EP3113955B1 - Module d'impression, procédé d'impression et dispositif d'impression - Google Patents

Module d'impression, procédé d'impression et dispositif d'impression Download PDF

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Publication number
EP3113955B1
EP3113955B1 EP15707950.0A EP15707950A EP3113955B1 EP 3113955 B1 EP3113955 B1 EP 3113955B1 EP 15707950 A EP15707950 A EP 15707950A EP 3113955 B1 EP3113955 B1 EP 3113955B1
Authority
EP
European Patent Office
Prior art keywords
printing
pressure
container
module
inlet
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
EP15707950.0A
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German (de)
English (en)
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EP3113955A1 (fr
Inventor
Franziska Peinze
Olaf Dressel
Werner Van De Wynckel
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.)
Bundesdruckerei GmbH
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Bundesdruckerei GmbH
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Publication of EP3113955A1 publication Critical patent/EP3113955A1/fr
Application granted granted Critical
Publication of EP3113955B1 publication Critical patent/EP3113955B1/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
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems

Definitions

  • the invention relates to a printing module for printing on a carrier body, a method for printing and a printing device.
  • the invention relates to a printing module, a method for printing and a printing device for printing a carrier body of a value and / or security document.
  • carrier bodies in particular card-shaped carrier bodies, in particular in order to provide information and / or security features on or in the carrier body.
  • carrier bodies in particular card-shaped carrier bodies, in particular in order to provide information and / or security features on or in the carrier body.
  • Previously known is the printing of individual films, in particular plastic films, wherein the printed film and further films are then laminated to form a laminate.
  • the DE 10 2008 012 425 A1 discloses a printing device for producing security and / or value printing pieces.
  • the printing device includes a printing device coupled to a reservoir.
  • the reservoir is disposed in a pressurized fluid ejection direction behind the printing device, the printing device forming a print head. If the pressure ejection direction is parallel to a gravitational direction, that is to say a direction of the gravitational force, it follows that the reservoir is arranged above the printhead.
  • a power supply fails in such an arrangement or if an unforeseen shutdown occurs, it is possible for the pressurized fluid, in particular ink, to flow from the reservoir and lines from the reservoir to the print head due to the gravitational force and run out of nozzles of the print head there. As a result, a carrier to be printed body can be damaged in an undesirable manner. Also, other parts of the printing device, such as parts of a transport device soiled by such leaking pressurized fluid and impaired in their functionality.
  • the US 2012/0268507 A1 discloses an ink jet printer including an ink circulation path, a first tank, a second tank, and a pump first and second detectors for detecting a liquid surface in the first and second tanks, an ink supply, a supplemental supply valve, a control unit, a storage unit, and a determination unit.
  • the US 2012/268507 A1 discloses an ink jet printer having an ink circulation path, a first tank, a second tank, a pump, first and second liquid surface detectors, an ink supply unit, an inlet valve controller, a storage unit, and a determining unit.
  • the US 2011/199407 A1 describes an image forming technique with an inkjet system for emitting a liquid, such as ink from a head, and for forming an image on a medium.
  • the GB 2 447 919 A discloses a continuous ink jet printer and printheads for such as well as methods of operating the ink jet printers.
  • the EP 0 714 779 A2 discloses an inkjet printing device for printing on clothing.
  • the WO 2006/075314 A2 discloses an ink jet printer and method of operating ink jet printers.
  • a printing module for printing on a carrier body, in particular a carrier body of a security and / or security document.
  • the carrier body may in particular be a card-shaped carrier body, which in particular has a predetermined thickness.
  • the card body may in particular be made of plastic, more particularly of PVC.
  • the support body may denote the substrate to be printed.
  • a value and / or security document may be any document that is a physical entity that is protected against unauthorized production and / or corruption by security features or elements.
  • Security features are features that distort and / or duplicate at least make it difficult to make a simple copy. Physical entities that include or form a security feature may be referred to as security features.
  • a security document may include multiple security features and / or security elements. For the purposes of the definition defined herein, a security document also always constitutes a security element. Examples of security documents, which also include value documents representing a value, include, for example, passports, identity cards, driver's licenses, identity cards, access control cards, health insurance cards, banknotes, postage stamps, bank cards, credit cards , Smart cards, tickets and labels.
  • the printing module comprises at least one print head and at least one first container.
  • the first container is in this case a container for a pressure fluid or a pressure fluid, in particular for ink, wherein the pressure module is used for printing the carrier body with the pressure fluid.
  • the printhead has a printhead inlet and at least one nozzle, preferably a plurality of nozzles.
  • the pressure fluid can be ejected towards the carrier body and thus emerge from the print head.
  • the ejection may in this case be actorgeSpec, wherein e.g. a predetermined amount of pressurized fluid may be expelled from the at least one nozzle by appropriate actuation of one or more actuators from the nozzle. As a result, e.g. Pressure fluid drops are generated.
  • Various methods can be used for ejecting a quantity of pressurized fluid from the at least one nozzle, for example the known bubble jet technique or, preferably, a piezo-assisted method, wherein pressurized fluid is at least caused by deformation of elements due to an electrical variable or its change a nozzle is pressed.
  • the at least one nozzle in this case has a Düsenauslassraum. This may, for example, be oriented along a central longitudinal axis of the nozzle and be oriented away from the print head.
  • the nozzle outlet direction denotes a direction in which the printing fluid is ejected from the print head toward the carrier body.
  • the nozzle outlet direction may also be referred to as the printing direction.
  • the printhead has a printhead outlet.
  • the print head may also be referred to as a flow print head.
