinander über den jeweiligen Zuleitungskanal in den Ma terialeinlass in den Statikmischer eingeleitet, wobei sie mittels der Dosierventile dosiert werden. Ein typischer Zyklus beim Aufträgen besteht beispielsweise darin, dass zunächst ein vorgegebenes Volumen an Material, das meist das eineinhalb fache bis zweifache Volumen des Statikmischers beträgt, in einen Abfallbehälter gespült wird, um altes, teilweise schon reagiertes und nicht mehr ohne weiteres brauchbares Material aus dem Statikmischer zu entfernen. Anschließend wird der Statikmischer zum Werkstück gefahren, und das Material wird auf das Werkstück aufgetragen. Nach dem Auftragsende wird das Werkstück gewechselt, wobei das mit dem viskosen Material beschichtete Werkstück aus der Werkstückhalterung entfernt und durch ein unbeschichtetes Werkstück ersetzt wird. Dann beginnt der Prozess von vorne, wobei zunächst der Statikmischer gespült wird, anschließend zum Werkstück bewegt wird und dann das Material auf das Werkstück aufgetra gen wird. The invention relates to a method for monitoring a device for applying an at least two-component viscous material to workpieces and a device according to the preamble of claim 11. A device of this type is described, for example, in the unpublished German patent application 102018 119838. It has a static mixer that mixes a two- or multi-component material by introducing the components separately into it and mixing them automatically as it passes through the static mixer or the mixing helix contained in it. The mixed material then emerges at the material outlet, for example a two-component adhesive, which then hardens on the workpiece. The components are fed separately from one another via the respective feed channel into the material inlet of the static mixer, whereby they are dosed by means of the dosing valves. A typical order cycle, for example, consists in first flushing a specified volume of material, which is usually one and a half times the volume of the static mixer, into a waste container to remove old, partially already reacted and no longer readily usable material Remove static mixer. The static mixer is then moved to the workpiece and the material is applied to the workpiece. After the end of the application, the workpiece is changed, the workpiece coated with the viscous material being removed from the workpiece holder and replaced by an uncoated workpiece. Then the begins Process from the beginning, whereby the static mixer is rinsed first, then moved to the workpiece and then the material is applied to the workpiece.
Die Statikmischer sind Verschleißteile, die sich im Lauf der Zeit mit Material zu- setzen oder bei starker Beanspruchung auch platzen können, so dass der Materi alauftrag vom Idealwert abweicht. Den Materialauftrag beeinflussende Fehler können aber auch an der Dosiereinheit auftreten, beispielsweise dann, wenn ein Zuleitungskanal verengt oder verstopft ist oder wenn beim Reinigen der Dosie reinheit Material der einen Komponente zum Ende des Zuleitungskanals einer anderen Komponente gewischt wurde und dort mit dem anderen Material zusam men ausgehärtet ist. Solche Fehler werden oftmals bei vollautomatischen Auf tragsverfahren nicht erkannt. Auch Bedienfehler können auftreten, beispielsweise dergestalt, dass das Bedienpersonal vergisst, eine Mischwendel in den verwen deten Statikmischer einzusetzen, so dass die Komponenten nicht ausreichend durchmischt werden und dann auf dem Werkstück nicht hinreichend aushärten. Solche Fehler werden meist erst spät erkannt, und die fehlerhaft beschichteten Werkstücke sind Ausschuss. The static mixers are wearing parts that can become clogged with material over time or burst when subjected to heavy use, so that the material application deviates from the ideal value. However, errors affecting the application of material can also occur on the dosing unit, for example if a feed channel is narrowed or blocked or if, when cleaning the dosing unit, material from one component was wiped to the end of the feed channel of another component and there men together with the other material is cured. Such errors are often not recognized in fully automatic order processes. Operating errors can also occur, for example such that the operating staff forgets to insert a mixing helix in the static mixer used, so that the components are not sufficiently mixed and then do not cure sufficiently on the workpiece. Such defects are usually only recognized late, and the incorrectly coated workpieces are rejected.
