EP3348410B1 - Can blank and processing method for a cavity - Google Patents

Can blank and processing method for a cavity Download PDF

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Publication number
EP3348410B1
EP3348410B1 EP17151845.9A EP17151845A EP3348410B1 EP 3348410 B1 EP3348410 B1 EP 3348410B1 EP 17151845 A EP17151845 A EP 17151845A EP 3348410 B1 EP3348410 B1 EP 3348410B1
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EP
European Patent Office
Prior art keywords
hollow body
printed image
screen ruling
screen
print area
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.)
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Application number
EP17151845.9A
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German (de)
French (fr)
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EP3348410A1 (en
Inventor
Alexander Hinterkopf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hinterkopf GmbH
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Hinterkopf GmbH
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Filing date
Publication date
Application filed by Hinterkopf GmbH filed Critical Hinterkopf GmbH
Priority to ES17151845T priority Critical patent/ES2737953T3/en
Priority to EP17151845.9A priority patent/EP3348410B1/en
Publication of EP3348410A1 publication Critical patent/EP3348410A1/en
Application granted granted Critical
Publication of EP3348410B1 publication Critical patent/EP3348410B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • B41M5/0088—Digital printing on bodies of particular shapes by ink-jet 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
    • 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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • 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 can blank with a hollow body, which is provided on an outer surface with a carrier coating on which a printed image, in particular in the ink jet printing method, is applied, wherein the printed image is formed from a plurality of individual points, each spaced at a predetermined grid spacing from each other wherein a first print area of the print image has a first raster width and a second print area of the print image has a second raster width which is different from the first raster width. Furthermore, the invention relates to a processing method for a hollow body.
  • a printing device for printing a peripheral surface of an article with at least two printheads wherein the printheads each have at least one row of Farbdosierianan, in particular ink nozzles, which are each formed for an individual predetermined delivery of color to the object and wherein at least one of the printheads is movably arranged along an extension axis of the Farbdosierieri on a print head carrier and that the movably mounted print head is associated with an electrically controllable adjusting means for adjusting a relative position relative to the at least one further print head.
  • EP-A-2 500 177 discloses a can blank with a hollow body.
  • the object of the invention is to provide a can blank as well as a processing method for a hollow body, with which an improved surface of the can blank can be realized.
  • the second raster width lies outside a raster interval, which is arranged around the raster width of the first printing area and that the second raster width is adapted to a subsequent, printing of plastic, deformation of the can blank, that the second raster width after the plastic deformation of the second print area lies within the raster interval by the first raster width.
  • a can blank in particular from a kneadable metallic material, preferably an aluminum alloy, prepared and understood at least one end portion open hollow body, which is at least provided with a carrier coating and partially with a printed image.
  • a kneadable metallic material preferably an aluminum alloy
  • the grid interval which is around the first grid spacing, can be a limited interval or an infinite interval.
  • a limited interval includes a lower bound and an upper bound, where a distance between the lower bound and the first raster width may be equal to or different from a distance between the first raster and the upper bound.
  • the grid interval always includes the first grid width, possibly also as an interval boundary.
  • the grid interval is a tolerance range within which those screen rulings are considered that are considered to belong to the first screen ruling.
  • the raster interval can have as upper limit and as lower limit those raster widths that result as a deviation by a predetermined percentage amount from the first raster width.
  • the first raster width represents a resolution of 300 dpi (dots per inch) and thus an amount for the first raster width in the range of about 85/1000 mm is located.
  • the grid interval has a lower limit of 80/1000 mm and an upper limit of 90/1000 mm, so that individual points which are arranged at a distance of 80/1000 mm to 90/1000 mm from each other, as the first ruling be associated.
  • the second raster width is chosen such that the plastic deformations provided after the execution of the printing process, at least for partial regions of the hollow body, in particular for the second printing region, result in the second raster width being within the raster interval at the end of the deformation processes.
  • the deformation processes can be either expansion processes or compression processes for the can blank.
  • the second raster width is either smaller or larger than the first raster width and the raster width values contained in the associated raster interval in order to be within the raster interval after the deformation processes have been carried out.
  • the can blanks which are typically of sleeve-shaped design with a circular cylindrical cross-section, are drawn in sections at an open end region.
  • a diameter reduction of an outer diameter of the can blank in the range of 53 millimeters to about 25 millimeters be provided.
  • a plurality of pressure areas are provided, the screen widths are each adapted to a subsequent printing process, partially different plastic deformation of the can blank that the screen rulings of the pressure areas are after the plastic deformation within the raster arranged around the first grid interval.
  • each pressure region is designed as an annular, in particular single-row, arrangement of individual points and if a distance between adjacent pressure regions is proportional to a change in distance experienced by the adjacent pressure regions during the plastic deformation of the hollow body.
  • a central axis of the respective pressure region is aligned coaxially with a central axis of the can blank.
  • adjacent pressure areas are arranged such that they have after the implementation of the deformation for the can blank at a distance corresponding to a distance of the respective pressure range to a respective further adjacent pressure range.
  • center axes of the pressure areas have a predeterminable, in particular acute, angle to the central axis of the can blank and / or are formed as helical sections and thus as open rings. Also in this case, there is a distance between the individual points of the adjacent pressure areas, which is selected so that after a deformation of the can blank, the individual points of a plurality of adjacently arranged pressure sections each at least have almost the same distance.
  • Such a configuration of the pressure areas is to be provided, in particular, if an axial lengthening or shortening of the respective pressure areas occurs in the course of the deformation of the can blank.
  • a ratio between the raster width of the first pressure range and the raster width of the second pressure range is proportional to a change in diameter that is provided for the second pressure range during the plastic deformation of the hollow body.
  • the pressure ranges are assumed to be a particularly relevant for the practice diameter reduction for the second pressure range relative to the first pressure range, as typically occurs in the Einziehvorgang to provide a mounting interface on the can blank for a spray valve.
  • the can blank is at least partially tapered with respect to its diameter, so that for those pressure ranges that are within the taper zone, a reduction of the respective grid width occurs.
  • the grid widths of the respective pressure areas are preferably matched to the tapering process in such a way that at least substantially the same grid width is present for all of the pressure areas after the deformation has ended. If, for example, the diameter for the second pressure range before performing the deformation is twice the diameter for the second pressure range after deformation, the second screen width should preferably be selected such that it is also twice as large as after deformation before deformation.
  • the printed image is provided with a protective coating and that the carrier coating and / or the protective coating are formed as a solvent-containing lacquer layer, preferably as a water-based lacquer layer, particularly preferably as a polar lacquer layer, in particular as a thermoplastic lacquer layer.
  • the object of the protective coating is to protect the printed image after completion of the printing process and before the beginning of the deformation process as completely as possible against external influences, in particular mechanical influences.
  • the subsequent printing of the deformation of the can blank which typically takes place with deformation tools that engage the outer surface of the can blank and thus also on the printed image, it is advantageous if the printed image is protected by the protective coating.
  • the protective coating is preferably a transparent protective lacquer. It is particularly preferred that the protective coating is applied to the can blank on the basis of a solvent-containing paint. In this case, the solvent-containing paint at least partially water as the solvent and after evaporation of the solvent form a polar lacquer layer. As a result, a bond of the protective coating is favored to the underlying printed image, which is formed in particular of polar, thermosetting individual points. Thus, even with strong temperature changes, which act on the can blank, be ensured that no detachment of the protective coating from the printed image. It when the protective coating has an identical or at least similar structure as a carrier coating, which is applied directly to the, in particular metallic, outer surface of the hollow body and which forms the basis for the printed image is particularly advantageous.
  • the printed image is enclosed between two layers, which have a similar or identical coefficient of thermal expansion and thus enables an advantageous fatigue strength for a decor of the hollow body, which is formed by the carrier coating, the printed image and the protective coating.
  • the individual points of the printed image are formed as duroplastic printing ink dots.
  • This allows application of the print image with an ink jet printing process in which an ink jet print head emits a plurality of individual paint droplets onto the outer surface of the hollow body.
  • the applied paint droplets are cured by energetic activation, in particular by irradiation with ultraviolet light.
  • the use of a thermosetting printing ink and a rapid curing of the ink droplets after striking the outer surface of the can blank ensures a defined geometry for each of the color droplets, so that the printed image can meet high requirements in terms of optical resolution and sharpness.
  • the polymer chains of the thermosetting printing ink have polar properties, so that when using a polar protective coating and / or a polar carrier coating, a favorable chemical bond between the printed image and the coating layers can be achieved.
  • the processing method comprises the following steps: providing a hollow body to a painting device and applying a carrier coating on an outer surface of the hollow body, providing the coated hollow body to a printing device and printing the hollow body with a printed image, which is formed from a plurality of individual points, which are each spaced apart in a predetermined grid spacing, wherein a first pressure range on the Outer surface of the hollow body is printed with a first screen pitch and a second printing area on the outer surface of the hollow body with a second screen pitch, which is different from the first screen pitch and wherein the second screen pitch lies outside a screen interval, which surrounds the screen width of the first printing area and wherein the second raster width is adapted to a subsequent printing, the region-wise plastic deformation of the hollow body such that the second raster width after the plastic deformation of the second printing area within the raster interval to the e rst grid width is.
  • the production of the printed image preferably takes place in a circumferential printing process, in which the individual dots are applied by a rotational relative movement between a printing head and the can blank, which takes place about a longitudinal axis of the can blank.
  • a variation of the screen width can be done for example by influencing the angular velocity between the print head and can blank.
  • an influence on a droplet release rate ie a number of droplets per unit of time, can be provided for the droplets provided by the print head.
  • the printed image with a plurality of pressure areas on the outer surface is applied to the hollow body, wherein the screen widths of the printing areas are each adapted to a subsequent printing process, regional plastic deformation of the hollow body, that the screen rulings of the printing areas after the plastic deformation within the raster interval are the first grid.
  • the printed image in particular in an ink-jet printing process, is applied in such a way that a distance between adjacent print areas is proportional to a change in distance experienced by the adjacent print areas during the plastic deformation of the hollow body.
  • the printed image in particular in an ink jet printing process, is applied such that a ratio between the raster width of the first printing area and the raster width of the second printing area is proportional to a change in diameter provided for the second printing area in the plastic deformation of the hollow body is.
  • the carrier coating and / or the protective coating with a solvent-containing paint, preferably with a water-based paint, more preferably with a polar paint, in particular with a thermoplastic paint done.
  • the printed image with an ink jet printing process preferably with a freely programmable Ink jet printer, particularly preferably during a freely adjustable rotational movement of the hollow body about a central axis, in particular using a thermosetting printing ink, is applied to the outer surface of the hollow body.
  • the inkjet printer comprises at least one print head with a line-shaped arrangement of printing nozzles, wherein the printing nozzles are preferably lined up and aligned parallel to the central axis of the can blank. A distance between the printing nozzles to each other determines a distance annular formed pressure ranges, provided that no linear relative movement of the print head is provided parallel to the central axis of the can blank during the execution of the printing operation.
  • the pressure nozzles are controlled by a control unit, which in particular can influence a dispensing rate (number of droplets per unit of time) for the ink droplets discharged from the printing nozzles, in particular individually for each of the printing nozzles. Furthermore, it can be provided that the control unit can also influence a rotational speed of the can blank about its central axis. With the help of these measures, an individual determination of the screen ruling can be made for each pressure range.
  • a simultaneous printing of multiple pressure areas with different screen width can be made, wherein the pressure areas each comprise one or more rows of circumferentially applied to the can blank individual points and wherein distances between the rows of individual points of division correspond to the pressure nozzles.
  • it can be provided to move the print head linearly during the printing process, in order to achieve a reduction in the distances between the rows of individual points.
  • the hollow body is plastically deformed after application of the printed image and the protective coating at an open end region with a Einziehmaschine and in this case there is a change in the screen width of the second printing area.
  • An Indian FIG. 1 illustrated, deformed can blank 1 is designed as aerosol can blank and for filling with a liquid, such as a perfume or deodorant, and a compressed gas, such as propane or butane, provided.
  • the can blank 1 according to the FIG. 1 is in a manner not shown by means of a non-illustrated Einziehmaschine in a variety of processing steps with suitable deformation tools from the in the FIGS. 2 to 4 shown undeformed can blank 1 produced.
  • the undeformed can blank 1 is preferably designed as a one-sided, circular cylindrical sleeve and accordingly has a circular cylindrical jacket-shaped outer surface 2.
  • the can blank 1 is made of an aluminum alloy and is first provided with a carrier paint, not shown, then to the one in the neckline enlargements according to the FIGS. 1 to 4 in each case only a purely schematically represented printed image, in particular in an ink-jet printing process, is applied.
  • the can blank 1 is rotated about a central axis 3 and an opposite to the outer surface 2 arranged, not shown printhead, which may optionally be moved linearly movable along the central axis 3, in a predeterminable manner for dispensing individual drops the outer surface 2 is formed.
  • the printed image at an upper end portion 4 of the can blank 1 is divided into five pressure ranges 5 to 8, wherein in each of the pressure ranges 5 to 8, a different screen width for the individual drops, so a distance between adjacent individual drops is provided.
  • the pressure regions 7 and 8 are formed to a greater extent than the pressure region 6; accordingly, the pressure regions 7 and 8 have different screen rulings than the pressure regions 5 and 6.
  • the grid widths of the respective pressure areas 6 to 8 are adapted to the respective deformation of the corresponding pressure range 6 to 8, that after performing the Einziehvorgangs and the associated change in diameter for the individual pressure ranges 6 to 8 in all pressure ranges. 6 to 8 at least almost the same screen ruling for the individual points is present, as shown schematically in the FIG. 1 is shown. It is particularly preferred that the grid width for the individual points in the pressure ranges 6 to 8 with the grid width of the individual points in the printing area 5, which undergoes no geometric change during the deformation of the can blank 1, match.
  • a variation of a distance 24, 25 between the individual points 21 is provided exclusively in the circumferential direction (X direction).
  • An axial length change is not provided in this case, so that a distance 26 between adjacent rows of individual points, of which in the FIG. 3 for reasons of clarity, only the individual rows of points 22 and 23 are designated, is not changed by the deformation and thus even when applying the printed image on the can blank 1 need not be considered.
  • FIG. 1 shown can blank 1, the following procedure provided: In a first step, in a manner not shown, an application of a carrier coating on the hollow body, also not shown in detail, which is in particular a metallic hollow body made of an aluminum alloy.
  • a protective coating on the outer surface 2 of the can blank 1, wherein the protective coating is used in particular as a protective layer against mechanical stress on the printed image, as they may occur in the subsequent deformation of the can blank 1.
  • the objective of the printing process for applying the printed image is to select the screen width for the individual points such that, after the deformation has been carried out for the can blank 1, a uniform, in particular identical, screen ruling for all individual points results.
  • a favorable optical appearance for the finished can blank 1 is ensured.
  • these measures also an undesirable Layer thickness change for the applied to the hollow body coating, which comprises the carrier coating, the printed image and the protective coating, at least largely reduced or prevented.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Printing Methods (AREA)
  • Ink Jet (AREA)

