EP1262315B1 - Méthode et dispositif de fabrication d'une plaque d'impression - Google Patents

Méthode et dispositif de fabrication d'une plaque d'impression Download PDF

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Publication number
EP1262315B1
EP1262315B1 EP01112705A EP01112705A EP1262315B1 EP 1262315 B1 EP1262315 B1 EP 1262315B1 EP 01112705 A EP01112705 A EP 01112705A EP 01112705 A EP01112705 A EP 01112705A EP 1262315 B1 EP1262315 B1 EP 1262315B1
Authority
EP
European Patent Office
Prior art keywords
beams
printing block
relief
track
block blank
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
EP01112705A
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German (de)
English (en)
Other versions
EP1262315B8 (fr
EP1262315A1 (fr
Inventor
Josef Juffinger
Franz Kurz
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.)
SPGPrints Austria GMBH
Original Assignee
Stork Prints Austria 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8177543&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1262315(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stork Prints Austria GmbH filed Critical Stork Prints Austria GmbH
Priority to AT01112705T priority Critical patent/ATE282526T1/de
Priority to ES01112705T priority patent/ES2233522T3/es
Priority to DE50104541T priority patent/DE50104541D1/de
Priority to EP01112705A priority patent/EP1262315B8/fr
Priority to JP2002148852A priority patent/JP3556204B2/ja
Priority to CNB02120473XA priority patent/CN1208190C/zh
Priority to US10/154,837 priority patent/US6857365B2/en
Publication of EP1262315A1 publication Critical patent/EP1262315A1/fr
Priority to HK03104677.9A priority patent/HK1052320B/zh
Publication of EP1262315B1 publication Critical patent/EP1262315B1/fr
Publication of EP1262315B8 publication Critical patent/EP1262315B8/fr
Application granted granted Critical
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
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B19/00—Photoelectronic composing machines
    • 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
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam

Definitions

  • the invention relates to a method and an apparatus for manufacturing a printing form according to claims 1 and 17.
  • a printing form can it be z.
  • B. a flexographic printing form or a rigid printing form act as letterpress or gravure forms, and the like.
  • a printing plate which can be a polymer plate, for example, in order to produce a relief in the printing plate in this way in order to produce a flexographic printing plate with the aid of a conventional CO 2 laser.
  • the CO 2 laser is permanently power-modulated, so that the method is relatively slow.
  • This US-A-5,427,026 also discloses an apparatus for manufacturing a Printing form with a holder for holding a printing form blank, one optical device for irradiating a surface of the printing form blank along a track by means of at least one beam, to thereby pass areas remove the printing form blank, and with a control device, the using a data file contained beam on and off commands Changes in intensity of the at least one beam along its path controls the track, the control device being designed so that it several data files each containing beam switch-on and switch-off commands Provides, each for processing the printing blank serves along the entire track, and which is offset in time with respect to the track are workable.
  • the invention has for its object a method for producing a Printing form. in particular a flexographic printing plate to specify with which very small structures surrounded by deep cuts quickly and just have it made.
  • a suitable for this purpose Device will be provided.
  • the method according to the invention is characterized by this. that the irradiation done with multiple beams. the one after the other along the same Track and the multiple beams in one direction next to each other are arranged horizontally, which runs transversely to the longitudinal direction of the track.
  • a relief introduced that material of Printing blank is removed along traces by radiation, So by radiation that z. B. is switched on and off, for example by Modulators, e.g. B. acousto-optical modulators, light deflectors, such as movable Mirrors, etc. to change the intensity of the radiation.
  • Modulators e.g. B. acousto-optical modulators, light deflectors, such as movable Mirrors, etc.
  • the removal occurs because along one and the same Track differently deep relief areas by accordingly frequent irradiation are generated. It can focus radiation be used or parallel radiation, provided they are for the named Purpose is intense or powerful enough.
  • the beam power can be relatively low be, which means that even very fast modulators and switching off the beam power can be used in their Use the beam power just needs to be limited to the To protect modulators from destruction, such as acousto-optic modulators. So it is possible to also be relatively fine and to be able to quickly develop deep structures at the same time to create reliefs to be able to manufacture with even better quality. This also applies in particular in view of the fact that between the individual burning processes the printing plate material when forming the deeper structural areas cools down again before it is removed again, which leads to that the printing form material does not heat up so much in these areas, so that the relief is extremely precise or true to form leaves. The material removal can occur between the individual burning processes also be dissipated, e.g. B. be sucked off, which is a more accurate Working at the next removal process enables and qualitatively better Structures leads.
