EP1215046A1 - Machine à imprimer avec un dispositif de nettoyage du cliché - Google Patents

Machine à imprimer avec un dispositif de nettoyage du cliché Download PDF

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Publication number
EP1215046A1
EP1215046A1 EP00127118A EP00127118A EP1215046A1 EP 1215046 A1 EP1215046 A1 EP 1215046A1 EP 00127118 A EP00127118 A EP 00127118A EP 00127118 A EP00127118 A EP 00127118A EP 1215046 A1 EP1215046 A1 EP 1215046A1
Authority
EP
European Patent Office
Prior art keywords
printing
brush
cylinder
printing cylinder
cleaning
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Withdrawn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
EP00127118A
Other languages
German (de)
English (en)
Inventor
Wilfried Kolbe
Manfred Terstegen
Klaus Schirrich
Wolfgang Brunsdeilins
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 EP00127118A priority Critical patent/EP1215046A1/fr
Publication of EP1215046A1 publication Critical patent/EP1215046A1/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Withdrawn legal-status Critical Current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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/23—Brushes

Definitions

  • the invention relates to a printing press with a rotatably drivable printing cylinder and a cleaning device for clamped on the impression cylinder Clichés.
  • a printing press for example a flexographic printing press
  • the dirt is particularly deposited on the edges the raised, printing parts of the clichés.
  • Print patterns for example in very small print letters Typeface or raster images with a fine dot grid can be deeper lying, non-printing parts of the clichés increase with increasing Slightly add dirt build-up so that the quality of the printed image is impaired becomes.
  • EP-A-0 646 458 is a printing press with a washing device for the Clichés known.
  • the washing device is formed by spray nozzles, with where liquid is sprayed onto the clichés. Such a washing process can only be used if the press is out of operation for a longer period be performed.
  • the object of the invention is to provide a printing press with which a maintains high print quality without sacrificing productivity Printing machine is significantly affected.
  • This brush can be brought into the effective position very quickly it is turned on the impression cylinder, and it can be done after Pull the clichés back into an ineffective position just as quickly.
  • the cleaning of the clichés also the time in which the adhesive seam is used at the printing station. Because during this phase of operation the pressure cylinder rotates, the clichés on the entire circumference of the printing cylinder clean with a single brush. Since the part of the printing material web, the the adhesive seam contains, is anyway unusable, can be a possible impairment of the printed image accepted by the effect of the cleaning brush become.
  • the invention thus also relates to a process for cleaning the clichés, where the cleaning brushes during a roll change and, more specifically, during the operating phase, in which the adhesive seam of the printing material web passes through at the printing station, against which the printing cylinder is set, and a Process in which the cleaning brush is in use during printing is turned on the pressure cylinder.
  • the position at which the cleaning brush is located is employed on the pressure cylinder, in the direction of rotation of the Printing cylinder between the printing position at which the clichés change their color hand over the substrate and the ink application position at which the clichés can be colored by an inking roller or anilox roller.
  • the cleaning position is in the direction of rotation the printing cylinder between the inking position and the printing position.
  • the raised and inked parts the clichés brushed over by the bristles of the cleaning brush.
  • the effect of the cleaning brush is essentially in that the contaminants that are on the edges of the printing parts deposit the clichés, blasted off with the bristles of the cleaning brush and be flung away.
  • the cleaning effect is still in this case supported by the fact that the clichés with the solvent-based printing ink are moistened.
  • brush in the sense of the invention is not actually a brush Senses, that is, an organ equipped with bristles, limited, but embraced also “brushes”, which replace bristle cleaning organs in the mold from soft cloths, rags or threads or in the form of a layer Wear spongy material.
  • the brush which expediently extends over the entire width of the printing cylinder extends, it can be a fixed brush, which in the position held remains stationary. The brush effect then comes in that the pressure cylinder moves past the brush.
  • the brush is designed as a round brush. In this case it is possible to use the round brush after a certain operating time to advance through a predetermined angle so that another Circumferential position of the brush is brought into the effective position. To this Way can be a long despite dirt or wear of the bristles Reach brush life.
  • this embodiment also possible to actively drive the round brush, so that the relative movement between brush and clichés regardless of the peripheral speed of the impression cylinder can be adjusted.
  • the mechanism for turning the brush on and off the pressure cylinder for example a pneumatic or hydraulic actuating mechanism is preferred designed so that the brush pressure is adjustable. It is so in particular possible with the cliché cleaning while printing is running, dosing the brush pressure so that the desired cleaning effect is achieved, but on the other hand, the print image is not unduly impaired becomes.
  • the brush at the free end of a lever arm is arranged, which are pivoted against the circumference of the printing cylinder can.
  • a suitable choice of the leverage ratio a sensitive one can be created Achieve dosage of either brush pressure or brush position.
  • a space-saving arrangement of the cleaning brush in the Reach printing unit and there is a possibility, despite a comparative short travel of the adjusting mechanism, the brushes in a far from the peripheral surface to transfer the printing cylinder to the remote position in which it is not in the way when changing the printing cylinder.
  • this Way a simple adaptation of the cleaning device to different Diameter of the printing cylinder allows.
  • Figure 1 shows an inking unit of a flexographic printing press with an impression cylinder 10, a printing cylinder 12, on the peripheral surface clichés 14 stretched are, an anilox roller 16 and a chamber doctor blade 18.
