EP2581226B1 - Printing press and method for engaging at least one colour deck cylinder - Google Patents

Description

The invention relates to a printing machine and a method for hiring at least one inking cylinder.

To process print jobs, it is necessary to set cylinders of a printing unit against each other. In particular, in printing machines for high-pressure process, therefore, the use of variable, that is continuously adjustable Anstellmechanismen known. The employment of the printing cylinder with such Anstellmechanismen can be time consuming. However, the correct positioning positions significantly influence the print result.
It is often necessary to put pressure cylinders back from each other. Only in this way maintenance, repair and cleaning work can be carried out and cylinders or printing plates can be changed. The time associated with the on and off of the printing cylinder time is often perceived as too high.

The DE 103 20 764 A1 proposes to detach a part of the bearing block from the moving spindle drive. The arrangement therefore comprises an eccentric closure for firmly connecting or disconnecting the spindle nut housing and the bearing block. In the released state, the bearing block can be moved manually on rails, so that casually a Druckzylinderhüise axiai can be deducted from the printing cylinder.

Therefore, the beats EP 1 310 360 B1 in front. Initially set relative positions of printing cylinders manually with a coarse and fine adjustment and then automatically switch on and off. The presented in this document device solves the above-mentioned problem of time. However, the device presented there requires a variety of high quality components and is therefore expensive.
For this reason, the object of the present invention is to propose a printing press and a method for employment at least one inking cylinder, which are less expensive to implement.

• Zunächst einen Anstellmechanismus zur variablen Einstellung der Relativposition. Ein solches Anstellsystem kann ein hoch entwickelter Anstellmechanismus mit exakten Gewindespindeln sein, bei dem die Motoren mit Drehgebern ausgestattet sind und/oder der Drehmoment bildende Strom überwacht wird. In der EP 1 249 346 A wird ein Anstellsystem für eine größere Flexodruckmaschine gezeigt. Die Bewegung der Schlitten kann mit solchen Systemen sehr exakt und auch - wie erwähnt - in geregelter Form eingestellt werden. Insbesondere bei kostengünstigeren Systemen ist es jedoch vorteilhaft, gleich zwei Anstellmechanismen zur variablen Einstellung der Walzenposition vorzusehen. Diese können in einem Grobeinstellmechanismus bestehen, der beispielsweise eine Gleitführung umfasst. Die Anstellung mit Hilfe dieses Mechanismus kann dann beispielsweise manuell durch Heranschieben des Farbwerksbocks in eine Endposition oder in die Umgebung einer Endposition vorgenommen werden. Die Arretierung der auf diese Weise eingestellten (Vor)Position kann mit einem Halteelement geschehen. Als solches kommt beispielsweise ein Klemmmechanismus in Frage.

This object is solved by the claims 1 and 13.
Accordingly, a printing press according to the invention contains at least one inking unit (it may therefore also be a printing unit or a "printing block" or "printing stand"). Such an inking unit contains a positioning system, which can contain various setting mechanisms:

• First a setting mechanism for variable adjustment of the relative position. Such an adjustment system may be a sophisticated threaded spindle engagement mechanism in which the motors are provided with encoders and / or the torque producing current is monitored. In the EP 1 249 346 A An adjustment system for a larger flexographic printing machine is shown. The movement of the carriages can be adjusted with such systems very accurately and also - as mentioned - in a controlled manner. In particular, in the case of less expensive systems, however, it is advantageous to provide two adjusting mechanisms for the variable adjustment of the roller position. These may consist of a coarse adjustment mechanism comprising, for example, a sliding guide. The employment with the help of this mechanism can then be made for example manually by pushing the Farbwerksbocks into an end position or in the vicinity of an end position. The locking of the set in this way (Vor) position can be done with a holding element. As such, for example, a clamping mechanism comes into question.

