• 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:
    Manufacturing method and decoration of a mineral-filled resin shower tray with an outer coating, which is manufactured by applying an outer coating layer on the inner surface of a mold, casting a mineral-filled resin mixture on the mold, curing the mixture and drying, which comprises the previous stages of arranging a transfer film which comprises on one of its faces a pattern printed with ink on the inner cavity of the mold, vacuum thermoforming of the transfer film on the surface interior of the mold cavity and the subsequent stage of removing the film from the surface of the mineral-filled resin shower tray with exterior coating. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2811677A2
    申请号:ES202030758
    申请日:2020-07-21
    公开日:2021-03-12
    发明作者:Alemany Francisco Javier Andres
    申请人:Moldcom Composites S L U；
    IPC主号:
    专利说明:

    [0001] Manufacturing and decoration method of a mineral-filled resin shower tray with exterior coating and shower tray obtained by said method
    [0003] The object of the present invention is a method for manufacturing and decorating a mineral-filled resin shower tray whose main advantage is to save time and resources compared to other methods of manufacturing and decoration of mineral-filled resin shower trays and Gelcoat coating or polyurethane paint.
    [0005] State of the art
    [0007] Currently there are many types of shower trays, such as enameled steel shower trays, ceramic shower trays, acrylic shower trays, natural or composite stone shower trays, among others.
    [0009] One type of shower tray are trays formed by a mixture of resins and natural minerals, usually manufactured in a composition of mineral filler, such as marble or calcium carbonate and polyester or polyurethane resin, usually endowing this type of trays with an external coating. .
    [0011] Said outer coating can be made of a material known as Gelcoat, which is a material made from epoxy or polyester resins, created to confer a high quality finish on the visible surface of a composite material. This material provides waterproof characteristics. , durability, resistance to ultraviolet rays, resistance to degradation, resistance to hydrolysis, as well as adds color to the piece.
    [0013] Another material that can be used for the exterior coating of mineral-filled resin shower trays is polyurethane paint, which additionally provides the characteristics of high resistance to wear, good elasticity, and excellent ability to withstand heavy loads and weights without suffering deformation, or great resistance to impacts.
    [0015] For the manufacture of this type of mineral-filled resin shower trays with an exterior coating, first, an exterior coating layer is applied to the mold, usually with a thickness of less than 1 mm and preferably with a thickness of less than 500 microns. . The topcoat layer can be applied by brush, or more commonly applied by spray gun manually or automated. Subsequently, the mixture comprising the resin is poured onto the mold that already comprises the outer coating layer on its surface. Optionally, the mold with the mixture goes through a vibrating machine to eliminate bubbles and compact the material that forms the shower tray. Finally, the shower tray is passed through an oven to cure the mixture, and it is left to rest in special trolleys until it is completely stabilized.
    [0017] To obtain a colored shower tray, a mass pigmentation technique is used so that the color does not come off the tray, adding the pigments both to the mixture of resin and minerals and to the applied coating.
    [0019] When it is desired to obtain a complex decoration on the exterior surface of the shower tray, there are currently some techniques that allow the exterior decoration of a shower tray with complex patterns.
    [0021] An example is digital sublimation printing. There are mainly two problems with this technique. First of all, it is necessary to have adequate equipment for this purpose, such as an inkjet printer, special inks for sublimation, sublimation paper, and a transfer plate. First, an image is printed on the digital printer on the sublimation paper, and once printed the paper is placed on the surface of the shower tray. At that moment, the previously configured transfer plate is arranged with the necessary temperature, pressure and time and sublimation occurs, where the ink is activated by heat and goes from a solid to a gaseous state, penetrating the surface of the object. This technique presents a number of problems. One of the problems that it presents is that it has to be done once the shower tray has manufactured, which leads to an increase in the manufacturing time of the decorated shower tray. In addition, there is a need for additional space for the necessary equipment. Another problem is the impossibility of using sublimation on the exterior coating and mineral fillers plus polyester resin due to the high temperatures required by this process.
