EP1611961A2 - Installation for coating a strip - Google Patents

Installation for coating a strip Download PDF

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Publication number
EP1611961A2
EP1611961A2 EP05105489A EP05105489A EP1611961A2 EP 1611961 A2 EP1611961 A2 EP 1611961A2 EP 05105489 A EP05105489 A EP 05105489A EP 05105489 A EP05105489 A EP 05105489A EP 1611961 A2 EP1611961 A2 EP 1611961A2
Authority
EP
European Patent Office
Prior art keywords
coating
force
roller
reaction force
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05105489A
Other languages
German (de)
French (fr)
Other versions
EP1611961A3 (en
EP1611961B1 (en
Inventor
Andreas Ing. Viehböck
Horst Ing. Dussing
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.)
Siemens Vai Metals Technologies GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Siemens VAI Metals Technologies GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH, Siemens VAI Metals Technologies GmbH and Co filed Critical Voest Alpine Industrienlagenbau GmbH
Priority to PL05105489T priority Critical patent/PL1611961T3/en
Publication of EP1611961A2 publication Critical patent/EP1611961A2/en
Publication of EP1611961A3 publication Critical patent/EP1611961A3/en
Application granted granted Critical
Publication of EP1611961B1 publication Critical patent/EP1611961B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0873—Controlling means responsive to conditions of the liquid or other fluent material, of the ambient medium, of the roller or of the work
    • B05C1/0878—Controlling means responsive to conditions of the liquid or other fluent material, of the ambient medium, of the roller or of the work responsive to the pressure applied between two rollers, e.g. between the coating roller and a backing roller or between the coating roller and a dosing roller
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • 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
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers

Definitions

  • the invention relates to a coil coating device for applying a coating agent to a moving metal strip in a predetermined layer thickness with a supported on a support carriage coating roller and the support carriage associated adjustment, with the coating roller with a certain contact force or a certain setting against the moving metal belt or another Coating roller is employed regulated, and a method for applying a coating agent having a predetermined layer thickness on a moving metal strip.
  • a belt coating device comprises at least two support carriages which are independent of one another, each carrying carriage carrying a coating roller.
  • the invention relates to an adjustment device for a coating roller supported on a support carriage in a belt coater for applying a coating agent to a moving metal belt in a predetermined layer thickness with high control accuracy and the use of this adjustment device for compensating for layer thickness variations caused by varying conditions in the application process, e.g. Roundness deviation, games, etc., on a coating roll.
  • Tape coater is used to apply a coating agent, such as lakes or chemicals, to a continuously moving metal strip in a predetermined uniform layer thickness, with the layer thickness being kept within close tolerances for quality reasons.
  • the coating agent is applied by means of coating rolls, wherein in most cases several co-operating coating rolls, such as an applicator roll, an immersion roll and optionally an intermediate roll or a dossier roll, are used.
  • the applicator role for example, a rubber roller is rotatably supported on an adjustable support carriage and with this to the metal belt with a constant path or a predetermined force adjustable.
  • This employment on the metal strip takes place with a AnstellISSISS, for example a pressure medium cylinder, with one for a certain layer thickness necessary adjusting force is applied regulated.
  • the coating roll can be adjusted to a certain setting position.
  • a belt coating device immersed dipping roller in a coating agent, which is located in a reservoir, and takes on the rotational movement continuously coating agent.
  • the dipping roller is set against an intermediate roller with a predetermined contact force and transmits a certain amount of the coating agent to the intermediate roller depending on the setting force and other influencing factors (for example the flowability of the coating agent).
  • the coating agent is transferred during the mutual unwinding of the intermediate roll on an applicator roll, wherein the intermediate roller is pressed with a predetermined contact force to the applicator roll.
  • the application roller is in turn employed to a continuously moving metal strip and transfers the coating agent in a certain layer thickness on this.
  • the applicator role can also be firmly positioned on a support frame of the coil coating device.
  • a strip coating device of the type described above with two co-acting coating rolls, a dipping roll and an applicator roll is also known from US-A 5,413,806, in which the employment of the applicator roll to the metal strip, or the employment of the dipping roll to the applicator roll by hydraulic actuators he follows.
  • the adjustment of the layer thickness of the coating agent on the metal strip takes place here via the regulation of the contact pressure or the contact force between the application roller and the dipping roller.
  • All hitherto known adjusting devices in coil coating devices are based essentially on the use of electric servomotors in conjunction with ball screw spindles or on the application of electric stepper motors combined with a geared motor and ball screw spindles or on manual operation of a hand crank or on the application of hydraulic motors and servo valves.
  • the actual value of the coating thickness is determined directly with layer thickness sensors or indirectly with pressure measuring devices, these measuring devices are arranged at different positions of the coil coating system and connected via data lines with control devices and / or a computer, from which control signals are passed to the adjustment. All of these systems are self-locking, in particular because of their mechanical components and hydraulic control lines between control blocks and the hydraulic adjusting cylinders and are therefore not suitable for dynamic control, or limit this in their control accuracy.
  • the object of the present invention is therefore to avoid these disadvantages and difficulties of the known prior art and to propose a belt coating device with an adjusting device and a method for applying a coating agent with a predetermined layer thickness to a metal strip, by the application of a coating agent at conventional commercial coating speeds much more uniform and within narrower tolerance ranges than previously possible. Furthermore, the quality of the coated metal strip should be achieved at high coating speed by balancing out any resulting force fluctuations, for example caused by roll eccentricity, hardness differences in the roll coating and the like.
  • the adjusting device is designed as a compact unit and this compact unit comprises the Anstellkraft effecting drive means and the Anstellkraft monitoring measuring devices, all hydraulic control lines are arranged on the drive means within the compact unit.
  • the drive device comprises at least one hydraulic setting cylinder formed by a cylinder-piston unit, a valve plate and a pressure medium control unit, preferably at least one servo valve and the measuring devices comprise a force or pressure measuring device and / or a displacement measuring device.
  • the pressure medium control unit may also comprise at least one proportional valve. Due to the design of the adjustment as a compact unit, long hydraulic control lines, as they were previously used between a hydraulic control block and the adjusting cylinder on the frame construction of the band stacker. The now still remaining within the compact assembly hydraulic control lines are essentially limited to through holes for the hydraulic fluid between servo valves and valve plate and between the valve plate and hydraulic adjusting cylinder. The substantially reduced pressure losses thereby enable a substantial increase in the control accuracy of the contact force between the applicator roll and the further coating roll directly in contact with it.
  • each support tab of the support carriage is associated with an adjustment of the same type according to the invention.
  • Each of these adjusting devices comprises a hydraulic cylinder on which control valves and sensors are constructed directly.
  • This system allows the setting of a uniform contact force over the longitudinal extent of the coating roll and thus a uniform layer thickness of the coating agent over the bandwidth.
  • the paint layer thickness can be regulated in a closed loop.
  • a major advantage of this unit is the minimization of disturbances in the control loop by the elimination of connecting hydraulic control lines and thus resulting vibration influences on the control loop.
  • An arrangement of a force-measuring device for measuring the setting forces which is preferred from a constructive and metrological point of view, results if the hydraulic setting cylinder comprises a piston rod which is connected to the carrier carriage of the respective coating roller via a connecting element and the force measuring device for detecting the reaction force of the respective coating roller in this connecting element , is preferably arranged on the piston rod.
  • the connecting element is expediently designed as a joint, whereby additional clamping forces influencing the measurement results are avoided, and the force measuring device is for detecting the reaction force of the respective coating roller arranged in this joint on the piston rod.
  • the force measuring device is preferably formed by a load cell.
  • the force measurement for determining the reaction force of the respective coating roll can also be replaced by a pressure measurement.
  • the pressure measuring device is arranged in the pressure medium.
  • a displacement measuring device is expediently integrated or arranged externally in the hydraulic setting cylinder and permits position detection and position control of the respective coating roller relative to the metal strip or relative to a further coating roller or relative to a belt deflection roller in the belt coating device.
  • the path measuring device is used to control the product-dependent operating position (for example the operating position as a function of the strip thickness) of the respective coating roller.
  • Each adjustment is connected to compensate for leakage losses via a hydraulic supply line to a central pressure medium supply.
  • data lines connect a central process computer or a corresponding control device with the servo valves of the pressure medium control unit and the measuring devices within the adjusting device.
  • all adjusting devices for coating rollers carrying carrying carriages are connected via data lines to a process computer monitoring the entire coating process.
  • the trained as a compact unit adjustment is particularly suitable for compensating for thickness variations or pressure fluctuations on a coating roll resulting layer thickness deviations.
  • the invention further comprises a method for applying a coating agent having a predetermined layer thickness on a moving metal strip in a coil coating device, wherein a relatively movable with an adjustment coating roller with a predetermined target value of a contact force or to a predetermined Anstellposition to the moving metal belt or a another coating role is regulated regulated.
  • a relatively movable with an adjustment coating roller with a predetermined target value of a contact force or to a predetermined Anstellposition to the moving metal belt or a another coating role is regulated regulated.
  • the adjusting device designed according to the invention it is possible to react very quickly and precisely to fluctuations in the reaction forces retroacting from the coating roller.
  • periodically recurring nominal value deviations of the reaction force in particular with the rotational frequency of the coating roller correlating, continuously recurring nominal value deviations, can be determined in the arithmetic unit and in response to these continuously recurring nominal value deviations the angular position of the coating roller to be supplied to the actual value curve of this reaction force gleichmä Odes correction signal an adjustment.
  • This allows periodic fluctuations in the reaction force, which occur for example due to eccentricity of the coating roll, to be filtered out and counteracted in a targeted manner by means of a corrected setting force coordinated therewith.
  • An advantageous embodiment of the method is that periodically recurring setpoint deviations of the reaction force already before the beginning of Applying a coating agent are detected and at least at the beginning of the application of a coating agent a the actual value curve of this reaction force gleichmä touchdes correction signal is supplied to an adjustment.
  • This makes it possible to determine the current actual state of the characterizing characteristics of a coating system, such as hardness differences in the roller coating, but also roundness of the coating rolls or games in the system, before the coating process and specify the starting unit via the computing unit (controller). These parameters are determined repeatedly during the coating process at intervals and transmitted via appropriate correction signals to the adjustment.
  • FIG. 1 A possible embodiment of a strip coating device according to the invention for coating both sides of a metal strip with a colored lacquer is illustrated schematically in FIG. 1 in a sectional view.
  • a guide roller 2 is rotatably mounted in a firmly anchored on a foundation central machine frame 1.
  • the metal strip 3 to be coated is guided under strip tension around the deflection roller 2 to a winding station 5 and, in successive steps, the paint application is carried out on the upper side and the lower side of the metal strip.
  • a support carriage 7 is slidably supported on obliquely extending longitudinal guides 8 in the arrow direction. The sliding movement takes place by means of an adjusting device 9, which is coupled to a pivot 10 with the support carriage 7 and which is fixed in a bracket 11 on the upper side frame 6 stationary.
  • an adjusting device 9 which is coupled to a pivot 10 with the support carriage 7 and which is fixed in a bracket 11 on the upper side frame 6 stationary.
  • On the support carriage 7 designed as an application roller 12 coating roller 13 is rotatable in support bearings 14 supported, wherein each of the arranged at the ends of the application roller support bearing 14 is mounted on a respective support bracket 15 of the support carriage 7 and each support bracket 15 is associated with an adjustment 9.
  • the applicator roll 12 can be adjusted in a controlled manner, taking into account the strip thickness of the metal strip to be coated on this or to the deflection roller 2.
  • a further supporting carriage 16 is slidably supported on longitudinal guides 17, wherein the sliding movement takes place with an adjusting device 18 which is coupled to a pivot 19 with the support carriage 16 and which is fixed in a bracket 20 on the support carriage 7 fixed thereto.
  • the support carriage 16 carries a rotatably supported in support bearings 21 coating roller 22, which is designed as a dipping roller 23 and immersed in a coating agent container 24, in which, for example, color varnish is.
  • the basic structure of the support carriage 16 corresponds to that of the support carriage 7.
  • the dipping roller 23 can be adjusted in a force-controlled manner to the application roller 12.
  • a further support carriage 25 is longitudinally displaceably supported on longitudinal guides 26, wherein the sliding movement takes place with an adjusting device 27 which is coupled to a pivot 28 with the support carriage 25 and which is fixed to a bracket 29 on the support carriage 16 fixed thereto.
  • the support carriage 25 carries a rotatably supported in support bearings 21 coating roll 30, which is designed as a dossier 31.
  • the basic structure of the support carriage 25 corresponds to that of the support carriage 16 or 7. With the adjusting device 27, the dossier roller 31 is force-controlled pressed against the dipping roller 23 and stripped of the dipping roller excess amount of paint again.
  • a coating roller 35 is rotatably supported in support bearings 36, wherein the support bearings 36 are firmly anchored on the lower side frame 34.
  • the coating roller 35 is in this case set in a position in which the metal strip to be coated is pressed against the coating roll with a contact force as a function of the strip tension.
  • a support carriage 37 is slidably supported on obliquely extending longitudinal guides 38 in the arrow direction.
  • the sliding movement takes place with an adjusting device 39, which is coupled to a pivot 40 with the support carriage 37 and which is fixed in a bracket 41 on the lower frame 34 fixed.
  • the support carriage 37 carries a support roller 42 rotatably supported coating roller 43, which is formed as a dipping roller 44 and immersed in a coating agent container 45, in which, for example, color varnish is.
  • the basic structure of the support carriage 37 corresponds for example to that of the support carriage 7.
  • the adjustment device 39 the dipping roller 23 can be adjusted in a force-controlled manner to the coating roller 35.
  • a lifting roller 48 is rotatably and liftably supported in one of a pressure medium cylinder 49 actuated pivot bracket 50.
  • the metal strip is raised so far that the band weld the applicator roll 35 can pass without contact.
  • the support carriage 7 is briefly withdrawn in the course of a band weld and employed again. This avoids damage to the sensitive surface of the application rollers.
  • This self-contained adjusting device comprises a drive device 53 and in this structurally directly integrated measuring devices 54.
  • Core unit of this drive device 53 is a hydraulic adjusting cylinder 55, which essentially comprises a cylinder-piston unit.
  • a valve plate 56 is attached, which corresponds to a conventional control block in a hydraulic supply system, but without the need for longer hydraulic control lines between the Anstellzylinder and the valve plate.
  • a pressure medium control unit 57 forming servo valves are arranged, with which the movement of the reciprocating piston, not shown in the adjusting cylinder 55 is controlled.
  • Only transfer channels for the hydraulic oil are provided between the adjusting cylinder, the valve plate and the servo valves of the pressure medium control unit and thus reduce the length of the hydraulic control lines to a minimum.
  • the support carriages 6, 16, 25, 37 described above with reference to FIG. 1 are connected to the adjustment devices 9, 18, 27, 39 formed as a compact structural unit 52 by connecting elements 10, 19, 28, 40, which are configured as joints and of which a connecting element 10 is shown in Fig. 2.
  • This configured as a hinge connecting element can either a pivoting movement in a plane or a pivoting movement in two planes or spatially.
  • a force measuring device 59 is positioned, with which the contact force of the respective coating roller can be measured.
  • a force measuring device As a force measuring device, a pressure cell is used. On Anstellzylinder 55 a calibrated to the piston position displacement measuring device 60 is further grown. The force measuring device consists in a pressure measuring cell. The servo valve 57, the force measuring device 59 and the path measuring device 60 are connected via data lines with a central rich unit 61, from which the movements are coordinated and regulated at the coating device. Primarily based on production characteristics, such as the strip thickness or the position of strip welds from the production tracking, the adjustment of the operating position of the individual coating rolls is carried out in a regulated manner, incorporating the measured values of the displacement measuring devices.
  • the coating thickness is kept largely constant by force control, wherein in particular the contact force between applicator rolls and dipping roll is measured continuously and these measured values are taken into account taking into account other characteristic values of the coating composition or measured values of an additional layer thickness measurement.
  • force control wherein in particular the contact force between applicator rolls and dipping roll is measured continuously and these measured values are taken into account taking into account other characteristic values of the coating composition or measured values of an additional layer thickness measurement.
  • Corresponding control signals are given by the arithmetic unit to the servo valve.
  • the increased control accuracy allows a faster response to short-term force variations caused by the coating rolls.
  • cyclic force fluctuations which are caused by roller eccentricity, hardness differences in the roller coating, and the like, lead to deviations in the desired layer thickness of the coating, thus cyclically recurring layer thickness variations.
  • the invention is not limited to a coating device of the type described above.
  • the metal strip to be coated can be guided in any manner through the coating device and also the coating rollers can be formed arbitrarily in their number, formation of the mantle surface, type of employment to the metal strip and in their interaction.

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  • Coating Apparatus (AREA)

Abstract

The band coating device for the applying of a coating medium onto a moving metal band has coating roller supported on a carriage, and an adjusting device allocated to the carriage. The adjusting device is constructed as a compact modular unit (52) which is equipped with drive units (53) applying the adjusting force and with measuring devices (54) monitoring it. All the hydraulic control lines on the drive units are located inside the compact modular unit. An independent claim is included for a method for the applying of a coating medium with a predetermined thickness onto a moving metal band in a band coating device.

Description

Die Erfindung betrifft eine Bandbeschichtungseinrichtung zum Aufbringen eines Beschichtungsmittels auf ein bewegtes Metallband in einer vorbestimmten Schichtdicke mit einer auf einem Tragschlitten abgestützten Beschichtungsrolle und eine dem Tragschlitten zugeordnete Verstelleinrichtung, mit der die Beschichtungsrolle mit einer bestimmten Anstellkraft oder eine bestimmten Anstellposition gegen das bewegte Metallband oder eine weitere Beschichtungsrolle geregelt angestellt ist, sowie ein Verfahren zum Aufbringen eines Beschichtungsmittels mit vorbestimmter Schichtdicke auf ein bewegtes Metallband.The invention relates to a coil coating device for applying a coating agent to a moving metal strip in a predetermined layer thickness with a supported on a support carriage coating roller and the support carriage associated adjustment, with the coating roller with a certain contact force or a certain setting against the moving metal belt or another Coating roller is employed regulated, and a method for applying a coating agent having a predetermined layer thickness on a moving metal strip.