According to the invention, a first adjusting mechanism, which allows a variable, generally stepless adjustment of a position, intended. For example, a spindle that rotates in a thread (bearing) can take over this part. If such a spindle adjustment is used in addition to a sliding mechanism ("two first Anstellmechanismen"), then the sliding mechanism should advantageously allow a first coarse adjustment and take over the adjustment mechanism with the spindle fine adjustment. The thread or the bearing of the spindle can already serve as a holding element of the Spindelanstellmechanismus.
The further second adjusting mechanism then takes over the faster on and off of the at least one cylinder (in the previously set printing position and out of this). Often it is sufficient if exactly the starting position is reached again during the employment and if different parking positions are reached with repeated shutdown operations. However, it can also be reached an exact Anstellposition and a parking position again. Advantageously, spring force can be used in particular when reaching the parking position.
According to the invention, the further second adjusting mechanism includes a multiple eccentric. It is advantageous to use an eccentric for employment of several cylinders in inking works, in which several cylinders are employed against each other. This can happen with multiple eccentrics. When using multiple eccentrics according to the invention for this purpose, an eccentric disk can be assigned to each cylinder or the inking unit associated with this cylinder. An inking block is a device that carries at least one bearing of a cylinder. As a rule, an inking cylinder has two such blocks each to one of its end sides, so that the position of the cylinder can be optimized on each side. However, there are also known presses with a block for a cylinder. It is advantageous to arrange eccentric on Farbwerksböcken.
In various printing processes, it is necessary to make several printing cylinders against each other in a printing unit. For example, offset printing often involves positioning a plurality of printing or dampening solution-transporting cylinders. However, the present invention can be used even more advantageously in connection with flexographic printing machines.

As a rule, a format cylinder (which carries the flexible print image), an anilox roller against each other and against a counter-pressure cylinder. Under such conditions (here two displaceable cylinders are employed against a stationary cylinder), it is advantageous if the eccentric on the middle of the cylinder to be positioned relative to each other is appropriate. Advantageous is the use of inking blocks, which are movable on slide rails. The at least one eccentric can be driven by a cylinder operated with a pressurized medium. These include pneumatic and hydraulic cylinders. Alternatively or in addition, among other motorized, especially electromotive drives come into question.

Fig. 1

Seitenansicht eines Ausführungsbeispiels einer erfindungsgemäßen Druckmaschine, wobei einige Bauteile im Schnitt dargestellt sind

Fig. 2

Die Seitenansicht aus Figur 1 ohne Schnittdarstellungen

Fig. 3

Draufsicht auf einige Bauteile aus Figur 1

Fig. 4

Einige Bauteile in der Ansicht A-A aus Figur 3

Further embodiments of the invention will become apparent from the description and the claims.
The individual figures show:

Fig. 1

Side view of an embodiment of a printing machine according to the invention, wherein some components are shown in section

Fig. 2

The side view FIG. 1 without sectional views

Fig. 3

Top view of some components FIG. 1

Fig. 4

Some components in the AA view FIG. 3

Fig. 1 shows a side view of an embodiment of a printing machine 9 according to the invention, wherein a part of the illustrated components is shown in sectional view. FIG. 2 shows the same view without cut parts.
In the in the FIGS. 1 and 2 illustrated printing machine 9 is a flexographic printing machine, in which a color receiving cylinder 1 takes color from an ink tray, not shown, and transfers to an anilox roller 2. In flexographic printing often doctoring chambers are used for coloring rollers, which also does not stand in the way of the application of the invention.
In the embodiment shown, the two rollers 1, 2 are supported by the anilox block 3. The anilox roller transfers in the salaried state ink to the format cylinder 4, which prints the substrate, not shown, which runs between the format cylinder 4 and the counter-pressure roller 5 therethrough.
The printing press 9 is largely supported by a console 8. At her the rail 7 is fixed for the format cylinder block 6. On the format cylinder block 6, the rail 10 is fixed to the anilox block 3.

An arrangement in which different blocks 3, 6 are mounted on each other, is often called piggyback arrangement. There are also known inking arrangements in which the guides or rails 7, 10 of the blocks 3, 6 are guided independently of each other. The present invention can be used advantageously in both types of inking.
FIG. 3 shows an enlarged sectional view of Anstellsystems 13. This Anstellsystem allows a coarse and a fine adjustment of the two inking blocks (with the first Anstellmechanismen) and it has a second second Anstellmechanismus, with in this case both Farbwerksböcke 3, 6 in the preset Anstellsituation addition and be brought back into it.
The machine operator solves the clamping 42 for the format cylinder block 6 by pressing the lever 40. The clamp 42 can now slide freely on the tube 44 and the format cylinder block 6 itself can on the rail 7 free manually be moved. The machine operator closes the clamp 42 again when the format cylinder block 6 has approximately reached its position.
One could therefore summarize that the first adjustment mechanism, with which the coarse adjustment is made here, mainly includes the temporarily displaceable clamp 42 and the tube 44. Of course, it also requires the described coarse adjustment of the machine operator and the rail 7, on which the format cylinder block 6 slides.
The machine operator makes the fine adjustment by turning the handwheel 41. With the hand wheel 41, the spindle 47 of the format cylinder fine adjustment mechanism is rotated in the tube 44. In the bearing block 45, the spindle 47 is mounted, and it has just before its end a thread 46 which is connected to the tube 44. The rotation of the spindle 47 causes an axial movement of the tube 44. This movement of the tube 44 is transmitted via the clamping 42, the bearing plate 48 and the eccentric holder 30 on the format cylinder bearing block 6. The format cylinder bearing block 6 slides during this movement again on the rail 7. Now both the coarse and the fine adjustment of the format cylinder 4 are made.

