EP1493867B1 - Agencement destiné à comprimer deux cylindres d'axes parallèles pouvant être rapprochés l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de matériau - Google Patents

Agencement destiné à comprimer deux cylindres d'axes parallèles pouvant être rapprochés l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de matériau Download PDF

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Publication number
EP1493867B1
EP1493867B1 EP04019300A EP04019300A EP1493867B1 EP 1493867 B1 EP1493867 B1 EP 1493867B1 EP 04019300 A EP04019300 A EP 04019300A EP 04019300 A EP04019300 A EP 04019300A EP 1493867 B1 EP1493867 B1 EP 1493867B1
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EP
European Patent Office
Prior art keywords
force
sensor
rolls
arrangement according
rollers
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.)
Expired - Lifetime
Application number
EP04019300A
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German (de)
English (en)
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EP1493867A3 (fr
EP1493867A2 (fr
Inventor
Manfred Ueberschaer
Christoph Henninger
Eckard Wozny
Horst Kaipf
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Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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.)
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Publication date
Priority claimed from DE2001125379 external-priority patent/DE10125379A1/de
Priority claimed from DE2001125378 external-priority patent/DE10125378A1/de
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1493867A2 publication Critical patent/EP1493867A2/fr
Publication of EP1493867A3 publication Critical patent/EP1493867A3/fr
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Publication of EP1493867B1 publication Critical patent/EP1493867B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/004—Regulating the pressure
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/06—Means for regulating the pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work

