EP1661700A1 - Unité d'encrage d'une machine d'impression et méthode d'utilisation de cette unité d'encrage - Google Patents

Unité d'encrage d'une machine d'impression et méthode d'utilisation de cette unité d'encrage Download PDF

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Publication number
EP1661700A1
EP1661700A1 EP05024357A EP05024357A EP1661700A1 EP 1661700 A1 EP1661700 A1 EP 1661700A1 EP 05024357 A EP05024357 A EP 05024357A EP 05024357 A EP05024357 A EP 05024357A EP 1661700 A1 EP1661700 A1 EP 1661700A1
Authority
EP
European Patent Office
Prior art keywords
roller
inking unit
ductor
inking
lifting
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.)
Withdrawn
Application number
EP05024357A
Other languages
German (de)
English (en)
Inventor
Peter Dipl.-Ing. Hummel
Robert Dipl.-Ing. Ortner
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.)
Manroland AG
Original Assignee
MAN Roland 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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1661700A1 publication Critical patent/EP1661700A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/14—Applications of messenger or other moving transfer rollers

Definitions

  • the invention relates to an inking unit of a printing press, in particular offset printing machine, with a ductor roller, a distributor roller and a lifting wad.
  • Ink units of the type mentioned are known from DE 198 01 623.
  • An inking roller associated with the ink fountain of the inking unit cooperates with a pendulum mounted squeegee roller, which receives ink from the ductor roller and transmits in the course of their pendulum motion on a distributor roller.
  • a constant source of interference for a high print quality are the occurring torque surges, which occur on the other hand by speed differences between the vibrating roller on the one hand and the ductor roller or distributor roller.
  • short inking this problem occurs particularly clearly, since due to a reduced number of inking rollers a Farbetzdickenreduzi für comparison is limited to correspondingly few rolls.
  • the elimination of inking rollers also reduces the number of cleavage sites for the color, so that the taking place by means of the squeegee ink dosing requires correspondingly thin ink layer thicknesses.
  • the invention has for its object to provide an inking unit of a printing press, in particular offset printing machine, with the highest print quality can be provided.
  • the invention is also intended for short inking units be used, which are particularly fast reaction and are preferably operated at a very high machine speed.
  • the squeegee roller is arranged in constant rotational contact with the distributor roller and that a clocking interaction of the squeegee and ductor roller enabling, a color transfer serving displacement device is provided. Since the squeegee roller is constantly in contact with the distributor roller and consequently the squeegee roller peripheral speed corresponds to the distributor roller peripheral speed, there are no speed differences, so that torque shocks which negatively affect the print quality are eliminated. Due to the constant contact of the squeegee roller with the distributor roller, the squeegee roller is driven at machine speed. In order to carry out a temporary, timed ink transfer from the ductor roller to the lifting roller, the displacement device makes a corresponding roller displacement. The displacement device allows a temporary interaction of the squeegee roller and the ductor roller in order to meter out the ink transfer (siphon strip).
  • the displacement device is a pendulum bearing device, i. the displacement movement of the lifting roller corresponds to a pendulum motion.
  • the pendulum bearing device is mounted pivotably about the axis of rotation of the distributor roller.
  • the pendulum movement of the lifting roller thus takes place about the axis of rotation of the distributor roller, so that during the pendulum movement of the lifting roller, the relative position of the axes of rotation of the lifting roller and distributor roller is not changed. This allows the squeegee to remain in constant contact with the distributor roller and still make its pendulum movements to cooperate with the ductor roller.
  • a stop device for forming a gap between the lateral surface of the ductor roller and the lateral surface of the lifting roller is provided in the position of their closest approach.
  • the lateral surfaces of the squeegee roller and ductor roller do not touch each other in the temporary transfer of color, but only such a close approach that a color layer present on the ductor roller is transferred to the siphon roller (siphon strip) in a layer thickness dependent on the size of the gap.
  • this avoids torque surges between the relatively slow-running ductor roller and the faster rotating vibrator roller and, on the other hand, permits metering with relatively thin ink layer thicknesses, which is advantageous, in particular, in the case of fast-reacting short inking units.
  • a development of the invention provides that the stop device is designed to adjust the size of the gap as an adjustable stop device.
  • the amount of ink transferred from the fountain roller to the squeegee roller can be varied by adjusting the gap size. An adaptation to the existing boundary conditions and the desired print quality is therefore easily possible.
  • the stop means may be formed as running on the ductor roller role.
  • the pendulum bearing device is preferably biased by means of a spring device in the direction of the ductor roller, so that the stopper is acted upon by the spring force of the spring device and there are always constant Walzenan organizationsrungs- and -entfernungs disagree.
  • the invention can be realized in conventional inking units, but also in shortened inking units with a reduced number of ink rollers and a correspondingly smaller number of nips.
  • the invention further relates to a method for operating an inking unit of a printing machine, in particular offset printing machine, with a ductor roller, a distributor roller and a squeegee roller, wherein the squeegee roller is operated at a Heberwalzenorgs biology which is as large as the Reiberwalzenstructures economically the distributor roller, wherein the squeegee roller and distributor roller be operated in constant rotational contact with each other and the squeegee roller and the ductor roll temporarily interact for color transmission. Accordingly, ratios between the distributor roller and the squeegee roller are the same as in a film inking unit.
  • the squeegee roller and ductor roller the conditions of a squeegee unit.
  • the squeegee roller in the position of its closest approach to the ductor roller to the ductor roller maintains a distance which is smaller than the thickness of the ink layer on the ductor roller, no Heberoeuvre take place, since there is no mechanical contact in the color transfer. This is particularly advantageous for a slowly rotating ductor roller and a fast-rotating lifter roller (slip lifter).
