EP0498012A1 - Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement - Google Patents

Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement Download PDF

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Publication number
EP0498012A1
EP0498012A1 EP91101686A EP91101686A EP0498012A1 EP 0498012 A1 EP0498012 A1 EP 0498012A1 EP 91101686 A EP91101686 A EP 91101686A EP 91101686 A EP91101686 A EP 91101686A EP 0498012 A1 EP0498012 A1 EP 0498012A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary
gear
printing machine
flexographic printing
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91101686A
Other languages
German (de)
English (en)
Inventor
Christoph Prof. Dr. Hars
Klaus Schirrich
Bodo Steinmeier
Ottomar Tessmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to EP91101686A priority Critical patent/EP0498012A1/fr
Publication of EP0498012A1 publication Critical patent/EP0498012A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a flexographic printing press, in particular a single-cylinder flexographic printing press, with a plurality of printing units, with a central gear wheel which is rigidly coupled to the axis of a counter-pressure cylinder, is driven together with the latter via a main drive and drives a plurality of printing cylinders via its outer ring gear.
  • the invention has for its object to improve a flexographic printing machine of the type mentioned so that individual printing units can be exchanged during the processing of a print job, that is, during production, for example when a partial change of motif, a change of inscriptions and the like is desired.
  • a flexographic printing machine of the type defined at the outset is characterized according to the invention in that it is coaxial with the central gearwheel lying in a main drive track and is independent an auxiliary gearwheel of an auxiliary drive track with the same number of teeth, toothing and toothing direction as the central gearwheel is drivable by this and that the pressure cylinder gearwheels driven by the central gearwheel are axially displaceable in such a way that either individually or jointly they either mesh with the central gearwheel or mesh with the auxiliary gearwheel.
  • the main gear (main drive gear) is positively mounted on the free shaft journal of the axis of the impression cylinder; it drives the pressure cylinders of the several - e.g. B. six or eight - printing units.
  • a second independently rotatable toothed wheel with the same toothing is attached to the outside of the machine, which is referred to below as "auxiliary toothed wheel”.
  • the gap between the auxiliary gear and the central gear is smaller than the width of a pressure cylinder drive gear.
  • a separate drive is provided for this separate auxiliary drive track, in which the auxiliary gear lies, which can be operated independently of the main drive of the printing press and thus independently of the main drive of the impression cylinder and the printing units.
  • this auxiliary drive can be stopped independently of the main drive and, on the other hand, can be brought up to a synchronous speed with the central gear for all machine speeds.
  • a computer-aided control for the auxiliary drive for the implementation of which both the central and the auxiliary gearwheel are coupled in a rotationally fixed manner with an incremental counter, the auxiliary gearwheel can be synchronized exactly with the central gearwheel and in a predetermined tooth position with the help of the controlled auxiliary drive.
  • a correct relative tooth position of the auxiliary gear to the central gear is given when the toothing of the auxiliary gear is aligned with the toothing of the central gear, so that, for. B.
  • the impression cylinder gears of the printing units which are in engagement are with the central gear and for the purpose of a longitudinal register adjustment on the shaft journal of the pressure cylinder are longitudinally displaceable, can be brought directly into mesh with the auxiliary track or the auxiliary gear beyond the outside of the machine side of the central gear.
  • the central gearwheel and the auxiliary gearwheel are mechanically locked together in a specific tooth position.
  • a second pinion which meshes with the auxiliary gear and has the same number of teeth as the drive pinion for the central gear, is non-rotatably coupled to the latter after the tooth-aligned and correct synchronization has been achieved via a continuously variable clutch.
