EP2589437B1 - Method for detecting failures and for recording the valve stroke of a glue valve - Google Patents

Method for detecting failures and for recording the valve stroke of a glue valve Download PDF

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Publication number
EP2589437B1
EP2589437B1 EP12007283.0A EP12007283A EP2589437B1 EP 2589437 B1 EP2589437 B1 EP 2589437B1 EP 12007283 A EP12007283 A EP 12007283A EP 2589437 B1 EP2589437 B1 EP 2589437B1
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EP
European Patent Office
Prior art keywords
valve
glue
coil
values
current
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.)
Active
Application number
EP12007283.0A
Other languages
German (de)
French (fr)
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EP2589437A3 (en
EP2589437A2 (en
Inventor
Ralf Barkmann
Wolfgang Rohwedder
Marc-Daniel Stegen
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.)
Focke and Co GmbH and Co KG
Original Assignee
Focke and Co GmbH and Co KG
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Filing date
Publication date
Application filed by Focke and Co GmbH and Co KG filed Critical Focke and Co GmbH and Co KG
Publication of EP2589437A2 publication Critical patent/EP2589437A2/en
Publication of EP2589437A3 publication Critical patent/EP2589437A3/en
Application granted granted Critical
Publication of EP2589437B1 publication Critical patent/EP2589437B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3053—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a solenoid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • 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
    • B05C11/1034—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves specially designed for conducting intermittent application of small quantities, e.g. drops, of coating 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm

Definitions

  • the present invention relates to a method for detecting disturbances of a glue valve and a method for detecting the valve lift of a glue valve.
  • glue valves are used in the manufacture and / or packaging of cigarettes or other smokable items. For example, with the glue valves individual areas of blanks of cigarette packs can be glued together or with separate or separate blanks.
  • glue valves Another problem with such glue valves is the correct specification of the valve lift.
  • a stroke limiter for the movable closure member of the valve for setting the valve lift can be set manually. This often serves a suitable adjustment of the stroke limiter.
  • the set angle of rotation of the adjusting screw is a measure of the valve lift. As part of this adjustment process, it is often difficult to check if or when the correct angle of rotation of the screw is set. Because even slight changes in the angle of rotation can change the valve lift from a permissible to an impermissible value.
  • the valve has an at least partially, preferably made entirely of magnetizable material component whose position for adjusting the valve lift by movement of the component relative to a by an electromagnet the valve movable closure member is changeable.
  • this position is preferably also or in particular in the case of a non-moving closure member, for example in a stationary opening or closing position of the same, relative to the closure member by a particular manual setting operation changeable.
  • the component is usually a Ventilhubbegrenzer or a component thereof. It is arranged such that it is located in the magnetic influence of the solenoid of the valve. It is preferably arranged at least in regions within the coil of the same, so at least in this area surrounded by this, quasi in the manner of a core of the same. In any case, at least one or the magnetizable region thereof is preferably arranged in the coil.
  • the actual inductance value of the coil of the electromagnet is then measured as a measure of the position or position of the component relative to the closure member and thus as a measure of the particular manually set valve lift.
  • the measurement of the actual inductance value is preferably carried out when the valve is closed, ie in a closed position of the closure member of the valve.
  • Such a method can be used, for example, in glue valves which are part of a device for producing and / or packaging cigarettes or other smokable objects.
  • the method can basically be used regardless of whether the glue valve or possibly the manufacturing device to which it is associated is in operation or not.
  • the method according to the invention can advantageously be used to monitor the previously set valve lift of the respective glue valve in the production process or in the operation of a glue valve or manufacturing device in operation.
  • the glue valve is cyclically operated in the manufacturing process with Beleimungsphasen in which glue is opened to dispense glue, and rest periods in which the valve is closed so that no glue leaks, wherein the actual values of the coil inductance in at least one of the rest phases of the glue valve be determined.
  • the actual inductance values of the valve are determined by, in particular during the rest phase of the valve, a suitable, in particular variable in the measuring current, usually an alternating current, is passed through the at least one coil.
  • a suitable, in particular variable in the measuring current usually an alternating current
  • the measuring current can be caused for example by a suitable resonant circuit, wherein the coil is part of the resonant circuit during the measurement.
  • a first, preferably optical signal can be generated, which represents a valve lift value permissible for the glue valve, or a second, which differs from the first
  • an optical signal representing a valve stroke value that is not allowed for the glue valve.
  • the measured actual value of the coil inductance or a value which is preferably linearly dependent thereon can in particular be visually displayed, preferably on a screen.
  • the actual values of the temperature of the glue valve or the actual values of a measured variable from which the actual temperature values of the glue valve can be derived can be determined within a running production process, in particular a packaging process, by a glue valve. The determination of these actual values takes place multiple times, for example continuously or from time to time, during the ongoing production process. The determined actual values are then evaluated with regard to a malfunction of the glue valve - also automatically. For this purpose, the actual values are preferably compared with corresponding desired or limit values stored for the glue valve and / or with corresponding actual values of at least one other glue valve operating or operating within the current production process.
  • such a method is used in glue valves that are part of an operating device for the manufacture and / or packaging of cigarettes or other smokable objects.
  • a preferred measurement variable, from which the actual temperature of the glue valve can be derived in principle, and whose actual values can be determined, is the resistance of at least one coil of an electromagnet of the valve used for actuating a closure member of the valve. It was recognized that the respective actual value of the coil resistance is a good measure of the glue valve temperature.
  • the glue valve is preferably operated discontinuously, in particular intermittently, with operating phases, namely gluing phases, in which the glue valve is open to dispense glue, and with operating phases, namely resting, in which the valve is closed, so that no glue leaks out.
  • operating phases namely gluing phases
  • resting in which the valve is closed
  • target values of the measured variable from which the temperature can be derived, and / or the temperature set values and / or the setpoint values of the coil inductance and / or the table or the graph, in the coil resistance value (s), can be temperature values of the noise valve are assigned to be read from a arranged on the valve transponder.
  • Gluing valves 10 shown are part of a gluing system 25 according to the invention (cf. Fig. 2 ), which in turn is part of a device, not shown, for the production of cigarettes or packaging for these cigarettes or part of a device for producing and / or packaging cigarettes.
  • Such devices may be machines such as a maker, a packaging machine for making the actual cigarette packs (packer), a film wrapping machine (cello), a bar packer, a carton packer or a palletizer, or the like.
  • the glue valves 10 are known in their basic structure in parts, for example from the DE 10 2009 022 496.3 ,
  • Such a glue valve 10 comprises a valve housing 11 and a plug housing 12 fastened thereto.
  • the glue valve 10 has an electromagnet 14.
  • the electromagnet 14 is arranged in a valve housing interior 13.
  • a plurality of electromagnets 14 can also be used.
  • the electromagnet 14 has a coil 15 with individual windings.
  • the coil 15 is wound on a bobbin 16.
  • the bobbin 16 is part of a valve chamber 17. On such a bobbin 16 can of course also be dispensed with, so that the coil 15 would be designed to be self-supporting in such a case.
  • a closing or metering device 18 of the valve 10 is movably arranged, in the present case a valve lifter.
  • a closure means 20 is arranged, in this case a ball.
  • the closure means 20 is associated with a valve opening 21.
  • the valve opening 21 is located centrally in the region of a funnel-shaped valve seat 22.
  • the closure means 20 is in the closed position of the valve 10 on conical seating surfaces of the valve seat 22 at.
  • a glue connection 23 can be the glue valve 10 to be metered glue from the in Fig. 2 shown glue source 24 of the gluing system 25 are supplied by glue lines 24a. From the glue connection 23, the glue is first guided along a glue channel 26 of the glue valve 10 and then into the valve chamber 17 via connecting channels 27 leaving it.
  • the closure member 18 can be opened by suitable loading of the electromagnet 14 with electric current, so that glue can escape from the valve chamber 17.
  • the coil 15 of the electromagnet 14 surrounds the closure member 18 at least in sections.
  • the closure member 18 is preferably permanently urged in the closing direction by a closing force of a closing means or closing member.
  • This is formed in the present embodiment as a two individual magnets comprehensive permanent magnet which exerts a permanent magnetic force on the closure member 18 in the sense of a closing movement.
  • suitable closing forces exerting closing means may be used, such as (return) springs or the like.
  • One of the individual magnets of the permanent magnet is arranged at the free end or on a head part 32 of a magnetizable, metallic component 29 whose position is relative to the closure member 18 in the manner to be explained in more detail below the valve lift.
  • the free lower end or the head part 32 of the component 29 is opposite the free upper end of the piston piece 28 of the closure member 18.
  • the other single magnet of the permanent magnet is the individual magnet of the head portion 32 opposite to the closure member 18 and attached to the free end of the piston piece 28.
  • the individual magnets have in the present case even when the glue valve 10 is open a (small) distance from each other.
  • the opposing individual magnets are positioned so that like poles are facing each other, for example, the north poles of the same.
  • a repulsive force is permanently transmitted to the closure member 18, namely the above-mentioned closing force.
  • the magnetic opening force acting on the closure member 19 opposite this closing force is generated which overcomes the closing force and is correspondingly larger during the opening operation ,
  • the magnetizable component 29 forms - as already indicated above - together with the individual magnets an adjustable stroke limiter for the closure member 18, which limits the length of the path by which the closure member 18 during the opening movement in the valve chamber 17 can be moved maximally upward.
  • the closure member 18 is moved by the opening force applied by the electromagnet 14 so far up in the direction of the magnetizable member 29 or the component 29, in this case the head portion 32 thereof, so far approximated until the repulsive magnetic force between the Single magnet of the upward or acting on the closure member 18 opening force corresponds to or exceeds this.
  • At which position of the closure member 18, that is at which value of the Ventilhubs this is the case depends inter alia significantly on the position of the component 29 and the head part 32 thereof.
  • This position of the component 29 is variable to adjust the valve lift relative to the closure member 18 and to the valve chamber 17 by the component 29 is moved by a manual adjustment either in the direction of the closure member 18 further down or in the opposite direction further upwards ,
  • the component 29 has in the upper area, i. above the head portion 32, via a threaded portion 30 and an adjusting screw.
  • the adjusting screw 30 is adjustable in a fixed support 31 of the valve 10 with a corresponding internal thread in the longitudinal direction.
  • a recess is provided at the free upper end of the adjusting screw 30, for applying a tool, for example a hexagon socket wrench.
  • the entire component 29 can be moved by rotation of the adjusting screw by means of the tool about its longitudinal axis depending on the direction of rotation either further up or further down.
  • all glue valves 10 are controlled by means of a master controller 33 of the gluing system 25 and by subordinate or local controllers 36 connected to the master controller 33 via control lines 35, which are respectively connected to the superordinate master controller 33.
  • Each glue valve 10 is assigned a local controller 36 in each case.
  • the master controller 33 of the gluing system 25 is connected via a control line 34 to a higher-level central machine control.
  • the master controller 33 would be connected to the central machine control of this packaging machine.
  • the local controllers 36 each receive control parameters from the master controller 33 of the gluing system 25, by means of which the local controllers 36 carry out the individual control of the valves 10. Details of a possible Control technology, for example, in the DE 10 2009 029 821.5 discloses the content of which is incorporated into the present application.
  • the opening and closing movements of the glue valves 10 are controlled or optionally regulated by the controllers 33, 36.
  • the movements of the closure member 18 of each valve 10 are achieved by applying the electromagnet 14 and the coil 15 of the corresponding valve 10 with a suitable control current.
  • the local controllers 36 have suitable current or voltage sources or suitable amplifiers and are each connected by means of power lines 37 to the valves 10.
  • valves 10 can be controlled, for example, such that they can cyclically provide individual blanks of cigarette packs with corresponding glue portions, for example during operation of a packaging machine.
  • control is used unifying in the context of this application, regardless of whether control or regulatory operations are described.
  • controller With the aid of one or more of the described controllers, hereinafter referred to collectively as "controller”, recognition or monitoring methods which are important for the invention can be implemented.
  • each set valve lift each glue valve 10 of the gluing system 25 automatically detected and displayed.
  • the control detects in each case the actual inductance value of the coil 15 of the electromagnet 14 of the valve 10.
  • This inductance value is significantly influenced inter alia by the position of the component 29, in particular the head 32 thereof, relative to the coil 15.
  • the lower the component 29 in the valve 10th That is, the more it is immersed in the coil interior, the greater the measurable current inductance value of the coil 15. Since the position of the component 29 in turn directly influences the valve lift, the actual value of the coil inductance is thus a measure of the set valve lift ,
  • the controller can determine in the course of this, for example, whether the currently set valve lift has a permissible value and, for example - if this is not the case - generate an error signal.
  • the controller could display, for example, in the set-up mode, a setter, in particular optically, the valve lift manually set by means of the adjusting screw 30 or a measure for the latter, preferably optically on a suitable screen.
  • a setter in particular optically, the valve lift manually set by means of the adjusting screw 30 or a measure for the latter, preferably optically on a suitable screen.
  • the measured value of the coil inductance can be displayed directly, or a value which is particularly linearly dependent on this value and which is a measure of the valve lift.
  • a first signal is generated which represents a valve stroke value permissible for the glue valve, or a second, different signal which represents a valve stroke value which is not permissible for the glue valve.
  • a first and a second lighting means 39a, 39b are respectively arranged on the local controllers 36, for example a green signal light and a red signal light.
  • the green signal lamp 39a lights up
  • the red signal lamp 39b lights up.
  • control can expediently compare these actual values with reference values stored for the glue valve or with limit values stored for the glue valve.
  • the corresponding values can, for example, be stored in suitable digital data memories of the controller.
  • Fig. 5 shows the dependence of the coil inductance of the rotation angle a, which is a measure of the position of the adjusting screw 30 of the component 29.
  • the increasing ⁇ values then correspond to angles of rotation about which the adjusting screw 30 is rotated about its longitudinal axis, starting from the 0 ° position, in order to move the component 29 further upwards from the lower end position, thereby increasing the valve lift.
  • an angle range 38 is shown in hatched form in which, according to the above, the values of the coil inductances relative to the respective glue valve 10 assume permissible values, so that, if values were measured, the green lamp 39a would light up.
  • the set valve lift is at the corresponding rotational angles of the adjusting screw 30 in an allowable range.
  • the inductance values and thus the corresponding valve lift values are classified as inadmissible.
  • the red lamp 39b would light up.
  • the values for the lower allowable limit of the inductance and for the upper allowable limit, respectively, are smaller than those of the valves 10 represented by the curves C, D be represented.
  • the controller can correspondingly generate an error signal.
  • This error signal would indicate that at least one of the glue valves is faulty.
  • the measurement of the actual inductance values is preferably carried out during operation of the valve 10, for example during a rest phase thereof, in which the closure member 18 is in the closed position.
  • One possibility of the measurement is to conduct a suitable measuring current, in particular an alternating current, through the coil 15 with the aid of a suitable oscillating circuit circuit. With the aid of this measuring current, the inductance value of the coil 15 can then be determined in a manner known per se.
  • Fig. 6 For example, a diagram illustrating the time-dependent current flow through a glue valve 10 during operation thereof is shown. According to the example of Fig. 6 the coil 15 is applied periodically or cyclically with identical currents. The curve sections A and A 'represent the successive phases of operation of the glue valve 10 during operation thereof.
  • the thereby initiated magnetic field of the electromagnet 14 ensures that the closure member 18 is moved in the manner already described above against the closing force of the individual magnets in the longitudinal direction upwards, thus the valve 10 is opened.
  • the valve is then held by means of a so-called holding current, the strength of which is slightly less than the opening opening of the glue valve 10 necessary opening flow.
  • the coil current is continuously reduced to zero or approximately zero, so that the closure member 18 moves back into the closed position.
  • the coil 15 - as already indicated above - corresponding to the current waveforms B and B 'in Fig. 6 subjected to an alternating current of low intensity.
  • the alternating current intensity is chosen so that this causes no unwanted movement of the closure member 18. Much more
  • the alternating current is used as a pure measuring current to measure the inductance of the coil in the resting phase.
  • the controller may automatically detect malfunctions of one or more size valves 10.
  • the actual values of the temperature of the glue valve or the actual values of a measured variable, from which the actual temperature values of the glue valve 10 can be derived are measured during operation of the glue valve 10 and evaluated with regard to a fault.
  • the respective glue valve 10 in its phases of rest accordingly Fig. 6 with measuring currents F, F 'are applied, in particular constant strength (DC). With the aid of these measuring currents, the respective actual resistance of the coil 15 of the valve 10 can be determined.
  • the actual resistance of the coil 15 is a measure of the actual temperature of the glue valve 10.
  • the actual temperature of the glue valve 10 influences the actual coil resistance or the actual coil resistance is dependent on the actual temperature.
  • Fig. 3 shows two characteristic curves or characteristics G, H of the coil resistance for two different size valves 10, depending on the operating time t of the respective glue valve 10. As can be seen, as the glue valve 10 continues to operate, its coil resistance values also increase.
  • the ambient temperature of the glue valves 10 often increases due to heat-emitting units in the vicinity of the glue valves 10, on the other hand heat is generated due to friction processes in the valves 10.
  • the dashed curves G ', H' in Fig. 3 show actual actual curves of the coil resistances. In other words, these curves correspond to the measured values.
  • the actual curve progressions G ', H' deviate upward from the desired or the expected curve progressions G, H, respectively.
  • the deviations are explained by disturbances of the glue valves 10 due to glue contamination within the valves 10, which impedes the flow of glue through the respective glue valve 10.
  • the glue flow basically ensures the removal of water in the manner of a coolant Heat of the Leimventils 10. In case of flow disturbances less heat is removed, accordingly deviates the actual temperature in the glue valve 10 from the setpoints and thus the coil resistance R of the expected curves G, H.
  • the measured actual values As part of the evaluation of the measured coil resistance values, the measured actual values according to the alternative in Fig. 3 generally speaking compared with set for the respective valve 10 setpoints or limits. Insofar as the measured actual values deviate from the desired values or differ by a predetermined amount, the controller 33, 35 outputs an error signal.
  • the stored setpoint or limit values may depend on other detected or measured parameters, such as the operating time of the respective valve or the ambient temperature in the vicinity of the respective glue valve 10.
  • the ambient temperature could be measured, for example, with a corresponding temperature sensor 42, the a control line 43 to the controller, in particular to the higher-level controller 33, is connected.
  • the controller selects the setpoints or limit values necessary for the evaluation of the measured actual values in accordance with the temperature and / or the operating time and / or another parameter from a number of stored setpoint or limit values.
  • the actual values are compared with stored limit values, and that upon reaching the limit value or exceeding the same, the error signal is generated.
  • coil values of the respective glue valve 10 correspond to a temperature which is above a critical limit value. If, as part of the evaluation of the measured resistance values, it results that the actual temperature one of the valves above a critical temperature ⁇ krit . is located, the error signal is generated.
  • the controller compares the actual resistance values of the different glue valves 10 with one another.
  • the actual resistance value R 3 of the glue valve 10 represented by the characteristic curve K corresponds to a temperature value which deviates by a predetermined amount ⁇ from the actual temperature values of the other glue valves 10, which are determined from the resistance values R 1 , R measured correspondingly approximately at the same time 2 or R 4 can be derived using the curves I, J and L.
  • characteristic data for the individual glue valves 10 such as characteristic curves which describe a temperature behavior of the glue valves depending on measured coil resistances or depending on measured coil inductances, rotational angle of an adjusting screw of the valve 10, respectively in the respective valve 10 assigned, in particular arranged on these transponders 40 are deposited. These values can then each be queried by readers 41 connected to the controller and forwarded to the controller.

