• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Procedure for producing reliefs by digital printing and digital printing machine, the method comprising providing a substrate (1) having a first digital printing (2) on one of its faces, applying a coating (3) on the face of the substrate (1) having the first digital print (2), partially dry the coating (3) with the first digital print (2) until a gelled state is obtained, make a second digital print (4) by deposition of ink drops, apply pressure on the coating (3) in a gelled state by means of an engraving roller (30) to obtain a three-dimensional structure, wherein the engraving roller (30) has an outer surface configured to receive the second digital impression (4), such that after applying the pressure the ink drops create gaps in the coating (3) in a gelled state to obtain the three-dimensional structure, and completely dry the coating (3) on which The three-dimensional structure has been obtained. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2730122A1
    申请号:ES201830446
    申请日:2018-05-07
    公开日:2019-11-08
    发明作者:Latorre Jesus Francisco Barberan
    申请人:Latorre Jesus Francisco Barberan；
    IPC主号:
    专利说明:

    [0001]
    [0002]
    [0003]
    [0004] Technical sector
    [0005]
    [0006] The present invention is related to digital printing, proposing a method for the realization of a three-dimensional structure on a substrate, especially on a sheet or panel-shaped substrate that is used as a decorative element of floors or furniture components. The invention is also directed to a high resolution digital printing machine for the realization of the three-dimensional structure on the substrate.
    [0007]
    [0008] State of the art
    [0009]
    [0010] It is known to carry out relief imitations using traditional printing techniques, looking for the prints to look as close as possible to the natural element that is imitated, which in the case of wood are the colors and texture of the same with the characteristic grain corresponding.
    [0011]
    [0012] In recent years, digital printing and inkjet laser technologies have displaced traditional printing techniques, allowing high quality printing to be made much cheaper. However, these printing techniques do not allow to give a textured appearance that is still sometimes considered desirable.
    [0013]
    [0014] To solve this problem, the digital embossing technique is known, which allows relief printing using digital printing techniques. For this, transparent photo-polymeric inks are used which are printed on a pigmented ink, creating an illusion of embossed printing, see for example ES2492693T3. Although this technique allows the creation of high-quality digital prints with an illusion of relief visible to the eye, they do not allow the creation of appreciable reliefs equally to the touch.
    [0015]
    [0016] There is therefore a need to obtain an alternative solution to obtain high quality digitally printed surfaces with a three-dimensional structure in relief appreciable to touch and sight.
    [0017]
    [0018] Object of the invention
    [0019]
    [0020] The aim of the present invention is to obtain decorative elements for floors, furniture components, or the like with digitally printed embossed textures that are appreciable to the touch and sight, so that the decorative element resembles as much as possible the natural element It is intended to imitate.
    [0021]
    [0022] Accordingly, an object of the invention is a method for producing reliefs by means of high resolution digital printing comprising the steps of:
    [0023]
    [0024] • supply a substrate that has a first digital print on one of its faces, • apply a coating on the face of the substrate that has the first digital print,
    [0025] • partially dry the coating with the first digital impression until a gelled state is obtained,
    [0026] • make a second digital impression by deposition of ink drops, • apply pressure on the coating in a gelled state by means of an engraving roller to obtain a three-dimensional structure,
    [0027] or where the engraving roller has an outer surface configured to receive the second digital impression with the deposition of ink drops, such that after applying the pressure the ink drops create gaps in the coating in gelled state to obtain the three-dimensional structure, and
    [0028] • completely dry the coating on which the three-dimensional structure has been obtained.
    [0029]
    [0030] The second digital printing with the deposition of ink drops is done according to the following steps:
    [0031]
    [0032] • reception of a data file with the first digital printing of the substrate,
    [0033] • identification of shapes and reliefs in the first digital printing,
    [0034] • deposition of the ink droplets according to the shapes and reliefs identified in the first digital printing, such that a positive relief is obtained which is pressed by the engraving roller against the coating in the gelled state defining a negative relief in the coating with which the three-dimensional structure is obtained.
    [0035]
    [0036] In this way, the second digital printing is used for pressure etching (embossing) the coating that is applied on the first digital printing of the substrate, whereby relief textures appreciable to the touch and sight are obtained on the substrate.
    [0037]
    [0038] According to an embodiment of the invention, the second digital printing with the deposition of ink drops is applied directly on the outer surface of the engraving roller. Thus, the roller has a rewritable behavior, so that different types of images and textures can be obtained without requiring having to use a textured engraving roller for each image that needs to be obtained.