Description

Die Erfindung betrifft einen Dosenrohling mit einem Hohlkörper, der an einer Außenoberfläche mit einer Trägerlackierung versehen ist, auf die ein Druckbild, insbesondere im Tintenstrahldruckverfahren, aufgebracht ist, wobei das Druckbild aus einer Vielzahl von Einzelpunkten gebildet ist, die jeweils in einer vorgebbaren Rasterweite voneinander beabstandet sind, wobei ein erster Druckbereich des Druckbilds eine erste Rasterweite und ein zweiter Druckbereich des Druckbilds eine zweite Rasterweite aufweist, die von der ersten Rasterweite verschieden ist. Ferner betrifft die Erfindung ein Bearbeitungsverfahren für einen Hohlkörper.The invention relates to a can blank with a hollow body, which is provided on an outer surface with a carrier coating on which a printed image, in particular in the ink jet printing method, is applied, wherein the printed image is formed from a plurality of individual points, each spaced at a predetermined grid spacing from each other wherein a first print area of the print image has a first raster width and a second print area of the print image has a second raster width which is different from the first raster width. Furthermore, the invention relates to a processing method for a hollow body.

Aus der EP 2 860 036 A1 ist eine Druckeinrichtung zur Bedruckung einer Umfangsoberfläche eines Gegenstands mit wenigstens zwei Druckköpfen bekannt, wobei die Druckköpfe jeweils wenigstens eine Reihenanordnung von Farbdosierelementen, insbesondere Farbdüsen, aufweisen, die jeweils für eine individuelle vorgebbare Abgabe von Farbe auf den Gegenstand ausgebildet sind und wobei wenigstens einer der Druckköpfe beweglich längs einer Erstreckungsachse der Farbdosierelemente an einem Druckkopfträger angeordnet ist und dass dem beweglich gelagerten Druckkopf eine elektrisch ansteuerbare Einstelleinrichtung für eine Einstellung einer Relativposition gegenüber dem wenigstens einen weiteren Druckkopf zugeordnet ist. EP-A-2 500 177 offenbart einer Dosenrohling mit einem Hohlkörper.From the EP 2 860 036 A1 a printing device for printing a peripheral surface of an article with at least two printheads is known, wherein the printheads each have at least one row of Farbdosierelementen, in particular ink nozzles, which are each formed for an individual predetermined delivery of color to the object and wherein at least one of the printheads is movably arranged along an extension axis of the Farbdosierelemente on a print head carrier and that the movably mounted print head is associated with an electrically controllable adjusting means for adjusting a relative position relative to the at least one further print head. EP-A-2 500 177 discloses a can blank with a hollow body.

Die Aufgabe der Erfindung besteht darin, einen Dosenrohling sowie ein Bearbeitungsverfahren für einen Hohlkörper bereitzustellen, mit denen eine verbesserte Oberfläche des Dosenrohlings verwirklicht werden kann.The object of the invention is to provide a can blank as well as a processing method for a hollow body, with which an improved surface of the can blank can be realized.

