EP2860036A1 - Dispositif d'impression, imprimante et procédé de fonctionnement d'un dispositif d'impression - Google Patents

Dispositif d'impression, imprimante et procédé de fonctionnement d'un dispositif d'impression Download PDF

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Publication number
EP2860036A1
EP2860036A1 EP20130004852 EP13004852A EP2860036A1 EP 2860036 A1 EP2860036 A1 EP 2860036A1 EP 20130004852 EP20130004852 EP 20130004852 EP 13004852 A EP13004852 A EP 13004852A EP 2860036 A1 EP2860036 A1 EP 2860036A1
Authority
EP
European Patent Office
Prior art keywords
printing
print heads
workpiece
extension axis
print
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
EP20130004852
Other languages
German (de)
English (en)
Other versions
EP2860036B1 (fr
Inventor
Drexler Stefan
Frank Martin
Osswald Steffen
Schulz Joachim
Weber Joachim
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
Original Assignee
Hinterkopf 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 Hinterkopf GmbH filed Critical Hinterkopf GmbH
Priority to PL13004852T priority Critical patent/PL2860036T3/pl
Priority to ES13004852T priority patent/ES2768283T3/es
Priority to EP13004852.3A priority patent/EP2860036B1/fr
Priority to ES14000308.8T priority patent/ES2661382T3/es
Priority to EP14000308.8A priority patent/EP2868477B1/fr
Priority to PL14000308T priority patent/PL2868477T3/pl
Publication of EP2860036A1 publication Critical patent/EP2860036A1/fr
Application granted granted Critical
Publication of EP2860036B1 publication Critical patent/EP2860036B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • 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
    • 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
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles

Definitions

  • the invention relates to a printing device for printing on a peripheral surface of an article, having at least two print heads, each having at least one row of Farbdosierianan, especially ink nozzles, which are each formed for an individual predetermined delivery of color to the object. Furthermore, the invention relates to a printing machine and a method for operating a printing device.
  • a printing device for printing on the surface of a three-dimensional object comprising an ink jet printing system with a plurality of circumferentially adjacent to each other at a fixed distance arranged individual print heads, which can be moved during the execution of the printing operation along an axis of rotation for the object to be printed to a helical Allowing printing of the article, wherein a pitch between adjacent nozzles of the individual print heads is greater than a resolution of the image to be applied to the printed image and wherein the desired resolution is achieved by the helical printing of the article.
  • the object of the invention is to provide a printing device, a printing press and a method for operating a printing device, with which a particularly efficient printing of a high-resolution object is made possible.
  • At least one of the print heads is arranged movably along an extension axis of the ink metering elements on a print head carrier and that the movably mounted print head is assigned an electrically controllable setting device for setting a relative position relative to the at least one further print head.
  • the print head has a plurality of ink dosing elements arranged along an extension axis, wherein each of the ink dosing elements is designed for individual dispensing of color particles or drops of ink, in particular ink droplets.
  • the Farbdosierieri are arranged at a constant pitch along the extension axis, so that each adjacent Farbdosierieri have a constant distance from each other.
  • the along the extension axis arranged Farbdosieretti form a print line, wherein a print head can be equipped with one or alternatively with multiple print lines, wherein a plurality of print lines are preferably arranged parallel to each other and with the same distance.
  • the electrically controllable adjusting device which may be, for example, an electric linear direct drive, an electric spindle drive or a belt or cable drive
  • a relative movement of a first print head relative to a second print head is made possible.
  • This relative movement can influence which position the ink metering elements of the first print head occupy along the extension axis relative to the ink metering elements of the second print head.
  • the Farbdosierimplantation the first print head are offset with respect to the extension axis by an amount relative to the Farbdosier instituten the second print head, which corresponds to 50 percent of the pitch of the Farbdosieretti.
  • an adjustment of the position of the ink metering elements to print tracks can be achieved which have different slopes due to different requirements for the resolution of the print image to be generated and / or due to different diameters of the articles to be printed .
  • an adjustment of the pitch for the helical print track must be achieved, depending on the desired resolution for the print image to be generated and depending on the diameter of the article, which is achieved by adjusting the relative position of the print heads by relative movement the extension axis can be guaranteed to each other.
  • a change in the resolution of the printed image along the extension axis can also be provided during the execution of a printing operation, in addition or as an alternative, for example It is of interest if partial areas of the print image are to be generated with a higher resolution than other areas of the print image.
  • the object to be printed relative to the printing device performs a relative movement, which is aligned at least substantially, in particular exactly, transversely to the extension axis of the Farbdosieriata.
  • This relative movement of the object relative to the printing device may in particular be a pure translational movement, a pure rotational movement or an overlay of a translational movement and a rotational movement.
  • a helical printing of the article is provided, which is optionally by a, in particular synchronous, translational movement of the printheads along the extension axis with exclusive rotation of the article or by a superimposed rotational and translational movement of the article relative to the stationary printheads or by a combination of a superimposed rotational and translational movement of the article with a, in particular synchronous, translational movement of the print heads along the extension axis can be performed. It can be provided that the relative position of the print heads along the extension axis to each other depending on the achievable resolution and / or the diameter of the article before the implementation of the printing process is set and maintained during the execution of the printing operation.
