EP2058122A1 - Procédé et dispositif destinés à la gravure de cylindres d'impression - Google Patents

Procédé et dispositif destinés à la gravure de cylindres d'impression Download PDF

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Publication number
EP2058122A1
EP2058122A1 EP08018931A EP08018931A EP2058122A1 EP 2058122 A1 EP2058122 A1 EP 2058122A1 EP 08018931 A EP08018931 A EP 08018931A EP 08018931 A EP08018931 A EP 08018931A EP 2058122 A1 EP2058122 A1 EP 2058122A1
Authority
EP
European Patent Office
Prior art keywords
engraving
printing cylinder
elements
printing
strand
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
EP08018931A
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German (de)
English (en)
Other versions
EP2058122B1 (fr
Inventor
Michel Walter Ulrich
Jan Hermann Breiholdt
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.)
Hell Gravure Systems GmbH and Co KG
Original Assignee
Hell Gravure Systems GmbH and Co KG
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.)
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Publication date
Application filed by Hell Gravure Systems GmbH and Co KG filed Critical Hell Gravure Systems GmbH and Co KG
Publication of EP2058122A1 publication Critical patent/EP2058122A1/fr
Application granted granted Critical
Publication of EP2058122B1 publication Critical patent/EP2058122B1/fr
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Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a method and a device for engraving printing cylinders for packaging printing and similar printing applications in an electronic engraving machine, in which an engraving element engraved elements to be printed, in particular from wells engraved in the printing cylinder, and the engraving element for planar engraving a feed movement parallel to Executes longitudinal axis of a printing cylinder, wherein in order to shorten the engraving time, when a print image or layout for a respective printing cylinder is subdivided into at least two axially adjacent engraving strands, each Engraving a Engraving is assignable.
  • An electronic engraving machine for engraving printing cylinders is known.
  • An engraving element with an engraving stylus controlled by an engraving control signal as a cutting tool moves in the axial direction along a rotating impression cylinder.
  • the engraving stylus engraves wells arranged in an engraving grid in the lateral surface of the printing cylinder.
  • the engraving control signal is obtained by superimposing a periodic screen signal with image signal values representing the tonal values to be engraved. While the raster signal causes an oscillating stroke movement of the engraving stylus to engrave the cups arranged in the engraving frame, the image signal values determine the geometric dimensions of the cells in accordance with the tonal values to be engraved.
  • laser engraving tools could also be considered as engraving elements.
  • cylindrical flexographic printing plates could also be engraved.
  • the object of the present invention is to improve a method and a device for engraving printing cylinders for packaging printing and similar printing applications in such a way that the times required for engraving the printing cylinders are shortened without causing visible seams in the engraved image.
  • the respective white area to be taken into consideration should extend at least in one width of an engraving line around the circumference of the printing cylinder, but according to the invention it is also advantageously possible to distribute it over the circumference and / or the longitudinal extent of the printing cylinder also to use different widths and / or long white areas in an economical manner according to the invention for a more economical, time-saving engraving with optional multiple engraving organs.
  • the engraving organs can be of the same or different type, in particular operate mechanically and / or with electromagnetic radiation.
  • an automatic determination of the strand boundary is possible in that a rapid feed forward information is used, which is deposited for a faster driving over a white area by an engraving.
  • Fast feed information is deposited for wider white areas in which the number of engraving tracks of the white area exceeds a predetermined number. This number is expediently chosen so that the time saved by the fast feed rate justifies the effort required to define a white area as a fast feed area and to create and store the fast feed information.
  • Information about white areas can be determined in various ways: in a prepress system during the generation of the engraving data, in a separate calculation run on a corresponding workstation or on the engraving machine itself.
  • the engraving format is explicitly communicated to the engraving machine by manual entry or by a digital order bag in a so-called "job ticket".
  • the engraving machine then automatically determines the ideal strand boundary between two engraving strands as well as the design or the course of these engraving strands.
  • the strand boundary preferably becomes a white area located in the center of the printing cylinder
  • the strand boundary is expediently arranged as close as possible to the axial center of the printing cylinder so that approximately the same time is required for the engraving of the engraving strands to be engraved by the two engraving elements.
  • the printing cylinder is also according to the invention preferably engraved with only one engraving element. Accordingly, according to the invention, the decision as to whether and, where appropriate, where a strand boundary is established, is made dependent on the condition which time saving actually results in the division into engraving strands and the use of several engraving elements. This time saving is expediently calculated by the engraving machine or the electronic data processing on the basis of the engraving data, the information about the white areas or the fast feed information.
  • a cylinder layout can be designed according to the invention by positioning the elements to be engraved in a workstation under visual control on a monitor and the strand boundaries appear in the design of the cylinder layout.