Diese Aufgabe wird für einen Dosenrohling der eingangs genannten Art mit den Merkmalen des Anspruchs 1 gelöst. Hierbei ist vorgesehen, dass die zweite Rasterweite außerhalb eines Rasterintervalls liegt, das um die Rasterweite des ersten Druckbereichs angeordnet ist und dass die zweite Rasterweite derart an eine dem Druckvorgang nachfolgende, bereichsweise plastische Deformation des Dosenrohlings angepasst ist, dass die zweite Rasterweite nach der plastischen Deformation des zweiten Druckbereichs innerhalb des Rasterintervalls um die erste Rasterweite liegt.This object is achieved for a can blank of the type mentioned with the features of claim 1. In this case, it is provided that the second raster width lies outside a raster interval, which is arranged around the raster width of the first printing area and that the second raster width is adapted to a subsequent, printing of plastic, deformation of the can blank, that the second raster width after the plastic deformation of the second print area lies within the raster interval by the first raster width.

Nachstehend wird unter einem Dosenrohling ein, insbesondere aus einem knetbaren metallischen Material, vorzugsweise einer Aluminiumlegierung, hergestellter und an wenigstens einem Endbereich offener Hohlkörper verstanden, der zumindest mit einer Trägerlackierung und bereichsweise mit einem Druckbild versehen ist.Below is a can blank, in particular from a kneadable metallic material, preferably an aluminum alloy, prepared and understood at least one end portion open hollow body, which is at least provided with a carrier coating and partially with a printed image.

Bei dem Rasterintervall, das um die erste Rasterweite angeordnet ist, kann es sich um ein beschränktes Intervall oder um ein unbeschränktes Intervall handeln. Ein beschränktes Intervall umfasst eine Untergrenze sowie eine Obergrenze, wobei ein Abstand zwischen der Untergrenze und der ersten Rasterweite gleich oder verschieden zu einem Abstand zwischen der ersten Rasterweite und der Obergrenze sein kann. Das Rasterintervall umfasst stets die erste Rasterweite, gegebenenfalls auch als Intervallgrenze. In der Praxis handelt es sich bei dem Rasterintervall um einen Toleranzbereich, innerhalb dessen diejenigen Rasterweiten enthalten sind, die als der ersten Rasterweite zugehörig angesehen werden. Exemplarisch kann das Rasterintervall als Obergrenze und als Untergrenze diejenigen Rasterweiten aufweisen, die sich als Abweichung um einen vorgegebenen prozentualen Betrag von der ersten Rasterweite ergeben. Beispielhaft ist vorgesehen, dass die erste Rasterweite eine Auflösung von 300 dpi (dots per inch) repräsentiert und somit ein Betrag für die erste Rasterweite im Bereich von ca. 85/1000 mm angesiedelt ist. Ferner kann beispielhaft vorgesehen werden, dass das Rasterintervall eine Untergrenze von 80/1000 mm und eine Obergrenze von 90/1000 mm aufweist, so dass Einzelpunkte, die in einem Abstand von 80/1000 mm bis 90/1000 mm zueinander angeordnet sind, als der ersten Rasterweite zugehörig angesehen werden.The grid interval, which is around the first grid spacing, can be a limited interval or an infinite interval. A limited interval includes a lower bound and an upper bound, where a distance between the lower bound and the first raster width may be equal to or different from a distance between the first raster and the upper bound. The grid interval always includes the first grid width, possibly also as an interval boundary. In practice, the grid interval is a tolerance range within which those screen rulings are considered that are considered to belong to the first screen ruling. By way of example, the raster interval can have as upper limit and as lower limit those raster widths that result as a deviation by a predetermined percentage amount from the first raster width. By way of example, it is provided that the first raster width represents a resolution of 300 dpi (dots per inch) and thus an amount for the first raster width in the range of about 85/1000 mm is located. Furthermore, it can be provided by way of example that the grid interval has a lower limit of 80/1000 mm and an upper limit of 90/1000 mm, so that individual points which are arranged at a distance of 80/1000 mm to 90/1000 mm from each other, as the first ruling be associated.

Die zweite Rasterweite ist derart gewählt, dass die nach der Durchführung des Druckvorgangs zumindest für Teilbereiche des Hohlkörpers, insbesondere für den zweiten Druckbereich, vorgesehenen plastischen Deformationen dazu führen, dass die zweite Rasterweite am Ende der Deformationsvorgänge innerhalb des Rasterintervalls liegt. Bei den Deformationsvorgängen kann es sich wahlweise um Ausdehnungsvorgänge oder Stauchungsvorgänge für den Dosenrohling handeln. In Abhängigkeit davon ist die zweite Rasterweite vor der Durchführung der Deformationsvorgänge entweder kleiner oder größer als die erste Rasterweite und die im zugehörigen Rasterintervall enthaltenen Rasterweitenwerte, um nach der Durchführung der Deformationsvorgänge innerhalb des Rasterintervalls zu liegen. Durch diese Maßnahme wird für den Dosenrohling im Hinblick auf die wenigstens zwei Druckbereiche nach der Durchführung der Deformationsvorgänge eine zumindest im Wesentlichen einheitliche Auflösung für das Druckbild erzielt. Dies ist im Hinblick auf die grafische Darstellung und Auflösung des Druckbilds vorteilhaft und ermöglicht eine zumindest eine gewisse Angleichung der Schichtdicken für die zur Durchführung des Druckvorgangs genutzten Farbschichten in den unterschiedlichen Druckbereichen.The second raster width is chosen such that the plastic deformations provided after the execution of the printing process, at least for partial regions of the hollow body, in particular for the second printing region, result in the second raster width being within the raster interval at the end of the deformation processes. The deformation processes can be either expansion processes or compression processes for the can blank. Depending on this, before performing the deformation processes, the second raster width is either smaller or larger than the first raster width and the raster width values contained in the associated raster interval in order to be within the raster interval after the deformation processes have been carried out. By virtue of this measure, an at least substantially uniform resolution for the printed image is achieved for the can blank with regard to the at least two printing regions after the deformation processes have been carried out. This is in view of the graphic representation and resolution of the printed image advantageous and allows at least a certain approximation of the layer thicknesses used for carrying out the printing process color layers in the different pressure ranges.

Im Hinblick auf die vorgesehenen plastischen Deformationen für den Dosenrohling ist davon auszugehen, dass der typischerweise mit kreiszylindrischem Querschnitt hülsenförmig ausgebildete Dosenrohling an einem offenen Endbereich abschnittsweise eingezogen wird. Im Zuge dieses Einziehvorgangs, der insbesondere zur Bildung einer Montageschnittstelle am Dosenrohling für ein Sprühventil dient, wie es bei einer Verwendung des Dosenrohlings als Aerosoldose eingesetzt wird, kann rein exemplarisch eine Durchmesserreduzierung von einem Außendurchmesser des Dosenrohling im Bereich von 53 Millimetern auf ca. 25 Millimeter vorgesehen sein. Hiermit ist eine erhebliche Stauchung des vorzugsweise knetbaren Metallmaterials, insbesondere der Aluminiumlegierung, sowie der darauf aufgebrachten Lack- und Farbschichten des Dosenrohlings verbunden, die bei einer einheitlichen Rasterweite des Druckbilds zu einer Vergrößerung der Schichtdicke für das Druckbild führen würde. Dementsprechend ist vorgesehen, für das auf den noch nicht deformierten Dosenrohling aufzubringende Druckbild die, insbesondere während eines Einziehvorgangs für den zweiten Druckbereich vorgesehene, nachfolgende Deformation zu berücksichtigen. Diese Berücksichtigung der Deformation resultiert in einer deutlich homogeneren, vorzugsweise ähnlichen, insbesondere gleichartigen, Schichtdicke des Druckbilds im zweiten Druckbereich, der während des Deformationsvorgangs deformiert wird, verglichen mit der Schichtdicke im ersten Druckbereich, der während des Deformationsvorgangs nicht oder nur geringförmig deformiert wird.With regard to the intended plastic deformations for the can blank, it is to be assumed that the can blanks, which are typically of sleeve-shaped design with a circular cylindrical cross-section, are drawn in sections at an open end region. In the course of this Einziehvorgangs, which serves in particular to form a mounting interface on the can blank for a spray valve, as it is used when using the can blank as aerosol can, purely by way of example, a diameter reduction of an outer diameter of the can blank in the range of 53 millimeters to about 25 millimeters be provided. This is a considerable compression of the preferably kneadable metal material, in particular the aluminum alloy, as well as the applied paint and ink layers of the can blank connected, which would lead to an increase in the layer thickness for the printed image with a uniform grid width of the printed image. Accordingly, it is provided for the pressure applied to the not yet deformed can blank to consider the, in particular during a Einziehvorgangs provided for the second pressure range, subsequent deformation. This consideration of the deformation results in a much more homogeneous, preferably similar, in particular similar, layer thickness of the printed image in the second printing area, which is deformed during the deformation process, compared with the layer thickness in the first printing area, which is not or only slightly deformed during the deformation process.