Definitions

  • the invention relates to the mutual pressing of a pair of two axially parallel rolls in a device for producing or / and treating a moving material web and relates to an arrangement according to the preamble of claim 1.
  • Roller pairings are frequently used in machines on which paper, board or other material webs are produced or treated.
  • material webs are, for example, calendered, coated or printed.
  • Regular attention is paid to the pressure applied between the rollers of the pairing.
  • the adherence to a certain pressing force is usually of decisive importance for the result of the treatment of the material web, be it, for example, the calendering result in calendering or the weft result when applying a glue or a pigmented coating color.
  • the US 2,691,326 discloses an assembly having the features of the preamble of claim 1, comprising two axially parallel arranged, approachable rollers, a force generating means for providing a pressing force between the rollers and a sensor means for detecting the pressing force.
  • the sensor means is disposed in a lever bar between the force generating means and a roller bearing.
  • FIGS US 5,611,500 For further illustration of the state of the art for axially engageable rollers, which can be approached by a force generating means, as well as sensor means for detecting the pressing force, it is also possible to refer to FIGS US 5,611,500 , the US 2,729,003 as well as the US 4,191,341 to get expelled.
  • Object of the present invention is to provide an arrangement with two axially parallel arranged, approachable rollers in a coating, which has higher stability and allows a simple and accurate adjustment of the pressing force between the rollers.
  • the invention provides an arrangement according to claim 1.
  • the sensor means are arranged in the force transmission path extending from the force generating means via the rollers outside of roller bodies of the two rollers.
  • a roll body of a roll essentially means the barrel-shaped (usually hollow-cylindrical) barrel-shaped structure usually coated with a covering of elastic or hard material, which forms the actual roll.
  • Bearing journals that serve to rotatably support the roller, are not counted to the roller body.
  • the force provided by the force generating means branches onto the force transmission path extending over the rollers and at least one further force transmission path.
  • the sensor means are arranged in the force transmission path extending over the rollers after the latter has been branched off from the further power transmission path and before being reunited with another power transmission path.
  • an advantageous possibility for influencing the effective pressing force between the rollers is that the ratio of the forces transmitted via the various power transmission paths is variable.
  • stop means are arranged in the further force transmission path, which are adjustable to change the ratio of the forces transmitted via the various power transmission paths.
  • the sensor means may comprise at least one sensor arranged in front of the roller body of the first roller and at least one sensor arranged after the roller body of the second following roller.
  • the measured values supplied by the various sensors can be compared with one another, so that the sensors, so to speak, control each other. The safety and accuracy of the force measurement can be increased.
  • one of the two rollers is mounted on a stand relative to this stationary, but rotatably mounted on the stand, a roller rotatably supporting the other roller bearing lever which is pivotable relative to the stand for mutual approach of the two rollers ,
  • the force generating means engage the bearing lever in this embodiment.
  • the sensor means may then comprise at least one sensor which is mounted on the bearing lever or the stand.
  • the bearing lever or stator When designing the bearing lever or stator and the positioning of the sensor, it must be ensured that the sensor detects exactly that component of force which is introduced into the roller pairing.
  • the sensor means may comprise at least one sensor, which is arranged in a storage area of one of the rollers.
  • the sensor may be mounted on a journal of the respective roller. But it can also be provided with a bearing a journal of the respective roller enclosing bearings with the sensor. In the latter case, the sensor may be integrated in the rolling bearing or mounted on an outer ring of the rolling bearing. It is also conceivable that the sensor is mounted on a bearing housing, in which a bearing journal of the respective roller enclosing rolling bearing is added.
  • the sensor means may alternatively or in addition to the above-mentioned possible sensor locations include at least one sensor which is housed in a separately manufactured sensor module, said sensor module between the stator or the bearing lever and a bearing assembly for a bearing pin on the stand or the Bearing lever held roller is installed.
  • sensor modules are commercially available in the form of mechanically self-contained load cells. For storage of the rollers can then be used on standard, standardized bearing kits, which has a cost-reducing effect.
  • the sensor means may comprise at least one tensile and / or pressure-sensitive element, in particular a strain gauge, for force sensing.
  • tensile and / or pressure-sensitive element in particular a strain gauge
  • Such sensor elements are known in a variety of configurations and have proven to be robust, reliable and precise in practical use. Of course, sensor elements based on other measuring principles can also be used, as long as they are able to provide a sensor signal representative of the pressure force between the rollers.
  • an electronic control unit that responds to the sensor means and controls the force generating means is provided, which is set up for the controlled maintenance of a predetermined desired value of the pressure force between the rollers.
  • the force generating means in the region of both axial ends of the roller pairing may each comprise at least one independently controllable, in particular hydraulic force device and the sensor means for independent detection of the pressing force in both axial end portions of the roller pairing.
  • the control unit can then be set up to control the force devices in such a way that over the axial extent of the roller pairing a substantially constant line pressure between the rollers results, as is desired in numerous applications. Nevertheless, it is not impossible to program the control unit in such a way that different values of the line pressure result in the two axial end areas of the roller pairing.
  • the device according to the invention is preferably intended for use in a coating unit, in which the material web is passed between the two rollers and at least one of the rollers serves to transfer the application medium to the material web.
  • the distance-force characteristic provides different values of the center distance for different values of the pressing force, then it is understood that the term center distance is only representative of any size, that for the mutual center distance of the two Rolls is representative.
