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EP1880845B1 - Sheet-fed offset printing press - Google Patents

Sheet-fed offset printing press Download PDF

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Publication number
EP1880845B1
EP1880845B1 EP07110749A EP07110749A EP1880845B1 EP 1880845 B1 EP1880845 B1 EP 1880845B1 EP 07110749 A EP07110749 A EP 07110749A EP 07110749 A EP07110749 A EP 07110749A EP 1880845 B1 EP1880845 B1 EP 1880845B1
Authority
EP
European Patent Office
Prior art keywords
sheets
printing
sheet
units
sides
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07110749A
Other languages
German (de)
French (fr)
Other versions
EP1880845A3 (en
EP1880845A2 (en
Inventor
Michael Gieser
Norbert Rodi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1880845A2 publication Critical patent/EP1880845A2/en
Publication of EP1880845A3 publication Critical patent/EP1880845A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/0443—Drying sheets, e.g. between two printing stations after printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets

Definitions

  • the invention relates to a sheet-fed offset printing machine for two-sided multi-color printing preferably on paper sheets, with a first row directly successively arranged printing units for printing the first page of the sheet, a subsequent turning device, then a second series of successively arranged printing units for printing the other sheet side and one or more subsequent coating plants.
  • Such sheet-fed presses in a row construction with one or more arranged at the end of the machine coating units for painting the last printed sheet side are known and are offered by several manufacturers.
  • Turning devices are, as for example in the DE 199 33 304 mentions, usually convertible, so that beautiful and Wiedertik compassion can be realized, and may also be inserted alternatively at different locations between the printing units, for example, in the reprint different variants such. For example, four over four, two over six, etc. colors on the front and back of the sheet to print.
  • separate painting machines are known in which finished printed sheets are painted on both sides. Such painting machines can, like the EP 1 117 487 shows, also have a turning device.
  • a disadvantage of separate painting machines is the fact that once a stack is formed, which must then be created again afterwards. At the time, the sheets coming from the delivery pile of the press are already powdered, which reduces gloss during subsequent painting and can otherwise lead to problems.
  • the mechanical engineering effort is higher because it requires two feeders and two outriggers compared to an inline solution.
  • FIG. 1a shows an offset printing machine 1 in a row construction with a feeder 2, in which the unprinted paper stack 3 is located, as well as four printing units 7a-d for the four primary colors, which form the straight printing part of the machine 1.
  • a turning device 4 which operates on the principle of three-drum turn. It consists of a feed drum 4a, a storage drum 4b and a turning drum 4c.
  • the drum 4c is mounted in the side walls 18a of the first printing unit 8a following the turning device 4.
  • At the counter-pressure cylinder 108 a of the turned arc is passed.
  • the second part of the machine is in the FIG. 1b shown.
  • the four perfecting units 8a-d are followed by a coating unit 9a of the type "chambered doctor blade", ie. it has a screen roller 19a and a chamber doctor blade 20a, in which aqueous dispersion varnish is located.
  • 22a designates a so-called "anilox roll star” which contains three further anilox rolls with different cup sizes, against which the anilox roller 19a can be exchanged in order to determine the amount of lacquer to be applied on the way.
  • the coating unit 9a the reverse side of the sheet is coated over its entire surface with an aqueous dispersion varnish.
  • the coating unit 9a is followed by a drying tower 10a.
  • this drying tower the sheet transported through is dried in the area of the cylinder 110 on the counterpressure side by hot air and infrared radiation.
  • a second turning device 14 is arranged, which is substantially identical in construction to the first turning device 4. Also, it has three drums 14a, b and c, wherein the turning drum 14c is stored in this case in the side walls of the adjoining the turning device 14 second coating unit 9b and passes the sheet to the impression cylinder 109b of the coating unit 9b.
  • the coating unit 9b is of the same type as the coating unit 9a and serves to cover the straight printing side of the sheet also with an aqueous dispersion coating over the entire surface.
  • On the coating unit 9b follows the boom 5 of the printing press. In it grabber bridges run by means of a chain guide 15. These gripper bars 16 take over the sheets painted in the factory 9b and guide them under dryer inserts 11a, b, c and d, where the recto-printing side of the sheet is likewise dried with infrared radiation and hot air and the dispersion coating is solidified. The thus coated on both sides sheet is then stored in the boom 5 on the sheet pile 6.
  • the printed sheet does not come into contact with paint.
  • the surfaces of the sheet-guiding impression cylinders 108a-d in the printing units 8a-d and the guide plates of the transferters arranged therebetween can therefore be coated with color-repellent layers which are matched or optimized to the properties of the oil-based offset inks.
  • the sticky dispersion paint which causes soiling effects, is introduced only at the end of the machine when the process of printing with offset printing inks is completed. In this way, the service life of the cylinder lifts and the cleaning intervals compared to configurations in which the coating unit is located in front of the first turning device 4, significantly increase.
  • the turning device 4 is convertible, ie it can be such. B. in the DE 41 31 273 described, change from perfecting to perfecting operation. The same applies to the turning device 14.
  • This variability makes it possible to print with the printing press 1 a whole set of other job variants: If both turning devices 4 and 14 converted to recto printing, then for example, with the printing units 8 of the perfecting module on the recto printing side in addition a number to print of special colors.
  • a transparent oil-based matt varnish can additionally be applied to specific areas in the printed image, which is then subsequently coated in two layers one above the other in the varnishing units 9a and 9b with a high-gloss dispersion varnish. In this way, very high-quality single-sided cardboard boxes, z. For packaging.
  • the convertible turning plant 14 between the two coating units 9a and 9b also offers the possibility, after conversion of the turning device 14 to straight-ahead operation in the first coating unit 9a, to apply a dispersion coating as a primer or adhesion promoter in order to cover or "close off” the underlying offset colors. so that the high-gloss UV paints then printed in the second coating unit 9b do not come into direct contact with the offset inks and can react with them.
  • the counterpressure part of the basis of FIG. 1a and 1b modified above-described printing machine.
  • the drying tower 10a off FIG. 1b omitted, ie the coming of the coating unit 9a bow is turned moist in the turning device 14.
  • the sheet coated on both sides in the chain jib 5 passes through four dryer modules 21a-h, in which the sheet is dried on both sides, ie from above and from below, with the aid of infrared radiation and hot air becomes.
  • integrated dryer 21e-h can be used in the bowing of the boom, as in the DE 10 2005 042 956 A1 are described.
  • the first coating unit 9a is of the screen roller type and carries an effect varnish on the reverse side to be varnished. This is dried in the subsequent drying tower 10a. This is followed by a coating unit 29a for z. B. UV coatings, in which the reverse side of the sheet is covered with a high-gloss transparent protective coating surface.
  • the turning device 14 is followed again by the same configuration of a coating unit 9b for effect paint, a drying tower 10b and a coating unit 29b, which applies the high-gloss protective coating on the recto printing side.
  • the dryer trays in the boom 25 are dispensable.
  • either the front or back can be provided with four different paint layers one above the other.
  • the last printing unit 8d of the counterpressure part is followed by a first coater roll 39a of the scoop type. Its application roller 49a bears on the reverse side of the sheet over its entire surface an aqueous dispersion coating.
  • the impression cylinder 59a of the coating unit 39a is followed by a transport drum 124a, which simultaneously acts as a feed drum of the turning device 24.
  • an infrared dryer 125a is installed, which acts on the drum 124a resting on the sheet or its concave inside with infrared radiation and hot air.
  • the drum 124a is constructed in the manner of a skeleton so that the radiation and any air used for drying may reach the surface of the sheet.
  • the drum 124a is then followed by the storage drum 24b and the turning drum 24c of the turning device 24, followed by a second coating unit 39b of the suction roller type.
  • a second coating unit 39b of the suction roller type With its paint application cylinder 49b is now the recto printing side of the Bows painted.
  • the boom 5 joins, on the gripper bridges the sheets painted on both sides are passed.
  • the double-acting dryer modules 21 ah in the boom 5 the straight printing side is dried and expelled residual moisture in the paint layer of the reverse side of the sheet.
  • the machine according to this embodiment requires less footprint because, as a result of drying out of the interior of the cylinder 124a, the number of sheet-guiding cylinders can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Registering Or Overturning Sheets (AREA)

