EP2755827B1 - Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor - Google Patents

Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor Download PDF

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Publication number
EP2755827B1
EP2755827B1 EP13771162.8A EP13771162A EP2755827B1 EP 2755827 B1 EP2755827 B1 EP 2755827B1 EP 13771162 A EP13771162 A EP 13771162A EP 2755827 B1 EP2755827 B1 EP 2755827B1
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EP
European Patent Office
Prior art keywords
carrier
printing unit
printing
electrostatic charges
electrostatic
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
EP13771162.8A
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German (de)
English (en)
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EP2755827A1 (fr
Inventor
Hans-Jürgen HANNIG
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.)
Akzenta Paneele and Profile GmbH
Original Assignee
Akzenta Paneele and Profile 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 Akzenta Paneele and Profile GmbH filed Critical Akzenta Paneele and Profile GmbH
Priority to PL13771162T priority Critical patent/PL2755827T3/pl
Priority to EP13771162.8A priority patent/EP2755827B1/fr
Publication of EP2755827A1 publication Critical patent/EP2755827A1/fr
Application granted granted Critical
Publication of EP2755827B1 publication Critical patent/EP2755827B1/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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing

Definitions

  • the present invention relates to a device for improved direct printing of decorative panels, as well as a method for improved direct printing of decorative panels.
  • a panel printing apparatus according to the preamble of claim 1 is known from the document US 6 634 729 B1 known.
  • the term decorative panel is understood to mean wall, ceiling or floor panels which have a decor applied to a carrier plate.
  • Decorative panels are used in a variety of ways, both in the field of interior design of rooms, as well as the decorative cladding of buildings, for example in exhibition construction.
  • One of the most common uses of decorative panels is their use as floor coverings.
  • the decorative panels often have a decor that is intended to recreate a natural material.
  • simulated natural materials are wood species such as e.g. Maple, oak, birch, cherry, ash, walnut, chestnut, wenge or even exotic woods such as panga panga, mahogany, bamboo and bubinga.
  • wood species such as e.g. Maple, oak, birch, cherry, ash, walnut, chestnut, wenge or even exotic woods such as panga panga, mahogany, bamboo and bubinga.
  • many natural materials such as Steinobei vom or ceramic surfaces are modeled.
  • such decorative panels are often produced as laminates, in which on a carrier plate with a desired decor pre-printed decorative paper is applied, which in turn is then applied a so-called overlay. After optionally a Gegenzugpapier was still applied to the decorative paper opposite side of the support plate, the layer structure obtained is firmly bonded together using suitable pressure and / or heat-activated adhesive.
  • the material of the carrier can be selected depending on the field of application.
  • the support may be made of wood-based material unless the decorative panel is exposed to excessive moisture or weather conditions.
  • the carrier may for example consist of a plastic.
  • wood-based materials in addition to solid wood materials are also materials such as e.g. Cross laminated timber, glued laminated timber, composite plywood, laminated plywood, veneer plywood, veneer plywood and bent plywood.
  • wood-base materials within the meaning of the invention also include wood-chip materials, such as wood-based materials. Chipboard, extruded sheet, Oriented Structural Board (OSB) and chipboard wood, as well as wood fiber materials such as Wood fiber insulation boards (HFD), medium-hard and hard fiberboard (MB, HFH), and in particular medium-density fiberboard (MDF) and high-density fibreboard (HDF) to understand.
  • wood fiber insulation boards HFD
  • MB medium-hard and hard fiberboard
  • MDF medium-density fiberboard
  • HDF high-density fibreboard
  • WPC wood-plastic composites
  • sandwich panels of a lightweight core material such as foam, rigid foam or paper honeycomb and a wooden layer applied thereto, and mineral, e.g. with cement, bonded chipboards form wood materials in the context of the invention.
  • Cork also represents a wood material in the context of the invention.
  • Plastics which can be used in the production of corresponding panels are, for example, thermoplastics, such as polyvinyl chloride, polyolefins (for example polyethylene (PE), polypropylene (PP), polyamides (PA), polyurethanes (PU), polystyrene (PS), acrylonitrile). Butadiene-styrene (ABS), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyetheretherketone (PEEK) or Mixtures or copolymers of these.
  • the plastics may contain conventional fillers, for example calcium carbonate (chalk), alumina, silica gel, quartz flour, wood flour, gypsum. Also, they can be colored in a known manner.
  • direct printing refers to the application of a decoration directly to the support of a panel or to a non-printed fiber material layer applied to the support. Contrary to the conventional method, in which a previously printed with a desired decor decorative layer is applied to a carrier, the printing of the decoration takes place during direct printing directly in the course of panel production.
  • the inkjet process inkjet printing process is used.
  • fiber materials materials such as e.g. Paper and nonwovens based on vegetable, animal, mineral or even artificial fibers to understand, as well as cardboard.
  • fibrous materials made of vegetable fibers, in addition to papers and webs of cellulose fibers, plates of biomass such as straw, maize straw, bamboo, leaves, algae extracts, hemp, cotton or oil palm fibers.
