EP2069147B1 - Procédé de démarrage d'une rotative d'imprimerie à bobines - Google Patents

Procédé de démarrage d'une rotative d'imprimerie à bobines Download PDF

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Publication number
EP2069147B1
EP2069147B1 EP07820859A EP07820859A EP2069147B1 EP 2069147 B1 EP2069147 B1 EP 2069147B1 EP 07820859 A EP07820859 A EP 07820859A EP 07820859 A EP07820859 A EP 07820859A EP 2069147 B1 EP2069147 B1 EP 2069147B1
Authority
EP
European Patent Office
Prior art keywords
web
printing
speed
print
cylinder
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.)
Not-in-force
Application number
EP07820859A
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German (de)
English (en)
Other versions
EP2069147A2 (fr
Inventor
Daniel Burri
Thomas Zehnder
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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Publication of EP2069147A2 publication Critical patent/EP2069147A2/fr
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Publication of EP2069147B1 publication Critical patent/EP2069147B1/fr
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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
    • B41F33/04—Tripping devices or stop-motions
    • 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
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/08—Tripping devices or stop-motions for starting or stopping operation of cylinders
    • 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
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking 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
    • B41F33/16—Programming systems for automatic control of sequence of operations
    • 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 method for starting a web-fed rotary printing press and to a web-fed rotary printing machine having a control device configured for carrying out the method according to the invention.
  • the invention preferably finds use in offset printing, either in dry offset or more preferably in wet offset.
  • the printing machine may be, in particular, a newspaper printing press and, in particular, the printing of large newspaper editions.
  • the new web is fed by being withdrawn from a roll changer by means of a retractor, fed via one or more traction means and by one or more associated printing units and by a turning device and a longitudinal folding device to a folder.
  • the feeding takes place at least until the turning device automatically.
  • the driven components of the machine namely the reel splitter, the traction members for the web, the cylinders and rollers of the printing units and the folder, are synchronously accelerated. As long as no color is transferred to the web, so-called white waste arises at the start, then usually also waste ink.
  • the beats EP 1 232 862 A1 to set a specially adapted to start driving profile.
  • the DE 10 2004 051 635 A1 Reduces waste by means of targeted compensation for the cutting register error caused by acceleration processes.
  • the DE 100 57 051 A1 suggests for sheetfed printing that to start the press after washing a blanket the Blanket is pre-dyed.
  • the object of the invention is also related to a method for starting or restarting the printing in a sheet-fed printing machine in which the starting time for starting the printing press from a base speed to the production speed provided for the printing depends on the number of times a first stack of sheets has been fed Machine revolutions that are required up to a predetermined point are set in such a way that, after the sheet travel has been activated, a first sheet reaches the predetermined position within the machine only at or after reaching the production speed.
  • the printing material web 12 is guided through a printing nip, which is formed by a blanket cylinder 22 and a printing cylinder 26.
  • the blanket cylinder 22 is only partially covered in the circumferential direction with a blanket, that is, between two transferred from the blanket cylinder 22 on the web 12 images would be a relatively large unprinted area.
  • the web speed 12 is manipulated prior to its entry. This results in that the blanket cylinder 22 and the web 12 have alternately the same or different speeds, wherein at different speeds, the web speed is always smaller than the constant speed of rotation of the blanket cylinder 22. From the DE 100 14 535 A1 For example, a method of operating a web-fed rotary machine is known. Initially, the white unprinted web is passed through the printing machine at low speed with the printing units parked. When the printing web is running at the desired web tension, the printing units are switched to print on.
  • the invention relates to a method for starting a web-fed rotary printing press, in which a web to be printed is guided through at least one printing nip, which is formed by a printing cylinder and an impression cylinder of the web-fed rotary printing press.
  • a printing cylinder When starting the printing cylinder is accelerated in a parked position from the web to a print-on speed and turned on with pressure-on-speed rotating to the web. During acceleration, the printing cylinder is thus not yet in contact with the web.
  • the printing cylinder is preferably a blanket cylinder and may be in particular a blanket cylinder.
  • the counter-pressure cylinder can be a blanket cylinder in order to be able to print on both sides of the web during printing operation.
  • the impression cylinder is also accelerated in a parked position from the web to the print-on speed and turned on only with pressure-on speed rotating to the web.
  • the impression cylinder may also be a non-printing cylinder, for example a steel cylinder, and may in particular be a central cylinder of a satellite printing unit, for example a nine-cylinder or ten-cylinder printing unit, with a plurality of associated printing cylinders, preferably blanket cylinders.
  • the impression cylinder is not in color transfer, it may already be in contact with the web during acceleration to the print-on speed, as will be the case in particular if the impression cylinder is a central cylinder for multi-color transfer printing cylinders.
  • it is already printed at the print-on speed, in principle, however, the color transfer can be postponed until reaching an even higher speed.
  • the web is not accelerated in the start-up synchronously with the still parked printing cylinder, but only with a delay.
  • the train is stationary and is only accelerated when the Pressure cylinder has reached the pressure-on speed or a lower speed, which is preferably at least 50%, more preferably at least 80% of the pressure-on speed.
  • the web is conveyed at a significantly lower initial speed, preferably a constant initial speed, than the pressure-on speed through the still open pressure gap, while the pressure cylinder is already being accelerated.
  • the printing cylinder can be driven in an initial phase with a peripheral speed corresponding to the initial speed of the web.
  • the printing cylinder is raised to the print-on speed, while the web is preferably further promoted at the initial speed or also already accelerated continuously or in stages, but at least slower than the printing cylinder.
  • the initial speed may correspond to a pull-in speed with which the web is automatically drawn into the printing machine by means of a retraction device until at least one web tension means located downstream of the printing cylinder on the web path.
  • a web speed which corresponds to the pressure-on speed at least to the extent that no damage to the web is to be feared when adjusting the printing cylinder, is also understood as a print-on speed for the web in both variants.
