EP0290850A1 - Machine d'impression flexographique, en particulier pour l'impression d'un fond - Google Patents

Machine d'impression flexographique, en particulier pour l'impression d'un fond Download PDF

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Publication number
EP0290850A1
EP0290850A1 EP88106599A EP88106599A EP0290850A1 EP 0290850 A1 EP0290850 A1 EP 0290850A1 EP 88106599 A EP88106599 A EP 88106599A EP 88106599 A EP88106599 A EP 88106599A EP 0290850 A1 EP0290850 A1 EP 0290850A1
Authority
EP
European Patent Office
Prior art keywords
printing
roller
anilox
cylinder
flexographic printing
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
Application number
EP88106599A
Other languages
German (de)
English (en)
Other versions
EP0290850B1 (fr
Inventor
Peter Lauber
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.)
Conprinta Ltd
Original Assignee
Conprinta Ltd
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 Conprinta Ltd filed Critical Conprinta Ltd
Priority to AT88106599T priority Critical patent/ATE68131T1/de
Publication of EP0290850A1 publication Critical patent/EP0290850A1/fr
Application granted granted Critical
Publication of EP0290850B1 publication Critical patent/EP0290850B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/007—Use of printing belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B41F31/301—Devices for tripping and adjusting form rollers

Definitions

  • the invention relates to a flexographic printing machine, in particular for flexographic printing, which has at least one printing unit, each with a printing cylinder or an endless printing belt, which is wound around a support cylinder and a tensioning roller, an impression cylinder, an anilox roller which transfers the ink to the printing cylinder or to the printing belt and a color dryer and a paper web that runs through all printing units, via deflection roller (s) and drawing roller (s) between the printing cylinder or printing belt and impression cylinder and through the ink dryer.
  • FIG. 1 A dimensionally stable endless belt 11 is mounted on a support cylinder 12 and a tension roller 14. Flexible pressure plates 16 are fastened on the outside of this endless belt, whereby a pressure belt 10 is formed.
  • the printing ink is transferred from an anilox roller 18, which is immersed in an ink bath (not shown), to the printing plates 16. Redundant paint is created by a rake in the form of a reverse angle kel 20 stripped.
  • a paper web 22 guided in the direction of the arrow is pressed by an impression cylinder 24 onto the printing plates and printed on one side.
  • the endless tape 11 serving as a carrier consists of a polyester film, for example approximately 0.25 mm thick, in particular of polyethylene terephthalate.
  • the physical properties of the transverse and longitudinally stretched film material are the same in all directions. The uniformity extends over a wide temperature and humidity range.
  • the film-shaped tape material has good elongation and high impact resistance in the transverse and longitudinal directions.
  • the flexible film material of the endless belt is chemically resistant and resists oils, greases, printing inks, etc.
  • the long sides of the endless belt 11 are provided with a perforation 26, which is penetrated by knobs of the spiked discs transporting the belt in a known manner. This prevents the printing tape from sliding on the rollers.
  • the flexible printing plates 16 usually consist of a photopolymer material or rubber and are glued to the endless belt 11 with a suitable adhesive.
  • the printing plates 16 in the present example have a structured surface 28, which generates the printed image.
  • the printing tapes 10 described above have the advantage that the flexible printing plates 16 do not have to be mounted on a printing cylinder, but rather can be glued to the endless tape, which can be easily removed from the flexographic printing machine after use. All used Printing tapes can be rolled onto a sleeve and stored in a space-saving manner.
  • Flexographic prints up to 2.5 m wide are currently being produced with printing tapes up to 4.5 m long.
  • the flexographic printing machines work at high speed and are equipped with control devices for the automatic monitoring and registration of the paper webs.
  • Flexographic printing presses built according to the Conprinta system are usually equipped with 3 - 10 printing units. Any printing unit that is not involved in the ongoing printing process can already be equipped for the next step. The printing tape that is no longer used is removed, the new printing tape is installed and the printing ink is replaced. This usually takes 5-15 minutes.
  • individual printing units can also contain a conventional, structured or unstructured printing cylinder instead of the printing belt. This is done primarily for smooth or textured paintwork or for applying a base color.
  • the inventor has set himself the task of further improving a flexographic printing machine of the type mentioned at the outset and of rationalizing its operation.
  • an anilox roller with an optimal screen should be available for each print, without the need for complex assembly work which impairs the working time of the machine.
  • each printing unit a working anilox roller that can be uncoupled from its drive shaft during the operation of the flexographic printing press and at least one reserve roller that can be automatically exchanged during the set-up time of the printing unit Anilox roller are installed.
