EP3512707B1 - Procédé et dispositif d'application par jet d'encre sur des substrats plats - Google Patents

Procédé et dispositif d'application par jet d'encre sur des substrats plats Download PDF

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Publication number
EP3512707B1
EP3512707B1 EP17767805.9A EP17767805A EP3512707B1 EP 3512707 B1 EP3512707 B1 EP 3512707B1 EP 17767805 A EP17767805 A EP 17767805A EP 3512707 B1 EP3512707 B1 EP 3512707B1
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EP
European Patent Office
Prior art keywords
nozzles
inkjet nozzles
inkjet
feed direction
substrate
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.)
Active
Application number
EP17767805.9A
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German (de)
English (en)
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EP3512707A1 (fr
Inventor
Dirk Schlatterbeck
Walther Krull
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Actega Schmid Rhyner AG
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Actega Schmid Rhyner AG
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Publication of EP3512707A1 publication Critical patent/EP3512707A1/fr
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    • 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
    • B41J2/01—Ink jet
    • B41J2/205—Ink jet for printing a discrete number of tones
    • 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
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2139—Compensation for malfunctioning nozzles creating dot place or dot size errors
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
    • B41J19/142—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction with a reciprocating print head printing in both directions across the paper width
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
    • B41J19/142—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction with a reciprocating print head printing in both directions across the paper width
    • B41J19/145—Dot misalignment correction
    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
    • B41J19/142—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction with a reciprocating print head printing in both directions across the paper width
    • B41J19/147—Colour shift prevention
    • 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
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04593—Dot-size modulation by changing the size of the drop
    • 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
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • 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
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • 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
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/155—Arrangement thereof for line printing
    • 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
    • B41J2/01—Ink jet
    • B41J2/205—Ink jet for printing a discrete number of tones
    • B41J2/2052—Ink jet for printing a discrete number of tones by dot superpositioning, e.g. multipass doubling
    • 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
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
    • B41J2/2114—Ejecting specialized liquids, e.g. transparent or processing liquids
    • 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
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2121—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
    • 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
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2135—Alignment of dots
    • 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
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
    • 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
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/51—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements serial printer type
    • 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
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/515—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements line printer type
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B41J25/003—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for changing the angle between a print element array axis and the printing line, e.g. for dot density changes
    • 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
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
    • B05B13/041—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line

Definitions

  • the invention generally relates to the printing processing of substrates, in particular the printing or coating of flat substrates, such as printed matter, paper and cardboard, with color information and/or raised plastic layers.
  • print finishing processes have become established, in which printed products are provided with raised, haptically detectable coatings.
  • printed sheets for the production of paper or cardboard packaging are provided with such coatings in order to realize specific design ideas.
  • Various coating processes are known from the prior art for producing the raised or relief-like layers mentioned above.
  • a comparatively new process for this is coating using inkjet technology.
  • the production of the coatings with inkjet technology is in the WO 2003/099456 A1 and the WO 2009/012996 A1 described.
  • each halftone dot is generated individually.
  • the most common method is printing with inkjet printheads (inkjet printheads). The price is determined by the nozzles used.
  • the method is known of being able to print on any desired substrate width by moving the print heads in a direction perpendicular to the substrate movement.
  • the substrate is stopped for the head movement and the print head prints the substrate in strips. This operation is described with the English term "scanning mode".
  • Inkjet printheads have the property that the nozzles of the printhead can exhibit certain deviations in droplet ejection from the direction perpendicular to the nozzle plate over the service life. This trait can play a role from the very beginning of using the head, but usually increases over time. In addition, manufacturing tolerances in the manufacture of the heads can contribute to inaccuracies in drop positioning.
  • nozzles can fail temporarily or permanently during use.
  • a temporary failure of nozzles is usually counteracted by ejecting liquid from the reservoir through the nozzles (the term “purging” has become common for this) and removing the material that has escaped from the nozzle plate. This reconditioning of the nozzles interrupts the printing process and reduces the productivity of the printing unit.
  • the permanent failure of nozzles in a printhead can generally only be remedied by completely replacing the entire printhead.
  • the heads are arranged so that the rows of nozzles are arranged transversely, typically essentially perpendicularly, to the substrate movement.
  • the heads with the rows of nozzles can also be arranged at an angle deviating from the vertical direction in order to achieve a higher resolution.
  • this type of use means that a droplet path on the substrate originates from precisely defined nozzles parallel to the substrate movement.
