EP1502740B1 - Suction device in an inking unit - Google Patents

Suction device in an inking unit Download PDF

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Publication number
EP1502740B1
EP1502740B1 EP04014676A EP04014676A EP1502740B1 EP 1502740 B1 EP1502740 B1 EP 1502740B1 EP 04014676 A EP04014676 A EP 04014676A EP 04014676 A EP04014676 A EP 04014676A EP 1502740 B1 EP1502740 B1 EP 1502740B1
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EP
European Patent Office
Prior art keywords
unit
inking unit
inking
suction
roller
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
Application number
EP04014676A
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German (de)
French (fr)
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EP1502740A2 (en
EP1502740A3 (en
Inventor
Andreas Dipl.-Ing. Ihme
Hans-Bernd Jäger
Guido Dipl.-Ing. Reschke
Jürgen Dipl.-Ing. Schölzig
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Manroland AG
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Manroland AG
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Publication date
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Publication of EP1502740A2 publication Critical patent/EP1502740A2/en
Publication of EP1502740A3 publication Critical patent/EP1502740A3/en
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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
    • B41F31/001—Ink mist preventing means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator

Definitions

  • the invention relates to a device for Farbwerksabsaugung according to the preamble of claim 1.
  • the ink to be printed is applied to the printing plate mounted on a forme cylinder by an ink fountain, an ink fountain roller cooperating with the ink fountain, downstream inking rollers and inking rollers.
  • the plurality of gaps between the individual inking rollers serves to produce the required layer thickness of the ink for the order on the printing form.
  • paint mist or paint splashes that pollute the machine parts of the environment, dry and thus can only be removed with a high handling effort.
  • suction devices which suck the air within the inking unit with the color particles contained therein.
  • a device is for example from the DE 196 17 194 C2 known.
  • the disadvantage of such a device is that it builds relatively expensive and thus the accessibility is limited to printing unit parts.
  • a suction device which consists of a series of axial fans, which are mounted in the inking rollers covering protection.
  • the fans arranged extending in a row over the format width of the machine are assigned a filter element by which the air is drawn in from the interior of the inking unit space. This avoids that the fans are polluted by the extracted paint mist.
  • paint mist can be effectively extracted only under optimal conditions.
  • a type and quantity of paint mist often arises, which can not be detected effectively with this known device.
  • a method and a system for local aeration which is used on a printing unit of a printing press.
  • the system has a blowing device with nozzles on one side of the printing unit, by means of which a transverse flow along the rollers of the printing unit is produced towards a suction device.
  • the blowing device is to create an air curtain that surrounds the entire printing unit. With the air curtain pollutants are to be transported to the suction and the leakage of pollutants are prevented from the printing press.
  • the blown air which emerges in a sharply focused manner from the nozzles, is picked up by the suction device, which lies opposite the nozzles and, according to the beam propagation, has a larger design.
  • a cover for a printing unit is known.
  • the cover is provided with an air suction device which has at least two separately arranged filters.
  • With the cover a hermetic shielding of the printing unit is intended. Therefore, the cover on a closure cover for the maintenance of the underlying printing unit.
  • Object of the present invention is therefore to extend a suction device for an inking unit according to the preamble of claim 1 such that the efficiency of the suction can be improved in structurally simple manner.
  • the fans of the suction device is associated with a blowing device generating an air flow within the inking unit.
  • the blowing device is designed as one or more axial fans arranged in series, which in particular generate an airflow directed in a certain direction of the inking unit by connecting downstream of air guiding devices.
  • this air flow is directed by the louvers on a roller of the inking unit.
  • the air flow of the blown air device through the louvers in either the radial or tangential direction be directed to a printing ink and dampening roller leading the inking unit.
  • the air flow is directed to a surface area of an inking roller in which an increased proportion of dampening solution in the ink in the inking unit is transported upwards.
  • the device is preferably mounted in protection from the inking rollers. By a compact arrangement, the space between the printing units are not affected.
  • the axial fans of the blowing devices according to the invention are also preceded by filter elements.
  • filter elements This avoids that impurities in the air of the printing room are blown into the inking unit and - especially when blowing a roller surface - is absorbed by the ink on the roll surfaces.
  • the filter elements of the blowing device provided according to the invention are interchangeable, so that they can be easily replaced after receiving a certain amount of dirt.
  • the filter elements upstream of the blower and exhaust fans also prevent interference during operation caused by contamination of the fans.
  • the filter elements are to change without tools and designed as a quick-change filter mat.
  • the filter elements can be designed, for example, as a plastic mat, as a paper or plastic fleece, made of paper material or as a fabric fleece. It is also possible to use a metal grid on which by means of electrical charging the sucked dirt particles are deposited.
  • the filter elements can also be designed as a filter web instead of in the form of a rigid element.
  • the filter web can be guided past the fans by rolling from a supply winding roll and wound up on a take-up roll for soiled material.
  • the filter change is additionally facilitated and can also be automated if the winding rollers are designed to be driven.
  • the fans of the suction device and / or the fans of the blowing device according to the invention are designed individually and / or controllable in groups.
  • the volume flows can be matched exactly to the respective pressure conditions.
  • it can be provided, in particular, to design the setpoint application for the fans as a function of the zonal color guide, i. In zones with a higher amount of ink, higher volume flows are produced in and / or out of the inking unit than in zones with less colorant transport.
  • the target value can be provided depending on the amount of dampening solution in the respective zonal roll area.
  • the fans of the suction device can furthermore be designed to be switchable, such that the effectiveness of the air circulation in the inking unit is assisted with already connected fans of the blowing device. This can take into account that depending on the transported amount of ink for nebulization or spraying of the ink can come.