  • printing fluid may flow into the printhead through the printhead inlet with a portion of the printing fluid being expelled from the printhead through the at least one nozzle for printing the substrate in the nozzle outlet direction and the remaining portion of the printing fluid flowing out of the printhead through the printhead outlet ,
  • the at least one nozzle and the printhead outlet may thus form different apertures of the printhead through which print fluid may exit the printhead.
  • a flow resistance of the at least one nozzle may be greater than a flow resistance of the at least one print head outlet.
  • the printhead outlet is connected to the first container, in particular fluidically.
  • the first container can also be referred to as a collecting container.
  • an inlet of the further container may be fluidly connected to the printhead outlet.
  • At least a part of the first container is arranged in the nozzle outlet direction in front of the at least one print head outlet, in particular with a predetermined spacing.
  • at least a part of the first container may be arranged in front of the at least one nozzle.
  • the first container may be arranged and / or configured such that, irrespective of a level of the first container, a surface of the pressurized fluid in the first container is arranged in the nozzle outlet direction in front of the at least one print head outlet, in particular in front of the at least one nozzle.
  • Having at least a portion of the first container in the nozzle outlet direction disposed in front of the at least one printhead outlet means that the at least one portion of the first container is disposed below the at least one printhead outlet when the pressure module is positioned and / or aligned such that the nozzle outlet direction is one Gravitational direction, that is, a direction of the gravitational force corresponds.
  • the at least one part of the first container in particular the inlet of the first container, or a rear end side of the container in the nozzle outlet direction can be arranged at a predetermined distance along the nozzle outlet direction from the at least one print head outlet.
  • the predetermined distance may also be referred to as the height difference between the first container and the print head.
  • first containers can also be arranged and / or formed such that a minimum distance along the Düsenauslassraum between the surface of the pressurized fluid in the first container and the at least one Druckkopfauslass or at least one nozzle is given regardless of a level of the first container.
  • the predetermined distance along the nozzle outlet direction is greater than 0 mm.
  • the predetermined distance is greater than 10mm, more preferably greater than 20mm.
  • the predetermined distance may also be 50mm.
  • the pressure fluid can flow through the printhead and out of the printhead via at least one fluidic connection element, for example a line or a hose, into the first container.
  • the predetermined distance is here in particular to be chosen such that at least a portion of the between the printhead outlet and the first container, e.g. in a fluidic connection element existing pressure fluid due to a force acting on this part of the pressurized fluid gravitational force in the first container and not in the printhead, in particular in the event that the power supply of the printing module fails and thus the pressurized fluid can not be promoted as desired.
  • This pressure fluid flowing into the first container can generate a negative pressure in the print head such that the pressure fluid in the print head is conveyed out of the print head, in particular toward the first container. Also located in the flow direction in front of the pressure module pressure fluid can be sucked in this way by the print head in the first container. This advantageously reduces this Risk that pressurized fluid escapes through the at least one nozzle and thus undesirably affects a printed image.
  • the pressure module may further comprise at least one first device for generating a fluid flow, in particular a conveying device, for example a pump device.
  • a fluid flow through the print head with desired properties for example a desired flow rate
  • the fluid flow may be adjusted at a predetermined flow rate or volume rate, for example, in a range of 50 ml / min to 150 ml / min, preferably 80-100 ml / min.
  • connection between the printhead outlet and the first container may be part of a closed fluid circuit, wherein the fluid circuit connects the printhead and the at least first container.
  • the printing module comprises at least one first pressure generating device.
  • a predetermined pressure for example an overpressure or a negative pressure, in particular relative to an atmospheric pressure, can be generated.
  • a pressure can be set at least in the first container.
  • a vacuum in the first container can be generated by means of the first pressure generating device.
  • a predetermined pressure level for example a predetermined overpressure or a predetermined negative pressure, in particular relative to an atmospheric pressure, can be set by means of the first pressure-generating device.
  • the first pressure generating device additionally a pressure in another container adjustable.
  • the first pressure-generating device can be coupled to both the first and the further container.
  • suitable controls, such as valves include, by means of which, preferably independently, the pressure in the first and in the other container can be adjusted by the pressure generator.
  • the printing module comprises a further pressure-generating device.
  • the further pressure-generating device can also generate an overpressure or a negative pressure, in particular relative to an atmospheric pressure. Further, by means of the further pressure generating device, a pressure in another container is adjustable.
  • the further container can be referred to here as a reservoir and will be explained in more detail below.
  • the pressure in the first container may be adjustable independently of the pressure in the further container.
  • a certain pressure difference can be set between the pressures in the first and in the other container. This can be set constant in time or variable in time.
  • a higher pressure in the further container than in the first container is adjustable.
  • the pressure difference provided thereby between the further and the first container can advantageously generate and / or support the previously explained fluid flow through the print head.
  • the difference between the pressure in the further container and the pressure in the first container may be adjusted to provide a predetermined pressure difference between a pressure at the printhead inlet and a pressure at the printhead outlet. This will be explained in more detail below.
  • the first and / or the further pressure-generating device can in this case provide the device explained above for generating a fluid flow or one or more further devices for generating a fluid flow.
  • the pressure module comprises at least one inlet device for introducing additional pressurized fluid.
  • additional pressurized fluid means an amount of pressurized fluid which may be introduced into the fluid system in addition to the pressurized fluid present in the fluid system, which fluid system may include the first reservoir, the printhead, and optionally the further reservoir, and the corresponding fluidic connection elements.
  • the inlet device is connectable to the inlet of the first container.
  • the inlet device can also be connectable to other parts or elements of the fluid system.
  • the pressure module may comprise a fluid switching element, wherein by means of the fluid switching element, either the inlet device with the inlet of the first container or the Druckkopfauslass is connectable to the inlet of the first container.
  • the pressure module may comprise a fluid switching element, wherein by means of the fluid switching element either the printhead outlet or the inlet device with the inlet of the first container or both the inlet device and the Druckkopfauslass is connectable to the inlet of the first container.