At this point it can be summarized that the further first adjustment mechanism of the embodiment shown, with which the described fine adjustment has been made, in particular the spindle 47, the thread 46 and the tube 44 is required. Also in the context of this adjustment mechanism, a machine operator and the rail 7 are necessary to effect the fine adjustment of the position of the format cylinder block 6. With the two described first adjustment mechanisms, the position of the format cylinder block 6 is infinitely adjustable,
The setting of the position of the anilox roller 2 is then analog and requires no further explanation in view of the figures and the list of reference numerals.
To mention still remains that the FIGS. 1 and 2 show the operator side of the printing press 9. On the other side (drive side) of the illustrated printing press 9, stands 3, 6 and adjusting mechanisms can be seen, which correspond functionally to those shown in the figures.
The other second adjusting mechanism, especially in FIG. 3 can be seen, is first firmly connected to the tube 44 with the clamp 42 for the Formatzyllnderbock on the bearing plate 48 when the clamp is closed. In the bearing plate 48, the eccentric 33 rotates when the circular cylindrical eccentric spindle 31 is rotated. On the opposite side of the circular cylindrical eccentric spindle 31, the eccentric disk 32 is mounted. This eccentric rotates in the bearing plate 28 for the eccentric disc 32 and causes in the manner described below, an additional movement of the anilox roller. 3
The eccentric holder 30 has holes through which the circular cylindrical eccentric spindle 31 engages, so that it is rotatably mounted in the eccentric holder 30 in this manner. The central region of the circular cylindrical eccentric spindle 31 in the axial direction is clamped in a clamping piece 34. The clamping piece has a lever 35 with a linkage 36.

• Die Teile des Doppelexzenters 31, 32, 33, sowie das Klemmstücks 34, den Exzenterhalter 30, den Pneumatikzylinder 38 als Aktor sowie die Lagerplatten 28 und 48. Auch die von diesem weiteren zweiten Anstellmechanismus hervorgerufenen und übertragenen Bewegungen bedürfen der Schienen 7 und 10, um die Farbwerksböcke 3 und 6 bewegen zu können.

In FIG. 4 , which the components described below in a perspective AA according to FIG. 3 shows, it is shown that at this articulation 36 of the piston 37th the pneumatic cylinder 38 is articulated (this is not shown in the other figures). By a stroke movement of the piston (sketched by the double arrow 16), the eccentric spindle 31, which forms a double eccentric together with the eccentric discs 32 and 33, about their main axis of symmetry 15 is rotated. The pneumatic cylinder 38 is in turn attached to the plate 23 with the holder 14 of the pneumatic cylinder.
As already mentioned, the bearing plate 48 is fixed to the frame when the clamp 42 clamps the tube 44. The rotation of the eccentric spindle 31 with the eccentric disc 33 (the eccentric discs are eccentric to the axis of rotation 15 of the Doppelexzenters, which coincides with the main axis of symmetry of the circular cylindrical eccentric spindle 31), the 33 operates in the bearing plate 48, thus leading to a displacement of the eccentric 30 relative to the frame-fixed parts of the printing press 9. The eccentric holder 30 is fixedly connected to the format cylinder block 6 and moves it in this way. Already by this first relative movement of the anilox block 3, which sits on the format cylinder block 6, moved so that it changes its position relative to the frame-fixed parts, such as the console 8 and the impression cylinder 5.
Upon rotation of the eccentric spindle 31, of course, the eccentric disk 32 is rotated on the anilox roller side of this Anstellmechanismus. This rotation causes a further second movement first of these bearing plate 28 to the aforementioned parts, which move with the format cylinder 6. The clamp 22 is fixedly connected to the bearing plate 28. When the clamp is closed, it thus mediates, inter alia, the tube 24, the spindle 27, the bearing block and the anilox block 3, this further movement, which causes a change in the relative position of these parts to the format cylinder block 6. Thus, the components fixedly connected to the anilox block 3 make two relative movements to the frame-fixed components, which add up. In the embodiment shown, these movements take place in a plane, which is due to the orientation of the slides 7 and 10.
In connection with the present invention, it is advantageous to choose the angular position of the eccentric discs 32 and 33 so that the movements (in the same direction of rotation) are rectified. It is with it possible, by a rotation of the eccentric spindle 31 to move the format cylinder 4 from the impression cylinder 5 and to space the anilox roller 2 of the format cylinder 4. The two relative movements can occur simultaneously and cause the same distances. In a simultaneity of the movements, both movements take place while the double eccentric 31, 32, 33 is rotated by the same angular range. It is also conceivable to carry out the movements successively and to provide in each case an angular range for the movement of a trestle 3, 6.
The use of a stop 39 for limiting the rotational movement of the eccentric spindle 31 is advantageous. In particular, the movement in the setting position (pressure-on) can be limited. The stopper can be attached to the eccentric holder 30.
Mention is still the plate 23 which is fixedly connected to the eccentric holder 30. It is not firmly connected to the parts which are fixed to the frame or move (as described above) with the anilox block 3. Therefore, it does not hinder 23 the relative movement of these parts relative to the format cylinder 6. On the plate 23 is attached to the holder 14 of the pneumatic cylinder 38 ( FIG. 4 ).
In summary, therefore, it can be said that the further second setting mechanism of this exemplary embodiment, which can bring about a rapid setting in and out of the preset printing position, comprises in particular the following components:

• The parts of the double eccentric 31, 32, 33, as well as the clamping piece 34, the eccentric holder 30, the pneumatic cylinder 38 as an actuator and the bearing plates 28 and 48. Also caused by this other second adjusting mechanism and transmitted movements require the rails 7 and 10 to to move the inking blocks 3 and 6 can.

As mentioned, the further second adjusting mechanism of this embodiment can advantageously move two cylinder blocks 3, 6 in the manner described.

The entire positioning system 13 of one side of the inking unit 9 shown comprises the aforementioned adjusting mechanisms.

In the embodiment shown, the transmitted from the circular cylindrical eccentric spindle 31 on the eccentric discs 32 and 33 torque is converted into the force necessary for employment, since the eccentric discs are arranged and shaped in a manner known to those skilled eccentric to the axis of rotation 15 of the double eccentric. During rotation, the eccentric discs 32, 33 therefore operate in recesses of the bearing plates 28 and 48, which causes the displacement of the bearing plates 28 and 48 and the components firmly connected to them. LIST OF REFERENCE NUMBERS 1 Color receiving cylinder 2 anilox roller 3 Anilox roll Bock 4 format cylinder 5 Impression cylinder 6 Format cylinder Bock 7 Rail of the format cylinder gantry 8th console 9 Inking unit / printing machine 10 Rail of anilox roller block 11 12 13 adjustment system 14 Holder of the pneumatic cylinder (on the plate 23) 15 Rotary axis 15 of the double eccentric / main axis of symmetry of the circular cylindrical eccentric spindle 31 16 Double arrow (stroke movement of the piston 37) 17 18 19 20 Lever of the clamp for the anilox roller block 21 Handwheel for anilox fine adjustment mechanism 22 Clamp for the anilox roller block 23 plate 24 Tube for spindle 25 Bearing block of anilox roller fine adjustment mechanism 26 Thread of anilox fine adjustment mechanism 27 Spindle of anilox roller fine adjustment mechanism 28 Bearing plate for the eccentric disc 32nd 29 30 Exzenterhalter 31 (circular cylindrical) eccentric spindle 32 Eccentric disc detent side 33 Eccentric disc format cylinder side 34 Clamp eccentric 35 Lever of the clamping piece 36 Linkage on the lever of the clamping piece 37 Piston of the pneumatic cylinder 38 pneumatic cylinder 39 attack 40 Lever of the clamp for the format cylinder block 41 Handwheel for format cylinder fine adjustment mechanism 42 Clamp for the format cylinder block 43 44 Tube for spindle 45 Bearing block of format cylinder fine adjustment mechanism 46 Thread of the format cylinder fine adjustment mechanism 47 Spindle of format cylinder fine adjustment mechanism 48 Bearing plate for the eccentric disc 33

Claims (14)

1. Printing press (9) having at least one inking unit, in which at least one inking unit cylinder (2, 4, 5) can be set against another inking unit cylinder (2, 4, 5),

   - which inking unit contains at least one throwing-on system (13),

   - by way of which at least one inking unit frame (3, 6) can be moved in the course of the throwing-on movement of the inking unit cylinder (2, 4, 5),

   - the throwing-on system (13) comprising at least one first throwing-on mechanism, by way of which the position of the at least one inking unit frame (3, 6) can be set in a variable marner,

   - the throwing-on system (13) having at least a further second throwing-on mechanism, by way of which the at least one inking unit frame (3, 6) can be moved out of the position which is set by way of the at least one first throwing-on mechanism and can be moved back into the said position,

   - the second throwing-on mechanism having at least one eccentric (31, 32, 33),

   - and the at least one inking unit (9) containing at least two inking unit cylinders (2, 4, 5) which can be set against another inking unit cylinder (2, 4, 5), characterized

   - in that the second throwing-on mechanism contains at least one multiple eccentric (31, 32, 33).
2. Printing press according to the preceding claim, characterized in that the at least one multiple eccentric: (31, 32, 33) is attached on the at least one inking unit frame (3, 6).
3. Printing press according to the preceding claim, characterized in that the printing unit (9) contains a second cylinder (4) which can be set against the first cylinder (5), and contains a third cylinder (2) which can be set against the second cylinder (4).
4. Printing press according to the preceding claim, characterized in that the at least one eccentric or multiple eccentric (31, 32, 33) is attached on the inking unit frame (3, 6) which is assigned to the second cylinder (4).
5. Printing press according to one of the preceding claims, characterized in that at least two inking unit frames (3, 6) can be moved by way of the movement of the at least one eccentric (31, 32, 33).
6. Printing press according to one of the preceding claims, characterized in that at least two inking unit frames (3, 6) can be moved at the same time by way of the movement of the at least one eccentric (31, 32, 33).
7. Printing press according to one of the preceding claims, characterized in that at least two inking unit frames (3, 6) can be moved largely in one plane by way of the movement of the at least one eccentric (31, 32, 33).
8. Printing press according to one of the preceding claims, characterized in that the at least one eccentric or multiple eccentric (32, 32, 33) can be driven with the aid of a cylinder (38).
9. Printing press according to the preceding claim, characterized in that the cylinder can be actuated hydraulically or pneumatically.
10. Printing press according to one of the preceding claims, characterized in that

    - the throwing-on system (13) comprises at least one first throwing-on mechanism, by way of which the position of the at least one inking unit frame can be set in a variable manner,

    - and in that holding elements (22, 42, 26, 46) of the said throwing-on mechanism can also be moved in the course of the throwing-on movement which is brought about by way of the second throwing-on mechanism.
11. Printing press according to one of the preceding claims, characterized in that

    - the throwing-on system (13) comprises at least two first throwing-on mechanisms, by way of which the position of the at least one inking unit frame (3, 6) can be set in a variable manner,

    - and in that holding elements (22, 42, 26, 46) of at least two of the said throwing-on mechanisms can also be moved in the course of the throwing-on movement which is brought about by way of the second throwing-on mechanism.
12. Printing press according to one of the preceding claims, characterized by at least two throwing-on systems (13), by which in each case at least one inking unit frame can be moved which mounts the end-side bearings of inking unit cylinders.
13. Method for setting at least one inking unit cylinder (2, 4, 5) against another inking unit cylinder (2, 4, 5),

    - in which method at least one inking unit frame (3, 6) is moved in the course of the throwing-on movement of the inking unit cylinder (2, 4, 5),

    - at least one first throwing-on mechanism being used, in order to set the position of the at least one inking unit frame (3, 6) in a variable manner,

    - a further second throwing-on mechanism being used, in order to move the at least one inking unit frame (3, 6) out of the position which is set by way of the at least one first throwing-on mechanism and/or back into the said position, and the at least one inking unit (9) containing at least two inking unit cylinders (2, 4, 5) which are set against another inking unit cylinder (2, 4, 5),

    characterized in that
    the movements of the inking unit frame which are brought about by the second throwing-on mechanism are caused with the cooperation of a multiple eccentric (31, 32, 33).
14. Method according to the preceding claim, characterized in that at least two inking unit cylinders (2, 4) are moved by way of a rotation of the eccentric or multiple eccentric (31, 32, 33) about the eccentric axis.

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