  • the setting values for the fans of the suction device and / or the blowing device can be stored, so that during repeat jobs or similar print jobs corresponding values can be brought back to setting or default. This eliminates time-consuming adjustments at the beginning of printing.
  • the setting and Sollbetbeaufschlagung the fan of the suction device and / or the blowing device is preferably carried out from the control center of the printing press. There can also be the corresponding storage of executed print jobs.
  • the fans of the suction and / or the blowing device can be switched on even with different operating conditions of the inking unit.
  • the fans of the blowing device can be switched on when a connection is made switchable via at least one roller between the inking unit and the dampening unit. This can be avoided by switched evaporation connection of the inking unit and the dampening unit by means of the device according to the invention that inadvertent dampening solution is transported in the inking unit and in the inking unit from the forme cylinder or the connection to the dampening unit from the top.
  • the fan of the suction device can be switched on to increase the air exchange in the space in front of the inking and to improve the cleaning effect.
  • the invention can be attached to an inking unit of a printing unit or to a coating unit of a printing press. Likewise, the invention in an inking unit without dampening (waterless offset printing) can be used.
  • the invention is advantageously suitable for stabilizing the conditions in the inking unit during the printing process. This is especially true when using UV inks or metal inks that are known to be susceptible to dampening. This prevents dampening solution from being transferred to the printing ink and tends to emulsify it. This deficiency can cover the entire inking unit, so that it is also avoided by the invention that the printing ink does not become liquid and its processability or meterability in Farbdosier Anlagenen is degraded.
  • the color to be printed is applied from an ink fountain 1 via an ink fountain roller 2, the ink fountain roller 2 downstream inking rollers 3 and inking rollers 4 on the pressure plate clamped on the forme cylinder 5.
  • the inking rollers 4 upstream of a dampening roller 6.
  • the dampening roller 6 cooperates with dampening rollers 7 of a dampening unit.
  • a bridge roller 8 the connection of the dampening roller 6 with the first inking roller 4 of the inking unit.
  • the inking rollers 3 of the inking unit are covered by a hinged protection 9.
  • On the protection 9 are on the format width of the Pressing machine extending a series of axial fans 10 arranged, through which air is sucked from the interior of the inking room.
  • the axial fans 10 are assigned in the flow direction upstream filter elements 11. These absorb the impurities or color splashes / the color mist of the air sucked out of the inking unit by the axial fans 10. This avoids that the axial fans 10 themselves are contaminated by the paint splash / paint mist.
  • axial fans 12 are arranged below the row of axial fans 10, which are also assigned upstream filter elements 13 in the flow direction.
  • an air flow in the space of the inking unit can be generated.
  • the air flow is hereby directed by air guide elements 14 against the surface of one of the inking rollers 3.
  • the air guide elements 14 are arranged so that the blast air flow is directed tangentially or radially against the inking roller 3.1.
  • the inking roller 3.1 is particularly suitable for working together with a blowing device according to the invention.
  • the inking roller 3.1 is according to the figure in a single-stranded area of the inking unit, ie in this area, the entire color transport is carried out only from one inking roller to another, while later the compactor divided into two roller strands.
  • the inking roller 3.1 is also arranged in its direction of rotation so that there is an upward movement on the air guide elements 14 of the blowing device facing side of the ink fountain roller 3.1. In this area, therefore, potentially dampening solution in the inking unit is promoted upwards. This can be particularly advantageous prevented or at least minimized at this point the transport of dampening solution in the inking unit so as to prevent mixing of printing ink and dampening solution.
  • the filter elements 11, 13 are preferably made of a nonwoven material made of plastic or paper and very easily removed from the housing elements on the axial fans 10, 12 or exchangeable. To further simplify the exchange, the filter elements 11, 13 may also be designed in the form of a web. Then there is the possibility at a -. the upper - side of the recordings of the axial fan 10 to provide a supply roll of the filter material. The filter web can then be guided through the receptacles of the filter elements and received on the opposite side of the axial fan 12 on a take-up reel. If the filter web is dirty, it only needs to be transported to the take-up reel to the soiled piece, while fresh filter web is brought into the range of axial fans 10, 12. The winding device can be driven and thus remotely operated orsätig adjusting equipped.
  • the axial fan 12 By the guided into the inking unit and in particular radially or tangentially to an inking roller surface air flow of the axial fan 12 results in conjunction with the suction of the inking air through the axial fan 10, an improved removal of paint mist / paint splashes from the interior of the inking unit. This is particularly important when working with different ink layer thicknesses on the inking rollers, which at higher ink layer thicknesses preferably give splashes of color that must be eliminated with increased air circulation.
  • the axial fans 10, 12 can additionally be adjusted both in groups within their assignment to the blowing or suction device or be switchable to account for different distributions of paint mist or paint splashes.
  • connection of the axial fans 10 of the suction device at different production speeds.
  • the misting of ink or the spraying of paint particles often sets in certain known speed ranges.
  • the negative effects of the production speed on the color fog or the spraying of printing ink can thus be countered in an advantageous manner by means of automatic connection of the axial fan 10 of the suction device in the speed ranges mentioned.
  • Another application for this is also a different across the width of the printing unit distribution of dampening solution.
  • an accumulation of fountain solution transverse to the transport direction in the edge region or in the central region of the rollers occur. This can be countered by corresponding group-wise connection of at least axial fans 12 of the blowing device.
  • adjustable axial fan 12 also specifically accumulated moisture from the upper region of the inking unit.
  • This effect in turn can be supported - in reverse view - by independently connecting the axial fan 10 of the suction device.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Abstract

A sheet-fed offset printing machine has rollers within a housing with an air extractor fan (10,11) drawing air through a filter. The extractor fan is esp. located immediately alongside an air intake blower fan (12-14).

Description

Die Erfindung betrifft eine Einrichtung zur Farbwerksabsaugung gemäß dem Oberbegriff von Anspruch 1.The invention relates to a device for Farbwerksabsaugung according to the preamble of claim 1.