  • the printing cylinder is assigned in preferred embodiments, a printing forme cylinder.
  • the associated printing form cylinder is used for imagewise transfer of color to the printing cylinder. If the impression cylinder also serves to transfer ink to the web, the impression cylinder is likewise assigned a printing plate cylinder for the image-wise transfer of color in the same way.
  • the printing cylinder is associated with an inking, by means of which the ink is applied to the printing cylinder.
  • the printing press as preferred is a wet offset printing press, the printing cylinder is also associated with a dampening unit for the transmission of moisture.
  • the printing cylinder as preferred associated with a printing plate cylinder, the color or the color and the moisture is first transferred to the printing form cylinder and from there to the printing cylinder.
  • the respective inking unit preferably comprises at least one inking roller, which is attached to the associated printing form cylinder or directly to the printing cylinder and can be turned off.
  • the printing cylinder is also assigned a dampening unit, this preferably comprises at least one dampening applicator roll, which is connected to the associated printing form cylinder or directly to and from the printing cylinder.
  • the inking roller and the optional dampening roller are advantageously offset from the associated printing form cylinder or printing cylinder.
  • the rollers of the inking unit and the optional dampening unit can therefore be accelerated separately from the impression cylinder and the optional plate cylinder and employed at a suitable selectable moment on the respective cylinder.
  • the optional dampening unit is started before the inking unit or the inking roller is turned on.
  • staggering i. the sequence when accelerating and hiring printing engine components are freely defined to the respectively assigned and closer to the web component.
  • the start-up phase can be extended, but nevertheless the white waste can be significantly reduced compared to the usual methods of starting.
  • the web is preferably already retracted before the start of the process, at least to the extent that it can be conveyed by means of a traction means or several traction means of the printing press through the still open pressure nip. More preferably, the web is already completely and thus drawn into a folder of the printing press before the start-up sequence according to the invention is driven by a machine control.
  • the components of the printing press serving for web promotion are stationary in the first process variant, and in the second process variant are driven in accordance with the initial speed of the web.
  • the initial speed is constant as long as the printing cylinder and preferably also the other components of the printing unit are accelerated to the printing on speed.
  • the train serving components form a web conveyor. These components may in particular be one or more draw rolls or comparable traction means and also the aforementioned folding apparatus and a driven roll changer.
  • the press has a controller that is arranged to drive the web-feed actuators to either stop these components at start-up or to drive them in line with the initial speed.
  • the controller is further configured to meanwhile accelerate the impression cylinder and other driven components of the print engine to the print on speed.
  • the web-conveying components are further controlled to accelerate the web to the print-on speed before the impression cylinder is turned on.
  • the web can already be accelerated during the acceleration of the printing unit components, but it is preferably accelerated only when the printing unit components have already reached the print-on speed. If the impression cylinder also prints on the web in the printing operation, the same applies to this and the other components which belong to the same printing unit as the counter-pressure cylinder, what is said for the impression cylinder and its associated components.
  • the operator can use a mask to parameterize the setting / shutdown sequence of the individual elements.
  • it can usually define a rotational speed at which the element (s), for example dampening unit, inking roller, grooved roller and / or dampening roller, starts / starts to move in the direction of pressure on.
  • the element for example dampening unit, inking roller, grooved roller and / or dampening roller.
  • Each of the elements has an individual travel time, that is, between the drive and the desired final state passes a real time, which can be up to 6 seconds or more. Therefore, it is particularly preferred if the controller is designed so that it calculates the predetermined Anstellzeittician for the element based on the known time between activation and employment, which is retrievable, for example, from a memory element of the control and controls the employment process that the Employment exactly at the given time X takes place. That is, if, for example, one of the elements requires a travel time of 2 seconds, then the controller drives that element at time X-2sec, for the job to pass exactly at time X.
  • the print-on speed at which the impression cylinder is applied to the web may be the printing press's printing speed. However, more preferably, the on-press speed is less than the print speed. For example, if the print speed is in the range of 40,000 to 50,000 rpm, or even higher, the print-on speed of setting may be in the range of 5,000 to 20,000 rpm, preferably in the range of 5,000 to 15,000 rpm , to get voted. If, as preferred, the printing cylinder is already coated with ink before painting on the web and is no longer accelerated until the color transfer begins, the printing also starts immediately when the ink is applied.
  • this initial velocity is preferably in the range between 200 U / h and 2,000 U / h, preferably at most 1000 U / h. All speed data are based on the peripheral speed of the pressure cylinder at the specified speed.
  • the web is passed through a plurality of printing gaps, which are each formed by a pair of a printing cylinder and a counter-pressure cylinder.
  • the cylinder pairs forming a printing gap can be arranged one above the other in a printing tower and each form an associated inking unit and optionally an associated dampening unit pressure bridges, for example pressure bridges in the form of a "V" or one upside down "V".
  • successive pressure-on is usually made, that is, in four superimposed printing works first the top bridge is turned on, two revolutions later the bridge below, again two turns later seen from above third bridge and after two revolutions later the lowest bridge, or vice versa.
  • a common counterpressure cylinder which forms a central cylinder, for example a nine or ten cylinder satellite pressure unit, can be provided for a plurality of pressure cylinders.
  • a non-ink-transferring impression cylinder can also be provided for each of the printing cylinders.
  • two color-transmitting printing cylinder can be assigned to a common impression cylinder, which in this case preferably also transfers color, wherein the two associated printing cylinder are changeable in the common counter-pressure cylinder.
  • the web can be printed in multiple colors in the several printing gaps.
  • the printing press has printing cylinders and impression cylinders for a plurality of webs, preferably for forming a plurality of printing gaps per web. Also for these other impression cylinders and counter-pressure cylinders and their associated components for the transfer of color and optional humidity the above applies only to a pair of cylinders with respect to the startup according to the invention.