  • a printing material web 20, which is subtracted from a roll, not shown, is over the Counter-pressure cylinder 10 out and runs at a printing position 22 through a formed between the impression cylinder 12 and the impression cylinder 10 Gap.
  • the impression cylinder 10, the impression cylinder 12 and the anilox roller 16 are preferably with single drives, drivable.
  • the printing cylinder 12 and the anilox roller 16 transverse to their axes of rotation from the printing cylinder 10 and from each other so that if necessary a replacement of the printing cylinder and / or the anilox roller 16 enables becomes.
  • the printing cylinder 12 can also be used against a printing cylinder with a other diameters are exchanged to the printing press to change another print length.
  • the screen roller 16 has a fine cell screen on its circumference and is colored with printing ink as it passes through the chamber doctor blade 18.
  • a cleaning device 26 provided to remove of these impurities on the clichés.
  • This cleaning device is essentially a Brush 28 is formed, which extends over the entire width of the printing cylinder 12 and held at the free end of a longer arm 30 of an angle lever 32 is.
  • the angle lever 32 is through a joint 34 in the frame of the printing press held and with the help of an attacking on his shorter arm 36 Pneumatic cylinder 38 swiveling.
  • the travel of the pneumatic cylinder 38 is in a known manner with the help of a control device, not shown, and associated Position sensors, position sensors and the like can be controlled.
  • the angle lever 32 is in a rest position in solid lines shown, in which his arm 30 extends approximately tangentially to the pressure cylinder 12 and the brush 28 has moved a little away from the clichés 14.
  • the angle lever 32 has two parallel, interconnected arms 30, which lie one behind the other in the direction perpendicular to the plane of the drawing in FIG and are connected to opposite ends of the brush 28. These arms 30 are arranged so that they do not hinder the passage of the printing substrate 20.
  • the hinge 34 is close to the peripheral surface of the impression cylinder 10 and is therefore relatively far from the exchangeable printing cylinder 12 and the anilox roller 16 removed.
  • the angle lever is located during normal operation of the printing press 32 in the rest position, and the impression cylinder 10 and the impression cylinder 12 are driven in the direction of rotation indicated by arrows in FIG. 1.
  • the printing substrate 20 is continuously removed from the roll. If the Stock on the roll is used, a roll change in a known manner performed. A new roll with printing material is used, and the new printing material web is attached to an adhesive seam 20 'with the old printing material web connected. A certain length of the printing material web 20, the the adhesive seam contains, will later be separated as waste.
  • the angle lever 32 is dashed into the drawn position pivoted in which the brush 28 with adjustable Brush pressure is applied to the pressure cylinder 12.
  • the brush 28 grips the clichés 14 in one position on in the direction of rotation of the printing cylinder 12 between the ink application position 24 and the printing position 22.
  • Brush the bristles of brush 28 thus the raised parts of the clichés colored with printing ink.
  • the Brush printing can, however, be dosed so finely that the printing ink does not the printing parts of the cliché is removed, so that also during the cliché cleaning an acceptable print image is obtained.
  • the bristles brush 28 over the clichés they are bent slightly, and they spring back a little when they enter the non-printing cliché spaces penetration. This removes the dirt adhering to the edges of the plate effectively removed.
  • the pneumatic cylinder 38 When the printing cylinder 12 is replaced after completion of a printing process to be, the pneumatic cylinder 38 is fully extended so that the Angle lever 32 is pivoted into the position shown in dotted lines in FIG. 1 is in which the brush 28 is very far from the impression cylinder 12, especially then the impression cylinder 12 also to the right in the drawing from the impression cylinder 10 is moved. In this position of the cleaning device 26 becomes the replacement of the printing cylinder 12 and possibly the anilox roller 16th not disabled.
  • FIG. 2 shows a cleaning device as a modified exemplary embodiment 40, in which instead of a stationary, strip-shaped brush, a rotary drive Round brush 42 is provided.
  • This round brush 42 which is also Extending across the entire width of the printing cylinder 12 can, deviating from the representation in Figure 2, held in the same way with the help of an angle lever be as in Figure 1. If the bristles in the operating position with the Clichés 14 come into contact, are worn or dirty the round brush is rotated further by a certain angle, so that the cleaning can be continued with fresh bristles. You can choose the round brush 42 are also continuously driven during the cleaning operation, either counter to the clichés 14 or, as in that shown in Figure 2 Example, parallel to the clichés. In this case, the peripheral speed the bristles of the round brush 42 chosen larger than the peripheral speed of the pressure cylinder 12. The dirt particles loosened from the bristles then again primarily to that of the printing material web 20 flung away from the opposite side.
  • Figure 2 also illustrates the Case that the cleaning device 40 between the printing position 22 and the Ink application position 24 acts on the clichés that their printing ink to the substrate have submitted.
  • FIG. 2 further illustrates one possibility of adjusting the round brush 42 to couple with the on and off movements of the printing cylinder 12.
  • the Printing cylinder 12 is mounted, as usual, with both ends in blocks 44, which in substantially horizontal direction relative to the back pressure cylinder 10 are adjustable.
  • a relatively short-stroke pneumatic cylinder 46, the round brush 42 between the effective and ineffective position is on attached to a holder 48 which is vertically movable in the machine frame and is supported by a cam 50 on a cam 52 of the bracket 44.
  • the block 44 is in the in Figure 2 dash-dotted position shifted.
  • the cam 50 runs on the cam 52 so that the holder 48 and with it the entire cleaning device 40 in a far from the new position of the impression cylinder 12 distant position is raised, in which the round brush 42 is changing of the printing cylinder 12 is not hindered.
EP00127118A 2000-12-12 2000-12-12 Machine à imprimer avec un dispositif de nettoyage du cliché Withdrawn EP1215046A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00127118A EP1215046A1 (fr) 2000-12-12 2000-12-12 Machine à imprimer avec un dispositif de nettoyage du cliché

