EP1167024B1 - Method and means for applying imageable coatings in printing machines - Google Patents
Method and means for applying imageable coatings in printing machines Download PDFInfo
- Publication number
- EP1167024B1 EP1167024B1 EP01114001A EP01114001A EP1167024B1 EP 1167024 B1 EP1167024 B1 EP 1167024B1 EP 01114001 A EP01114001 A EP 01114001A EP 01114001 A EP01114001 A EP 01114001A EP 1167024 B1 EP1167024 B1 EP 1167024B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- printing
- rubber blanket
- application
- image
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1075—Mechanical aspects of on-press plate preparation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
- B41P2227/70—Forming the printing surface directly on the form cylinder
Definitions
- the invention relates to a method in printing machines for applying imageable coatings, wherein the printing machine is equipped with a counter-pressure cylinder, a rubber cylinder and a cooperating with an inking unit and possibly a dampening unit printing forme cylinder and the imageable coating with parked inking or dampening on the surface the printing plate cylinder or on the surface of a clamped on the printing form cylinder printing plate is applied.
- the invention further relates to a device in printing machines for applying imageable coatings, wherein the printing machine consists of a counter-pressure cylinder, a rubber cylinder, an inking unit which can be pivoted away from the printing form cylinder and, if appropriate, a printing form cylinder which also interacts with a dampening unit which can likewise be pivoted away, and a coating device for applying the imageable coating .
- the imageable coating can be applied to the surface of the printing form cylinder itself or to the surface of a printing form that can be clamped onto the printing form cylinder, and a device for stopping the blanket cylinder from the impression cylinder and / or the printing form cylinder is provided.
- EP-A-0 368 180 a process for imaging a printing forme cylinder is known in which a picture-adequate substance application is carried out on the blanket cylinder of a rotary printing press by the image-adequate substance is dissolved out of a thermal transfer film with suitable agents. This substance is transferred in ropes to the plate cylinder when the impression cylinder is turned on and when the impression cylinder is turned on.
- a method for imaging or for imaging and neutralization of a printing plate of a printing forme cylinder of a printing press is known.
- the printed image information to be applied to the printing plate is available in digital form.
- a medium carrying the print image information is applied to the printing plate and released again after the printing process.
- the printing plate imaging device optionally includes an integrated curing device and a release device.
- the curing of the medium applied to the printing plate by means of UV curing or radiation curing.
- a disadvantage of this solution is that the installation space for the device for applying the medium is severely limited.
- the realization of the invention provides favorable space for the accommodation of the institutions concerned.
- the accompanying drawing shows a printing unit 1 a multicolour Bogenoffsetrotations printing machine.
- Each printing unit 1 contains, as a sheet-guiding cylinder, a counter-pressure cylinder 2 and a transfer cylinder 3 and a printing form cylinder 4 and a blanket cylinder 5 as a printing image-transferring cylinder.
- the blanket cylinder 5 can be turned off by the impression cylinder 2 and / or the printing form cylinder 4.
- Each printing form cylinder 4 is assigned an inking unit 6 and a dampening unit 7. These are equipped with facilities not shown here, which make their withdrawal from the plate cylinder 4 possible. On the printing form cylinder 4, a (not shown here printing plate) can be clamped.
- the printing form cylinder 4 is further associated with a Becularungs worn 9.
- the imaging device 9 for imaging the printing form cylinder 4 is designed as a laser device which cures the image-carrying elements. According to another method, a laser-based ablation device may also be used.
- the blanket cylinder 5 is assigned a coating device 8 and a washing device 10.
- the coating device 8 is designed here as a chambered doctor blade.
- the washing device 10 can be moved be executed so that it can be used in addition to the cleaning of the blanket cylinder 5 for the cleaning of the printing forme cylinder 4.
- a medium is applied to the surface of the blanket cylinder 5 by the coating device 8. This is done by a chambered doctor blade or other suitable means. Since the blanket cylinder 5 is in contact with the printing form cylinder 4, this medium is transferred to this and built there an imageable coating . During the coating process, a value is chosen for the rotational speed of the blanket cylinder 5 and the plate cylinder 4, which depends on the rheological properties of the coating material.
- the contact between the blanket cylinder 5 and the plate cylinder 4 is released.
- the illustration can now be done. This can be done in different ways depending on the coating material and coating method.
- the medium is cured by the laser of the imaging device 9 at the points carrying the image information so that printing or non-printing areas are formed on the surface of the printing form cylinder 4 or on the surface of the printing form.
