EP0870598B1 - Vorrichtung zum Herstellen einer beschichteten Materialbahn - Google Patents

Vorrichtung zum Herstellen einer beschichteten Materialbahn Download PDF

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Publication number
EP0870598B1
EP0870598B1 EP98106093A EP98106093A EP0870598B1 EP 0870598 B1 EP0870598 B1 EP 0870598B1 EP 98106093 A EP98106093 A EP 98106093A EP 98106093 A EP98106093 A EP 98106093A EP 0870598 B1 EP0870598 B1 EP 0870598B1
Authority
EP
European Patent Office
Prior art keywords
gluing
roller
force
cylinder
sizing
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
EP98106093A
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English (en)
French (fr)
Other versions
EP0870598A1 (de
Inventor
Dieter Pallas
Jens Schulz
Jörg Vonderheiden
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.)
BHS Corrugated Maschinen und Anlagenbau GmbH
Original Assignee
BHS Corrugated Maschinen und Anlagenbau GmbH
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Publication of EP0870598A1 publication Critical patent/EP0870598A1/de
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Publication of EP0870598B1 publication Critical patent/EP0870598B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2818—Glue application specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2831—Control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1016—Transverse corrugating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers

Definitions

  • the present invention relates to a device for manufacture of a laminated strip, which has at least a corrugated band and at least one flat band glued to undulations of the corrugated strip, the device comprising at least one fluted roll for shaping and / or the conservation of the shape of the corrugated strip which, in use, is covered over a portion of its circumference by the corrugated band, and a unit sizing intended to apply a liquid adhesive used to bind the corrugated band to the flat band, the unit sizing having a sizing cylinder coated with permanence on its envelope surface of an adhesive film and with an axis substantially parallel to the corrugated cylinder, gluing cylinder which is driven with a speed device approximately identical to the speed fluted cylinder device and which, by means of approximation, can be reconciled with its surface of envelope against the circumference portion of the cylinder grooved covered by the corrugated band forming a gluing slot in a state of bringing together causing the transfer of adhesive on the corrugations of
  • Such a device known from EP 0 734 849 A1 is used for example for the manufacture of corrugated cardboard, in particular cardboard corrugated single sided.
  • a strip of cardboard or paper is introduced between a pair of fluted rollers and pressed into a corrugated band.
  • the corrugated band is pressed by appropriate means, for example by producing an overpressure in space surrounding the fluted cylinders and the cylinder sizing, against the grooved cylinder following the slot embossing in the tape scrolling direction corrugated, and passes in front of the sizing cylinder, where the adhesive is transferred from the sizing roll to the undulations of the corrugated band.
  • the gluing gap is between the gluing cylinder and the grooved cylinder located in vis-à-vis is dimensioned so that the undulations of the corrugated strip sinks into the applied adhesive film on the sizing cylinder, without being pressurized or come in contact with the envelope surface of the gluing cylinder. So, a distance is always between the undulations of the corrugated band and the envelope surface of the sizing cylinder.
  • the thickness adhesive film is usually in the range of 0.15 to 0.40 mm. In conventional devices of manufacture of corrugated board, the gluing gap between the sizing cylinder and the fluted cylinder must therefore be adjusted with a corresponding precision.
  • the gluing slot should not be too large, to ensure that the ripples of the band corrugated actually sink into the adhesive film.
  • a possibility of exact adjustment of the width of the gluing gap lies in the fact that an operator holds by hand a thick test strip predetermined distance (for example 0.07 mm) between fluted cylinder carrying the corrugated band and the cylinder gluing. We then gradually bring the sizing cylinder of the fluted cylinder. This is done with the rotating fluted cylinder and the cylinder sizing in rotation. We reduce the gluing gap until there is traction on the test strip. The effective gap between the sizing cylinder and the undulations of the corrugated band on the cylinder fluted is thus adjusted to the thickness of the strip test (thus for example 0.07 mm).
  • the seaming slot has the disadvantage that the width of the sizing slot is adjusted only only once before putting into operation the corrugated board manufacturing and monitoring and subsequent adjustment during operation are not possible. Moreover, for the operator, he is not without risk of bringing his hand closer to the test strip between the sizing cylinder and the grooved cylinder in rotation. As soon as he feels a pull on the band test, he shall immediately release the test strip, not to risk seeing his fingers driven into the gluing slot. In so-called single-sided machines intended for the manufacture of single-sided corrugated board in which the corrugated band is held on the cylinder grooved by an overpressure, this type of adjustment of the gluing slot is excluded.
  • a distance sensor without contact is attached to a frame of the gluing unit in the immediate vicinity of the sizing cylinder, which sensor measures the distance to a target point on a medium of fluted cylinder.
  • the value measured by the sensor distance thus indicates the width of the slot present at distance sensor level between the cylinder frame sizing and the support of the fluted cylinder.
