EP1362691A2 - Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre ondulé pour une machine pour la fabrication de papier ondulé - Google Patents

Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre ondulé pour une machine pour la fabrication de papier ondulé Download PDF

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Publication number
EP1362691A2
EP1362691A2 EP02425748A EP02425748A EP1362691A2 EP 1362691 A2 EP1362691 A2 EP 1362691A2 EP 02425748 A EP02425748 A EP 02425748A EP 02425748 A EP02425748 A EP 02425748A EP 1362691 A2 EP1362691 A2 EP 1362691A2
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EP
European Patent Office
Prior art keywords
corrugating roller
gluing cylinder
gluing
cylinder
corrugating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02425748A
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German (de)
English (en)
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EP1362691A3 (fr
EP1362691B1 (fr
Inventor
Mauro Adami
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.)
Fosber SpA
Original Assignee
Fosber SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP02425306A external-priority patent/EP1362690A1/fr
Application filed by Fosber SpA filed Critical Fosber SpA
Priority to EP20020425748 priority Critical patent/EP1362691B1/fr
Publication of EP1362691A2 publication Critical patent/EP1362691A2/fr
Publication of EP1362691A3 publication Critical patent/EP1362691A3/fr
Application granted granted Critical
Publication of EP1362691B1 publication Critical patent/EP1362691B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2863—Corrugating cylinders; Supporting or positioning means therefor; Drives 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
    • B31F1/2818—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

Definitions

  • the present invention relates to a machine for the production of corrugated cardboard and, more in particular, to an improvement of the control system for controlling the distance between the gluing cylinder and the main corrugating roller, over which is run the web-like material, which it is to receive the glue delivered by the gluing cylinder on the crests formed by the two corrugating rollers.
  • Plants for the production of corrugated cardboard comprise a series of machines or workstations, among which one or more machines, referred to in the art as "single facers", which comprise a pair of corrugating rollers that co-operate with one another, each of which presents ribs and grooves that mesh together, whilst a web-like material, namely a sheet or web of paper or cardboard, passes through the gap between the two rollers, so that said web-like material undergoes corrugation.
  • single facers which comprise a pair of corrugating rollers that co-operate with one another, each of which presents ribs and grooves that mesh together, whilst a web-like material, namely a sheet or web of paper or cardboard, passes through the gap between the two rollers, so that said web-like material undergoes corrugation.
  • the web-like corrugated material remains adherent to the first corrugating roller and passes in front of a gluing cylinder, which applies an adhesive on the crests of the corrugations formed on the web-like material itself. Downstream of the gluing area, on the crests of the corrugated material, moistened with glue, there is applied a second smooth web-like material, for instance, a sheet of paper or cardboard, which forms the so-called "cover" of the corrugated cardboard. A second cover is then applied on the opposite face of the corrugated web-like material in a machine set downstream.
  • One of the critical aspects of single facers consists in controlling the relative position between the first corrugating roller, over which the web-like material that is to undergo corrugation is run, and the gluing cylinder.
  • the distance between the surface of the gluing cylinder and the surface to be glued must be controlled in such a way as to guarantee a uniform application of the glue on all the crests and on all the transverse length of the web-like material, i.e., on all the length of each crest.
  • the surface of the gluing cylinder does not touch the material; instead, a very small distance is left between them, of the order of magnitude of the thickness of the film of glue which coats the active surface of the gluing cylinder.
  • the control of the relative position between the corrugating roller (or, more precisely, between the corrugated paper material lying on the roller itself) and the gluing cylinder is a critical aspect of the production cycle of corrugated cardboard, in so far as it is upon the correct control of this parameter that the quality of gluing between the corrugated sheet of cardboard and the smooth sheet of cardboard, i.e., the so-called cover, depends.
  • An other than accurate control entails a non-uniform distribution of adhesive and hence the risk that the two sheets, the smooth one and the corrugated one, will remain not accurately glued to one another.
  • the set comprising the first corrugating roller and the second corrugating roller can be replaced at every order change, when the shape and size of the corrugation on the cardboard varies from one order to the next. Insertion into the machine of a so-called "cartridge", i.e., of the set of the two corrugating rollers, entails the need for an adjustment of the position of the gluing cylinder with respect to the first corrugating roller.
  • Another factor that must be taken into account for achieving proper gluing is the possible fluctuation in the thickness of the web-like paper material fed into the machine. This thickness may vary, for example, when the reel from which the material is fed towards the single facer is replaced. Even very small variations in the thickness of the paper may lead to substantial variations in the application of the glue on the web-like material.