Vorzugsweise sind mehrere Druckbereiche vorgesehen, deren Rasterweiten jeweils derart an eine dem Druckvorgang nachfolgende, bereichsweise unterschiedliche plastische Deformation des Dosenrohlings angepasst sind, dass die Rasterweiten der Druckbereiche nach der plastischen Deformation innerhalb des um die erste Rasterweite angeordneten Rasterintervalls liegen.Preferably, a plurality of pressure areas are provided, the screen widths are each adapted to a subsequent printing process, partially different plastic deformation of the can blank that the screen rulings of the pressure areas are after the plastic deformation within the raster arranged around the first grid interval.

Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous developments of the invention are the subject of the dependent claims.

Zweckmäßig ist es, wenn jeder Druckbereich als ringförmig umlaufende, insbesondere einreihige, Anordnung von Einzelpunkten ausgebildet ist und wenn ein Abstand zwischen benachbarten Druckbereichen proportional zu einer Abstandsveränderung ist, die die benachbarten Druckbereiche bei der plastischen Deformation des Hohlkörpers erfahren. Vorzugsweise ist eine Mittelachse des jeweiligen Druckbereichs koaxial zu einer Mittelachse des Dosenrohlings ausgerichtet. Bei einer Aufbringung des Druckbilds auf eine kreiszylindrische Außenoberfläche des Dosenrohlings sind benachbarte Druckbereiche derart angeordnet, dass diese nach der Durchführung der Deformation für den Dosenrohling einen Abstand aufweisen, der einem Abstand des jeweiligen Druckbereichs zu einem jeweiligen weiteren benachbarten Druckbereich entspricht. Alternativ kann vorgesehen sein, dass Mittelachsen der Druckbereiche einen vorgebbaren, insbesondere spitzen, Winkel zur Mittelachse des Dosenrohlings aufweisen und/oder als Wendelabschnitte und somit als offene Ringe ausgebildet sind. auch in diesem Fall liegt ein Abstand zwischen den Einzelpunkten der benachbarten Druckbereiche vor, der so gewählt ist, dass nach einer Deformation des Dosenrohlings die Einzelpunkte einer Vielzahl von benachbart angeordneten Druckabschnitten jeweils zumindest nahezu den gleichen Abstand aufweisen. Eine derartige Gestaltung der Druckbereiche ist insbesondere dann vorzusehen, wenn im Zuge der Deformation des Dosenrohlings eine axiale Verlängerung oder Verkürzung der jeweiligen Druckbereiche eintritt. Somit weisen die vor der Deformation auf den Dosenrohling mit unterschiedlichen Abständen zueinander aufgebrachten Druckbereiche nach der Deformation zumindest im Wesentlichen die gleichen Abstände auf.It is expedient if each pressure region is designed as an annular, in particular single-row, arrangement of individual points and if a distance between adjacent pressure regions is proportional to a change in distance experienced by the adjacent pressure regions during the plastic deformation of the hollow body. Preferably, a central axis of the respective pressure region is aligned coaxially with a central axis of the can blank. In an application of the printed image on a circular cylindrical outer surface of the can blank adjacent pressure areas are arranged such that they have after the implementation of the deformation for the can blank at a distance corresponding to a distance of the respective pressure range to a respective further adjacent pressure range. Alternatively it can be provided that center axes of the pressure areas have a predeterminable, in particular acute, angle to the central axis of the can blank and / or are formed as helical sections and thus as open rings. Also in this case, there is a distance between the individual points of the adjacent pressure areas, which is selected so that after a deformation of the can blank, the individual points of a plurality of adjacently arranged pressure sections each at least have almost the same distance. Such a configuration of the pressure areas is to be provided, in particular, if an axial lengthening or shortening of the respective pressure areas occurs in the course of the deformation of the can blank. Thus, before the deformation on the can blank with different distances from one another applied pressure ranges after deformation at least substantially the same distances.

Bevorzugt ist vorgesehen, dass ein Verhältnis zwischen der Rasterweite des ersten Druckbereichs und der Rasterweite des zweiten Druckbereichs proportional zu einer Durchmesserveränderung ist, die für den zweiten Druckbereich bei der plastischen Deformation des Hohlkörpers vorgesehen ist. Bei dieser Ausführungsform der Druckbereiche wird von einer für die Praxis besonders relevanten Durchmesserreduzierung für den zweiten Druckbereich relativ zum ersten Druckbereich ausgegangen, wie sie typischerweise bei dem Einziehvorgang zur Schaffung einer Montageschnittstelle am Dosenrohling für ein Sprühventil auftritt. Hierbei wird der Dosenrohling zumindest bereichsweise im Hinblick auf seinen Durchmesser verjüngt, so dass für diejenigen Druckbereiche, die innerhalb der Verjüngungszone liegen, eine Verringerung der jeweiligen Rasterweite eintritt. Vorzugsweise sind die Rasterweiten der jeweiligen Druckbereiche derart auf den Verjüngungsvorgang abgestimmt, dass nach Beendigung der Deformation für sämtliche der Druckbereiche zumindest im Wesentlichen die gleiche Rasterweite vorliegt. Beträgt der Durchmesser für den zweiten Druckbereich vor der Durchführung der Deformation beispielhaft das Doppelte des Durchmessers für den zweiten Druckbereich nach der Deformation, so ist die zweite Rasterweite vorzugsweise derart zu wählen, dass diese vor der Deformation ebenfalls doppelt so groß wie nach der Deformation ist.It is preferably provided that a ratio between the raster width of the first pressure range and the raster width of the second pressure range is proportional to a change in diameter that is provided for the second pressure range during the plastic deformation of the hollow body. In this embodiment, the pressure ranges are assumed to be a particularly relevant for the practice diameter reduction for the second pressure range relative to the first pressure range, as typically occurs in the Einziehvorgang to provide a mounting interface on the can blank for a spray valve. Here, the can blank is at least partially tapered with respect to its diameter, so that for those pressure ranges that are within the taper zone, a reduction of the respective grid width occurs. The grid widths of the respective pressure areas are preferably matched to the tapering process in such a way that at least substantially the same grid width is present for all of the pressure areas after the deformation has ended. If, for example, the diameter for the second pressure range before performing the deformation is twice the diameter for the second pressure range after deformation, the second screen width should preferably be selected such that it is also twice as large as after deformation before deformation.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass das Druckbild mit einer Schutzlackierung versehen ist und dass die Trägerlackierung und/oder die Schutzlackierung als lösungsmittelhaltige Lackschicht, vorzugsweise als wasserbasierte Lackschicht, besonders bevorzugt als polare Lackschicht, insbesondere als thermoplastische Lackschicht, ausgebildet sind. Die Aufgabe der Schutzlackierung besteht darin, das Druckbild nach der Beendigung des Druckvorgangs und vor dem Beginn des Deformationsvorgangs möglichst vollständig gegenüber äußeren Einflüssen, insbesondere mechanischen Einflüssen, zu schützen. Insbesondere im Hinblick auf die dem Druckvorgang nachfolgende Deformation des Dosenrohlings, die typischerweise mit Deformationswerkzeugen erfolgt, die an der Außenoberfläche des Dosenrohlings und somit auch am Druckbild angreifen, ist es vorteilhaft, wenn das Druckbild durch die Schutzlackierung geschützt ist. Bei der Schutzlackierung handelt es sich vorzugsweise um einen transparenten Schutzlack. Besonders bevorzugt ist vorgesehen, dass die Schutzlackierung auf der Basis eines lösungsmittelhaltigen Lacks auf den Dosenrohling aufgebracht wird. Dabei kann der lösungsmittelhaltige Lack zumindest anteilig Wasser als Lösungsmittel aufweisen und nach dem Verdampfen des Lösungsmittels eine polare Lackschicht bilden. Hierdurch wird eine Bindung des Schutzlacks an das darunter liegende Druckbild begünstigt, das insbesondere aus polaren, duroplastischen Einzelpunkten gebildet ist. Somit kann auch bei starken Temperaturänderungen, die auf den Dosenrohling einwirken, gewährleistet werden, dass keine Ablösung der Schutzlackierung vom Druckbild erfolgt. Besonders vorteilhaft ist es, wenn die Schutzlackierung eine identische oder zumindest ähnliche Aufbauweise wie eine Trägerlackierung aufweist, die unmittelbar auf die, insbesondere metallische, Außenoberfläche des Hohlkörpers aufgebracht ist und die die Grundlage für das Druckbild bildet. Bei ähnlicher oder identischer Gestaltung der Trägerlackierung und der Schutzlackierung wird das Druckbild zwischen zwei Schichten eingeschlossen, die einen ähnlichen oder identischen thermischen Ausdehnungskoeffizienten aufweisen und ermöglicht damit eine vorteilhafte Dauerfestigkeit für ein Dekor des Hohlkörpers, das durch die Trägerlackierung, das Druckbild und die Schutzlackierung gebildet wird.In a further embodiment of the invention, it is provided that the printed image is provided with a protective coating and that the carrier coating and / or the protective coating are formed as a solvent-containing lacquer layer, preferably as a water-based lacquer layer, particularly preferably as a polar lacquer layer, in particular as a thermoplastic lacquer layer. The object of the protective coating is to protect the printed image after completion of the printing process and before the beginning of the deformation process as completely as possible against external influences, in particular mechanical influences. In particular, with regard to the subsequent printing of the deformation of the can blank, which typically takes place with deformation tools that engage the outer surface of the can blank and thus also on the printed image, it is advantageous if the printed image is protected by the protective coating. The protective coating is preferably a transparent protective lacquer. It is particularly preferred that the protective coating is applied to the can blank on the basis of a solvent-containing paint. In this case, the solvent-containing paint at least partially water as the solvent and after evaporation of the solvent form a polar lacquer layer. As a result, a bond of the protective coating is favored to the underlying printed image, which is formed in particular of polar, thermosetting individual points. Thus, even with strong temperature changes, which act on the can blank, be ensured that no detachment of the protective coating from the printed image. It when the protective coating has an identical or at least similar structure as a carrier coating, which is applied directly to the, in particular metallic, outer surface of the hollow body and which forms the basis for the printed image is particularly advantageous. At similar or identical design of the carrier coating and the protective coating, the printed image is enclosed between two layers, which have a similar or identical coefficient of thermal expansion and thus enables an advantageous fatigue strength for a decor of the hollow body, which is formed by the carrier coating, the printed image and the protective coating.