  • Another method is to report as above a sensor distance on the frame of the gluing unit, but choose as the target point for distance measurement a smooth flange placed outside the flute area of the fluted cylinder.
  • the position of an abutment adjustable, against which the gluing unit is pushed in order to adjust in a defined way the width of the slot sizing is determined by a suitable sensor, by example a rotation angle indicator or a sensor of position.
  • a displacement of the stop and therefore a change in the width of the sizing slot echoes in a corresponding variation of the signal of measurement delivered by the sensor.
  • the position of the stop so represents a measure of the width of the slot gluing.
  • the three measurement methods mentioned have in common do not include a direct measurement of the measuring slot, whose breadth is the interesting quantity. In all cases, a measurement of distance or position outside the slot of measured. It turned out that the values of distance or position thus obtained allow only conclusions unsatisfactory on the actual width of the slot gluing. On the one hand, conditions at the level of measuring points may differ from those level of the sizing slot. On the other hand, the sensors distance and position available work with a comparatively low accuracy in the conditions working in a machine manufacturing corrugated board, so it is necessary to proceed to regular intervals to a surveillance of the device of measurement and, if necessary, to a corrective adjustment.
  • the measuring system must also be able to detect variations due to the temperature of the width of the gluing slot, in order to readjust subsequently the width of the slot so appropriate. Given the difficulties which, in the conventional measurements of distance or position, already accompany the measurement of the basic setting of the slot sizing, precise determination of variations thermal origin of the width of the gluing gap is very difficult. This is true especially when considers that the temperature conditions at the places which sensors are located may differ considerably prevailing temperature conditions actually in the vicinity of the sizing slot.
  • the objective of the present invention is therefore to facilitate the adjustment of the gluing gap in a device of the type mentioned in the introduction.
  • the means of approximation are shaped to press the sizing cylinder against the corrugated tape and corrugated tape against the cylinder fluted.
  • the sizing cylinder is pressed with its surface of envelope against the corrugated band placed on the cylinder fluted, that is to say against the ripples of the band corrugated.
  • the cylinder sizing presses the corrugated strip and causes a some discharge of the adhesive towards the flanks lateral ripples. Yet, it turned out surprisingly that such an effect does not appear.
  • the means of approximation include adjusting means for adjusting a force predetermined support between the sizing roll and the fluted cylinder, so that, for example for various glue or various grades of paper, conditions of force each time well-defined can be adjusted in the sizing slot.
  • the means of bringing together comprise means of regulation in order to maintain a regulated predetermined support between the sizing roll and the fluted cylinder.
  • a command reference force imposed from outside and stored in a control unit is then compared with a measured real support force and, in case of deviation, a corresponding adjustment of the force support until the gap is removed. It is possible to store as a table in the unit control a plurality of values for the support force of deposit, which are selected according to parameters like paper quality, type of glue or the viscosity of the glue.
  • the supporting force acting on the corrugated band will be chosen so that it does not appear weakening of the material of the corrugated band.
  • a maximum linear pressure between 0.1 N / mm and 10.0 N / mm, preferably between 0.3 N / mm and 5.0 N / mm, more preferably between 0.5 N / mm and 3.0 N / mm, is transferred.
  • the pressing force acting in the sizing slot between the sizing cylinder and the grooved cylinder is a parameter that influences the final qualities of the product glue.
  • Another important parameter for the properties of the product is the oscillation behavior of the width of the gluing gap. The reason is as follows: pressing the sizing cylinder against the tape corrugated and corrugated tape against the fluted cylinder, a mechanical coupling of the sizing cylinder to the cylinder fluted is established.
  • Oscillations can then be induced, whose frequency or frequencies depend inter alia of the grooves of the fluted cylinder and speeds sizing cylinder and cylinder peripherals fluted. Oscillations can cause variations the width of the sizing slot and modify the pressure conditions between the sizing cylinder and the corrugated band. Therefore, the quality of the transfer of adhesive on the corrugations of the corrugated strip and, finally, the properties of the glued finished product can be subject to fluctuations. As a result, the oscillatory behavior of the width of the slit sizing is also a parameter that can have consequences on the properties of the product.
  • the active support force in the slot sizing between the fluted cylinder and the cylinder sizing and / or the oscillatory behavior of the width of the gluing gap between the fluted cylinder and the sizing cylinder are adjusted or adjustable in function of the properties of a finished or intermediate product previously glued, if desired according to other parameters influencing the properties of the product, eg film thickness of adhesive, the viscosity of the adhesive, the properties adhesives, the properties of the material of the corrugated band, especially the absorption capacity of the corrugated band, the wetting conditions between the corrugated tape and adhesive, and peripheral speeds of the fluted cylinder and the sizing cylinder.
