EP3365176B1 - Procédé d'impression directe et machine de traitement de récipient permettant l'impression d'une pluralité de récipients de structure similaire - Google Patents

Procédé d'impression directe et machine de traitement de récipient permettant l'impression d'une pluralité de récipients de structure similaire Download PDF

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Publication number
EP3365176B1
EP3365176B1 EP16757606.5A EP16757606A EP3365176B1 EP 3365176 B1 EP3365176 B1 EP 3365176B1 EP 16757606 A EP16757606 A EP 16757606A EP 3365176 B1 EP3365176 B1 EP 3365176B1
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EP
European Patent Office
Prior art keywords
printing
direct
print
nozzles
nozzle
Prior art date
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Active
Application number
EP16757606.5A
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German (de)
English (en)
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EP3365176A1 (fr
Inventor
Florian Lauterbach
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Krones AG
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Krones AG
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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
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • 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
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles

Definitions

  • the invention relates to a direct printing method and a container treatment machine with the features of the preamble of claims 1 and 9, respectively.
  • direct printing processes and container handling machines with a direct print head are now increasingly used for labeling containers.
  • a direct print head can work, for example, according to the inkjet printing process, with individual drops of ink being applied to a container by means of a multiplicity of print nozzles.
  • the pressure nozzles are usually arranged in one or more parallel rows of nozzles and can be controlled individually.
  • For flat printing of the containers they are rotated with container mounts, for example, with respect to the direct print head, so that a flat print image is created in a printing ink.
  • a plurality of direct print heads are also arranged along a transport path or around a rotatable container receptacle, which apply the print images in one printing color to the circumference of the container. These then combine to form a multi-colored direct print.
  • UV-curing printing inks are usually used, which are cured on the containers by means of a UV light source. In some cases, however, scattered light can also cause printing ink to harden in the printing nozzles and nozzle failures over time.
  • the printing nozzles are cleaned in regular cycles in order to remove already dried-on printing ink and / or dirt.
  • the so-called “spitting” is carried out, in which all print nozzles of the direct print head simultaneously release printing ink under high pressure due to an increased fire voltage.
  • "purgen” a meniscus negative pressure is reduced (for example by -15 mbar) so that more or less printing ink runs out of the nozzles.
  • the impurities are flushed out of the nozzles.
  • the nozzles can also be wiped off manually with special cloths or automatically with a cleaning device.
  • the US 2005/0052483 A1 discloses an inkjet printing system and method.
  • the US 2014/0028771 A1 discloses an inkjet printing apparatus and method for seamlessly printing cans within a printing apparatus.
  • the US 2003/0081024 A1 discloses a printing system in which the print image data is shifted by at least one nozzle with respect to the print nozzles after a predetermined period.
  • the object of the present invention is therefore to provide a direct printing method or a container treatment machine for printing containers in which the printing nozzles become less clogged without the ongoing production having to be interrupted.
  • the invention provides a direct printing method for printing a large number of containers of the same type having the features of claim 1.
  • Advantageous embodiments of the invention are specified in the subclaims.
  • a different nozzle group is activated in each case for printing different subgroups of the containers with one and the same print image in a printing ink
  • the printing nozzles are stressed more evenly and there is a more regular one Ink flow instead.
  • a slight shift in the print image due to a corresponding selection of the print nozzles in the nozzle row is not perceived by the consumer.
  • the print image can be shifted along the row of nozzles or, when the resolution is reduced, various nozzle groups of an alternating raster can be activated, the print image only changing by a few Micrometer shifts. This is imperceptible to the consumer and the otherwise inactive pressure nozzles are regularly activated and rinsed. Regular flushing prevents nozzle failure.
  • the direct printing process can be carried out with a container treatment machine for printing containers in a beverage processing plant.
  • the container treatment machine can be arranged downstream of a filling system for filling a product into the containers and / or a closer.
  • the container treatment machine can, however, also be connected upstream of the filling process and / or be connected directly downstream of a container manufacturing process.
  • the direct printing method can be carried out in a control device of the container treatment machine, which controls at least one direct print head with the at least one row of nozzles.