  • the engraving elements are preferably positioned before engraving on predetermined by the strand boundaries axial engraving start points.
  • a print image or layout for a respective printing cylinder is subdivided into at least two engraving strands lying next to one another in the axial direction, each engraving strand is assignable to an engraving element, which in an independent solution of the object is characterized according to the invention by the engraving device provided for engraving the respective printing cylinder or one this associated or assignable electronic data processing device at least one strand boundary between Engierstrlinden in at least one ungraviert remaining white area between elements to be printed automatically can be specified, even independent protection is claimed.
  • the device according to the invention is moreover preferably characterized in that at least two engraving elements are arranged on supports or carriages movable independently of one another in the axial direction of a printing cylinder.
  • the engraving elements or their supports or their carriages can preferably be moved with at least one linear drive.
  • the engraving elements can in particular have engraving styli and / or laser engraving tools.
  • FIGS. 1 to 3 the cited above DE 100 10 904 A1 are taken.
  • the device according to the invention can remain essentially unchanged externally with respect to this known device, but according to the invention, the method to be carried out with this device changes according to the invention and / or the more internal training and / or device of the device, in particular the programming or other preparation of a workstation.
  • Fig. 1 shows a schematic block diagram of an engraving machine with a printing cylinder 1, which is rotationally driven by a cylinder drive 2.
  • a printing forme 3 for packaging printing or similar printing applications to be engraved.
  • the printing form 3 consists of a multiplicity of elements 4 to be engraved, referred to below as engraving elements, whose composition and position within the printing form 3 are defined by a cylinder layout created before the engraving.
  • the subdivision of the printing form 3 in the Engraving A, B takes place in a preferred manner based on the cylinder layout automatically or automatically by the engraving machine itself such that the strand boundaries between the engraving 4 and a preferably each engraving 4 a Engraving A, B by the Engraving 5 A , 5 B of Engraving A, B is completely engraved in order to save on the one hand engraving time and on the other hand by mechanical tolerances of the engraving 5 conditional to avoid visible seams in an engraving 4.
  • the engraving elements 5 A , 5 B are mounted in the illustrated embodiment on individual engraving supports 6 A , 6 B , which are displaceable on an engraving 7 in the axial direction of the printing cylinder 1 on axial Engierstartaff SP A and SP B and locked there.
  • the engraving carriage 7 is axially movable on the impression cylinder 1 by means of a spindle 8 and an engraving carriage drive 9, preferably at least one linear drive could instead be used.
  • the engraving supports 6 A , 6 B can be axially positioned on the engraving carriage 7 by means of manually operated precision drives or by means of motor drives, which can also be done more elegantly by a linear drive or by the linear drive according to the invention.
  • the common engraving 7 can preferably be omitted by the individual Graviersupporte 6 A , 6 B are coupled, for example via detachable nut segments directly to the spindle 8, and in any case be formed as independent engraving 7, which increases the flexibility of the device according to the invention, also preferably one or more linear drives could be used instead.
  • Each engraving element 5 A , 5 B cuts with its engraving stylus or laser tool 10 A , 10 B engraving in a Gravurraster arranged wells or other printing elements in the lateral surface of the rotating printing cylinder 1, while the respective engraving 7 with the engraving 5 A , 5 B. moved axially on the printing cylinder 1 along.
  • the engraving takes place, for example, on individual engraving lines extending in a circle around the impression cylinder 1 in the circumferential direction, the engraving carriage 7 executing an axial feed step to the next engraving line each time after the engraving line has been engraved.
  • Such an engraving method is for example in the U.S. Patent 4,013,829 described.
  • the engraving may also be in a helical shape take place about the printing cylinder 1 extending engraving line. In this case, the engraving carriage 7 moves continuously along the printing cylinder 1 during the engraving.
  • the engraving styluses 10 A , 10 B of the engraving organs 5 A , 5 B are controlled by engraving control signals GS A and GS B.
  • the engraving control signals GS A and GS B are formed in engraving amplifiers 11 A , 11 B from the superimposition of a periodic screen signal R on a line 12 with image signal values B A and B B on lines 13 A, 13 B , which contain the tonal values of the cells to be engraved between Represents "light" (white) and "depth” (black).
  • the periodic raster signal R causes a vibrating lifting motion of the engraving tool 10A, 10B for engraving the engraving screen disposed in the wells, the image signal values A and B B B corresponding to the tonal values to be engraved, the geometrical dimensions of the engraved cells.
  • the analog image signals B A and B B are obtained in D / A converters 14 A , 14 B of engraving data GD A and GD B of the engraved printing plate 3, which are stored in engraving data 15 A , 15 B , and from this engraving line for Engraving line and the D / A converters 14A, 14B via data lines 16 A , 16 B are supplied.
  • the engraving locations in the engraving grid are defined by spatial coordinates (x, y) of an XY coordinate system assigned to the printing cylinder 1 whose Y axis is oriented in the circumferential direction of the printing cylinder 1 (engraving direction) and its X axis in the axial direction of the printing cylinder 1 (feed direction).
