EP1928661B1 - Approche et eloignement en diagonale de cylindres porte-blanchets au niveau d'un cylindre satellite - Google Patents

Approche et eloignement en diagonale de cylindres porte-blanchets au niveau d'un cylindre satellite Download PDF

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Publication number
EP1928661B1
EP1928661B1 EP06775158A EP06775158A EP1928661B1 EP 1928661 B1 EP1928661 B1 EP 1928661B1 EP 06775158 A EP06775158 A EP 06775158A EP 06775158 A EP06775158 A EP 06775158A EP 1928661 B1 EP1928661 B1 EP 1928661B1
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
central cylinder
cylinders
printing cylinders
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.)
Not-in-force
Application number
EP06775158A
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German (de)
English (en)
Other versions
EP1928661A1 (fr
Inventor
Andres Miescher
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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 Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Publication of EP1928661A1 publication Critical patent/EP1928661A1/fr
Application granted granted Critical
Publication of EP1928661B1 publication Critical patent/EP1928661B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/20—Means enabling or facilitating exchange of tubular printing or impression members, e.g. printing sleeves, blankets
    • B41P2227/21—Means facilitating exchange of sleeves mounted on cylinders without removing the cylinder from the press

Definitions

  • This change in the quality of the printed image can have various causes, such as displacements in the register, wear of the cylinder surfaces, wear of mechanical parts, such as bearings, permanent deformations of cylinders.
  • the invention has for its object to provide a rotary printing press and a method for changing pads on such a machine, in which the switching on and off of the impression cylinder to the central cylinder is effected so that the forces acting on the central cylinder forces are minimized.
  • the printing cylinder for example blanket cylinder, which form a pressure nip with the central cylinder only in pairs to the central cylinder, such as satellite cylinder, on and off.
  • the pressure cylinders form a pair, which lie diagonally opposite each other via the central cylinder.
  • From the US 2,542,229 is a rotary printing machine with a central cylinder and two diagonally across the central cylinder arranged opposite pressure cylinders known.
  • the impression cylinders can be simultaneously parked by means of a crank from the central cylinder and adjusted to the central cylinder.
  • the DE 102 10 561 A1 describes a satellite sheet-fed rotary printing unit having means for simultaneously and simultaneously adjusting and holding a plurality of printing units to the satellite cylinder.
  • From the US 942,934 a printing press is known in which printing cylinder individually or more can be turned off simultaneously for printing to a counter-pressure cylinder and from this.
  • the FR 2485990 A1 describes a printing press with a central cylinder to the multiple printing units simultaneously on and off.
  • From the US 2,042,060 a printing press is known in which a plurality of printing cylinder synchronously to a central impression cylinder and can be turned off by this.
  • the invention claims a rotary printing machine, preferably a web-fed rotary printing machine for newspaper printing, which has a printing unit with a central cylinder and two printing cylinders, each of which forms a printing nip with the central cylinder.
  • the two pressure cylinders are arranged diagonally opposite each other via the central cylinder and can only be switched on and off at the same time from the central cylinder to the central cylinder.
  • Each of the two impression cylinders is each a forme cylinder, e.g. Plate cylinder, assigned.
  • the printing unit has a central cylinder with four printing cylinders and four associated therewith form cylinders.
  • the two pressure cylinders which lie diagonally opposite each other via the central cylinder, form a pressure cylinder pair.
  • Each of these pairs of printing cylinders can be switched on and off independently of the other pair of printing cylinders to the central cylinder, wherein the printing cylinder pair forming pressure cylinder are only adjusted synchronously.
  • This exclusively synchronous or simultaneous adjustment movement of the printing cylinder pairs can be provided on site by appropriate coupling of the cylinder pairs, or it can be effected by a controller, for example by the machine control of the printing press.
  • a controller for example by the machine control of the printing press.
  • the electronic control of the arrival and Anstellterrorism the pairs of printing cylinders as it comes in a mechanical control over time by natural wear to unpleasantness when turning on and off.
  • the cylinder coupling or the controller is designed so that it allows only a synchronous on and off the printing cylinder of each pair of printing cylinders to the central cylinder.
