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EP0949075B1 - Machine à imprimer et procédé pour la mise en oeuvre d'une machine à imprimer - Google Patents

Machine à imprimer et procédé pour la mise en oeuvre d'une machine à imprimer Download PDF

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Publication number
EP0949075B1
EP0949075B1 EP99104020A EP99104020A EP0949075B1 EP 0949075 B1 EP0949075 B1 EP 0949075B1 EP 99104020 A EP99104020 A EP 99104020A EP 99104020 A EP99104020 A EP 99104020A EP 0949075 B1 EP0949075 B1 EP 0949075B1
Authority
EP
European Patent Office
Prior art keywords
ink fountain
fountain roller
roller
ink
operating mode
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.)
Expired - Lifetime
Application number
EP99104020A
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German (de)
English (en)
Other versions
EP0949075A2 (fr
EP0949075A3 (fr
Inventor
Felix Dorenkamp
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0949075A2 publication Critical patent/EP0949075A2/fr
Publication of EP0949075A3 publication Critical patent/EP0949075A3/fr
Application granted granted Critical
Publication of EP0949075B1 publication Critical patent/EP0949075B1/fr
Anticipated expiration legal-status Critical
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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
    • B41F33/16—Programming systems for automatic control of sequence of operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/14—Applications of messenger or other moving transfer rollers
    • 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

Definitions

  • the invention relates to a method for operating a printing press, which a Inking unit with one between an ink fountain roller and an inking unit roller occasional contact with these rollers reciprocating lifter roller according to the preamble of claim 1 and a printing press with an inking unit, which one between an ink fountain roller and an inking roller with temporary Contact to these rollers reciprocating jack roller includes, especially to Implementation of the method according to the preamble of claim 9.
  • the ink to be printed is supplied via Lifter inking units, one with an ink fountain and a metering device have interacting ink fountain roller.
  • the ink layer thickness can be adjusted on the ink fountain roller.
  • a Lifter roller takes a streak of color through occasional contact with the ink fountain roller certain length from the ink fountain roller and passes this amount of ink to one subsequent contact with an inking roller on this inking roller.
  • By further inking unit rollers following this inking unit roller are split several times the amount of ink supplied by the squeegee roller and by inking rollers appropriate inking of the printing areas on a printing form cylinder located printing form.
  • the metering device can be adjusted so that the Ink layer thickness changed on the ink fountain roller.
  • the color layer thickness on the Ink fountain roller may, however, a certain minimum value, which is safe reproducibly set, do not fall below.
  • DE-OS 27 20 371 is a device for driving a ductor for inking units described in printing presses in which the amount of ink is changed by the Phase position of the movements of the lifter roller and the ink fountain roller over one Adjustment of the position of the drive and driven member of a non-uniform transmission is carried out to each other, so that the timing of the switching step Ink fountain roller of the lifter roller on the ink fountain roller changed. Should be the amount of paint can be reduced, so the area of the ink fountain roller comes to a standstill in moved the area of the system of the lifting roller on the ink fountain roller. in the In extreme cases, the system of the jack roller on the ink fountain roller in the time of Standstill of the ink fountain roller take place, so that the amount of ink adopted is practical is zero.
  • the amount of ink conveyed into the inking unit can be reduced are, however, the method on which the device is based is exclusively for Devices with a discontinuously driven ink fountain roller can be used.
  • the DE-OS 27 20 371 device for performing the method is also very expensive to construct.
  • DE 44 06 727 C2 describes a method for controlling the fluid supply in the Production of printed products described, in which after entering a Changes in the speed of the printing machine commands before execution of the Speed change the supply rate of the fluid after a predetermined time function changed and after a preselected number of machine revolutions the Speed change of the main drive is initiated. This can be done by initiating the speed change of a color ductor before the speed change becomes. The movement characteristic of the color ductor is always maintained.
  • the invention has for its object a method for operating a To create printing press by which a safely reproducible minimum Ink supply is guaranteed in an inking unit and which also with inking units with a continuously driven ink fountain roller can be used. Furthermore, the Invention, the object of a printing press, in particular for implementation to create the process, which is easy to operate and structurally inexpensive is trained.
  • the object is achieved by a method with the features of Claim 1 and solved by a printing press with the features of claim 9. Further features are contained in the subclaims.
  • the method for operating a printing press which is an inking unit between a Ink fountain roller and an inking roller with occasional contact with these rollers includes reciprocating lifter roller, is characterized in that the Inking unit optionally in a normal operating mode and at least one color-reduced operating mode is operated, the ink fountain roller in Color-reduced operating mode with a different from the normal operating mode Movement characteristic rotates, and that the ink fountain roller in the at least one color-reduced operating mode rotates so unevenly that the oscillating Lifter roller comes into contact with the ink fountain roller at least once when the Ink fountain roller rotates at a first speed, and at least once with the Ink fountain roller comes into contact when the ink fountain roller with a second Speed rotates, the second speed being less than the first Speed is.