  • nozzles can be arranged one behind the other in single-pass operation and these can then be used alternately or at random to generate the individual droplets in a droplet path. In this way, similar to the scanning mode with statistical selection of nozzles for individual droplet positions, the formation of stripes and the failure of nozzles can be concealed to some extent.
  • the invention provides a method for printing flat substrates according to claim 1.
  • directional components in mutually opposite directions, or antiparallel directional components are generally present in the paths. For example, this results in paths in the form of wavy lines or zigzag lines.
  • the movement of the nozzles can be periodic or even statistical.
  • the conveying device can be a web feed device in a roll-to-roll printing machine, in which a substrate web is fed to the print heads is moved past. Accordingly, in this device, a substrate in the form of a web-shaped printing pad or substrate web, in particular made of paper or cardboard, is printed, which is provided wound up to form a roll. The printing substrate is unrolled by means of the conveyor device, passed through the device and wound up again after printing.
  • the fluid application material can be a color or an ink-jet ink, so that a pattern in the form of a colored printed image is generated by the application.
  • the term “colored printed image” is generally to be understood as a pattern that contrasts with the background. Accordingly, black is also to be understood as a printing color in this sense, as is customary in the field of the printing industry.
  • a polymer coating is applied using the method.
  • a fluid organic polymer material is applied with the ink-jet nozzles and the film is cured to form a solid polymer coating after application.
  • This polymer layer can also be transparent and colorless
  • the inkjet nozzles can be moved individually or in groups. It is particularly easy to fix the inkjet nozzles in a common holder, which can also be referred to as a pressure bar, and then to pivot this holder transversely to the transport direction.
  • a common holder which can also be referred to as a pressure bar
  • the amplitude is not greater than 300 times the nozzle spacing, preferably not greater than 100 times the nozzle spacing, particularly preferably not greater than ten times the nozzle spacing, and according to the invention not greater than five times the nozzle spacing, measured from the center of a nozzle to the center of one neighboring nozzle.
  • a streak can occur at failure or Emission reduction of a single nozzle can be suppressed even if the amplitude is smaller or, according to the invention, equal to the simple nozzle spacing.
  • the invention provides a device for printing flat substrates according to claim 7 .
  • the device 1 also has a hardening device 23 in order to harden the fluid film 11 to form a solid polymer coating 12 after it has been applied.
  • a movement device for moving the inkjet nozzles 70 is provided in order to move the inkjet nozzles 70 in a direction transverse to the feed direction 4, preferably along the longitudinal direction, during the application of the pattern 14 and during the movement of the substrate 3
  • the paths can have the shape of wavy lines.
  • the conveyor device 5 comprises a conveyor belt on which the substrates 3 are placed.
  • the substrates 3 in the form of pre-printed printed sheets are taken from a magazine 27 and placed on the conveyor belt.
  • the nozzles 70 are connected to a reservoir in which the fluid coating material 9 is kept.
  • radiation-curable, in particular UV-curable, organic preparations are used as fluid organic coating materials.
  • reactive acrylates mixed with photoinitiators can be used for this purpose.
  • the curing device 23 has a UV radiation source accordingly.
  • a drive with an eccentric is shown as a movement device 25 only by way of example, by means of which the holder on which the inkjet nozzles 70 are attached is pivoted transversely, in particular perpendicularly, to the feed direction of the conveyor device 5 .
  • the substrates 3 are printed with a printed image 18 .
  • the individual elements of the printed image are delimited by a contour 19 .
  • such a substrate 3 printed with a printed image 18 is now provided with the polymer coating in such a way that the printed image 18 corresponds to the pattern 14 of the coating 12 .
  • the pattern 14 can in particular correspond to the printed image in such a way that the contours 15, 19 of the printed image 18 and pattern 14 are at least partially parallel, preferably run at least partially congruently as shown.
  • the printed image includes a printed corner and a printed star.
  • the polymer coating 12 then covers, for example, the printed areas as a raised coating and is delimited by contours 15 which are congruent with the contours 19 of the printed image 18 .
  • the coating takes place while leaving out the areas 16 of the surface 30 between the elements of the printing.
  • these areas can also be printed, but the areas covered with the polymer coating 12 are elements that stand out visually due to their contours 19 (this finishing technique is also referred to as “spot coating”).
  • a printing device 6 arranged upstream of the application device 7 is provided.
  • the printing device 6 can be controlled and operated by the control device 13 .
