WO2020117082A4

WO2020117082A4 - Process for avoiding burrs when demoulding the reconstructed stone and decorative panels and finished products obtained through this process

Info

Publication number: WO2020117082A4
Application number: PCT/RO2019/000028
Authority: WO
Inventors: Mihai GAVRIŞ
Original assignee: Modulo Decorative Solutions S.R.L.
Priority date: 2018-12-07
Filing date: 2019-12-06
Publication date: 2020-09-10
Also published as: RO134243A2; WO2020117082A1; EP3890934A1

Abstract

The invention relates to a process for the avoidance of burrs when demoulding the reconstructed stone and decorative panels, as well as the finished products - reconstructed stones and decorative panels without burrs - obtained through this process. According to the invention, the process comprises the following steps: Step 1, selecting the type of reconstructed stone or decorative panel to be multiplied; Step 2, the assembly of natural stone slabs to a suitable size so that they can be manipulated - for example maximum 1m / 1m - so that, on one side, the surface with the desired pattern is obtained; Step 3, impregnating the surface with the desired pattern in a plastic mass that can take in depth the strips, the grooves, etc. specific to the natural stone - for example silicone rubber - in order to obtain the negative mould 1] Step 4, in the negative mould 1, a plastic mass different from that of the negative mould 1 is poured, with the same rendering qualities of the surface pattern on which it is poured, resulting one or more positive moulds 1 (fig. 1), which render/reproduce almost identically the surface of the natural stone slabs; the edges are bevelled from the inside, on the contour, about 2 - 10 mm x 45°; Step 5, with the positive mould 1, is impregnated at a certain temperature, a plastic mass of the same material as that of the negative mould 1, or another plastic mass having similar qualities to it, in order to obtain one or more negative moulds 2 (fig. 2), having a thickness between 10 - 100 mm; between the negative moulds 2 there are 10-50 mm decks which, on the contour, have an inner shoulder of 2 - 10 mm x 45° (fig.3). Step 6 in the negative mould/moulds 2 there will be poured the mixture of cement, plaster, etc., which is pressed with a press whose entire surface (of contact with the cement or plaster mixture) is substantially porous; by reinforcing the mixture, identical reconstructed stone tiles (fig. 4), and identical decorative panel tiles are obtained, which will have; a) a previous conventional surface, with the pattern, reproduced of natural stone; b) a significantly porous rear conventional surface that is placed on the wall and comes into contact with the binder; c) a finely processed contour surface by casting; d) the chamfering of 2 - 10 mm x 45° on the contour at the edge between the finely processed contour surface and the conventional porous rear surface. Due to the elasticity of the material of the negative mould/moulds 2, the slabs will be easily removed from the mould, without this/these deforming, or breaking; Step 7, control, packaging of finished parts and storage. By carrying out the process, finished products are obtained - reconstructed stone and decorative panel - without burrs, directly by casting and drying, having the edges between the contour surfaces and the conventional rear surface evenly bevelled and along the entire contour of the part, resulting, on the one hand, the increased degree of adhesion of the reconstructed stone slabs and the decorative panel slabs on the wall, mural, etc., because the soldering material (plaster) also enters the joints of the recessed edges, and on the other hand, the execution of the finished parts is considerably reduced, resulting in a cost per unit of processed part decreased accordingly.

Claims

AMENDED CLAIMS received by the International Bureau on 24 July 2020 (24.07.2020)

1. Process for avoiding the inner burrs when demoulding the reconstructed stone and decorative panels, characterized in that it comprises the following steps: Step 1 , selecting the type of reconstructed stone or decorative panel to be multiplied ; Step 2, assembly of natural stone slabs to a suitable size of maximum 1 m/1 m so that they can be handled, so that a conventional external surface with the desired pattern is obtained ; Step 3, impregnating the surface with the desired pattern in a plastic mass that can take in-depth the traces, the streaks and the troughs specific to the natural stone in order to obtain the negative mould 1 ; Step 4, in the negative mould 1 , a plastic mass different from that of the negative mould 1 is poured, with the same rendering qualities of the surface pattern on which it is poured, obtaining one or more positive moulds 1 (fig.1), which render / reproduce identically the surface of the natural stone slabs ; outer edges, corresponding to the intersection of the conventionally outer surface with the lateral surfaces, remaining unprocessed ; the inner edges, corresponding to the intersection of the side surfaces with the conventional inner surface, being bevelled on the contour, minimum 2 mm to maximum 10 mm x 45°; Step 5, a plastic mass of the same material as that of the negative mould 1, or another plastic mass having similar qualities with the positive mould 1, is impregnated at flow temperature in order to obtain one or more negative moulds 2 (fig.2), having a thickness between 10 - 100 mm ; between the side surfaces of negative moulds 2 being 10 - 50 mm decks which, on the contour, will have from casting an inner shoulder of minimum 2 mm and maximum 10 mm x 45° (fig.3). Step 6 in the negative mould/moulds 2 pour the mixture of cement and plaster,

8 which is pressed with a press whose entire surface of contact with the cement or plaster mixture is substantially porous ; by reinforcing the mixture, identical reconstructed stone tiles (fig. 4), and/or identical decorative panel tiles are obtained, which will have; a) a previous conventional outer surface, with the pattern reproduced of natural stone; b) a substantially porous inner conventional surface ; this surface will be placed on the wall and comes into contact with the binder; c) a finely processed contour surface from the casting; d) the chamfering of minimum 2 mm and maximum 10 mm x 45° on the contour at the inner edge between the finely processed contour surface and the conventional porous inner surface ; due to the elasticity of the material of the negative mould / moulds 2, the slabs being easily removed from the mould, without them being deformed or broken ; Step 7, control, packaging of finished parts and storage.

2. Finished product - reconstructed stone - as result by the process for the avoidance of the conventional inner burrs when demoulding reconstructed stone and decorative panels, characterized in that it is obtained without burrs, directly by casting and drying a mixture of cement or plaster that is poured in a negative mould 2 made of a plastic mass that can take in depth the traces, the streaks and the troughs specific to natural stone ; negative mould 2 whose upper edges have in section, on the entire upper contour, the negative shape of a uniform inner shoulder of minimum 2 mm and maximum 10 mm x 45° ;

3. Finished product - decorative panel - as result of the process for the avoidance of the conventional inner burrs when demoulding reconstructed stone and decorative panels, characterized in that it is obtained without burrs, directly by casting and drying a mixture of cement or plaster that is poured in a negative mould made of a plastic mass that can take in depth the traces, the streaks and the troughs specific to natural stone ; negative mould whose upper edges have in section, on the entire upper contour, the negative shape of a uniform inner shoulder of minimum 2 mm and maximum 10 mm x 45°

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