JP2007223317A - Ink arrangement and method for adjusting each pattern of organization state of the ink arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide solution means especially for problems on waste of ink and ghost effects while ink transfer is enabled to be carried out to a printing plate from an ink fountain area. <P>SOLUTION: An ink arrangement for offset press is equipped with a plurality of inking rollers (8) abutting against a plate cylinder (9); first and second ink swinging rollers (7d, 7c) respectively positioned before the inking rollers (8) in an ink flow; further inking rollers (6, 5, 4, 3, 2) which are positioned before the ink swinging rollers (7d, 7c)and used for executing ink feed from an ink discharge area; and an ink swinging driver for executing axial movement of the ink swinging roller. The ink swinging roller is composed so that a phase position of stroke movement of the second ink swinging roller (7c) becomes variable to be set to the stroke motion of the first ink swinging roller (7d). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inking device for a printing press, and more particularly to a roller inking device for an offset rotary printing press for processing a printing material by a sheet-fed printing method or a rotary printing method. Furthermore, the present invention also relates to a method for adjusting the configuration state of the inking device for each picture.

  Ink devices for offset printing machines typically have a plurality of rollers for performing ink transfer. Through these rollers, each printing ink can be transferred sufficiently uniformly to the printing plate. These inking devices can be implemented, for example, with multiple rollers = ink devices or ink reservoir = ink devices. The amount of printing ink injected into the first roller (e.g. a doctor roller) of the inking device can be set via an ink knife (or an ink pusher). The distance from the ink knife (or ink pusher) to the roller is variable by a control key and an ink key (Regulier-und Zonenschrauben). The metering gap defined between the ink knife and the roller is set to different gap sizes for each zone within the plate width, so that different ink consumption may be taken into account in each zone. become able to. Such region-specific ink consumption can be determined in advance based on data for each picture. Within these inking devices, a roller named “Ink Shaking Roller (Verreiber)” is usually further provided. During the rotation, these ink shaking rollers are also moved axially around their longitudinal axis, and at that time, the printing ink is moved and shaken in the lateral direction within the corresponding roller gap.

  In the case of an ink apparatus that is generally widespread, the stroke of the ink swing roller is variable so as to be settable. For example, when fine characters and the entire surface (Vollflaeche) are adjacent to each other, or when a plurality of inks are introduced adjacent to each other in divided ink fountains, a person skilled in the art visually checks a specific pattern. Changes can also be made.

  The object of the present invention is to make it possible to transfer ink from the ink fountain area to the printing plate in a way that is particularly suitable for each picture, and in particular in particular the waste of ink and the ghost effect. It is to provide a solution that can counter this problem.

According to the present invention, the above problem is an inking device for an offset printing machine,
A plurality of form rollers in contact with the plate cylinder;
First and second ink swing rollers respectively preceding the above-mentioned form rollers in the ink flow;
An additional ink roller that is placed in front of the ink swing roller in the ink flow, the ink roller being used to perform the ink supply from the ink metering area;
In an ink apparatus comprising: an ink shaking drive device for performing axial movement of an ink shaking roller;
The ink swing drive device is configured such that the phase position of the stroke motion of the first ink swing roller (in the printing direction) can be set variable with respect to the stroke motion of the second ink swing roller (in the print direction). It is solved by an inking device, characterized in that it is constructed.

  This is an inking device for an offset printing press, which optimizes the printing technique with respect to various patterns and customer requirements by setting the swing motion of at least two ink swing rollers of the inking device relative to each other. It is possible in a preferred manner to provide an inking device that can be achieved. Based on the concept according to the present invention, an inking device, wherein the problems relating to ink waste and ghost tendency are reduced by setting the swinging motion of the ink swing roller relative to each other, It becomes possible to provide.

  The inking device according to the present invention can be configured such that the setting of the ink shaking drive device is performed completely automatically using an adjustment gear (Stelltrieben). In this case, the setting of the inking device according to the present invention is performed without extending the preparation time that occurs when the print job (Druckauftrag) is switched.

  According to one particularly preferred embodiment of the present invention, the inking device is configured such that the phase position of the ink swing rollers is continuously variable with respect to each other. In particular, it is possible to correspond to the setting of a predetermined inking device in consideration of the characteristics of the frequently appearing pattern by means of a preset setting point (Einstellpunkte).

  It is preferable that the phase positions of the stroke motions of at least two ink swing rollers with respect to each other can be set in an angle range of at least π / 2. However, the ink shaking drive device can also be configured such that the phase position is variable in an angle range up to 2π (360 °).