  • a position transmitter 17 which is mechanically coupled to the impression cylinder 1 generates the y-location coordinates and the engraving carriage drive 9 the corresponding x-location coordinates of the engraving locations on the impression cylinder 1.
  • the location coordinates (x, y) are fed via lines 18, 19 to an engraving control unit 20 which controls the Engraving processes controls.
  • the engraving control unit 20 generates read addresses and corresponding read clock sequences from the location coordinates (x, y) which are fed to the engraved data stores 15 A , 15 B via data lines 21 A , 21 B.
  • the raster signal R on the line 12 and various control signals for controlling the cylinder drive 2 and the engraving carriage drive 9 are also obtained.
  • the cylinder layout of the printing form 3 to be engraved is designed, for example, by an operator off-line in a workstation 22 by manually positioning the engraving elements 4 by means of a cursor or by entering position coordinates under visual control on a control monitor 23 and pixel by pixel in the form of layout data in the workstation 22 saved.
  • strand boundaries running in the cylinder layout between the engraving elements 4, in the exemplary embodiment a strand boundary are automatically determined by the workstation 22 (see also FIGS 5 and 6), which engraving strands to be engraved 3 (A, B) and divide the cylinder layout into corresponding layout areas.
  • determining the strand boundaries are suitably the dimensions of the printing cylinder 1, the possible axial feed paths of the engraving 5 A , 5 B or the possible axial feed path of the engraving carriage 7 and possibly also the distance of the engraving 5 A , 5 B or engraving 7 taken from each other.
  • the specified string limits are marked accordingly in the layout data.
  • the engraving data GD A and GD B engraving line for engraving line are compiled in the workstation 22 from the engraving data (GD *) of the individual engraving elements 4 on the basis of the layout regions defined in the cylinder layout ,
  • the engraving data (GD *) of the engraving elements 4 are obtained, for example, by scanning originals with a scanner and / or by mounting the individual documents in an image processing system.
  • an engraving stylus 10 A , 10 B when engraving a tonal value "Super White” does not touch the lateral surface of the printing cylinder 1 and thus does not engrave a cup.
  • the engraving elements 5 A , 5 B or the engraving styluses 10 A , 10 B can also be lifted off the lateral surface of the printing cylinder 1 by suitable control signals.
  • the generated in the workstation 22 engraving data GD A and GD B are transferred via data lines 24 A , 24 B in the corresponding engraved data memory 15 A , 15 B.
  • position data PD such as the x-location coordinates of the Engierstartembl SP A and SP B in the Engraving A, B, transmitted via a data line 25 to the control unit 20 and stored there at the same time.
  • Fig. 2 shows for clarity a cylinder layout 26, which is divided by a strand boundary 27 in two layout areas 26 A , 26 B. Also shown is an engraving line 28 which is composed of an engraving line sections 28 'belonging to the engraving elements 4 * and of "empty" engraving line sections 28 ".
  • Fig. 3 shows an example of an engraving process. Shown is the printing cylinder 1 with the engraved printing form 3, which is composed of the engraving elements 4 and the two Engraving A, B, which are separated by the strand boundary 27 from each other.
  • the engraving organs 5 A , 5 B are positioned on the engraving start points SP A and SP B of the engraving strands A, B.
  • the positioning is carried out by axial displacement of the engraving 6 A , 6 B on or with the engraving 7.
  • the positioning of the engraving 5 A , 5 B on the Engierstartcurs SP can be based on the position shown in the workstation 22 PD, controlled by Engraving controller 20, done automatically.
  • the engraving of Engierstrlinde A, B is performed.
  • the engraving elements 5 A , 5 B at the fixed distance d from each other are moved from the starting position in the X direction on the printing cylinder 1 along.
  • the first engraving organ 5 A engraves the first engraving strand A from the engraving start point SP A to the point P A1 .
  • the second engraving element 5 B engraves the second engraving strand B from the engraving start point SP B to the point P B and thereby moves from the engraving start point SP B to the point P B , while the first engraving element 5 A at a fixed distance d of the engraving 5 A , 5 B are moved from the engraving start point SP A to the point P A2 .
  • the printing form was engraved directly on the printing cylinder. It is within the scope of the invention to engrave the printing plate on printing plates, which are clamped on a printing cylinder.
  • Fig. 4 shows a second example of a cylinder layout for packaging printing.
  • elements 4 are provided.
  • a strand boundary 24 has been laid between strands A and B.
  • the strand boundary 24 has been positioned in the axial center of the cylinder layout, so that for engraving the two Engraving strands A and B on both sides of the strand boundary 24 by means of the two Engraving 5 A , 5 B of each engraving 5 A and 5 B requires about the same time becomes.
  • arrows S is indicated have been that in the engraving machine for the white areas W corresponding fast feed information S have been deposited in order to drive over the white areas W fast.
  • Fig. 5 2 shows an example of a monitor image for optimizing the engraving time on a monitor 23 A , 5 B depending on the positioning of the strand boundary 24 result. As you can see, the time differences are significant, and thus the possible time savings.
  • the white areas are in Fig. 5 shown as gray areas, while the engraving elements are shown in light.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Making Paper Articles (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP08018931A 2007-11-09 2008-10-30 Procédé et dispositif destinés à la gravure de cylindres d'impression Active EP2058122B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007053909A DE102007053909B4 (de) 2007-11-09 2007-11-09 Verfahren und Vorrichtung zur Gravur von Druckzylindern

