EP0906193B1 - Verfahren zur herstellung von prägeplatten - Google Patents

Verfahren zur herstellung von prägeplatten Download PDF

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Publication number
EP0906193B1
EP0906193B1 EP97928209A EP97928209A EP0906193B1 EP 0906193 B1 EP0906193 B1 EP 0906193B1 EP 97928209 A EP97928209 A EP 97928209A EP 97928209 A EP97928209 A EP 97928209A EP 0906193 B1 EP0906193 B1 EP 0906193B1
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EP
European Patent Office
Prior art keywords
engraving
tool
substructure
engraved
line
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
EP97928209A
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German (de)
English (en)
French (fr)
Other versions
EP0906193A1 (de
Inventor
Wittich Kaule
Karlheinz Mayer
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.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient 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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Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP0906193A1 publication Critical patent/EP0906193A1/de
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/30112—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/301176—Reproducing means
    • Y10T409/301624—Duplicating means
    • Y10T409/30168—Duplicating means with means for operation without manual intervention
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303752—Process
    • Y10T409/303808—Process including infeeding

Definitions

  • the invention relates to a method for producing embossing plates, in particular Steel intaglio printing plates according to the preamble of claim 1.
  • embossing plates in particular steel intaglio printing plates, as they usually do when printing high-quality printed products, such as securities, banknotes or the like, has so far been used resorted to the embossing plates in a complex process to have it made by an artist.
  • the artist in the metal plate such as steel or copper.
  • Manufactured panels are characterized by their high quality in terms of Use in the steel gravure printing process.
  • the correction options are extremely low for the artist in the production of the plate. If this original plate is damaged or lost, no identical plate can be found Plate, because each plate is an individual production.
  • From DE 30 08 176 C2 is also known for engraving a Printing cylinder to use a laser.
  • a template is scanned and the resulting signal via an analog-digital converter used to control the laser, with the engraved well defined Depth and extent are introduced into the impression cylinder.
  • the object of the invention is accordingly to propose a method with which a simple and automated production of stamping plates, especially steel gravure printing plates is possible.
  • the invention is based on the knowledge that it is possible to use a two-dimensional Treat line art graphically so that the present Lines are interpreted as areas. These areas are covered by Boundaries limited, these edges defining a target contour of the surface. Starting from this target contour, a tool path is now determined, along which an engraving tool can be guided so that material is removed within the area that is limited by the target contour.
  • the engraving tool is controlled so that the material inside the target contour in the form of continuous or broken lines in one certain depth profile is removed.
  • This depth profile can go through determines a constant or variable depth value within the target contour his.
  • a data processing system is preferred in the method according to the invention used, with the help of which it is possible to create two-dimensional Capture, save and process line templates.
  • the two-dimensional line template which is generated, for example, in a computer or read in via input devices, can be done with the help of a suitable Computer programs are processed so that data for Control of an engraving tool along a tool path.
  • the two-dimensional Line template defines a surface element that, for example, in a single Line of the line template exists.
  • the edge surrounding the line defines then a target contour that is free of crossings.
  • For the production of the engraving is a depth profile as the target depth for the inside of the surface element Engraving assigned and then from the target contour data and the assigned A tool path along which the engraving tool calculates the desired depth is guided and removes material within the surface element.
  • the speed of manufacture of the Embossing plate can be increased significantly.
  • the method also offers simple correction options by changing the data of the line drawing.
  • the exact one Reproducibility of the engraving to be introduced also leads to that printing plates can also be produced directly without one to have to use the galvanic impression process.
  • several different engraving tools are controlled so that they simultaneously process a plate, so that the Processing time is optimized.
  • the method according to the invention is based on a two-dimensional line template 1, which consists of a simple black line 2 on a light background 3 to represent the principle according to the invention.
  • the template z. B. is available on paper, can be digitally recorded in a computer with the aid of a scanner or other suitable data input means.
  • guilloche lines or other graphic elements could be generated with the aid of implemented programs, with which the interactive input or specification of data is just as possible as the calculation of the structures with the aid of random algorithms.
  • line template 1 defines a surface, for example surface 4, which represents a partial surface of the plate.
  • a target contour 5 is defined by the edge of this surface, which serves as the first of two elements as the basis for the later calculation of a tool path along which the embossing plate is to be engraved.