- the medium for the coating is self-curing. If the curing of the medium is not possible automatically, the curing can take place parallel to the coating via UV light (polymerization) or via laser beam drying and baking. According to another variant, it is also possible to heat the medium, applied to the printing form cylinder 4 and to achieve the solidification by cooling.
- the printing form cylinder 4 prepared in this way after application of the medium can now be imaged by the imaging device 9 according to the ablation method. As a result of the imaging process, the surface of the layer is subjected to image information so that printing and non-printing areas are formed. Depending on whether the layer is color-friendly or humectant-friendly, the ablation of the layer leads to printing or non-printing areas on the surface of the printing forme cylinder 4.
- the coating material remaining on the surface of the blanket cylinder 5 is washed off or doctored off.
- a washing device 10 is used whose position is movable. As a result, after washing off the coating material from the blanket cylinder 5, the material not cured on the printing form cylinder 4 or on the printing form by the imaging device 9 can also be washed off.
- the contact between the blanket cylinder 5 and the plate cylinder 4 is not interrupted after reaching the required layer thickness.
- the material is simultaneously washed off the blanket cylinder 5 and the printing form cylinder 4 by the washing device 10.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rotary Presses (AREA)
- Printing Methods (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren in Druckmaschinen zum Aufbringen bebilderbarer Beschichtungen, wobei die Druckmaschine mit einem Gegendruckzylinder, einem Gummizylinder und einem mit einem Farbwerk und ggf. mit einem Feuchtwerk zusammenwirkenden Druckformzylinder ausgestattet ist und die bebilderbare Beschichtung bei abgestellten Farb- bzw. Feuchtwerk auf die Oberfläche des Druckformzylinders oder auf die Oberfläche einer auf den Druckformzylinder aufgespannte Druckform aufgebracht wird.The invention relates to a method in printing machines for applying imageable coatings, wherein the printing machine is equipped with a counter-pressure cylinder, a rubber cylinder and a cooperating with an inking unit and possibly a dampening unit printing forme cylinder and the imageable coating with parked inking or dampening on the surface the printing plate cylinder or on the surface of a clamped on the printing form cylinder printing plate is applied.
Die Erfindung betrifft weiterhin eine Einrichtung in Druckmaschinen zum Aufbringen bebilderbarer Beschichtungen, wobei die Druckmaschine aus einem Gegendruckzylinder, einem Gummizylinder, einem mit einem vom Druckformzylinder wegschwenkbaren Farbwerk und ggf. mit einem ebenfalls wegschwenkbaren Feuchtwerk zusammenwirkenden Druckformzylinder und einer Beschichtungseinrichtung zum Aufbringen der bebilderbaren Beschichtung besteht, wobei die bebilderbare Beschichtung auf die Oberfläche des Druckformzylinders selbst oder auf die Oberfläche einer auf den Druckformzylinder aufspannbaren Druckform aufbringbar und eine Einrichtung zum Abstellen des Gummizylinders vom Gegendruckzylinder und/oder vom Druckformzylinder vorgesehen ist.The invention further relates to a device in printing machines for applying imageable coatings, wherein the printing machine consists of a counter-pressure cylinder, a rubber cylinder, an inking unit which can be pivoted away from the printing form cylinder and, if appropriate, a printing form cylinder which also interacts with a dampening unit which can likewise be pivoted away, and a coating device for applying the imageable coating . wherein the imageable coating can be applied to the surface of the printing form cylinder itself or to the surface of a printing form that can be clamped onto the printing form cylinder, and a device for stopping the blanket cylinder from the impression cylinder and / or the printing form cylinder is provided.
Aus der EP-A-0 368 180 ist ein Verfahren zur Bebilderung eines Druckformzylinders bekannt bei dem ein bildadäquater Substanzauftrag auf den Gummituchzylinder einer Rotationsdruckmaschine erfolgt, indem die bildadäquate Substanz aus einer Thermotransferfolie mit geeigneten Mitteln herausgelöst wird. Diese Substanz wird bei angestelltem Druckzylinder und bei angestelltem Druckformzylinder seilenweise auf den Druckformzylinder übertragen.From EP-A-0 368 180 a process for imaging a printing forme cylinder is known in which a picture-adequate substance application is carried out on the blanket cylinder of a rotary printing press by the image-adequate substance is dissolved out of a thermal transfer film with suitable agents. This substance is transferred in ropes to the plate cylinder when the impression cylinder is turned on and when the impression cylinder is turned on.