  • the additional, automatically replaceable anilox roller (s) can replace the working anilox roller at a suitable moment in a fraction of the time previously required.
  • the roller in reserve or the rollers in reserve advantageously have a different grid than the working roller. It is known to the person skilled in the art that different anilox rollers are preferably used for different printing motifs (surface printing, screen printing). If an order change is imminent, the anilox roller with the halftone value and / or scooping capacity for the ink transfer corresponding to the print motif can be replaced on a free printing unit during the normal set-up time without interrupting the operation of the rest of the printing system.
  • the scooping capacity of an anilox roller depends on the width and depth of the recesses.
  • the working and the reserve anilox roller (s) are preferably mounted in two front swivel arms, which are attached to the machine housing or frame or in a lifting carriage. After a position stop has been removed, these swivel arms can be rotated about a continuous axis or two axes arranged in the region of the swivel arms. After turning, another anilox roller is in the working position and is fixed by means of a position stop. The screen roller that is no longer used can now be cleaned or removed without interrupting the printing process.
  • the working and the anilox roller which are in reserve are mounted on two elongated swivel arms on both sides of the axis / n. These swivel arms can be rotated by at least 180 °, the angle by which an anilox roller is rotated from the working position to the reserve position or vice versa.
  • any equipment in the flexographic printing press that stands in the way of this movement is automatically moved, for example the ink bath with the rack and possibly the tensioning roller when using a printing belt.
  • the printing press is designed in such a way that these steps can be carried out easily.
  • the impediment to the swiveling movement is reduced if the swivel arms with the axis (s) for the anilox rollers can be lowered with the work roll arranged at the top or raised with the work roll arranged below.
  • the system expediently moves simultaneously with the lowering or lifting from a position stop and can only be pivoted after this movement.
  • the flexographic printing machine can be equipped with means which, because of the position stop, delay the automatic rotation of the swivel arms with the axis (s) for the anilox rollers. This can be done, for example, by installing racks and equipping the anilox rollers with rigidly arranged gear wheels. The gears only engage in the teeth when the system has moved out of the position stop.
  • the anilox rollers which are rotatably mounted in the swivel arms, should, if they are in reserve, be easily removed if necessary.
  • the bearing pins of the anilox rollers are therefore preferred by lifting them onto the swivel arms screwable caps exposed.
  • the anilox rollers to be replaced can be lowered onto a trolley or lifted off with a crane.
  • the swivel arms attached to the machine frame or housing or in the lifting carriage are driven on both sides of the end faces of the anilox rollers.
  • the rotary movement of usually 180 is preferably carried out via synchronized electric, pneumatic or hydraulic motors arranged on both sides of the common axis. Where this is possible for geometric reasons, the rotary movement can only take place with a motor and a shaft extending from machine frame to machine frame. In the case of swivel arms arranged on a straight line, however, this requires a greater distance between the anilox rollers, which in turn has the consequence that the equipment objects opposing a rotational movement of the swivel arms must be removed further. For this reason, synchronized motors that are arranged on both sides are generally used in practice.
  • the automatic replacement of an anilox roller which is in reserve can take place via displacement guides.
  • this system is more expensive and complicated than the rotary movements of the swivel arms described above.
  • anilox roller (s) in reserve position can be removed or installed during the printing operation. This allows the business interruptions to be very short when changing the printed motif, especially if printing tapes are used instead of printing cylinders.
  • the printing unit of a flexographic printing machine shown in FIGS. 3 and 4 includes a machine frame 30 with the rollers and cylinders guiding or printing a paper web 22, their suspensions and drive elements, reference being made to FIGS. 1 and 2.
  • the components corresponding to the prior art are not all drawn and described in detail.
  • the paper web 22 is guided via a deflection roller 32 to the rubberized pull roller 34. After the drawing roller 34, the paper web 22 wraps around the impression cylinder 24 and is printed with the ink transferred from the working anilox roller 18a to the printing belt 10 when it passes between the support cylinder 12 and impression cylinder 24.
  • the working anilox roller 18a and the anilox roller 18b which are in reserve, are mounted on two swivel arms 38 located on the end of the anilox rollers, which are mounted in opposite side rails of the machine frame 30, each around an axis of rotation 36 lying in the middle (FIGS ) are rotatable. By rotating the extended swivel arm by 180, the working anilox roller becomes an anilox roller that is in reserve and vice versa.
