EP2017079A2 - Procédé pour faire fonctionner a machine d'impression de feuilles - Google Patents

Procédé pour faire fonctionner a machine d'impression de feuilles Download PDF

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Publication number
EP2017079A2
EP2017079A2 EP08009316A EP08009316A EP2017079A2 EP 2017079 A2 EP2017079 A2 EP 2017079A2 EP 08009316 A EP08009316 A EP 08009316A EP 08009316 A EP08009316 A EP 08009316A EP 2017079 A2 EP2017079 A2 EP 2017079A2
Authority
EP
European Patent Office
Prior art keywords
sheet
fed
printing
press
speed
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Withdrawn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
EP08009316A
Other languages
German (de)
English (en)
Other versions
EP2017079A3 (fr
Inventor
Hubert Dipl.-Ing. Hofmann
Horst Dipl.-Ing. Klingler
Klaus Dipl.-Ing. Schwinn
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 EP2017079A2 publication Critical patent/EP2017079A2/fr
Publication of EP2017079A3 publication Critical patent/EP2017079A3/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Withdrawn legal-status Critical Current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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0009—Central control units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/06—Tripping devices or stop-motions for starting or stopping operation of sheet or web feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/16—Programming systems for automatic control of sequence of operations

Definitions

  • the invention relates to a method for operating a sheet-fed printing press according to the preamble of claim 1.
  • a sheet-fed press has a feeder, a jib and a plurality of printing units positioned between the feeder and the jib and optionally coating units. Sheets are fed into the sheetfed press for printing from the feeder and moved successively through the printing units. After the printing process, the press sheets are fed from the printing units to a delivery unit of the sheetfed press. The larger the number of colors or the production possibilities of the sheet-fed printing machine should be, the greater the number of printing units between the feeder and the boom.
  • the sheet-fed printing machine usually has a so-called missing sheet monitoring, wherein a missing sheet is to be understood as a sheet that deviates from a correct sheet with regard to at least one property.
  • a missing sheet can be, for example, double or multiple sheets, as well as early, late or oblique sheets.
  • stopper the printing machine shut down or at least the printing process is interrupted.
  • stoppers can also be triggered by other causes.
  • the procedure is such that disengaged after occurrence of a stopper of the feeder and the printing position of the printing units with the last sheet in the printing units sequentially or sequentially turned off, the sheet-fed press here with a constant speed is operated. In this way, the stopper of the sheet-fed press can be eliminated while minimizing waste.
  • the present invention is based on the problem to provide a novel method for operating a sheet-fed press.
  • the speed of the sheet-fed press and the transfer of the printing units are influenced in a Druckabritt depending on the number of printing units of the sheet-fed press and depending on the number of fed before the occurrence of a stopper sheetfed printing sheet to the lowest possible number of spoil sheets for conveying of the last sheet and thus minimize the time required to clear the stopper.
  • the number of rotations of the sheet-fed press is increased to convey the sheets and the printing units are spontaneously transferred to the print-off simultaneously .
  • the speed of the sheet-fed printing press is kept constant for discharging the sheet and the printing units are not controlled spontaneously but successively transferred to the print-off.
  • the present invention relates to a method for operating a sheet-fed printing machine, wherein a sheet-fed printing machine comprises a feeder, a boom and a plurality of printing units positioned between the feeder and the boom and optionally coating units.
  • the invention relates to a method for conveying printed sheets out of the sheet-fed printing press after the occurrence of a stopper, wherein a stopper can be triggered by missing sheets, for example double or multiple sheets or also by early, late or oblique sheets.
  • the feeder is disengaged and the printing units are transferred to a print-off mode.
  • the print shutdown is not spontaneous, but controlled sequentially.
  • the sheet-fed press is operated at a constant speed, which corresponds to the speed at which the stopper has occurred.
  • the investor is coupled again and the printing units are then transferred to a pressure setting, wherein the coupling of the investor takes place at a basic speed of the sheet-fed press and this must optionally be converted to the base speed.
  • Fig. 1 visualizes the method known from practice for the case that on a sheetfed press production is started from a basic speed n G , wherein at time 1, a first good sheet is detected in the investor, and wherein at time 2, a missing sheet in the Investor is detected.
  • the sheet-fed printing press is still operated at a rotational speed corresponding to the base speed n G , so that the sheet-fed printing machine is further operated at this speed for discharging the missing sheet until the sheet 3 has been ejected from the sheet-fed printing press.
  • the feeder is uncoupled, so that no new sheets are fed into the sheet-fed press.
  • the printing units are not spontaneously, but successively controlled converted into a print-off.
  • the starting of the production process is then re-initiated on the sheet-fed printing machine, wherein at the time 1 'a first good sheet is detected in the investor, and wherein at time 4, a first good sheet arrives at the boom of the sheet-fed press. Following this will be the speed of the sheet-fed printing machine increased from the basic speed n G to the production speed n P.
  • the period of time .DELTA.T between times 2 and 3 is required in order to remove printed sheets from the sheet-fed printing press when a missing sheet occurs in the area of the feeder and thus after the occurrence of a stopper.
  • This time span can be unacceptably long for printing presses with a large number of printing units and possibly coating units, in particular in the event that a stopper occurs when the speed of the sheet-fed press corresponds to the basic speed n G.
  • Fig. 2 illustrates the inventive method for conveying sheet from a sheetfed press after the occurrence of a stopper, which is triggered for example by a missing sheet in the investor, in the sense of the present invention depending on the number of printing units of the sheet-fed press and depending on the number of before Occurrence of the stopper fed into the sheet-fed printing press sheet, the speed of the sheet-fed press and the transfer of the printing units is influenced in a print shutdown to minimize the time required to convey the missing sheet with minimal waste paper.
  • the speed of the sheet-fed press increases to convey the sheets when the feeder is uncoupled and the printing units become larger spontaneously or all at the same time transferred to the print-off.
  • the production process can be restarted, for which purpose the investor is coupled at the base speed n G and after detection of the first good sheet in the boom at time 4, the speed of the sheet-fed press is increased to the production speed n P.
  • the time interval ⁇ T between times 2 and 3 can be significantly reduced compared with the prior art.
  • the inventive method is particularly applicable when the number of printing units of the sheet-fed press is large and the number of printed sheets fed into the sheet-fed press prior to the occurrence of the stopper is small. Under these conditions, the speed of the sheet-fed press is small and corresponds approximately to the basic speed n G.
  • the described case occurs in particular at the beginning of a printing process and the associated work to set up at the printing press. This work is associated with frequent interruptions of the printing process.
  • the speed of the sheet-fed printing press is preferably kept constant for discharging the sheet and the printing units are not spontaneous, but instead controlled successively transferred to the print-off. Then, when the number of printing units of the sheet-fed press is small, the time gain by raising the production speed is too small. Then, if the number of printed sheets fed into the sheet-fed press prior to the occurrence of the stopper is large, too much waste would be generated in the case of spontaneous transfer of the printing units to the printing stop and when the rotational speed of the printing press is increased.
  • the unit settings of the printing units are to be considered. This applies in particular to the case when the speed of the sheet-fed printing press is increased to production speed at a large number of printing units and a small number of supplied before the occurrence of the stopper sheet for conveying the sheet, and the printing units are spontaneously or all simultaneously transferred to the print-off , In this state, startup sequences for inking units and dampening units of the printing units are preferably also reset.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP08009316A 2007-07-14 2008-05-21 Procédé pour faire fonctionner a machine d'impression de feuilles Withdrawn EP2017079A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710032922 DE102007032922B4 (de) 2007-07-14 2007-07-14 Verfahren zum Betreiben einer Bogendruckmaschine