  • the relief delimits material areas on the surface side of the printing form blank first removed in this way the relief contours at a relatively low temperature of the blank to be able to determine. Only then is the further removal of the Printing blank for the formation of the lower areas.
  • the approach is to use very precise surface borders of the relief. In principle, however, the reverse procedure is also used possible that the surface-side borders of the relief be formed last.
  • the relief surface is on the side limiting material areas of the printing form blank in their spectral sensitivity to the wavelength of the abrading radiation adjusted, which affects the removal process of these material areas controls even better to get reliefs with even greater precision receive.
  • the irradiation of the Printing blank with laser radiation because in this way the required Radiant energy can be easily provided.
  • focused laser radiation can be used.
  • the Beams or laser beams are moved relative to the printing form blank, or it is proceeded in such a way that the printing form blank is relatively stationary Blasting is moved.
  • the jets and blank can also be used both and are moved relative to each other.
  • a printing blank that has a printing surface has forming elastic material, such as polymer material, silicone or rubber.
  • the printing surface could also be rigid, for example are made of metal.
  • a plate-shaped printing form blank made of polymer material or other suitable elastic material on the surface a rotatably mounted cylinder and firmly attached there are, for example by clamping, by suction using a vacuum, by Magnets, etc.
  • elastic can also be used or polymer material on the surface of a rotatably mounted Cylinders are drawn up or applied. This can be e.g. B. are hoses that are pulled onto the cylinder, or it can liquid material or polymer material by knife, spray and Diving, etc., are applied.
  • the irradiation takes place of the printing form blank along a respective track depending of data files, one of which is one of the different ones Depth relief areas to be removed is assigned.
  • the removal the material areas of the printing form blank are therefore purely digital controlled so that changes in radiation power are carried out very quickly can be what accelerates the machining process.
  • the Data files can also be combined into an overall file that contains the data files as links in a chain, which are processed one after the other become.
  • the data files Invention produced as follows: Education and electronic storage of a basic two-dimensional relief pattern; Formation of one or more in different borders to the basic relief pattern for marking relief areas that increase with increasing Distance from the basic relief pattern should be lower; Drawing a track by the bordered basic relief pattern; Searching for boundaries of the Relief basic pattern and the relief areas based on the borders on the track; and setting beam on and off commands based on the boundaries found and sorted into respective data files for the basic relief pattern and the lower-lying relief areas.
  • the basic relief pattern is specified, for example by scanning a template or by graphic design from a designer on the screen of a computer, so with a given track width and Traces of the tracks relative to the basic relief pattern to be removed in the blank in different depths Create areas in a very simple way, in an automated way, which also speeds up the process.
  • the respective data files are used for modulation or for switching on / off of rays.
  • these could be Data files are used to control acousto-optical modulators, with the help of which the beams or laser beams are switched on and off become, and the functioning of which is generally known.
  • the respective data files can be different Control voltages assigned to modulate the beams to be one of the respective when using a respective data file Use control voltages to control a modulator.
  • the respective Control voltage is then in accordance with the data file connected. This switched control voltage then reaches the modulator.
  • a device for producing a printing form
  • a flexographic printing form contains a holder for holding a Printing form blank; an optical device for irradiating a Surface of the printing form blank along a track by means of at least a beam to thereby ablate areas of the printing form blank; and a controller that uses a beam on and off commands contained data files corresponding changes in intensity of the at least one ray on its way along the track controls.
  • the control device is designed so that it has several each Data files containing beam switch-on and switch-off commands (sample information) provides, each of which is used for processing the printing form blank serves along the entire track, and which is offset in time with respect to the track are workable.
  • the data files related to one and the same track can go along areas the track may be exposed to radiation one or more times, accordingly to get shallower or deeper areas along the track so that it is possible very short in the longitudinal direction and create deep recesses in order to be very to obtain precise reliefs in the surface of a printing form blank.
  • the optical device trained so that she outputs several beams, each with only a separate data file are controllable.
  • all rays must be on the same track go through one after the other.