  According to a special aspect, the ink swing drive device according to the present invention is configured not only to be able to set the stroke position of the ink swing roller relative to each other but also the stroke of each ink swing roller itself in a configurable manner. ing. Therefore, in particular, it is possible to set the ink swing stroke of the first ink swing roller (seen in the printing direction) to be larger than the stroke of the second ink swing roller (seen in the print direction).

  It is possible to configure the ink shaking drive device so that the ink shaking roller is driven via a common drive train, in particular a common main cam (Hauptexzenter). However, it is alternatively possible to configure the ink drive device such that an independent drive train is provided for each ink roller. It is also possible to configure the ink shaking driving device so that the ink shaking driving device is operated in synchronization with the printing press. In so doing, the driving force is branched off from the drum or cylinder drive system along a mechanical path. Alternatively, it is also possible to provide the ink drive with a unique drive system that is synchronized in particular electromechanically and in control engineering.

  According to a further aspect of the invention, it is possible to place a dampening device in front of the inking device according to the invention. At this time, also in the case of this dampening device, the phase position of the axial stroke motion of one (or a plurality) dampening roller (Feuchtreibwalze) is the axial stroke of one of the ink shaking rollers of the inking device. It is preferably variable so that it can be set for the exercise.

  From the viewpoint of method technology, the above-mentioned problem can also be solved by the method according to claim 9.

  This establishes the preferred setting of the inking device with respect to the stroke motion of the ink roller within the scope of preparing the print job, and subsequently performs the print job with optimized ink roller kinematics Is possible in a suitable way.

  Optimum setting of the ink shaking driving device with respect to the ink distribution of each plate cylinder can be performed in consideration of many image area parameters, printing machine parameters, and ink parameters. Otherwise, there is a limit to allow the parameters to be considered together in this way.

  According to a particularly preferred embodiment of the method according to the invention, it is optimal for the roller stroke, which is considered optimal for each ink roller, and for a given ink distribution, within a range which defines the setting state for the ink roller drive. The phase shift between the stroke motions of the at least two ink swing rollers is determined.

  When determining the setting state for the ink swing roller drive, it is possible to consider an economic standard, in particular, a priority order that can be selected from the viewpoint of operating the inking device so that wear is as low as possible. .

  The method according to the invention is carried out within the scope of the composition analysis steps (Vorlagenanalyseabschnittes) that are prepared during the printing process, so that for each inking device before or during the introduction of the print job It is preferable that the optimum setting state has already been determined. These setting states can be changed in some cases within the range of the analysis procedure of the print image line unit executed continuously or at a predetermined time interval. It is preferable to change the setting state of the ink swing roller drive completely automatically from the central control stand using the adjustment gear without interrupting the printing operation.

  The setting state of the ink swing roller driving selected for each print job is stored for each print job, and can be used again when the same print job appears again.

  Further details and features of the present invention will become apparent from the following description taken in conjunction with the drawings.

  FIG. 1 shows an inking device for a sheet-fed offset printing press. This inking device has an ink fountain 1, an ink doctor roller 2, an ink transfer roller 3, an application roller (Aufstreichwalze) 4, and a plurality of rider rollers 5. The inking device further includes a plurality of transfer rollers 6, ink swing rollers 7 a, 7 b, 7 c, and 7 d, and an ink form roller 8 that is in contact with the plate cylinder 9.

  The ink swing rollers 7a, 7b, 7c, and 7d are synchronized with the printing press by an ink swing drive device not shown in detail in FIG. 1 by a predetermined path in the axial direction, for example, within a range of ± 20 mm. It is configured to be movable.

  In the embodiment shown in FIG. 1, the so-called ink swing drive device is configured in such a way that the stroke phase positions of at least two ink swing rollers, in particular the ink swing rollers 7c and 7d, are settable and variable with respect to each other. ing. It is preferable that the ink swing drive device is further configured so that the stroke amplitude of each ink swing roller 7c, 7d can be set for each print job in addition to the stroke phase position.

  As can be seen from FIG. 1, the ink swing rollers 7c and 7d are ink swing rollers that are directly placed on the ink form roller 8 in the ink flow. The ink swing rollers 7a and 7b are located closer to the ink fountain when viewed in the ink flow direction. It is preferable that the phase positions and strokes of the ink swing rollers 7a, 7b, 7c, and 7d shown in FIG.

  The upper graph g1 in FIG. 2 shows the axial movement of the ink swing roller 7c (FIG. 1) with respect to the rotational phase angle ψ of the plate cylinder 9.

