EP0986469B1 - Procede de fonctionnement d'un organe de gravure - Google Patents

Procede de fonctionnement d'un organe de gravure Download PDF

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Publication number
EP0986469B1
EP0986469B1 EP98934806A EP98934806A EP0986469B1 EP 0986469 B1 EP0986469 B1 EP 0986469B1 EP 98934806 A EP98934806 A EP 98934806A EP 98934806 A EP98934806 A EP 98934806A EP 0986469 B1 EP0986469 B1 EP 0986469B1
Authority
EP
European Patent Office
Prior art keywords
engraving
signal
during
frequency
head
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
EP98934806A
Other languages
German (de)
English (en)
Other versions
EP0986469A1 (fr
Inventor
Siegfried Beisswenger
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0986469A1 publication Critical patent/EP0986469A1/fr
Application granted granted Critical
Publication of EP0986469B1 publication Critical patent/EP0986469B1/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
    • 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

Definitions

  • the invention relates to the field of electronic reproduction technology and relates to a method for operating an engraving member in an electronic Engraving machine for engraving printing forms, especially printing cylinders, for gravure printing.
  • an electromagnetic engraver moves in an electronic engraving machine Engraving organ with an engraving stylus as a cutting tool in axial direction along a rotating pressure cylinder.
  • the one from an engraving signal controlled engraving stylus cuts a sequence of arranged in a grid Wells, called wells, in the outer surface of the printing cylinder.
  • the engraving signal is made by overlaying one of the tonal values between "Black" and "white” representing image signal with a periodic raster signal educated.
  • a vibrating lifting movement of the Engraving stylus to generate the grid controls the image signal accordingly the tonal values to be reproduced the depths of the in the surface of the Printing cylinder engraved cell.
  • the drive system exists for the Engraving stylus essentially from an engraved signal stationary electromagnet, in the air gap of which the armature of a rotating system emotional.
  • the rotating system has an anchor axis Axle bearings and a damping device.
  • One end of the anchor axis is as one resilient torsion bar clamped in place, while the other End carries a lever-like stylus holder for the engraving stylus.
  • the engraving signal creates an alternating magnetic field in the electromagnet generated, which exerts alternating electrical torques on the armature, which counteracts the mechanical torque of the torsion bar.
  • the changing electrical torques cause a vibration movement the anchor axis by angle from the rest position defined by the torsion bar, which are proportional to the amplitudes of the engraving signal.
  • the stylus holder guides the anchor axis with the engraving stylus on the Shell surface of the pressure cylinder aligned lifting movements, which the penetration depths of the engraving stylus in the outer surface of the impression cylinder.
  • the alternating magnetic field in the electromagnet generates alternating current losses in the armature that depend on the frequency of the raster signal.
  • the AC losses heat the anchor, the anchor axis and the stylus holder the engraving stylus slowly from an initial temperature at the start of engraving up to a stable operating temperature during engraving.
  • the warming causes one Extension of the anchor axis and the stylus holder as well as a change in magnetic permeability of the pole shoe of the electromagnet and Anchor.
  • the object of the present invention is therefore to provide a method for operating a Engraving device in an electronic engraving machine for engraving printing forms, especially of printing cylinders for gravure, to improve in such a way that annoying changes in temperature are avoided in order to ensure a good Engraving quality is achieved.
  • a printing cylinder (1) is driven in rotation by a rotary drive (2).
  • An engraving element (4) mounted on an engraving carriage (3) with an engraving stylus as a cutting tool moves with the help of a feed drive (5) driven spindle (6) in the axial direction on the rotating pressure cylinder (1) along.
  • the engraving element (4) is an electromagnetic engraving element in the exemplary embodiment with an electromagnetic drive system for the engraving stylus.
  • An electromagnetic drive system was already in the introduction to the description explained in detail and is known for example from DE 23 36 089 A.
  • the drive system for the engraving stylus can also be used as a solid-state actuator element from an electostrictive, piezocrystalline or a magnetostrictive Material be formed.
  • Engraving organ (4) cuts a series of engraving lines arranged in a grid Cups in the outer surface of the rotating pressure cylinder (1), while the engraving member (4) gradually axially along the printing cylinder (1) emotional.
  • the engraving signal (G) is superimposed on a periodic raster signal (R), also called vibration, with analog image values (B), which between the tonal values of the wells to be engraved Represent "black” and “white", formed in an overlay (9).
  • Raster generator (10) provides the periodic raster signal (R), its frequency is switchable by a control signal (S).
  • the control signal (S) is in a Sequence control (11) generated and the raster generator (10) via a line (12) fed.
  • the engraving data are engraving lines for in an engraving data memory (13) Engraving line in the order required to engrave the impression cylinder (1) filed.
  • Each well to be engraved has an engraving date of at least assigned to a byte, which among other things as engraving information contains serious tonal value between "black” and "white”.
  • the engraving data (GD) are, for example, by dot and line, optoelectronic Scanning of an original to be reproduced obtained in a scanner and then stored in the engraving data memory (13).
  • the engraving data (GD) are read out of the engraving data memory (13) by means of a reading cycle sequence T S and converted into the analog image values (B) in an A / D converter (14) Engraving amplifiers (8) are fed via a line (15).
  • the reading cycle sequence T S is also generated in the sequence control (11) and reaches the engraving data memory (13) via a line (16).
  • the sequence control (11) is synchronized with the rotary movement of the printing cylinder (1) in that a pulse generator (17) mechanically coupled to the rotary drive (2) supplies a synchronous signal to the sequence control (11) via a line (18).
  • the invention proposed the engraving element (4) before the start of engraving and / or to heat during engraving breaks so that the stable operating temperature is approximately reached at the start of engraving and / or during the interruptions in engraving do not decrease significantly.
  • the heating of the engraving element (4) can take place in that it is before the start of engraving and / or during the engraving interruptions with the existing periodic Raster signal is applied. Since the engraving frequency in practice in The audible range lies and the rotary system of the engraving element (4) with the engraving frequency vibrates, but noise can occur.
  • the noise pollution can be significantly reduced if the engraving element (4) for heating before engraving begins and / or during engraving breaks a periodic signal is applied, the frequency of which is greater than the engraving frequency and is chosen such that the rotary system only still vibrates with a small amplitude, i.e. because of its mass of frequency of the periodic signal no longer follows. Nevertheless, by elastic Deformation of parts of the drive system still disturbing noises occur.
  • the periodic signal with ultrasound frequency ensures that required heating of the armature and the armature axis of the engraving member (4) to the operating temperature due to the eddy current losses occurring in the armature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (6)

