EP0783408B1 - Flexodruckmaschine mit variabler drucklänge - Google Patents
Flexodruckmaschine mit variabler drucklänge Download PDFInfo
- Publication number
- EP0783408B1 EP0783408B1 EP96911997A EP96911997A EP0783408B1 EP 0783408 B1 EP0783408 B1 EP 0783408B1 EP 96911997 A EP96911997 A EP 96911997A EP 96911997 A EP96911997 A EP 96911997A EP 0783408 B1 EP0783408 B1 EP 0783408B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impression cylinder
- cylinder
- gear
- shaft
- applicator roll
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
Definitions
- the invention relates to a flexographic printing machine according to the preamble of Claim 1.
- Flexographic printing presses usually have several inking units Scope of a common impression cylinder are arranged and each have a printing cylinder and an application roller.
- the application roller is used to ink the clichés on the printing cylinder.
- the applicator roller on its surface for this purpose uniform well grid, the wells for example with the help of a Chamber knife can be filled with printing ink.
- the application roller with the ink-filled cup rolls on the circumference of the printing cylinder and passes the color on the raised, printing parts of the clichés. It is it is important that the application roller and the impression cylinder have exactly the same peripheral speed own so that the color when applied to the printing cylinder is not blurred.
- the printing material wraps around the impression cylinder of its circumference, so that between the impression cylinder and the printing material practically no slip occurs and thus the web speed of the substrate equal to the peripheral speed of the impression cylinder is.
- the peripheral speed of the impression cylinder is correct and thus also the web speed of the substrate with the Circumferential speed of the printing cylinder match, so that the print image is transferred cleanly to the printing material.
- the drive is used in numerous conventional flexographic printing machines of the inking units via a seated on the shaft of the impression cylinder Central wheel, that with the pressure cylinder gears of all inking units combs and its pitch circle radius is equal to the outer radius of the impression cylinder (plus the thickness of the substrate), so that any slip between the printing cylinder and the substrate is avoided.
- the transmission ratio between the impression cylinder and the impression cylinder can only assume discrete values corresponding to the number of teeth ratio between the impression cylinder gear and the central gear, in this case only discrete values can be selected for the circumference of the impression cylinder, namely integer multiples of U / Z, where U the circumference of the impression cylinder and Z is the number of teeth on the central wheel.
- the value Zd U / Z is then the number of teeth on the pressure cylinder gear.
- the circumference of the printing cylinder determines the so-called printing length, ie the length of the repetitive printing images produced by rolling the printing cylinder onto the printing material in the longitudinal direction of the printing material.
- the print length must be exactly the same as the working length match the downstream processing station.
- the working length is now the downstream one Machine specified by the requirements for the product.
- it is often desirable to help out of the substrate a punch sheets are punched out with a predetermined length, the each carry a single printed image in register.
- the print length can be adapted to the desired sheet length.
- the print length is only in discrete Steps can be varied.
- the price has been helped by targeting a certain one Slip between the impression cylinder and the substrate on the impression cylinder brings about, while the applicator roller still slip-free rolls on the impression cylinder.
- the peripheral speed of the impression cylinder is then slightly different from the peripheral speed of the impression cylinder, and the image is checked as it is transferred to the substrate blurred so that the actual print length varies from the circumference of the Printing cylinder around the slip factor S differs by the ratio the peripheral speeds of the impression cylinder and impression cylinder given is.
- the rough setting of the print length is then carried out by suitable choice of the number of teeth of the pressure cylinder gear and the circumference of the printing cylinder, and the fine adjustment of the printing length takes place via the Slip factor S.
- the object of the invention is to provide a flexographic printing machine in which the print length is infinitely variable without slippage between the printing cylinders and printing material occurs.
- the one mentioned at the outset Type of each application roller via a gear transmission with a fixed gear ratio through a seated on the shaft of the impression cylinder Central wheel can be driven.
- the speed of the pressure cylinder is therefore not only of the speed of the impression cylinder, but also from the speed of the Application rollers independently, and by the fixed gear ratio between the central wheel and the application rollers ensures that the peripheral speed of the application rollers always with that of the impression cylinder or the printing substrate matches.