Aus der Druckschrift DE 195 08 843 A1 ist ein Verfahren zur Bebilderung bzw. zur Bebilderung und Neutralisation einer Druckplatte eines Druckformzylinders einer Druckmaschine bekannt. Hierbei liegen die auf die Druckplatte aufzubringenden Druckbildinformationen in digitaler Form vor. Zur Verwendung der Druckplatte in der Druckmaschine wird ein die Druckbildinformationen tragendes Medium auf die Druckplatte aufgebracht und nach dem Druckprozess wieder abgelöst.From the document DE 195 08 843 A1 a method for imaging or for imaging and neutralization of a printing plate of a printing forme cylinder of a printing press is known. In this case, the printed image information to be applied to the printing plate is available in digital form. To use the printing plate in the printing press, a medium carrying the print image information is applied to the printing plate and released again after the printing process.
Die Einrichtung zur Druckplattenbebilderung enthält gegebenenfalls eine integrierte Aushärteeinrichtung und eine Ablöseeinrichtung. Die Aushärtung des auf die Druckplatte aufgebrachten Mediums erfolgt mittels UV-Härtung oder Strahlenhärtung.The printing plate imaging device optionally includes an integrated curing device and a release device. The curing of the medium applied to the printing plate by means of UV curing or radiation curing.
Nachteilig an dieser Lösung ist, dass der Einbauraum für die Einrichtung zum Aufbringen des Mediums stark beschränkt ist.A disadvantage of this solution is that the installation space for the device for applying the medium is severely limited.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, ein Verfahren und eine Einrichtung zu schaffen, die in der Druckmaschine eine schnelle und ohne gro-βen Aufwand zu bewerkstelligende Beschichtung der Druckformen oder des Druckformzylinders in der Druckmaschine ermöglichen.Based on this prior art, it is an object of the invention to provide a method and a device that allow in the printing press a quick and without great-βen effort to bewerkstelligende coating of the printing plates or the plate cylinder in the printing press.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des 1. und des 7. Anspruchs gelöst.According to the invention the object is achieved by the features of the first and the seventh claim.
Durch die Realisierung der Erfindung ergeben sich günstige Platzverhältnisse für die Unterbringung der betreffenden Einrichtungen.The realization of the invention provides favorable space for the accommodation of the institutions concerned.
Anhand eines Ausführungsbeispieles soll die Erfindung nachfolgend näher erläutert werden.Reference to an exemplary embodiment, the invention will be explained in more detail below.
Die dazugehörige Zeichnung zeigt ein Druckwerk 1 einer Mehrfarben-Bogenoffsetrotations-druckmaschine. Jedes Druckwerk 1 enthält als bogenführende Zylinder einen Gegendruckzylinder 2 und einen Übergabezylinder 3 und als druckbildübertragende Zylinder einen Druckformzylinder 4 und einen Gummizylinder 5. Der Gummizylinder 5 ist vom Gegendruckzylinder 2 und/oder vom Druckformzylinder 4 abstellbar.The accompanying drawing shows a printing unit 1 a multicolour Bogenoffsetrotations printing machine. Each
Jedem Druckformzylinder 4 ist ein Farbwerk 6 und ein Feuchtwerk 7 zugeordnet. Diese sind mit hier nicht dargestellten Einrichtungen ausgestattet, die deren Abheben vom Druckformzylinder 4 möglich machen. Auf dem Druckformzylinder 4 kann auch eine (hier nicht dargestellte Druckform) aufgespannt sein.Each
Dem Druckformzylinder 4 ist weiterhin eine Bebilderungseinrichtung 9 zugeordnet. Die Bebilderungseinrichtung 9 zur Bebilderung des Druckformzylinders 4 ist als eine Lasereinrichtung ausgeführt, die die bildtragenden Elemente aushärtet. Nach einem anderen Verfahren kann auch ein Ablations-Einrichtung auf Laser-Basis angewendet werden.The
Dem Gummizylinder 5 sind eine Beschichtungseinrichtung 8 und eine Wascheinrichtung 10 zugeordnet. Die Beschichtungseinrichtung 8 ist hier als ein Kammerrakel ausgebildet. Darüber hinaus ist auch der Einsatz von Sprüheinrichtungen und Streicheinrichtungen zum Aufbringen der Schicht möglich. Die Wascheinrichtung 10 kann verfahrbar ausgeführt sein, so dass diese neben der Reinigung des Gummizylinders 5 auch für die Reinigung des Druckformzylinders 4 einsetzbar ist.The