Es ist daher Aufgabe der Erfindung, ein Verfahren zum Überwachen einer Vor richtung zum Aufträgen eines mindestens zweikomponentigen viskosen Materials auf Werkstücke bereitzustellen, mit dem das Auftreten von fehlerhaften Material aufträgen frühzeitig erkannt werden kann. It is therefore the object of the invention to provide a method for monitoring a device for applying an at least two-component viscous material to workpieces, with which the occurrence of defective material orders can be detected at an early stage.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Eine weitere erfindungsgemäße Lösung besteht in einer Vorrichtung mit den Merkmalen des Anspruchs 11. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche. According to the invention, this object is achieved by a method having the features of claim 1. Another solution according to the invention consists in a device with the features of claim 11. Advantageous developments of the invention are the subject matter of the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, dass in den Zuleitungskanälen der Dosiereinheit beim Materialauftrag zwischen dem Auftragsstart und dem Auf tragsende immer ein typischer Druckverlauf gegeben ist. Signifikante Abweichun gen vom typischen Druckverlauf deuten auf einen Systemfehler hin. Dies ist ins- besondere dann der Fall, wenn, wie hier bevorzugt, ein volumengesteuerter Mate rialauftrag erfolgt, bei dem von jeder Komponente ein vorgegebenes Volumen pro Zeiteinheit in den Statikmischer eingeleitet wird. Wenn der Statikmischer platzt oder ohne Mischwendel betrieben wird, sind die in den Zuleitungskanälen gemes senen Drücke beim Materialauftrag in der Regel deutlich niedriger als beim typi schen Materialauftrag. Wenn der Statikmischer durch ausgehärtetes Material zu gesetzt ist, ist der Druck in den Zuleitungskanälen wesentlich höher als beim typi schen Materialauftrag. Auch dann, wenn einer der Zuleitungskanäle verengt ist, wird in diesem ein deutlich zu hoher Druck gemessen. Dabei können die Druck messwerte der Materialaufträge einfach mit gespeicherten Sollwerten verglichen werden. Gemäß einer vorteilhaften Weiterbildung der Erfindung wir vor Inbetrieb nahme der Auftragsvorrichtung ein Testlauf durchgeführt, bei dem typische Druckmesswerte gemessen werden. Mit diesen Werten werden die Werte jedes Materialauftrags verglichen, wobei eine signifikante Abweichung von den Druck messwerten des Testlaufs auf einen Fehler hindeutet, der ein Eingreifen erfordert. The invention is based on the idea that there is always a typical pressure profile in the feed channels of the metering unit when material is applied between the start of the order and the end of the order. Significant deviations from the typical pressure curve indicate a system error. This is mainly especially the case when, as is preferred here, a volume-controlled material application takes place, in which a predetermined volume of each component is introduced into the static mixer per unit of time. If the static mixer bursts or is operated without a mixing helix, the pressures measured in the supply ducts when applying the material are usually significantly lower than when applying the typical material. If the static mixer is blocked by hardened material, the pressure in the supply channels is much higher than with typical material application. Even if one of the supply ducts is narrowed, a pressure that is clearly too high is measured in it. The pressure measured values of the material orders can be easily compared with stored target values. According to an advantageous development of the invention, a test run is carried out before the application device is put into operation, in which typical pressure measurements are measured. The values of each material application are compared with these values, with a significant deviation from the pressure measured values of the test run indicating an error that requires intervention.
Es kann ausreichend sein, sowohl während des Testlaufs als auch während des Materialauftrags den Druck nur in einem der Zuleitungskanäle zu messen. Es wird jedoch bevorzugt, dass während des Testlaufs an mehreren vorbestimmten Messzeitpunkten zwischen dem Testauftragsstart und dem Testauftragsende in jedem der Zuleitungskanäle mittels jeweils eines Drucksensors der Druck gemes sen und dokumentiert wird, und dass während der Materialaufträge zwischen dem Auftragsstart und dem Auftragsende an denselben vorbestimmten Zeitpunkten wie im Testlauf der Druck in jedem Zuleitungskanal gemessen wird und bei jedem der Zuleitungskanäle die Druckmesswerte der Materialaufträge mit den entsprechen den Druckmesswerten des Testlaufs verglichen werden. Dies entspricht einer Überwachung aller Zuleitungskanäle, die zuverlässigere Ergebnisse bringt als die Überwachung nur eines Zuleitungskanals. It may be sufficient to measure the pressure in only one of the supply ducts both during the test run and during the application of the material. However, it is preferred that during the test run the pressure is measured and documented at several predetermined measuring times between the start of the test order and the end of the test order in each of the supply ducts by means of a pressure sensor, and that during the material orders between the start of the order and the end of the order at the same predetermined times How in the test run the pressure is measured in each supply channel and for each of the supply channels the pressure measurement values of the material orders are compared with the corresponding pressure measurement values of the test run. This corresponds to a monitoring of all supply ducts, which brings more reliable results than monitoring only one supply duct.
Verglichen werden stets die bei den Materialaufträgen in einem Zuleitungskanal gemessenen Druckmesswerte mit dem im selben Zuleitungskanal beim Testlauf zum selben Zeitpunkt gemessenen Druckmesswert. Mit demselben Zeitpunkt ist der identische Abstand des Zeitpunkts vom Auftragsstart bei den Materialaufträ gen und vom Testauftragsstart beim Testlauf gemeint. Dabei ist es möglich, dass der Druck im jeweiligen Zuleitungskanal beim Testlauf und beim Materialauftrag jeweils zu diskreten Zeitpunkten gemessen wird, so dass nur die zu den diskreten Zeitpunkten gemessenen Druckmesswerte miteinander verglichen werden kön nen. Hierbei wird bevorzugt, dass der Druck im jeweiligen Zuleitungskanal beim Testlauf und beim Materialauftrag in konstanten Zeitabständen gemessen wird.The pressure measurement values measured in a supply duct during the material applications are always compared with the pressure measurement values measured in the same supply duct during the test run at the same point in time. With the same point in time is This means the identical interval between the time from the start of the order for material orders and from the start of the test order during the test run. It is possible here for the pressure in the respective supply duct to be measured at discrete times during the test run and when the material is applied, so that only the pressure measured values measured at the discrete times can be compared with one another. It is preferred here that the pressure in the respective supply duct is measured at constant time intervals during the test run and during the application of material.
