DE102006008002A1 - Inking unit, and method for the sujetspezifischen vote a configuration state of the same - Google Patents

Abstract

The invention relates to an inking unit for a printing machine, in particular a roller inking unit for an offset rotary printing machine for processing a printing material in sheet-fed printing or also in web printing. The invention is also directed to a method for subject-specific coordination of a configuration state of the same. The invention is based on the object of creating solutions by means of which it is possible to enable the transfer of ink from the area of the ink fountain to the printing form in a manner that is particularly advantageous for the subject and in particular to counteract the problem of color loss and stenciling. According to the invention, this object is achieved by an inking unit for an offset printing machine with several application rollers, which are in contact with a forme cylinder, a first and a second distribution roller upstream of the application rollers in the ink flow, further inking rollers upstream of the distribution rollers in the ink flow, which as such are used to accomplish the Serve ink supply from an ink application area, and a distribution drive device for realizing the axial movement of the distribution rollers, wherein the distribution drive device is designed such that the phase position of the stroke movement of the first distribution roller can be adjusted in relation to the stroke movement of the second distribution roller.

Description

The The invention relates to an inking unit for a printing press, in particular a roller inking unit for an offset rotary press for processing a substrate in sheet-fed or web-fed printing. The invention is directed continue to rely on a procedure for project-specific coordination a configuration state of the inking unit.

inking for offset printing machines usually include several, the color transfer serving rollers, on which the respective ink sufficiently evened up transfer the printing form can be. These inking units can for example, as multi-roll inking units, or as a color storage inking units accomplished be. The feed of the ink to the first (e.g., ductor) roll of the Inking, can over Color meter (or color slider) are set, whose distance to the roller over Regulating and zone screws is changeable. The dosing gap defined between the ink knife and the roller can be zonal adjusted to different gaps within the format width, to the possibly different color consumption in the respective zone Take into account. This area-specific color consumption can in advance based on data for the respective subject can be determined. In these inking works are typically also referred to as "impeller" designated rollers Become a publisher during their circulation around their longitudinal axis also moved in the axial direction and thereby cause a transverse displacement and trituration of the ink in the corresponding nip.

at The widespread inking the stroke of the distributor rollers is adjustable variable. amendments can be done by a specialist with regard to specific subjects, if e.g. a fine font and a solid face next to each other, or if several colors side by side in a shared color box guided become.

Of the Invention has for its object to provide solutions by which it possible is the color transfer from the area of the ink fountain to the printing plate in a particular subject of the particular account bearing Way to enable and in particular the problem of color waste as well as the stenciling effect counter.

• – mehreren Auftragswalzen, die an einem Formzylinder anstehen,
• – einer ersten und einer zweiten, den genannten Auftragswalzen im Farbfluss jeweils vorgelagerten Verreiberwalze,
• – weiteren, im Farbfluss den Verreiberwalzen vorgelagerten Farbwalzen, die als solche der Bewerkstelligung der Farbzufuhr aus einem Farbdosiersystem dienen, und
• – einer Verreibungsantriebseinrichtung zur Bewerkstelligung der axialen Bewegung der Verreiberwalzen,
• – wobei die Verreibungsantriebseinrichtung derart ausgebildet ist, dass die Phasenlage der Hubbewegung der (in Druckrichtung) ersten Verreiberwalze gegenüber der Hubbewegung der (in Druckrichtung) zweiten Verreiberwalze einstellbar veränderbar ist.

This object is achieved by an inking unit for an offset printing machine with:

• A plurality of applicator rolls, which are present at a form cylinder,
• - a first and a second, said applicator rollers in the color flow respectively upstream Verreiberwalze,
• - Further, in the color flow of the distributor rollers upstream of ink rollers, which serve as such to accomplish the ink supply from a Farbdosiersystem, and
• A Verreibungsantriebseinrichtung for managing the axial movement of the Verreiberwalzen,
• - The Verreibungsantriebseinrichtung is formed such that the phase position of the lifting movement of the (in the printing direction) first Verreiberwalze against the lifting movement of the (in the printing direction) second Verreiberwalze is adjustable variable.

Thereby is it possible in an advantageous manner an inking unit for to provide an offset printing machine, wherein by vote the rubbing movement of at least two inking rollers of the inking unit to each other a printing optimization with regard to different subject matter and customer requirements becomes. On the basis of the concept according to the invention it becomes possible to To create inking, in which movement by tuning the Verreibungs the offset rollers cause problems with respect to the color waste, as well as with regard to the stenciling tendency.

