WO2020234149A1 - Procédé de production d'une surface décorative, notamment d'une pièce en bois - Google Patents

Procédé de production d'une surface décorative, notamment d'une pièce en bois Download PDF

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Publication number
WO2020234149A1
WO2020234149A1 PCT/EP2020/063599 EP2020063599W WO2020234149A1 WO 2020234149 A1 WO2020234149 A1 WO 2020234149A1 EP 2020063599 W EP2020063599 W EP 2020063599W WO 2020234149 A1 WO2020234149 A1 WO 2020234149A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
liquid
substance
unit
application
Prior art date
Application number
PCT/EP2020/063599
Other languages
German (de)
English (en)
Inventor
René Pankoke
Original Assignee
Hymmen GmbH Maschinen- und Anlagenbau
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 Hymmen GmbH Maschinen- und Anlagenbau filed Critical Hymmen GmbH Maschinen- und Anlagenbau
Priority to EP20726403.7A priority Critical patent/EP3758950A1/fr
Priority to CN202080000960.1A priority patent/CN112243411A/zh
Publication of WO2020234149A1 publication Critical patent/WO2020234149A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/02—Superimposing layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • B27K3/0292—Processes; Apparatus involving an additional treatment during or after impregnation for improving fixation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/15—Impregnating involving polymerisation including use of polymer-containing impregnating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/02—Staining or dyeing wood; Bleaching wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/043—Ornamental plaques, e.g. decorative panels, decorative veneers containing wooden elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B05D1/322—Removable films used as masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/02—Designs imitating natural patterns wood grain effects