Bei Bogenoffsetdruckmaschinen wird die zu verdruckende Farbe von einem Farbkasten, einer mit dem Farbkasten zusammenwirkenden Farbkastenwalze, nachgeordneten Farbwerkwalzen sowie Farbauftragwalzen auf die auf einem Formzylinder aufgespannte Druckform aufgetragen. Die Vielzahl der Spaltstellen zwischen den einzelnen Farbwerkwalzen dient dazu, die erforderliche Schichtdicke der Farbe für den Auftrag auf der Druckform zu erzeugen. Je nach Art und Eigenschaft der Druckfarbe entsteht in jeder Spaltstelle zwischen zwei Farbwerkwalzen Farbnebel bzw. Farbspritzer, welche die Maschinenteile der Umgebung verschmutzen, antrocknen und somit nur noch mit hohem Handhabungsaufwand zu entfernen sind.In sheet-fed offset printing machines, the ink to be printed is applied to the printing plate mounted on a forme cylinder by an ink fountain, an ink fountain roller cooperating with the ink fountain, downstream inking rollers and inking rollers. The plurality of gaps between the individual inking rollers serves to produce the required layer thickness of the ink for the order on the printing form. Depending on the nature and properties of the ink is formed in each nip between two inking rollers paint mist or paint splashes that pollute the machine parts of the environment, dry and thus can only be removed with a high handling effort.

Zur Vermeidung von Verschmutzungen durch Farbnebel bzw. Farbspritzer sind Absaugeinrichtungen bekannt, welche die Luft innerhalb des Farbwerkes mit den darin enthaltenen Farbteilchen absaugen. Eine solche Einrichtung ist beispielsweise aus der DE 196 17 194 C2 bekannt. Nachteilig bei einer derartigen Einrichtung ist aber, dass diese relativ aufwendig baut und dadurch die Zugänglichkeit zu Druckwerksteilen eingeschränkt wird.To prevent contamination by paint mist or paint splashes suction devices are known which suck the air within the inking unit with the color particles contained therein. Such a device is for example from the DE 196 17 194 C2 known. The disadvantage of such a device is that it builds relatively expensive and thus the accessibility is limited to printing unit parts.

Zum Absaugen von Farbnebel/Farbspritzern ist eine Absaugeinrichtung bekannt, welche aus einer Reihe von Axiallüftern besteht, welche in dem die Farbwerkwalzen bedeckenden Schutz angebracht sind. Den sich in einer Reihe über die Formatbreite der Maschine erstreckend angeordneten Lüftern ist ein Filterelement zugeordnet, durch welches die Luft aus dem Inneren des Farbwerkraumes angesaugt wird. So wird vermieden, dass die Lüfter durch den abgesaugten Farbnebel verschmutzt werden.For suction of paint mist / paint splashes a suction device is known, which consists of a series of axial fans, which are mounted in the inking rollers covering protection. The fans arranged extending in a row over the format width of the machine are assigned a filter element by which the air is drawn in from the interior of the inking unit space. This avoids that the fans are polluted by the extracted paint mist.

Mit der bekannten Einrichtung lässt sich Farbnebel nur unter optimalen Bedingungen wirkungsvoll absaugen. Bei bestimmten Druckbedingungen bzw. Druckfarben entsteht aber oft eine Art und Menge von Farbnebel, der mit dieser bekannten Einrichtung nicht wirkungsvoll erfasst werden kann.With the known device, paint mist can be effectively extracted only under optimal conditions. However, under certain pressure conditions or printing inks, a type and quantity of paint mist often arises, which can not be detected effectively with this known device.

Aus der EP-A-0 591 986 ist eine Druckmaschine bekannt, bei der eine Reihe von Lüftern an der Verschutzung des Farbwerks angeordnet ist.From the EP-A-0 591 986 a printing machine is known in which a number of fans is arranged on the protection of the inking unit.

Aus der WO 90/03855 A1 ist ein Verfahren und ein System zur lokalen Belüftung bekannt, das an einem Druckwerk einer Druckmaschine eingesetzt ist. Das System weist eine Blasvorrichtung mit Düsen an einer Seite des Druckwerkes auf, mittels derer eine Querströmung entlang der Walzen des Druckwerkes zu einer Absaugeinrichtung hin erzeugt wird. Die Blasvorrichtung soll einen Luftvorhang, der das gesamte Druckwerk umgibt, erzeugen. Mit dem Luftvorhang sollen Schadstoffe zur Absaugeinrichtung abtransportiert und das Austreten von Schadstoffen aus der Druckmaschine verhindert werden. Die Blasluft, die aus den Düsen scharf gebündelt austritt, wird von der den Düsen gegenüber liegenden, entsprechend der Strahlausbreitung größer gestalteten Absaugeinrichtung aufgenommen.From the WO 90/03855 A1 For example, there is known a method and a system for local aeration, which is used on a printing unit of a printing press. The system has a blowing device with nozzles on one side of the printing unit, by means of which a transverse flow along the rollers of the printing unit is produced towards a suction device. The blowing device is to create an air curtain that surrounds the entire printing unit. With the air curtain pollutants are to be transported to the suction and the leakage of pollutants are prevented from the printing press. The blown air, which emerges in a sharply focused manner from the nozzles, is picked up by the suction device, which lies opposite the nozzles and, according to the beam propagation, has a larger design.

Aus der DE 101 49 843 A1 ist eine Abdeckhaube für ein Druckwerk bekannt. Die Abdeckhaube ist mit einer Luftabsaugeinrichtung versehen, die mindestens zwei getrennt angeordnete Filter aufweist. Mit der Abdeckhaube ist eine hermetische Abschirmung des Druckwerkes beabsichtigt. Daher weist die Abdeckhaube einen Verschlussdeckel zur Wartung des darunter liegenden Druckwerks auf.From the DE 101 49 843 A1 a cover for a printing unit is known. The cover is provided with an air suction device which has at least two separately arranged filters. With the cover a hermetic shielding of the printing unit is intended. Therefore, the cover on a closure cover for the maintenance of the underlying printing unit.

Aufgabe der vorliegenden Erfindung ist es daher, eine Absaugeinrichtung für ein Farbwerk gemäß dem Oberbegriff von Anspruch 1 derartig zu erweitern, so dass in bautechnisch einfacher Weise der Wirkungsgrad der Absaugung verbessert werden kann.Object of the present invention is therefore to extend a suction device for an inking unit according to the preamble of claim 1 such that the efficiency of the suction can be improved in structurally simple manner.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing features of claim 1. Further developments of the invention will become apparent from the dependent claims.

