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, the so-called white-waste is produced when starting, then usually also waste ink.
• EP 1 232 862 A1 proposes setting a travel profile that has been specially adapted for starting.
• DE 10 2004 051 635 A1 reduces paper waste by a targeted compensation of the cutting register error caused by acceleration processes.
• DE 100 57 051 Al proposes for sheetfed printing that for starting the printing press after washing a blanket the Blanket is pre-dyed.
• EP 0 830 943 A2 also relates to a method for starting or restarting the continuous printing in a sheet-fed printing machine in which the time for starting the startup of the printing press from a base speed to the production speed provided for the printing depends on the number of conveyors a first sheet from a feeder pile to a predetermined point necessary machine revolutions is placed so that after switching the sheet running 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 the same or different speeds alternately, wherein at different speeds, the web speed is always smaller than the constant speed of rotation of the blanket cylinder 22. From DE 100 14 535 Al is a method for operating a web-fed rotary machine known.
• the white unprinted web is passed through the printing machine at low speed with the printing units parked.
• the printing web is running at the desired web tension, the printing units are switched to print on. It is an object of the invention to provide a method which can reduce the waste that results from starting up a web-fed rotary printing press and to provide a web-fed rotary printing press to which this method can be applied.
• 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 pressure-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 assigned 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.
• start-up sequence staggering, i. the sequence when accelerating and hiring printing engine components are freely defined to the respectively assigned and closer to the web component.
• 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 machine before the erfmdungsdorfe start-up sequence 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 control device is further arranged to accelerate the printing cylinder and other driven components of the printing unit to the printing on-speed while.
• 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. More preferably, however, the press speed of the press is less than the press 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".
• printing succession is usually made in succession, that is, in four superimposed printing works first the top bridge is turned on, two turns later the underlying bridge, again two turns later seen from above third bridge and after two turns 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 cylinder and counter-pressure cylinder and their associated components for the transmission of color and optional humidity the above applies only to a pair of cylinders with respect to the inventive startup applies.
• 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 cylinders must be set not only on the common cutting register, but also relative to each other on register-holding 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 section and preferably set multicolor pressure 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 speed, but in any case closer to the print-on speed than the Initial speed of the train is.
• 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 impression cylinder is accelerated in a first part phase of the synchronization phase via the synchronization speed, preferably also via the print on speed, and in a subsequent second part phase is again delayed below the print speed to a speed which at that time is the path having. In particular, 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 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 a web-fed rotary printing press
• FIG. 2 shows a method according to the invention in a speed-time
• Diagram and Figure 3 is a further development of the inventive method.
• FIG. 1 shows an offset web-fed rotary printing press with a plurality of printing towers, in each of which one web B of a printing material, preferably paper, is printed in four colors on both sides.
• 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.
• four printing units are arranged one above the other on both sides of the web B.
• Two of the printing units each form a printing unit bridge.
• 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. Seen from the contact gap between the printing form cylinder 4 and the impression cylinder 3, contacted the dampening roller of the respective printing unit the printing form cylinder 4 seen in the direction of rotation in front of the inking roller of the same printing unit, so that the moisture at each revolution of the plate cylinder 4 before the ink on the plate cylinder 4 arrived.
• 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 is provided with a plurality of not mechanically, but only signal technically coupled to each other motors, 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 described in EP 0 644 048 A2.
• 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 pressing.
• 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 can cut a cutting device for longitudinal also be arranged between the reel changer 1 and the following on the web path following printing unit bridge, 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. If in the following with regard to the pressing only of the web B is mentioned, the case of pressing should be included on previously formed partial 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.
• 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.
• N EI ⁇ drawing-in speed
• the driven components of the printing press are driven at a speed corresponding to the speed N EI ⁇ of the printing cylinder 3.