Landscapes

  • Magnetically Actuated Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Erkennung von Störungen eines Leimventils sowie ein Verfahren zur Erfassung des Ventilhubs eines Leimventils.The present invention relates to a method for detecting disturbances of a glue valve and a method for detecting the valve lift of a glue valve.

In der Zigarettenindustrie werden Leimventile bei der Herstellung und/oder der Verpackung von Zigaretten oder anderen rauchbaren Gegenständen eingesetzt. Beispielsweise können mit den Leimventilen einzelne Bereiche von Zuschnitten von Zigarettenpackungen miteinander verklebt werden oder mit separaten bzw. gesonderten Zuschnitten.In the cigarette industry, glue valves are used in the manufacture and / or packaging of cigarettes or other smokable items. For example, with the glue valves individual areas of blanks of cigarette packs can be glued together or with separate or separate blanks.

Aufgrund der hohen Produktionsgeschwindigkeiten in der Zigarettenindustrie verschmutzen die Leimventile häufig. Die Verschmutzung eines solchen Leimventils wird nur indirekt darüber erkannt, dass das von dem jeweiligen Leimventil erzeugte Leimbild fehlerhaft wird. Falls keine permanente Sichtkontrolle der Leimbilder erfolgt, können bis zur Erkennung der Leimventilverschmutzung schon eine Vielzahl von Packungen mit entsprechend fehlerhafter Verleimung hergestellt worden sein.Due to the high production speeds in the cigarette industry, the glue valves often pollute. The contamination of such a glue valve is only indirectly recognized that the glue pattern generated by the respective glue valve is faulty. If there is no permanent visual inspection of the glue patterns, a large number of packs with correspondingly incorrect gluing may already have been produced up to the detection of the glue valve contamination.

Ein weiteres Problem solcher Leimventile ist die korrekte Vorgabe des Ventilhubs. Bei im Stand der Technik bekannten Leimventilen, beispielsweise wie in DE 10 2009 022 496 A1 gezeigt, kann ein Hubbegrenzer für das bewegbare Verschlussorgan des Ventils zur Vorgabe des Ventilhubs händisch eingestellt werden. Hierzu dient häufig eine geeignete Einstellschraube des Hubbegrenzers. Der eingestellte Drehwinkel der Einstellschraube ist dabei ein Maß für den Ventilhub. Im Rahmen dieses Einstellvorgangs ist es häufig schwierig zu überprüfen, ob oder wann der richtige Drehwinkel der Schraube eingestellt ist. Denn schon geringfügige Drehwinkeländerungen können den Ventilhub von einem zulässigen zu einem unzulässigen Wert überführen.Another problem with such glue valves is the correct specification of the valve lift. In known in the art glue valves, for example as in DE 10 2009 022 496 A1 shown, a stroke limiter for the movable closure member of the valve for setting the valve lift can be set manually. This often serves a suitable adjustment of the stroke limiter. The set angle of rotation of the adjusting screw is a measure of the valve lift. As part of this adjustment process, it is often difficult to check if or when the correct angle of rotation of the screw is set. Because even slight changes in the angle of rotation can change the valve lift from a permissible to an impermissible value.