  • a fluid switching element can be designed, for example, as a valve, in particular as a shuttle valve.
  • the pressure fluid can be introduced through the inlet device without additional insertion pressure.
  • the printing module additionally has the other one Container on.
  • the printhead is connected via the printhead inlet with the other container, in particular fluid technology.
  • At least one part of the further container may be arranged in the nozzle outlet direction in front of the at least one printhead outlet and / or in front of the at least one printhead inlet, in particular at a predetermined distance.
  • at least part of the further container may be arranged in front of the at least one nozzle.
  • the further container may be arranged and / or formed such that, independently of a level of the further container, a surface of the pressurized fluid in the further container in the Düsenauslassraum before the at least one Druckkopfauslass and / or the at least one printhead inlet, in particular in front of the at least one Nozzle, is arranged.
  • the first and the further containers may be arranged equidistantly in the nozzle outlet direction in front of the at least one printhead inlet and / or in front of the at least one printhead outlet.
  • the further container can be referred to here as a reservoir.
  • pressure fluid from the further container for example by means of the above-explained at least one device for generating a fluid flow
  • the first container and the further container are fluidly connectable.
  • an inlet of the further container can be fluidly connected to an outlet of the first container.
  • the first and the further containers can be fluidly connected or can be connected via a separating device, for example a valve, wherein the separating device can establish or separate the fluidic connection between the first and the further container.
  • the pressure module can have a further device for generating a fluid flow, in particular a further conveying device, for example a pumping device, wherein pressurized fluid can be conveyed from the first container into the further container by means of the further device for generating a fluid flow.
  • a further conveying device for example a pumping device
  • the pressure module comprises at least one inlet device for introducing additional pressurized fluid.
  • additional pressurized fluid means an amount of pressurized fluid which may be introduced into the fluid system in addition to the pressurized fluid present in the fluid system, which fluid system may include the first reservoir, the printhead, and optionally the further reservoir, and the corresponding fluidic connection elements.
  • the inlet device is connectable to the inlet of the further container.
  • the inlet device can also be connectable to other parts or elements of the fluid system.
  • the pressure module may comprise a fluid switching element, wherein by means of the fluid switching element, either the inlet device with the inlet of the first container or the Druckkopfauslass is connectable to the inlet of the first container.
  • the pressure module may comprise a fluid switching element, wherein by means of the fluid switching element either the printhead outlet or the inlet device with the inlet of the first container or both the inlet device and the Druckkopfauslass is connectable to the inlet of the first container.
  • a fluid switching element can be designed, for example, as a valve, in particular as a shuttle valve. This advantageously results in that the pressurized fluid can be replenished into the fluid system.
  • the pressure fluid can be introduced through the inlet device without additional insertion pressure.
  • the pressure module comprises at least one pressure sensor for detecting a fluid pressure in the fluid system.
  • the at least one pressure sensor may detect a fluid pressure at the printhead inlet or at the printhead outlet.
  • the pressure module may comprise two pressure sensors, wherein a first pressure sensor detects the fluid pressure at the printhead inlet and a further pressure sensor detects the fluid pressure at the printhead outlet.
  • a desired fluid pressure in particular a desired pressure difference between the printhead inlet and the printhead outlet.
  • the desired fluid pressure or the desired fluid pressure difference may, for example, be selected such that a fluid flow with desired properties, for example a desired flow rate, is generated by the printhead.
  • the pressure module may include a control device, wherein the control device controls the at least one device for generating a fluid flow in the fluid system in dependence on the fluid pressure detected by the at least one pressure sensor such that a fluid flow with desired flow parameters is generated.
  • the control device can control the previously explained first pressure-generating device and / or the further pressure-generating device and / or the devices explained above for generating a fluid flow.
  • the pressure module may also comprise a further control device which controls the previously explained discharge of pressurized fluid through the at least one nozzle.
  • the printing module has a first section and a further section.
  • the sections may in particular designate housing sections, which in particular have a housing interior.
  • the further section is arranged at a predetermined angle obliquely to the first section.
  • the angle is in particular greater than 0 ° and less than 180 °.
  • a central longitudinal axis, in particular a central axis of symmetry, of the first section with a central longitudinal axis, in particular a central axis of symmetry, of the further section encloses the predetermined angle.
  • the first portion may be arranged perpendicular to the further portion.
  • the first section may extend along the central longitudinal axis of the first section and the further section may extend along the central longitudinal axis of the further section.
  • the central longitudinal axis of the further section may be oriented parallel to the nozzle outlet direction.
  • the further portion may extend away from the first portion in the nozzle outlet direction.
  • the at least one print head is arranged in or on the first section and the at least first container is arranged in or on the further section.
  • the further container can also be arranged in or on the further section.
  • the printing module in particular a housing of the printing module, L-shaped or substantially L-shaped.
  • the at least one printhead and in or on the further leg of the L-shaped printing module can be arranged at least the first container.
  • the printing module has at least one receiving device for at least one supporting element.
  • a receiving device may for example be a fastening device, wherein the fastening device denotes a device for producing a mechanical connection of a printing module with the support element.
  • the mechanical connection is in particular a releasable mechanical connection.
  • the mechanical connection can form a and / or non-positive connection.
  • latching connections, clamping connections, screw connections and other, in particular detachable, mechanical connections are conceivable.
  • a receiving device may be an alignment device, wherein an alignment device may designate an element for producing a predetermined position and / or orientation.
  • an alignment device may be formed as a guide hole or contact surface or notch.
  • the pressure module has the at least one support element.
  • the at least one support element may be attached to the printing module, in particular a housing of the printing module.
  • the support element may be movable, in particular pivotable, attached to the pressure module.