Es ist jedoch auch möglich, dass der Druck im jeweiligen Zuleitungskanal beim Testlauf und/oder beim Materialauftrag jeweils kontinuierlich gemessen wird, so dass quasi zu unendlich vielen Zeitpunkten bei jedem Materialauftrag ein Druck messwert gemessen wird, der mit dem entsprechenden Messwert des Testlaufs verglichen werden kann. Auch eine Kombination, bei der der Druck im jeweiligen Zuleitungskanal beim Testlauf zu diskreten Zeitpunkten und beim Materialauftrag kontinuierlich gemessen wird oder umgekehrt, ist möglich. Es wird bevorzugt, dass der Druck im jeweiligen Zuleitungskanal in Fließrichtung der betreffenden Komponente vor dem Ventilsitz gemessen wird. Auf diese Weise können auch Verengungen im Bereich des Ventilsitzes erkannt werden. However, it is also possible for the pressure in the respective supply duct to be measured continuously during the test run and / or when the material is applied, so that a pressure measured value is measured at an almost infinite number of times for each material application, which can be compared with the corresponding measured value of the test run . A combination is also possible in which the pressure in the respective supply duct is measured at discrete times during the test run and continuously when the material is applied, or vice versa. It is preferred that the pressure in the respective supply channel is measured in the direction of flow of the relevant component in front of the valve seat. In this way, constrictions in the area of the valve seat can also be detected.
Zweckmäßig ist eine Signaleinrichtung vorgesehen, die ein Warnsignal erzeugt, wenn einer oder mehrere Druckmesswerte eines Materialauftrags um mehr als eine vorbestimmte Toleranz von dem oder den entsprechenden Druckmess- wert(en) des Testlaufs abweicht bzw. abweichen. Auf diese Weise wird dem Be dienpersonal angezeigt, wenn ein Fehler auftritt und die Auftragsvorrichtung überprüft werden muss. Das Warnsignal kann zudem in Abhängigkeit von der Größe der Abweichung variiert werden, um beispielsweise anzuzeigen, dass le- diglich eine geringe Abweichung auftritt, die eine Überwachung mit erhöhter Auf merksamkeit nahelegt, oder dass eine deutliche Abweichung auftritt, die auf einen erheblichen Fehler schließen lässt. A signaling device is expediently provided which generates a warning signal if one or more pressure measurement values of a material application deviates or deviates from the corresponding pressure measurement value (s) of the test run by more than a predetermined tolerance. In this way, the operating staff is shown when an error occurs and the application device needs to be checked. The warning signal can also be varied as a function of the size of the deviation, for example to indicate that there is only a slight deviation that suggests monitoring with increased attention, or that a significant deviation occurs that suggests a significant error .
Im Folgenden wird die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen Fig. 1 eine Auftragsvorrichtung für zweikomponentiges viskoses Material in einer Teildarstellung im Schnitt mit an einer Dosiereinheit fixiertem Sta tikmischer und The invention is explained in more detail below using an exemplary embodiment shown schematically in the drawing. Show it Fig. 1 shows an application device for two-component viscous material in a partial representation in section with a static mixer fixed to a metering unit and
Fig. 2 die Druckverläufe in den Zuleitungskanälen der Vorrichtung gemäß Fig. 1 bei einem typischen Materialauftrag. FIG. 2 shows the pressure curves in the supply channels of the device according to FIG. 1 with a typical application of material.
Die in der Zeichnung (Fig. 1 ) teilweise dargestellte Vorrichtung 10 dient dem Auf trag eines zweikomponentigen Klebstoffs auf Werkstücke. Sie weist eine Dosie reinheit 12 sowie einen Statikmischer 14 auf, die mittels eines nicht dargestellten Roboters während des Materialauftrags relativ zu den Werkstücken bewegt wird Die Dosiereinheit 12 weist einen in Fig. 1 nur teilweise gezeigten Ventilblock 16 mit zwei Dosierventilen 18 auf, die als Nadelventile ausgebildet sind. Des Weite ren weist die Dosiereinheit 12 eine Kupplungseinrichtung 20 auf, die lösbar und fest mit dem Ventilblock 16 verbunden ist, und in der die Ventilsitze 22 angeord net sind. Die Ventilnadeln 24 erstrecken sich in die Kupplungseinrichtung 20 und öffnen und schließen die Dosierventile 18 an den Ventilsitzen 22. The device 10 partially shown in the drawing (Fig. 1) is used to order a two-component adhesive on workpieces. It has a dosing unit 12 and a static mixer 14 which is moved relative to the workpieces by means of a robot, not shown, during the material application. The dosing unit 12 has a valve block 16, only partially shown in FIG. 1, with two dosing valves 18, which act as needle valves are trained. Furthermore, the metering unit 12 has a coupling device 20 which is detachably and firmly connected to the valve block 16, and in which the valve seats 22 are net angeord. The valve needles 24 extend into the coupling device 20 and open and close the metering valves 18 on the valve seats 22.