  • the at least one further print head in particular all other print heads, are connected to an electrically controllable adjustment device and movable along the extension axis of the Farbdosierieri is arranged on the print head carrier.
  • each of the print heads in particular also during the execution of a printing operation for an object, can be adjusted with regard to its positioning along the extension axis of the ink metering elements.
  • the image to be printed on the peripheral surface of the object to be printed has, for example, a print area with low expansion and high image resolution along the extension axis and surrounding print areas with greater expansion and lower image resolution along the extension axis, then it can be provided that the print heads are used to generate the print area high resolution relative position to each other, which differs from a relative positioning of the printheads to produce the low-resolution printing areas.
  • the print heads are aligned parallel to each other and transverse to the extension axis of the Farbdosieriata immediately adjacent, in particular slidably adjacent to each other, are arranged.
  • the juxtaposed Farbdosieriata the adjacent printheads are each aligned parallel to each other and transverse to the extension axis, in particular with respect to a circumferential direction of the printing Item, arranged at a fixed distance from each other.
  • it may also be provided to make a spacing of the print heads transversely to the extension axis adjustable by suitable adjustment means.
  • it may be provided to arrange at least one print head rotatably mounted about a pivot axis, wherein the pivot axis is preferably aligned parallel to the extension axis, so that an incident direction for the color particles emitted by the print head, in particular ink drops, can be adjusted to the outer surface of the object. This is of particular interest when articles with very different diameters are to be printed with the same printing device.
  • the printheads by means of at least one adjustment between a first functional position in which the Farbdosieriana adjacent printheads are arranged transversely to extension axis overlapping, and a second functional position in which an overlap of Farbdosierierin adjacent printheads transversely to extension axis present, are adjustable.
  • a first functional position in which the Farbdosierimplantation adjacent printheads are arranged transversely to extension axis overlapping
  • a second functional position in which an overlap of Farbdosierettin adjacent printheads transversely to extension axis present
  • At least part of the ink metering elements of the first print head lie on the same parallel lines as at least part of the ink metering elements of the second print head.
  • a higher print resolution along the extension axis can be achieved than and the areas without overlap. This is especially true in the event that each surface area of the object to be printed is only passed over once by the printheads.
  • At least one print head comprises at least two rows of color metering elements aligned parallel to the extension axis, in particular as ink nozzles.
  • the at least two rows of Farbdosierierin along the extension axis each have the same pitch for the Farbdosier sculpture.
  • the Farbdosierimplantation adjacent rows relative to the extension axis by a predetermined amount, in particular by a fraction of the respective pitch offset from each other.
  • adjacent rows of Farbdosierettin for dispensing different colors, especially cyan, magenta and yellow (yellow) provided are.
  • the respective print head can generate the entire associated image section of the print image during a printing process, whereby depending on the printing method used, in particular when using the inkjet printer process, predictable mixing of the colors emitted by the different ink dosing elements occurs.
  • the Farbdosieretti along the extension axis are arranged in a predetermined pitch and that the adjustment is designed for positioning of the print head with a positioning accuracy, the smaller, preferably less than 50 percent, preferably less than 25 percent, more preferably less than 10 percent, in particular less than two percent, the pitch of the Farbdosierieri along the extension axis.
  • the respective printhead can be arranged in a reproducible manner relative to adjacent printheads, for example, to allow for different resolutions and different printing speeds for the printing of the article during the execution of a printing operation.
  • the setting device has a positioning accuracy of less than 5 micrometers and that a pitch of the ink metering elements is in a range of 0.25 millimeters.
  • each group of print heads comprises at least one, in particular two, print heads.
  • the peripheral surface of an article may optionally be rotated as part of a single rotation, or possibly only a partial rotation be printed with high resolution in the circumferential direction and / or along the extension axis, for which purpose the two groups of print heads are arranged at least partially overlapping each other.
  • the peripheral surface of the article may be provided to print the peripheral surface of the article in the course of several revolutions, for which no or only a slight overlap of the groups of printheads is provided and the printheads of the adjacent groups of printheads are adjusted to each other in dependence on the desired slope of the print track , It is preferred that the respective groups of printheads are each designed to dispense a single color.
  • the printhead support is assigned a drying station arranged opposite the printheads, in order to allow drying of the applied ink following the application of ink.
  • a curing process is carried out for the color particles or drops of color emitted by the ink dosing elements onto the surface of the object to be printed.
  • a contactless energy coupling for example by infrared light or ultraviolet light, is preferably provided on the object.
  • Such a drying or curing process is particularly advantageous when the article is an at least substantially rotationally symmetric article which is rotated during the printing operation about an axis of rotation which is aligned at least substantially parallel to the extension axis of the print heads.
  • the surface area of the object to be printed first passes the printing head (s) in order to pass through the drying station in the further course of its rotation, so that ideally within approximately a rotational movement of approximately 200 degrees around the axis of rotation of the printing process for the object can be completed completely.
  • the drying station is coupled to a cleaning station for the print heads and is supported in a relatively movable manner on the print head carrier, optionally allowing drying of the ink application on the objects or cleaning of the print heads.