Gemäß der Erfindung ist vorgesehen, dass den Lüftern der Absaugeinrichtung eine einen Luftstrom innerhalb des Farbwerkes erzeugende Blaseinrichtung zugeordnet ist. Erfindungsgemäß ist dabei vorgesehen, dass die Blasvorrichtung als ein oder mehrere in Reihe angeordneter Axiallüfter ausgebildet ist, welche insbesondere durch Nachschaltung von Luftleiteinrichtungen einen in einer bestimmten Richtung des Farbwerkes gerichteten Luftstrom erzeugen. In bevorzugter Weise kann hierbei vorgesehen sein, dass dieser Luftstrom durch die Luftleiteinrichtungen auf eine Walze des Farbwerkes gerichtet ist.
Weiterhin kann der Luftstrom der Blasluftvorrichtung durch die Luftleiteinrichtungen entweder in radialer oder in tangentialer Richtung auf eine Druckfarbe und Feuchtmittel führende Walze des Farbwerkes gerichtet werden.
In bevorzugter Weise wird der Luftstrom auf einen Oberflächenbereich einer Farbwerkswalze gerichtet, in dem ein erhöhter Anteil von Feuchtmittel in der Druckfarbe im Farbwerk nach oben transportiert wird.According to the invention it is provided that the fans of the suction device is associated with a blowing device generating an air flow within the inking unit. According to the invention, it is provided that the blowing device is designed as one or more axial fans arranged in series, which in particular generate an airflow directed in a certain direction of the inking unit by connecting downstream of air guiding devices. In a preferred manner, it may be provided that this air flow is directed by the louvers on a roller of the inking unit.
Furthermore, the air flow of the blown air device through the louvers in either the radial or tangential direction be directed to a printing ink and dampening roller leading the inking unit.
Preferably, the air flow is directed to a surface area of an inking roller in which an increased proportion of dampening solution in the ink in the inking unit is transported upwards.

Die Vorrichtung ist bevorzugt im Schutz vor den Farbwerkswalzen angebracht. Durch eine kompakte Anordnung werden die Platzverhältnisse zwischen den Druckwerken nicht beeinträchtigt.The device is preferably mounted in protection from the inking rollers. By a compact arrangement, the space between the printing units are not affected.

Gemäß einer bevorzugten Weiterbildung der Erfindung sind den Axiallüftern der erfindungsgemäßen Blaseinrichtungen ebenfalls Filterelemente vorgeschaltet. So wird vermieden, dass Verunreinigungen in der Luft des Drucksaales in das Farbwerk eingeblasen werden und - insbesondere beim Anblasen einer Walzenoberfläche - von der Druckfarbe auf den Walzenoberflächen aufgenommen wird. Die Filterelemente der erfindungsgemäß vorgesehenen Blaseinrichtung sind auswechselbar, so dass diese nach Aufnahme einer bestimmten Schmutzmenge in einfacher Weise ausgetauscht werden können. Die den Lüftern der Blas- und Absaugung vorgeschalteten Filterelemente verhindern zudem auch eine durch Verschmutzung der Lüfter hervorgerufene Beeinträchtigung im Betrieb. Vorzugsweise sind die Filterelemente ohne Werkzeug zu wechseln und als schnell austauschbare Filtermatte ausgeführt.
Die Filterelemente können z.B. als Kunststoffmatte, als Papieroder Kunststoffvlies, aus Papiermaterial oder als Stoffvlies ausgeführt sein. Es besteht auch die Möglichkeit ein Metallgitter zu verwenden, an dem mittels elektrischer Aufladung die angesaugten Schmutzpartikel abgeschieden werden.According to a preferred embodiment of the invention, the axial fans of the blowing devices according to the invention are also preceded by filter elements. This avoids that impurities in the air of the printing room are blown into the inking unit and - especially when blowing a roller surface - is absorbed by the ink on the roll surfaces. The filter elements of the blowing device provided according to the invention are interchangeable, so that they can be easily replaced after receiving a certain amount of dirt. In addition, the filter elements upstream of the blower and exhaust fans also prevent interference during operation caused by contamination of the fans. Preferably, the filter elements are to change without tools and designed as a quick-change filter mat.
The filter elements can be designed, for example, as a plastic mat, as a paper or plastic fleece, made of paper material or as a fabric fleece. It is also possible to use a metal grid on which by means of electrical charging the sucked dirt particles are deposited.

Die Filterelemente können anstatt in Form eines starren Elementes auch als Filterbahn ausgeführt sein. Die Filterbahn kann wiederum von einer Vorratswickelrolle abrollend an den Lüftern vorbeigeführt werden und auf einer Aufwickelrolle für verschmutztes Material aufgewickelt werden. Damit wird der Filterwechsel zusätzlich erleichtert und kann zudem automatisiert werden, wenn die Wickelrollen antreibbar ausgeführt sind.The filter elements can also be designed as a filter web instead of in the form of a rigid element. In turn, the filter web can be guided past the fans by rolling from a supply winding roll and wound up on a take-up roll for soiled material. Thus, the filter change is additionally facilitated and can also be automated if the winding rollers are designed to be driven.

Gemäß der Erfindung ist vorgesehen, dass die Lüfter der Absaugeinrichtung und/oder die Lüfter der erfindungsgemäßen Blaseinrichtung einzeln und/oder in Gruppen steuerbar ausgeführt sind. So können die Volumenströme exakt auf die jeweiligen Druckbedingungen abgestimmt werden. Hierbei kann insbesondere vorgesehen sein, die Sollwertbeaufschlagung für die Lüfter in Abhängigkeit mit der zonalen Farbführung zu gestalten, d.h. in Zonen mit einer höheren Farbmenge werden höhere Volumenströme in das Farbwerk herein und/oder aus dem Farbwerk heraus erzeugt als in Zonen mit weniger Farbmengentransport. Ebenso kann die Sollwertbeaufschlagung abhängig von der Menge an Feuchtmittel im jeweiligen zonalen Walzenbereich vorgesehen sein.According to the invention, it is provided that the fans of the suction device and / or the fans of the blowing device according to the invention are designed individually and / or controllable in groups. Thus, the volume flows can be matched exactly to the respective pressure conditions. In this case, it can be provided, in particular, to design the setpoint application for the fans as a function of the zonal color guide, i. In zones with a higher amount of ink, higher volume flows are produced in and / or out of the inking unit than in zones with less colorant transport. Likewise, the target value can be provided depending on the amount of dampening solution in the respective zonal roll area.

