EP1442884B1 - Method for stably guiding a partial width web in a printing unit of a printing press - Google Patents

Method for stably guiding a partial width web in a printing unit of a printing press Download PDF

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Publication number
EP1442884B1
EP1442884B1 EP04001274A EP04001274A EP1442884B1 EP 1442884 B1 EP1442884 B1 EP 1442884B1 EP 04001274 A EP04001274 A EP 04001274A EP 04001274 A EP04001274 A EP 04001274A EP 1442884 B1 EP1442884 B1 EP 1442884B1
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EP
European Patent Office
Prior art keywords
printing
unit
protective medium
roller
metering
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EP04001274A
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German (de)
French (fr)
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EP1442884A1 (en
Inventor
Georg Schmid
Martin Endisch
Josef Singler
Konrad Brummer
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Manroland AG
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Manroland AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/20—Ink-removing or collecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles

Definitions

  • the invention relates to a method for a stable machine operation on printing units of a rotary printing machine for the operation with partially wide printing material according to claim 1.
  • WO 02058931 A2 is a device for improving the printing process, for example, in production with part-width paper webs known, applied to the non-printing areas of the rollers of the inking unit, in particular on the two ends of these rollers, the ink dissolving or decomposing solvent or applied dropwise to the At the ends of the rollers applied and accumulated ink to prevent loss of solvent and thus a resulting drying and sticking of the ink.
  • the disadvantage is that the solvent applied to the rollers or in the edge region of the rollers cums with time and with increasing speed and contaminates the printing press.
  • drying problems can occur at the edge of the paper web, as a result, a greasing in the dryer or depositing and / or marking in the folding structure or folder can occur.
  • the invention has the object to eliminate the above-mentioned disadvantages and to provide a method for a stable machine operation on printing units of an offset rotary printing press for the operation with varying and partially wide substrate, by means of which drying out of the ink at the non-printing areas of the rollers and cylinders Pressure unit is prevented and thus the stickiness - the so-called tack - is kept at a low level to reduce the risk of web breaks, and to reduce the burden of the rollers and blankets (sleeves).
  • a non-flowing medium such as a commercial roller paste or a roller grease
  • a non-flowing medium is finely distributed to the non-printing areas of a cylinder or a roller in the inking or dampening unit by means of blown air.
  • the non-flowing medium adheres to the surface of the cylinder or roller and prevents the paint from drying out and accumulating.
  • the non-flowing medium is finely distributed to the surface, ie to the non-printing areas, the cylinder or the roller in the inking or dampening unit by means of compressed air.
  • the non-flowing medium can be applied for example by means of a metering on the rider roll, such as a ceramic rider roll, or at any other incoming nip.
  • the non-flowing medium is distributed at the non-printing areas in the entire inking unit or in the entire roller mill. When operating with partially wide web color accumulates at the non-printing zones.
  • doctor units can be adjusted to remove the adhering in the course of the printing process and accumulating mixture of ink and non-flowing medium. Due to the axial movement of the rubbing cylinder in an inking unit, the ink has the characteristic during the printing process to migrate outward on the individual rollers and / or cylinders and build up on the rollers. Of the On the one hand, color build-up causes the machine to be sprayed and dirty, on the other hand, the color build-up causes higher wear of the rollers and blankets and reduces their service life. With the doctor units, it is now possible to produce a color flow by the doctor unit decreases the color of the rider roll and feeds the paint collector.
  • the squeegees By moving the squeegees on their receiving unit axially, or arranges in a certain way, can also make color separations on the roller or adjustments to narrower substrates.
  • the squeegees determine the track edge of the colored strip. But since several doctor blades can be arranged close to each other, the entire remaining color-free range can be covered, so that will certainly prevent spreading of the color beyond the track edge even with prolonged printing duration. But you can also adjust the width of the individual squeegee the width of the color-free zone, the squeegees of different widths are arranged interchangeable.
  • the operation of the doctor blade units takes place from the control desk.
  • the ink / protective medium mixture is removed by the doctor blade device, for example, from the rider roll or other rollers and / or cylinders, wherein both the setting and setting time can be freely selected depending on the production requirements.
  • each setting or Abrakelvorgang fresh non-flowing protective medium, such as roller paste is applied with a short time delay and the cycle begins again.
  • the doctor blades are switched on and off by means of a pneumatic cylinder, wherein the contact pressure of the doctor blade on the rider roll is adjustable. The squeegee must be evenly but only slightly adjusted to avoid excessive wear.