Publications (2)

Publication Number Publication Date
EP2017079A2 true EP2017079A2 (fr) 2009-01-21
EP2017079A3 EP2017079A3 (fr) 2011-08-24

Family

ID=39590768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08009316A Withdrawn EP2017079A3 (fr) 2007-07-14 2008-05-21 Procédé pour faire fonctionner a machine d'impression de feuilles

Country Status (3)

Country Link
EP (1) EP2017079A3 (fr)
JP (1) JP2009018584A (fr)
DE (1) DE102007032922B4 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013106C1 (fr) * 1990-04-25 1991-12-12 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4407632C2 (de) * 1994-03-08 1996-06-20 Roland Man Druckmasch Verfahren zur Vermeidung von Makulatur während des Betriebs einer Bogenoffsetdruckmaschine
DE4407631C1 (de) * 1994-03-08 1995-10-19 Roland Man Druckmasch Verfahren zum Anfahren/Wiederanfahren des Fortdrucks bei einer bogenverarbeitenden Druckmaschine, insbesondere Bogenoffsetdruckmaschine
DE19505560C2 (de) * 1995-02-18 1998-07-02 Roland Man Druckmasch Verfahren zum Steuern der Bogenzufuhr
DE19510082C2 (de) * 1995-03-20 1997-07-17 Roland Man Druckmasch Verfahren und Vorrichtung zur Steuerung der Bogenzufuhr bei einer bogenverarbeitenden Offsetdruckmaschine
DE10011019A1 (de) * 2000-03-07 2001-09-13 Koenig & Bauer Ag Einrichtung zum Maschinenschutz

Also Published As

Publication number Publication date
JP2009018584A (ja) 2009-01-29
DE102007032922A1 (de) 2009-01-15
EP2017079A3 (fr) 2011-08-24
DE102007032922B4 (de) 2015-05-07

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