EP0177886B1 - Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs - Google Patents

Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs Download PDF

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Publication number
EP0177886B1
EP0177886B1 EP85112436A EP85112436A EP0177886B1 EP 0177886 B1 EP0177886 B1 EP 0177886B1 EP 85112436 A EP85112436 A EP 85112436A EP 85112436 A EP85112436 A EP 85112436A EP 0177886 B1 EP0177886 B1 EP 0177886B1
Authority
EP
European Patent Office
Prior art keywords
lever
pinion
gear wheel
flexographic printing
cylinder
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
Application number
EP85112436A
Other languages
German (de)
English (en)
Other versions
EP0177886A3 (en
EP0177886A2 (fr
Inventor
Ludger Ottenhues
Heinz Wesselmann
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher 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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0177886A2 publication Critical patent/EP0177886A2/fr
Publication of EP0177886A3 publication Critical patent/EP0177886A3/de
Application granted granted Critical
Publication of EP0177886B1 publication Critical patent/EP0177886B1/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

Definitions

  • the invention relates to a flexographic printing press with a plurality of inking units and forme cylinders and with at least one counter-pressure cylinder driven by a central wheel, with which the forme cylinder gears mesh during printing operation, the forme cylinders being mounted on forme cylinder slides which are arranged on guides of the machine frame arranged approximately tangentially to radially to the central wheel the impression cylinder for printing operation can be adjusted and removed from it, and the anilox rollers of the inking units, whose anilox roller gears mesh with the forme cylinder gearwheels, can be moved on factory slides in guides of the forme cylinder slides.
  • the form cylinders have to be changed after each print job, whereby the respective print formats can also change.
  • the number of forme cylinders to be changed depends on the number of colors to be printed.
  • the shapes of each forme cylinder must be aligned with each other in such a way that the web running through the flexographic printing machine is printed in a register-appropriate manner. It therefore poses a particular problem to correctly engage the forme cylinders as quickly as possible via the forme cylinder gearwheels with the central wheel for appropriate printing, so that printing can be started after the shortest possible changeover time and longer downtimes of the expensive printing press are avoided.
  • an adjustment device is known in a flexographic printing press of the type specified in DE-A-33 05 095, with which the forme cylinder gearwheels are located with the forme cylinder outside the printing machine connect that these take up a position to the previously aligned central wheel after being lifted into the flexographic printing machine so that the gears of all forme cylinders can be brought into proper engagement with the central wheel by the forme cylinder slide.
  • the forme cylinder shaft is provided with a keyway, onto which a surface line of the forme cylinder is projected and which thus forms the reference point for the alignment of the forme cylinder.
  • the adjusting device is provided with a corresponding shaft spline on which a bushing provided with an external spline toothing can be pushed, which has a centering bolt which can be inserted into the spline and a clamping ring.
  • a second bushing with internal spline teeth can be pushed onto this first bushing, with which the forme cylinder gear is connected in a rotationally fixed manner.
  • a third bush is pushed onto this second bush, which is fastened via a clamping ring and is provided with a latching recess on its circumference, by which the angular position to the centering bolt is determined.
  • the adjusting device first aligns the centering bolt on the keyway in such a way that the toothing is correctly aligned with the shape of the forme cylinder if the coupling to the central wheel would take place by shifting on diameter lines.
  • the forme cylinders are arranged tangentially offset to the central wheel.
  • the third bush is therefore clamped with the second bushing in a position corresponding to the respective phase shift due to the tangential offset of the forme cylinders after corresponding rotation in the adjusting device.
  • the first bush After tightening the first bush on the respective shaft journal of the forme cylinder, it can be properly aligned in the flexographic printing machine to the central wheel by rotating it until the locking recess in the third bush engages in the corresponding locking bolt arranged in the correct position in the machine frame.