The inking system according to the invention may be configured such that the adjustment of the Verreibungsantriebseinrichtung fully automatic using actuators. The setting according to the invention the inking unit can hereby without extension during conversion set-up times of the print job respectively.

According to one particularly preferred embodiment the invention, the inking unit is designed such that the phase position the distributor rollers to each other is continuously variable. It is also possible to especially often occurring Sujetcharakteristika invoice inking settings through this specially prepared setting points.

The Phase position of the lifting movement of the at least two distributor rollers to each other is preferably adjustable in an angular range of at least π / 2. Preferably, however, the Verreibungsantriebseinrichtung is so designed such that the phase position in an angular range up to 2π (360 °) changeable is.

The Verreibungsantriebseinrichtung invention is designed according to a particular aspect such that not only the phase position of the lifting movement of the distributor rollers to each other, but in particular also the stroke of the respective Ver distributor roller itself is adjustable changeable. Thus, it is in particular possible to set the Verreibungshub the (seen in the printing direction) first Verreiberwalze larger than the stroke of the (seen in the printing direction) second Verreiberwalze.

It is possible, the Verreibungsantriebseinrichtung form so that the drive the distributor rollers over a common gear train, in particular a common main eccentric takes place. Alternatively, however, it is also possible for the Verreibungsantriebseinrichtung train so that for each distributor roller provided a self-contained drive train is. It is possible the Verreibungsantriebseinrichtung form so that it is operated machine synchronously, wherein the drive power by mechanical means from the drum or Cylinder drive system is branched off. Alternatively, it is also possible, the Verreibungsantriebseinrichtung with an independent, in particular electromechanical and control-synchronized drive system equip.

According to one Another aspect of the present invention, it is possible, the inking system according to the invention to pre-store a dampening unit, whereby also in this dampening unit the Phase position of the axial stroke movement of one (or more) dampening drive roller (s) across from the axial stroke movement of one of the distributor rollers of the inking unit preferably adjustable adjustable is.

In procedural terms, the task described above also solved by a method according to claim 9th

Thereby is it possible in an advantageous manner as part of the preparation of a print job a favorable attitude the inking unit also with respect to the lifting movement of the distributor rollers determine and then to process the print job with optimized trimming kinematics.

Of the optimal with regard to the color distribution on the respective forme cylinder Adjustment of the Verreibungsantriebseinrichtung can under consideration Numerous image, machine, and color parameters take place whose otherwise only partially conditional is possible.

According to one particularly preferred embodiment the process of the invention is in the context of determining the setting state for the Verreiberantrieb both the for the respective distributor roller most suitably appearing roller stroke, and most suitable in terms of the given color distribution appearing phase offset between the strokes of at least two distributor rollers determined.

It is possible, in the determination of the setting state for the Verreiberantrieb also economic criteria, in particular as far as possible low wear Operation of the inking unit selectable priorities to take into account.

Preferably becomes the method according to the invention as part of a template analysis section preparing for the printing process carried out, so that before or at the initiation of the print job for each Inking optimal setting conditions are determined. It is possible, these setting states in the context of continuous or at certain intervals carried out analysis procedures If necessary, change the print image. Preferably, the change takes place the setting state of the Verreiberantriebs fully automatic under Use of actuators from a central control room without Interruption of printing operation.

It is possible, the for selected the respective print job setting states of the operator drive to save print job-specific and in case to reuse such recurring print jobs.

Further Details and features of the invention will become apparent from the following Description in connection with the drawing. It shows:

1 a schematic representation to illustrate a possible construction of an inking unit with a plurality of distributor rollers, wherein the Hubphasenlage of at least two Verreiberwalzen this inking unit is adjustable to each other adjustable,

2 a schematic representation to illustrate the different strokes and Hubphasenlage the in 1 illustrated, lower and the inking rollers associated Farbreiberwalzen;

3 a perspective sketch for illustrating a manually adjustable Verreiberwalzenantriebseinrichtung, as such, allows adjustment of different Hubphasenlagen the distributor rollers to each other.

