RO132561A2 - Process for dyeing recomposed stone and decorative panels and finished products made using the said process - Google Patents

Abstract

The invention relates to a process for dyeing recomposed stone or decorative panels and to finished products made using the said process. According to the invention, the process comprises the stages of selecting the type of stone or panel which is to be dyed, programming the model which is to be printed and the type of dye, placing and fixing the pieces of recomposed stone or the panels onto the dyeing equipment plate, the mentioned equipment being provided with a printing device which allows the pieces of recomposed stone or the panels to be dyed with a difference of texture of ± 35 mm, drying the dyed pieces, analyzing the printed coloured pattern, packing the finished pieces and storing the same.

Description

PROCESS FOR COLORING THE RECONSTITUTED STONE TO THE DECORATIVE PANELS TO THE FINISHED PRODUCTS OBTAINED BY THIS PROCESS

The invention relates to a process for coloring reconstructed stone and decorative panels, as well as to finished products - reconstructed stones and decorative panels - obtained by this process.

A process is known for decorating natural or reconstructed stone, subject of the invention EP0770502, consisting in applying a drawing to the clean surface of the reconstructed stone or stone, for example photographic printing or reproduction on light paper. The paper is fixed to the surface of the stone with a water-based adhesive, for example, PVA, on which a pressure of 500 - 800 kg / sqm is applied for a period of 2 to 5 hours. The pressure can be applied by a layer of foam, rubber or other flexible material. A number of stone pieces for processing can be placed simultaneously in a press, framed between layers of flexible material. After the pressure is applied, the stone pieces are cut and cleaned according to the printed design and finally covered with a cellulose varnish. The disadvantages of this process consist in the low productivity, the low resistance in time of the color layer on the printed surface, in that it does not resist to the sun rays and by the fact that it cannot be used on / for strongly irregular surfaces.

The equipment of the Italian manufacturer Gruppo TecnoFerrari Sp.A. is also known. which prints horizontally tiles and tiles, applying various effects (matt, glossy), and can also use precious metals (gold, platinum); the equipment has compact dimensions (length less than 3 meters), adopting different solutions for the ink distribution system and using specific print heads; reduced installed power (max. 4 kW); specific solutions for fast movement on multiple glazing lines; color bars with custom ink distribution system for each application; the possibility to expand the number of colors; the possibility to use a three-color digital printing system on the wall tile lines;

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Also known is equipment from the same manufacturer, which can print tiles and tiles vertically. Characteristics: maximum print width: 700 mm; selectable print heads for each color bar; independent ink management for each bar; the possibility to print on vertical profiles variable between 1 and 70 mm.

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Also known is the SPOTLINE SLF1380UV UV flatbed printer, used for printing media: plexiglas, wood, metal, ceramics, stone, glass, aluminum, plastic, acrylics, EVA foam (plates), textiles, self-adhesive (PVC), corrugated cardboard, wallpaper , paper. The print head can be adjusted to a height of 90 mm; direct printing on rigid materials, no longer need to be printed on sticker later applicable on plexiglas or corrugated cardboard, ceramics, stone and wood, materials that can not be easily glued, so you can get a wide range of finished products (icons, personalized ceramics , tile and custom tile, etc.).

Also known are the EFI Cretaprint equipment for digital, color printing, of flat ceramic surfaces, for example ceramic wall and floor tiles, which differ only in the width of the printed surfaces (between 696 mm and 1365 mm) and the printing speed.

There is also known a manufacturing process for painting porcelain plates, patent CN 105620165 (A) - 2016-06-01, which includes the following steps: cutting of porcelain plates by model; polishing each porcelain plate; cleaning porcelain tiles; drying of porcelain tiles; spraying ground icing on porcelain tiles; drying the glaze from the ground; analyzing and correcting the model with a digital printer; printing the model on the porcelain plates with the digital printer; packing glazing is done on the front surfaces of the porcelain plates; overglaze preparation; spraying overglaze on porcelain tiles; baking overglaze; installation of porcelain plates according to the model; and the assembly of a painting frame according to the product design.

The common disadvantage of these equipments is that: i) they can print / color on a surface with a texture difference with a depth of about 5 mm; ii) print a small variation of patterns, iii) can memorize a small number of typefaces of the printing surface, iv) have limitations in recognizing large variations of different textures; v) current technology does not allow printing of the corners.

The technical problem solved by this invention is the use of a process that allows: i) printing / coloring of reconstructed stone and panels of 2016 00816

11/11/2016 Decorative with a Height of texture between +/- 35 mm; ii) printing / coloring a wide variety of models, iii) memorizing a large number of type-dimensions of the printing surface, iv) recognizing a large variation of different textures; v) printing / coloring the corners.