  • the assignment of a depth profile within the target contour is required, which is referred to as the so-called target depth. This can, for example, be specified constantly for the entire engraving. It can also depend on the shape of the engraving tool used.
  • a tool path 10 lying within the surface 4 is then calculated, along which the engraving tool has to be moved, so that the engraving corresponding to the line drawing can be introduced into the embossing plate. Since different engraving tools can be used to engrave the plate, it is clear that data of the respective engraving tool are also included in the calculation of the tool path. For example, when using a laser beam, the width of the beam that acts on the embossing plate can be included in the calculation. When using a mechanical stylus, the stylus shape and here in particular the shape of the tip or its radius of curvature are of essential importance when calculating the tool path.
  • the engraving tool is used after determining the tool path controlled so that it moves within the area 4, when engraving the target contour 5 is not violated and the surface 4 in the predetermined target depth 6 removes.
  • the number "7” is as shown in Fig. 2a from dashes 7.
  • Using the procedure described above become 7 areas from the present strokes as shown in Fig. 2 (b) 8 defined, the edges of which form the target contours 9. These serve as Starting point for the calculation of a tool path.
  • tool paths 10, 11 and 12 are determined along which the engraving tool is controlled over the embossing plate is so that the line drawing are transferred to the embossing plate can.
  • These tool paths are exemplarily shown in Fig. 2 (c).
  • Prefers the tool paths 10, 11 and 12 are determined so that the tool is guided along the desired contours 9 within the surfaces 8 without violating the target contours.
  • FIG. 3 (a) becomes a surface element 8 defined, which has a contour line 9.
  • the tool path 13 as shown in Fig. 3 (b), based on this predetermined data calculated, depending on the dimensioning of the surface 8 and Shape of the engraving tool, the engraving tool in one revolution Do not completely remove the area to be removed.
  • the stylus 14 rotates about its own axis z and carries 15 material from the embossing plate after penetration into the embossing plate along the tool path 13 at a predetermined depth. Through the Guide of the rotating stylus 14 along the tool path 13 remains Target contour line 9 unharmed. Because of the limited width of the stylus however, a residual surface 16 of the surface 8 to be removed in one revolution of the Engraving tool can not be removed. Only in a further work step can the remaining surface 16 with the help of a second predetermined Tool path that differ in shape from the first tool path 13 can be removed.
  • Tool paths 18, 19 and 20 in shape of tool path 12 however have a different dimension than the tool path 12.
  • the remaining surface 16 can be correspondingly be removed with the help of tool paths that are parallel to the contour run, i.e. the same distance from the contour line in every point exhibit.
  • FIG. 6 (a) in a cross section through an embossing plate 15, a tool path was calculated from the contour line 9, along which the Engraving tool was guided and wherein an engraving line 28 is generated which includes a remaining surface 16 to be engraved.
  • an engraving line 28 is generated which includes a remaining surface 16 to be engraved.
  • the remaining surface 16 can be any, but preferably one of the already procedures described above can be applied. Regardless of the respective Process is defined at the bottom of the engraving of the remaining surface Roughness structure created by the offset and shape of the engraving tool is determined.
  • Such a roughness structure is shown in Fig. 6 (b) shown, with a pointed, rotating engraving stylus during engraving was used with which the embossing plate in a defined Depth T was removed.
  • the stylus used pointed to the exit surface a diameter D from the embossing plate and was Removal of the remaining area offset by the amount d / 2 during the Offset in the example shown in Fig. 6 (c) is 3/4 d.
  • the engraving tool was the same as that shown in Fig. 5 (c) in both examples Tool paths are moving.
  • the surface structuring described at the base of the embossing has the production of rotogravure plates has several advantages. Because with the Up to now, the use of steel intaglio printing plates has been limited line widths printable, which is due to the fact that the steel gravure printing ink can only be introduced in engravings of the plate that a certain have maximum width. However, this obstacle is new Proposed engraving eliminated, because now at the bottom of the engraving Roughness can be set as a basic pattern, which as a color catcher can serve for an intaglio printing ink. So this can be Keep color in very wide engraving lines, so that it is now possible for the first time will also print wide lines using the gravure printing process.
  • the roughness of the bottom can be shown control the amount of offset of the engraving tool. Because in the calculation the tool path also different offset widths of the stylus The roughness can be taken into account in different areas the remaining surface at the bottom can be designed differently and thus the engraving line or surface with an additional modulation of the roughness of the basic pattern, so that it is also possible to add more Information in an engraving line solely through the targeted production of the Roughness of the basic pattern.
  • the contour lines become 20 together with a target depth that is fixed in this case Tool path 23 calculated along which a first engraving takes place.