  • the object of the invention is therefore to create a flexographic printing machine of the type specified at the outset, the form rollers of which can be exchanged more easily and with greater certainty for a set of new form-oriented form rollers.
  • the forme cylinders or forme cylinder gearwheels are provided with projections or hubs which are central to the forme cylinder axis and which have latching holes on their shells on axially offset circumferential lines corresponding to the number of forme cylinders, that the forme cylinder slides are provided with extendable or pivotable locking bolts are, which are each offset in radial planes such that the respectively in the locking hole of the associated forme cylinder, which is determined by the respective axial offset of the locking hole, can occur that the locking holes for each forme cylinder are arranged in such a way that the through them and the locking bolts on the forme cylinder slides can be inserted with the form cylinders aligned with one another for a correct pressure in the alignment of the central wheel in their fitting position.
  • a lever which is pivotable in its radial plane is mounted in the machine frame in order to align the central wheel in its fitting position, at the free end of which a pinion which can be pivoted into the toothing of the central wheel and which is frictionally engaged with the in order to generate a braking torque Lever is connected, is mounted that a shorter in the direction of the pivot axis of the lever pointing second lever is connected, at the free end of a pressure-piston-cylinder unit is articulated, the other end is mounted in the machine frame, that the braking torque so It is large that the lever is pivoted by the pressure-piston-cylinder unit until the pinion abuts against the central wheel before the second lever turns the pinion, and that the end position of the
  • the pressure-piston-cylinder unit pivots the first lever against the central wheel until the teeth of the ratchet abut the teeth of the central wheel and are supported on the latter.
  • the second lever rotates the pinion so that the teeth of the pinion engage with the teeth of the central wheel, if this had not already occurred during the first approach.
  • the pinion rotates the central wheel to a predetermined position, which is determined by the extended position of the pressure-piston-cylinder unit. In this position, the toothing of the central wheel is aligned with the forme cylinder gearwheels in such a way that they can be moved into engagement with the central wheel without interference.
  • a brake lining acted upon by a spring expediently acts on the pinion, the pretension of which can be changed by an adjusting screw.
  • the anilox roller does not have to be oriented at the correct angle to the forming roller, but the anilox roller gears must assume a position relative to the forming roller gears that the toothing can be brought into engagement with one another by the inking unit slide.
  • a segment-shaped carrier is mounted concentrically to the anilox roller gear on each inking unit carriage, in which pins extendable radially to the anilox roller gear are mounted with heads that can be inserted between its teeth, and that the heads are offset by a fraction of their number attack the toothing via a pitch circle.
  • a predetermined pin must engage with its head in the toothing of the anilox roller gear in question. Once this intervention has taken place, the gears can be moved together, the error corresponding at most to the fraction of the pitch circle division corresponding to the number of pins. This error can be accepted, since the number of pins is at least so large that tooth heads cannot meet.
  • the other pins are retracted with their tooth heads one after the other in order to pre-align the relevant anilox roller gear.
  • the first head engaging between two teeth rotates the anilox roller gear according to its position, the following pins causing further rotations, so that in the intended order of the pins the pin causing the correct alignment must engage between two teeth.
  • the aligning pin also engages between two teeth with a slight twisting of the anilox roller gear.
  • the frame 1 of the flexographic printing machine is equipped with six consoles 2.
  • Each of the brackets 2 initially carries a carriage 3 which has a bearing 4 at its front end.
  • This bearing 4 supports the axis 5 of the forme cylinder 6, the pitch circle of the forme cylinder gear 7 having the same diameter as the forme cylinder 6.
  • a hub 8 is fixedly connected to the forme cylinder gear 7 and has a plurality of axially offset grid bores distributed over the circumference.
  • the number of these raster bores corresponds to the number of printing units or forme cylinders belonging to a printing press.
  • six forme cylinders are provided.
  • the holes 9 are therefore distributed on six axially offset tracks on the forme cylinder hubs.
  • the carriage 3 has two hinge pins 10 and 11, wherein an angled locking lever 12 is pivotally mounted about the hinge pin 10.
  • a pneumatic cylinder 13 is pivotally mounted on the pin 11 of the forme cylinder slide, the piston rod of which engages an arm of the latching lever 12. With the end of the free arm of the locking lever 12 facing away from the hinge pin 10, a locking pin 14 is connected, which is axially aligned so that the locking pin can only engage in one of the locking bores 9 with a corresponding rotation of the forme cylinder gear. If a forme cylinder 6 has consequently been exchanged for another, the forme cylinder need only be rotated by hand until the corresponding locking pin 14 engages in the associated locking hole 9. The forme cylinder gear of the forme cylinder 6 has then reached the desired preset angular position.
  • a carrier-like segment 18 is fixedly connected to the inking unit carriage 17, which carries the anilox roller 16 and is arranged to be movable on the forme cylinder carriage 3, concentrically with the anilox roller gear 15.
  • This segment 18 has four pneumatic cylinders 19, the piston rods of which have positioning pins 20, 21, 22 and 23 at their front ends.
  • the arrangement of the cylinders 19 on the segment is such that a specific positioning pin, which is previously defined, in the illustrated case the positioning pin 21, must be retracted into a tooth gap of the anilox roller gear 15 in its extended position. If this is the case, as shown in FIG. 5, the anilox roller gear 15 is aligned with the forme cylinder gear 7. But since the anilox roller gear 15 can assume any position, it often happens that the positioning pin 21 does not meet a tooth gap.
  • the remaining positioning pins 20, 22 and 23 are extended one after the other in a specific order, whereby the anilox roller gear 15 is rotated in each case by a small step, so that the positioning pin 21, which is the last of the four positioning pins, is then extended is able to snap into a tooth gap with certainty, the positioning pin 21 possibly rotating the anilox roller gear 15 when it finally penetrates into the tooth gap by a small amount.
  • the anilox roller 16 and thus also the anilox roller gear 15 continue to run in the “print-off position”. In such a case, it is sufficient to extend the positioning pin 21 immediately without having previously operated the remaining pins 20, 22 and 23 for presetting. Because of the rotation of the anilox roller gear 15, the positioning pin 21 selects a tooth gap. The continuation of the anilox roller 16 by a separate drive is still ensured because a freewheel 24 is arranged between the anilox roller gear 15 and the shaft of the anilox roller 16. If the forme cylinder gear 7 and anilox roller gear 15 are now approximately aligned with one another, the inking unit carriage 17 is moved in the direction of the forme cylinder gear 7 until the tips of the teeth of the forme cylinder gear 7 and the anilox roller gear 15 just overlap.
  • the positioning pin 21 is retracted and the carriage 17 is moved in the direction of the forme cylinder gear 7 until the teeth come into full engagement. Because of this retracting movement, the anilox roller gear is possibly rotated by an angle by the format gear, because the alignment of the anilox roller gear 15 with the forme cylinder gear 7 can only correspond to the accuracy of a quarter-circle position due to the presence of only four positioning pins.
  • FIGS. 2 to 4 now show a possibility of centering the central wheel 25 itself.
  • a fixed bearing point 26 is provided below the central wheel 25, on which two levers 27 are mounted parallel to each other at a distance. At their ends opposite the bearing point 26, these levers 27 receive an axis 28 which carries a pinion 29.
  • the hub 30 of this pinion 29 is firmly connected to a fork 31 which carries a cross head 32 at its free end.
  • the piston rod 33 of a pneumatic piston-cylinder unit 34 is connected to the crosshead 32.
  • two brake disks 35 are placed on the axle 28 between the hub 30 and the levers 27.
  • the friction between the two levers 27 on the one hand and the hub 30 on the other hand can be adjusted if necessary by means of a compression spring 36 and a screw 37 that excites them. If the piston rod 33 now moves upward from its position shown in FIG. 2, a tooth of the pinion 29 either hits a tooth gap of the central wheel 25 or the tooth tip of a tooth of the central wheel 25.
  • the anilox roller wheel 15 is preset by the positioning pins 20 to 23 except for a quarter of a tooth pitch. As soon as these three presettings have been made, the gear wheels (central wheel, format wheel, anilox roller wheel) can be moved into each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)

Claims (6)

1. Machine d'impression flexographique (1) comportant plusieurs unités d'encrage et cylindres imprimeurs (6) et au moins un cylindre à contre-pression (38) actionné par une roue centrale (25), avec lequel les roues dentées (7) des cylindres imprimeurs s'engrènent pendant l'impression, dans laquelle les cylindres imprimeurs (6) sont logés sur des chariots (3) de cylindres imprimeurs qui peuvent être amenés, sur des guidages du bâti de machine disposés approximativement ds manière tangentielle jusqu'à radiale par rapport à la roue centrale (25), contre le cylindre à contre-pression (38) pour imprimer, et être éloignés de celui-ci, et dans laquelle les cylindres de trame (16) des unités d'encrage, dont les roues dentées (15) desdits cylindres de trame s'engrènent avec les roues dentées (7) des cylindres imprimeurs, peuvent être déplacés sur des chariots (17) des unités d'encrage dans des guidages des chariots (3) des cylindres imprimeurs, caractérisée en ce que les cylindres imprimeurs (6) ou les roues dentées (7) des cylindres imprimeurs sont pourvus de prolongements ou moyeux (8) centrés par rapport à l'axe (5) des cylindres imprimeurs, qui présentent des trous d'arrêt (9) sur leur surface, sur des lignes périphériques décalées axialement les unes par rapport aux autres et dont le nombre correspond au nombre de cylindres imprimeurs (6), que les chariots (3) des cylindres imprimeurs sont pourvus de boulons d'arrêt (14) pouvant sortir et pivoter, qui sont respectivement décalés les uns par rapport aux autres sur des plans radiaux de manière telle qu'ils peuvent s'encliqueter respectivement dans le trou d'arrêt (9) du cylindre imprimeur (6) associé, qui est déterminé par le déport axial respectif du trou d'arrêt (9), que les trous d'arrêt (9) sont disposés pour chaque cylindre imprimeur (6) de manière telle que les cylindres imprimeurs (6), fixés sur les chariots (3) de cylindres imprimeurs au moyen de ces trous et des boulons d'arrêt (14), comportant des formes alignées les unes par rapport aux autres pour une impression ajustée, puissent être enclenchés dans la denture, alignée dans sa position d'ajustage, de la roue centrale (25).
2. Machine d'impression flexographique selon la revendication 1, caractérisée en ce que, pour aligner la roue centrale (25) dans sa position d'ajustage, un premier levier (27) pouvant pivoter sur son plan radial est monté dans le bâti de machine, à l'extrémité libre duquel est logé un pignon (29) pouvant s'encliqueter dans la denture de la roue centrale (25), qui est relié au premier levier (27) selon un entraînement par friction pour créer un moment de freinage, qu'un deuxième levier (31) plus court, dirigé en direction de l'axe de pivotement du premier levier (27), est relié au pignon (29), et à l'extrémité libre dudit deuxième levier (31) est articulée une unité pneumatique piston-cylindre (34), son autre extrémité étant logée dans le bâti de machine, que le moment de freinage est d'une importance telle que le premier levier (27) est pivoté par l'unité pneumatique piston-cylindre (34) jusqu'à ce que le pignon (29) vienne buter contre la roue centrale (25) avant que le deuxième levier (31) fasse tourner le pignon (29), et que la positoin finale des leviers (27, 31) est déterminée par la position sortie de l'unité pneumatique piston-cylindre (34).
3. Machine d'impression flexographique selon la revendication 1 ou 2, caractérisée en ce qu'une garniture de frein (35), chargée par un ressort (36), agit sur le pignon (29) pour régler le moment de freinage, dont la précontrainte peut être modifiée au moyen d'une vis de réglage (37).
4. Machine d'impression flexographique selon l'une des revendications 1 à 3, caractérisée en ce qu'un support (18) en forme de segment est fixé sur chaque chariot (17) d'unité d'encrage, concentriquement par rapport à la roue dentée (15) du cylindre de trame, support (18) dans lequel sont montées des chevilles (20, 21, 22, 23) aptes à se déplacer vers l'extérieur, radialement par rapport à la roue dentée (15) du cylindre de trame, et comportant des têtes pouvant s'engager entre les dents dudit cylindre de trame, et que les têtes, décalées de la fraction de leur nombre, agissent sur un pas transversal de la denture.
5. Machine d'impression flexographique selon la revendication 4, caractérisée en ce que les chevilles (20, 21, 22, 23) peuvent être sorties au moyen d'unités pneumatiques piston-cylindre (19).
6. Machine d'impression flexographique selon la revendication 4 ou 5, caractérisée en ce qu'il est prévu quatre chevilles (20, 21, 22, 23).
EP85112436A 1984-10-10 1985-10-01 Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs Expired - Lifetime EP0177886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3437216 1984-10-10
DE19843437216 DE3437216A1 (de) 1984-10-10 1984-10-10 Flexodruckmaschine mit mehreren farbwerken und formzylindern

Publications (3)

Publication Number Publication Date
EP0177886A2 EP0177886A2 (fr) 1986-04-16
EP0177886A3 EP0177886A3 (en) 1988-06-01
EP0177886B1 true EP0177886B1 (fr) 1990-08-16

Family

ID=6247596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112436A Expired - Lifetime EP0177886B1 (fr) 1984-10-10 1985-10-01 Machine d'impression flexographique ayant plusieurs unités d'encrage et cylindres imprimeurs

Country Status (7)

Country Link
US (1) US4602562A (fr)
EP (1) EP0177886B1 (fr)
JP (1) JPS6194760A (fr)
CA (1) CA1249481A (fr)
DE (1) DE3437216A1 (fr)
DK (1) DK163871C (fr)
ES (1) ES8608408A1 (fr)

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WO1988007448A1 (fr) * 1987-03-24 1988-10-06 Sillars Ian Malin Appareil d'impression de tables de nombres quasi aleatoires
DE3733375A1 (de) * 1987-10-02 1989-04-13 Metronic Geraetebau Flexo-druckeinheit
DE3742129A1 (de) * 1987-12-11 1989-06-22 Windmoeller & Hoelscher Druckmaschine
US4953461A (en) * 1988-05-20 1990-09-04 Harris Graphics Corporation System for continuously rotating plate a blanket cylinders at relatively different surface speeds
DE4001735A1 (de) * 1990-01-22 1991-07-25 Windmoeller & Hoelscher Vorrichtung zum verfahren von wellen lagernden lagerboecken
DE4017285A1 (de) * 1990-05-29 1991-12-05 Windmoeller & Hoelscher Druckmaschine, vorzugsweise flexodruckmaschine
DE4308492A1 (de) * 1993-03-17 1994-09-22 Windmoeller & Hoelscher Druckmaschine
DE4308711C2 (de) * 1993-03-18 1997-05-15 Windmoeller & Hoelscher Vorrichtung zum Verfahren von auf Schlitten befestigten und Wellen lagernden Lagerböcken
ES2128892B1 (es) * 1995-04-28 2000-01-16 Comexi Sa Maquina para la impresion flexografica en varios colores con prerregistro automatico de impresion de los distintos colores.
US5770907A (en) * 1995-08-14 1998-06-23 Itt Automotive Electrical Systems, Inc. Windshield wiper motor for use in a vehicle and method for manufacturing
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
US5616182A (en) * 1995-12-04 1997-04-01 Itt Automotive Electrical Systems, Inc. Method and apparatus for wiping a windshield
US6040667A (en) * 1995-12-12 2000-03-21 Valeo Elecrical Systems, Inc. System and method for driving wipers in a windshield wiper system
DE19611048A1 (de) 1996-03-20 1997-09-25 Windmoeller & Hoelscher Druckmaschine, vorzugsweise Flexodruckmaschine
DE19716943A1 (de) * 1997-04-22 1998-11-05 Windmoeller & Hoelscher Verfahren zur Steuerung der Drehzahl der Druckzylinder einer Druckmaschine
DE10136401A1 (de) 2001-07-26 2003-02-13 Windmoeller & Hoelscher Flexodruckmaschine
DE10209536B4 (de) * 2001-11-12 2006-11-02 Fritz Achelpohl Druckmaschine, vorzugsweise Flexodruckmaschine
DE10204514B4 (de) * 2002-02-05 2006-03-23 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Korrektur des Längsregisterfehlers, welcher durch die Beistellung auftritt
DE10211328B4 (de) 2002-03-14 2005-05-19 Windmöller & Hölscher Kg Vorrichtung zum Anstellen einer Walze an ein sich im wesentlichen mit der Umfangsgeschwindigkeit der Walze bewegtes Widerlager mittels einer Spindel-Spindelmutter-Paarung
JP6307267B2 (ja) * 2013-12-25 2018-04-04 アイマー・プランニング株式会社 印刷機
DE102015108126A1 (de) * 2015-05-22 2016-11-24 Windmöller & Hölscher Kg Druckmaschine sowie Verfahren zur Anstellung mehrerer Farbwerke einer Druckmaschine
CN105882112A (zh) * 2016-04-29 2016-08-24 元亨利云印刷科技（上海）有限公司 一种双工位多功能轮转印刷机组

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US3026798A (en) * 1960-03-15 1962-03-27 George O Frostad Printing apparatus
US3163109A (en) * 1963-01-21 1964-12-29 Faustel Inc Interchangeable gear drive means for rotary printing mechanism
US3173360A (en) * 1963-08-29 1965-03-16 Rice Barton Corp Roll assembly and disassembly means for rotary print machine
US3983808A (en) * 1971-12-02 1976-10-05 Chromax Ltd. Method and apparatus for applying flexographic printing plates to the printing cylinders of a multi-cylinder printing machine
DE2941521C2 (de) * 1979-10-12 1982-11-25 Windmöller & Hölscher, 4540 Lengerich Verfahren zum Austauschen der Formzylinder einer Flexodruckmaschine
DE3150833C2 (de) * 1981-12-22 1983-12-22 Windmöller & Hölscher, 4540 Lengerich Flexodruckmaschine
DE3305095A1 (de) * 1982-02-22 1983-09-01 Paper Converting Machine Co., 54305 Green Bay, Wis. Verfahren und vorrichtung zum einstellen einer druckpresse

Also Published As

Publication number Publication date
JPS6194760A (ja) 1986-05-13
ES8608408A1 (es) 1986-07-16
DE3437216A1 (de) 1986-04-10
US4602562A (en) 1986-07-29
EP0177886A3 (en) 1988-06-01
CA1249481A (fr) 1989-01-31
ES547731A0 (es) 1986-07-16
EP0177886A2 (fr) 1986-04-16
DK163871C (da) 1992-09-14
DK462785D0 (da) 1985-10-09
DK163871B (da) 1992-04-13
DE3437216C2 (fr) 1990-02-08
DK462785A (da) 1986-04-11

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