  • At least two lubrication points are provided on a printing unit in order to be able to apply the non-flowing medium to the non-printing areas.
  • the Fig. 1 shows an offset rotary printing machine 1 consisting of four printing units 2 to 5, wherein the printing units 2 to 5 can print a substrate 6, for example, both sides.
  • the in Fig. 1 shown printing material 6 does not draw on the total printing width 8 of individual rollers 9 and cylinder 10 of the printing units 2 to 5, so that at the respective edge zones of the rollers 9 and cylinder 10 non-printing areas 11 and 12 arise.
  • the printing units 2 to 5 thus print a part-width printing material 6.
  • metering nozzles 13 are arranged, by means of which, with the aid of blowing air, a non-flowing protective medium 14 on the surface.
  • the protective medium 14 is in the viscosity range of about 300 to 400 dPa * s.
  • Fig. 2 shows one of the printing units 2 to 5, wherein the printing material 6 is passed between two transfer cylinders 15, 16 and printed on both sides.
  • the transfer cylinders 15, 16 are connected to the form cylinders 17, 18 in connection, wherein the forme cylinder 17, 18 are supplied by built-up of several rolls color 19, 20 and dampening units 21, 22 with printing ink and dampening solution.
  • On at least one of the rollers of the ink 19, 20 and / or dampening 21, 22 and / or on one of the cylinders 15 to 18 is at its non-printing areas 11, 12, a doctor unit 23 on and off.
  • the doctor unit 23 on a rider roller 24 of the inking and dampening roller train on and off.
  • the metering nozzles 13 are arranged, for example, on the rider roll 24 and / or on an incoming gap 40 between a transfer roll 7 and the rider roll 24, or at any incoming nip.
  • the non-flowing protective medium 14 is distributed to the non-printing areas 11,12 throughout the inking unit 19, 20 or in the entire roller mill according to the width of the non-printing area 11,12.
  • the metering nozzles 13 can be positioned according to the width of the non-printing area 11,12 and / or activated accordingly, wherein a plurality of metering nozzles 13 can be arranged on the non-printing areas 11, 12 and by means of a computer and / or control unit, by means of the control station or can be controlled, activated and / or positioned by means of the machine control.
  • the metering nozzles 13 are supplied, for example, by a pump system 25 with distributor unit 26 with the protective medium 14.
  • An offset rotary printing machine 1, not shown in detail, can be equipped with a plurality of pump systems 25 for different printing units 2 to 5 and / or for different printing inks to be processed by means of the printing units 2 to 5.
  • the doctor unit 23 for example consisting of one or more doctor blades 27 and a rotating body, not shown, extends parallel to the rider roll 24 and is adjustable against this, wherein the doctor unit 23 is capable of, located on the rider roll 24 mixture of ink and not remove the flowing protective medium 14.
  • a doctor blades 27 are employed. These doctor blades 27 are fastened by means of a clamping unit 28 to a rod 29 whose axis is also parallel to the rider roll 24.
  • a collecting container 30 arranged below the squeegee 27.
  • adjustments to the respective width of the printing materials 6 can also be made. It is also possible to adapt the width of the individual squeegees 27 to the width of the non-printing regions 11, 12, with the squeegees 27 of different width being arranged to be exchangeable.
  • the doctor unit 23 is mounted in lever arms 31, which are connected to a pressure-medium-operated cylinder 32, by means of this cylinder 32, the doctor unit 23 on the rider roll 24 on and off.
  • Fig. 3 shows a metering unit 33, which consists of a pneumatically actuated valve 34, whereby in a defined time protective medium is metered into a blast air line 35.
  • the protective medium 14 is conveyed by means of the pump system 25 via the distributor unit 26 and lines 38, 39 to the metering valve 34. While the Blas Kunststoff effet 35 is acted upon, a small amount of protective medium 14 is passed into the Blas Kunststoffstrom 37. Due to the strong Ausblasströmung the protective medium 14 is divided and applied by the metering nozzles 13 finely distributed on the surface of the respective roller 9 and / or cylinder 10.
  • Fig. 4 shows a further metering unit 33 ', which consists of at least two pneumatically actuated valves 34', 41, wherein between the first valve 34 'and the second valve 41, a chamber 36 for metering the protective medium 14 is formed.
  • the protective medium 14 is conveyed by means of the pump system 25 'via the distributor unit 26' and lines 38 ', 39' in the chamber 36, wherein the first valve 34 'is opened and the second valve 41 remains closed.
  • the chamber 36 is completely or depending on the amount conveyed partially filled with protective medium 14, wherein the first valve 34 'is closed.
  • the second valve 41 is first opened and the first valve 34 'is supplied with blown air 37'.
  • the blown air 37 ' which penetrates into the chamber 36 in a pulsed or jerky manner, blows out the metered protective medium 14, whereby it is applied in a finely distributed manner on the surface of the respective roller 9 and / or cylinder 10 by the metering nozzles 13'.
  • the device is not intended to be limited to use only on offset rotary presses, especially sheetfed or web offset rotary presses.
  • the device can also be used on rotary high-pressure machines, for example flexographic printing presses, or rotogravure presses.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
  • Rotary Presses (AREA)