    [0039]
    [0040] According to another embodiment of the invention, the second digital impression of the ink drop deposition is applied on an additional substrate which is pressed by the engraving roller against the coating. Said additional substrate also has a rewritable behavior and can be supplied in the form of a continuous band or in the form of a sheet between a supply roller and a sheet collection roller.
    [0041]
    [0042] The deposition of ink drops is removed after obtaining the three-dimensional structure on the coating, whereby the roller or the continuous web can be used to receive another digital print that can be applied to create a new three-dimensional structure. Preferably the deposition of the ink drops is removed by scratching and heat application.
    [0043]
    [0044] The deposition of the ink drops is carried out using ink ejectors, so that by combining the deposition of the various ejectors, the thickness and shape of the relief textures applied on the substrate can be controlled.
    [0045]
    [0046] Preferably, the partial and total drying of the coating is carried out using UV ultraviolet light or LED-UV light, although depending on the characteristics of the coating, air drying could even be used.
    [0047]
    [0048] Preferably the coating is a delayed drying varnish or glue that is especially adapted to be able to receive on it a negative relief that creates the structure three-dimensional
    [0049]
    [0050] Another object of the invention is the high resolution digital printing machine used to produce the reliefs, which comprises:
    [0051]
    [0052] • means for supplying a substrate that has a first digital print on one of its faces,
    [0053] • a unit for applying a coating on the face of the substrate having the first digital impression,
    [0054] • a first drying unit to partially dry the coating until a gelled state is obtained,
    [0055] • an engraving roller to apply pressure on the coating and obtain a three-dimensional structure,
    [0056] or where the engraving roller has an outer surface configured to receive a second digital impression with a deposition of ink drops, such that after applying the pressure the ink drops create gaps in the coating in a gelled state to obtain the three-dimensional structure,
    [0057] • a second drying unit to completely dry the coating on which the three-dimensional structure has been obtained.
    [0058]
    [0059] The second digital printing with the deposition of ink drops can be applied directly on the engraving roller or the machine can additionally comprise means for supplying an additional substrate on which the second digital printing with the deposition of ink drops is applicable. Said means comprise a set of rollers that direct the additional substrate with the second digital printing towards the engraving roller for applying pressure on the coating and obtaining the three-dimensional structure.
    [0060]
    [0061] The machine additionally comprises means for removing the ink drops from the second digital printing. In case the second digital printing is applied directly on the engraving roller, said means comprise scrapers for the removal of the ink droplets from the outer surface of the engraving roller, so that the roller can be reused to texture a new substrate. . In the event that the second digital printing is applied on the additional substrate, said means comprise a solvent unit through which the additional substrate is passed, or means of application of heat, or other similar system that allows the elimination of the second digital printing.
    [0062]
    [0063] The machine additionally comprises ink ejectors for the deposition of ink drops on the outer surface of the engraving roller or on the additional substrate, so that by means of superimposing ink drops different shapes can be obtained with which to texture the applied coating on the substrate.
    [0064]
    [0065] The drying units are UV ultraviolet light lamps, or LED-UV light lamps, which are specially configured to in one case partially gel the coating leaving it ready to be textured and in another case fully gel the coating while permanently maintaining the textured.
    [0066]
    [0067] Description of the figures
    [0068]
    [0069] Figure 1 shows an embodiment of the digital printing machine of the invention for the realization of reliefs on panels, where the digital printing with ink drops is applied directly on the engraving roller.
    [0070]
    [0071] Figure 2 shows an enlarged detail of the scraper that is used to remove the digital printing with ink drops that is applied on the engraving roller.
    [0072]
    [0073] Figure 3 shows a detail of the engraving roller obtaining the three-dimensional structure on the substrate coating.
    [0074]
    [0075] Figure 4 shows another embodiment of the digital printing machine of the invention for the realization of reliefs on sheets, where digital printing with ink drops is also applied directly on the engraving roller.
    [0076]
    [0077] Figures 5 and 6 show other embodiments of the digital printing machine of the invention where digital printing with ink drops is not applied directly on the engraving roller but on an additional substrate.
    [0078]
    [0079] Detailed description of the invention
    [0080] The object of the invention relates to a method and a machine for high-resolution digital printing of substrates (1) with which relief textures appreciable to touch and sight can be obtained, so that the substrate (1) printed it resembles as much as possible the natural element that it is intended to imitate.