  • the control device is set up in such developments that all components of the printing press required for the respective print production can be run up in the startup sequence according to the invention.
  • the acceleration of all printing engine components can be done synchronously, for example.
  • the components of the inking units as a second group and the components of the optional dampening units as a third group can each be synchronously accelerated with each other, wherein a synchronous acceleration from group to group , ie the group among each other, does not have to be done.
  • the invention grants Startup sequence, however, complete freedom in the way, in particular the sequence, the startup or adjustment of the printing engine components.
  • the rotational angle position (s) of the printing cylinder (s) is or are set to a cut register. If the impression cylinder (s) also print or print, the rotational angle position (s) of the impression cylinder (s) is or will also be set to the cut register. If printing on at least one side of the web or one of several webs in multiple colors, the printing or impression cylinder to be printed on the web page concerned are set relative to each other in the color register, d. H. the rotational angle positions of the respective cylinder must be adjusted not only on the common cut register, but also relative to each other to register-pressure.
  • the one or more printing and impression cylinder and the web are therefore brought to the common pressure-on speed at the start up to the time of Anstellens, and the rotational angular positions of the or the pressure and impression cylinder (s) are up to this point in the sense a register-containing cut and preferably multicolor pressure set relative to each other.
  • the rotational angular position of the printing cylinder is adjusted by accelerating the printing cylinder to a synchronizing speed lower than the printing-on speed, which is preferably close to the printing-on speed, but at least closer to the printing-on speed than is at the initial speed of the web.
  • the synchronization speed is preferably at least 80%, more preferably at least 90% of the print speed.
  • the printing cylinder is accelerated from the synchronizing speed to the printing-on speed.
  • the web is also accelerated to the print-on speed within the sync phase. Preferably, it is accelerated before the synchronization phase, and the acceleration is continued during the synchronization phase, preferably continuously.
  • the printing cylinder is accelerated in a first part phase of the synchronization phase on the synchronizing, preferably also on the pressure-on speed, and delayed in a subsequent second part phase again below the pressure-on speed to a speed at this time the train having.
  • this speed can again be the synchronization speed.
  • the second sub-phase is followed by a third sub-phase within which the web and the printing cylinder are accelerated together to the print-on speed.
  • the starting sequence namely the speed, the acceleration and the respective start and end time of acceleration of the web and the printing cylinder (s) and counter-pressure cylinder (s), until the synchronization phase in dependence on predetermined and preferably also measured speed values traveled .
  • the start and end times of accelerations are calculated by the controller only as a function of the speed values.
  • the adjustment of the rotational angle positions is carried out in preferred embodiments by means of detection of the rotational angular position of each printing or impression cylinder and comparison with a detected position of the web.
  • the detection is preferably carried out at the said synchronizing speed of the pressure and impression cylinder (s).
  • the detection is followed by the explained synchronization phase, within which the rotational angular position of each pressure and impression cylinder to be set is set on the basis of the detected rotational angular position (s) and the detected web position.
  • the time of employment can be calculated by means of the controller so that the first contact of the printing cylinder with the printing web is at the top, that is, the paper is first printed exactly at the top. Further, by means of the control, all pressure points can be controlled in such a way that the paper is first printed at the same place by all the pressure points, that is, the first printed page already has all the colors, there are no pages with only black, only black and yellow and so on. Since in this case the web tension plays an important role and has to be taken into account, it is particularly advantageous if the controller also undertakes the acquisition of data for determining the web tension. At a minimum, these values should be available to her when calculating the pressure-on.
  • the print-on times of a plurality of printing webs running within a printing press are determined by the controller in such a way that the paper is printed at the same place by all printing on all printing lines simultaneously, so come out of the folding machine at the end of the printing machine first white copies and then seamlessly printed copies, if that allows the collection in the turning tower.
  • FIG. 1 shows an offset web-fed rotary printing press with multiple printing towers, in each of which a web B of a printing material, preferably paper, is printed on both sides in four colors.
  • the webs unwind from reel splitter 1.
  • the printing towers, the paths of the webs B through the respective printing tower and the respectively associated reel splicer 1 are the same, so that representative of the others hereinafter only one of the webs B is referred to.
  • the web B unwinds from a roll which is received in the reel changer 1 for the web B.
  • the reel changer 1 accommodates two reels at the same time, namely the reel currently being unwound in the current production and another reel for an automatic change after the unwinding reel has been used up.
  • the web B is successively conveyed via a arranged at an inlet of the printing tower traction means 2 and arranged at an outlet of the printing tower traction means 7 by four on the way of the web B between the traction means 2 and 7 in the printing tower superimposed pressure column and thereby printed.
  • the printing units each comprise a printing cylinder 3, a printing form cylinder 4, a dampening unit 5 and an inking unit 6.
  • the dampening units 5 and inking units 6 each comprise a plurality of rollers, which are employed for the transport of moisture or color to each other.
  • a fountain roller upstream in the dampening solution flow roller and an inking roller upstream in ink flow can be set against the respective associated printing form cylinder 4 and can be shut off from the printing form cylinder 4.
  • the dampening rollers and the inking rollers are preferably independently of each other to the respective associated printing form cylinder 4 adjustable and off from this printing form cylinder 4.
  • the dampening units 5 and the inking units 6 can each be equipped with its own, independently operable by the other adjusting device, so that the sequence of arrival and Abstellens can be controlled purely by signal technology.
  • a common actuator per printing unit may be provided, wherein the dampening roller and the inking roller of the same printing unit are mechanically coupled together so that upon actuation of the actuator of the actuator, the actuator via the mechanical coupling both the dampening roller as well as the inking roller in a predetermined by the mechanical coupling sequence on and off.
  • the printing cylinders 3 of the same printing unit bridge each form one of the printing gaps for the web B. In a position employed on the web B, they roll on the web B and on the web B from each other. The printing cylinders 3 thus each form an impression cylinder for the other printing cylinder 3 of the same printing unit bridge.