  • the printing device 6 can be a digital printing device, preferably an inkjet printing device. The printing device 6 first produces the printed image 18 on the substrates 3 in the form of printed sheets, to which the polymer coating 12 is then applied with the application device 7 while leaving out areas 16 corresponding to the printed image 18 .
  • the next nozzle at the time of firing for a drop position on the substrate 3 can be selected for firing according to a further development of the invention. In this way, even with a very small movement perpendicular to the substrate movement, the formation of stripes and also the visibility of nozzle failures can be drastically minimized, similar to what is described for the scanning mode.
  • the invention provides that the pattern 14 of the coating is defined by an arrangement of adjacent target areas 140, with a computer 19 determining which of the inkjet nozzles 70 is active during the movement of the substrate 3 on the one hand and the periodic movement of the inkjet nozzles 70, on the other hand, comes closest to a target area 140 or best corresponds to it and sends a control signal to this inkjet nozzle 70, so that the nozzle 70 points to the determined target area 140 as closely as possible, or best matching point 141 a drop 71 of the fluid coating material 9 emits.
  • At least one position sensor 21 is provided, which detects the position of the inkjet nozzles in a direction transverse to the feed direction, i.e. in the direction in which the inkjet nozzles 70 are moved backwards and forwards by means of the movement device 25 be moved here.
  • This embodiment is not necessarily connected to the embodiment explained above, in which the distance to a target area is determined.
  • Illustrated is an array of adjacent target areas 140 which together form one element of a pattern 14 of the polymeric coating.
  • the target areas are preferably stored in the control device 13 in the form of data, which control the nozzles like a print file, or which represent a printed image of the polymer coating to be applied.
  • the traces 72 of the ink jet nozzles 70 form a pattern of adjacent wavy lines as shown.
  • the target areas 140 here are in the form of boxes, the method of dispensing drops is explained by way of example.
  • the target area 140 is covered by two tracks 72, namely the top two tracks.
  • the upper of these two traces provides the closest match to the target area 140 at a point 141 since that point 141 is closest to the center of the target area.
  • the bead 71 associated with the target area is then dispensed to form part of the polymer film, which is still fluid prior to curing.
  • the method can also be used if an inkjet nozzle fails.
  • This case is in 4 shown.
  • the second uppermost inkjet nozzle 70 has failed.
  • the pendulum movement of the nozzles means that target areas 140, for which the path of the failed nozzle normally provides the best match, are also either crossed by paths of other nozzles or are at least closely approximated.
  • the method described above is now carried out exactly as described for the present case, but without taking into account the trace of the no longer functional nozzle.
  • One of the target areas 140 is hatched for clarity. It can be seen that the best match would be obtained here with the missing trace.
  • the best approximation is now using the in 4 reaches the track shown below the gap in the tracks, this track even also crossing over the target area 140 in the example shown.
  • the associated inkjet nozzle is controlled by calculating its position and the distance or correspondence of this position to the target area in such a way that a drop is preferably delivered as close as possible to the center of the target area 140 .
  • the method is advantageous because the nozzle dropout appears as a statistical lack of halftone dots and is not readily recognizable as such. Without the movement described, the nozzle failure would be clearly visible as a line.
  • the position of the nozzles or the print head during droplet ejection is known with an accuracy of ⁇ 1 ⁇ m. This level of accuracy cannot be achieved by positioning using a positioning device (hysteresis).
  • position measurement for example using linear encoders with appropriate read heads, in that the control device determines and activates the best inkjet nozzle for dispensing drops on a specific target area 140 based on the position measurement.
  • Other options for position detection or precise positioning are also conceivable.
  • an inaccuracy due to temperature expansion in particular when the fluid and nozzle heads are heated to adjust the viscosity, can be counteracted by positioning a read head at the first and last nozzle of a print head, or more generally by determining their position by means of at least one position sensor 21.
  • the position can be detected by means of a feedback loop.
  • a further embodiment of the invention which is suitable for avoiding stripes in the coating pattern as an alternative or in addition to the pendulum movement of the nozzles described above, is described below.
  • This embodiment is based on the use of a plurality of rows of inkjet nozzles which are arranged in a staggered manner along the feed direction.
  • the layer thickness can be influenced by several parameters when applied with inkjet nozzles.
  • the droplet size should be mentioned here. The larger the droplets with the same grid width, the greater the layer thickness that can be achieved.
