EP2251197A2 - Presse d'impression - Google Patents

Presse d'impression Download PDF

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Publication number
EP2251197A2
EP2251197A2 EP10005013A EP10005013A EP2251197A2 EP 2251197 A2 EP2251197 A2 EP 2251197A2 EP 10005013 A EP10005013 A EP 10005013A EP 10005013 A EP10005013 A EP 10005013A EP 2251197 A2 EP2251197 A2 EP 2251197A2
Authority
EP
European Patent Office
Prior art keywords
printing
web
material web
loop guide
roller
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Withdrawn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
EP10005013A
Other languages
German (de)
English (en)
Other versions
EP2251197A3 (fr
Inventor
Norbert Wilhelm
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.)
Edelmann Graphics GmbH
Original Assignee
Edelmann Graphics GmbH
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 Edelmann Graphics GmbH filed Critical Edelmann Graphics GmbH
Publication of EP2251197A2 publication Critical patent/EP2251197A2/fr
Publication of EP2251197A3 publication Critical patent/EP2251197A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/02Conveying or guiding webs through presses or machines
    • B41F13/04Conveying or guiding webs through presses or machines intermittently
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/02Arrangements of indicating devices, e.g. counters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00Advancing webs
    • B65H20/30Arrangements for accumulating surplus web
    • B65H20/32Arrangements for accumulating surplus web by making loops
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/042Sensing the length of a web loop
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00Printing machines of special types or for particular purposes
    • B41P2217/10Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/11Machines with modular units, i.e. with units exchangeable as a whole
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00Application field
    • B65H2801/03Image reproduction devices
    • B65H2801/21Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to an intermittently operable printing press.
  • the printing machine has at least two in the direction of the material web successively arranged printing units, each having a printing tower, a rotatable drivable vacuum feed roller in front of the printing tower and a rotatable drivable vacuum extraction roller behind the printing tower.
  • the vacuum feed roller is preceded by a paper storage, and the vacuum extraction roller downstream of a paper storage.
  • the printing press of the US 2001/00 47 727 A1 has so-called pressure rollers (dancer rolls).
  • the printing press of the JP 2004 351 640 A has so-called paper loop parts.
  • an offset printing machine which can be operated either intermittently and continuously rotating by the exchange of cartridges.
  • the blanket cylinder has a blank portion in the blanket circumferentially.
  • the counter-pressure cylinder has peripheral sections a radially inwardly receding lateral surface. As a result, the material web is released between the continuously counter-rotating cylinders for the return transport.
  • a web offset printing press is known in which the blanket cylinder and the impression cylinder are recessed on the jacket in the circumferential direction.
  • the extent of the supply of the material web and thus the printing format can be changed by the fact that the position of the blanket cylinder and the impression cylinder is adjusted in the circumferential direction relative to each other.
  • the adjustment is at the DE 38 32 891 A1 thereby causing intermeshing gears on the cylinders thereof released, the impression cylinder against the blanket cylinder rotated and the gears are tightened again.
  • An intermittent operation with return movement of the material web takes place in the DE 38 32 891 A1 not happening.
  • the object of the invention is to calm the course of the web of an intermittently operating printing machine and thereby better to control.
  • intermittently operable printing machine for printing a web of material from the roll has one or more, in the direction of the web of material successively arranged printing unit (s).
  • the foremost printing unit in the running direction of the web is preceded by a loop guide slot and the downstream printing unit in the running direction of the web is followed by a loop guide slot.
  • the web forming a loop runs along the shaft walls of the loop guide shafts.
  • the loop guide shafts have a top open housing of rectangular outline. Opposing side walls of the housing are the shaft walls, along which runs the loop forming material web.
  • the housing of the loop guide shafts is open at the bottom.
  • a deflection roller is arranged in the housings of the loop guide shafts above.
  • the material web is guided over the deflection roller. After looping the deflection roller is out of action.
  • the housing of the loop guide shafts can be adjusted in the machine longitudinal direction. Thereby the introduction of the web is facilitated when setting up the printing press.
  • the adjustment is preferably done by hand.
  • the loop guide shafts are provided with photocells which respond when the loop length of the material web falls below a predetermined minimum nominal length or exceeds a predetermined maximum nominal length.