The process of coloring the reconstructed stone and of the decorative panels solves the stated technical problem, by using on the technological line a specialized equipment in the digital coloring of the reconstructed stone or of the decorative panels equipped with a printing device that allows to color the surface of the reconstructed stone pieces or of decorative panels with a height of texture between +/- 35 mm. For reconstructed stone corners or decorative panels the equipment can be additionally equipped with a 90 ° indexing device.

The advantages of this invention consist in the fact that, using the printing device that allows coloring the surface of reconstructed stone pieces or decorative panels with a height of texture between +/- 35 mm, as well as the color device with 90 ° indexer, attached - according to the technology of the equipment specialized in the digital coloring of the reconstructed stone or of the decorative panels, the process allows not only the digital coloring of textured models having a depth of up to 5 mm, but, in addition, a great diversity of other models, with great depths of texture, including corners, in the same single operation. As a result, the execution time of the complex parts is considerably reduced, the cost per unit of processed part being reduced accordingly.

According to the invention, the process of coloring the reconstructed stone and the decorative panels comprises the following stages: Step 1, choosing the type of reconstructed stone or decorative panels to be colored; Stage 2, programming the model to be printed on the reconstructed stone pieces or on the decorative panels and choosing the type of paint and color ranges; Step 3, placing and fixing the reconstructed stone pieces or decorative panels on the coloring equipment plateau; Step 4, coloring the reconstructed stone pieces or decorative panels on the coloring equipment plateau; for this stage, the equipment will be equipped with a printing device that allows coloring the surface of the reconstructed stone pieces or decorative panels with a difference

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11/11/2016 +/- 35 mm texture; shall be used, as printing technologies: KYOCERA KJ4C0360: 16 rows, 111 mm printing width, or XAAR 1003 GS6-GS12-GS40, or similar technologies, per se known; Step 4 ', if the type of reconstructed stone or decorative panels has in order and corner, then, the equipment will be equipped with a 90 ° color indexing device; Step 5, drying of colored pieces; Step 6, color pattern printing analysis; Step 7, program correction; Step 8, packing the finished parts and storing them.

Bibliography

- Patent EP0770502

- Patent CN 105620165

- http://www.tecnoferrari.it/

- http://www.efi.com/products/inkjet-printing-and-proofing/cretaprint-ceramic-tileprinters/

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PROCESS FOR COLORING THE RECONSTITUTED STONE ON THE PANELS

DECORATIVE IN THE FINISHED PRODUCTS OBTAINED BY THIS PROCESS

Claims (5)

1. Process for coloring the reconstructed stone and decorative panels, characterized in that it comprises the following stages: Step 1, choosing the type of reconstructed stone or decorative panels to be colored; Stage 2, programming the model to be printed on the reconstructed stone pieces or on the decorative panels and choosing the type of paint and color ranges; Step 3, placing and fixing the reconstructed stone pieces or decorative panels on the coloring equipment plateau; Step 4, coloring the reconstructed stone pieces or decorative panels on the digital coloring equipment platter; for this stage, the equipment will be equipped with a printing device that allows coloring the surface of the reconstructed stone pieces or decorative panels with a texture difference of +/- 35 mm; known printing technologies will be used; Step 5, drying of colored pieces; Step 6, color pattern printing analysis; Step 7, program correction; Step 8, packing the finished parts and storing them. 2. Process for coloring the reconstructed stone and the decorative panels, according to claim 1, characterized in that, in the case where the type of reconstructed stone or decorative panels has control and corner, then, after Step 4, the process will comprise the Stage 4 ', in which the digital coloring equipment will also be equipped with a 90 ° indexing coloring device; the other stages remain unchanged; 3. Process for coloring the reconstructed stone and the decorative panels, according to claim 1 or 2, characterized in that, in case the type of reconstructed stone or decorative panels has in order and corner, then the digital coloring equipment will be provided with a unique complex device that allows both the coloring of the surface of the reconstructed stone pieces or of the decorative panels with a difference of texture of +/- 35 mm, as well as the coloring with an index at 90 °; to 2016 00816 11/11/2016 4. Finished products - reconstituted stone and decorative panels - obtained by the process according to claims 1, or 3, characterized in that, on a depth of texture of +/- 35 mm, as well as on flat surfaces, they retain completely the quality and properties of the coating. with paint; 5. Finished products - reconstituted stone and decorative corner panels obtained by the process according to claims 2 or 3, characterized in that the reconstituted stone or the decorative panels completely preserve the quality and properties of the paint coating on both the horizontal surface and on the surface. the vertical one.