EP4272967A1 - Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation - Google Patents

Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation Download PDF

Info

Publication number
EP4272967A1
EP4272967A1 EP22171800.0A EP22171800A EP4272967A1 EP 4272967 A1 EP4272967 A1 EP 4272967A1 EP 22171800 A EP22171800 A EP 22171800A EP 4272967 A1 EP4272967 A1 EP 4272967A1
Authority
EP
European Patent Office
Prior art keywords
ink
paint application
printing
application units
units
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.)
Pending
Application number
EP22171800.0A
Other languages
German (de)
English (en)
Inventor
Frank Oldorff
Falko Geitz
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.)
Swiss Krono Tec AG
Original Assignee
Swiss Krono Tec AG
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 Swiss Krono Tec AG filed Critical Swiss Krono Tec AG
Priority to EP22171800.0A priority Critical patent/EP4272967A1/fr
Priority to PCT/EP2023/061580 priority patent/WO2023213829A1/fr
Publication of EP4272967A1 publication Critical patent/EP4272967A1/fr
Pending legal-status Critical Current

Links

Images

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
    • B41J2/1714—Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal
    • 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
    • B41J2002/012—Ink jet with intermediate transfer member
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/12—Embodiments of or processes related to ink-jet heads with ink circulating through the whole print head

Definitions

  • the invention relates to a method for printing an object that is not paper by means of a digital printing system which has several ink applicators for applying printing ink of different colors to the paper, wherein in the method an ink carrier element is guided past the ink applicators in a feed direction.
  • the invention also relates to a digital printing system that is suitable and set up for printing on paper using such a method.
  • the ink carrier element to which the printing ink is applied is, for example, a printing cylinder, from which the printing ink, which is applied to the printing cylinder via the ink application units, is applied to an applicator roller that prints on the object that is actually to be printed.
  • a printing tape can also be used.
  • This printing belt is tensioned and set in motion over at least two rollers, for example a printing roller, which can also be called a printing cylinder, and a conveyor roller, which can also be called an applicator roller.
  • the inking units print the printing ink onto the printing ribbon, which in this case forms the ink carrier element. From there it is transferred to the actual object to be printed.
  • the invention is therefore based on the object of proposing a method with which safe and continuous production is better enabled.
  • the invention solves the problem set by a method for printing an object that is not paper, using a digital printing system which has several ink applicators for applying printing ink of different colors to the paper, with an ink carrier element being guided past the ink applicators in a feed direction is, wherein the method is characterized in that the digital printing system has a device which is set up and suitable to prevent or reduce condensation formation on the ink application units, and with this device the condensation formation on the ink application units is prevented or reduced.
  • the ink carrier element to be printed is therefore guided past the various ink application units within the digital printing system.
  • the printing ink to be applied by the respective ink application unit is applied to the ink carrier element.
  • the ink carrier element is consequently printed with the desired decor.
  • this decor is then transferred to the object to be printed by rolling the ink carrier element onto this object.
  • the ink carrier element is the object.
  • the invention makes it possible to reduce the formation of condensate or to prevent it completely and thus solve the problem.
  • a device is present for this purpose, which is preferably part of the digital printing system and is set up and suitable to prevent or reduce the formation of condensation.
  • the method according to the invention it also takes on this task. This means in particular that less condensate is created in a digital printing system with this device than in a digital printing system that does not have this device. This is particularly true when otherwise identical parameters are used.
  • the device preferably has a temperature control device and an electrical control.
  • the temperature control device is set up to influence a temperature of the paint application units. This can happen in different directions.
  • the temperature control device preferably comprises a heater which is set up to increase the temperature of the paint application units.