  • the printing units that are not or not yet used during a current print job are converted in accordance with the desired addition or change and, after completion of the conversion, are brought into meshing engagement with the auxiliary gearwheel. If several printing units are converted at the same time, they should preferably be inserted into the tooth mesh with the auxiliary gear wheel in accordance with each other. If all of the printing cylinders that are not involved in the ongoing printing process, but are intended to supplement or replace them, are in a tooth engagement with the auxiliary drive track that conforms to the fit, then this is raised via the separate drive to synchronous speed with the running main drive track and with the help of a controller into one with the current production register position run with aligned teeth between the main drive level and the auxiliary drive level. Once this related running condition has been reached, the pressure cylinder gears of the pressure cylinders to be switched on are moved into meshing engagement with the central gear via the longitudinal register adjustment.
  • printing cylinders of a running production can be moved with their printing cylinder gearwheels into engagement with the auxiliary drive track via the longitudinal register.
  • the drive gears of the anilox rollers are to be widened by the same amount so that a single impression cylinder gear, which meshes with the auxiliary drive track, can drive the associated anilox roller and thus the corresponding inking unit analogously to the conventional drive method.
  • the anilox rollers and thus the inking units are driven in the printing state via a drive gearwheel which meshes with the printing cylinder gear and is seated on the shaft journal of the relevant anilox roller via an interposed freewheel, the pitch circle diameter of which corresponds to the diameter of the anilox roller.
  • the intermediate freewheel is used so that the anilox roller can rotate faster than its assigned printing unit drive gear.
  • the printing units which are via the auxiliary drive track are to be switched off or switched off for the connection or disconnection process in the printing position so that these printing units are not involved in the printing and consequently do not cause any waste.
  • the conventional single-cylinder flexographic printing machine shown in FIG. 1 comprises a frame 1 which receives a rotatably mounted impression cylinder 2, around which the printing units 3a, b, c, d, e and f are mounted.
  • the stamp-like clichés are mounted on the printing or plate cylinders 4a, b, c, d, e, f.
  • the six inking units 5a, b, c, d, e, f are also shown - each equipped with an inking roller 6a, b, c, d, e, f and a doctor blade system 7a, b, indicated in the form of a so-called chamber doctor blade.
  • a material web 8 to be printed runs from above over a deflection roller 9 onto the impression cylinder 2 and becomes due to having passed the last printing unit 3f of the still damp printing ink, without bringing the printed side into contact with a web guide roller, tangentially away from the impression cylinder 2.
  • FIG. 2A shows the partial view of a single-cylinder flexographic printing machine with features according to the invention.
  • the counter-pressure cylinder 2 is mounted on the drive and operator side in the two side parts of the frame 1 and its axis 10 rigidly coupled to it is extended on the drive side by the shaft journal 11, onto which a so-called central gearwheel 12 located in the main drive track H is rotatably connected via a key 13 is.
  • the impression cylinder 2 is mounted with bearings 20 in the side parts of the frame 1.
  • a pressure cylinder gear 14 engages in the central gear 12, which sits axially displaceably on the shaft journal 15 of a pressure cylinder 4 (shown only once).
  • the pressure cylinder gear 14 has an adjusting collar 16, on which a sliding claw 17 acts, which in turn is part of a longitudinal register adjustment which is not shown in detail because it is known in principle.
  • the pressure cylinder 4 is mounted in bearings 18.
  • a drive gear 35 which engages in the pressure cylinder gear 14 and in a manner known per se, is axially fixed on the shaft journal of one of the ink application rollers 6 (also shown only once), which is mounted on the two side parts of the frame 1 with bearings 34 in inking units 5
  • the drive of the inking roller 6 is provided via a freewheel, not shown in the operating state of the printing press, and the toothing width of which covers the drive tracks H and Z of the central gear 12 and an auxiliary gear 22, the function of which is explained in more detail below.
  • a drive pinion 19 engages in the central wheel 12, which is driven directly by its own drive motor 21 (FIG. 2A) or with the interposition of a switchable clutch 27 and a transmission 26 (FIG. 2C) by one not shown Main