  • finished products or intermediary previously stuck are therefore examined in terms of certain properties and determine if the properties of the product correspond to a desired quality criterion or required. If deviations occur, the support force and / or the oscillatory behavior of the sizing slot can be modified to improve quality.
  • Such will be certainly the case in the context of tests before putting in actual service of the manufacturing facility but this can also be done in service, for example in submitting various finished or intermediate products to a control and adjusting correspondingly, the case the active support force and / or behavior Oscillation of the gluing gap with the machine in road.
  • a sizing pattern can be used at the undulations of the corrugated band, preferably a series of sizing patterns in successive areas undulations.
  • Such a ripple pattern can be examined by optical observation, in particular after staining prior.
  • a glue composed of dispersed and / or dissolved starch in water.
  • Starch present in transferred glue on the undulations of the wavy band can be colored by chemical treatment, for example using iodine, for thus revealing in which areas of the undulations corrugated tape too much glue or too weak has been applied.
  • Staining of starch thus allows to obtain a sizing scheme, using which quality can be assessed and in particular the uniformity of the transfer of adhesive on the corrugations of the corrugated band.
  • Oscillations of the width of the gluing gap are manifested for example in the gluing scheme by the fact that some ripples have a relatively low adhesive supply (corresponding to an oscillatory maximum of the width of the sizing slot) and other undulations present a relatively strong adhesive supply (corresponds to a Oscillatory minimum of the width of the slot sizing).
  • the regularity with which the relatively strong adhesive ripples and the ripples with relatively low adhesive intake is a measuring the period of oscillations the width of the gluing slot.
  • the oscillatory behavior of the width of the slot sizing can be adjusted or adjusted by influencing components directly or indirectly involved in the formation of the sizing slot, according to their mass and / or their support depreciation and / or their internal damping and / or elasticity and / or rigidity of their mutual mechanical coupling.
  • the conditions of friction prevailing on the points of support components involved in the formation of the slot sizing are crucial for the depreciation of oscillations appearing in the width of the slot gluing. For example, a setting friction between the sizing unit and the guiding means of this gluing unit allows to obtain a sufficient damping of these oscillations slit width.
  • active bearing force in the sizing slot can be as a parameter for the oscillatory behavior of the width of the sizing slot. It is so possible, if one notes oscillations of the width of the sizing slot, to attempt first to remove these oscillations by a modification of the active support force before influencing the components participating in the formation of the sizing slot at level of the parameters mentioned above.
  • Another measure to delete largely or totally the oscillations of the width of the slit sizing may be due to the fact that a frequency of resonance or resonant frequencies of behavior oscillatory width of the gluing gap be located outside the excitation frequencies related to the speed of rotation of the cylinders and / or at the splines of the cylinder.
  • the resonance behavior of the width of the sizing slot is strongly influenced by the mass of components involved in the formation of the sizing slot, by their inner elasticity and by their reciprocal elasticity, so that a choice appropriate and a mutual adjustment of these parameters allows to avoid resonances of the width of the slit gluing.
  • the oscillatory behavior the width of the sizing slot is chosen from preferably so that in ripple areas successively, we obtain sizing diagrams approximately the same.
  • appropriate measures for adjusting the oscillatory behavior of the width of the slit sizing are advantageously provided for essential at the level of the sizing unit and / or means of approximation and / or guide means of the gluing unit.
  • the sizing cylinder can be placed on a support of gluing cylinder carried by guide means of moving way with respect to the fluted cylinder. Ways approximation may then include at least one means of force production engaging on the support of gluing cylinder to introduce a force into the gluing cylinder support.
  • the guide means preferably form a rectilinear guidance for the sizing cylinder support, in particular such way that the sizing cylinder support can be separated from the fluted cylinder, to allow access to the splined cylinder for possible cleaning and maintenance.
  • the cylinder support gluing can be a guided trolley on wheels, which can be extracted and reintroduced into a chassis of machine.
  • the force made available by the means of production number of at least one can be used completely to produce a supporting force between the gluing cylinder and fluted cylinder.
  • the force put at disposal is here transmitted essentially on a channel of force transmission, which passes through the gluing cylinder and fluted cylinder.
  • the force made available by the means of production of strength to the number of at least one can also be branched, especially in a first way of transmission of force transmitting a supporting force between the sizing cylinder and the fluted cylinder, and least another way of force transmission.
  • This other transmission path of force to the number of at least one may contain stop means, which include preferably at least one stop which is placed in view of mutual displacement with the long sizing cylinder its approach path against the fluted cylinder, and which furthermore comprise at least one counter-stop, which is fixed by relative to the axis of rotation of the fluted cylinder.
  • stop means which include preferably at least one stop which is placed in view of mutual displacement with the long sizing cylinder its approach path against the fluted cylinder, and which furthermore comprise at least one counter-stop, which is fixed by relative to the axis of rotation of the fluted cylinder.