  • the containers can be provided to hold beverages, hygiene articles, pastes, chemical, biological and / or pharmaceutical products.
  • the containers can be provided for any flowable or fillable media.
  • the containers can be made of plastic, glass or metal, but hybrid containers with material mixtures are also conceivable.
  • the containers can be bottles, cans and / or tubes.
  • the containers can be shaped containers with at least one surface deviating from the rotational symmetry about the longitudinal axis of the container.
  • the shaped containers can comprise at least one relief-like surface area.
  • the container can be rotated about its longitudinal axis by means of a container receptacle, preferably in order to generate a two-dimensional print image via the rotary movement.
  • the containers can be fed to individual printing stations by means of a transport device, the printing station each comprising one or more direct print heads. It is conceivable here that the transport of the containers stops during a printing process or is continued continuously.
  • the direct print head can work with a digital or inkjet printing process in which the printing ink is delivered to the container by means of the printing nozzles.
  • “Inkjet printing process” can mean here that a sudden increase in pressure is generated in chambers of a pressure nozzle by means of piezo or thermocouples, so that a small amount of printing ink is pressed through the pressure nozzles and dispensed as pressure drops onto the container.
  • Each pressure nozzle can be designed to generate a pressure point on the container.
  • the direct print head can comprise a nozzle plate which has at least one row of nozzles with the print nozzles.
  • a row of nozzles can have a number of pressure nozzles in a range from 100 - 10000, in particular in a range of 500-1024.
  • the nozzle plate has several rows of nozzles arranged parallel to one another (for example 1-8), which are arranged parallel to the container axis in particular due to the arrangement of the direct print head on the container treatment machine.
  • the pressure nozzles can be arranged in several parallel rows of nozzles which have an offset in the longitudinal direction that corresponds in particular to a fraction of a distance between two adjacent pressure nozzles of a single row of nozzles, in particular half, 1/3 or 1/4 of the distance.
  • the resolution of the print image can be increased without the printing nozzles having to be integrated in a single row in a small space.
  • the direct printing process can be carried out in parallel for several direct print heads of the same type or similar modules with several direct print heads, the corresponding nozzle groups being activated in each case.
  • the corresponding nozzle groups being activated in each case.
  • a nozzle group here can mean a selection of the pressure nozzles from the at least one row of nozzles.
  • Each nozzle group has an offset to the end of the nozzle row, the respective nozzle group being activated by changing the offset.
  • a region of pressure nozzles can be activated from the offset which forms the nozzle group.
  • the area of the activated print nozzles can correspond to the print height of the print image. Due to the offset that is changed in this way, the area of the active print nozzles is shifted along the nozzle row. This activates the pressure nozzles at the edge of the row of nozzles regularly.
  • the offset is changed cyclically or statistically.
  • Cyclic can mean here that the offset for the various subgroups of the containers runs through a period of values within a cycle.
  • the period of values can correspond, for example, to a sawtooth, triangular or sinusoidal curve.
  • Statistical can mean here that the offset is selected randomly in a range of values.
  • the row of nozzles can be moved between the printing processes by an actuator with an offset opposite to the respective offset in order to compensate for a shift of the print image on the containers caused by the offset.
  • the area of the activated pressure nozzles for all nozzle groups can thus remain at a constant height relative to the containers, while the area shifts along the row of nozzles.
  • all print nozzles can be activated despite a constant print image, see above that even the pressure nozzles at the ends of the row of nozzles do not dry out.
  • the printed image on the container does not shift despite the offset.
  • the offset and the offset can have the same amount.
  • the pressure nozzles of two of the nozzle groups can be arranged alternately in the at least one row of nozzles.
  • the resolution of the print image can be reduced compared to the distance between the print nozzles in the nozzle row, since, for example, only every second print nozzle is activated during printing. Due to the reduced print resolution, printing ink and thus costs can be saved. Due to the fact that the nozzle groups are arranged alternately and are preferably activated alternately when a container subgroup is printed, all printing nozzles are nevertheless used and are regularly flushed by the flow of ink. The offset of the print image of the two subgroups then corresponds to the distance between two adjacent print nozzles, i.e. a few micrometers. It is also conceivable that three or more nozzle groups are arranged alternately in the at least one row of nozzles in order to further reduce the resolution of the print image and still activate all print nozzles regularly.