In 1 an inking unit for a sheet-fed offset printing machine is shown. This inking unit includes a color box 1 , a color ductor 2 , a color lifter 3 , a spreading roller 4 as well as several complaint rollers 5 , The inking unit also includes several transfer rollers and ink drivers 7a . 7b . 7c . 7d and ultimately on a forme cylinder 9 upcoming inking rollers 8th ,

The color drivers 7a . 7b . 7c . 7d are so out formed so that they are machine synchronously displaceable over a particular not shown in this representation Verreiberwalzenantriebseinrichtung in the axial direction by a certain distance, for example in the range of +/- 20 mm.

In the exemplary embodiment shown here, said distributor roller drive device is designed such that the lifting phase position of at least two inking roller rollers, in particular of the inking roller rollers 7c and 7d adjustable adjustable to each other. Preferably, the Verreibungsantriebseinrichtung is further designed such that in addition to the Hubphasenlage and the stroke amplitude of the respective ink fountain roller 7c . 7d Print job specific is adjustable.

At the inking rollers 7c . 7d As can be seen from the illustration, these are the inking rollers in the ink flow 8th immediately upstream inking rollers. The inking rollers 7a and 7b are closer to the color box when viewed in the direction of color flow. Preferably, the phase position as well as the stroke of each of the ink fountain rollers shown here 7a . 7b . 7c . 7d adjustable adjustable to each other.

In 2 The upper graph g1 illustrates the axial movement of the distributor roller 7c ( 1 ) with respect to the rotational phase angle φ of the forme cylinder 9 ,

The lower graph g2 illustrates the rotational phase position and the axial stroke of the ink driver 7d relative to the angle of rotation φ of the forme cylinder 9 , As can be seen from the illustration, it is possible, in particular the axial stroke, as well as the rotational phase position of the Axialhubbewegung the ink fountain roller 7c adjustable to change.

In 3 is greatly simplified (and essentially only to illustrate a possible form of realization of the inventive concept), a drive system shown, on which in particular the inking rollers 8th (please refer 1 ) upstream distributor rollers 7c . 7d can be driven. The Verreibungsantriebseinrichtung shown here comprises an eccentric structure 10 , which as such can either sit directly on a journal of a printing cylinder, in particular the journal of the forme cylinder, or else via a transmission device, in particular a spur gear can be otherwise coupled to the machine drive.

On the eccentric structure 10 sits a crank rod 11 the with their, the eccentric structure 10 opposite end with a rocker plate 12 is coupled. The rocker plate 12 is mounted pivotably about a storage device not shown here in such a way that this in accordance with the part of the eccentric lever 11 exerted lifting movements can be pivoted about the pivot axis X. The rocker plate 12 is with a positioning groove 13 provided in which a pivot pin 14 can be clamped in a positionally variable manner.

At the pivot pin 14 sits a first condyle 15 a tamper bar 16 , The driver pushrod 16 includes a second condyle 17 that is on a pivoting lever 18 sitting. In accordance with the pivot lever 18 becomes a distributor roller finger 19 tilted about the pivot lever axis Y1. The Verreiberfinger 19 stands over a caster 20 with a driver groove 21 the distributor roller 7d engaged.

A kinematically similar gear train is also for driving the distributor roller 7c intended. This gear train also includes a Verreiberstößelstange 22 , which has a first condyle 23 and a second condyle 24 with the rocker plate 12 or the second pivot lever 25 is coupled. About the second pivot lever 25 becomes the rigidly coupled Verreiberfinger 26 actuated. The second operator finger 26 is about a second roller 27 with the second distributor roller 7c engaged. By Verreibungsantriebseinrichtung shown here, it is possible by pivoting the rocker plate 12 an axial oscillation of the distributor rollers 7c . 7d causing this axial oscillation of the distributor rolls 7c . 7d adjustable in terms of both the phase position and in terms of the effective Axialhubes changeable.

The associated lifting movements are indicated by the arrow symbols incorporated in this drawing. Swiveling the rocker plate 12 in the direction indicated by the black arrowhead pivot direction leads to movements of the other components in the direction indicated by the black arrowheads of the associated arrows directions of movement. Swiveling the rocker plate 12 in the direction indicated by the white arrowhead pivot direction leads to movements of the components according to the directions indicated by the white arrows movement directions.

In the embodiment shown here is the rocker plate 12 in addition to the positioning groove 13 with additional threaded holes 28 .... 32 provided over which the rod ends 15 . 23 the two Verreiberstößelstangen 16 . 22 may be determined in certain fixed items which, as such, take into account certain standard operating conditions. The Verreiberstößelstangen 16 . 22 are formed in this embodiment so that the length is adjustably changed to the Nullhubpo to determine the position of the distributor rollers.

