EP3044007A1 - Procédé d'impression de surfaces d'objets en trois dimensions et objet en trois dimensions pourvu d'une impression - Google Patents

Procédé d'impression de surfaces d'objets en trois dimensions et objet en trois dimensions pourvu d'une impression

Info

Publication number
EP3044007A1
EP3044007A1 EP14765956.9A EP14765956A EP3044007A1 EP 3044007 A1 EP3044007 A1 EP 3044007A1 EP 14765956 A EP14765956 A EP 14765956A EP 3044007 A1 EP3044007 A1 EP 3044007A1
Authority
EP
European Patent Office
Prior art keywords
color layer
layer
coating
printed
primer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14765956.9A
Other languages
German (de)
English (en)
Other versions
EP3044007B1 (fr
Inventor
Volker Till
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.)
Dekron GmbH
Original Assignee
Till GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Till GmbH filed Critical Till GmbH
Publication of EP3044007A1 publication Critical patent/EP3044007A1/fr
Application granted granted Critical
Publication of EP3044007B1 publication Critical patent/EP3044007B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after 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
    • B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B65D1/165—Cylindrical cans

Definitions

  • the invention relates to a method for printing surfaces of three-dimensional objects, in particular with cylindrical or curved surfaces such as bottles or cans, by means of inkjet printheads, ie in a digital printing process, in which the three-dimensional object a preferably white or otherwise colored, in particular opaque, base color layer and a further color layer is printed thereon.
  • the further color layer can consist of one or more colors, which are printed in a print layer with an inkjet print head or in multiple print layers with a plurality of inkjet print heads of different colors as a mixed color and possibly give a preferably textured image.
  • the application of the coating can in particular be effected by printing, for example with a digital printing inkjet print head.
  • basically known coating methods can be used for the coating, for example a spray coating.
  • a correspondingly printed three-dimensional object in particular a container such as a bottle or a can, will be described.
  • Printing machines are known which print on curved surfaces with drop-on-demand ink jet print heads. As a rule, colors are printed as cyan (C), magenta (M) and yellow (Y) with black (K) successively on the object with the curved surface moved relative to the inkjet printheads and produce the color impression on this surface colored print image.
  • a base color layer is usually printed first, which is often white, to produce a better opacity. Basically, however, other colors can be used for this, which can in principle also make the printed image of the color layer graphically.
  • the US 8,522,989 B2 describes a digital printing of three-dimensional bodies with a particular curved surface, in which a base layer is at least partially applied to the three-dimensional body.
  • This base layer can be transparent or opaque.
  • further elements, such as labels can be printed for graphic design. This creates a three-dimensional effect that causes the label to protrude from the base layer.
  • an inverse printing is described, are released in the specially shaped recesses in the printing of the base layer. This achieves an effect in which the elements created by the absence of the base layer in the released areas appear to be reset relative to the base layer.
  • the base layer which differs in color and / or by its thickness / brightness from the three-dimensional body in particular, is used specifically for contrasting design elements according to the teaching of US Pat. No. 8,522,989 B2.
  • the edges of the base layer or of the print job should specifically achieve a three-dimensional effect and be visible.
  • the three-dimensional body which in itself is transparent, for example, is not to be provided over a large area with, for example, an opaque base color layer, because the view of the product contained in the body is to be retained.
  • This is often the case, for example, with transparent beverage bottles if they are to be printed with only one label or one inscription, possibly even multicolored, or the three-dimensional body is used for other reasons, for example because of a particularly high-quality surface. not to be coated over the printed image (printing area). In this case, it is disturbing that at the edges of the printed image the (usually different colored, especially white) base color layer shines through. This effect is particularly due to the relative movement between the surface of the three-dimensional object to be printed and the drop of ink which hits this surface.
  • this relative movement can be very large.
  • these objects are moved at a high speed in front of the drop-on-demand inkjet printing heads rotates.
  • the result of this is that the drop on the surface does not result in a circular shape and, for example, flows evenly over the edge of a previously applied layer, for example the base color layer, and covers this edge, but blurs it against the relative movement. so distorted. It therefore results in a rather teardrop-shaped contour on the surface.
  • a sub-base usually referred to as a primer
  • a coating which is also referred to as a varnish / topcoat in the sense of a coating varnish
  • This coating is intended to protect the printed image from damage.
  • the coating is usually a lacquer, but according to the invention may also consist of another material, for example a transparent and preferably color-neutral plastic layer in the sense of a plastic coating.