  • the heater is particularly preferably set up to increase the temperature of the paint application units independently of one another.
  • the temperature control device preferably has a cooling system which is set up to reduce the temperature of the paint application units.
  • the cooling is particularly preferably set up to reduce the temperature of the paint application units independently of one another.
  • the electrical control is set up to control the temperature control device.
  • the digital printing system has at least one temperature sensor.
  • the digital printing system particularly preferably has at least one temperature sensor per ink application unit.
  • the temperature sensor is set up to transmit measurement data to the electrical control, which contains information about the temperature of the respective paint application unit. It is therefore possible to measure the temperature.
  • the electrical control is preferably set up to access an electronic data memory in which a target temperature value for the respective paint application unit is stored.
  • the electrical control is or preferably contains an electronic data processing device. The electrical control compares the temperature of a paint application unit measured by the sensor with the target temperature stored in the electronic data memory and is set up to control the temperature control device based on the result of this comparison.
  • the electrical control sends control signals to the temperature control device, which then changes the temperature of the paint application unit. If the measured temperature is greater than the stored target temperature, the cooling of the temperature control device is controlled by the control signals and reduces the temperature. If the measured temperature is lower than the stored target temperature, the heating of the temperature control device is controlled by the control signals.
  • the electrical control is set up to control the temperature control device in such a way that the paint application units have different temperatures.
  • the temperatures of the paint application units particularly preferably increase in the feed direction.
  • This embodiment is based on the knowledge that the amount of liquid printing ink applied to the ink carrier element increases in the feed direction. This also increases the risk of condensation forming from the amount of liquid applied. The higher the temperature of the paint applicator, the lower the probability that liquid in the area surrounding the paint applicator will get on the paint applicator condensed. It is therefore generally advantageous if the temperatures of the paint application units increase in the feed direction.
  • the temperatures of two adjacent paint application units differ by at least 0.5 ° C, preferably by at least 0.7 ° C, particularly preferably by at least 1.0 ° C.
  • the temperatures of two adjacent paint application units differ by a maximum of 1.5 °C, preferably by a maximum of 1.3 °C, particularly preferably by a maximum of 1.0 °C.
  • the digital printing system has, for example, four ink application units whose temperatures increase in the feed direction.
  • the temperature of the first inking unit is 29 °C
  • that of the second inking unit is 30 °C
  • that of the third printing unit is 31 °C
  • that of the fourth printing unit is 32 °C.
  • the temperature between the ink carrier element to be printed and the print head is as low as possible in order to reduce the risk of condensation forming. Since the ink carrier element is also heated as it passes through the digital printing system, it is advantageous if the temperature of the ink applicator also increases in the feed direction. On the other hand, the amount of printing ink that is applied by the respective ink applicator increases with the temperature of the ink applicator. It is therefore advantageous to limit the overall difference in temperature between the first and the last paint applicator.
  • the temperatures of the first paint application unit in the feed direction and the last paint application unit in the feed direction differ by a maximum of 10 ° C, preferably by a maximum of 7 ° C, particularly preferably by a maximum of 5 ° C.
  • the digital printing system preferably has a cooling device which is set up to cool the ink carrier element.
  • a cooling device which is set up to cool the ink carrier element. This is particularly advantageous when an indirect printing process is used.
  • the printing ink is transferred from the ink applicator to the Color carrier element and transferred from this directly or indirectly to the object.
  • the ink carrier element therefore rotates within the digital printing system and is guided past the ink application units several times.