  • the distance-force characteristic instead of directly the distance between the axles can provide a position indication for an adjustable component influencing the center distance of the rollers.
  • the distance-force characteristic In principle, it is not excluded to derive the distance-force characteristic theoretically and to represent it in a formula. In general, however, it will be easier to perform measurements in a calibration phase of the device to determine the distance-force characteristic. These measurements can be carried out in particular with rotating rolls, since it has been shown that the flexing operations occurring during rotation in the elastic roll cover can influence the spring characteristic of the roll pairing. Therefore, it is recommended to determine the distance-force characteristic under conditions that are at least close to the conditions in the working mode of the machine.
  • the distance-force characteristic at least two pairs of values of center distance and pressure force for different values of the pressing force will be determined. It is advantageous if a zero point and an end point of the spring characteristic of the roller pairing are obtained by measurement. For zero point determination, one of the pairs of values for an approaching position of the rolls can be determined, in which the rolls are substantially brought together until mutual contact is established, but substantially no pressing force is transmitted between the rolls. The end point determination can take place in that one of the pairs of values for a pressure force transmitted between the rollers is determined, which corresponds at least approximately to a maximum pressing force for which the device is designed.
  • the center distance of the rollers in the region of both axial ends of the roller pairing will be independently adjustable. Although this opens up the possibility of adjusting a line pressure linearly changing in the axial direction between the rollers, it will be desirable for most applications to adjust the center distances in the two axial end regions of the roller pair such that a substantially over the axial extent of the roller pairing constant line pressure between the rollers results.
  • the arrangement may comprise sensor means for detecting the actual center distance of the rollers, wherein the control unit is responsive to the sensor means and adapted for the controlled maintenance of the desired value of the axial spacing.
  • the center distance of the rollers may be independently adjustable in the region of both axial ends of the roller pairing.
  • the control unit is then preferably designed for setting the center distances in the two axial end regions of the pair of rolls so that a substantially constant line pressure between the rollers results over the axial extension of the pair of rollers.
  • One of the first rollers may be held on a roller carrier displaceable relative to the second roller along the approach path.
  • the adjusting means may then comprise force-generating means engaging the roller carrier for introducing a force generating the pressing force into the roller carrier.
  • the force provided by the force generating means may substantially fully serve to generate the pressing force.
  • the force provided by the force generating means is branched, namely to a first, the pressing force between the two rollers transmitting force transmission path and at least one second power transmission path.
  • part of the force provided by the force generating means is transmitted on the first power transmission path via the roller pairing and another part of this force is transmitted on the at least one second power transmission path.
  • the ratio between the force transmitted on the first power transmission and the force on the at least one second power transmission transmitted force is variable.
  • the position of the stop means then serves as a size which is representative of the mutual center distance of the rollers. It only needs to be determined which position of the sling means which value of the center distance the rolls corresponds. If this relationship is known, only the stop means must be brought into the appropriate position to achieve a desired pressing force between the rollers.
  • the stop means may comprise at least one stop arranged for common movement with the first roller along its approach path to the second roller, and at least one counter stop stationary with respect to the axis of the second roller. In order to influence the force relationships between the different power transmission paths then at least one of the components: stop and counter stop can be adjusted.
  • the arrangement according to the invention is preferably intended for use in a machine for coating a paper or board web.
  • the paper or board web is preferably passed between the rollers, wherein at least one of the rollers for transferring a liquid to pasty application medium is used on the paper or board web.
  • FIG. 1 brushing shown used for two-sided indirect application of a liquid to pasty application medium, such as a pigmented coating color or surface glue on a running Material web 10 made of paper or cardboard.
  • the material web 10 moves through an application nip 12 referred to in the jargon as nip, which is formed between two adjacently arranged rollers 14, 16.
  • the rollers 14, 16 are arranged with their axes 18, 20 parallel to each other.
  • One of the rollers - here the roller 16 - serves as a so-called fixed roller, while the other roller - here the roller 14 - forms a so-called moving roller.
  • roller 16 is rotatable about its axis 20, but otherwise positionally fixed, while the moving roller 14 is approachable to the fixed roller 16 and removable from this.
  • the fixed roller 16 is held for this purpose on a firmly anchored to the ground machine stand 22.
  • a pivoting mounted on the machine stand 22 bearing lever 24 carries the moving roller 14.
  • To pivot the bearing lever 24 and thus to approach and pressing the moving roller 14 to the fixed roller 16 is a power device assembly 26 which preferably at least one hydraulic piston-cylinder Aggregate 28 in the region of both axial ends of the roller pairing 14, 16 has.
  • the power device assembly 26 is controllable by an electronic control unit 30 of the coating unit, wherein suitably an independent controllability of the individual force devices of the power device assembly 26 will be given.
  • Each of the rollers 14, 16 has in the illustrated embodiment, an elastic roll cover 128 and 130, which consists for example of a rubber or plastic material. In the context of the invention, it is of course sufficient if only one of the rollers 14, 16 has an elastic cover. The other of the rollers can then wear, for example, a steel or chrome sheath.
  • the coating medium with which the material web 10 is to be coated is first applied to the rollers 14, 16 in a manner not shown in detail, but in a generally known manner. From there, the coating medium is then transferred to the material web 10. Doctor blades 32, 34 are used for Dosing and equalization of the coated on the rollers 14, 16 coating medium. Such squeegee units are well known in the art and require no further explanation in connection with the present invention.