  • the at least one support module can be arranged on the printing module in such a way that the printing module, in particular stably, can be deposited on a, in particular flat, settling surface.
  • the pressure module can be deposited on the shoulder surface in such a way that the nozzle outlet direction has at least one portion which is oriented perpendicular to the settling surface.
  • the nozzle outlet direction in the settled state is oriented completely perpendicular to the settling surface.
  • the at least one support element can be arranged on the pressure module such that at least a part of the first container, preferably the entire first container, is arranged in the nozzle outlet direction in the stepped-down state in front of the at least one print head outlet.
  • the printing module may have a plurality of receiving devices for a plurality of supporting elements or have a plurality of supporting elements.
  • the pressure module can advantageously be removed from a pressure device and stored securely by means of the at least one support element, whereby the described embodiment further advantageously results in pressurized fluid being able to flow out of the print head into the first container even in the stepped-down state and not undesirably exiting through the at least one nozzle.
  • the printing module has at least receiving element for receiving the printing module on a carrier device, wherein the printing module by means of the at least one receiving element in a predetermined position and / or can be fastened and / or aligned with the carrier device with a predetermined orientation.
  • the carrier device can also have or form (corresponding) receiving elements for fastening and / or alignment of the printing module. This will be explained in more detail below.
  • the predetermined position and / or orientation can be determined relative to a reference coordinate system of the carrier device, in particular of the pressure device containing the carrier device.
  • a receiving element may for example be a fastening element, wherein a fastening element designates an element for producing a mechanical connection of a printing module with the carrier device.
  • the mechanical connection is in particular a releasable mechanical connection.
  • the mechanical connection may be a positive and / or non-positive connection. It is conceivable, e.g. Locking connections, clamping connections, screw connections and other, in particular detachable, mechanical connections.
  • a receiving element may be an alignment element, wherein an alignment element may designate an element for producing a predetermined position and / or orientation.
  • an alignment element may be formed as a guide pin or contact surface or notch.
  • the carrier device may in particular be a carrier device of a printing device.
  • the printing module can be arranged in an advantageous manner with a predetermined position and / or orientation in the printing device.
  • a calibration requirement in particular when replacing the printing module, can be reduced or completely avoided.
  • the pressure module may have a threaded bore and the carrier device has a corresponding through-hole, whereby the pressure module can be screwed to the carrier device.
  • both the printing module, in particular the housing of the printing module, and the carrier device can have abutment surfaces which abut one another during fastening and thus ensure a desired alignment of the printing module relative to the carrier device.
  • first and / or the further container of the printing module can respectively insert another connection for fresh air supply into the containers.
  • the first and / or further container can / can be permanently installed in the printing module or exchangeable.
  • a position of the first container and / or of the further container can be adjustable in a direction parallel to the nozzle outlet direction.
  • the containers can be movably mounted.
  • the first container and / or the further container can only be movable to predetermined, discrete positions or else continuously parallel to the nozzle outlet direction, wherein the container can be fixed to the pressure module after the movement.
  • the position of the first and / or the further container can also be adjusted in an actuator-supported manner.
  • the pressure module can comprise one or more control devices, in particular for controlling the fluid flow and / or for controlling the printing process, in particular the pressure fluid discharge from the at least one nozzle.
  • a pressure module may include a display device and / or an operating device, for example for displaying a fill level of the first and / or the further container.
  • further information such as status messages and / or error messages can be displayed by means of the display device.
  • the printing module can have at least one communication interface, for example a wired or wireless communication interface. Via the communication interface, the printing module, in particular a control device of the printing module, can communicate with a superordinate control device. For example, print data can be transmitted to the print module. Furthermore, a printing module can also have at least one memory device for printing data.
  • a printing module for example, a base color of an RGB color space be applicable. Also, by means of a printing module, a base color from a CMYK color space can be applied. Also, by means of a printing module, a spot color or a functional color can be applied. Further, a paint can be applied by means of a printing module. Furthermore, a material for generating a volume hologram can also be applied by means of a printing module.
  • a pressure fluid in particular from another container, flows through a printhead inlet into at least one printhead, wherein a portion of the pressure fluid is expelled to the carrier body through at least one nozzle in a Düsenauslassraum from the printhead, wherein the pressure fluid, in particular the remaining part of the pressure fluid , flows through a printhead outlet into a first container.
  • at least a part of the first container preferably the entire first container, is arranged in the nozzle outlet direction in front of the at least one print head outlet.
  • the method can be carried out by means of a device, in particular a printing module, according to one of the previously explained embodiments.
  • the device, in particular the printing module according to one of the previously explained embodiments, be designed such that a method according to the described embodiments by the device, in particular the printing module, executable.
  • the nozzle outlet direction may in this case be oriented in particular perpendicular to a flow direction of the pressure fluid in the print head.
  • the proposed method advantageously results in pressure fluid from the print head also flowing in the event of a sudden pressure drop, for example due to a failure of a power supply, to the first container. This reduces the risk of unwanted leakage of pressurized fluid through the at least one nozzle, which in turn does not inadvertently exit the printing fluid from the printhead, e.g. can run on conveyor belts and / or other components of the printing device.
  • the printing module can be fastened and / or aligned on a carrier device with a predetermined position and / or orientation.
  • that can Pressure module are fixed and / or aligned such that the Düsenauslassraum is equal to the direction of gravity.
  • a predetermined pressure difference is set between a pressure at the printhead inlet and a pressure at the printhead outlet.
  • a desired meniscus pressure that is to say a pressure at the at least one nozzle, can be set in an advantageous manner.
  • a predetermined pressure in the first container and / or a predetermined pressure in the other container can be adjusted. These can, for example, be adjusted such that the desired pressure difference results at the print head.
