EP2792477B1 - Dispositif d'ondulation du matériau pour feuilles de papier - Google Patents

Dispositif d'ondulation du matériau pour feuilles de papier Download PDF

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Publication number
EP2792477B1
EP2792477B1 EP13164474.2A EP13164474A EP2792477B1 EP 2792477 B1 EP2792477 B1 EP 2792477B1 EP 13164474 A EP13164474 A EP 13164474A EP 2792477 B1 EP2792477 B1 EP 2792477B1
Authority
EP
European Patent Office
Prior art keywords
corrugation
sheets
paper material
cylinders
thrust member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13164474.2A
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German (de)
English (en)
Other versions
EP2792477B8 (fr
EP2792477A1 (fr
Inventor
Giuseppe Brivio
Renato Rossi
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.)
Quantum Corrugated SRL
Original Assignee
BP Agnati SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BP Agnati SRL filed Critical BP Agnati SRL
Priority to EP13164474.2A priority Critical patent/EP2792477B8/fr
Priority to ES13164474.2T priority patent/ES2686072T3/es
Publication of EP2792477A1 publication Critical patent/EP2792477A1/fr
Application granted granted Critical
Publication of EP2792477B1 publication Critical patent/EP2792477B1/fr
Publication of EP2792477B8 publication Critical patent/EP2792477B8/fr
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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
    • B31F1/2831—Control
    • 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

