EP1974915A2 - Unité d'impression d'une presse rotative - Google Patents

Unité d'impression d'une presse rotative Download PDF

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Publication number
EP1974915A2
EP1974915A2 EP08002499A EP08002499A EP1974915A2 EP 1974915 A2 EP1974915 A2 EP 1974915A2 EP 08002499 A EP08002499 A EP 08002499A EP 08002499 A EP08002499 A EP 08002499A EP 1974915 A2 EP1974915 A2 EP 1974915A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
printing unit
transfer
printing
drive
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.)
Withdrawn
Application number
EP08002499A
Other languages
German (de)
English (en)
Other versions
EP1974915A3 (fr
Inventor
Alfons Baintner
Karl-Heinz Bienert
Maximilian Eder
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.)
Manroland AG
Original Assignee
Manroland AG
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 Manroland AG filed Critical Manroland AG
Publication of EP1974915A2 publication Critical patent/EP1974915A2/fr
Publication of EP1974915A3 publication Critical patent/EP1974915A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines

Definitions

  • the invention relates to a printing unit of a web-fed printing press according to the preamble of claim 1 or 10 or 19.
  • printing units of web presses usually have several printing units, each printing unit having a transfer cylinder, a plate cylinder, an inking unit and optionally a dampening unit.
  • the form cylinder are also referred to as a plate cylinder and the transfer cylinder as a rubber cylinder.
  • printing units may comprise satellite cylinders, wherein a satellite cylinder usually interacts with a plurality of transfer cylinders of different printing units.
  • Printing units with at least one satellite cylinder are also referred to as satellite printing units.
  • satellite printing units In addition to satellite printing units having satellite cylinders, printing units are also known which do not have satellite cylinders, with printing units without satellite cylinders usually the transfer cylinders of two printing couples roll on each other.
  • Printing units with four printing units and thus four transfer cylinders and four forme cylinders, but without satellite cylinders, are also referred to as 8-cylinder printing units.
  • Printing units with four printing units and one satellite cylinder or two satellite cylinders are also referred to as 9-cylinder satellite printing units or 10-cylinder satellite printing units.
  • the transfer cylinders of such printing units of web-fed printing presses are mounted on a frame of the printing unit such that the transfer cylinders can be displaced between a print-on position and a print-off position.
  • a transfer cylinder In the print-on position, a transfer cylinder abuts a satellite cylinder or a transfer cylinder of an adjacent printing unit.
  • the transfer cylinder z. B. occupies for setup purposes, however, there is no contact between the transfer cylinder and the satellite cylinder or the transfer cylinder of the adjacent printing unit.
  • the method of the transfer cylinder between the pressure-on position and the pressure-off position is usually carried out pneumatically in an approximately translational movement of the respective transfer cylinder.
  • a separate drive is preferably assigned to each transfer cylinder in order to drive the respective transfer cylinder.
  • the or each satellite cylinder is usually not associated with a separate drive, but rather the drive of the or each satellite cylinder takes place from one of the transfer cylinders, which roll on the corresponding satellite cylinder.
  • a satellite printing unit at least one transfer cylinder on the one hand with a satellite cylinder and on the other hand with the drive of the same gear side toothed.
  • a transmission cylinder associated with the gear wheel is therefore associated with a satellite cylinder associated with the gear and the drive of the transfer cylinder gear, wherein the gear of the satellite cylinder and the gear of the drive on non-displaceable axes, namely on the non-displaceable axis of the satellite cylinder and the non-displaceable axis of the drive, are arranged.
  • the gear of the drive of the transfer cylinder is also to be regarded as rigid or rotationally fixed with respect to an externally imposed rotation.
  • the drive side Upon displacement of a transfer cylinder, the drive side is toothed with a satellite cylinder and a drive, between the pressure-on position and the pressure-off position as a result of an approximately translational movement so is the transfer cylinder on one side with the non-rotatable gear the drive and on the other hand with the gear of the satellite cylinder in engagement, wherein the gear of the satellite cylinder allows a rotational movement and thus a rotation of the satellite cylinder.
  • a Momentanpol on which the transfer cylinder rolls off quasi This ultimately causes a rotation of the satellite cylinder.
  • Such rotation of the satellite cylinder upon displacement of the same driving transfer cylinder between the print-on position and the print-off position may result in cracks in a printing substrate to be printed.