  • the lifter stroke of the lifting roller is at a rate of one full revolution of a plate cylinder of the printing press in a ratio of 1: 1 or approximately 1: 1. Since the squeegee roller is in constant contact with the distributor roller, there are only relatively few siphoning movements, which make it possible to drive a very fast siphon stroke. While conventional inking units have a lifting stroke of 1: 3, that is, a reciprocating motion of the lifter during the time in which the plate cylinder of the printing press has performed three full revolutions, this ratio can be shortened to 1: 1 in the subject invention become.
  • the ductor roller is driven separately, so it is not operated with the main drive of the printing press.
  • the speed of the ductor roller can be controlled or regulated to keep it at a certain level or to adapt to changing conditions.
  • the lift strip formed in the ink transfer is preferably kept constant or approximately constant at machine speed changes of the printing press.
  • the distributor rollers and the squeegee roller are preferably driven at the machine speed of the printing press.
  • the drawing illustrates the invention with reference to an embodiment in which the figure shows a schematic side view of the inking unit designed as an offset printing press.
  • the figure essentially shows an inking unit 1 of a printing machine, which is designed as an offset printing press.
  • a ductor roller 2 interacts with a paint box 3, in which color 4 is located.
  • the ink fountain 3 has zonal doctor blade for a zonal ink film dosing.
  • the ductor roller 2 has a separate drive, not shown, that is, it is not driven by the main drive of the printing press.
  • the inking unit 1 further has a distributor roller 5, which cooperates with a plurality of inking rollers 6, some of which are engageable with a plate cylinder 7 of the printing press to transfer color 4 to a pressure plate there spanned.
  • the distributor roller 5, like the cooperating with her other inking rollers 6, the peripheral speed of the plate cylinder 7 at.
  • the inking roller referred to as the distributor roller 5 can also be designed as an inking roller without Verreibungsantrieb. In this case, however, it is still driven at circumferential speed of the plate cylinder 7.
  • a lifting roller 8 is arranged, which serves the temporary, clocked color transport from the ductor roller 2 to the distributor roller 5.
  • the lifting roller 8 is arranged on a displacement device 9, which is designed as a pendulum bearing device 10. It has the two end regions of the lifting roller 8 associated, two-armed lift lever 11, the axes of rotation 12 coincide with the axis of rotation 13 of the distributor roller 5.
  • the lifter roller 8 is rotatably supported between the respective rectified arms of the lifter lever 11 about the axis of rotation 14. Between the lateral surface of the lifting roller 8 and lateral surface of the distributor roller 5 is a constant rotary contact.
  • the surface of the squeegee roller 8 is made of non-deformable material, for example of steel or Rilsan; the surface of the distributor roller 5 is deformable, that is designed to be elastic. It consists for example of rubber.
  • the lifting roller 8 is driven at the machine speed of the printing press.
  • the drive of the displacement device 9 can be done in different ways.
  • a cam roller 15 is provided on at least one of the other, the storage of the lifting roller 8 opposite arms of the lifter lever 11, which runs on a respective cam gear 16.
  • the cam gear 16 may be arranged on one side.
  • the lifter levers 11 by means of a rigid connecting them Axis pivotally mounted within the distributor roller 5.
  • a cam mechanism 16 may be provided for driving the lifting roller 8.
  • a cam roller 15 is arranged on each of the lift lever 11, which cooperates with the corresponding cam gear 16. In this case, the complex storage of the lifting lever 11 connecting axis can be avoided within the distributor roller 5.
  • the arms of the lifter levers 11 which support the lifter roller 8 are each provided with a roller 17, each having an eccentric bearing 18.
  • the eccentric 18 allow a position adjustment of the rollers 17 relative to the axis of rotation 14 of the squeegee. 8
  • the cam gears 16 are driven at machine speed.
  • the pendulum bearing device 10 is biased by means of a spring device 19 in the direction of the ductor roller 2 (arrow 20), whereby the cam rollers 15 are pressed against the cam gear 16.
  • the pendulum bearing device 10 In operation of the printing press 1 is the pendulum bearing device 10 around the rotation axis 12 by running the cam rollers 15 on the or the cam gear / -n 16 periodically back and forth, causing the squeegee 8 clocking the ductor roller 2 approaches and back from this removed.
  • the rollers 17 contact the mantle surface of the ductor roller 2, the positions of the rollers 17 being adjusted relative to the mantle surface of the squeegee roller 8 such that between squeegee 8 and ductor roller 2 in the state of their closest approach a gap s remains.
  • this gap can be set to a value of, for example, 0.003 mm.
  • the invention it is possible to achieve excellent printing qualities, especially in short inking units. Since there are only a few cleavage points in a short inking unit, a thinly metered ink layer thickness can already be achieved on the squeegee roller 8 with the squeegee assembly according to the invention.
  • the width of the FarbheberstMails is adjusted by means of control or regulation of the speed of the ductor roller 2. Only that ink layer thickness range on the ductor roller 2 which is larger than the size of the gap s between the ductor roller 2 and the lifter roller 8 is transmitted. Since no mechanical contact takes place in the ink transfer between the slowly rotating ductor roller 2 and the rapidly rotating lifting roller 8, there are no lifters.
  • the lifting movement of the lifting roller 8 from the ductor roller 2 is preferably about 0.2 mm. Because of this only very small way, which is realized by means of the cam roller / -n 15 and the or the Kurvengetriebe / -s 16, is only a very low lift displacement is required, which allows a correspondingly fast lift stroke, which may have a ratio of 1: 1 to a revolution of the plate cylinder 7 of the printing press.
  • two cam rollers 15 and a cam gear 16 are preferably provided with two cams in each driven lift lever 11, wherein the cams of the cam gear 16 phase shift relative to each other are to bring about a corresponding change in movement of the pendulum bearing device 10. Since the squeegee roller 8 - compared to the prior art - no longer moves clockwise to the distributor roller 5, but there is a permanent rotary contact, eliminating the time necessary for the movement and is available for color transport available, whereby a very uniform coloration can be realized , If the color transport is interrupted, the pendulum movement of the lifting roller 8 can be stopped by fixing the pendulum bearing device 10. For this purpose, for example, a pawl (not shown) is provided.
  • the object of the invention is not limited to the apparent from the figure inking or a short inking unit, but can be applied to any inking.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP05024357A 2004-11-26 2005-11-09 Unité d'encrage d'une machine d'impression et méthode d'utilisation de cette unité d'encrage Withdrawn EP1661700A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410057142 DE102004057142A1 (de) 2004-11-26 2004-11-26 Farbwerk einer Druckmaschine sowie Verfahren zum Betrieb eines Farbwerks