Bei einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass das die Einzelpunkte des Druckbilds als duroplastische Druckfarbenpunkte ausgebildet sind. Dies ermöglicht einen Auftrag des Druckbilds mit einem Tintenstrahldruckverfahren, bei dem ein Tintenstrahldruckkopf eine Vielzahl von einzelnen Farbtröpfchen auf die Außenoberfläche des Hohlkörpers abgibt. Die aufgetragenen Farbtröpfchen werden durch energetische Aktivierung, insbesondere durch Bestrahlung mit ultraviolettem Licht, ausgehärtet. Dabei wird durch die Verwendung einer duroplastischen Druckfarbe und eine rasche Aushärtung der Farbtröpfchen nach dem Auftreffen auf die Außenoberfläche des Dosenrohlings eine definierte Geometrie für jedes der Farbtröpfchen gewährleistet, so dass das Druckbild hohe Anforderungen im Hinblick auf optische Auflösung und Schärfe erfüllen kann. Typischerweise weisen die Polymerketten der duroplastischen Druckfarbe polare Eigenschaften auf, so dass bei einer Verwendung einer polaren Schutzlackierung und/oder einer polaren Trägerlackierung eine vorteilhafte chemische Bindung zwischen dem Druckbild und den Lackschichten erzielt werden kann.In an advantageous embodiment of the invention, it is provided that the individual points of the printed image are formed as duroplastic printing ink dots. This allows application of the print image with an ink jet printing process in which an ink jet print head emits a plurality of individual paint droplets onto the outer surface of the hollow body. The applied paint droplets are cured by energetic activation, in particular by irradiation with ultraviolet light. In this case, the use of a thermosetting printing ink and a rapid curing of the ink droplets after striking the outer surface of the can blank ensures a defined geometry for each of the color droplets, so that the printed image can meet high requirements in terms of optical resolution and sharpness. Typically, the polymer chains of the thermosetting printing ink have polar properties, so that when using a polar protective coating and / or a polar carrier coating, a favorable chemical bond between the printed image and the coating layers can be achieved.

Die Aufgabe der Erfindung wird für ein Bearbeitungsverfahren für einen Hohlkörper gelöst, wie es im Anspruch 6 angegeben ist. Hierbei umfasst das Bearbeitungsverfahren die folgenden Schritte: Bereitstellen eines Hohlkörpers an eine Lackiereinrichtung und Aufbringen einer Trägerlackierung auf eine Außenoberfläche des Hohlkörpers, Bereitstellen des lackierten Hohlkörpers an eine Druckeinrichtung und Bedrucken des Hohlkörpers mit einem Druckbild, das aus einer Vielzahl von Einzelpunkten gebildet wird, die jeweils in einer vorgebbaren Rasterweite voneinander beabstandet sind, wobei ein erster Druckbereich auf der Außenoberfläche des Hohlkörpers mit einer ersten Rasterweite und ein zweiter Druckbereich auf der Außenoberfläche des Hohlkörpers mit einer zweiten Rasterweite bedruckt wird, die von der ersten Rasterweite verschieden ist und wobei die zweite Rasterweite außerhalb eines Rasterintervalls liegt, das die Rasterweite des ersten Druckbereichs umgibt und wobei die zweite Rasterweite derart an eine dem Druckvorgang nachfolgende, bereichsweise plastische Deformation des Hohlkörpers angepasst ist, dass die zweite Rasterweite nach der plastischen Deformation des zweiten Druckbereichs innerhalb des Rasterintervalls um die erste Rasterweite liegt.The object of the invention is achieved for a processing method for a hollow body, as indicated in claim 6. In this case, the processing method comprises the following steps: providing a hollow body to a painting device and applying a carrier coating on an outer surface of the hollow body, providing the coated hollow body to a printing device and printing the hollow body with a printed image, which is formed from a plurality of individual points, which are each spaced apart in a predetermined grid spacing, wherein a first pressure range on the Outer surface of the hollow body is printed with a first screen pitch and a second printing area on the outer surface of the hollow body with a second screen pitch, which is different from the first screen pitch and wherein the second screen pitch lies outside a screen interval, which surrounds the screen width of the first printing area and wherein the second raster width is adapted to a subsequent printing, the region-wise plastic deformation of the hollow body such that the second raster width after the plastic deformation of the second printing area within the raster interval to the e rst grid width is.

Bevorzugt erfolgt die Erzeugung des Druckbilds in einem Umfangsdruckverfahren, bei dem die Einzelpunkte durch eine rotatorische Relativbewegung zwischen einem Druckkopf und dem Dosenrohling, die um eine Längsachse des Dosenrohlings erfolgt, aufgebracht werden. Eine Variation der Rasterweite kann beispielsweise durch eine Einflussnahme auf die Winkelgeschwindigkeit zwischen Druckkopf und Dosenrohling erfolgen. Ergänzend oder alternativ kann eine Einflussnahme auf eine Tröpfchenabgaberate, also eine Anzahl von Tröpfchen pro Zeiteinheit, für die vom Druckkopf bereitgestellten Tröpfchen vorgesehen werden.The production of the printed image preferably takes place in a circumferential printing process, in which the individual dots are applied by a rotational relative movement between a printing head and the can blank, which takes place about a longitudinal axis of the can blank. A variation of the screen width can be done for example by influencing the angular velocity between the print head and can blank. Additionally or alternatively, an influence on a droplet release rate, ie a number of droplets per unit of time, can be provided for the droplets provided by the print head.

In weiterer Ausgestaltung des Verfahrens ist vorgesehen, dass das Druckbild mit mehreren Druckbereichen auf die Außenoberfläche des Hohlkörpers aufgebracht wird, wobei die Rasterweiten der Druckbereiche jeweils derart an eine dem Druckvorgang nachfolgende, bereichsweise plastische Deformation des Hohlkörpers angepasst werden, dass die Rasterweiten der Druckbereiche nach der plastischen Deformation innerhalb des Rasterintervalls um die erste Rasterweite liegen.In a further embodiment of the method it is provided that the printed image with a plurality of pressure areas on the outer surface is applied to the hollow body, wherein the screen widths of the printing areas are each adapted to a subsequent printing process, regional plastic deformation of the hollow body, that the screen rulings of the printing areas after the plastic deformation within the raster interval are the first grid.

Vorteilhaft ist es, wenn das Druckbild, insbesondere in einem Tintenstrahldruckverfahren, derart aufgebracht wird, dass ein Abstand zwischen benachbarten Druckbereichen proportional zu einer Abstandsveränderung ist, die die benachbarten Druckbereiche bei der plastischen Deformation des Hohlkörpers erfahren.It is advantageous if the printed image, in particular in an ink-jet printing process, is applied in such a way that a distance between adjacent print areas is proportional to a change in distance experienced by the adjacent print areas during the plastic deformation of the hollow body.

Bevorzugt ist vorgesehen, dass das Druckbild, insbesondere in einem Tintenstrahldruckverfahren, derart aufgebracht wird, dass ein Verhältnis zwischen der Rasterweite des ersten Druckbereichs und der Rasterweite des zweiten Druckbereichs proportional zu einer Durchmesserveränderung ist, die für den zweiten Druckbereich bei der plastischen Deformation des Hohlkörpers vorgesehen ist.It is preferably provided that the printed image, in particular in an ink jet printing process, is applied such that a ratio between the raster width of the first printing area and the raster width of the second printing area is proportional to a change in diameter provided for the second printing area in the plastic deformation of the hollow body is.

Zweckmäßig ist es, wenn nach dem Bedrucken des Hohlkörpers mit dem Druckbild eine Schutzlackierung der mit dem Druckbild versehenen Außenoberfläche des Hohlkörpers vorgenommen wird.It is expedient if after the printing of the hollow body with the printed image a protective coating of the provided with the printed image outer surface of the hollow body is made.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass die Trägerlackierung und/oder die Schutzlackierung mit einem lösungsmittelhaltigen Lack, vorzugsweise mit einem wasserbasierten Lack, besonders bevorzugt mit einem polaren Lack, insbesondere mit einem thermoplastischen Lack, erfolgt.In a further embodiment of the invention, it is provided that the carrier coating and / or the protective coating with a solvent-containing paint, preferably with a water-based paint, more preferably with a polar paint, in particular with a thermoplastic paint done.

Bevorzugt ist vorgesehen, dass das Druckbild mit einem Tintenstrahldruckverfahren, vorzugsweise mit einem frei programmierbaren Tintenstrahldrucker, besonders bevorzugt während einer frei einstellbaren Drehbewegung des Hohlkörpers um eine Mittelachse, insbesondere unter Verwendung einer duroplastischen Druckfarbe, auf die Außenoberfläche des Hohlkörpers aufgebracht wird. Exemplarisch ist vorgesehen, dass der Tintenstrahldrucker wenigstens einen Druckkopf mit einer linienförmigen Anordnung von Druckdüsen umfasst, wobei die Druckdüsen vorzugsweise parallel zur Mittelachse des Dosenrohlings aneinander gereiht und ausgerichtet sind. Ein Abstand der Druckdüsen zueinander bestimmt einen Abstand ringförmig ausgebildeter Druckbereiche, sofern keine lineare Relativbewegung des Druckkopfs parallel zur Mittelachse des Dosenrohlings während der Durchführung des Druckvorgangs vorgesehen ist. Die Druckdüsen werden von einer Steuereinheit angesteuert, die insbesondere eine Abgaberate (Anzahl der Tröpfchen pro Zeiteinheit) für die aus den Druckdüsen ausgetragenen Tintentröpfchen, insbesondere individuell für jede der Druckdüsen, beeinflussen kann. Ferner kann vorgesehen sein, dass die Steuereinheit auch eine Rotationsgeschwindigkeit des Dosenrohlings um seine Mittelachse beeinflussen kann. Mit Hilfe dieser Maßnahmen kann für jeden Druckbereich eine individuelle Festlegung der Rasterweite vorgenommen werden. Durch eine geeignete Ansteuerung der Druckdüsen bei gleichförmiger Rotationsgeschwindigkeit für den Dosenrohling kann eine zeitgleiche Bedruckung mehrerer Druckbereiche mit unterschiedlicher Rasterweite vorgenommen werden, wobei die Druckbereiche jeweils eine oder mehrere Reihen von umlaufend auf dem Dosenrohling aufzubringenden Einzelpunkten umfassen und wobei Abstände zwischen den Reihen von Einzelpunkten der Teilung der Druckdüsen entsprechen. Ergänzend kann vorgesehen werden, den Druckkopf während des Druckvorgangs linear zu verfahren, um damit eine Reduzierung der Abstände zwischen den Reihen von Einzelpunkten zu erzielen.It is preferably provided that the printed image with an ink jet printing process, preferably with a freely programmable Ink jet printer, particularly preferably during a freely adjustable rotational movement of the hollow body about a central axis, in particular using a thermosetting printing ink, is applied to the outer surface of the hollow body. By way of example, it is provided that the inkjet printer comprises at least one print head with a line-shaped arrangement of printing nozzles, wherein the printing nozzles are preferably lined up and aligned parallel to the central axis of the can blank. A distance between the printing nozzles to each other determines a distance annular formed pressure ranges, provided that no linear relative movement of the print head is provided parallel to the central axis of the can blank during the execution of the printing operation. The pressure nozzles are controlled by a control unit, which in particular can influence a dispensing rate (number of droplets per unit of time) for the ink droplets discharged from the printing nozzles, in particular individually for each of the printing nozzles. Furthermore, it can be provided that the control unit can also influence a rotational speed of the can blank about its central axis. With the help of these measures, an individual determination of the screen ruling can be made for each pressure range. By a suitable control of the printing nozzles at a uniform rotational speed for the can blank, a simultaneous printing of multiple pressure areas with different screen width can be made, wherein the pressure areas each comprise one or more rows of circumferentially applied to the can blank individual points and wherein distances between the rows of individual points of division correspond to the pressure nozzles. In addition, it can be provided to move the print head linearly during the printing process, in order to achieve a reduction in the distances between the rows of individual points.

Vorteilhaft ist es, wenn der Hohlkörper nach der Aufbringung des Druckbilds und der Schutzlackierung an einem offenen Endbereich mit einer Einziehmaschine plastisch deformiert wird und hierbei eine Veränderung der Rasterweite des zweiten Druckbereichs erfolgt.It is advantageous if the hollow body is plastically deformed after application of the printed image and the protective coating at an open end region with a Einziehmaschine and in this case there is a change in the screen width of the second printing area.

Eine vorteilhafte Ausführungsform der Erfindung ist in der Zeichnung dargestellt. Dabei zeigt:

Figur 1
eine schematische Darstellung eines mit einem Druckbild versehenen und eingezogenen Dosenrohlings mit einer Ausschnittvergrößerung des Druckbilds, das sich bis zu einem offenen Ende des Dosenrohlings erstreckt,
Figur 2
eine schematische Darstellung des noch nicht deformierten Dosenrohlings gemäß der Figur 1 mit einer Ausschnittvergrößerung des Druckbilds, das sich bis zu einem offenen Ende des Dosenrohlings erstreckt,
Figur 3
eine schematische Ausschnittvergrößerung für das Druckbild gemäß der Figur 2 in einer ersten Ausführungsform, und
Figur 4
eine schematische Ausschnittvergrößerung für das Druckbild gemäß der Figur 2 in einer zweiten Ausführungsform.
An advantageous embodiment of the invention is shown in the drawing. Showing:
FIG. 1
a schematic representation of a provided with a printed image and retracted can blank with a cut-out enlargement of the printed image, which extends to an open end of the can blank,
FIG. 2
a schematic representation of the not yet deformed can blank according to the FIG. 1 with a cut-out enlargement of the printed image, which extends to an open end of the can blank,
FIG. 3
a schematic detail enlargement for the printed image according to the FIG. 2 in a first embodiment, and
FIG. 4
a schematic detail enlargement for the printed image according to the FIG. 2 in a second embodiment.

Ein in der Figur 1 dargestellter, deformierter Dosenrohling 1 ist als Aerosoldosenrohling ausgebildet und zur Befüllung mit einer Flüssigkeit, beispielsweise einem Parfum oder Deodorant, und einem Druckgas, beispielsweise Propan oder Butan, vorgesehen. Der Dosenrohling 1 gemäß der Figur 1 wird in nicht näher dargestellter Weise mittels einer nicht dargestellten Einziehmaschine in einer Vielzahl von Bearbeitungsschritten mit geeigneten Deformationswerkzeugen aus dem in den Figuren 2 bis 4 dargestellten undeformierten Dosenrohling 1 hergestellt. Der undeformierte Dosenrohling 1 ist vorzugweise als einseitig offene, kreiszylindrische Hülse ausgebildet und weist dementsprechend eine kreiszylindermantelförmige Außenoberfläche 2 auf. Vorzugsweise ist der Dosenrohling 1 aus einer Aluminiumlegierung hergestellt und wird zunächst mit einer nicht näher dargestellten Trägerlackierung versehen, auf die anschließend eine in den Ausschnittvergrößerungen gemäß den Figuren 1 bis 4 jeweils nur rein schematisch dargestelltes Druckbild, insbesondere in einem Tintenstrahldruckverfahren, aufgebracht wird.An Indian FIG. 1 illustrated, deformed can blank 1 is designed as aerosol can blank and for filling with a liquid, such as a perfume or deodorant, and a compressed gas, such as propane or butane, provided. The can blank 1 according to the FIG. 1 is in a manner not shown by means of a non-illustrated Einziehmaschine in a variety of processing steps with suitable deformation tools from the in the FIGS. 2 to 4 shown undeformed can blank 1 produced. The undeformed can blank 1 is preferably designed as a one-sided, circular cylindrical sleeve and accordingly has a circular cylindrical jacket-shaped outer surface 2. Preferably, the can blank 1 is made of an aluminum alloy and is first provided with a carrier paint, not shown, then to the one in the neckline enlargements according to the FIGS. 1 to 4 in each case only a purely schematically represented printed image, in particular in an ink-jet printing process, is applied.