- the choice of print length takes place according to the invention via a suitable choice of the diameter the impression cylinder. In general, therefore, the circumference of the impression cylinder be a non-integer multiple of U / Z.
- the separate drive for the pressure cylinder is regulated so that the peripheral speed of the Printing cylinder with the peripheral speed of the impression cylinder and consequently also corresponds to the peripheral speed of the application roller. It therefore does not occur between the impression cylinder and the substrate there is still a slip between the impression cylinder and the application roller, and the determination of the print length is made solely on the scope of the Printing cylinder. This has the advantage that with each of the continuously selectable Print lengths get an indelible and thus clean print image becomes.
- the pressure cylinders are driven via a second one, rotatably seated on the shaft of the impression cylinder Central wheel, that with the pressure cylinder gears of all inking units combs.
- the gear drives for driving the application rollers are then preferably each formed by an intermediate gear on the freewheel the shaft of the impression cylinder sits and on the one hand with the on the shaft of the Counter pressure cylinder fixed central wheel and on the other hand with the application roller gear combs.
- This intermediate gear preferably has the same Pitch circle and the same number of teeth as the pressure cylinder gear.
- a change in the printing length can be done in this embodiment accomplish in a particularly rational manner by simply the impression cylinders together with the respective impression cylinder gear and idler gear can be replaced. Because the above Gears sit on the shaft of the impression cylinder, they form together with the printing cylinder is a unit that is easy to change when changing the printing cylinder can handle.
- the compensation takes place the center distances by a corresponding profile shift in the Printing cylinder gear and the intermediate gear.
- This will build up the transmission unit further simplified since the two central wheels are not need to be coupled together by a differential gear.
- This Construction thus enables a more compact construction of the gear unit, a reduction in weight and a reduction in moment of inertia of the masses to be driven, which in turn means the energy losses, reduces wear and noise.
- the two central wheels and the associated gear trains independently drive each other at any desired speed.
- the inking unit 12 has an impression cylinder 14 and an application roller 16.
- the printing cylinder has a cylindrical core 18, on the circumference of which a pressure plate 20 is stretched, the outer surface of which the desired print image appropriate cliché forms and the effective diameter as well as the effective The circumference of the printing cylinder is determined.
- the impression cylinder 10, the impression cylinder 14 and the application roller 16 stand together in their operating position with their outer surfaces in contact and rotate at their same circumferential speeds respective axes.
- the application roller 16 provided with a cell grid but runs with its peripheral surface through the paint chamber of a not shown Chamber doctor and then gives the ink picked up in the process Course of their rotation from the pressure cylinder 14. From the impression cylinder 14, the printing ink in the printing parts on the (not shown) Transfer printing material that wraps around the impression cylinder 10.
- a first central wheel sits on the shaft 22 of the impression cylinder 10 in a rotationally fixed manner 24, which is driven by an electric motor 26.
- Example includes the drive train between the central wheel 24 and the electric motor 26 a gearwheel seated on the output shaft of the electric motor 28 and another gear 30 with the gear 28 and the central gear 24 combs.
- the gear 28 on the circumference of the Central wheel 24 may be arranged so that it meshes directly with the central wheel.
- the gear 30 can be omitted and the electric motor 26 driven in the opposite direction.
- the central gear 24 continues to mesh with a free-running idler gear 32, which is rotatable by means of a bearing 34 on the shaft 36 of the printing cylinder 14 is arranged.
- the intermediate gear 32 in turn meshes with one Applicator roller gear rotatably seated on the shaft 38 of the applicator roller 16 40.
- the pitch circle diameter of the central wheel 24 coincides with the outer diameter of the impression cylinder 10.
- the pitch circle diameter of the idler gear 32 and the outer diameter of the printing cylinder 14 are also agreement between the pitch circle diameter of the idler gear 32 and the outer diameter of the printing cylinder 14 and between the The pitch circle diameter of the applicator roller gear 40 and the diameter the application roller.
- the electric motor 26 the impression cylinder 10 and the applicator roller 16 driven, the gear ratio by the ratio of the number of teeth of the applicator roller gear 40 and the central wheel 24 is fixed.
- the ratio of the diameter and Circumferences of the application roller 16 and the impression cylinder 10 corresponds this transmission ratio, so that the applicator roller 16 has the same peripheral speed like the impression cylinder 10.
