EP3558685B1 - Procédé et machine d'impression directe pour imprimer sur des récipients en différents types de matériau en impression directement - Google Patents

Procédé et machine d'impression directe pour imprimer sur des récipients en différents types de matériau en impression directement Download PDF

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Publication number
EP3558685B1
EP3558685B1 EP17794281.0A EP17794281A EP3558685B1 EP 3558685 B1 EP3558685 B1 EP 3558685B1 EP 17794281 A EP17794281 A EP 17794281A EP 3558685 B1 EP3558685 B1 EP 3558685B1
Authority
EP
European Patent Office
Prior art keywords
ink
base
printing
containers
base ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17794281.0A
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German (de)
English (en)
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EP3558685A1 (fr
Inventor
Andreas Sonnauer
August Peutl
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Krones AG
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Krones AG
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Publication of EP3558685A1 publication Critical patent/EP3558685A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1707—Conditioning of the inside of ink supply circuits, e.g. flushing during start-up or shut-down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
    • B41J2/211—Mixing of inks, solvent or air prior to paper contact

Definitions

  • the invention relates to a method and a direct printing machine for printing containers made of different types of material in direct printing, having the features of the preamble of claims 1 and 8.
  • direct printing methods are now increasingly being used, in which the containers are printed directly with direct print heads.
  • a direct print head can, for example, work according to the ink jet printing method, with individual ink droplets being applied to a container by means of a large number of printing nozzles.
  • the printing nozzles are usually arranged in one or more parallel rows of nozzles and can be controlled individually.
  • the containers are rotated, for example with container mounts, in relation to the direct print head, so that a flat print image is created in one printing color.
  • the container is usually first printed with a base ink that is compatible with its material type and then with other colored inks.
  • several direct print heads are arranged on a transport device, which apply individual print images from the basic ink and several color inks to the container circumference (for example a basic white ink and the color inks cyan, magenta, yellow and black). The print images are then combined to form the multicolored direct print.
  • the DE 10 2013 213843 A1 discloses a container treatment device for printing on containers.
  • the EP 2 848 414 A1 discloses a printing machine for ink jet printing on containers.
  • the U.S. 2003/007040 A1 discloses an ink supply system and method for continuously replenishing ink in a printhead cartridge.
  • the object of the present invention is therefore to provide a method and a direct printing machine for printing containers made of different types of material in direct printing, in which the change to a container made of a different type of material is less complex.
  • the invention provides the method for printing containers made of different types of material in direct printing with the features of claim 1.
  • Advantageous embodiments are specified in the dependent claims.
  • the first basic ink is replaced with a second basic ink that is compatible with the second material type when changing to the container of the second material type
  • mixing of the basic inks in the printing unit does not have a negative effect on their chemical and physical stability. Consequently, the first base ink does not have to be completely removed from the printing unit in order to be able to switch to the second base ink. Consequently, necessary flushing processes of the printing unit can be reduced or completely avoided when changing.
  • the first and second base inks are compatible with one another, the color inks do not have to be changed either, since they adhere to both base inks. Consequently, the printing units with the color inks do not have to be changed. Overall, there is a significantly reduced set-up time when changing to the container with the second type of material.
  • the method can be carried out with a direct printing machine for printing on containers in a beverage processing plant.
  • the direct printing machine can be downstream of a filling system for filling a product into the containers and/or a closing device.
  • the direct printing machine can also be installed upstream of the filling process and/or directly downstream of a container production process.
  • the method can be carried out in a control device of the direct printing press, which controls the printing units and the direct printing heads.
  • the containers can be intended to hold beverages, hygiene articles, pastes, chemical, biological and/or pharmaceutical products.
  • the containers can be provided for any free-flowing or fillable media.
  • the first and/or second material type of the container can be plastic, glass or metal, but hybrid containers with mixtures of material types are also conceivable.
  • the first and/or second material type can be PET, HD-PE or PP.
  • the material type can be a biodegradable material, for example corn starch.
  • the first and second material types can be different from each other.
  • the containers can be bottles, cans and/or tubes.
  • the containers can be rotationally symmetrical in cross section and/or shaped containers with at least one surface deviating from the rotational symmetry about the longitudinal axis of the container.