  • the task of the cleaning station may optionally be to perform a print head cleaning in mechanical contact with the printheads or to pick up and bind color particles or drops of paint emitted as part of a cleaning process for the ink metering elements.
  • Cleaning of the printhead (s) may be provided if appropriate printing errors are detected on printed articles by suitable sensor means or if a certain number of printing operations have been performed.
  • the cleaning station is designed such that the printhead to be cleaned is sealed at an edge region and then in the free jet emitted by the printhead in the direction of the cleaning station color particles, in particular ink drops, can be collected and removed.
  • the object of the invention is achieved according to a second aspect with a printing machine according to claim 10.
  • the printing machine comprises a machine frame, on which a workpiece rotary table is rotatably mounted, with a workpiece rotary table associated drive unit for a particular freely definable, rotational positioning of the workpiece turntable and with workpiece holders for receiving objects to be printed, wherein the workpiece holders protrude in the radial direction of the workpiece rotary table and are each mounted rotatably on the workpiece rotary table, and with at least one, in particular in at least one spatial direction movable relative to the Maschinen Swissrundtisch movably mounted, printing device according to one of claims 1 to 9.
  • a rotation axis of the Maschinen Swissrundtischs is aligned in the vertical direction, so that the workpiece holders in at least Substantially horizontal direction.
  • the at least one printing device can be arranged on the machine frame in such a way that a color output from the print heads onto the object takes place essentially in the vertical direction, in particular downwards.
  • the drive unit assigned to the workpiece rotary table is preferably designed such that it allows a freely selectable positioning of the workpiece holders. In this way, for example, to perform a cleaning operation for the print heads, an intermediate position can be approached, in which the workpiece receivers between two adjacent work stations, in particular printing units, are positioned. In such an intermediate position unwanted contamination of the objects to be printed are avoided during the execution of the cleaning process.
  • the workpiece holders are designed as spindles for receiving sleeve-shaped objects and / or that each spindle is assigned its own drive means for initiating a freely definable rotational movement relative to the workpiece rotary table and / or that the workpiece holders with a heating device for heating the objects received thereon are formed.
  • the printing machine for printing aerosol can blanks or tube blanks provided and therefore has rod-shaped workpiece receptacles, which are also referred to as spindles. It is advantageous if each spindle has its own drive device is assigned to optionally allow control of the rotational movement of the object to be printed in dependence on the requirements of the printed image and the relative positioning of the print heads to each other.
  • the printheads as inkjet printheads which are designed for the delivery of ink droplets on the peripheral surface of the article during the execution of the printing operation, it is advantageous if already during or at least shortly after the execution of the printing operation, a heating of the article can be made to accelerate a hardening of the ink drops.
  • the object of the invention is achieved according to a third aspect with a method according to claim 12.
  • This method is used to operate a printing device comprising a plurality of mutually parallel and electrically relative to each other relatively movable printheads, wherein at least one of the printheads is associated with an adjusting device for initiating a relative movement relative to at least one further printhead and wherein at least one workpiece holder for a rotatable mounting of an of its peripheral surface to be printed on the article, comprising the steps of: placing an object on the workpiece holder, performing a relative movement between at least two printheads for influencing an axial resolution of a printed image to be applied to the peripheral surface, rotating the article by means of the workpiece holder about an axis of rotation parallel to one another to a Extending axis of Farbdosier instituten the printheads is aligned so that the peripheral surface passes through the printheads, dispensing paint on the peripheral surface of the article by a predetermined control of the Farbdosier institute.
  • the at least two print heads can be set in the circumferential direction and in the direction of the extension axis along the extension axis in their relative position relative to one another as a function of achievable resolutions for the print image.
  • a diameter of the article to be printed may be included in determining and adjusting the relative positioning of the printheads to each other.
  • the rate of delivery of the ink dosing elements of the printheads is also selected depending on the resolution to be achieved and the diameter of the article.
  • additional electrical adjustment means may be provided for a particularly synchronous, automatable movement of the printheads adapted to maintain a spacing of the printheads from the peripheral surface of the object constant.
  • An advantageous distance between the print head and the peripheral surface is in a range of less than 5 mm, preferably less than 3 mm, in particular less than 2 mm.
  • additional electrical adjustment means for a, in particular synchronous, pivoting movement of the print heads can be provided about a pivot axis, wherein the pivot axis is aligned at least substantially normal to the axis of rotation of the objects. With such a pivoting movement, an additional degree of freedom for influencing the resolution of the printed image to be generated by the print heads can be made available.
  • Subject is made a synchronous movement of the print heads along the axis of rotation and / or that by means of the adjusting means during the rotation of the object, a relative movement of the print heads is performed parallel to the extension axis to make a compensation of printing errors.
  • a helical track of pressure points on the peripheral surface of the article can be generated by the respective Farbdosierieri, preferably a proportional, in particular constant relationship between the rotational movement of the article about its axis of rotation and the movement of the print heads along the extension axis is provided.
  • a rotational speed of the workpiece holder is detected and a dispensing rate for a color output by the Farbdosierieri is adapted to the determined rotational speed.