Der Statikmischer 14 weist eine Kupplungspartie 26 auf, die in die Kupplungsein richtung 20 eingreift und lösbar an dieser fixiert ist. Der Statikmischer 14 weist zudem ein Mischrohr 28 auf, das sich von einem Materialeinlass 30 an seinem ersten Ende bis zu einem Materialauslass 32 an seinem zweiten Ende erstreckt. Das Mischrohr ist am Materialeinlass 30 aufgeweitet und kommuniziert dort mit den Dosierventilen 18. Am Materialauslass 32 ist es konisch verengt. Es weist ein den Materialeinlass 30 und den Materialauslass 32 aufweisendes Innenrohr 34 aus Kunststoff auf, in dem eine Mischwendel 36 angeordnet ist. Zudem weist es ein Stützrohr 38 aus Metall auf, das sich über den größten Teil der Länge des Innenrohrs 34 erstreckt und an dessen äußerer Mantelfläche anliegt. Beim Auf trag des zweikomponentigen Klebstoffs werden die beiden Komponenten (Basis komponente und Härter) jeweils mittels eines der Dosierventile 18 dosiert in den Materialeinlass 30 abgegeben und der Mischwendel 36 zugeführt. In der Mischwendel 36 vermischen sich die beiden Komponenten auf ihrem Weg zum Materialauslass 32. The static mixer 14 has a coupling part 26 which engages in the coupling device 20 and is releasably fixed thereto. The static mixer 14 also has a mixing tube 28 which extends from a material inlet 30 at its first end to a material outlet 32 at its second end. The mixing tube is widened at the material inlet 30 and communicates there with the metering valves 18. At the material outlet 32 it is conically narrowed. It has an inner tube 34 made of plastic, which has the material inlet 30 and the material outlet 32 and in which a mixing helix 36 is arranged. In addition, it has a support tube 38 made of metal, which extends over the greater part of the length of the inner tube 34 and rests on its outer jacket surface. When the two-component adhesive is applied, the two components (base component and hardener) are each metered into the material inlet 30 by means of one of the metering valves 18 and fed to the mixing helix 36. In the Mixing helix 36, the two components mix on their way to material outlet 32.
Durch die Dosiereinheit 12 verlaufen zwei Zuleitungskanäle 48, die jeweils in den Materialeinlass 30 münden und an den Ventilsitzen 22 mittels der Ventilnadeln 24 sperrbar und freigebbar sind. Jeder der Zuleitungskanäle 48 dient dem Zuleiten eines der beiden Komponenten. In jedem der Zuleitungskanäle 48 befindet sich auf der dem Statikmischer 14 abgewandten Seite des jeweiligen Ventilsitzes 22, also in Fließrichtung der Komponenten vor dem jeweiligen Ventilsitz 22, an der mit dem Bezugszeichen 50 bezeichneten Stelle ein nicht im Detail dargestellter Drucksensor, mit dem der Druck im jeweiligen Zuleitungskanal 48 gemessen wer den kann. Die Messwerte der Drucksensoren 50 werden in einer nicht näher dar gestellten Auswerteeinrichtung ausgewertet. Two feed channels 48 run through the metering unit 12, each of which opens into the material inlet 30 and can be blocked and released at the valve seats 22 by means of the valve needles 24. Each of the supply channels 48 is used to supply one of the two components. In each of the supply ducts 48, on the side of the respective valve seat 22 facing away from the static mixer 14, i.e. in the direction of flow of the components in front of the respective valve seat 22, a pressure sensor (not shown in detail) with which the pressure in the respective supply channel 48 measured who can. The measured values of the pressure sensors 50 are evaluated in an evaluation device which is not shown in detail.