Bei abgestelltem Gegendruckzylinder 2 und abgestelltem Farb- und Feuchtwerk 6; 7 wird durch die Beschichtungseinrichtung 8 ein Medium auf die Oberfläche des Gummizylinders 5 aufgebracht. Das erfolgt durch ein Kammerrakel oder andere geeignete Einrichtungen. Da der Gummizylinder 5 mit dem Druckformzylinder 4 in Kontakt steht, wird dieses Medium auf diesen übertragen und dort eine bebilderbare Beschichtung aufgebaut. Während des Beschichtungsvorgangs wird für die Drehzahl des Gummizylinders 5 und des Druckformzylinders 4 ein Wert gewählt, der von den rheologischen Eigenschaften des Beschichtungs-Materials abhängig ist.When the
Ist die für die Bebilderung erforderliche Schichtstärke erreicht, wird der Kontakt zwischen dem Gummizylinder 5 und dem Druckformzylinder 4 aufgehoben. Die Bebilderung kann nun durchgeführt werden. Das kann je nach Beschichtungsmaterial und Beschichtungsverfahren auf unterschiedliche Art und Weise erfolgen.If the layer thickness required for imaging is reached, the contact between the
In der bevorzugten Variante wird das Medium durch den Laser der Bebilderungseinrichtung 9 an den die Bildinformation tragenden Stellen ausgehärtet, so dass druckende oder nichtdruckende Stellen an der Oberfläche des Druckformzylinders 4 bzw. an der Oberfläche der Druckform entstehen.In the preferred variant, the medium is cured by the laser of the
In einer anderen Variante ist das Medium für die Beschichtung selbsthärtend. Ist die Aushärtung des Mediums nicht selbsttätig möglich, kann parallel zur Beschichtung die Aushärtung über UV-Licht (Polymerisation) oder über eine Laserstrahltrocknung und Einbrennen erfolgen. Nach einer anderen Variante ist es auch möglich, das Medium zu erhitzen, auf den Druckformzylinder 4 aufzubringen und die Verfestigung durch Kühlung zu erreichen. Der nach dem Aufbringen des Mediums derart präparierte Druckformzylinder 4 kann nunmehr durch die Bebilderungseinrichtung 9 nach dem Ablationsverfahren bebildert werden. Im Ergebnis des Bebilderungsprozesses wird die Oberfläche der Schicht mit einer Bildinformation beaufschlagt, so dass druckende und nichtdruckende Stellen entstehen. Je nachdem, ob die Schicht farbfreundlich oder feuchtmittelfreundlich ist, führt die Ablation der Schicht zu druckenden oder nichtdruckenden Stellen auf der Oberfläche des Druckformzylinders 4.In another variant, the medium for the coating is self-curing. If the curing of the medium is not possible automatically, the curing can take place parallel to the coating via UV light (polymerization) or via laser beam drying and baking. According to another variant, it is also possible to heat the medium, applied to the
Während und/oder nach der Bebilderung wird das auf der Oberfläche des Gummizylinders 5 verbleibende Beschichtungsmaterial abgewaschen oder abgerakelt. Bevorzugt wird dabei eine Wascheinrichtung 10 verwendet, deren Position verfahrbar ist. Dadurch kann nach dem Abwaschen des Beschichtungsmaterials vom Gummizylinder 5 auch das auf dem Druckformzylinder 4 bzw. auf der Druckform durch die Bebilderungseinrichtung 9 nicht ausgehärtete Material abgewaschen werden.During and / or after the imaging, the coating material remaining on the surface of the
In einer anderen Variante wird der Kontakt zwischen dem Gummizylinder 5 und dem Druckformzylinder 4 nach dem Erreichen der erforderlichen Schichtstärke nicht unterbrochen. Während der Bebilderung wird durch die Wascheinrichtung 10 gleichzeitig das Material vom Gummizylinder 5 und vom Druckformzylinder 4 abgewaschen.In another variant, the contact between the
- 11
- Druckwerkprinting unit
- 22
- GegendruckzylinderImpression cylinder
- 33
- ÜbergabezylinderTransfer cylinder
- 44
- DruckformzylinderPlate cylinder
- 55
- Gummizylinderrubber cylinder
- 66
- Farbwerkinking
- 77
- Feuchtwerkdampening
- 88th
- Beschichtungseinrichtungcoater
- 99
- Bebilderungseinrichtungimaging
- 1010
- Wascheinrichtungwash
Claims (11)
- Method in printing machines for application of coatings on which an image can be produced, wherein the printing machine is equipped with a counter-pressure cylinder (2), a rubber blanket cylinder (5) and a printing forme cylinder (4) co-operating with an inking mechanism (6) and optionally with a moistening mechanism (7), and when the inking or moistening mechanism is set away, the coating on which an image can be produced is applied, to the surface of the printing forme cylinder (4) or the surface of a printing forme clamped on the printing forme cylinder (4), characterised in that the rubber blanket cylinder (5) is set away from the counter-pressure cylinder (2) and the coating material is applied to the rubber blanket cylinder (5) by a coating device (8) and transferred to the printing forme cylinder (4) by way of the rubber blanket cylinder (5).