  • the above problem of the formation of cracks in the substrate web is in satellite printing units not only on the printing unit, the transfer cylinder drives a satellite cylinder, but also on such printing units, which are not in drive-side engagement with the satellite cylinder.
  • the transfer cylinder drives a satellite cylinder, but also on such printing units, which are not in drive-side engagement with the satellite cylinder.
  • cracks can then form in a printing material web, if in the printing units of a printing unit, the displacement of the corresponding transfer cylinder between the print-on position and the print-off position in different orientation to the direction of the printing substrate.
  • the above problem of the formation of cracks in the substrate web is not only for satellite printing units, but also for printing units that have no satellite cylinder.
  • each transfer cylinder of the printing unit is associated with a position sensor, which detects the position of the respective transfer cylinder metrologically, wherein the compensation device based on the determined by the position encoder position-actual values of the transfer cylinder controls the drives of the same, that the risk of the formation of cracks in the printing substrate is minimized during the translational displacement of the transfer cylinder between the print-on position and the print-off position.
  • the present invention is based on the problem to provide a novel printing unit of a web-fed printing press.
  • a printing unit according to claim 1.
  • the compensation means controls, based on at least one predetermined correction value, a drive of at least the transfer cylinder which causes its displacement between the print-on position and the print-off position to rotate the satellite cylinder driven by it, such that the drive compensates for the rotation of the satellite cylinder due to the displacement of the transfer cylinder.
  • this problem is solved by a printing unit according to claim 10.
  • the compensation device controls a drive of the or each transfer cylinder, which is subject to a shift between the print-on position and the print-off position based on at least one previously determined correction value, and / or a drive of the respective impression cylinder.
  • the compensation device actuates drives exclusively on the basis of at least one previously determined correction value.
  • the compensation device of the printing unit according to the invention thus comes out entirely without position encoder. As a result, the structure of a printing unit can be simplified. Furthermore, costs are reduced.
  • this problem is solved by a printing unit according to claim 19.
  • the or each satellite cylinder is associated with a position sensor, with the aid of which the position of the respective satellite cylinder can be detected, wherein the compensation device based on the determined by the position encoder actual position values a drive at least the transfer cylinder, which in its displacement between the pressure-on position and the pressure-off position causes a rotation of the satellite cylinder driven by the same, controls such that the drive compensates for the rotation of the satellite cylinder due to the displacement of the transfer cylinder.
  • the compensation device of the printing unit according to the invention also comes out without positional encoders associated with the transfer cylinders. Rather, according to the third aspect of the invention the or each satellite cylinder associated with a position sensor based on the measurement signal, the compensation device controls the drives of the transfer cylinder.
  • Fig. 1 shows a schematic representation of a printing unit 10 according to the invention according to a first embodiment of the present invention, wherein in the embodiment of the Fig. 1 the printing unit 10 comprises a total of four printing units 11, 12, 13 and 14. Each of the printing units 11, 12, 13 and 14 has a forme cylinder 15 and a rolling on the forme cylinder transfer cylinder 16.
  • the form cylinder are also referred to as a plate cylinder and transfer cylinder as a rubber cylinder.
  • the transfer cylinders 16 of all printing units 11, 12, 13 and 14 roll on a common satellite cylinder 17 to form printing gaps through which a printing substrate to be printed is conveyed from.
  • the printing unit 10 of Fig. 1 is therefore designed as a 9-cylinder satellite pressure unit.
  • Each transfer cylinder 16 of the printing unit 10 is associated with a drive 18 which drives the respective transfer cylinder 16.
  • the satellite cylinder 17 of the printing unit 10 is assigned no drive, but the satellite cylinder 17 from the transfer cylinder 16 of a printing unit 12 can be driven.
  • the transfer cylinder 16 of the printing unit 12 is therefore on the one hand on the drive side with the drive 18 and on the other hand with the satellite cylinder 17 in contact.
  • the transfer cylinders 16 of all printing units 11, 12, 13 and 14 of the printing unit 10 are displaceable between a print-on position and a print-off position.
  • the pressure-off position take the transfer cylinder 16 z. B. for the execution of set-up. In the print-on position, however, a substrate web can be printed. Then, when the transfer cylinders 16 are displaced between the print-on position and the print-off position, there is a fear that cracks will form in a printing material web fed into the printing unit 10.