Der Auftrag des Klebstoffs erfolgt volumengesteuert, wobei stets eine vorgegebe ne Menge bzw. ein vorgegebenes Volumen jeder der beiden Komponenten pro Zeiteinheit in den Statikmischer 14 eingeleitet wird. In Fig. 2 ist für einen typi schen Materialauftrag der Druck in den Zuleitungskanälen 48 über der Zeitachse 46 aufgetragen. Solche Materialaufträge werden meist, wenn eine Vielzahl von identischen Werkstücken beschichtet werden, betreffend den Materialfluss in den Zuleitungskanälen 48 identisch wiederholt und weisen daher, sofern die Vorrich tung 10 nicht verändert wird, im Wesentlichen identische Druckverläufe auf. Ge mäß Fig. 2 folgt auf einen Auftragsstart 52 eine Spülphase 54, während der Restmaterial aus dem Statikmischer 14 in einen Abfallbehälter gespült wird. Dem entsprechend steigt in beiden Zuleitungskanälen 48 der Druck kurzzeitig an, bis teilweise bereits vernetzter bzw. ausgehärteter Klebstoff aus dem Mischrohr 28 herausgespült worden ist. An die Spülphase 54 schließt sich eine erste Warte phase 56 an, während der die Auftragsvorrichtung 10 mittels eines Roboters zu einem Werkstück bewegt wird, und während der beide Dosierventile 18 geschlos sen sind. An die erste Wartephase 56 schließt sich die Auftragsphase 58 an, während der beide Dosierventile 18 geöffnet sind und Material auf ein Werkstück aufgetragen wird. Auf die Auftragsphase 58 folgt eine zweite Wartephase 60, während der die Dosierventile 18 wiederum geschlossen sind, um das mit Kleb stoff beschichtete Werkstück abzutransportieren und durch ein unbeschichtetes Werkstück zu ersetzen, welche zu einem Auftragsende 62 endet. An die zweite Wartephase 60, während der noch Basiskomponente in die Dosiereinheit 12 ge pumpt wird, so dass deren druckkurve 64 nicht auf Null abfällt, schließt dann die Spülphase 54 eines nachfolgenden Materialauftrags an. Über der Zeitachse 46 sind dabei die Druckkurve 64 der Basiskomponente und die Druckkurve 66 des Härters aufgetragen. The application of the adhesive is volume-controlled, with a given amount or a given volume of each of the two components being introduced into the static mixer 14 per unit of time. In Fig. 2, the pressure in the supply channels 48 is plotted over the time axis 46 for a typical application of material. Such material applications are mostly repeated identically when a large number of identical workpieces are coated with regard to the material flow in the supply channels 48 and therefore have essentially identical pressure profiles, provided that the device 10 is not changed. According to FIG. 2, an order start 52 is followed by a rinsing phase 54, while the residual material is rinsed from the static mixer 14 into a waste container. Accordingly, the pressure rises briefly in both supply ducts 48 until partially crosslinked or cured adhesive has been flushed out of the mixing tube 28. The rinsing phase 54 is followed by a first waiting phase 56, during which the application device 10 is moved to a workpiece by means of a robot, and during which both metering valves 18 are closed. The first waiting phase 56 is followed by the application phase 58, during which both metering valves 18 are open and material is applied to a workpiece. The order phase 58 is followed by a second waiting phase 60, during which the metering valves 18 are again closed in order to transport away the workpiece coated with adhesive and replace it with an uncoated workpiece which ends at an application end 62. The second waiting phase 60, during which the basic component is still pumped into the metering unit 12 so that its pressure curve 64 does not drop to zero, is followed by the rinsing phase 54 of a subsequent material application. The pressure curve 64 of the basic component and the pressure curve 66 of the hardener are plotted over the time axis 46.
Solange sich die Eigenschaften der Vorrichtung 10 nicht beispielsweise durch Verschleiß oder Zusetzen durch ausgehärtetes Material ändern, und die vorgege benen Volumenströme bei jedem Materialauftrag einen identischen zeitlichen Ver lauf aufweisen, sind die über der Zeitachse 46 aufgetragenen Druckkurven 64, 66 bei jedem Materialauftrag weitgehend identisch. Diese Tatsache macht sich die vorliegende Erfindung zunutze, um den Materialauftrag zu überwachen. Zu die sem Zweck erfolgt vor dem ersten Materialauftrag ein Testauftrag des Materials, der der Generierung von Sollwerten dient. Beim Testauftrag wird zwischen einem Testauftragsstart und einem Testauftragsende, deren zeitlicher Abstand identisch ist mit dem Abstand zwischen dem Auftragsstart 52 und dem Auftragsende 62, Material auf ein Testwerkstück aufgetragen oder einfach nur von der Dosierein heit 12 abgegeben, beispielsweise in einen Abfallbehälter, wobei die Volumen flüsse der Komponenten so gesteuert werden, dass ihr zeitlicher Verlauf identisch ist mit dem zeitlichen Verlauf der Volumenflüsse der nachfolgenden Materialauf träge. Die während des Testlaufs gemessenen Druckkurven, die hier nicht geson dert dargestellt werden, aber im Wesentlichen den in Fig. 2 gezeigten Druckkur ven 64, 66 entsprechen, werden in einem Datenspeicher der Auswerteeinrichtung gespeichert. Sie dienen als Sollwerte, mit denen die Druckkurven 64, 66 der fol genden Materialaufträge verglichen werden. Dabei werden die in den Zuleitungs kanälen 48 gemessenen Drücke mit dem während des Testlaufs zum selben Zeit punkt gemessenen Druck verglichen. Zum selben Zeitpunkt bedeutet, dass dieser Zeitpunkt vom jeweiligen Auftragsstart 52 um dieselbe Zeitspanne entfernt liegt wie der Messzeitpunkt des zu vergleichenden Sollwerts vom Testauftragsstart. Weicht ein Druckmesswert oder eine gesamte Druckkurve 64, 66 zu stark vom vergleichbaren Sollwert bzw. der vergleichbaren Sollkurve ab, ist dies ein Zeichen dafür, dass die Vorrichtung 10 einer Überprüfung unterzogen werden muss. Dabei ist eine in der Zeichnung nicht dargestellte Signaleinrichtung