  • the periodically repeating lifter cycle described above is naturally at a constant machine speed (Printing speed) operated printing machine related.
  • Print speed machine speed
  • the lifter roller attaches itself to the ink fountain roller for the first time, when the ink fountain roller rotates at a slower speed and settles the lifter roller to the ink fountain roller a second time when the Ink fountain roller rotates at a higher speed, the printing press maintains a constant speed.
  • the second application of the lifting roller to the Ink fountain roller can immediately follow the first application, d.
  • the Lift roller after the first application to the ink fountain roller towards the inking roller and swings back to the ink fountain roller and then attaches to the ink fountain roller, when it rotates at a different speed, this process changing periodically repeated, so that the lifting roller alternates with the faster and slower rotating ink fountain roller.
  • the Lifter roller several times in succession to the slowly rotating ink fountain roller and then several times in succession to the faster rotating one Ink fountain roller creates. For example, the lifter roller contacts the ink fountain roller twice in a row, if it turns slowly, then twice in a row, if it turns faster, then twice in a row if it turns slowly, etc. In this way, many and many can Operating conditions optimally corresponding movement characteristics of the Ink fountain roller can be realized in the color-reduced operating modes.
  • the invention relates to one of the prior art (DE-OS 27 20 371) Teaching opposite direction.
  • DE-OS 27 20 371) teaching opposite direction.
  • an exact setting of the color metering is very complicated because at different ink fountain roller rotation speeds and the associated different hydrodynamic pressure a different color knife deformation occurs.
  • the cause of the deficiency is seen in the fact that a change in dosage always is associated with a change in the characteristics of the ink fountain roller movement and thus the entire dynamic behavior of the device changes.
  • the invention is based on the surprising finding that Color knife deformation due to different hydrodynamic pressure Ink tanks with a modern metering device does not play an important role. Furthermore, it was recognized according to the invention that a change in the Characteristic of the ink fountain movement a structurally particularly complex construction the printing press can be realized.
  • the optional operation of the inking unit in one normal operating mode and at least one color-reduced operating mode enables a very comfortable operation of the printing machine and a particularly rapid adjustment of the amount of ink conveyed into the inking unit when the ink changes Pressure and / or operating conditions.
  • the inventive Procedure optionally according to a first law of motion in normal operating mode and according to at least one second law of motion in at least one color-reduced operating mode.
  • the ink fountain roller can either be in normal operating mode continuously and in the color-reduced operating mode discontinuously or in normal Discontinuous operating mode and continuous in the color-reduced operating mode rotate.
  • the ink fountain roller rotates continuously in the normal operating mode.
  • This embodiment enables the ink fountain roller by a inexpensive drive, for example an electric motor, can be driven.
  • the ink fountain roller is controlled by a separate, controllable electric drive driven.
  • the ink fountain roller can also be from one of the printing unit drive derived mechanical drive are driven.
  • the ink fountain roller can normal operating mode but also be operated discontinuously and for example rotate gradually.
  • the speed of rotation is continuously rotating Ink fountain roller coupled with the machine speed (printing speed).
  • the speed and the step frequency can also be used be coupled to the machine speed.
  • Another embodiment is characterized in that the ink fountain roller in color-reduced operating mode non-uniform, especially discontinuous, rotates.
  • the discontinuous rotary movement of the Ink fountain roller is a preferred special case of the non-uniform rotary movement.
  • the Ink fountain roller performs an intermittent in the color-reduced operating mode Rotating movement with temporary standstill. In this way, the in the inking unit the amount of ink conveyed can be reliably reduced reproducibly. This is not a complex process mechanical gear required.
  • the electric motor can be periodically accelerated and be delayed or stopped intermittently.
  • Another embodiment of the method is characterized in that the Inking unit is optionally operated in one of several color-reduced operating modes, the color-reduced operating modes with respect to the degree of color reduction are different from each other.
  • grading the color-reduced operating modes can be the optimal under different operating and / or pressure conditions
  • Color-reduced operating mode can be selected. Choosing the optimal operating mode in Depending on the amount of color required for a printing process, such take place so that the inking unit with the lowest possible for trouble-free operation permissible amount of paint is operated.
  • Switching or switching from normal to the at least one color-reduced operating mode can be dependent on one Machine speed reduction and from a color-reduced operating mode in the normal operating mode depending on an increase in machine speed respectively. The same applies to switching or switching between several color-reduced operating modes.
  • the changeover or switching is preferably carried out automated.
  • the zone openings lowest color requirements are kept open by the printing process and will be a Possibility created the metering elements of the color metering device again To be able to correct "plus” and "minus” so that the one set transversely to the printing direction Color profile effectively corrected by the printing process even with minimal ink consumption can be.
  • the electronic control device can be a microprocessor included and be programmable so that the choice of operating modes and Switching the inking unit into the optimal operating mode is done automatically. Thereby the monitoring and operation of the printing press is simplified.
  • the electronic The control device then controls the according to a programmed control method described above and below, in particular in the exemplary embodiments Control processes in the implementation of the method according to the invention in the Printing machine according to the invention.
  • the printing press in particular for performing the method, with a Inking unit, which has one between an ink fountain roller and an inking unit roller
  • This includes occasional contact with this reciprocating siphon roller characterized in that the inking unit optionally in a normal operating mode and is designed to be operable in at least one color-reduced operating mode, the Ink fountain roller in the reduced-color operating mode with one of the Movement characteristics differ when operating in normal operating mode Movement characteristic rotates, and that the drive of the ink fountain roller Ink fountain roller in the at least one color-reduced operating mode rotates non-uniformly, so that the vibrating lifting roller at least once with the Ink fountain roller comes into contact when the ink fountain roller with a first Speed rotates and comes into contact with the ink fountain roller at least once comes when the ink fountain roller at a second speed or speed rotates, the second speed or speed less than the first Speed or speed is.
  • the Ink fountain roller driven by a controllable separate drive.
  • the drive of the Ink fountain roller can, for example, be electronically coupled to the printing press, so that the ink fountain roller depending on the press speed is drivable.
  • a separate drive of the ink fountain roller makes one particularly possible uncomplicated construction of the printing press. But it can also be a gearbox with the ink fountain roller drive connected to the main drive of the printing press be provided.
  • Such a transmission can be adjustable or switchable in this way that the inking unit can optionally be operated in the operating modes.
  • Another embodiment of the printing press is characterized in that the Drive of the ink fountain roller rotates continuously in normal operating mode.
  • Another embodiment of the printing press is characterized in that the Drive of the ink fountain roller non-uniform in the reduced-color operating mode, especially discontinuously, rotates.
  • Another embodiment of the printing press is characterized in that the Inking unit can optionally be operated in one of several color-reduced operating modes is formed, the color-reduced operating modes with respect to the extent of Color reduction are different from each other.
  • Another embodiment of the printing press is characterized in that the second speed is zero and the ink fountain roller stops when the Lifter roller strikes this.
  • This design is a special case of Invention.
  • Another embodiment of the printing press is characterized in that this includes an electronic control device which the optimal operating mode selects and the press switches to this operating mode or switches.
  • the printing press is preferably a rotary printing press, for example a Sheet-fed rotary printing machine, trained.
  • the printing press can be in direct or indirect flat printing processes or in letterpress processes.
  • the printing press can be designed as a sheetfed offset printing press.
  • the aforementioned types of printing press are used to carry out the The method according to the invention is particularly suitable.
  • the printing press 1 shows a printing press 1 according to the invention, which has at least one Printing unit 2 comprises.
  • the printing press 1 is as one Sheet-fed offset rotary printing press.
  • Each printing unit 2 comprises one Printing form cylinder 3, a blanket cylinder 4, an impression cylinder 5 and a Inking unit 6 for applying the printing ink to those on the printing form cylinder 3 located printing form.
  • each printing unit 2 can be assigned to the inking unit 6 associated dampening unit 7 include.
  • the printing press 1, each printing unit 2 and each inking unit 6 are by the electronic control device 8 with at least controlled by a microprocessor 9.
  • the electronic control device 8 can Control panel 10 can be set and programmed.
  • FIG. 2 shows a more detailed representation of the inking unit 6, which one Ink fountain 11 with an ink fountain roller 12 and the ink fountain 11 and Ink fountain roller 12 associated ink metering device 22 includes.
  • the inking unit 6 includes in addition to the lifter roller 14 and the inking unit roller 15 further inking unit rollers for conveying and applying the printing ink.
  • the ink fountain roller 15 is preferably as a friction roller formed which a lateral in the direction of its axis of rotation 21 Executes traversing movement.
  • the jack roller 14 swings between the Ink fountain roller 12 and the inking roller 15 back and forth.
  • the jack roller 14 can swing linearly back and forth between the rollers 12, 15. This is preferably done However, the lifting roller 14 swings by a pivoting movement.
  • the Lifter roller 14 arranged on the pivoted lever 20 mounted in the frame 13.
  • the pivot lever 20 is driven by the cam gear 19.
  • the Cam gear 19 is driven by the drive 17.
  • the drive 17 is preferably the main drive of the printing press 1, which also the printing unit 2 and drives the printing form cylinder 3.
  • With the setting device 18 is the number of Vibrations of the lifter roller 14 from the ink fountain roller 12 to the inking roller 15 and back to the ink fountain roller 12 based on a certain number of Revolutions of the printing form cylinder 3 variably adjustable.
  • the swinging movement of the Lifter roller 14 can also by a main drive of the printing press 1st independent drive, such as a pneumatic cylinder, take place Synchronization of the separate drive of the jack roller 14 to the main drive of the Printing machine 1 by means of an incremental encoder and the electronic control device 8 can be guaranteed.
  • the jack roller 14 sets itself in a defined rhythm alternately to the ink fountain roller 12 and the first in the ink roller train Inking unit roller 15.
  • Lifter roller 14 rotates on the ink fountain roller 12 at a certain speed, passes the ink fountain roller 12 to the lifting roller 14 rolling on it Color strips, which of the siphon roller 14 during its investment in the Inking unit roller 15 is transferred to the latter and is conveyed into the inking unit 6.
  • the length of the ink strip is from the contact time of the lifting roller 14 to the ink fountain roller 12 and the angle of rotation by which the ink fountain roller 12 during the installation of the Lifter roller 14 is rotated, depending.
  • To influence the amount of paint transferred can the ink layer thickness on the ink fountain roller 12 by means of Color metering device 22 and by changing the rotational speed of the Ink fountain roller 12 and the choice of the corresponding operating modes can be influenced.
  • the rotation of the ink fountain roller 12 is driven by the drive 16.
  • the ink fountain roller 12 by one of the main drive Printing machine 1 driven independent separate drive 16, as shown in Fig. 2nd is shown.
  • An incremental encoder can be used to synchronize a separate one Drive 16 to the main drive of the printing press, so that the Drive 16 when the printing press speed changes Ink fountain roller 12 of changes in printing press speed correspondingly faster or slower.
  • the synchronization of the rotation of the Ink fountain roller 12 to the main drive 17 of the printing press can be directly proportional or according to another functional relationship (characteristic curve) and through the electronic control device 8 take place controlled. But it can also be provided that the rotation of the ink fountain roller 12 via a gear by the main drive 17 Printing machine 1 is driven.
  • the gear can be adjusted in this way be designed so that the ink fountain roller 12 optionally depending on the setting of Gearboxes in different operating modes with different movement characteristics rotates.
  • the synchronization of the phase relationship of the rotation is the Ink fountain roller 12 for rotation of the printing form cylinder 3 given in a simple manner.
  • Ink fountain roller 12 and the printing form cylinder 3 and the vibration of the Lifter roller 14 also control the setting of the ink metering device 22.
  • the inking unit 6 shown is preferably designed such that the ink fountain roller 12 in a normal operating mode continuously and in at least one reduced color Operating mode rotates discontinuously. In the operating modes, i.e. both in normal as well as in the color-reduced operating mode, the rotation speed is the Ink fountain roller 12 preferably carried at the printing press speed.
  • the movement of the jack roller 14 is also related to the press speed coupled and the lifting roller preferably vibrates continuously.
  • the color metering device 22 comprises zone-wide Dosing elements 23-26, their training in DE 26 48 098 C3 (corresponding to US 4,242,958).
  • the metering elements are 23-26 especially as the cylindrical and described in the cited patent Embodiment formed rotatable circumferential direction.
  • Dosing elements are also completely new in the book "Offsetdrucktechnik” 6 Edition 1989, suschriftenverlag GmbH and Co KG, ISBN 3-921217 on page 414 described and shown as well as of the "Speedmaster” printing press type of the company Heidelberger Druckmaschinen AG has been known for many years.
  • the color metering elements 23-26 and one optionally existing film covering the color metering elements 23-26 therefore DE 26 48 098 C3 in its entirety in the description of the present Invention to be included.
  • Changes in the movement characteristics of the ink fountain roller 12 no change the color film thickness due to different hydrodynamic forces of the color.
  • the Reworkability of the invention it should be emphasized that in connection with the invention also differently designed color metering devices are used, the color metering element or elements of sufficient stability have, so that these even with different movement characteristics of the Ink fountain roller or different ink fountain roller rotation speeds none subject to significant deformations.
  • Fig. 3 it is shown that the Dosing elements 23-26 at a different distance from the ink fountain roller 12 are adjustable. From the distance of the metering elements 23-26 to the ink fountain roller 12 Depending on the setting, there is a distance or a distance in the individual color zones Metering opening 27 between the respective metering element 23 and the peripheral surface the ink fountain roller 12. In a between the metering elements 23-26 and Ink fountain roller 12 inserted film (not shown) results in the metering opening 27 between the film and the ink fountain roller 12. Each metering device 27 by the rotation of the ink fountain roller 12 from the ink fountain 11 one of the zonal Setting appropriate amount of ink 35 promoted by the jack roller 14th can be removed.
  • Each metering element 23-26 is in a negative Adjustment device 28 and a positive adjustment device 29 are designed to be adjustable.
  • the distance between the Metering element 23-26 enlarged or the respective metering opening 27 opened so that more ink is conveyed through it.
  • the metering opening 27 is closed, so that less printing ink can pass through the respective metering opening 27.
  • the dosing element 24 is located in a medium setting, so that this is in both setting directions 28, 29 is adjustable.
  • the metering element 26 is set such that the associated one Dosing opening 27 is minimally opened or completely closed and an adjustment of the metering element 26 is only possible in the positive direction 29.
  • the Metering element 23 is set such that the metering opening 27 is opened to a maximum and an adjustment of the metering element 23 is only possible in the negative direction 28 is.
  • the adjustment of the metering elements 23-26 designed as an eccentric takes place by rotation about its axis of rotation.
  • the color metering elements 23-26 adjusted and the Rotation speed of the ink fountain roller 12 can be changed, both the Ink layer thickness on the ink fountain roller 12 and the rotational speed of the Ink fountain roller 12 in practice certain minimum values that are reliably reproducible, do not fall below.
  • a flow chart which shows a preferred sequence of the Method for operating the printing press 1 includes.
  • the single ones Process steps are shown as program levels 30-34 of a program, according to which the electronic control device 8 in the preferred automatic Carrying out the method controls the printing press 1 and the inking unit 6.
  • the Program stage 30 operates the inking unit 6 in a first operating mode. This is for example the normal operating mode.
  • the ink fountain roller 12 rotates also continuously and initially at constant machine speed constant speed. As the press speed decreases, it decreases the color requirement.
  • the speed of the ink fountain roller 12 is functionally dependent on the Change in press speed, for example proportional to Press speed, to one of the reduced amount of ink required corresponding lower ink fountain roller speed changed.
  • the ink fountain roller speed is calculated by the electronic control device 8 on the basis of characteristics, functions or value tables stored in their memory which Ink fountain roller speed to realize the required amount of ink with reduced Press speed is necessary.
  • the result of this calculation namely the required ink fountain roller speed a minimum speed stored in the electronic control device 8 compared. If the ink fountain roller speed required is not less than that Minimum speed, i.e. is greater or equal, the program jumps to Program level 32 and if the required ink fountain roller speed is less than that Minimum speed is in program level 33.
  • the operating modes shown in Fig. 5c-g which in the form of predetermined Subroutines can be programmed.
  • several operating modes is additional one that switches to the following operating mode when program level 33 is called inner counting loop programmed.
  • program level 33 you can choose between next possible operating mode or in the next possible ink fountain roller operating mode be switched.
  • the color-reduced operating mode is in program stage 33 called.
  • the color-reduced one called up first Operating mode the operating mode shown in Fig. 5c and the second Running through the loop 31, 33 called second color-reduced operating mode in Fig. 5d correspond to the operating mode shown.
  • the program loop 31, 33 becomes like this often run through until the optimal ink fountain roller speed has been found, which is not less than the minimum speed. If this condition is met, it jumps Program thereafter from program level 31 to program level 32, in which the electronic control device 8 automatically according to programmed control strategies decides whether the required metering opening 27 (Fig. 3) in a medium, well adjustable range is set.
  • the electronic control device 8 can Control of the settings of the color metering device 22 can be used so that the current setting values of the metering elements 23-26 of the electronic control device 8 available.
  • the metering opening 27 is in the middle of the well meterable range if that Dosing element 23-26 both in the negative direction 28 and in the positive Direction 29 is adjustable. In essence, it is sufficient if the electronic Control device 8 checks whether all metering elements 23-26 are still in the negative Direction 28 can be corrected or adjusted.
  • the procedure is therefore when the printing machine speed is reduced longer zonal metering openings 27 possible without the inking unit amount of ink conveyed must be increased. In this way, the color profile over the Corrected printing width even in this operating state of the printing press become.
  • the loop 31, 32, 33 is run through until the condition corresponding to program level 32 is met is, so that the program jumps to program level 34 and the printing press 1 in operates an optimal operating mode in which the ink fountain roller 12 with a optimal ink fountain roller speed rotates and the metering orifices 27 Dosing elements 23-26 are in an optimally adjustable setting range.
  • the operating mode can be changed instead of by the electronic control device 8 also done visually or manually by the printer operating the printing press 1.
  • the method is further characterized in that the Switch from normal operating mode to an optimal color-reduced one Operating mode of several color-reduced operating modes takes place, each of which optimal color-reduced operating mode pre-graded color-reduced operating mode the Speed is below the minimum.
  • the process characterized in that the ink fountain roller 12, an ink fountain 11 and the Ink fountain roller 12 is assigned an adjustable metering device 22, the Ink fountain roller 12 corresponding to the setting of the metering device 22 a lot Promotes printing ink from the ink fountain 11, and that after switching into one Color-reduced operating mode in which the minimum rotation speed of the Ink fountain roller 12 is guaranteed, a check is made whether there is a subsequent Correction of the setting in both setting directions 28, 29 or at least in one of the Setting directions 28, 29 of the metering device 22 is possible.
  • the method is characterized in that the choice of the optimal one Operating mode can be done by the operator.
  • the process is thereby characterized that checking whether a correction to the setting of the Dosing device in both setting directions 28, 29 or at least in the Setting direction 28 is possible, can be done by the operator.
  • FIG. 5 shows the characteristic of the movement of the lifting roller 14 in diagram a shown.
  • the lifter roller 14 continuously swings between the ink fountain roller 12 and the inking roller 15 back and forth, the phase relationship of the lifting stroke to Phase position of the printing unit preferably by one of the main drive 17 (FIG. 2) Printing machine removed rotary movement of the cam plate of the lifting roller 14 driving cam mechanism 19 is realized.
  • the phase 36 the application of the lifting roller 14 on the Inking unit roller 15, phase 37 the movement of the lifting roller 14 Ink fountain roller 12, the phase 38 the concern of the lifting roller 14 on the Ink fountain roller 12 and the phase 39 the movement of the lifting roller 14 from the Represent ink fountain roller 12 back to inking roller 15.
  • the oscillation cycle 40 the lifter roller 14 from the inking roller 15 to the ink fountain roller 12 and back repeats itself periodically, with the lifter roller 14 oscillating continuously.
  • Diagram b is the movement characteristic of the ink fountain roller 12 in normal Operating mode shown, with the ordinate axis in the diagrams b-g Speeds of the ink fountain roller 12 and the abscissa axis the number of Machine revolutions or the rotation angle ⁇ represents. With the same Printing machine speed also rotates the ink fountain roller 12 at a constant rate Speed, the rotation 41 of the ink fountain roller 12 in normal Operating mode is continuous.
  • Diagrams c-g are preferred Embodiments of the color-reduced operating modes are shown, with diagram b according to the diagram g the printing ink is reduced more or more Ink feed rate decreases.
  • the color-reduced shown in diagrams c-g Operating modes are optionally called up in program stage 33 (FIG.
  • the first color-reduced operating mode shown in diagram c is characterized in that the ink fountain roller 12 at a first impact of the Lifter roller 14 on the ink fountain roller 12 stands still, at least two of the first Impact immediately following and successive impacts rotates and in the case of a further impact immediately following the at least two impacts stands still again and immediately in the event of at least two further hits subsequent and successive impacts rotated again etc. This Movement characteristics are repeated periodically.
  • the Ink fountain roller 12 an extremely short ink strip from the ink fountain roller 12 through the Lifting roller 14 removed, which theoretically is an axially parallel line corresponds and practically due to the deformation of the elastic lifter roller 14 and Tracking of the lifter roller 14, which is driven in rotation by the inking roller 15 can correspond to a ribbon extending in the axis-parallel direction.
  • the movement phases 42-45 of the ink fountain roller 12 are uniform denotes, with phase 42 an acceleration of the rotation from standstill a speed value dependent or set on the machine speed equivalent.
  • phase 43 the ink fountain roller 12 rotates with it Speed, which is constant at constant machine speed.
  • Phase 44 indicates a delay in the rotation of the ink fountain roller to a standstill, the ink fountain roller 12 is stationary again during phase 45.
  • a A summary of the diagrams a and c shows that the ink fountain roller 12 during a Lifting stroke, d. H. during a resting phase of the lifting roller 14 on the Ink fountain roller 12, stands still and rotates during several lifting cycles.
  • the Rotation cycle 46 is repeated periodically.
  • the second shown in diagram d Color-reduced operating mode is characterized in that the ink fountain roller 12 at a first impact of the lifter roller 14 on the ink fountain roller 12 stands still a single second impact immediately following the first impact rotates and at a third immediately following the second impact Impact stops again, etc. This process or the rotation cycle 47 is repeated periodically, so that the lifting roller 14 alternately to the standing Ink fountain roller and applied to the rotating ink fountain roller.
  • diagram e there is a shown third color-reduced operating mode, in which the ink fountain roller 12 at a first impact of the lifter roller 14 rotates on the ink fountain roller, at at least two immediately following the first impact and consecutive impacts and one or at least two impacts immediately following further impacts rotated again, etc.
  • the lifting roller 14 just puts on the stationary ink fountain roller 12.
  • the rotation cycle 49 repeats itself periodically.
  • the Speed n2 (diagram f) is less than speed n1 (diagram e).
  • Less fresh Color is achieved in that the ink fountain roller 12 between the Lifter roller system times slowly turn and little ink from the ink fountain 11 draws. No fresh paint at all can be achieved in that the ink fountain roller 12 also stands still between the lifter roller system times.
  • Ink fountain roller rotation is a change in color reduction within different Reach operating modes.
  • the one in diagram e is dash-dotted variant shown with the speed n3 one compared to the fully illustrated Variant with the speed n1 represents more color-reduced operating mode.
  • the measure of Color reduction can thus be achieved by changing the rhythm of the Ink fountain roller rotation and / or the size of the speed can be varied.
  • a fifth color-reduced operating mode is shown, which thereby is characterized in that the jack roller 14 several times in succession on the Ink fountain roller 12 strikes when it is stationary.
  • the fifth operating mode characterizes that the ink fountain roller 12 within a first oscillation phase of the Lifter roller 14 to the inking roller 15 every now and then back to the ink fountain roller 12 rotates, in at least two immediately following the first oscillation phase and successive impingement of the lifter roller 14 on the ink fountain roller 12 stands still and within a second immediately following the at least two hits Vibration phase of the lifter roller 14 to the inking roller 15 every now and then Ink fountain roller rotates back, etc.
  • the ink fountain roller 12 does not rotate after each Lifter stroke or application of the lifter roller 14 to the ink fountain roller a little further, but only after several lifters.
  • the rotation cycle 50 repeats periodically.
  • the ink fountain roller 12 rotates according to the c-g in the diagrams movement characteristics shown discontinuously or intermittently.
  • the Deviation of the movement characteristics of each color-reduced operating mode to the in Diagram b shown normal operating mode is that the Ink fountain roller 12 in the normal operating mode continuously and in the color-reduced operating modes rotated discontinuously.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (15)

  1. Procédé pour faire fonctionner une machine à imprimer (1) qui comprend un dispositif d'encrage (6) possédant un rouleau preneur qui peut pivoter en va-et-vient entre un rouleau d'encrier (12) et un rouleau de dispositif d'encrage (15), avec contact temporaire avec ces rouleaux (12, 15), caractérisé en ce que le dispositif d'encrage (6) est actionné sélectivement dans un mode de fonctionnement normal et dans au moins un mode de fonctionnement à encrage réduit, le rouleau d'encrier (12) tournant, dans le mode de fonctionnement à encrage réduit, avec une caractéristique de mouvement qui est différente du mode de fonctionnement normal, et en ce que, dans l'au moins un mode de fonctionnement d'encrage réduit, le rouleau d'encrier (12) tourne irrégulièrement de telle manière que le rouleau preneur pivotant (14) entre en contact au moins une fois avec le rouleau d'encrier (12) lorsque le rouleau d'encrier (12) tourne à une première vitesse et au moins une fois avec le rouleau d'encrier (12) lorsque le rouleau d'encrier (12) tourne à une deuxième vitesse, la deuxième vitesse étant plus petite que la première vitesse.
  2. Procédé selon la revendication 1, caractérisé en ce que, dans le mode de fonctionnement normal, le rouleau d'encrier (12) tourne continuellement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, dans l'au moins un mode de fonctionnement à encrage réduit, le rouleau d'encrier (12) tourne irrégulièrement, en particulier de façon discontinue.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le dispositif d'encrage (6) est mis sélectivement en fonctionnement dans l'un de plusieurs modes de fonctionnement à encrage réduit, les modes de fonctionnement à encrage réduit différant l'un de l'autre par le degré de réduction de l'encrage.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la deuxième vitesse a la valeur zéro et le rouleau d'encrier (12) est à l'arrêt lorsque le rouleau preneur (14) rencontre le rouleau d'encrier (12).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la commutation du mode de fonctionnement à l'au moins un mode de fonctionnement à encrage réduit se produit lorsque, dans le mode de fonctionnement normal, on passe au-dessous de la vitesse minimale de rotation ou du nombre minimal de tours du rouleau d'encrier (12).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la sélection des modes de fonctionnement est exécutée par un dispositif de commande électronique (8), en particulier par un dispositif de commande électronique programmable qui comporte un microprocesseur (9).
  8. Procédé de commande pour la mise en oeuvre du procédé de fonctionnement selon l'une des revendications 1 à 7, caractérisé en ce que la sélection des modes de fonctionnement et la commutation du dispositif d'encrage (6) dans le mode de fonctionnement optimal pour le moment considéré est exécutée par un dispositif de commande électronique (8) de façon commandée par un programme.
  9. Machine à imprimer (1), en particulier pour la mise en oeuvre du procédé selon l'une des revendications 1 à 8, comprenant un dispositif d'encrage (6) qui comprend un rouleau preneur (14) pouvant pivoter en va-et-vient entre un rouleau d'encrier (12) et un rouleau (15) du dispositif d'encrage avec contact temporaire avec ces rouleaux (12, 15), caractérisée en ce que le dispositif d'encrage (6) est réalisé de façon à pouvoir être actionné sélectivement dans un mode de fonctionnement normal et dans au moins un mode de fonctionnement à encrage réduit, le rouleau d'encrier (12) tournant, dans l'au moins un mode de fonctionnement à encrage réduit, avec une caractéristique de mouvement qui est différente du mode de fonctionnement normal, et en ce que, dans l'au moins un mode de fonctionnement à encrage réduit, l'entraínement (16) fait tourner le rouleau d'encrier (12) irrégulièrement de telle manière que le rouleau preneur pivotant (14) entre en contact au moins une fois avec le rouleau d'encrier (12) lorsque le rouleau d'encrier (12) tourne à une première vitesse et au moins une fois avec le rouleau d'encrier (12) lorsque le rouleau d'encrier (12) tourne à une deuxième vitesse, la deuxième vitesse étant plus petite que la première vitesse.
  10. Machine à imprimer selon la revendication 9, caractérisée en ce que le rouleau d'encrier (12) est entraíné par un entraínement (16) séparé de l'entraínement principal (17) de la machine à imprimer (1), en particulier par un moteur électrique séparé.
  11. Machine à imprimer selon la revendication 10, caractérisée en ce que, dans le mode de fonctionnement normal, l'entraínement (16) entraíne continuellement le rouleau d'encrier (12) en rotation.
  12. Machine à imprimer selon la revendication 10 ou 11, caractérisée en ce que, dans le mode de fonctionnement à encrage réduit, l'entraínement (16) entraíne le rouleau d'encrier (12) en rotation irrégulièrement, en particulier de façon discontinue.
  13. Machine à imprimer selon l'une des revendications 9 à 12, caractérisée en ce que le dispositif d'encrage (6) est réalisé de façon qu'on puisse le faire fonctionner sélectivement dans l'un de plusieurs modes de fonctionnement à encrage réduit, les modes de fonctionnement à encrage réduit différant l'un de l'autre par le degré de réduction de l'encrage
  14. Machine à imprimer selon l'une des revendications 9 à 13, caractérisée en ce que la deuxième vitesse ou le deuxième nombre de tours a la valeur zéro et le rouleau d'encrier (12) est arrêté lorsque le rouleau preneur (14) le rencontre.
  15. Machine à imprimer selon l'une des revendications 9 à 14, caractérisée en ce qu'elle comprend un dispositif de commande électronique (8) qui sélectionne le mode de fonctionnement optimal, en particulier en fonction des états actuels de fonctionnement de la machine à imprimer (1), et commute la machine à imprimer (1) dans ce mode de fonctionnement.
EP99104020A 1998-04-06 1999-03-12 Machine à imprimer et procédé pour la mise en oeuvre d'une machine à imprimer Expired - Lifetime EP0949075B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19815293 1998-04-06
DE19815293A DE19815293A1 (de) 1998-04-06 1998-04-06 Druckmaschine und Verfahren zum Betrieb einer Druckmaschine

Publications (3)

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EP0949075A2 EP0949075A2 (fr) 1999-10-13
EP0949075A3 EP0949075A3 (fr) 2000-05-10
EP0949075B1 true EP0949075B1 (fr) 2002-02-06

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EP99104020A Expired - Lifetime EP0949075B1 (fr) 1998-04-06 1999-03-12 Machine à imprimer et procédé pour la mise en oeuvre d'une machine à imprimer

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Country Link
US (1) US6227113B1 (fr)
EP (1) EP0949075B1 (fr)
JP (1) JP4321903B2 (fr)
DE (2) DE19815293A1 (fr)

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US6526888B2 (en) * 2000-12-01 2003-03-04 Heidelberger Druckmaschinen Ag Reduced vibration printing press and method
JP3976727B2 (ja) * 2003-12-08 2007-09-19 リョービ株式会社 印刷機のインキ練り方法及び印刷機
DE102007046106B4 (de) * 2007-09-27 2020-08-27 Koenig & Bauer Ag Verfahren und Vorrichtung zur Synchronisierung periodischer Zustellbewegungen eines Farb- oder Feuchtmittelhebers
DE102010022365B4 (de) * 2009-06-26 2024-08-14 Heidelberger Druckmaschinen Ag Erhaltung des Farbprofils im Farbwerk bei Druckunterbrechungen
CN104943356B (zh) * 2014-03-28 2018-03-20 南京造币有限公司 雕刻凹印输墨装置
DE102015101497A1 (de) * 2014-08-09 2016-02-11 manroland sheetfed GmbH Hochdynamische Farbdichteregelung
DE102015213794A1 (de) 2014-09-05 2016-03-10 Heidelberger Druckmaschinen Ag Heberwalzenantrieb
DE102016205343A1 (de) * 2016-03-31 2017-10-05 Koenig & Bauer Ag Farbwerk für eine Druckmaschine
CN113459655B (zh) * 2021-08-14 2022-11-15 浙江圣林包装有限公司 一种塑料袋生产的双面不间断印刷设备

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Also Published As

Publication number Publication date
JP4321903B2 (ja) 2009-08-26
DE59900812D1 (de) 2002-03-21
EP0949075A2 (fr) 1999-10-13
EP0949075A3 (fr) 2000-05-10
DE19815293A1 (de) 1999-10-07
JPH11320841A (ja) 1999-11-24
US6227113B1 (en) 2001-05-08

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