  • the mold containers may include at least one relief surface area.
  • the transport device can comprise a carousel or a conveyor belt.
  • the container can preferably be rotated about its longitudinal axis by means of a container receptacle on the transport device in order to produce a flat printed image via the rotary movement.
  • the containers can be fed to individual printing units by means of the transport device, with the printing units each comprising one or more direct print heads. It is conceivable that the transport of the containers stops during a printing process or continues continuously.
  • the printing units can be arranged in a stationary manner along the transport device designed as a carousel.
  • the printing units on the transport device which is designed as a carousel, can be configured to rotate as well, preferably with a printing unit being assigned to each container receptacle.
  • the printing units can each include one or more direct print heads and an ink supply for the first basic ink or one of the at least one color ink.
  • the direct print head can work with a digital or inkjet printing process in which the printing ink is delivered to the containers by means of the printing nozzles.
  • "Inkjet printing process” here can mean that a sudden increase in pressure is generated in chambers of a print nozzle via piezo or thermo elements, so that a small amount of ink is forced through the print nozzle and delivered as a print drop to the container.
  • Each pressure nozzle can be designed to create a pressure point on the container.
  • the direct print head can comprise a nozzle plate which has at least one row of nozzles with the printing nozzles.
  • a row of nozzles can have a number of printing nozzles in a range of 100-10000, in particular in a range of 250-1024. It is also conceivable that the nozzle plate has a plurality of rows of nozzles (for example 1-8) arranged parallel to one another.
  • the ink supply may include one or more ink pumps and/or one or more ink tanks.
  • the ink tanks may each be provided for the first or second base ink or one of the color inks.
  • the ink pumps can be designed to supply ink to one or more direct print heads.
  • the ink is pumped from the ink tank to the direct printhead, through it, and then back into the ink tank. This creates an ink circuit so that the respective ink remains in motion and does not stick to the inside of the liquid line or in the direct print head.
  • the fact that the containers of the second type of material are then printed in multiple layers with the second base ink and then with the at least one colored ink can mean here that the containers of the second type of material are printed with the same colored inks as the containers of the first type of material.
  • Multi-layered can mean that a layer containing at least one of the color inks is printed on top of a layer containing the base ink.
  • the base ink may comprise a white color and/or a white undercoat.
  • the color inks can be cyan, magenta, yellow or black. Special colors, for example a metallic silvery color, are also conceivable.
  • the base ink and/or the color inks can be UV-curable printing inks.
  • the basic ink and/or the colored inks can preferably be cured with a pinning station and/or a curing station with UV light. "Base ink” can mean here that this is a printing ink that can be printed directly onto an untreated surface of the container and that adheres particularly well to the type of material that is compatible with it.
  • Color ink can mean here that this is a printing ink that can be printed on the base ink or one of the other color inks and that adheres particularly well to the areas of the container that have already been printed with it.
  • base ink compatibility with a particular type of material may mean that it will adhere to and wet (e.g., not bleed) a surface of a container of that particular type of material.
  • Multi-layered can mean here that the bottom layer is formed by the base ink and one or more color layers of the colored ink are on top.
  • the method can include a further change to containers of the first material type or a third material type, in which the second base ink is replaced by the first base ink or a third base ink compatible with the third material type, and that the containers of the first material type or the third material type then be printed in multiple layers with the first or third base ink and then with the at least one color ink.
  • the second base ink is chemically and physically compatible with the first base ink in such a way that both base inks can be completely mixed with one another and no destabilization of the two base inks is caused.
  • the second base ink can be chemically and physically compatible with the first base ink in such a way that both base inks can be mixed to form a single phase and as a result, in particular, no accumulations of color particles and/or enlarged color particles are caused.
  • the second The base ink must be chemically and physically compatible with the first base ink in such a way that the two base inks can be mixed to form a color mixture that is stable over a period of at least one day, preferably at least one month, in particular with a viscosity and/or a particle size distribution of the color mixture changing does not change significantly.
  • the first base ink and the second base ink may have a substantially equal surface tension.
  • the first and second base inks may have the same or similar polarity.
  • the fact that the second base ink is chemically compatible with the first base ink can mean here that the first and second base inks and/or their components do not chemically react with one another.