  • the printing unit 10 of the invention Fig. 1 has a compensation device 19.
  • the compensation device controls on the basis of at least one previously determined correction value, the drive 18 at least the transfer cylinder 16 of the printing unit 12, which is the drive side coupled to the satellite cylinder 17 and at its displacement between the pressure-on position and the pressure -Ab position causes a rotation of the same driven by the satellite cylinder 17, such that the drive 18 compensates for the displacement of the satellite cylinder 17 due to the displacement of the transfer cylinder 16.
  • the or each correction value, on the basis of which the compensation device 19 drives the drive 18 of the transfer cylinder 16 of the printing unit 12, is determined by calculation or by design and / or by measurement or experiment. On the basis of the or each computationally or constructively and / or metrologically or experimentally determined correction value, a linear compensation takes place in the sense of a control.
  • Fig. 1 controls the compensation device 19 not only the drive 18 of the transfer cylinder 16 of the printing unit 12, which is the drive side coupled to the satellite cylinder 17, but also the drives 18 of the transfer cylinder 16 of the printing units 11, 13 and 14, the transfer cylinder 16 is not the drive side with the satellite cylinder 17 are coupled. In this way, upon displacement of each of the transfer cylinders 16 between the print-on position and the print-off position, the formation of cracks in a drawn into the printing unit 10 substrate web can be prevented.
  • At least one correction path and at least one correction time are determined.
  • the correction time is the time in which the compensation controlled by the compensating device 19 in the respective printing unit must be completed by activation of the corresponding drive 18.
  • the correction time may be maximum as long as the time required in the corresponding printing unit for the displacement of the transfer cylinder 16 between the print-on position.
  • This correction time is identical and constant in the simplest case for all printing units 11, 12, 13 and 14 of the printing unit 10, wherein then the correction time is based on the printing unit, in which the shift between the print-on position and the print-off position. Position takes place within the shortest time. However, an individual correction time can also be kept available for each printing unit.
  • the correction path is the angle or circumferential section about which the satellite cylinder 17 is rotated by the compensating device 19 in a controlled manner in order to preclude cracking in the printing material web.
  • the correction values are determined beforehand by computational or constructive and / or metrological or experimental. It should be noted that the correction values depend on many influencing factors, such. As the weight of the cylinder, the ease of kinematics or even whether transfer cylinders are displaced in the displacement between the pressure-on position and the pressure-off position against gravity or in the direction of gravity.
  • the previously determined correction values of the compensation device 19 are constant. However, it is also possible that only the or each correction path is constant and the or each correction time is variable.
  • a suitable device in the range of each printing unit 11, 12, 13 and 14 individually to the displacement of the corresponding transfer cylinder 16 between the print-on position and the pressure-off position required time is determined. This may be z. B. to act a device that generates an electrical pulse upon initiation of the adjustment and at the end of the same. If this time is determined in recurring processes in the area of each printing unit, a correction time individually adapted for each printing unit can be kept ready for subsequent correction operations.
  • the compensation device 19 then controls the drives 18 of the transfer cylinders 16 of the printing units 11 to 14 in the sense of an adaptive control.
  • the invention is not limited to the case of a 9-cylinder satellite printing unit. Rather, the invention also in the printing unit 20 of the Fig. 2 are used, the printing unit 20 of the Fig. 2 in turn, four printing units 21, 22, 23 and 24, each having a forme cylinder 25 and a transfer cylinder 26 has.
  • the printing unit 20 of the Fig. 2 there are two satellite cylinders 27, wherein on each of the two satellite cylinders 27, the transfer cylinders 26 of each two printing units 21, 22 and 23, 24 roll.
  • the printing unit 20 of the Fig. 2 it is therefore a 10-cylinder satellite printing unit.
  • Each drive cylinder 28 is associated with a drive 28, wherein each drive 28 can be controlled by the compensation device 29.
  • the control can in analogy to that for the embodiment of Fig. 1 described procedure, so that reference is made to avoid unnecessary repetition of the above statements.
  • the invention is not limited to use with satellite printing units. Rather, the invention can also be used in printing units that do not have a satellite cylinder.
