WO2015014995A2 - Farbwerk - Google Patents
Farbwerk Download PDFInfo
- Publication number
- WO2015014995A2 WO2015014995A2 PCT/EP2014/066624 EP2014066624W WO2015014995A2 WO 2015014995 A2 WO2015014995 A2 WO 2015014995A2 EP 2014066624 W EP2014066624 W EP 2014066624W WO 2015014995 A2 WO2015014995 A2 WO 2015014995A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- nozzle head
- inking unit
- relative movement
- dispensing
- Prior art date
Links
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
- B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/28—Spray apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/061—Inking devices
Definitions
- the invention relates to an inking unit and a method for the controlled transfer of a liquid, in particular printing ink, varnish, liquid toner or adhesive.
- a preferred use of the inking unit according to the invention and the method according to the invention is the use in a gravure inking unit.
- various inking units or inking unit types are known.
- the printing cylinder or format cylinder immersed in the ink, which is located in the ink tray.
- the impression cylinder cups are completely flooded in the ink tray.
- a squeegee removes the excess ink, so that ink is only in the wells and the webs are colorless.
- Another variant of a gravure inking unit is to run a scoop with a soft cover in the paint tray to prevent excessive foaming and splashing of the paint in the paint tray.
- a special feature of industrial gravure printing is that per color separation a complete form cylinder (and no pressure plate) is used. This results in different diameters of the forme cylinder different print jobs, which must, however, each take in the same color tray color. This in turn creates the problem that different flow conditions prevail in the ink tray at different print jobs, which can affect different print qualities.
- the object of the invention is therefore to provide a gravure inking unit with consistent print quality as possible regardless of the different diameters of the forme cylinder.
- the inking unit according to the invention is an inking unit for the controlled transfer of a liquid, in particular printing ink, varnish, liquid toner or adhesive, with a dispensing surface having recesses for the metered dispensing of the liquid, with a nozzle head for filling the recesses with the liquid, with a drive, which causes a relative movement between the nozzle head and the dispensing surface, with a liquid transfer station, which is connected downstream of the nozzle head in the direction of relative movement and in which the liquid from the wells is at least partially transferable to a receiving surface.
- a gravure inking unit can be operated particularly advantageously with the inking unit according to the invention.
- the method according to the invention is a method for the controlled transfer of a liquid, in particular printing ink, lacquer, liquid toner or adhesive, in which in a first method step a nozzle head via a dispensing surface, the wells to the metered Dispensing of the liquid is moved to fill the wells with the liquid, and in which in a second process step, the liquid is transferred from the wells at least partially on a receiving surface.
- a gravure inking unit can be operated particularly advantageously with the method steps according to the invention.
- the inking of the forme cylinder takes place with a nozzle head.
- a nozzle head can be designed, for example, as used in the method of slide bead coating, curtain coating or spray coating mentioned in JP 2007-069559 A.
- the specific design of the nozzle head can be carried out, for example, as shown in JP 2005-296797 A or JP 2006- 281 103 A.
- An essential realization of the invention is based on the fact that the employment of the nozzle head can be adapted in a simple manner to the different diameters of the forme cylinder. In this way, consistent print qualities can be ensured without depending on the diameter of the forme cylinder.
- Another advantage of the solution according to the invention is the fact that the width of the coloring can be varied on the donor surface with a nozzle head, which is not possible with a solid ink tray.
- a doctor blade for doctoring excess liquid against the donor surface can be adjusted, wherein the doctor blade downstream of the nozzle head in the direction of relative movement and the liquid transfer station is connected upstream. If, during dyeing through the nozzle head, too much liquid should enter the depressions or the webs, this excess liquid can be doctored off with the doctor blade.
- a nozzle head has proven to be advantageous as a nozzle head, as shown in JP 2006-2 281 103 A.
- the inking process of the forme cylinder is optimized with the nozzle head until just about all wells are filled with an approximately equal liquid level, as this is needed in the downstream liquid transfer station.
- the process parameters to be optimized here are, in particular, the volume flow emerging from the nozzle head, the working distance between the nozzle head and the dispensing surface and the working angle of the nozzle head transversely to the direction of the relative movement.