  • One of the printing units is designed for printing the first and second basic ink with at least one direct print head, and an ink supply supplies the at least one direct print head with either the first or second basic ink for printing.
  • an ink supply supplies the at least one direct print head with either the first or second basic ink for printing.
  • the at least one direct print head and/or the ink supply can be at least partially emptied with the first base ink, preferably flushed at least once and filled with the second base ink.
  • the ink supply can be set up in a particularly simple manner. It is conceivable that the ink supply has both a supply line for the first base ink and for the second base ink. This allows the ink supply to be switched automatically. It is conceivable that a common tank and a common supply path are used for the ink supply, which are emptied, flushed and filled accordingly.
  • the ink supply may have a separate tank for the first and second basic inks, which are connected to the at least one direct print head via a switchable supply path. Accordingly, only the parts of the supply path used for both base inks are emptied, rinsed and filled with the second base ink. During flushing, the at least one direct print head and/or a common supply line for both base inks can be flushed. It is conceivable that the ink supply comprises an ink circuit with a feed and a return to and from at least one direct print head, which is then emptied accordingly, preferably flushed at least once and filled with the second basic ink.
  • the at least one direct print head and/or the ink supply can be filled at least once with the second base ink during flushing, so that after emptying mixing the first base ink remaining therein with the second base ink.
  • the first base ink can be drained as much as possible from the at least one direct print head and/or the ink supply and then the at least one direct print head and/or the ink supply can be flushed with the second base ink. This results in a first mixture with, for example, 20% of the first base ink and 80% of the second base ink.
  • the first mixture is then also emptied and flushed again with the second base ink. This results in a second mixture of both base inks, with only a proportion of 4% of the first base ink and 96% of the second base ink.
  • the second mixture can then either be used for printing or flushed again with the second base ink. This results in a maximum residual amount of the first base ink in the mixture of less than 1%.
  • the at least one direct print head can be supplied with the ink supply either from a first ink supply with the first basic ink or from a second ink supply with the second basic ink, and the ink supply can switch when changing from the first ink supply to the second ink supply.
  • the first ink supply and/or the second ink supply can each comprise a tank with the first base ink and the second base ink, respectively.
  • the ink supply may include a directional control valve to switch from the first ink supply to the second ink supply.
  • the at least one direct print head is supplied with at least one additional basic ink during printing by means of the ink supply, optionally from the first ink supply, from the second ink supply and from at least one additional ink supply.
  • the ink supply may selectively mix a base with a first or second additive to form either the first or second base ink, respectively, wherein when changing the ink supply changes from mixing the base with the first additive to mixing the base with the second additive switches.
  • the first base ink and the second base ink can be selectively mixed by the printing aggregate from the base component and the first additive or the second additive. This results in less ink loss when changing.
  • the ink supply may source the base, primary and secondary additives from different supplies, respectively.
  • the ink supplies for the base, first and second additives each comprise different supplies connected to the at least one direct printhead via respective supply lines and a mixer for mixing the base with the first or second additive.
  • one of the printing units for printing the first basic ink can be switched over or exchanged for another printing unit for printing the second basic ink. If, for example, separate printing units are provided for the first and the second base ink, the changeover is possible during ongoing operation, since the corresponding other printing unit simply has to be activated. It is also conceivable for the printing unit with the first basic ink to be exchanged for a printing unit with the second basic ink on the printing machine.
  • the invention provides a direct printing machine for printing containers made of different types of material with direct printing, having the features of claim 8 .
  • Advantageous embodiments are specified in the dependent claims.
  • one of the printing units is designed to be switchable depending on the material type of the container for printing at least two different basic inks or there are several printing units for printing correspondingly different basic inks, which are designed to be switchable or interchangeable depending on the material type of the container, containers according to Material type can be printed with the compatible base ink. This results in a significantly reduced set-up time when changing between containers of different material types.
  • the direct printing machine for printing containers can be arranged in a beverage processing plant.
  • the transport device can be designed as a carousel with container receptacles arranged circumferentially.
  • the container receptacles can include a turntable and/or a centering bell.
  • the printing units can be arranged in a stationary manner on the periphery of the carousel. It is also conceivable for a printing station to be arranged on each of the container receptacles, with each of the printing stations comprising a plurality of printing units for the multi-layer printing of the containers with the base ink and the colored inks.