  • Fig. 3 and 4 Embodiments of printing units according to the invention without satellite cylinder. So shows Fig. 3 a printing unit 30 according to the invention with four printing units 31, 32, 33 and 34, wherein each of the printing units has a forme cylinder 35 and a transfer cylinder 36.
  • the transfer cylinder 36 of each two juxtaposed printing units 31 and 32 or 33 and 34 roll to form a printing nip through which a printing material to be printed is conveyed from.
  • the printing unit 30 of the Fig. 3 it is therefore an 8-cylinder printing unit.
  • each drive cylinder 36 of the printing units 31, 32, 33 and 34 a drive 37 associated with the transfer cylinder 36 of all printing units 31 to 34 are therefore independently drivable. It is therefore in the embodiment of Fig. 3 no drive-side coupling between the transfer cylinders 36 of the different printing units.
  • the printing unit 30 of the embodiment of Fig. 3 a compensation device 38 is assigned. The compensation device 38 controls based on previously determined correction values the drives 37 of the transfer cylinder 36, which are subject to a shift between the print-on position and the print-off position, such that no cracks form in a printing substrate to be printed.
  • correction values are in turn computationally or constructively and / or metrologically or experimentally determined correction values, on the basis of which the compensation device 38 carries out a linear compensation.
  • the correction values may be constant or variable.
  • FIG. 4 Another embodiment of a printing unit 40 according to the invention shows Fig. 4 , wherein also the printing unit 40 of the Fig. 4 four printing units 41, 42, 43 and 44, each with a forme cylinder 45 and a respective transfer cylinder 46 includes, and wherein in turn the transfer cylinder 46 of two juxtaposed printing units 41 and 42 or 43 and 44 roll each other to form a pressure nip.
  • the printing unit 40 of Fig. 4 it is therefore just as in the printing unit 30 of the Fig. 3 around an 8-cylinder printing unit.
  • the printing unit of Fig. 4 differs from the printing unit 30 of the Fig. 3 in that in the printing unit 40 of the Fig. 4 only one of the successive rolling transfer cylinder 46 of juxtaposed printing units 41 and 42 or 43 and 44, a drive 47 is assigned to drive the respective transfer cylinder 46 directly.
  • the transfer cylinder 46 of the juxtaposed printing units 41 and 42 or 43 and 44, which is not associated with its own drive, is indirectly driven by the other transfer cylinder 46.
  • the compensation unit 48 controls the drives 47 of the transfer cylinders 46 of the printing units 42, 44 on the basis of previously determined correction values such that cracking in a printing material to be printed is avoided.
  • Fig. 1 to 4 All embodiments of the Fig. 1 to 4 It is common that the compensation devices actuators based on advance, computationally or constructively and / or metrologically or experimentally determined correction drive such drives that cracks are minimized in a substrate to be printed. Furthermore, shocks to the web tension can be minimized.
  • a simple and cost-effective design of printing units of a web-fed printing press which manage without position encoder in the transfer cylinder, can also be realized that in satellite printing units the or each satellite cylinder is associated with a position sensor, with the aid of which the position of the respective satellite cylinder can be detected.
  • the compensation device of the printing unit then regulates based on the position-actual values determined by the respective position encoder the drive at least of the transfer cylinder, which in its displacement between the pressure-on position and the pressure-off position, the rotation of the driven by the same satellite cylinder causes such that the drive compensates for the displacement of the satellite cylinder due to the displacement of the transfer cylinder.
  • Fig. 1 to 4 has been described without exception for printing units with four printing units, the invention is not limited thereto. Rather, the invention can also be used in printing units with three printing units, two printing units or a single printing unit.
  • the transfer cylinder of this printing unit rolls on a counter-pressure cylinder, wherein a drive then either drives into the transfer cylinder or in the impression cylinder.
  • the invention can also be used with such printing units in which, in addition to the transfer cylinders or alternatively to the transfer cylinders, the forme cylinders of the printing couples can be displaced between a print on position and a print off position.
  • the invention can also be used in such printing units, in which drive drives not in the transfer cylinder but rather in the form cylinder of the printing units. Also in this case, the transfer cylinders of the printing units and / or the form cylinder of the printing units between a print-on position and a print-off position are then displaced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP08002499A 2007-02-13 2008-02-12 Unité d'impression d'une presse rotative Withdrawn EP1974915A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007007586 2007-02-13