  1. Procédé de commande d'un organe de gravure d'une machine de gravure électronique pour graver des formes d'impression, notamment des cylindres d'impression pour l'impression en taille douce, selon lequel
    un poinçon de gravure commandé par un signal de gravure (G) et appartenant à l'organe de gravure (4) grave une succession de cuvettes réparties suivant une trame dans le cylindre d'impression (1) en rotation,
    on forme le signal de gravure (G) par la combinaison d'un signal image (B) représentant la valeur de teinte à graver et d'un signal de trame (R) périodique pour générer la trame et
    on guide l'organe de gravure (4) pour graver la surface de la cuvette dans un mouvement d'avancée le long du cylindre d'impression (1), et dans la direction axiale du cylindre d'impression (1),
    caractérisé en ce qu'
    on chauffe l'organe de gravure (4) pour obtenir une bonne qualité de gravure avant le début de la gravure et/ou pendant une interruption de la gravure.
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    avant le début de la gravure et/ou pendant une interruption de gravure on chauffe l'organe de gravure (4) sensiblement à la température de fonctionnement de cet organe de gravure (4) lorsqu'il effectue une gravure.
  3. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    l'organe de gravure (4) reçoit un signal de trame périodique (R) pour être chauffé avant le début de la gravure et/ou pendant une interruption de la gravure.
  4. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    l'organe de gravure (4) reçoit un signal périodique pour être chauffé avant le début de la gravure et/ou pendant une interruption de gravure, et la fréquence du signal est au moins suffisante pour que l'organe de gravure (4) n'oscille qu'avec une amplitude faible qui réduit fortement les émissions de bruit.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    l'organe de gravure (4) reçoit un signal périodique pour être chauffé avant le début de la gravure et/ou pendant une interruption de gravure, la fréquence de ce signal appartenant aux ultrasons pour que les émissions sonores soient inaudibles.
  6. Procédé selon l'une quelconque des revendications 4 ou 5,
    caractérisé en ce que
    le signal périodique est le signal de trame (R) et
    la fréquence du signal de trame (R) avant le début de la gravure et/ou pendant une interruption de gravure est modifiée de la fréquence de gravure à une fréquence plus élevée, de préférence celle des ultrasons.
EP98934806A 1997-06-03 1998-05-27 Procede de fonctionnement d'un organe de gravure Expired - Lifetime EP0986469B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19723184A DE19723184B4 (de) 1997-06-03 1997-06-03 Verfahren zum Betrieb eines Gravierorgans
DE19723184 1997-06-03
PCT/DE1998/001445 WO1998055305A1 (fr) 1997-06-03 1998-05-27 Procede de fonctionnement d'un organe de gravure