In dem Dokument 10 2005 041 873 ist gezeigt, einen die Ruheposition eines ein Ventilglied betätigenden, von einem Elektromagneten bewegten Ankers mit Hilfe von Ist-Induktionswerten der Elektromagnetenspule zu ermitteln.In the document 10 2005 041 873 is shown to determine the rest position of a valve member actuated by an electromagnet moving armature by means of actual induction values of the solenoid coil.

Es ist Aufgabe der vorliegenden Erfindung, ein möglichst zuverlässiges Verfahren zur automatischen Erfassung des Ventilhubs eines solchen Leimventils zur Verfügung zu stellen.It is an object of the present invention to provide a reliable method for automatically detecting the valve lift of such a glue valve.

Diese Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1.This object is achieved by a method having the features of claim 1.

Bei dem erfindungsgemäßen Verfahren zur automatischen Erfassung des Ventilhubs gemäß Anspruch 1 des Leimventils wird davon ausgegangen, dass das Ventil ein mindestens bereichsweise, bevorzugt vollständig aus magnetisierbarem Material bestehendes Bauteil aufweist, dessen Position zur Einstellung des Ventilhubs durch Bewegung des Bauteils relativ zu einem durch einen Elektromagneten des Ventils bewegbaren Verschlussorgan veränderbar ist. Dabei ist diese Position bevorzugt auch bzw. insbesondere bei nicht bewegtem Verschlussorgan, beispielsweise in einer ortsfesten Öffnungs- oder Schließstellung desselben, gegenüber dem Verschlussorgan durch einen insbesondere händischen Einstellvorgang veränderbar.In the inventive method for automatically detecting the valve lift according to claim 1 of the glue valve, it is assumed that the valve has an at least partially, preferably made entirely of magnetizable material component whose position for adjusting the valve lift by movement of the component relative to a by an electromagnet the valve movable closure member is changeable. In this case, this position is preferably also or in particular in the case of a non-moving closure member, for example in a stationary opening or closing position of the same, relative to the closure member by a particular manual setting operation changeable.

Das Bauteil ist in der Regel ein Ventilhubbegrenzer oder ein Bauteil desselben. Es ist dabei derart angeordnet, dass es sich in dem magnetischen Einflussbereich des Elektromagneten des Ventils befindet. Es ist bevorzugt mindestens bereichsweise innerhalb der Spule desselben angeordnet, also mindestens in diesem Bereich von dieser umgeben, quasi nach Art eines Kerns desselben. Vorzugsweise ist jedenfalls mindestens ein oder der magnetisierbare Bereich desselben in der Spule angeordnet.The component is usually a Ventilhubbegrenzer or a component thereof. It is arranged such that it is located in the magnetic influence of the solenoid of the valve. It is preferably arranged at least in regions within the coil of the same, so at least in this area surrounded by this, quasi in the manner of a core of the same. In any case, at least one or the magnetizable region thereof is preferably arranged in the coil.

Erfindungsgemäß wird dann als Maß für die Position bzw. Stellung des Bauteils relativ zu dem Verschlussorgan und somit als Maß für den insbesondere händisch eingestellten Ventilhub der Ist-Induktivitätswert der Spule des Elektromagneten gemessen. Die Messung des Ist-Induktivitätswertes erfolgt dabei bevorzugt bei geschlossenem Ventil, also in einer Schließstellung des Verschlussorgans des Ventils.According to the invention, the actual inductance value of the coil of the electromagnet is then measured as a measure of the position or position of the component relative to the closure member and thus as a measure of the particular manually set valve lift. The measurement of the actual inductance value is preferably carried out when the valve is closed, ie in a closed position of the closure member of the valve.

Hintergrund dieses Verfahrens ist die erfindungsgemäße Erkenntnis, dass geringste Positionsänderungen des vorgenannten, mindestens bereichsweise magnetisierbaren Bauteils, dessen Stellung zur Einstellung des Ventilhubs veränderbar ist, in Bezug auf die Erfassung des Ventilhubs auswertbare Änderungen der Induktionswerte der Spule nach sich ziehen. Denn die Positionsänderungen des Bauteils führen zu Änderungen der magnetischen Wechselwirkungen zwischen dem Bauteil und dem Elektromagneten, in dessen Wirkbereich sich das Bauteil befindet.Background of this method is the realization according to the invention that the least changes in position of the aforementioned, at least partially magnetizable component whose position is adjustable to set the valve lift, with respect to the Detection of the valve lift causes evaluable changes in the induction values of the coil. Because the changes in position of the component lead to changes in the magnetic interactions between the component and the electromagnet, in the effective range, the component is located.

Ein solches Verfahren kann beispielsweise angewendet werden bei Leimventilen, die Bestandteil einer Vorrichtung zur Herstellung und/oder Verpackung von Zigaretten oder anderen rauchbaren Gegenständen sind.Such a method can be used, for example, in glue valves which are part of a device for producing and / or packaging cigarettes or other smokable objects.

Das Verfahren kann grundsätzlich unabhängig davon eingesetzt werden, ob sich das Leimventil oder ggf. die Fertigungsvorrichtung, der es zugeordnet ist, in Betrieb befindet oder nicht.The method can basically be used regardless of whether the glue valve or possibly the manufacturing device to which it is associated is in operation or not.

Beispielsweise kann während der aktuellen, insbesondere händischen Einstellung des Leimventils, d.h. im Einrichtbetrieb desselben, ein Bedürfnis bestehen, den aktuellen Ventilhub mit dem erfindungsgemäßen Verfahren zu erkennen.For example, during the current, especially manual adjustment of the glue valve, i. in Einrichtbetrieb the same, there is a need to recognize the current valve lift with the method according to the invention.

Alternativ oder zusätzlich kann im Fertigungsprozess bzw. bei in Betrieb befindlichem Leimventil bzw. in Betrieb befindlicher Fertigungsvorrichtung das erfindungsgemäße Verfahren vorteilhafterweise zur Überwachung des zuvor eingestellten Ventilhubs des jeweiligen Leimventils eingesetzt werden.Alternatively or additionally, the method according to the invention can advantageously be used to monitor the previously set valve lift of the respective glue valve in the production process or in the operation of a glue valve or manufacturing device in operation.

Bevorzugt wird das Leimventil im Fertigungsprozess taktweise betrieben mit Beleimungsphasen, in der Leim zur Ausgabe von Leim geöffnet ist, und Ruhephasen, in der das Ventil geschlossen ist, sodass kein Leim austritt, wobei die Ist-Werte der Spuleninduktivität in mindestens einer der Ruhephasen des Leimventils ermittelt werden.Preferably, the glue valve is cyclically operated in the manufacturing process with Beleimungsphasen in which glue is opened to dispense glue, and rest periods in which the valve is closed so that no glue leaks, wherein the actual values of the coil inductance in at least one of the rest phases of the glue valve be determined.

Vorzugsweise werden die Ist-Induktivitätswerte des Ventils dabei ermittelt, indem, insbesondere während der Ruhephase des Ventils, ein geeigneter, insbesondere in der Stärke veränderlicher Messstrom, in der Regel ein Wechselstrom, durch die mindestens eine Spule geführt wird.Preferably, the actual inductance values of the valve are determined by, in particular during the rest phase of the valve, a suitable, in particular variable in the measuring current, usually an alternating current, is passed through the at least one coil.

Der Messstrom kann dabei beispielsweise durch einen geeigneten Schwingkreis verursacht werden, wobei die Spule während der Messung Bestandteil des Schwingkreises ist.The measuring current can be caused for example by a suitable resonant circuit, wherein the coil is part of the resonant circuit during the measurement.

Was die Auswertung der ermittelten Ist-Induktivitätswerte betrifft, so kann abhängig von dem Ist-Wert der gemessenen Spuleninduktivität beispielsweise entweder ein erstes, bevorzugt optisches Signal erzeugt werden, das einen für das Leimventil zulässigen Ventilhubwert repräsentiert, oder ein zweites, sich von dem ersten unterscheidendes, ebenfalls bevorzugt optisches Signal, das einen für das Leimventil unzulässigen Ventilhubwert repräsentiert.As regards the evaluation of the determined actual inductance values, depending on the actual value of the measured coil inductance, for example, either a first, preferably optical signal can be generated, which represents a valve lift value permissible for the glue valve, or a second, which differs from the first Also preferred is an optical signal representing a valve stroke value that is not allowed for the glue valve.

Alternativ oder zusätzlich kann der gemessene Ist-Wert der Spuleninduktivität oder ein von diesem bevorzugt linear abhängiger Wert insbesondere optisch angezeigt werden, bevorzugt auf einem Bildschirm.Alternatively or additionally, the measured actual value of the coil inductance or a value which is preferably linearly dependent thereon can in particular be visually displayed, preferably on a screen.

Zu automatischen Erfassung von Störungen eines in Betrieb befindlichen, d.h. innerhalb eines laufenden Fertigungsprozesse, insbesondere eines Verpackungsprozesses, arbeitenden Leimventils können die Ist-Werte der Temperatur des Leimventils ermittelt oder die Ist-Werte einer Messgröße, aus der die Ist-Temperaturwerte des Leimventils abgeleitet werden können. Die Ermittlung dieser Ist-Werte erfolgt dabei mehrfach, beispielsweise kontinuierlich oder von Zeit zu Zeit, während des laufenden Fertigungsprozesses. Die ermittelten Ist-Werte werden dann im Hinblick auf eine Störung des Leimventils - ebenfalls automatisch - ausgewertet. Bevorzugt werden dazu die Ist-Werte mit entsprechenden, für das Leimventil hinterlegten Soll- oder Grenzwerten verglichen und/oder mit entsprechenden Ist-Werten mindestens eines anderen, in Betrieb befindlichen bzw. innerhalb des laufenden Fertigungsprozesses arbeitenden Leimventils.For automatic detection of disturbances of an operating, i. The actual values of the temperature of the glue valve or the actual values of a measured variable from which the actual temperature values of the glue valve can be derived can be determined within a running production process, in particular a packaging process, by a glue valve. The determination of these actual values takes place multiple times, for example continuously or from time to time, during the ongoing production process. The determined actual values are then evaluated with regard to a malfunction of the glue valve - also automatically. For this purpose, the actual values are preferably compared with corresponding desired or limit values stored for the glue valve and / or with corresponding actual values of at least one other glue valve operating or operating within the current production process.

Dabei wurde erkannt, dass der Durchfluss des Leims durch das Leimventil Einfluss auf die Betriebstemperatur des Leimventils hat. Bei Störungen des Leimdurchflusses durch das Leimventil erhöht sich die Leimventiltemperatur, da der Leim des in Betrieb befindlichen Leimventils zur Kühlung desselben im Sinne eines "Kühlmittels" beiträgt. Störungen des Durchlaufs dieses "Kühlmittels" führen mithin zu messtechnisch erfassbaren Abweichungen der Ist-Leimventiltemperatur von einem ohne eine solche Durchflussstörung zu erwartenden Temperaturverhalten bzw. von einem Soll-Temperaturverhalten oder zusätzlich oder alternativ zu signifikanten Abweichungen der Leimventiltemperatur im Vergleich zu anderen, in Betrieb befindlichen Leimventilen.It was recognized that the flow of glue through the glue valve has an influence on the operating temperature of the glue valve. If the glue flow through the glue valve is impaired, the glue valve temperature increases because the glue of the glue valve in operation contributes to the cooling of the glue in the sense of a "coolant". Disturbances of the passage of this "coolant" thus lead to metrologically detectable deviations of the actual Leimventiltemperatur from a expected without such flow disturbance temperature behavior or a desired temperature behavior or in addition or alternatively to significant deviations of Leimventiltemperatur compared to other, in operation glue valves.