Zumeist umfasst eine Bandbeschichtungseinrichtung zumindest zwei voneinander unabhängige Tragschlitten, wobei jeder Tragschlitten eine Beschichtungsrolle trägt.In most cases, a belt coating device comprises at least two support carriages which are independent of one another, each carrying carriage carrying a coating roller.

Besonders betrifft die Erfindung eine Verstelleinrichtung für eine auf einem Tragschlitten abgestützte Beschichtungsrolle in einer Bandbeschichtungsanlage zum Aufbringen eines Beschichtungsmittels auf ein bewegtes Metallband in einer vorbestimmten Schichtdicke mit hoher Regelgenauigkeit und die Verwendung dieser Verstelleinrichtung zum Ausregeln von Schichtdickenabweichungen hervorgerufen durch varierende Bedingungen beim Auftragsvorgang, wie z.B. Rundheitsabweichung, Spiele, etc., an einer Beschichtungsrolle.More particularly, the invention relates to an adjustment device for a coating roller supported on a support carriage in a belt coater for applying a coating agent to a moving metal belt in a predetermined layer thickness with high control accuracy and the use of this adjustment device for compensating for layer thickness variations caused by varying conditions in the application process, e.g. Roundness deviation, games, etc., on a coating roll.

Bandbeschichtungseinrichtungen werden eingesetzt, um ein Beschichtungsmittel, wie beispielsweise Farblacke oder Chemikalien, in einer vorbestimmten gleichmäßigen Schichtdicke auf ein kontinuierlich bewegtes Metallband aufzutragen, wobei die Schichtdicke aus Qualitätsgründen innerhalb enger Toleranzen gehalten werden muss. Das Aufbringen des Beschichtungsmittels erfolgt durch Beschichtungsrollen, wobei zumeist mehrere zusammenwirkende Beschichtungsrollen, wie einer Auftragrolle, einer Tauchrolle und gegebenenfalls einer Zwischenrolle oder einer Dossierrolle, zum Einsatz kommen. Die Auftragrolle, beispielsweise einer Gummiwalze, ist auf einem verstellbaren Tragschlitten drehbar abgestützt und mit diesem an das Metallband mit konstantem Weg oder einer vorbestimmten Kraft anstellbar. Diese Anstellung an das Metallband erfolgt mit einer Anstelleinrichtung, beispielsweise einem Druckmittelzylinder, mit dem eine für eine bestimmte Schichtdicke notwendige Anstellkraft geregelt aufgebracht wird. Alternativ kann die Beschichtungsrolle weggeregelt auf eine bestimmte Anstellposition eingestellt werden.Tape coater is used to apply a coating agent, such as lakes or chemicals, to a continuously moving metal strip in a predetermined uniform layer thickness, with the layer thickness being kept within close tolerances for quality reasons. The coating agent is applied by means of coating rolls, wherein in most cases several co-operating coating rolls, such as an applicator roll, an immersion roll and optionally an intermediate roll or a dossier roll, are used. The applicator role, for example, a rubber roller is rotatably supported on an adjustable support carriage and with this to the metal belt with a constant path or a predetermined force adjustable. This employment on the metal strip takes place with a Anstelleinrichtung, for example a pressure medium cylinder, with one for a certain layer thickness necessary adjusting force is applied regulated. Alternatively, the coating roll can be adjusted to a certain setting position.

Bei einer bekannten Ausführungsform einer Bandbeschichtungseinrichtung taucht eine Tauchrolle in ein Beschichtungsmittel, welches sich in einem Vorratsbehälter befindet, ein und nimmt bei der Drehbewegung kontinuierlich Beschichtungsmittel auf. Die Tauchrolle ist mit einer vorbestimmten Anstellkraft an eine Zwischenrolle angestellt und überträgt in Abhängigkeit von der Anstellkraft und weiteren Einflussfaktoren (z.B. die Fließfähigkeit des Beschichtungsmittels) eine bestimmte Menge des Beschichtungsmittels an die Zwischenrolle. In einem weiteren Schritt wird das Beschichtungsmittel während des gegenseitigen Abrollens der Zwischenrolle auf eine Auftragrolle übertragen, wobei die Zwischenrolle mit einer vorbestimmten Anstellkraft an die Auftragrolle angepresst wird. Die Auftragrolle ist ihrerseits an ein kontinuierlich bewegtes Metallband angestellt und überträgt das Beschichtungsmittel in einer bestimmten Schichtdicke auf dieses. Die Auftragrolle kann aber auch auf einem Tragrahmen der Bandbeschichtungseinrichtung fest positioniert sein.In a known embodiment of a belt coating device immersed dipping roller in a coating agent, which is located in a reservoir, and takes on the rotational movement continuously coating agent. The dipping roller is set against an intermediate roller with a predetermined contact force and transmits a certain amount of the coating agent to the intermediate roller depending on the setting force and other influencing factors (for example the flowability of the coating agent). In a further step, the coating agent is transferred during the mutual unwinding of the intermediate roll on an applicator roll, wherein the intermediate roller is pressed with a predetermined contact force to the applicator roll. The application roller is in turn employed to a continuously moving metal strip and transfers the coating agent in a certain layer thickness on this. The applicator role can also be firmly positioned on a support frame of the coil coating device.

Ein derartiges, einen möglichen prinzipiellen Aufbau einer Bandbeschichtungsanlage darstellendes System ist aus der US-A 5,743,964 bereits bekannt. Die Auftragrolle ist in Lagerböcken drehbar gelagert und auf einem Tragschlitten abgestützt. In den Lagergehäusen sind Drucksensoren eingebettet, mit denen auftretende Reaktionskräfte auf die Beschichtungsrollen in ihrer räumlichen Auswirkung online kontinuierlich gemessen und einer Online-Auswertung zugeführt werden. Damit können aus den Messwerten Steuersignale für die Regelung des Anpressdruckes bzw. einer Anstellkraft und damit für die angestrebte Ziel-Schichtdicke des Beschichtungsmittels generiert werden. Die Anstellung der Auftragrolle erfolgt hierbei durch elektromechanische Mittel, wie einem Schrittmotor mit angekuppelter Kugelgewindespindel. In gleicher Weise erfolgt eine Regelung des Anpressdruckes oder der Anstellkraft zwischen der Tauchrolle und der Zwischenrolle oder zwischen der Zwischenrolle und der Auftragrolle.Such a, a possible basic structure of a coil coating system representing system is already known from US-A 5,743,964. The applicator roll is rotatably mounted in bearing blocks and supported on a support carriage. In the bearing housings pressure sensors are embedded with which occurring reaction forces on the coating rollers in their spatial effect online continuously measured and fed to an online evaluation. This can be generated from the measured values control signals for the regulation of the contact pressure or a contact force and thus for the desired target layer thickness of the coating composition. The employment of the job role is done by electromechanical means, such as a stepper motor with coupled ball screw. In the same way, a regulation of the contact pressure or the contact force between the dipping roller and the intermediate roller or between the intermediate roller and the application roller.

Eine Bandbeschichtungseinrichtung der eingangs beschriebenen Art mit zwei zusammen wirkenden Beschichtungsrollen, einer Tauchrolle und einer Auftragrolle, ist auch aus der US-A 5,413,806 bekannt, bei der die Anstellung der Auftragrolle an das Metallband, bzw. die Anstellung der Tauchrolle an die Auftragrolle durch hydraulische Aktuatoren erfolgt. Die Einstellung der Schichtdicke des Beschichtungsmittels auf dem Metallband erfolgt hier über die Regelung des Anpressdruckes bzw. der Kontaktkraft zwischen der Auftragrolle und der Tauchrolle.A strip coating device of the type described above with two co-acting coating rolls, a dipping roll and an applicator roll is also known from US-A 5,413,806, in which the employment of the applicator roll to the metal strip, or the employment of the dipping roll to the applicator roll by hydraulic actuators he follows. The adjustment of the layer thickness of the coating agent on the metal strip takes place here via the regulation of the contact pressure or the contact force between the application roller and the dipping roller.

Alle bisher bekannten Verstelleinrichtungen in Bandbeschichtungseinrichtungen beruhen im Wesentlichen auf der Anwendung von elektrischen Servomotoren in Verbindung mit Kugelgewindespindeln oder auf der Anwendung elektrischen Schrittmotoren kombiniert mit einem Getriebemotor und Kugelgewindespindeln oder auf manuelle Betätigung einer Handkurbel oder auf die Anwendung von hydraulischen Motoren und Servoventilen. Der Istwert der Beschichtungsdicke wird auf direktem Weg mit Schichtdickensensoren oder indirekt mit Druckmesseinrichtungen ermittelt, wobei diese Messeinrichtungen an verschiedenen Positionen der Bandbeschichtungsanlage angeordnet und über Datenleitungen mit Regeleinrichtungen und/oder einem Rechner verbunden sind, von dem ausgehend Steuersignale an die Verstelleinrichtungen geleitet werden. Alle diese Systeme wirken insbesondere wegen ihrer mechanischen Komponenten und hydraulischen Steuerleitungen zwischen Steuerblöcken und den hydraulischen Verstellzylindern selbsthemmend und sind daher für eine dynamische Regelung nicht geeignet, bzw. beschränken diese in ihrer Regelgenauigkeit.All hitherto known adjusting devices in coil coating devices are based essentially on the use of electric servomotors in conjunction with ball screw spindles or on the application of electric stepper motors combined with a geared motor and ball screw spindles or on manual operation of a hand crank or on the application of hydraulic motors and servo valves. The actual value of the coating thickness is determined directly with layer thickness sensors or indirectly with pressure measuring devices, these measuring devices are arranged at different positions of the coil coating system and connected via data lines with control devices and / or a computer, from which control signals are passed to the adjustment. All of these systems are self-locking, in particular because of their mechanical components and hydraulic control lines between control blocks and the hydraulic adjusting cylinders and are therefore not suitable for dynamic control, or limit this in their control accuracy.