vorgesehen, die ei nen Grad der Abweichung darstellt und dem Benutzer geeignete Maßnahmen nahelegt, wie beispielsweise eine genauere Überwachung durchzuführen oder die Vorrichtung zum Zwecke der Überprüfung oder Wartung stillzulegen. As long as the properties of the device 10 do not change, for example due to wear or clogging by hardened material, and the specified volume flows have an identical temporal course for each material application, the pressure curves 64, 66 plotted over the time axis 46 are largely identical for each material application. The present invention makes use of this fact to monitor the material application. For this purpose, a test application of the material is carried out before the first material application, which is used to generate target values. During the test order, between a test order start and a test order end, the time interval between which is identical to the distance between the order start 52 and the order end 62, material is applied to a test workpiece or is simply dispensed from the dosing unit 12, for example into a waste container, whereby the volume flows of the components are controlled in such a way that their chronological sequence is identical to the chronological sequence of the volume flows of the subsequent material orders. The pressure curves measured during the test run, which are not shown separately here, but essentially correspond to the pressure curves 64, 66 shown in FIG. 2, are stored in a data memory of the evaluation device. They serve as setpoints with which the pressure curves 64, 66 of the fol lowing material orders are compared. The pressures measured in the supply ducts 48 are compared with the pressure measured at the same point in time during the test run. At the same point in time means that this point in time is removed from the respective job start 52 by the same time span as the measurement time of the setpoint to be compared from the test job start. If a pressure measured value or an entire pressure curve 64, 66 deviates too much from the comparable setpoint value or the comparable setpoint curve, this is a sign that the device 10 must be subjected to a check. A signaling device, not shown in the drawing, is provided, which represents a degree of deviation and suggests suitable measures to the user, such as carrying out more precise monitoring or shutting down the device for the purpose of checking or maintenance.
Zusammenfassend ist folgendes festzuhalten: Die Erfindung betrifft unter ande rem ein Verfahren zum Überwachen einer Vorrichtung 10 zum Aufträgen eines mindestens zweikomponentigen viskosen Materials auf Werkstücke, welche eine Dosiereinheit 12 mit einer der Zahl der Komponenten des viskosen Materials ent sprechenden Zahl von Dosierventilen 18 sowie einen an der Dosiereinheit 12 lös bar befestigten Statikmischer 14 zum Durchmischen der Komponenten aufweist, wobei der Statikmischer 14 einen der Dosiereinheit 12 zugewandten Materialein lass 30 und einen der Dosiereinheit 12 abgewandten Materialauslass 32 aufweist und wobei jedes Dosierventil 18 einen an einem Ventilsitz 22 verschließbaren Zuleitungskanal 48 zum Zuleiten der jeweiligen Komponente zum Statikmischer 14 aufweist, wobei nacheinander eine Anzahl Materialaufträge durchgeführt wer den, die jeweils einen identischen vorbestimmten zeitlichen Ablauf zwischen ei nem Auftragsstart 52 und einem Auftragsende 62 aufweisen, wobei den Material aufträgen mindestens ein Testlauf vorangeht, bei dem Material von der Dosie reinheit 12 abgegeben und beispielsweise auf ein Testwerkstück aufgetragen wird, und der zwischen einem Testauftragsstart und einem Testauftragsende den selben zeitlichen Ablauf wie die Materialaufträge aufweist, und während dessen an mehreren vorbestimmten Messzeitpunkten zwischen dem Testauftragsstart und dem Testauftragsende in mindestens einem der Zuleitungskanäle 48 mittels eines Drucksensors 50 der Druck gemessen und dokumentiert wird, und wobei während der Materialaufträge zwischen dem Auftragsstart 52 und dem Auftrags ende 62 an denselben vorbestimmten Zeitpunkten wie im Testlauf der Druck im selben Zuleitungskanal 48 gemessen wird und die Druckmesswerte der Material- aufträge mit den entsprechenden Druckmesswerten des Testlaufs verglichen werden. In summary, the following can be stated: The invention relates, among other things, to a method for monitoring a device 10 for applying an at least two-component viscous material to workpieces, which has a metering unit 12 with a number of metering valves 18 corresponding to the number of components of the viscous material and a the metering unit 12 has releasably attached static mixer 14 for mixing the components, the static mixer 14 having a material inlet 30 facing the metering unit 12 and a material outlet 32 facing away from the metering unit 12, and each metering valve 18 having a feed channel 48 that can be closed at a valve seat 22 of the respective component to the static mixer 14, a number of material orders being carried out one after the other, each having an identical predetermined time sequence between an order start 52 and an order end 62, the mat erial orders is preceded by at least one test run in which material is dispensed from the dosing unit 12 and applied to a test workpiece, for example, and which has the same timing as the material orders between a test order start and a test order end, and during which at several predetermined measuring times between the Test order start and test order end in at least one of the supply channels 48, the pressure is measured and documented by means of a pressure sensor 50, and during the material orders between the order start 52 and the order end 62 at the same predetermined times as in the test run, the pressure in the same supply channel 48 is measured and the pressure readings of the material orders are compared with the corresponding pressure readings from the test run.