Bevorzugt wird ein solches Verfahren angewendet bei Leimventilen, die Bestandteil einer in Betrieb befindlichen Vorrichtung zur Herstellung und/oder Verpackung von Zigaretten oder anderen rauchbaren Gegenständen sind.Preferably, such a method is used in glue valves that are part of an operating device for the manufacture and / or packaging of cigarettes or other smokable objects.

Eine bevorzugte Messgröße, aus der grundsätzlich die Ist-Temperatur des Leimventils ableitbar ist, und deren Ist-Werte ermittelt werden können, ist der Widerstand mindestens einer Spule eines für die Betätigung eines Verschlussorgans des Ventils verwendeten Elektromagneten des Ventils. Dabei wurde erkannt, dass der jeweilige Ist-Wert des Spulenwiderstands ein gutes Maß für die Leimventiltemperatur ist.A preferred measurement variable, from which the actual temperature of the glue valve can be derived in principle, and whose actual values can be determined, is the resistance of at least one coil of an electromagnet of the valve used for actuating a closure member of the valve. It was recognized that the respective actual value of the coil resistance is a good measure of the glue valve temperature.

Alternativ oder zusätzlich ist natürlich auch denkbar, mittels geeigneten, üblichen Temperatursensoren, die zusätzlich an dem Leimventil angeordnet werden, die Ist-Temperatur des Leimventils direkt zu messen.Alternatively or additionally, it is also conceivable, of course, to measure the actual temperature of the glue valve directly by means of suitable, customary temperature sensors, which are additionally arranged on the glue valve.

Das Leimventil wird bevorzugt diskontinuierlich, insbesondere taktweise, betrieben, mit Betriebsphasen, nämlich Beleimungsphasen, in denen das Leimventil zur Ausgabe von Leim geöffnet ist, und mit Betriebsphasen, nämlich Ruhephasen, in denen das Ventil geschlossen ist, sodass kein Leim austritt. Insbesondere, aber nicht ausschließlich, wenn als die zu erfassenden Ist-Werte die Spulenwiderstandswerte gemessen werden, werden die Ist-Werte der Temperatur oder der Messgröße, aus der die Ist-Temperaturwerte abgeleitet werden können, in mindestens einer dieser Ruhephasen des Leimventils ermittelt.The glue valve is preferably operated discontinuously, in particular intermittently, with operating phases, namely gluing phases, in which the glue valve is open to dispense glue, and with operating phases, namely resting, in which the valve is closed, so that no glue leaks out. In particular, but not exclusively, if the coil resistance values are measured as the actual values to be detected, the actual values of the temperature or the measured variable from which the actual temperature values can be derived are determined in at least one of these rest phases of the glue valve.

Was die Auswertung der ermittelten Ist-Werte betrifft, so kann vorgesehen sein, dass für den Fall, dass die Ist-Werte der Temperatur oder der Messgröße, aus der die Ist-Temperatur abgleitet werden kann, um ein vorgegebenes Maß von den entsprechenden, für das Leimventil hinterlegten Sollwerten abweichen oder von den entsprechenden Ist-Werten des mindestens einen anderen im Betrieb befindlichen Leimventils, ein geeignetes Fehlersignal erzeugt wird.As far as the evaluation of the determined actual values is concerned, it can be provided that in the event that the actual values of the temperature or the measured variable from which the actual temperature can be derived, by a predetermined amount from the corresponding, for deviate from the set valve deposited values or from the corresponding actual values of the at least one other in operation Leimventils, a suitable error signal is generated.

Alternativ oder zusätzlich kann vorgesehen sein, dass für den Fall, dass mindestens ein Ist-Wert der Temperatur oder der Messgröße, aus der die Ist-Temperatur abgleitet werden kann, den für das Leimventil hinterlegten Grenzwert erreicht oder überschreitet, ein geeignetes Fehlersignal erzeugt wird.Alternatively or additionally, it may be provided that in the event that at least one actual value of the temperature or the measured variable, from which the actual temperature can be derived, reaches or exceeds the limit value stored for the glue valve, a suitable error signal is generated.

Ein Überschreiten eines Grenzwertes erfasst dabei im Rahmen der Anmeldung nicht nur das Überschreiten eines oberen Grenzwertes, sondern zusammenfassend auch ein Überschreiten eines unteren Grenzwertes von "oben kommend", d.h. ausgehend von Werten, die zunächst größer sind als der Grenzwert (im Stand der Technik vereinzelt auch als "Unterschreiten" eines Grenzwertes bezeichnet).Exceeding a limit recorded in the context of the application not only the exceeding of an upper limit, but in summary also exceeding a lower limit of "coming up", ie starting from values that are initially greater than the limit (isolated in the art also referred to as "falling below a limit value").

Es können im Übrigen Soll-Werte der Messgröße, aus der die Temperatur abgeleitet werden kann, und/oder die Temperatur-Sollwerte und/oder die Sollwerte der Spuleninduktivität und/oder die Tabelle oder das Diagramm, in der/in dem Spulenwiderstandswerten Temperaturwerte des Lärmventils zugeordnet sind, aus einem an dem Ventil angeordneten Transponder ausgelesen werden.Incidentally, target values of the measured variable from which the temperature can be derived, and / or the temperature set values and / or the setpoint values of the coil inductance and / or the table or the graph, in the coil resistance value (s), can be temperature values of the noise valve are assigned to be read from a arranged on the valve transponder.

Weitere Merkmale der vorliegenden Erfindung ergeben sich aus den beigefügten Unteransprüchen, aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele der Erfindung sowie aus den beigefügten Zeichnungen.Further features of the present invention will become apparent from the appended dependent claims, from the following description of preferred embodiments of the invention and from the accompanying drawings.

Darin zeigt:

Fig. 1
ein Leimventil in einem Vertikalschnitt,
Fig. 2
eine schematische Darstellung eines Beleimungssystems aus mehreren Leimventilen,
Fig. 3
ein Spulenwiderstand-Betriebslaufzeit-Diagramm, in dem verschiedene Soll- und Ist-Kurvenverläufe von unterschiedlichen Leimventilen aufgetragen sind,
Fig. 4
ein Temperatur-Spulenwiderstand-Diagramm, in dem unterschiedliche Kennlinien von Leimventilen des Beleimungssystems eingetragen sind,
Fig. 5
ein Induktivität-Drehwinkel-Diagramm, in dem für verschiedene Leimventile des Beleimungssystems entsprechende Kurvenverläufe eingetragen sind,
Fig. 6
ein Strom-Zeit-Diagramm, in dem für ein Leimventil der Verlauf des durch die Spule des Leimventils geführten elektrischen Stromes eingetragen ist.
It shows:
Fig. 1
a glue valve in a vertical section,
Fig. 2
a schematic representation of a gluing system of several glue valves,
Fig. 3
a coil resistance operating time diagram in which different desired and actual curve profiles of different glue valves are plotted,
Fig. 4
a temperature coil resistance diagram in which different characteristics of glue valves of the gluing system are entered,
Fig. 5
an inductance-rotation angle diagram in which corresponding curve profiles are entered for different glue valves of the gluing system,
Fig. 6
a current-time diagram in which is entered for a glue valve, the course of the guided through the coil of the glue valve electric current.

Die in den Fig. 1 und 2 gezeigten Leimventile 10 sind Teil eines erfindungsgemäßen Beleimungssystems 25 (vgl. Fig. 2), das wiederum Teil einer nicht gezeigten Vorrichtung zur Fertigung von Zigaretten oder Verpackungen für diese Zigaretten ist bzw. Teil einer Vorrichtung zur Herstellung und/oder Verpackung von Zigaretten. Solche Vorrichtungen können Maschinen sein wie etwa ein Maker, eine Verpackungsmaschine zur Herstellung der eigentlichen Zigarettenpackungen (Packer), eine Folieneinschlagmaschine (Cello), ein Stangenpacker, ein Kartonpacker oder ein Palettierer oder dergleichen.The in the Fig. 1 and 2 Gluing valves 10 shown are part of a gluing system 25 according to the invention (cf. Fig. 2 ), which in turn is part of a device, not shown, for the production of cigarettes or packaging for these cigarettes or part of a device for producing and / or packaging cigarettes. Such devices may be machines such as a maker, a packaging machine for making the actual cigarette packs (packer), a film wrapping machine (cello), a bar packer, a carton packer or a palletizer, or the like.

Die Leimventile 10 sind in ihrem grundsätzlichen Aufbau in Teilen bekannt, beispielsweise aus der DE 10 2009 022 496.3 .The glue valves 10 are known in their basic structure in parts, for example from the DE 10 2009 022 496.3 ,

Ein solches Leimventil 10 umfasst ein Ventilgehäuse 11 sowie ein daran befestigtes Steckergehäuse 12.Such a glue valve 10 comprises a valve housing 11 and a plug housing 12 fastened thereto.

Das Leimventil 10 verfügt über einen Elektromagneten 14. Vorliegend ist der Elektromagnet 14 in einem Ventilgehäuseinnenraum 13 angeordnet. Grundsätzlich können auch mehrere Elektromagneten 14 eingesetzt werden.The glue valve 10 has an electromagnet 14. In the present case, the electromagnet 14 is arranged in a valve housing interior 13. In principle, a plurality of electromagnets 14 can also be used.

Der Elektromagnet 14 weist eine Spule 15 mit einzelnen Windungen auf. Die Spule 15 ist auf einem Spulenträger 16 aufgewickelt. Der Spulenträger 16 ist Teil einer Ventilkammer 17. Auf einen solchen Spulenträger 16 kann naturgemäß auch verzichtet werden, sodass die Spule 15 in einem solchen Fall freitragend ausgebildet wäre.The electromagnet 14 has a coil 15 with individual windings. The coil 15 is wound on a bobbin 16. The bobbin 16 is part of a valve chamber 17. On such a bobbin 16 can of course also be dispensed with, so that the coil 15 would be designed to be self-supporting in such a case.

Im Inneren des Ventilgehäuseinnenraums 13, genauer gesagt im Inneren des Elektromagneten 14 bzw. der Spule 15, insbesondere innerhalb einer mittigen Öffnung des Spulenträgers 16, ist ein Verschluss- bzw. Dosierorgan 18 des Ventils 10 bewegbar angeordnet, im vorliegenden Fall ein Ventilstößel.Inside the valve housing interior 13, more specifically inside the electromagnet 14 or the coil 15, in particular within a central opening of the coil support 16, a closing or metering device 18 of the valve 10 is movably arranged, in the present case a valve lifter.

An einem unteren Schaft 19 des Verschlussorgans 18 ist ein Verschlussmittel 20 angeordnet, vorliegend eine Kugel. Das Verschlussmittel 20 ist einer Ventilöffnung 21 zugeordnet. Die Ventilöffnung 21 befindet sich mittig im Bereich eines trichterförmigen Ventilsitzes 22. Das Verschlussmittel 20 liegt in Schließstellung des Ventils 10 an konischen Sitzflächen des Ventilsitzes 22 an.On a lower shaft 19 of the closure member 18, a closure means 20 is arranged, in this case a ball. The closure means 20 is associated with a valve opening 21. The valve opening 21 is located centrally in the region of a funnel-shaped valve seat 22. The closure means 20 is in the closed position of the valve 10 on conical seating surfaces of the valve seat 22 at.