  • the rays are juxtaposed in one direction which runs transverse to the longitudinal direction of the track, so that by appropriate Shifting the beams in the transverse direction one after the other Cover with the track can be brought.
  • Focused rays such as focused rays, can be used as rays Laser beams.
  • the printing form blank can be a plate-shaped blank or be a cylindrical printing form blank. At least he's at his Surface elastic and preferably consists of polymer material or at least contains one. But it can also be made of silicone, Rubber or other material, such as metal.
  • this can be done in the form of a plate Training, for example, can be processed in a flat state if Rays guided along tracks and kept parallel to him at a distance become. Radiation sources and blank blank could then be in parallel planes are shifted relative to each other.
  • the printing form blank designed as a cylinder rotatably mounted about its longitudinal axis, which has an elastic material on its surface, for example polymer material. wearing.
  • This can be plate-shaped and around its Surface. It is in the form of a plate on the cylinder surface attached, the plate can be removed from this after processing can also be removed to be used as a flat pressure plate become.
  • the elastic or polymer material can also be firmly on the Surface of the cylindrical carrier remain after it is on it has been raised or applied in another form, such as by a Dipping, doctoring or spraying, and the like. In this case later the entire cylinder was used as an impression cylinder.
  • the surface relief When processing or irradiating the printing cylinder for generation the surface relief can be rotated while at the same time a slidably arranged in the direction of the longitudinal axis of the cylinder Carriage is moved, the at least parts of the optical device wearing.
  • This slide can be used, for example, to deflect mirrors of laser beams, or laser sources can be directly on it be mounted. It is also possible when the cylinder rotates around its longitudinal axis this also in the direction of its To move the longitudinal axis to the surface of the printing form blank to be able to edit fixed positioned optical equipment. This variant would be advantageous if the optical device itself from a Variety of radiation sources for generating a variety of rays exists and therefore a misalignment by vibrations is relatively large.
  • modulators are provided for switching the beams on and off are that can be controlled via the data files.
  • it can are preferably acousto-optic modulators that are very can be controlled quickly.
  • Each of the modulators is equipped with at least one analog switch connected, via which the modulator one of the pattern information appropriate control voltage can be supplied, the analog switch through which the data file can be switched. This makes a very precise digital Control of the processing beam or laser beam possible.
  • modulators each of which is assigned an analog switch is, each by one of the for engraving along a track required multiple data files can be switched, the analog switch switch different control voltages.
  • FIG. 1 denotes a printing form blank, which is made of polymer material is made.
  • a flexographic printing plate becomes a relief engraved in a surface 2 of the printing form blank 1 by using Help from z. B.
  • three focused laser beams 3, 4 and 5 polymer material the printing form blank 1 is burned away in some areas. It could more or less than three laser beams can also be used.
  • the laser beams 3, 4 and 5 are sequentially along in time a track running on the surface 2 moves in the direction arrow 6 runs.
  • the laser beam 3 is the leading laser beam and acts on the surface 2 of the printing form blank 1 first.
  • the laser beam is used first 1 the upper section A of the printing form blank 1 burned away while a short time later the section lying below the bottom of section A. B is burned away using the laser beam 4. At even deeper Recess becomes after using the laser beam 4 below the floor Section C of section B with the aid of the laser beam 5 burned away, etc.
  • the laser beams 3, 4 and 5 create relief areas, in which relatively deep recesses are created should be irradiated several times in succession in order to be successive in time Steps the bottom of the first recess burn further away or dig.
  • the printing form blank according to FIG. 1 can be, for example, one act as a plate-shaped blank that is processed in a flat state, or around a cylindrical printing form blank, for example on the Surface of a rotatably mounted cylinder lies and from this again is removable.
  • the cylinder itself could also be used as a blank be referred to when it is on its surface, for example with polymer material would be coated.
  • the laser beams 3, 4 and 5 could have different powers according to an embodiment of the invention.
  • the leading laser beam 3 could, for example, have a lower power than the two lagging laser beams 4 and 5, in order to be able to use the laser beam 3 to better define the edges of the relief at a relatively low power. Lower-lying areas of recesses could then be burned away with the more powerful laser beams 4 and 5.
  • a CO 2 laser beam with 100 watts could be used as laser beam 3
  • laser beams 4 and 5 are CO 2 lasers each with 200 watts.