Erfindungsgemäß können weiterhin die Lüfter der Absaugeinrichtung zuschaltbar ausgeführt sein, derart, dass die Wirksamkeit der Luftumwälzung im Farbwerk bei bereits zugeschalteten Lüftern der Blaseinrichtung unterstützt wird. Damit kann berücksichtigt werden, dass es abhängig von der transportierten Farbmenge zum Vernebeln oder Spritzen der Druckfarbe kommen kann.According to the invention, the fans of the suction device can furthermore be designed to be switchable, such that the effectiveness of the air circulation in the inking unit is assisted with already connected fans of the blowing device. This can take into account that depending on the transported amount of ink for nebulization or spraying of the ink can come.

Erfindungsgemäß kann ebenfalls vorgesehen sein, dass die Einstellwerte für die Lüfter der Absaugeinrichtung und/oder der Blaseinrichtung abspeicherbar sind, so dass bei Wiederholaufträgen bzw. ähnlichen Druckaufträgen entsprechende Werte wieder zur Einstellung bzw. Voreinstellung gebracht werden können. Somit entfallen zeitaufwendige Anpassungen zu Druckbeginn. Die Einstellung und Sollwertbeaufschlagung der Lüfter der Absaugeinrichtung und/oder der Blaseinrichtung erfolgt bevorzugt vom Leitstand der Druckmaschine aus. Dort können auch die entsprechenden Abspeicherungen von ausgeführten Druckaufträgen erfolgen.According to the invention, it can likewise be provided that the setting values for the fans of the suction device and / or the blowing device can be stored, so that during repeat jobs or similar print jobs corresponding values can be brought back to setting or default. This eliminates time-consuming adjustments at the beginning of printing. The setting and Sollbetbeaufschlagung the fan of the suction device and / or the blowing device is preferably carried out from the control center of the printing press. There can also be the corresponding storage of executed print jobs.

In diesem Zusammenhang ist von besonderem Vorteil, dass die Lüfter der Absaug- und/oder der Blasvorrichtung auch bei unterschiedlichen Betriebszuständen des Farbwerkes zuschaltbar sein können.
Insbesondere können die Lüfter der Blasvorrichtung zuschaltbar sein, wenn eine Verbindung über wenigstens eine Walze zwischen dem Farbwerk und dem Feuchtwerk schaltbar ausgeführt ist. Hierbei kann bei zugeschalteter Verbindung zwischen dem Farbwerk und dem Feuchtwerk mittels der erfindungsgemäßen Vorrichtung durch gezielte Verdunstung vermieden werden, dass unbeabsichtigt Feuchtmittel in das Farbwerk und im Farbwerk vom Formzylinder bzw. der Verbindung zum Feuchtwerk aus nach oben transportiert wird.
Weiterhin können bei Erreichen eines bestimmten Geschwindigkeitsbereiches der Druckmaschine, in dem in erhöhtem Maße Farbnebel oder Farbspritzer auftreten, die Lüfter der Absaugvorrichtung zugeschaltet werden, um den Luftaustausch in dem Raum vor dem Farbwerk zu erhöhen und die Reinigungswirkung zu verbessern.In this context, it is of particular advantage that the fans of the suction and / or the blowing device can be switched on even with different operating conditions of the inking unit.
In particular, the fans of the blowing device can be switched on when a connection is made switchable via at least one roller between the inking unit and the dampening unit. This can be avoided by switched evaporation connection of the inking unit and the dampening unit by means of the device according to the invention that inadvertent dampening solution is transported in the inking unit and in the inking unit from the forme cylinder or the connection to the dampening unit from the top.
Furthermore, upon reaching a certain speed range of the printing press, in which an increased amount of paint mist or paint splash occur, the fan of the suction device can be switched on to increase the air exchange in the space in front of the inking and to improve the cleaning effect.

Die Erfindung kann an einem Farbwerk eines Druckwerkes oder an einem Lackwerk einer Druckmaschine angebracht sein. Ebenso ist die Erfindung bei einem Farbwerk ohne Feuchtwerk (wasserloser Offsetdruck) verwendbar.The invention can be attached to an inking unit of a printing unit or to a coating unit of a printing press. Likewise, the invention in an inking unit without dampening (waterless offset printing) can be used.

Die Erfindung ist in vorteilhafter Weise geeignet, die Verhältnisse im Farbwerk während des Fortdruckes zu stabilisieren. Dies gilt insbesondere auch bei der Verwendung von UV-Druckfarben oder Metall-Druckfarben, die als anfällig für die Aufnahme von Feuchtmittel bekannt sind. Hierbei wird verhindert, dass Feuchtmittel in die Druckfarbe übertragen wird und diese zum Emulgieren neigt. Dieser Mangel kann das ganze Farbwerk erfassen, so dass durch die Erfindung auch vermieden wird, dass die Druckfarbe nicht dünnflüssig wird und deren Verarbeitbarkeit bzw. Dosierbarkeit in Farbdosiereinrichtungen verschlechtert wird.The invention is advantageously suitable for stabilizing the conditions in the inking unit during the printing process. This is especially true when using UV inks or metal inks that are known to be susceptible to dampening. This prevents dampening solution from being transferred to the printing ink and tends to emulsify it. This deficiency can cover the entire inking unit, so that it is also avoided by the invention that the printing ink does not become liquid and its processability or meterability in Farbdosiereinrichtungen is degraded.

Des weiteren erfolgt die Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung.Furthermore, the explanation of an embodiment of the invention with reference to the drawing.

Diese zeigt ein Farbwerk mit der erfindungsgemäßen Absaugeinrichtung.This shows an inking unit with the suction device according to the invention.