  • Another, not claimed aspect of the invention relates to a printing machine with a machine frame on which a workpiece rotary table is rotatably mounted, with a workpiece rotary table associated drive unit for a predetermined rotary positioning of the workpiece rotary table and with workpiece holders for receiving to be printed Objects, wherein the workpiece holders are each rotatably mounted on the workpiece rotary table, and with drive means for the workpiece holders and at least one printing device, in particular according to claims 1 to 9 and a cleaning station, which is at least temporarily opposite to the printing device.
  • the drive unit for the workpiece turntable is, as in the other claimed embodiments of the printing press, adapted to allow a rotational stepping movement of the workpiece turntable comprising a sequence of rotation steps and stoppage phases.
  • the rotational steps are dimensioned during a printing phase for the objects to be printed so that the recorded on the workpiece receptacles objects in successive steps of the workpiece turntable, which are always performed in particular with the same angular pitch, respectively opposite to each other to adjacent workstations are arranged to then in processed appropriately, in particular to be printed on printing devices.
  • the drive means for the workpiece rotary table approach an intermediate position in which the objects received on the workpiece holders are not arranged opposite to the work stations.
  • a rotation step for such an intermediate position is half an angular separation of a usual during the execution of the printing operation rotation step.
  • a relative movement of the cleaning station in the direction of the respective printing device can be undertaken.
  • This relative movement serves, for example, the cleaning station by a translational movement parallel to an axis of rotation of the workpiece rotary table to approach the printing device such that a sealing contact between the cleaning station and the printheads of the printing device can be achieved.
  • the respective print head can be cleaned by targeted delivery of color particles, in particular ink droplets, or, if appropriate, a solvent flows through them. It is provided that the color particles or the solvent are taken up and removed by the cleaning station.
  • the cleaning station is designed for dispensing solvent onto the print heads in order to effect a dissolution of ink particles adhering to the print heads, in particular ink drops.
  • the cleaning station is transferred to a position in which a collision-free further movement of the objects recorded on the workpiece receptacles can be performed by a rotary step movement until reaching the next workstation to then resume the usual processing sequence for the objects.
  • One in the FIG. 1 illustrated printing machine 1 comprises a rotatably mounted about a rotation axis 2 on a machine frame not shown workpiece rotary table 3 and a plurality, each pairwise mounted on the workpiece rotary table workpiece holders 4.
  • the workpiece holders 4 are individually rotatably mounted with rotational drive axes 5 not shown drive means and for receiving sleeve-shaped , in particular as aerosol can blanks or tube blanks formed, at least substantially cylindrical objects 6 are provided.
  • the workpiece holders 4 are formed as mandrels on which the hollow body, in particular as unilaterally closed hollow cylinder, formed, 6 objects can be plugged.
  • a plurality of work stations 8 to 18 are arranged, which transported to a processing and / or testing of Objects 6 are formed. Since it is in the view according to the FIG. 1 is a plan view and the workstations 9 to 17 are usually arranged in the vertical direction above the workpiece holders 4, the workstations are shown 9 to 17 only in dashed lines.
  • the work station 8 is a loading station, on which the cylindrical objects 6 are exemplarily in pairs on the workpiece holders 4 by a suitable transport device 19, which is coupled to a conveying system, not shown for the cylindrical objects 6, are pushed.
  • a rotary position of the cylindrical objects 6 is determined at the work station 9 by a first optical scanning of the cylindrical objects 6, for example to ensure a correct rotational alignment of the cylindrical objects 6 for a printing operation taking place at the workstation 10.
  • This is particularly important if the surface to be printed on the objects is provided with features that are to be in a predetermined manner with the applied print image in a predetermined manner. These features may be, for example, local embossing and / or embossing in and / or out of the surface of the article 6 and / or pre-printed areas, which in turn are to serve as a primer for the subsequent printing.
  • It can preferably be provided to print on a partially reshaped or already completely reshaped article, which in particular embosses and / or embossments, so that an orientation of the printed image with respect to the deformed areas and not, as it was known from practice, a Deformation of the objects is carried out on the basis of a pre-applied printed image. It is preferably provided to print a deformed aerosol can blank with indentations and / or shapes locally or over its entire circumferential surface, wherein the aerosol can blank after printing in the printed areas with a protective coating, in particular a transparent varnish, can be coated and then ready for a filling.
  • a protective coating in particular a transparent varnish
  • the workstation 10 includes an example in the Figures 2 . 3 . 5 , and 7 closer to printing station 21, at which the cylindrical objects 6 during rotation about respective axes of rotation 5 using printheads 22, 23, as shown in the Figures 3 . 5 and 7 are shown in more detail, are printed in a predetermined range.
  • the work station 14 is embodied as an inspection device by way of example and makes it possible to determine a print quality of the print image applied by the printing station 21 to the peripheral surface of the object 6.
  • the further workstations 11 to 13 and 15 to 17 are used for further processing of the cylindrical objects 6, for example for applying a protective lacquer to the printing or for mounting components to the objects 6.
  • At the workstation 18 takes place an unloading process, in which the cylindrical objects 6 are withdrawn by means of a transport device 20 of the mandrel-like workpiece holders 4 and fed to a not shown further transport system.