  • the laser beams themselves are focused using lenses 7, 8 and 9, which is why these lenses can be in the same plane, for example, however have different focal lengths, depending on the depth of the laser beams area to be burned.
  • the lens 7 has the shortest Focal length and the lens 9 the longest focal length.
  • FIG. 2 shows a variant of the principle shown in FIG. 1.
  • an upper region 10 of the printing form blank 1 and the laser beam 3 for processing this upper region 10 are spectrally matched to one another.
  • the surface of the printing form blank 1 is coated in the upper region 10 with a corresponding material which is particularly sensitive to the wavelength of the laser beam 3.
  • the laser beam 3 can z. B. generated by a YAG laser whose wavelength is 1.060 microns.
  • the beam itself can have an output of 50 to 100 watts.
  • a beam waist in the focus of approximately 10 ⁇ m is obtained, so that extremely fine structures can be produced in the surface area of the printing form blank 1.
  • the material in the area 10 must be selected so that it can be easily burned away by the laser beam 3.
  • the remaining laser beams 4 and 5 can in turn be generated by CO 2 lasers of 200 watts each, in order to be able to burn away deeper areas at a distance from the relief edges. Not so high accuracy is required here, so that beam waists of 30 to 35 ⁇ m in the focus area can be accepted.
  • Figures 1 and 2 show how the relief structures socketed become.
  • the laser beams 3, 4 and 5 in the track direction 6 on different places in the track direction 6 switched off. It follows then a stair-shaped base course, the slope of the flanks corresponds approximately to the course of the focused laser radiation.
  • the base flanks are designated in Figures 1 and 2 with 11, 12 and 13.
  • FIG. 3 shows a basic relief pattern 14 in the form of a uniformly blackened pattern Range.
  • This basic relief pattern 14 represents the printing Area and must be on the circumferential side of lower lying areas 15, 16 and 17 be surrounded. The material of the printing form blank 1 must therefore be in areas 15, 16 and 17 are burned away.
  • the resulting one Structure can be seen in Figure 4. This is a cross section along the line A-A in Figure 3.
  • the one shown in FIG. 3 is used to switch the laser beams on and off Relief basic pattern 14 used.
  • the basic relief pattern can be shown first and in an electronic Memory can be cached. Then there are traces set on which the laser beams are guided when the relief is engraved. It is assumed that line A-A in Figure 3 is such a trace.
  • the basic relief pattern 14 can be previously or then be provided with borders 18, 19, inside and outside to define the areas 15, 16, 17 in which the material of the Printing blank 1 to be burned away. At the intersections the track A-A in Figure 3 with the basic relief pattern or the borders 18, 19 then there are switch-on points for the laser beams which, sorted according to the areas to be combined into data files.
  • the data files D3, D4 and D5 each have values "1" and "0" and serve for controlling acousto-optical modulators, which in turn are used for Switching the laser beams 3, 4 and 5 can be used.
  • the beginning of a Track in Figure 5 at X 0, so that the first time through the track using the Laser beam 3 burned the areas 17, 16 and 15 over the section A. until the laser beam 3 is switched off at X3.
  • the switch-on and switch-off points or data files can be made after production the borders 18 and 19 and defining the track A-A and the track direction generated automatically with the help of suitable computer programs become.
  • FIG. 6 shows the structure of a device according to the invention Production of a printing form, such as a flexographic printing form.
  • the device includes a laser engraver with a machine bed 20.
  • the one to be engraved is here hollow-cylindrical trained printing blank 1 rotatably mounted.
  • the Printing blank 1 on a central shaft 20a on the machine bed 20 designated camps is added.
  • a motor 21 the printing form blank 1 can be rotated about its central axis.
  • Encoder 22 or rotary pulse generator is used to generate pulses, which correspond to the respective rotational position of the printing form blank 1.
  • a carriage 23 is on guides 24 parallel to the axis of the printing form blank 1 moves.
  • a screw 25 is used to drive this Carriage 23 along the guides 24, the screw 25 is rotated in one direction or the other via a drive 26 to take the carriage 23 accordingly.
  • Each of these lasers has its own shutter, its own modulator and assigned its own lens system.
  • the machine control 33 is provided to control the operation of the system. which via control lines with the lasers 27a-27c, the modulator 30, the rotary drive 26, the motor 21 and the rotary encoder 22 connected is.