Description

Die Erfindung betrifft ein Verfahren für einen stabilen Maschinenlauf an Druckeinheiten einer Rotationsdruckmaschine für den Betrieb mit teilbreitem Bedruckstoff gemäß Anspruch 1.The invention relates to a method for a stable machine operation on printing units of a rotary printing machine for the operation with partially wide printing material according to claim 1.

Aus US 5,046,416 ist ein Druckwerk bekannt, dem ein Farbreduzierwerk zugeordnet ist. Dieses Farbreduzierwerk rakelt nicht benötigte Druckfarbe von einem farbführenden Zylinder des Druckwerks ab. Zur Erleichterung des Abrakelns kann zusätzlich mit einer Sprühvorrichtung ein Lösungsmittel aufgebracht werden.Out US 5,046,416 is known a printing unit, which is associated with a Farbreduzierwerk. This color reducer scans unwanted ink from a color-leading cylinder in the print engine. To facilitate the doctoring, a solvent can additionally be applied with a spray device.

Aus der WO 02058931 A2 ist eine Vorrichtung zur Verbesserung des Druckprozesses beispielsweise bei Produktion mit teilbreiten Papierbahnen bekannt, wobei auf die nicht druckenden Bereiche der Walzen des Farbwerkes, insbesondere auf die beiden Enden dieser Walzen, ein die Druckfarbe auflösendes oder zersetzendes Lösungsmittel aufgebracht bzw. tropfenweise aufgebracht wird, um die an den Enden der Walzen aufgebrachte und angesammelte Druckfarbe an einem Verlust an Lösungsmittel und somit an einem daraus resultierenden Austrocknen und Verkleben der Druckfarbe zu hindern.From the WO 02058931 A2 is a device for improving the printing process, for example, in production with part-width paper webs known, applied to the non-printing areas of the rollers of the inking unit, in particular on the two ends of these rollers, the ink dissolving or decomposing solvent or applied dropwise to the At the ends of the rollers applied and accumulated ink to prevent loss of solvent and thus a resulting drying and sticking of the ink.

Nachteilig ist, dass das auf die Walzen bzw. im Randbereich der Walzen aufgebrachte Lösungsmittel mit der Zeit und mit zunehmender Geschwindigkeit abspritzt und die Druckmaschine verschmutzt. Darüber hinaus können Trocknungsprobleme am Rande der Papierbahn auftreten, wobei als Folge ein Abschmieren im Trockner oder Ablegen und/oder Markieren im Falzaufbau oder Falzwerk auftreten kann.The disadvantage is that the solvent applied to the rollers or in the edge region of the rollers cums with time and with increasing speed and contaminates the printing press. In addition, drying problems can occur at the edge of the paper web, as a result, a greasing in the dryer or depositing and / or marking in the folding structure or folder can occur.

Der Erfindung liegt die Aufgabe zu Grunde oben genannte Nachteile zu beseitigen und ein Verfahren für einen stabilen Maschinenlauf an Druckeinheiten einer Offsetrotationsdruckmaschine für den Betrieb mit wechselndem und teilbreitem Bedruckstoff zu schaffen, mittels welcher ein Austrocknen der Farbe an den nicht druckenden Bereichen der Walzen und Zylinder der Druckeinheit unterbunden wird und somit die Klebrigkeit - den sogenannten Tack - auf einem geringen Niveau gehalten wird, um das Risiko für Bahnrisse zu mindern, sowie die Belastung der Walzen und Gummitücher (Sleeves) zu reduzieren.The invention has the object to eliminate the above-mentioned disadvantages and to provide a method for a stable machine operation on printing units of an offset rotary printing press for the operation with varying and partially wide substrate, by means of which drying out of the ink at the non-printing areas of the rollers and cylinders Pressure unit is prevented and thus the stickiness - the so-called tack - is kept at a low level to reduce the risk of web breaks, and to reduce the burden of the rollers and blankets (sleeves).

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is solved by the features in the characterizing part of patent claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen in Verbindung mit der Beschreibung zu entnehmen.Advantageous embodiments of the invention are described in the dependent claims in conjunction with the description.

Bedeutungsvoll ist, dass mittels des Verfahrens ein nicht fließendes Medium, beispielsweise eine handelsübliche Walzenpaste oder ein Walzenfett, auf die nicht druckenden Bereiche eines Zylinders oder einer Walze im Farb- oder Feuchtwerk mittels Blasluft fein verteilt aufgebracht wird.
Das nicht fließende Medium haftet an der Oberfläche des Zylinders oder der Walze an und verhindert ein Austrocknen und Kumulieren der Farbe.It is significant that by means of the method, a non-flowing medium, such as a commercial roller paste or a roller grease, is finely distributed to the non-printing areas of a cylinder or a roller in the inking or dampening unit by means of blown air.
The non-flowing medium adheres to the surface of the cylinder or roller and prevents the paint from drying out and accumulating.

Über ein Pumpensystem mit Verteilereinheit wird das nicht fließende Medium auf die Oberfläche, d.h. auf die nicht druckenden Bereiche, des Zylinders oder der Walze im Farb- oder Feuchtwerk mittels Druckluft fein verteilt aufgebracht. Das nicht fließende Medium kann beispielsweise mittels einer Dosierdüse auf der Reiterwalze, beispielsweise eine Keramik-Reiterwalze, oder an jedem anderen einlaufenden Walzenspalt aufgebracht werden. Durch Spaltungsvorgänge verteilt sich das nicht fließende Medium an den nicht druckenden Bereichen im gesamten Farbwerk bzw. im gesamten Walzenstuhl.
Bei Betrieb mit teilbreiter Bahn sammelt sich Farbe an den nicht druckenden Zonen.Via a pump system with distributor unit, the non-flowing medium is finely distributed to the surface, ie to the non-printing areas, the cylinder or the roller in the inking or dampening unit by means of compressed air. The non-flowing medium can be applied for example by means of a metering on the rider roll, such as a ceramic rider roll, or at any other incoming nip. By splitting operations, the non-flowing medium is distributed at the non-printing areas in the entire inking unit or in the entire roller mill.
When operating with partially wide web color accumulates at the non-printing zones.