- the ring gears of the two central wheels 24 and 46 identical.
- the ring gear of the pressure cylinder gear 50 is with the Gear ring of the intermediate gear 32 identical.
- the situation therefore also corresponds to the pitch circle diameter of the pressure cylinder gear 50 the diameter of the printing cylinder 14.
- the transmission ratio between the pressure cylinder 14 and the second central wheel 46 is the ratio between the number of teeth on the pressure cylinder gear 50 and the second central gear 46, and the ratio between the circumference of the impression cylinder 14 and the circumference of the impression cylinder 10 corresponds to this gear ratio.
- Circumferential speed of the printing cylinder 14 with the circumferential speeds the application roller 16 and the impression cylinder 10 are identical, if the second central wheel 46 is driven at the same speed as the first central wheel 24.
- the two electric motors 42 and 26 synchronized by an electronic control system 52.
- the circumference of the impression cylinder can 14 certain print lengths only take discrete values because of the circumferential ratio of the impression cylinder and impression cylinder always the quotient must correspond to two integers, namely the ratio of Number of teeth of the pressure cylinder gear 50 and the second central wheel 46.
- the printing cylinder 14 is replaced by a printing cylinder 14 'replaced with another outer diameter, as shown in Figure 2.
- the core 18 of the printing cylinder remains unchanged, and only a pressure plate 20 with a larger thickness is clamped.
- the thickness of the printing plates can optionally be left unchanged be and the core 18 of the impression cylinder can be varied.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Labeling Devices (AREA)
- Pens And Brushes (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Printing Methods (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
- Fig. 1
- eine schematische Darstellung des Antriebssystems einer Flexodruckmaschine; und
- Fig. 2
- eine schematische Darstellung der wesentlichen Teile aus Figur 1 für den Fall, daß die Flexodruckmaschine für eine andere Drucklänge als in Figur 1 eingerichtet ist.
Claims (8)
- Flexodruckmaschine mit einem oder mehreren am Umfang eines gemeinsamen Gegendruckzylinders (10) angeordneten Farbwerken (12), die jeweils einen Druckzylinder (14; 14') und eine Auftragwalze (16) aufweisen und deren Druckzylinder unabhängig vom Gegendruckzylinder antreibbar ist, dadurch gekennzeichnet, daß gleichzeitig jede Auftragwalze (16) über ein Zahnradgetriebe (32, 40; 32') mit festem Übersetzungsverhältnis durch ein fest auf der Welle (22) des Gegendruckzylinders (10) sitzendes Zentralrad (24) antreibbar ist.
- Flexodruckmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Wälzkreisdurchmesser des Zentralrades (24) gleich dem Außendurchmesser des Gegendruckzylinders (10) ist, daß auf der Welle (38) der Auftragwalze (16) drehfest ein Auftragwalzenzahnrad (40) angeordnet ist, dessen Wälzkreisdurchmesser gleich dem Außendurchmesser der Auftragwalze (16) ist, und daß das Zentralrad (24) und das Auftragwalzenzahnrad (40) durch ein Zwischenzahnrad (32;32') miteinander gekoppelt sind.
- Flexodruckmaschine nach Anspruch 2, dadurch gekennzeichnet, daß das Zwischenzahnrad (32;32') freilaufend auf der Welle (36) des Druckzylinders (14; 14') angeordnet ist.
- Flexodruckmaschine nach Anspruch 3, dadurch gekennzeichnet, daß der Druckzylinder (14;14') und das auf seiner Welle (36) sitzende Zwischenzahnrad (32;32') jeweils eine austauschbare Einheit bilden.
- Flexodruckmaschine nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Umfang des Druckzylinders (14') von jedem ganzzahligen Vielfachen von U/Z verschieden ist, wobei U der Umfang des Gegendruckzylinders (10) und Z die Zähnezahl des Zentralrades (24) ist.
- Flexodruckmaschine nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß die Zwischenzahnräder (32; 32') der verschiedenen Einheiten jeweils dieselbe Zähnezahl, jedoch unterschiedliche Profilverschiebungen entsprechend den unterschiedlichen Achsabständen zwischen Druckzylinder (14) und Gegendruckzylinder (10) sowie zwischen Druckzylinder (14) und Auftragwalze (16) aufweisen.