  The lower graph g2 shows the rotational phase position and axial stroke of the ink swing roller 7d with respect to the rotational angle ψ of the plate cylinder 9. As can be seen from this figure, the axial stroke of the ink swing roller 7c and the rotational phase position of the axial stroke motion can be changed to be settable.

  FIG. 3 shows a simplified drive system (and generally the concept according to the invention) that can drive the ink swing rollers 7c, 7d that are in front of the ink form roller 8 (see FIG. 1). Only for the purpose of illustrating possible embodiments). The ink swing drive device shown in FIG. 3 has an eccentric structure 10. This eccentric structure may be located directly in the journal of the printing cylinder, in particular the journal of the printing cylinder, as such, or alternatively via a transmission, in particular a cylindrical gear. You may be connected with the drive part.

  A crank rod 11 is located in the eccentric structure 10. The crank rod is connected to the vibrating arm plate 12 at the end opposite to the eccentric structure 10. The vibration arm plate 12 is supported by a bearing device not shown in detail in FIG. 3 so as to be capable of vibration movement, and is thereby vibrated around the vibration axis X in accordance with a stroke movement applied on the cam lever 11 side. To get. An adjustment groove 13 is provided in the vibration arm plate 12. In this adjustment groove, the pivot pin 14 can be tightened in a variable position.

  The first pivot head 15 of the ink swing roller push rod 16 is located on the pivot pin 14. The ink swing roller push rod 16 has a second pivot head 17, which is located on the swing lever 18. According to the swing lever 18, the ink swing roller finger 19 tilts around the swing lever axis Y1. The ink swing roller finger 19 is in engagement with the driving slot 21 of the first ink swing roller 7d via the first track roller 20.

  A drive train similar in kinematics is provided for driving the second ink swing roller 7c. The drive train similarly has an ink swing roller push rod 22. The ink swing roller push rod 22 is connected to the vibrating arm plate 12 or the second swing lever 25 via the first pivot head 23 and the second pivot head 24. The second swing lever 25 is operated by an ink swing roller finger 26 that is fixedly connected to the second swing lever. The second ink swing roller finger 26 is in a fitted state with the second ink swing roller 7 c via the second track roller 27. An ink swing drive device (not shown) can vibrate the ink swing rollers 7c and 7d in the axial direction by swinging the vibration arm plate 12. In this case, such axial vibrations of the ink swing rollers 7c and 7d are variable so as to be set with respect to the phase position and the effective axial stroke.

  Corresponding stroke movement is indicated by the arrow symbols shown together in the figure. When the vibrating arm plate 12 swings in the swing direction indicated by the black arrow tip, the other components are consequently indicated by the black arrow tips of the correspondingly arranged arrows. It will move in the direction of movement. When the vibrating arm plate 12 swings in the swing direction indicated by the tip of the white arrow, the component moves as a result in the direction of motion indicated by the white arrow.

  In the embodiment shown in the figure, the vibrating arm plate 12 has further threaded holes 28 to 32 in addition to the adjusting groove 13. Through these threaded holes, the pivot heads 15 and 23 of the ink swing roller push rods 16 and 22 can be fixed at predetermined fixed positions. This fixed position takes into account standard operating conditions. In the case of this embodiment, the ink swing roller push rods 16 and 22 are configured so that the length thereof can be set in order to fix the zero stroke position of the ink swing roller.

  The connecting structure for connecting the ink swing roller push rods 16 and 22 to the vibrating arm plate 12 may be configured so that both the pivot heads 15 and 23 can be restrained in the adjustment groove 13 in a variable state. Is possible. Furthermore, the pivot heads 15, 23 can also be configured such that they can be mounted one on top of the other (for example 23 above 15). It is also possible to provide a plurality of adjustment grooves.

  In this figure, in order to clarify the concept according to the present invention, the ink shaking drive device is replaced with a manually set ink shaking drive device, and the axial stroke and stroke phase position of each ink shaking roller are shown. It is also possible to configure so that the setting is performed by an adjustment gear. These adjustment gears are centrally controlled by a printing press control station.

  Based on the concept of the solution according to the invention, it is possible to realize a switchable ink shaker for different pattern-ink shake offsets. By setting the kinematics of the ink roller, it is possible to have a special influence on the ink waste and possibly the ghost effect that occurs. The inking device according to the present invention is for transferring printing ink from an ink groove (with or without doctor) to an ink plate so as to obtain high print quality particularly from the viewpoint of ink waste or ghost effect with respect to various printing patterns. It is particularly suitable for an offset rotary printing press (sheet / roll paper) having a conventional roller inking device (wet offset or dry offset) based on a known construction principle with an intermediate roller, an ink swing roller and a form roller.