Description

Die Erfindung betrifft eine Bogenoffsetdruckmaschine für den beidseitigen Mehrfarbendruck vorzugsweise auf Papierbögen, mit einer ersten Reihe direkt hintereinander angeordneter Druckwerke für das Bedrucken der ersten Seite des Bogens, einer darauf folgenden Wendeeinrichtung, darauf folgend einer zweiten Reihe von hintereinander angeordneten Druckwerken für das Bedrucken der anderen Bogenseite sowie einem oder mehreren darauf folgenden Lackwerken. Derartige Bogendruckmaschinen in Reihenbauweise mit einem oder mehreren am Ende der Maschine angeordneten Lackwerken für das Lackieren der zuletzt bedruckten Bogenseite sind bekannt und werden von mehreren Herstellern angeboten.The invention relates to a sheet-fed offset printing machine for two-sided multi-color printing preferably on paper sheets, with a first row directly successively arranged printing units for printing the first page of the sheet, a subsequent turning device, then a second series of successively arranged printing units for printing the other sheet side and one or more subsequent coating plants. Such sheet-fed presses in a row construction with one or more arranged at the end of the machine coating units for painting the last printed sheet side are known and are offered by several manufacturers.

Es ist auch schon in der DE 42 13 024 A1 vorgeschlagen worden, bei Maschinen der eingangs genannten Art die bedruckten Bögen in einem Maschinendurchgang, d. h. inline, beidseitig zu lackieren. Dazu besitzt die Druckmaschine vor der Wendeineinrichtung ein Lackwerk und eine Trocknereinrichtung. Somit wird dort die Schöndruckseite des Bogens lackiert und getrocknet, bevor sie zum Zwecke des Widerdrucks gewendet wird.It's already in the DE 42 13 024 A1 has been proposed, in machines of the type mentioned, the printed sheets in a machine passage, ie inline to paint on both sides. For this purpose, the printing press has a coating unit and a drying device before the turning device. Thus, there is the recto-print side of the sheet painted and dried before it is turned for the purpose of perfecting.

Da die Schöndruckseite des Bogens hier schon lackiert wird, bevor der Bogen anschließend die Druckspalte der Widerdruckwerke durchläuft, nimmt der durch das Lackieren erzeugte Glanz der Bogenoberfläche wieder ab, und zwar je mehr, desto mehr Widerdruckwerke bzw. Druckspalte er durchläuft. Darüber hinaus treten Probleme insbesondere dann auf, wenn der auf die Schöndruckseite aufgetragene Lack durch die Trocknereinrichtung nicht vollständig getrocknet ist. Denn die für den Kontakt mit den ölbasierten Offsetdruckfarben optimierten Oberflächen der Gegendruckzylinder im Widerdruckwerk können durch Lackreste, damit verklebten Papierstaub etc., verschmutzen und müssten dann aufwändig gereinigt werden.Since the recto printing side of the sheet is already painted here, before the sheet then passes through the printing column of the perfecting, the gloss of the sheet surface produced by painting decreases again, and that more, the more printing units or printing column he goes through. In addition, problems occur in particular when the paint applied to the recto printing side is not completely dried by the drying device. Because optimized for the contact with the oil-based offset inks surfaces of the impression cylinders in the printing unit can be contaminated by paint residues, thus glued paper dust, etc., and would then be laboriously cleaned.