  • a pressure at the printhead inlet is adjusted in response to a desired meniscus pressure and / or a distance between the at least one printhead outlet and the first container in the nozzle outlet direction.
  • the pressure at the printhead inlet can be adjusted in particular as a function of a distance, in particular a minimum, average or maximum distance, between the first container, in particular a surface of the pressurized fluid in the first container, and the printhead outlet or the at least one nozzle.
  • a fill level that is to say a position of the surface of the pressure fluid, of the first and / or of the further container, can be detected here, in particular sensory.
  • a pressure module can have at least one device for detecting a fill level.
  • the pressure at the printhead inlet is adjusted in response to a desired pressure differential between printhead inlet pressure and printhead outlet pressure.
  • a desired property of a fluid flow through the print head can be set.
  • the pressure at the printhead inlet and at the printhead outlet are detected, wherein the pressure in the first and / or further container is set such that a desired pressure at the printhead inlet and / or printhead outlet and / or a desired pressure difference exists.
  • This has the advantage that pressures are metrologically easy to detect and the level of the container has no direct influence.
  • the pressure at the printhead inlet can be adjusted in particular by a pressure in another container.
  • the pressure in the further container may be adjusted to provide a desired pressure at the printhead inlet.
  • the pressure at the printhead inlet should be provided such that in a normal printing operation the desired meniscus pressure can be provided, with the negative pressure due to the distance between the at least one printhead outlet and the first container being due to the pressure fluid present in the printhead acts, is compensated.
  • the above-explained pressure difference between the pressure at the printhead inlet and the pressure at the printhead outlet may be adjusted to provide a desired flow rate, such as 80-100 ml / min, through the printhead.
  • a desired flow rate such as 80-100 ml / min
  • other flow rates can be set, in particular flow rates depending on desired operating parameters of the print head.
  • pressurized fluid can be introduced through an inlet device into the fluid system, in particular into the first container and / or into the further container. Furthermore, pressurized fluid can be conveyed from the first container into the further container, for example during printing pauses.
  • a printing device for printing a carrier body, in particular a carrier body of a value and / or security document.
  • the printing device comprises at least one carrier device and at least one printing module according to one of the previously described embodiments. Furthermore, the printing module is fastened to the carrier device with a predetermined position and / or orientation.
  • the carrier device may in particular be arranged stationary relative to a foundation or a storage surface of the printing device.
  • the support means may in particular denote a set of elements which, as explained in more detail below, for receiving, in particular for fastening and alignment, of Serve pressure modules.
  • the carrier device has receiving elements for fastening and / or alignment of at least one printing module, preferably a plurality of printing modules, or forms such receiving elements. The receiving elements have already been explained above.
  • the printing device may have at least one positioning device for positioning the carrier body, wherein the receiving elements are arranged and / or configured such that the positioning device is movable relative to at least one pressure module attached to the carrier device.
  • the positioning device can in particular be a movable positioning device.
  • the positioning device can enable a movement in at least one spatial direction.
  • the positioning device can furthermore be, in particular, an XY displacement table, which makes it possible to move the carrier body in two mutually perpendicular spatial directions. Again, these directions may be oriented perpendicular to the previously discussed nozzle outlet direction.
  • the proposed printing device may comprise a plurality of printing modules arranged in particular in a predetermined order along one of the moving directions of the positioning device, for example one printing module per primary color of the RGB color space, one printing module per primary color of the CMYK color space and one printing module per a desired spot color ,
  • the printing device may comprise further functional modules, which may also be attached to the support means and / or aligned.
  • the carrier device can extend in a spatial direction.
  • the carrier device may have, for example, a predetermined length.
  • the carrier device can be designed as a carrier rail, C-profile, T-profile or L-profile extending in one spatial direction.
  • the above-explained receiving positions in particular a predetermined number of receiving positions, can be provided by the receiving elements.
  • the printing or functional modules are along this spatial direction, in particular with a predetermined order and / or with predetermined distances to the next in the spatial direction next printing or function module on the Carrier device attachable. The distances may be the same or different.
  • the spatial direction may be, for example, a first spatial direction, wherein the first spatial direction may be, for example, parallel to a direction of movement of the previously explained positioning device.
  • the length may in this case be greater than a width of the carrier device, for example a width in a second spatial direction, wherein the second spatial direction may be parallel to a further direction of movement of the previously explained positioning device, for example.
  • a functional module can be designed, for example, as a heating module.
  • a heating module may in this case comprise a device for generating thermal energy.
  • thermal energy can be transferred to the value and / or security document (to be produced), for example to dry a freshly applied pressure fluid.
  • the functional module can be designed as a radiation module, in particular as a UV (ultraviolet) radiation module.
  • the value and / or security document (to be produced) can be irradiated, in particular with radiation having a predetermined wavelength range, for example a UV wavelength range. This may be necessary, for example, to harden a lacquer applied, for example by means of a printing module.
  • the functional module can be designed as a surface pretreatment module.
  • a functional module can, for example, use plasma or corona to process a surface of the carrier body.
  • the surface property of the substrate to be printed can be adjusted specifically.
  • the carrier body may designate a substrate to be processed, in particular also a substrate to be printed.
  • the printing device can be designed in particular as a so-called desktop printer, which has a compact design.
  • the printing device in this case advantageously allows the printing of carrier bodies for the production of value and / or security documents, wherein advantageously a space requirement is substantially reduced due to the lack of need for a laminating device.
  • the pressure device can of course have a housing, wherein the at least one carrier device and the at least one pressure module can be arranged in the housing.
  • the housing may have a lid,
  • a hinged lid to remove a print module from the housing and to bring back into the housing can.
  • a schematic cross section through a printing device 1 is shown.
  • the printing device 1 comprises a carrier device 2, in particular a stationarily arranged carrier device 2.
