EP0983850A2 - Method for the influence on the transmission rate - Google Patents
Method for the influence on the transmission rate Download PDFInfo
- Publication number
- EP0983850A2 EP0983850A2 EP99115131A EP99115131A EP0983850A2 EP 0983850 A2 EP0983850 A2 EP 0983850A2 EP 99115131 A EP99115131 A EP 99115131A EP 99115131 A EP99115131 A EP 99115131A EP 0983850 A2 EP0983850 A2 EP 0983850A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- transmission rate
- transfer
- peripheral speed
- influencing
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/004—Driving means for ink rollers
-
- 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
- B41F31/027—Ink rail devices for inking ink rollers
Definitions
- the invention relates to a method applicable to printing machines for influencing the Transfer rate of media such as paint, water or paint.
- anilox roller which interacts with a chambered doctor blade and at least one transfer roller which interacts with the anilox roller and a forme cylinder (DE 4344084 C1).
- the anilox roller is connected to the drive wheel train of the printing press and rotates with the downstream roller at the same peripheral speed.
- the object of the invention is to provide a method for effectively influencing the Transfer rate of that provided by a chambered doctor blade system - anilox roller / chambered doctor blade Medium without much effort.
- the amount of the medium to be transferred (transfer rate v 0 ) is determined by the circumferential speed difference v diff of an anilox roller or a transfer roller in relation to a downstream roller.
- the transmission diagram for the medium is shown in Fig. 2.
- the diagram shows the transmission rate in relation to the percentage circumferential speed difference v diff , wherein a percentage circumferential speed difference one means the same circumferential speed between the anilox roller and the downstream roller.
- the transfer rate v 0 between anilox roller and downstream roller, ie applicator roller, forme cylinder or transfer roller is changed by only a slight change in the peripheral speed of the anilox roller or transfer roller to the downstream roller and thus creating a minimal peripheral speed difference v diff .
- the range of percentage change in peripheral speed between anilox roller or transfer roller and downstream roller ranges from 0.970 to 1.015.
- An effective change in the transmission rate and thus, for example, in the color transmission of the optical density on the printed sheet is only possible in this minimal range.
- the change in peripheral speed can take place in a positive or negative direction, ie as a reduction in peripheral speed or as an increase in peripheral speed. This means that several operating options are possible.
- the transmission rate v 0 is reduced from the first operating point B 1 - circumferential speed difference one, ie synchronism - by creating a circumferential speed difference.
- This variant can also be included in a control loop.
- the circumferential speed difference v diff is increased and, in order to avoid an oversupply of color, the transmission rate v 0 is reduced.
- the printing press is normally operated at the second operating point B 2 , which lies on the ascending or descending branch of the curve (FIG. 2).
- Fig. 1 the roller diagrams of a short application unit (anilox technique) of a sheet-fed printing machine is shown.
- the method according to the invention can be applied to this short application.
- the roller diagram shows a printing cylinder 1 with gripper systems 2, an offset cylinder 3 and a forme cylinder 4.
- the anilox roller 5 with a chambered doctor blade 6 is indirectly assigned to the forme cylinder 4 via an application roller 7 for ink application.
- the anilox roller 5 is assigned a variable-speed drive 8.
- a transfer roller can be arranged between the application roller 7 and the anilox roller 5. In this case, either the anilox roller 5 or the transfer roller of the variable-speed drive 8 is assigned.
- the variable-speed drive 8 is designed as a self-drive, for example as a motor.
- the Drive can also by incorporating the drive gear of the anilox roller 5 or the transfer roller in the drive wheel train of the printing press and the interposition of a speed-controlling Conversion element between the drive gear and anilox roller 5 or transfer roller respectively.
- a conversion element for the minimal circumferential speed difference to be realized brakes, clutches, etc. can even be used.
- the anilox roller 5 can in the direction of rotation synchronous operation (by direction arrow in Fig. 1st indicated) work, d. H. the anilox roller and the downstream roller have at the point of contact same direction of rotation.
- the anilox roller 5 works in reverse mode (by double arrow in FIG. 1 indicated); d. H. the anilox roller and the downstream roller have different points of contact Direction of rotation.