  • the inkjet nozzles are controlled by means of a control device in such a way that they emit drops of different sizes, so that the applied amount of fluid is adjusted following a default.
  • the specification can be stored in a print file, by means of which the control device 13 controls the inkjet nozzles 70 .
  • the native drop and size scaling by multiple drop ejection in which the individual droplets combine to form a larger drop in flight.
  • the native droplet size can usually only be set within a narrow range for each print head.
  • An extension of the possibilities for controlling commercially available inkjet print heads, which are controlled by piezo actuators, is described, for example, in WO2017/009705 A1 described. According to this method, the native droplet size can be varied within significantly wider limits.
  • a print head can only be set within a certain frequency range (droplets per unit of time).
  • the latter property depends on the construction and the type of drop generation.
  • the generation of larger droplets by combining individual droplets according to the method described is therefore at the expense of the possible droplet frequency, since the frequency limitation applies to the individual droplets.
  • the WO2017/009705 A1 Due to the significantly shorter pulses at the same frequency, it is possible to multiply the droplets in one pulse.
  • the grid width can be varied.
  • the screen ruling in a single-pass machine is defined by the nozzle pitch. No changes can be made here during operation with a fixed geometry.
  • the droplets In the direction of the substrate movement, the droplets can be positioned more closely to achieve greater layer thicknesses (reduction of the screen width in the running direction of the substrate). If only one row of nozzles is used, the application thickness that can be achieved depends on the speed due to the limitation of the droplet ejection frequency.
  • the achievable minimum line width is also limited because the slowing down of the substrate movement simultaneously results in a longer flow time for the applied layer and the pressure on the edges of the relief structures increases with a higher layer thickness.
  • the several rows of inkjet nozzles 70 are staggered along the feed direction 4, or are arranged offset in such a way that target areas the substrate, the extent of which is defined by the area covered by the impinging droplets, are swept over by a plurality of inkjet nozzles 70 .
  • one inkjet nozzle per row of nozzles can sweep over the respective target area.
  • figure 5 shows an example with two rows of nozzles 73, which are arranged staggered one behind the other in the feed direction 4. The nozzles have the same positions in the direction perpendicular to the feed direction 4 so that they each cover the same target areas on the substrate 3 .
  • a movement device 25 can be provided.
  • the inkjet nozzles of different rows are shifted relative to each other.
  • the print image can be divided up differently according to statistics or a rule. From simply alternating between rows of nozzles, through a checkerboard pattern, to random or quasi-random patterns.
  • the target areas are coated along a path swept by a nozzle by several alternating nozzles arranged one behind the other from the different nozzle rows.
  • the film 11 is cured to form a solid polymeric coating 12 after application.
  • the 6 and 7 12 show two examples of coating patterns 14 for clarification.
  • the coating patterns 14 are divided into an arrangement of target areas 140 corresponding to a pixel representation. These are lined up one behind the other along the transport direction 4. If there is no pendulum movement of the inkjet nozzles 70, then the paths 72 of the nozzles are collinear with the transport direction.
  • the target areas 140 coated by the inkjet nozzles of a specific nozzle row 73 are each shown with the same hatching. At the in 6 example shown alternate progressively in a row along the transport direction 4 from three different hatchings. Thus, three nozzles, each from a different row of nozzles, are operated sequentially.
  • an alternating, sequential operation of two rows of nozzles follows a checkerboard pattern.
  • two inkjet nozzles 70 of one of the rows of nozzles are operated together, the two adjacent inkjet nozzles of the row of nozzles are suspended.
  • This pattern alternates after two successive target areas along the transport direction 4, so that the inkjet nozzles 70 that were previously not activated are now operated.
  • An arrangement for position determination as the example of 1 according to a further aspect, can also be used for self-adjustment of the print heads.
  • the general idea is that when at least one position determination per print head is used, a plurality of print heads can be roughly arranged in relation to one another and a calibration is carried out with knowledge of the position data.
  • the inkjet nozzles 70 are integrated in print heads 75 in the usual way. These print heads 75 are fixed next to one another transversely to the feed direction 7 of the device 1 on a holder 32 . Due to tolerances, the actual position can deviate slightly from the intended position. A position shift transverse to the feed direction 4 is particularly critical here, since this in turn can lead to the formation of visible stripes in the polymer coating.
  • the representation is purely schematic.