- Flexodruckmaschine nach einem der vorstehenden Ansprüche, mit einem drehbar auf der Welle (22) des Gegendruckzylinders (10) angeordneten zweiten Zentralrad (46), das mit drehfest auf den Wellen (36) der Druckzylinder (14) jedes Farbwerkes (12) angeordneten Druckzylinderzahnrädern (50) kämmt, dadurch gekennzeichnet, daß die beiden Zentralräder (24,46) jeweils durch einen eigenen Elektromotor (26,42) antreibbar sind und daß die Drehzahlen der Elektromotoren durch eine elektronisches Regelsystem (52) auf ein vorgegebenes Drehzahlverhältnis regelbar sind.
- Flexodruckmaschine nach Anspruch 7, dadurch gekennzeichnet, daß das zweite Zentralrad (46) die gleiche Zahnung wie das erste Zentralrad (24) aufweist und daß das Druckzylinderzahnrad (50; 50') jeweils die gleiche Zahnung wie das auf derselben Welle (36) sitzende Zwischenzahnrad (32; 32') aufweist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519141 | 1995-05-30 | ||
DE19519141A DE19519141A1 (de) | 1995-05-30 | 1995-05-30 | Flexodruckmaschine mit variabler Drucklänge |
PCT/EP1996/001452 WO1996038304A1 (de) | 1995-05-30 | 1996-04-03 | Flexodruckmaschine mit variabler drucklänge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0783408A1 EP0783408A1 (de) | 1997-07-16 |
EP0783408B1 true EP0783408B1 (de) | 1998-10-28 |
Family
ID=7762812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96911997A Expired - Lifetime EP0783408B1 (de) | 1995-05-30 | 1996-04-03 | Flexodruckmaschine mit variabler drucklänge |
Country Status (8)
Country | Link |
---|---|
US (1) | US5706725A (de) |
EP (1) | EP0783408B1 (de) |
JP (1) | JPH10503444A (de) |
AT (1) | ATE172668T1 (de) |
DE (2) | DE19519141A1 (de) |
DK (1) | DK0783408T3 (de) |
ES (1) | ES2124632T3 (de) |
WO (1) | WO1996038304A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19732330C2 (de) * | 1997-07-28 | 2001-04-19 | Koenig & Bauer Ag | Antrieb für eine Druckeinheit |
CA2224762A1 (en) * | 1998-01-23 | 1999-07-23 | Bob Erbstein | Variable cutoff press unit |
US6220157B1 (en) | 1999-03-23 | 2001-04-24 | Paper Converting Machine Company | Printing press with in-line central impression cylinders |
US6070529A (en) * | 1999-03-31 | 2000-06-06 | Stevens International, Inc. | Printing press with registration control |
DE10046374B4 (de) * | 2000-09-20 | 2014-05-15 | Koenig & Bauer Aktiengesellschaft | Verfahren zum Betreiben einer Druckeinheit |
DE10113338B4 (de) * | 2001-03-20 | 2004-10-28 | Koenig & Bauer Ag | Verfahren und Vorrichtungen zum Antrieb einer Druckeinheit |
DE10154838A1 (de) * | 2001-11-08 | 2003-05-22 | Koenig & Bauer Ag | Antrieb eines Druckwerks |
ATE555907T1 (de) | 2001-03-26 | 2012-05-15 | Koenig & Bauer Ag | Druckwerk einer druckmaschine |
US7086330B2 (en) | 2001-11-08 | 2006-08-08 | Koenig & Bauer Aktiengesellschaft | Drive of a printing group |
US7055428B2 (en) * | 2002-04-11 | 2006-06-06 | Koenig & Bauer Aktiengesellschaft | Characterization, determination of a characteristic number and selection of suitable dressings on cylinders of a printing press |
DE102006003013B4 (de) * | 2005-06-17 | 2011-03-03 | Koenig & Bauer Aktiengesellschaft | Flexodruckmaschine |
DE102013109851A1 (de) * | 2013-09-09 | 2015-03-12 | Windmöller & Hölscher Kg | Verfahren für die Kontrolle der Rotationsgeschwindigkeit für eine Antriebsvorrichtung einer Druckwalze |