  • the primer 13 and the coating 16 are also shown in Fig. 1.
  • the object of the present invention is that, by digital printing by means of inkjet printheads on the surface of a three-dimensional len article (in particular curved, for example, cylindrical, surface) generated image qualitatively to improve.
  • the primary color layer which in particular forms the first color layer, be printed smaller than the overlying color layer and / or the overlying coating.
  • the individual layers are thus constructed according to the invention from different printing specifications, in particular with regard to the size of the area to be printed or coated, in such a way that the disadvantages described above are avoided.
  • the color layer printed on the first color layer being larger than the first color layer, it covers the first color layer in preferably all directions, which therefore no longer appears as a disturbing edge on the edge of the printed image.
  • the first color is used as e.g. white color layer (referred to as base color layer) is printed smaller than the overlying image of other colors that are printed in the other color layer.
  • base color layer e.g. white color layer
  • the difference in the size of the pressure of the individual layers are usually only a few pixels. These distort the print optically not recognizable.
  • a coating be printed over the color layer. This can be done directly on the color layer or only indirectly, ie after application of a possibly further intermediate layer, such as a masking, a security feature or the like .
  • the coating forms the top after printing the top layer, ie the top layer on the finished printed and / or processing object, in particular in the sense of a ready-made object.
  • the coating thus forms in this sense a protective layer for the underlying application layers (in particular the color layer and the first color layer, also referred to as the base color layer).
  • the coating is therefore also referred to as a topcoat or protective varnish layer (varnish / topcoat).
  • the term coating can therefore always have this meaning in this text.
  • the topcoat (varnish / topcoat) in its properties can be carried out according to the invention in particular to protect the colors from water, since the commonly used inks of the inkjet printheads are based on acrylate and have only limited water resistance.
  • the coating is made wider than the (in particular imaging) color layer and / or the base color layer. Wider in the sense of the invention is to be understood that the extent of the coating extends beyond the extent of the color layer at least in one direction, but preferably in all directions on the surface of the three-dimensional object. The same applies to the base color layer. Since the cover or protective varnish layer (varnish / topcoat) formed by the coating is wider or larger than the latter actual print image of the imprint-producing ink layer, thus also the open edges of the printed image are protected.
  • a further, particularly preferred embodiment of the proposed method provides that the first color layer or base color layer is printed or formed smaller than the color layer and / or the coating.
  • the color layer may be composed of a plurality of color layers lying above the first color layer or base color layer. Thus, the edge of the base color layer is covered by the color layer and / or the coating. Smaller in the sense of the invention is to be understood such that the extent of the first color layer (also referred to as the base color layer in the context of disclosure) the extent of the subsequently applied color layers (also referred to simply as color layer in the context of the disclosure) in at least one direction, but preferably in all directions on the surface of the three-dimensional object, falls below.
  • the color layer (applied later) is wider than the base color layer or first color layer in the sense that the extent of the color layer projects beyond the extent of the first color layer in at least one direction, but preferably in all directions on the surface of the three-dimensional object , The same applies to the coating in relation to the first color layer and / or the overlying color layers.
  • the base color layer may also be used in the print image to form a visible background color or a color of the multicolor print image. If only a monochrome color design is necessary for the print image, the base color layer (in the desired print motif) can be applied directly to the surface of the three-dimensional object or a primer provided thereon are printed. In such an application then the further color layer is missing.
  • the measure for this will be selected by the person skilled in the art, in particular as a function of the printing press and the printing inks or varnishes or printing varnishes corresponding to their properties in the printing or during the application, if necessary by pressure and / or application attempts. It is advantageous if the measure the overlap in the method can be parameterized in order to be able to adapt the method to different operational situations.
  • the base color layer can be in the range from 1 to 100, preferably 5 to 30, based on the print resolution of the ink layer specified in pixels in terms of pixel dots, which is defined by the structure and control of the inkjet print heads relative to the relative movement to the object Pixels are smaller than the color layer. This is sufficient so that the color layer covers the base color layer. The same can also apply to the other layers.