Claims

Ansprüche Expectations
1. Verfahren zum Überwachen einer Vorrichtung (10) zum Aufträgen eines mindestens zweikomponentigen viskosen Materials auf Werkstücke, welche eine Dosiereinheit (12) mit einer der Zahl der Komponenten des viskosen Materials entsprechenden Zahl von Dosierventilen (18) sowie einen an der Dosiereinheit (12) lösbar befestigten Statikmischer (14) zum Durchmischen der Komponenten aufweist, wobei der Statikmischer (14) einen der Dosie reinheit (12) zugewandten Materialeinlass (30) und einen der Dosiereinheit (12) abgewandten Materialauslass (32) aufweist und wobei jedes Dosierven til (18) einen an einem Ventilsitz (22) verschließbaren Zuleitungskanal (48) zum Zuleiten der jeweiligen Komponente zum Statikmischer (14) aufweist, wobei nacheinander eine Anzahl Materialaufträge durchgeführt werden, die jeweils einen identischen vorbestimmten zeitlichen Ablauf zwischen einem Auftragsstart (52) und einem Auftragsende (62) aufweisen, dadurch gekennzeichnet, dass während der Materialaufträge zwischen dem Auftrags- Start (52) und dem Auftragsende (62) an vorbestimmten Zeitpunkten der1. A method for monitoring a device (10) for applying an at least two-component viscous material to workpieces, which has a metering unit (12) with a number of metering valves (18) corresponding to the number of components of the viscous material and one on the metering unit (12) has releasably attached static mixer (14) for mixing the components, the static mixer (14) having a material inlet (30) facing the metering unit (12) and a material outlet (32) facing away from the metering unit (12), and wherein each metering valve (18 ) has a feed channel (48) which can be closed on a valve seat (22) for feeding the respective component to the static mixer (14), a number of material orders being carried out one after the other, each of which has an identical predetermined time sequence between an order start (52) and an order end ( 62), characterized in that during the material applications between the order start (52) and the order end (62) at predetermined times of the
Druck in mindestens einem der Zuleitungskanäle (48) mittels eines Druck sensors (50) und vorzugsweise in allen Zuleitungskanälen (48) mittels je weils eines Drucksensors (50) gemessen wird. Pressure in at least one of the supply ducts (48) is measured by means of a pressure sensor (50) and preferably in all supply ducts (48) by means of a pressure sensor (50) each.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Druck- messwerte der Materialaufträge mit gespeicherten Sollwerten verglichen werden. 2. The method according to claim 1, characterized in that the pressure measured values of the material orders are compared with stored nominal values.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass den Material aufträgen mindestens ein Testlauf vorangeht, bei dem Material von der Do siereinheit (12) abgegeben und beispielsweise auf ein Testwerkstück aufge tragen wird, und der zwischen einem Testauftragsstart und einem Testauf- tragsende denselben zeitlichen Ablauf wie die Materialaufträge aufweist, und während dessen an denselben vorbestimmten Messzeitpunkten zwi schen dem Testauftragsstart und dem Testauftragsende wie bei den Materi alaufträgen in mindestens einem der Zuleitungskanäle (48) mittels eines Drucksensors (50) der Druck gemessen und dokumentiert wird und dass die Druckmesswerte der Materialaufträge mit den entsprechenden Druckmess werten des Testlaufs verglichen werden. 3. The method according to claim 2, characterized in that the material orders are preceded by at least one test run in which the material is dispensed from the dosing unit (12) and, for example, applied to a test workpiece, and the same between a test order start and a test order end time sequence as the material orders, and during which the pressure is measured and documented by means of a pressure sensor (50) at the same predetermined measuring times between the test order start and the test order end as in the case of the material orders in at least one of the supply channels (48) and that the pressure measurement values of the material orders can be compared with the corresponding pressure measurement values of the test run.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass während des Testlaufs an mehreren vorbestimmten Messzeitpunkten zwischen dem Tes tauftragsstart und dem Testauftragsende in jedem der Zuleitungskanäle (48) mittels jeweils eines Drucksensors (50) der Druck gemessen und dokumen tiert wird, und wobei während der Materialaufträge zwischen dem Auftrags start (52) und dem Auftragsende (62) an denselben vorbestimmten Zeitpunk ten wie im Testlauf der Druck in jedem Zuleitungskanal (48) gemessen wird und für jeden der Zuleitungskanäle (48) die Druckmesswerte der Material- aufträge mit den entsprechenden Druckmesswerten des Testlaufs verglichen werden. 4. The method according to claim 3, characterized in that during the test run at several predetermined measuring times between the test order start and the test order end in each of the supply channels (48) by means of a pressure sensor (50), the pressure is measured and documented benefits, and during of the material orders between the order start (52) and the order end (62) at the same predetermined time points as in the test run the pressure in each supply channel (48) is measured and for each of the supply channels (48) the pressure readings of the material orders with the corresponding Pressure readings of the test run are compared.
5. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Druck im jeweiligen Zuleitungskanal (48) beim Testlauf und beim Material auftrag jeweils zu diskreten Zeitpunkten gemessen wird. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass der Druck im jeweiligen Zuleitungskanal (48) beim Testlauf und beim Materialauftrag in konstanten Zeitabständen gemessen wird. 5. The method according to claim 3 or 4, characterized in that the pressure in the respective supply channel (48) is measured during the test run and the material order in each case at discrete times. 6. The method according to claim 5, characterized in that the pressure in the respective supply duct (48) is measured at constant time intervals during the test run and during the application of material.
7. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Druck im jeweiligen Zuleitungskanal (48) beim Testlauf und/oder beim Materialauftrag jeweils kontinuierlich gemessen wird. 7. The method according to any one of the preceding claims, characterized in that the pressure in the respective supply channel (48) is measured continuously during the test run and / or during the application of material.
8. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekenn- zeichnet, dass der Druck im jeweiligen Zuleitungskanal (48) in Fließrichtung der betreffenden Komponente vor dem Ventilsitz (22) gemessen wird. 8. The method according to any one of the preceding claims, characterized in that the pressure in the respective feed channel (48) is measured in the flow direction of the relevant component in front of the valve seat (22).
9. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass eine Signaleinrichtung ein Warnsignal erzeugt, wenn einer oder mehrere Druckmesswerte eines Materialauftrags um mehr als eine vor- bestimmte Toleranz von dem oder den entsprechenden Sollwert(en) bzw. von dem oder den entsprechenden Druckmesswert(en) des Testlaufs ab weicht bzw. abweichen. 9. The method according to any one of the preceding claims, characterized in that a signal device generates a warning signal when one or more pressure measurement values of a material application by more than a predetermined tolerance of the corresponding setpoint (s) or of the corresponding Pressure measurement value (s) of the test run deviates or deviate.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Warnsig nal in Abhängigkeit von der Größe der Abweichung variiert wird. 11. Vorrichtung zum Aufträgen eines mindestens zweikomponentigen viskosen10. The method according to claim 9, characterized in that the warning signal is varied as a function of the size of the deviation. 11. Device for applying an at least two-component viscous
Materials auf Werkstücke, welche eine Dosiereinheit (12) mit einer der Zahl der Komponenten des viskosen Materials entsprechenden Zahl von Dosier ventilen (18) sowie einen an der Dosiereinheit (12) lösbar befestigten Sta tikmischer (14) zum Durchmischen der Komponenten aufweist, wobei der Statikmischer (14) einen der Dosiereinheit (12) zugewandten MaterialeinlassMaterial on workpieces which has a metering unit (12) with a number of metering valves (18) corresponding to the number of components of the viscous material and a static mixer (14) releasably attached to the metering unit (12) for mixing the components, the Static mixer (14) has a material inlet facing the metering unit (12)
(30) und einen der Dosiereinheit (12) abgewandten Materialauslass (32) aufweist und wobei jedes Dosierventil (18) einen an einem Ventilsitz (22) verschließbaren Zuleitungskanal (48) zum Zuleiten der jeweiligen Kompo nente zum Statikmischer (14) aufweist, dadurch gekennzeichnet, dass in mindestens einem der Zuleitungskanäle (48) ein Drucksensor (50) zum(30) and a material outlet (32) facing away from the dosing unit (12) and wherein each dosing valve (18) has a feed channel (48) closable on a valve seat (22) for feeding the respective component to the static mixer (14), characterized that in at least one of the supply channels (48) a pressure sensor (50) for
Messen des Drucks der betreffenden Komponente angeordnet ist. Measuring the pressure of the component in question is arranged.
12. Vorrichtung nach Anspruch 11 , gekennzeichnet durch eine Auswerteein richtung zur Auswertung der Messwerte des mindestens einen Drucksensors (50), welche einen Datenspeicher zur Speicherung der Messwerte aufweist. 12. The device according to claim 11, characterized by an evaluation device for evaluating the measured values of the at least one pressure sensor (50), which has a data memory for storing the measured values.
13. Vorrichtung nach Anspruch 12, gekennzeichnet durch eine Signaleinrich tung zur Erzeugung von Warnsignalen in Abhängigkeit von den von der Auswerteeinrichtung ausgewerteten Messwerten. 13. The device according to claim 12, characterized by a Signaleinrich device for generating warning signals as a function of the measured values evaluated by the evaluation device.
EP20736253.4A 2019-08-07 2020-06-16 Monitoring method and application device for a multi-component viscous material Active EP3983135B1 (en)

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DE102019121347.9A DE102019121347A1 (en) 2019-08-07 2019-08-07 Monitoring process and application device for multi-component viscous material
PCT/EP2020/066596 WO2021023419A1 (en) 2019-08-07 2020-06-16 Monitoring method and application device for a multi-component viscous material

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EP3983135B1 (en) 2023-06-14
CN114206510A (en) 2022-03-18
DE102019121347A1 (en) 2021-02-11
US20220274076A1 (en) 2022-09-01
WO2021023419A1 (en) 2021-02-11
KR20220039727A (en) 2022-03-29

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