US20150328880A1 (en) * | 2014-05-19 | 2015-11-19 | Matthias Hermann Regelsberger | Drive gears providing improved registration in printing cylinder systems |
US20150328879A1 (en) * | 2014-05-19 | 2015-11-19 | Matthias Hermann Regelsberger | Precision registration in printing cylinder systems |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3336792A1 (de) * | 1983-08-29 | 1985-03-14 | Windmöller & Hölscher, 4540 Lengerich | Verfahren und vorrichtung zum regeln des passerhaltigen und drucklaengengerechten drucks in flexodruckmaschinen |
EP0459098A1 (de) * | 1990-05-29 | 1991-12-04 | WindmÀ¶ller & Hölscher | Druckmaschine, vorzugsweise Flexodruckmaschine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2128343A (en) * | 1936-04-10 | 1938-08-30 | Bemis Bro Bag Co | Method of and apparatus for printing |
US2170286A (en) * | 1936-05-08 | 1939-08-22 | Hintze Harry | Textile printing machine |
US2869459A (en) * | 1953-04-24 | 1959-01-20 | Kleinewefers Soehne J | Drive for printing rollers of printing machines |
US3163109A (en) * | 1963-01-21 | 1964-12-29 | Faustel Inc | Interchangeable gear drive means for rotary printing mechanism |
JPS61182951A (ja) * | 1985-02-12 | 1986-08-15 | Tokyo Kikai Seisakusho:Kk | オフセツト輪転印刷機 |
IT1234647B (it) * | 1989-06-02 | 1992-05-26 | Uteco Flexo & Converting Machi | Macchina flexografica a piu' colori con dispositivo per il carico e lo scarico automatico dei cilindri portacliche' |
DE3922559C2 (de) * | 1989-07-08 | 1994-03-24 | Roland Man Druckmasch | Offsetdruckwerk |
EP0498012A1 (de) * | 1991-02-07 | 1992-08-12 | FISCHER & KRECKE GMBH & CO. KG | Flexodruckmaschine mit Wechselspur-Hilfszahnrad |
GB2283939A (en) * | 1993-11-16 | 1995-05-24 | Cobden Chadwick | Printing machine motor drives |
DE4344365C2 (de) * | 1993-12-24 | 1997-09-18 | Koenig & Bauer Albert Ag | Druckwerk für eine Rotationsdruckmaschine |
-
1995
- 1995-05-30 DE DE19519141A patent/DE19519141A1/de not_active Withdrawn
-
1996
- 1996-04-03 US US08/750,889 patent/US5706725A/en not_active Expired - Fee Related
- 1996-04-03 DE DE59600734T patent/DE59600734D1/de not_active Expired - Fee Related
- 1996-04-03 AT AT96911997T patent/ATE172668T1/de not_active IP Right Cessation
- 1996-04-03 DK DK96911997T patent/DK0783408T3/da active
- 1996-04-03 WO PCT/EP1996/001452 patent/WO1996038304A1/de active IP Right Grant
- 1996-04-03 ES ES96911997T patent/ES2124632T3/es not_active Expired - Lifetime
- 1996-04-03 JP JP8536126A patent/JPH10503444A/ja active Pending
- 1996-04-03 EP EP96911997A patent/EP0783408B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3336792A1 (de) * | 1983-08-29 | 1985-03-14 | Windmöller & Hölscher, 4540 Lengerich | Verfahren und vorrichtung zum regeln des passerhaltigen und drucklaengengerechten drucks in flexodruckmaschinen |
EP0459098A1 (de) * | 1990-05-29 | 1991-12-04 | WindmÀ¶ller & Hölscher | Druckmaschine, vorzugsweise Flexodruckmaschine |
Also Published As
Publication number | Publication date |
---|---|
WO1996038304A1 (de) | 1996-12-05 |
DK0783408T3 (da) | 1999-07-05 |
ATE172668T1 (de) | 1998-11-15 |
DE59600734D1 (de) | 1998-12-03 |
US5706725A (en) | 1998-01-13 |
JPH10503444A (ja) | 1998-03-31 |
ES2124632T3 (es) | 1999-02-01 |
DE19519141A1 (de) | 1996-12-05 |
EP0783408A1 (de) | 1997-07-16 |
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