Deshalb sind zusätzlich an die nicht druckenden Bereiche der Reiterwalze Rakeleinheiten anstellbar, um das im Laufe des Druckprozesses anhaftende und sich anhäufende Gemisch von Druckfarbe und nicht fließendem Medium abzutragen. Bedingt durch die axiale Bewegung des Reibzylinders in einem Farbwerk hat die Farbe während des Druckvorganges die Eigenschaft, auf den einzelnen Walzen und/oder Zylinder nach außen zu wandern und sich an den Walzen aufzubauen. Der Farbaufbau bewirkt einerseits Abspritzungen und Verschmutzungen der Maschine, andererseits bewirkt der Farbaufbau einen höheren Verschleiß der Walzen und Gummitücher und reduziert deren Lebensdauer.
Mit den Rakeleinheiten ist nun die Möglichkeit gegeben, einen Farbfluss zu erzeugen, indem die Rakeleinheit die Farbe von der Reiterwalze abnimmt und dem Farbenauffangbehälter zuführt. Indem man die Rakeln an ihrer Aufnahmeeinheit axial verschiebt, oder in bestimmter Weise anordnet, lassen sich auch Farbtrennungen auf der Walze oder Anpassungen an schmälere Bedruckstoffe vornehmen.
Die Rakeln bestimmen einerseits die Spurkante des Farbstreifens. Da aber mehrere Rakeln eng nebeneinander angeordnet werden können, lässt sich der gesamte farbfrei bleiben sollende Bereich abdecken, so dass mit Sicherheit ein Ausbreiten der Farbe über die Spurkante hinaus selbst bei längerer Druckdauer verhindern wird. Man kann aber auch die Breite der einzelnen Rakel der Breite der farbfreien Zone anpassen, wobei die Rakeln unterschiedlicher Breite austauschbar angeordnet werden.Therefore, in addition to the non-printing areas of the rider roll doctor units can be adjusted to remove the adhering in the course of the printing process and accumulating mixture of ink and non-flowing medium. Due to the axial movement of the rubbing cylinder in an inking unit, the ink has the characteristic during the printing process to migrate outward on the individual rollers and / or cylinders and build up on the rollers. Of the On the one hand, color build-up causes the machine to be sprayed and dirty, on the other hand, the color build-up causes higher wear of the rollers and blankets and reduces their service life.
With the doctor units, it is now possible to produce a color flow by the doctor unit decreases the color of the rider roll and feeds the paint collector. By moving the squeegees on their receiving unit axially, or arranges in a certain way, can also make color separations on the roller or adjustments to narrower substrates.
On the one hand, the squeegees determine the track edge of the colored strip. But since several doctor blades can be arranged close to each other, the entire remaining color-free range can be covered, so that will certainly prevent spreading of the color beyond the track edge even with prolonged printing duration. But you can also adjust the width of the individual squeegee the width of the color-free zone, the squeegees of different widths are arranged interchangeable.

Die Bedienung der Rakeleinheiten erfolgt vom Leitstand aus. Beispielsweise nach einem am Leitstand einstellbaren Zeitzyklus wird das Farb-/Schutzmediumgemisch durch die Rakeleinrichtung beispielsweise von der Reiterwalze oder anderen Walzen und/oder Zylindern abgetragen, wobei sowohl die Ab- und Anstelldauer je nach Produktionserfordernissen frei wählbar ist. Nach jedem Anstell- bzw. Abrakelvorgang wird mit einer kurzen Zeitverzögerung frisches nicht fließendes Schutzmedium, beispielsweise Walzenpaste, aufgetragen und der Zyklus beginnt erneut.
Die Rakeln sind mittels eines Pneumatikzylinders an- und abstellbar, wobei der Anpressdruck des Rakels an der Reiterwalze einstellbar ist. Das Rakel muss gleichmäßig aber nur leicht angestellt sein, um einen zu hohen Verschleiß zu vermeiden.The operation of the doctor blade units takes place from the control desk. For example, after a time cycle that can be set on the control console, the ink / protective medium mixture is removed by the doctor blade device, for example, from the rider roll or other rollers and / or cylinders, wherein both the setting and setting time can be freely selected depending on the production requirements. After each setting or Abrakelvorgang fresh non-flowing protective medium, such as roller paste, is applied with a short time delay and the cycle begins again.
The doctor blades are switched on and off by means of a pneumatic cylinder, wherein the contact pressure of the doctor blade on the rider roll is adjustable. The squeegee must be evenly but only slightly adjusted to avoid excessive wear.

Durch automatisiertes Dosieren von Walzenpaste in den Randbereichen des Farbwerkes oder der Druckeinheit wird speziell bei teilbreiten Produktionen die Belastung auf die Gummizylinderhülse, das Gummituch und die Farbwalzen reduziert.
Je nach Breite des Bedruckstoffes sind entsprechend viele Rakelmesser anzubringen.
Das von der Rakel abgetragene Farb-/Schutzmediumgemisch wird in einer Farbwanne gesammelt, welche unterhalb der Rakel angeordnet ist. Diese muss von Zeit zu Zeit entleert werden.By automated dosing of roller paste in the edge areas of the inking unit or the printing unit, especially for partial width productions Reduced load on the rubber cylinder sleeve, blanket and ink rollers.
Depending on the width of the printing material correspondingly many doctor blades are to be attached.
The ink / protective medium mixture removed by the doctor blade is collected in a paint trough which is arranged below the doctor blade. This must be emptied from time to time.

An einer Druckeinheit sind mindestens 2 Schmierstellen vorgesehen, um auf die nicht druckenden Bereiche das nicht fließende Medium auftragen zu können.At least two lubrication points are provided on a printing unit in order to be able to apply the non-flowing medium to the non-printing areas.