Definitions

  • the present invention relates to a method for producing a decorative surface of a workpiece and a device for performing the
  • both solid wood floorboards and a so-called engineered floor i.e. a multi-layer parquet or an artificial parquet, which is created by gluing a thin layer of wood, sometimes less than 1 mm, to a carrier board
  • a so-called engineered floor i.e. a multi-layer parquet or an artificial parquet, which is created by gluing a thin layer of wood, sometimes less than 1 mm, to a carrier board
  • stain pigmented Liquids
  • These pickling liquids are brushed into the wood pores with so-called expeller rollers in order to also reach deeper points in the wood structure.
  • pickling liquids are pigmented in such a way that they are at least partially transparent and the wood look underneath can still be seen. With this method, for example, a light-colored plank becomes a
  • Pickling liquids are generated, e.g. Checkerboard pattern or something similar.
  • the installer has to mask it off with adhesive tape (comparable to painter's tape) and leave certain areas open. The open areas are then soaked with pickling liquid, and the pickling is removed again after a certain exposure time.
  • the idea behind the method according to the invention is therefore to use a very cheap wood, e.g. a birch veneer to create an optical "mahogany look veneer”.
  • the object of the present invention or of the method according to the invention is to find a simple and industrially feasible possibility of nevertheless generating certain desired patterns on a real wood surface without manual masking and thereby significantly reducing the time and costs per square meter.
  • a method for producing a decorative surface on a workpiece is provided with the following steps: Feeding the workpiece, the surface of which has wood or wood fibers at least in some areas, to a
  • cover substance being designed to at least partially seal the surface of the workpiece at the points where it was applied, the cover substance preferably being digitally printable;
  • liquid to the surface of the workpiece or to the covering substance, the liquid preferably being colored and
  • the interaction of the covering substance with the wood substrate is preferably limited to physical adhesion.
  • Cover substance on the surface of the workpiece is for the subsequent
  • the permeability of the liquid through the cover substance can preferably be controlled by the printed application amount of the cover substance. With a high application rate, the wood surface is almost completely sealed, with a lower application only partial masking; Wood pores,
  • control of the application amount of the covering substance is possible in terms of process technology. This can be done, for example, in a suitably designed
  • Cover substance application unit can be implemented.
  • the cover substance application unit uses digital and / or analog printing technology.
  • the surface adhesion of the acidic liquid on the wood is preferably also based on physical adhesion.
  • a characteristic of this is preferably the inadequate weathering resistance of dye stains, which is why the
  • Wood surface is usually still oiled or given a TopCoat.
  • a step for drying and / or fixing the covering substance is preferably carried out. This is preferably done by supplying heat and / or by means of
  • the supply of heat to the cover substance can preferably take place by means of hot air and / or by means of infrared radiation.
  • Radiation curing can preferably be radiated UV radiation onto the cover substance.
  • the cover substance is preferably applied to the surface of the
  • the drying and / or fixing is preferably equivalent to a partial, particularly preferably a complete, hardening of the covering substance.
  • a further step is preferably carried out in which the liquid is expelled by the liquid, preferably mechanically, particularly preferably with a
  • Expeller unit into which wood pores are distributed. This preferably improves the absorption of the liquid by the surface of the workpiece
  • the liquid is actively expelled into the wood pores, a portion of the liquid preferably being removed again from the surface of the workpiece. This portion is preferably not absorbable by the workpiece, since the workpiece is already saturated by absorbing the liquid.
  • the expulsion takes place preferably by means of a brush, particularly preferably by means of a
  • a further step is carried out by which the liquid is dried.
  • the drying takes place preferably by means of supply of heat and / or radiation curing.
  • the supply of heat to the liquid can preferably take place by means of hot air and / or by means of infrared radiation.
  • UV radiation can preferably be radiated onto the cover substance.
  • a further step is preferably carried out in which the covering substance is removed again. This is preferably done by sanding the surface of the
  • the covering substance is preferably at least partially applied using an at least partially transparent ink.
  • a highly transparent ink which does not contain any pigments is particularly preferably used for this purpose.
  • the at least partial application of the cover substance is preferably carried out according to a digital template. This is preferably done in such a way that after the liquid has been applied, it is only accepted in the unprinted areas of the underlying wooden surface of the workpiece or in the printed areas
  • the covering substance advantageously acts as a seal between the surface of the workpiece and the liquid.
  • the covering substance can accordingly
  • a masking pattern using a digital template in particular has the advantage of being able to switch quickly between different patterns, so that a large number of different patterns or even completely individual, non-repetitive representations can be generated in a short time.
  • the liquid preferably allows the wood grain to emerge more clearly on the entire surface of the workpiece, with the resulting
  • the at least partial application of the covering substance and / or the application of the liquid to the surface of the workpiece are / is preferably carried out at least one more time.
  • an optical influence or change in the surface of the workpiece can advantageously be achieved in that the liquid is applied several times at some points.
  • the covering substance can also be applied in a second pass to previously unmasked areas of the surface of the workpiece, so that the masking is changed before the liquid is applied a second time.
  • a further application could preferably also consist in coloring the wood or the wood fibers of the workpiece over the entire surface right at the beginning and then removing the excess, preferably then slightly sanding it if necessary. Only then does this take place on orders of the covering substance according to the
  • the overall color impression obtained is preferably a lower contrast between strong and less pronounced pigmentation.