- the volumetric flow emerging from the nozzle head basically results from the scoop volume of the dispensing surface of the forme cylinder and the feed movement of the relative movement. From these two parameters, the theoretical volume flow can be calculated and adjusted in advance.
- the volume flow emerging from the nozzle head is readjusted accordingly.
- the working distance and the working angle of the nozzle head are optimized so that after coloring by the nozzle head only liquid in the wells, but no excess liquid is more on the webs.
- the optimization of the inking process can also be carried out continuously during the printing process in the same way.
- the printed image can be continuously monitored via a printed image camera and used as a measured variable for the optimization of the corresponding parameters.
- an air flow can be generated beyond the nozzle head at the impact point of the liquid on the emitting surface.
- the liquid between the nozzle head and impact point forms a kind of curtain, it is additionally necessary to differentiate between the side of the nozzle head connected downstream in the direction of the relative movement and the side of the nozzle head upstream in the direction of the relative movement.
- a first air flow can be generated on the side of the nozzle head downstream in the direction of the relative movement
- a second air flow can be generated on the side of the nozzle head which is upstream in the direction of the relative movement.
- the single airflow or even the two airflows can flow rectified or even opposite, and they can clocked or continuously flow, this depending on how the location of the point of impact is to be influenced.
- the nozzle head is formed as a slot nozzle, which extends transversely to the direction of the relative movement over the donor surface, as shown for example in JP 2006- 281 103 A is shown.
- a slot nozzle proves to be particularly advantageous in combination with the air flow control described above, because a slot nozzle forms a characteristic liquid bead between the nozzle and the point of impact, the shape of which can be regulated and stabilized by means of the air flow control. For example, it is possible that the shape of the liquid bead with a Camera automatically observed and fed as a measure of air flow control.
- the slot nozzle In the design of the slot nozzle is to ensure that the transverse distribution of the exiting flow is as homogeneous as possible, so that in fact a uniform liquid bead can form.
- one measure could be, for example, to provide fan-shaped longitudinal channels within the slot nozzle. Through the longitudinal channels cross flows within the slot nozzle and thus also the occurrence of turbulent flows can be largely suppressed.
- Another possibility is to actively control the flow distribution within the slot nozzle so that a homogeneous transverse distribution of the exiting volume flow is supported. For example, each partial volume flow within a longitudinal channel of the slot nozzle could be controlled by valves and / or pumps.
- each partial volume flow within a longitudinal channel of the slot nozzle could also be controlled by variable cross sections, wherein the variable cross sections can be realized by elastic rubber walls, which are pneumatically acted upon.
- a closed control loop for actively controlling the flow distribution within the slot nozzle is also possible, for example by observing the liquid bead at several points transversely to the relative movement with corresponding cameras, and using each individual camera signal as a measurement signal for a specific partial volume flow.
- Fig. 1 shows an inventive inking within a
- FIG. 1 shows an inventive inking unit within a gravure printing machine. Depending on the number of colors to be printed are several such inking, each with a dryer (not shown) arranged one behind the other.
- the printing material 101 passes through the successively arranged inking units without interruption.
- the impression roller 102 is frictionally driven via the forme cylinder 103 upon contact with the printing material 101.
- the printing material 101 can be charged electrostatically shortly before reaching the impression roller 102.
- slot nozzle 104 of the forme cylinder 103 is colored.
- the working distance between slot nozzle 104 and forme cylinder 103 is adjustable in the direction of the axis Y by a control unit.
- the working angle of the slot nozzle for which purpose the slot nozzle is mounted pivotably about the axis Z.
- a squeegee 105 for wiping excess paint may also optionally be provided.
- FIG. 2 shows further details of the inking unit according to the invention according to FIG. 1. Shown are the forme cylinder 103 and the slot nozzle 104 of FIG. 1, which are now identified in FIG. 2 by the reference numerals 203 and 204. For reasons of better representability, the direction of rotation of the forme cylinder 203 with respect to the forme cylinder 103 is also chosen the other way round.
- the slot nozzle 204 is movable along the axis Y and pivotally mounted about the axis Z.
- On the upper side of the slot nozzle are a plurality of attachment piece 205, in the Farbzu thoroughlyschläuche (not shown).