Die Erfindung soll nachfolgend an einem Ausführungsbeispiel und anhand der Figuren näher erläutert werden. Es zeigen stark schematisiert:

Fig. 1
Offsetrotationsdruckmaschine mit Vorrichtung für einen stabilen Maschinenlauf zur Produktion mit teilbreitem Bedruckstoff,
Fig. 2
Seitenansicht einer Druckeinheit der Offsetrotationsdruckmaschine nach Fig. 1,
Fig. 3
eine Dosiereinheit,
Fig. 4
eine Dosiereinheit und
Fig. 5
eine Vorrichtung für einen stabilen Maschinenlauf nach Fig. 2.
The invention will be explained in more detail below using an exemplary embodiment and with reference to the figures. It shows very schematically:
Fig. 1
Offsetting rotary printing machine with a device for a stable machine run for the production with part wide printing material,
Fig. 2
Side view of a printing unit of the offset rotary printing machine according to Fig. 1 .
Fig. 3
a dosing unit,
Fig. 4
a dosing unit and
Fig. 5
a device for a stable machine after Fig. 2 ,

Die Fig. 1 zeigt eine Offsetrotationsdruckmaschine 1 bestehend aus vier Druckeinheiten 2 bis 5, wobei die Druckeinheiten 2 bis 5 einen Bedruckstoff 6 beispielsweise beidseitig bedrucken können. Der in Fig. 1 dargestellte Bedruckstoff 6 schöpft nicht die Gesamtdruckbreite 8 einzelner Walzen 9 und Zylinder 10 der Druckeinheiten 2 bis 5 aus, so dass an den jeweiligen Randzonen der Walzen 9 und Zylinder 10 nicht druckende Bereiche 11 und 12 entstehen. Die Druckeinheiten 2 bis 5 bedrucken somit einen teilbreiten Bedruckstoff 6. An den nicht druckenden Bereichen 11 und 12 sind Dosierdüsen 13 angeordnet, mittels derer unter Zuhilfenahme von Blasluft ein nicht fließendes Schutzmedium 14 auf die Oberfläche . der jeweiligen Walzen 9 und/oder Zylinder 10 fein verteilt aufgetragen wird. Das Schutzmedium 14 liegt im Viskositätsbereich von ca. 300 bis 400 dPa*s.The Fig. 1 shows an offset rotary printing machine 1 consisting of four printing units 2 to 5, wherein the printing units 2 to 5 can print a substrate 6, for example, both sides. The in Fig. 1 shown printing material 6 does not draw on the total printing width 8 of individual rollers 9 and cylinder 10 of the printing units 2 to 5, so that at the respective edge zones of the rollers 9 and cylinder 10 non-printing areas 11 and 12 arise. The printing units 2 to 5 thus print a part-width printing material 6. At the non-printing areas 11 and 12 metering nozzles 13 are arranged, by means of which, with the aid of blowing air, a non-flowing protective medium 14 on the surface. the respective rollers 9 and / or cylinder 10 is applied finely distributed. The protective medium 14 is in the viscosity range of about 300 to 400 dPa * s.

Fig. 2 zeigt eine der Druckeinheiten 2 bis 5, wobei der Bedruckstoff 6 zwischen zwei Übertragungszylindern 15, 16 hindurchgeführt und beidseitig bedruckt wird. Die Übertragungszylinder 15, 16 stehen mit Formzylindern 17, 18 in Verbindung, wobei die Formzylinder 17, 18 von aus mehreren Walzen aufgebauten Farb- 19, 20 und Feuchtwerken 21, 22 mit Druckfarbe und Feuchtmittel versorgt werden. An mindestens einer der Walzen der Farb- 19, 20 und/oder Feuchtwerke 21, 22 und/oder an einem der Zylinder 15 bis 18 ist an dessen nicht druckenden Bereichen 11, 12 eine Rakeleinheit 23 an- und abstellbar.
Beispielsweise kann, wie in Fig. 2 dargestellt, die Rakeleinheit 23 an eine Reiterwalze 24 des Farb- und Feuchtwerkswalzenzuges an- und abgestellt werden. Die Dosierdüsen 13 sind beispielsweise an der Reiterwalze 24 und/oder an einem einlaufenden Spalt 40 zwischen einer Übertragwalze 7 und der Reiterwalze 24, oder an einem beliebigen einlaufenden Walzenspalt angeordnet. Durch Spaltungsvorgänge verteilt sich das nicht fließende Schutzmedium 14 an den nicht druckenden Bereichen 11,12 im gesamten Farbwerk 19, 20 bzw. im gesamten Walzenstuhl entsprechend der Breite des nicht druckenden Bereiches 11,12. Die Dosierdüsen 13 sind entsprechend der Breite des nicht druckenden Bereiches 11,12 positionierbar und/oder entsprechend aktivierbar, wobei mehrere Dosierdüsen 13 an den nicht druckenden Bereichen 11, 12 angeordnet werden können und mittels einer Rechner- und/oder Steuerungseinheit, mittels des Leitstandes oder mittels der Maschinensteuerung angesteuert, aktiviert und/oder positioniert werden können. Die Dosierdüsen 13 werden beispielsweise von einem Pumpensystem 25 mit Verteilereinheit 26 mit dem Schutzmedium 14 versorgt. Dabei erfolgt die Steuerung oder Regelung der Dosiermenge und Auftragsdauer an Schutzmedium 14, nicht näher dargestellt, mittels des Leitstandes oder der Maschinensteuerung, wobei unter Berücksichtigung der allgemeinen Betriebszustände, insbesondere Bedruckstoffbreite, Laufgeschwindigkeit der Maschine, Länge des Druckauftrages und Temperaturen im Walzenstuhl und in der Zylindergruppe, das Aufbringen des Schutzmediums und/oder das Abrakeln des Gemisches aus Schutzmedium und Druckfarbe gesteuert wird.
Eine Offsetrotationsdruckmaschine 1 kann, nicht näher dargestellt, mit mehrere Pumpensystemen 25 für unterschiedliche Druckeinheiten 2 bis 5 und/oder für unterschiedliche mittels der Druckeinheiten 2 bis 5 zu verarbeitende Druckfarben ausgestattet sein. Fig. 2 shows one of the printing units 2 to 5, wherein the printing material 6 is passed between two transfer cylinders 15, 16 and printed on both sides. The transfer cylinders 15, 16 are connected to the form cylinders 17, 18 in connection, wherein the forme cylinder 17, 18 are supplied by built-up of several rolls color 19, 20 and dampening units 21, 22 with printing ink and dampening solution. On at least one of the rollers of the ink 19, 20 and / or dampening 21, 22 and / or on one of the cylinders 15 to 18 is at its non-printing areas 11, 12, a doctor unit 23 on and off.
For example, as in Fig. 2 shown, the doctor unit 23 on a rider roller 24 of the inking and dampening roller train on and off. The metering nozzles 13 are arranged, for example, on the rider roll 24 and / or on an incoming gap 40 between a transfer roll 7 and the rider roll 24, or at any incoming nip. By cleavage operations, the non-flowing protective medium 14 is distributed to the non-printing areas 11,12 throughout the inking unit 19, 20 or in the entire roller mill according to the width of the non-printing area 11,12. The metering nozzles 13 can be positioned according to the width of the non-printing area 11,12 and / or activated accordingly, wherein a plurality of metering nozzles 13 can be arranged on the non-printing areas 11, 12 and by means of a computer and / or control unit, by means of the control station or can be controlled, activated and / or positioned by means of the machine control. The metering nozzles 13 are supplied, for example, by a pump system 25 with distributor unit 26 with the protective medium 14. In this case, the control or regulation of the dosing and application duration of protective medium 14, not shown in detail, by means of the control station or the machine control, taking into account the general operating conditions, in particular Substrate width, machine speed, length of the print job and temperatures in the roll mill and in the cylinder group, the application of the protective medium and / or the doctoring of the mixture of protective medium and ink is controlled.
An offset rotary printing machine 1, not shown in detail, can be equipped with a plurality of pump systems 25 for different printing units 2 to 5 and / or for different printing inks to be processed by means of the printing units 2 to 5.