  • the liquid is preferably exchanged for another liquid with a different composition with regard to dyes and / or color pigments and / or stain properties.
  • the application of the liquid to the surface of the workpiece is preferably carried out at least one more time, the liquid being applied each time is identical to the previous application at least with regard to the dyes and / or color pigments contained, the application being carried out several times at least at one point on the surface of the workpiece. In this way, a more intensive optical change of the workpiece surface can be achieved.
  • the workpiece or the liquid prefferably be dried between two application steps.
  • the step of applying the liquid is preferably carried out at least once before the at least partial application of the covering substance. In this way, the surface of the workpiece can already be applied before the
  • Cover substance can be changed in parts or over the whole area by the liquid.
  • a step is preferably carried out in which the surface of the workpiece is roughened at least partially, preferably over the entire area, the roughening preferably being carried out mechanically and / or chemically.
  • the mechanical roughening is preferably carried out with a rubbing and / or grinding device.
  • the chemical roughening is preferably done with a
  • the roughening has the advantageous effect that the capacity of the workpiece, at least on its surface, for the liquid is increased, so that the liquid or components contained therein, e.g. Color pigments, can more easily penetrate the workpiece.
  • the covering substance is preferably at least partially applied by means of digital printing technology and / or by means of analog printing technology.
  • Digital printing technology is preferably to be understood as meaning inkjet or digital print heads which, particularly preferably, can be arranged over the entire width of the workpiece in order to be able to reach the entire surface of the workpiece as far as possible.
  • Analogous printing technology is preferably to be understood as a printing roller which is designed to apply the covering substance by rolling it onto the surface of the workpiece according to a specific pattern.
  • the underlying cover substance is preferably applied between 1 g / m 2 and 10 g / m 2 , particularly preferably between 3 g / m 2 and 8 g / m 2 .
  • a further step is preferably carried out in which at least the liquid and / or the covering substance is removed from the surface of the workpiece.
  • the removed liquid is preferably excess liquid which can no longer be absorbed by the workpiece, since it is already saturated.
  • the liquid and / or the covering substance can preferably be actively removed. Active removal can in particular be understood to mean mechanical removal of the covering substance and / or the liquid with a brush and / or with a plane and / or with a grinding device.
  • the material of the workpiece is also removed.
  • a heat source such as e.g. a heater and / or a fan, which is designed to deliver hot air, and / or an infrared radiator can be used.
  • the liquid is preferably applied to the surface of the
  • a device for performing the method according to one of the preceding claims comprising:
  • a cover substance application unit which is designed to provide a
  • cover substance At least partially to the surface of the workpiece, the cover substance being designed to seal the surface of the workpiece at the points where it was applied;
  • a liquid application unit which is designed to apply a liquid to the surface of the workpiece, the liquid preferably being colored and preferably containing dyes and / or color pigments and / or having the properties of a stain;
  • a control unit which is designed to control the device accordingly in order to carry out the method as described above.
  • the device preferably also has a fixing unit which is designed to dry the cover substance and / or the liquid, the fixing unit preferably having a fan and / or a heat source and / or a UV radiation source for this purpose.
  • the device preferably also has a preparation unit which is designed to prepare, in particular roughen the surface of the workpiece, the preparation unit preferably having a roughening roller and / or a grinding device and / or a dispensing device for dispensing a roughening substance, such as a grinding paste . It can also be a
  • Sandblasting device or the like can be provided.
  • the device preferably also has a distributor unit which is designed to distribute the liquid on the surface of the workpiece, the distributor unit preferably having a brush for this purpose.
  • the device also has a post-processing unit which is designed to post-process the workpiece at least after the application of the covering substance and / or the liquid, the post-processing unit preferably having a grinding and / or planing device for this purpose.
  • the device also has a coating unit which is designed to coat the surface of the workpiece.
  • the coating can take place, for example, with a sealing lacquer layer, which is preferably applied to the workpiece in a last working step.
  • the coating unit preferably has a casting device which is designed to form a lacquer curtain through which the workpiece is guided.
  • the coating unit has an application roller which rolls off the surface of the workpiece and applies the paint there.
  • the coating unit has an immersion basin, the workpiece being at least partially immersed in this immersion basin for coating with paint.
  • the coating unit has digital printing technology which is designed to seal the workpiece by applying lacquer.
  • the device preferably also has a transport unit which is designed to feed the workpiece to at least some of the individual units, as described above.
  • the transport unit has this
  • the transport unit is preferably designed to feed the workpiece at least one more time to at least one of the individual units described above. In this way, method steps can be carried out several times with a single unit without the need for a further unit for the same
  • the device preferably has at least one of those described above
  • FIGS. 1a to 1c an embodiment of the method according to the invention
  • FIG. 3 shows a basic device for carrying out the
  • 1a to 1c show a first embodiment of the method according to the invention.
  • a workpiece 1 is shown in side view, which is designed here as a plate-shaped workpiece 1.
  • the workpiece 1 contains real wood or wood fibers at least in partial areas of the surface.
  • a covering substance 3 is applied to the upwardly facing surface of this workpiece 1.
  • the covering substance 3 is applied in such a way that at least parts of the surface of the workpiece 1 are covered by the covering substance 3.
  • the covering substance 3 acts as a seal on the surface of the workpiece 1, so that the surface of the workpiece 1 is sealed in the areas to which the covering substance 3 was applied.