• the printing form cylinder 4 and the rollers of the dampening units 5 and 6 inking units 6 from a time t 2 to a time t 3 to a pressure-on speed Nomck-An accelerates, preferably with constant acceleration.
• the web B is conveyed at a significantly lower initial speed N EI ⁇ compared with the pressure-on-speed Nomck-An.
• the initial speed N EI ⁇ advantageously corresponds to a speed which the printing cylinder 3 has at its circumference at a few hundred revolutions per hour, for example a peripheral speed at 300 U / h to about 1000 U / h, at most 2000 U / h and preferably at about 500 U /H. In the embodiment, it corresponds to the pull-in speed.
• the pressure-on speed Nomck-An is preferably at least 5000 U / h of the pressure cylinder 3, but on the other hand, well below the speed of the continuous printing. 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 printing speed N EI ⁇ at the time t 3 , they are further driven by the constant pressure-on speed Noruck-An, while the web B and the sub-webs formed therefrom continue to run or run along the low initial speed N EI ⁇ by 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 in question has been set to the constant speed value Nomck-An.
• 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 event, at a time ts, the driven components per printing unit and also the printing units run synchronously with one another at the speed Noruck-An
• the web B continues to be driven at the initial speed N EI ⁇ until a time t 4 , which is before the time ts.
• 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 Nomck-An.
• the printing cylinders 3 which are still running with the pressure-on speed Nomck-An, are set against the web B.
• the hiring takes place at time ts and is marked in the diagram with "print on”.
• 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.
• the acceleration of the printing units can not be changed abruptly, for example, from zero to a certain value, created in the transition phases a "Verschleiff, as shown qualitatively for the change in acceleration at t 2 .
• a "Verschleiff 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 a further developed start-up sequence in which the rotational angle positions are set in a synchronizing phase.
• the advanced start-up sequence corresponds to the described start-up sequence up to time t 2 and also during most of the acceleration phase from t 2 to t3.
• the printing units are not accelerated in this acceleration phase to the print-on speed Nomck-An, but only to a slightly lower synchronization speed Ns ync h and held at the synchronization speed Ns ync h, while the web B with the initial speed N EI ⁇ further promoted and is accelerated from the time t 4 with preferably constant acceleration to the pressure-on speed Nomck-An.
• the starting sequence of FIG. 3 corresponds to the starting sequence of FIG. 2.
• the position of the web B and the rotational angular positions of the printing and Counter-pressure cylinder 3 or the plate cylinder 4 detected and compared.
• the cylinders 3 and 4 rotate at the time to with the constant synchronizing speed Nsynch-
• the rotational angle positions are set on the basis of the comparison in the subsequent to the time to synchronizing 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 catch-up speed NAvemhoi, which is preferably greater than the pressure-on speed Noruck-An.
• N Aufhoi a catch-up speed
• the cylinder 3 reaches the Aufhol Anthony NAvemhoi, 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 Nsynch-
• Nsynch- preferably back to the Synchronizing speed Nsynch-
• a time t 6 they have reached the same speed as the web B and are now accelerated in a third sub-phase substantially synchronously with the web B to the pressure-on speed Nomck-An.
• the web B and the printing units have reached the printing speed Noruck-An and are stabilized at this speed before the printing machine as a whole continues to accelerate, until finally the speed of the continuous printing is reached.
• the control device calculates the time t 6 at which the web B reaches the synchronizing speed. The calculation is made in the phase in which the web B is accelerated from the initial speed N EI ⁇ , either before or immediately after the detection of the actual positions of the web B and the cylinder 3.
• the controller further calculates on the basis of the Time to detected positions of the web B and the cylinder 3, the actual rotational position positions, which would take the cylinder 3 at time t 6 , if they would continue to rotate constantly with the synchronizing speed Ns ynch . 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 reference position is balanced 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 Ns ync h to the Aufhol Anthony NGermanhoi accelerated and delayed again to the synchronization speed Ns ync h .
• the first and the second partial phase 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.
• the respective starting speed and the respective end speed are stored per acceleration phase. In the simple starting sequence of FIG.
• the speeds N EI ⁇ and Nomck-An are stored.
• the speeds Ns ync h and N Aufhoi 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 U and in the further developed embodiment also the time to 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.
• impression cylinders impression cylinders

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

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• 2006
  • 2006-10-04 DE DE102006046894A patent/DE102006046894B4/de not_active Expired - Fee Related
• 2007
  • 2007-10-02 WO PCT/EP2007/060478 patent/WO2008040742A2/fr active Application Filing
  • 2007-10-02 DE DE502007005983T patent/DE502007005983D1/de active Active
  • 2007-10-02 US US12/444,273 patent/US20100083854A1/en not_active Abandoned
  • 2007-10-02 AT AT07820859T patent/ATE491571T1/de active
  • 2007-10-02 EP EP07820859A patent/EP2069147B1/fr not_active Not-in-force

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