    [0023] Another technique that presents similar problems to those discussed in the previous paragraph is the hydroprinting technique. In this process, a water-soluble polyvinyl paper film or film is used, which contains the desired motif to transfer. Thanks to an activator, the film turns into ink, it is placed on the surface of the water and thanks to the pressure exerted by immersing the piece in this liquid, it adheres to the treated piece. This technique also entails an increase in the manufacturing time of the decorated shower tray, as well as the need to have adequate space to perform the procedure.
    [0025] There is a technique for the decoration of plastic parts by injection known as film insert molding, as described for example in document US5989480. In this technique, an insert film is used that is inserted into a cavity of the die of an injection mold and suctioned to conform to the shape of the cavity. After this step, the molten plastic is injected so that the insert film comprising the manufacturing and decoration pattern forms the surface of the part.
    [0027] The method described in the previous paragraph is not suitable for the decoration of mineral-filled shower trays with an exterior coating, since, being an injection molding, it does not allow the formation of a material formed by two layers as is the case of mineral-filled shower trays with exterior cladding. Furthermore, the fact that the insert layer conforms to the surface of the plate makes this layer easily detachable, and furthermore it is not suitable since it is desirable that the outer coating is the surface layer given its properties.
    [0029] The present invention provides, to avoid the problems mentioned above, a method of manufacturing and decorating a mineral-filled resin shower tray and exterior coating in which the printing of the manufacturing and decoration pattern is produced during the usual manufacturing process of the same, a great finish is obtained in the cavities, edges and curves of the interior surface of the mold, in addition to not requiring a a large amount of equipment, nor of additional time to those used in the manufacture of resin shower trays with mineral fillers and conventional exterior cladding.
    [0031] Explanation of the invention
    [0033] As explained, the present invention provides a method of manufacturing and decorating a mineral-filled resin shower tray with an exterior coating and a shower tray obtained by said method.
    [0035] The method of manufacturing and decorating a mineral-filled resin shower tray with an exterior coating consists of the following steps:
    [0037] • Application of the transfer film on the mold. The transfer film comprises on one of its faces the design to be applied on the surface of the shower tray printed in ink, said face being placed towards the inside of the mold cavity. According to one embodiment option, the transfer film used is one of the following:
    [0039] o Polycarbonate Film (PC)
    [0041] o Copolyester Film (PETG)
    [0042] o Water-soluble Polyvinyl Film
    [0044] o Vinyl Film
    [0045] • Vacuum thermoforming of the transfer film on the inner surface of the mold cavity. In this stage, the edges of the transfer film are clamped on the edges of the mold, heat is applied so that the transfer film softens so that when softened it can adapt to the shape of the mold, and the vacuum is preferably produced by suction. between the inner surface of the mold cavity and the transfer film
    [0046] • Application of the outer coating layer on the transfer film arranged in the inner cavity of the mold.
    [0047] • Pouring of the mineral-filled resin mixture into the inner cavity of the mold on the outer coating layer that makes up the shower tray.
    [0048] • Stages of curing and drying of the shower tray.
    [0049] • Removal of the film from the surface of the shower tray, the ink having been inserted into the outer coating layer.
    [0051] In this process, the ink is transferred from the film to the surface of the mineral-filled resin shower tray and exterior coating during the polymerization process of the same, so that the heat facilitates the transfer of the ink that penetrates between 3 and 25 microns in the surface layer of the piece, more specifically penetrates between 8 and 25 microns, and preferably penetrates between 10 and 15 microns, producing a quality finish and in which the decoration obtained does not come off the shower tray, maintaining the plate the properties that the outer coating layer gives it.
    [0053] Optionally, the process comprises a final stage of applying an external protective layer such as a lacquer or varnish.
    权利要求:
    Claims (14)
    [1]
    1. - Method of manufacture and decoration of a mineral-filled resin shower tray with an outer coating, which is manufactured by applying an outer coating layer on the inner surface of a mold, casting a mixture of resin with mineral load on the mold, curing of the mixture and drying, characterized in that it comprises the following previous stages:
    • Arrangement of a transfer film comprising on one of its faces an ink-printed pattern on the inner cavity of the mold, the face that does not comprise the ink-printed pattern being in contact with said inner surface of the mold cavity.
    • Vacuum thermoforming of the transfer film on the inner surface of the mold cavity;
    and characterized in that it comprises the following subsequent stages:
    • Removal of the film from the surface of the mineral-filled resin shower tray with exterior coating.