Die erfindungsgemäße Rakeleinheit 23 (siehe Fig. 5), beispielsweise bestehend aus einer oder mehreren Rakeln 27 und einem nicht näher dargestellten Rotationskörper, erstreckt sich parallel zur Reiterwalze 24 und ist so gegen diese anstellbar, wobei die Rakeleinheit 23 in der Lage ist, das auf der Reiterwalze 24 befindliche Gemisch von Druckfarbe und nicht fließendem Schutzmedium 14 abzutragen.
Gegen die Mantelfläche des an die Reiterwalze 24 anstellbaren Rotationskörpers oder gegen die Mantelfläche der Reiterwalze 24 sind eine oder mehrere Rakeln 27 angestellt. Diese Rakeln 27 sind mit Hilfe einer Spanneinheit 28 an einer Stange 29 befestigt, deren Achse ebenfalls parallel zur Reiterwalze 24 verläuft. Das mit der Rakel 27 von der Mantelfläche abgenommene Gemisch aus Druckfarbe und nicht fließendem Schutzmedium 14 wird in einem unterhalb der Rakel 27 angeordneten Auffangbehälter 30 verbracht.
Indem man die Rakeln 27 an der Stange 29 axial verschiebt, oder in bestimmter Weise anordnet, lassen sich auch Anpassungen an die jeweilige Breite der Bedruckstoffe 6 vornehmen.
Man kann auch die Breite der einzelnen Rakel 27 der Breite der nicht druckenden Bereiche 11, 12 anpassen, wobei die Rakeln 27 unterschiedlicher Breite austauschbar angeordnet werden.
Die Rakeleinheit 23 ist in Hebelarmen 31 gelagert, welche mit einem druckmittelbetriebenen Zylinder 32 verbunden sind, wobei mittels dieses Zylinders 32 die Rakeleinheit 23 an die Reiterwalze 24 an- und abstellgestellt wird.The doctor unit 23 according to the invention (see Fig. 5 ), for example consisting of one or more doctor blades 27 and a rotating body, not shown, extends parallel to the rider roll 24 and is adjustable against this, wherein the doctor unit 23 is capable of, located on the rider roll 24 mixture of ink and not remove the flowing protective medium 14.
Against the lateral surface of the rotatable against the rider roll 24 or against the lateral surface of the rider roll 24 one or more doctor blades 27 are employed. These doctor blades 27 are fastened by means of a clamping unit 28 to a rod 29 whose axis is also parallel to the rider roll 24. The mixture of printing ink and non-flowing protective medium 14, which has been removed from the lateral surface with the squeegee 27, is transferred to a collecting container 30 arranged below the squeegee 27.
By axially displacing the doctor blades 27 on the rod 29, or arranging them in a specific manner, adjustments to the respective width of the printing materials 6 can also be made.
It is also possible to adapt the width of the individual squeegees 27 to the width of the non-printing regions 11, 12, with the squeegees 27 of different width being arranged to be exchangeable.
The doctor unit 23 is mounted in lever arms 31, which are connected to a pressure-medium-operated cylinder 32, by means of this cylinder 32, the doctor unit 23 on the rider roll 24 on and off.