  • the positioning devices 40 (FIGS. 5, 6, 7) ensure stable holding of the anilox roller 18 a in the working position.
  • the upper part of the swivel arm 38 moves on a rail guide 39 from the positioning stops 40 and can now be rotated through 180 ° by means of a unit that exerts a torque. After lifting and simultaneously moving into the positioning stops 40, the previously anilox roller becomes the new anilox roller 18a.
  • the hydraulic lifting cylinders 48 are used to position the support cylinder 12, the hydraulic pressure cylinders 50 are used to position the pull roller 34.
  • the hydraulic unit 49 is indicated in FIG. 3.
  • the drive units 52 for the tensioning roller 14, 54 for the support cylinder 12 and 56 for the counter-pressure cylinder 24 are of a conventional design familiar to the person skilled in the art, as are the possibly telescopically extendable spindles or shafts for transmitting the torques to the corresponding rollers. 4, the unit 54 does not exert its own driving force, but obtains it via transmission means.
  • the unit 54 drives the support cylinder 12 via a cardan shaft 96, which can absorb movements in all directions.
  • the unit 56 for the impression cylinder 24 is driven via a toothed belt 55, which unit also drives the pull roller 34, which is indicated by dash-dotted lines in FIG. 4.
  • the printing belt 10 and the paper web 22 are driven separately, but they must always run at exactly the same speed.
  • the tension on the pressure belt 10 is changed by the tensioning roller ze is rotated a little faster or slower. In this way, an additional or less torque is exerted on the printing belt.
  • the tensioning roller 14 is suspended via a spindle lifting system 69. As shown in FIG. 4, the height of the tensioning roller 14 is changed by rotating the threaded spindle 61, which passes through the tensioning roller bearing 66.
  • the printing belt 10 and the tension roller 14 with the tension rod are omitted and the support cylinder 12 is designed as a pressure cylinder.
  • Such variants of the printing unit are particularly suitable for primers and smooth or structured coatings.
  • FIG. 5 A system of the rotatable anilox rollers 18a, 18b is shown in detail in FIG. 5.
  • the axis of rotation 36 for the swivel arm 38 with the two anilox rollers merges in the direction of the machine frame into a pin 63 rigidly connected to the swivel arm 38, which in turn is rotatably mounted in a sleeve-shaped holder 65.
  • This holder 65 is anchored in a lifting carriage 67 and also carries the flanged rotary cylinder 60, which is driven by the hydraulic unit 49 shown in FIG. 3.
  • the drive shaft of the rotary cylinder 60 transmits the drive force to the pin 63.
  • a corresponding swivel arm with bearings for the anilox rollers and synchronized means for the drive is arranged on the opposite end of the two anilox rollers 18a, 18b.
  • the bearing pins 62 of the two anilox rollers 18a, 18b are arranged in the extended swivel arm 38 via bearings 64.
  • the roller drive for example an electric servo motor, runs coaxially with the anilox roller 18a.
  • the Roller drive directly from the main drive, e.g. using a toothed belt.
  • a coupling 68 of a known type allows the roll neck 62 to be separated from the drive shaft 70 of the roll drive.
  • the clutch 68 is actuated by a hydraulic cylinder 72 which is supported on a holder 76 via a cylindrical pin 74.
  • the hydraulic cylinder 72 transmits its force to the clutch 68 via a fork joint 78 and an angled lever 80 which can be pivoted about an axis 79.
  • the clutch is designed as a curved tooth clutch.
  • the hydraulic lifting cylinder 44 allows the lifting slide 67 with the swivel arm 38 for the two anilox rollers 18a, 18b to be lowered to a stop by means of the piston rod 90. This is necessary in order to obtain the space necessary for the rotation of the anilox rollers.
  • the position stop 86 is formed with a groove trapezoidal in cross section on the lower side.
  • the caps 94 screwed on the end face to the swivel arm 38 are designed in accordance with the aforementioned trapezoidal groove.
  • the position stop which serves the same purpose and has a rectangular cross section has a mandrel 84.
  • Corresponding recesses are formed in the caps 34, as a bore, longitudinal slot or groove, in which the mandrel 84 can snap into place.
  • the mandrel can be dome-shaped and in the working position with a lock the correspondingly designed bearing shell.
  • the lower cap 94 can be unscrewed and the lower anilox roller 18b (FIG. 5) can be replaced.
  • the flexographic printing machine according to the invention is particularly suitable for the production of large-area multicolor prints.
  • the resulting flexographic printing process is extremely economical.
  • a paper web used as a cover sheet for packaging cardboard is printed.
EP88106599A 1987-05-07 1988-04-25 Machine d'impression flexographique, en particulier pour l'impression d'un fond Expired - Lifetime EP0290850B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106599T ATE68131T1 (de) 1987-05-07 1988-04-25 Flexodruckmaschine, insbesondere fuer den flexovordruck.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH174187 1987-05-07
CH1741/87 1987-05-07