It is possible, the connection structures for connecting the Verreiberstößelstangen 16 . 22 on the rocker plate 12 so to do that both rod ends 15 . 23 in the positioning groove 13 can be locked positionally adjustable. Furthermore, it is also possible, the rod ends 15 . 23 so that they can be mounted Ü overlapping each other (eg 23 on 15 ). It is also possible to provide several parking grooves.

alternative to the illustrated here in particular to illustrate the concept according to the invention, manually adjustable Verreibungsantriebseinrichtung it is possible, form the Verreibungsantriebseinrichtung so that the setting the Axialhubes the respective Verreiberwalze and the Hubphasenlage about actuators takes place, which can be controlled from a central machine control station are.

On Basis of the solution concept according to the invention For example, a convertible trimming insert for different subject framing sets can be realized become. By adjusting the kinematics of the distributor rollers will it be possible a special influence on the color waste as well as any stenciling effects to take. The inking unit according to the invention is particularly suitable for Offset rotary printing machine (Sheet / roll) with conventional roller inking unit (wet or dry offset) according to known construction principles with intermediate rolls, ink drippers, applicator rolls for transmission the ink from the ink fountain (lift or lifeless) to the printing plate in highest Print quality, in particular in terms of Drop in color or template tendency with respect to the different print subjects.

For this are more according to the invention Ink rollers and applicator rollers as well as a trimming insert adjustment preferably present. In the inking unit according to the invention is the Verreibungs-offset manually or possibly also automatically convertible and indeed preferably in a range between 0 ° and 180 ° (π / 2), but optionally also up to 360 ° (π).

Of the Setting state of the inking unit can be based on a variety of Criteria, for example, color drop or stenciling determined and be adjusted. The setting state can preferably under previous evaluation of the printing data of the respective Printing form can be determined.

Of the Verreibungsantrieb can respect Phase position and stroke over a gear train or over a single drive of the ink driver done.

The upper color drivers are in their phase relationship to each other and preferably also adjustable to the lower color driver (e.g. the phase angle of the reversal points and the stroke). It is possible for this upper color driver to provide fixed offsets.

The Adjustment of the entire inking unit is preferably based on the technical data is automated or via control room selection of the operator.

By the inventive concept will be a printing optimization with respect to different Sujets- and customer requirements possible. Based on the concept of the invention can be created a particularly high quality inking, at which due to the filigree adjustment possibilities of the kinematics of the Verreibungswalzen each other special features of each Drucksujets be taken into account. It is possible the inventive setting of the drive drive automatically based on the pre-available technical data so that this does not extend the set-up times the machine enters.

The color drivers have a special influence 7c and 7d (close to the inking rollers 8th ) in terms of print quality. The color drivers 7c . 7d are variably adjustable in terms of stroke and phase position and thus stand in variable different phase position with the inking rollers 8th in contact. Consists between the Axialhubbewegung the two color drivers 7c . 7d the offset angle 0 ° (maximum trimming at the same position), the template inclination is small, but the color drop may be greater than at an offset angle. This can be advantageous in many print jobs. In this setting, during the operation of the printing press, the effect of the trimming insert adjustment on the printing result can be determined, whereby, as part of the continued printing operation, an optimization with respect to the subject is made possible by laying the trimming insert point (motorized or manual).

Becomes the offset offset is chosen to be significantly greater than 0, e.g. Delta φ = about 180 °, so will the color drop over the arc circumference significantly lower than at an offset of 0 °, simultaneously however, the template tilt is also higher and the adjustable trimming insert becomes less effective if it is adjusted. The applicator rolls can be set fixed or iridescent (also partially).

Here are the color drivers 7c . 7d (if necessary, the third 7b or fourth 7a ) either mechanically fixed via a gear train or individually controlled drivers are provided, which are rotationally controlled in phase relation to the plate cylinder (channel or channelless), eg by the machine control.

The Printing form is known by appropriate data in its form (subject), or corresponding data in the work preparation station or entered or set at the control station of the machine itself.

In the simplest version, a manual switching operation between the rubbers 7a . 7b made, offset changeover 0 ° → 180 ° → 0 °, depending on the optimization of the printing technique or the existing printing form.