Über einen Leimanschluss 23 kann dem Leimventil 10 zu dosierender Leim aus der in Fig. 2 dargestellten Leimquelle 24 des Beleimungssystems 25 mittels Leimleitungen 24a zugeführt werden. Von dem Leimanschluss 23 wird der Leim zunächst entlang eines Leimkanals 26 des Leimventils 10 und anschließend über von diesem abgehende Anschlusskanäle 27 in die Ventilkammer 17 geführt.About a glue connection 23 can be the glue valve 10 to be metered glue from the in Fig. 2 shown glue source 24 of the gluing system 25 are supplied by glue lines 24a. From the glue connection 23, the glue is first guided along a glue channel 26 of the glue valve 10 and then into the valve chamber 17 via connecting channels 27 leaving it.

Das Verschlussorgan 18 kann durch geeignete Beaufschlagung des Elektromagneten 14 mit elektrischem Strom geöffnet werden, sodass Leim aus der Ventilkammer 17 austreten kann.The closure member 18 can be opened by suitable loading of the electromagnet 14 with electric current, so that glue can escape from the valve chamber 17.

Zu diesem Zweck umgibt die Spule 15 des Elektromagneten 14 das Verschlussorgan 18 zumindest abschnittsweise. Das Verschlussorgan 18, bevorzugt ein magnetisierbares, in der Regel metallisches Kolbenstück 28 desselben, wirkt innerhalb der Spule 15 als Kern des Elektromagneten 14.For this purpose, the coil 15 of the electromagnet 14 surrounds the closure member 18 at least in sections. The closure member 18, preferably a magnetizable, usually metallic piston piece 28 thereof, acts within the coil 15 as the core of the electromagnet 14.

Bei geeignetem Durchfluss elektrischen Stroms durch die Spule 15 überträgt diese eine resultierende Magnetkraft auf das Kolbenstück 28, wodurch das Verschlussorgan 18 insgesamt aus der in Fig. 1 gezeigten Schließstellung in eine Öffnungsstellung bewegt wird, in der der Leim aus der Ventilöffnung 21 austreten kann.With a suitable flow of electric current through the coil 15, this transmits a resultant magnetic force on the piston piece 28, whereby the closure member 18 in total from the in Fig. 1 shown closed position is moved to an open position in which the glue can escape from the valve opening 21.

Das Verschlussorgan 18 ist vorzugsweise permanent in Schließrichtung beaufschlagt von einer Schließkraft eines Schließmittels bzw. Schließorgans. Dieses ist in dem vorliegenden Ausführungsbeispiel als ein zwei Einzelmagnete umfassender Dauermagnet ausgebildet, der eine permanente Magnetkraft auf das Verschlussorgan 18 im Sinne einer Schließbewegung ausübt. Natürlich können auch andere, geeignete Schließkräfte ausübende Schließmittel verwendet werden, etwa (Rückhol-)Federn oder dergleichen.The closure member 18 is preferably permanently urged in the closing direction by a closing force of a closing means or closing member. This is formed in the present embodiment as a two individual magnets comprehensive permanent magnet which exerts a permanent magnetic force on the closure member 18 in the sense of a closing movement. Of course, other suitable closing forces exerting closing means may be used, such as (return) springs or the like.

Einer der Einzelmagnete des Dauermagneten ist am freien Ende bzw. an einem Kopfteil 32 eines magnetisierbaren, metallischen Bauteils 29 angeordnet, dessen Stellung relativ zum Verschlussorgan 18 in nachfolgend noch näher zu erläuternder Weise den Ventilhub beeinflusst.One of the individual magnets of the permanent magnet is arranged at the free end or on a head part 32 of a magnetizable, metallic component 29 whose position is relative to the closure member 18 in the manner to be explained in more detail below the valve lift.

Das freie untere Ende bzw. das Kopfteil 32 des Bauteils 29 liegt dem freien oberen Ende des Kolbenstücks 28 des Verschlussorgans 18 gegenüber. Dabei ist auch das Kopfteil 32 des Bauteils 29 - ähnlich wie das Kolbenstück 28 des Verschlussorgans 18 - nach Art eines Kerns des Elektromagneten 14 unmittelbar innerhalb der Spule 15 angeordnet bzw. die Spule 15 umgibt dieses Kopfteil 32.The free lower end or the head part 32 of the component 29 is opposite the free upper end of the piston piece 28 of the closure member 18. In this case, the head part 32 of the component 29 - similar to the piston piece 28 of the closure member 18 - arranged in the manner of a core of the electromagnet 14 directly within the coil 15 and the coil 15 surrounds this head part 32nd

Der andere Einzelmagnet des Dauermagneten ist dem Einzelmagnet des Kopfteils 32 gegenüberliegend am Verschlussorgan 18 bzw. am freien Ende des Kolbenstücks 28 befestigt.The other single magnet of the permanent magnet is the individual magnet of the head portion 32 opposite to the closure member 18 and attached to the free end of the piston piece 28.

Die Einzelmagnete haben vorliegend auch bei geöffnetem Leimventil 10 einen (geringen) Abstand voneinander.The individual magnets have in the present case even when the glue valve 10 is open a (small) distance from each other.

Die gegenüberliegenden Einzelmagnete sind so positioniert, dass gleiche Pole einander zugekehrt sind, zum Beispiel die Nordpole derselben. Hierdurch wird permanent eine abstoßende Kraft auf das Verschlussorgan 18 übertragen, nämlich die oben bereits erwähnte Schließkraft. Um das Ventil 10 zu öffnen, wird durch den geeigneten Strom durch den Elektromagneten 14 bzw. durch die Spule 15 die dieser Schließkraft entgegengesetzte, auf das Verschlussorgan 19 wirkende, magnetische Öffnungskraft erzeugt, die die Schließkraft überwindet und während des Öffnungsvorgangs dementsprechend größer ist als diese.The opposing individual magnets are positioned so that like poles are facing each other, for example, the north poles of the same. As a result, a repulsive force is permanently transmitted to the closure member 18, namely the above-mentioned closing force. In order to open the valve 10, by the appropriate current through the electromagnet 14 and through the coil 15, the magnetic opening force acting on the closure member 19 opposite this closing force is generated which overcomes the closing force and is correspondingly larger during the opening operation ,

Das magnetisierbare Bauteil 29 bildet - wie oben bereits angedeutet - zusammen mit den Einzelmagneten einen einstellbaren Hubbegrenzer für das Verschlussorgan 18, der die Länge des Weges begrenzt, um den das Verschlussorgan 18 während der Öffnungsbewegung in der Ventilkammer 17 maximal nach oben bewegt werden kann. Bei Öffnung des Ventils 10 wird das Verschlussorgan 18 durch die von dem Elektromagneten 14 aufgebrachte Öffnungskraft so weit nach oben in Richtung des magnetisierbaren Bauteils 29 bewegt bzw. dem Bauteil 29, vorliegend dem Kopfteil 32 desselben, so weit angenähert, bis die abstoßende Magnetkraft zwischen den Einzelmagneten der nach oben bzw. auf das Verschlussorgan 18 wirkenden Öffnungskraft entspricht bzw. diese übersteigt. An welcher Position des Verschlussorgans 18, also bei welchem Wert des Ventilhubs dies der Fall ist, hängt unter anderem maßgeblich von der Stellung des Bauteils 29 bzw. des Kopfteils 32 desselben ab.The magnetizable component 29 forms - as already indicated above - together with the individual magnets an adjustable stroke limiter for the closure member 18, which limits the length of the path by which the closure member 18 during the opening movement in the valve chamber 17 can be moved maximally upward. When opening the valve 10, the closure member 18 is moved by the opening force applied by the electromagnet 14 so far up in the direction of the magnetizable member 29 or the component 29, in this case the head portion 32 thereof, so far approximated until the repulsive magnetic force between the Single magnet of the upward or acting on the closure member 18 opening force corresponds to or exceeds this. At which position of the closure member 18, that is at which value of the Ventilhubs this is the case depends inter alia significantly on the position of the component 29 and the head part 32 thereof.

Diese Stellung des Bauteils 29 ist zur Einstellung des Ventilhubs relativ zu dem Verschlussorgan 18 bzw. zu der Ventilkammer 17 veränderbar, indem das Bauteil 29 durch einen händischen Einstellvorgang entweder in Richtung des Verschlussorgans 18 weiter nach unten bewegt wird oder in die entgegengesetzte Richtung weiter nach oben.This position of the component 29 is variable to adjust the valve lift relative to the closure member 18 and to the valve chamber 17 by the component 29 is moved by a manual adjustment either in the direction of the closure member 18 further down or in the opposite direction further upwards ,

Zu diesem Zweck verfügt das Bauteil 29 im oberen Bereich, d.h. oberhalb des Kopfteils 32, über einen Gewindeabschnitt 30 bzw. eine Einstellschraube. Die Einstellschraube 30 ist in einem feststehenden Träger 31 des Ventils 10 mit entsprechendem Innengewinde in Längsrichtung verstellbar. Am freien oberen Ende der Einstellschraube 30 ist eine Ausnehmung angebracht zum Ansetzen eines Werkzeugs, zum Beispiel eines Innensechskantschlüssels. Das gesamte Bauteil 29 kann durch Drehung der Einstellschraube mithilfe des Werkzeugs um seine Längsachse je nach Drehrichtung entweder weiter nach oben oder weiter nach unten verfahren werden.For this purpose, the component 29 has in the upper area, i. above the head portion 32, via a threaded portion 30 and an adjusting screw. The adjusting screw 30 is adjustable in a fixed support 31 of the valve 10 with a corresponding internal thread in the longitudinal direction. At the free upper end of the adjusting screw 30, a recess is provided for applying a tool, for example a hexagon socket wrench. The entire component 29 can be moved by rotation of the adjusting screw by means of the tool about its longitudinal axis depending on the direction of rotation either further up or further down.

Im Betrieb des Beleimungssystems 25 werden sämtliche Leimventile 10 mittels eines Mastercontrollers 33 des Beleimungssystems 25 sowie mittels über Steuerleitungen 35 mit dem Mastercontroller 33 verbundene, nachgeordnete bzw. lokale Controller 36 gesteuert, die jeweils mit dem übergeordneten Mastercontroller 33 verbunden sind. Jedem Leimventil 10 ist dabei jeweils ein lokaler Controller 36 zugeordnet.During operation of the gluing system 25, all glue valves 10 are controlled by means of a master controller 33 of the gluing system 25 and by subordinate or local controllers 36 connected to the master controller 33 via control lines 35, which are respectively connected to the superordinate master controller 33. Each glue valve 10 is assigned a local controller 36 in each case.

Der Mastercontroller 33 des Beleimungssystems 25 ist über eine Steuerleitung 34 mit einer übergeordneten, zentralen Maschinensteuerung verbunden.The master controller 33 of the gluing system 25 is connected via a control line 34 to a higher-level central machine control.