Publications (2)

Publication Number Publication Date
EP0290850A1 true EP0290850A1 (fr) 1988-11-17
EP0290850B1 EP0290850B1 (fr) 1991-10-09

Family

ID=4217495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106599A Expired - Lifetime EP0290850B1 (fr) 1987-05-07 1988-04-25 Machine d'impression flexographique, en particulier pour l'impression d'un fond

Country Status (7)

Country Link
US (1) US5003873A (fr)
EP (1) EP0290850B1 (fr)
JP (1) JPS6438236A (fr)
AT (1) ATE68131T1 (fr)
CA (1) CA1298137C (fr)
DE (1) DE3865354D1 (fr)
ES (1) ES2027339T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454010A1 (fr) * 1990-04-26 1991-10-30 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Moyen pour entraîner les rouleaux d'un système d'encrage
EP0468655A1 (fr) * 1990-07-23 1992-01-29 Ward Holding Company, Inc. Système à rouleaux encreurs multiples pour stations d'impression flexographique
EP0623464A1 (fr) * 1993-05-07 1994-11-09 ARNOLDO MONDADORI EDITORE S.p.A. Machine d'impression flexographique à bobines à haute vitesse
DE19604429A1 (de) * 1995-02-09 1996-08-14 Japan Radio Co Ltd Freigabevorrichtung zur Verwendung bei einer Behandlungswalze einer Druckmaschine
EP0826499A2 (fr) * 1996-08-30 1998-03-04 Gregson, Dominic Machine d'impression en ligne et à bande sans fin
DE29801017U1 (de) * 1998-01-23 1998-03-05 Roland Man Druckmasch Beschichtungseinheit für eine Druckmaschine und Hochdruckplatte
DE102008034248A1 (de) * 2008-07-23 2010-01-28 Manroland Ag Verfahren zum Betreiben einer Druckmaschine
WO2015117807A1 (fr) * 2014-02-05 2015-08-13 CONPRINTA GmbH & Co. KG Groupe d'impression pour machine de flexographie
DE102017210170A1 (de) * 2017-06-19 2018-12-20 Heidelberger Druckmaschinen Ag Rotationstiefdruckwerk mit Zugwalze