  • the workpiece turntable 4 performs the stepwise processing of the cylindrical objects 6 at the respective workstations 8 to 18 a rotational step movement by the angle W, in which the paired workpiece holders 4 from one of the respective workstation 8 to 18 opposite position in one of the following Workstation 8 to 18 opposite position to be transported, wherein the rotational step movement as a sequence of acceleration from standstill, a deceleration from the achieved target speed and a subsequent downtime takes place.
  • a non-illustrated drive for the workpiece rotary table 3 is designed such that the acceleration and deceleration of the workpiece rotary table 3 are completely freely adjustable over a wide range and downtime and adapted to the requirements of processing the respective cylindrical objects 6 at the workstations 8 to 18 can be.
  • the drive of the workpiece rotary table 3 can be controlled such that the workpiece holders 4 in an intermediate step, which can be used for cleaning or other maintenance of workstations 8 to 18, by a rotational step movement with the step size W / 2 between the workstations 8 to 18 come to rest, as shown schematically in the FIG. 1a is shown. This is important, for example, for carrying out a cleaning of the printing station 21.
  • the in the Figures 2 and 3 illustrated printing station 21 includes two mirror images of each other arranged pressure means 24, 25 for the sake of clarity in the FIG. 3 only one of two printable with the printing station 21 cylindrical objects 6, in contrast, in the FIG. 2 both arranged opposite to the printing station 21 and rotatably mounted cylindrical objects 6 shown.
  • Each printing device 24, 25 comprises, by way of example, in each case two printing heads 22, 23, each of which has a strip-like shape, and, on its end face 26, 27 facing the cylindrical article 6, an exemplary nozzle row 28, 29 is formed.
  • Each of the rows of nozzles 28, 29 comprises several, preferably in the same pitch or spacing along an extension axis 30, exemplified as nozzles 31 formed Farbdosieriana.
  • Each of the nozzles 31 in the nozzle rows 28, 29, as shown in the FIGS. 4 . 6 and 8th are shown in section, is exemplarily individually controlled and formed in the illustrated embodiment for dispensing drops of ink.
  • the two print heads 22, 23 are designed to deliver a first color, in particular the color cyan.
  • further printing stations 32, 33 for dispensing a second or third color, in particular the color magenta and the color yellow (yellow) are formed.
  • a printed image can be produced by a combination of differently colored ink drops which are dispensed onto the object 6 at the respective printing stations 21, 32, 33.
  • more than three printing stations are provided in order to apply a larger number of colors, especially white as at least partially applied primer for the printing and / or a transparent topcoat for the carried out printing on the article 6.
  • the respective printheads for dispensing a plurality of colors in particular the colors cyan, magenta and yellow, formed so that a printing of an object can be done in a single printing operation.
  • a resolution of a printed image that is to say a minimum distance between the centers of adjacently arranged ink drops, can be different Spatial directions are influenced in different ways.
  • each nozzle 31 of each print head 22, 23 can be driven at a predetermined frequency and can deliver drops of ink onto the peripheral surface of the object 6 at the predetermined frequency.
  • the frequency determines the resolution in the circumferential direction. At a low rotational speed results in a high resolution in the circumferential direction, at high rotational speed results in a low resolution in the circumferential direction.
  • a resolution for the printed image in a spatial direction parallel to the axis of rotation 5 is determined based on a print head 22 or 23 exclusively by the pitch of the nozzles 31 along the extension axis 30 of the respective print head 22, 23, as long as during the execution of the printing process no translational displacement of the respective Printhead 22, 23 along the axis of rotation 5 takes place. In this case, an annular application of the ink drops takes place on the peripheral surface of the article 6.
  • the result is a helical application of the ink droplets on the peripheral surface of the object 6, with a slope of one generated thereby Spiral path for the ink drops determines the distance between adjacent helix.
  • a resolution of the printed image in the direction along the axis of rotation 5 is determined. This can be used, in particular for the case that the object 6 passes through the respective print head 22, 23 several times, to a considerable increase in resolution along the extension axis 30.
  • the respective printing device 24, 25 is set in a suitable manner.
  • the two printing heads 22, 23 of the respective printing device 24, 25 each associated with an electric drive 34, 35, which is electrically connected to a control device 36, respectively.
  • the drive 34, 35 is an example of an electric motor whose drive shaft, not shown, with a rotatably and fixedly mounted in serving as a print head carrier pressure device 24, 25 threaded spindle 37, 38 is connected.
  • non-visible lock nut which is designed to implement a rotational movement of the threaded spindle 37, 38 in a translational movement of the respective print head 22, 23.
  • 25 sliding guide surfaces 39, 40, 41, and 42 are provided which a sliding movable and non-rotatable mounting the printheads 22, 23 on the printing device 24, 25 allow.
  • the control device 36 is designed for an independent control of the electrical drives 34, 35, so that the translational position of the print heads 22, 23 along the extension axis 30 can be adjusted freely.
  • the print heads 22, 23 for generating a helical print track is indicated by the parallel and equidistant lines on the object 6, positioned by means of adjusting means serving as drives 34, 35 to each other such that the in the FIG. 4 shown nozzles 31 of the adjacent print heads 22, 23 are each on the parallel and mutually equidistant lines.