In dem Fall, dass das Beleimungssystem 25 beispielsweise an einer Verpackungsmaschine für Zigarettenpackungen angeordnet ist, wäre der Mastercontroller 33 beispielsweise mit der zentralen Maschinensteuerung dieser Verpackungsmaschine verbunden.For example, in the case that the gluing system 25 is arranged on a cigarette packaging machine, the master controller 33 would be connected to the central machine control of this packaging machine.

Den lokalen Controllern 36 werden von dem Mastercontroller 33 des Beleimungssystems 25 jeweils Steuerungsparameter übermittelt, anhand derer die lokalen Controller 36 die Einzelsteuerungen der Ventile 10 vornehmen. Einzelheiten einer möglichen Steuerungstechnik sind beispielsweise in der DE 10 2009 029 821.5 offenbart, deren Inhalt in die vorliegende Anmeldung integriert wird.The local controllers 36 each receive control parameters from the master controller 33 of the gluing system 25, by means of which the local controllers 36 carry out the individual control of the valves 10. Details of a possible Control technology, for example, in the DE 10 2009 029 821.5 discloses the content of which is incorporated into the present application.

Im Ergebnis werden über die Controller 33, 36 die Öffnungs- und Schließbewegungen der Leimventile 10 gesteuert bzw. gegebenenfalls geregelt. Die Bewegungen des Verschlussorgans 18 jedes Ventils 10 werden dabei durch Beaufschlagung des Elektromagneten 14 bzw. der Spule 15 des entsprechenden Ventils 10 mit einem geeigneten Steuerstrom erreicht. Hierzu verfügen die lokalen Controller 36 über geeignete Strom- bzw. Spannungsquellen bzw. geeignete Verstärker und sind jeweils mittels Stromleitungen 37 mit den Ventilen 10 verbunden.As a result, the opening and closing movements of the glue valves 10 are controlled or optionally regulated by the controllers 33, 36. The movements of the closure member 18 of each valve 10 are achieved by applying the electromagnet 14 and the coil 15 of the corresponding valve 10 with a suitable control current. For this purpose, the local controllers 36 have suitable current or voltage sources or suitable amplifiers and are each connected by means of power lines 37 to the valves 10.

Mit entsprechenden durch die Controller 33, 36 sowie der zentralen Maschinensteuerung umgesetzten Steuerungsverfahren können die Ventile 10 beispielsweise so gesteuert werden, dass sie etwa im Betrieb einer Verpackungsmaschine jeweils taktweise einzelne Zuschnitte von Zigarettenpackungen mit entsprechenden Leimportionen versehen können.With corresponding control methods implemented by the controllers 33, 36 and the central machine control, the valves 10 can be controlled, for example, such that they can cyclically provide individual blanks of cigarette packs with corresponding glue portions, for example during operation of a packaging machine.

Der Einfachheit halber wird im Rahmen dieser Anmeldung unabhängig davon, ob Regelungs- oder Steuerungsvorgänge beschrieben werden, vereinheitlichend der Begriff Steuerung verwendet.For the sake of simplicity, the term control is used unifying in the context of this application, regardless of whether control or regulatory operations are described.

Mithilfe eines oder mehrere der beschriebenen Controller bzw. Steuerungen, nachfolgend zusammenfassend als "Steuerung" bezeichnet, können für die Erfindung wichtige Erkennungs- oder Überwachungsverfahren umgesetzt werden.With the aid of one or more of the described controllers, hereinafter referred to collectively as "controller", recognition or monitoring methods which are important for the invention can be implemented.

So kann gemäß einem besonders wichtigen Aspekt der Erfindung beispielsweise im Einrichtbetrieb des Beleimungssystems 25, aber auch im Laufenden Betrieb der zugeordneten Vorrichtung zur Herstellung und/oder Verpackung von Zigaretten, automatisch der jeweils eingestellte Ventilhub jedes Leimventils 10 des Beleimungssystems 25 erfasst und angezeigt werden.Thus, according to a particularly important aspect of the invention, for example, in Einrichtbetrieb the Beleimungssystems 25, but also in ongoing operation of the associated device for producing and / or packaging cigarettes, each set valve lift each glue valve 10 of the gluing system 25 automatically detected and displayed.

Die Steuerung erfasst hierzu jeweils den Ist-Induktivitätswert der Spule 15 des Elektromagneten 14 des Ventils 10. Dieser Induktivitätswert wird unter anderem maßgeblich beeinflusst von der Stellung des Bauteils 29, insbesondere des Kopfes 32 desselben, relativ zur Spule 15. Je weiter unten sich das Bauteil 29 in dem Ventil 10 befindet, d.h. je stärker es in das Spuleninnere eingetaucht ist, desto größer ist der messbare, aktuelle Induktivitätswert der Spule 15. Da die Stellung des Bauteils 29 wiederum unmittelbar den Ventilhub beeinflusst, ist somit der Ist-Wert der Spuleninduktivität ein Maß für den eingestellten Ventilhub. Durch die erfindungsgemäße Messung der Spuleninduktivität ist daher der Ventilhub ermittelbar. Insbesondere kann die Steuerung im Zuge dessen beispielsweise ermitteln, ob der aktuell eingestellte Ventilhub einen zulässigen Wert aufweist und beispielsweise - falls dies nicht der Fall ist - ein Fehlersignal erzeugen.For this purpose, the control detects in each case the actual inductance value of the coil 15 of the electromagnet 14 of the valve 10. This inductance value is significantly influenced inter alia by the position of the component 29, in particular the head 32 thereof, relative to the coil 15. The lower the component 29 in the valve 10th That is, the more it is immersed in the coil interior, the greater the measurable current inductance value of the coil 15. Since the position of the component 29 in turn directly influences the valve lift, the actual value of the coil inductance is thus a measure of the set valve lift , By measuring the coil inductance according to the invention, therefore, the valve lift can be determined. In particular, the controller can determine in the course of this, for example, whether the currently set valve lift has a permissible value and, for example - if this is not the case - generate an error signal.

Naturgemäß können, allgemein gesprochen, abhängig von dem gemessenen Induktivitätswert verschiedenste Maßnahmen und Berechnungen durchgeführt werden. Abhängig von dem gemessenen Induktivitätswert könnte die Steuerung beispielsweise im Einrichtbetrieb einem Einrichter insbesondere optisch den von ihm händisch über die Einstellschraube 30 eingestellte Ventilhub bzw. ein Maß für diesen mittelbar oder unmittelbar anzeigen, bevorzugt optisch auf einem geeigneten Bildschirm. Hierbei kann entweder der gemessenen Wert der Spuleninduktivität direkt angezeigt werden oder ein von diesem Wert insbesondere linear abhängiger Wert, der ein Maß für den Ventilhub ist.Of course, generally speaking, various measures and calculations can be carried out depending on the measured inductance value. Depending on the measured inductance value, the controller could display, for example, in the set-up mode, a setter, in particular optically, the valve lift manually set by means of the adjusting screw 30 or a measure for the latter, preferably optically on a suitable screen. In this case, either the measured value of the coil inductance can be displayed directly, or a value which is particularly linearly dependent on this value and which is a measure of the valve lift.

Es ist auch denkbar, dass abhängig von dem Ist-Wert der gemessenen Spuleninduktivität ein erstes Signal erzeugt wird, das einen für das Leimventil zulässigen Ventilhubwert repräsentiert, oder ein zweites, anderes Signal, das einen für das Leimventil unzulässigen Ventilhubwert repräsentiert.It is also conceivable that, depending on the actual value of the measured coil inductance, a first signal is generated which represents a valve stroke value permissible for the glue valve, or a second, different signal which represents a valve stroke value which is not permissible for the glue valve.

In Fig. 2 ist beispielsweise gezeigt, dass an den lokalen Controllern 36 jeweils ein erstes und ein zweites Leuchtmittel 39a, 39b angeordnet ist, beispielsweise eine grüne Signalleuchte und eine rote Signalleuchte. Insofern der gemessene Wert der Spuleninduktivität bzw. der davon abhängige Wert des Ventilhubs zulässig ist, leuchtet die grüne Signalleuchte 39a, insofern der gemessene Wert der Spuleninduktivität bzw. der davon abhängige Ventilhubwert nicht zulässig ist, leuchtet die rote Signalleuchte 39b.In Fig. 2 For example, it is shown that a first and a second lighting means 39a, 39b are respectively arranged on the local controllers 36, for example a green signal light and a red signal light. Insofar as the measured value of the coil inductance or the value of the valve lift dependent thereon is permissible, the green signal lamp 39a lights up, insofar as the measured value of the coil inductance or the valve lift value dependent thereon is not permissible, the red signal lamp 39b lights up.

Zur Auswertung der gemessenen Ist-Werte der Induktivität kann die Steuerung zweckmäßigerweise diese Ist-Werte mit für das Leimventil hinterlegten Soll-Werten oder mit für dieses hinterlegten Grenzwerten vergleichen. Die entsprechenden Werte können beispielsweise in geeigneten digitalen Datenspeichern der Steuerung hinterlegt sein.In order to evaluate the measured actual values of the inductance, the control can expediently compare these actual values with reference values stored for the glue valve or with limit values stored for the glue valve. The corresponding values can, for example, be stored in suitable digital data memories of the controller.

Fig. 5 zeigt die Abhängigkeit der Spuleninduktivität von dem Drehwinkel a, der ein Maß für die Stellung der Einstellschraube 30 des Bauteils 29 ist. Im vorliegenden Fall entspricht der Wert α = 0° einem Drehwinkel der Einstellschraube 30, bei dem das Bauteil 29 in eine untere Endstellung gebracht ist. Die ansteigenden α-Werte entsprechen dann Drehwinkeln, um die die Einstellschraube 30 ausgehend von der 0°-Stellung um ihre Längsachse rotiert wird, um das Bauteil 29 aus der unteren Endstellung weiter nach oben zu bewegen und dabei den Ventilhub zu vergrößern. Fig. 5 shows the dependence of the coil inductance of the rotation angle a, which is a measure of the position of the adjusting screw 30 of the component 29. In the present case, the value α = 0 ° corresponds to a rotational angle of the adjusting screw 30, in which the component 29 is brought into a lower end position. The increasing α values then correspond to angles of rotation about which the adjusting screw 30 is rotated about its longitudinal axis, starting from the 0 ° position, in order to move the component 29 further upwards from the lower end position, thereby increasing the valve lift.

Die unterschiedlichen Kurven C, D, E in Fig. 5 entsprechen dabei jeweils unterschiedlichen Leimventilen 10 des Beleimungssystems 25. Trotz an sich gleicher Spezifikationen unterscheiden sich die einzelnen, drehwinkelbezogenen Induktivitätswertverläufe der jeweiligen Ventile 10 geringfügig. Entsprechend unterscheiden sich zweckmäßigerweise auch die jeweiligen Sollwertvorgaben bzw. Grenzwertvorgaben für jedes Ventil 10 geringfügig.The different curves C, D, E in Fig. 5 in each case correspond to different glue valves 10 of the gluing system 25. Despite the same specifications, the individual, angle of rotation-related Induktivitätswertverläufe the respective valves 10 differ slightly. Accordingly, the respective setpoint specifications or limit values for each valve 10 expediently differ slightly.