  • the ink quantity of each print nozzle for a printing process can be determined from the print image and the nozzle groups can be determined therefrom in such a way that all print nozzles of the at least one nozzle row are activated cyclically or statistically. This activates the print nozzles, taking into account the amount of ink actually dispensed, so that there is a certain amount of ink flow through each print nozzle. This ensures that even those print nozzles that would otherwise emit a small amount of ink due to the print image do not clog.
  • the amount of ink required for a printing process can be determined for each printing nozzle by integrating an assigned image line or column.
  • the assigned image line or column can be the area of the print image that is printed by this pressure nozzle.
  • the print image can here, for example, be a file that contains a template of the print image, for example as a matrix of gray values.
  • the respectively activated nozzle groups can be determined in such a way that for all printing nozzles the amount of ink averaged over several printing processes exceeds a threshold value which in particular excludes a blockage of a printing nozzle.
  • the threshold value can be determined, for example, by laboratory experiments in which the pressure nozzles are operated over a predetermined number of printing processes with a gradually decreasing amount of ink and the failure of the pressure nozzles is determined by means of a test print or the like.
  • specific boundary conditions can also be taken into account, in particular environmental conditions (such as dust exposure) and / or UV scattered light with regard to dose in a predetermined time interval.
  • the predetermined number of printing operations may correspond to a specified number of printing operations of the printing nozzles with no cleaning operation. If the nozzle fails, the amount of ink used in this step can then be used as a basis for the threshold value.
  • the respectively activated nozzle groups can be determined in such a way that the amount of ink averaged over several printing processes is uniform for all printing nozzles.
  • the amount of ink for all printing nozzles can be integrated or averaged over the printing processes of the various subgroups of the containers and, based on this, the assignment of the printing nozzles to the respective nozzle groups can be adjusted so that the amount of ink of each printing nozzle is essentially the same.
  • Essentially the same can mean here that the ink quantity of each printing nozzle deviates as little as possible from a mean value over all printing processes.
  • the minimum deviation can be optimized in an optimization loop, for example.
  • the at least one row of nozzles for the one printing ink can be arranged in a single direct print head. Likewise, several rows of nozzles for the one printing color can be arranged distributed over several direct print heads.
  • the direct print heads can be arranged in such a way that print areas of the rows of nozzles at least partially overlap. This allows the print height to be increased regardless of the configuration of the direct print heads.
  • the nozzle groups can each include printing nozzles across several rows of nozzles and direct print heads. In particular, it is conceivable here that print nozzles of the two direct print heads are activated alternately in an overlapping area of the print image that can be printed on by both direct print heads, that is, during what is known as stitching. The alternately activated print nozzles for printing the overlap area are assigned to different groups of nozzles.
  • the invention with claim 9 provides a container treatment machine for printing containers, with at least one direct print head on which several printing nozzles for a printing ink are arranged in at least one row of nozzles and which are used to print the containers in one printing process with a print image in one Printing ink is formed, characterized in that the container treatment machine comprises a control device for the direct print head for performing the method according to any one of claims 1-8.
  • the print nozzles of the direct print head are activated again and again regardless of the resolution or height of the print image, since a different group of nozzles is activated for different container subgroups.
  • printing ink is repeatedly released from the printing nozzles and partially hardened ink residues are also flushed out.
  • the control device can be a machine control with which the entire container treatment machine, a part of it or only the direct print head is controlled.
  • the control device can comprise a microprocessor, a memory, analog and / or digital interfaces, a keyboard and / or a screen.
  • the control device can be connected to the direct print head via control lines.
  • An actuator controllable with the control device can be designed for moving the direct print head along the row of nozzles.
  • the control device can therefore be connected to the actuator via control lines.
  • the actuator can comprise an electric motor, a piezo drive, guide elements and / or a transmission.