  • the printing machine is used to print a web of material 10 from the roll. It has according to the usual row construction in the direction of the web 10 more printing units 12, 14, 16 in a row. In the figure, three printing units 12, 14, 16 are shown with format balancing rollers 18 in between. It is understood, however, that only two printing units 12, 14 and, as usual in multi-color printing, four and more printing units 12, 14, 16 in a row and format compensating rollers 18 of the same structure between successive printing units 12, 14, 16 may be provided. The printing machine shown in the figure can therefore be arbitrarily scaled in the number of printing units 12, 14, 16 and format compensating rollers 18.
  • the printing press can optionally intermittently (see. Fig. 1 ) or continuously rotating (cf. Fig. 2 ) operate. All printing units 12, 14, 16 are alternately equipped with printing cylinders containing cartridges 20, 22 for the intermittent operation or the continuously rotating operation. The outer dimensions of both types of cassettes 20, 22 and their positioning and locking on the printing units 12, 14, 16 is the same. A cassette change can be made from both sides of the press.
  • the invention shows an example of a printing machine for web offset printing with particular attention to the label printing.
  • the invention is not limited to this printing technique and application. It can also be used on printing presses for flexographic printing, screen printing, gravure printing and the like. be realized.
  • the printing cylinders for the intermittent as well as continuous rotating operation are a plate cylinder 24, a blanket cylinder 26 and an impression cylinder 28.
  • the cylinders 24, 26, 28 of each cassette 20, 22 are of the same cylinder circumference corresponding to a maximum printing format of, for example 26 inch.
  • the cylinder circumference is fixed.
  • Blanket cylinder 26 and impression cylinder 28 are each arranged vertically above one another.
  • cassette 20, 22 are the plate cylinder 24 in mating contact with the inking rollers 30 of an inking unit, which is of conventional construction and requires no further description.
  • the cassette 20, 22 with the printing cylinders and the inking unit are the core components of a respective printing unit 12, 14, 16 associated printing tower.
  • the blanket cylinder 26 for the continuously rotating operation (see. Fig. 2 ) is covered over at least approximately the full extent with blanket.
  • the blanket is glued or stretched.
  • the impression cylinder 28 for the continuously rotating operation is fully cylindrical. The surface of his coat goes over the full extent.
  • the impression cylinder 28 for the intermittent operation (see. Fig. 1 ) is recessed circumferentially on the jacket. He has a cylindrical shell portion 32 of larger diameter, which merges at both ends radial steps 34 in a cylindrical shell portion 36 of smaller diameter.
  • the sheath portion 32 of larger diameter occupies about sixteen twenty-sixth, and the sheath portion 36 of smaller diameter about ten twenty-sixth of the cylinder circumference.
  • On the blanket cylinder 26 for the intermittent operation is attached to both ends of the clamping shafts 38, a printing blanket 40, which occupies about sixteenth twenty-sixth of the cylinder circumference.
  • the blanket 40 has on the tension shafts 38 a sharp-edged waste. Between the tensioning shafts 38, the sheath 42 of the blanket cylinder 26 is free of about ten sixteenth of the cylinder circumference of printed blanket.
  • the material to be printed web 10 passes through the gusset between blanket cylinder 26 and impression cylinder 28, which rotate in opposite directions.
  • the running direction of the material web 10 is in the illustration from left to right.
  • the printing process takes place in the contact zone of the material web 10 with the printing blanket 40 and the impression cylinder 28.
  • Fig. 1 take the blanket cylinder 26 and the impression cylinder 28 for intermittent operation an angular position to each other, in which the clamping shafts 38 of the blanket cylinder 26 opposite to the radial diameter steps 34 of the impression cylinder 28.
  • the printing blanket 40 is over the full sixteen twenty-sixth of the circumference of the cylinder 26, 28 of the shell portion 32 of larger diameter of the impression cylinder 28 opposite.
  • the non-printing free zone 42 of the blanket cylinder 26 is over the remaining ten twenty-sixth perimeter of the cylinder 26, 28 of the shell portion 36 of smaller diameter of the impression cylinder 28 opposite.
  • the blanket cylinder 26 and the impression cylinder 28 rotate continuously.
  • the web 10 is moved forward and printed, while the printing blanket 40 and the shell portion 32 of larger diameter of the impression cylinder 28 are opposite. If and as long as the web 10, however, between the blanket cylinder 26 and the shell portion 36 of smaller diameter of the impression cylinder 28 comes to rest, the printing process is interrupted and the web 10 is released for a return movement. After the return movement, the printing process again. This results in the intermittent operation of the printing press.
  • the full length of the blanket 40 is evidently utilized in the circumferential direction, i. H. printed the largest possible size.