Wendeeinrichtungen sind, wie beispielsweise auch in der DE 199 33 304 erwähnt, meistens umstellbar, so dass Schön- und Wiederdruckbetrieb realisiert werden kann, und können auch alternativ an unterschiedlichen Stellen zwischen den Druckwerken eingefügt sein, um beispielsweise im Wiederdruck unterschiedliche Varianten wie z. B. vier über vier, zwei über sechs etc. Farben auf der Vorder- und Rückseite des Bogens zu drucken.Turning devices are, as for example in the DE 199 33 304 mentions, usually convertible, so that beautiful and Wiederdruckbetrieb can be realized, and may also be inserted alternatively at different locations between the printing units, for example, in the reprint different variants such. For example, four over four, two over six, etc. colors on the front and back of the sheet to print.

Es sind auch Druckmaschinen bekannt, beispielsweise aus der EP 0 976 555 , bei denen der Bogen abwechselnd nacheinander jeweils von einem oberhalb und unterhalb des Papiertransportpfads angeordneten Druckwerk mit Offsetdruckfarben bedruckt und anschließend beidseitig durch ein oberhalb und unterhalb des Papierpfads angeordnetes Lackwerk lackiert wird. Abgesehen davon, dass sich dieser Druckmaschinentyp wegen der schlechten Zugänglichkeit der unten liegenden Druckwerke nicht durchgesetzt hat, tritt hier folgendes Problem auf: Wenn die letzte Farbe der Widerdruckseite gedruckt wird, hat der Bogen bereits sämtliche Druckspalte durchlaufen. Gegenüber einer Maschine, bei der erst die Schöndruckseite und dann die Widerdruckseite komplett bedruckt wird, wird das Druckbild aufgrund der doppelten Anzahl der durchlaufenden Druckspalte stärker verbreitert ("breiter drucken"), wobei es nicht möglich ist, diesen Effekt durch eine Registerregelung zu kompensieren.There are also known printing presses, for example from the EP 0 976 555 in which the sheet is alternately successively printed in each case by a printing unit arranged above and below the paper transport path with offset printing inks and subsequently coated on both sides by a coating unit arranged above and below the paper path. Apart from the fact that this type of printing press has not prevailed because of the poor accessibility of the underlying printing units, the following problem occurs here: When the last color of the reverse side is printed, the sheet has already passed through all printing gaps. Compared to a machine in which only the straight printing side and then the reverse side is completely printed, the printed image is more widened due to the double number of continuous printing gaps ("wider print"), whereby it is not possible to compensate for this effect by a register control.

Daneben sind separate Lackiermaschinen bekannt, in denen fertig bedruckte Bögen beidseitig lackiert werden. Solche Lackiermaschinen können, wie die EP 1 117 487 zeigt, auch eine Wendeeinrichtung besitzen. Nachteilig bei separaten Lackiermaschinen ist jedoch der Umstand, dass erst einmal ein Stapel gebildet wird, der dann anschließend wieder angelegt werden muss. Zu dem Zeitpunkt sind die vom Auslagestapel der Druckmaschine kommenden Bögen bereits gepudert, was beim anschließenden Lackieren den Glanz herabsetzen und auch sonst zu Problemen führen kann. Darüber hinaus ist der maschinenbauliche Aufwand höher, denn es werden im Vergleich zu einer Inline-Lösung zwei Anleger und zwei Ausleger benötigt.In addition, separate painting machines are known in which finished printed sheets are painted on both sides. Such painting machines can, like the EP 1 117 487 shows, also have a turning device. A disadvantage of separate painting machines, however, is the fact that once a stack is formed, which must then be created again afterwards. At the time, the sheets coming from the delivery pile of the press are already powdered, which reduces gloss during subsequent painting and can otherwise lead to problems. In addition, the mechanical engineering effort is higher because it requires two feeders and two outriggers compared to an inline solution.

Es ist die Aufgabe der vorliegenden Erfindung, eine Bogenoffsetdruckmaschine der eingangs genannten Art zu schaffen, bei der in hoher Qualität inline bedruckte und doppelseitig lackierte Bögen erhalten werden.It is the object of the present invention to provide a sheet-fed offset printing machine of the type mentioned in the inline printed and double-sided coated sheets are obtained in high quality.

Diese Aufgabe wird durch eine Bogendruckmaschine mit den im Kennzeichen des Anspruchs 1 angegebenen Merkmalen gelöst bzw. durch ein Verfahren gemäß Anspruch 8. Gemäß der Erfindung werden also die Bögen erst beidseitig bedruckt bevor sie lackiert werden, wobei zwischen dem Lackieren von Vorder- und Rückseite eine weitere Wendung des Bogens erfolgt. Auf diese Weise erhält man eine Bogendruckmaschine, auf der die Inline-Fertigung von beidseitig lackierten Bögen möglich ist, und zwar ohne die eingangs geschilderten Probleme. Es lässt sich auf beiden Seiten des Bogens ein höherer Glanzgrad erzielen und Reinigungsvorgänge für die Zylinderoberflächen bzw. Zylinderaufzüge im Widerdruckwerk, die nun auf den Kontakt mit ölbasierter Farbe optimiert werden können, sind entbehrlich.This object is achieved by a sheet-fed press with the features specified in the characterizing part of claim 1 or by a method according to claim 8. According to the invention, therefore, the sheets are first printed on both sides before being painted, wherein between the painting of front and back another turn the bow is done. In this way, you get a sheet-fed press on which the inline production of double-coated sheets is possible, without the problems described above. It can be achieved on both sides of the sheet a higher gloss level and cleaning operations for the cylinder surfaces or cylinder lifts in the perfecting, which can now be optimized for contact with oil-based paint, are unnecessary.