  • the surface is thus masked for the next work step, i.e. parts of the surface of the workpiece 1 are still exposed.
  • Workpiece 1 is not completely given by the cover substance 3 (“open pores”), so that the liquid 4 can partially penetrate the masked areas, but the amount is reduced compared to the unmasked areas.
  • the liquid 4 is designed to change the surface of the workpiece 1, especially in interaction with the real wood or with the wood fibers of the surface, at least visually upon contact. This interaction or optical change occurs only in the liquid effective areas 2, which, starting from the areas of the surface of the workpiece 1, which are connected to the liquid 4 in Contact are, extend into the workpiece 1. In this way, an optical change of the workpiece 1 as such can be achieved here.
  • an interaction with the liquid 4 can also take place in the other areas of the surface (not in the liquid active areas 2), but in a relative manner. the places 2 reduced dimensions.
  • the cover substance 3 also partially penetrates into the workpiece 1.
  • FIGS. 1a to 1c show alternative possibilities of achieving the intermediate results shown in FIGS. 1a to 1c.
  • the application of the cover substance 3 takes place in the form of droplets 3a, which are marked here with a dashed border.
  • This can be done, for example, using digital printing technology, such as a digital print head 11.
  • the droplet release in particular with regard to the release volume of the droplets 3a, can be actively influenced.
  • Masking of the surface of the workpiece 1 by the cover substance is thus characterized by a high degree of variability in the masking pattern.
  • Cover substance 3 is designed, for example, as a digitally printable ink or digitally printable paint.
  • the application of the cover substance 3 can also take place by means of an analog printing technique, as shown in FIG. 2b.
  • the covering substance 3 can be applied to the surface of the workpiece 1 by means of an application roller 12, for example as an ink or lacquer.
  • the application roller 12 rolls on the surface of the workpiece 1 and leaves the covering substance 3 on the
  • the covering substance can preferably be applied using printing techniques. Ideally, but not necessarily, it will be used for
  • the liquid 4 can, for example, be applied over a large or full area.
  • a pouring device 21 is shown by way of example, which produces a curtain consisting of the liquid 4, through which the workpiece 1 masked with the cover substance 3 is conveyed.
  • the pouring device 21 has a reservoir in which the liquid 4 is stored and from which it is conveyed onto the surface of the workpiece 1, for example by means of a pump or, as shown, by means of a conveyor roller.
  • Another possibility (not shown) of applying the liquid 4 can be realized by an immersion basin into which the workpiece 1 is immersed at least with the masked surface.
  • the liquid 4 is applied to the masked surface by a roller application method.
  • FIG. 3 shows a basic device for performing the method according to the invention.
  • a cover substance application unit 10 is shown which is designed to apply the cover substance 3 to a workpiece 1, as shown in FIGS. 1 a to 2 c.
  • the cover substance application unit 10 has, for example, a digital print head 11, as shown in FIG. 2a, or an application roller 12, as shown in FIG. 2b. Downstream of the cover substance application unit 10 is a
  • Liquid application unit 20 is provided, which is designed to the
  • the liquid application unit 20 has, for example, a pouring device 21, as shown in FIG. 2c, or an immersion basin, or a roller application unit.
  • the fixing unit 40 is designed to allow drying of the Carry out cover substance 3 before the liquid 4 is applied.
  • the fixing unit 40 has, for example, a nozzle channel which allows hot air to flow onto the surface of the workpiece 1 or onto the cover substance 3.
  • a heat source in the form of an infrared radiation source or a heater can also be provided in order to dry the cover substance 3.
  • Fixing unit 40 can also have a UV radiation source, around the
  • a preparation unit 50 is provided, which is designed to prepare the surface of the workpiece 1 for the further process steps.
  • a preparation unit 50 is provided, which is designed to prepare the surface of the workpiece 1 for the further process steps.
  • a preparation unit 50 is provided, which is designed to prepare the surface of the workpiece 1 for the further process steps.
  • Roughening roller or a grinding device can be provided, which are designed to mechanically roughen the surface of the workpiece 1.
  • a dispensing device can also be provided here, which is designed to apply a cleaning agent, for example a chemical substance such as an acid, to the surface of the workpiece 1.
  • a cleaning agent for example a chemical substance such as an acid
  • the liquid application unit 20 is followed by a distributor unit 60 which is designed to distribute the liquid 4 on the surface of the workpiece 1 or to work it into the surface of the workpiece 1.
  • Distributor unit 60 can do this mechanically, for example.
  • the distributor unit 60 has, for example, a brush or roller brush that comes into contact with the surface of the workpiece 1 and moves relative to it
  • the dispenser unit 60 can also be in the form of multiple rotary brushes (with an axis perpendicular to the surface of the
  • a post-processing unit 70 is provided, which is designed to post-process the surface of the workpiece. This can for example done mechanically.
  • a grinding device can be provided which is designed to remove the surface of the workpiece 1, in particular the covering substance 3 and / or liquid 4 located thereon. In this case, material of the workpiece 1 itself is preferably also removed in order to avoid the optical
  • a coating unit 80 can be provided, which is designed to coat the surface of the workpiece 1. This can be done, for example, with a varnish that is applied over the entire surface, whereby a final sealing of the workpiece 1 is preferably carried out, so that the optical
  • the lacquer for sealing is therefore at least partially transparent.
  • Acrylate-containing UV-curing lacquers as well as oils or waxes can be used as sealing materials. Also water-based paint systems with subsequent thermal
  • the transport unit 90 has, for example, a transport belt, the units 10, 20, 30, 40, 50, 60, 70, 80 being arranged on the transport belt.
  • the device also has a control unit 30 in order to control the individual units 10, 20, 30, 40, 50, 60, 70, 80 and the transport unit 90 so that the method according to the invention can be carried out with the device.
  • the control unit 30 has, for example, a control means in the form of a control device which is designed by means of program code to carry out the method according to the invention.