Schraffiert dargestellt ist beispielsweise ein Winkelbereich 38, in dem entsprechend der obigen Ausführungen die Werte der Spuleninduktivitäten bezogen auf das jeweilige Leimventil 10 zulässige Werte annehmen, sodass, insofern dies Werte gemessen würden, die grüne Lampe 39a leuchten würde. Mit anderen Worten befindet sich der eingestellte Ventilhub bei den entsprechenden Drehwinkeln der Einstellschraube 30 in einem zulässigen Bereich. Außerhalb des schraffierten Bereichs 38 werden die Induktivitätswerte und somit die entsprechenden Ventilhubwerte als unzulässig eingestuft. Mithin würde die rote Lampe 39b leuchten.For example, an angle range 38 is shown in hatched form in which, according to the above, the values of the coil inductances relative to the respective glue valve 10 assume permissible values, so that, if values were measured, the green lamp 39a would light up. In other words, the set valve lift is at the corresponding rotational angles of the adjusting screw 30 in an allowable range. Outside the hatched area 38, the inductance values and thus the corresponding valve lift values are classified as inadmissible. Thus, the red lamp 39b would light up.

Wie beispielsweise zu erkennen ist, sind bei dem Ventil 10, das durch den Kurvenverlauf E repräsentiert ist, die Werte für die untere zulässige Grenze der Induktivität bzw. für die obere zulässige Grenze kleiner als bei den Ventilen 10, die durch die Kurvenverläufe C, D repräsentiert werden.For example, as can be seen, in the valve 10 represented by the curve E, the values for the lower allowable limit of the inductance and for the upper allowable limit, respectively, are smaller than those of the valves 10 represented by the curves C, D be represented.

Grundsätzlich ist im Übrigen auch eine Auswertung der gemessenen Werte durch die Steuerung denkbar, bei der die für ein erstes Leimventil 10 gemessenen Induktivitätswerte mit dem Induktivitätswert mindestens eines anderen, insbesondere gleichartigen Leimventils 10 derselben, insbesondere zeit- bzw. phasengleich betriebenen Ventil-Baugruppe des Beleimungssystems 25 verglichen wird.In principle, an evaluation of the measured values by the control is also conceivable, in which the inductance values measured for a first glue valve 10 correspond to the inductance value of at least one other, in particular similar glue valve 10 of the same, in particular timed or in phase operated valve assembly of the glueing system 25 is compared.

Sollte es Abweichungen der gemessenen Werte voneinander geben, bzw. Abweichungen, die eine vorbestimmtes Maß überschreiten, kann die Steuerung entsprechend ein Fehlersignal erzeugen. Dieses Fehlersignal würde darauf hindeuten, dass mindestens eines der Leimventile fehlerhaft ist.Should there be deviations of the measured values from one another, or deviations that exceed a predetermined level, the controller can correspondingly generate an error signal. This error signal would indicate that at least one of the glue valves is faulty.

Was die Messung der Ist-Induktivitätswerte betrifft, so erfolgt diese bevorzugt im Betrieb des Ventils 10, beispielsweise während einer Ruhephase desselben, in der sich das Verschlussorgan 18 in der Schließstellung befindet. Eine Möglichkeit der Messung ist, mit Hilfe einer geeigneten Schwingkreisschaltung einen geeigneten Messstrom, insbesondere einen Wechselstrom, durch die Spule 15 zu leiten. Mit Hilfe dieses Messstroms kann dann in an sich bekannter Weise der Induktivitätswert der Spule 15 bestimmt werden.As far as the measurement of the actual inductance values is concerned, this is preferably carried out during operation of the valve 10, for example during a rest phase thereof, in which the closure member 18 is in the closed position. One possibility of the measurement is to conduct a suitable measuring current, in particular an alternating current, through the coil 15 with the aid of a suitable oscillating circuit circuit. With the aid of this measuring current, the inductance value of the coil 15 can then be determined in a manner known per se.

In Fig. 6 ist beispielhaft ein Diagramm dargestellt, das den zeitabhängigen Stromverlauf durch ein Leimventil 10 während des Betriebs desselben darstellen soll. Entsprechend dem Beispiel der Fig. 6 wird die Spule 15 periodisch bzw. taktweise mit identischen Stromstärken beaufschlagt. Die Kurvenabschnitte A und A' stellen die aufeinander folgenden Arbeitsphasen des Leimventils 10 während des Betriebs desselben dar.In Fig. 6 For example, a diagram illustrating the time-dependent current flow through a glue valve 10 during operation thereof is shown. According to the example of Fig. 6 the coil 15 is applied periodically or cyclically with identical currents. The curve sections A and A 'represent the successive phases of operation of the glue valve 10 during operation thereof.

Zunächst wird die Spule 15 in einer solchen Arbeitsphase A, A' mit in der Stärke ansteigendem Spulenstrom - Öffnungsstrom - beaufschlagt. Das hierdurch initiierte Magnetfeld des Elektromagneten 14 sorgt dafür, dass das Verschlussorgan 18 in der oben bereits beschriebenen Weise gegen die Schließkraft der Einzelmagneten in Längsrichtung nach oben bewegt wird, mithin das Ventil 10 geöffnet wird. In dieser Öffnungsstellung wird das Ventil dann mittels eines sogenannten Haltestroms gehalten, dessen Stärke etwas geringer ist als der zur Öffnung des Leimventils 10 notwendige Öffnungsstrom. Anschließend wird der Spulenstrom kontinuierlich bis auf Null oder annähernd Null reduziert, sodass sich das Verschlussorgan 18 in die Schließstellung rückbewegt. Im Anschluss erfolgt - bedingt durch die taktweise Ansteuerung der Ventile 10 - eine Ruhephase des Verschlussorgans 18, in der es in der Schließstellung verbleibt, bis die weitere Arbeitsphase A' beginnt.First, the coil 15 in such a working phase A, A 'with increasing in the power coil current - opening current - applied. The thereby initiated magnetic field of the electromagnet 14 ensures that the closure member 18 is moved in the manner already described above against the closing force of the individual magnets in the longitudinal direction upwards, thus the valve 10 is opened. In this open position, the valve is then held by means of a so-called holding current, the strength of which is slightly less than the opening opening of the glue valve 10 necessary opening flow. Subsequently, the coil current is continuously reduced to zero or approximately zero, so that the closure member 18 moves back into the closed position. Following this - due to the cyclical activation of the valves 10 - a rest phase of the closure member 18, in which it remains in the closed position, until the further working phase A 'begins.

In der Ruhephase des Leimventils 10 wird die Spule 15 - wie oben bereits angedeutet - entsprechend den Stromverlaufskurven B und B' in Fig. 6 mit einem Wechselstrom geringer Stärke beaufschlagt. Die Wechselstromstärke ist dabei so gewählt, dass hierdurch keine ungewollte Bewegung des Verschlussorgans 18 bewirkt wird. Vielmehr dient der Wechselstrom als reiner Messstrom, um die Induktivität der Spule in der Ruhephase zu messen.In the resting phase of the glue valve 10, the coil 15 - as already indicated above - corresponding to the current waveforms B and B 'in Fig. 6 subjected to an alternating current of low intensity. The alternating current intensity is chosen so that this causes no unwanted movement of the closure member 18. Much more The alternating current is used as a pure measuring current to measure the inductance of the coil in the resting phase.

Gemäß einem weiteren wichtigen Aspekt der vorliegenden Erfindung kann die Steuerung automatisch Störungen eines oder mehrerer Leimventile 10 erfassen. Hierzu werden die Ist-Werte der Temperatur des Leimventils oder die Ist-Werte einer Messgröße, aus der die Ist-Temperaturwerte des Leimventils 10 abgeleitet werden können, während des Betriebs des Leimventils 10 gemessen und im Hinblick auf eine Störung ausgewertet.In accordance with another important aspect of the present invention, the controller may automatically detect malfunctions of one or more size valves 10. For this purpose, the actual values of the temperature of the glue valve or the actual values of a measured variable, from which the actual temperature values of the glue valve 10 can be derived, are measured during operation of the glue valve 10 and evaluated with regard to a fault.

So kann beispielsweise das jeweilige Leimventil 10 in seinen Ruhephasen entsprechend Fig. 6 mit Messströmen F, F' beaufschlagt werden, insbesondere konstanter Stärke (Gleichstrom). Mit Hilfe dieser Messströme kann der jeweilige Ist-Widerstand der Spule 15 des Ventils 10 ermittelt werden.For example, the respective glue valve 10 in its phases of rest accordingly Fig. 6 with measuring currents F, F 'are applied, in particular constant strength (DC). With the aid of these measuring currents, the respective actual resistance of the coil 15 of the valve 10 can be determined.

Der Ist-Widerstand der Spule 15 ist ein Maß für die Ist-Temperatur des Leimventils 10. Denn die Ist-Temperatur des Leimventils 10 beeinflusst den Ist-Spulenwiderstand bzw. der Ist-Spulenwiderstand ist abhängig von der Ist-Temperatur. Fig. 3 zeigt zwei charakteristische Kurven bzw. Kennlinien G, H des Spulenwiderstands für zwei verschiedene Leimventile 10, und zwar abhängig von der Betriebsdauer t des jeweiligen Leimventils 10. Wie erkennbar ist, steigen mit fortlaufender Betriebsdauer des Leimventils 10 auch die Spulenwiderstandswerte desselben an.The actual resistance of the coil 15 is a measure of the actual temperature of the glue valve 10. For the actual temperature of the glue valve 10 influences the actual coil resistance or the actual coil resistance is dependent on the actual temperature. Fig. 3 shows two characteristic curves or characteristics G, H of the coil resistance for two different size valves 10, depending on the operating time t of the respective glue valve 10. As can be seen, as the glue valve 10 continues to operate, its coil resistance values also increase.

Denn zum einen erhöht sich häufig die Umgebungstemperatur der Leimventile 10 durch Wärme abgebende Aggregate im Umfeld der Leimventile 10, zum anderen wird Wärme aufgrund von Reibungsvorgängen in den Ventilen 10 erzeugt.On the one hand, the ambient temperature of the glue valves 10 often increases due to heat-emitting units in the vicinity of the glue valves 10, on the other hand heat is generated due to friction processes in the valves 10.

Die gestrichelten Kurvenverläufe G', H' in Fig. 3 zeigen tatsächliche Ist-Kurvenverläufe der Spulenwiderstände. Mit anderen Worten entsprechen diese Kurven den gemessenen Werten.The dashed curves G ', H' in Fig. 3 show actual actual curves of the coil resistances. In other words, these curves correspond to the measured values.

Wie erkennbar ist, weichen die Ist-Kurvenverläufe G', H' jeweils von den Soll- bzw. den erwarteten Kurvenverläufen G, H nach oben hin ab. Die Abweichungen erklären sich aus Störungen der Leimventile 10 aufgrund von Leimverschmutzungen innerhalb der Ventile 10, durch die der Durchfluss des Leims durch das jeweilige Leimventil 10 behindert wird. Der Leimdurchfluss sorgt grundsätzlich nach Art eines Kühlmittels für den Abtransport von Wärme des Leimventils 10. Bei Störungen des Durchflusses wird weniger Wärme abtransportiert, entsprechend weicht die Ist-Temperatur im Leimventil 10 von den Sollwerten ab und damit der Spulenwiderstand R von den erwarteten Verläufen G, H.As can be seen, the actual curve progressions G ', H' deviate upward from the desired or the expected curve progressions G, H, respectively. The deviations are explained by disturbances of the glue valves 10 due to glue contamination within the valves 10, which impedes the flow of glue through the respective glue valve 10. The glue flow basically ensures the removal of water in the manner of a coolant Heat of the Leimventils 10. In case of flow disturbances less heat is removed, accordingly deviates the actual temperature in the glue valve 10 from the setpoints and thus the coil resistance R of the expected curves G, H.