  • the ink supply comprises an ink circuit with a feed and a return to or from at least one direct print head, with which the base ink can be continuously pumped around during operation.
  • One of the printing units can be designed to print a first and a second basic ink with at least one direct print head, and an ink supply can be designed to supply the at least one direct print head with either the first or second basic ink.
  • the printing unit for the first and second basic inks can be constructed in a particularly cost-effective manner.
  • the ink supply may include a first tank for the first base ink and a second tank for the second base ink. Both tanks can be connected to the at least one direct print head via a switching element.
  • the switching element may be configured to switch between the supply of the first base ink and the second base ink.
  • the switching element can include a three-way valve.
  • the printing unit is designed to print the first and second basic inks in addition to printing at least one third basic ink with the at least one direct print head, wherein the ink supply can be designed to supply the at least one direct print head with the first, the second or to supply the at least one third base ink.
  • the ink supply may be configured to selectively mix a base with a first additive or a second additive to form either the first or second base ink, respectively, wherein the ink supply is adapted to change the material type of the container from the mix of the base with the first additive is designed switchable to the mixture of the basic component with the second additive. Since the basic component can be used for both base inks, there is less ink loss when changing the base ink.
  • One of the printing units can be designed to be exchangeable for printing a first basic ink for containers of a first type of material against another of the printing units for printing a second basic ink for containers of a second type of material.
  • the first base ink can be exchanged for the second base ink particularly quickly.
  • the at least two different base inks can be chemically and physically compatible with one another in such a way that they can be mixed into a single phase and, in particular, no accumulations of color particles and/or enlarged color particles are caused as a result.
  • the two different base inks can have substantially the same surface tension.
  • the two different base inks may have the same or similar polarity. That the two chemically compatible with different base inks can mean that the two base inks and/or their components do not chemically react with each other.
  • the direct printing machine can include the features described above in relation to the method individually or in any combination.
  • FIG 1 an exemplary embodiment of a method 100 according to the invention for printing containers made of different material types in direct printing is shown as a flow chart.
  • step 101 containers of the first material type are transported to the printing units.
  • the printing units can be arranged in a stationary manner on a transport device, with the containers being transported back and forth to the individual printing units during transport.
  • container receptacles, each with a printing station are arranged on a transport device, for example a carousel, wherein each of the printing stations comprises a plurality of printing aggregates in order to print at least one base ink and at least one color ink.
  • the containers of the first material type are then printed using the direct printing method with a first base ink that is compatible therewith.
  • the first base ink is physically and chemically designed in such a way that it adheres particularly well to the first type of material.
  • these are containers made of HD-PE.
  • the first basic ink is white in color so that the color inks printed in the subsequent step 103 appear as brilliant as possible.
  • step 103 the containers of the first material type are then also printed with a plurality of color inks, for example cyan, magenta, yellow and black, using the direct printing method.
  • a plurality of color inks for example cyan, magenta, yellow and black
  • the printing inks are printed in multiple layers one on top of the other, so that overall a multicolored direct print is produced.
  • Direct printing process means here that the containers are printed with direct print heads that work according to a digital or inkjet printing process.
  • Each of the direct print heads preferably comprises four rows of nozzles with, for example, 1024 print nozzles.
  • any other suitable configuration of the pressure nozzles is also conceivable.
  • the container of the second material type After the completion of the container of the first material type, there is then a change to the container of the second material type in step 200, 300 or 400.
  • the first basic ink is exchanged for a second basic ink that is compatible with the second material type.
  • the second base ink is chemically and physically compatible with the first base ink in such a way that both base inks can be mixed into a single phase, so that neither accumulations of color particles nor enlarged color particles are caused. This simplifies the change considerably, since the first basic ink does not have to be completely removed from the corresponding printing unit.
  • the containers of the second material type are transported to the printing units in step 104 in accordance with step 101 described above.
  • the containers are first printed in step 105 with the second base ink, which is compatible with the second material type, in a manner similar to step 102, but not with the first base ink but with the second base ink.
  • step 106 the containers of the second material type are printed with the same color inks as in step 103. In other words, done no change of color inks, as these are also compatible with the second base ink and adhere there.
