CN1911655B - Sheet printing machine and process for sheet printing - Google Patents

Abstract

The sheet printing machine (1) has a first Anilox offset print units (11), a second Anilox offset print units (12), a third Anilox offset print units (13), and an offset print unit (15) and provided by a roller-type inking unit (29). The sheet printing machine (1) also includes a fourth Anilox offset print unit (14) assigned to the three Anilox offset print units (11, 12, 13) and that the offset print unit (15) provides a special color (S1) with the roller-type inking unit.

Description

Sheet-fed printing press and sheet-fed printing method

technical field

The present invention relates to a sheet-fed printing machine, which comprises a first anilox roller offset printing device, a second anilox roller offset printing device, a third anilox roller offset printing device and a Offset printing units for roller inking units. Furthermore, the invention relates to a sheet-fed printing method which can be carried out by means of such a sheet-fed printing press.

Background technique

Such a sheet-fed printing press is described in EP 0 870 609 A2. The advantage of this prior art sheet-fed printing press is supposed to be the elimination of the inking zone adjustment mentioned in this document. A disadvantage of this sheet-fed printing press is that its use is limited.

Contents of the invention

It is therefore the object of the present invention to provide a sheet-fed printing press with increased usability and to specify a sheet-fed printing method which can be carried out by means of this sheet-fed printing press.

The sheet-fed printing press according to the invention comprises a first anilox offset printing unit, a second anilox offset printing unit, a third anilox offset printing unit and an offset printing unit with roller inking unit device, wherein the anilox offset printing units are assigned a fourth anilox offset printing unit; the offset printing unit with roller inking unit delivers special inks.

Advantageous further developments of the invention result from the technical solutions described below.

In a further configuration, these anilox offset printing units deliver four-color printing black (Black) printing ink, cyan printing ink, magenta printing ink and yellow (Yellow) printing ink, the special ink is different from these four Printing ink for color printing. The special ink can be, for example, a so-called custom ink. In this further development, the anilox offset printing units can be arranged corresponding to the ink sequence, whereby the first anilox offset printing unit delivers black printing ink for four-color printing, the second anilox offset printing The device delivers four-color printing cyan printing ink and is arranged behind the first anilox offset printing device, and the third anilox offset printing device delivers four-color printing magenta printing ink and is arranged behind the second anilox offset printing device Behind the roller offset printing unit, the fourth anilox roller offset printing unit delivers yellow printing ink for four-color printing and is arranged behind the third anilox roller offset printing unit. The expression "arranged behind" as used above refers to the direction of sheet travel of the printing press. Preferably, the anilox offset printing units are arranged directly next to each other. In this case, offset printing units equipped with roller inking units delivering special inks are arranged in front of or preferably behind these anilox offset printing units, viewed in the direction of sheet travel. The four anilox offset printing units are used to print the same sheet surface, thereby producing a four-color print on the sheet surface. The offset printing unit comprising a roller inking unit can be used to also print the sheet side with the special ink. The printing press may include one or more other anilox offset printing units for printing the front side of the sheet or the reverse side of the sheet. For example, the printing press can be configured as a perfecting printing press and it can also comprise, in addition to the four anilox offset printing units which are already present according to the invention here for printing on the front side, a further four which are provided for printing on the reverse side Anilox offset printing device.

In a further refinement, the anilox offset printing units each comprise a printing form cylinder and an anilox roller having the same diameter as the printing form cylinder. Thus, the outer diameter of the anilox roller is substantially as large as the outer diameter of the plate cylinder.

In a further refinement, the anilox offset printing units each include an ink supply that differs from the chamber doctor blade and that has a single doctor blade. The ink supply device can be configured as an ink supply tank in which the printing ink to be supplied to the corresponding anilox roller is stored.

In another refinement, each of the anilox offset printing units includes a further impression cylinder. Therefore, there is no so-called common impression cylinder, against which several blanket cylinders are pressed together.

In another refinement, the roller inking unit is a roller inking unit other than an anilox inking unit. In this case, the roller inking unit is preferably configured as an inking roller inking unit and/or the roller inking unit comprises an ink metering device with adjustable inking zones.