Im Rahmen der Auswertung der gemessenen Spulenwiderstandswerte werden die gemessenen Ist-Werte gemäß der Alternative in Fig. 3 allgemein gesprochen mit für das jeweilige Ventil 10 hinterlegten Soll- oder Grenzwerten verglichen. Insofern die gemessenen Ist-Werte von den Soll-Werten abweichen bzw. um ein vorbestimmtes Maß abweichen, gibt die Steuerung 33, 35 ein Fehlersignal aus.As part of the evaluation of the measured coil resistance values, the measured actual values according to the alternative in Fig. 3 generally speaking compared with set for the respective valve 10 setpoints or limits. Insofar as the measured actual values deviate from the desired values or differ by a predetermined amount, the controller 33, 35 outputs an error signal.

Die hinterlegten Soll- oder Grenzwerte können dabei entsprechend von anderen erfassten bzw. gemessenen Parametern abhängen, wie etwa von der Betriebslaufzeit des jeweiligen Ventils oder der Umgebungstemperatur im Umfeld des jeweiligen Leimventils 10. Die Umgebungstemperatur könnte beispielsweise mit einem entsprechenden Temperatursensor 42 gemessen werden, der über eine Steuerleitung 43 an die Steuerung, insbesondere an den übergeordneten Controller 33, angeschlossen ist.The stored setpoint or limit values may depend on other detected or measured parameters, such as the operating time of the respective valve or the ambient temperature in the vicinity of the respective glue valve 10. The ambient temperature could be measured, for example, with a corresponding temperature sensor 42, the a control line 43 to the controller, in particular to the higher-level controller 33, is connected.

Mit anderen Worten kann vorgesehen sein, dass die Steuerung die für die Auswertung der gemessenen Ist-Werte notwendigen Soll- oder Grenzwerte nach Maßgabe der Temperatur und/oder der Betriebsdauer und/oder eines anderen Parameters aus einer Anzahl hinterlegter Soll- oder Grenzwerte auswählt.In other words, it can be provided that the controller selects the setpoints or limit values necessary for the evaluation of the measured actual values in accordance with the temperature and / or the operating time and / or another parameter from a number of stored setpoint or limit values.

In weiterer Ausbildung der Erfindung kann vorgesehen sein, dass die Ist-Werte mit hinterlegten Grenzwerten verglichen werden, und dass bei Erreichen des Grenzwertes oder Überschreiten desselben das Fehlersignal generiert wird.In a further embodiment of the invention it can be provided that the actual values are compared with stored limit values, and that upon reaching the limit value or exceeding the same, the error signal is generated.

In Fig. 4 sind für vier Ventile 10 jeweils Kennlinien I, J, K, L dargestellt, die den jeweiligen, gemessenen Widerstandswerten der entsprechenden Ventile 10 die entsprechende Leimventiltemperatur gegenüberstellen. Mit anderen Worten ist dargestellt, welchem Spulenwiderstand 15 des jeweiligen Leimventils 10 welche Leimventiltemperatur entspricht.In Fig. 4 For each of four valves 10 characteristic curves I, J, K, L are shown which contrast the respective measured resistance values of the corresponding valves 10 with the corresponding glue valve temperature. In other words, it is shown which coil resistance 15 of the respective glue valve 10 corresponds to which glue valve temperature.

Insbesondere ist erkennbar, welche Spulenwerte des jeweiligen Leimventils 10 einer Temperatur entsprechen, die oberhalb eines kritischen Grenzwertes liegt. Wenn sich im Rahmen der Auswertung der gemessenen Widerstandswerte ergibt, dass sich die Ist-Temperatur eines der Ventile oberhalb einer kritischen Temperatur υkrit. befindet, wird das Fehlersignal erzeugt.In particular, it can be seen which coil values of the respective glue valve 10 correspond to a temperature which is above a critical limit value. If, as part of the evaluation of the measured resistance values, it results that the actual temperature one of the valves above a critical temperature υ krit . is located, the error signal is generated.

Alternativ oder zusätzlich kann im Rahmen der Auswertung vorgesehen sein, dass die Steuerung die Ist-Widerstandswerte der unterschiedlichen Leimventile 10 untereinander vergleicht. In Fig. 4 entspricht der Ist-Widerstandswert R3 des durch die Kennlinie K repräsentierten Leimventils 10 einem Temperaturwert, der um eine vorbestimmtes Maß Δυ von den Ist-Temperaturwerten der anderen Leimventile 10 abweicht, die sich aus den entsprechend annähernd zu derselben Zeit gemessenen Widerstandswerten R1, R2 bzw. R4 mithilfe der Kurven I, J bzw. L ableiten lassen.Alternatively or additionally, it can be provided in the context of the evaluation that the controller compares the actual resistance values of the different glue valves 10 with one another. In Fig. 4 the actual resistance value R 3 of the glue valve 10 represented by the characteristic curve K corresponds to a temperature value which deviates by a predetermined amount Δυ from the actual temperature values of the other glue valves 10, which are determined from the resistance values R 1 , R measured correspondingly approximately at the same time 2 or R 4 can be derived using the curves I, J and L.

In weiterer Ausbildung der Erfindung ist vorgesehen, dass für die einzelnen Leimventile 10 charakteristische Daten, wie etwa Kennlinien, die etwa abhängig von gemessenen Spulenwiderständen ein Temperaturverhalten der Leimventile beschreiben oder abhängig von gemessenen Spuleninduktivitäten Drehwinkel einer Einstellschraube des Ventils 10, jeweils in dem jeweiligen Ventil 10 zugeordneten, insbesondere an diesen angeordneten Transpondern 40 hinterlegt sind. Diese Werte können dann jeweils von mit der Steuerung verbundenen Lesegeräten 41 abgefragt und der Steuerung zugeleitet werden. Bezugszeichenliste: 10 Leimventil 37 Stromleitung 11 Ventilgehäuse 38 Winkelbereich 12 Steckergehäuse 39a Leuchtmittel 13 Ventilgehäuseinnenraum 39b Leuchtmittel 14 Elektromagnet 15 Spule A Kurvenabschnitt 16 Spulenträger A' Kurvenabschnitt 17 Ventilkammer B Kurvenabschnitt 18 Verschlussorgan B' Kurvenabschnitt 19 Schaft C Kurve 20 Verschlussmittel D Kurve 21 Ventilöffnung E Kurve 22 Ventilsitz F Kurvenabschnitt 23 Leimanschluss F' Kurvenabschnitt 24 Leimquelle G Kurve 24a Leimleitungen G' Kurve 25 Beleimungssystem H Kurve 26 Leimkanal H' Kurve 27 Anschlusskanal I Kennlinie 28 Kolbenstück J Kennlinie 29 Bauteil K Kennlinie 30 Einstellschraube L Kennlinie 31 Träger 40 Transponder 32 Kopfteil 41 Lesegerät 33 Mastercontroller 42 Temperatursensor 34 Steuerleitung 43 Steuerleitung 35 Steuerleitung 36 lokaler Controller In a further embodiment of the invention, it is provided that characteristic data for the individual glue valves 10, such as characteristic curves which describe a temperature behavior of the glue valves depending on measured coil resistances or depending on measured coil inductances, rotational angle of an adjusting screw of the valve 10, respectively in the respective valve 10 assigned, in particular arranged on these transponders 40 are deposited. These values can then each be queried by readers 41 connected to the controller and forwarded to the controller. <B> LIST OF REFERENCES: </ b> 10 glue valve 37 power line 11 valve housing 38 angle range 12 plug housing 39a Lamp 13 Valve housing interior 39b Lamp 14 electromagnet 15 Kitchen sink A curve section 16 coil carrier A ' curve section 17 valve chamber B curve section 18 closure member B ' curve section 19 shaft C Curve 20 closure means D Curve 21 valve opening e Curve 22 valve seat F curve section 23 Adhesive connection F ' curve section 24 glue source G Curve 24a glue lines G' Curve 25 gluing system H Curve 26 glue channel H' Curve 27 connecting channel I curve 28 Kolb piece J curve 29 component K curve 30 adjustment L curve 31 carrier 40 transponder 32 headboard 41 reader 33 Master controller 42 temperature sensor 34 control line 43 control line 35 control line 36 local controller

Claims (7)

  1. Method for automatically recording the valve stroke of a glue valve (10), in particular of a glue valve (10) of an apparatus for producing and/or packaging cigarettes or other smokable articles, in which the valve (10) has a component (29) at least partly consisting of magnetizable material, the position of which can be changed in order to adjust the valve stroke relative to a closure member (18) that can be moved by an electromagnet (14) of the valve (10), and which is arranged in such a way that it is located in the magnetic area of influence on the electromagnet (14) of the valve (10), in particular at least partly inside the coil (15) of the same, wherein, as a measure of the position of the component (29) and thus as a measure of the adjusted valve stroke, the current inductance of the coil (15) of the electromagnet (14) is measured, in particular with the valve (10) closed.
  2. Method according to Claim 1, characterized in that the glue valve (10) is operated cyclically with gluing phases, in which the valve (10) is open to discharge glue, and rest phases, in which the valve (10) is closed, so that no glue emerges, wherein the current values are determined in at least one, preferably in several, of the rest phases of the glue valve (10).
  3. Method according to Claim 1 or 2, characterized in that the current inductance of the valve (10) is determined in that, preferably during the at least one rest phase of the valve (10), a suitable measuring electric current, in particular an alternating current, preferably of changeable intensity, is led through the at least one coil (15) .
  4. Method according to Claim 3, characterized in that the measuring current is caused by a resonant circuit.
  5. Method according to one or more of Claims 1-4, characterized in that depending on the current value of the measured coil inductance, a first, preferably optical, signal is generated, which represents a valve stroke value permissible for the glue valve (10), or a second, likewise preferably optical signal, that is different from the first, which represents a valve stroke value that is impermissible for the glue valve (10).
  6. Method according to one or more of Claims 1-5, characterized in that the measured current value of the coil inductance or a value preferably linearly dependent on the same is displayed in particular optically, preferably on a monitor.
  7. Method according to one or more of Claims 1-6, characterized in that the target values of the measured variable, from which the temperature can be derived, and/or the target temperature values and/or the target values of the coil inductance and/or the table or the graph in which coil resistance values are assigned temperature values of the glue valve (10) are read from a transponder (40) arranged on the valve (10).
EP12007283.0A 2011-11-01 2012-10-23 Method for detecting failures and for recording the valve stroke of a glue valve Active EP2589437B1 (en)

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DE102011117295A DE102011117295A1 (en) 2011-11-01 2011-11-01 Method for detecting faults and detecting the valve lift of a glue valve

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CN103818116B (en) * 2014-02-10 2015-11-25 宁波精宏数控科技有限公司 A kind of modularization glue dispensing valve that certainly can be elevated adjustable inclination angle
CN109675766A (en) * 2018-12-29 2019-04-26 宁波卓尔汽车零部件有限公司 A kind of adhesive dispensing system
DE102020130472A1 (en) * 2020-11-18 2022-05-19 Focke & Co. (Gmbh & Co. Kg) Application device for applying a flowable medium to a substrate
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ES2762185T3 (en) 2020-05-22
EP2589437A2 (en) 2013-05-08

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