  • Such an adjustment and synchronized use of the printheads 22, 23 can achieve a doubling of the resolution for the print image over a use of only one printhead 22 or 23 in a helical printing operation.
  • the spacing of the lines depends on the desired resolution, the number of revolutions of the object 6 during the printing process with respect to the printheads 22, 23 and the diameter of the object 6.
  • the print heads 22, 23 can be arranged offset by half the pitch t to each other and remain stationary during the simple rotation of the article 6.
  • a further increase in resolution can be achieved if the object 6 makes several turns relative to the two print heads 22, 23 and the print heads 22, 23 during the rotational movement of the article 6 to perform the printing operation are shifted synchronously with each other along the extension axis 30, thereby obtaining a helical shape for a trace of printing dots discharged from a nozzle 31 on the peripheral surface of the article 6, in which the successively generated Pressure traces of the individual nozzles significantly less than a pitch t apart from each other are applied to the article 6.
  • the synchronous displacement of the printheads 22, 23 during the printing operation is selected so that a slope of the track of printing dots during one revolution of the object corresponds to a value obtained by dividing the pitch t of the nozzles 31 of a printhead 22 or 23 along the axis of extent 30 corresponds to an integer value.
  • the two print heads 22, 23 with the respective drives 34, 35 are exemplarily set such that they along the track of Pressure points are arranged offset to one another such that they lie on mutually parallel and equidistant lines and that this position of the print heads 22, 23 is also maintained during the execution of the printing operation.
  • the two print heads 22, 23 are not only moved synchronously to the extension axis during the execution of a printing operation but also moved relative to each other.
  • it may be provided to print the peripheral surface of the article 6 with different resolutions.
  • both the relative position of the print heads 22, 23 along the extension axis 30 and a change in the rotational speed of the object 6 and / or a drive frequency for the control of the print heads 22, 23 are provided.
  • an increase in resolution for the print image in the circumferential direction can be achieved by reducing the rotation speed for the object 6 while maintaining the drive frequency for driving the print heads 22, 23 and / or the drive frequency for driving the print heads 22, 23 is increased.
  • the printing device 24, 25 connected to the control device 36 is adjusted in response to the detection of printing errors in the generated print image by the inspection system in the workstation 14 for compensation of these printing errors at the next article to be printed .
  • the two print heads 22, 23 are positioned relative to one another in such a way that a nozzle 31 of one of the print heads 22, 23 can be used to deliver a clogged nozzle 31 of the other print head 22, 23.
  • the intact nozzle 31 does not necessarily have to be arranged on the same track of pressure points, in particular a helical path, like the defective nozzle 31, even a slight offset which is smaller than the pitch t may possibly be acceptable.
  • FIGS. 4 and 5 It is shown how a printing of a high-resolution object 6 in the direction of the extension axis 30 is made, the extent of which along the extension axis 30 is greater than a corresponding extent of the print heads 22, 23.
  • the printing process begins by way of example with a positioning of the two print heads 22, 23 in a lower starting position according to FIG FIG. 3 in which the print heads 22, 23 corresponding to the slope of the intended spiral pressure taking into account the desired Resolution are arranged. Starting from this positioning, the print heads 22, 23 are moved synchronously to one another during the execution of the printing process along the extension axis 30 and the object 6 is rotated about the rotation axis 5 until the entire peripheral surface of the object 6 has been moved past the print heads 22, 23 and with Color could be provided.
  • a helical printing of the peripheral surface of the article 6 is provided with a resolution along the extension axis 30, which is greater than the pitch t of the nozzles 31 to the printheads 22, 23.
  • a multiple rotation of the article 6 with respect to the print heads 22, 23 is provided, during which the print heads 22, 23 are moved synchronously with each other along the extension axis 30 to produce the desired helical shape for the print tracks.
  • the last nozzle 31 of the printhead 22 arranged as an example below would be arranged at the pitch t with respect to the first nozzle 31 of the printhead 23 arranged as an example above, this would result in an offset of the print tracks of the adjacent printheads relative to the desired pitch for the helical printing of the object 6 22, 23 by the amount ds.
  • the two print heads 22, 23 are shifted by a resolution-dependent and diameter-dependent amount relative to each other, so that the Amount ds disappears.
  • seamless printing of the peripheral surface of the article 6 can be realized.
  • a functional module 43 is arranged opposite the respective printing device 24, 25.
  • the functional module 43 comprises a cleaning station 44 and a drying station 45, which by way of example on a common, rotatable about a perpendicular to the plane of the FIGS. 9 and 10 aligned rotational axis 46 mounted pivot receptacle 47 are mounted.
  • the cleaning station 44 is equipped with an absorbent material, not shown, which can receive a large amount of dye, in particular ink, discharged from the print heads 22, 23 during the execution of a cleaning cycle.
  • the workpiece rotary table 3 is controlled such that the respective workpiece holders 4 in the in the FIG. 1a illustrated intermediate position between two workstations 9 to 17 are arranged so that no interfering objects between the print heads 22, 23 and the respective cleaning station 44 are arranged.
