EP3016805B1 - Procédé et dispositif pour serrer deux cylindres l'un contre l'autre dans une machine d'impression - Google Patents

Procédé et dispositif pour serrer deux cylindres l'un contre l'autre dans une machine d'impression Download PDF

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Publication number
EP3016805B1
EP3016805B1 EP14736785.8A EP14736785A EP3016805B1 EP 3016805 B1 EP3016805 B1 EP 3016805B1 EP 14736785 A EP14736785 A EP 14736785A EP 3016805 B1 EP3016805 B1 EP 3016805B1
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EP
European Patent Office
Prior art keywords
cylinder
value
rotation
measured variable
positioning
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
EP14736785.8A
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German (de)
English (en)
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EP3016805A1 (fr
Inventor
Rainer Ehrenberg
Uwe HÖWELMEYER
Mario FRANKENBERG
Wolfgang Sprehe
Frank Gunschera
Frank Westhof
Martin Krümpelmann
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0072—Devices for measuring the pressure between cylinders or bearer rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/30—Bearings mounted on sliding supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B41F13/38—Cylinder lifting or adjusting devices electrically or magnetically operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/02—Arrangements of indicating devices, e.g. counters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a method and apparatus for mutual adjustment of two cylinders in a printing press.
  • the cylinders involved in a flexographic printing process and in a flexographic printing machine on the printing process must be made very close to each other in order to ensure the optimal color transfer mentioned above. This is due to the fact that in flexographic printing the printing areas are raised compared to the non-printing areas of a printed image.
  • the print jobs on a printing press change relatively frequently, which is usually accompanied by the change of at least the printing plates or the cylinder components on which they are mounted. This often also changes the print length, d. H. the circumference of the cylinders.
  • the optimum setting position must be determined using a positioning method. A great desire is to produce as little waste as possible.
  • the two cylinders which preferably have at each of its ends an adjusting device which comprise at least bearing blocks and actuators, gradually approached each other.
  • the respective setting position whose optimum value is to be determined yes, is determined in each case and also stored.
  • the two cylinders rotate by the influence of drives.
  • the peripheral speeds of the two cylinders are different.
  • the one measured variable of at least one of the two cylinders is permanently measured and their values are measured and stored.
  • the rotational speed of the cylinder is a suitable measure.
  • Another suitable measure is the braking force.
  • the measured variable initially has a substantially constant basic value, which can be referred to as the initial value.
  • the EP 1 018 426 A1 discloses a very similar method.
  • the EP 2 085 223 A1 shows a further method for employment of second cylinder, wherein the cylinders are kept in constant contact and during a test drive, which lasts a complete printing cylinder revolution, the setting position is measured and recorded.
  • the largest setting position ie the largest measured distance between the impression cylinder and impression cylinder, is now considered to be the optimum printing position.
  • the object of the present invention is therefore to propose a method and a device with which the finding of the optimum setting position of two cylinders can be accelerated.
  • this object is achieved on the basis of the above-mentioned features by the features of the characterizing part of claim 1. Accordingly, it is provided that the value of the rotation angle is recorded at which there is a deviation of the value of the measured variable from the initial value. It is therefore intended not to abort the process already upon detection of the first contact, but instead to record the entire angle of rotation at which the deviation already described for the first contact occurs Initial value results. If, for example, there is a small angle of rotation, for example of one or a few degrees, then it can often be assumed that the optimum setting value has not yet been reached. If, however, a larger angle of rotation arises, then one can assume that already a major part or the entire part of the printing areas has contact with the second cylinder, so that one is already close to the optimum adjustment value.
  • the invention provides that even after the first contact, which is associated with a Anstellwert, the employment is carried out further, so the relative distance between the cylinder involved in the process is further reduced. After this renewed change in the setting position, the measuring run just described is repeated. In turn, the value of the angle of rotation is recorded at which a deviation of the value of the measured variable from the initial value results. In this case, further pressure ranges can now be detected, which are "deeper" with respect to the first contact surface, the outer surface of which therefore has a smaller distance from the axis of rotation of the cylinder than the surface initially determined. The value of the rotation angle at which a deviation of the value of the measured variable from the initial value results is in such a case a higher value.
  • the change in the setting position is preferably carried out in steps with a width of less than 50 micrometers, in particular less than 25 micrometers.