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410132C2 (de) * 1994-03-24 1996-07-25 Thimm Verpackung Gmbh & Co Flexodruckmaschine, insbesondere für Mehrfarbendruck
NL1009274C2 (nl) * 1998-05-28 1999-12-03 Av Flexologic Bv Flexibele drager voor drukplaat.
GB2345465B (en) * 1998-09-22 2002-11-06 Euramex Packaging Ltd In-line belt type printing apparatus
US6910353B2 (en) 2002-11-27 2005-06-28 Milliken & Company Printed loop fabric and method for producing the same
US7325421B2 (en) * 2002-11-27 2008-02-05 Sasser Michael P Printed loop fabric and method for producing the same
DE10300502A1 (de) * 2003-01-08 2004-07-29 Rosenberg Gmbh & Co Druckmaschine und Verfahren zum Bedrucken einer Druckbahn
US7202008B2 (en) * 2005-06-23 2007-04-10 Roshelli Jr Albert Thermal development system and method of using the same
DE102008016598B4 (de) * 2008-04-01 2012-08-30 Koenig & Bauer Aktiengesellschaft Druckwerk/Lackierwerk einer Druckmaschine mit einer Vorrichtung zum Austausch von Rasterwalzen
US20100092743A1 (en) * 2008-10-10 2010-04-15 Alrick Vincent Warner Absorbent fibrous web substrates having distinct graphics and method for printing substrates
KR101386092B1 (ko) * 2012-12-20 2014-04-16 신철근 거품제거장치용 흡입유닛
CN103481640B (zh) * 2013-09-30 2015-06-10 西安秦华机械有限责任公司 一种机组式印刷机的履带式印版机构及其换版方法
CN104875475A (zh) * 2015-05-27 2015-09-02 杭州项淮机械科技有限公司 柔性树脂版印刷机构、柔性印刷装置及柔性调节印刷方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140205B (de) * 1960-07-19 1962-11-29 Kurt Petzold Farbwerk fuer Druckmaschinen
DE2139834C2 (de) * 1971-08-09 1975-12-18 Windmoeller & Hoelscher, 4540 Lengerich Von Tiefdruck auf Flexodruck und umgekehrt umrüstbares Druckwerk für Druckmaschinen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56109763A (en) * 1980-02-02 1981-08-31 Isowa Ind Co Printing press for corrugated board sheet for instance
US4528907A (en) * 1984-06-22 1985-07-16 Norwood Marking & Equipment Co., Inc. Print head with dual exchangeable hot inking rolls

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140205B (de) * 1960-07-19 1962-11-29 Kurt Petzold Farbwerk fuer Druckmaschinen
DE2139834C2 (de) * 1971-08-09 1975-12-18 Windmoeller & Hoelscher, 4540 Lengerich Von Tiefdruck auf Flexodruck und umgekehrt umrüstbares Druckwerk für Druckmaschinen

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454010A1 (fr) * 1990-04-26 1991-10-30 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Moyen pour entraîner les rouleaux d'un système d'encrage
EP0468655A1 (fr) * 1990-07-23 1992-01-29 Ward Holding Company, Inc. Système à rouleaux encreurs multiples pour stations d'impression flexographique
EP0623464A1 (fr) * 1993-05-07 1994-11-09 ARNOLDO MONDADORI EDITORE S.p.A. Machine d'impression flexographique à bobines à haute vitesse
US5413041A (en) * 1993-05-07 1995-05-09 Arnoldo Mondadori Editore S.P.A. High-speed web-fed flexographic printer
DE19604429A1 (de) * 1995-02-09 1996-08-14 Japan Radio Co Ltd Freigabevorrichtung zur Verwendung bei einer Behandlungswalze einer Druckmaschine
EP0826499A2 (fr) * 1996-08-30 1998-03-04 Gregson, Dominic Machine d'impression en ligne et à bande sans fin
EP0826499A3 (fr) * 1996-08-30 1998-03-18 Gregson, Dominic Machine d'impression en ligne et à bande sans fin
DE29801017U1 (de) * 1998-01-23 1998-03-05 Roland Man Druckmasch Beschichtungseinheit für eine Druckmaschine und Hochdruckplatte
DE102008034248A1 (de) * 2008-07-23 2010-01-28 Manroland Ag Verfahren zum Betreiben einer Druckmaschine
DE102008034248B4 (de) 2008-07-23 2023-02-02 manroland sheetfed GmbH Verfahren zum Betreiben einer Druckmaschine
WO2015117807A1 (fr) * 2014-02-05 2015-08-13 CONPRINTA GmbH & Co. KG Groupe d'impression pour machine de flexographie
DE102017210170A1 (de) * 2017-06-19 2018-12-20 Heidelberger Druckmaschinen Ag Rotationstiefdruckwerk mit Zugwalze

Also Published As

Publication number Publication date
US5003873A (en) 1991-04-02
JPS6438236A (en) 1989-02-08
CA1298137C (fr) 1992-03-31
ES2027339T3 (es) 1992-06-01
EP0290850B1 (fr) 1991-10-09
DE3865354D1 (de) 1991-11-14
ATE68131T1 (de) 1991-10-15

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