  • animal fiber materials are keratin-based materials such as e.g. Wool or horsehair.
  • mineral fiber materials are mineral wool or glass wool.
  • a wearing and / or covering layer in the sense of the invention is a layer applied as an outer finish, which in particular protects the decorative layer from abrasion or damage by dirt, moisture or mechanical effects such as abrasion.
  • the wear layer hard materials such as Titanium nitride, titanium carbide, silicon nitride, silicon carbide, boron carbide, tungsten carbide, tantalum carbide, alumina (corundum), zirconium oxide or mixtures thereof to increase the wear resistance of the layer.
  • the hard material in an amount between 5 wt .-% and 40 wt .-%, preferably between 15 wt .-% and 25 wt .-% in the wear layer composition is included.
  • the hard material preferably has an average particle diameter between 10 ⁇ m and 250 ⁇ m, more preferably between 10 ⁇ m and 100 ⁇ m. In this way, it is advantageously achieved that the wear layer composition forms a stable dispersion and segregation or settling of the hard material in the wear layer composition can be avoided.
  • the hard material-containing and radiation-curable composition in a concentration between 10 g / m 2 and 250 g / m 2 , preferably between 25 g / m 2 and 100g / m 2 applied becomes.
  • the application can be applied for example by means of rollers, such as rubber rollers or by means of pouring devices.
  • the hard material is not present in the composition at the time of application of the wear layer composition, but is scattered as particles onto the applied wear layer composition and this is subsequently cured.
  • a matching with the decor surface structuring is introduced.
  • the surface of the decorative panel has a haptic perceptible structure which corresponds to the shape and pattern of the applied decor, so as to obtain a true to the original reproduction of a natural material also in terms of haptics.
  • the carrier plate already has a structuring and alignment of a printing tool for applying the decoration and the support plate to each other in dependence on the detected by means of optical methods structuring of the carrier plate.
  • a structuring of the decorative panels after the application of the cover and / or wear layer takes place.
  • a curable composition is applied as cover and / or wear layer and a curing process takes place only to the extent that only partial hardening of the cover and / or wear layer takes place.
  • a desired surface structure is impressed by means of suitable tools, such as a hard metal structural roll or a stamp.
  • the embossing is done in accordance with the applied decor.
  • a further hardening of the now structured covering and / or wear layer takes place.
  • the invention thus proposes a panel printing machine comprising a supply means for a support to be printed and a printing unit, characterized in that the panel printing unit comprises at least one means for discharging electrostatic charges from the support and at least one behind the means for discharging electrostatic charges Having arranged from the carrier means for supplying electrostatic charges to the carrier.
  • a device for dissipating electrostatic charges from the substrates to be printed in combination with at least one arranged behind the means for discharging electrostatic charges from the carrier device for supplying electrostatic charges to the carrier is suitable, the occurrence of Blurs in the course of the production process to avoid.
  • the undefined electrostatic charge in the substrates to be printed during the production process leads to an undefined deflection of the ink or ink drops on their way from the print head to the surface to be printed. It is assumed that the build-up electrostatic field on the carriers not predictably distracts the generally positively charged color particles, so that they do not impinge on the intended point of the surface to be printed.
  • the undefined deflection of ink drops can be prevented by an unpredictable electrostatic charge. It has surprisingly been found that the printed image compared to a mere discharge of electrostatic charges can be further improved.
  • the device for supplying electrostatic charges to the carrier behind, ie in the direction of movement of the carrier a means for dissipating electrostatic charges from the carrier and in particular spaced therefrom, can thereby a particularly accurate electrostatic charge in or on the carrier be applied.
  • the carrier may have a particularly uniform and defined electrostatic charge or charge during printing, since local charge peaks can be prevented.
  • the type, ie positive or negative polarity, and size of the charge introduced or applied can be selected depending on the material of the carrier and / or the printing process and / or other factors.
  • the device for supplying electrostatic charges to the carrier may have a charge generator for positive (+) or negative (-) polarity and in this case to a power supply or to a power supply be connected to apply a defined charge on the carrier or the carrier surface.
  • the printed image at a direct pressure on a carrier be significantly improved.
  • the device for discharging electrostatic charges from the carrier and / or the device for supplying electrostatic charges to the carrier is configured as a bar, which has a substantially parallel to a surface of the carrier and in Direction of the carrier arranged surface.
  • this surface of the strip serving as an active loading or unloading surface can extend over the entire width of the carrier, ie substantially in a direction at right angles to the direction of movement of the carrier over the entire extent of the carrier.