- Method in printing machines for application of coatings, on which an image can be produced, according to claim 1, characterised in that a doctor blade system is used for application of the coating to the rubber blanket cylinder (5).
- Method in printing machines for application of coatings, on which an image can be produced, according to claim 1, characterised in that the coating is sprayed onto the rubber blanket cylinder (5).
- Method in printing machines for application of coatings, on which an image can be produced, according to claims 1 to 3, characterised in that for the purpose of transfer of the coating from the rubber blanket cylinder (5) to the printing forme cylinder (4) the two cylinders (4; 5) disposed in contact with one another are operated at a rotational speed adapted to the rheological characteristics of the coating material.
- Method in printing machines for application of coatings, on which an image can be produced, according to claim 1 or 4, characterised in that after transfer of the coating material to the printing forme cylinder (4) the operative connection between rubber blanket cylinder (5) and printing forme cylinder (4) is interrupted and the coating material remaining on the rubber blanket cylinder (5) is removed.
- Method in printing machines for application of coatings, on which an image can be produced, according to claim 1 or 5, characterised in that the removal of the coating material not transferred to the printing forme cylinder (4) is carried out by a doctor and/or by a washing device (10).
- Equipment in printing machines for application of coatings on which an image can be produced, wherein the printing machine consists of a counter-pressure cylinder (2), a rubber blanket cylinder (5), a printing forme cylinder (4) co-operating with an inking mechanism pivotable away from the printing forme cylinder (4) and optionally with a moistening mechanism similarly pivotable away, and a coating device (8) for application of the coating on which an image can be produced, wherein the coating on which an image can be produced can be applied to the surface of the printing forme cylinder (4) itself or to the surface of a printing forme able to be clamped on the printing forme cylinder (4) and a device for setting the rubber blanket cylinder (5) away from the counter-pressure cylinder (2) and/or from the printing forme cylinder (4) is provided, characterised in that the coating device (8) is associated with the rubber blanket cylinder (5).
- Equipment in printing machines for application of coatings, on which an image can be produced, according to claim 7, characterised in that a doctor blade system is provided for application of the coating material to the rubber blanket cylinder (5).
- Equipment in printing machines for application of coatings, on which an image can be produced, according to claim 7, characterised in that a spray device is provided for application of the coating material to the rubber blanket cylinder (5).
- Equipment in printing machines for application of coatings, on which an image can be produced, according to claim 7, characterised in that a device for removal of the coating material remaining on the rubber blanket cylinder (5) is adjustable against the rubber blanket cylinder (5).
- Equipment in printing machines for application of coatings, on which an image can be produced, according to claims 8 and 10, characterised in that the device for removal of the coating material remaining on the rubber blanket cylinder (5) is executed as a doctor and/or as a washing device (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10030599A DE10030599A1 (en) | 2000-06-21 | 2000-06-21 | Method and device in printing machines for applying imageable layers |
| DE10030599 | 2000-06-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1167024A1 EP1167024A1 (en) | 2002-01-02 |
| EP1167024B1 true EP1167024B1 (en) | 2006-08-09 |
Family
ID=7646524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01114001A Expired - Lifetime EP1167024B1 (en) | 2000-06-21 | 2001-06-08 | Method and means for applying imageable coatings in printing machines |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1167024B1 (en) |
| AT (1) | ATE335605T1 (en) |
| DE (2) | DE10030599A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3837978A1 (en) * | 1988-11-09 | 1990-05-10 | Roland Man Druckmasch | METHOD FOR IMAGING A PRINT FORM CYLINDER |
| EP0940252A1 (en) * | 1998-03-03 | 1999-09-08 | Agfa-Gevaert N.V. | Rotary printing press with an integrated image-setter comprising a hollow transparent cylinder as exposure drum |
-
2000
- 2000-06-21 DE DE10030599A patent/DE10030599A1/en not_active Withdrawn
-
2001
- 2001-06-08 AT AT01114001T patent/ATE335605T1/en not_active IP Right Cessation
- 2001-06-08 DE DE50110665T patent/DE50110665D1/en not_active Expired - Lifetime
- 2001-06-08 EP EP01114001A patent/EP1167024B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1167024A1 (en) | 2002-01-02 |
| ATE335605T1 (en) | 2006-09-15 |
| DE10030599A1 (en) | 2002-01-03 |
| DE50110665D1 (en) | 2006-09-21 |
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