Of the Trimming insert becomes clearly effective in the offset position 0 ° and can be subject Optimized chosen become. The data from the prepress allow a prefix and Setting the trimming application point.

deposited Allow computational algorithms (control station, work preparation stations) an adjustment of the machine with respect to offset offset angle, Trituration point, Verreibungshub automated with respect to existing printing form (subject) or the technical printing data, or by scanned print sample or measured print sample on the measuring table (for example X-Y table) and their optimization in the pressing process and quality assurance process in progress.

This in terms of can also one or more dampers to the phase position of the plate cylinder (DA or channel) are controlled. In this case, the dampening drive drive done by the machine or individually controlled.

Of the Dampener leaves also regarding his Control peripheral speed differently (angle-dependent) (Channel / pressure surface) to influence the occurrence of any channel strips.

In realizing the driver drive means using a rocker plate, it is possible to select the attachment point of the ram to the rocker plate so that a dead center of the lever system formed as such by the ram push rod and the rocker plate is traversed as the rocker plate oscillates. This results in a smaller Hubamplitude doubling the stroke frequency of the corresponding Verreiberwalze. Such a setting is particularly suitable for driving the in 1 illustrated distributor roller 7c ,

1

paintbox

2

ink fountain roller

3

color Heber

4

Aufstreichwalze

5

rider roll

6

Transfer roll

7a

ink distributor

7b

ink distributor

7c

ink distributor

7d

ink distributor

8th

applicator roll

9

form cylinder

10

eccentric structure

11

Cam

12

rocker plate

13

adjusting groove

14

first pivot pin

15

first joint head

16

Verreiberstößelstange

17

joint head

18

pivoting lever

19

Verreiberfinger

20

caster

21

drive slot

22

Verreiberstößelstange

23

joint head

24

joint head

25

pivoting lever

26

Verreiberfinger

27

caster

28-32

fixing points

Claims (14)

Inking unit for an offset printing machine with: - several applicator rollers ( 8th ) attached to a forme cylinder ( 9 ), - a first and a second, the applicator rollers ( 8th ) in the color flow in each case upstream Verreiberwalze ( 7c . 7d ), - further, in the color flow upstream of the distributor rollers ink rollers ( 6 . 5 . 4 . 3 . 2 as such serving to effect the ink supply from an inking area, and - a driving drive means for effecting the axial movement of the distributor rollers ( 7c . 7d ), Wherein the Verreibungsantriebseinrichtung is formed such that the phase position of the lifting movement of the first Verreiberwalze ( 7c ) relative to the lifting movement of the second distributor roller ( 7d ) is adjustable adjustable. Inking unit according to claim 1, characterized that the phase angle is infinitely variable. Inking unit according to claim 1 or 2, characterized characterized in that the phase position in an angular range of at least π / 2 is adjustable adjustable. Inking unit according to at least one of claims 1 to 3, characterized in that the position of the reversal points adjustable is. Inking unit according to at least one of claims 1 to 3, characterized in that the Verreibhub adjustable adjustable is. Inking unit according to at least one of claims 1 to 5, characterized in that the drive of the distributor rollers ( 7c . 7d ) via a common gear train. Inking unit according to at least one of claims 1 to 6, characterized in that for each distributor roller ( 7c . 7d ) An independent drive train is provided. Inking unit according to at least one of claims 1 to 7, characterized in that the inking upstream of a dampening unit is and that the phase position of the axial stroke of one or more meherer Dampening drive rollers of the dampening unit for the axial lifting movement of a the Verreiberwalzen the inking adjustable adjustable is. Method for determining a setting state an inking unit in which the color distribution of the Picture on one for the relevant inking authoritative Print form indicative data by means of a processing procedure and / or an inline pressure control unit are evaluated, and the inking unit Settings as required the evaluation results are made, the processing procedure is designed such that in its frame a setting state for a Verreiberantriebseinrichtung is determined. Method according to claim 9, characterized in that that is most appropriate in terms of color distribution Roller stroke for the respective distributor roller is determined. Method according to claim 9 or 10, characterized that is most appropriate in terms of color distribution Phase offset between the strokes of at least two distributor rollers is determined. Method according to at least one of claims 9 to 11, characterized in that the determination of the setting of the operator drive under selectable priority the low wear the distributor rollers takes place. Method according to at least one of claims 9 to 12, characterized in that the setting of the Verreiberantriebs using actuators is made by a control system are controlled from. Method according to at least one of claims 9 to 13, characterized in that both the adjustment of the operator drive, as well as the setting values of the adjustable, axial oscillation the inking rollers storable and repeatable job specific job is available.