    [0081]
    [0082] An exemplary embodiment of the digital printing machine for obtaining substrates with reliefs is shown in Figure 1. The different parts of the machine are described according to the progress of the substrate (1), that is in the direction from left to right as shown in the figures.
    [0083]
    [0084] The machine comprises means for supplying the substrate (1), the substrate (1) having a first digital impression (2) on one of its faces, a unit (10) for applying a coating (3) on the substrate face ( 1) having the first digital print (2), a first drying unit (20) to partially dry the coating (3), an engraving roller (30) to apply pressure on the coating (3) and obtain a three-dimensional structure and a second drying unit (40) to completely dry the coating (3) having the three-dimensional structure.
    [0085]
    [0086] The engraving roller (30) has an outer surface on which a second digital printing (4) is applied by deposition of ink drops, so that said second digital printing (4) is used to obtain the three-dimensional structure on the coating (3) in correspondence with the first digital printing (2) of the substrate (1).
    [0087]
    [0088] The second digital printing (4) that is applied on the engraving roller (30) allows the first digital printing (2) that is applied on the substrate (1) to be textured, so that the engraving roller (30) acts as a roller Rewritable being able to receive on its surface as many digital prints (4) as substrates (1) are intended to be textured.
    [0089]
    [0090] To apply the second digital printing (4) by means of ink drop deposition, ink ejectors (31) are used. The ink ejectors (31) that apply the second digital printing (4) on the engraving roller (30) can be part of the digital printing machine, or they can be an external unit to the machine, so that the second digital printing (4) is already applied on the engraving roller (30) of the machine during the relief application process.
    [0091] The machine has means (32) for removing the ink drops from the second digital printing (4), such as scrapers (see Figure 2). Thus, in case it is required to apply another type of texture on the substrate (1), it would be enough to remove the ink drops from the engraving roller (30) and reapply a new second digital printing (4). Said means (32) can incorporate a heat source that facilitates the removal of the ink drops.
    [0092]
    [0093] The scrapers are made of high quality steel strips specially designed for cleaning scrapers that have a high hardness edge to ensure that the scrapers perform proper cleaning of the engraving roller (30).
    [0094]
    [0095] The drying units (20; 40) are selected according to the type of coating (3) that is applied on the substrate (1). Preferably the drying units (20,40) are UV lamps, or LED-UV lamps.
    [0096]
    [0097] Preferably the coating (3) that is applied on the substrate is a delayed drying varnish or glue.
    [0098]
    [0099] Figure 1 shows a digital printing machine where a substrate (1) is provided in the form of a panel while in Figure 4 a digital printing machine is shown where the means for supplying the substrate are adapted to feed a substrate (1) in sheet format, such that said supply means have a substrate unwinding station (1) with digital printing (2) and a substrate winding station (1) with coating (3).
    [0100]
    [0101] Other digital printing machines according to the invention are shown in Figures 5 and 6. Said machines are identical to the machines of figures 1 and 4 where only the application form of the ink drops of the second digital printing (4) differs, since in the machines of figures 1 and 4 the second digital printing (4) is applied directly on the outer surface of the engraving roller (30), while in the machines of Figures 5 and 6 the second digital printing (4) is applied on an additional substrate (1a).
    [0102]
    [0103] Thus, the machines of Figures 5 and 6 comprise the means for supplying the substrate (1) with the first digital printing (2), the unit (10) for applying the coating (3) on the face of the substrate (1) having the first digital impression (2), the first drying unit (20) to partially dry the coating (3), the engraving roller (30) to apply pressure on the coating (3) and Obtain a three-dimensional structure and the second drying unit (40) to completely dry the coating (3) which has the three-dimensional structure.
    [0104]
    [0105] The machines of Figures 5 and 6 have means for supplying the additional substrate (1a), said means comprising a set of rollers that firstly direct the additional substrate (1a) towards the ink ejectors (31) that apply the second digital printing (4) on the additional substrate (1a), then direct the additional substrate (1a) towards a partial drying unit (33) of the second digital printing (4), then direct the additional substrate (1a) towards the engraving roller ( 30) to apply pressure on the coating (3), and finally direct the additional substrate (1a) towards the means (32) to remove the ink drops from the second digital print (4).