  • the quantity and thickness of the medium applied to the material web 10 are influenced by the nip load prevailing in the application gap 12, which is the pressing force which is transmitted between the rolls 14, 16.
  • the coating unit is equipped with a sensor arrangement which directly detects the transmitted pressing force.
  • the sensor arrangement is arranged in the transmission path of the pressing force and measures the latter prior to introduction into or / and after exit from the rollers bodies of the roller pair 14, 16.
  • the sensor arrangement in the embodiment of Fig. 1 at least one force sensor 36, which is attached to the bearing lever 24 or the stator 22 and its sensor signal to the control unit 30 supplies. In principle, it is sufficient to provide only one such force sensor 36 along the transmission path of the pressing force.
  • the force sensor 36 is preferably attached to that of the components: bearing lever 24 and stator 22, which are the lower wrapper through the web 10 carries. In this way, the influence of the web tension on the force measurement can be minimized.
  • both the bearing lever 24 and the stator 22 can be provided with at least one force sensor 36, which makes it possible to control the measured pressing force by comparing the sensor signals.
  • the bearing lever 24 or the stator 22 will be provided axially on either side of the roller pairing 14, 16, each with a force sensor 36 in order to be able to obtain at least approximately information about the axial distribution of the Niplast.
  • Fig. 1 only the force sensor 36 attached to the stand 22 is arranged according to the invention.
  • force sensors 36 may be constructed, for example, from outside of the bearing lever 24 and the stator 22 applied strain gauges, which detect the elastic deformation of the bearing lever 24 and the stator 22 occurring due to the mutual contact pressure of the rollers 14, 16.
  • strain gauges which detect the elastic deformation of the bearing lever 24 and the stator 22 occurring due to the mutual contact pressure of the rollers 14, 16.
  • the interconnection of several such strain gauges in bridge circuits is known per se from the prior art.
  • the control unit 30 effects a suitable activation of the force device arrangement 26 in order to obtain a desired pressing force predetermined by an operator, for example, by input at a control console and to maintain it as part of an automatic control.
  • the to be adjusted pressure force will be equal in most applications in both axial end portions of the pair of rollers 14, 16, so that a consistent over the machine width line pressure results.
  • the control unit 30 can also be designed to determine from the sensor signals the vibration behavior of the roller pairing 14, 16 and to control the power device arrangement 26 in the sense of influencing the vibration.
  • the force provided by the power device assembly 26 may be transmitted substantially exclusively via the rollers 14, 16 as a single power transmission path.
  • the coating is generally stiffer and less susceptible to vibration by transmitting the force provided by the power device assembly 26 in a plurality of power transmission paths.
  • Fig. 1 a pair of cooperating stopper body 38, 40 shown, one of which is arranged on the bearing lever 24 and the other of which is arranged on the stator 22.
  • One of the stop elements 38, 40 - here the stopper body 38 - is adjustable by means of a controllable by the control unit 30 positioning member 42, for example a Spindelhubglieds.
  • two force transmission paths are available for the force provided by the force device arrangement 26: a first, which runs over the rollers 14, 16, and a second, which runs over the stop bodies 38, 40.
  • the at least one force sensor 36 is located in the over the rollers 14, 16 extending force transmission path at a point after its branch from the second power transmission path and before the reunification with the second power transmission path. In this way, the actual pressure force is still detected by the force sensor 36 immediately, and any distortions or thermally induced deformations within the coating unit can not falsify the measurement result.
  • the force device arrangement 26 preferably always applies a maximum force to the bearing lever 24.
  • the desired pressing force is then, depending on the supplied sensor signal of the force sensor 36, by suitable adjustment of the Stop body 38 is set.
  • the stopper body 38 to the left in Fig. 1 the reverse applies.
  • stopper body 38, 40 is arranged on both axial sides of the roller pairing 14, 16, wherein these pairs are preferably independently adjustable by means of a respective positioning member 42.
  • Fig. 2 are identical or equivalent components with the same reference numerals as in Fig. 1 provided, but supplemented by a lowercase letter. Since only differences from the previous exemplary embodiment are to be discussed below, for explanations of these components, reference is made to the preceding description of FIG Fig. 1 directed.
  • Fig. 2 shows an embodiment in which one or more, not shown in detail sensor elements, such as strain gauges are housed in a load cell 36a, which forms a mechanically sealed, separate component, which is installed between the bearing lever 24a and a bearing assembly 46a, the storage an axial bearing pin 48a of the roller 14a is used.
  • a load cell may also be installed between the machine stand and the other roller.
  • the bearing assembly 46a includes a bearing housing 50a and a rolling bearing 52a received therein an inner ring 54a and an outer ring 56a.
  • the load cell 36a may be, for example, a commercially available force measuring block, as sold by the company FMS Force Measuring Systems AG, Switzerland.
  • the use of the load cell 36a has the advantage that the sought force passes through them exactly and standard components standardized for the bearing housing 50a and the roller bearing 52a can be used.
  • the bearing pin 48a could also be extended to a measuring bolt by attaching one or more suitable sensor elements to it. This is in Fig. 2 indicated by dashed lines at 36b. Furthermore, it is possible to mount such sensor elements in the bearing housing 50a. The bearing lever 24a could then remain structurally unchanged. and for the Wälzlaaer 52a could in turn be resorted to a standard component.
  • the rolling bearing 52a comes into consideration.
  • one or more sensor elements can be retrofitted, for example, on the outer ring 56a.
  • the rolling elements of the rolling bearing 52a cause under load elastic deformations of the outer ring 56a, which are a measure of the transmitted force and can be detected.
  • a rolling bearing 52a with an integrated force sensor that is to say a bearing which has already been prepared by the manufacturer with suitable force detection elements. Without constructive changes, the bearings of existing coating units can then be replaced by such "measuring bearings".