- the total of all Farbzu thoroughlyschläuche supplied ink flow corresponds to the Schöpfvolumenrate, which can be calculated from the Schöpfvolumen and the rotational speed of the forme cylinder 203.
- the ink flow is also individually controlled, depending on the transverse distribution (ie in the Z-axis direction) exiting at the slot nozzle Farbmengenwulstes 201 and 202.
- a characteristic meniscus 202 is formed, which allows a measurement of the transverse distribution.
- a corresponding camera system (not shown) is installed here, which forwards the measurement signals to a control unit for controlling the ink supply hoses.
- Another way to stabilize the meniscus 202 is that on the upstream in the direction of rotation of the forme cylinder 203 side of the slot nozzle 204, an air flow nozzle 206 is installed, which generates a suction air flow in front of the meniscus 202 along the Z-axis. If, for example, the slotted nozzle 204 is displaced along the Y axis to increase the working distance and the meniscus 202 threatens to tear off in the direction of rotation of the forme cylinder 203, this process can also be detected by the camera system and the air flow nozzle 206 can be controlled such that the meniscus 202 is retrieved against the direction of rotation of the forme cylinder 203 and stabilized again.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14747021.5A EP3041681A2 (de) | 2013-08-02 | 2014-08-01 | Tiefdruckfarbwerk mit düsenkopf |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013215264.7 | 2013-08-02 | ||
DE102013215264.7A DE102013215264A1 (de) | 2013-08-02 | 2013-08-02 | Farbwerk |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2015014995A2 true WO2015014995A2 (de) | 2015-02-05 |
WO2015014995A3 WO2015014995A3 (de) | 2015-06-11 |
Family
ID=51263400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/066624 WO2015014995A2 (de) | 2013-08-02 | 2014-08-01 | Farbwerk |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3041681A2 (de) |
DE (1) | DE102013215264A1 (de) |
WO (1) | WO2015014995A2 (de) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE634610C (de) * | 1936-08-31 | Koenig & Bauer Schnellpressfab | Farbwerk fuer Rotationstiefdruckmaschinen | |
DE2119542A1 (de) * | 1971-04-22 | 1972-11-09 | Burda Farben Kg, 7600 Offenburg | Einfärbeinrichtung für Rotationstiefdruck |
CH532429A (de) * | 1972-03-17 | 1973-01-15 | Singeisen Markus | Einrichtung, insbesondere Farbwerk, zum Auftragen einer Flüssigkeit auf eine rotierende Walze |
DE2951651C2 (de) * | 1979-12-21 | 1983-10-20 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Vorrichtung zum dosierten Aufbringen von Farbe mittels von Pumpen versorgter Farbdüsen auf die Farbauftragwalzen eines Farbwerks |
EP1531044A1 (de) * | 2003-11-14 | 2005-05-18 | Fischer & Krecke Gmbh & Co. | Einfärbevorrichtung für Tiefdruckzylinder |
JP2005296797A (ja) | 2004-04-12 | 2005-10-27 | Mitsubishi Heavy Ind Ltd | 塗工ヘッダとそれを備えた薄膜形成装置および反転印刷装置 |
JP2006281103A (ja) | 2005-03-31 | 2006-10-19 | Toppan Printing Co Ltd | インク供給装置とパターン形成方法、パターン形成装置、カラーフィルタ形成方法、カラーフィルタ形成装置 |
JP2007069559A (ja) | 2005-09-09 | 2007-03-22 | Konica Minolta Holdings Inc | 塗布装置及び塗布方法 |
DE202012008272U1 (de) * | 2011-09-12 | 2012-12-13 | Itw Dynatec Gmbh | Vorrichtung zum Aufbringen eines Fluids |
-
2013
- 2013-08-02 DE DE102013215264.7A patent/DE102013215264A1/de not_active Ceased
-
2014
- 2014-08-01 EP EP14747021.5A patent/EP3041681A2/de not_active Withdrawn
- 2014-08-01 WO PCT/EP2014/066624 patent/WO2015014995A2/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3041681A2 (de) | 2016-07-13 |
WO2015014995A3 (de) | 2015-06-11 |
DE102013215264A1 (de) | 2015-02-05 |
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