  • it is a single-pass system, as all the colors used for printing are applied to the ink carrier element in a single pass.
  • the ink carrier element heats up a little with each cycle, so that the temperature of the ink carrier element can rise during ongoing operation of the digital printing system.
  • the cooling device is present to reduce the associated increased risk of condensation formation.
  • the device preferably has an additional temperature sensor which is set up to determine the temperature of the ink carrier element.
  • the measured values determined by these additional sensors are transmitted to the electrical control, preferably the electronic data processing device, in which they are preferably compared with stored target values. Depending on the result of this comparison, the electrical control controls the cooling device.
  • the device has at least one air flow deflector which is arranged between two paint application units and is set up and suitable for deflecting an air flow from one paint application unit to an adjacent paint application unit.
  • An air flow that would flow from one paint applicator to the adjacent paint applicator without the air flow deflector is consequently deflected by the air flow deflector.
  • An air flow deflector can, for example, be designed in the form of a wall or plate that is placed or positioned in the path of the actual air flow.
  • the device particularly preferably has at least one air flow deflector between two adjacent paint application units. This means that whenever two paint application units are arranged adjacent to one another, there is at least one air flow deflector between these two paint application units.
  • the device preferably has at least one air extraction device which is arranged between two adjacent paint application units and is suitable and set up to extract air between the two paint application units.
  • the device particularly preferably has at least one air suction device between two adjacent paint application units. This means that whenever two paint application units are arranged adjacent to one another, there is at least one air suction device between these two paint application units.
  • the air suction device sucks away a spray mist of ink that is created when the printing ink emerges from the ink application unit.
  • the air suction device is preferably part of a cooling system for the temperature control device.
  • the device advantageously has a housing that surrounds the paint application units. In this way, moisture, spray mist and other factors that accelerate or support the formation of condensation can be kept away from the print heads of the ink application units.
  • the digital printing system has a monitoring unit which is set up to detect the formation of condensation on at least one ink application unit.
  • the invention also solves the problem set by a digital printing system of the type described here, which is set up and suitable for printing the object that is not paper in a method described here.
  • a digital printing system comprises at least one four-color set, preferably a five-color set, for printing.
  • the ink sequence is optimized for decorative printing (for example, for a color set containing five colors: blue - reddish yellow - red - greenish yellow - black).
  • the waveform created, i.e. the drop shape generated on the ink applicator, allows an adjustable temperature tolerance of the print heads of at least 3 ° C, preferably 6 ° C, particularly preferably 10 ° C, without any obvious color deviation being visible in the decor.
  • the digital printing system is calibrated and profiled according to its chemical-physical properties and the object to be printed. It is necessary to determine the maximum amount of ink applied and to limit ink consumption to the required level.
  • the print data is created using the print profile determined and the resulting version X is ripped in the printing press.
  • the amount of ink applied is determined from the ripped data using printing software.
  • a board to be printed for example a ROH HDF board, 2070 x 2800mm
  • a melamine resin-based primer is applied and dried at 210°C, preferably at 200°C.
  • several layers of white for example a solution of water and titanium dioxide
  • Drying takes place online after each paint application, the dryer temperature is gradually lowered to 190°C after the first application until the last paint application.
  • a primer for example a reactive primer
  • the plate, coated ready for printing is cooled in a cooling paternoster from 57°C to 38°C, preferably 36°C, before digital plate printing.
  • the plate optimized in this way is printed online at a system speed of 80 m/min, preferably 85 m/min.
  • a water-based ink system is used here. From a structural point of view, it is possible to decouple the printing unit from the printing material, i.e. the plate to be printed, using an applicator roller or transfer conveyor belt.