Weitere Vorteile der Erfindung ergeben sich aus den nachfolgend anhand der Figuren 1 bis 3 der beigefügten Zeichnungen.

Figur 1a
ist eine schematische Darstellung des Schöndruckteils einer Bogenoffsetdruckmaschine in Reihenbauweise,
Figur 1b
ist eine schematische Darstellung des Widerdruckteils einer Bogenoffsetdruckmaschine in Reihenbauweise,
Figur 2
zeigt den Widerdruckteil der Druckmaschine nach Figur 1b gemäß einem zweiten Ausführungsbeispiel, und
Figur 3
zeigt den Widerdruckteil der Druckmaschine nach Figur 1b gemäß einem dritten Ausführungsbeispiel.
Figur 4
zeigt den auf das letzte Druckwerk des Widerdruckteils der Druckmaschine nach Figur 1b folgende Ende der Maschine gemäß einem vierten Ausführungsbeispiel.
Further advantages of the invention will become apparent from the following with reference to the FIGS. 1 to 3 of the accompanying drawings.
FIG. 1a
is a schematic representation of the straight printing part of a sheet-fed offset printing machine in a row construction,
FIG. 1b
is a schematic representation of the counter-pressure part of a sheet-fed offset printing machine in a row construction,
FIG. 2
shows the counterpressure part of the printing press FIG. 1b according to a second embodiment, and
FIG. 3
shows the counterpressure part of the printing press FIG. 1b according to a third embodiment.
FIG. 4
indicates the last printing unit of the counterpressure part of the printing press FIG. 1b following end of the machine according to a fourth embodiment.

Figur 1a zeigt eine Offsetdruckmaschine 1 in Reihenbauweise mit einem Anleger 2, in dem sich der unbedruckte Papierstapel 3 befindet, sowie vier Druckwerken 7a-d für die vier Grundfarben, die den Schöndruckteil der Maschine 1 bilden. Auf das vierte Druckwerk 7d folgt eine Wendeeinrichtung 4, die nach dem Prinzip der Drei-Trommel-Wendung arbeitet. Sie besteht aus einer Zuführtrommel 4a, einer Speichertrommel 4b und einer Wendetrommel 4c. Die Trommel 4c ist in den Seitenwänden 18a des auf die Wendeeinrichtung 4 folgenden ersten Widerdruckwerks 8a gelagert. An dessen Gegendruckzylinder 108a wird der gewendete Bogen übergeben. Der zweite Teil der Maschine ist in der Figur 1b dargestellt. Auf die vier Widerdruckwerke 8a-d folgt ein Lackwerk 9a vom Typ "Kammerrakel", d .h. es besitzt eine Rasternäpfchenwalze 19a und ein Kammerrakel 20a, in dem sich wässriger Dispersionslack befindet. Mit 22a ist ein so genannter "Rasterwalzenstern" bezeichnet, der drei weitere Rasterwalzen mit unterschiedlicher Näpfchengröße enthält, gegen die die Rasterwalze 19a ausgetauscht werden kann, um auf dem Weg die aufzutragende Lackmenge zu bestimmen. Im Lackwerk 9a wird die Widerdruckseite des Bogens vollflächig mit einem wässrigen Dispersionslack überzogen. FIG. 1a shows an offset printing machine 1 in a row construction with a feeder 2, in which the unprinted paper stack 3 is located, as well as four printing units 7a-d for the four primary colors, which form the straight printing part of the machine 1. On the fourth printing unit 7d followed by a turning device 4, which operates on the principle of three-drum turn. It consists of a feed drum 4a, a storage drum 4b and a turning drum 4c. The drum 4c is mounted in the side walls 18a of the first printing unit 8a following the turning device 4. At the counter-pressure cylinder 108 a of the turned arc is passed. The second part of the machine is in the FIG. 1b shown. The four perfecting units 8a-d are followed by a coating unit 9a of the type "chambered doctor blade", ie. it has a screen roller 19a and a chamber doctor blade 20a, in which aqueous dispersion varnish is located. 22a designates a so-called "anilox roll star" which contains three further anilox rolls with different cup sizes, against which the anilox roller 19a can be exchanged in order to determine the amount of lacquer to be applied on the way. In the coating unit 9a, the reverse side of the sheet is coated over its entire surface with an aqueous dispersion varnish.

Auf das Lackwerk 9a folgt ein Trockenturm 10a. In diesem Trockenturm wird der hindurchtransportierte Bogen im Bereich des Zylinders 110 auf der Widerdruckseite durch Heißluft und Infrarotstrahlung getrocknet.The coating unit 9a is followed by a drying tower 10a. In this drying tower, the sheet transported through is dried in the area of the cylinder 110 on the counterpressure side by hot air and infrared radiation.