  • the pivot receptacle 47 is pivoted about the pivot axis 46, so that the cleaning station 44 is removed from the print head 22 or 23 and the drying station 45 reaches the print head 22 or 23 opposite position.
  • the drying station 44 is preferably an arrangement of light sources not shown in detail, in particular light-emitting diodes. These light sources are designed to emit light of a predeterminable intensity and wavelength, these properties being based on the properties of the color to be cured or ink discharged from the respective printheads 22, 23 onto the object.
  • a further workstation in particular the workstation 15, is equipped with a further printing station 48, which is responsible for applying a closed or selective, in particular transparent, topcoat to the peripheral surface of the object 6, in particular to the printing stations 21 , 32 and 33 printed areas, are formed and which has the same structure as one of these printing stations 21, 32, 33.
  • the in the FIG. 11 illustrated printing station 50 is provided for a multi-color printing of the article 6 in a printing operation and has for this purpose three printheads 51, 52 and 53, each having three nozzle strips 54, 55 and 56. Each of the three nozzle strips 54, 55 and 56 is provided for the discharge of a color, in particular from the group cyan, magenta and yellow.
  • Each of the print heads 51, 52, and 53 can be positioned in the same way along the extension axis 30 by means of an associated drive 57, 58, 59 and a respective associated threaded spindle 60, 61, 62, as for the printing stations 21, 32, 33 the case is.
  • the arrangement of print heads 51, 52, and 53 of the printing station 50 can be tilted relative to the axis of rotation 5 of the workpiece holder 4 by means of a drive 63, which comprises a transmission device, not shown.
  • the tilting direction is selected such that a distance from the print heads 51, 52 and 53 relative to the object 6 remains at least substantially constant.
  • a drive 64 with not shown Transmission device provided which allows a displacement of the print heads in the radial direction in order to keep a controlled or regulated adjustment of a radial distance between the print heads 51, 52 and 53 and the object 6 at least substantially constant.
  • the drives 63 and 64 can be provided in the same way also at the printing stations 21, 32 and 33, if there is a controlled or controlled adaptation to different geometries of objects 6 is required.
  • the cleaning station 66 together with the drying station 67 is accommodated on a movably mounted carriage 68.
  • the cleaning station 66 has a receptacle, not shown, which is provided at an upper, the printheads 22, 23 facing edge region with a circumferential elastic sealing means 69.
  • the carriage 68 is designed for carrying out two mutually perpendicular translational movements 70, 71 and for this purpose with drive means, not shown, for example, electric or pneumatic drives equipped.
  • the translational movement 70 which is preferably carried out transversely to the axis of rotation 2 of the workpiece rotary table 3, serves to selectively arrange the cleaning station 66 or the drying station 67 below and opposite to the print heads 22, 23.
  • the translational movement 71 which is preferably carried out parallel to the axis of rotation 2 of the workpiece rotary table 3, serves to seal the cleaning station 66 in sealing To bring contact with the printheads 22, 23. This allows the desired cleaning cycle to be carried out.
  • the workpiece rotary table 3 is controlled such that the respective workpiece holders 4 in the in FIG. 1a represented intermediate position between two work stations 9 to 17 are arranged so that no interfering objects between the printheads 22, 23 and the respective cleaning station 66 are arranged.
  • the cleaning station 66 is removed from the printheads by means of the translatory movements 70 and 71 such that the drying station 67 reaches a position opposite the printhead 22, 23 and activates ink applied by the printheads 22, 23 to the object 6 , hardened or dried.
  • a translational movement of the object to be printed in particular provided parallel to its axis of rotation.
  • a rotation of the print heads around the stationary or translationally moving object is provided around.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)
EP13004852.3A 2013-10-09 2013-10-09 Dispositif d'impression, imprimante et procédé de fonctionnement d'un dispositif d'impression Active EP2860036B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL13004852T PL2860036T3 (pl) 2013-10-09 2013-10-09 Urządzenie drukujące, maszyna drukarska i sposób eksploatacji urządzenia drukującego
ES13004852T ES2768283T3 (es) 2013-10-09 2013-10-09 Equipo de impresión, máquina de impresión y procedimiento para el funcionamiento de un equipo de impresión
EP13004852.3A EP2860036B1 (fr) 2013-10-09 2013-10-09 Dispositif d'impression, imprimante et procédé de fonctionnement d'un dispositif d'impression