Die zu verdruckende Farbe wird von einem Farbkasten 1 über eine Farbkastenwalze 2, der Farbkastenwalze 2 nachgeordnete Farbwerkwalzen 3 und über Farbauftragswalzen 4 auf die auf den Formzylinder 5 aufgespannte Druckform aufgetragen. In Drehrichtung des Formzylinders 5 (Gegenuhrzeigerrichtung) ist den Farbauftragwalzen 4 eine Feuchtauftragwalze 6 vorgeordnet. Die Feuchtauftragwalze 6 wirkt mit Feuchtwalzen 7 eines Feuchtwerkes zusammen. Über eine Brückenwalze 8 erfolgt die Verbindung der Feuchtauftragwalze 6 mit der ersten Farbauftragwalze 4 des Farbwerkes.The color to be printed is applied from an ink fountain 1 via an ink fountain roller 2, the ink fountain roller 2 downstream inking rollers 3 and inking rollers 4 on the pressure plate clamped on the forme cylinder 5. In the direction of rotation of the forme cylinder 5 (counterclockwise direction) the inking rollers 4 upstream of a dampening roller 6. The dampening roller 6 cooperates with dampening rollers 7 of a dampening unit. About a bridge roller 8, the connection of the dampening roller 6 with the first inking roller 4 of the inking unit.

Von der Seite des nicht dargestellten Anlegers her sind die Farbwerkwalzen 3 des Farbwerkes durch einen klappbaren Schutz 9 abgedeckt. Am Schutz 9 sind über die Formatbreite der Druckmaschine sich erstreckend eine Reihe von Axiallüftern 10 angeordnet, durch welche Luft aus dem Inneren des Farbwerksraumes abgesaugt wird. Den Axiallüftern 10 sind in Strömungsrichtung vorgeordnet Filterelemente 11 zugeordnet. Diese nehmen die Verunreinigungen bzw. Farbspritzer / den Farbnebel der durch die Axiallüfter 10 aus dem Farbwerksraum gesaugten Luft auf. So wird vermieden, dass die Axiallüfter 10 selbst von dem Farbspritzer / dem Farbnebel verunreinigt werden.From the side of the investor, not shown, the inking rollers 3 of the inking unit are covered by a hinged protection 9. On the protection 9 are on the format width of the Pressing machine extending a series of axial fans 10 arranged, through which air is sucked from the interior of the inking room. The axial fans 10 are assigned in the flow direction upstream filter elements 11. These absorb the impurities or color splashes / the color mist of the air sucked out of the inking unit by the axial fans 10. This avoids that the axial fans 10 themselves are contaminated by the paint splash / paint mist.

Unterhalb der Reihe der Axiallüfter 10 sind eine weitere Reihe Axiallüfter 12 angeordnet, denen ebenfalls in Strömungsrichtung vorgeordnet Filterelemente 13 zugeordnet sind. Durch die Axiallüfter 12 ist ein Luftstrom in den Raum des Farbwerkes erzeugbar. Der Luftstrom wird hierbei durch Luftleitelemente 14 gegen die Oberfläche einer der Farbwerkwalzen 3 gerichtet.
Vorzugsweise sind die Luftleitelemente 14 so angeordnet, dass der Blasluftstrom tangential oder radial gegen die Farbwerkswalze 3.1 gerichtet wird.Below the row of axial fans 10, a further row of axial fans 12 are arranged, which are also assigned upstream filter elements 13 in the flow direction. By the axial fan 12, an air flow in the space of the inking unit can be generated. The air flow is hereby directed by air guide elements 14 against the surface of one of the inking rollers 3.
Preferably, the air guide elements 14 are arranged so that the blast air flow is directed tangentially or radially against the inking roller 3.1.

Die Farbwerkswalze 3.1 ist in besonderer Weise dazu geeignet, mit einer erfindungsgemäßen Blasvorrichtung zusammen zu arbeiten. Die Farbwerkswalze 3.1 befindet sich gemäß Figur in einem einsträngigen Bereich des Farbwerkes, d.h. in diesem Bereich wird der gesamte Farbtransport lediglich von einer Farbwerkswalze zu einer nächsten ausgeführt, während sich später der Walzenzug in zwei Walzenstränge aufteilt. Die Farbwerkswalze 3.1 ist zudem in ihrer Drehrichtung so angeordnet, dass sich auf der den Luftleitelementen 14 der Blasvorrichtung zugewandten Seite der Farbwerkswalze 3.1 eine Aufwärtsbewegung ergibt. In diesem Bereich wird also potentiell Feuchtmittel im Farbwerk aufwärts gefördert. Damit kann an dieser Stelle der Transport von Feuchtmittel in das Farbwerk besonders vorteilhaft unterbunden oder zumindest minimiert werden, um so eine Vermischung von Druckfarbe und Feuchtmittel zu verhindern.The inking roller 3.1 is particularly suitable for working together with a blowing device according to the invention. The inking roller 3.1 is according to the figure in a single-stranded area of the inking unit, ie in this area, the entire color transport is carried out only from one inking roller to another, while later the compactor divided into two roller strands. The inking roller 3.1 is also arranged in its direction of rotation so that there is an upward movement on the air guide elements 14 of the blowing device facing side of the ink fountain roller 3.1. In this area, therefore, potentially dampening solution in the inking unit is promoted upwards. This can be particularly advantageous prevented or at least minimized at this point the transport of dampening solution in the inking unit so as to prevent mixing of printing ink and dampening solution.