  • the print heads 75 can be arranged in two rows one behind the other, in a different way than shown, in order to keep the nozzle spacing between the nozzles of two heads transverse to the feed direction exactly the same as the spacing between adjacent nozzles within a print head. Similarly, an arrangement of the rows of nozzles in a herringbone pattern is also possible.
  • the print heads 75 are now each assigned position sensors 21 which precisely determine the position of the print head.
  • position markings 77 can be provided for position determination.
  • the print head shown on the far right is attached slightly laterally shifted, so that the directional arrow drawn from Position sensor 21 to mark 77 runs slightly obliquely.
  • the interaction of these heads for a print image is now achieved through the combination of knowledge of the position and by measuring a specific print image.
  • a print image generated with the print heads 77 is recorded, in particular scanned, deviations from the target image are determined, position changes for the print heads 77 are determined from the deviations and the positions of the print heads are changed by means of an adjusting device 78 until the position sensors 21 measured positions match the determined changes in position.
  • the print heads 77 of a printing unit are equipped with a position detector, the arrangement can be made roughly as described above and the mutual alignment can be put into operation very quickly by using the exact position and calculating the interaction for a consistent printed image.
  • the nozzle positions determined from a test print are used as a basis for assigning each nozzle to a specific position for the print. In the case of overlaps, either a redundant nozzle is not used or a pattern is assigned according to which the redundant nozzles are used alternately.
  • the print heads 75 In order to avoid gaps between the individual print heads and thus larger distances between the outer nozzles of adjacent print heads, it is generally favorable to arrange the print heads 75 in several rows, with the print heads 75 overlapping transversely to the feed direction 4 . As a result, the outer inkjet nozzles 70 of adjacent print heads 75 are spaced apart in the direction along the feed direction 4, but can be positioned arbitrarily with respect to one another, seen in the feed direction 4, in particular with a uniform spacing. 9 shows such an arrangement with two rows of print heads 75 staggered one behind the other in the feed direction 4.
  • the print heads 77 are equipped with an actuating device along a direction transverse to the transport direction 4 with position detection, a power supply, preferably a fluid supply (e.g. a hose connection with hydrostatic fluid pressure or a separate pump with a connection to a reservoir) and a network connection to the Connection to the control device 13 are provided.
  • a power supply preferably a fluid supply (e.g. a hose connection with hydrostatic fluid pressure or a separate pump with a connection to a reservoir) and a network connection to the Connection to the control device 13 are provided.
  • a fluid supply e.g. a hose connection with hydrostatic fluid pressure or a separate pump with a connection to a reservoir
  • the device 1 has a curing device 23 in order to cure the fluid film 11 into a solid polymer coating 12 after application.
  • the adjustment of the print head position does not have to be done by means of a printed image.
  • the embodiment described above can initially be used to set the arrangement of the print heads 77 relative to one another as precisely as possible, even if there are inaccuracies during assembly. The inaccuracies are caused by the adjusting devices compensated based on the measured position data. This adjustment can be made by the control device 13, but optionally also by a computing device in the print head 77.
  • the positional data need not necessarily reflect positions relative to a fixture. According to a development of the invention, it is provided that the position sensors 21 are set up to determine positions relative to other print heads. In this way, an exact alignment of the print heads 77 with one another can be achieved by adjustment.
  • the inkjet nozzles can also be actuated taking into account the measured position. Print data or control signals for the inkjet nozzles 70 can then be corrected even if the position of the print head does not exactly match the intended position.
  • 10 shows a schematic of a test image 35 on a substrate 3, on the basis of which the control signals of the nozzles are corrected or adjusted in order to obtain a printed image that is as uniform as possible.
  • the test image 35 can be used as in 10 shown are formed from lines 37 printed by individual nozzles.
  • the target positions 38 of the lines 37 are in 10 shown as dashed lines.
  • the lines of adjacent nozzles can be applied offset to one another along the feed direction, as shown.
  • the print image produced can be recorded, for example, by scanning or photographing the test image 35 . Then deviations from the target image are determined. Changes in position for the print heads can then be determined from the deviations and the positions of the print heads can be changed by means of an adjusting device 78 until the positions measured by position sensors 21 match the determined changes in position.
  • given the positions of Printheads can also select nozzles based on proximity to target position. For example, if two nozzles are in the same position, either a nozzle can be selected or a pattern for alternating nozzles can be specified as described in the text. The triggering times of the nozzles can also be adjusted so that the droplets are emitted by the nozzles as close as possible to the respective desired position 38 .
  • the invention can generally be implemented in a particularly advantageous manner with a modular structure.