    [0106]
    [0107] Said means (32) are used to remove the ink drops from the second digital print (4) and to be able to use the additional substrate (1a) again to receive a new second digital print (4). The means (32) can be a solvent unit through which the additional substrate (1a), or heat application means, or any other similar system allowing the elimination of the second digital printing (4) is passed.
    [0108]
    [0109] The roller assembly for supplying the additional substrate (1a) of the machine of Figure 5 forms a closed path, so that the additional substrate (1a) is supplied in the form of a continuous web. Alternatively, the roller assembly of the machine of Figure 6 forms an open path, so that the additional substrate (1a) is supplied in sheet form between a supply roller and a sheet pick-up roller.
    [0110]
    [0111] Accordingly, for the realization of the reliefs, the substrate (1) in the form of a sheet or panel is first supplied, where the first digital impression (2) of the substrate (1) is arranged on its upper face. The substrate is passed through the unit (10) where the coating (3) is applied on the face of the substrate (1) having the first digital impression (2), immediately after the first drying unit (20) applies heat on the coating (3) to partially dry it until obtaining a gelled state suitable for deformation.
    [0112] After application of the coating (3) the substrate (1) is passed through the engraving roller (30) that is configured to receive on its surface the second digital print (4), directly or indirectly through the additional substrate (1a) , so that the roller (30) applies pressure on the coating (3) deforming it and obtaining in the coating (3) the three-dimensional structure that textures the first digital impression (2) of the substrate (1).
    [0113]
    [0114] The second digital impression (4) that is pressed by the engraving roller (30) is in a gelling (drying) state, such that when it comes into contact with the coating (3) it deforms it without adhering with it.
    [0115]
    [0116] Finally, the substrate (1) with the engraved coating (3) is passed through the second drying unit (40) to completely dry the coating (3) and obtain the substrate (1) with the desired texture and shape.
    [0117]
    [0118] If the coating (3) used is allowed by partial drying and / or total drying can be performed without heat application, leaving only the coating to air dry.
    [0119]
    [0120] The second digital print (4) with which the three-dimensional structure of the coating (3) is obtained has a correspondence with the first digital print (2) of the substrate (1), so that the second digital print (4) corresponds to a series of shapes that are expressly printed on the engraving roller (30), or on the additional substrate (1a), to texture and highlight the desired areas of the first digital print (2) with which the substrate is printed ( 1).
    [0121]
    [0122] In order to obtain the ink drop deposition of the second digital printing (4) a control unit is used which firstly is responsible for receiving a data file containing information on the first digital printing (2) with which it is printed the substrate (1), and which is intended to be textured. The control unit is in charge of identifying shapes and reliefs in the first digital printing (2), which in case of wanting to give the substrate a wooden appearance (1) can correspond to knots or veins, and according to said identification commands the ejectors of ink (31) to deposit the ink drops on the surface of the engraving roller (30) or on the additional substrate (1a).
    [0123]
    [0124] Thus, as shown in detail in Figure 3, the ink droplets of the second digital printing (4) deposited on the engraving roller (30), or if necessary on the additional substrate (1a), define a positive relief, and after applying pressure on the coating (3) in a gelled state said positive relief defines a negative relief on the coating (3) that gives rise to the three-dimensional structure.
    权利要求:
    Claims (14)
    [1]
    1. - Procedure for producing reliefs by digital printing, characterized in that it comprises the steps of:
    • supply a substrate (1) that has a first digital print (2) on one side,
    • apply a coating (3) on the face of the substrate (1) that has the first digital impression (2),
    • partially dry the coating (3) with the first digital impression (2) until a gelled state is obtained,
    • make a second digital impression (4) by deposition of ink drops, • apply pressure on the coating (3) in a gelled state by means of an engraving roller (30) to obtain a three-dimensional structure,
    or where the engraving roller (30) has an outer surface configured to receive the second digital impression (4) with the deposition of ink drops, such that after applying the pressure the ink drops create gaps in the coating (3) in gelled state to obtain the three-dimensional structure, and
    • completely dry the coating (3) on which the three-dimensional structure has been obtained.
    [2]
    2. - Procedure for producing reliefs by digital printing, according to claim 1, characterized in that the second digital printing (4) with the deposition of ink drops is carried out according to the following steps:
    • reception of a data file with the first digital print (2) of the substrate (1), • identification of shapes and reliefs in the first digital print (2),
    • deposition of the ink drops according to the shapes and reliefs identified in the first digital print (2), such that a positive relief is obtained which is pressed by the engraving roller (30) against the coating (3) in the state gelled defining a negative relief in the coating (3) with which the three-dimensional structure is obtained.