  • the indirect order represents a temperature buffer that is adapted to the production requirements with cooling and heating through air conditioning.
  • An enclosure is installed near the paint application units to limit environmental influences.
  • the theoretical amount of ink applied to the decoration on the digital plate printer is used to control the temperature gradation of the individual printing units.
  • the inking units are increased by 1°C from plant 1 to plant 4 or plant 5. Particularly preferred: 1. Printing unit 29°C; 2. Printing unit 30°C; 3. Printing unit 31°C; 4th pressure 32°C or 5th pressure 33°C.
  • Automatic condensate monitoring is achieved using laser inspection. If a laser detects condensate early, the insertion is automatically stopped. A corresponding time gap was inserted into ongoing production to clean the heads.
  • the plate buffer is preferably filled in the cooling paternoster in front of it. After cleaning, the plates are fed back into the printing process. As a result, an interval can be determined for each decor from the recorded data in relation to the production quantity. Cleaning is particularly preferably carried out at the best possible time, for example when changing the decor or another necessary production interruption (for example a sanding belt change).
  • the air flow deflectors with suction remove the moisture-saturated air from the print head area of the machine during ongoing production without affecting the ink flow.
  • the printed panels are coated with melamine resin and dried again and cooled to 30°C in the cooling tower. Then taken to a crane warehouse to ripen.
  • Figure 1 shows a digital printing system with a printing unit 2, which is surrounded by a housing 4. It has four color application units 6, each of which can be used to apply printing ink of one color. A fifth paint application unit 6 is shown with dashed lines. This illustrates that additional paint application units 6 are optionally possible.
  • the ink application units 6 apply the printing ink to a printing cylinder 8, which forms the ink carrier element in this embodiment. It is rotated along the direction of arrow 10 so that the printing cylinder 8 is guided past the inking units 6. The direction of movement, which is represented by the arrow 10, therefore forms the feed direction of the ink carrier element in the exemplary embodiment shown.
  • the printing cylinder 8 is in contact with an applicator roller 12 which is rotated along the direction of arrow 14. Due to the contact of the application width 12 with the printing cylinder 8, the printing ink applied by the inking units 6 is transferred from the printing cylinder 8 to the applicator roller 12.
  • the applicator roller 12 is rolled onto an object 16 to be printed. This is moved in the transport direction 18.
  • a conveyor unit 20 is available for this purpose.
  • the washing unit 22 has a dryer unit 24 which dries the roller of the washing unit 22 and thus prepares it for the further absorption of printing ink remaining on the applicator roller 12.
  • a device 26 is arranged between two adjacent inking units, which is designed to reduce or completely prevent the formation of condensation on the inking units 6.
  • the device 26 is an air extraction system, shown only schematically, and an air flow deflector.
  • the housing 4 also ensures less condensation formation on the paint application units 6 and is therefore also part of the device 26.
  • Figure 2 shows another embodiment of a digital printing device. It also has paint application units 6, with a fifth paint application unit being shown in dashed lines and thus marked as optional. Between two adjacent paint application units 6 there is again a device 26 to reduce the formation of condensation.
  • the ink carrier element is not a printing cylinder 8, but a printing belt 28 which rotates in the direction of arrows 30. In the exemplary embodiment shown, the direction of the arrows 30 therefore forms the feed direction of the ink carrier element.
  • the printing belt 28 runs around the printing cylinder 8 and a conveyor roller 32, through which the printing belt 28 is also moved in the exemplary embodiment shown. The remaining designs and details correspond to those of the design Figure 1 .
  • Figure 3 shows a further embodiment of a digital printing device according to an embodiment of the present invention.
  • the printing belt 28 not only around the printing cylinder 8 and the conveyor roller 32, but also around a cleaning aid 34 at the top.
  • This is part of the washing unit 22, which has two cleaning squeegees 36 in the exemplary embodiment shown.
  • This embodiment also has the facilities 26 like the embodiments of Figures 1 and 2 .