Definitions

  • the present invention relates to a corrugation device for sheets of paper material of the type described in the preamble of claim 1.
  • the invention relates to a device in which a sheet of paper material, presenting itself as initially flat, undergoes a plastic deformation suitable for giving it a corrugated profile so as to be used, for example, to make corrugated board.
  • the corrugation devices known in the prior art are composed, mainly, of a calender having two corrugation cylinders shaped in such a way as to plastically deform the sheets and thus give them a corrugated profile.
  • said corrugation cylinders have the outer surface suitably corrugated so as to reciprocally engage and thereby define a work zone through which the sheets pass, undergoing the plastic deformation.
  • the force needed to deform the sheets is applied to the corrugation cylinders by means of thrust devices which act on the ends of said cylinders.
  • the distribution of the force needed, to be applied evenly all over the mechanical clearance of the machine, is performed thanks to the camber of one of the two cylinders, the value of which is calculated to offset the elastic deformation of said corrugation cylinders. It follows that the force for deforming the sheets may be a single value, calculated at the design phase and related to the geometry and elasticity of the corrugation cylinders.
  • US 6,012,501 discloses how a labyrinth path in a corrugating nip of a single facer is substantially reduced by utilizing a small diameter corrugating roll captured between a larger diameter conventional corrugating roll and a backing roll arrangement.
  • the smaller diameter corrugating roll is captured to prevent bending thereof under corrugating loads.
  • US 2003/054136 discloses a corrugator unit, particularly for sheets or webs of paper, or similar, of the type comprising at least two rolls, having a toothed or corrugated surface, and being mutually engaged and pushed against each other by a predetermined pressure or force. The mutual compression between rolls is exerted over the whole axial length of the rolls. This may be obtained through mechanical or magnetic means.
  • US 2003/066590 discloses a corrugator single facer of the type utilizing a large diameter bonding and corrugating roll and a small diameter corrugating roll that is driven without direct drive applied to either corrugating roll.
  • the pressure belt arrangement which supports the lower corrugating roll to provide the nipping force includes a series of driven supporting pressure belts that are loaded against the lower corrugating roll and which transmit rotational movement thereto and through the nip to the large diameter bonding roll.
  • the means for feeding/pressing the flat paper sheet against the corrugated paper sheet on the toothed or corrugated roll consists of a roll which is mounted in such a way as to rotate about its axis and parallel to the toothed or corrugated roll and which is made, at least at its periphery of a layer of natural or synthetic fibers or compacted blends thereof, having a certain compressibility and/or deformability.
  • a first significant drawback is represented by the limited adaptability of the corrugation devices to sheets of varying thicknesses and/or made of different materials.
  • the corrugation cylinders discharge a force onto the sheets not suitable to plastically deform them.
  • the force applied by the cylinders proves insufficient for their plastic deformation and consequently an elastic deformation occurs which is practically immediately reabsorbed, once the force of the cylinders is removed.
  • the force applied causes the tearing of the sheets determining a reduction in quality of the board produced and, in some cases, a halt to production with relative increase in costs.
  • the technical purpose of the present invention is to develop a corrugation device for sheets of paper material able to substantially overcome the inconveniences mentioned above.
  • one important aim of the invention is to develop a device which is able to optimally process even sheets having different characteristics from those planned for without replacing rollers, corrugation cylinders or the like.
  • Another important aim of the invention is therefore to obtain a device able to perform the correct plastic deformation of any type of sheet.
  • reference numeral 1 globally denotes the corrugation device for sheets in paper material 1.
  • a frame able to contain within it the various components, a calender 20, including two corrugation cylinders, including of different diameters, suitable to exert a deformation force on the sheet of paper material 10, and at least one thrust member 30 able to vary the deformation force exerted by the corrugation cylinders on the sheet 10.
  • the calender 20 comprises two cylinders preferably at least partially hollow so as to allow an internal passage of a hot fluid (air and/or steam and/or heat-transmitting oil), with lightening apertures.
  • a hot fluid air and/or steam and/or heat-transmitting oil
  • it includes a first corrugation cylinder 21 along which the sheet of paper material 10 slides during processing and a second corrugation cylinder 22 suitable to engage with the first corrugation cylinder 21 defining a deformation zone 20a inside which the sheet of paper material 10 passes and is simultaneously subjected to plastic deformation becoming a corrugated sheet.
  • the first corrugation cylinder 21 and the second corrugation cylinder 22 are laterally connected to the frame so that during the advancement of the sheets 10, they are able to rotate, in relation to the frame, around a first rotation axis 21a and a second rotation axis 22a, substantially parallel to each other.
  • These axes are sized and/or connected by means of pins, bearings or other elements so as to allow slight flexings thereof if subjected to predetermined mechanical forces.
  • first 21 and the second corrugation cylinder 22 have suitably corrugated outer lateral surfaces respectively defining the first work surface 21b and the second work surface 22b.
  • the work surfaces 21b and 22b are corrugated and suitable to reciprocally engage so that between them the aforesaid deformation zone 20a is substantially defined through which the sheet 10 passes and deforms plastically in a counter-shaped manner to the work surfaces 21b and 22b.
  • the corrugation device 1 has, in correspondence with at least one of the cylinders 21 and 22, at least one thrust member 30 suitable for varying the deformation force by applying an additional pressure to one of the work surfaces (21b, 22b).
  • the corrugation device 1 has at least two thrust members 30 positioned alongside one another and suitable to apply the additional pressure to one of the work surfaces (21b, 22b) and, even more preferably, to the second work surface 22b.
  • the thrust member 30 is suitable to define a rest position, shown in Fig. 2 , wherein the thrust member 30 does not discharge such additional pressure on the work surface 22b and consequently the deformation force has a minimum value, and at least one working configuration, shown in Fig. 1 , wherein it applies an additional pressure to the work surface 22b so as to increase the deformation force.
  • it comprises at least one pressure body 31 suitable to exert the additional pressure on the work surface 22b, a support structure 32, suitable to support the pressure body 31, and drive means 33 suitable to move the support structure 32 and the pressure body 31 so as to allow the thrust member 30 to vary its configuration.
  • the pressure body 31 is suitable to be pressed against the second work surface 22b so as to discharge the additional pressure onto the second corrugation cylinder 22.
  • It may therefore be composed of a body counter-shaped to the outer profile of the second corrugation cylinder 22 or alternatively by a belt or similar element suitable to be deformed, preferably elastically, so as to acquire a counter-shape to the aforesaid outer profile.
  • the pressure body 31 is composed of said belt able to discharge the additional pressure on the surface 22b in an optimal manner.
  • the support structure 32 comprises one or more pairs of pulleys 32a, each of which is able to permit the pressure body 31 to be moved in relation to the support structure 32, and a support 32b able to sustain the pulleys 32a and thereby the pressure body 31 in the correct position.
  • It may in addition comprise at least one stop element 32c able to keep the pressure body 31 in the correct position.
  • the thrust member 30, arranged on the side opposite the pressure body 31 in relation to the support structure 32, has the drive means 33 suitable to permit it to vary its configuration.
  • the drive means 33 move the support structure 32 in such a way that the pressure body 31 comes into contact with the work surface 22b substantially diametrically opposite to the deformation zone 20a.
  • the drive means 33 therefore comprise a linear actuator suitable to apply the aforementioned force by means of a variation in extension substantially parallel to the direction of action 33a.
  • the drive means 33 comprise a series of pneumatic or hydraulic actuators suitable to vary their extension following a variation in internal pressure.
  • the drive means 33 comprise an inner tube provided with specific attachments for a power supply system which, by varying the internal pressure of the inner tube, causes an expansion thereof having a main direction of extension substantially parallel to the direction of action 33.
  • the thrust member 30 comprises a connection 34 suitable to weakly connect the support structure 32 to the frame so as to guide the movement of the support structure 32 to the second corrugation cylinder 22, an interconnection apparatus 35, suitable to position itself between the drive means 33 and the support 32b so as to permit a correct transfer of force between the aforesaid components, and a base wedge 36 suitable to position the drive means 33 in an inclined position so that, as described above the main direction of extension is substantially parallel to the direction of action 33a.
  • connection 34 preferably comprises a pin or other similar connection suitable to define a relative rotation axis 30a of the support structure 32 and therefore of the pressure body 31 in relation to the second corrugation cylinder 22.
  • the relative rotation axis 30a is substantially parallel to the rotation axes 21a and 22 of the corrugation cylinders 21 and 22.
  • the interconnection apparatus 35 comprises a contact plate 35a placed between the drive means 33 and the support structure 32 and a kinematism suitable to allow the contact plate 35a to follow the drive means 33 during the configuration between the two rest and work configurations.
  • the contact plate 35a is firmly connected to the drive means 33 so that when the thrust member 30 passes from the rest to the work configuration, it settles on the support 32b, permitting the correct transfer of forces between the drive means 33 and the support 32b.
  • the kinematism comprises a junction element 35b connected to the contact plate and to the frame by means of two pins which allow the junction element 35b to rotate both in relation to the frame and in relation to the contact plate 35a around rotation axes substantially parallel to the relative rotation axis 30a.
  • the functioning of the corrugation device according to the invention for sheets of paper material is as follows: initially the device 1 has the thrust member 30 in the rest position, that is with the pressure body 31 suitably separate from the work surface 22b so that the additional pressure is not discharged onto the second corrugation cylinder 22, and thus the deformation force is at its minimum value.
  • the operator adjusts the device 1 so as to achieve the desired deformation force.
  • the deformation force required is minimal, and consequently the device 1 is activated leaving the thrust member 30 in the rest position.
  • the operator activates the passage of the thrust member 30 from the rest to the working position so as to apply the additional pressure to the second corrugation cylinder 22 and thus increase the deformation force.
  • the drive means 33 expand along the direction of action 33a making the support structure 32 rotate around the relative rotation axis 30a and the pressure bodies 31 settle on the second work surface on the side opposite the deformation zone 20a.
  • the drive means 33 continue to expand along said direction of action 33a so that the pressure bodies 31 become taut and start to discharge an additional pressure on the second work surface 22b resulting substantially perpendicular to the deformation zone 20a and, preferably lying on the plane defined by the two rotation axes 21a and 22a.
  • the rotation axis 22 and/or the second corrugation cylinder 22 begin to deform and/or flex elastically determining, in correspondence with the deformation zone 20a, a reduction of the distance between the work surfaces 21b and 22b and thus, an increase of the deformation force undergone by the sheet of paper material 10 when it crosses said deformation zone 20a.
  • a minimum deformation or flexing of the second rotation axis 22a and/or of the second corrugation cylinder 22 is sufficient to achieve a significant variation in pressure on the sheet of paper material 10.
  • the flexing may therefore be a consequence both of the size of the corrugation cylinders and the rotation axes, and of the type of connection thereof.
  • the operator stops the expansion of the drive means 33 blocking the thrust member 30 in the position reached, and then commencing processing of the sheet 10.
  • the invention permits a new corrugation process of sheets in paper material.
  • Such corrugation process preferably comprises a calibration step of the deformation force during the processing of the sheet of paper material 10.
  • an additional pressure is applied to the second corrugation cylinder 22 by means of the thrust member 30 which, proving substantially parallel to the direction of action 33a, draws the second work surface 22b toward the first work surface 21b and thus varies the deformation force, as described above.
  • the invention achieves some important advantages.
  • a first important advantage lies in the extreme reliability of the corrugation device 1 of sheets of paper material 10 having different thicknesses and/or made from different materials from those for which the corrugation cylinders 21 and 22 were designed.
  • corrugation device 1 can adapt to sheets of paper material 10 of varying thicknesses in a fast and practical manner, and thus without the need for time-consuming and expensive calibration operations.
  • the device 1 while having corrugation cylinders 21 and 22 designed to process sheets of paper material 10 of a minimal thickness, is also able to process sheets 10 of greater thickness, increasing the deformation force thanks to the thrust members 30.
  • Another advantage is therefore the fact that, the device 1, being able to adapt to various types of sheet of paper material 10, minimises the number of corrugation cylinders needed.
  • Another advantage of no less importance is the greater production capacity of the device 1 thanks to a significantly shorter calibration time compared to the devices of the prior art.

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

Claims (6)

  1. Méthode d'ondulation de feuilles de papier comprenant les étapes suivantes :
    - la fourniture de deux cylindres d'ondulation (21, 22) disposant de surfaces de travail (21b, 22b) adaptées pour sensiblement s'engager l'une avec l'autre avec réciprocité afin de définir une zone de déformation (20a) et d'exercer une force de déformation sur lesdites feuilles de papier (10),
    - la fourniture d'un élément de poussée (30) mobile depuis une position de repos dans laquelle il est séparé de la surface de travail (22b) de l'un des deux cylindres d'ondulation (22) vers une position de travail, afin d'appliquer une pression supplémentaire sur l'un desdits cylindres d'ondulation (22),
    caractérisée en ce que la méthode comprend également les étapes suivantes :
    - le déplacement de l'élément de poussée (30) vers la position de travail afin d'appliquer une pression supplémentaire sur l'un desdits cylindres d'ondulation (22) et d'augmenter la force de déformation appliquée sur lesdites feuilles de papier (10) si l'épaisseur du papier (10) est supérieure à une épaisseur minimale prédéterminée, et
    - le traitement desdites feuilles de papier via ladite zone de déformation (20a), après que l'élément de poussée (30) a été déplacé sur la position de travail.
  2. Méthode selon la revendication 1, caractérisée en ce que l'épaisseur minimale prédéterminée est estimée lors d'une étape de conception des cylindres d'ondulation (21, 22).
  3. Méthode selon la revendication 2, comprenant également les étapes suivantes :
    - la déformation et/ou la flexion élastique de l'un desdits cylindres d'ondulation (22) via la pression supplémentaire appliquée par l'élément de poussée (30),
    - réduisant ainsi la distance entre les surfaces de travail (21b, 22b) des deux cylindres d'ondulation (21, 22).
  4. Méthode selon la revendication 3, comprenant également les étapes suivantes :
    - l'arrêt du mouvement de l'élément de poussée (30) lorsque la force de déformation appliquée sur lesdites feuilles de papier (10) atteint une valeur souhaitée prédéterminée bloquant l'élément de poussée (30) dans la position atteinte.
  5. Méthode selon la revendication 4, caractérisée en ce que la valeur de la force de déformation souhaitée et prédéterminée est estimée lors d'une étape de conception des cylindres d'ondulation (21, 22).
  6. Méthode selon l'une quelconque des revendications précédentes, comprenant également :
    - une étape d'étalonnage de la force de déformation lors du traitement de la feuille de papier (10), appliquant une pression supplémentaire sur l'un desdits cylindres d'ondulation (22) au moyen de l'élément de poussée (30) et variant ainsi la force de déformation.
EP13164474.2A 2013-04-19 2013-04-19 Dispositif d'ondulation du matériau pour feuilles de papier Active EP2792477B8 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13164474.2A EP2792477B8 (fr) 2013-04-19 2013-04-19 Dispositif d'ondulation du matériau pour feuilles de papier
ES13164474.2T ES2686072T3 (es) 2013-04-19 2013-04-19 Un dispositivo de corrugación para hojas de material de papel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13164474.2A EP2792477B8 (fr) 2013-04-19 2013-04-19 Dispositif d'ondulation du matériau pour feuilles de papier

Publications (3)

Publication Number Publication Date
EP2792477A1 EP2792477A1 (fr) 2014-10-22
EP2792477B1 true EP2792477B1 (fr) 2018-08-08
EP2792477B8 EP2792477B8 (fr) 2019-01-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13164474.2A Active EP2792477B8 (fr) 2013-04-19 2013-04-19 Dispositif d'ondulation du matériau pour feuilles de papier

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EP (1) EP2792477B8 (fr)
ES (1) ES2686072T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000009898A1 (it) * 2020-05-05 2021-11-05 Fosber Spa Un gruppo ondulatore per la produzione di cartone ondulato con un gruppo di pressione con un organo flessibile continuo
IT202000009901A1 (it) 2020-05-05 2021-11-05 Fosber Spa Un gruppo ondulatore per la produzione di cartone ondulato con un sistema facilitato per la sostituzione della cinghia di pressione
IT202000009910A1 (it) 2020-05-05 2021-11-05 Fosber Spa Un gruppo ondulatore per la produzione di cartone ondulato con un sistema di controllo dell'organo di pressione

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6012501A (en) * 1996-03-26 2000-01-11 Marquip, Inc. Single facer with small intermediate corrugating roll and variable wrap arm device
IT1298011B1 (it) * 1997-07-11 1999-12-20 Agnati Spa Gruppo ondulare, in particolare per fogli o nastri di materiale cartaceo, o simili.
IT1305959B1 (it) * 1998-05-11 2001-05-21 Agnati Spa Gruppo per l'accopiamento di fogli di materiale cartaceo nellemacchine per la fabbricazione di cartone ondualto.
US6602375B2 (en) * 2001-10-09 2003-08-05 Carl R. Marschke Single facer drive apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2792477B8 (fr) 2019-01-02
ES2686072T3 (es) 2018-10-16
EP2792477A1 (fr) 2014-10-22

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