Abstract
Description
Die Erfindung betrifft ein an Druckmaschinen anwendbares Verfahren zur Beeinflussung der Übertragungsrate von Medien, wie Farbe, Wasser oder Lack.The invention relates to a method applicable to printing machines for influencing the Transfer rate of media such as paint, water or paint.
Zum Übertragen von Farbe, Lack etc. sind Zufuhrsysteme mit einer mit einem Kammerrakel
zusammenwirkenden Rasterwalze und mindestens einer mit der Rasterwalze und einem Formzylinder
zusammenwirkenden Übertragungswalze bekannt (DE 4344084 C1).
Die Rasterwalze ist dabei mit dem Antriebsräderzug der Druckmaschine verbunden und rotiert
mit der nachgeordneten Walze mit gleicher Umfangsgeschwindigkeit.For the transfer of paint, lacquer, etc., supply systems are known with an anilox roller which interacts with a chambered doctor blade and at least one transfer roller which interacts with the anilox roller and a forme cylinder (DE 4344084 C1).
The anilox roller is connected to the drive wheel train of the printing press and rotates with the downstream roller at the same peripheral speed.
Zur Veränderung der optischen Dichte auf dem Druckbogen ist es bekannt ( US 4445433 ), das
Umfangsgeschwindigkeitsverhältnis zwischen einer Aniloxwalze und einer Auftragwalze von
1:1 auf 3:1 bzw 1:3, vorzugsweise auf 2:1 bzw.1:2 zu ändern.
Diese Anderung erbringt auf Grund des falsch gewählten Umfangsgeschwindigkeitsverhältnisses
in der Praxis keinerlei Effekt und erfordert Getriebe mit großem Stellbereich.
Eine Variation der zu übertragenden Menge von Medium ist damit weiterhin nur über einen
Austausch der Rasterwalze möglich, d. h. Ersatz der verwendeten Rasterwalze durch eine Rasterwalze
mit höherem oder niedrigerem Schöpfvolumen.
Des Weiteren tritt bei niedrigen Maschinendrehzahlen der Nachteil auf, dass die Übertragungsrate
des Mediums (Farbe, Lack etc.) relativ groß ist, es zu einer Überdosierung kommt und damit
beim Farbauftrag die Dichtewerte der Druckerzeugnisse negativ beeinflußt werden.To change the optical density on the printed sheet, it is known (US 4445433) to change the peripheral speed ratio between an anilox roller and an application roller from 1: 1 to 3: 1 or 1: 3, preferably to 2: 1 or 1: 2.
Due to the incorrectly selected peripheral speed ratio, this change has no effect in practice and requires gear units with a large adjustment range.
A variation of the amount of medium to be transferred is therefore still only possible by exchanging the anilox roller, ie replacing the anilox roller used with an anilox roller with a higher or lower scooping volume.
Furthermore, at low machine speeds, there is the disadvantage that the transfer rate of the medium (ink, varnish, etc.) is relatively high, there is an overdosing and thus the density values of the printed products are negatively influenced during ink application.
Aufgabe der Erfindung ist die Schaffung eines Verfahrens zur wirksamen Beeinflussung der Übertragungsrate des von einem Kammerrakelsystem - Rasterwalze / Kammerrakel - bereitgestellten Mediums ohne großen Aufwand.The object of the invention is to provide a method for effectively influencing the Transfer rate of that provided by a chambered doctor blade system - anilox roller / chambered doctor blade Medium without much effort.
Erfindungsgemäß wird die Aufgabe durch den ersten Patentanspruch gelöst, zweckmäßige Ausgestaltungen sind in den Unteransprüchen offenbart. According to the invention the object is achieved by the first claim, expedient embodiments are disclosed in the subclaims.
Nachfolgend wird das erfindundgemäße Verfahren an einem Ausführungsbeispiel näher erläutert.The method according to the invention is explained in more detail below using an exemplary embodiment.
Die Zeichnung zeigt in
- Fig. 1:
- Walzenschemata
- Fig. 2:
- Übertragungsdiagramm
- Fig. 1:
- Roll schemes
- Fig. 2:
- Transfer diagram
Die Menge des zu übertragenden Mediums (Übertragungsrate v0) wird durch die Umfangsgeschwindigkeitsdifferenz
vdiff einer Rasterwalze bzw. einer Übertragungswalze in Relation zu einer
nachgeordneten Walze bestimmt.