  • FIG 2 are the sub-steps of the method 100 from FIG figure 1 for changing to the container of the second type of material according to a first variant 200 shown as a flow chart.
  • the direct print head of the printing assembly is supplied with the first base ink from a first ink reservoir.
  • the first ink supply can comprise a tank from which the first base ink is pumped to the direct print head by means of the ink supply. This occurs during step 102 previously described.
  • the first base ink is then first emptied from the printing assembly in step 202 . This is done from all supply lines or lines in which the second base ink is then filled. For example, it is emptied into a waste container or the like.
  • the ink supply is switched over to the second ink supply.
  • This is done, for example, with a directional control valve or another suitable device.
  • the second supply of ink may also include a tank from which the second base ink is pumped to the direct printhead by the ink supply.
  • step 204 the printing unit is flushed.
  • all supply lines of the ink supply that are used jointly by the first and second base ink are flushed.
  • the rinsing is expediently carried out with the second base ink, since this is chemically and physically compatible with the first base ink. For example, when it is emptied in step 202, 20% of the first base ink still remains in the printing assembly. Consequently, when flushing, the remaining 80% is filled with the second base ink. After mixing both base inks, the mixture is emptied a second time and refilled with the second base ink. Then the proportion of the first base ink in the mixture is only 4%. The emptying and refilling with the second base ink continues until the remaining amount of the first base ink falls below a desired percentage of the total mixture.
  • step 205 the direct print head of the printing assembly is supplied with the second base ink from the second ink reservoir. This occurs during step 105 previously described to print the containers of the second type of material therewith.
  • FIG 3 are the sub-steps of the method 100 from FIG figure 1 for changing to the container of the second material type according to a second variant 300 shown as a flowchart.
  • first basic ink is mixed from a basic component and a first additive
  • second basic ink is mixed from the same basic component and a second additive at the printing unit.
  • the direct print head is supplied with the first base ink (during step 102 described above), the first base ink being mixed from the basic component and the first additive.
  • the basic component is, for example, a carrier liquid that can be used for both the first and the second base ink.
  • the basic component is obtained from a corresponding supply and the first additive from a further supply via corresponding supply lines of the ink supply, mixed together and fed to the direct print head.
  • step 302 the first base ink is first emptied from the printing unit, in particular from the supply lines, which are subsequently also used with the second base ink.
  • step 303 the ink supply is switched over to the second supplement. Similar to step 301, the base is then mixed with the second additive and fed to the direct print head. The second addition is drawn from another supply.
  • the printing unit is then flushed with the second base ink, that is to say with a mixture of the basic component and the second additive. This is done in a manner similar to that described in step 204 above.
  • the printing unit can be emptied several times and refilled with the second base ink from the mixture of the basic component and the second additive.
  • the direct print head of the printing assembly is then supplied with the second base ink, which is mixed from the basic component and the second additive (during step 105 described above).
  • FIG 4 are the sub-steps of the method 100 from FIG figure 1 for changing to the container of the second material type according to a third variant 400 shown as a flow chart.
  • step 401 the printing of the first base ink, as described in step 102 described above, takes place with a first printing assembly.
  • step 402 either a switch is made to a second printing unit that is already arranged at a printing position or the first printing unit is exchanged for the second printing unit at the same printing position.
  • step 403 the printing of the second base ink, as described in step 105 described above, is started with the second printing assembly.
  • FIG 5 an exemplary embodiment of a direct printing machine 1 according to the invention is shown in a plan view.
  • the containers 2 are initially placed in the container receptacles 5 by the feed star wheel 3 onto the transport device 4 designed as a carousel.
  • the transport device 4 rotates about the axis A in order to transport the containers 2 to the individual printing units 6 B1 , 6 B2 , 6 C , 6 M , 6 Y and 6 K .
  • additional printing units are also arranged on the transport device 4, for example for special colors.
  • the printing units 6 B1 , 6 B2 , 6 C , 6 M , 6 Y , 6 K work according to the direct printing method and are each designed with at least one direct print head and an ink supply (not shown in more detail here).
  • the containers 2 are printed by one of the printing units 6 B1 , 6 B2 either with a first base ink or a second base ink, depending on the type of material.