  • the coating is at least in the range between 1 to 100, preferably 5, based on the printing resolution of the ink layer, which is defined by the structure and the control of the inkjet printheads in relation to the relative movement to the object up to 30 pixels larger than the color layer. This is sufficient so that the coating covers the color layer.
  • the coating can also be made larger in order, for example, to detect further areas of the surface of the three-dimensional object besides the printed image or the imprint, which in particular comprises all the layers applied below the coating by the method according to the invention.
  • the color layer representing the actual print image that is possibly also containing a graphic motif
  • reduce the base color layer relative to this color layer and the coating is increased in relation to this color layer. If, for example, the color layer is missing from a monochrome print produced by the base color layer, this base color layer becomes the reference for the size of printing because it then defines the visible size of the printed image produced by the print. This ensures that the representation of the printed image containing the motif to be printed is not distorted.
  • this can also be described such that the layer determining the motif of the printed image, in particular colored, forms the reference for the size, and the other layers are made smaller or larger in the manner described. These layers are enlarged at their sides by clipping or adding edge areas. According to the invention, it is important that no scaling of the other layers takes place, in particular if they have a structural or motif effect which manifests itself in the finished printed image.
  • a primer also referred to as a primer
  • This primer is preferably colorless and transparent in order not to influence the further design of the print or printed image.
  • a primer may be necessary in order to ensure that the individual layers (base color layer and optionally further color layer) sufficiently adhere to the surface and do not blur. Therefore, the primer is usually printed or applied directly on the surface of the three-dimensional object. Suitable primers vary according to the substrate and are known in the art.
  • the primer in particular in its function as primer
  • the additional primer can be omitted.
  • the base color layer then represents a colored primer that may be transparent or opaque.
  • the primer is preferably wider than the color layer and thus the color printed image produced in the color layer in order to come into direct contact with the coating.
  • the primer is preferably wider or narrower than the coating.
  • the coating will finish on the primer.
  • a transparent or partially transparent primer is applied as a primer, it is achieved that this primer is wider than the printed image and also wider than any transparent or partially transparent topcoat applied as a coating, so that there is sufficient primer for any layer or ink layer above it , If, on the other hand, the primer is narrower or smaller than the coating, the coating covers the primer.
  • the base color layer and the color layer in this construction are enclosed by the coating and the primer, so that the two layers (which decisively determine the visual impression of the printed image), i. in particular the color layer and possibly the base color layer and, if appropriate, further layers not described here in detail, are well protected against environmental influences.
  • primer or primer as a primer and a topcoat as a coating are so interwoven that the colors (ink layer and base color layer) between the two layers are "welded in" as it were in the package and thus are optimally sealed off from environmental influences.
  • the coating wider is as the primer (or the primer is narrower than the coating). Then the coating, which usually ensures the best protective effect with regard to external environmental influences, reaches directly down to the surface of the three-dimensional object. This prevents, for example, a solvent from dissolving the primer from the side, eating under the base color layer and leading to a detachment of the entire print or parts thereof from the printed surface.
  • the invention also relates to a three-dimensional object, in particular a container with a three-dimensional surface contour, with a print on the surface of the three-dimensional object, wherein the imprint of a printed image in a digital printing process by means of inkjet printheads is carried out in several printing steps.
  • the special feature is that superimposed layers produced in successive printing steps become wider at the top, so that they also cover the edge of the underlying layer.
  • the three-dimensional objects may according to the invention particularly preferably be bottles, cans or other, in particular bottle-shaped, containers which are printed in such a way that the aesthetics of these containers or bottles are retained in accordance with the proposed printing method.
  • This is achieved by making color layers narrower to avoid flashes of inward colors (or as a color layer from one layer to the underlying layer).
  • it is proposed according to the invention to design the three-dimensional object in such a way that with transparent paints or varnishes as applied transparent layers to the outside, so as a lacquer layer, always wider than the underlying layer of paints or varnishes, with the possible exception of a possibly lowest transparent or partially transparent layer, which should be wider than the layer above.
  • this results in a three-dimensional object in which, starting from a color layer graphically containing the color layer below this color layer, layers are made narrower downwards with color and / or transparent or partially transparent layers are made wider at the top.