Publications (2)

Publication Number Publication Date
EP2058122A1 true EP2058122A1 (fr) 2009-05-13
EP2058122B1 EP2058122B1 (fr) 2011-04-13

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Application Number Title Priority Date Filing Date
EP08018931A Active EP2058122B1 (fr) 2007-11-09 2008-10-30 Procédé et dispositif destinés à la gravure de cylindres d'impression

Country Status (4)

Country Link
US (1) US8164800B2 (fr)
EP (1) EP2058122B1 (fr)
AT (1) ATE505327T1 (fr)
DE (2) DE102007053909B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4241992A1 (fr) 2022-03-09 2023-09-13 AKK GmbH Gravure laser multiple

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109656388B (zh) * 2018-12-19 2022-07-01 湖北银琅兴科技发展有限公司 一种特殊定位光标的制作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508734B1 (de) 1975-02-28 1976-08-12 Hell Rudolf Dr Ing Gmbh Verfahren zur Herstellung von Druckformen
JPH06143533A (ja) * 1992-10-30 1994-05-24 Dainippon Screen Mfg Co Ltd グラビア製版出力装置
US5894354A (en) * 1993-02-25 1999-04-13 Ohio Electronic Engravers, Inc. Method and apparatus for engraving patterns with and without image feedback
DE19947397A1 (de) 1999-10-01 2001-05-03 Heidelberger Druckmasch Ag Verfahren zur nahtlosen Gravur von Mustern
DE10010904A1 (de) 2000-03-07 2001-09-13 Heidelberger Druckmasch Ag Verfahren zur Gravur von Druckzylindern

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351009A (en) * 1966-03-24 1967-11-07 Edward M Plank Printing plate blank with elastomeric backing
DE3339552A1 (de) * 1983-11-02 1985-05-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Voreinstellen an druckmaschinen
JP2001071449A (ja) * 1999-09-06 2001-03-21 Mitsubishi Heavy Ind Ltd 高速書込製版装置
DE10116672B4 (de) 2000-04-08 2007-03-08 Hell Gravure Systems Gmbh Verfahren und Vorrichtung zur Materialbearbeitung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508734B1 (de) 1975-02-28 1976-08-12 Hell Rudolf Dr Ing Gmbh Verfahren zur Herstellung von Druckformen
US4013829A (en) 1975-02-28 1977-03-22 Dr. -Ing. Rudolf Hell Gmbh Method for the production of printing forms
JPH06143533A (ja) * 1992-10-30 1994-05-24 Dainippon Screen Mfg Co Ltd グラビア製版出力装置
US5894354A (en) * 1993-02-25 1999-04-13 Ohio Electronic Engravers, Inc. Method and apparatus for engraving patterns with and without image feedback
DE19947397A1 (de) 1999-10-01 2001-05-03 Heidelberger Druckmasch Ag Verfahren zur nahtlosen Gravur von Mustern
DE10010904A1 (de) 2000-03-07 2001-09-13 Heidelberger Druckmasch Ag Verfahren zur Gravur von Druckzylindern

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4241992A1 (fr) 2022-03-09 2023-09-13 AKK GmbH Gravure laser multiple
WO2023170113A1 (fr) 2022-03-09 2023-09-14 Akk Gmbh Gravure par multiples lasers

Also Published As

Publication number Publication date
DE102007053909B4 (de) 2009-08-13
DE102007053909A1 (de) 2009-06-04
DE502008003156D1 (de) 2011-05-26
US20090122353A1 (en) 2009-05-14
ATE505327T1 (de) 2011-04-15
EP2058122B1 (fr) 2011-04-13
US8164800B2 (en) 2012-04-24

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