  • each of the printing units has its own adjusting device with an actuator, preferably an electric motor, that via a mechanical coupling each associated printing cylinder 3 on and off. In the parked position, the web B can be conveyed free of the respectively parked pressure cylinder 3 through the then open pressure nip.
  • each of the printing units of the printing cylinder 3 can be made mechanically independent of the dampening unit 5 and the inking unit 6 to its impression cylinder 3 and parked by this.
  • the printing cylinder 3 and the associated dampening roller and the associated inking roller for switching on and off to mechanically couple with the same actuator and specify the desired sequence of switching on and off via the mechanical coupling.
  • the dampening roller and in a subsequent second step the inking roller to the printing form cylinder 4 employed before the printing cylinder 3 is employed in a third step to the impression cylinder 3 of the printing unit bridge.
  • a cylinder drive with a plurality of not mechanically, but only signal technically coupled motors is provided, each one of these motors only one of the pressure cylinder 3 drives.
  • the motor in question also drives the printing form cylinder 4 of the same printing unit.
  • Preferred drive concepts are in the EP 0 644 048 A2 described.
  • the printing cylinder 3 and the printing form cylinder 4 of each printing couple are mechanically coupled together.
  • the dampening units 5 and the inking units 6 can be mechanically coupled to the engine of the associated printing cylinder 3 and driven in tow one of the cylinders 3 and 4 of the respective printing unit, preferably in tow of the printing forme cylinder 4.
  • the dampening units 5 and the inking units 6 per Printing unit also be provided a common motor for the rotary drive during printing.
  • the web B is conveyed via the traction means 7 out of the printing tower and in the direction of a turning device 8.
  • a cutting device is arranged, by means of which the web B is cut longitudinally into a plurality of partial webs.
  • a cutting device for longitudinal cutting between the reel changer 1 and the next following on the web path following printing unit bridge can be arranged so that the web B is already printed longitudinally cut in partial webs. This can be advantageous in particular for wide printing presses, for example six-page wide printing presses. In the following, with regard to printing, only the web B is mentioned, the case of printing should be included on previously formed part webs.
  • the partial webs obtained by the longitudinal section are turned or swept in the turning device 8, brought together into a strand and conveyed by a longitudinal folding device 9, where the strand is folded longitudinally.
  • the longitudinal folding device 9 may in particular be a longitudinal folding funnel. If the printing presses preferably have a plurality of reelstands 1 and subordinate printing towers in the manner of the printing tower described in order to simultaneously print a plurality of webs, the sub-webs obtained from the plurality of webs by longitudinal section are turned or swept by means of the turning device 8 and in the direction of the following Longitudinal folding 9 merged.
  • the longitudinal folding device 9 may comprise a plurality of folding members, preferably former, in order to be able to form a plurality of longitudinally folded stitching strands from the component sheets.
  • partial webs printed in one of the printing towers can be merged with partial webs from another printing tower.
  • the longitudinally folded staple strands are conveyed to a folding apparatus 10 following the longitudinal folding device 9, cut transversely in the folding apparatus 10 and then folded transversely to individual printed copies.
  • the folder 10 puts the printed copies on a copy display 11, which removes the printed copies.
  • a web start of a new web B is unwound from the paster 1 on the traction means 2 and between the two printing cylinders 3 of the printing unit bridges and on the traction means 7 in the direction of Turning device 8 retracted.
  • the longitudinal cutting of the web B which is done between the draw roller 7 and the turning device 8 or before the printing tower or possibly also partially before the printing tower and partly only after the printing tower can, if a corresponding longitudinal cutting device is present, the partial webs are further drawn around the turning bars of the turning device 8, merged into a strand or multiple strands and pulled as a strand on the Lssensfalz Rhein 9 into the folder 10.
  • the web B or partial webs already formed therefrom prior to the respective printing tower are automatically drawn in at least up to the traction means 7 by means of a retraction device.
  • a longitudinal cutting device is arranged behind the printing tower, but before the turning device, the web B is preferably also automatically fed by the longitudinal cutting device by means of the retraction device.
  • the indentation in and through the turning device 8 can also be carried out automatically if it is provided for each of the partial webs of a retraction device, or the partial webs are drawn in by hand through the turning device 8.
  • the strand or strands formed from the partial webs and possibly also the sub-webs of further printing towers is or are drawn in through the longitudinal folding device 9 as far as the folding apparatus 10 and into this.
  • the cylinders 3 and 4 which are still preferably still stationary up to this point in time, as well as the dampening units 5 and inking units 6 are accelerated.
  • the web is conveyed by means of the specially provided for the rail transport funding, in particular by means of the traction means 2 and 7.
  • the web conveyors also include the roll changer 1 and the folder 10. These web conveyors 1, 2, 7 and 10 and optionally further on the web arranged web conveyors are driven synchronously, wherein the web conveying means, for example the traction means 2 and 7 at the inlet and at the outlet of the printing tower, are advantageously driven at slightly different speeds in order to set a desired web tension.
  • the printing cylinder 3 are employed against the web B and the dampening rollers and inking rollers against the respective associated printing form cylinder 4 in a predetermined start-up sequence.
  • FIG. 2 shows a start-up sequence in a speed-time diagram.
  • the speed is plotted as the rotational speed N of the printing cylinder 3.
  • the web conveying means 1, 2, 7 and 10 the cylinders 3 and 4 and the rollers of the dampening units and inking units 6 5 up to a draw-N accelerates A until a time t. 1
  • the web B if it has already been fully retracted, further promoted at the retraction speed N Ein or only fully retracted.
  • the driven components of the printing press are driven at a speed N A of the printing cylinder 3 corresponding speed.