  • a surface of the strip running essentially parallel to a surface of the carrier may in particular mean that the strip is essentially at least in the electrostatically discharging or loading region, ie for example with a deviation of ⁇ 20%, in particular ⁇ 10%, for example ⁇ 1 %, has a uniform distance to the carrier.
  • Such a strip may in particular be such a component which is approximately rectangular in shape and has, for example, two plane-aligned surfaces, which surfaces are arranged in the direction of the carrier and in the opposite direction.
  • the device for discharging electrostatic charges from the carrier and / or the device for supplying electrostatic charges to the carrier can be designed as a ground bar.
  • corona discharges can be avoided and local charge peaks or charge changes can be effectively prevented, so that a discharge and in particular an electrostatic charge to produce a highly uniform charge distribution can be particularly uniform and defined realizable, so that the printed image can be particularly defined and high quality.
  • An electrostatic charge can be realized, for example, by applying a defined voltage to the strip, wherein the nature and amount of the voltage can influence or set the type and amount of the electrostatic charge.
  • an electrostatic charging can be improved by an electrically conductive contacting of the moving support through the bar.
  • an electrostatic discharge wherein in this case, a discharge by applying a voltage or by connecting to an electrical ground potential may be possible.
  • the means for discharging electrostatic charges comprises at least one roller, brush or lip made of a conductive material, which electrically contacts the carrier at least in the region of the printing unit and which is connected to an electrical ground potential.
  • the electrical ground potential can be provided for example by a ground.
  • the discharge of the electrostatic charge takes place via a roller, which is part of the feed device to the printing unit. This allows a compact design of the device can be achieved. According to a particularly preferred embodiment of the invention, it may be provided that a plurality of the transport of the carrier within a manufacturing line for the production of decorative panels are designed such that it can be discharged via this any occurring electrostatic charges.
  • the strip, roller, brush or lip is preferably formed at least in the contact region with the carrier of a material having a conductivity ⁇ 1 * 10 3 Sm -1 .
  • the electrical resistance between the carrier and the mass potential is ⁇ 0.5 S2, preferably ⁇ 0.05 ⁇ .
  • the strip, roller, brush or lip, by means of which the carrier is contacted may for example be formed in the contact region with the carrier of an electrically conductive metal such as steel, chromium, copper, aluminum, silver or a conductive alloy such as brass or bronze.
  • the roller, brush or lip at least partially made of an electrically conductive plastic.
  • suitable electrically conductive plastics are poly-3,4-ethylenedioxythiophene, doped polythiophene, doped polyethyne, polyaniline and polypyrrole.
  • An advantage of such conductive plastics over metals is that the plastics are softer than the metals, thereby avoiding any damage to the backing by scratching.
  • the roller, brush or lip consists of a conductive fabric at least at the contact points with the carrier. This can be for example a plastic fabric, in which metal threads are woven.
  • this has a printing unit upstream Ionticianseimichtung by means of which an ionized air jet is passed over the carrier to be printed. It has been found that the exposure to ionized air is suitable for further reducing or increasing the occurrence of electrostatic charging of the carriers.
  • the printing unit to an inkjet print head.
  • a discharge is carried out in a range of greater than or equal to 7 kV, in particular greater than or equal to 10 kV, for example in a range of greater than or equal to 7 kV to less than or equal to 15 kV.
  • an electrostatic charge in a range of greater than 0 kV to less than or equal to 15 kV, for example, to less than or equal to 10 kV, regardless of the type of charge, are performed. It has surprisingly been found that in particular a discharge by a prescribed amount of charge and / or a loading by a prescribed amount of charge can lead to a particularly good print image.
  • the means for reducing the electrostatic charge comprise the electrically conductive contacting of the carrier with a ground potential.
  • the contacting of the carrier by means of a bar, roller, brush or lip made of a material having an electrical conductivity ⁇ 1 * 10 3 Sm -1 .
  • the carrier is subjected to an ionized air flow before and / or during the feed to the printing unit. It has been shown that the admission with an ionized air stream is capable of significantly reducing or increasing an electrostatic charge in the carriers.
  • Fig. 1 1 shows a panel printing device 100.
  • the device 100 has a feed device 110 for a carrier 600 to be printed, by means of which the carrier 600 is fed to a printing unit 120.
  • the printing unit 120 comprises an inkjet printhead which, under the control of a computer system, applies a decorative image to the carrier 600.
  • the device 100 has a device 130 for discharging electrostatic charges from the carrier 600, which may touch the carrier 600 approximately, and further comprises a means disposed behind the device 130 for discharging electrostatic charges from the carrier 600 means 170 for supplying electrostatic charges on the Carrier 600, which can also touch the carrier 600.
  • the device 130 and the device 170 are arranged in the region of the feed device 110 and formed from a rectangular strip of a conductive material, wherein the discharge device 130 is connected by a ground 150 to a ground potential and the lead-in 170 with a power supply 180 or with a Voltage source is connected.