  • the first and second base ink are designed as a primer and are compatible with containers 2 of a first type of material or a second type of material.
  • the containers 2 are then transported to the printing units 6C , 6M , 6Y and 6K and printed there with cyan, magenta, yellow and black inks in direct printing. This results in a more colored direct print on the containers 2 .
  • the containers 2 are then moved past the curing station 7 in order to cure the first or second base ink and the colored inks.
  • the curing station can also be used separately be arranged by the transport device 4.
  • a pinning station to be arranged between the printing units 6 B1 , 6 B2 , 6 C , 6 M , 6 Y , 6 K in order to at least partially cure the previously applied printing ink for printing the subsequent printing ink. As a result, the printing inks do not run into each other and the quality is improved.
  • control device 8 can be seen, which the direct printing machine 1 according to the previously in the figure 1 Method 100 described and the sub-steps according to the third variant 400 from FIG figure 4 controls.
  • control device 8 is designed as a digital machine control.
  • the direct printing machine 1 from the figure 5 is used as follows: First, containers 2 of the first material type are printed using the direct printing method, with the first base ink being applied first with the printing unit 6 B and then the color inks with the printing units 6 C , 6 M , 6 Y , 6 K. When changing to the container of the second type of material, the printing unit 6 B1 with the first basic ink is then switched over to the printing unit 6 B2 with the second basic ink. As a result, changing to containers of a different type of material is particularly quick.
  • FIG 6 Another exemplary embodiment of a direct printing machine 1 according to the invention is shown in a plan view. This differs from the embodiment of FIG figure 5 essentially in that only a single printing unit 60, 70 for printing is designed to be switchable from either the first or the second base ink. All other elements of the direct printing machine correspond to those previously described figure 5 .
  • the ink supply 63 comprises a first tank 633 with a supply of the first base ink B1, a first delivery system 631 for the first base ink, a second tank 634 with a supply of the second base ink B2, a second delivery system 632 for the second base ink and a direct print head 62 optionally for the first or second base ink B1, B2.
  • the printing assembly 60 also includes the cleaning unit 64 and the waste container 65.
  • the cleaning unit 64 can be used to empty the first base ink B1 or also the second base ink B2 from the printing assembly in accordance with step 202.
  • the cleaning unit 64 includes a catch basin to catch ink from the direct print head 62 . It is also conceivable that the cleaning unit 64 includes a connection to the ink supply 63 into which excess basic ink can be drained when it is emptied.
  • the first and second base ink B1, B2 can be pumped back into the tanks 633, 634 from the direct print head 62 via the first or second conveyor system 631, 632. This allows the printing ink to be circulated.
  • the ink supply 63 can optionally switch over to supplying the direct print head 62 with the first basic ink B1 or with the second basic ink B2.
  • the direct print head 62 is initially supplied with the first base ink from the first tank 633 by the delivery system 631 .
  • the first basic ink B1 is first emptied to the cleaning unit 64 and into the waste container 65 (step 202).
  • the ink supply 63 is then switched over to the conveying system 632 and the second tank 634 with the second base ink B2.
  • the printing unit is then first rinsed according to step 204 and then supplied with the second base ink B2 from the second tank 634 according to step 205 .
  • FIG. 7B is an alternative embodiment of the printing unit 70 from FIG figure 6 shown in a plan view.
  • the printing unit 70 differs from that in FIG Figure 7A
  • the embodiment of printing unit 60 shown with regard to ink supply 73 is essentially characterized in that a basic component G from tank 733 is mixed with the first additive Z1 from tank 734 or the additive Z2 from tank 735 in order to produce the first or second base ink to mix optionally.
  • the conveying system 731 for containers of the first material type combines the first base ink from the basic component G from the tank 733 and the additive Z1 from the tank 734 mixes. As a result, the first basic ink is formed and the direct print head 72 is supplied with it.
  • the basic component G is drawn from the tank 733 by means of the conveyor system 732 for the second base ink and the additive Z2 from the tank 735 is mixed with it.
  • the direct print head 72 is supplied with the first basic ink, which is mixed from the basic component G and the additive Z1.
  • containers of the first material type are printed with the first base ink.