  Therefore, in the present invention, it is preferable that a plurality of ink swing rollers, a form roller, and an ink swing start setting device (Verreibungseinsatzverstellung) are provided. In the case of the inking device according to the invention, the ink roller-offset is manual or in some cases automatic, preferably in the range 0 ° to 180 ° (π / 2), in some cases 360 ° (π). In the range up to, it is possible to switch.

  The setting state of the inking device can be determined and set based on various criteria, such as ink waste or ghosting. The setting state is preferably determined by preliminarily evaluating data on the printing technique of each printing plate.

  The ink roller can be driven by a drive train or an individual driver of the ink roller with respect to the phase position and stroke.

  The phase positions of the upper ink swing rollers can be set with respect to each other, and preferably also with respect to the lower ink roller (for example, particularly with respect to the turning point and the phase position of the stroke). It is possible to set a fixed offset angle with respect to the upper ink shaking roller.

  The setting of the entire inking device is preferably made on the basis of data on the printing technique, either automatically or by selection by an operator at a control stand.

  The concept according to the invention makes it possible to optimize the printing technique for various pictures and customer requirements. On the basis of the concept according to the invention, a particularly expensive inking device can be provided. In this inking device, the kinematics of the ink swing roller can be set finely with respect to each other, so that the particularity of each printed picture can be taken into consideration. The setting of ink shaking driving according to the present invention can be automatically performed based on data on printing technology that is available in advance. As a result, the preparation time of the printing press is not extended.

  The ink swing rollers 7c and 7d (in the vicinity of the ink form roller 8) particularly affect the print quality. The ink swing rollers 7c and 7d can be variably set with respect to the stroke and the phase position, and thus contact the ink form roller 8 at various variable phase positions. When an offset angle of 0 ° is established between the axial strokes of the two ink swing rollers 7c and 7d (maximum swing at the same position), the ghost is reduced, but in some cases the ink wasted is at a predetermined offset angle More than. This can be suitable for many print jobs. In such a setting, during the operation of the printing press, it is possible to confirm the effect that the ink swing roller start has on the printing result, and within the range of the continuous print operation, the ink swing start point (motor By shifting (by or manually), it is possible to optimize the picture.

  If the ink swing offset is clearly chosen to be greater than 0, for example, if delta ψ = approximately 180 °, the ink waste at the periphery of the sheet is significantly less than in the 0 ° offset case. However, at the same time, the ghost increases, and even if a settable ink shaking start setting device is set and used, there is almost no effect. In this case, the form roller can be set to be fixed or to perform a side-to-side movement (may be partial).

  In this case, the ink swing rollers 7c and 7d (in some cases, the third ink swing roller 7b or the fourth ink swing roller 7a) are mechanically fixedly connected by a drive train or a plate cylinder (having a groove, Alternatively, it is possible to provide an individually controlled ink swing roller whose phase position with respect to (no groove) is controlled to be rotationally driven by, for example, a printing press controller.

  The printing plate is identified by the corresponding data of the plate (picture). Alternatively, the corresponding data is input or set at the work preparation station or the control stand of the printing press itself.

  In a very simple embodiment, there is a manual switching step in which the offset between the ink swing rollers 7a and 7b is switched from 0 ° to 180 ° to 0 ° according to optimization in printing technique or the printing plate currently used. Done.

  The start of ink shaking is extremely effective at an offset position of 0 °, and can be selected by optimizing the pattern. According to the data in the pre-printing stage, the ink shaking start point can be selected and set in advance.

  A pre-set calculation algorithm (control stand, work preparation station) can be used automatically for data on currently used printing plates (pictures) or printing techniques, or scanned printing samples or plates (eg From the viewpoint of optimizing the printing sample measured on the XY plate) and the printing sample during the printing start process and the quality stabilization process in continuous printing, the ink shaking offset angle, the ink shaking start point, and the ink shaking Allows you to set the press for stroke.

  In this regard, one or more dampening rollers can be controlled with respect to the phase position of the plate cylinder (DA or groove). In that case, the dampening roller is driven by a printing press or separately controlled.

  The dampening roller can also be controlled differently (depending on the angle) with respect to the circumferential speed (groove / printing surface) in order to interfere with the possible groove stripes (Kanalstreifen).