  • the actuator can also be designed as a linear motor. It is conceivable that the actuator works electrically, pneumatically or hydraulically. An offset of the print image resulting from the use of different nozzle groups on the container can be compensated for by the actuator.
  • the container treatment machine can comprise a plurality of print heads for the one printing ink, on each of which one or more of the rows of nozzles are arranged.
  • the resolution can be increased by using several rows of nozzles within a direct print head.
  • the plurality of rows of nozzles can be arranged offset from one another.
  • the print height can be increased by at least partially overlapping the print areas of the direct print heads.
  • the container treatment machine for the one printing ink can comprise exactly one direct print head on which the at least one row of nozzles is arranged.
  • a container treatment machine 1 with a control device 13 for carrying out the direct printing method according to the invention is shown in a top view. It can be seen that the containers 2 are transferred from the distributor carousel 10 to the transport device 3, which is designed as a carousel, by means of an infeed star 11. There they are received in the container receptacles 4 each with a turntable and a centering bell (not shown here in detail). With the container receptacles 4, the containers 2 are first pretreated at the primer station 8, then moved to the individual direct print heads 5 A - 5 E and there each printed image in a printing color in one printing process.
  • the direct print heads 5 A - 5 e are connected to not shown ink supply units, each of the direct print heads 5 A - supply 5 E with a printing ink.
  • the direct print heads 5 A -5 E are supplied with the colors white, yellow, magenta, cyan and black.
  • the individual print images then together result in a multi-colored direct print.
  • the containers 2 are then cured with the curing device 9 and returned to the distributor carousel 10 with the discharge star 12.
  • the distribution carousel 10 or each transport device 3 rotate in the direction R 2 or R 1 about their respective vertical axes. It is conceivable, but not relevant to the invention, that several transport devices 3 with corresponding primer stations 8, direct print heads 5 and curing devices 9 are arranged as satellites on the distributor carousel 10. It is also conceivable that the and discharge stars 11, 12 connect the carousel 3 to a linear transport device.
  • a linear transport device can also be provided instead of the carousel 3.
  • the direct print heads 5 A - 5 E are arranged in a stationary manner on the transport device 3.
  • corresponding mounts for the direct print heads 5 A - 5 D are provided on the machine train (not shown here).
  • the containers 2 are each brought to a standstill on one of the direct print heads 5 A - 5 E , rotated by means of the container receptacles 4 and printed by the direct print heads 5 A - 5 D in the process.
  • the entire surface of the container can be printed.
  • molded containers with a surface that is not rotationally symmetrical can alternatively or additionally be transported further with the transport device 3 during printing (not shown here).
  • the direct print heads 5 A - 5 E are moved at least in sections along the container transport path by means of a moving unit with the containers 2.
  • control means 13 the entire container handling machine 1, and the direct printing heads 5 A - 5 E controls.
  • the control device 13 is connected to the individual components via control lines (not shown here).
  • the exemplary embodiments of the direct printing method described below are carried out by means of the control device 13 in connection with the direct printing heads 5 A - 5 E and optionally by rotating the container receptacles 4.
  • the control device 13 can also be connected to the actuators 6 of the exemplary embodiments of FIG Fig. 2 , 4 - 5 be connected to control the offset D.
  • FIG. 2 is a printing station of the container treatment machine 1 from FIG Fig. 1 shown in a side view. This just executes the direct printing method according to one of the following exemplary embodiments or claims 1-8. Since the previously described direct print heads 5 A -5 E or their printing stations are essentially identical in construction and only differ in terms of the color of the printing ink supplied, the structure of the printing station according to FIG Fig. 2 as well as the direct printing processes described below for all direct print heads 5 A - 5 E of the previous ones Fig. 1 equally.
  • the container 2 is received in the container receptacle 4 and is rotated about its axis A via a direct drive 7. It is also conceivable that the container receptacle 4 or the container 2 is rotated via a control cam or a central gear. This is not relevant to the invention itself.
  • the print image 2a is applied in a printing ink to the container 2 by means of the print nozzles 54 of the direct print head 5.