  • CAD system 34 which is connected to a control computer 35, which in turn is used for control the machine control 33 is used.
  • a designer can view the associated screen design a pattern, such as the basic relief pattern shown in FIG. 3 14.
  • the designer can then use the appropriate commands on the CAD system 34 borders 18 and 19 relative to the basic relief pattern 14 Define the areas in which the surface of the printing form blank 1 should be removed outside the basic relief pattern.
  • the designer can also determine the track A-A in Figure 3, along later the printing form blank 1 is to be engraved.
  • the CAD system 34 calculates then the pattern information or data files shown in FIG. 5, where the number of data files corresponds to the number of areas that are removed should be. This is done using, as already stated several successively used Laser beams take place.
  • the sample information or data files D3 to D5 then become the control system from the CAD system 34 35 transferred and stored there, eventually to be processed to be fed to the machine control 33.
  • This ensures the rotation the printing form blank 1 about its central axis, for the corresponding Displacement of the carriage 23 along the laser beams 27a-27c the predetermined track on the surface of the printing form blank 1 lead, and for switching the laser beams 27a-27c on and off in accordance with the data files D3 to D5 using the modulators 30a-30c, which are designed here as acousto-optical modulators.
  • the focused laser beams 28a to 28c run up helical traces over the surface of the printing form blank 1.
  • the focused laser beam 28a goes ahead and initially engraves Surface areas that correspond to areas A in Figure 4.
  • the focused laser beam 28b travels along it helical trace, engraving areas that match the areas B in Figure 4 correspond.
  • the same track will be focused Laser beam 28c swept to cover the areas along the track engrave that correspond to areas C in Figure 4.
  • the power of the focused laser beams control by about different high voltages at the control input of the acousto-optic modulators created and in accordance with the corresponding data files be switched. Block operation would also be possible here only cylindrical tracks can be traversed.
  • FIG. 7 A second embodiment of the device according to the invention is shown in Figure 7.
  • the carriage 23 is fixed here, so it is no longer in the longitudinal direction of the cylinder-shaped printing form blank 1 is displaceable. Rather, the printing form blank 1 is now in its cylinder longitudinal direction slidably mounted, for which purpose it is now arranged on the guides 24 is and z. B. is driven by means of the screw 25, the in turn rotated in one direction or the other by the rotary drive 26 becomes.
  • This arrangement is advantageous if a large number of lasers are used at the same time Machining of the printing form blank 1 can be used because this multitude of lasers is then no longer stable and low-vibration enough to be transported on a movable carriage.

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  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Laser Beam Processing (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (27)

  1. Procédé de fabrication d'une plaque d'impression, dans lequel un relief est ménagé dans la surface d'une ébauche (1) de plaque d'impression de telle sorte que le matériau de l'ébauche (1) de plaque d'impression soit enlevé par un rayonnement le long de pistes, des zones en relief (A, B, C) de profondeurs différentes étant produites à chaque fois le long d'une et même piste par une irradiation répétée de manière adéquate,
       caractérisé en ce que l'irradiation est effectuée au moyen de plusieurs rayons (3, 4, 5) dirigés les uns après les autres le long de la même piste et en ce que les différents rayons sont disposés les uns à côté des autres dans une direction qui s'étend transversalement à la direction longitudinale de la piste.
  2. Procédé selon la revendication 1, caractérisé en ce que les zones en relief (A, B, C) de profondeurs différentes sont enlevées par des rayonnements de puissance différente.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les zones en relief (A, B, C) de profondeurs différentes sont enlevées par un rayonnement de longueur d'onde différente.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que les zones en relief (A) situées directement sur la surface (2) de l'ébauche (1) de plaque d'impression sont enlevées par des rayonnements dont la puissance est plus faible et/ou dont la longueur d'onde est plus courte que celle(s) des rayonnements qui servent à enlever des zones en relief (B, C) plus profondes.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'on enlève d'abord les zones du matériau de l'ébauche de plaque d'impression délimitant le relief du côté de la surface.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'on adapte les zones (A) du matériau de l'ébauche de plaque d'impression (1) délimitant le relief du côté de la surface dans leur sensibilité spectrale à la longueur d'onde du rayonnement d'élimination.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'irradiation de l'ébauche (1) de plaque d'impression s'effectue par un rayonnement laser, par exemple par un rayonnement laser focalisé.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que les rayons sont déplacés par rapport à l'ébauche de plaque d'impression (1).