  • the forces acting perpendicularly on the axis of rotation of the central cylinder which occur in particular when the printing cylinder is adjusted to the central cylinder, cancel each other as far as possible. This leads to a reduced mechanical load on the central cylinder per setting operation and thus to a longer service life of the central cylinder and lower maintenance and repair costs.
  • the on and off of the printing cylinder pairs to the central cylinder can be done simultaneously. According to the invention, one after the other. Thus, while one of the printing cylinder pair is turned on and prints on the central cylinder, another pair of printing cylinders may be offset from the central cylinder.
  • On the form cylinders of the parked printing cylinder pair can e.g. a plate change done by means of a printing form manipulator.
  • the printing pair of printing cylinders can first be turned off by the central cylinder and then the other pair of printing cylinders can be adjusted to the central cylinder.
  • the other pair of printing cylinders can first be turned on and only then can the first pair of printing cylinders be turned off.
  • the forme cylinders used in the rotary machine can have a slightly convex surface, they can be cambered. What is meant is that the forme cylinders, starting from identical cylinder diameters on the two sides, have a continuously increasing diameter towards the middle and the largest cylinder diameter lies exactly in the center of the cylinder, seen in the axial direction. The increase in the cylinder diameter from both sides towards the middle is identical.
  • the zero point is exactly at the point of the axial center of the Cartesian coordinate system Cylinder
  • the values y at each position of the x-axis in the plus and minus regions are identical, the maximum of y is at the zero point.
  • printing units of the invention will find their use in 6/2 or 4/1 printing presses. Less preferred, but not excluded, is their use in 6/1 presses or other types of presses.
  • the linings of the form cylinder by means of a printing form manipulator, which are assigned to the parked printing cylinders.
  • FIG. 1 shows a satellite printing unit with a central cylinder 3, four each with this one pressure nip forming cylinders 1 and these associated cylinders 2.
  • the four cylinders 1 form two printing cylinder pairs 4, 5 and are all employed on the central cylinder 3 and transmit a printed image on the fabric to be printed ,
  • FIG. 2 shows a satellite printing unit with a central cylinder 3 and two pairs of pressure cylinders 4, 5 which are each formed by printing cylinders 1, which are located across the central cylinder 3 diagonally opposite. While the one printing cylinder pair 4 is present at the central cylinder and prints, the second pair of printing cylinders 5 is turned off by central cylinder 3 and does not print. In this state, on the second Pair of printing cylinders 5 preparatory work, eg printing plate change by means of a printing form manipulator, are carried out in the run of a print production change.
  • preparatory work eg printing plate change by means of a printing form manipulator
  • the printing cylinder 1 When changing production, the printing cylinder 1 can first be turned off from the central cylinder 3 together. After this pair of cylinders 4 has reached its end position, then the prepared pair of pressure cylinders 5 can be made to the central cylinder 3. In this case, the central cylinder 3 would run for a short period of time without salaried printing cylinder 1, which means that the printing web does not experience any guidance through the pressure gaps formed between printing cylinder pair 4, 5 and central cylinder 3 over this period of time.
  • the pressure cylinder pair 5 can be made to the central cylinder, so that for a moment all four printing cylinder 1 pending and print on the central cylinder 3, and only in the second cut the pair of printing cylinders 4 are released from the central cylinder 3 and moved into the assembly position.
  • the central cylinder is in this case always a pair of pressure cylinders 4, 5, the pressure path is at any moment without guidance through the nip.
  • a third alternative is the simultaneous turning on and off of the pairs of cylinders 4, 5. This solution takes less time than the sequential stopping and hiring the impression cylinder pairs 4, 5, but also leaves the pressure path for this shortened period of time without guidance through the pressure column.
  • the forces acting on the central cylinder 3 forces of the printing cylinder pair 4 are represented by the arrows F1 and F2. It can be seen that the forces acting on the central cylinder 3, are the same size but opposite. This means that just at the critical moment of the employment of the printing cylinder pair 4, 5 never a sudden one-sided load of the central cylinder 3 occurs, but at any moment a balance of Anstell concept on the central cylinder 3 prevails. This will be a one-sided deformation of the central cylinder 3 is avoided, which reduces the risk of damage to the central cylinder by one-sided load, whereby the maintenance intervals are extended and its life is increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