  • the direct print head 5 is designed with a nozzle plate 51 in which the print nozzles 54 are arranged in at least one row of nozzles, for example two or more are conceivable.
  • the pressure nozzles 54 are designed with piezo or thermocouples which shoot individual drops of ink 52 onto the container 2.
  • the gray value of the respective print image can be controlled by the amount or size of the ink droplets 52. It can also be seen that the print image 2a does not fill the full height of the print width of the direct print head 5.
  • the direct print head 5 can be moved in the H direction via an actuator 6.
  • the direction of travel H is here essentially parallel to the axis A of the container 2.
  • the function of the actuator 6 is explained below with reference to FIG Fig. 4 explained in more detail.
  • the printed image 2a can be generated on the container 2 over a large area.
  • This is initially monochromatic and only becomes a multi-colored direct print when it is printed with several different printing inks.
  • the multiple direct print heads 5 A - 5 E are in the Fig. 1 intended.
  • the container 2 is moved to several direct print heads with different printing inks arranged one above the other in the vertical direction (in the direction of the longitudinal axis of the container), for example with a lifting station for raising and lowering the container receptacle 4.
  • direct printing heads with different printing inks can also be used in the circumferential direction be arranged around the container 2, the container 2 with the container receptacle 4 being rotated about its longitudinal axis and the different printing inks being printed on from several sides.
  • the printing station or a plurality of such printing stations can be arranged in parallel on the transport device 3.
  • Direct printing methods described below can be used both with a single direct print head 5 and with all direct print heads 5 A - 5 E of the Fig. 1 be carried out individually or in any combination or together.
  • FIG. 3 an embodiment of the direct printing method is shown in an illustration.
  • the direct print head 5 is only shown in a plan view of the nozzle plate 51 for better illustration (applies equally to the Fig. 4 and 5 ), Indeed in operation it is typically in an arrangement as in the Fig. 2 , the nozzle plate 51 for discharging the ink droplets 52 pointing in the direction of the container 2.
  • the nozzle plate 51 comprises the two rows of nozzles 53a and 53b with the pressure nozzles 54.
  • the two rows of nozzles 53a and 53b are offset from one another in the longitudinal direction which corresponds to half the distance between two adjacent pressure nozzles 54 in the row of nozzles 53a.
  • the nozzle rows 53a and 53b have the same nozzle spacing.
  • the Indian Fig. 3 Container 2 shown belongs to a subgroup of a plurality of similar containers that are associated with the container treatment machine 1 from the Fig. 1 can be printed.
  • the print image 2a extends on the container 2 between a lower edge 2c and an upper edge 2b. This results in the pressure height G.
  • the lower edge 2c is at a distance C above the container bottom 2d.
  • the print image 2a has a smaller print height G than the length of the nozzle rows 53a or 53b, only printing ink is emitted from the nozzle group 55 when a first subgroup of the container 2 is printed.
  • This corresponds to its length according to the pressure height G and includes the pressure nozzles 54 of the two rows of nozzles 53a, 53b within this height.
  • the container type of the container 2, a template for the print image 2a and the desired position, i.e. the height C, are stored in the control device 13 of the container treatment machine 1 ( Fig. 1 ), deposited. Since the position of the direct print head 5 is also stored there, the variable A can be calculated from this, which characterizes the distance between the container base 2d and the lower end 56 of the rows of nozzles 53a, 53b.
  • the currently active nozzle group 55 has the offset B opposite the end 56 of the nozzle row 53a, 53b, which does not correspond exactly to the lower edge 2c of the print image 2a.
  • all pressure nozzles 54 of both nozzle rows 53a, 53b are active within the pressure height G.
  • the pressure nozzles located in the area E and B above the nozzle group 55 are initially not active. This all applies to the printing of a first subgroup of the containers 2.
  • the offset B ' is selected to be somewhat larger than the offset B, so that the second nozzle group 55' is higher or lower overall.
  • the print image 2a on the container 2 is shifted slightly upwards.