  • the carrier device 2 has, in particular, a first receiving section 4 extending in the vertical direction z and a further receiving section 5 extending in a lateral direction y, the first and the further Receiving portion 4, 5 are connected at a free end of the first receiving portion 4 via a connecting portion 6 which extends obliquely to the first and further receiving portion 4, 5 and with these each a predetermined angle, for example 45 °, includes.
  • the carrier device 2 has a further support arm 7, which is fastened to the first receiving portion 4 and extends substantially in the lateral direction y away from the first receiving portion 4.
  • a sliding carriage 8 is movably mounted, wherein the sliding carriage 8 in and against the lateral direction y and in and against a longitudinal direction (not shown) is movable.
  • the longitudinal direction can here be oriented perpendicular to the lateral direction y and to a vertical direction z.
  • the vertical direction z is oriented in the direction of gravity, the direction of gravitation corresponding to a direction of the gravitational force g.
  • the vertical direction z is oriented from top to bottom.
  • a carrier body 9 is arranged, in particular a card-shaped carrier body 9, which is printed by the printing device 1.
  • the carrier body 9 is movable relative to a print head 10 of a printing module 11.
  • the printing module 11 is in this case attached to the carrier device 2 with a predetermined orientation and position.
  • the pressure module 11 has a substantially L-shaped housing 12 with a first portion 13 and a further portion 14, wherein a central longitudinal axis of the first portion 13 is oriented perpendicular to a central longitudinal axis of the further portion 14.
  • the central longitudinal axis of the first section 13 is oriented parallel to the lateral direction y and the central longitudinal axis of the further section 14 parallel to the vertical direction z.
  • a side surface of the further portion 14 of the housing 12 abuts against a side surface of the first receiving portion 4 of the carrier device 2.
  • another portion of an underside of the first portion 13 of the housing 12 rests on a surface of the further receiving portion 5.
  • a side surface of a connecting portion between the first portion 13 and the other portion 14 of the housing 12 abuts on a side surface of the connecting portion 6 of the carrier 2.
  • the pressure module 11 comprises a first container 15 for pressurized fluid DF (see Fig. 4 ). Further, the printing module 11 includes the print head 10. Not in Fig. 1 is shown another container 16 of the printing module 11 (see, eg Fig. 2 ).
  • the printhead 10 has a printhead inlet 17 and a printhead outlet 18.
  • the printhead outlet 18 is fluidly connected via a hose 19 to an inlet 20 of the first container 15. Further, the printhead inlet 17 is above a Hose 19 with an outlet 21 of the other container 16 fluidly connected. Also shown is an inlet 22 of the first container 15 for fresh air.
  • the print head 10 further has nozzles 23 through which the printing fluid DF in a nozzle outlet direction corresponding to the vertical direction z is ejected from the print head 10 toward the carrier body 9.
  • the first container 15, in particular the inlet 20 of the first container 15, is arranged in the nozzle outlet direction z in front of the at least one print head outlet 18, in particular also in front of the nozzles 23.
  • a distance between the inlet 20 and the printhead outlet 18 may be determined as a distance A between top end surfaces of the inlet 20 and the printhead outlet 18.
  • the first container 15 and in particular the pressure fluid DF located in the first container 15 is arranged at a lower height level than the pressure fluid DF located in the print head 10.
  • an energy supply device of the printing module 11, in particular of pressure generating devices 24, 25, fails, at least part of the pressure fluid DF located in the hose 19 between the print head outlet 18 and the inlet 20 of the first container 15 flows into the pressure vessel 15 due to the distance or height difference. At the same time, however, the pressure fluid DF still contained in the print head 10 is sucked out of the print head 10 and thus transported away. In addition, the still existing in the hose 19 between the outlet 21 of the further pressure vessel 16 and the printhead inlet 17 pressure fluid DF can be sucked by the print head 10 in the direction of the first container 15.
  • printhead inlet 17, printhead outlet 18, inlet 20 of the first container and / or the outlet 21 of the further container 16 may be dimensioned such that a flow resistance of these elements is less than a flow resistance of the nozzles 23.
  • the pressurized fluid DF is not out of the Outlet nozzles 23, but flow into the first container 15. This advantageously prevents undesired escape of pressure fluid DF from the nozzles 23.
  • the pressure module 11 comprises a first pressure generating device 24, which is coupled to the first container 15 and a first pressure p0 (see Fig. 4 ) in the first container 15 can generate. Furthermore, the pressure module 11 comprises a further pressure-generating device 25, which is coupled to the further container 16 and by means of which a further pressure p1 (see Fig. 4 ) is adjustable in the further container 16.
  • the pressure module comprises a first pressure sensor 26 and a further pressure sensor 27, wherein by means of the first pressure sensor 26, a pressure at the print head inlet 17 and by means of the further pressure sensor 27, a pressure at the print head outlet 18 can be detected.
  • the printing module 11 comprises a control device 28, which is connected in terms of data and / or signaling with the pressure generating devices 24, 25, the pressure sensors 26, 27 and with the print head 10.
  • the control device 28 can control the pressure generating devices 24, 25 such that a desired pressure difference between pressure at the printhead inlet 17 and pressure at the printhead outlet 18 is adjusted and, in particular at the printhead inlet 17, a desired absolute pressure is set.
  • the printing module 11 comprises a display device 29, which may also be connected to the control device 28 in terms of data and / or signaling.
  • a display device 29 On the display device 29, for example, status messages of the print module 11, e.g. a level of one of the containers 15, 16, information about a color or type of the printing fluid DF or an error message are displayed.
  • the printing module 11 comprises a communication interface 30, which may also be connected to the control device 28 in terms of data and / or signaling.