Vorzugsweise ist für die Aufbringung des Druckbilds vorgesehen, dass der Dosenrohling 1 um eine Mittelachse 3 rotiert wird und ein gegenüberliegend zur Außenoberfläche 2 angeordneter, nicht dargestellter Druckkopf, der gegebenenfalls längs der Mittelachse 3 linearbeweglich verschoben werden kann, in vorgebbarer Weise zur Abgabe von Einzeltropfen auf die Außenoberfläche 2 ausgebildet ist. Rein schematisch ist das Druckbild an einem oberen Endbereich 4 des Dosenrohlings 1 in fünf Druckbereiche 5 bis 8 unterteilt, wobei in jedem der Druckbereiche 5 bis 8 eine unterschiedliche Rasterweite für die Einzeltropfen, also ein Abstand zwischen benachbarten Einzeltropfen, vorgesehen ist. Dies wird in der Figur 2 rein schematisch und nicht maßstäblich durch die unterschiedliche grafische Füllung der einzelnen Druckbereiche 5 bis 8 repräsentiert, die keinen Rückschlüsse auf eine tatsächliche Größe und Rasterweite für die Einzelpunkte ermöglicht.Preferably, it is provided for the application of the printed image that the can blank 1 is rotated about a central axis 3 and an opposite to the outer surface 2 arranged, not shown printhead, which may optionally be moved linearly movable along the central axis 3, in a predeterminable manner for dispensing individual drops the outer surface 2 is formed. Purely schematically, the printed image at an upper end portion 4 of the can blank 1 is divided into five pressure ranges 5 to 8, wherein in each of the pressure ranges 5 to 8, a different screen width for the individual drops, so a distance between adjacent individual drops is provided. This is in the FIG. 2 represented purely schematically and not to scale by the different graphical filling of the individual pressure ranges 5 to 8, which does not allow conclusions about an actual size and screen ruling for the individual points.

Wie aus der Figur 1 entnommen werden kann, wird jeder der einzelnen Druckbereiche 6 bis 8 im Zuge der Deformation des Dosenrohlings 1 in unterschiedlicher Weise deformiert wohingegen der Druckbereich 5 nicht deformiert wird. Rein exemplarisch ist vorgesehen, dass die Druckbereiche 7 und 8 stärker umgeformt werden als der Druckbereich 6, dementsprechend weisen die Druckbereiche 7 und 8 andere Rasterweiten als die Druckbereiche 5 und 6 auf. Rein exemplarisch ist vorgesehen, dass die Rasterweiten der jeweiligen Druckbereiche 6 bis 8 derart auf die jeweilige Umformung des entsprechenden Druckbereichs 6 bis 8 angepasst sind, dass nach der Durchführung des Einziehvorgangs und der damit verbundenen Durchmesserveränderung für die einzelnen Druckbereiche 6 bis 8 in allen Druckbereichen 6 bis 8 zumindest nahezu die gleiche Rasterweite für die Einzelpunkte vorliegt, wie dies schematisch in der Figur 1 dargestellt ist. Besonders bevorzugt ist vorgesehen, dass die Rasterweite für die Einzelpunkte in den Druckbereichen 6 bis 8 mit der Rasterweite der Einzelpunkte in Druckbereich 5, der während der Deformation des Dosenrohlings 1 keine geometrische Veränderung erfährt, übereinstimmen.Like from the FIG. 1 can be taken, each of the individual pressure ranges 6 to 8 in the course of deformation of the Can blanks 1 deformed in different ways whereas the pressure area 5 is not deformed. By way of example only, it is provided that the pressure regions 7 and 8 are formed to a greater extent than the pressure region 6; accordingly, the pressure regions 7 and 8 have different screen rulings than the pressure regions 5 and 6. By way of example, it is provided that the grid widths of the respective pressure areas 6 to 8 are adapted to the respective deformation of the corresponding pressure range 6 to 8, that after performing the Einziehvorgangs and the associated change in diameter for the individual pressure ranges 6 to 8 in all pressure ranges. 6 to 8 at least almost the same screen ruling for the individual points is present, as shown schematically in the FIG. 1 is shown. It is particularly preferred that the grid width for the individual points in the pressure ranges 6 to 8 with the grid width of the individual points in the printing area 5, which undergoes no geometric change during the deformation of the can blank 1, match.

Wie aus der Figur 3 rein exemplarisch entnommen werden kann, ist eine Variation eines Abstands 24, 25 zwischen den Einzelpunkten 21 ausschließlich in Umfangsrichtung (X-Richtung) vorgesehen. Somit weist das aus den Einzelpunkten 21 gebildete, nicht näher dargestellte Druckbild nach der Durchführung des zumindest im Wesentlichen, insbesondere ausschließlich, auf eine Durchmesserreduzierung gerichteten Deformationsvorgangs, die in der Figur 1 rein schematisch dargestellte gleichmäßige Rasterweite in der Umfangsrichtung auf. Eine axiale Längenänderung ist in diesem Fall nicht vorgesehen, so dass auch ein Abstand 26 zwischen benachbarten Einzelpunktreihen, von denen in der Figur 3 aus Gründen der Übersichtlichkeit lediglich die Einzelpunktreihen 22 und 23 bezeichnet sind, durch die Deformation nicht verändert wird und somit auch bei der Aufbringung des Druckbilds auf den Dosenrohling 1 nicht berücksichtigt werden muss. Bei der Figur 3 bildet jede der Einzelpunktreihen 23, 23 innerhalb des Druckbereichs 6 einen nicht näher bezeichneten Druckbereich, da der Abstand 24, 25 in einer Umfangsrichtung (X-Richtung) quer zur Mittelachse 3 zwischen den Einzelpunkten 21 in jeder der Einzelpunktreihen 22, 23 unterschiedlich zur jeweils benachbarten Einzelpunktreihe 22, 23 ist.Like from the FIG. 3 purely by way of example, a variation of a distance 24, 25 between the individual points 21 is provided exclusively in the circumferential direction (X direction). Thus, the pressure image formed from the individual points 21, not shown in more detail after the execution of the at least substantially, in particular exclusively, directed to a diameter reduction deformation process, in the FIG. 1 purely schematically illustrated uniform grid width in the circumferential direction. An axial length change is not provided in this case, so that a distance 26 between adjacent rows of individual points, of which in the FIG. 3 for reasons of clarity, only the individual rows of points 22 and 23 are designated, is not changed by the deformation and thus even when applying the printed image on the can blank 1 need not be considered. In the FIG. 3 forms each of the individual rows of points 23, 23 within the printing area 6 an unspecified pressure range, since the distance 24, 25 in a circumferential direction (X direction) transverse to the central axis 3 between the individual points 21 in each of the individual rows of lines 22, 23 different from the respectively adjacent Single point series 22, 23 is.

Abweichend hiervon ist bei der Darstellung gemäß der Figur 4 sowohl in der Umfangsrichtung (X-Richtung) quer zur Mittelachse 3 als auch in einer Axialrichtung (Y-Richtung) parallel zur Mittelachse 3 eine Veränderung der jeweiligen Abstände 42, 43, 44, 45 zwischen den Einzelpunkten 41 vorgesehen. Eine derartige Anordnung der Einzelpunkte 41 wird insbesondere dann gewählt, wenn im Zuge einer Deformation des Dosenrohlings 1 eine kombinierte Durchmesserreduzierung und Längenveränderung für den jeweiligen Druckbereich erfolgt.Deviating from this, in the illustration according to the FIG. 4 both in the circumferential direction (X-direction) transverse to the central axis 3 and in an axial direction (Y-direction) parallel to the central axis 3, a change of the respective distances 42, 43, 44, 45 between the individual points 41 is provided. Such an arrangement of the individual points 41 is selected, in particular, if, in the course of a deformation of the can blank 1, a combined reduction in diameter and change in length take place for the respective pressure range.

Für den Fall einer ausschließlichen Längenveränderung kann auch vorgesehen sein, die Einzelpunkte in nicht dargestellter Weise lediglich in der Axialrichtung hinsichtlich ihres Abstands an die Deformation anzupassen, während in der Umfangsrichtung keine Abstandsanpassung erforderlich ist.In the case of an exclusive change in length can also be provided to adjust the individual points in a manner not shown only in the axial direction with respect to their distance from the deformation, while in the circumferential direction no adjustment of distance is required.

Rein exemplarisch ist für die Herstellung des in der Figur 1 dargestellten Dosenrohling 1 die folgende Vorgehensweise vorgesehen:
In einem ersten Schritt erfolgt in nicht näher dargestellter Weise ein Auftrag einer Trägerlackierung auf den ebenfalls nicht näher dargestellten Hohlkörper, bei dem es sich insbesondere um einen metallischen Hohlkörper aus einer Aluminiumlegierung handelt.Purely exemplary is for the production of in the FIG. 1 shown can blank 1, the following procedure provided:
In a first step, in a manner not shown, an application of a carrier coating on the hollow body, also not shown in detail, which is in particular a metallic hollow body made of an aluminum alloy.

In einem weiteren Schritt erfolgt der Auftrag des Druckbilds im Rahmen eines nicht näher dargestellten Tintenstrahldruckvorgangs, wobei der hierzu eingesetzte, ebenfalls nicht dargestellte Tintenstrahldruckkopf die Einzelpunkte in den jeweiligen Druckbereichen entsprechend der später vorgesehenen Deformation der jeweiligen Druckbereiche auf die Außenoberfläche 2 des Dosenrohlings 1 aufbringt.In a further step, the application of the printed image in the context of an ink jet printing process, not shown, wherein the used for this purpose, also not shown ink jet print head applying the individual points in the respective pressure ranges according to the later provided deformation of the respective pressure ranges on the outer surface 2 of the can blank 1.