  • the initial rate N A advantageously corresponds to a speed, having the impression cylinder 3 at a few hundred revolutions per hour at its periphery, for example, a peripheral speed at 300 U / hr to about 1000 U / h, at most 2000 U / h and preferably about 500 U /H. In the embodiment, it corresponds to the pull-in speed.
  • the pressure-on speed N pressure-on is preferably at least 5000 U / h of the pressure cylinder 3, but on the other hand, well below the speed of the continuous pressure. Typically, the print on speed is about 10,000 rpm. It should not exceed 20,000 U / h.
  • the web B is accelerated compared to the printing units 3, 4, 5, 6 only with a delay.
  • the driven components of the printing units After the driven components of the printing units have reached the print-on speed N Ein at the time t 3 , they are further driven at the constant print-on speed N print-on , the web B and the sub-webs formed therefrom run or run on the other hand, with the low initial speed N Ein continues through the machine.
  • the driven components of the printing units run free during this time, ie the bearings and gears are after Free running smoothly lubricated, and the speed of the components concerned has been set to the constant speed value N pressure-on .
  • the synchronously driven to the cylinders 3 and 4 dampening rollers and inking rollers are employed at the respective associated printing form cylinder 4.
  • the Anstellsequenz is basically arbitrary, but preferably first the dampening rollers and then only the inking rollers are employed. In any case, at a time t 5 , the driven components per printing unit and also the printing units run synchronously with one another at the speed N print-on .
  • the web B continues to be driven at the initial speed N Ein until a time t 4 , which is before the time t 5 .
  • the web B is accelerated, that is, the web conveying means 1, 2, 7 and 10 accelerates, preferably at a constant acceleration, as in the embodiment the same as the acceleration of the printing units in the time interval from t 2 until t 3 can be.
  • the web B is accelerated to the pressure-on speed N pressure-on .
  • the printing cylinder 3 which is still at the pressure-on speed N pressure-on , will contact the Rail B hired.
  • the hiring takes place at time t 5 and is marked in the diagram with "pressure on”.
  • the printing units not only free in the time interval between the beginning of the acceleration and the time "pressure-on", ie in the time interval from t 2 to t 5 and in particular in the time interval from t 3 to t 5 , but are also already with moisture and supplies paint, preferably so that with respect to the transport of moisture and color has established a state of equilibrium between the moisture reservoir and the printing cylinder 3 and the ink reservoir and the printing cylinder 3 each of the same printing unit.
  • the starting sequence is stored in a control device of the printing machine in the form of speed setpoints and acceleration setpoints.
  • the control unit calculates the start and end times of the acceleration phases measured speeds.
  • a "ground" as shown qualitatively for the change in acceleration at t 2 .
  • the Verschliffs arise inaccuracies in the rotational angle positions of the printing and impression cylinder. 3
  • FIG. 3 shows an advanced start-up sequence in which the rotational angle positions are set in a synchronizing phase.
  • the further developed start-up sequence corresponds to the startup sequence described up to time t 2 and also during most of the acceleration phase from t 2 to t 3 .
  • the printing units are not accelerated in this acceleration phase to the print-on speed N print-on , but only to a slightly lower synchronization speed N synch and held at the synchronizing speed N synch , while the web B with the initial speed N A on and off the time t 4 is accelerated with preferably constant acceleration to the pressure-on speed N Duck-An .
  • the path B corresponds to the startup sequence of FIG. 3 the startup sequence of FIG. 2 ,
  • the position of the web B and the rotational angular positions of the printing web are at a time t D shortly after the acceleration of the web B, ie shortly after the time t 4 . and counter-pressure cylinder 3 or the plate cylinder 4 detected and compared.
  • the cylinders 3 and 4 rotate at the time t D at the constant synchronizing speed N Synch .
  • the rotational angle positions are set on the basis of the comparison in the subsequent to the time t D synchronization phase.
  • the web B assumes the function of a leading axis for its associated printing and impression cylinder 3.
  • the synchronization phase is divided into several sub-phases.
  • the cylinders 3 are accelerated to a Tarhol Anthony N Aufuol , which is preferably greater than the pressure-on speed N pressure-on .
  • the cylinder 3 reaches the catch-up speed N catch , they are delayed from a time t 5 in a second sub-phase to the instantaneous speed of the web B, preferably back to the Synchronizing speed N Synch .
  • N Synch the Synchronizing speed N Synch
  • the web B and the printing units have reached the print-on speed N print-on and are stabilized at this speed before the print engine as a whole continues to accelerate until finally the speed of the print run is reached.
  • the control device calculates the time t 6 at which the web B reaches the synchronizing speed.
  • the calculation is performed in the phase in which the web B A is accelerated starting from the initial speed N, either before or immediately after the detection of the actual positions of the train B and the cylinder 3.
  • the controller further calculates on the basis of the Time t D detected positions of the web B and the cylinder 3, the actual rotational angle positions, which the cylinders 3 at time t 6 einappelhmn if they would continue to rotate constantly with the synchronization speed N Synch . From the detected position of the web B results for each of the cylinder 3 for the time t 7, a rotational angle target position.
  • the per cylinder 3 individual deviation of the angle of rotation actual position of the rotational angle command position is compensated for by "catch up" by the cylinder 3 and the respective associated components 4, 5 and 6 in the two component phases of t D to t 5, and t 5 to t 6 from the synchronization speed N synch to the catch-up speed N catch- up accelerated and delayed again to the synchronization speed N synch .
  • the first and the second subphase are the same length.
  • the control device is signal technology with the adjusting devices of the printing units, in particular with the adjusting device for turning on and off the impression cylinder 3, and the Drive devices, namely the cylinder drives and optionally further drives the printing units and the drives of the web conveyor, in particular with a traction mechanism for the traction means 2 and a traction mechanism for the traction means 3, a drive for the folder 10 and a drive for the reel splitter 1 connected to control the actuators and drives according to the starting sequence, each with a reference variable.