In Bogenlaufrichtung hinter dem Trockenturm 10a ist eine zweite Wendeeinrichtung 14 angeordnet, die im Wesentlichen baugleich mit der ersten Wendeeinrichtung 4 ist. Auch sie besitzt drei Trommeln 14a, b und c, wobei die Wendetrommel 14c in diesem Falle in den Seitenwänden des sich an die Wendeeinrichtung 14 anschließenden zweiten Lackwerks 9b gelagert ist und den Bogen an den Gegendruckzylinder 109b des Lackwerks 9b übergibt. Das Lackwerk 9b ist vom gleichen Typ wie das Lackwerk 9a und dient dazu, die Schöndruckseite des Bogens ebenfalls mit einem wässrigen Dispersionslack vollflächig zu überziehen.In the sheet running direction behind the drying tower 10 a, a second turning device 14 is arranged, which is substantially identical in construction to the first turning device 4. Also, it has three drums 14a, b and c, wherein the turning drum 14c is stored in this case in the side walls of the adjoining the turning device 14 second coating unit 9b and passes the sheet to the impression cylinder 109b of the coating unit 9b. The coating unit 9b is of the same type as the coating unit 9a and serves to cover the straight printing side of the sheet also with an aqueous dispersion coating over the entire surface.

Auf das Lackwerk 9b folgt der Ausleger 5 der Druckmaschine. Darin laufen Greiferbrücken mittels einer Kettenführung 15 um. Diese Greiferbrücken 16 übernehmen die im Werk 9b lackierten Bogen und führen sie unter Trocknereinschüben 11a, b, c und d hindurch, wo die Schöndruckseite des Bogens ebenfalls mit Infrarotstrahlung und Heißluft getrocknet und dabei der Dispersionslack verfestigt wird. Der so beidseitig lackierte Bogen wird anschließend im Ausleger 5 auf dem Bogenstapel 6 abgelegt.On the coating unit 9b follows the boom 5 of the printing press. In it grabber bridges run by means of a chain guide 15. These gripper bars 16 take over the sheets painted in the factory 9b and guide them under dryer inserts 11a, b, c and d, where the recto-printing side of the sheet is likewise dried with infrared radiation and hot air and the dispersion coating is solidified. The thus coated on both sides sheet is then stored in the boom 5 on the sheet pile 6.

Während seines Transports durch die Druckwerke 7a-d und 8a-d kommt der bedruckte Bogen nicht mit Lack in Berührung. Die Oberflächen der bogenführenden Gegendruckzylinder 108a-d in den Druckwerken 8a-d und die Führungsbleche der dazwischen angeordneten Transferter können deshalb mit farbabweisenden Schichten belegt werden, die auf die Eigenschaften der ölbasierten Offsetfarben abgestimmt bzw. optimiert sind. Der klebrige und für Verschmutzungseffekte ursächliche Dispersionslack wird erst am Ende der Maschine eingebracht, wenn der Prozess des Druckens mit Offsetdruckfarben beendet ist. Auf diese Weise lassen sich die Standzeit der Zylinderaufzüge und die Reinigungsintervalle gegenüber Konfigurationen, bei denen sich das Lackwerk vor der ersten Wendeeinrichtung 4 befindet, wesentlich erhöhen.During its transport through the printing units 7a-d and 8a-d, the printed sheet does not come into contact with paint. The surfaces of the sheet-guiding impression cylinders 108a-d in the printing units 8a-d and the guide plates of the transferters arranged therebetween can therefore be coated with color-repellent layers which are matched or optimized to the properties of the oil-based offset inks. The sticky dispersion paint, which causes soiling effects, is introduced only at the end of the machine when the process of printing with offset printing inks is completed. In this way, the service life of the cylinder lifts and the cleaning intervals compared to configurations in which the coating unit is located in front of the first turning device 4, significantly increase.

Die Wendeeinrichtung 4 ist umstellbar, d. h. sie lässt sich wie z. B. in der DE 41 31 273 beschrieben, von Schön- auf Widerdruckbetrieb umstellen. Gleiches gilt für die Wendeeinrichtung 14. Diese Variabilität ermöglicht es, mit der Druckmaschine 1 eine ganze Reihe weiterer Auftragsvarianten zu drucken: Werden beide Wendeeinrichtungen 4 und 14 auf Schöndruckbetrieb umgestellt, dann lässt sich beispielsweise mit den Druckwerken 8 des Widerdruckmoduls auf der Schöndruckseite zusätzlich eine Reihe von Sonderfarben verdrucken. Im Druckwerk 8d kann zusätzlich ein transparenter ölbasierter Mattlack auf bestimmte Stellen im Druckbild aufgebracht werden, das dann anschließend in zwei Schichten übereinander in den Lackwerken 9a und 9b jeweils mit einem hochglänzenden Dispersionslack überzogen wird. Auf diese Weise lassen sich sehr hochwertige einseitig bedruckte Kartonagen, z. B. für Verpackungen, herstellen.The turning device 4 is convertible, ie it can be such. B. in the DE 41 31 273 described, change from perfecting to perfecting operation. The same applies to the turning device 14. This variability makes it possible to print with the printing press 1 a whole set of other job variants: If both turning devices 4 and 14 converted to recto printing, then for example, with the printing units 8 of the perfecting module on the recto printing side in addition a number to print of special colors. In the printing unit 8d, a transparent oil-based matt varnish can additionally be applied to specific areas in the printed image, which is then subsequently coated in two layers one above the other in the varnishing units 9a and 9b with a high-gloss dispersion varnish. In this way, very high-quality single-sided cardboard boxes, z. For packaging.