  • a three-dimensional object results concretely, starting from the surface of the three-dimensional object to be printed as the first colored and therefore opaque layer a base color layer and above this as a second colored layer a color layer, which optionally consists of a plurality of successively printed Mixed colors is constructed to produce the printed image is arranged, wherein the base color layer is narrower than the color layer, and that starting from the surface of the three-dimensional object to be printed as the first transparent or partially transparent layer is provided a primer on which the first and the second Colored layer (ie, the base color layer and the color layer) are applied, and that as a second transparent layer, a coating is provided, which is applied to the ink layer and wider than the primer, which is the first transparent or partially forms transparent layer.
  • Fig. 1 shows schematically a side view of an imprint on a three-dimensional object according to the prior art
  • FIG. 2 shows a section through a three-dimensional object with an imprint applied according to the invention in accordance with a preferred embodiment
  • FIG. 1 shows schematically a conventional imprint 1 1 on a three-dimensional object 12 whose surface is curved.
  • the curvature is not visible here for the sake of simplicity in the detail of the article 12.
  • a primer 13 as a primer for the following layers, a (usually white) base color layer 14, a possibly made of different colors in digital printing color layer 15 and a coating 16 applied.
  • the printed image of the imprint 1 1 is (at least significantly and in its motif structure) determined by the ink layer 15, which therefore determines the total size of the imprint 1 1.
  • Each of the layers 13, 14, 15 and 16 has in the known imprints the same size as the image forming ink layer 15. From the side, as indicated by the arrow, therefore, the edges of all layers 13, 14, 15, 16 can be seen.
  • the layers are (at least for the most part) transparent, such as the primer 13 and the coating 16, these do not disturb the overall visual impression. It is different in the case of opaque, colored layers, such as the base color layer 14, which lies under the color layer 15 and is usually colored neutral in color white.
  • the white base color layer 14 at the edge of the printed image under the actual color layer 15 with the printed image is intensified in the case of a curvature of the surface (not shown here for the sake of simplicity).
  • an imprint 1 on a three-dimensional object 2 in particular with a curved surface, these disadvantages are avoided, as can be seen from FIG.
  • a section through the article 2 and the imprint 1 is also selected in FIG. 2, in which the curvature of the article 2 is not apparent.
  • the article 2 is a bottle or can which is printed in a digital print with inkjet printheads.
  • the basic structure of the imprint 1 is similar to the prior art.
  • a primer 3 On the surface of a primer 3 is applied, on which a base color layer 4 is printed.
  • this opaque (preferably monochrome, depending on the thickness of a different brightness having) base color layer 4 On this opaque (preferably monochrome, depending on the thickness of a different brightness having) base color layer 4, the actual print image as a motif in digital printing with mostly four inkjet printheads colors cyan (C), magenta (M), yellow (Y) and black (K) printed.
  • the base color layer can also be printed with the same inkjet printheads in appropriate control. Digital printing machines for this purpose are known in the art and therefore need not be described in detail at this point.
  • this transparent primer 3 is now formed larger than the color layers printed thereon, i. the base color layer
  • the primer can also be printed by means of an inkjet printhead or applied to the surface in the desired size and shape using other known methods.
  • the primer 3 is at least 1 to 10 pixels larger at each edge than the fern layer 5, which forms the largest color layer on the primer 3.
  • the transparent primer 3 is replaced by a (usually white and thus other colors not influencing, possibly but differently colored) base color layer 4 applied, which provides the desired opacity (opacity).
  • the degree of opacity can be adjusted, for example, by the layer thickness.
  • This base color layer 4 is also optimally printed. The actual printed image in the color layer 5 is then printed on this base color layer 4 as described.
  • this color layer 5 is predetermined by the printed image.
  • the base color layer 4 is printed at the (all) side edges of the printed image by a few pixels, preferably between 1 and 10 pixels, smaller than the printed image or the color layer 5. This has the consequence that the color layer 5 lays on the edge over the base color layer 4 and this covered with the actual printed image.
  • a coating 6 can be applied, which is at least a few pixels larger than the color layer 5, but preferably a few pixels larger than the primer 3. Some pixels again means 1 to 10 pixels. This case is shown in FIG.
  • the coating 6, as a varnish or topcoat infuses the entire layers applied to it under the surface and assumes the function of a protective varnish.
  • the coating can be printed or applied to the surface with other known methods in the desired size and shape.
  • the coating 6 may be formed as a protective lacquer on the surface of the three-dimensional object 2 itself possibly significantly larger than the underlying layers 3, 4 and 5. However, this is not shown in Fig. 2. LIST OF REFERENCE NUMBERS