  • a single-cylinder flexographic printing machine is particularly characterized by the auxiliary gear 22, which is freely rotatably mounted via bearings 23 and is arranged coaxially to the central gear 12 and is located in an auxiliary drive track Z, for which a separate drive via a pinion 24 and an auxiliary drive motor 25 is provided.
  • Pinion 24 and auxiliary drive motor 25 are attached to the drive pinion 19 on the circumference of the impression cylinder 2 and are therefore shown separately in FIG. 2B.
  • the width of the ring gear of the auxiliary gear 22 can be narrower than the width of the ring gear of the central gear 12, because the central gear 12 must be wider than the pressure cylinder gear 14 by the amount of the axial displacement required for longitudinal register adjustment, while for the gear ring of the auxiliary gear 22 a width is sufficient, which corresponds to the ring gear width of a pressure cylinder gear 14.
  • a pressure cylinder gear 14 (see FIG. 2D) can now mesh with the auxiliary gear 22 and, after the rotational speed is identical and tooth alignments are established between the central gear 12 and the auxiliary gear 22, with the aid of a sliding claw 17 of the longitudinal register adjustment device (not shown), which in turn opens an adjusting collar 16 of the impression cylinder gear 14 acts to be moved axially on the axis 15 of the impression cylinder from the auxiliary drive track Z in meshing engagement with the central gear 12 in the main drive track H.
  • the fixed coupling of both the central gear 12 and the auxiliary gear 22, each with an incremental counter 28 (FIG. 2A) or 30 (FIG. 2C) or 29 (FIGS. 2B and 2E), can also advantageously be carried out using a small auxiliary pinion (not shown) ) take place, both of the same number of teeth, which is also an integral part of the number of teeth of the central gear 12 and the auxiliary gear 22 and of which one meshes with the central gear 12 and the other with the auxiliary gear 22.
  • the two drive pinions 19 and 24 for the central gear 12 on the one hand and the auxiliary gear 22 on the other hand can also serve, as shown in the drawings.
  • both incremental counters 28, 29 and 30 deliver an equal number of pulses per angle of rotation of the gears 12 and 22 of the same size and provided with the same number of teeth a maintainable relative tooth position of said gears in running condition, d. H. of the central gear 12 and the auxiliary gear 22, possible to each other.
  • FIG. 2E shows the auxiliary drive 25 for the pinion 24, which drives the auxiliary gearwheel 22, which is extended by an axially displaceable auxiliary pinion 31.
  • This additional pinion 31 can be brought into meshing engagement with the central gear 12 and via an axial displacement device 33, which acts with a sliding claw 33 on an adjusting collar 32 on the additional pinion 31, the additional pinion 31 can be shifted into an externally predetermined axial position with which one certain relative position of the teeth of the two gears 12 and 22 can be achieved. If this relative position is chosen so that the teeth of the central gear 12 are slightly behind those of the auxiliary gear, the insertion of the pressure cylinder gear 14 into the tooth engagement with the central gear 12 is facilitated. Conversely, if the auxiliary gear 22 is a fraction of a tooth pitch behind the central gear 12, the displacement of a pressure cylinder gear 14 from the engagement with the central gear 12 into engagement with the auxiliary gear 22 is facilitated.
  • the aforementioned incremental counters 28 and 30 and 29 can only be attached coaxially with the associated drive pinions 19 and 24 or can be linked to the rotation of the central gear 12 in the main drive track H or to the rotation of the auxiliary gear via the auxiliary pinions (not shown) mentioned 22 in the plane of the auxiliary drive track Z.
  • the invention described for a single-cylinder flexographic printing stand can also be used very expediently for tandem machines with two- and multi-color printing stands, with all the printing stands then advantageously being equipped with the auxiliary drive track Z mentioned. Then even format changes can be carried out almost without machine downtime and production stoppage, which is basically also possible with a single-column multi-color flexographic printing press, provided the total number of format-bound printing cylinders is smaller than the total number of printing units of the respective printing press.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP91101686A 1991-02-07 1991-02-07 Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement Withdrawn EP0498012A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP91101686A EP0498012A1 (fr) 1991-02-07 1991-02-07 Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101686A EP0498012A1 (fr) 1991-02-07 1991-02-07 Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement

Publications (1)

Publication Number Publication Date
EP0498012A1 true EP0498012A1 (fr) 1992-08-12

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EP91101686A Withdrawn EP0498012A1 (fr) 1991-02-07 1991-02-07 Machine d'impression flexographique avec engrenage auxiliaire pour changement de voie d'entraînement

Country Status (1)

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EP (1) EP0498012A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615841A1 (fr) * 1993-03-17 1994-09-21 Windmöller & Hölscher Machine d'impression
WO1996038304A1 (fr) * 1995-05-30 1996-12-05 Fischer & Krecke Gmbh & Co. Presse flexographique a longueur d'impression variable
US6038972A (en) * 1998-12-29 2000-03-21 Paper Converting Machine Company Quick change system for a press
US6289811B1 (en) 2000-01-11 2001-09-18 Paper Converting Machine Co. Method and apparatus for sampling and inspecting ink for a printing press
WO2002024458A1 (fr) * 2000-09-20 2002-03-28 Koenig & Bauer Aktiengesellschaft Unite d'impression
DE10046374B4 (de) * 2000-09-20 2014-05-15 Koenig & Bauer Aktiengesellschaft Verfahren zum Betreiben einer Druckeinheit
CN104742513A (zh) * 2013-12-25 2015-07-01 艾美株式会社 印刷机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE424947C (de) * 1925-02-28 1926-02-09 Julius Fischer Fa Walzendruckmaschine fuer festen oder losen Rapport
DE543756C (de) * 1926-10-02 1932-02-11 Julius Fischer Fa Musterwalzenantrieb fuer Druckmaschinen
CH411936A (de) * 1962-08-03 1966-04-30 Maschf Augsburg Nuernberg Ag Antriebseinrichtung für Druckzylinder von Rotationsdruckmaschinen
DE3407251A1 (de) * 1983-02-28 1984-08-30 Ryobi Ltd., Fuchu, Hiroshima Handrad-vorrichtung fuer eine druckmaschine
DE3344131A1 (de) * 1983-12-07 1985-06-20 Metronic Gerätebau GmbH & Co, 8702 Veitshöchheim Flexodruckwerk fuer den verpackungsdruck
EP0325445A2 (fr) * 1988-01-22 1989-07-26 Cobden Chadwick Limited Machines d'impression

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE424947C (de) * 1925-02-28 1926-02-09 Julius Fischer Fa Walzendruckmaschine fuer festen oder losen Rapport
DE543756C (de) * 1926-10-02 1932-02-11 Julius Fischer Fa Musterwalzenantrieb fuer Druckmaschinen
CH411936A (de) * 1962-08-03 1966-04-30 Maschf Augsburg Nuernberg Ag Antriebseinrichtung für Druckzylinder von Rotationsdruckmaschinen
DE3407251A1 (de) * 1983-02-28 1984-08-30 Ryobi Ltd., Fuchu, Hiroshima Handrad-vorrichtung fuer eine druckmaschine
DE3344131A1 (de) * 1983-12-07 1985-06-20 Metronic Gerätebau GmbH & Co, 8702 Veitshöchheim Flexodruckwerk fuer den verpackungsdruck
EP0325445A2 (fr) * 1988-01-22 1989-07-26 Cobden Chadwick Limited Machines d'impression

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615841A1 (fr) * 1993-03-17 1994-09-21 Windmöller & Hölscher Machine d'impression
WO1996038304A1 (fr) * 1995-05-30 1996-12-05 Fischer & Krecke Gmbh & Co. Presse flexographique a longueur d'impression variable
US5706725A (en) * 1995-05-30 1998-01-13 Fischer & Krecke Gmbh & Co. Flexographic printing press with variable printing length
US6038972A (en) * 1998-12-29 2000-03-21 Paper Converting Machine Company Quick change system for a press
US6289811B1 (en) 2000-01-11 2001-09-18 Paper Converting Machine Co. Method and apparatus for sampling and inspecting ink for a printing press
WO2002024458A1 (fr) * 2000-09-20 2002-03-28 Koenig & Bauer Aktiengesellschaft Unite d'impression
US6736060B2 (en) 2000-09-20 2004-05-18 Koenig & Bauer Aktiengesellschaft Printing unit
DE10046374B4 (de) * 2000-09-20 2014-05-15 Koenig & Bauer Aktiengesellschaft Verfahren zum Betreiben einer Druckeinheit
CN104742513A (zh) * 2013-12-25 2015-07-01 艾美株式会社 印刷机
EP2902200A1 (fr) * 2013-12-25 2015-08-05 I. Mer Co., Ltd. Appareil d'impression
RU2672024C2 (ru) * 2013-12-25 2018-11-08 Ай. МЕР КО., ЛТД Печатающее устройство

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