Aufgabe der vorliegenden Erfindung ist es daher, diese Nachteile und Schwierigkeiten des bekannten Standes der Technik zu vermeiden und eine Bandbeschichtungseinrichtung mit einer Verstelleinrichtung und ein Verfahren zum Aufbringen eines Beschichtungsmittels mit vorbestimmter Schichtdicke auf ein Metallband vorzuschlagen, durch die der Auftrag eines Beschichtungsmittels bei üblichen kommerziellen Beschichtungsgeschwindigkeiten wesentlich gleichmäßiger und innerhalb engerer Toleranzbereiche als bisher möglich ist. Weiters soll die Qualität des beschichteten Metallbandes bei hoher Beschichtungsgeschwindigkeit durch Ausregeln aller entstehenden Kraftschwankungen, beispielsweise hervorgerufen durch Walzenexzentrizität, Härteunterschiede in der Rollenbeschichtung und ähnlichem, erreicht werden.The object of the present invention is therefore to avoid these disadvantages and difficulties of the known prior art and to propose a belt coating device with an adjusting device and a method for applying a coating agent with a predetermined layer thickness to a metal strip, by the application of a coating agent at conventional commercial coating speeds much more uniform and within narrower tolerance ranges than previously possible. Furthermore, the quality of the coated metal strip should be achieved at high coating speed by balancing out any resulting force fluctuations, for example caused by roll eccentricity, hardness differences in the roll coating and the like.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Verstelleinrichtung als kompakte Baueinheit ausgebildet ist und diese kompakte Baueinheit die Anstellkraft bewirkende Antriebseinrichtungen und die Anstellkraft überwachende Messeinrichtungen umfasst, wobei alle hydraulischen Steuerleitungen an der Antriebseinrichtung innerhalb der kompakten Baueinheit angeordnet sind.This object is achieved in that the adjusting device is designed as a compact unit and this compact unit comprises the Anstellkraft effecting drive means and the Anstellkraft monitoring measuring devices, all hydraulic control lines are arranged on the drive means within the compact unit.

Nach einer bevorzugten Ausgestaltung der Verstelleinrichtung umfasst die Antriebseinrichtung mindestens einen von einer Zylinder-Kolben-Einheit gebildeten hydraulischen Anstellzylinder, eine Ventilplatte und eine Druckmittelsteuereinheit, vorzugsweise mindestens ein Servoventil und es umfassen die Messeinrichtungen eine Kraft- oder Druckmesseinrichtung und/oder eine Wegmesseinrichtung. Die Druckmittelsteuereinheit kann auch mindestens ein Proportionalventil umfassen. Durch die Ausbildung der Verstelleinrichtung als kompakte Baueinheit, entfallen lange hydraulische Steuerleitungen, wie sie bisher zwischen einem hydraulischen Steuerblock und dem Anstellzylinder an der Rahmenkonstruktion der Bandschichtungseinrichtung eingesetzt wurden. Die nunmehr innerhalb der kompakten Baugruppe noch verbleibenden hydraulischen Steuerleitungen beschränken sich im Wesentlichen auf Durchgangsöffnungen für das Hydraulikmittel zwischen Servoventilen und Ventilplatte und zwischen Ventilplatte und hydraulischem Anstellzylinder. Die dadurch wesentlich herabgesetzten Druckverluste ermöglichen eine wesentliche Steigerung der Regelgenauigkeit der Anstellkraft zwischen der Auftragrolle und der mit ihr unmittelbar in Kontakt stehenden weiteren Beschichtungsrolle.According to a preferred embodiment of the adjusting device, the drive device comprises at least one hydraulic setting cylinder formed by a cylinder-piston unit, a valve plate and a pressure medium control unit, preferably at least one servo valve and the measuring devices comprise a force or pressure measuring device and / or a displacement measuring device. The pressure medium control unit may also comprise at least one proportional valve. Due to the design of the adjustment as a compact unit, long hydraulic control lines, as they were previously used between a hydraulic control block and the adjusting cylinder on the frame construction of the band stacker. The now still remaining within the compact assembly hydraulic control lines are essentially limited to through holes for the hydraulic fluid between servo valves and valve plate and between the valve plate and hydraulic adjusting cylinder. The substantially reduced pressure losses thereby enable a substantial increase in the control accuracy of the contact force between the applicator roll and the further coating roll directly in contact with it.

Auf zwei im Abstand zueinander parallel ausgerichteten Traglaschen eines verschiebbaren Tragschlittens ist eine Beschichtungsrolle in zwei Lagerböcken abgestützt, wobei jeder Traglasche des Tragschlittens eine Verstelleinrichtung der gleichen erfindungsgemäßen Art zugeordnet ist. Jede dieser Verstelleinrichtungen umfasst einen hydraulischen Zylinder, an dem Regelventile und Geber unmittelbar aufgebaut sind. Dieses System ermöglicht die Einstellung einer gleichmäßigen Anpresskraft über die Längserstreckung der Beschichtungsrolle und damit einer gleichmäßigen Schichtdicke des Beschichtungsmittels über die Bandbreite. Generell kann die Lackschichtdicke in einem geschlossenen Regelkreis geregelt werden. Ein wesentlicher Vorteil dieser Baueinheit liegt in der Minimierung von Störgrößen im Regelkreis durch den Entfall verbindender hydraulischer Steuerleitungen und damit entstehender Schwingungseinflüsse auf den Regelkreis.On two spaced parallel aligned support tabs of a sliding support carriage, a coating roll is supported in two bearing blocks, each support tab of the support carriage is associated with an adjustment of the same type according to the invention. Each of these adjusting devices comprises a hydraulic cylinder on which control valves and sensors are constructed directly. This system allows the setting of a uniform contact force over the longitudinal extent of the coating roll and thus a uniform layer thickness of the coating agent over the bandwidth. In general, the paint layer thickness can be regulated in a closed loop. A major advantage of this unit is the minimization of disturbances in the control loop by the elimination of connecting hydraulic control lines and thus resulting vibration influences on the control loop.

Eine aus konstruktiver und messtechnischer Sicht bevorzugte Anordnung einer Kraftmesseinrichtung zur Messung der Anstellkräfte ergibt sich, wenn der hydraulische Anstellzylinder eine Kolbenstange umfasst, die mit dem Tragschlitten der jeweiligen Beschichtungsrolle über ein Verbindungselement verbunden ist und die Kraftmesseinrichtung zur Erfassung der Reaktionskraft der jeweiligen Beschichtungsrolle in diesem Verbindungselement, vorzugsweise an der Kolbenstange, angeordnet ist. Das Verbindungselement ist zweckmäßig als Gelenk ausgebildet, wodurch zusätzliche die Messergebnisse beeinflussende Spannkräfte vermieden werden, und die Kraftmesseinrichtung zur Erfassung der Reaktionskraft der jeweiligen Beschichtungsrolle ist in diesem Gelenk an der Kolbenstange angeordnet. Die Kraftmesseinrichtung ist vorzugsweise von einer Kraftmesszelle gebildet.An arrangement of a force-measuring device for measuring the setting forces, which is preferred from a constructive and metrological point of view, results if the hydraulic setting cylinder comprises a piston rod which is connected to the carrier carriage of the respective coating roller via a connecting element and the force measuring device for detecting the reaction force of the respective coating roller in this connecting element , is preferably arranged on the piston rod. The connecting element is expediently designed as a joint, whereby additional clamping forces influencing the measurement results are avoided, and the force measuring device is for detecting the reaction force of the respective coating roller arranged in this joint on the piston rod. The force measuring device is preferably formed by a load cell.

Die Kraftmessung zur Ermittlung der Reaktionskraft der jeweiligen Beschichtungsrolle kann auch durch eine Druckmessung ersetzt werden. In diesem Fall ist die Druckmesseinrichtung im Druckmittel angeordnet.The force measurement for determining the reaction force of the respective coating roll can also be replaced by a pressure measurement. In this case, the pressure measuring device is arranged in the pressure medium.