Das Übertragungsdiagramm für das Medium ist in Fig. 2 dargestellt. Das Diagramm zeigt die
Übertragungsrate in Bezug auf die prozentuale Umfangsgeschwindigkeitsdifferenz vdiff, wobei
eine prozentuale Umfangsgeschwindigkeitsdifferenz Eins gleiche Umfangsgeschwindigkeit zwischen
Rasterwalze und nachgeordneter Walze bedeutet.The amount of the medium to be transferred (transfer rate v 0 ) is determined by the circumferential speed difference v diff of an anilox roller or a transfer roller in relation to a downstream roller.
The transmission diagram for the medium is shown in Fig. 2. The diagram shows the transmission rate in relation to the percentage circumferential speed difference v diff , wherein a percentage circumferential speed difference one means the same circumferential speed between the anilox roller and the downstream roller.
Gemäß dem Verfahren wird die Übertragungsrate v0 zwischen Rasterwalze und nachgeordneter
Walze, d.h. Auftragwalze, Formzylinder oder Übertragungswalze durch eine nur geringfügige
Veränderung der Umfangsgeschwindigkeit der Rasterwalze bzw. Übertragungswalze zur nachgeordneten
Walze und damit Schaffüng einer minimalen Umfangsgeschwindigkeitsdifferenz vdiff
verandert. Der Bereich der prozentualen Umfangsgeschwindigkeitsänderung zwischen Rasterwalze
oder Übertragungswalze und nachgeordneter Walze reicht von 0,970 bis 1,015. Nur in
diesem Minimalbereich ist eine wirksame Änderung der Übertragungsrate und damit breispielsweisebei
der Farbübertragung der optischen Dichte auf dem Druckbogen möglich.
Die Umfangsgeschwindigkeitsänderung kann in positiver oder negativer Richtung, d. h. als Umfangsgeschwindigkeitsverringerung
oder als Umfangsgeschwindigkeitserhöhung erfolgen.
Damit sind mehrere Betriebsvarianten möglich. Nach einer ersten Variante wird vom ersten Betriebspunkt
B1 - Umfangsgeschwindigkeitsdifferenz Eins, d. h. Gleichlauf - die Übertragungsrate
v0 durch Schaffung einer Umfangsgeschwindigkeitsdifferenz verringert. According to the method, the transfer rate v 0 between anilox roller and downstream roller, ie applicator roller, forme cylinder or transfer roller is changed by only a slight change in the peripheral speed of the anilox roller or transfer roller to the downstream roller and thus creating a minimal peripheral speed difference v diff . The range of percentage change in peripheral speed between anilox roller or transfer roller and downstream roller ranges from 0.970 to 1.015. An effective change in the transmission rate and thus, for example, in the color transmission of the optical density on the printed sheet is only possible in this minimal range.
The change in peripheral speed can take place in a positive or negative direction, ie as a reduction in peripheral speed or as an increase in peripheral speed.
This means that several operating options are possible. According to a first variant, the transmission rate v 0 is reduced from the first operating point B 1 - circumferential speed difference one, ie synchronism - by creating a circumferential speed difference.
Diese Variante läßt sich auch in einen Regelkreis einbeziehen. Bei einer Verringerung bzw. geringen Maschinendrehzahl wird die Umfangsgeschwindigkeitsdifferenz vdiff vergrößert und damit, um ein Überangebot an Farbe zu vermeiden, die Übertragungsrate v0 verringert.This variant can also be included in a control loop. With a reduction or low engine speed, the circumferential speed difference v diff is increased and, in order to avoid an oversupply of color, the transmission rate v 0 is reduced.
Nach einer zweiten Variante wird die Druckmaschine im Normalfall im zweiten Betriebspunkt B2, der auf dem an- oder absteigenden Ast der Kurve (Fig. 2) liegt, betrieben. Eine Verringerung der Umfangsgeschwindigkeitsdifferenz vdiff in Richtung Eins, d. h. Gleichlauf, erbringt eine Erhöhung der Übertragungsrate v0.According to a second variant, the printing press is normally operated at the second operating point B 2 , which lies on the ascending or descending branch of the curve (FIG. 2). A reduction in the circumferential speed difference v diff in the direction of one, ie synchronous operation, results in an increase in the transmission rate v 0 .