  • the blanket cylinder 26 and the impression cylinder 28 are adjusted in the circumferential direction relative to each other. It is then a part of the circumferential length of the blanket 40 of the shell portion 36 of smaller diameter of the impression cylinder 28 against. This part does not print. It prints only the complementary part of the circumferential length of the blanket 40, which is opposite to the shell portion 32 of larger diameter of the impression cylinder 28. As a result, a smaller format is printed.
  • the largest possible size that can be printed corresponds to sixteen twenty-sixth of the circumferential length of blanket cylinder 26 and impression cylinder 28.
  • the format can vary between eight-sixteenth and sixteenth twenty-sixth the circumferential length. It is understood that a certain non-printing circumferential length is needed for the return movement of the material web 10.
  • Each printing unit 12, 14, 16 has a central main drive for the common rotary drive of the inking unit, the plate cylinder 24 and the blanket cylinder 26.
  • the impression cylinder 28 is independently driven by a servo drive 44 in rotation. In printing operation, the rotation in the cylinder 24, 26, 28 is synchronous.
  • the circumferential adjustment of blanket cylinder 26 and impression cylinder 28 for format adjustment is controlled controlled by the motor pressure motor.
  • In response to a corresponding control signal with the servo drive 44 of the impression cylinder 28 is adjusted in the circumferential direction against the standing blanket cylinder 26.
  • At least on a cassette system for the cylinder 26, 28 is unique.
  • the web of material to be printed 10 is continuously unwound from a roll and the finished printed web 10 either wound continuously on a roll or cut.
  • the printing units 12, 14, 16 of the web 10 as continuous, in the intermittent operation, however, with reciprocating movement of the web 10 through. This movement is effected with a vacuum feed roller 46 arranged on the input side in front of each printing unit 12, 14, 16 and a vacuum pull-out roller 48 arranged on the output side, which are driven in a reciprocating rotation.
  • the required length compensation of the material web 10 takes place by looping before the first 12 and behind the last printing unit 16.
  • the units serving for loop formation, the vacuum retraction and extraction rollers 46, 48 are bypassed and bypassed by the web 10.
  • the material web 10 coming from the roll passes via an inlet roll 50 to the feed drum 52 of a web infeed driven in continuous rotation.
  • a pressure roller 54 against the jacket of the feed drum 52 acts a pressure roller 54, the gusset formed with the feed drum 52 passes through the material web 10.
  • the pressure roller 54 is rubber-covered. It can be electropneumatically switched on and off with respect to the feed drum 52 and thereby control in their pressing force.
  • the web 10 passes to a guide roller 56, which is arranged at the top in a loop guide shaft 58.
  • the material web 10 is guided over the deflection roller 56 when setting up the printing press.
  • a looping of the material web 10 in the loop guide shaft 58 takes place.
  • the loop guide shaft 58 has a top and bottom open housing of rectangular Grudriß, at its opposite inner walls, the web forming a loop 10 runs along. After looping, the guide roller 56 is no longer in contact with the material web 10.
  • the loop guide shaft 58 has two photocells, which respond when the loop length falls below a predetermined minimum nominal length or exceeds a predetermined maximum nominal length.
  • the loop guide shaft 58 can be adjusted for easy insertion of the material web 10 by hand in the machine longitudinal direction. This is dashed lines 58 'in the figure and indicated with respect to the adjustment direction by the arrow 60.
  • a chicane 62 At the loop guide shaft is followed by a chicane 62 with five staggered successively arranged rollers, between which the web 10 is passed.
  • the baffle 62 is used to calm the material web 10. Their rollers are driven in opposite directions to the material web feed in rotation, with a shell speed that exceeds the speed of the web 10 in the return movement in the intermittent operation by about 20%.
  • baffles are arranged at the back of the chicane 62 to the printing tower of the first printing unit 12 towards baffles. Furthermore, guide plates are provided on both sides of the rollers, which can be adjusted with threaded spindles individually by hand transversely to the direction of the web 10.
  • the guide plates are provided with bores through which silicone (polyorganosiloxane) is injected by means of a timed pump via brushes arranged in the bores. The silicone prevents the label printing from the web 10 laterally exiting adhesive adheres to the rollers and the guide plates.
  • the material web 10 passes to the vacuum feed roller 46 before the first printing unit 12. In intermittent operation, the web 10 is guided over the jacket of the driven in reciprocating rotation vacuum feed roller.
  • the vacuum feed roller 46 is subdivided into five axially adjacent vacuum chambers, namely a central vacuum chamber and two outer vacuum chambers in a symmetrical arrangement on both sides thereof.
  • the shell of the vacuum feed roller 46 is provided in the region of each chamber with numerous, distributed over the circumference axial longitudinal slots, which can be blown through for cleaning purposes in a suitable manner. This is done on a sixth chamber, which faces the five vacuum chambers in the circumferential direction.