  • the fixing unit 40, the preparation unit 50, the distribution unit 60, the post-processing unit 70, the coating unit 80 and the transport unit 90 are only to be understood here as optional units that are also omitted can be.
  • the device thus obtained then only has the
  • Cover substance application unit 10 the liquid application unit 20 and the control unit 30.
  • the process steps essential to the invention can also be carried out with such a device.
  • Feeding the workpiece 1 to the individual units 10, 20, 30, 40, 50, 60, 70, 80 by the transport unit 90 is also not absolutely necessary, since the units 10, 20, 30, 40, 50, 60, 70, 80 can be designed to move towards workpiece 1, for example.
  • the sequence shown for the units 10, 20, 30, 40, 50, 60, 70, 80 is also not absolutely necessary. Rather, other arrangements can also be provided here.
  • the fixing unit 40 can, for example, behind the
  • Liquid application unit 20 may be provided. It is thus able to fix not only the covering substance 3 but also the liquid 4, or even just the liquid 4, as already explained above.
  • Liquid application unit 20 can be provided in order to also apply the liquid 4 to the unmasked surface of the workpiece 1.
  • the trigger for the present invention was the surprising finding that ink, which was applied to partial areas of a workpiece made of real wood, then acts as a covering substance against a liquid, here a stain or a pigmented liquid.
  • a surprisingly positive effect of the printed ink was that the fiber structure of the wood surface underneath was not completely lost.
  • the wood structure was more clearly visible due to partial penetration of the stain than before the stain was applied.
  • the wood structure became much clearer, which was a very desirable effect. Therefore, for a more detailed understanding of the invention, specific embodiments of the invention will finally be described with reference to those explained above
  • a workpiece 1 the surface of which is at least partially made of real wood, is fed to a printing station, in which the surface of the workpiece 1 is completely or partially printed with a cover substance 3 in the form of a digitally printable ink.
  • a pigmented liquid 4 is then applied to this printed surface, the pigmented liquid 4 coming into contact in particular with areas that are not printed with the cover substance 3.
  • Cover substance 3 and the application of the pigmented liquid 4 can be a
  • Drying takes place by means of hot air, infrared and / or radiation curing.
  • the applied after the possible drying pigmented liquid 4 is with a
  • the pigmented liquid 4 applied in this way which preferably has caustic properties, can then be dried.
  • the surface of the workpiece 1 produced in this way can be sanded in such a way that the printed cover substance 3 is removed again and only the color pigments that have penetrated deeper into the wood structure are retained, thus creating a printed image.
  • a second application of a liquid 4 can also take place using a liquid 4 in the form of a highly transparent ink without any pigments.
  • the pigmented liquid 4 can only partially cover the underlying wood surface at the points where the wood surface is not applied with the covering substance 3, so that the wood pores, knotholes and other wood optics remain recognizable through a transparent layer.
  • the process steps for dye and liquid application are repeated several times, but at least twice, with the pigmented liquid 4 being exchanged in the second application step for another pigmented liquid 4 with other colored pigments so that a multicolored or at least two-colored image is created.
  • the process steps for coloring and liquid application are repeated several times, but at least twice, the pigmented liquid 4 containing the same color pigments as those of the preceding process steps and so other colors can be achieved in some places by double application.
  • the liquid 4 as a pickle has a vapor pressure at 20 ° C. of 23 hPA, a density at 20 ° C. of 1.01 g / cm 3 , a kinematic one
  • Viscosity at 20 ° C of 12 s (according to DIN 53211/4). It also contains 1.8% organic solvents, 92.7% water and the solids content is 5.4%.
  • the cover substance 3 is designed as Himalia03 TM ink.
  • the nominal volume of the droplets 3a from this cover substance 3 is 6 to 42 pL (using a Xaar GS6 TM print head). Depending on the working window, this volume can be increased to 8 to 56 pL.
  • the main components are: ⁇ 40 wt% 2- (2-ethoxyethoxy) ethylene acrylate, ⁇ 40 wt%
  • Trimethylolpropane, ethoxylated, esterified with acrylic acid ⁇ 40 wt%
  • Dipentaerythritol hexaacrylate contains no organic solvents, no water, no pigment or dye.
  • the covering substance 3 density 1.09 g / L at 20 ° C
  • the covering substance 3 of 1.3 g / m 2 (LeveM) to 8.9 g / m 2 (Level7) can be applied.
  • level information relates to the control of print heads in a digital application device.
  • the covering substance 3 also penetrates the wood substrate due to the low viscosity (kinematic viscosity 16 s, DIN 5321 1/4, 20 ° C.) and the pronounced capillary action of the wood fibers.
  • the initial boiling point of the covering substance 3 in is 101 ° C. and, according to the standard, does not hold any UV initiators.
  • the covering substance 3, however, is compatible for addition of a UV initiator and capable of photopolymerization.
  • the scratch hardness is not greater than 3 N.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé de production d'une surface décorative sur une pièce (1) comprenant les étapes suivantes : - Acheminement de la pièce (1), dont la surface présente du bois ou des fibres de bois au moins dans des zones partielles, vers une unité d'application de substance de couverture (10) et/ou vers une unité d'application de liquide (20) ; - application au moins partielle d'une substance de couverture (3) sur la surface de la pièce (1), la substance de couverture (3) étant conçue pour sceller au moins partiellement la surface de la pièce (1) aux endroits où elle a été appliquée, la substance de couverture (3) étant de préférence conçue pour être imprimable numériquement ; et - appliquer un liquide (4) sur la surface de la pièce (1), le liquide (4) étant de préférence coloré et contenant de préférence des colorants et/ou des pigments colorés et/ou ayant des propriétés de décapage. L'invention concerne également un dispositif destiné à mettre en œuvre le procédé.
PCT/EP2020/063599 2019-05-17 2020-05-15 Procédé de production d'une surface décorative, notamment d'une pièce en bois WO2020234149A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20726403.7A EP3758950A1 (fr) 2019-05-17 2020-05-15 Procédé de production d'une surface décorative, notamment d'une pièce en bois
CN202080000960.1A CN112243411A (zh) 2019-05-17 2020-05-15 用于制作特别是木质工件的装饰性表面的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019207277.1 2019-05-17
DE102019207277.1A DE102019207277A1 (de) 2019-05-17 2019-05-17 Verfahren zum Herstellen einer dekorativen Oberfläche insbesondere eines Holzwerkstückes

