EP2061659A2 - Dispositif de formation de structures de gaufrage dans une surface d'un cylindre - Google Patents

Dispositif de formation de structures de gaufrage dans une surface d'un cylindre

Info

Publication number
EP2061659A2
EP2061659A2 EP07800626A EP07800626A EP2061659A2 EP 2061659 A2 EP2061659 A2 EP 2061659A2 EP 07800626 A EP07800626 A EP 07800626A EP 07800626 A EP07800626 A EP 07800626A EP 2061659 A2 EP2061659 A2 EP 2061659A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
engraving
stylus
base
distance
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
EP07800626A
Other languages
German (de)
English (en)
Other versions
EP2061659B1 (fr
Inventor
Markus Staub
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.)
Daetwyler Graphics AG
Original Assignee
MDC Max Daetwyler 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 MDC Max Daetwyler AG filed Critical MDC Max Daetwyler AG
Priority to EP07800626A priority Critical patent/EP2061659B1/fr
Publication of EP2061659A2 publication Critical patent/EP2061659A2/fr
Application granted granted Critical
Publication of EP2061659B1 publication Critical patent/EP2061659B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/045—Mechanical engraving heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B3/00—Artists' machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two-dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
    • B44B3/04—Artists' machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two-dimensionally for carving, engraving, or guilloching shallow ornamenting or markings wherein non-plane surfaces are worked

Definitions

  • the controller may comprise computing means for processing the input data, such that, as input data, usual image data for engraving printing cylinders, In particular, halftone data, received and can be transformed such that based on the transformed data, the drive signal can be generated, which is suitable for generating the embossed structures.
  • the user can thus also use the existing methods, devices and computer programs for generating engraving data for the preparation of the embossing process.
  • Halftone data can also be used, resulting in infinitely variable embossing depths.
  • the support-free mechanism can be designed in various ways.
  • the mechanism may, for. B. include an adjustable stop, which limits a spring-driven feed movement of the base of the engraving unit in the direction of the surface of the cylinder.
  • Such a stop can be structurally simple form and store adjustable.
  • existing solutions for conventional sliding feet can essentially be taken over and only have to be supplemented by the adjustable stop.
  • the spring-driven delivery of the engraving unit is retained.
  • the engraving signal is reshaped, ie that the signal amplitude corresponding to the measured distance is amplified or attenuated - in this case, the basic distance is thus already changed at the level engraving signal.
  • the latter possibility can be particularly simple and inexpensive to implement without additional mechanical parts, but it - depending on the tolerances in the cylinder diameter - a reduction in the maximum engraving depth of the engraving system result.
  • a method for engraving large continuous areas of gravure cylinders is known, for example, from EP 0 805 957 B1 (MDC Max Duschwyler AG).
  • a pulse width or pulse width modulated drive signal is generated.
  • the usual sinusoidal signal is omitted.
  • this method is particularly well suited for the production of embossing cylinders.
  • intermediate values can also be engraved in a simple manner. These Intermediate values correspond to areas of the embossed structure which have a smaller depth (or height) than the maximum depth (or maximum height).
  • the device according to the invention comprises a device for extracting chips, wherein a suction opening of this device in the region of the stylus the base of the engraving unit is arranged.
  • the opening is designed so that at this point the exhaust air undergoes maximum acceleration, so that in particular long, thick chips can be sucked in the region of origin, without them getting caught and clog the suction.
  • a further actuator 27 is also arranged on the base plate 1 b of the engraving unit. This cooperates with a stop 28 on the engraving system 1, so that the movement of the engraving system in the direction 22 is limited to the surface 5a of the cylinder, while a movement away from the cylinder surface 5a is not affected by this device rearward.
  • the sliding foot 2 is first retracted by the CPLJ 42 controlled by the drive 24 to the rear. Subsequently, the engraving system 1 is moved so far on the surface 5a of the cylinder 5 that the tip of the stylus 4 in its rest position from the axis of rotation of the cylinder 5 has a distance which the average diameter of the cylinder 5 plus the expected diameter tolerance and a maximum axis error equivalent.
  • FIGS 4A-4D schematically illustrate the processing of an image signal to a drive signal for generating embossed patterns in a die and a male.
  • the image signal 50 corresponds to an image signal as provided for driving engraving machines. It has an amplitude A (t) variable with time t, a high amplitude representing a high color density, the amplitude zero corresponding to full white (no color output and thus no engraving).
  • the image signal 50 is a halftone signal and includes portions corresponding to an intermediate tone between white and full black.
  • the image signal 50 comprises several temporally successive sections 50.1... 50.8, wherein sections 50. 2, 50.
  • the planes to which engraving may also be selected depend on the recesses to be produced, or so that the material to be abraded in each engraving process remains approximately constant from step to step.
  • the surface of the embossing cylinder can, for example, be provided with a layer of chromium for greater durability. Subsequently, the cylinder is ready for use. It can be used in particular in a conventional printing press, as it is used for gravure printing. The gravure printing and the embossing can be performed in the same printing press, but with separate cylinders, in particular by directly successively arranged printing units. This allows for efficient printing and embossing, where desired, the printed pixels and imprints can be precisely registered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