  • the coating color, with which the material web 10 is to be coated is first applied in a manner not shown, but known per se, to the rollers 14, 16, which in turn transfer the coating color to the material web 10.
  • Doctor blades 32, 34 are used for metering and equalizing the coating applied to the rollers 14, 16 coating color.
  • the squeegee unit 32 has a squeegee bar 136 in which a squeegee rod 138 is rotatably supported.
  • the doctor bar 136 is in turn attached to a pivot arm 140 which is pivotally connected to the bearing lever 24.
  • the pivot arm 140 can be approximated to the moving roller 14 and so the squeegee rod 138 pressed against the surface of the roller 14.
  • the squeegee assembly 34 includes a squeegee bar 144, a squeegee rod 146, and a pivot arm 148 pivotally mounted to the machine stand 22 which is engageable with the fixed roller 16 by means of a pivot drive assembly 150 supported between the machine stand 22 and the pivot arm 148.
  • the pivoting drive assemblies 142, 150 are preferably each formed by at least one hydraulic piston-cylinder unit.
  • the amount and thickness of the paint applied to the material web 10 are influenced by the nip load prevailing in the application nip 12, that is to say the pressing force which is transmitted between the rolls 14, 16.
  • the rollers 14, 16 are pressed against one another, their covers 128, 130 are compressed and flattened in the region of the application gap 12, which results in a reduction of the distance between the axes 18, 20 of the rollers 14, 16.
  • a measure of the transmitted pressing force and thus the Niplast order gap 12 In the elastic region of this compression of the covers of the mutual center distance, which is denoted in the figure with e, a measure of the transmitted pressing force and thus the Niplast order gap 12.
  • This spring corresponding behavior of the pair of rollers 14, 16 is in the illustrated coating used to set a certain desired Niplast in the brushing operation.
  • a spring characteristic which indicates the dependence of the axial distance e of the transmitted pressing force, looked up, which center distance must be set concretely to obtain this desired pressing force.
  • the spring characteristic is data-technically deposited in an electronic memory 152, accessing the memory contents of a microprocessor-based electronic control unit 30.
  • the data representation of the spring characteristic in memory 152 may be a formulaic one. Frequently, however, the spring characteristic becomes tabular be stored in the form of a plurality of pairs of values, each of these value pairs for a value of the pressing force includes an associated value of the axial distance e or a representative of the axial distance e size.
  • positioning member 42 which is preferably designed as an electric motor driven spindle lifting member.
  • the positioning member 42 is used to adjust a relative to the machine stand 22 stationarily arranged first stopper body 38, which is intended to cooperate with a fixedly arranged on the bearing lever 24 second stopper body 40.
  • the bearing lever 24 is pivoted by means of the power device assembly 26 toward the fixed roller 16 until the two stopper body 38, 40 abut each other.
  • the center distance e of the rollers 14, 16 depends in this working position on the position of the first stopper body 38. By adjusting the first stop body 38 thus the center distance e can be changed.
  • control unit 30 controls the positioning member 42 in accordance with the information obtained from the spring characteristic in such a way that the value of the center distance e which corresponds to a desired nip load is set.
  • This desired Niplast is communicated to the control unit 30, for example via an operator not shown in detail by an operator.
  • the determination of the spring characteristic takes place in a preceding the actual operation of the coating plant calibration phase.
  • the first stop body 38 is moved back by means of the positioning member 42 in the figure to the left.
  • the bearing lever 24 is pivoted by means of the power device assembly 26 in the direction of the fixed roller 16, until the rollers 14, 16 substantially free of force transmission, ie without generating a Niplast touch.
  • This condition can be detected, for example, by an operator by means of a paper strip which she holds in the order gap 12. With stationary rollers 14, 16, the desired state is reached when the paper strip can just pull through the application gap 12.
  • the achievement of the desired condition can be recognized by the rollers 14, 16 starting to pick on the paper strip.
  • the first stopper body 38 is advanced again by means of the positioning member 42 until it comes into contact with the second stopper body 40.
  • the contact is detected by means of a sensor 62, which may be, for example, a touch sensor, but also a force transducer.
  • This position of the first stopper body 38 is then stored by the control unit 30. It represents a value of the axial distance e, in which substantially no pressing force between the rollers 14, 16 is transmitted, ie the zero point of the spring characteristic.
  • At least one further characteristic point must be recorded at a defined niplast. This may be, for example, the end point of the spring characteristic, in which there is a maximum nip load for which the coating is intended and designed.
  • the first stopper body 38 is retracted again by means of the positioning member 42 until it is out of the range of the second stopper body 40. Then, by activating the power device assembly 26, such a force is introduced into the bearing lever 24 that the roller 14 is pressed against the roller 16 to produce a nip load.
  • the line load prevailing in the application gap 12 can be readily calculated from the force provided by the power device assembly 26, at least as long as the stopper bodies 38, 40 are out of contact and no force is transmitted between them.
  • the first stopper body 38 is moved by means of the positioning member 42 back to the second stopper body 40 until it comes into contact with the latter.
  • the contact production is in turn detected by the sensor 62.
  • the position occupied by the first stopper body 38 at the moment of making contact is different from the zero point determination of the spring characteristic.
  • control unit 30 can interpolate the entire curve, if desired, stepwise.
  • more than two characteristic points can be recorded in the calibration phase.
  • approximately the entire spring characteristic can be recorded by measurement. It is also understood that, instead of the zero and the end point of the spring characteristic, any two other characteristic points lying in between can be picked up and made the basis for a subsequent characteristic interpolation.
  • the Niplast maximum and therefore the center distance e is minimal. If a lower Niplast be set, so causes the control unit 30 based on the memory 152 stored in the characteristic data an adjustment of the first stop body 38 by a corresponding amount in the direction of the second stop body 40. This increases the center distance e between the rollers 14, 16, so that the flattening of the roller covers 128, 130 in the application gap 12 is lower and the Niplast decreases accordingly.
  • the difference proportion between this provided force and the force transmitted via the rollers 14, 16 is transmitted via the two stop bodies 38, 40.
  • the total power provided thus branches into a first power transmission path, which leads over the rollers 14, 16, and a second power transmission path, which leads over the stopper body 38, 40.
  • the desired nip load can accordingly be obtained in a simple manner by appropriate adjustment of the first stop body 38.
  • a distance sensor 64 may be provided; whose sensor signals are evaluated by the control unit 30 and, if necessary, converted into corresponding correction signals to the positioning member 42. In this way, a control loop can be set up which keeps the center distance e constant at a desired value.
  • the distance sensor 64 may be, for example, an optical sensor. Of course, other sensor principles are conceivable.
  • the sensor 62 allows detection of the transmitted force on the stopper body 38, 40, instead of a distance control and a force control can be set up immediately. Because the over the stopper body 38, 40 transferred force with knowledge of the Kraftelloanowski 26 total force provided directly back to the Niplast in the order column 12, the sensor signals of the sensor 62 can be used to control the position of the first stop body 38.
  • positioning member 42 and stopper members 38, 40 is suitably provided on both axial sides of the pair of rollers 14, 16, wherein each positioning member 42 is preferably independently controllable.
  • each positioning member 42 is preferably independently controllable.
  • the center distance e can be set independently on both axial sides. This makes it possible to adjust an axially changing line load in the application gap 12, although in many applications a constant line load will be desired. At the same time, this makes it possible to compensate for fluctuations in the axial distance e occurring during operation, which possibly only occur locally on one axial side, individually.
  • maximum force is meant that force which would result in the maximum nip load if the force alone would be transmitted via the roller pairs 14, 16.
  • the sensor 62 arranged in this force transmission path is designed as a force sensor in the alternative procedure described here. The force value that it detects when fully extended first stop body 38 and maximum force of the power device assembly 26 is stored by the control unit 30.
  • the roller 14 is now moved back again, and by actuation of the positioning member 42, the first stop body is brought into a rear, fully retracted end position. Subsequently, the roller 14 is pivoted back to the roller 16 with maximum force of the power device assembly 26.
  • the rear end position of the first stopper body 38 is adjusted so that the second stopper body 40 does not abut against the first stopper body 38. In order column 12, therefore, there is maximum Niplast.
  • the first stopper body 38 is advanced by means of the positioning member 42 until it comes into contact with the second stopper body 40.
  • the contact between the two stop members 38, 40 is detected from the signal of the force sensor 62, for example, when the control unit 30 detects a change in the measured force by a predetermined value.
  • the position thus achieved of the first stopper body 38 is stored; it represents the end point of the spring characteristic, in which there is a maximum niplast in the application gap 12.
  • the first stopper body 38 is then further extended.
  • the force transmitted via the stop elements 38, 40 increases.
  • the positioning member 42 is stopped and the position of the first stopper body 38 is stored. It corresponds to the zero point the spring characteristic. From the zero and end points of the spring characteristic determined in this way, it is then possible, by linear interpolation, to successively calculate several characteristic intermediate points.
  • the above-described alternative procedure for determining the spring characteristic has the advantage that no different forces have to be set on the force device arrangement 26, but that it is sufficient to set only the maximum force on the force device arrangement 26 in order to determine both the characteristic zero point and the characteristic curve. Determine endpoint.
  • the time required for the calibration of the coating system is lower, since only a reversal of the direction of travel of the positioning member 42 is required.
  • first and second stopper body 38, 40 are measured on each axial side by means of the respective force sensor 62, which force is transmitted to the respective pair of first and second stopper body 38, 40. If the first roller 14 is aligned exactly parallel to the axis of the second roller 16, then these force values are the same. On the other hand, if there is an inclination of the first roller 14 relative to the second roller 16, different force values result. The two force values thus determined are stored by the control unit 30. Then - as before - the first stopper body 38 is moved to its rear end position and extended from this rear end position to the contact with the respectively associated second stopper body 40 again.
  • both first stopper members 38 are moved together toward their front end position until the force sensors 62 indicate the force value originally stored for the respective axial side.
  • the two positioning members 42 are then stopped simultaneously and their position or that of the first stopper body 38 as a zero-Niplast, i. Defined and saved as characteristic zero point.
  • the power device arrangement 26 is force-controlled.
  • a path-controlled embodiment of the force device assembly 26 is selected, for example using a spindle drive, then the abutment members 38, 40 and the positioning member 42 may be dispensed with and a desired center distance e instead set directly using the force device assembly 26.
  • only one power transmission path would exist, passing over the rollers 14, 16, so that this example would not be in accordance with the invention.
  • the provision of at least one further force transmission path as it is formed in the illustrated embodiment by the positioning member 42 and the stopper body 38, 40, has the advantage that the coating unit overall stiffer and thus less susceptible to vibrations can be made.
  • the invention allows a very precise adjustment of a desired Niplast, especially when it is relatively low. Due to the high precision of the niplaste setting, a high-quality coating result can be achieved irrespective of the roll diameter, the roll cover thickness, the roll hardness and possible tension.
  • the high precision of the niplaste setting helps to minimize contact vibrations between the rolls.
  • the ability to precisely set even very low nip loads also helps to reduce the so-called “misting", which is a mist-like spraying of the coating color at the outlet of the order gap and can affect the coating result.