  • EP-B-0601528 a single-facer machine of the above-mentioned type is described, in which a special sensor continuously detects the relative distance between the gluing cylinder and the first corrugating roller.
  • the gluing assembly of which the gluing cylinder forms part is provided with a contrast, which co-operates with a fixed part of the frame of the machine.
  • the contrast can be lengthened or shortened by means of a special actuator, in such a way as to modify the effective distance between the gluing cylinder and the corrugating roller and to maintain this distance constantly equal to a desired value.
  • the system is particularly complex and does not guarantee a sufficient reliability in the positioning between the gluing cylinder and the corrugating roller.
  • the senor is set in a critical area of the machine and is subject to high thermal stresses, as well as being affected by the vibrations of the device. Furthermore, the system does not take into account the wear of the corrugating roller and any differential thermal expansion due to the fact that the roller itself is subject to different temperatures in the various areas thereof.
  • the glue tends to be pushed away from the tops of the crests and to be distributed over the sides of the crests, where it does not contribute to the subsequent gluing of the cover.
  • the forced contact between the gluing cylinder and the corrugating roller leads to the generation of major vibrations and a high wear of the machine members.
  • the relative position between the gluing cylinder and the corrugating roller is controlled by pressing the end supports of the gluing cylinder against the end supports of the corrugating roller and by measuring the force of contact. Moreover provided is a mechanism which makes it possible to increase or reduce the distance between these supports until a desired contact force is achieved. Corresponding to this is a very precise relative position between the active surface of the gluing cylinder and the web-like corrugated paper material that is run over the corrugating roller. This system proves very complex on account of the need to have available a plurality of actuators. A particularly critical and complex aspect is the mechanism for adjusting the distance between the end supports of the gluing cylinder and those of the corrugating roller.
  • EP-B-0786329 there are described single facers with systems for controlling the distance between the gluing cylinder and the corrugating roller, said systems being based upon detection of an operating parameter.
  • This parameter may be vibration, noise, the torque applied to the gluing cylinder, or the force of reaction between the gluing cylinder and the corrugating roller.
  • the measurements thus made are all affected by error, in so far as, whatever the parameter considered, it is influenced not only by the distance between the gluing cylinder and the corrugating roller, but also by external factors which have nothing to do with said distance.
  • the control is, therefore, far from accurate and is rendered complex by the need to use particularly delicate sensors.
  • EP-A-0734849 describes a single facer in which the distance between the corrugating roller and the gluing cylinder is controlled by detecting speed.
  • a first detection means reads the peripheral speed of the corrugating roller and a second means reads the peripheral speed of the gluing cylinder.
  • the detecting means are associated to motors which drive the corrugating roller and the gluing cylinder respectively.
  • Gluing cylinder rotation is kept at certain value so that the peripheral speed of the gluing cylinder is different from the peripheral speed of the corrugating roller.
  • the distance between the corrugating roller and the gluing cylinder is adjusted by gradually approaching the gluing cylinder to the corrugating roller until a variation of the rotation speed of the gluing cylinder (caused by the contact of the cylinder with the cardboard running over the corrugating roller) is detected.
  • the distance between the two elements is fixed at this point.
  • the system is not very efficient because the friction generated by effect of the contact of the paper running over the corrugating roller and the gluing cylinder is not sufficient to provide angular acceleration to the gluing cylinder and the associated drive. However, acceleration occurs only after the gluing cylinder is moved excessively close to the corrugating roller and pressed onto the cardboard with considerable force.
  • the device described in EP-A-734849 does not envisage the possibility of adapting the distance between the gluing cylinder and the corrugating roller while processing a single job, i.e. during the production of a certain type of material.
  • the distance is adapted only when the job is changed. Consequently, the device does not account for: (a) roller diameter variations caused by temperature oscillations during the process deriving also from variations in speed; (b) variations of thickness of each sheet of cardboard from the same reel due to, for example, slight oscillations in cardboard sheet production parameters.
  • An object of the present invention is to provide a machine for the production of corrugated cardboard, or so-called “single facer”, in which it is possible to control, in a reliable, accurate and simple way, the position of the cylinder with respect to the corrugating roller with which the cylinder co-operates.
  • An object of the present invention is also to provide a method for controlling the operating condition of the gluing cylinder with respect to the corrugating roller.