Publications (2)

Publication Number Publication Date
EP1974915A2 true EP1974915A2 (fr) 2008-10-01
EP1974915A3 EP1974915A3 (fr) 2010-01-06

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ID=39415053

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Application Number Title Priority Date Filing Date
EP08002499A Withdrawn EP1974915A3 (fr) 2007-02-13 2008-02-12 Unité d'impression d'une presse rotative

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EP (1) EP1974915A3 (fr)
DE (1) DE102007010289A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009047356A1 (de) * 2009-12-01 2011-06-09 Manroland Ag Druckeinheit einer Rollendruckmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614818A1 (de) * 1996-04-15 1997-10-16 Wifag Maschf Drehgeber für einen Zylinder einer Druckmaschine
DE19720952A1 (de) * 1997-05-17 1998-11-19 Roland Man Druckmasch Schwenkbarer, durch einen elektrischen Einzelantrieb angetriebener Zylinder
DE19803558A1 (de) * 1998-01-30 1999-08-12 Koenig & Bauer Ag Verfahren zur Ermittlung einer Winkellage eines ortsveränderbaren Zylinders einer Druckmaschine
DE10046367A1 (de) * 2000-09-20 2002-04-04 Koenig & Bauer Ag Antrieb einer Druckeinheit
DE102005029969A1 (de) * 2005-06-28 2007-01-11 Koenig & Bauer Ag Anordnung von Drehwinkelgebern

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430693B4 (de) * 1994-08-30 2005-12-22 Man Roland Druckmaschinen Ag Antriebe für eine Rollenrotations-Offsetdruckmaschine
DE10003107B4 (de) * 2000-01-25 2007-10-11 Maschinenfabrik Wifag Verfahren und Vorrichtung für einen Transport einer Bedruckstoffbahn zwischen Funktionseinheiten einer Rotationsdruckmaschine in besonderen Betriebssituationen
DE20220723U1 (de) * 2001-04-09 2004-02-12 Koenig & Bauer Ag Druckwerk einer Druckmaschine
DE10304495B4 (de) * 2003-02-05 2015-04-16 Koenig & Bauer Aktiengesellschaft Verfahren und Anordnung für die Synchronisierung eines elektrischen Einzelantriebes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614818A1 (de) * 1996-04-15 1997-10-16 Wifag Maschf Drehgeber für einen Zylinder einer Druckmaschine
DE19720952A1 (de) * 1997-05-17 1998-11-19 Roland Man Druckmasch Schwenkbarer, durch einen elektrischen Einzelantrieb angetriebener Zylinder
DE19803558A1 (de) * 1998-01-30 1999-08-12 Koenig & Bauer Ag Verfahren zur Ermittlung einer Winkellage eines ortsveränderbaren Zylinders einer Druckmaschine
US6327976B1 (en) * 1998-01-30 2001-12-11 Koenig & Bauer Aktiengesellschaft Method for detecting a rotation angle position of moveable cylinder of a printing machine
DE10046367A1 (de) * 2000-09-20 2002-04-04 Koenig & Bauer Ag Antrieb einer Druckeinheit
DE102005029969A1 (de) * 2005-06-28 2007-01-11 Koenig & Bauer Ag Anordnung von Drehwinkelgebern

Also Published As

Publication number Publication date
EP1974915A3 (fr) 2010-01-06
DE102007010289A1 (de) 2008-08-14

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