  • the jacket of the vacuum feed roller 46 is externally coated with ceramic.
  • At the middle vacuum chamber of the vacuum feed roller 46 is constantly under pressure.
  • the outer vacuum chambers are switched on, depending on the width of the web 10 if necessary.
  • a rubber-based pressure roller 64 cooperates, which is electro-pneumatically with respect to the vacuum feed roller 46 and turned off and thereby controlled in their pressing force.
  • the material web 10 coming from the chicane 62 passes through the gusset between the vacuum feed roller 46 and the pressure roller 64.
  • the vacuum extraction roller 48 is identical to the vacuum retraction roller 46 and as they are driven in reciprocating rotation. against the Jacket of the vacuum extraction roller 48 acts on a pressure roller 68, which corresponds in construction and function of the pressure roller 64.
  • the vacuum feed roller 46 is mounted stationary.
  • the vacuum extraction roller 48 is mounted laterally by means of a guide block about ⁇ 1 mm horizontally adjustable to adjust them with respect to the vacuum feed roller 46 can.
  • a probe 72 is mounted before the inlet of the cassette 20 under the trough 70 of a dampening unit.
  • the probe 72 is laterally displaceable. He takes the Passerversatz the color in the front printing unit 12 and controls it by the drive for the vacuum pickup roller 46 and vacuum extraction roller 48 of the central printing unit 14. The same happens between the central printing unit 14 and the rear printing unit sixteenth
  • a format compensating roller 18 is arranged, which is wrapped by the material web 10.
  • the format compensating roller 18 of the format repeat between the printing units 12, 14 is set.
  • the format compensating roller 18 is arranged rotatably, in particular so locked against turning with the web 10. It consists of a hollow cylinder, which is distributed over half its circumference, provided axial longitudinal slots and coated on the surface with microporous, air-permeable sintered metal is.
  • the hollow cylinder is provided at its two end faces with connections for compressed air. Their pressure is regulated.
  • the half-side of the hollow cylinder, at which the air escapes, is looped around in intermittent operation by the material web 10.
  • the format compensating roller 18 is mounted on both sides in load cells.
  • the load cells can be adjusted independently with gear motor actuated ball screw Hubspindelantrieben in the direction of the vacuum rollers 46, 48 of the adjacent printing units 12, 14 and away.
  • the motors are equipped with encoders. Their respective rotation angle is electronically controlled according to the format-dependent predetermined loop length.
  • the format compensation roller 18 is positioned with the ball screw Hubspindelantrieben depending on the format repeat.
  • the compressed air emerging from the sintered metal forms between the format compensating roll 18 and the material web 10 an air cushion of ⁇ thickness, which generates a well-defined tension in the material web 10.
  • By the Passerregelung resulting voltage changes in the web 10 are recorded with the load cells and corrected with the ball screw Hubspindelantrieben.
  • a path sensor 74 is attached to the side of the printing press. If the material web 10 runs away to the side, which is detected by the web sensor 74, which outputs a control signal to the corresponding ball screw Hubspindelantrieb and corrects the web run by inclination of the format compensating roller 18. Alternatively, the web run can be stabilized with lateral guide plates.
  • the web 10 After passing through the second printing unit 14, the web 10 passes again to a format compensating roller 18, the following printing unit 16, u.s.w.
  • the vacuum extraction roller 48 of the last printing unit 16 is followed by a deflection roller 76 serving for loop formation and a loop guide shaft 78, the structure and adjustability of which corresponds to those at the inlet of the printing press. After looping and the guide roller 76 is no longer in contact with the web 10.
  • the emerging from the loop guide shaft 78 web 10 passes through a chicane 80 to the pullout drum 82 a web statement.
  • the structure of the chicane 80 corresponds to the chicane 62 on the web feed of the printing press.
  • a rubber-based pressure roller 84 presses the material web 10 with a controlled pressing force against the jacket of the pullout drum 82.
  • the loop guide shafts 58, 58 ', 78 and the baffles 62, 80 at the inlet and outlet of the printing machine out of action.
  • the web 10 passes from the pressure rollers 54 on the feed drum 52 to a guide roller 86 and at a distance on the vacuum feed roller 46 away in the first printing unit 12. After passing through this printing unit 12 and the associated Trockners 66, the web 10 is performed at a distance over the vacuum extraction roller 48 away. It reaches bypassing the format compensating roller 18, a guide roller 88 and from there in turn at a distance on the vacuum feed roller 46 away the next printing unit 14. The coming of the dryer 66 of the last printing unit 16 web 10 is a discharge roll 90 directly to the pullout drum 82nd led the train statement.
EP10005013A 2009-05-15 2010-05-12 Presse d'impression Withdrawn EP2251197A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009021551A DE102009021551A1 (de) 2009-05-15 2009-05-15 Druckmaschine

Publications (2)

Publication Number Publication Date
EP2251197A2 true EP2251197A2 (fr) 2010-11-17
EP2251197A3 EP2251197A3 (fr) 2011-05-11

Family

ID=42537800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10005013A Withdrawn EP2251197A3 (fr) 2009-05-15 2010-05-12 Presse d'impression

Country Status (2)

Country Link
EP (1) EP2251197A3 (fr)
DE (1) DE102009021551A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415881A2 (fr) 1989-08-30 1991-03-06 De La Rue Giori S.A. Machine rotative d'impression combinée, particulièrement pour imprimer les papiers de valeur
US20010047727A1 (en) 2000-05-11 2001-12-06 Shinichi Fujishiro Rotary press

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797389A (en) * 1972-04-28 1974-03-19 Njm Inc Offset printing press
CH667260A5 (de) * 1984-10-04 1988-09-30 Grapha Holding Ag Transportstrecke fuer das intermittierende vorbeifuehren einer papierbahn oder dgl.
GB2198265B (en) * 1986-10-14 1991-05-01 Burkhard Wilfred Wetzel Web feed apparatus with registration means
JPS6455025U (fr) 1987-09-30 1989-04-05
DE10307089B4 (de) 2002-10-19 2006-05-24 Koenig & Bauer Ag Rakel einer Druckmaschine
DE10311219A1 (de) * 2003-03-14 2004-09-30 Werner Kammann Maschinenfabrik Gmbh Verfahren und Vorrichtung zum Bedrucken einer Bahn
JP4411626B2 (ja) * 2003-05-27 2010-02-10 株式会社ミヤコシ バリアブル印刷機
US20080236419A1 (en) 2005-08-30 2008-10-02 Jose Betes Peruga Roller Cassette for Semi-Rotary Machines, Which Can Be Inserted Into Offset Printing Units

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415881A2 (fr) 1989-08-30 1991-03-06 De La Rue Giori S.A. Machine rotative d'impression combinée, particulièrement pour imprimer les papiers de valeur
US20010047727A1 (en) 2000-05-11 2001-12-06 Shinichi Fujishiro Rotary press

Also Published As

Publication number Publication date
EP2251197A3 (fr) 2011-05-11
DE102009021551A1 (de) 2010-11-25

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