  • a modification of the force of active support between the sizing cylinder and the splined cylinder can be obtained by a modification of the force made available by the means at least one strength production unit.
  • a modification of the active support force between the sizing cylinder and the fluted cylinder can be obtained by the fact that the ratio of transmissible forces on different Force transmission path is modifiable.
  • the ratio of forces on the different channels of force transmission can be modifiable simply by modification of at least one of the components: stop and counter-stop.
  • the force transmitted on the first channel of force transmission is weak compared to the strength provided by the means of force production at the number of at least one.
  • the force induced in the sizing cylinder support by the force producing means of which there are at least one will be relatively small, in accordance with the supporting force between the sizing cylinder and the fluted cylinder, so that the oscillatory coupling of the cylinder sizing on the fluted cylinder will be very low and the tendency to oscillation appearance in the width of the sizing slot will also be largely deleted.
  • This last point applies in particular when the gluing unit has a large mass (some hundreds of kilograms or even a ton or more) and a some friction damping exists between the unit sizing and guide means for the unit gluing.
  • Means of measurement can form with the adjustment means and / or the means of regulation a control loop intended for maintain in a regulated manner a predetermined value of the supporting force or a predetermined profile of the force of support as a function of time or race of reconciliation.
  • sensors dynamometric gauges with strain gauges can be employees, who are robust and allow measures accurate. Any variation in the forces at the slit sizing (for example by thermal influences or variation of the material of the corrugated band) is immediately detected by the measuring means of the force and can be compensated by the regulation loop.
  • the measuring means can be shaped to measure the force made available by the means of production of strength in number of at least one. They can also be shaped to measure the force transmitted on the other way of force transmission to the number of at least one, the force of active support being obtained in the latter case by difference between the force made available by the means of strength production to the number of at least one and strength transmitted on the other way of transmitting force to number of at least one.
  • the peripheral speed of the sizing cylinder is preferably set or adjustable so as to be up to about 5% less than the peripheral speed of the fluted cylinder.
  • the delay of the cylinder sizing with respect to the corrugated strip placed on the fluted cylinder will be of the order of 2%.
  • Figure 1 is shown a machine of manufacture of single-sided corrugated cardboard.
  • a first strip of paper or cardboard 1 forming a corrugated band is glued on one side with a second strip of paper or cardboard 3 serving as a tape cover to form a laminated strip.
  • paper 1 goes first through a preparation area 7, in which it is prepared for the purpose of form and subsequent sizing.
  • the paper tape 1 then arrives in a shaping area 9 with a pair of fluted cylinders 11 and 13 rotating in the same meaning.
  • the two fluted cylinders 11, 13 delimit between them a fluted slot in which the paper tape is embossed and receives its wavy shape.
  • a post sizing 15 according to the shaping zone 9 in the direction of scrolling of the corrugated band 1, the band corrugated 1 is glued on one side.
  • An adhesive is for this applied to the corrugations of the corrugated band 1.
  • the flat strip 3 first passes through a zone of preheating 17 and arrives in a pressing zone 19, where it is pressed with the corrugated band 1, on the face glued therefrom, to form the laminated strip 5.
  • a pressing zone 19 In the pressing zone 19 is placed a cylinder of guiding or pressing 21, which delimits with the cylinder fluted 13 a pressing slot, in which the band plate 3 and the corrugated band 1 are introduced and pressed.
  • the laminated strip 5 thus manufactured is delivered through an output device 23 for the purpose of drying on a drying path 25.
  • the sizing station 15 comprises a sizing unit 27 which, by means of a carriage 29, can be introduced in a machine frame 31 of the manufacturing machine and extracted from it.
  • the carriage 29 is shown with the sizing unit 27 in its position out and dotted in its retracted position.
  • fastening means 33 which, in the retracted position of the carriage 29, are hooked to counter-snap means 35 provided on the machine frame 31.
  • the carriage 29 is thus anchored fixed to the machine frame 31 in the position September. It is mobile on wheels 37 along a lane rolling bearing 39 fixed relative to the machine frame 31 and has on its side a rolling guide 41, on which the sizing unit 27 is guided in rotation by 43.
  • the sizing unit 27 can be moved along the rolling guide 41 by means approximation not shown in Figure 1, which are between the carriage 29 and the sizing unit 27, are moved along the rolling guide 41 and are brought together of the corrugated cylinder 13 in the retracted position of the trolley 29.
  • the sizing unit 27 comprises a cylinder gluing 45, which is driven in the same direction as the fluted cylinder 13 with a peripheral speed approximately the same as the fluted cylinder 13.
  • the sizing cylinder 45 dives with its surface of envelope 47 in an adhesive bath not shown in FIG. detail. As a result of its rotation, an adhesive film is continuously applied glue bath on the surface 47 of the sizing cylinder 45.
  • the sizing unit 27 comprises a cylinder glue dispenser 49, which can be moved closer to the cylinder 45 and delimits with it a slot of adjustable width dosing.
  • the adhesive film formed on the sizing cylinder is accurately dosed in this dosing slot between the sizing cylinder 45 and the glue dosing cylinder 49.
  • the glue dosing cylinder 49 is driven in the opposite direction of the cylinder gluing 45, with a peripheral speed which is about 40-60% of the peripheral speed of the cylinder sizing unit 45.
  • the sizing unit 27 further comprises a carriage 51 serving as support for the sizing cylinder 45 and of the glue metering roll 49, carriage on which are reported wheels 43.
  • the trolley 51 are housed among other things, the rotary drive mechanisms of the gluing roller 45 and glue dispensing cylinder 49, as well as the bath of glue, in which plunges the roll sizing 45 with the envelope surface 47.
  • the carriage 29 is tucked into the machine frame with the gluing unit and is locked to the machine frame 31 by means of means of attachment 33.
  • an overpressure in order to support the band corrugated 1 arriving from the fluted cylinder 11 against the part of the circumference of the fluted cylinder 13 which is turned to the sizing cylinder 45. It is also possible to suck the corrugated strip 1 against the fluted cylinder 13 by means of a depression.
  • the unit sizing 27 is then brought closer to the grooved cylinder 13 by means of approximation means not shown in Figure 1, but exposed in more detail in connection with Figures 2 and 3, until the surface envelope 47 of the sizing cylinder 45 reaches close pressure contact with the corrugated band 1, plus exactly in pressure contact with the undulations of the corrugated tape 1.
  • the corrugations of the corrugated tape 1 so are not only dipped in the adhesive film applied on the sizing cylinder 45, but they also undergo a pressure constraint.
  • Load linear applied to the undulations of the corrugated strip is preferably between 0.5 and 3.0 N / mm.
  • the thickness of adhesive film on the sizing cylinder 45 is chosen according to various parameters.
  • the thickness of the adhesive film is preferably comprised between 0.1 mm and 0.6 mm, the speed of the machine exercising an influence on the choice of film thickness of adhesive in the sense that for a more machine speed high, one generally chooses a smaller thickness of adhesive film.
  • the dependence of the film thickness of adhesive depending on the speed of the machine can be tabulated in advance and is stored in a control unit. According to these tables, the slot of dosing between the sizing cylinder 45 and the cylinder glue dispenser 49 is then set to obtain the adhesive film thickness adapted to the speed of the machine.
  • FIG. 2 shows schematically a first example embodiment of the machine of Figure 1.
  • a piston and cylinder unit 53 with hydraulic control, which seizes on the one hand the carriage 29 locked fixedly to the machine frame 31 of the machine, and seize other part of the trolley 51 of the sizing unit 27.
  • the unit piston and cylinder 53 comprises a cylinder 55 placed on the carriage 29, wherein a piston 57 is movably mounted.
  • the piston 57 defines in the cylinder a working chamber 59 and is connected on its opposite side to the working chamber 59 to a piston rod 61 which exits the cylinder 55 in direction from the outside and grabbed the 51 cart from the sizing unit 27 with force transmission.
  • a pipe hydraulic 63 To the working chamber 59 is connected a pipe hydraulic 63. From a source of hydraulic pressure 65, the working chamber 59 of the piston unit and cylinder 53 is fed through the pipe hydraulic 63 in hydraulic pressure. In driving hydraulic 63 is contained a valve 67 regulating pressure. This pressure regulating valve 67 delivers a constant pressure, so that possible pressure fluctuations on the source side of hydraulic pressure 65 can not be transmitted to the working chamber 59 of the piston and cylinder unit 53.
  • the hydraulic pressure source 65 can be formed for example by a hydraulic pump. Pressure delivered by the pressure regulating valve 67 is adjustable. For this purpose, a control line 71 connected to a control unit 69 is connected to the valve of pressure regulation 67.
  • the chamber 59 of the piston and cylinder unit 53 is set under pressure, so that the piston 57 with the rod of piston 61 is pushed back and the carriage 51 of the unit sizing 27 is moved towards the cylinder groove 13.
  • the sizing cylinder 45 is then placed in pressure contact with the corrugated band 1 resting on the fluted cylinder 13.
  • the working chamber 59 is exposed to pressure such as the active support force desired between the sizing cylinder 45 and the cylinder fluted 13 is established.
  • a dynamometric sensor is provided, which is placed on the channel of force transmission of the force produced by the piston and cylinder unit 53.
  • the measurement signal delivered by the dynamometric sensor 75 is transmitted by a measuring signal line 77 to the control unit 69, where it is operated and where a tuning signal is possibly produced, which is sent by the conduct of command 71 to the pressure regulating valve 67 so to modify the pressure in the working chamber 59 and, therefore, the bearing force between the sizing cylinder 45 and the corrugated cylinder 13.
  • the control unit 69 can contain a microprocessor that, depending on the strength measured by the load cell 75, executes a regulation program to adjust the support force measured at a desired reference restoring force.
  • the force produced by the piston and cylinder unit 53 is adjusted within a certain range. On the one hand, she must be large enough to overcome the rolling friction of the wheels 43 during the approach of the sizing unit 27. On the other hand, it should not be too big, to avoid coupling oscillatory between the sizing unit 27 and the cylinder 13. It turned out that when one respects conditions, it did not appear to be oscillation of the width of the formed gluing gap between the sizing cylinder 45 and the grooved cylinder 13. Especially when the mass of the carriage 51 is very large (for example of the order of magnitude of a ton) and the force produced by the piston and cylinder unit 53 is relatively low, there is a decoupling virtually perfect oscillatory between the unit of sizing 27 and the corrugated roll 13.
  • the force produced by the unit piston and cylinder 53a is distributed essentially on two channels of force transmission.
  • a first way of transmission of force passes, as in the example of embodiment of Figure 2, by the sizing cylinder 45a towards the fluted cylinder 13a and from there to chassis of the machine. On this route of transmission force is transmitted a force that corresponds to the force of support between the gluing cylinder 45a and the cylinder fluted 13a.
  • a second way of force transmission extends from the piston unit and cylinder 53a through the carriage 51a and a stop 79a attached to the carriage 51a in the direction of a counter-stop 81a cooperating with the stop 79a of the carriage and fixed relative to the frame 31a of machine, then from there into the machine frame 31a.
  • the counter-stop 81a is adjustable. In the example of embodiment of Figure 3, it is represented by a eccentric which is adjustable by means of a pivoting lever 83a.
  • the pivoting lever 83a is threadedly engaged with a adjustment pin 85a, which can be driven by a electric motor 87a.
  • the electric motor 87a is connected on its side by another control line 89a to the control unit 69a and can be controlled by the unit 69a so that a rotation of the adjustment pin 85a causes a pivoting of the lever 83a and, thus, a displacement of the eccentric 81a.
  • the stop 79a fixed on the carriage 51a is housed another dynamometric sensor 91a, which measures the transmitted force on the second channel of force transmission.
  • the signal measuring force delivered by the dynamometric sensor 91a is sent to the control unit 69a through another measurement signal line 93a.
  • active support between the sizing cylinder 45a and the fluted cylinder 13a is determined by calculating the difference between the value of the force measured by the Dynamometer sensor 75a, which indicates the total force provided by the piston and cylinder unit 53a, and the force measurement value delivered by the sensor dynamometer 91a, which is a measure of the transmitted on the second channel of force transmission.
  • This difference is made by the control unit 69.
  • the support force thus determined is compared to a predetermined setpoint of the support force. Yes the result of the comparison shows a gap, a control signal is delivered to the electric motor 87, which causes a corresponding movement of the eccentric 81, until the difference is removed.
  • the ratio of forces transmitted both channels of force transmission can be modified.
  • the active support force between the gluing cylinder 45a and the fluted cylinder 13a can be varied, for a identical force provided by the piston unit and cylinder 53a.
  • the force transmitted on the second path of force transmission is great compared to the force of active support transmitted on the first path of transmission of force.
  • the carriage 51a is therefore pressed with a large excess force against counter-stop 81a.

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  • Engineering & Computer Science (AREA)
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  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
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Claims (25)

  1. Vorrichtung zur Herstellung einer Verbundschichtbahn (5), welche mindestens eine Wellbahn (1) und mindestens eine mit Wellenkuppen der Wellbahn (1) verklebte Flachbahn (3) aufweist, umfassend:
    mindestens eine der Formgebung und/oder der Formerhaltung der Wellbahn (1) dienende Riffelwalze (13), welche im Betrieb auf einem Teilbereich ihres Umfangs mit der Wellbahn (1) belegt ist, und
    ein Beleimungsaggregat (27) zum Auftragen eines der Verbindung der Wellbahn (1) mit der Flachbahn (3) dienenden, flüssigen Klebstoffs, wobei das Beleimungsaggregat (27) eine auf ihrer Mantelfläche (47) mit einem Klebstofffilm fortlaufend beschichtete, zu der Riffelwalze (13) im wesentlichen achsparallele Beleimungswalze (45) aufweist, welche mit einer der Umfangsgeschwindigkeit der Riffelwalze (13) annähernd gleichen Umfangsgeschwindigkeit angetrieben ist und mit ihrer Mantelfläche (47) gegen den mit der Wellbahn (1) belegten Umfangsteilbereich der Riffelwalze (13) unter Bildung eines Beleimungsspalts in einen die Klebstoffübertragung auf die Wellenkuppen der Wellbahn (1) bewirkenden Annäherungszustand durch Annäherungsmittel (53, 65, 67, 69) annäherbar ist,
    dadurch gekennzeichnet, dass die Annäherungsmittel (53, 65, 67, 69) zum Andrücken der Beleimungswalze (45) gegen die Wellbahn (1) und der Wellbahn (1) gegen die Riffelwalze (13) ausgebildet sind, wobei die Annäherungsmittel (53, 65, 67, 69) Einstellmittel (67, 69) zum Einstellen einer vorbestimmten Andrückkraft zwischen der Beleimungswalze (45) und der Riffelwalze (13) umfassen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Annäherungsmittel (53, 65, 67, 69) Regelmittel (67, 69) zur geregelten Aufrechterhaltung einer vorbestimmten Andrückkraft zwischen der Beleimungswalze (45) und der Riffelwalze (13) umfassen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Annäherungsmittel (53, 65, 67, 69) dazu ausgebildet sind, die Beleimungswalze (45) mit einer maximalen Linienpressung zwischen 0,1 N/mm und 10,0 N/mm, vorzugsweise zwischen 0,3 N/mm und 5,0 N/mm, höchstvorzugsweise zwischen 0,5 N/mm und 3,0 N/mm, gegen die Riffelwalze (13) anzudrücken.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die im Beleimungsspalt wirksame Andrückkraft zwischen der Riffelwalze (13) und der Beleimungswalze (45) und/oder das Schwingungsverhalten der Spaltweite des Beleimungsspalts zwischen der Riffelwalze (13) und der Beleimungswalze (45) nach Maßgabe von Produkteigenschaften eines zuvor beleimten Zwischen- oder Endprodukts (5) eingestellt oder einstellbar sind, gewünschtenfalls in Abstimmung mit anderen, die Produkteigenschaften beeinflussenden Parametern, wie beispielsweise der Dicke des Klebstofffilms, der Viskosität des Klebstoffs, den Klebeeigenschaften des Klebstoffs, den Materialeigenschaften der Wellbahn (1), insbesondere der Saugfähigkeit der Wellbahn (1), den Benetzungsverhältnissen zwischen der Wellbahn (1) und dem Klebstoff und den Umfangsgeschwindigkeiten der Riffelwalze (13) und der Beleimungswalze (45).
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass alsBeurteilungskriterium für die Produkteigenschaften eine Beleimungsbild im Wellenkuppenbereich der Wellbahn (1) dient, vorzugsweise eine Serie von Beleimungsbildem in aufeinanderfolgenden Wellenkuppenbereichen.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Beleimungsbild durch optische Beobachtung, insbesondere nach vorangehender Anfärbung, feststellbar ist.
  7. Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Schwingungsverhalten der Beleimungsspalt-Weite durch Beeinflussung der an der Bildung des Beleimungsspalts mittelbar oder unmittelbar beteiligten Komponenten (zumindest 13, 45, 51, 43) hinsichtlich ihrer Masse und/oder ihrer Lagerdämpfung und/oder ihrer inneren Dämpfung und/oder ihrer Elastizität und/oder der Steifigkeit ihrer gegenseitigen, mechanischen Koppelung eingestellt oder einstellbar ist.
  8. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass eine Resonanzfrequenz oder Resonanzfrequenzen im Schwingungsverhalten der Beleimungsspalt-Weite außerhalb von durch die Drehzahl der Riffelwalze (13) und der Beleimungswalze (45) und/oder durch die Teilung der Riffelung der Riffelwalze (13) bedingten Anregungsfrequenzen liegen.
  9. Vorrichtung nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass das Schwingungsverhalten der Beleimungsspalt-Weite derart gewählt ist, dass in aufeinanderfolgenden Wellenkuppenbereichen annähernd gleiche Beleimungsbilder erzielt werden.
  10. Vorrichtung nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass zur Einstellung des Schwingungsverhaltens der Beleimungsspalt-Weite geeignete Maßnahmen im wesentlichen im Bereich des Beleimungsaggregats (27) oder/und der Annäherungsmittel (53, 65, 67, 69) oder/und von Führungsmitteln (41) für das Beleimungsaggregat (27) vorgesehen sind.
  11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Beleimungswalze (45) an einem gegenüber der Riffelwalze (13) durch Führungsmittel (41) verlagerbar geführten Beleimungswalzenträger (51) angeordnet ist und die Annäherungsmittel (53, 65, 67, 69) mindestens ein an dem Beleimungswalzenträger (51) angreifendes Krafterzeugungsmittel (53) zur Einleitung einer Kraft in den Beleimungswalzenträger (51) umfassen.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass die Führungsmittel (41) eine Geradführung für den Beleimungswalzenträger (51) bilden.
  13. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die durch das mindestens eine Krafterzeugungsmittel (53) zur Verfügung gestellte Kraft im wesentlichen vollständig zur Erzeugung einer Andrückkraft zwischen der Beleimungswalze (45) und der Riffelwalze (13) dient.
  14. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die durch das mindestens eine Krafterzeugungsmittel (53a) zur Verfügung gestellte Kraft verzweigt ist in einen ersten, eine Andrückkraft zwischen der Beleimungswalze (45a) und der Riffelwalze (13a) übertragenden Kraftübertragungsweg (53a, 51a, 45a, 13a, 31a) und in mindestens einen weiteren Kraftübertragungsweg (53a, 51a, 79a, 81a, 31a).
  15. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, dass der mindestens eine weitere Kraftübertragungsweg (53a, 51a, 79a, 81a, 31a) Anschlagmittel (79a, 81a) enthält.
  16. Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, dass die Anschlagmittel (79a, 81a) mindestens einen Anschlag (79a) umfassen, welcher zur gemeinsamen Bewegung mit der Beleimungswalze (45a) längs deren Annäherungsweg an die Riffelwalze (13a) angeordnet ist, und weiterhin mindestens einen Gegenanschlag (81a) umfassen, welcher zur Drehachse der Riffelwalze (13a) ortsfest ist.
  17. Vorrichtung nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass das Verhältnis der über die verschiedenen Kraftübertragungswege (53a, 51a, 45a, 13a, 31a und 53a, 51a, 79a, 81a, 31a) übertragenen Kräfte veränderbar ist.
  18. Vorrichtung nach Anspruch 17, dadurch gekennzeichnet, dass das Verhältnis der Kräfte in den verschiedenen Kraftübertragungswegen (53a, 51a, 45a, 13a, 31a und 53a, 51a, 79a, 81a, 31a) durch Verstellen mindestens einer (81a) der aus Anschlag (79a) und Gegenanschlag (8 1 a) bestehenden Komponenten veränderbar ist.
  19. Vorrichtung nach einem der Ansprüche 15 bis 19, dadurch gekennzeichnet, dass die in dem ersten Kraftübertragungsweg (53a, 51a, 45a, 13a, 31a) übertragene Kraft klein ist im Verhältnis zu der durch das mindestens eine Krafterzeugungsmittel (53a) zur Verfugung gestellten Kraft.
  20. Vorrichtung nach einem der Ansprüche 1 bis 19, gekennzeichnet durch Messmittel (75a, 91a) zur Ermittlung einer Andrückkraft zwischen der Beleimungswalze (45a) und der Riffelwalze (13a).
  21. Vorrichtung nach Anspruch 20, dadurch gekennzeichnet, dass die Messmittel (75a, 91a) mit den Einstellmitteln (67a, 69a) und/oder den Regelmitteln (67a, 69a) eine Regelschleife zur geregelten Aufrechterhaltung eines vorbestimmten Werts der Andrückkraft oder eines vorbestimmten Verlaufs der Andrückkraft in Abhängigkeit von der Zeit oder dem Annäherungsweg bilden.
  22. Vorrichtung nach Anspruch 20 oder 21, dadurch gekennzeichnet, dass die Messmittel (75a, 91a) zur Messung der durch das mindestens eine Krafterzeugungsmittel (53a) zur Verfügung gestellten Kraft ausgebildet sind.
  23. Vorrichtung nach einem der Ansprüche 20 bis 22 in Verbindung mit einem der Ansprüche 14 bis 19, dadurch gekennzeichnet, dass die Messmittel (75a, 91a) zur Messung der in dem mindestens einen weiteren Kraftübertragungsweg (53a, 51a, 79a, 81a, 31a) übertragenen Kraft ausgebildet sind.
  24. Vorrichtung nach einem der Ansprüche 11 bis 23, dadurch gekennzeichnet, dass das Krafterzeugungsmittel (53) als hydraulisch betätigbares Kolben-Zylinder-Aggregat ausgebildet ist.
  25. Vorrichtung nach einem der Ansprüche 1 bis 24, dadurch gekennzeichnet, dass die Umfangsgeschwindigkeit der Beleimungswalze (45) kleiner als die Umfangsgeschwindigkeit der Riffelwalze (13) ist, wobei die Umfangsgeschwindigkeit der Beleimungswalze (45) vorzugsweise mindestens 95 %, höchstvorzugsweise etwa 98 % der Umfangsgeschwindigkeit der Riffelwalze (13) beträgt.
EP98106093A 1997-04-11 1998-04-03 Vorrichtung zum Herstellen einer beschichteten Materialbahn Expired - Lifetime EP0870598B1 (de)

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US20010047850A1 (en) 2001-12-06
DE19715174B4 (de) 2006-11-09
US6409857B2 (en) 2002-06-25
DE19715174A1 (de) 1998-10-15

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