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00127118A EP1215046A1 (fr) 2000-12-12 2000-12-12 Machine à imprimer avec un dispositif de nettoyage du cliché

Publications (1)

Publication Number Publication Date
EP1215046A1 true EP1215046A1 (fr) 2002-06-19

Family

ID=8170638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00127118A Withdrawn EP1215046A1 (fr) 2000-12-12 2000-12-12 Machine à imprimer avec un dispositif de nettoyage du cliché

Country Status (1)

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EP (1) EP1215046A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108086A1 (fr) * 2004-05-07 2005-11-17 Baldwin Jimek Ab Dispositif de balais pour cylindre porte-blanchet
WO2013104470A2 (fr) 2012-01-09 2013-07-18 Sandvik Intellectual Property Ab Trépan pour marteau à percussion, et queue associée
CN115284740A (zh) * 2022-08-18 2022-11-04 浙江大洪包装科技股份有限公司 一种印刷用的展色机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397235A (en) * 1981-04-25 1983-08-09 Man-Roland Druckmaschinen Aktiengesellschaft Multi-printing mode rotary printing machine
EP0461898A1 (fr) * 1990-06-14 1991-12-18 Baldwin Technology Corporation Système de nettoyage avec brosse rotative
US5575211A (en) * 1994-10-28 1996-11-19 Hycorr Machine Corporation Washing Arrangement for rotary printer
WO1997046388A1 (fr) * 1996-06-07 1997-12-11 Oxy-Dry Corporation Procede et appareil de nettoyage de cliches d'impression flexographiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397235A (en) * 1981-04-25 1983-08-09 Man-Roland Druckmaschinen Aktiengesellschaft Multi-printing mode rotary printing machine
EP0461898A1 (fr) * 1990-06-14 1991-12-18 Baldwin Technology Corporation Système de nettoyage avec brosse rotative
US5575211A (en) * 1994-10-28 1996-11-19 Hycorr Machine Corporation Washing Arrangement for rotary printer
WO1997046388A1 (fr) * 1996-06-07 1997-12-11 Oxy-Dry Corporation Procede et appareil de nettoyage de cliches d'impression flexographiques

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108086A1 (fr) * 2004-05-07 2005-11-17 Baldwin Jimek Ab Dispositif de balais pour cylindre porte-blanchet
WO2013104470A2 (fr) 2012-01-09 2013-07-18 Sandvik Intellectual Property Ab Trépan pour marteau à percussion, et queue associée
CN115284740A (zh) * 2022-08-18 2022-11-04 浙江大洪包装科技股份有限公司 一种印刷用的展色机

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