  • a function of the value of the angle of rotation which results in a deviation of the value of the measured variable from the initial value, depending on the setting position, is thus obtained.
  • the value should initially be at 0, increase with further reduction of the distance of the cylinder and later go into a saturation region.
  • the number of different setting positions, which are controlled by the control unit, can be limited when the saturation range is reached. The number can also be before Implementation of the method by the machine operator or machine side be given or be.
  • the optimal positioning position can now be found from the described function as follows: Where the function has the greatest slope (ie a maximum in the derivative), the optimum positioning position can first be determined. However, in order to detect the deeper areas, the slopes of the function are now also checked for other positioning positions. The next highest slope, especially the second largest slope, is now set as the optimal pitch. In a further embodiment, however, this position is only considered to be the optimum setting position if the value of this gradient has a minimum proportion of the value of the greatest gradient. For example, the second largest slope is only evaluated if its value is at least 10% of the value of the largest slope.
  • FIG. 1 shows a typical flexographic printing machine 100 equipped with a two-cylinder reciprocating device.
  • the printing machine shown is a so-called central cylinder flexographic printing machine and includes the essential components described below.
  • an unwinding device 101 is provided for unwinding a material web 110 from a winding 111.
  • This material web 110 is supplied to the printing unit 102, in which it is acted upon by at least one color.
  • the printed material web 110 is passed through a drying device in which the printed ink is dried.
  • the winding of the material web 110 takes place on a winding 112 in the winding device 104.
  • the printing unit 102 comprises a central impression cylinder 120, on which the material web 110 is laid on by means of a pressure roller 121.
  • the material web 110 always lying on the outer surface of the impression cylinder 120, passed over several inking units, one of which is exemplified by the reference numeral 122. With every inking unit, a printing ink can be applied to the material web.
  • An inking unit 122 in this case comprises a format cylinder 123 and an inking roller 124, which is generally designed as an anilox roller.
  • FIG. 2 shows now in an enlarged view a section of the printing unit 122.
  • the displacement device 210 for the format cylinder 123 which comprises a carriage 211 which carries the format cylinder 123.
  • the carriage is linearly displaceable on a rail 212.
  • the displacement is effected by the motor M S , which drives a spindle 213, which is screwed into a thread of the carriage.
  • M S which drives a spindle 213
  • the drive which here through a motor is realized, is controlled by the control device S or even regulated.
  • the drive of the format cylinder is effected by the motor M FZ , which is also controlled by the control device.
  • the format cylinder rotates in the direction of the arrow R FZ .
  • the format cylinder has a radius r.
  • the drive of the impression cylinder is effected by the motor M GDZ , which is also controlled by the control device.
  • the impression cylinder rotates in the direction of the arrow R GDZ .
  • the format cylinder is covered with a first pressure plate 221 and a second pressure plate 222 whose outer surfaces lie on the radii r 1 and r 2 .
  • the relation r ⁇ r 2 ⁇ r 1 applies.
  • the pressure plate 221 occupies the angle ⁇ 1
  • the pressure plate 222 the angle ⁇ 2 .
  • the format cylinder is now gradually approximated to the impression cylinder along the axis x.
  • format cylinder and impression cylinder are driven at different speeds, the format cylinder is advantageously driven at the higher speed.
  • To drive the format cylinder is preferably an asynchronous motor, which is operated in the field weakening operation, used, as shown in the DE 2009 025 053 A1 is described.
  • the format cylinder 123 essentially rotates one full revolution until it is further approximated to the impression cylinder 120. First, the printing plates 221 have no contact with the printing material, not shown, which rests on the impression cylinder 120.
  • this path is shown in area I.
  • the format cylinder 123 undergoes no speed change or a braking force.
  • the pressure plate 221 in contact with the impression cylinder 120 and the substrate.
  • the format cylinder 123 now experiences a deceleration or a braking force which extends over the angle ⁇ 1 , which in the FIG. 3 marked as area II.
  • a slowdown is thereby detected that approaches the rotational speed of the format cylinder 123 to the rotational speed of the impression cylinder 120.
  • rotational speed is meant here the peripheral speed.
  • the pressure plate 222 still has no contact with the impression cylinder 120.
  • r is the distance of the axis of rotation of the format cylinder to the peripheral surface of the impression cylinder.
  • Another possibility for a termination criterion may be the second largest change in the FIG. 3 be recorded function. In this example, this is the transition from area II to area III.
  • LIST OF REFERENCE NUMBERS 100 flexographic printing 101 unwinding 102 printing unit 104 takeup 120 Impression cylinder 121 pressure roller 122 inking 123 Formatzyl inder 124 Inking roller 210 shifter 211 carriage 212 rail 213 spindle 221 printing plate 222 printing plate M FZ engine M GDZ engine M s engine S control device rr 1 r 2 radius R FZ Direction format cylinder R GDZ Direction impression cylinder ⁇ 1 angle ⁇ 2 angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (11)