Insbesondere das umstellbare Wendewerk 14 zwischen den beiden Lackwerken 9a und 9b bietet auch die Möglichkeit, nach Umstellung der Wendeeinrichtung 14 auf Geradeausbetrieb im ersten Lackwerk 9a einen Dispersionslack als Primer- bzw. Haftvermittler aufzutragen, um die darunter liegenden Offsetfarben abzudecken bzw. "abzuschließen", damit die dann im zweiten Lackwerk 9b verdruckten hochglänzenden UV-Lacke nicht in direktem Kontakt mit den Offsetfarben kommen und mit ihnen reagieren können.In particular, the convertible turning plant 14 between the two coating units 9a and 9b also offers the possibility, after conversion of the turning device 14 to straight-ahead operation in the first coating unit 9a, to apply a dispersion coating as a primer or adhesion promoter in order to cover or "close off" the underlying offset colors. so that the high-gloss UV paints then printed in the second coating unit 9b do not come into direct contact with the offset inks and can react with them.

Eine andere Möglichkeit ist das Aufbringen von z. B. Goldlack im ersten Lackwerk 9a und das anschließende vollflächige Überziehen des Druckbogens mit einem Schutzlack im zweiten Lackwerk 9b.Another possibility is the application of z. B. gold paint in the first coating unit 9a and the subsequent full-surface coating of the sheet with a resist in the second coating unit 9b.

Weiterhin besteht die Möglichkeit, nach der Umstellung auf Geradeausbetrieb im ersten Lackwerk 9a einen Klarlack auf dem bedruckten Bogen aufzubringen und anschließend zu trocknen, bevor im zweiten Lackwerk 9b Metallic-Lacke aufgebracht werden, um zu verhindern, dass die auf den Bogen gedruckten Offsetfarben die Lackplatte im Lackwerk mit Farbe zusetzen.It is also possible to apply a clear coat on the printed sheet after conversion to straight mode in the first coating unit 9a and then to dry before 9b metallic paints are applied in the second coating unit to prevent the printed on the sheet offset inks the coating plate Add paint in the coating unit.

Bei dem in Figur 2 dargestellten Ausführungsbeispiel ist der Widerdruckteil der anhand von Figur 1a und 1b vorstehend beschriebenen Druckmaschine modifiziert. Hier ist jetzt der Trockenturm 10a aus Figur 1b weggefallen, d. h. der aus dem Lackwerk 9a kommende Bogen wird in der Wendeeinrichtung 14 feucht gewendet. Nach dem Durchlauf durch das zweite Lackwerk 9b, in dem die Schöndruckseite lackiert wird, durchläuft der beidseitig lackierte Bogen im Kettenausleger 5 vier Trocknermodule 21a-h, in denen der Bogen beidseitig, d. h. von oben und von unten, mit Hilfe von Infrarotstrahlung und Heißluft getrocknet wird. Hier können beispielsweise in die Bogenführung des Auslegers 5 integrierte Trockner 21e-h eingesetzt werden, wie sie in der DE 10 2005 042 956 A1 beschrieben sind.At the in FIG. 2 illustrated embodiment, the counterpressure part of the basis of FIG. 1a and 1b modified above-described printing machine. Here is the drying tower 10a off FIG. 1b omitted, ie the coming of the coating unit 9a bow is turned moist in the turning device 14. After passing through the second coating unit 9b, in which the recto printing side is painted, the sheet coated on both sides in the chain jib 5 passes through four dryer modules 21a-h, in which the sheet is dried on both sides, ie from above and from below, with the aid of infrared radiation and hot air becomes. Here, for example, integrated dryer 21e-h can be used in the bowing of the boom, as in the DE 10 2005 042 956 A1 are described.

In Folge des Wegfalls des separaten Trockenturms baut die Maschine entsprechend kürzer und benötigt weniger Stellfläche als die nach dem Ausführungsbeispiel der Figur 1.As a result of the omission of the separate drying tower, the machine builds correspondingly shorter and requires less footprint than that of the embodiment of the FIG. 1 ,

Im Ausführungsbeispiel nach Figur 3 folgen auf das letzte Druckwerk 8d des Widerdruckteils vier Lackwerke. Das erste Lackwerk 9a ist vom Rasterwalzentyp und trägt auf die zu lackierende Widerdruckseite einen Effektlack auf. Dieser wird im darauf folgenden Trockenturm 10a getrocknet. Darauf folgt ein Lackwerk 29a für z. B. UV-Lacke, in dem die Widerdruckseite des Bogens mit einem hochglänzenden transparenten Schutzlack flächig überzogen wird. Auf die Wendeeinrichtung 14 folgt dann noch einmal die gleiche Konfiguration von einem Lackwerk 9b für Effektlack, einem Trockenturm 10b und einem Lackwerk 29b, das den hochglänzenden Schutzlack auf die Schöndruckseite aufträgt. Zwischendecktrockner 31a und 31b direkt über den Druckzylindern 129a und b der Lackwerke 29a und 29b verfestigen den UV-Lack mit Ultraviolettstrahlung entsprechend angepasster Wellenlänge. Bei diesem Ausführungsbeispiel sind die Trocknereinschübe im Ausleger 25 entbehrlich.In the embodiment according to FIG. 3 follow on the last printing unit 8d of the counter-pressure part four coating units. The first coating unit 9a is of the screen roller type and carries an effect varnish on the reverse side to be varnished. This is dried in the subsequent drying tower 10a. This is followed by a coating unit 29a for z. B. UV coatings, in which the reverse side of the sheet is covered with a high-gloss transparent protective coating surface. The turning device 14 is followed again by the same configuration of a coating unit 9b for effect paint, a drying tower 10b and a coating unit 29b, which applies the high-gloss protective coating on the recto printing side. Tail-dryers 31a and 31b directly above the printing cylinders 129a and b of the coating units 29a and 29b solidify the UV-lacquer with ultraviolet radiation corresponding to the adapted wavelength. In this embodiment, the dryer trays in the boom 25 are dispensable.