  9. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que l'ébauche de plaque d'impression (1) est déplacée par rapport à des rayons fixes.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce qu'on irradie une ébauche de plaque d'impression comportant un matériau polymère.
  11. Procédé selon la revendication 10, caractérisé en ce qu'on place une ébauche de plaque d'impression en forme de plaque en matériau polymère sur la surface d'un cylindre monté à rotation sur des paliers.
  12. Procédé selon la revendication 10, caractérisé en ce que, pour former une ébauche de plaque d'impression (1), on tire, ou on dépose, du matériau polymère sur la surface d'un cylindre monté à rotation sur des paliers.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce que l'irradiation de l'ébauche de plaque d'impression (1) le long d'une piste correspondante s'effectue en fonction de fichiers de données (D3, D4, D5) auxquels est associée à chaque fois une des zones en relief (A, B, C) à enlever qui se trouve à des profondeurs différentes.
  14. Procédé selon la revendication 13, caractérisé en ce qu'on génère les fichiers de données (D3, D4, D5) de la façon suivante :
    formation et enregistrement électronique d'un motif de base en relief (14) bidimensionnel ;
    formation d'une ou de plusieurs bordures (18, 19) placées à différentes distances par rapport au motif de base en relief pour repérer des zones en relief (15, 16, 17) qui doivent être plus profondes lorsque la distance par rapport au motif de base en relief (14) augmente ;
    tracé d'une piste (A-A) au travers du motif de base en relief (14) à bordure ;
    recherche des limites (X3, X4, X5) du motif de base en relief (14) et des zones en relief (15 à 17) au moyen des bordures sur la piste ; et
    définition d'ordres d'enclenchement et de déclenchement de rayonnement au moyen des limites trouvées et triées dans des fichiers de données correspondants (D3, D4, D5) pour le motif de base en relief (14) et les zones en relief plus profondes (15 à 17).
  15. Procédé selon la revendication 14, caractérisé en ce qu'on utilise les fichiers de données correspondants (D3 à D5) pour moduler les rayons.
  16. Procédé selon la revendication 15, caractérisé en ce que, à chaque fichier de données (D3 à D5), sont associées à chaque fois des tensions de commande différentes pour moduler les rayons.
  17. Dispositif de fabrication d'une plaque d'impression, comprenant :
    un support pour soutenir une ébauche (1) de plaque d'impression ;
    un système optique (27) pour irradier une surface (2) de l'ébauche de plaque d'impression (1) le long d'une piste au moyen d'au moins un rayon (28) pour ainsi enlever des zones de l'ébauche de plaque d'impression (1) ; et
    un système de commande qui commande des modifications d'intensité d'au moins un rayon sur son trajet le long de la piste en utilisant un fichier de données contenant des ordres d'enclenchement et de déclenchement de rayonnement, dans lequel :
    le système de commande est réalisé de telle sorte qu'il dispose de plusieurs fichiers de données (D3 à D5) contenant à chaque fois des ordres d'enclenchement et de déclenchement de rayonnement qui servent chacun au traitement de l'ébauche de plaque d'impression (1) le long de toute la piste et peuvent être traités de manière décalée dans le temps par rapport à la piste, caractérisé en ce que le système optique est réalisé de telle sorte qu'il génère plusieurs rayons (28a à 28c) qui, à chaque fois, peuvent être commandés uniquement par un des fichiers de données (D3 à D5), et
    les rayons sont disposés les uns à côté des autres dans une direction qui s'étend transversalement à la direction longitudinale de la piste.
  18. Dispositif selon la revendication 17, caractérisé en ce que les rayons sont des rayons lasers.
  19. Dispositif selon la revendication 17 ou 18, caractérisé en ce que l'ébauche de plaque d'impression (1) est réalisée sous la forme d'un cylindre monté à rotation sur des paliers autour de son axe longitudinal et qui porte un matériau élastique, par exemple un matériau polymère, sur sa surface.
  20. Dispositif selon la revendication 19, caractérisé en ce qu'un chariot (23) est prévu coulissant dans la direction de l'axe longitudinal du cylindre, ce chariot supportant au moins des parties du système optique.