  • the start-up sequence is, as explained by way of example, preferably traversed in speed levels. In a memory of the control device, the respective starting speed and the respective end speed are stored per acceleration phase. In the simple start-up sequence of FIG.
  • the speeds N A and N print-on are in particular stored.
  • the speeds N Synch and N catch are additionally stored.
  • the accelerations for the individual acceleration phases are predetermined as setpoints, preferably each as a fixed setpoint value per phase.
  • the times t i and in the further developed embodiment also the time t D are preferably calculated as a function of representative measured values, ie detected speeds and positions.
  • the adjustment of the rotational angle positions is carried out by comparison with the detected web position.
  • the rotational angle positions of the printing cylinder 3 or printing form cylinder 4 can also be adjusted on the basis of a comparison with a detected rotational angular position of a guide axis of the printing press, for example the axis of a cylinder of the folding apparatus 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (19)

  1. Procédé pour démarrer une rotative d'imprimerie à bobines, comportant les étapes consistant à :
    a) guider une bande (B) à imprimer à travers au moins un espace d'impression formé par un cylindre d'impression (3) et un contre-cylindre d'impression (3) de la rotative d'imprimerie à bobines,
    b) accélérer le cylindre d'impression (3) jusqu'à une vitesse d'impression (NDruck-An) dans une position rétractée par rapport à la bande (B) et appliquer le cylindre d'impression (3) sur la bande (B),
    c) arrêter la bande (B) au moins pendant une phase partielle de l'accélération du cylindre d'impression (3) ou la transporter à une vitesse initiale (Nein) inférieure à la vitesse instantanée du cylindre d'impression (3).
  2. Procédé selon la revendication 1, dans lequel la bande (B) est accélérée jusqu'à la vitesse d'impression (NDruck-An) alors que le cylindre d'impression (3) est encore dans la position rétractée, et le cylindre d'impression (3) n'est appliqué sur la bande (B) qu'une fois que la bande (B) a atteint la vitesse d'impression (NDruck-An).
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel le cylindre d'impression (3) est accéléré jusqu'à une vitesse de synchronisation (NSynch) qui correspond au moins sensiblement à la vitesse d'impression (NDruck-An), et la bande (B) n'est accélérée à partir de l'arrêt ou de la vitesse initiale (Nein) qu'une fois que le cylindre d'impression (3) a atteint la vitesse de synchronisation (NSynch).
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel le cylindre d'impression (3) est accéléré uniquement sur la base d'un profil de vitesse prédéfini, jusqu'à une vitesse de synchronisation (NSynch) qui correspond au moins sensiblement à la vitesse d'impression (NDruck-An).
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel une position de la bande (B) et une position angulaire de rotation du cylindre d'impression (3) sont détectées au moyen d'un dispositif capteur, et la position angulaire de rotation du cylindre d'impression (3) est réglée en fonction de la position détectée de la bande (B).
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel
    - le cylindre d'impression (3) est accéléré jusqu'à une vitesse de synchronisation (NSynch) qui correspond au moins sensiblement à la vitesse d'impression (NDruck-An), de préférence au moins égale à 80 % de la vitesse d'impression (NDruck-An),
    - la bande (B) est accélérée jusqu'à la vitesse de synchronisation (NSynch),
    - la bande (B) et le cylindre d'impression (3) sont conjointement accélérés de la vitesse de synchronisation (NSynch) à la vitesse d'impression (NDruck-An),
    - une position angulaire de rotation du cylindre d'impression (3) est réglée par rapport à une position de la bande (B) pendant l'accélération commune, la position angulaire de rotation et la position de la bande (B) étant de préférence détectées,
    - et le cylindre d'impression (3) réglé dans sa position angulaire de rotation est appliqué sur la bande (B) à la vitesse d'impression (NDruck-An).
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel
    - le cylindre d'impression (3) est accéléré jusqu'à une vitesse de synchronisation (NSynch) qui correspond au moins sensiblement à la vitesse d'impression (NDruck-An),
    - le cylindre d'impression (3) est accéléré de la vitesse de synchronisation (NSynch) à une vitesse de rattrapage (NAufhol) avant l'application sur la bande (B), et la bande (B) est accélérée jusqu'à une vitesse de bande augmentée (NSynch), de préférence la vitesse de synchronisation (NSynch),
    - le cylindre d'impression (3) est retardé de la vitesse de rattrapage (NAufhol) à la vitesse de bande augmentée (NSynch),
    - et une position angulaire de rotation du cylindre d'impression (3) pendant la phase d'accélération jusqu'à la vitesse de rattrapage (NAufhol) et le retardement jusqu'à la vitesse de bande augmentée (NSynch) est réglée par rapport à une position de la bande (B), la position angulaire de rotation et la position de la bande (B) étant de préférence détectées.
  8. Procédé selon l'une quelconque des trois revendications précédentes, dans lequel la position angulaire de rotation à la vitesse de synchronisation (NSynch) du cylindre d'impression (3) et la position de la bande (B) sont de préférence détectées pendant l'accélération de la bande (B) jusqu'à la vitesse de synchronisation (NSynch), de préférence simultanément.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel la vitesse initiale (NEin) de la bande (B) correspond au moins sensiblement à une vitesse de rentrée pour une rentrée automatique de la bande (B), ou à une vitesse de réglage pour la synchronisation des cylindres (3, 4) et des rouleaux (5, 6) de la rotative d'imprimerie à bobines requis pour l'impression.