  • the first basic ink is then first emptied from the printing unit 70 according to step 302 by being drained via the cleaning unit 74 into the waste container 75, as described above.
  • the ink supply 73 is then switched over to the second supplement Z2 from the tank 735 (step 303) and the printing unit 70 is flushed with it (step 304).
  • the direct print head 72 is then supplied according to step 305 with the second base ink, which is mixed from the basic component G and the second additive Z2.
  • first and second base inks are chemically and physically compatible with one another in the exemplary embodiments described above, it is possible to flush the printing assembly 60, 70 with the second base ink when changing from the first to the second base ink. Or vice versa when changing from the second to the first base ink with the first base ink. Consequently, no further rinsing solution or the like is necessary to switch over the printing unit.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)

Claims (9)

  1. Procédé (100) d'impression de récipients en différents types de matériau avec une impression directe, dans lequel des récipients d'un premier type de matériau sont transportés avec un dispositif de transport (101) et sont imprimés (103) en plusieurs couches avec une première encre de base (102) compatible avec le premier type de matériau et par-dessus avec au moins une encre couleur, grâce à plusieurs unités d'impression et des têtes d'impression directe,
    caractérisé en ce que
    lors d'un changement (200, 300, 400) pour des récipients d'un second type de matériau, la première encre de base est remplacée par une seconde encre de base compatible avec le second type de matériau,
    les récipients du second type de matériau sont ensuite imprimés en plusieurs couches avec la seconde encre de base (104) et par-dessus avec la au moins une encre couleur (106),
    la au moins une encre couleur adhère aux deux encres de base,
    la seconde encre de base est chimiquement et physiquement compatible avec la première encre de base de telle manière que les deux encres de base sont entièrement miscibles l'une dans l'autre et qu'aucune déstabilisation des deux encres de base n'est provoquée, et
    une des unités d'impression permettant l'impression des première et seconde encres de base est réalisée avec au moins une tête d'impression directe et une alimentation en encre alimente (200, 300) de manière sélective la au moins une tête d'impression directe en première ou seconde encre de base en vue de l'impression.
  2. Procédé (100) selon la revendication 1, dans lequel, lors du changement (200, 300), la au moins une tête d'impression directe et/ou l'alimentation en encre de la première encre de base est/sont au moins partiellement vidée(s) (202, 302), de manière préférée rincée(s) (204, 304) au moins une fois et remplie(s) avec la seconde encre de base (205, 305).
  3. Procédé (100) selon la revendication 2, dans lequel la au moins une tête d'impression directe et/ou l'alimentation en encre est/sont remplie(s) au moins une fois avec la seconde encre de base lors du rinçage (204, 304), de sorte que la première encre de base y restant après le vidage (202, 302) se mélange avec la seconde encre de base.
  4. Procédé (100) selon la revendication 2 ou 3, dans lequel la au moins une tête d'impression directe et/ou une section d'alimentation commune aux deux encres de base est/sont rincée(s) lors du rinçage (204, 304).
  5. Procédé (100) selon l'une quelconque des revendications 1 à 4, dans lequel la au moins une tête d'impression directe est alimentée (205) lors de l'impression (102, 105) au moyen de l'alimentation en encre au choix à partir d'une première réserve d'encre avec la première encre de base (201) ou à partir d'une seconde réserve d'encre avec la seconde encre de base et l'alimentation en encre commute (203) de la première réserve d'encre vers la seconde réserve d'encre lors du changement.
  6. Procédé (100) selon l'une quelconque des revendications 1 à 4, dans lequel l'alimentation en encre mélange (301, 305) un composant de base de manière sélective avec un premier ou un second additif afin de former la première ou la seconde encre de base d'une manière qui lui correspond, et dans lequel l'alimentation en encre commute (303) du mélange du composant de base avec le premier additif vers le mélange du composant de base avec le second additif lors du changement.
  7. Procédé (100) selon la revendication 6, dans lequel l'alimentation en encre obtient le composant de base et les premier et second additifs respectivement à partir de stocks différents.