L'invention concerne une presse rotative, de préférence une rotative à bobines, comprenant un groupe d'impression qui comporte un cylindre central (3) et deux cylindres d'impression (1) formant chacun avec le cylindre central (3) une ligne de contact. Selon l'invention, les deux cylindres d'impression (1) sont diamétralement opposés vis-à-vis du cylindre central et ils forment une paire de cylindres d'impression (4, 4, 5, 5), les cylindres d'impression d'une paire pouvant être approchés du cylindre central (3) ou éloignés de celui-ci uniquement simultanément.

Claims (9)

  1. Machine à imprimer rotative
    a) comportant un groupe d'impression avec un cylindre central (3) et deux cylindres d'impression (1) qui forment chacun un espace d'impression avec le cylindre central (3),
    b) dans laquelle les deux cylindres d'impression (1) sont agencés diagonalement opposés l'un à l'autre par rapport au cylindre central (3), et
    c) les deux cylindres d'impression (1) forment une paire de cylindres d'impression (4 ; 5) qui peuvent être appliqués uniquement simultanément vers le cylindre central (3) ou écartés uniquement simultanément depuis le cylindre central (3),
    d) dans laquelle le groupe d'impression comporte deux cylindres d'impression supplémentaires (1) qui sont agencés diagonalement opposés l'un à l'autre par rapport au cylindre central (3), et les deux cylindres d'impression supplémentaires (1) forment une paire de cylindres d'impression supplémentaire (4 ; 5) qui peuvent être appliqués uniquement simultanément vers le cylindre central (3) ou écartés uniquement simultanément depuis le cylindre central (3),
    caractérisée en ce que
    e) la machine à imprimer rotative est configurée de telle sorte que lorsque les deux paires de cylindres d'impression (4 ; 5) sont appliquées sur le cylindre central (3) ou écartées depuis celui-ci, la première/seconde paire de cylindres d'impression (4 ; 5) est appliquée avant la seconde/première paire de cylindres d'impression (5 ; 4) dans le temps ou écartées après la seconde/première paire de cylindres d'impression (5 ; 4) dans le temps.
  2. Machine à imprimer rotative selon la revendication 1, dans laquelle un cylindre gravé (2) est associé à chacun des cylindres d'impression (1).
  3. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, dans laquelle les première et seconde paires de cylindres d'impression (4 ; 5) peuvent être appliquées simultanément sur le cylindre central (3) ou écartées simultanément depuis celui-ci.
  4. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, dans laquelle l'application des paires de cylindres d'impression (4 ; 5) vers le cylindre central (3) et l'écartement des paires de cylindres d'impression (4 ; 5) depuis le cylindre central (3) est provoqué par un dispositif de commande mécanique ou électronique.
  5. Machine à imprimer rotative selon la revendication précédente, dans laquelle le dispositif de commande permet uniquement une application ou un écartement simultané des paires de cylindres d'impression (4 ; 5) vers/depuis le cylindre central (3).
  6. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, dans laquelle le cylindre gravé (2) présente un diamètre variable lorsque vu sur sa longueur de telle sorte qu'un diamètre de cylindre de préférence identique sur les deux côtés de cylindre augmente de manière continue des deux côtés jusqu'au centre du cylindre.
  7. Machine à imprimer rotative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il s'agit d'une presse rotative à bobines.
  8. Procédé d'échange de revêtements dans une machine à imprimer rotative comportant un groupe d'impression satellite, dans lequel quatre cylindres d'impression (1) formant un espace d'impression avec un cylindre central (3) forment deux paires de cylindres d'impression (4 ; 5), dans lequel les cylindres d'impression (1) formant respectivement une paire sont diagonalement opposés, et les cylindres d'impression (1) sont appliqués sur le cylindre central (3) et écartés depuis celui-ci uniquement par paires.
  9. Procédé selon la revendication précédente, dans lequel lorsque les cylindres d'impression (1) sont appliqués, des forces (F1 ; F2) agissant perpendiculairement des cylindres d'impression (1) agencés diagonalement opposés l'un à l'autre sur l'axe de rotation (R) du cylindre central (3) soulèvent réciproquement.
EP06775158A 2005-09-16 2006-08-28 Approche et eloignement en diagonale de cylindres porte-blanchets au niveau d'un cylindre satellite Not-in-force EP1928661B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510044440 DE102005044440B4 (de) 2005-09-16 2005-09-16 Diagonales An- und Abstellen von Gummituchzylindern an einen Satellitenzylinder
PCT/CH2006/000465 WO2007030959A1 (fr) 2005-09-16 2006-08-28 Approche et eloignement en diagonale de cylindres porte-blanchets au niveau d'un cylindre satellite

Publications (2)

Publication Number Publication Date
EP1928661A1 EP1928661A1 (fr) 2008-06-11
EP1928661B1 true EP1928661B1 (fr) 2012-06-06

Family

ID=37335112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06775158A Not-in-force EP1928661B1 (fr) 2005-09-16 2006-08-28 Approche et eloignement en diagonale de cylindres porte-blanchets au niveau d'un cylindre satellite

Country Status (3)

Country Link
EP (1) EP1928661B1 (fr)
DE (1) DE102005044440B4 (fr)
WO (1) WO2007030959A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US942923A (en) * 1908-03-27 1909-12-14 American Lithographic Co Printing-press.
US2042060A (en) * 1934-10-26 1936-05-26 John Waldron Corp Multicolor printing machine
US2542229A (en) * 1946-12-16 1951-02-20 Albert M Bojanower Plate cylindfr and ink roll mounting for printing presses
DD137557A1 (de) * 1978-07-17 1979-09-12 Harald Feustel Druckeinheiten von offset-rollenrotationsmaschinen
FR2485990A1 (fr) * 1980-07-03 1982-01-08 Holweg Const Mec Dispositif pour le changement automatique de cylindres d'une imprimeuse flexographique
DE4447859B4 (de) * 1994-10-04 2007-02-22 Maschinenfabrik Wifag Rollenrotationsdruckmaschine
DE10210561B4 (de) * 2002-03-09 2004-11-04 Metronic Ag Vorrichtung zum Einstellen und Halten der Abstände der Gummituchzylinder einer Mehrzahl von Druckwerken einer Satelliten- Bogenrotationsdruckeinheit zu einem gemeinsamen Gegendruckzylinder

Also Published As

Publication number Publication date
DE102005044440B4 (de) 2007-09-13
EP1928661A1 (fr) 2008-06-11
DE102005044440A1 (de) 2007-03-29
WO2007030959A1 (fr) 2007-03-22

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