L'invention concerne un dispositif de formation de structures de gaufrage dans une surface (5a) d'un cylindre (5), lequel comprend une unité électromécanique de gravure qui comporte un poinçon (4) monté mobile sur une base de l'unité de gravure pour traiter la surface (5a), un élément d'entraînement (23) qui déplace le poinçon (4) par rapport à la base dans une direction perpendiculaire à la surface (5a) du cylindre ainsi qu'un mécanisme de réglage et de maintien d'une distance de base entre la base de l'unité de gravure et la surface (5a) du cylindre (5). La gravure électromécanique permet de fabriquer rapidement et économiquement des structures de gaufrage sur la surface (5a) d'un cylindre. Le corps brut utilisé pour le cylindre de gaufrage est exemple un cylindre à graver (5) revêtu de cuivre, qui, lorsque les structures de gaufrage ont été réalisées, est doté d'une couche de chrome pour augmenter sa dureté et sa résistance mécanique.
EP07800626A 2006-09-12 2007-09-03 Dispositif de formation de structures de gaufrage dans une surface d'un cylindre Not-in-force EP2061659B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07800626A EP2061659B1 (fr) 2006-09-12 2007-09-03 Dispositif de formation de structures de gaufrage dans une surface d'un cylindre

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06405390A EP1900517A1 (fr) 2006-09-12 2006-09-12 Appareil pour produire des structures gaufrées sur la surface d'un cylindre
PCT/CH2007/000434 WO2008031242A2 (fr) 2006-09-12 2007-09-03 Dispositif de formation de structures de gaufrage dans une surface d'un cylindre
EP07800626A EP2061659B1 (fr) 2006-09-12 2007-09-03 Dispositif de formation de structures de gaufrage dans une surface d'un cylindre

Publications (2)

Publication Number Publication Date
EP2061659A2 true EP2061659A2 (fr) 2009-05-27
EP2061659B1 EP2061659B1 (fr) 2011-05-25

Family

ID=37768755

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06405390A Withdrawn EP1900517A1 (fr) 2006-09-12 2006-09-12 Appareil pour produire des structures gaufrées sur la surface d'un cylindre
EP07800626A Not-in-force EP2061659B1 (fr) 2006-09-12 2007-09-03 Dispositif de formation de structures de gaufrage dans une surface d'un cylindre

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06405390A Withdrawn EP1900517A1 (fr) 2006-09-12 2006-09-12 Appareil pour produire des structures gaufrées sur la surface d'un cylindre

Country Status (3)

Country Link
EP (2) EP1900517A1 (fr)
RU (1) RU2009113606A (fr)
WO (1) WO2008031242A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009532A1 (de) * 2012-05-04 2013-11-07 Hell Gravure Systems Gmbh & Co. Kg Gravierorgan zur Gravur von Druckformen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424845A (en) * 1993-02-25 1995-06-13 Ohio Electronic Engravers, Inc. Apparatus and method for engraving a gravure printing cylinder
EP0741008A3 (fr) * 1995-05-02 1998-05-13 MDC Max Dätwyler Bleienbach AG Appareil pour graver des cylindres d'impression
DE19635831A1 (de) * 1996-09-04 1998-03-05 Hell Ag Linotype Verfahren und Einrichtung zur Steuerung eines Gravierorgans
DE19920207A1 (de) * 1999-05-03 2000-11-09 Heidelberger Druckmasch Ag Verfahren zum Betrieb einer Graviermaschine
DE19952994B4 (de) * 1999-11-04 2006-05-24 Hell Gravure Systems Gmbh Verfahren zur Gravur von Druckzylindern
DE10149828A1 (de) * 2001-10-09 2003-04-30 Hell Gravure Systems Gmbh Verfahren zur Lagekorrektur eines Gravierorgans

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008031242A3 *

Also Published As

Publication number Publication date
RU2009113606A (ru) 2010-10-20
WO2008031242A3 (fr) 2008-07-10
EP1900517A1 (fr) 2008-03-19
EP2061659B1 (fr) 2011-05-25
WO2008031242A2 (fr) 2008-03-20

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