  • printing modules 81 are connected to form an application device 7 .
  • the application device 7 contains all of the print heads of a printing device 1 according to the invention.
  • the pressure modules 81 can be fastened next to one another on a traverse or axle 82, in particular by means of suitable axle attachments 83.
  • the modules 81 according to the example of FIG 9 arranged in two rows.
  • the printing modules 81 are mounted on two axes 82 positioned one behind the other in the feed direction 4 .
  • the print modules 81 each include at least one print head 75.
  • each module can be equipped with a position sensor 21.
  • the position sensor can measure a relative displacement, for example by the sensor measuring the distance to the adjacent printing module 81 .
  • an encoder ruler can be present as a position marker, which extends along the axis 82 .
  • a print module 81 can include control electronics 84, which control the print head 75, and possibly others Tasks such as communication with a higher-level control device 13 and/or position correction calculations can be carried out.
  • a print module 81 has an electronic interface 85 at least for the transmission of the print data.
  • the energy supply can also be provided via the interface.
  • connections for supplying the tank with the fluid to be applied possibly also a connection for supplying the tank with a regulated negative pressure, can be provided.
  • the pressure modules 81 are connected to one another with connecting lines.
  • the connecting lines are each drawn between the interfaces 85 of adjacent modules 81 . It is also possible to connect the print modules to a common bus.
  • the pressure modules 81 can be roughly aligned with one another on the axis 82 .
  • the positions of the print heads 75 relative to one another can be determined and the structure of the print image can be defined on the basis of the determined positions.
  • the nozzle rows of the print heads should preferably fit together at least without a gap, but ideally a certain overlap is set and the redundant nozzles are operated selectively using a control pattern.
  • the advantage of this type of calibration is that the mechanical alignment of the heads to each other, as explained above, does not have to be in the range of the usual tolerances.
  • the alignment of the print image can be controlled by the position sensors 21 to match the head movement to avoid streaks. Also can Unfavorable head positions (e.g. with 1.5 times the nozzle spacing) can be corrected in a targeted manner. The latter can also be done electronically.
  • adjusting devices 78 can be integrated in the print modules 81, which can move the print head 75 relative to the print module and transversely to the feed direction.
  • the modular design of the application device 7 described above is particularly advantageous in order to be able to easily expand a printing device.
  • a corresponding number of print modules can be mounted on one or more axes and connected to one another.
  • the lateral adjustment of the print heads then takes place, for example, with the aid of a test image and/or also by evaluating the data from the position sensors.
  • the reciprocating movement of the print heads is also implemented in the modular design of the device described above. It is precisely in this way that mechanical inaccuracies when mounting the modules on the axis can be compensated.
  • an adjusting device 78 can be provided on the axle or axles 82 .
  • the modules 81 each have such adjusting devices 78 . This simplifies the mechanics of the application device.
  • an adjusting device 78 integrated in the module 81 enables different movements of the print heads 75 of the modules 81 to be carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Ink Jet (AREA)
  • Coating Apparatus (AREA)

Claims (12)

  1. Procédé d'impression de substrats plats, pour lequel
    - un substrat (3) est déplacé devant un dispositif d'application (7) le long d'un sens d'avance (4) au moyen d'un dispositif de transport (5) et
    - le dispositif d'application (7) applique pendant le déplacement du substrat par plusieurs buses (70) à jet d'encre agencées dans une rangée transversalement au sens d'avance par gouttes en réponse à des signaux de commutation commandés par ordinateur un matériau (9) d'application fluide sur la surface (30) du substrat (3) dans un motif (14) avec un contour (15) prédéterminé, en particulier en réservant des zones (16), dans lequel
    - pendant l'application du motif (14) et pendant le déplacement du substrat (3) les buses (70) à jet d'encre sont déplacées alternativement en direction transversale au sens d'avance (4), de préférence le long du sens longitudinal de l'agencement en rangée des buses (70) à jet d'encre de sorte que les trajets (72) que parcourent les buses (70) au-dessus du substrat par le chevauchement du déplacement alternatif avec le déplacement le long du sens d'avance (4), présentent des composantes directionnelles perpendiculairement au sens d'avance (4), dans lequel un matériau de revêtement organique fluide est appliqué comme matériau d'application fluide et le film (11) est durci après l'application en un revêtement (12) polymère solide et une amplitude du déplacement des buses (70) à jet d'encre transversalement au sens d'avance (4) n'est pas supérieure à cinq fois la distance entre des buses et est au moins identique à la simple distance entre des buses, mesurée du milieu d'une buse (70) à jet d'encre au milieu d'une buse (70) à jet d'encre contiguë, et
    dans lequel le motif (14) du revêtement est défini par un agencement de zones cibles (140) se trouvant les unes à côté des autres, dans lequel un ordinateur (19) détermine laquelle des buses (70) à jet d'encre pendant le déplacement du substrat (3) d'une part et le déplacement périodique des buses (70) à jet d'encre d'autre part se rapproche le plus possible d'une zone cible (140) ou coïncide au mieux avec celle-ci et envoie un signal de commande à cette buse (70) à jet d'encre de sorte que la buse (70) émette sur le point (141) déterminé s'approchant de la zone cible (140) ou coïncidant au mieux une goutte (71) du matériau (9) de revêtement organique fluide.