    [2]
    2. - Method of manufacture and decoration of a mineral-filled resin shower tray with Gelcoat coating, according to claim 1, characterized in that the transfer film is a Polycarbonate (PC) film.
    [3]
    3. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to claim 1, characterized in that the transfer film is a Copolyester film (PETG).
    [4]
    4. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to claim 1, characterized in that the transfer film is a water-soluble polyvinyl film.
    [5]
    5. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to claim 1, characterized in that the transfer film is a vinyl film.
    [6]
    6.- Method of manufacturing and decoration of a mineral-filled resin shower tray with an exterior coating, according to any of claims 1 to 5, characterized in that the application of vacuum is produced by suction of the transfer film from the interior surface from the mold cavity.
    [7]
    7. Method of manufacture and decoration of a mineral-filled resin shower tray with an exterior coating, according to any of claims 1 to 6, characterized in that the aspiration occurs through at least one hole made in the mold.
    [8]
    8. - Method of manufacturing and decoration of a mineral-filled resin shower tray with exterior coating, according to any of claims 4, 6 or 7 characterized in that the transfer film is removed from the exterior surface of the shower tray by means of a water wash after the manufacturing process has finished.
    [9]
    9. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to any of claims 1 to 8 characterized in that it comprises a final stage of application of an external protective layer.
    [10]
    10. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to claim 9 characterized in that the outer protective layer is a lacquer.
    [11]
    11. Method of manufacture and decoration of a mineral-filled resin shower tray with an exterior coating, according to claim 9, characterized in that the outer protective layer is a varnish.
    [12]
    12.- Manufacturing and decoration method of a mineral-filled resin shower tray with an exterior coating, according to any of the preceding claims, characterized in that the exterior coating is Gelcoat.
    [13]
    13. - Method of manufacture and decoration of a mineral-filled resin shower tray with exterior coating, according to any of claims 1 to 11, characterized in that the exterior coating is made of Polyurethane paint.
    [14]
    14. - Shower tray decorated according to the method of claims 1 to 13, characterized in that it comprises a decorative layer inserted into its surface layer with a depth of between 3 and 25 microns, more specifically between 8 and 25 microns, and preferably between 10 and 15 microns.
    类似技术:
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    JPS58217332A|1983-12-17|Manufacture of plastic shape with painted pattern
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    同族专利:
    公开号 | 公开日
    ES2811677R1|2021-05-20|
    WO2022018319A1|2022-01-27|
    ES2811677B2|2022-02-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5221073A|1975-08-09|1977-02-17|Dainippon Printing Co Ltd|Manufacture of figured reinforced plastic moulding|
    FR2684046B1|1991-11-26|1995-01-20|Claveau Jean Noel|
    ITMC20050125A1|2005-11-24|2007-05-25|S C Di Sampaolo Fabiola|INDUSTRIAL PROCEDURE FOR THE PRODUCTION OF FABRIC MARBLE ARTICLES, PRINTED IN THERMOFORMABLE MATERIAL.|
    JP2014030968A|2012-08-03|2014-02-20|Dainippon Printing Co Ltd|Decorative sheet and method for manufacturing decorative molded article using the same|
    ES1203787Y|2017-11-15|2018-04-18|World Elastomers Trade Sl|DECORATIVE PANEL FOR SHOWER TRAYS|
    法律状态:
    2021-03-12| BA2A| Patent application published|Ref document number: 2811677 Country of ref document: ES Kind code of ref document: A2 Effective date: 20210312 |
    2021-05-20| EC2A| Search report published|Ref document number: 2811677 Country of ref document: ES Kind code of ref document: R1 Effective date: 20210513 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES202030758A|ES2811677B2|2020-07-21|2020-07-21|Manufacturing and decoration method of a mineral-filled resin shower tray with external coating and shower tray obtained by said method|ES202030758A| ES2811677B2|2020-07-21|2020-07-21|Manufacturing and decoration method of a mineral-filled resin shower tray with external coating and shower tray obtained by said method|
    PCT/ES2021/070549| WO2022018319A1|2020-07-21|2021-07-21|Method for the manufacture and decoration of a mineral-filled resin shower tray with an external coating, and shower tray obtained by said method|
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