  1. Procédé pour serrer deux cylindres (120, 123) dans une machine à imprimer (100) :
    • les cylindres (120, 123) étant entraînés avec respectivement au moins un entraînement avec des vitesses périphériques différentes,
    • au moins le premier cylindre (120) étant déplacé au moyen d'au moins un équipement de serrage en direction du deuxième cylindre (123), la position de serrage étant définie,
    • les valeurs d'au moins une grandeur de mesure d'au moins un des deux cylindres (120, 123) étant détectées par un équipement de mesure ou de détection,
    • les valeurs de la grandeur de mesure étant reçues et l'équipement de serrage étant piloté au moyen d'un dispositif de commande,
    • la position de serrage étant déterminée, et il en résulte la première modification de la valeur de la grandeur de mesure du cylindre (120, 123) au moins au nombre de un par rapport à une valeur initiale de cette grandeur de mesure,
    caractérisé en ce que
    la plage angulaire (α, α1, α2) de l'angle de rotation pour laquelle il résulte un écart de la valeur de grandeur de mesure à la valeur initiale est enregistrée
    et,
    après la détermination de la position de serrage pour laquelle il résulte la première modification de la valeur de la grandeur de mesure du cylindre (120, 123) au moins au nombre de un par rapport à la valeur initiale, le premier cylindre est déplacé en direction du deuxième cylindre au moins une autre fois, la plage angulaire de l'angle de rotation pour laquelle il résulte un écart de la grandeur de mesure à la valeur initiale étant enregistrée de nouveau.
  2. Procédé selon la revendication précédente,
    caractérisé en ce que
    la grandeur de mesure est la vitesse angulaire du cylindre.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le premier cylindre est déplacé en direction du deuxième cylindre après que le premier cylindre a effectué au moins une rotation complète.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le premier cylindre est déplacé plusieurs fois en direction du deuxième cylindre,
    pour chaque position de serrage, il est déterminé la valeur de rotation pour laquelle il résulte un écart de la valeur de la grandeur de mesure à la valeur initiale, et
    la part relative respective de la valeur de l'angle de rotation à l'angle de rotation total d'une rotation du premier cylindre en fonction de la position de serrage est enregistrée.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    qu'il est déterminé une première valeur de serrage à laquelle se situe la plus grande variation de la part relative de l'angle de rotation à l'angle de rotation total d'une rotation du premier cylindre pour laquelle il résulte un écart de la valeur de la grandeur de mesure à la valeur initiale.
  6. Procédé selon l'une des deux revendications précédentes,
    caractérisé en ce
    qu'il est déterminé au moins une autre valeur de serrage à laquelle se situe la deuxième plus grande variation de la part relative de l'angle de rotation à l'angle de rotation total d'une rotation du premier cylindre pour laquelle il résulte un écart de la valeur de grandeur de mesure à la valeur initiale.
  7. Procédé selon l'une des trois revendications précédentes,
    caractérisé en ce que
    la première valeur de serrage est d'abord spécifiée en tant que valeur de serrage optimale.
  8. Procédé selon la revendication précédente,
    caractérisé en ce que
    l'autre valeur de serrage au moins au nombre de un est spécifiée en tant que valeur de serrage optimale à laquelle se situe la deuxième plus grande modification de la part relative de l'angle de rotation à l'angle de rotation total d'une rotation du premier cylindre pour laquelle il résulte un écart de la valeur de la grandeur de mesure à la valeur initiale si la valeur de cette deuxième plus grande pente dépasse une part spécifiée de la plus grande pente.
  9. Procédé selon l'une des deux revendications précédentes,
    caractérisée en ce que
    le premier cylindre est serré sur le deuxième cylindre conformément à la valeur de serrage optimale.
  10. Procédé selon l'une des revendications précédentes,
    caractérisée en ce que,
    au moyen de respectivement un équipement de serrage pour chaque extrémité du premier cylindre, ce cylindre est déplacé, la valeur de serrage du premier équipement de serrage suivant ou précédant le deuxième équipement de serrage.
  11. Dispositif pour le serrage de deux cylindres l'un contre l'autre dans une machine à imprimer (100), dans lequel les cylindres (120, 123) sont mis en rotation,
    • les cylindres (120, 123) pouvant être entraînés avec respectivement au moins un entraînement avec une vitesse de rotation différente,
    • le premier cylindre pouvant être déplacé en direction du deuxième cylindre au moyen d'au moins un équipement de serrage, la position de serrage pouvant être définie au moyen d'un équipement de définition de distance,
    • les valeurs d'au moins une grandeur de mesure d'au moins un des deux cylindres (120, 123) pouvant être détectées par un équipement de mesure ou de détection,
    • un dispositif de commande étant prévu, avec lequel l'équipement de serrage peut être piloté et avec lequel la valeur respective de la grandeur de mesure peut être reçue par l'équipement de mesure ou de détection et affectée à la position de serrage, la position de serrage pour laquelle la valeur de la grandeur de mesure est modifiée en comparaison avec la valeur de la grandeur de mesure pour une position de serrage antérieure pouvant être conservée avec l'équipement de commande,
    caractérisé en ce que
    la plage angulaire (α, α1, α2) de l'angle de rotation pour laquelle on peut observer un écart de la valeur de la grandeur de mesure à la valeur initiale peut être enregistrée avec l'équipement de commande, et
    l'équipement de serrage peut être piloté avec l'équipement de commande au moins une fois supplémentaire pour le déplacement du premier cylindre en direction du deuxième cylindre, la plage angulaire (α, α1, α2) de l'angle de rotation pour laquelle il résulte un écart de la valeur de la grandeur de mesure à la valeur initiale peut être enregistrée de nouveau par l'équipement de commande.
EP14736785.8A 2013-07-05 2014-07-07 Procédé et dispositif pour serrer deux cylindres l'un contre l'autre dans une machine d'impression Active EP3016805B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013213264 2013-07-05
PCT/EP2014/064452 WO2015001126A1 (fr) 2013-07-05 2014-07-07 Procédé et dispositif pour serrer deux cylindres l'un contre l'autre dans une machine à imprimer