Publications (1)

Publication Number Publication Date
EP1661700A1 true EP1661700A1 (fr) 2006-05-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05024357A Withdrawn EP1661700A1 (fr) 2004-11-26 2005-11-09 Unité d'encrage d'une machine d'impression et méthode d'utilisation de cette unité d'encrage

Country Status (3)

Country Link
EP (1) EP1661700A1 (fr)
JP (1) JP2006150941A (fr)
DE (1) DE102004057142A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078283B4 (de) 2011-06-29 2015-01-22 Koenig & Bauer Aktiengesellschaft Rotationsdruckmaschine mit einem Formzylinder und einem an diesen Formzylinder angestellten Farbwerk
DE102016209967B3 (de) * 2016-06-07 2016-09-29 Koenig & Bauer Ag Verfahren zum Betrieb eines Werkes für eine Bogenverarbeitungsmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1981912A (en) * 1932-03-10 1934-11-27 Goss Printing Press Co Ltd Printing press
US4033262A (en) * 1976-03-18 1977-07-05 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Ink applicator for printing apparatus
US4148256A (en) * 1977-01-28 1979-04-10 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Inking system for lithographic offset printing machines
DE3541270A1 (de) * 1985-01-21 1986-07-24 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Farbheberantrieb fuer druckmaschinen
DE19801623A1 (de) 1998-01-17 1999-07-29 Roland Man Druckmasch Verfahren zum Betrieb einer Offset-Rotationsdruckmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1981912A (en) * 1932-03-10 1934-11-27 Goss Printing Press Co Ltd Printing press
US4033262A (en) * 1976-03-18 1977-07-05 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Ink applicator for printing apparatus
US4148256A (en) * 1977-01-28 1979-04-10 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Inking system for lithographic offset printing machines
DE3541270A1 (de) * 1985-01-21 1986-07-24 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Farbheberantrieb fuer druckmaschinen
DE19801623A1 (de) 1998-01-17 1999-07-29 Roland Man Druckmasch Verfahren zum Betrieb einer Offset-Rotationsdruckmaschine

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Publication number Publication date
JP2006150941A (ja) 2006-06-15
DE102004057142A1 (de) 2006-06-08

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