  10. Procédé selon l'une quelconque des revendications précédentes et au moins une quelconque des caractéristiques suivantes :
    i) la vitesse d'impression (NDruck-An) est au moins cinq fois, de préférence au moins dix fois aussi grande que la vitesse initiale (NEin),
    ii) la vitesse d'impression (NDruck-An) correspond au moins à une vitesse circonférentielle du cylindre d'impression (3) que le cylindre d'impression (3) a à 5 000 tours par heure sur sa circonférence extérieure en contact avec la bande (B) pendant l'impression.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel
    - le contre-cylindre d'impression (3) est accéléré jusqu'à la vitesse d'impression (NDruck-An) dans une position rétractée par rapport à la bande (B), et n'est appliqué sur la bande (B) que lorsque la vitesse d'impression (NDruck-An) est atteinte,
    - et la bande (B) est à l'arrêt au moins pendant une phase partielle de l'accélération du contre-cylindre d'impression (3), ou est transportée à travers l'espace d'impression à la vitesse initiale (NEin).
  12. Procédé selon l'une quelconque des revendications précédentes et au moins une quelconque des caractéristiques suivantes :
    (i) avant l'application sur la bande (B), un rouleau applicateur d'encre (6) associé au cylindre d'impression (3) est accéléré et n'est appliqué sur le cylindre d'impression (3) ou de préférence sur un cylindre de forme d'impression (4) associé au cylindre d'impression (3) qu'après l'accélération, de préférence après l'accélération jusqu'à la vitesse d'impression (NDruck-An),
    (ii) avant l'application sur la bande (B), un rouleau applicateur d'humidité (5) associé au cylindre d'impression (3) est accéléré, et n'appliqué sur le cylindre d'impression (3) ou de préférence sur un cylindre de forme d'impression (4) associé au cylindre d'impression (3) qu'après l'accélération, de préférence après l'accélération jusqu'à la vitesse d'impression (NDruck-An).
  13. Procédé selon l'une quelconque des revendications précédentes, dans lequel avant l'application sur la bande (B), de l'encre et de préférence également de l'humidité sont transférées sur le cylindre d'impression (3), et le cylindre d'impression (3) n'est de préférence appliqué sur la bande (B) qu'une fois qu'un état d'équilibre entre l'encre retirée et l'encre distribuée a été réglé en ce qui concerne le transfert d'encre entre le cylindre d'impression (3) et un dispositif d'encrage (6) associé.
  14. Procédé selon l'une quelconque des revendications précédentes, dans lequel la bande (B) est guidée consécutivement à travers plusieurs espaces d'impression qui sont chacun formés d'un cylindre d'impression (3) et d'un contre-cylindre d'impression (3), et le cylindre d'impression (3) et de préférence également le contre-cylindre d'impression (3) sont entraînés selon l'une quelconque des revendications précédentes.
  15. Procédé selon l'une quelconque des revendications précédentes, dans lequel
    - plusieurs bandes (B) sont chacune guidées à travers au moins un espace d'impression formé, pour chaque bande (B), par une paire constituée d'un cylindre d'impression (3) et d'un contre-cylindre d'impression (3), associée à la bande (B) respective,
    - les cylindres d'impression (3) sont chacun accélérés jusqu'à la vitesse d'impression (NDruck-An) dans une position rétractée par rapport à la bande (B) associée, et sont appliqués sur la bande (B) associée pour une impression,
    - et au moins pendant une phase partielle de l'accélération du cylindre d'impression (3) associé, chacune des bandes (B) est à l'arrêt ou est transportée avec une vitesse initiale (NEin) inférieure à la vitesse instantanée du cylindre d'impression (3) associé.
  16. Presse rotative à bobines, comportant
    a) un cylindre d'impression (3) et un contre-cylindre d'impression (3) formant avec le cylindre d'impression (3) un espace d'impression pour une impression sur une bande (B),
    b) un dispositif d'actionnement au moyen duquel au moins le cylindre d'impression (3) peut être appliqué sur la bande (B) et être rétracté par rapport à la bande (B),
    c) un mécanisme d'entraînement de cylindres pour le cylindre d'impression (3) et le contre-cylindre d'impression (3),
    d) au moins des moyens de traction (2, 7) pour la bande (B),
    e) un mécanisme d'entraînement de moyens de traction pour les au moins un moyen de traction (2, 7),
    f) et un dispositif de commande pour le dispositif d'actionnement, le mécanisme d'entraînement de cylindres et le mécanisme d'entraînement de moyens de traction,
    g) dans laquelle le dispositif de commande est configuré de telle sorte qu'il actionne le dispositif d'actionnement en utilisant un signal de commande lors d'un démarrage de la rotative d'imprimeries à bobines et qu'il actionne le mécanisme d'entraînement de cylindres et le mécanisme d'entraînement de moyens de traction, respectivement, en utilisant une vitesse nominale en tant que grandeur de consigne, de sorte que le cylindre d'impression (3) est accéléré jusqu'à une vitesse d'impression (NDruck-An) dans une position rétractée par rapport à la bande (B), et la bande (B) est à l'arrêt au moins pendant une phase partielle de l'accélération du cylindre d'impression (3), ou est transportée à une vitesse initiale (NEin) inférieure à la vitesse instantanée du cylindre d'impression (3).
  17. Presse rotative à bobines selon la revendication précédente, caractérisée en ce que la rotative comporte un appareil de pliage (10) ayant son propre mécanisme d'entraînement, et le dispositif de commande est configuré de telle sorte qu'il actionne le mécanisme d'entraînement de l'appareil de pliage (10) pendant le démarrage en utilisant une vitesse nominale en tant que grandeur de consigne qui correspond à la vitesse de la bande (B).