  2. Procédé selon la revendication précédente, dans lequel la position des buses (70) à jet d'encre dans le sens, dans lequel les buses (70) à jet d'encre sont déplacées alternativement au moyen du dispositif de déplacement (25), est mesurée par au moins un capteur de position (21).
  3. Procédé selon la revendication 1, caractérisé en ce qu'un substrat (3) pourvu d'une image d'impression (18) est pourvu du revêtement polymère de telle manière que l'image d'impression (18) corresponde au motif (14) du revêtement (12), en particulier que les contours (15, 19) de l'image d'impression (18) et du motif (14) s'étendent au moins partiellement parallèlement, de préférence de manière coïncidente.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'au moyen d'un dispositif de commande les buses à jet d'encre sont commandées de sorte que celles-ci émettent des gouttes (71) de différente grandeur de sorte que l'épaisseur de couche soit adaptée suivant une consigne, en particulier dans lequel la consigne est enregistrée dans un fichier d'impression, au moyen de laquelle le dispositif de commande (13) commande les buses (70) à jet d'encre.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que des zones cibles agencées les unes derrière les autres successivement le long du sens d'avance (4) sont imprimées alternativement par plusieurs buses (70) à jet d'encre agencées les unes derrière les autres dans le sens d'avance.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que les buses (70) à jet d'encre sont intégrées dans plusieurs têtes d'impression (77), dans lequel aux têtes d'impressions (77) est associé respectivement un capteur de position (21), et dans lequel
    - une image d'impression générée avec les têtes d'impression (77) est détectée, en particulier scannée,
    - des divergences à l'image de consigne sont déterminées,
    - à partir des divergences des modifications de position pour les têtes d'impression (77) sont déterminées et
    - les positions des têtes d'impression sont modifiées au moyen d'un dispositif de réglage (78) jusqu'à ce que les positions mesurées au moyen des capteurs de position (21) coïncident avec les modifications de position déterminées.
  7. Dispositif (1) pour l'impression de substrats plats, avec
    - un dispositif d'application (7),
    - un dispositif de commande (13) et
    - un dispositif de transport (5) afin de déplacer un substrat (3) le long d'un sens d'avance (4) devant le dispositif d'application (7), dans lequel
    - le dispositif d'application (7) comporte plusieurs buses (70) à jet d'encre agencées dans une rangée transversalement au sens d'avance, et
    - le dispositif de commande (13) est conçu pour la génération de signaux de commutation commandés par ordinateur, au moyen desquels les buses (70) à jet d'encre émettent par gouttes un matériau (9) d'application fluide, dans lequel
    - le dispositif de commande (13) est en outre conçu afin de commander les buses à jet d'encre de telle manière que sur la surface (30) d'un substrat (3) déplacé devant un film (11) fluide du matériau d'application soit appliqué sous la forme d'un motif (14) avec un contour (15) prédéterminé, en particulier en réservant des zones (16), dans lequel
    - un dispositif de déplacement (25) pour le déplacement des buses (70) à jet d'encre est prévu afin de déplacer alternativement pendant l'application du motif (14) et pendant le déplacement du substrat (3) les buses (70) à jet d'encre en direction transversale au sens d'avance (4), de préférence le long du sens longitudinal de l'agencement de rangée des buses (70) à jet d'encre de sorte que les trajets que parcourent les buses (70) au-dessus du substrat (3) par le chevauchement du déplacement alternatif périodique avec le déplacement le long du sens d'avance (4), présentent des composantes directionnelles perpendiculairement au sens d'avance (4), dans lequel
    une amplitude du déplacement des buses (70) à jet d'encre transversalement au sens d'avance (4) n'est pas supérieure à cinq fois la distance entre des buses et est au moins identique à la simple distance entre des buses, mesurée du milieu d'une buse (70) à jet d'encre au milieu d'une buse (70) à jet d'encre contiguë ; et
    comprenant un dispositif de durcissement (23) afin de durcir le film (11) fluide après l'application en un revêtement (12) polymère solide, et dans lequel le dispositif est conçu de sorte que le motif (14) du revêtement soit défini par un agencement de zones cibles (140) situées les unes à côté des autres, dans lequel un ordinateur (19) détermine laquelle des buses (70) à jet d'encre pendant le déplacement du substrat (3) d'une part et le déplacement périodique des buses (70) à jet d'encre d'autre part s'approche le plus possible d'une zone cible (140) ou coïncide le mieux avec celle-ci et envoie un signal de commande à cette buse (70) à jet d'encre de sorte que la buse (70) émette sur le point (141) déterminé, s'approchant le plus possible de la zone cible (140) ou coïncidant le mieux une goutte (71) du matériau (9) de revêtement organique fluide.