  • a perspective view of a printing module 11 is shown. It is shown that the printing module 11 includes a printhead 10 having a printhead inlet 17 and a printhead outlet 18. It is also shown that the printing module 11 comprises a first container 15 and a further container 16. Also shown is an inlet 20 of the first container 15 and an outlet 21 of the further container 16.
  • the further container 16 also includes an inlet 31 for fresh air. It is further shown that the first container 15 has an outlet 32, which can be fluidly connected to an inlet 33 of the further container 16. As a result, pressurized fluid DF (see Fig. 4 ) are conveyed from the first container 15 into the further container 16. In Fig. 2 are fluidic connections, for example via hoses 19 (see Fig. 1 ) not shown.
  • Fig. 2 is further shown that a side surface of the first portion 14 of the printing module 11 receiving openings 34 for support feet 35 (see Fig. 3 ) having. At least a part of a support foot 35 can be inserted into the receiving openings 34, wherein the pressure module 11 by means of the support feet 35 on a Absetz phenomenon 36 (see Fig. 3 ) deductible and stable storage is.
  • a guide pin 37 is provided, which can be inserted into a corresponding recess of the support means 2, in particular in the first receiving portion 4, whereby the printing module is attached to the support means 2 and aligned.
  • screws through through holes in the support means 2, in particular through through holes in the region of the first receiving portion 4 and the connecting portion 6, are performed and engage in the threaded holes 38.
  • FIG. 2 shows a schematic side view of a pressure module 11 in the supported state.
  • support feet 35 are inserted into receiving openings 34.
  • the receiving openings 34 may in this case also be formed as threaded bores, wherein the support feet 35 may be screwed into the receiving openings 34.
  • the support feet 35 have spherical sections 39.
  • the support feet 35 are attached to the printing module 11 permanently, in particular movably.
  • the Abstweilfchipe 35 For example, have a telescopic mechanism to pull out and / or be pivotally attached to the printing module 11. To settle these trained as Abstützfbiee support elements can then be pulled out and / or unfolded.
  • the support feet 35 allow storage of the printing module 11 such that even in the remote state, the first container 15 can be arranged in the direction of gravity in front of a Druckkopfauslass 18 of the print head 10. In the stepped-down state, the pressure module 11 can also be set down on the settling surface 36 with one end face of the further section 14.
  • Fig. 4 shows a schematic fluid circuit diagram of a printing module 11 of the invention. Shown is a housing 12 of the printing module 11, which, as already explained above, a first portion 13 and a further portion 14 has.
  • a print head 10 is arranged, the nozzle 23, wherein printing fluid DF through the nozzles 23 in a Düsenauslassraum z, in particular droplets, can be ejected from the print head 10.
  • a first container 15, a further container 16 for pressurized fluid DF and an air tank 40 are arranged.
  • a printhead outlet 18 is fluidly connected to an inlet 20 of the first container 15.
  • a two-way valve is arranged, via which the inlet 20 of the first container 15 either with the printhead outlet 18 or a refilling device (not shown) for refilling of pressurized fluid DF is connectable.
  • FIG. 15 Schematically illustrated is a surface of the pressurized fluid DF in the first container 15, whereby a level of the first container 15 is fixed.
  • the surface of the pressurized fluid DF in the first container 15 is arranged in the nozzle outlet direction z with a further distance A2 in front of the nozzles 23 of the print head 10 and thus also in front of the print head outlet 18, the further distance A2 being greater than that in FIG Fig. 1 shown distance A between the inlet 20 and the Druckkopfauslass 18.
  • the inlet 20 of the first container 15 is arranged in the nozzle outlet z in front of the nozzles 23.
  • the inlet 20 of the first container 15 and the surface of the pressurized fluid DF, regardless of the level, are arranged in the nozzle outlet direction z in front of the printhead outlet 18.
  • An outlet 32 of the first container 15 is fluidly connected to an inlet 33 of the further container 16. Shown is a conveyor 41 via the pressurized fluid DF via this fluidic connection from the first container 15 in the other container 16 is conveyed.
  • FIG. 1 Schematically illustrated is a surface of the pressurized fluid DF in another container 16, whereby a level of the other container 16 is fixed. It is shown that the surface of the pressure fluid DF in the further container 16 in the nozzle outlet direction z is also arranged at the further predetermined distance A2 in front of the nozzles 12 of the print head 10. Of course, however, the containers 15, 16 may also have different levels.
  • the inlet 33 of the further container 16 is arranged in the nozzle outlet direction z in front of the nozzles 23.
  • both the inlet 33 of the further container 16 and the surface of the pressurized fluid DF are arranged in the nozzle outlet direction z in front of the printhead outlet 18.
  • An outlet 21 of the further container 16 is fluidly connected to the printhead inlet 17 via a filter element 42.
  • a first pressure p0 is set, wherein in another container 16, a further pressure p1 is set.
  • the pressures p1, p0 in the containers 15, 16 are chosen in particular such that a predetermined pressure difference is set between the printhead inlet 17 and the printhead outlet 18.
  • the first pressure p0 can be in particular a vacuum.
  • atmospheric pressure can prevail in the air reservoir 40.
  • pressure sensors 26, 27 which detect a pressure at the printhead inlet 17 and a pressure at the printhead outlet 18. Depending on the detected pressures, in particular a pressure difference between the detected pressures, the pressures p0, p1 in the containers 15, 16 can be regulated.
  • both a further inlet 22 of the first container 15 and a further inlet 31 of the further container 16 are connected to the air tank 40.
  • conveying devices 45 are provided, via which air from the air tank 40 into the respective container 15, 16 can be conveyed.