Fig. 3 zeigt eine Dosiereinheit 33, welche aus einem pneumatisch betätigten Ventil 34 besteht, wodurch in einer definierten Zeit Schutzmedium in eine Blasluftleitung 35 dosiert wird. Das Schutzmedium 14 wird mittels des Pumpensystems 25 über die Verteilereinheit 26 und Leitungen 38, 39 zum Dosierventil 34 gefördert. Während die Blasluftleitung 35 beaufschlagt ist, wird eine geringe Menge Schutzmedium 14 in den Blasluftstrom 37 geleitet. Durch die starke Ausblasströmung wird das Schutzmedium 14 zerteilt und durch die Dosierdüsen 13 fein verteilt auf der Oberfläche der jeweiligen Walze 9 und/oder Zylinder 10 aufgetragen. Fig. 3 shows a metering unit 33, which consists of a pneumatically actuated valve 34, whereby in a defined time protective medium is metered into a blast air line 35. The protective medium 14 is conveyed by means of the pump system 25 via the distributor unit 26 and lines 38, 39 to the metering valve 34. While the Blasluftleitung 35 is acted upon, a small amount of protective medium 14 is passed into the Blasluftstrom 37. Due to the strong Ausblasströmung the protective medium 14 is divided and applied by the metering nozzles 13 finely distributed on the surface of the respective roller 9 and / or cylinder 10.

Fig. 4 zeigt eine weitere Dosiereinheit 33', welche aus mindestens zwei pneumatisch betätigten Ventilen 34', 41 besteht, wobei zwischen dem ersten Ventil 34' und dem zweiten Ventil 41 eine Kammer 36 zur Dosierung des Schutzmediums 14 gebildet wird. Das Schutzmedium 14 wird mittels des Pumpensystems 25' über die Verteilereinheit 26' und Leitungen 38', 39' in die Kammer 36 gefördert, wobei das erste Ventil 34' geöffnet ist und das zweite Ventil 41 geschlossen bleibt. Nach einer entsprechenden Zeitdauer ist die Kammer 36 vollständig oder je nach geförderter Menge teilweise mit Schutzmedium 14 gefüllt, wobei das erste Ventil 34' geschlossen wird. Zum Ausblasen des in der Kammer 36 dosierten Schutzmediums 14 wird zunächst das zweite Ventil 41 geöffnet und das ersten Ventil 34' wird mit Blasluft 37' beaufschlagt. Die in die Kammer 36 beispielsweise impulsartig oder stoßartig eindringende Blasluft 37' bläst das dosierte Schutzmedium 14 aus, wobei es durch die Dosierdüsen 13' fein verteilt auf der Oberfläche der jeweiligen Walze 9 und/oder Zylinder 10 aufgetragen wird. Fig. 4 shows a further metering unit 33 ', which consists of at least two pneumatically actuated valves 34', 41, wherein between the first valve 34 'and the second valve 41, a chamber 36 for metering the protective medium 14 is formed. The protective medium 14 is conveyed by means of the pump system 25 'via the distributor unit 26' and lines 38 ', 39' in the chamber 36, wherein the first valve 34 'is opened and the second valve 41 remains closed. After a corresponding period of time, the chamber 36 is completely or depending on the amount conveyed partially filled with protective medium 14, wherein the first valve 34 'is closed. To blow out the dosed in the chamber 36 protective medium 14, the second valve 41 is first opened and the first valve 34 'is supplied with blown air 37'. For example, the blown air 37 ', which penetrates into the chamber 36 in a pulsed or jerky manner, blows out the metered protective medium 14, whereby it is applied in a finely distributed manner on the surface of the respective roller 9 and / or cylinder 10 by the metering nozzles 13'.

Die Vorrichtung soll sich nicht nur auf die Verwendung an Offsetrotationsdruckmaschinen, insbesondere Bogen- oder Rollenoffsetrotationsdruckmaschinen, beschränken. Die Vorrichtung kann auch an Rotationshochdruckmaschinen, beispielsweise Druckmaschinen für Flexodruck, oder Rotationstiefdruckmaschinen verwendet werden.The device is not intended to be limited to use only on offset rotary presses, especially sheetfed or web offset rotary presses. The device can also be used on rotary high-pressure machines, for example flexographic printing presses, or rotogravure presses.

Bezugszeichen:Reference numerals:

11
OffsetrotationsdruckmaschineOffset rotary printing press
22
Druckeinheitprinting unit
33
Druckeinheitprinting unit
44
Druckeinheitprinting unit
55
Druckeinheitprinting unit
66
Bedruckstoffsubstrate
77
ÜbertragwalzeTransfer roll
88th
GesamtdruckbreiteTotal printing width
99
Walzeroller
1010
Zylindercylinder
1111
Nicht druckende BereichNon-printing area
1212
Nicht druckender BereichNon-printing area
1313
Dosierdüsedispensing nozzle
1414
Schutzmediumprotective medium
1515
Übertragungszylindertransfer cylinder
1616
Übertragungszylindertransfer cylinder
1717
Formzylinderform cylinder
1818
Formzylinderform cylinder
1919
Farbwerkinking
2020
Farbwerkinking
2121
Feuchtwerkdampening
2222
Feuchtwerkdampening
2323
Rakeleinheitsqueegee unit
2424
Reiterwalzeriding roller
25, 25'25, 25 '
Pumpensystempump system
26, 26'26, 26 '
Verteilereinheitdistribution unit
2727
Rakeldoctor
2828
Spanneinheitclamping unit
2929
Stangepole
3030
Auffangbehälterreceptacle
3131
Hebelarmlever arm
3232
Druckmittelbetriebener ZylinderFluid-operated cylinder
33, 33'33, 33 '
Dosiereinheitdosing
34, 34'34, 34 '
VentilValve
3535
Blasluftleitungblast air
3636
Kammerchamber
37, 37'37, 37 '
Luftstrom / BlasluftAir flow / blown air
38, 38'38, 38 '
Leitungmanagement
39, 39'39, 39 '
Leitungmanagement
4040
Einlaufender SpaltIncoming gap
4141
VentilValve