Wenn die Wendeeinrichtung 14 dieser Maschine von Wendebetrieb auf Geradeausbetrieb umgestellt wird, dann lässt sich je nach Einstellung der ersten Wendeeinrichtung 4 entweder die Vorder- oder Rückseite mit vier verschiedenen Lackschichten übereinander versehen. Damit lassen sich sehr spezielle hochwertige Drucksachen herstellen, indem beispielsweise im ersten Lackwerk ein Dispersionslack verdruckt wird, der die Offsetfarben vollflächig abdeckt und damit abschließt, darauf dann Goldlack gedruckt wird und anschließend im dritten Lackwerk zum Erzeugen von Matt-Glanz-Effekten ein Mattlack ebenso wie der Goldlack nur auf bestimmte Stellen des Bildes appliziert wird (Spotlackierung). Anschließend wird im vierten Lackwerk dann der gesamte Bogen mit einem hochglänzenden UV-Lack überzogen.If the turning device 14 of this machine is switched from turning mode to straight mode, then depending on the setting of the first turning device 4, either the front or back can be provided with four different paint layers one above the other. This makes it possible to produce very special high-quality printed matter, for example by printing a dispersion varnish in the first varnish, which covers the offset inks over the entire surface and then ends, then gold varnish is printed and then in the third varnish to produce matt-gloss effects a matt varnish as well the gold paint is applied only to certain parts of the image (spot varnish). Subsequently, in the fourth coating unit, the entire sheet is then covered with a high-gloss UV varnish.

Beim Ausführungsbeispiel nach Figur 4 folgt auf das letzte Druckwerk 8d des Widerdruckteils ein erstes Lackwerk 39a vom Schöpfwalzentyp. Seine Auftragswalze 49a trägt auf die Widerdruckseite des Bogens vollflächig einen wässrigen Dispersionslack auf. Auf den Gegendruckzylinder 59a des Lackwerks 39a folgt eine Transporttrommel 124a, die gleichzeitig als Zuführtrommel der Wendeeinrichtung 24 fungiert. Im Inneren dieser Transporttrommel 124a ist ein Infrarottrockner 125a eingebaut, der den auf der Trommel 124a aufliegenden Bogen bzw. dessen konkave Innenseite mit Infrarotstrahlung und Heißluft beaufschlagt. Die Trommel 124a ist nach Art eines Skeletts aufgebaut, so dass die Strahlung und gegebenenfalls für das Trocknen benutzte Luft auf die Oberfläche des Bogens gelangen kann.According to the embodiment FIG. 4 The last printing unit 8d of the counterpressure part is followed by a first coater roll 39a of the scoop type. Its application roller 49a bears on the reverse side of the sheet over its entire surface an aqueous dispersion coating. The impression cylinder 59a of the coating unit 39a is followed by a transport drum 124a, which simultaneously acts as a feed drum of the turning device 24. In the interior of this transport drum 124a, an infrared dryer 125a is installed, which acts on the drum 124a resting on the sheet or its concave inside with infrared radiation and hot air. The drum 124a is constructed in the manner of a skeleton so that the radiation and any air used for drying may reach the surface of the sheet.

Auf die Trommel 124a folgen dann die Speichertrommel 24b und die Wendetrommel 24c der Wendeeinrichtung 24, an die sich ein zweites Lackwerk 39b vom Schöpfwalzentyp anschließt. Mit dessen Lackauftragszylinder 49b wird nunmehr die Schöndruckseite der Bögen lackiert. An dieses Lackwerk 39b schließt sich der Ausleger 5 an, an dessen Greiferbrücken die beidseitig lackierten Bögen übergeben werden. Mit den beidseitig wirkenden Trocknermodulen 21 a-h im Ausleger 5 wird die Schöndruckseite getrocknet und verbleibende Restfeuchte in der Lackschicht der Widerdruckseite des Bogens ausgetrieben.The drum 124a is then followed by the storage drum 24b and the turning drum 24c of the turning device 24, followed by a second coating unit 39b of the suction roller type. With its paint application cylinder 49b is now the recto printing side of the Bows painted. At this coating unit 39b, the boom 5 joins, on the gripper bridges the sheets painted on both sides are passed. With the double-acting dryer modules 21 ah in the boom 5, the straight printing side is dried and expelled residual moisture in the paint layer of the reverse side of the sheet.

Die Maschine nach diesem Ausführungsbeispiel benötigt weniger Stellfläche, da in Folge der Trocknung aus dem Inneren des Zylinders 124a heraus die Zahl der bogenführenden Zylinder verringert werden kann.The machine according to this embodiment requires less footprint because, as a result of drying out of the interior of the cylinder 124a, the number of sheet-guiding cylinders can be reduced.

Neben den beschriebenen Ausführungsbeispielen sind weitere Modifikationen und Abwandlungen möglich. So kann je nach verwendetem Lack anstelle eines Lackwerks mit Kammerrakel auch ein Lackwerk mit Schöpfwalze eingesetzt werden. Des Weiteren ist es natürlich möglich von vornherein statt der vier Druckwerke für die vier Grundfarben im Schön- und Widerdruckteil der Druckmaschine zusätzliche Druckwerke für das beidseitige Drucken mit z. B. 2 x 2 Sonderfarben vorzusehen.In addition to the described embodiments, further modifications and variations are possible. Thus, depending on the used paint instead of a coating unit with chamber doctor blade and a coating unit with scoop roller can be used. Furthermore, it is of course possible from the outset instead of the four printing units for the four primary colors in the perfecting part of the printing press additional printing units for two-sided printing with z. B. 2 x 2 special colors provide.