ES14000308.8T ES2661382T3 (es) 2013-10-09 2014-01-28 Impresora para imprimir cuerpos huecos abiertos al menos por un lado y procedimiento para hacer funcionar una impresora
EP14000308.8A EP2868477B1 (fr) 2013-10-09 2014-01-28 Presse pour l'impression de corps creux ouverts au moins sur un côté et procédé de fonctionnement d'une presse
PL14000308T PL2868477T3 (pl) 2013-10-09 2014-01-28 Maszyna drukarska do zadrukowywania korpusów wydrążonych, otwartych przynajmniej z jednej strony i sposób eksploatacji maszyny drukarskiej

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EP13004852.3A EP2860036B1 (fr) 2013-10-09 2013-10-09 Dispositif d'impression, imprimante et procédé de fonctionnement d'un dispositif d'impression

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EP2860036B1 EP2860036B1 (fr) 2019-12-04

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EP14000308.8A Active EP2868477B1 (fr) 2013-10-09 2014-01-28 Presse pour l'impression de corps creux ouverts au moins sur un côté et procédé de fonctionnement d'une presse

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DE102014225256A1 (de) * 2014-12-09 2016-06-09 Krones Ag Verfahren und Vorrichtung für den Tintenstrahldruck auf Behälter
EP3088189A1 (fr) 2015-04-30 2016-11-02 HINTERKOPF GmbH Dispositif d'impression et procédé d'impression d'un objet d'impression
DE102015215224A1 (de) * 2015-08-10 2017-02-16 Krones Ag Behälterbehandlungsmaschine und Verfahren zur Bedruckung von Behältern
WO2017025219A1 (fr) * 2015-08-10 2017-02-16 Krones Ag Machine de traitement de contenants et procédé d'impression de contenants
WO2017040097A1 (fr) * 2015-08-31 2017-03-09 The Procter & Gamble Company Appareil à mouvement parallèle pour déposer une substance sur des articles
WO2017040096A1 (fr) * 2015-08-31 2017-03-09 The Procter & Gamble Company Procédé de déplacement parallèle permettant de déposer une substance sur des articles
DE102016107087A1 (de) * 2016-04-18 2017-10-19 Till Gmbh Verfahren und Vorrichtung zum digitalen Bedrucken von 3-dimensionalen Objekten
EP3348410A1 (fr) 2017-01-17 2018-07-18 HINTERKOPF GmbH Ébauche de boîtier et procédé d'usinage pour un corps creux
DE102017215433A1 (de) * 2017-09-04 2019-04-04 Krones Ag Direktdruckmaschine zum Aufbringen einer Druckschicht auf Behälter
EP3473446A1 (fr) 2017-10-17 2019-04-24 HINTERKOPF GmbH Machine d'impression numérique à table ronde et imprimante
US20190193422A1 (en) * 2016-09-30 2019-06-27 Omso - Officina Macchine Per Stampa Su Oggetti - Società Per Azioni Machine for the ink-jet printing of three-dimensional objects, tubular objects in particular
NL2020542B1 (nl) * 2018-03-07 2019-09-13 B A T Holding B V Printinrichting alsmede werkwijze voor het printen op een manteloppervlak van een rotatiesymmetrisch voorwerp
CN111806097A (zh) * 2020-07-21 2020-10-23 北京美科艺数码科技发展有限公司 一种喷墨打印装置及其翻面模式打印方法
CN115027143A (zh) * 2022-06-24 2022-09-09 王功庆 一种圆柱体侧表面uv印刷设备

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DE102014225256A1 (de) * 2014-12-09 2016-06-09 Krones Ag Verfahren und Vorrichtung für den Tintenstrahldruck auf Behälter
EP3088189A1 (fr) 2015-04-30 2016-11-02 HINTERKOPF GmbH Dispositif d'impression et procédé d'impression d'un objet d'impression
DE102015215224A1 (de) * 2015-08-10 2017-02-16 Krones Ag Behälterbehandlungsmaschine und Verfahren zur Bedruckung von Behältern
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WO2017040096A1 (fr) * 2015-08-31 2017-03-09 The Procter & Gamble Company Procédé de déplacement parallèle permettant de déposer une substance sur des articles
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US20190193422A1 (en) * 2016-09-30 2019-06-27 Omso - Officina Macchine Per Stampa Su Oggetti - Società Per Azioni Machine for the ink-jet printing of three-dimensional objects, tubular objects in particular
EP3348410A1 (fr) 2017-01-17 2018-07-18 HINTERKOPF GmbH Ébauche de boîtier et procédé d'usinage pour un corps creux
DE102017215433A1 (de) * 2017-09-04 2019-04-04 Krones Ag Direktdruckmaschine zum Aufbringen einer Druckschicht auf Behälter
EP3681724B1 (fr) * 2017-09-04 2024-05-29 Krones AG Machine d'impression directe pour l'application d'une couche d'impression sur des récipients
EP3473446A1 (fr) 2017-10-17 2019-04-24 HINTERKOPF GmbH Machine d'impression numérique à table ronde et imprimante
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NL2020542B1 (nl) * 2018-03-07 2019-09-13 B A T Holding B V Printinrichting alsmede werkwijze voor het printen op een manteloppervlak van een rotatiesymmetrisch voorwerp
CN111806097A (zh) * 2020-07-21 2020-10-23 北京美科艺数码科技发展有限公司 一种喷墨打印装置及其翻面模式打印方法
CN115027143A (zh) * 2022-06-24 2022-09-09 王功庆 一种圆柱体侧表面uv印刷设备

Also Published As

Publication number Publication date
EP2868477A1 (fr) 2015-05-06
ES2768283T3 (es) 2020-06-22
EP2860036B1 (fr) 2019-12-04
PL2868477T3 (pl) 2018-06-29
PL2860036T3 (pl) 2020-08-24
ES2661382T3 (es) 2018-03-28
EP2868477B1 (fr) 2017-12-20

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