  When the ink swing drive device is realized by using the vibration arm plate, the connection point of the ink swing roller push rod to the vibration arm plate is changed so that the dead point of the lever system becomes the dead point of the lever system when the vibration arm plate vibrates. It is possible to choose to be formed and passed by a vibrating arm plate. Thereby, when the stroke amplitude is small, the stroke frequency of the corresponding ink shaking roller is doubled. This setting is particularly suitable for driving the ink swing roller 7c shown in FIG.

Schematic for illustrating one possible configuration of an inking device comprising a plurality of inking rollers, wherein the phase position of at least two inking rollers of the inking device is settable and variable with respect to each other FIG. FIG. 2 is a schematic view for illustrating various strokes and stroke phase positions of the ink swing roller shown in FIG. 1 provided corresponding to the ink form roller. FIG. 4 is a schematic perspective view for illustrating a manually settable ink shaking drive device that allows various stroke phase positions of ink shaking rollers to be set with respect to each other.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ink fountain 2 Ink doctor roller 3 Ink transfer roller 4 Application roller 5 Rider roller 6 Transfer roller 7a (Fourth) Ink roller 7b (Third) Ink roller 7c (Second) Ink roller 7d (First) Ink swing roller 8 Inking roller 9 Plate cylinder 10 Eccentric structure 11 Crank rod (cam lever)
12 vibration arm plate 13 adjustment groove 14 first pivot pin 15 second pivot head 16 ink swing roller push rod 17 pivot head 18 swing lever 19 ink swing roller finger 20 first track roller 21 driving slot 22 ink swing roller Push rod 23 Pivot head 24 Pivot head 25 Swing lever 26 Ink swing roller finger 27 Second track roller 28 Fixed position 29 Fixed position 30 Fixed position 31 Fixed position 32 Fixed position

Claims (14)

An inking device for an offset printing machine,
A plurality of application rollers (8) in contact with the plate cylinder (9);
A first ink shaker roller (7d) and a second ink shaker roller (7c) respectively placed in front of the form roller (8) in the ink flow;
Further ink rollers (6, 5, 4, 3, 2) placed in front of the ink swing rollers (7d, 7c) in the ink flow, used to carry out ink supply from the ink ejection area , Ink roller,
In an ink apparatus comprising: an ink shaking driving device for performing an axial movement of the ink shaking roller (7d, 7c),
The ink shaking driving device is configured such that the phase position of the stroke motion of the second ink shaking roller (7c) is variable so as to be set with respect to the stroke motion of the first ink shaking roller (7d). An inking device, characterized in that The inking device according to claim 1,
An inking device, wherein the phase position is variable steplessly. In the inking device according to claim 1 or 2,
An inking device characterized in that the phase position is variable so as to be set within an angle range of at least π / 2. In the inking device according to any one of claims 1 to 3,
An inking device characterized in that the position of a turning point can be set. In the inking device according to any one of claims 1 to 3,
An inking device characterized in that the ink swing roller stroke is variable to be settable. In the inking apparatus according to any one of claims 1 to 5,
An inking device characterized in that the ink swing rollers (7d, 7c) are driven by a common drive train. The inking device according to any one of claims 1 to 6,
An inking device, wherein a unique drive train is provided for each of the ink swing rollers (7d, 7c). In the inking device according to any one of claims 1 to 7,
The inking device is preceded by a dampening device, and the phase position of the axial stroke movement of one or more dampening rollers of the dampening device is one of the inking rollers of the inking device. An inking device characterized in that it is settable and variable with respect to two axial stroke movements. A method for determining the setting state of an inking device,
The display data is evaluated by the processing procedure and / or inline printing control unit with respect to the ink distribution of the image area on the printing plate associated with each inking device,
In the inking apparatus, in the method of setting according to the evaluation result,
A method, characterized in that the processing procedure is carried out within a set position range for an ink shaking drive device. The method of claim 9, wherein
A method characterized in that, for each said ink roller, a roller stroke that appears to be most suitable for ink distribution is determined. The method according to claim 9 or 10, wherein
Determining a phase shift between the stroke motions of at least two of the ink swing rollers, which appears to be most suitable for ink distribution. 12. The method according to any one of claims 9 to 11, wherein
A method according to claim 1, wherein the setting of the ink swaying drive is performed based on a selectable priority of insufficient wear of the ink swaying roller. The method according to any one of claims 9 to 12,
A method according to claim 1, wherein the setting of the ink drive is performed using an adjustment gear, the adjustment gear being controllable by a control system. The method according to any one of claims 9 to 13,
A method characterized in that both the setting of the ink roller driving and the setting value of the axial lateral movement of the ink form roller can be stored in a printable and reproducible state for each print job.

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