In Fig. 1 ist das Walzenschemata eines Kurzauftragwerkes (Aniloxtechnik) einer Bogendruckmaschine
dargestellt. Das erfindungsgemäße Verfahren ist an diesem Kurzauftragwerk anwendbar.
Das Walzenschemata zeigt einen Druckzylinder 1 mit Greifersystemen 2, einen Offsetzylinder
3 und einen Formzylinder 4. Dem Formzylinder 4 ist indirekt über eine Auftragwalze 7 zum
Farbauftrag eine Rasterwalze 5 mit einem Kammerrakel 6 zugeordnet. Dabei ist der Rasterwalze
5 ein drehzahlvariabler Antrieb 8 zugeordnet.
Zwischen der Auftragwalze 7 und der Rasterwalze 5 kann eine Übertragungswalze angeordnet
werden. In diesem Fall ist entweder der Rasterwalze 5 oder der Übertragungswalze der drehzahlvariable
Antrieb 8 zugeordnet.In Fig. 1, the roller diagrams of a short application unit (anilox technique) of a sheet-fed printing machine is shown. The method according to the invention can be applied to this short application. The roller diagram shows a printing cylinder 1 with
A transfer roller can be arranged between the
Der drehzahlvariable Antrieb 8 ist als Eigenantrieb, beispielsweise als Motor ausgebildet. Der
Antrieb kann auch durch Eingliederung des Antriebszahnrades der Rasterwalze 5 oder der Übertragungswalze
in den Antriebsräderzug der Druckmaschine und Zwischenschaltung eines drehzahlsteuernden
Wandlungselementes zwischen Antriebszahnrad und Rasterwalze 5 bzw. Übertragungswalze
erfolgen. Als Wandlungselement für die minimal zu realisierende Umfangsgeschwindigkeitsdifferenz
sind sogar Bremsen, Kupplungen etc. anwendbar. The variable-
Die Rasterwalze 5 kann im Drehrichtungs-Gleichlaufbetrieb (durch Drehrichtungspfeil in Fig. 1
angedeutet) arbeiten, d. h. die Rasterwalze und die nachgeordnete Walze haben im Berührungspunkt
gleiche Drehrichtung.The
Nach einer Variante arbeitet die Rasterwalze 5 im Reversebetrieb (durch Doppelpfeil in Fig. 1
angedeutet); d. h. die Rasterwalze und die nachgeordnete Walze haben im Berührungspunkt unterschiedliche
Drehrichtung. According to a variant, the
- 11
- DruckzylinderImpression cylinder
- 22nd
- GreifersystemGripper system
- 33rd
- OffsetzylinderOffset cylinder
- 44th
- FormzylinderForme cylinder
- 55
- RasterwalzeAnilox roller
- 66
- KammerrakelChamber squeegee
- 77
- AuftragwalzeApplicator roller
- 88th
- Antriebdrive
- vdiff v diff
- prozentuale Umfangsgeschwindigkeitsdifferenzpercentage circumferential speed difference
- v0 v 0
- ÜbertragungsrateTransfer rate
- B1 B 1
- erster Betriebspunktfirst operating point
- B2 B 2
- zweiter Betriebspunktsecond operating point
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19840602A DE19840602A1 (en) | 1998-09-05 | 1998-09-05 | Process for influencing the transmission rate |
DE19840602 | 1998-09-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0983850A2 true EP0983850A2 (en) | 2000-03-08 |
EP0983850A3 EP0983850A3 (en) | 2000-05-24 |
EP0983850B1 EP0983850B1 (en) | 2002-10-30 |
Family
ID=7879957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99115131A Expired - Lifetime EP0983850B1 (en) | 1998-09-05 | 1999-08-10 | Method for the influence on the transmission rate |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0983850B1 (en) |
JP (1) | JP2000085108A (en) |
DE (2) | DE19840602A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001087036A2 (en) * | 2000-05-17 | 2001-11-22 | Koenig & Bauer Aktiengesellschaft | Short inking system for a rotary printing machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10143827A1 (en) | 2001-09-07 | 2003-03-27 | Heidelberger Druckmasch Ag | Method for controlling the transfer of a quantity of medium between two rollers |