  18. Rotative d'imprimerie à bobines selon l'une quelconque des deux revendications précédentes, caractérisée en ce que
    - la rotative comporte un dispositif d'encrage (6) associé au cylindre d'impression (3) avec un rouleau applicateur d'encre, un dispositif d'actionnement pour le rouleau applicateur d'encre et un mécanisme d'entraînement du dispositif d'encrage (6), dans laquelle le mécanisme d'entraînement de cylindres peut former le mécanisme d'entraînement du dispositif d'encrage (6), et le rouleau applicateur d'encre peut être appliqué sur le cylindre d'impression (3) ou un cylindre de forme d'impression (4) associé au cylindre d'impression (3) au moyen du dispositif d'actionnement, et peut se rétracter par rapport au cylindre d'impression (3) ou au cylindre de forme d'impression (4) associé,
    - et le dispositif de commande est configuré de telle sorte qu'il actionne le dispositif d'actionnement pour le rouleau applicateur d'encre en utilisant un signal d'actionnement lors d'un démarrage de la rotative d'imprimerie à bobines et qu'il actionne le mécanisme d'entraînement du dispositif d'encrage (6) en utilisant une vitesse nominale en tant que grandeur de consigne, de sorte que le dispositif d'encrage (6) est accéléré jusqu'à la vitesse de synchronisation (NSynch) alors que le cylindre d'impression (3) est encore rétracté par rapport à la bande (B), et le rouleau applicateur d'encre n'est de préférence appliqué sur le cylindre d'impression (3) ou le cylindre de forme d'impression (4) associé qu'après l'accélération du dispositif d'encrage (6) jusqu'à la vitesse d'impression (NDruck-An).
  19. Rotative d'imprimerie à bobines selon l'une quelconque des trois revendications précédentes, caractérisée en ce que
    - la presse comporte un dispositif de mouillage (5) associé au cylindre d'impression (3) avec un rouleau applicateur d'humidité, un dispositif d'actionnement pour le rouleau applicateur d'humidité et un mécanisme d'entraînement du dispositif de mouillage (5), dans laquelle le mécanisme d'entraînement de cylindres peut former le mécanisme d'entraînement de dispositif de mouillage (5), et le rouleau applicateur d'humidité peut être appliqué sur le cylindre d'impression (3) ou un cylindre de forme d'impression (4) associé au cylindre d'impression (3) au moyen du dispositif d'actionnement, et peut se rétracter par rapport au cylindre d'impression (3) ou au cylindre de forme d'impression (4) associé,
    - et le dispositif de commande est configuré de telle sorte qu'il actionne le dispositif d'actionnement pour le rouleau applicateur d'humidité en utilisant un signal d'actionnement lors d'un démarrage de la presse rotative à bobines, et qu'il actionne le mécanisme d'entraînement du dispositif de mouillage (5) en utilisant une vitesse nominale en tant que grandeur de consigne, de sorte que le dispositif de mouillage (5) est accéléré jusqu'à la vitesse d'impression (NDruck-An) alors que le cylindre d'impression (3) est encore rétracté par rapport à la bande (B), et le rouleau applicateur d'humidité n'est de préférence appliqué sur le cylindre d'impression (3) ou le cylindre de forme d'impression (4) associé qu'après l'accélération du dispositif de mouillage (5) jusqu'à la vitesse d'impression (NDruck-An).
EP07820859A 2006-10-04 2007-10-02 Procédé de démarrage d'une rotative d'imprimerie à bobines Not-in-force EP2069147B1 (fr)

Applications Claiming Priority (2)

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DE102006046894A DE102006046894B4 (de) 2006-10-04 2006-10-04 Verfahren zum Anfahren einer Rollenrotationsdruckmaschine
PCT/EP2007/060478 WO2008040742A2 (fr) 2006-10-04 2007-10-02 Procédé de démarrage d'une rotative d'imprimerie à bobines

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EP2069147B1 true EP2069147B1 (fr) 2010-12-15

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EP2253470B1 (fr) 2009-05-18 2013-02-27 Flooring Technologies Ltd. Procédé et dispositif d'impression d'un décor sur une surface
US20120090485A1 (en) * 2009-06-25 2012-04-19 Mitsubishi Heavy Industries Printing & Packaging Machinery, Ltd, Lateral register correcting device, printing press, and lateral register correcting method
DE102009029058A1 (de) * 2009-09-01 2011-03-03 Manroland Ag Verfahren zum Voreinfärben mindestens eines Offset-Druckwerks einer Rollendruckmaschine
FR2980737B1 (fr) * 2011-09-29 2013-10-25 Goss Systemes Graphiques Nantes Tour d'impression pour presse rotative offset
JP7109392B2 (ja) * 2019-02-28 2022-07-29 三菱重工機械システム株式会社 印刷機の制御装置および方法並びに印刷機

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DE3825145A1 (de) * 1988-07-23 1990-01-25 Koenig & Bauer Ag Rollenrotations-offsetdruckmaschine mit einem druckwerk fuer fliegenden plattenwechsel
DE59410108D1 (de) * 1993-12-29 2002-05-23 Wifag Maschf Rotationsdruckmaschine
DE19639134C2 (de) * 1996-09-24 1999-03-25 Roland Man Druckmasch Verfahren zum Anfahren/Wiederanfahren des Fortdruckes
EP0882587B1 (fr) * 1997-06-02 2003-07-23 Maschinenfabrik Wifag Contrôle du repérage des cylindres dans une machine à imprimer rotative pour bandes
US6651556B2 (en) * 1999-04-30 2003-11-25 Heidelberger Druckmaschinen Ag Dual-web offset printing press and method for printing dual webs
JP3251270B2 (ja) * 1999-11-15 2002-01-28 株式会社東京機械製作所 輪転機の同期制御装置
DE10057051B4 (de) * 1999-12-06 2011-03-10 Heidelberger Druckmaschinen Ag Verfahren zum Anfahren einer Druckmaschine
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AU2002213797A1 (en) * 2000-09-20 2002-04-02 Koenig And Bauer Aktiengesellschaft Printing unit
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DE502007005983D1 (de) 2011-01-27
EP2069147A2 (fr) 2009-06-17
DE102006046894B4 (de) 2010-05-27
ATE491571T1 (de) 2011-01-15
DE102006046894A1 (de) 2008-04-10
WO2008040742A3 (fr) 2008-07-17
WO2008040742A2 (fr) 2008-04-10
US20100083854A1 (en) 2010-04-08

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