  • a any remaining area is, as already described above, removed at a predetermined target depth.
  • the inside of the line drawing 19 lying surface 21 is in the same way in a tool path 24 implemented, the basis of the implementation being the contour of the surface 21 and a second target depth different from the first when determining the tool path is included. In this way, engravings can be made generate additional information over a larger area include that in the application of the steel gravure process can be transferred to the document.
  • the tapered edges of the line drawing 19 can by a suitable Selection of the stylus shape can be represented exactly. It is possible to use a single fine stylus for the engraving or after the Engraving of the surface with a coarse stylus, the tapered edges with a fine stylus. As an alternative to this option can also adjust the depth profile to the requirements of the area to be engraved 19 can be adjusted. In this case, the depth profile is specified so that the engraving tool on the tapered edges less material removes, so that especially when using a rotating mechanical Graver the graver from the material to be processed comes out and due to its conical shape the worn line becomes narrower. These two techniques can also be used for exact Use engraving on corners or edges
  • a determined target contour with an engraving depth profile combined so that a tool path is determined from these two data along which the engraving tool is guided so that the material according to the line drawing corresponding to the depth profile Depth can be removed.
  • the depth profile i.e. the target depth can be a constant for each individual engraving line or for the engraving as a whole be specified.
  • Target depths for individual engraving lines can also be used or parts of engraving lines are different, so that the respective Tool path is modulated accordingly.
  • different engraving tools of the same or different types to be used in successive process steps to achieve the desired To produce the engraving result.
  • rotating mechanical It is particularly advantageous to use different stylus tips, to use shapes and sizes, so that optimal Embossing plates can be created.
  • the embossing result can be influenced in a variety of ways. Because the shape and size of the embossing tool depend on Depth of penetration of the engraving tool into the plate the shape of the so produced Engraved cross-sectional area. In Fig. 9 are two examples of possible ones Cross-sectional areas of stylus tips shown. The stylus tip is in Fig. 9a shaped so that the line of intersection 28 of the cone shell to the axis of rotational symmetry S of the engraving tool forms an angle of 45 °. This creates an engraving path when the plate is engraved with this tool, whose side walls are also at an angle of 45 ° to the Due to the engraving.
  • This example shows that by producing engraving tools with different angles different wall inclinations are produced in the engraving plate can be.
  • the wall shape can also be used influence the shape of the engraving tool.
  • Fig. 9b Cross-sectional line 29 of a rotationally symmetrical engraving tip shown with whose help in different engraving depths different degrees of angle Engraving walls can be made. From these two examples is can be seen that the use of different engraving tools desired engraving result significantly influenced or that with the help of special manufactured engraving tools or engraving tool tips for a specific Line art optimal results can be achieved.
  • the engraving tools in their angulation and shape produce that very fine surfaces to be engraved are removed can, with fine lines the tool path along which the engraving tool only once within the area to be removed is guided along the predetermined line. Due to the special shape of the engraving tool, the material is within the target contour removed by a single working path of the engraving stylus. In these In some cases, the tool path can also run along a center line that lies between two target contour lines and has the same distance from both. At Given the depth profile, a suitable stylus shape must then be selected.
  • the inventive method offers the decisive advantage that the Engraving with exact lines even with extremely small engraving areas or lines can be carried out exactly.
  • the target depths in the invention Processes can be achieved are preferably between 10 and 150 ⁇ m, with the target depths also being different Gray values of the line template can be specified.
  • the template is of an even line pattern a guilloche
  • a visible information such as a portrait become.
  • another, e.g. B. bring machine-readable information in this way.
  • the method according to the invention can also be used if a negative image of the line template is to be created.
  • the previously described calculation of the tool path also be carried out if within the area to be removed there is another surface area 25 which is to be left out of the removal.
  • the tool path is preferably calculated so that the engraving tool the workpiece, d. H. in a first step travels so that the embossing plate is removed along the nominal contour line 26 becomes.
  • the engraving tool is along the second Target contour 27 guided, while one may still be between the target contours 26 and 27 remaining area, as already described above, is cleared out.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Surface Treatment Of Glass (AREA)
EP97928209A 1996-06-17 1997-06-16 Verfahren zur herstellung von prägeplatten Expired - Lifetime EP0906193B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19624131A DE19624131A1 (de) 1996-06-17 1996-06-17 Verfahren zur Herstellung von Prägeplatten
DE19624131 1996-06-17
PCT/EP1997/003120 WO1997048555A1 (de) 1996-06-17 1997-06-16 Verfahren zur herstellung von prägeplatten