USRE40160E1 (en) * | 2001-09-07 | 2008-03-25 | Heidelberger Druckmaschinen Ag | Method for controlling a quantity of medium transferable between two rollers |
DE10144563A1 (en) * | 2001-09-11 | 2003-03-27 | Heidelberger Druckmasch Ag | Printing press and method for operating an inking unit |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1904178A1 (en) * | 1969-01-29 | 1970-08-06 | Schluckebier Wilhelm | Method and device for dampening printing plates of an offset printing machine |
US4445433A (en) * | 1982-04-02 | 1984-05-01 | Menashe Navi | Method and apparatus for variable density inking |
DE3638469A1 (en) * | 1986-04-01 | 1987-10-08 | Polygraph Leipzig | Method and apparatus for driving a varnishing device |
US5113761A (en) * | 1990-03-19 | 1992-05-19 | Kabushikigaisha Tokyo Kikai Seisakusho | Inking device |
DE4431464A1 (en) * | 1994-09-03 | 1996-03-07 | Koenig & Bauer Albert Ag | Inking process for form cylinder of rotary press with short inking device |
DE19501148A1 (en) * | 1995-01-17 | 1996-07-18 | Roland Man Druckmasch | Process and dampening system for applying a dampening solution |
EP0796733A1 (en) * | 1996-03-20 | 1997-09-24 | WindmÀ¶ller & Hölscher | Printing machine, preferably flexographic press |
-
1998
- 1998-09-05 DE DE19840602A patent/DE19840602A1/en not_active Withdrawn
-
1999
- 1999-08-10 DE DE59903233T patent/DE59903233D1/en not_active Expired - Lifetime
- 1999-08-10 EP EP99115131A patent/EP0983850B1/en not_active Expired - Lifetime
- 1999-09-02 JP JP11248738A patent/JP2000085108A/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1904178A1 (en) * | 1969-01-29 | 1970-08-06 | Schluckebier Wilhelm | Method and device for dampening printing plates of an offset printing machine |
US4445433A (en) * | 1982-04-02 | 1984-05-01 | Menashe Navi | Method and apparatus for variable density inking |
DE3638469A1 (en) * | 1986-04-01 | 1987-10-08 | Polygraph Leipzig | Method and apparatus for driving a varnishing device |
US5113761A (en) * | 1990-03-19 | 1992-05-19 | Kabushikigaisha Tokyo Kikai Seisakusho | Inking device |
DE4431464A1 (en) * | 1994-09-03 | 1996-03-07 | Koenig & Bauer Albert Ag | Inking process for form cylinder of rotary press with short inking device |
DE19501148A1 (en) * | 1995-01-17 | 1996-07-18 | Roland Man Druckmasch | Process and dampening system for applying a dampening solution |
EP0796733A1 (en) * | 1996-03-20 | 1997-09-24 | WindmÀ¶ller & Hölscher | Printing machine, preferably flexographic press |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001087036A2 (en) * | 2000-05-17 | 2001-11-22 | Koenig & Bauer Aktiengesellschaft | Short inking system for a rotary printing machine |
WO2001087036A3 (en) * | 2000-05-17 | 2002-06-20 | Koenig & Bauer Ag | Short inking system for a rotary printing machine |
EP1457331A2 (en) * | 2000-05-17 | 2004-09-15 | Koenig & Bauer Aktiengesellschaft | Short inking system for a rotary printing machine |
US6886461B2 (en) | 2000-05-17 | 2005-05-03 | Koenig & Bauer Aktiengesellschaft | Short inking system for a rotary printing machine |
EP1457331A3 (en) * | 2000-05-17 | 2007-07-04 | Koenig & Bauer Aktiengesellschaft | Short inking system for a rotary printing machine |
Also Published As
Publication number | Publication date |
---|---|
DE59903233D1 (en) | 2002-12-05 |
EP0983850B1 (en) | 2002-10-30 |
EP0983850A3 (en) | 2000-05-24 |
DE19840602A1 (en) | 2000-03-09 |
JP2000085108A (en) | 2000-03-28 |
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