  • This method is advantageous for printing, since opposite the nozzle group 55 at the upper edge of the nozzle group 55 ' further pressure nozzles 54 are activated. As a result, there is also a regular flow of ink through these pressure nozzles, making them less prone to clogging.
  • further subgroups can be printed with different offset values, which are selected in particular within a range that does not guarantee any loss of quality caused by the corresponding offset of the direct printing.
  • the offset B is set with a zigzag curve or sawtooth curve between extreme points to such an extent that all of the print nozzles 54 of the direct print head 5 are activated cyclically. It is also conceivable that the offset B is changed statistically, that is to say randomly.
  • the various nozzle groups 55 and thus the offset B are determined in that the amount of ink of each printing nozzle 54 for a printing process is determined from the print image. This is done by integrating the image lines of the print image 2a or a print template. The values of the offset B are now set in such a way that a minimum amount of printing ink is guaranteed for all subgroups of the container 2. It is also conceivable that the respectively activated nozzle groups are determined so that the ink quantity averaged over several printing processes is uniform for all printing nozzles 54. As a result, the pressure nozzles 54 are stressed particularly evenly.
  • the print image 2a is printed with a lower print resolution than the distance between the nozzles 54 in the nozzle rows 53a, 53b allows.
  • the print image 2a can be printed with half the possible print resolution. This means that only the pressure nozzles 54 within the nozzle row 53a are activated for a first subgroup of the containers 2.
  • the pressure nozzles 54 of the other nozzle row 53b which are arranged parallel thereto, are activated within the pressure height G.
  • the print image 2a is offset by half the distance between two adjacent print nozzles 54 of a nozzle row 53a, but this is barely perceptible to the consumer. This is particularly favorable since the pressure nozzles 54 of both rows of nozzles 53a, 53b are stressed despite the reduced print resolution.
  • FIG. 4 a further embodiment of the direct printing method is shown in an illustration. This differs from the previous embodiment in FIG Fig. 3 only in that the direct print head 5 is also moved in the H direction with the actuator 6.
  • the direct print head 5 is also moved in the H direction with the actuator 6.
  • Features described above are also possible in any combination in this exemplary embodiment.
  • the activated nozzle group 55 has the offset B to the end 56 of the nozzle rows 53a and 53b.
  • the direct print head 5 has been moved downward by an offset D from a reference point P 0 by the actuator 6. Because the offset B and the offset D have the same amount, a shift of the printed image 2a on the container 2 is compensated for. If a correspondingly larger or smaller offset B is now selected, the direct print head 5 is moved in the opposite direction by the corresponding offset D so that the print image 2a is always at the same height C on the container 2 opposite the container bottom 2d.
  • FIG. 5 a further embodiment of the direct printing method is shown in an illustration. This differs from the previous exemplary embodiments in FIG Fig. 3 and 4th only in that two offset direct print heads 50a, 50b are used for printing a container 2 for a greater print height.
  • two offset direct print heads 50a, 50b are used for printing a container 2 for a greater print height.
  • Features described above are also possible in any combination in this exemplary embodiment.
  • the direct printing module 50 comprises two direct printing heads 50a, 50b for one printing ink, which are offset from one another in the direction of the printing height G of the printed image 2 and overlap in the area F. Since the direct print heads 50a and 50b each correspond to a direct print head 5 of the previous exemplary embodiments, the possible print height of the print image 2a is approximately doubled. However, the direct print heads 50a and 50b are controlled in such a way that the overlap area 2e of the print image 2a is printed by both with half the required amount of ink (stitching).
  • the direct print heads 50a, 50b each have two rows of nozzles 53aa, 53ab and 53ba, 53bb, respectively.
  • the rows of nozzles 53aa, 53ab or 53ba, 53bb of a direct print head 50a or 50b are each offset from one another in order to increase the resolution.
  • the two in terms of the Fig. 3 and 4th The direct printing method described here can now also be carried out with the entire direct printing module 50 in order to shift the nozzle group 55 activated for the print image 2a by means of the offset B for each container subgroup.
  • the print nozzles at the upper edge of the direct print head 50a or at the lower edge of the direct print head 50b are regularly activated, whereby ink residues are flushed out.
  • the entire direct printing module 50 is additionally shifted via the actuator 6 in the direction of the rows of nozzles 53aa, 53ab or 53ba, 53bb in order to compensate for the offset B.
  • the printed image 2a on the container 2 always remains at the same height in relation to the container bottom. This is particularly advantageous because, regardless of the height of the print image 2a, all of the print nozzles 54 of the direct print module 50 are activated cyclically in the same way.
  • printing nozzles arranged alternately in a row of nozzles are provided.

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  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)

Claims (12)

  1. Procédé d'impression directe pour imprimer une pluralité de récipients similaires (2), en particulier des récipients de boisson, dans lequel plusieurs buses d'impression (54) agencées en au moins une ligne de buses (53a, 53b, 53aa, 53ab, 53ba, 53bb) produisent à chaque opération d'impression une image d'impression (2a) dans une couleur d'impression sur un récipient (2),
    caractérisé
    en ce que pour l'impression d'une seule et même image d'impression (2a) sur différents sous-groupes de récipients (2) dans une couleur d'impression, un autre groupe de buses (55) respectif est chaque fois activé,
    en ce que les buses d'impression (54) de deux des groupes de buses (55) sont agencées de manière alternée dans ladite au moins une ligne de buses (53a, 53b, 53aa, 53ab, 53ba, 53bb),
    en ce que chacun des groupes de buses (55) présente un déport (B) à l'extrémité (56) de la ligne de buses (53a, 53b), et dans lequel le groupe de buses (55) respectif est activé par un changement du déport (B), et
    en ce que le déport (B) est changé de manière cyclique ou statistique.
  2. Procédé d'impression directe selon la revendication 1, dans lequel ladite au moins une ligne de buses (53a, 53b) est commandée entre les opérations d'impression par un actionneur (6) avec un décalage (D) opposé au déport (B) respectif, pour compenser un déplacement de l'image d'impression (2a) sur le récipient (2) provoqué par le déport (B).
  3. Procédé d'impression directe selon la revendication 2, dans lequel le décalage (D) et le déport (B) ont la même valeur.
  4. Procédé d'impression directe selon l'une des revendications précédentes, dans lequel la quantité d'encre de chaque buse d'impression (54) pour une opération d'impression est établie à partir de l'image d'impression (2) et les groupes de buses (55) sont ainsi déterminés de telle sorte que toutes les buses d'impression (54) de ladite au moins une ligne de buses (53a, 53b) sont activées cycliquement ou statistiquement.
  5. Procédé d'impression directe selon la revendication 4, dans lequel les groupes de buses activés respectifs (55) sont déterminés de telle sorte que pour toutes les buses d'impression (54), la quantité d'encre moyenne sur plusieurs opérations d'impression dépasse une valeur seuil qui évite en particulier une obstruction de la buse d'impression (54).
  6. Procédé d'impression directe selon la revendication 4 ou 5, dans lequel les groupes de buses activés respectifs (55) sont déterminés de telle sorte que pour toutes les buses d'impression (54), la quantité d'encre moyenne sur plusieurs opérations d'impression est uniforme.
  7. Procédé d'impression directe selon l'une des revendications précédentes, dans lequel ladite au moins une ligne de buses (53a, 53b) pour ladite couleur d'impression est agencée sur une seule et unique tête d'impression directe (5) ou plusieurs lignes de buses (53aa, 53ab, 532ba, 53bb) pour ladite couleur d'impression sont distribuées sur plusieurs têtes d'impression directe (50a, 50b) .
  8. Procédé d'impression directe selon l'une des revendications précédentes, dans lequel les buses d'impression (54) sont agencées en plusieurs lignes de buses parallèles (53a, 53b) qui présentent un décalage entre elles en direction longitudinale correspondant en particulier à une fraction de la distance entre deux buses d'impression voisines (54) dans une même ligne de buses (53a), en particulier à la moitié, au tiers ou au quart de la distance.