  • the parameter used to adjust the relative distance between corrugating roller and gluing cylinder is a modification in the relative angular position between the gluing cylinder and a member for transmitting motion to said gluing cylinder, for example a wheel, such as a gear wheel or a pulley.
  • a wheel such as a gear wheel or a pulley.
  • An extremely low inertia system is obtained as a result.
  • the angular position of the gluing cylinder with respect to the respective motion transmission means changes rapidly, as soon as a frictional force is applied to the cylinder by the web-like material running over the crests of the corrugating roller. This ensures very accurate regulation of the distance between the corrugating roller and the gluing cylinder.
  • the gluing assembly is mounted in such a way that it can move with respect to the first corrugating roller, the position of the gluing assembly being modified according to the variation in the angular position of the gluing cylinder with respect to a member for transmitting motion to the cylinder.
  • the gluing cylinder is driven in rotation with a peripheral speed lower than the peripheral speed of the sheet of web-like material run over the first corrugating roller, for example, 0.5%-10% lower, and preferably 1%-5% lower.
  • a peripheral speed lower than the peripheral speed of the sheet of web-like material run over the first corrugating roller for example, 0.5%-10% lower, and preferably 1%-5% lower.
  • the motion transmission means comprise a wheel which is coaxial to the gluing cylinder, connected thereto in such a way as to be able to perform a limited angular movement with respect to the gluing cylinder, and which is driven by a transmission member, e.g. a flexible belt or chain member.
  • a sensing means is provided to detect the angular displacement between the gluing cylinder and the wheel.
  • the gluing cylinder may assume a displaced angular position, with respect to the mechanical transmission that turns it.
  • the displacement is detected, for example, by a load cell, or other sensor, suitably arranged between a support of the gluing cylinder and its respective axis.
  • limiting means are provided to limit the angular displacement between said wheel and the gluing cylinder.
  • the detector comprises a mobile member, e.g. pivoting, cooperating with a cam, the relative position of said mobile member and said cam being determined by the angular position of said wheel and said gluing cylinder.
  • a sensor means e.g. a microswitch, a capacitive sensor, a magnetic sensor or other
  • the cam is provided to detect the movement of the mobile member controlled by the cam.
  • the cylinder works as a switch which is operated as a consequence of the frictional force applied to the cylinder by the corrugating roller or more precisely by the web-like material running over the roller.
  • a method for controlling the distance between a gluing cylinder and a first corrugating roller in a machine for producing corrugated cardboard which comprises said gluing cylinder, said first corrugating roller and a second corrugating roller, which cooperates with the first corrugating roller to corrugate a sheet of web-like material, upon which said gluing cylinder applies a glue.
  • the corrugating roller and the gluing cylinder are turned at reciprocally different peripheral speeds.
  • the adjusting method according to the invention is characterized in that the reciprocal position of the corrugating roller and the gluing cylinder is adjusted by gradually approaching the gluing cylinder and the corrugating roller until an angular shift or displacement between the gluing cylinder and a motion transmitting means of the cylinder is caused by the frictional force transmitted by the web-like material running over the corrugating roller.
  • the angular displacement is used as a signal to set the reciprocal distance between the gluing cylinder and the corrugating roller.
  • Figure 1 illustrates the machine with the gluing assembly in the working position, with the gluing cylinder in contact with the web-like material run over the first corrugating roller
  • Figure 2 illustrates the same machine with the gluing assembly in the opened condition, i.e., with the machine pre-arranged so as to enable replacement of the set or cartridge of corrugating rollers, for instance, when there is a change of production order.
  • the machine designated as a whole by 1, has a load-bearing structure 3, on which an assembly 5 is fitted, the said assembly comprising a first corrugating roller 7 and a second corrugating roller 9.
  • the two corrugating rollers 7 and 9 are mounted on a unit or cartridge 11, which can be inserted into and removed from the machine for replacement of the corrugating rollers themselves with others having a different configuration of the ribs that have the function of corrugating the web-like material that is fed into the machine.
  • the corrugating roller 7 has a plurality of ribs or undulations 7C on its own cylindrical surface, with which corresponding undulations or ribs 9C of the second corrugating roller 9 mesh.
  • a web-like material N is made to pass, for example a sheet of paper or cardboard, which undergoes corrugation between the two rollers 7 and 9, said web-like material N remaining adherent, at output from the gap between the said rollers, to the first corrugating roller 7, for instance, by means of a suction system or a pressurized-air system of a type in itself known.