Publications (2)

Publication Number Publication Date
EP0906193A1 EP0906193A1 (de) 1999-04-07
EP0906193B1 true EP0906193B1 (de) 2001-10-04

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ID=7797166

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Application Number Title Priority Date Filing Date
EP97928209A Expired - Lifetime EP0906193B1 (de) 1996-06-17 1997-06-16 Verfahren zur herstellung von prägeplatten

Country Status (16)

Country Link
US (1) US6840721B2 (enrdf_load_stackoverflow)
EP (1) EP0906193B1 (enrdf_load_stackoverflow)
JP (1) JP2000512231A (enrdf_load_stackoverflow)
AR (1) AR007596A1 (enrdf_load_stackoverflow)
AT (1) ATE206356T1 (enrdf_load_stackoverflow)
AU (1) AU3259297A (enrdf_load_stackoverflow)
BG (1) BG64251B1 (enrdf_load_stackoverflow)
CA (1) CA2258663C (enrdf_load_stackoverflow)
DE (2) DE19624131A1 (enrdf_load_stackoverflow)
ES (1) ES2165066T3 (enrdf_load_stackoverflow)
PL (1) PL186295B1 (enrdf_load_stackoverflow)
PT (1) PT906193E (enrdf_load_stackoverflow)
RU (1) RU2183558C2 (enrdf_load_stackoverflow)
UA (1) UA46854C2 (enrdf_load_stackoverflow)
WO (1) WO1997048555A1 (enrdf_load_stackoverflow)
ZA (1) ZA975252B (enrdf_load_stackoverflow)

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BG64251B1 (bg) 2004-07-30
AR007596A1 (es) 1999-11-10
RU2183558C2 (ru) 2002-06-20
UA46854C2 (uk) 2002-06-17
ES2165066T3 (es) 2002-03-01
CA2258663C (en) 2007-10-23
JP2000512231A (ja) 2000-09-19
AU3259297A (en) 1998-01-07
PT906193E (pt) 2002-02-28
DE59704798D1 (de) 2001-11-08
ZA975252B (en) 1998-01-05
US20010043842A1 (en) 2001-11-22
EP0906193A1 (de) 1999-04-07
WO1997048555A1 (de) 1997-12-24
US6840721B2 (en) 2005-01-11
PL330529A1 (en) 1999-05-24
ATE206356T1 (de) 2001-10-15
CA2258663A1 (en) 1997-12-24
PL186295B1 (pl) 2003-12-31
BG103049A (en) 1999-07-30

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