In einem darauf folgenden Schritt erfolgt die Aufbringung einer Schutzlackierung auf die Außenoberfläche 2 des Dosenrohlings 1, wobei die Schutzlackierung insbesondere als Schutzschicht gegenüber mechanischen Belastungen für das Druckbild dient, wie sie bei der nachfolgenden Deformation des Dosenrohlings 1 auftreten können.In a subsequent step, the application of a protective coating on the outer surface 2 of the can blank 1, wherein the protective coating is used in particular as a protective layer against mechanical stress on the printed image, as they may occur in the subsequent deformation of the can blank 1.

Anschließend wird der Dosenrohling 1 mit einer nicht näher dargestellten Einziehmaschine ausgehend von der in den Figuren 2 bis 4 dargestellten kreiszylindrischen Geometrie in die rotationssymmetrische, rein exemplarisch mit Durchmessersprüngen versehene Geometrie gemäß der Figur 1 umgeformt, wobei insbesondere oberhalb des Druckbereich 8 eine mechanische Schnittstelle für ein nicht näher dargestelltes Ventil gebildet wird, das auf den Dosenrohling 1 nach Befüllung aufgesetzt wird.Subsequently, the can blank 1 with a Einziehmaschine not shown starting from the in the FIGS. 2 to 4 shown circular cylindrical geometry in the rotationally symmetrical, provided purely by way of example with diameter jumps geometry according to the FIG. 1 deformed, in particular above the pressure range 8, a mechanical interface for a valve not shown in detail is formed, which is placed on the can blank 1 after filling.

Die Zielsetzung des Druckverfahrens zur Aufbringung des Druckbilds liegt darin, die Rasterweite für die Einzelpunkte derart zu wählen, dass sich nach Durchführung der Deformation für den Dosenrohling 1 eine möglichst gleichförmige, insbesondere identische, Rasterweite für sämtliche Einzelpunkte ergibt. Hierdurch wird einerseits eine vorteilhafte optische Anmutung für den fertig gestellten Dosenrohling 1 gewährleistet. Andererseits wird durch diese Maßnahmen auch eine unerwünschte Schichtdickenveränderung für die auf den Hohlkörper aufgebrachte Beschichtung, die die Trägerlackierung, das Druckbild und die Schutzlackierung umfasst, zumindest weitgehend reduziert bzw. verhindert.The objective of the printing process for applying the printed image is to select the screen width for the individual points such that, after the deformation has been carried out for the can blank 1, a uniform, in particular identical, screen ruling for all individual points results. As a result, on the one hand, a favorable optical appearance for the finished can blank 1 is ensured. On the other hand, these measures also an undesirable Layer thickness change for the applied to the hollow body coating, which comprises the carrier coating, the printed image and the protective coating, at least largely reduced or prevented.

Claims (13)

  1. Can blank with a hollow body, which is provided on an outer surface (2) with a base coating, on which is applied a printed image, in particular by an inkjet printing process, wherein the printed image is formed by a multiplicity of individual dots (21; 41), each spaced apart from one another in a presettable screen ruling (24, 25, 26; 42, 43, 44, 45), wherein a first print area (5) of the printed image has a first screen ruling (24, 25, 26; 42, 43, 44, 45) and a second print area (6, 7, 8) of the printed image has a second screen ruling (24, 25, 26; 42, 43, 44, 45) which differs from the first screen ruling (24, 25, 26; 42, 43, 44, 45), characterised in that the second screen ruling (24, 25, 26; 42, 43, 44, 45) lies outside a screen interval which is arranged around the screen ruling (24, 25, 26; 42, 43, 44, 45) of the first print area (5) and that the second screen ruling (24, 25, 26; 42, 43, 44, 45) is so adapted to a plastic deformation of the hollow body in certain areas following the printing process that the second screen ruling (24, 25, 26; 42, 43, 44, 45), after the plastic deformation of the second print area (6, 7, 8), lies within the screen interval around the first screen ruling (24, 25, 26; 42, 43, 44, 45).
  2. Can blank according to claim 1 or 2, characterised in that each print area (5, 6, 7, 8) is in the form of an annular, continuous, in particular single-row arrangement of individual dots (21; 41), and that a distance (26; 44, 45) between adjacent print areas (5, 6, 7, 8) is proportional to a change in distance which the adjacent print areas (5, 6, 7, 8) undergo during plastic deformation of the hollow body.
  3. Can blank according to any of the preceding claims, characterised in that a ratio between the screen ruling (24, 25; 42, 43) of the first print area (5) and the screen ruling (24, 25; 42, 43) of the second print area (6, 7, 8) is proportional to a change in diameter which is provided for the second print area (6, 7, 8) during plastic deformation of the hollow body.
  4. Can blank according to any of the preceding claims, characterised in that the printed image is provided with a protective coating and that the base coating and/or the protective coating are in the form of a solvent-containing coating layer, preferably a water-based coating layer, especially preferably a polar coating layer, in particular a thermoplastic coating layer.
  5. Can blank according to any of the preceding claims, characterised in that the individual dots (21; 41) of the printed image are in the form of duroplastic printing ink dots.
  6. Processing method for a hollow body with the steps: provision of a hollow body to a coating unit and application of a base coating to an outer surface (2) of the hollow body, provision of the coated hollow body to a printing unit and printing of the hollow body with a printed image which is formed by a multiplicity of individual dots (21; 41), each spaced apart from one another in a presettable screen ruling (24, 25, 26; 42, 43, 44, 45), wherein a first print area (5) on the outer surface (2) of the hollow body is printed with a first screen ruling (24, 25, 26; 42, 43, 44, 45) and a second print area (6, 7, 8) on the outer surface (2) of the hollow body is printed with a second screen ruling (24, 25, 26; 42, 43, 44, 45) which differs from the first screen ruling (24, 25, 26; 42, 43, 44, 45), characterised in that the second screen ruling (24, 25, 26; 42, 43, 44, 45) lies outside a screen interval which encompasses the screen ruling (24, 25, 26; 42, 43, 44, 45) of the first print area (5) and that the second screen ruling (24, 25, 26; 42, 43, 44, 45) is so adapted to a plastic deformation of the hollow body in certain areas following the printing process that the second screen ruling (24, 25, 26; 42, 43, 44, 45), after the plastic deformation of the second print area (6, 7, 8), lies within the screen interval around the first screen ruling (24, 25, 26; 42, 43, 44, 45).
  7. Processing method according to claim 6, characterised in that the printed image with several print areas (5, 6, 7, 8) is applied to the outer surface (2) of the hollow body, wherein the screen rulings (24, 25, 26; 42, 43, 44, 45) of the print areas (5, 6, 7, 8) are in each case so adapted to a plastic deformation of the hollow body in certain areas following the printing process that the the screen rulings (24, 25, 26; 42, 43, 44, 45) of the print areas (5, 6, 7, 8), after the plastic deformation, lie within the screen interval around the first screen ruling (24, 25, 26; 42, 43, 44, 45).
  8. Processing method according to claim 6 or 7, characterised in that the printed image is so applied, in particular in an inkjet printing process, that a distance (26; 44, 45) between adjacent print areas (5, 6, 7, 8) is proportional to a change in distance which the adjacent print areas (5, 6, 7, 8) undergo during plastic deformation of the hollow body.
  9. Processing method according to claim 6, 7 or 8, characterised in that the printed image is so applied, in particular in an inkjet printing process, that a ratio between the screen ruling (24, 25, 26; 42, 43, 44, 45) of the first print area (5) and the screen ruling (24, 25, 26; 42, 43, 44, 45) of the second print area (6, 7, 8) is proportional to a change in diameter which is provided for the second print area (6, 7, 8) during plastic deformation of the hollow body.
  10. Processing method according to any of claims 6 to 9, characterised in that, after printing of the hollow body with the printed image, a protective coating of the outer surface (2) of the hollow body provided with the printed image is applied.
  11. Processing method according to claim 10, characterised in that the base coating and/or the protective coating are in the form of a solvent-containing coating layer, preferably a water-based coating layer, especially preferably a polar coating layer, in particular a thermoplastic coating layer.
  12. Processing method according to any of claims 6 to 11, characterised in that the printed image is applied to the outer surface (2) of the hollow body by an inkjet printing process, preferably with a freely programmable inkjet printer, especially preferably during a freely adjustable rotary movement of the hollow body around a centre axis (3), in particular using a duroplastic printing ink.
  13. Processing method according to any of claims 6 to 12, characterised in that the hollow body, after application of the printed image and the protective coating, is plastically deformed at an open end section by a pull-in device, which in so doing effects a change in the screen ruling (24, 25, 26; 42, 43, 44, 45) of the second print area (6, 7, 8).
EP17151845.9A 2017-01-17 2017-01-17 Can blank and processing method for a cavity Active EP3348410B1 (en)

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JPH0741735B2 (en) * 1989-09-12 1995-05-10 東洋製罐株式会社 Manufacturing method of pre-printed compact
EP2500177A3 (en) * 2011-03-14 2014-03-19 Seiko Epson Corporation Printed layer formation processing device and printed layer formation processing method
ES2768283T3 (en) 2013-10-09 2020-06-22 Hinterkopf Gmbh Printing equipment, printing machine and procedure for the operation of a printing equipment

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