Bezugszeichenreference numeral

11
OffsetdruckmaschineOffset
22
Anlegerinvestor
33
Papierstapelstack of paper
44
Wendeeinrichtungturning device
4a, 14a,24a4a, 14a, 24a
Zuführtrommelfeed drum
4b, 14b,24b4b, 14b, 24b
Speichertrommelstorage drum
4c, 14c, 24c4c, 14c, 24c
Wendetrommelbeater
55
Auslegerboom
66
Bogenstapelsheet pile
7a-d7a-d
Druckwerkeprinting units
8a-d8a-d
Druckwerkeprinting units
9a,b9a, b
LackwerkeLackwerke
10a,b10a, b
Trocknereinheitendryer units
11a-h11a-h
Trocknereinschübedryer Bays
1414
Wendeeinrichtungturning device
1515
Greiferbrückengripper bars
18a18a
SeitenwandSide wall
19a,b19a, b
RasternäpfchenwalzenRasternäpfchenwalzen
20a,b20a, b
Kammerrakelchambered doctor blade
21a-h21a-h
Trocknermoduledrier modules
22a,b22a, b
RasterwalzensternAnilox roll star
2424
Wendeeinrichtungturning device
29a,b29a, b
Lackwerkcoating unit
31 a,b31 a, b
ZwischendecktrocknerSteerage dryer
39a,b39a, b
Lackwerkcoating unit
49a49a
Auftragswalzeapplicator roll
59a,b59a, b
GegendruckzylinderImpression cylinder
108a-d108a-d
GegendruckzylinderImpression cylinder
109a,b109a, b
GegendruckzylinderImpression cylinder
119b119b
SeitenwandSide wall
124a124a
Transportzylindertransport cylinder
125a125a
Trocknerdryer
129a,b129a, b
GegendruckzylinderImpression cylinder
139b139b
SeitenwandSide wall

Claims (14)

  1. Sheet-fed offset printing press for printing multiple colours on both sides preferably of sheets of paper, including a first row of successive printing units (7a-d) for printing the first side of the sheet, followed by a turning device (4), followed by a second row of successive printing units (8a-d) for printing the other side of the sheet as well as by one or more subsequent varnishing units (9a, b, 29a, b, 39a, b)
    characterized in
    that the varnishing units (9; 29; 39) and their varnishing blanket cylinders, respectively, are arranged in such a way that the front sides and the rear sides of the passing sheets are varnished, a further turning device (14; 24) being inserted between two varnishing units (9a, b, 29a, b, 39a, b).
  2. Printing press according to Claim 1,
    wherein a drier unit (10a, 39a) is arranged upstream of the further turning device (14) as viewed in the direction of sheet travel.
  3. Printing press according to Claim 1,
    wherein drier devices (21a-h) for drying both sides of the sheets that have been varnished on both sides are provided downstream of the last varnishing unit (9b, 39b) as viewed in the direction of sheet travel.
  4. Printing press according to Claim 1,
    wherein a drier unit (125a) that is arranged in the interior of a drum (124a) transporting the sheets is assigned to at least one of the varnishing units (39a).
  5. Printing press according to one of Claims 1 to 4,
    wherein the first (4) and/or the further turning device (14) is designed to be switchable from a turning mode to a straight mode.
  6. Printing press according to one of Claims 1 to 5,
    wherein the cylinder that receives the turned sheets is the impression cylinder (109b) of the varnishing unit (9b) that follows the further turning device (14).
  7. Printing press according to Claim 6,
    wherein the turning drum (14c, 24c) of the further turning device (14, 24) is supported in the side walls (119b, 139b) of the varnishing unit (9b, 39b).
  8. Printing press according to one of Claims 1 to 7,
    wherein one or more of the varnishing units (9a, b, 29a, b, 39a, b) is designed for the application of water-based varnishes and dispersion varnishes, respectively.
  9. Printing press according to one of Claims 1 to 7,
    wherein one or more of the varnishing units (9a, b, 29a, b) includes a screen roller (19a, 19b) with a doctor blade (20a, 20b).
  10. Method for printing multiple colours on both sides of sheets, preferably sheets of paper, comprising the following steps carried out in the order as described:
    a) the stacked sheets are individually fed to multiple successive printing units (7a-d) to be printed on the front side of the sheet,
    b) the sheets that have been printed in this way are turned and multiple colours are printed on their rear sides in a number of further successive printing units (8a-d),
    c) the printed rear sides of the sheets are provided with one or more layers of varnish,
    d) the sheets are turned and subsequently the front side of the sheets, which was the first to be printed, is varnished,
    e) the sheets that have been printed and varnished on both sides are delivered onto a stack (6) or are further processed.
  11. Method according to Claim 10,
    wherein the sheets are dried after being varnished.
  12. Method according to Claim 11,
    wherein the varnished perfecting sides of the sheets are dried before the sheets are turned over a second time.
  13. Method according to one of Claims 11 or 12,
    wherein in the drying step, radiation and/or hot air are applied to that side of the sheets that concavely faces a transport cylinder (124a).
  14. Method according to one of Claims 11 to 13,
    wherein the sheets are dried on both sides after being turned over for the second time.
EP07110749A 2006-07-18 2007-06-21 Sheet-fed offset printing press Not-in-force EP1880845B1 (en)

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DE102006033104A DE102006033104A1 (en) 2006-07-18 2006-07-18 Sheetfed Offset Press

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EP1880845A3 (en) 2011-06-22
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US20080017057A1 (en) 2008-01-24
CN101108551B (en) 2012-05-16
CN101108551A (en) 2008-01-23
EP1880845A2 (en) 2008-01-23
DE102006033104A1 (en) 2008-01-24
JP5074840B2 (en) 2012-11-14

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