  9. Machine de traitement de récipients (1) pour l'impression de récipients (2) avec au moins une tête d'impression directe (5, 50a, 50b) sur laquelle plusieurs buses d'impression (54) pour une couleur d'impression sont agencées en au moins une ligne de buses (53a, 53b, 53aa, 53ab, 53ba, 53bb) qui est conformée pour imprimer sur les récipients (2) une image d'impression (2a) dans une couleur d'impression par une opération d'impression correspondante,
    caractérisée
    en ce que la machine de traitement de récipients (1) comporte un dispositif de commande (13) de la tête d'impression directe (5, 50a, 50b) pour l'exécution du procédé selon l'une des revendications 1 à 8.
  10. Machine de traitement de récipients selon la revendication 9, dans laquelle un actionneur (6) contrôlable par le dispositif de commande (13) est conformé pour le procédé de la tête d'impression directe (5) le long de la ligne de buses (53a 53b).
  11. Machine de traitement de récipients selon la revendication 9 ou 10, dans laquelle la machine de traitement de récipients comporte plusieurs têtes d'impression directe (50a, 50b) pour ladite une couleur d'impression sur lesquelles une ou plusieurs desdites lignes de buses (53aa, 53ab, 532ba, 53bb) sont respectivement agencées.
  12. Machine de traitement de récipients selon la revendication 9 ou 10, dans laquelle la machine de traitement de récipients pour ladite une couleur d'impression comporte exactement une tête d'impression directe (5) sur laquelle ladite au moins une ligne de buses (5) est agencée.
EP16757606.5A 2015-10-19 2016-08-18 Procédé d'impression directe et machine de traitement de récipient permettant l'impression d'une pluralité de récipients de structure similaire Active EP3365176B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220287.9A DE102015220287A1 (de) 2015-10-19 2015-10-19 Direktdruckverfahren und Behälterbehandlungsmaschine zur Bedruckung einer Vielzahl von gleichartigen Behältern
PCT/EP2016/069590 WO2017067689A1 (fr) 2015-10-19 2016-08-18 Procédé d'impression directe et machine de traitement de récipient permettant l'impression d'une pluralité de récipients de structure similaire

Publications (2)

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EP3365176A1 EP3365176A1 (fr) 2018-08-29
EP3365176B1 true EP3365176B1 (fr) 2021-06-09

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EP (1) EP3365176B1 (fr)
CN (1) CN108136782A (fr)
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DE102017215431A1 (de) * 2017-09-04 2019-03-07 Krones Ag Direktdruckmaschine und -verfahren zur Bedruckung von Behältern mit einem mehrfarbigen Direktdruck
CN112644177A (zh) * 2020-12-29 2021-04-13 东莞市图创智能制造有限公司 沿周向打印的打印设备

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JP3111024B2 (ja) * 1995-07-19 2000-11-20 キヤノン株式会社 カラーフィルタの製造装置及び製造方法及び表示装置の製造方法及び表示装置を備えた装置の製造方法
US6601935B2 (en) * 2001-08-01 2003-08-05 Hewlett-Packard Development Company, L.P. Data driven pen nozzle masks
US20030081024A1 (en) * 2001-10-31 2003-05-01 Vives Joan Carles Printing system adapted to shift nozzle use
JP3903030B2 (ja) * 2003-09-09 2007-04-11 松下電器産業株式会社 インクジェット式記録システム
US7350902B2 (en) * 2004-11-18 2008-04-01 Eastman Kodak Company Fluid ejection device nozzle array configuration
JP5891602B2 (ja) * 2011-04-28 2016-03-23 東洋製罐株式会社 インクジェット印刷装置及びこれを用いたシームレス缶の印刷方法
DE102012023017A1 (de) * 2012-11-26 2014-05-28 Heidelberger Druckmaschinen Ag Erhöhung der Inkjetmodul-Lebensdauer
DE102014206730A1 (de) * 2014-04-08 2015-10-08 Krones Ag Vorrichtung und Verfahren für den Tintenstrahldruck auf Behälter

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DE102015220287A1 (de) 2017-04-20
CN108136782A (zh) 2018-06-08
EP3365176A1 (fr) 2018-08-29

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