Eine Wegmesseinrichtung ist zweckmäßig in den hydraulischen Anstellzylinder integriert oder extern angeordnet und ermöglicht eine Positionserfassung und eine Positionsansteuerung der jeweiligen Beschichtungsrolle relativ zum Metallband oder relativ zu einer weiteren Beschichtungsrolle oder relativ zu einer Bandumlenkrolle in der Bandbeschichtungseinrichtung. In Verbindung mit einer Regeleinrichtung, im speziellen mit einem Prozessrechner, wird die Wegmesseinrichtung zur Ansteuerung der produktabhängigen Betriebsposition (z.B. die Betriebsposition in Abhängigkeit von der Banddicke) der jeweiligen Beschichtungsrolle herangezogen.A displacement measuring device is expediently integrated or arranged externally in the hydraulic setting cylinder and permits position detection and position control of the respective coating roller relative to the metal strip or relative to a further coating roller or relative to a belt deflection roller in the belt coating device. In conjunction with a control device, in particular with a process computer, the path measuring device is used to control the product-dependent operating position (for example the operating position as a function of the strip thickness) of the respective coating roller.

Als Wegmesseinrichtungen können handelsübliche Linearmesseinrichtungen eingesetzt werden.Commercially available linear measuring devices can be used as path measuring devices.

Jede Verstelleinrichtung ist zur Kompensation von Leckageverlusten über eine hydraulische Versorgungsleitung an eine zentrale Druckmittelversorgung angeschlossen. Weiters verbinden Datenleitungen einen zentralen Prozessrechner oder eine entsprechende Regeleinrichtung mit den Servoventilen der Druckmittelsteuereinheit und den Messeinrichtungen innerhalb der Verstelleinrichtung. Vorzugsweise sind alle Verstelleinrichtungen für Beschichtungsrollen tragende Tragschlitten über Datenleitungen mit einem den gesamten Beschichtungsvorgang überwachenden Prozessrechner verbunden.Each adjustment is connected to compensate for leakage losses via a hydraulic supply line to a central pressure medium supply. Furthermore, data lines connect a central process computer or a corresponding control device with the servo valves of the pressure medium control unit and the measuring devices within the adjusting device. Preferably, all adjusting devices for coating rollers carrying carrying carriages are connected via data lines to a process computer monitoring the entire coating process.

Durch die Minimierung von Störgrößen im Regelkreis, die Verkürzung von Reaktionszeiten des Reglers und eine Erhöhung der Messgenauigkeit der Anpresskraft können Kraftschwankungen, deren Ursache in der Rollenexzentrizität, der Rollenhärte, einem unrunden Abschliff der Beschichtungsrolle oder ähnlichem, liegen, messtechnisch erfasst und durch eine dynamische Regelung weitgehend kompensiert werden. Insofern eignet sich die als kompakte Baueinheit ausgebildete Verstelleinrichtung im besonderen Maße zum Ausregeln von durch Kraftschwankungen oder Druckschwankungen an einer Beschichtungsrolle entstehende Schichtdickenabweichungen.By minimizing disturbance variables in the control loop, shortening the reaction times of the controller and increasing the measuring accuracy of the contact force force fluctuations, the cause of which in the roller eccentricity, the roller hardness, a non-circular grinding of the coating roll or the like, are detected by metrology and by a dynamic control be largely compensated. In this respect, the trained as a compact unit adjustment is particularly suitable for compensating for thickness variations or pressure fluctuations on a coating roll resulting layer thickness deviations.

Zur Lösung der gestellten Aufgabe umfasst die Erfindung weiters ein Verfahren zum Aufbringen eines Beschichtungsmittels mit vorbestimmter Schichtdicke auf ein bewegtes Metallband in einer Bandbeschichtungseinrichtung, wobei eine mit einer Verstelleinrichtung relativbewegliche Beschichtungsrolle mit einem vorbestimmten Sollwert einer Anstellkraft oder auf eine vorbestimmte Anstellposition an das bewegte Metallband oder eine weitere Beschichtungsrolle geregelt angestellt wird. Hierbei wird der zeitliche Verlauf des Istwertes der Anstellkraft, bzw. der zeitliche Verlauf des Istwertes der von der Beschichtungsrolle rückwirkenden Reaktionskraft kontinuierlich oder in Zeitabständen gemessen, dieser Istwertverlauf einer Recheneinheit zugeführt und ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt. Speziell durch die erfindungsgemäß ausgestaltete Verstelleinrichtung ist es möglich, sehr schnell und präzise auf Schwankungen der von der Beschichtungsrolle rückwirkenden Reaktionskräfte zu reagieren.To achieve the object, the invention further comprises a method for applying a coating agent having a predetermined layer thickness on a moving metal strip in a coil coating device, wherein a relatively movable with an adjustment coating roller with a predetermined target value of a contact force or to a predetermined Anstellposition to the moving metal belt or a another coating role is regulated regulated. Here, the temporal course of the actual value of the contact force, or the time course of the actual value of the reactive force from the coating roll reaction force continuously or measured at intervals, fed this process value of a processor and fed to the Istwertverlauf this reaction force gleichmäßendes correction signal an adjustment. Specifically, by the adjusting device designed according to the invention, it is possible to react very quickly and precisely to fluctuations in the reaction forces retroacting from the coating roller.

Wenn zum zeitlichen Verlauf des Istwertes der Reaktionskraft zusätzlich die Winkellage der Beschichtungsrolle messtechnisch erfasst wird, können in der Recheneinheit periodisch wiederkehrende Sollwertabweichungen der Reaktionskraft, insbesondere mit der Drehfrequenz der Beschichtungsrolle korrelierende, stetig wiederkehrende Sollwertabweichungen, ermittelt werden und in Abhängigkeit von diesen stetig wiederkehrenden Sollwertabweichungen entsprechend der Winkellage der Beschichtungsrolle ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt werden. Damit können periodische Schwankungen der Reaktionskraft, die beispielsweise durch Exzentrizität der Beschichtungsrolle auftreten, herausgefiltert werden und mit einer darauf abgestimmten korrigierten Anstellkraft gezielt entgegengewirkt werden. periodisch wiederkehrende Sollwertabweichungen der Reaktionskraft bereits vor Beginn des Aufbringens eines Beschichtungsmittels erfasst werden und zumindest mit Beginn des Aufbringens eines Beschichtungsmittels ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt wird. Ein Inkrementalgeber oder ein Frequenzumformer an den Antriebsmotoren der Beschichtungsrollen werden als Messeinrichtungen zur Erfassung der Winkellage der jeweiligen Beschichtungsrollen herangezogen.If, additionally, the angular position of the coating roller is detected metrologically with respect to the time profile of the actual value of the reaction force, periodically recurring nominal value deviations of the reaction force, in particular with the rotational frequency of the coating roller correlating, continuously recurring nominal value deviations, can be determined in the arithmetic unit and in response to these continuously recurring nominal value deviations the angular position of the coating roller to be supplied to the actual value curve of this reaction force gleichmäßendes correction signal an adjustment. This allows periodic fluctuations in the reaction force, which occur for example due to eccentricity of the coating roll, to be filtered out and counteracted in a targeted manner by means of a corrected setting force coordinated therewith. periodically recurring setpoint deviations of the reaction force are detected even before the beginning of the application of a coating agent, and at least at the beginning of the application of a coating agent, a correction signal which compares the actual value profile of this reaction force to an adjusting device is supplied. An incremental encoder or a frequency converter on the drive motors of the coating rollers are used as measuring devices for detecting the angular position of the respective coating rollers.

Eine vorteilhafte Ausgestaltung des Verfahrens besteht darin, dass periodisch wiederkehrende Sollwertabweichungen der Reaktionskraft bereits vor Beginn des Aufbringens eines Beschichtungsmittels erfasst werden und zumindest mit Beginn des Aufbringens eines Beschichtungsmittels ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt wird. Damit wird es möglich, den momentanen Istzustand der charakterisierenden Kenngrößen einer Beschichtungsanlage, wie beispielsweise Härteunterschiede in der Rollenbeschichtung, aber auch Unrundheiten der Beschichtungsrollen oder Spiele im System, bereits vor dem Beschichtungsvorgang zu ermitteln und über die Recheneinheit (Regler) als Startbedingungen vorzugeben. Diese Kenngrößen werden während des Beschichtungsvorganges in Zeitabständen wiederholt ermittelt und über entsprechende Korrektursignale an die Verstelleinrichtung übermittelt.An advantageous embodiment of the method is that periodically recurring setpoint deviations of the reaction force already before the beginning of Applying a coating agent are detected and at least at the beginning of the application of a coating agent a the actual value curve of this reaction force gleichmäßendes correction signal is supplied to an adjustment. This makes it possible to determine the current actual state of the characterizing characteristics of a coating system, such as hardness differences in the roller coating, but also roundness of the coating rolls or games in the system, before the coating process and specify the starting unit via the computing unit (controller). These parameters are determined repeatedly during the coating process at intervals and transmitted via appropriate correction signals to the adjustment.

Weitere Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung nicht einschränkender Ausführungsbeispiele, wobei auf die beiliegenden Figuren Bezug genommen wird, die folgendes zeigen:

  • Fig. 1 einen Querschnitt durch eine mögliche Ausführungsform einer Bandbeschichtungseinrichtung mit den erfindungsgemäßen Verstelleinrichtungen,
  • Fig. 2 eine Ansicht einer als kompakte Baueinheit ausgebildeten Verstelleinrichtung.
Further advantages and features of the present invention will become apparent from the following description of non-limiting embodiments, reference being made to the attached figures, which show:
  • 1 shows a cross section through a possible embodiment of a coil coating device with the adjusting devices according to the invention,
  • Fig. 2 is a view of a trained as a compact unit adjustment.