Publications (2)

Publication Number Publication Date
EP3016805A1 EP3016805A1 (fr) 2016-05-11
EP3016805B1 true EP3016805B1 (fr) 2017-05-17

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Application Number Title Priority Date Filing Date
EP14736785.8A Active EP3016805B1 (fr) 2013-07-05 2014-07-07 Procédé et dispositif pour serrer deux cylindres l'un contre l'autre dans une machine d'impression

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Country Link
EP (1) EP3016805B1 (fr)
ES (1) ES2634519T3 (fr)
WO (1) WO2015001126A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016208109A1 (de) * 2016-05-11 2017-11-16 Koenig & Bauer Ag Verfahren zum Erfassen und Einstellen von Parametern eines Bearbeitungsaggregats
DE102016015722B4 (de) 2016-05-11 2023-06-22 Koenig & Bauer Ag Verfahren zum Erfassen und Einstellen von Parametern eines Bearbeitungsaggregats
US11298932B2 (en) 2019-03-19 2022-04-12 Koenig & Bauer Ag Method for determining the position of mutual contact between a printing roller and at least one counter roller
IT201900003965A1 (it) * 2019-03-19 2020-09-19 Koenig & Bauer Flexotecnica S P A Metodo per la determinazione della posizione di mutuo contatto tra un rullo di stampa e almeno un contro-rullo scelto tra un tamburo centrale e un rullo inchiostratore in macchine di stampa flessografica e la relativa macchina di stampa flessografica

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19900258A1 (de) * 1999-01-07 2000-07-13 Fischer & Krecke Gmbh & Co Verfahren zum Anstellen zweier Zylinder einer Druckmaschine gegeneinander
ES2300209B1 (es) * 2006-11-22 2009-05-01 Comexi, S.A. Metodo de ajuste posicional de cuerpos impresores en maquinas impresoras flexograficas.
DE102009025053A1 (de) * 2009-06-10 2010-12-16 Windmöller & Hölscher Kg Vorrichtung und Verfahren zum gegenseitigen Anstellen zumindest zweier Zylinder einer Druckmaschine

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ES2634519T3 (es) 2017-09-28
WO2015001126A1 (fr) 2015-01-08
EP3016805A1 (fr) 2016-05-11

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