Landscapes

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

Abstract

L'invention concerne un procédé d'impression de surfaces d'objets (2) en trois dimensions, possédant en particulier une surface cylindrique ou incurvée, tels que des bouteilles ou des boîtes, au moyen de têtes d'impression à jet d'encre ainsi qu'un objet (2) en trois dimensions pourvu d'une impression correspondante. Une couche de couleur de fond (4) est imprimée sur l'objet (2) en trois dimensions en tant que première couche de couleur et une autre couche de peinture (5) est imprimée et/ou une couche revêtement (6) déposée sur ladite couche de fond. Selon l'invention, la couche de couleur de fond (5) est plus petite que la couche de couleur (5) sus-jacente et/ou la couche de revêtement (6) sus-jacente.
EP14765956.9A 2013-09-13 2014-09-15 Procédé d'impression de surfaces en trois dimensions et objet imprimé en trois dimensions Active EP3044007B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013015098 2013-09-13
PCT/EP2014/069599 WO2015036588A1 (fr) 2013-09-13 2014-09-15 Procédé d'impression de surfaces d'objets en trois dimensions et objet en trois dimensions pourvu d'une impression

Publications (2)

Publication Number Publication Date
EP3044007A1 true EP3044007A1 (fr) 2016-07-20
EP3044007B1 EP3044007B1 (fr) 2021-07-14

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ID=51539283

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EP14765956.9A Active EP3044007B1 (fr) 2013-09-13 2014-09-15 Procédé d'impression de surfaces en trois dimensions et objet imprimé en trois dimensions

Country Status (3)

Country Link
US (1) US10279599B2 (fr)
EP (1) EP3044007B1 (fr)
WO (1) WO2015036588A1 (fr)

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JP3169127U (ja) 2011-05-02 2011-07-14 日本紙工株式会社 印刷物
JP5887831B2 (ja) 2011-10-25 2016-03-16 セイコーエプソン株式会社 印刷装置及び印刷方法
US9221306B2 (en) 2011-12-16 2015-12-29 Bridgestone Corporation Tire printing method and tire printing apparatus

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US20160221359A1 (en) 2016-08-04
WO2015036588A1 (fr) 2015-03-19
US10279599B2 (en) 2019-05-07

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