Eine mögliche Ausführungsform einer erfindungsgemäßen Bandbeschichtungseinrichtung zum beidseitigen Beschichten eines Metallbandes mit einem Farblack ist in Fig. 1 in einer Schnittdarstellung schematisch veranschaulicht. In einem fest auf einem Fundament verankerten zentralen Maschinenrahmen 1 ist eine Umlenkrolle 2 drehbar gelagert. Das zu beschichtende Metallband 3 wird ausgehend von einer Abwickelstation 4 unter Bandzug um die Umlenkrolle 2 zu einer Aufwickelstation 5 geführt und hierbei in aufeinanderfolgenden Schritten der Lackauftrag auf der Oberseite und der Unterseite des Metallbandes durchgeführt.A possible embodiment of a strip coating device according to the invention for coating both sides of a metal strip with a colored lacquer is illustrated schematically in FIG. 1 in a sectional view. In a firmly anchored on a foundation central machine frame 1, a guide roller 2 is rotatably mounted. Starting from a unwinding station 4, the metal strip 3 to be coated is guided under strip tension around the deflection roller 2 to a winding station 5 and, in successive steps, the paint application is carried out on the upper side and the lower side of the metal strip.

Um einen Lackauftrag in vorbestimmter gleichmäßiger Schichtdicke auf der Bandoberseite sicherzustellen, ist folgender Anlagenaufbau vorgesehen. Auf einem Oberseitenrahmen 6 ist ein Tragschlitten 7 auf schräg verlaufenden Längsführungen 8 in Pfeilrichtung verschiebbar abgestützt. Die Verschiebebewegung erfolgt mittels einer Verstelleinrichtung 9, die mit einem Drehgelenk 10 mit dem Tragschlitten 7 gekoppelt ist und die in einer Konsole 11 am Oberseitenrahmen 6 ortsfest festgelegt ist. Auf dem Tragschlitten 7 ist eine als Auftragrolle 12 ausgebildete Beschichtungsrolle 13 in Stützlagern 14 drehbar abgestützt, wobei jedes der an den Enden der Auftragrolle angeordneten Stützlager 14 auf je einer Traglasche 15 des Tragschlittens 7 befestigt ist und jeder Traglasche 15 eine Verstelleinrichtung 9 zugeordnet ist. Damit kann die Auftragrolle 12 unter Berücksichtigung der Banddicke des zu beschichtenden Metallbandes an dieses bzw. an die Umlenkrolle 2 weggeregelt angestellt werden. Auf dem Tragschlitten 7 ist ein weiterer Tragschlitten 16 auf Längsführungen 17 verschiebbar abgestützt, wobei die Verschiebebewegung mit einer Verstelleinrichtung 18 erfolgt, die mit einem Drehgelenk 19 mit dem Tragschlitten 16 gekoppelt ist und die in einer Konsole 20 am Tragschlitten 7 ortsfest zu diesem festgelegt ist. Der Tragschlitten 16 trägt eine in Stützlagern 21 drehbar abgestützte Beschichtungsrolle 22, die als Tauchrolle 23 ausgebildet ist und in einen Beschichtungsmittelbehälter 24 eintaucht, in dem sich beispielsweise Farblack befindet. Der grundsätzlich Aufbau des Tragschlitten 16 entspricht dem des Tragschlitten 7. Mt der Verstelleinrichtung 18 kann die Tauchrolle 23 kraftgeregelt an die Auftragrolle 12 angestellt werden. Auf dem Tragschlitten 16 ist ein weiterer Tragschlitten 25 auf Längsführungen 26 längsverschiebbar abgestützt, wobei die Verschiebebewegung mit einer Verstelleinrichtung 27 erfolgt, die mit einem Drehgelenk 28 mit dem Tragschlitten 25 gekoppelt ist und die mit einer Konsole 29 am Tragschlitten 16 ortsfest zu diesem festgelegt ist. Der Tragschlitten 25 trägt eine in Stützlagern 21 drehbar abgestützte Beschichtungsrolle 30, die als Dossierrolle 31 ausgebildet ist. Der grundsätzliche Aufbau des Tragschlittens 25 entspricht dem des Tragschlittens 16 oder 7. Mit der Verstelleinrichtung 27 wird die Dossierrolle 31 an die Tauchrolle 23 kraftgeregelt angepresst und die von der Tauchrolle aufgenommene überschüssige Lackmenge wieder abgestreift.In order to ensure a paint application in a predetermined uniform layer thickness on the tape top, the following system structure is provided. On a top frame 6, a support carriage 7 is slidably supported on obliquely extending longitudinal guides 8 in the arrow direction. The sliding movement takes place by means of an adjusting device 9, which is coupled to a pivot 10 with the support carriage 7 and which is fixed in a bracket 11 on the upper side frame 6 stationary. On the support carriage 7 designed as an application roller 12 coating roller 13 is rotatable in support bearings 14 supported, wherein each of the arranged at the ends of the application roller support bearing 14 is mounted on a respective support bracket 15 of the support carriage 7 and each support bracket 15 is associated with an adjustment 9. Thus, the applicator roll 12 can be adjusted in a controlled manner, taking into account the strip thickness of the metal strip to be coated on this or to the deflection roller 2. On the support carriage 7, a further supporting carriage 16 is slidably supported on longitudinal guides 17, wherein the sliding movement takes place with an adjusting device 18 which is coupled to a pivot 19 with the support carriage 16 and which is fixed in a bracket 20 on the support carriage 7 fixed thereto. The support carriage 16 carries a rotatably supported in support bearings 21 coating roller 22, which is designed as a dipping roller 23 and immersed in a coating agent container 24, in which, for example, color varnish is. The basic structure of the support carriage 16 corresponds to that of the support carriage 7. Mt of the adjustment device 18, the dipping roller 23 can be adjusted in a force-controlled manner to the application roller 12. On the support carriage 16, a further support carriage 25 is longitudinally displaceably supported on longitudinal guides 26, wherein the sliding movement takes place with an adjusting device 27 which is coupled to a pivot 28 with the support carriage 25 and which is fixed to a bracket 29 on the support carriage 16 fixed thereto. The support carriage 25 carries a rotatably supported in support bearings 21 coating roll 30, which is designed as a dossier 31. The basic structure of the support carriage 25 corresponds to that of the support carriage 16 or 7. With the adjusting device 27, the dossier roller 31 is force-controlled pressed against the dipping roller 23 and stripped of the dipping roller excess amount of paint again.

Um einen Lackauftrag in vorbestimmter gleichmäßiger Schichtdicke auf der Bandunterseite sicherzustellen, ist folgender Anlagenaufbau vorgesehen. Auf einem Unterseitenrahmen 34 ist eine Beschichtungsrolle 35 in Stützlagern 36 drehbar abgestützt, wobei die Stützlager 36 auf dem Unterseitenrahmen 34 fest verankert sind. Die Beschichtungsrolle 35 ist hierbei in einer Position festgelegt, bei der das zu beschichtende Metallband mit einer Anpresskraft in Abhängigkeit vom Bandzug an die Beschichtungsrolle angedrückt wird. Auf dem Unterseitenrahmen 34 ist ein Tragschlitten 37 auf schräg verlaufenden Längsführungen 38 in Pfeilrichtung verschiebbar abgestützt. Die Verschiebebewegung erfolgt mit einer Verstelleinrichtung 39, die mit einem Drehgelenk 40 mit dem Tragschlitten 37 gekoppelt ist und die in einer Konsole 41 am Unterseitenrahmen 34 ortsfest festgelegt ist. Der Tragschlitten 37 trägt eine in Stützlagern 42 drehbar abgestützte Beschichtungsrolle 43, die als Tauchrolle 44 ausgebildet ist und in einen Beschichtungsmittelbehälter 45 eintaucht, in dem sich beispielsweise Farblack befindet. Der grundsätzlich Aufbau des Tragschlitten 37 entspricht beispielsweise dem des Tragschlitten 7. Mit der Verstelleinrichtung 39 kann die Tauchrolle 23 kraftgeregelt an die Beschichtungsrolle 35 angestellt werden.In order to ensure a paint application in a predetermined uniform layer thickness on the underside of the belt, the following system structure is provided. On a lower side frame 34, a coating roller 35 is rotatably supported in support bearings 36, wherein the support bearings 36 are firmly anchored on the lower side frame 34. The coating roller 35 is in this case set in a position in which the metal strip to be coated is pressed against the coating roll with a contact force as a function of the strip tension. On the lower side frame 34, a support carriage 37 is slidably supported on obliquely extending longitudinal guides 38 in the arrow direction. The sliding movement takes place with an adjusting device 39, which is coupled to a pivot 40 with the support carriage 37 and which is fixed in a bracket 41 on the lower frame 34 fixed. The support carriage 37 carries a support roller 42 rotatably supported coating roller 43, which is formed as a dipping roller 44 and immersed in a coating agent container 45, in which, for example, color varnish is. The basic structure of the support carriage 37 corresponds for example to that of the support carriage 7. With the adjustment device 39, the dipping roller 23 can be adjusted in a force-controlled manner to the coating roller 35.

Am zentralen Maschinenrahmen 1 ist eine Hubrolle 48 in einer von einem Druckmittelzylinder 49 betätigbaren Schwenkkonsole 50 drehbar und anhebbar abgestützt. Bei Durchlauf einer Bandschweißnaht durch die Beschichtungsanlage wird das Metallband so weit angehoben, dass die Bandschweißnaht die Auftragrolle 35 kontaktfrei passieren kann. Gleichermaßen wird der Tragschlitten 7 bei Durchlauf einer Bandschweißnaht kurzzeitig zurückgezogen und wieder angestellt. Damit werden Beschädigungen der empfindlichen Oberfläche der Auftragrollen vermieden.At the central machine frame 1, a lifting roller 48 is rotatably and liftably supported in one of a pressure medium cylinder 49 actuated pivot bracket 50. When passing a band weld through the coating system, the metal strip is raised so far that the band weld the applicator roll 35 can pass without contact. Similarly, the support carriage 7 is briefly withdrawn in the course of a band weld and employed again. This avoids damage to the sensitive surface of the application rollers.

Alle Verstelleinrichtungen 9, 18, 27, 39 sind als kompakte Baueinheit 52 ausgebildet, wie sie im Detail in Fig. 2 dargestellt ist. Diese in sich geschlossene Verstelleinrichtung umfasst eine Antriebseinrichtung 53 und in diese baulich unmittelbar integrierte Messeinrichtungen 54. Kerneinheit dieser Antriebseinrichtung 53 ist ein hydraulischen Anstellzylinder 55, der im Wesentlichen eine Zylinder-Kolben-Einheit umfasst. Direkt an diesen Anstellzylinder 55 ist eine Ventilplatte 56 angebaut, die einem herkömmlichen Steuerblock in einem hydraulischen Versorgungssystem entspricht, ohne jedoch längere hydraulische Steuerleitungen zwischen dem Anstellzylinder und der Ventilplatte zu benötigen. Direkt auf der Ventilplatte 56 sind ein oder mehrere eine Druckmittelsteuereinheit 57 bildende Servoventile angeordnet, mit denen die Bewegung des nicht dargestellten Hubkolbens im Anstellzylinder 55 gesteuert wird. Lediglich Überleitkanäle für das Hydrauliköl sind zwischen dem Anstellzylinder, der Ventilplatte und den Servoventilen der Druckmittelsteuereinheit vorgesehen und reduzieren damit die Länge der hydraulischen Steuerleitungen auf ein Minimum. Die zuvor unter Bezug auf Fig. 1 beschriebenen Tragschlitten 6, 16, 25, 37 sind mit den als kompakte Baueinheit 52 ausgebildeten Verstelleinrichtungen 9, 18, 27, 39 durch Verbindungselemente 10, 19, 28, 40 verbunden, die als Gelenke ausgestaltet sind und von denen ein Verbindungselement 10 in Fig. 2 dargestellt ist. Dieses als Drehgelenk ausgestaltete Verbindungselement kann entweder eine Schwenkbewegung in einer Ebene oder eine Schwenkbewegung in zwei Ebenen oder räumlich zulassen. Direkt am Gelenk oder an der Kolbenstange 58 in diesem Bereich ist eine Kraftmesseinrichtung 59 positioniert, mit der die Anstellkraft der jeweiligen Beschichtungsrolle gemessen werden kann. Als Kraftmesseinrichtung ist eine Druckmessdose eingesetzt. Am Anstellzylinder 55 ist weiters eine auf die Kolbenposition geeichte Wegmesseinrichtung 60 angebaut. Die Kraftmesseinrichtung besteht in einer Druckmesszelle. Das Servoventil 57, die Kraftmesseinrichtung 59 und die Wegmesseinrichtung 60 sind über Datenleitungen mit einer zentralen Reicheneinheit 61 verbunden, von der aus die Bewegungsabläufe an der Beschichtungseinrichtung koordiniert und geregelt werden. Primär basierend auf Produktionskenngrößen, wie der Banddicke oder der Position von Bandschweißnähten aus der Produktionsverfolgung werden unter Einbindung der Messwerte der Wegmesseinrichtungen die Einstellung der Betriebsposition der einzelnen Beschichtungsrollen weggeregelt vorgenommen. Während des laufenden Beschichtungsvorganges wird die Beschichtungsdicke kraftgeregelt weitgehend konstant gehalten, wobei kontinuierlich insbesondere die Anstellkraft zwischen Auftragrollen und Tauchrolle gemessen wird und diese Messwerte unter Berücksichtigung von sonstigen Kennwerten des Beschichtungsmittels oder Messwerten einer zusätzlichen Schichtdickenmessung zur Regelung herangezogen werden. Entsprechende Steuersignale werden von der Recheneinheit an das Servoventil gegeben.All adjustment 9, 18, 27, 39 are formed as a compact unit 52, as shown in detail in Fig. 2. This self-contained adjusting device comprises a drive device 53 and in this structurally directly integrated measuring devices 54. Core unit of this drive device 53 is a hydraulic adjusting cylinder 55, which essentially comprises a cylinder-piston unit. Directly at this Anstellzylinder 55 a valve plate 56 is attached, which corresponds to a conventional control block in a hydraulic supply system, but without the need for longer hydraulic control lines between the Anstellzylinder and the valve plate. Directly on the valve plate 56, one or more a pressure medium control unit 57 forming servo valves are arranged, with which the movement of the reciprocating piston, not shown in the adjusting cylinder 55 is controlled. Only transfer channels for the hydraulic oil are provided between the adjusting cylinder, the valve plate and the servo valves of the pressure medium control unit and thus reduce the length of the hydraulic control lines to a minimum. The support carriages 6, 16, 25, 37 described above with reference to FIG. 1 are connected to the adjustment devices 9, 18, 27, 39 formed as a compact structural unit 52 by connecting elements 10, 19, 28, 40, which are configured as joints and of which a connecting element 10 is shown in Fig. 2. This configured as a hinge connecting element can either a pivoting movement in a plane or a pivoting movement in two planes or spatially. Directly on the joint or on the piston rod 58 in this area, a force measuring device 59 is positioned, with which the contact force of the respective coating roller can be measured. As a force measuring device, a pressure cell is used. On Anstellzylinder 55 a calibrated to the piston position displacement measuring device 60 is further grown. The force measuring device consists in a pressure measuring cell. The servo valve 57, the force measuring device 59 and the path measuring device 60 are connected via data lines with a central rich unit 61, from which the movements are coordinated and regulated at the coating device. Primarily based on production characteristics, such as the strip thickness or the position of strip welds from the production tracking, the adjustment of the operating position of the individual coating rolls is carried out in a regulated manner, incorporating the measured values of the displacement measuring devices. During the current coating process, the coating thickness is kept largely constant by force control, wherein in particular the contact force between applicator rolls and dipping roll is measured continuously and these measured values are taken into account taking into account other characteristic values of the coating composition or measured values of an additional layer thickness measurement. Corresponding control signals are given by the arithmetic unit to the servo valve.

Die insbesondere durch die Einsparung längerer hydraulischer Steuerleitungen erhöhte Regelgenauigkeit ermöglicht in Verbindung mit genauen Kraftmessungen eine schnellere Reaktion auf kurzzeitige von den Beschichtungsrollen verursachte Kraftschwankungen. Insbesondere mit der Rotation der Beschichtungsrollen auftretende zyklische Kraftschwankungen, die durch Rollenexzentrizität, Härteunterschiede in der Rollenbeschichtung, und ähnlichem hervorgerufen werden, führen zu Abweichungen in der Soll-Schichtdicke der Beschichtung, somit zu zyklisch wiederkehrenden Schichtdickenschwankungen. Mit der vorgeschlagenen Ausgestaltung der Verstelleinrichtungen können Kraftschwankungen ausgeregelt werden.The increased control accuracy, in particular by saving longer hydraulic control lines, in conjunction with accurate force measurements, allows a faster response to short-term force variations caused by the coating rolls. Especially with the rotation of the coating rollers occurring cyclic force fluctuations, which are caused by roller eccentricity, hardness differences in the roller coating, and the like, lead to deviations in the desired layer thickness of the coating, thus cyclically recurring layer thickness variations. With the proposed embodiment of the adjustment force fluctuations can be compensated.

Die Erfindung ist nicht auf eine Beschichtungseinrichtung der oben beschriebenen Art beschränkt. Insbesondere kann das zu beschichtende Metallband in beliebiger Weise durch die Beschichtungseinrichtung geführt werden und auch die Beschichtungsrollen können in ihrer Anzahl, Ausbildung der Manteloberfläche, Art der Anstellung zum Metallband und in ihrem Zusammenwirken beliebig ausgebildet sein.The invention is not limited to a coating device of the type described above. In particular, the metal strip to be coated can be guided in any manner through the coating device and also the coating rollers can be formed arbitrarily in their number, formation of the mantle surface, type of employment to the metal strip and in their interaction.

Claims (10)

Bandbeschichtungseinrichtung zum Aufbringen eines Beschichtungsmittels auf ein bewegtes Metallband in einer vorbestimmten Schichtdicke mit einer auf einem Tragschlitten (6, 16, 25, 37) abgestützten Beschichtungsrolle (13, 22, 30, 43) und eine dem Tragschlitten zugeordnete Verstelleinrichtung (9, 18, 27, 39), mit der die Beschichtungsrolle mit einer bestimmten Anstellkraft oder auf eine bestimmte Anstellposition gegen das bewegte Metallband (3) oder eine weitere Beschichtungsrolle (13, 22, 30, 43) geregelt angestellt ist, dadurch gekennzeichnet, dass die Verstelleinrichtung (9, 18, 27, 39) als kompakte Baueinheit (52) ausgebildet ist und diese kompakte Baueinheit die Anstellkraft bewirkende Antriebseinrichtungen (53) und die Anstellkraft überwachende Messeinrichtungen (54) umfasst, wobei alle hydraulischen Steuerleitungen an der Antriebseinrichtung innerhalb der kompakten Baueinheit angeordnet sind.A strip coating device for applying a coating agent to a moving metal strip in a predetermined layer thickness with a coating roll (13, 22, 30, 43) supported on a support carriage (6, 16, 25, 37) and an adjustment device (9, 18, 27) associated with the support carriage , 39), with which the coating roller with a certain contact force or to a certain pitch against the moving metal belt (3) or another coating roller (13, 22, 30, 43) is employed regulated, characterized in that the adjusting device (9, 18, 27, 39) as a compact unit (52) is formed and this compact unit comprises the Anstellkraft effecting drive means (53) and the Anstellkraft monitoring measuring devices (54), wherein all the hydraulic control lines are arranged on the drive means within the compact unit. Bandbeschichtungsanlage nach Anspruch 1, dadurch gekennzeichnet, dass die Antriebseinrichtung (53) mindestens einen von einer Zylinder-Kolben-Einheit gebildeten hydraulischen Anstellzylinder (55), eine Ventilplatte (56) und eine Druckmittelsteuereinheit (57), vorzugsweise mindestens ein Servoventil, umfasst und dass die Messeinrichtungen (54) eine Kraft- oder Druckmesseinrichtung (59) und/oder eine Wegmesseinrichtung (60) umfassen.Strip coater according to claim 1, characterized in that the drive device (53) comprises at least one of a cylinder-piston unit formed hydraulic adjusting cylinder (55), a valve plate (56) and a pressure medium control unit (57), preferably at least one servo valve, and that the measuring devices (54) comprise a force or pressure measuring device (59) and / or a displacement measuring device (60). Bandbeschichtungseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der hydraulische Anstellzylinder (55) eine Kolbenstange (58) umfasst, die mit dem Tragschlitten (6, 16, 25, 37) der jeweiligen Beschichtungsrolle über ein Verbindungselement (10, 19, 28, 40), vorzugsweise über ein Gelenk, verbunden ist und die von einer Kraftmesseinrichtung gebildete Kraft- oder Druckmesseinrichtung (59) zur Erfassung der Reaktionskraft der jeweiligen Beschichtungsrolle in diesem Verbindungselement, vorzugsweise in diesem Gelenk an der Kolbenstange, angeordnet ist.Strip coating device according to claim 1 or 2, characterized in that the hydraulic setting cylinder (55) comprises a piston rod (58) connected to the support carriage (6, 16, 25, 37) of the respective coating roll via a connecting element (10, 19, 28, 40), preferably via a joint, and the force or pressure measuring device (59) formed by a force measuring device is arranged to detect the reaction force of the respective coating roll in this connecting element, preferably in this joint on the piston rod. Bandbeschichtungseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kraft- oder Druckmesseinrichtung (59) zum Erfassen der Reaktionskraft der jeweiligen Beschichtungsrolle von einer Druckmesseinrichtung gebildet ist und dass diese Druckmesseinrichtung im Druckmittel angeordnet ist.Strip coating device according to claim 1 or 2, characterized in that the force or pressure measuring device (59) for detecting the reaction force of the respective coating roll is formed by a pressure measuring device and that this pressure measuring device is arranged in the pressure medium. Bandbeschichtungseinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wegmesseinrichtung (60) in den hydraulischen Anstellzylinder (55) integriert ist.Strip coating device according to one of the preceding claims, characterized in that the displacement measuring device (60) in the hydraulic adjusting cylinder (55) is integrated. Bandbeschichtungseinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass alle Verstelleinrichtungen für Beschichtungsrollen tragende Tragschlitten über Datenleitungen mit einer Recheneinheit (61) verbunden sind.Strip coating device according to one of the preceding claims, characterized in that all carrying devices for coating rollers carrying carrying carriages are connected via data lines with a computing unit (61). Verwendung einer Verstelleinrichtung in einer Bandbeschichtungseinrichtung nach einem der Ansprüche 1 bis 6 zum Ausregeln von durch Kraftschwankungen oder Druckschwankungen an einer Beschichtungsrolle entstehende Schichtdickenabweichungen.Use of an adjusting device in a belt coating device according to one of claims 1 to 6 for compensating for thickness variations or pressure fluctuations on a coating roll resulting layer thickness deviations. Verfahren zum Aufbringen eines Beschichtungsmittels mit vorbestimmter Schichtdicke auf ein bewegtes Metallband in einer Bandbeschichtungseinrichtung, wobei eine mit einer Verstelleinrichtung relativbewegliche Beschichtungsrolle mit einem vorbestimmten Sollwert einer Anstellkraft oder auf eine vorbestimmte Anstellposition an das bewegte Metallband oder eine weitere Beschichtungsrolle geregelt angestellt wird, dadurch gekennzeichnet, dass der zeitliche Verlauf des Istwertes der Anstellkraft, bzw. der zeitliche Verlauf des Istwertes der von der Beschichtungsrolle rückwirkenden Reaktionskraft kontinuierlich oder in Zeitabständen gemessen wird, dieser Istwertverlauf einer Recheneinheit zugeführt wird und ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt wird.A method for applying a coating agent having a predetermined layer thickness to a moving metal strip in a coil coating device, wherein a relatively movable with an adjustment coating roller with a predetermined target value of a contact force or to a predetermined Anstellposition to the moving metal strip or another coating roller is employed regulated, characterized in that the temporal course of the actual value of the adjusting force, or the time profile of the actual value of the reaction force retroactively from the coating roller is measured continuously or at intervals, this actual value course is fed to a computing unit and a correction signal which compensates the actual value profile of this reaction force is supplied to an adjusting device. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass zum zeitlichen Verlauf des Istwertes der Reaktionskraft zusätzlich die Winkellage der Beschichtungsrolle messtechnisch erfasst wird, dass in der Recheneinheit periodisch wiederkehrende Sollwertabweichungen der Reaktionskraft, insbesondere mit der Drehfrequenz der Beschichtungsrolle korrelierende, stetig wiederkehrende Sollwertabweichungen, ermittelt werden und in Abhängigkeit von diesen stetig wiederkehrenden Sollwertabweichungen entsprechend der Winkellage der Beschichtungsrolle ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt wird.A method according to claim 8, characterized in that the temporal course of the actual value of the reaction force in addition the angular position of the coating roller is metrologically detected that in the arithmetic unit periodically recurring setpoint deviations of the reaction force, in particular with the rotational frequency of Coating role correlating, continuously recurring setpoint deviations are determined and in response to these constantly recurring setpoint deviations according to the angular position of the coating roll a the actual value of this reaction force gleichmäßendes correction signal is fed to an adjustment. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass periodisch wiederkehrende Sollwertabweichungen der Reaktionskraft bereits vor Beginn des Aufbringens eines Beschichtungsmittels erfasst werden und zumindest mit Beginn des Aufbringens eines Beschichtungsmittels ein den Istwertverlauf dieser Reaktionskraft vergleichmäßigendes Korrektursignal einer Verstelleinrichtung zugeführt wird.A method according to claim 8 or 9, characterized in that periodically recurring setpoint deviations of the reaction force are detected before the start of applying a coating agent and at least at the beginning of the application of a coating agent is supplied to the actual value of this reaction force gleichmäßendes correction signal an adjustment.
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US5413806A (en) 1993-02-01 1995-05-09 Hunter Engineering Company, Inc. Strip coating machine with thickness control
US5743964A (en) 1995-01-24 1998-04-28 Fata Hunter, Inc. Roll coating system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007107819A2 (en) * 2006-03-23 2007-09-27 Tenova S.P.A. Machine for the continuous application of protection products on a metallic strip
WO2007107819A3 (en) * 2006-03-23 2008-12-04 Tenova Spa Machine for the continuous application of protection products on a metallic strip
CN108716882A (en) * 2018-05-10 2018-10-30 南安市创培电子科技有限公司 A kind of maintenance conditions equipment of coating machine

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RU2005120488A (en) 2007-01-10
EP1611961B1 (en) 2013-02-27
AT500487A4 (en) 2006-01-15
ES2412958T3 (en) 2013-07-12
CN101502824A (en) 2009-08-12
CN100471581C (en) 2009-03-25
RU2380170C2 (en) 2010-01-27
CN1714942A (en) 2006-01-04
AT500487B1 (en) 2006-01-15
PL1611961T3 (en) 2013-08-30

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