Die Filterelemente 11, 13 sind vorzugsweise aus einem Vliesmaterial aus Kunststoff oder aus Papier hergestellt und sehr einfach aus den Gehäuseelementen an den Axiallüftern 10, 12 entnehmbar bzw. austauschbar. Zur weiteren Vereinfachung des Austausches können die Filterelemente 11, 13 auch bahnförmig ausgeführt sein. Dann besteht die Möglichkeit an einer - z.B. der oberen - Seite der Aufnahmen der Axiallüfter 10 eine Vorratsrolle des Filtermaterials vorzusehen. Die Filterbahn kann dann durch die Aufnahmen der Filterelemente geführt und auf der gegenüberliegenden Seite der Axiallüfter 12 auf einer Aufwickelrolle aufgenommen werden. Wenn die Filterbahn verschmutzt ist, braucht diese nur um das verschmutzte Stück auf die Aufwickelrolle transportiert zu werden, wobei gleichzeitig frische Filterbahn in den Bereich der Axiallüfter 10, 12 gebracht wird. Die Wickeleinrichtung kann antreibbar und somit fernbetätigt oder selbstätig einstellend ausgerüstet werden.The filter elements 11, 13 are preferably made of a nonwoven material made of plastic or paper and very easily removed from the housing elements on the axial fans 10, 12 or exchangeable. To further simplify the exchange, the filter elements 11, 13 may also be designed in the form of a web. Then there is the possibility at a -. the upper - side of the recordings of the axial fan 10 to provide a supply roll of the filter material. The filter web can then be guided through the receptacles of the filter elements and received on the opposite side of the axial fan 12 on a take-up reel. If the filter web is dirty, it only needs to be transported to the take-up reel to the soiled piece, while fresh filter web is brought into the range of axial fans 10, 12. The winding device can be driven and thus remotely operated or selbstätig adjusting equipped.

Durch den in das Farbwerk und insbesondere radial oder tangential auf eine Farbwerkwalzenoberfläche geleiteten Luftstrom der Axiallüfter 12 ergibt sich in Verbindung mit dem Absaugen der Farbwerksluft durch die Axiallüfter 10 ein verbesserter Abtransport von Farbnebel / Farbspritzern aus dem Inneren des Farbwerkes. Dies ist insbesondere dann von Bedeutung, wenn mit unterschiedlichen Farbschichtdicken auf den Farbwerkswalzen gearbeitet wird, wobei sich bei größeren Farbschichtdicken bevorzugt Farbspritzer ergeben, die mit erhöhter Luftumwälzung beseitigt werden müssen. Die Axiallüfter 10, 12 können zusätzlich sowohl gruppenweise innerhalb ihrer Zuordnung zu der Blas- oder Absaugvorrichtung einstellbar bzw. zuschaltbar sein, um unterschiedliche Verteilungen von Farbnebel oder Farbspritzern zu berücksichtigen.By the guided into the inking unit and in particular radially or tangentially to an inking roller surface air flow of the axial fan 12 results in conjunction with the suction of the inking air through the axial fan 10, an improved removal of paint mist / paint splashes from the interior of the inking unit. This is particularly important when working with different ink layer thicknesses on the inking rollers, which at higher ink layer thicknesses preferably give splashes of color that must be eliminated with increased air circulation. The axial fans 10, 12 can additionally be adjusted both in groups within their assignment to the blowing or suction device or be switchable to account for different distributions of paint mist or paint splashes.

Ein wichtiger Einsatzfall ist in diesem Zusammenhang die Zuschaltung der Axiallüfter 10 der Absaugeinrichtung bei unterschiedlichen Produktionsgeschwindigkeiten. Die Vernebelung von Druckfarbe oder das Abspritzen von Farbpartikeln setzt häufig in bestimmten bekannten Geschwindigkeitsbereichen ein. Den negativen Auswirkungen der Produktionsgeschwindigkeit auf die Farbnebelbildung oder das Spritzen von Druckfarbe kann also in vorteilhafter Weise mittels automatischer Zuschaltung der Axiallüfter 10 der Absaugeinrichtung in den genannten Geschwindigkeitsbereichen begegnet werden.An important application in this context is the connection of the axial fans 10 of the suction device at different production speeds. The misting of ink or the spraying of paint particles often sets in certain known speed ranges. The negative effects of the production speed on the color fog or the spraying of printing ink can thus be countered in an advantageous manner by means of automatic connection of the axial fan 10 of the suction device in the speed ranges mentioned.

Ein weiterer Anwendungsfall hierfür ist auch eine über die Breite des Druckwerkes unterschiedliche Verteilung von Feuchtmittel. Hierbei kann eine Anhäufung von Feuchtmittel quer zur Transportrichtung im Randbereich oder im mittleren Bereich der Walzen auftreten. Dem kann durch entsprechend gruppenweise Zuschaltung wenigstens von Axiallüftern 12 der Blasvorrichtung begegnet werden.Another application for this is also a different across the width of the printing unit distribution of dampening solution. Here, an accumulation of fountain solution transverse to the transport direction in the edge region or in the central region of the rollers occur. This can be countered by corresponding group-wise connection of at least axial fans 12 of the blowing device.

Es ist auch möglich, die Axiallüfter 12 der Blaseinrichtung und die Axiallüfter 10 der Absaugeinrichtung getrennt voneinander zuzuschalten. Dadurch ergibt sich die Möglichkeit, dass bei einer schaltbar angeordneten Brückenwalze 8 die Axiallüfter 12 der Blaseinrichtung zugeschaltet werden. Damit kann verhindert werden, dass durch die Verbindung zwischen Farbwerk und Feuchtwerk über die Brückenwalze 8 unnötig viel Feuchtmittel in das Farbwerk transportiert wird.It is also possible to connect the axial fans 12 of the blowing device and the axial fans 10 of the suction device separately from each other. This results in the possibility that in a switchable arranged bridge roller 8, the axial fan 12 of the blowing device are switched on. This can be prevented that unnecessarily much dampening solution is transported through the connection between the inking unit and dampening unit over the bridge roller 8 in the inking unit.

Dieser spezielle Fall kann auch auftreten, wenn die Brückenwalze 8 nur kurzzeitig zugeschaltet wird, um Verschmutzungen aus dem Bereich der Druckplatte abzutransportieren. Der so in das Farbwerk eingetragene Feuchtmittelanteil kann mittels der Blaseinrichtung frühzeitig wieder beseitigt werden.This special case can also occur when the bridge roller 8 is switched on only for a short time in order to transport away contaminants from the area of the printing plate. The so in The inking registered dampening solution can be eliminated early by means of the blower.