Publications (1)

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WO2020234149A1 true WO2020234149A1 (fr) 2020-11-26

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PCT/EP2020/063599 WO2020234149A1 (fr) 2019-05-17 2020-05-15 Procédé de production d'une surface décorative, notamment d'une pièce en bois

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EP (1) EP3758950A1 (fr)
CN (1) CN112243411A (fr)
DE (1) DE102019207277A1 (fr)
WO (1) WO2020234149A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989681A (en) * 1993-12-09 1999-11-23 Premdor, Inc. Semi-finished wood simulating product
US20170002228A1 (en) * 2015-06-30 2017-01-05 Widner Product Finishing, Inc. Sealing and finishing porous panel products and methods of production

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59831C (de) * H. BIEDER in Hamburg, Pferdemarkt 35 Holzbeiz-Verfahren
DE102005042658B3 (de) * 2005-09-08 2007-03-01 Kronotec Ag Bauplatte, insbesondere Fußbodenpaneel
CN101116982A (zh) * 2006-08-02 2008-02-06 庞雄乾 竹材表面着色的方法
ES2406358T3 (es) * 2008-10-22 2013-06-06 Fritz Egger Gmbh & Co. Og Elemento constructivo de material derivado de la madera con propiedades hápticas especiales y procedimiento para la fabricación de tal elemento constructivo
DE102010022160A1 (de) * 2010-05-20 2011-11-24 Rütgers Organics Gmbh Kennzeichnung von Holz
CN108381709A (zh) * 2018-03-01 2018-08-10 南京林业大学 一种实木的染色方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989681A (en) * 1993-12-09 1999-11-23 Premdor, Inc. Semi-finished wood simulating product
US20170002228A1 (en) * 2015-06-30 2017-01-05 Widner Product Finishing, Inc. Sealing and finishing porous panel products and methods of production

Also Published As

Publication number Publication date
CN112243411A (zh) 2021-01-19
EP3758950A1 (fr) 2021-01-06
DE102019207277A1 (de) 2020-11-19

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