    [3]
    3. - Procedure for producing reliefs by digital printing, according to any one of the preceding claims, characterized in that the second digital printing (4) with the deposition of ink drops is applied directly on the outer surface of the engraving roller (30).
    [4]
    4. - Procedure for producing reliefs by digital printing, according to any one of claims 1 to 2, characterized in that the second digital printing (4) with the deposition of ink drops is applied on an additional substrate (1a) which is pressed by the engraving roller (30) against the coating (3).
    [5]
    5. - Procedure for producing reliefs by digital printing, according to any one of the preceding claims, characterized in that the deposition of ink drops is removed after obtaining the three-dimensional structure on the coating (3).
    [6]
    6. - Procedure for producing reliefs by digital printing, according to the preceding claim, characterized in that the deposition of the ink drops is removed by scratching and application of heat.
    [7]
    7. - Procedure for producing reliefs by digital printing, according to any one of the preceding claims, characterized in that the deposition of the ink drops is carried out using ink ejectors (31).
    [8]
    8. - Procedure for producing reliefs by digital printing, according to any one of the preceding claims, characterized in that the partial and total drying of the coating (3) is carried out using UV light or LED-UV light.
    [9]
    9. - Method for producing reliefs by digital printing, according to any one of the preceding claims, characterized in that the coating (3) is a delayed drying varnish or glue.
    [10]
    10. - Digital printing machine to produce reliefs, characterized in that it comprises:
    • means for supplying a substrate (1) having a first digital print (2) on one of its faces,
    • a unit (10) for applying a coating (3) on the face of the substrate (1) having the first digital impression (2),
    • a first drying unit (20) to partially dry the coating (3) until a gelled state is obtained,
    • an engraving roller (30) to apply pressure on the coating (3) and obtain a three-dimensional structure,
    or where the engraving roller (30) has an outer surface configured to receive a second digital print (4) with a deposition of ink drops, such that after applying the pressure the ink drops create gaps in the coating (3) in gelled state to obtain the three-dimensional structure,
    • a second drying unit (40) to completely dry the coating (3) on which the three-dimensional structure has been obtained.
    [11]
    11. - Digital printing machine for producing reliefs, according to the preceding claim characterized in that it additionally comprises means for supplying an additional substrate (1a) on which the second digital printing (4) with the deposition of ink drops is applicable.
    [12]
    12. - Digital printing machine for producing reliefs, according to claim 10 or 11, characterized in that it additionally comprises means (32) for removing the ink drops.
    [13]
    13. - Digital printing machine for producing reliefs, according to any one of claims 10 to 12, characterized in that it additionally comprises ink ejectors (31) for the deposition of ink drops on the outer surface of the engraving roller (30) or on the additional substrate (1a).
    [14]
    14. - Digital printing machine for producing reliefs, according to any one of claims 10 to 12, characterized in that the drying units (20,40) are UV light lamps, or LED-UV light lamps.
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    同族专利:
    公开号 | 公开日
    ES2730122B2|2020-03-12|
    WO2019215358A1|2019-11-14|
    EP3815912A1|2021-05-05|
    EP3815912A4|2022-02-09|
    CN112105507A|2020-12-18|
    US20210245544A1|2021-08-12|
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201830446A|ES2730122B2|2018-05-07|2018-05-07|PROCEDURE FOR PRODUCING RELIEFS THROUGH DIGITAL PRINTING AND DIGITAL PRINTING MACHINE|ES201830446A| ES2730122B2|2018-05-07|2018-05-07|PROCEDURE FOR PRODUCING RELIEFS THROUGH DIGITAL PRINTING AND DIGITAL PRINTING MACHINE|
    US17/053,463| US20210245544A1|2018-05-07|2019-04-25|Method for producing reliefs by means of digital printing and digital printing machine|
    EP19800710.6A| EP3815912A4|2018-05-07|2019-04-25|Method for producing reliefs by means of digital printing and digital printing machine|
    PCT/ES2019/070281| WO2019215358A1|2018-05-07|2019-04-25|Method for producing reliefs by means of digital printing and digital printing machine|
    CN201980030739.8A| CN112105507A|2018-05-07|2019-04-25|Method for producing relief by means of digital printing and digital printing machine|
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