Publications (2)

Publication Number Publication Date
EP0986469A1 EP0986469A1 (fr) 2000-03-22
EP0986469B1 true EP0986469B1 (fr) 2001-12-19

Family

ID=7831240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98934806A Expired - Lifetime EP0986469B1 (fr) 1997-06-03 1998-05-27 Procede de fonctionnement d'un organe de gravure

Country Status (7)

Country Link
US (1) US6741369B1 (fr)
EP (1) EP0986469B1 (fr)
JP (1) JP3149193B2 (fr)
CN (1) CN1261307A (fr)
DE (2) DE19723184B4 (fr)
ES (1) ES2167917T3 (fr)
WO (1) WO1998055305A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007045015A1 (de) * 2007-09-20 2009-04-02 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Erzeugung von Mehrnutzen-Stichtiefdruckplatten
AU2008100847A4 (en) * 2007-10-12 2008-10-09 Bluescope Steel Limited Method of forming textured casting rolls with diamond engraving
FR2986737B1 (fr) * 2012-02-14 2014-02-21 Cyllab Processus de gravure electromecanique haute definition de cylindres pour le procede d'impression heliogravure
CN103832049B (zh) * 2014-01-28 2015-09-23 太仓丽盛制版有限公司 凹版制版中二次补充雕刻方法
CN105479923A (zh) * 2014-09-16 2016-04-13 上海运青制版有限公司 一种版辊补雕刻方法
CN105946337B (zh) * 2016-06-24 2018-04-20 无锡欧诺锁业有限公司 一种凹版滚筒的表面图形雕刻装置
CN112497892B (zh) * 2020-12-15 2024-02-02 固高科技股份有限公司 伺服驱动装置及系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7511479U (de) * 1975-09-18 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Anordnung zum Gravieren von Druckformen in einer Druckform-Graviermaschine
US2773163A (en) * 1953-09-28 1956-12-04 Fairchild Camera Instr Co Heatable engraving stylus assembly
US4004924A (en) * 1965-05-17 1977-01-25 Agfa-Gevaert N.V. Thermorecording
DE2132892A1 (de) * 1971-07-02 1973-01-18 Koerting Kiefel Vertriebs Gmbh Verfahren und vorrichtung zum praegen und austrennen von kunststoffteilen
US4095633A (en) * 1977-01-10 1978-06-20 Kimball Jerome W Woodcarver and engraver machine
US4297060A (en) * 1979-11-01 1981-10-27 Ross Byron W Engraving machine
FR2520295B1 (fr) * 1982-01-26 1986-05-09 Herve Fils Sa Perfectionnements aux rotatives d'impression d'un support mince defilant de facon continue
DE4130055A1 (de) * 1991-09-10 1993-03-11 Josef Hobelsberger Verfahren zum anbringen von gravuren auf eine oberflaeche eines eiskoerpers, insbesondere eines solchen aus klareis, sowie eiskoerper mit gravur
US5424845A (en) * 1993-02-25 1995-06-13 Ohio Electronic Engravers, Inc. Apparatus and method for engraving a gravure printing cylinder
US5491559A (en) * 1994-11-04 1996-02-13 Ohio Electronic Engravers, Inc. Method and apparatus for engraving using a magnetostrictive actuator
JP3386707B2 (ja) * 1998-01-28 2003-03-17 富士機械工業株式会社 グラビア印刷装置の集中制御処理システム
DE19952996A1 (de) * 1999-11-04 2001-05-10 Heidelberger Druckmasch Ag Gravierorgan für elektronische Graviermaschine
US6523467B2 (en) * 1999-12-17 2003-02-25 Heidelberger Druckmaschinen Aktiengesellschaft Method for measuring engraving cups
EP1136254B1 (fr) * 2000-03-23 2003-05-28 BASF Drucksysteme GmbH Utilisation de copolymères greffés pour la fabrication d'éléments marquables au laser en relief
US20040007143A1 (en) * 2002-07-09 2004-01-15 Baxter Brent Alan Custom rubber stamp member creating process

Also Published As

Publication number Publication date
JP3149193B2 (ja) 2001-03-26
DE19723184B4 (de) 2006-01-12
JP2000512941A (ja) 2000-10-03
US6741369B1 (en) 2004-05-25
CN1261307A (zh) 2000-07-26
DE59802547D1 (de) 2002-01-31
ES2167917T3 (es) 2002-05-16
EP0986469A1 (fr) 2000-03-22
WO1998055305A1 (fr) 1998-12-10
DE19723184A1 (de) 1998-12-10

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