Landscapes

  • Coating Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
  • Advancing Webs (AREA)
  • Feeding Of Workpieces (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Replacement Of Web Rolls (AREA)

Claims (20)

  1. Agencement, comprenant deux cylindres d'axes parallèles et pouvant être rapprochés l'un de l'autre (14, 16) aptes à être utilisés dans un système de couchage pour l'application en surface d'un agent de couchage liquide ou pâteux sur une bande de matériau en mouvement (10), en particulier en papier ou en carton, ainsi que dispositif pour la compression mutuelle des cylindres (14, 16), qui comprend:
    - des moyens de production de force (26) destinés à engendrer une force qui peut être transmise au moins en partie dans un chemin de transmission de force passant par les cylindres (14, 16) pour produire une force de compression entre les cylindres (14, 16), et
    - des moyens de détection (36; 36a; 36b) destinés à détecter la force de compression entre les cylindres (14, 16),
    dans lequel les moyens de détection (36; 36a; 36b) sont disposés, à l'extérieur des corps de cylindre des deux cylindres (14, 16), dans, sur ou le long du chemin de transmission de force (25) passant par les cylindres (14, 16) à partir des moyens de production de force (26),
    caractérisé en ce que la force engendrée par les moyens de production de force (26) bifurque sur le chemin de transmission de force passant par les cylindres (14, 16) et au moins un autre chemin de transmission de force (38, 40) et en ce que les moyens de détection (36) sont disposés dans, sur ou le long du chemin de transmission de force (25) passant par les cylindres (14, 16) après sa bifurcation d'avec l'autre chemin de transmission de force (38, 40) et avant une nouvelle réunification avec l'autre chemin de transmission de force (38, 40).
  2. Agencement selon la revendication 1, caractérisé en ce que le rapport des forces transmises par les différents chemins de transmission de force peut être modifié.
  3. Agencement selon la revendication 2, caractérisé en ce que des moyens de butée (38, 40) sont disposés dans l'autre chemin de transmission de force, lesquels sont déplaçables pour faire varier le rapport des forces transmises par les différents chemins de transmission de force.
  4. Agencement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur (36), qui est disposé avant le corps de cylindre d'un premier (14) des deux cylindres (14, 16) qui suit par rapport à la direction de transmission de force du chemin de transmission de force passant par les cylindres (14, 16).
  5. Agencement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur (36), qui est disposé après le corps de cylindre d'un deuxième (16) des deux cylindres (14, 16) qui suit par rapport à la direction de transmission de force du chemin de transmission de force passant par les cylindres (14, 16).
  6. Agencement selon la revendication 4 et 5, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur (36) disposé avant le corps de cylindre du premier cylindre qui suit (14) et au moins un détecteur (36) disposé après le corps de cylindre du deuxième cylindre qui suit (16).
  7. Agencement selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'un (16) des deux cylindres (14, 16) est monté sur une cage (22) de façon fixe mais rotative par rapport à celle-ci, en ce qu'un levier d'appui (24) supportant de façon rotative l'autre cylindre (14) est installé sur la cage (22), lequel peut pivoter par rapport à la cage (22) pour rapprocher les deux cylindres (14, 16) l'un de l'autre, et en ce que les moyens de production de force (26) agissent sur le levier d'appui (24).
  8. Agencement selon la revendication 7, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur (36), qui est placé sur le levier d'appui (24) ou sur la cage (22).
  9. Agencement selon la revendication 7 ou 8, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur (36b), qui est disposé dans une zone d'appui d'un des cylindres (14, 16).
  10. Agencement selon la revendication 9, caractérisé en ce que le détecteur (36b) est placé sur un tourillon (48a) du cylindre concerné (14a).
  11. Agencement selon la revendication 9, caractérisé en ce qu'un palier de roulement (52a) entourant un tourillon (48a) du cylindre concerné (14a) est muni du détecteur.
  12. Agencement selon la revendication 11, caractérisé en ce que le détecteur est intégré dans le palier de roulement (52a).
  13. Agencement selon la revendication 11, caractérisé en ce que le détecteur est installé sur une bague extérieure (56a) du palier de roulement (52a).
  14. Agencement selon la revendication 9, caractérisé en ce que le détecteur est placé sur un corps de palier (50a), dans lequel est installé un palier de roulement (52a) entourant un tourillon (48a) du cylindre concerné (14a).
  15. Agencement selon l'une quelconque des revendications 7 à 14, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent au moins un détecteur, qui est installé dans un module de détection fabriqué séparément (36a), dans lequel ce module de détection (36a) est monté entre la cage ou le levier d'appui (24a) et un ensemble de palier (46a) pour un tourillon (48a) du cylindre (14a) appuyé sur la cage ou le levier d'appui (24a).
  16. Agencement selon l'une quelconque des revendications 1 à 15, caractérisé en ce que les moyens de détection (36; 36a; 36b) comprennent, pour la détection de la force, au moins un élément sensible à la traction et/ou à la compression, en particulier une jauge de contrainte.
  17. Agencement selon l'une quelconque des revendications 1 à 16, caractérisé par une unité de commande électronique (30) réagissant aux moyens de détection (36; 36a; 36b) et commandant les moyens de production de force (26), laquelle est conçue pour le maintien régulé d'une valeur de consigne prédéterminée de la force de compression entre les cylindres (14, 16).
  18. Agencement selon la revendication 17, caractérisé en ce que les moyens de production de force (26) comprennent, dans la région des deux extrémités axiales de la paire de cylindres (14, 16), chaque fois au moins un appareil de force (28), en particulier hydraulique, pouvant être commandé indépendamment, et les moyens de détection (36; 36a; 36b) sont conçus de façon à déterminer indépendamment l'un de l'autre la force de compression dans les deux régions d'extrémité axiales de la paire de cylindres (14, 16).
  19. Agencement selon la revendication 18, caractérisé en ce que l'unité de commande (30) est conçue pour commander l'appareil de force (28) de telle manière qu'il en résulte une pression linéique essentiellement constante entre les cylindres (14, 16) sur la longueur axiale de la paire de cylindres (14, 16).
  20. Agencement selon l'une quelconque des revendications 1 à 19, caractérisé en ce que la bande de matériau (10) est guidée entre les deux cylindres (14, 16) et au moins un des cylindres (14, 16) assure le transfert de l'agent de couchage sur la bande de matériau (10).
EP04019300A 2001-05-23 2002-05-22 Agencement destiné à comprimer deux cylindres d'axes parallèles pouvant être rapprochés l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de matériau Expired - Lifetime EP1493867B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10125379 2001-05-23
DE10125378 2001-05-23
DE2001125379 DE10125379A1 (de) 2001-05-23 2001-05-23 Vorrichtung zum gegenseitigen Andrücken zweier Walzen in einem Streichwerk
DE2001125378 DE10125378A1 (de) 2001-05-23 2001-05-23 Verfahren zur Einstellung der Anpressung zweier aneinander annäherbarer achsparalleler Walzen sowie Anordnung zum gegenseitigen Andrücken solcher Walzen
EP02743073A EP1392918B1 (fr) 2001-05-23 2002-05-22 Dispositif, procede et systeme destines a comprimer deux cylindres d'axes paralleles pouvant etre rapproches l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de materiau

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP02743073.5 Division 2002-05-22
EP02743073A Division EP1392918B1 (fr) 2001-05-23 2002-05-22 Dispositif, procede et systeme destines a comprimer deux cylindres d'axes paralleles pouvant etre rapproches l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de materiau

Publications (3)

Publication Number Publication Date
EP1493867A2 EP1493867A2 (fr) 2005-01-05
EP1493867A3 EP1493867A3 (fr) 2007-12-26
EP1493867B1 true EP1493867B1 (fr) 2010-04-14

Family

ID=26009379

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04019300A Expired - Lifetime EP1493867B1 (fr) 2001-05-23 2002-05-22 Agencement destiné à comprimer deux cylindres d'axes parallèles pouvant être rapprochés l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de matériau
EP02743073A Expired - Lifetime EP1392918B1 (fr) 2001-05-23 2002-05-22 Dispositif, procede et systeme destines a comprimer deux cylindres d'axes paralleles pouvant etre rapproches l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de materiau

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02743073A Expired - Lifetime EP1392918B1 (fr) 2001-05-23 2002-05-22 Dispositif, procede et systeme destines a comprimer deux cylindres d'axes paralleles pouvant etre rapproches l'un de l'autre dans une installation de fabrication et/ou de traitement d'une bande de materiau

Country Status (6)

Country Link
US (2) US7018475B2 (fr)
EP (2) EP1493867B1 (fr)
JP (1) JP2004527373A (fr)
AT (2) ATE464430T1 (fr)
DE (2) DE50212233D1 (fr)
WO (1) WO2002095126A2 (fr)

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* Cited by examiner, † Cited by third party
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CN103502530B (zh) * 2011-02-18 2016-03-02 维美德瑞典公司 具有扩展压区的压榨装置、造纸机及操作压榨装置的方法
SE536201C2 (sv) * 2011-07-28 2013-06-25 Metso Paper Sweden Ab En maskin för framställning av Tissue-papper och en metod att köra en sådan maskin
US9079739B2 (en) * 2012-11-02 2015-07-14 The Procter & Gamble Company Apparatus for controlling the nip force/pressure between two rotating cylinders
US9073282B2 (en) * 2012-11-02 2015-07-07 The Procter & Gamble Company Process for controlling the nip force/pressure between two rotating cylinders
WO2014161755A1 (fr) * 2013-04-05 2014-10-09 Voith Patent Gmbh Presse de pelliculage
DE102013208808A1 (de) * 2013-05-14 2014-11-20 Voith Patent Gmbh Filmpresse und Verfahren zum Betrieb einer Filmpresse
CN104226551B (zh) * 2014-10-10 2016-08-24 哈尔滨电机厂有限责任公司 冲片涂漆辊传动装置
US11246330B2 (en) * 2018-01-26 2022-02-15 Chris Deakin System and method for flaking
ES2831502T3 (es) 2018-05-28 2021-06-08 Buehler Ag Dispositivo de trituración
DE102018219715B3 (de) 2018-11-16 2020-01-16 Koenig & Bauer Ag Vorrichtung und eine bogenverarbeitende Maschine zum Behandeln von Substraten
CN115362030A (zh) * 2020-04-28 2022-11-18 Io技术集团公司 无线可变间隙涂布机装置
FI130099B (en) 2022-02-16 2023-02-17 Etteplan Oyj A sensor device for detecting deformation of pressure roll

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Also Published As

Publication number Publication date
JP2004527373A (ja) 2004-09-09
US7018475B2 (en) 2006-03-28
WO2002095126A3 (fr) 2003-09-12
EP1493867A3 (fr) 2007-12-26
US20040185171A1 (en) 2004-09-23
US20060081179A1 (en) 2006-04-20
EP1392918B1 (fr) 2008-05-07
ATE394543T1 (de) 2008-05-15
ATE464430T1 (de) 2010-04-15
DE50214376D1 (de) 2010-05-27
DE50212233D1 (de) 2008-06-19
EP1493867A2 (fr) 2005-01-05
EP1392918A2 (fr) 2004-03-03
US7445693B2 (en) 2008-11-04
WO2002095126A2 (fr) 2002-11-28

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