  21. Dispositif selon la revendication 19, caractérisé en ce que le cylindre est susceptible de coulisser dans la direction de son axe longitudinal et le système optique est positionné de manière fixe.
  22. Dispositif selon l'une des revendications 17 à 21, caractérisé en ce qu'on prévoit des modulateurs (30) pour commander l'intensité des rayons, ces modulateurs pouvant être commandés au moins indirectement par les fichiers de données (D3 à D5).
  23. Dispositif selon la revendication 22, caractérisé en ce qu'un modulateur respectif (30a à 30c) est relié à au moins un commutateur analogique qui permet de fournir une tension de commande au modulateur et en ce que le commutateur analogique est susceptible d'être commuté par le fichier de données (D3 à D5).
  24. Dispositif selon la revendication 23, caractérisé en ce qu'on prévoit plusieurs modulateurs (30a à 30c), auxquels est associé à chaque fois un commutateur analogique et qui peuvent être commutés à chaque fois par l'un des différents fichiers de données (D3 à D5) nécessaire à la gravure le long d'une piste, et en ce que les commutateurs analogiques commutent à chaque fois des tensions de commande différentes (figures 6, 7).
  25. Dispositif selon l'une des revendications 22 à 24, caractérisé en ce que les modulateurs (30a à 30c) sont des modulateurs opto-acoustiques.
  26. Dispositif selon l'une des revendications 22 à 24, caractérisé en ce que les modulateurs sont des déflecteurs ou des plaques de déviation.
  27. Dispositif selon l'une des revendications 17 à 26, caractérisé en ce que les rayons sont des rayons focalisés.
EP01112705A 2001-05-25 2001-05-25 Méthode et dispositif de fabrication d'une plaque d'impression Expired - Lifetime EP1262315B8 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AT01112705T ATE282526T1 (de) 2001-05-25 2001-05-25 Verfahren und vorrichtung zur herstellung einer druckform
ES01112705T ES2233522T3 (es) 2001-05-25 2001-05-25 Procedimiento y dispositivo para la fabricacion de un molde.
DE50104541T DE50104541D1 (de) 2001-05-25 2001-05-25 Verfahren und Vorrichtung zur Herstellung einer Druckform
EP01112705A EP1262315B8 (fr) 2001-05-25 2001-05-25 Méthode et dispositif de fabrication d'une plaque d'impression
JP2002148852A JP3556204B2 (ja) 2001-05-25 2002-05-23 印刷ブロックを製造する方法及び装置
CNB02120473XA CN1208190C (zh) 2001-05-25 2002-05-24 用于生成一个印版的方法和设备
US10/154,837 US6857365B2 (en) 2001-05-25 2002-05-28 Method and device for producing a printing block
HK03104677.9A HK1052320B (zh) 2001-05-25 2003-07-02 用於生成一個印版的方法和設備

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01112705A EP1262315B8 (fr) 2001-05-25 2001-05-25 Méthode et dispositif de fabrication d'une plaque d'impression

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EP1262315A1 EP1262315A1 (fr) 2002-12-04
EP1262315B1 true EP1262315B1 (fr) 2004-11-17
EP1262315B8 EP1262315B8 (fr) 2005-01-05

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Country Status (8)

Country Link
US (1) US6857365B2 (fr)
EP (1) EP1262315B8 (fr)
JP (1) JP3556204B2 (fr)
CN (1) CN1208190C (fr)
AT (1) ATE282526T1 (fr)
DE (1) DE50104541D1 (fr)
ES (1) ES2233522T3 (fr)
HK (1) HK1052320B (fr)

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DE50104541D1 (de) 2004-12-23
ATE282526T1 (de) 2004-12-15
JP3556204B2 (ja) 2004-08-18
JP2003053928A (ja) 2003-02-26
ES2233522T3 (es) 2005-06-16
HK1052320B (zh) 2005-12-09
CN1387996A (zh) 2003-01-01
EP1262315B8 (fr) 2005-01-05
CN1208190C (zh) 2005-06-29
EP1262315A1 (fr) 2002-12-04
US6857365B2 (en) 2005-02-22
HK1052320A1 (en) 2003-09-11
US20020195012A1 (en) 2002-12-26

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