  8. Machine d'impression directe (1) permettant d'imprimer des récipients (2) en différents types de matériau avec une impression directe, de manière préférée selon le procédé (100) selon l'une quelconque des revendications 1 à 7, comprenant
    - un dispositif de transport (4) permettant de transporter les récipients (2), de manière préférée dans des réceptacles à récipients (5) ;
    - plusieurs unités d'impression (6B1, 6B2, 60, 70, 6c, 6M, 6Y, 6K) avec des têtes d'impression directes (62, 72) permettant l'impression en plusieurs couches des récipients (2) avec une encre de base (B1, B2) compatible avec le type de matériau et par-dessus avec au moins une encre couleur,
    caractérisée en ce que
    en vue du changement entre les différents types de matériau des récipients (2), une des unités d'impression (60, 70) est conçue de manière à pouvoir être commutée en fonction du type de matériau des récipients (2) pour l'impression d'au moins deux encres de base (B1, B2) différentes, dans lequel la au moins une encre couleur adhère aux deux encres de base,
    une des unités d'impression (60, 70) est conçue pour imprimer une première et une seconde encre de base (B1, B2) avec au moins une tête d'impression directe (62, 72) et une alimentation en encre (63, 73) est conçue pour alimenter la au moins une tête d'impression directe (62, 72) de manière sélective avec la première ou la seconde encre de base (B1, B2), et
    les au moins deux encres de base (B1, B2) différentes sont compatibles chimiquement et physiquement l'une avec l'autre de telle manière qu'elles sont miscibles en une seule phase.
  9. Machine d'impression directe (1) selon la revendication 8, dans laquelle l'alimentation en encre (73) est conçue pour mélanger un composant de base (G) de manière sélective avec un premier ou un second additif (Z1, Z2) afin de former la première ou la seconde encre de base (B1, B2) d'une manière qui lui correspond, et dans laquelle l'alimentation en encre (73) est conçue de manière à pouvoir être commutée du mélange du composant de base (G) avec le premier additif (Z1) au mélange du composant de base (G) avec le second additif (Z2) en vue d'un changement du type de matériau des récipients (2).
EP17794281.0A 2016-12-23 2017-10-24 Procédé et machine d'impression directe pour imprimer sur des récipients en différents types de matériau en impression directement Active EP3558685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016226166.5A DE102016226166A1 (de) 2016-12-23 2016-12-23 Verfahren und Direktdruckmaschine zur Bedruckung von Behältern aus unterschiedlichen Materialtypen im Direktdruck
PCT/EP2017/077090 WO2018114097A1 (fr) 2016-12-23 2017-10-24 Procédé et machine d'impression directe pour imprimer sur des récipients en différents types de matériau en impression directement

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EP3558685B1 true EP3558685B1 (fr) 2023-03-15

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US (1) US11241890B2 (fr)
EP (1) EP3558685B1 (fr)
CN (1) CN110167759B (fr)
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WO (1) WO2018114097A1 (fr)

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DE102018131988A1 (de) 2018-12-12 2020-06-18 Krones Aktiengesellschaft Vorrichtung und Verfahren zur Handhabung und/oder zum Verpacken von Artikeln
DE102021113824A1 (de) * 2021-05-28 2022-12-01 Krones Aktiengesellschaft Verfahren zum Erzeugen eines reliefartigen Druckbilds auf Behältern

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US20030007040A1 (en) * 2001-07-03 2003-01-09 Eastman Kodak Company Large volume ink supply system
KR20080104140A (ko) * 2006-03-27 2008-12-01 니혼 이타가라스 가부시키가이샤 금색조를 가지는 광휘성 안료, 이를 함유하는 화장료, 도료, 잉크, 또는 수지 조성물
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DE102013207809A1 (de) * 2013-04-29 2014-10-30 Heidelberger Druckmaschinen Ag Direktdruckverfahren mit Unterschicht
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DE102014225256A1 (de) * 2014-12-09 2016-06-09 Krones Ag Verfahren und Vorrichtung für den Tintenstrahldruck auf Behälter

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Publication number Publication date
DE102016226166A1 (de) 2018-06-28
WO2018114097A1 (fr) 2018-06-28
US20200189292A1 (en) 2020-06-18
US11241890B2 (en) 2022-02-08
CN110167759A (zh) 2019-08-23
CN110167759B (zh) 2021-07-27
EP3558685A1 (fr) 2019-10-30

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