Landscapes

  • Ink Jet (AREA)

Claims (11)

  1. Module d'impression pour l'impression d'un corps de support (9), en particulier d'un corps de support (9) d'un document de valeur et/ou de sécurité, dans lequel le module d'impression (11) comprend au moins une tête d'impression (10) et au moins un premier récipient (15), dans lequel l'au moins une tête d'impression (10) présente une entrée de tête d'impression (17) et au moins une buse (23),
    dans lequel la tête d'impression (10) présente une sortie de tête d'impression (18) et est reliée au premier récipient (15) par le biais de la sortie de tête d'impression (18), dans lequel au moins une partie du premier récipient (15) est agencée dans une direction de sortie de buse (z) en amont de l'au moins une sortie de tête d'impression (18), dans lequel le module d'impression (11) comprend au moins un premier dispositif de génération de pression (24), dans lequel une pression est réglable au moins dans le premier récipient (15) au moyen du premier dispositif de génération de pression (24),
    caractérisé en ce que
    une pression est réglable en outre dans un autre récipient (16) au moyen du premier dispositif de génération de pression (24) et/ou que le module d'impression (11) comprend un autre dispositif de génération de pression (25), dans lequel une pression est réglable dans un autre récipient (16) au moyen de l'autre dispositif de génération de pression (25), dans lequel le module d'impression (11) comprend au moins un dispositif d'entrée pour l'introduction de fluide d'impression supplémentaire (DF), dans lequel le dispositif d'entrée peut être relié à une entrée (20) du premier récipient (15).
  2. Module d'impression selon la revendication 1, caractérisé en ce que le module d'impression (11) présente en outre l'autre récipient (16), dans lequel la tête d'impression (10) est reliée à l'autre récipient (16) par le biais de l'entrée de tête d'impression (17).
  3. Module d'impression selon l'une quelconque des revendications 1 à 2, caractérisé en ce que le dispositif d'entrée peut être relié à une entrée (33) de l'autre récipient (16).
  4. Module d'impression selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le module d'impression (11) comprend au moins un capteur de pression (26, 27) pour la détection d'une pression de fluide dans un système de fluide.
  5. Module d'impression selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le module d'impression (11) présente une première section (13) et une autre section (14), dans lequel l'autre section (14) est agencée avec un angle prédéterminé en biais par rapport à la première section (13), dans lequel l'au moins une tête d'impression (10) est agencée dans ou au niveau de la première section (13) et au moins le premier récipient (15) est agencé dans l'autre section (14).
  6. Module d'impression selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le module d'impression (11) présente au moins un dispositif de réception pour au moins un élément d'appui et/ou présente au moins un élément d'appui, dans lequel l'au moins un élément d'appui peut être agencé au niveau du module d'impression (11) de sorte que le module d'impression (11) puisse être déposé sur une surface de dépôt (26).
  7. Module d'impression selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le module d'impression (11) présente au moins un élément de réception pour la réception du module d'impression (11) au niveau d'un dispositif support (2), dans lequel le module d'impression (11) peut être fixé et/ou orienté au niveau du dispositif support (2) au moyen de l'au moins un élément de réception dans une position prédéterminée et/ou avec une orientation prédéterminée.
  8. Procédé d'impression d'un corps de support (9), en particulier d'un corps de support (9) d'un document de valeur et/ou de sécurité, au moyen d'un module d'impression (11) selon l'une quelconque des revendications 1 à 7, dans lequel un fluide d'impression (DF) s'écoule à travers une entrée de tête d'impression (17) dans au moins une tête d'impression (10), dans lequel une partie du fluide d'impression (DF) est éjectée vers le corps de support (9) à travers au moins une buse (23) dans une direction de sortie de buse (z), dans lequel le fluide d'impression (DF) s'écoule à travers une sortie de tête d'impression (18) dans un premier récipient (15), dans lequel au moins une partie du premier récipient (15) est agencée dans la direction de sortie de buse (z) en amont de l'au moins une sortie de tête d'impression (18).
  9. Procédé selon la revendication 8, caractérisé en ce qu'une différence de pression prédéterminée entre une pression au niveau de l'entrée de tête d'impression (17) et une pression au niveau de la sortie de tête d'impression (18) est réglée.
  10. Procédé selon l'une quelconque des revendications 8 ou 9, caractérisé en ce qu'une pression est réglée au niveau de l'entrée de tête d'impression (17) en fonction d'une pression de ménisque souhaitée et/ou en fonction d'une distance (A) entre l'au moins une sortie de tête d'impression (18) et le premier récipient (15) dans la direction de sortie de buse (z) et/ou en fonction d'une différence de pression souhaitée entre la pression au niveau de l'entrée de tête d'impression (17) et la pression au niveau de la sortie de tête d'impression (18).
  11. Dispositif d'impression d'un corps de support (9), en particulier d'un corps de support (9) d'un document de valeur et/ou de sécurité, dans lequel le dispositif d'impression (1) comprend au moins un dispositif de support (2) et au moins un module d'impression (11) selon l'une quelconque des revendications 1 à 7, dans lequel l'au moins un module d'impression (11) est fixé au niveau du dispositif support (2) avec une position et/ou orientation prédéterminée.
EP15707950.0A 2014-03-07 2015-03-05 Module d'impression, procédé d'impression et dispositif d'impression Active EP3113955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014204190.2A DE102014204190A1 (de) 2014-03-07 2014-03-07 Druckmodul, Verfahren zum Bedrucken und Druckeinrichtung
PCT/EP2015/054569 WO2015132322A1 (fr) 2014-03-07 2015-03-05 Module d'impression, procédé d'impression et dispositif d'impression

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EP3113955A1 EP3113955A1 (fr) 2017-01-11
EP3113955B1 true EP3113955B1 (fr) 2019-05-22

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WO2015132322A1 (fr) 2015-09-11
EP3113955A1 (fr) 2017-01-11

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