In a further refinement, the printing press comprises a further offset printing unit with a further roller inking unit which delivers a special ink different from the special ink, the different The special inks described above are also printing inks other than printing inks for four-color printing. The two special inks can be, for example, different customer-required inks.

In the sheet-fed printing method according to the invention, black printing ink, cyan printing ink, magenta printing ink and yellow printing ink of four-color printing are printed in a sheet-fed printing press by means of some anilox offset printing units, At least one printing ink different from said four-color printing, black printing ink, magenta printing ink and yellow printing ink, is then printed by means of at least one offset printing unit of the sheet-fed printing press comprising an inking unit. Specialty inks for inks.

Description of drawings

Further developments of the machine and method can also be taken from the following description of preferred exemplary embodiments and the drawings. The accompanying drawings indicate:

Figure 1 Sheet-fed printing press with anilox offset printing unit and other offset printing units;

Fig. 2 Configuration of anilox roller offset printing device;

Fig. 3 configurations of other offset printing units respectively including ink metering units;

Figure 4 Configuration of the ink metering device.

Detailed ways

FIG. 1 shows a sheet-fed printing press 1 in a tandem configuration. The sheet-fed printing machine 1 includes a sheet-fed feeder 2 , a sheet-fed reel 3 , and first, second, third, and fourth anilox offset printing devices 11 , 12 , 13 , and 14 . In addition, the sheet-fed printing press comprises additional offset printing units 15 , 16 which are arranged downstream of the four anilox offset printing units 11 to 14 in the direction of sheet travel 17 . Each of the anilox offset printing units 11 to 14 and the additional offset printing units 15 , 16 includes a respective impression cylinder 18 . The black (Black) printing ink B of the four-color printing that is used for printing is stored in the first anilox roller offset printing device 11, the cyan printing ink C of four-color printing is stored in the second anilox roller offset printing device 12, the third Magenta printing ink M for four-color printing is stored in the anilox offset printing device 13 , and yellow (Yellow) printing ink Y for four-color printing is stored in the fourth anilox offset printing device 14 . One of the additional offset printing units 15 , 16 is filled with a first special ink S1 , while the other offset printing unit 16 is filled with a second special ink S2 . The anilox offset printing units 11 - 14 and the additional offset printing units 15 , 16 are arranged corresponding to the ink sequence B-C-M-Y-S1-S2 as viewed in the sheet travel direction 17 . Special inks S1 and S2 are printing inks different from printing inks B, C, M and Y of four-color printing, and they are also different from each other. The anilox offset printing devices 11 to 14 are preferably completely identical in structure to each other. However, if necessary, the first anilox offset printing device 11 can also be configured as a so-called continuous sheet printing device. paper device. Such a feeding device is, for example, a feeding cylinder or a front gripper. In any case, the four anilox offset printing units 11 to 14 are structurally identical to one another with regard to their printing unit cylinders and inking units. The additional offset printing units 15 , 16 for delivering the special inks S1 , S2 are constructed identically to one another.

FIG. 2 shows the structural configuration of the anilox offset printing units 11 to 14 by taking the first anilox offset printing unit 11 as an example. The first anilox offset printing unit 11 comprises, in addition to the impression cylinder 18 , a blanket cylinder 19 , a plate cylinder 20 and an anilox inking unit 21 for inking the plate cylinder 20 . Optionally, the anilox inking unit 21 can be equipped with a dampening device for dampening the printing plate cylinder 20 . The anilox inking unit 21 comprises a single inking roller 22 and an anilox roller 23 . During printing operation, the inking roller 22 rests not only on the anilox roller 23 but also on the printing form cylinder 20 . The outer diameter D of the anilox roller 23 is as large as the outer diameter D of the ink form roller 22 and the outer diameter D of the printing plate cylinder 20 . Resting against the anilox roller 23 is an ink supply 24 which, in the case of the first anilox offset printing unit 11 , stores black printing ink B for four-color printing. It goes without saying that cyan printing ink C, magenta printing ink M, and yellow printing ink Y of other four-color printing are stored in corresponding ink supply devices of the other anilox offset printing devices 12 to 14 . The ink supply device 24 includes an upwardly open ink container 25 and a doctor blade 26 arranged on the substantially groove-shaped ink container 25 . During printing operation, the ink level 27 in the ink container 25 is located above the blade 28 of the doctor blade 26 with which it rests against the anilox roller 23 . The doctor blade 26 is a single doctor blade of the ink supply device 24 and is oriented opposite to the direction of rotation of the anilox roller 23 indicated by the arrow symbol in the figure, that is to say, the doctor blade 26 is the so-called Reverse squeegee. In contrast to the chambered doctor blades, apart from the doctor blade 26 , no further doctor blades rest against the anilox roller 23 , ie there are neither further counter doctor blades nor forward doctor blades.

FIG. 3 shows the structural configuration of two additional offset printing units 15 , 16 using the example of an offset printing unit 15 for printing special ink S1. The offset printing unit 15 comprises, in addition to the impression cylinder 18 , a blanket cylinder 19 and a plate cylinder 20 . Since the three cylinders 18, 19, 20 of the offset printing unit 15 are constructed identically to the corresponding three cylinders 18, 19, 20 of the offset printing unit 11, these cylinders are marked in FIG. 3 with the reference numerals quoted from FIG. 2 . Furthermore, the offset printing unit 15 also includes a roller inking unit 29 and may include a dampening unit assigned to the roller inking unit 29 .

The roller inking device 29 is not an anilox roller inking device, but an inking roller inking device. The roller inking unit 29 comprises an ink fountain 30 with an ink fountain roller 31 and an ink metering device 32 . The ink fountain 30 is filled with a first special ink S1 , it being apparent that the corresponding ink fountain of the further offset printing unit 16 is filled with a second special ink S2 . In addition, the roller inking unit 29 also includes a plurality of inking rollers 33, inking rollers 34, inking rollers 35 and other inking rollers not shown in the figure that roll on the plate cylinder 20 during printing. The cross-ink roller between the ink roller 35 and the ink form roller 33, the transfer roller below it and the rubbing roller that move axially in series. The ink transfer roller 34 performs an oscillating movement indicated by the arrow symbol in FIG. The roller transfers the printing ink, here the special ink S1.

FIG. 4 shows the ink fountain roller 31 and the ink metering device 32 in a view corresponding to the viewing direction IV in FIG. 3 . The ink metering device 32 comprises metering elements 36 which are adjustable relative to one another in order to produce a strip-shaped ink profile 37 . The ink metering device 32 is divided into ink zones 38 arranged side by side along the printing width by means of metering elements 36 arranged in rows, wherein the metering elements 36 determine the corresponding ink distribution pattern 37 from ink zone 38 to ink zone 38 on the ink fountain roller 31 Varying ink layer thickness. A metering element 36 is arranged in each of these ink zones 38 . The metering element 36 can be a metering cylinder, a metering eccentric, a metering slide valve or an ink zone screw.

The aforementioned printing-inked special ink S1 can differ considerably in its eg rheological properties from the subsequent printing-inked special ink S2 which is filled in during an ink change, especially when it comes to inks requested by customers.

If the special ink S1 is to be printed in an anilox offset printing unit, the "adjustment range" of the anilox offset printing unit is controlled by a change in the mesh fill volume of the anilox roller (anilox roller change) and/or by a difference in roller temperature ( If the variation of the difference between the anilox roller temperature and the inking roller temperature) is determined and therefore very limited, the inking unit can only be adapted to an insufficient degree to widely varying customer requirements or special inks S1.

The advantage of the offset printing unit 15 with the roller inking unit 29 and the ink metering unit 32 of the roller inking unit is supposed to be the large adjustment range of the offset printing unit which allows Optional processing of printing inks whose properties differ greatly from one another.

The sheet-fed printing press 1 shown in FIGS. 1 to 4 is used for printing substrate sheets 39 (see FIGS. 2 and 3 ), each of which is first screened on its sheet front side. Black printing ink B, cyan printing ink C, magenta printing ink M and yellow printing ink Y are printed in four-color printing in roll offset printing units 11 to 14, and then in additional offset printing units 15, 16 as described The ink sequence is printed with special inks S1, S2.

list of reference signs

1 Sheet-fed printing machine 22 Inking roller

2 sheet feeder 23 anilox roller

3 Sheet-fed take-up unit 24 Ink supply device

11 The first anilox roller offset printing device 25 Ink container

12 Second anilox roller offset printing device 26 Squeegee

13 The third anilox roll offset printing device 27 Ink level

14 The fourth anilox roller offset printing device 28 Blade

15 Offset printing device 29 Roller inking device

16 offset printing device 30 ink fountain

17 sheet traveling direction 31 ink fountain roller

18 Impression cylinder 32 Ink metering device

19 Blanket cylinder 33 Inking roller

20 plate cylinder 34 ink transfer roller

21 Anilox roller inking device 35 String ink roller

36 Metering components C Cyan printing ink for four-color printing

37 Ink distribution diagram M Magenta printing ink for four-color printing

38 Ink zone Y Yellow printing ink for four-color printing

39 sheets of substrates S1 first special ink

S2 Second special ink

B Black printing ink for four-color printing D Outer diameter

Claims (9)

1. A sheet-fed printing machine (1), comprising a first anilox offset printing unit (11), a second anilox offset printing unit (12), a third anilox offset printing unit (13) and an offset printing unit (15) with a roller inking unit (29), wherein: the anilox offset printing units (11, 12, 13) are equipped with a fourth anilox offset printing unit (14); The offset printing unit (15) with a roller inking unit (29) delivers special inks (S1); the roller inking unit (29) is a roller inking unit different from an anilox inking unit; and The roller inking unit (29) includes an ink metering device (32) with an adjustable ink zone (38). 2. The sheet-fed printing machine according to claim 1, characterized in that: these anilox roller offset printing devices and the fourth anilox roller offset printing device convey the black printing ink (B) and cyan printing ink of four-color printing (C), magenta printing ink (M) and yellow printing ink (Y); the special ink (S1) is a printing ink different from these four-color printing printing inks (B, C, M, Y). 3. The sheet-fed printing machine according to claim 2, characterized in that: the first anilox roller offset printing device (11) transports black printing ink (B) for four-color printing; the second anilox roller offset printing The printing device (12) conveys the cyan printing ink (C) of four-color printing and is arranged behind the first anilox roller offset printing device (11); the third anilox roller offset printing device (13) conveys four-color printing Magenta printing ink (M) and arranged behind the second anilox offset printing unit (12); the fourth anilox offset printing unit (14) delivers yellow printing ink (Y) for four-color printing and Arranged behind the third anilox offset printing unit (13). 4. The sheet-fed printing press according to claim 1 , characterized in that the anilox offset printing units and the fourth anilox offset printing unit each comprise a printing plate cylinder (20) and An anilox roller (23) having the same diameter as the plate cylinder (20). 5. Sheet-fed printing press according to one of claims 1 to 3, characterized in that the anilox offset printing unit and the fourth anilox offset printing unit each comprise a different cavity doctor blade The ink supply device (24) of this ink supply device (24) has a unique doctor blade (26). 6. Sheet-fed printing press according to one of claims 1 to 3, characterized in that each of the anilox offset printing units and the fourth anilox offset printing unit comprises another impression Roller (18). 7. The sheet-fed printing machine according to claim 1, characterized in that the roller inking device (29) is an inking roller inking device. 8. The sheet-fed printing press according to one of claims 1 to 3, characterized in that another offset printing unit (16) with another roller inking unit is provided and the other offset printing unit A special ink (S2) different from the special ink (S1) is delivered. 9. A sheet-fed printing method, wherein, in a sheet-fed printing press constructed according to one of claims 1 to 8, four colors are printed by means of anilox offset printing devices (11, 12, 13, 14) Printed black printing ink (B), cyan printing ink (C), magenta printing ink (M) and yellow printing ink (Y), then by means of at least one of the sheet-fed printing machines (1) comprising ink transfer rollers The offset printing unit (15) of the inking unit (29) prints at least one black printing ink (B), cyan printing ink (C), magenta printing ink (M) and yellow printing ink different from the four-color printing (Y) for specialty inks (S1).

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