Zusätzlich kann auf diese Weise durch die einstellbaren Axiallüfter 12 auch noch gezielt angesammelte Feuchtigkeit aus dem oberen Bereich des Farbwerkes ausgetrieben werden. Diese Wirkung wiederum kann - in umgekehrter Betrachtungsweise - durch unabhängiges Zuschalten der Axiallüfter 10 der Absaugeinrichtung unterstützt werden.In addition, in this way can be expelled by the adjustable axial fan 12 also specifically accumulated moisture from the upper region of the inking unit. This effect in turn can be supported - in reverse view - by independently connecting the axial fan 10 of the suction device.

[Bezugszeichenliste][REFERENCE LIST]

11
Farbkastenpaintbox
22
FarbkastenwalzeInk fountain roller
33
FarbwerkswalzeInking roller
3.13.1
FarbwerkswalzeInking roller
44
FarbauftragwalzeInking roller
55
Formzylinderform cylinder
66
FeuchtauftragwalzeDampener roller
77
FeuchtwerkswalzePan roll
88th
Brückenwalzebridge roller
99
Schutzprotection
1010
Axiallüfter (Absaugung)Axial fan (suction)
1111
Filterelementfilter element
1212
Axiallüfter (Blaseinrichtung)Axial fan (blowing device)
1313
Filterelementfilter element
1414
Luftleitelementair guide

Claims (11)

  1. Inking unit suction for a printing press, particularly an offset sheet printing press with at least one suction unit (10, 11) which is constituted by a fan (10) installed in front of the inking unit by means of which air can be fed out from the inking unit space and a filter element (11) arranged in front of the fan (10),
    characterised in that
    fitted to the fan (10) of the suction unit (10, 11) is a blowing unit (12, 13, 14) generating an air stream within the inking unit, wherein the blowing unit (12, 13, 14) is directed towards a roller region of an inking unit roller (3.1) which effects a movement from an inking unit roller (3) which is arranged closer to the forme cylinder (5) in the direction of transport of the inking unit relatively to an inking unit roller (3) lying correspondingly further removed and that the inking unit roller (3.1) is located in a single path region (3) of the inking unit
    wherein, by means of the blowing device (12, 13, 14), an air stream directed radially or tangentially on to the surface of the inking unit roller (3.1) can be generated
    and that the suction unit (10, 11) and the blowing unit (12, 13, 14) is formed by means of in each case a set of adjacently located axial fans (10, 12) extending across the width of the press.
  2. Inking unit suction according to Claim 1, characterised in that the blowing unit (12, 13, 14) is fitted with a filter element (13).
  3. Inking unit suction according to Claim 1 and 2, characterised in that a common filter element (11, 13) is fitted to the suction unit (10, 11) and to the blowing unit (12, 13, 14).
  4. Inking unit suction according to Claim 3, characterised in that the common filter element (11, 13) is constructed by a filter web which can be transported from a storage turning roll on to a wind-up roller and arranged in each case prior to the axial fans in the direction of flow (10, 12).
  5. Inking unit suction according to one or more of the preceding Claims, characterised in that the suction unit (10, 11) and the blowing unit (12, 13, 14) are fitted to a protection (9) in front of the inking unit rollers.
  6. Inking unit suction according to Claim 1, characterised in that the blowing unit (12, 13, 14) has air guide elements by means of which an air stream can be generated directed radially or tangential relative to the surface of the inking unit roller (3.1) directed.
  7. Inking unit suction according to one or more of the preceding Claims, characterised in that the fans (10, 12) of the suction device (10, 11) and/or the blowing unit (12, 13, 14) can be controlled individually and/or collected together in groups.
  8. Inking unit suction according to Claim 7, characterised in that the adjustment values for the fans (10, 12) of the suction device (10, 11) and/or of the blowing unit (12, 13, 14) can be stored and brought back into operation again.
  9. Inking unit suction according to Claim 7, characterised in that the fans (10, 12) of the suction unit (10, 11) and/or of the blowing unit (12, 13, 14) can be switched on and off in dependence on the production speed of the press.
  10. Inking unit suction according to Claim 7 or 8, characterised in that at least the fans (10) of the blowing unit (12, 13, 14) on switching in a connection between the damping unit and the inking unit can be switched in by means of a bridging roller (8).
  11. Inking unit suction according to one or more of Claims 7 to 10, characterised in that the fans (10, 12) of the suction device (10, 11) and/or the blowing unit (12, 13, 14) can be controlled from a control desk fitted to the press.
EP04014676A 2003-07-26 2004-06-23 Suction device in an inking unit Expired - Lifetime EP1502740B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20311534U DE20311534U1 (en) 2003-07-26 2003-07-26 Device for inking unit extraction
DE20311534U 2003-07-26

Publications (3)

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EP1502740A2 EP1502740A2 (en) 2005-02-02
EP1502740A3 EP1502740A3 (en) 2008-04-30
EP1502740B1 true EP1502740B1 (en) 2009-09-09

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JP (2) JP2005041226A (en)
AT (1) ATE442254T1 (en)
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DE102017201720A1 (en) 2017-02-03 2018-08-09 Koenig & Bauer Ag Printing machine with housing and a method for operating a printing press

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DE102012222774B4 (en) * 2012-12-11 2016-09-15 Koenig & Bauer Ag Printing unit of a printing press
DE102014115866A1 (en) * 2014-10-31 2016-05-04 manroland sheetfed GmbH Device for inking unit ventilation
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DE102016200448B3 (en) * 2016-01-15 2016-04-14 Koenig & Bauer Ag Printing machine with ventilated housing
DE102017201720A1 (en) 2017-02-03 2018-08-09 Koenig & Bauer Ag Printing machine with housing and a method for operating a printing press

Also Published As

Publication number Publication date
ATE442254T1 (en) 2009-09-15
JP2005041226A (en) 2005-02-17
DE502004010029D1 (en) 2009-10-22
EP1502740A2 (en) 2005-02-02
EP1502740A3 (en) 2008-04-30
DE20311534U1 (en) 2003-10-09
JP4851484B2 (en) 2012-01-11
JP2008173986A (en) 2008-07-31

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