Claims (13)

  1. Dispositif d'impression de panneaux (100), présentant un dispositif d'alimentation (110) pour un support (600) à imprimer et un système d'impression (120) pour un procédé d'impression par jet d'encre, où le dispositif d'impression de panneaux (100) présente au moins un dispositif (130) destiné à évacuer des charges électrostatiques à partir du support (600), caractérisé en ce que le dispositif d'impression de panneaux (100) présente de manière complémentaire au moins un dispositif (170) pour l'alimentation en charges électrostatiques sur le support (600) disposé derrière le dispositif (130) destiné à évacuer des charges électrostatiques à partir du support (600).
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif (130) est conçu sous la forme d'une baguette destinée à l'évacuation de charges électrostatiques à partir du support (600) et/ou le dispositif (170) pour l'approvisionnement en charges électrostatiques sur le support (600), laquelle baguette présente une surface s'étendant essentiellement de manière parallèle par rapport à une surface du support (600) et disposée en direction du support (600).
  3. Dispositif selon la revendication 1, où le dispositif (130) destiné à l'évacuation de charges électrostatiques présente au moins un rouleau, une brosse ou une lèvre constitué(e) d'un matériau conducteur, lequel (laquelle) se met en contact conducteur électriquement avec le support (600) au moins dans la zone du système d'impression (120) et lequel (laquelle) est relié(e) avec un potentiel de masse électrique.
  4. Dispositif selon la revendication 2 ou 3, où la baguette, le rouleau, la brosse ou la lèvre est formé(e) à partir d'un matériau avec une conductivité ≥ 1*103 Sm-1 au moins dans la zone de contact avec le support.
  5. Dispositif selon l'une des revendications 2 à 4, où la baguette, le rouleau, la brosse ou la lèvre sont constitué(e)s au moins partiellement d'une matière synthétique électriquement conductrice.
  6. Dispositif selon l'une des revendications précédentes, où celui-ci présente un dispositif d'ionisation (140) disposé préalablement au système d'impression (120) au moyen duquel un courant d'air ionisé est balayé sur le support (600) à imprimer.
  7. Dispositif selon l'une des revendications précédentes, où le système d'impression (120) comprend une tête d'impression à jet d'encre.
  8. Procédé pour l'impression directe de panneaux décoratifs avec un procédé d'impression à jet d'encre, présentant les étapes de procédé:
    - mise à disposition d'un support (600) à imprimer ;
    - transfert du support (600) vers un système d'impression (120);
    - impression d'un décor sur le support (600) au moyen du système d'impression (120), où le support (600) est traité avec des moyens destinés à la modification de la charge électrostatique du support (600) avant le transfert vers le système d'impression (120), en ce que le support (600) est d'abord déchargé électrostatiquement et ensuite un taux de charges défini est apporté au support (600).
  9. Procédé selon la revendication 8, caractérisé en ce que la décharge est effectuée dans un domaine supérieur ou égal à 7 kV.
  10. Procédé selon l'une des revendications 8 ou 9, caractérisé en ce que la charge électrostatique est effectuée dans un domaine entre une valeur supérieure à 0 kV et une valeur inférieure ou égale à 15 kV.
  11. Procédé selon l'une des revendications 8 à 10, où les moyens pour la diminution de la charge électrostatique comprennent la mise en contact électriquement conducteur du support (100) avec un potentiel de masse.
  12. Procédé selon l'une des revendications 8 à 11, où la mise en contact du support est effectuée au moyen d'une baguette rectangulaire, d'un rouleau, d'une brosse ou d'une lèvre constitué(e) d'un matériau avec une conductivité «électrique ≥ 1*103 Sm-1.
  13. Procédé selon l'une des revendications 8 à 12, où le support (600) est soumis à un courant d'air ionisé avant et/ou pendant le transfert vers le système d'impression (120).
EP13771162.8A 2012-10-04 2013-10-02 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor Active EP2755827B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL13771162T PL2755827T3 (pl) 2012-10-04 2013-10-02 Urządzenie i sposób do polepszonego bezpośredniego druku na panelach dekoracyjnych
EP13771162.8A EP2755827B1 (fr) 2012-10-04 2013-10-02 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12187205.5A EP2716462B1 (fr) 2012-10-04 2012-10-04 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor
PCT/EP2013/070586 WO2014053569A1 (fr) 2012-10-04 2013-10-02 Dispositif et procédé d'impression directe améliorée de lambris décoratifs
EP13771162.8A EP2755827B1 (fr) 2012-10-04 2013-10-02 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor

Publications (2)

Publication Number Publication Date
EP2755827A1 EP2755827A1 (fr) 2014-07-23
EP2755827B1 true EP2755827B1 (fr) 2016-12-07

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EP12187205.5A Active EP2716462B1 (fr) 2012-10-04 2012-10-04 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor
EP13771162.8A Active EP2755827B1 (fr) 2012-10-04 2013-10-02 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor

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EP12187205.5A Active EP2716462B1 (fr) 2012-10-04 2012-10-04 Dispositif et procédé destinés à améliorer l'impression directe de panneaux de décor

Country Status (16)

Country Link
US (1) US9132671B2 (fr)
EP (2) EP2716462B1 (fr)
JP (1) JP2015508337A (fr)
KR (1) KR20140090146A (fr)
AU (1) AU2013311107B2 (fr)
BR (1) BR112014008110B1 (fr)
CA (1) CA2850605C (fr)
CL (1) CL2014000598A1 (fr)
ES (2) ES2630017T3 (fr)
MX (1) MX2014004919A (fr)
MY (1) MY170987A (fr)
PL (2) PL2716462T3 (fr)
PT (2) PT2716462T (fr)
RU (1) RU2563215C1 (fr)
UA (1) UA110285C2 (fr)
WO (1) WO2014053569A1 (fr)

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PT2755827T (pt) 2017-02-14
MY170987A (en) 2019-09-23
BR112014008110B1 (pt) 2021-10-13
US9132671B2 (en) 2015-09-15
ES2630017T3 (es) 2017-08-17
BR112014008110A2 (pt) 2017-04-11
EP2755827A1 (fr) 2014-07-23
AU2013311107B2 (en) 2015-07-23
RU2563215C1 (ru) 2015-09-20
PL2716462T3 (pl) 2017-09-29
ES2615079T3 (es) 2017-06-05
CN103842180A (zh) 2014-06-04
EP2716462A1 (fr) 2014-04-09
CL2014000598A1 (es) 2014-11-21
PT2716462T (pt) 2017-07-11
UA110285C2 (en) 2015-12-10
US20140285604A1 (en) 2014-09-25
EP2716462B1 (fr) 2017-04-19
CA2850605A1 (fr) 2014-04-10
CA2850605C (fr) 2016-04-12
KR20140090146A (ko) 2014-07-16
AU2013311107A1 (en) 2014-04-24
MX2014004919A (es) 2014-07-16
WO2014053569A1 (fr) 2014-04-10
PL2755827T3 (pl) 2017-06-30
JP2015508337A (ja) 2015-03-19

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