  • the first corrugating roller 7 turns about an axis 7A in the direction indicated by the arrow f7, the axis 7A being substantially fixed with respect to the unit 11, which supports the rollers 7 and 9.
  • the second corrugating roller 9 is supported by a pair of arms 13, which are hinged about an axis of oscillation 15, parallel to the axis 7A of the first corrugating roller 7 and to the axis 9A, about which the second corrugating roller 9 turns in the direction indicated by the arrow f9.
  • the second corrugating roller 9 is forced against the first corrugating roller 7 by means of a pair of actuators (a pair of so called torpresses, in the example illustrated), designated by 17, which act upon the two end arms 13 that support the axis 9A of the corrugating roller 9.
  • the position of the arms 13, and hence of the second corrugating roller 9 with respect to the unit 11, and hence with respect to the structure 3 of the machine 1, is detected by means of a sensor designated by 19, said sensor being interfaced with a control unit 21, for the purposes specified hereinafter. Said sensor could be omitted in certain embodiments of the machine and in certain implementations of the control method.
  • the corrugating roller 9 may be made with a diameter that is even much smaller (as compared to the one represented in the figure) than the diameter of the corrugating roller 7. This reduces the number of ribs 7C, 9C meshing together in the area of co-operation between the two corrugating rollers, and consequently facilitates the formation of the corrugation on the web-like material N, as is known to persons skilled in the art. in order to overcome the excessive flexibility of the corrugating roller 9 when this has a particularly small diameter, it may be envisaged that it is supported in an intermediate position between the arms 13 by one or more supporting belts carried by the unit 11, which are appropriately run over the bottom portion of the corrugating roller 9.
  • a gluing assembly Constrained to the structure 3 of the machine is a gluing assembly, designated as a whole by 31.
  • the gluing assembly 31 is hinged about an axis of oscillation B parallel to the axes 7A and 9A of the corrugating rollers 7 and 9.
  • the geometrical axis of oscillation B is parallel to a second axis C of an eccentric cam 33.
  • the angular position of the eccentric cam 33 may be modified by means of an actuator, for instance a stepper motor reducer 35.
  • the rotation of the eccentric cam 33 about the axis C brings about a modification in the position of the geometrical axis B of oscillation of the gluing assembly 31 for the purposes described hereinafter.
  • the gluing assembly 31 carries a glue tank 37, from which the glue is taken by means of a transferor cylinder 39, which turns in the direction indicated by the arrow f39.
  • the transferor cylinder 39 is tangential to a gluing cylinder 41, which turns in the direction indicated by the arrow f41, in the same direction as the transferor cylinder 39 and in contact with the latter.
  • the glue is transferred from the tank 37 onto the cylindrical surface of the gluing cylinder 41, and therefrom to the crests of the web-like material N, which is run over the first corrugating roller 7 and previously deformed in the gap between the corrugating roller 7 and the corrugating roller 9.
  • the working position of the gluing assembly 31 is defined by the position of the axis B and by a pair of eccentric pins 42 carried by the unit 11.
  • the eccentric pins 42 carried by the unit 11 are adjusted to adjust the position of the gluing assembly 31 in such a way that the axis of the gluing cylinder 41 is perfectly parallel to the axis 7A of rotation of the first corrugating roller 7.
  • This adjustment operation is normally carried out just once, when a set of corrugating rollers 7, 9 carried by the unit 11 are inserted into the machine.
  • Oscillation of the gluing assembly 31 about the axis B is controlled by means of a cylinder-piston actuator 47, which is hinged in 49 to the fixed structure 3 of the machine and in 51 to the gluing assembly 31.
  • the positions of working and opening of the gluing assembly 31 are shown in Figures 1 and 2, as mentioned above. In the position illustrated in Figure 2, the gluing assembly 31 has been moved away from the corrugating roller 7 to enable replacement of the unit 11, which carries the corrugating rollers 7 and 9.
  • a pressure roller 55 supported by a pair of arms 56, which are hinged in 59 to the fixed structure 3 and which are forced by actuators 61 so that they press the pressure roller 55 against the corrugating roller 7.
  • a second continuous web-like material for example, a sheet of paper material designated by N2, said material being guided by a cylinder 63.
  • the web-like material N2 is applied by pressure exerted by the roller 55 onto the crests of the web-like material N previously provided with glue by means of the gluing cylinder 41.
  • the second web-like material N2 constitutes the so-called "cover” of the corrugated cardboard produced by the machine.
  • the corrugated cardboard designated by CO, is thus made up of the corrugated web-like material N glued onto the smooth web-like material N2.
  • this material is then sent on to a further machine for application of a second smooth sheet on the opposite face, and is then possibly combined with other sheets of corrugated cardboard.
  • the gluing cylinder 41 is supported on the gluing assembly 31 by means of a pair of bearings 71.
  • a pulley 73 Mounted at one end of the gluing cylinder 41 is a pulley 73, with interposition of a mechanism 75 (described below) which permits a limited angular movement to the pulley 73 on the axis 41A of the cylinder 41 to which the pulley is coaxial.
  • Run over the pulley 73 is a toothed belt 77, which is then run over a further pulley 79, fitted on the axis of the transferor cylinder 39 and run over a motor-driven pulley 81, which receives motion from a motor 83. The latter then drives in rotation the transferor cylinder 39 and the gluing cylinder 41 by means of the belt 77.
  • the peripheral speed of the gluing cylinder 41 applied by the motor 83 is chosen in such a way as to be slightly lower than the peripheral speed of the first corrugating roller 7, and, more precisely, slightly lower than the peripheral speed of the most radially external points (i.e., the crests) of the corrugated web-like material N, which passes between the rollers 7 and 9 and is run over the corrugating roller 7.
  • the difference in peripheral speed may be in the range of 0.5% to 10%, and preferably between 1% and 5%.
  • a wheel 101 (also see Figure 5) is fitted on the shaft 42 ( Figures 3 and 4), integral with the gluing cylinder 41 and supported in the bearing 71; a radial spline 103 is integral with the wheel.
  • the spline 103 is arranged in a tangential housing 105 delimited by two contrasts 107A, 107B in the body of the pulley 73.
  • the two contrasts 107A and 107B are reciprocally distanced by an angle comprised, for example, in the range from approximately 5° to approximately 25°, for example approximately 15°.
  • the toothed pulley 73 (on which the belt 77 runs) can oscillate on the axis 41A with respect to the gluing cylinder 41 by an angle corresponding to that defined by the two contrasts 107A, 107B.
  • a cam profile 109 is formed on the front surface of the wheel 101 on which a feeler 111 rests, said feeler being formed by an arm hinged on an axis 111A oriented by 90° with respect to the axis 41A of the gluing cylinder 41.
  • the contact between the feeler arm 111 and the cam 109 is ensured by a spring arranged between the feeler arm 111 and a cover 113 fastened on the pulley 73.
  • a cup or plate 115 which can project into a central aperture 117 made in the cover 113, is integral with the feeler arm 111.
  • a microswitch 119 or other sensing means e.g. inductive, capacitive or other, is arranged in front of said aperture and interfaces with the machine control unit.
  • the material of the plate or cup 115 shall be chosen according to the type of sensor employed.
  • the senor shall be capable of detecting whether the plate or cup 115 is in extracted or retracted position with respect to the housing formed by the wheel or pulley 73 and the cover 113.
  • the gluing assembly 31 is brought into the working position (see Figure 1), retracting the actuator 47 until the gluing assembly is brought right up against the eccentric cams 42.
  • the axis of the gluing assembly 41 is brought up parallel with the axis of the corrugating roller 7.
  • the eccentric cam 33 is brought into an angular position such as to bring the gluing cylinder 41 to the maximum distance from the corrugating roller 7.
  • the distance between the active cylindrical surface of the gluing cylinder 41 and the web-like material N run over the corrugating roller 7 is certainly greater than the optimal distance for obtaining perfect gluing.
  • the actuator 35 which turns the eccentric cam 33, is activated, so bringing the axis of oscillation B closer to the vertical plane containing the axis 7A of the corrugating roller 7, whilst the machine is brought up to the operating speed, with the gluing cylinder 41 that turns at a slightly lower speed than that of the web-like material run over the first corrugating roller 7.
  • the cylinder 41 is turned by effect of one of the contrasts 107A, 107B which rests on the spline 103 and draws in rotation the wheel 101, and consequently the shaft 42, with which it is integral; the shaft in turn is integral with the gluing cylinder 41.
  • the plate or cup 115 is in retracted position because in this angular position ( Figure 5) the feeler arm 111 is not in contact with the raised profile of the cam 109.
  • the force of friction that is generated between the web-like material and the gluing cylinder 41 moves the gluing cylinder 41 forward by a few degrees causing a relative angular shift or displacement between the cylinder (and consequently the wheel 101 integral therewith) and the motion transmitting pulley 73.
  • the angular shift or displacement is limited by the other of the two contrasts 107A, 107B against which the radial spline 103 now rests.
  • the reciprocal angular displacement between the wheel 101 and the wheel or pulley 73 is sufficient to move the feeler arm 111 up on the cam profile 109, whereby causing the plate or cup 115 to move outwards.
  • This movement is detected by the microswitch 119 which generates a signal detected by the control unit 21.
  • the angular displacement between gluing cylinder 41 and wheel or pulley 73 is determined by the fact that the web-like material advances at a different speed (higher in this case) than that of the peripheral speed of the gluing cylinder 41 moved by its respective drive. Consequently, the web-like material N starts to exert on the gluing cylinder 41 a frictional force and hence an effect of drawing even prior to contact between the web-like material itself and the active surface of the cylinder on account of the presence of the film of glue on the cylinder itself.
  • the gluing cylinder 41 is free to be angularly displaced by a certain extent (defined by the distance between the contrasts 107A and 107B) with respect to the pulley 73 thanks to the spline 103 and to the two contrasts 107A, 107B, the effect of this frictional force will be to cause the angular displacement of the cylinder 41 with respect to transmission of motion to the cylinder, with the generation of the signal by the microswitch 119.
  • the distance between the gluing cylinder 41 and the corrugating roller 7 is fixed by arresting rotation of the eccentric cam 33 when microswitch 119 detects the movement of the feeler arm 111 or else, and preferably, the eccentric cam 33 is caused to rotate again in the opposite direction as soon as the microswitch 119 detects the displacement of the feeler arm 111. Displacement in the opposite direction is performed to a certain extent determined by the angle of rotation of the cam 33.
  • the predetermined rotation corresponds to a predetermined distance between the active surface of the gluing cylinder 41 and the surface of the crests of web-like material on the corrugating roller.
  • the angular displacement detected by the microswitch 119 is used to define a zero point from which the machine control system starts to impose to the gluing cylinder a predetermined distance from the corrugated roller, by distancing the gluing cylinder from the corrugating roller by a predetermined extent which can be programmed by the operator.
  • This predetermined distance can be defined according to the production speed of the machine, the characteristics of the material being processed and other parameters.
  • the unit 21, which is interfaced with the microswitch 119 and with the actuator 35, is always able to detect any possible angular displacement of the gluing cylinder 41 with respect to the pulley 73 that is due to the reduction in the distance between the cylinder 41 itself and the corrugated web-like material N.
  • the actuator 35 which moves the gluing assembly 31 and hence the gluing cylinder 41 away from the corrugating roller 7 by the necessary amount, is activated.
  • the control system is programmed to regularly and gradually approach the gluing cylinder 41 to the corrugating roller 7 and consequently distance the two elements by a predetermined extent starting from the zero position defined by detecting the angular displacement between the gluing cylinder 41 and the pulley 73. In this way, the correct reciprocal distance between the roller 7 and the cylinder 41 is regularly restored without ever being excessively close due to the accidental dilatation of the corrugating roller 7. Similarly, excessive distance between the corrugating roller 7 and the gluing cylinder 41 is avoided due to the reduction in diameter of the roller 7 consequent to cooling.
  • the frequency according to which the reciprocal distance between corrugating roller 7 and gluing cylinder 41 is restored can be determined also according to the production speed or other advantageous considerations.
  • This mode of operation accounts for possible variation in diameter of the corrugating roller due to temperature variations as well as possible oscillations in paper thickness.
  • a load cell or other equivalent sensor can be fitted on either one or both contrasts 107A, 107B to detect the movement of the spline 103 instead of the microswitch 119 and the respective members which are employed to detect the angular movement of the cylinder 41 with respect to the pulley 73.
  • the solution described above presents the advantage of not requiring wiring inside the pulley 73.
  • the position of the arms 13, and hence of the second corrugating roller 9 with respect to the axis of rotation 7A of the first corrugating roller 7, depends upon the diameter of the corrugating roller 7 itself, upon the diameter of the corrugating roller 9, and upon the thickness of the web-like material N passing between the two corrugating rollers.
  • the position read by the sensor 19 is a function of the variation in diameter of the corrugating roller 7 and of the variation in the thickness of the web-like material N.
  • This variation is the one that affects the distance between the crests of the corrugation of the web-like material N and the active surface of the gluing cylinder 41. Consequently, the actuator 35, which modifies the position of the axis of oscillation B, and hence of the gluing assembly 31, with respect to the corrugating roller 7 can be interlocked to the signal detected by the sensor 19 through a control made by the control unit 21.
  • An approach of the arm 13 to the sensor 19 indicates an increase in the thickness of the web-like material N and/or an increase in the diameter of the corrugating roller 7, and hence there derives therefrom the need to rotate the eccentric cam 33 by means of the actuator 35 to move the gluing cylinder 41 away from the axis of rotation 7A of the corrugating roller 7.
  • An increase in the distance read by the sensor 19 indicates, instead, a reduction in the thickness of the web-like material and/or a reduction in the diameter of the corrugating roller 7, and hence the consequent need to reduce the distance between the gluing cylinder 41 and the axis 7A of rotation of the corrugating roller 7.
  • the variation in the diameter of the corrugating roller 7, of which account is not taken in the adjustment described above by means of the signal of the sensor 19, is neglected in that the smaller diameter of this roller leads to a smaller variation in its dimensions due to the fluctuation in temperature.
  • the variation in diameter of the corrugating rollers is mainly due to a variation in the thermal flow removed from the web-like material N during operation of the machine. In fact, if the machine increases its speed, the web-like material that is passing through it per unit time increases, and consequently also the heat removed by thermal conduction between the corrugating roller and the web-like material increases.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP20020425748 2002-05-16 2002-12-05 Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre ondulé pour une machine pour la fabrication de papier ondulé Expired - Lifetime EP1362691B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20020425748 EP1362691B1 (fr) 2002-05-16 2002-12-05 Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre ondulé pour une machine pour la fabrication de papier ondulé

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02425306 2002-05-16
EP02425306A EP1362690A1 (fr) 2002-05-16 2002-05-16 Dispositif de régulation d'espacement entre un rouleau encolleur et un rouleau cannelé pour une machine de fabrication de carton ondulé
EP20020425748 EP1362691B1 (fr) 2002-05-16 2002-12-05 Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre ondulé pour une machine pour la fabrication de papier ondulé

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EP1362691A2 true EP1362691A2 (fr) 2003-11-19
EP1362691A3 EP1362691A3 (fr) 2005-04-20
EP1362691B1 EP1362691B1 (fr) 2006-08-23

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010008906A1 (de) 2009-02-24 2010-11-04 FOSBER S.p.A., Monsagrati Anlage zur Herstellung von Wellpappe
DE102010009741A1 (de) 2009-03-04 2011-01-05 FOSBER S.p.A., Monsagrati Anlage zur Herstellung von Wellpappe, Heizkreislauf mit Energierückgewinnung und zugehöriges Verfahren
EP2476547A1 (fr) 2011-01-17 2012-07-18 FOSBER S.p.A. Machine ondulée pour produire un panneau ondulé et procédé associé
EP2484516A1 (fr) 2011-02-02 2012-08-08 FOSBER S.p.A. Dispositif de production de carton ondulé et procédé de récupération de condensats
WO2017036685A1 (fr) 2015-08-31 2017-03-09 Fosber S.P.A. Installation et procédé de production de carton ondulé doté de détecteur de défaut de collage
WO2019048437A1 (fr) 2017-09-07 2019-03-14 Fosber S.P.A. Procédé de diagnostic prédictif pour une installation de production de carton ondulé
EP3599196A1 (fr) 2018-07-27 2020-01-29 Guangdong Fosber Intelligent Equipment Co., Ltd. Dispositif convoyeur pour une bande ondulée, ligne de fabrication de carton ondulé comprenant le dispositif convoyeur et procédé
IT201900004661A1 (it) 2019-03-28 2020-09-28 Fosber Spa Impianto comprendente un ondulatore, e metodo
IT201900011319A1 (it) 2019-07-10 2021-01-10 Fosber Spa Metodo di monitoraggio di un impianto per la produzione di cartone ondulato
IT202200000215A1 (it) 2022-01-10 2023-07-10 Fosber Spa Impianto e metodo per la produzione di cartone ondulato con rilevatore di cambio d’ordine

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US5415720A (en) * 1992-12-11 1995-05-16 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Gluing apparatus for a corrugated board installation
EP0734849A1 (fr) * 1995-03-29 1996-10-02 Mitsubishi Jukogyo Kabushiki Kaisha Procédé et dispositif pour le contrÔle de l'application de colle à carton ondulé
EP0786329A2 (fr) * 1996-01-23 1997-07-30 Mitsubishi Jukogyo Kabushiki Kaisha Procédé et dispositif pour le contrÔle de l'application de colle à carton ondulé
EP1086805A1 (fr) * 1999-09-22 2001-03-28 BHS CORRUGATED MASCHINEN- UND ANLAGENBAU GmbH Machine pour la fabrication du carton ondulé ainsi qu'un méthode de calibration l'emprise d'un dispositif d'encollage utilisé dans une telle machine
US20010047850A1 (en) * 1997-04-11 2001-12-06 Dieter Pallas Device for manufacturing a composite sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415720A (en) * 1992-12-11 1995-05-16 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Gluing apparatus for a corrugated board installation
EP0734849A1 (fr) * 1995-03-29 1996-10-02 Mitsubishi Jukogyo Kabushiki Kaisha Procédé et dispositif pour le contrÔle de l'application de colle à carton ondulé
EP0786329A2 (fr) * 1996-01-23 1997-07-30 Mitsubishi Jukogyo Kabushiki Kaisha Procédé et dispositif pour le contrÔle de l'application de colle à carton ondulé
US20010047850A1 (en) * 1997-04-11 2001-12-06 Dieter Pallas Device for manufacturing a composite sheet
EP1086805A1 (fr) * 1999-09-22 2001-03-28 BHS CORRUGATED MASCHINEN- UND ANLAGENBAU GmbH Machine pour la fabrication du carton ondulé ainsi qu'un méthode de calibration l'emprise d'un dispositif d'encollage utilisé dans une telle machine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010008906A1 (de) 2009-02-24 2010-11-04 FOSBER S.p.A., Monsagrati Anlage zur Herstellung von Wellpappe
DE102010009741A1 (de) 2009-03-04 2011-01-05 FOSBER S.p.A., Monsagrati Anlage zur Herstellung von Wellpappe, Heizkreislauf mit Energierückgewinnung und zugehöriges Verfahren
EP2476547A1 (fr) 2011-01-17 2012-07-18 FOSBER S.p.A. Machine ondulée pour produire un panneau ondulé et procédé associé
US8714223B2 (en) 2011-01-17 2014-05-06 Fosber S.P.A. Corrugating machine for producing corrugated board and related method
EP2484516A1 (fr) 2011-02-02 2012-08-08 FOSBER S.p.A. Dispositif de production de carton ondulé et procédé de récupération de condensats
WO2017036685A1 (fr) 2015-08-31 2017-03-09 Fosber S.P.A. Installation et procédé de production de carton ondulé doté de détecteur de défaut de collage
US10525653B2 (en) 2015-08-31 2020-01-07 Fosber S.P.A. Plant and method for producing corrugated cardboard with gluing defect detector
US11422536B2 (en) 2017-09-07 2022-08-23 Fosber S.P.A. Predictive diagnostics method for a corrugated board production plant
WO2019048437A1 (fr) 2017-09-07 2019-03-14 Fosber S.P.A. Procédé de diagnostic prédictif pour une installation de production de carton ondulé
EP3599196A1 (fr) 2018-07-27 2020-01-29 Guangdong Fosber Intelligent Equipment Co., Ltd. Dispositif convoyeur pour une bande ondulée, ligne de fabrication de carton ondulé comprenant le dispositif convoyeur et procédé
EP3715102A1 (fr) 2019-03-28 2020-09-30 FOSBER S.p.A. Installation comprenant un parement simple et procédé
US11364703B2 (en) 2019-03-28 2022-06-21 Fosber S.P.A. Plant comprising a single facer, and method
IT201900004661A1 (it) 2019-03-28 2020-09-28 Fosber Spa Impianto comprendente un ondulatore, e metodo
IT201900011319A1 (it) 2019-07-10 2021-01-10 Fosber Spa Metodo di monitoraggio di un impianto per la produzione di cartone ondulato
WO2021005123A1 (fr) 2019-07-10 2021-01-14 Fosber S.P.A. Procédé de surveillance d'une installation de production de carton ondulé
IT202200000215A1 (it) 2022-01-10 2023-07-10 Fosber Spa Impianto e metodo per la produzione di cartone ondulato con rilevatore di cambio d’ordine

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EP1362691A3 (fr) 2005-04-20
EP1362691B1 (fr) 2006-08-23

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