  8. Dispositif selon la revendication précédente, caractérisé par au moins un capteur de position (21) qui mesure la position des buses (70) à jet d'encre dans la direction, dans laquelle les buses (70) à jet d'encre sont déplacées alternativement au moyen du dispositif de déplacement (25).
  9. Dispositif selon l'une des revendications précédentes, caractérisé par plusieurs rangées de buses (70) à jet d'encre qui sont agencées de manière échelonnée le long du sens d'avance (4).
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (13) est conçu afin de commander les buses (70) à jet d'encre de sorte que celles-ci émettent des gouttes (71) de différente grandeur de sorte que la quantité de fluide appliquée soit adaptée suivant une consigne, en particulier en ce que le dispositif de commande est conçu afin de commander au moyen d'un fichier d'impression, dans lequel la consigne est enregistrée, les buses (70) à jet d'encre.
  11. Dispositif selon l'une des revendications précédentes, caractérisé par plusieurs têtes d'impression qui présentent respectivement plusieurs buses (70) à jet d'encre, dans lequel les têtes d'impression (77) respectivement sont formées comme unité avec un capteur de position (21), un dispositif d'alimentation en fluide pour l'alimentation des buses (70) à jet d'encre en le matériau (9) d'application fluide, un dispositif de réglage (78) réglable de manière commandée par ordinateur, en particulier au moyen du dispositif de commande (13) pour le réglage de la position de la tête d'impression transversalement au sens d'avance, ainsi qu'un raccord, de préférence un raccord de réseau pour la liaison avec le dispositif de commande (13).
  12. Dispositif (1) selon l'une des revendications précédentes, dans lequel le dispositif d'application (7) présente plusieurs modules d'impression (81) fixés de manière amovible en déport en direction transversale au sens d'avance (4) sur au moins un axe (82) avec respectivement au moins une tête d'impression (75), dans lequel les modules d'impression (81) présentent respectivement un réservoir, une électronique de commande (84) et une interface (85), dans lequel les modules d'impression (81) peuvent être couplés les uns aux autres au moyen de leurs interfaces (85) pour l'échange de données, dans lequel de préférence le dispositif pour un élargissement de la largeur d'impression est conçu, en ce qu'un ou plusieurs modules d'impression (81) sont fixés à l'axe (82) et sont reliés par le biais de leur interface (85) au dispositif de commande (13).
EP17767805.9A 2016-09-13 2017-09-12 Procédé et dispositif d'application par jet d'encre sur des substrats plats Active EP3512707B1 (fr)

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DE102016117211.1A DE102016117211A1 (de) 2016-09-13 2016-09-13 Verfahren und Vorrichtung zum Ink-Jet-Auftrag auf flächigen Substraten
PCT/EP2017/072823 WO2018050617A1 (fr) 2016-09-13 2017-09-12 Procédé et dispositif d'application par jet d'encre sur des substrats plats

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US20190224968A1 (en) 2019-07-25
WO2018050617A1 (fr) 2018-03-22
DE102016117211A1 (de) 2018-03-15
CN109963721A (zh) 2019-07-02
US11148436B2 (en) 2021-10-19
CN109963721B (zh) 2021-09-07
EP3512707A1 (fr) 2019-07-24

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