Landscapes

  • Coating Apparatus (AREA)
EP22171800.0A 2022-05-05 2022-05-05 Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation Pending EP4272967A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22171800.0A EP4272967A1 (fr) 2022-05-05 2022-05-05 Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation
PCT/EP2023/061580 WO2023213829A1 (fr) 2022-05-05 2023-05-02 Procédé d'impression d'un papier, et dispositif d'impression numérique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22171800.0A EP4272967A1 (fr) 2022-05-05 2022-05-05 Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation

Publications (1)

Publication Number Publication Date
EP4272967A1 true EP4272967A1 (fr) 2023-11-08

Family

ID=81580873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22171800.0A Pending EP4272967A1 (fr) 2022-05-05 2022-05-05 Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation

Country Status (2)

Country Link
EP (1) EP4272967A1 (fr)
WO (1) WO2023213829A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130293618A1 (en) * 2012-05-02 2013-11-07 David F. Tunmore Inkjet printer with in-flight droplet drying system
US20170341399A1 (en) * 2016-05-30 2017-11-30 Canon Kabushiki Kaisha Printing apparatus
US10479124B2 (en) * 2017-07-06 2019-11-19 Canon Kabushiki Kaisha Inkjet printing apparatus and temperature control method thereof
EP3763533A1 (fr) * 2019-07-10 2021-01-13 Fritz Egger GmbH & Co. OG Dispositif et procédé d'impression de corps profilés, en particulier de bandes de bord
WO2021008817A1 (fr) * 2019-07-17 2021-01-21 Scrona Ag Tête d'impression ventilée
US20210031508A1 (en) * 2019-07-31 2021-02-04 Ricoh Company, Ltd. Liquid discharge apparatus
US20220111633A1 (en) * 2015-04-14 2022-04-14 Landa Corporation Ltd. Indirect printing system and related apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130293618A1 (en) * 2012-05-02 2013-11-07 David F. Tunmore Inkjet printer with in-flight droplet drying system
US20220111633A1 (en) * 2015-04-14 2022-04-14 Landa Corporation Ltd. Indirect printing system and related apparatus
US20170341399A1 (en) * 2016-05-30 2017-11-30 Canon Kabushiki Kaisha Printing apparatus
US10479124B2 (en) * 2017-07-06 2019-11-19 Canon Kabushiki Kaisha Inkjet printing apparatus and temperature control method thereof
EP3763533A1 (fr) * 2019-07-10 2021-01-13 Fritz Egger GmbH & Co. OG Dispositif et procédé d'impression de corps profilés, en particulier de bandes de bord
WO2021008817A1 (fr) * 2019-07-17 2021-01-21 Scrona Ag Tête d'impression ventilée
US20210031508A1 (en) * 2019-07-31 2021-02-04 Ricoh Company, Ltd. Liquid discharge apparatus

Also Published As

Publication number Publication date
WO2023213829A1 (fr) 2023-11-09

Similar Documents

Publication Publication Date Title
WO2007059805A1 (fr) Dispositif de revetement comprenant une substance de revetement fluide destinee a des surfaces lisses ou structurees
EP0081830B1 (fr) Méthode et dispositif pour étendre une couche sur des plaques rigides minces
EP3072700A1 (fr) Procede destine a regler et a commander la re-humidification et le sechage de bandes de papier
EP4200584A1 (fr) Procédé pour l'impression d'une décoration, et appareil pour celui-ci
EP2942207B1 (fr) Procédé de fabrication de plaques en bois décorées et panneau de sol fabriqué à partir de celles-ci
EP3013589B1 (fr) Installation de fabrication de plaques en matériau dérivé du bois et procédé de fabrication d'une plaque en matériau dérivé du bois
DE3207463C2 (de) Verfahren und Vorrichtung zum Trocknen und anschließendem Kühlen von insbesondere nach dem Offsetdruckverfahren bedruckten Warenbahnen
DE3211157A1 (de) Verfahren und vorrichtung zum befeuchten von druckplatten
DE4424528A1 (de) Verfahren zum Bedrucken von Rotationskörpern und Anlage zum Durchführen des Verfahrens
EP4272967A1 (fr) Procédé d'impression sur un substrat et imprimante numérique comprenant des moyens pour réduire la formation de condensation
EP2838671A1 (fr) Procédé et dispositif destinés à produire une surface peinte structurée
EP0821101A2 (fr) Dispositif d'humidification
WO2023213828A1 (fr) Procédé d'impression d'un papier, et dispositif d'impression numérique
EP3960479B1 (fr) Procédé d'impression de la surface d'une pièce dotée d'un décor et dispositif correspondant
DE102018216927B4 (de) Verfahren zum Herstellen eines Druckprodukts
EP0440576B1 (fr) Dispositif à invalider de documents de valeur
EP4255736A1 (fr) Procédé et appareil d'impression d'une surface d'un papier
EP4279284A1 (fr) Procédé et dispositif d'impression d'un papier
DE102006011761A1 (de) Vorrichtung zum Auftragen einer flüssigen Beschichtung
DE19644551A1 (de) Mehrfarben-Druckmaschine
AT406491B (de) Markiervorrichtung
WO2021037612A1 (fr) Procédé pour réaliser une optique profilée sur la surface de papier et machine de couchage destinée au couchage de surfaces de papier
EP3026391A1 (fr) Procédé de détermination de la quantité d'une couche appliquée sur une plaque de support, en particulier d'une couche de fond
EP4385746A1 (fr) Piège à lumière pour rayonnement uv lors du durcissement d'encre sur un matériau d'impression et machine d'impression dotée d'un piège à lumière
DE102022213491A1 (de) Druckbildkorrektur

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240426

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED