Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
  • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
  • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
  • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
  • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
  • B41J2/0057—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material where an intermediate transfer member receives the ink before transferring it on the printing material

Definitions

• the invention relates to a method and a device for printing a substrate.
• the substrate is printed indirectly, usually by transferring the decorative motifs and colors of the respective printing forme on a suitable transfer roller, such as from DE 10 2004 037 892 B3 is known.
• decor patterns usually divided into motif-related partial prints or sub-images and produce on this basis printing forms for dosing the quantities of ink to be printed.
• Such partial images are also called separations below.
• Techniques for mechanical and control technology synchronization of the individual partial images, so that the entire decor is created by superposition of these, are known in the art.
• pressure-formless processes such as inkjet technology
• inkjet technology can be used for true-to-the-original decorative reproduction when the décor to be printed is divided into color and motif-related suitable separations and then printed separately and sequentially on the substrate to produce the entire decoration become.
• a partial image decomposition into usually different contoured separations and there are those true colors determined with which, based on the printing device used in each case, the most favorable conditions for generating the individual sub-images so that through the contour - And the color overlay of the individual partial images gives the entire decor.
• the true colors are usually not basic colors, but are created by mixing different primary colors.
• Each sub-picture print has correspondingly lower requirements for the print settings, so that the individual sub-pictures can be printed with high precision.
• Techniques for synchronizing the individual partial images, so that the entire decor is created by superposition of these, are known in the art. The result is a printing process in which a decor template can be reproduced true to color with relatively little effort.
• the motif elements are determined in such a way that the most favorable conditions for producing the overall image from the individual partial images result for the printing formless printing device.
• partial images are preferably produced in color separations in such a way that they correspond to the printing units and true colors used in the rotary printing and thus permit an analogue workflow and, if necessary, recourse to existing data, for example the separations, from the prepress stage of the rotary printing.
• the inventive adaptation of the device structure or the respective pressure-free decoration process for generating and applying in particular color-homogeneously partial images can be reproduced in color without compromising a decorative template with comparatively little effort without printing form.
• a decorative dissection and color provision according to claim 2 is completely automatic.
• a color provision according to claim 3 is particularly well suited for decors that can be composed of area-contoured partial images.
• An ink supply according to claim 4 enables indirect contact printing without the need for elaborate color adjustment preparatory work.
• a color drying according to claim 5 enables a fixation and evaluation of individual colors before the next step of decoration production.
• a color provision according to claim 6 makes it possible in particular to print elaborately contoured and difficult-colored partial images.
• color drying according to claim 7 prevents the basic colors from converging when the partial images are formed.
• a transfer body according to claim 8 is particularly advantageous for non-planar substrates.
• Transmission bodies which can be used with corresponding substrates are known, for example, from DE 10 2004 037 892 B3.
• endless plastic profiles can be printed, which are used as edge bands or as window profiles.
• a further object of the invention is to provide a device for substrate printing, with which the printing method according to the invention can be carried out.
• a monitoring device ensures the true to the original color of the print
• a data interface according to claim 14 increases the flexibility of the printing device. The latter can be used to prepare for independent contact printing
• FIG. 3 shows a further embodiment of a printing device
• the substrate 2 can be an endless substrate or endless substrate sections, in particular also an extrudate, for example a plastic profile or an extruded film.
• the substrate 2 is required from right to left in FIG For example, an extrusion feed may be used.
• the substrate 2 is supported by a substrate support not shown in the drawing
• an image acquisition device 4 for example a CCD camera.
• the latter captures a decorative original 6 in a detection region 5 indicated schematically in FIG. 1 in a cone-shaped manner A pattern of the decoration is present on the latter, which is subsequently to be printed on the substrate 2 with the printing device 1.
• the image detection device 4, which has an image data memory, with a central computer 8, for example a PC, is located via a signal line 7
• a control device 10 in signal connection via signal lines 11, 12, 13, 14 is the controller 10 in the execution of Figure 1 with a total of four Farb-Bereitsein ⁇ cht Institute 15, 16, 17, 18 in Signal connection
• the latter have an internal structure which will be described below in connection with the embodiment according to FIG.
• control device 10 Via signal lines 19, 20, 21, 22, the control device 10 is furthermore provided with four pressure-form partial image pressure devices 23, 24 in the embodiment according to FIG. 25, 26 in signal connection
• the color supply units 15 to 18 are included the sub-image inkjet Druckeinnchtungen 23 to 26 via color lines 27, 28, 29, 30 in flight
• the pressure devices 23 to 26 each have a color metering valve 31
• Lower pressure end walls 32 of the printing devices 23 to 26 are each assigned to them Farbubertragungskorpern 33, 34, 35, 36, which are in the form of Ubertragungswalzen spaced by a color application distance A In the execution of Figure 1, this distance A is 1 mm +/- 0.5 mm
• the transfer rollers 33 to 36 have a flexible coating 37 on the shell side.
• the transfer rollers 33 to 36 are driven clockwise, not shown, in FIG. 1 about their perpendicular to the plane of the drawing This rotary drive is synchronized to the advancement of the substrate 2 so that a contact section 38 of the transfer rollers 33 to 36, with which the transfer rollers 33 to 36 come into contact with the substrate 2, is moved synchronously with the substrate 2
• Each transfer roller 33 to 36 is associated with a multifunction module 39.
• the latter serves to clean the transfer rollers 33 to 36 and can also serve for pretreatment, eg activation of the jacket surfaces of the transfer rollers 33 to 36
• the pressure end walls 32 of the transfer rollers 33 to 36 and the upper halves of the transfer rollers 33 to 36 in FIG. 1 are arranged within a housing 40, which protects these sensitive components in particular from contamination and from other influences.
• a color drying device 41, 42, 43, 44 is arranged in each case.
• the latter can be an infrared radiation source which irradiates the printing side of the substrate 2, so that the paint applied freshly by the transfer rollers 33 to 36 is dried.
• the printing device 1 is, as already stated above, designed for printing on endless substrates. Alternatively, it is possible to use the printing device 1 with basically the same structure also for printing a sample substrate. In this case, the printing device 1 is used to calibrate the ink supply devices 15 to 18 and the metering valves 31 and possibly also the drive means for the transfer rollers 33 to 36 and the color drying devices 41 to 44.
• the calibration data obtained are stored in a memory 45 of the controller 10 and can over a data interface 46 for controlling the printing of the target substrate, so for example an endless plastic profile can be used.
• Fig. 2 shows another embodiment of a printing device.
• the color supply devices 47, 48 shown there can also be used in the embodiment according to FIG. 1 as the color supply devices 15 to 18.
• the printing device 1 according to FIG. 2 has a total of six primary color reservoirs 49, 50, 51, 52, 53, 54.
• the four primary color reservoirs 49 to 52 arranged on the left in FIG. 2 contain the primary colors of the CMYK color model, that is to say cyan , Magenta, yellow and black.
• the primary color reservoirs 53, 54 contain additional colors, for example red and orange, which are particularly suitable for mixing difficult decorative colors or non-displayable CMYK decorative colors.
• an empty reserve reservoir 55 is still provided.
• the primary color reservoirs 49-54 cooperate with two primary color dispensers 56, 57, which are portions of the color providing devices 47, 48.
• Each basic ink metering device has six metering valves 58. Each of these metering valves 58 is arranged in a paint line 59 between one of the primary ink reservoirs 49 to 54 and one of two mixing chambers 60, 61.
• the mixing chambers 60, 61 are each part of one of the color supply devices 47, 48.
• the metering valves 58 are in signal connection with the control device 10 via a control line 62.
• the latter is in the embodiment of FIG. 2 in two sub-control devices 10a for controlling the metering valves 58 and 10b for controlling two field-inkjet printing devices 63, 64 divided. The latter are constructed according to the pressure devices 23 to 26.
• the pressure devices 63, 64 are in signal communication with the partial control device 10b via a control line 65.
• a printing method with the printing device 1 according to FIG. 1 with the use of color supply devices 15 to 18 in the manner of the color supply devices 47, 48 of the embodiment according to FIG. 2 operates as follows:
• the decorative template 6 is detected by the image capture device 4.
• the acquired image data for the decorative template 6 are separated into separations, which overlay and give the decoration 3 in accordance with the coloring.
• FIG. 2 two such true-color partial images 66, 67 are shown very schematically.
• the partial image 66 generated by the printing device 63 consists of a first zigzag pattern of successive squares, which are adjacent one another over the corner.
• the partial image 67 consists of a further zigzag sequence of squares of different color, which partially overlap with the squares of the partial image 66.
• the partial images 66, 67 represent schematic representations of partial images present in reality.
• the partial image 66 may, for example, consist of a dot pattern of a first color and the partial image 67 of a dot pattern of a second color.
• a stone decor can be produced on a substrate, for example an edge band or a window profile.
• a wood decor is possible, which can be generated with two partial images, one of the partial images creates a background color and the other partial image a wood grain.
• the decomposition of the decorative template 6 in partial images is done by a Dekormotiv- and color analysis, the basic sequence is known by public prior use.
• the color composition as well as the contouring of the individual partial images naturally depends on the number of pressure devices present in the printing device 1.
• the colors necessary and to be provided for printing the individual partial images are specified. This is done by calculating a corresponding color formulation in the computing device 8, which is then implemented by the control device 10 and the sub-controller 10a.
• the partial control device 10a controls the metering valves 58 of each mixing chamber, which is assigned to the printing devices 23 to 26, for producing the predetermined color for the respective printing device 23 to 26.
• the composition passed through the metering valves 58 is then mixed from the primary colors.
• the additional colors in the primary color reservoirs 53, 54 can serve to expand the displayable color space.
• the individual partial images with the colors provided in the mixing chambers are successively printed formless, for example by inkjet or inkjet printing, onto the substrate 2.
• “Successive” here refers to the spatial reordering of the printing devices 23 to 26 in succession and not necessarily to a chronological sequence of printing on a substrate section. The latter are driven by the substrate or the drive means and roll off on the substrate 2, transferring the printed partial images to the substrate 2. This produces the printed partial image on the substrate 2. On each section of the substrate 2, which contains all four printing devices 23 to 26, the entire decor is then formed by superimposing. Printing by the printing devices 23 to 26 is controlled by the control device 10. Between the individual partial image prints, the freshly printed partial images are dried by the dye-drying devices 41 to 44.
• the pressure may be continuous, intermittent or even batchwise, e.g. on profile lengths, done.
• the printed decoration can be detected by a monitoring device that is constructed like the image capture device 4.
• the monitoring device not shown, is in signal connection with the computing device 8.
• the control device 10 stops printing or calibrates the color provisioning and / or printhead parameterization in cooperation with the computing device 8.
• the printing apparatus 1 can also be used for providing the colors for preparing a rotary printing or other contact printing method independent of the inkjet printing method described.
• the calculated true colors for generating the partial images which can be generated by mixing, are then used in the rotary printing process.
• the ascertained control data for the color provision is transferred via the interface 46 to a corresponding control device of the rotary printing or contact printing device.
• the true colors calculated for generating the partial images are provided in the embodiment of FIG. 2 in the mixing chambers 60, 61, this provision being controlled by the partial control device 10a.
• the printing of the sub-images via the printing devices 63, 64 is controlled by the sub-controller 10b.
• the printing with the printing devices 63, 64 takes place directly on the substrate 2. Transfer bodies are dispensed with. Between the printing devices 63, 64 and after the printing device 64, according to the embodiment of FIG. 2, two color drying devices can be arranged, which are not shown.
• the printing apparatus 1 according to FIG. 2 may additionally comprise an image capturing device 4 and a monitoring device for detecting the printed decoration, as described above in connection with the embodiment according to FIG.
• Fig. 3 shows a further variant of a printing device 1.
• Components which correspond to those which have been explained above with reference to Figs. 1 and 2 bear the same reference numerals and will not be discussed again in detail.
• An advancement of the substrate 2 takes place in the printing apparatus 1 according to FIG. 3 from left to right.
• the printing device 1 produces a total of two partial images with two spatially separated partial image printing devices 68, 69.
• Each printing device 68, 69 has a total of six inkjet printing units 70, 71, 72, 73, 74, 75 in the manner of the printing devices 23 to 26 of the embodiment of FIG. 1.
• the printing units 70 to 75 work with primary colors.
• the printing units 70 to 75 via color lines 59 with the primary color reservoirs 49 to 54 in fluid communication.
• the inkjet printing units 70 to 75 are therefore base-color inkjet printing units as modules of the printing-form partial image printing device 68, 69.
• Each printing unit 70 to 75 is assigned a color transfer body 76 in the form of a transfer roller. Between adjacent printing units 70 to 75 and after the last printing device 75 of each partial image printing device 68, 69 a Farbtrocknungs- device 77 is assigned to the type of color drying devices 41 to 44.
• Each of the printing units 70 to 75 has a metering valve 78 assigned to the respective primary ink reservoir 49 to 54 in the manner of the metering valve 31 of the embodiment according to FIG. 1.
• FIG. 3 shows by way of example only the metering valve 78 of the printing unit 70 of the partial image printing device 68 shown.
• the ink supply takes place in the printing device 1 according to FIG. 3 by providing the primary colors 49 to 54 via the metering valves 78 of the printing units 70 to 75. These metering valves 78 are actuated by the control device 10.
• the motif formation and color mixing of the partial images is produced by superposing the primary colors printed by the printing units 70 to 75 on the substrate 2.
• the printing units 70 to 75 print the individual printing inks sequentially and separately onto the substrate 2.
• the freshly printed ink is dried with the aid of the dye driers 77, thereby preventing uncontrolled bleeding when the next base ink is applied. It arises with appropriate Grundlichmengendostechnik a true color separation printing form bound printing analog, visually uniform, color impression.
• the printing apparatus 1 according to FIG. 3 can also have an image capturing device 4 and a monitoring device of the type described above in connection with the embodiment according to FIG.
• FIGS. 2 and 3 can also be used to prepare an independent rotary printing process, as described above in connection with the embodiment according to FIG.
• the color provision is computer controlled in the embodiments of FIGS. 1 to 3.
• a rotary printing device or a rotary printing method is here discussed as representative of a known from the prior art contact printing method.
• Examples of contact printing methods in which the color supply control data obtained by the printing apparatus 1 can be used are gravure printing, rotary pad printing or flexographic printing.
• the color rendering techniques of the embodiments of Figures 2 and 3 can also be combined within a printing device.
• the printing devices 1 according to FIGS. 1 to 3 and conventional contact pressure components can be integrated.
• the transfer rollers 33 to 36 or 76 can be adapted in terms of their diameter to a repeat length of the decor 3 such that the transfer roller is always wetted in the same place on the peripheral wall with ink to be transferred when printing a partial image, so that no shadow images are transmitted.

Landscapes

• Ink Jet (AREA)
• Manufacturing Of Printed Wiring (AREA)
• Non-Metallic Protective Coatings For Printed Circuits (AREA)
• Printing Methods (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (6)

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Family Cites Families (12)

• 2006
  • 2006-05-16 DE DE102006023117A patent/DE102006023117A1/de not_active Withdrawn
• 2007
  • 2007-05-14 PL PL07725173T patent/PL2018272T3/pl unknown
  • 2007-05-14 DE DE502007002625T patent/DE502007002625D1/de active Active
  • 2007-05-14 AT AT07725173T patent/ATE454990T1/de active
  • 2007-05-14 WO PCT/EP2007/004253 patent/WO2007131754A1/fr not_active Ceased
  • 2007-05-14 EP EP07725173A patent/EP2018272B1/fr not_active Not-in-force
  • 2007-05-14 PT PT07725173T patent/PT2018272E/pt unknown

Non-Patent Citations (1)

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