Claims (9)

  1. Method for a stable machine run on printing units (2 to 5) of a rotary printing machine (1), in particular an offset rotary printing machine, for operation with part-width printing material (6), wherein a medium is applied to non-printing regions, characterised in that a non-flowing protective medium (14) is applied to the non-printing regions (11, 12) of at least one roller (9) of an inking unit (19, 20) or dampening unit (21, 22) and/or to the non-printing regions (11, 12) of at least one transfer cylinder (15, 16) or forme cylinder (17, 18) by means of blast air (37) through a metering nozzle (13) in a finely distributed manner with formation of a thin-layer protective film.
  2. Method according to claim 1, characterised in that in the case of a printing unit (2 to 5) having an inking unit (19, 20) and dampening unit (21, 22) with a rider roller (24) and transfer roller (7) with respect to the non-printing regions of the rider roller (24) there is arranged at least one doctor unit (23) that can be thrown on and off, whereby if necessary a mixture of protective medium (14) and printing ink can be removed from the non-printing regions (11, 12) of the rider roller (24).
  3. Method according to claim 2, characterised in that the protective medium (14) is applied to the rider roller (24) and to the transfer roller (7).
  4. Method according to claim 3, characterised in that the metering nozzle (13) is arranged in the inflow nip (40) of the transfer roller (7) and rider roller (24).
  5. Method according to one of claims 1 to 4, characterised in that provided for the supply of the metering nozzle (13) there is a metering unit (33) which consists of a pneumatically actuated valve (34), as a result of which the protective medium (14) is metered into a blast-air line (35) in a defined time.
  6. Method according to one of claims 1 to 4, characterised in that provided for the supply of the metering nozzle (13') there is a metering unit (33') consisting of at least two pneumatically actuatable valves (34', 41), wherein a chamber (36) for metering the protective medium (14) is formed between the first valve (34') and the second valve (41), and the protective medium (14) is conveyed into this chamber (36).
  7. Method according to one of claims 1 to 6, characterised in that the protective medium (14) is a grease, an oil, an ink, a wetting paste or a roller paste and lies in a viscosity range between 300 to 400 dPa*s.
  8. Method according to claim 2, characterised in that the time sequence and the sequence of motions of throwing the doctor units (23) on and off and the application of the protective medium (14) are controlled by a computing and/or control unit.
  9. Method according to claim 8, characterised in that the application of the protective medium (14) and/or the doctoring of the mixture of protective medium (14) and printing ink are/is controlled by the computing and/or control unit in consideration of the general operating states, in particular printing-material width, running speed of the machine, length of the print-application and temperatures in the roller frame and in the cylinder group.
EP04001274A 2003-01-30 2004-01-22 Method for stably guiding a partial width web in a printing unit of a printing press Expired - Lifetime EP1442884B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10303608A DE10303608B4 (en) 2003-01-30 2003-01-30 Method for a stable machine run on printing units of a rotary printing press for operation with partially wide printing material
DE10303608 2003-01-30

Publications (2)

Publication Number Publication Date
EP1442884A1 EP1442884A1 (en) 2004-08-04
EP1442884B1 true EP1442884B1 (en) 2011-03-23

Family

ID=32603038

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Application Number Title Priority Date Filing Date
EP04001274A Expired - Lifetime EP1442884B1 (en) 2003-01-30 2004-01-22 Method for stably guiding a partial width web in a printing unit of a printing press

Country Status (4)

Country Link
US (1) US7004069B2 (en)
EP (1) EP1442884B1 (en)
JP (1) JP2004230887A (en)
DE (2) DE10303608B4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005019881A1 (en) 2005-04-28 2006-11-09 Maschinenfabrik Wifag Printing unit with auxiliary lubrication
KR102229714B1 (en) * 2020-08-14 2021-03-19 드림인더스 주식회사 Printing tape manufacturing method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2236805A (en) * 1940-09-11 1941-04-01 Ralph S Plaisted Ink fountain conversion device for printing presses
DE3800570A1 (en) * 1988-01-12 1989-07-20 Heidelberger Druckmasch Ag PRINTING UNIT FOR ROTATIONAL PRINTING MACHINES
JP2827108B2 (en) * 1996-10-08 1998-11-18 株式会社東京機械製作所 Printing machine dampening device
US5303652A (en) * 1992-02-13 1994-04-19 Baldwin Technology Corporation Spray blanket cleaning system
US5490459A (en) * 1995-02-24 1996-02-13 Heidelberger Druckmaschinen Ag Printing press and method for removing ink build-up with sideways web movement
DE19546260C1 (en) * 1995-12-12 1996-11-21 Weitmann & Konrad Fa Monitoring spray quantity on material conveyor method , e.g. paper path moved towards a moistening position, in graphics industry
US20020100379A1 (en) * 2001-01-26 2002-08-01 Wiese Dennis R. Printing process

Also Published As

Publication number Publication date
US20040182263A1 (en) 2004-09-23
DE10303608A1 (en) 2004-08-19
DE10303608B4 (en) 2008-05-08
DE502004012322D1 (en) 2011-05-05
EP1442884A1 (en) 2004-08-04
JP2004230887A (en) 2004-08-19
US7004069B2 (en) 2006-02-28

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