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EP1144180A1 - Procede et dispositif servant a fabriquer des dalles en materiau pierreux - Google Patents

Procede et dispositif servant a fabriquer des dalles en materiau pierreux

Info

Publication number
EP1144180A1
EP1144180A1 EP00903588A EP00903588A EP1144180A1 EP 1144180 A1 EP1144180 A1 EP 1144180A1 EP 00903588 A EP00903588 A EP 00903588A EP 00903588 A EP00903588 A EP 00903588A EP 1144180 A1 EP1144180 A1 EP 1144180A1
Authority
EP
European Patent Office
Prior art keywords
mix
slabs
stone material
manufacture
moulding
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00903588A
Other languages
German (de)
English (en)
Inventor
Marcello Toncelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1144180A1 publication Critical patent/EP1144180A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
    • B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
    • B29C67/244—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length by vibrating the composition before or during moulding

Definitions

  • the present invention relates to the manufacture of slabs of stone material and more specifically to an apparatus and a method for the manufacture of slabs of stone material consisting of a natural stone material in granular form and a binder.
  • the invention further relates to the slabs thus obtained.
  • Natural stone materials such as marble, granite, etc. are used in the form of slabs or panels, principally for paving and for wall facing.
  • Natural stone materials have several and undisputed aesthetic and mechanical properties, but their extraction and working are associated with many problems and drawbacks.
  • the first, and not inconsiderable problem is that of the rejects or wastage of the material extracted from the quarries: in general, not more than 20-30% of the material excavated is actually used.
  • a second problem is that of the sometimes significant differences between one block and another, so that it is not possible to obtain large areas of paving or facing which do not have aesthetic differences or at least differences in colour.
  • a third problem is that of the mechanical resistance to the stresses which these products must undergo both during working and after installation; for this reason, the slabs obtained from the quarry blocks generally have significant thicknesses (of the order of 3 cm and more) so that they are very heavy and not easy to handle.
  • a fourth problem is that of the contained dimensions of the slabs obtained from the quarry blocks which, together with the notable slowness of some basic operations such as sawing (the cutting speed of a sawing frame operating on a block of granite is generally not more than 5 cm/hour), renders the production and installation costs of these products very high, thereby limiting substantially their use on buildings of not inconsiderable commercial value.
  • the first attempt consisted in manufacturing cementitious products or tiles called "terrazzo", consisting of a granulate of natural stone material dispersed in a cementitious matrix.
  • a further drawback is that of the appearance which shows the presence of the cementitious binder, so that their use has always been linked to their low cost.
  • Another process for the manufacture of products in the form of tiles or slabs, designed and carried out on an industrial scale in recent years, provides for the preparation of a mix consisting of a granulate of natural stone material (reduced to a suitable particle size) and of a binder selected among binders of a cementitious nature and those based on a hardenable synthetic resin.
  • the resultant mix is subjected to a first moulding stage, for example by filling suitable dies, so as to form a layer of the desired thickness.
  • the die is then subjected to a mechanical compacting action (for example by the action of a plate press), maintaining the die under vacuum and at the same time applying a vibratory motion of predetermined frequency.
  • this operation begins under conditions which depend exclusively on the nature of the binder.
  • this operation comprises a first, setting phase, followed by a second, hardening phase, of conventional type in the field of cementitious products, for which the product in slab form is left to rest for the necessary time (of the order of a few days).
  • a binder consisting of a synthetic resin, such as, for example, a polyester resin
  • hardening takes place in a very short time, preferably in the presence of a catalyst with the simultaneous application of heat, or at ambient temperature, also adding to the catalyst a promoter.
  • a catalyst with the simultaneous application of heat, or at ambient temperature, also adding to the catalyst a promoter.
  • analogous technology there are also manufactured products in blocks intended subsequently for sawing into slabs, like the blocks of natural stone material extracted from quarries.
  • the moulding phase provides for producing on a temporary support a layer of desired thickness of the starting mix, to be subjected subsequently to mechanical compacting by means of a plate press, simultaneously applying a vibratory motion and maintaining the layer of material under a rather strong vacuum during the compacting phase. It is clear that the production of slabs of large dimensions raises not inconsiderable problems of industrial equipment.
  • a principal aim of the present invention is that of providing a simplified process and installation for the direct production of large size slabs made from a granulate of natural stone material, which may be very thin if desired and maintain the satisfying aesthetic and mechanical qualities of the slabs produced with the conventional method previously summarized.
  • a further aim of the present invention is that of providing a method and installation of the type indicated above which make it possible to use both a cementitious binder and a binder based on synthetic resin.
  • the resulting slabs have a bending strength markedly greater than that of the natural stone starting material (for example, in the case of granite, the bendinh strength of a slab obtained from natural granite varies between 9 and 15 N, while a slab according to the present invention, obtained from granulate of granite bound with cementitious binder has a bending strength between 14 and 18N), a low porosity (which results in a low water absorption and therefore a greater frost resistance), isotropy of the mechanical properties, and a lack of cracks of natural origin typically present in the slabs obtained directly from blocks of natural stone materials.
  • the natural stone starting material for example, in the case of granite, the bendinh strength of a slab obtained from natural granite varies between 9 and 15 N, while a slab according to the present invention, obtained from granulate of granite bound with cementitious binder has a bending strength between 14 and 18N), a low porosity (which results in a low water absorption and therefore a greater frost resistance), isotropy of the mechanical properties
  • the method and apparatus according to the present invention are characterized by the following features: (a)The starting mix, formed from a granulate of natural stone material having a controlled distribution of the particle size, and from the binder, is fed to a metering feed device capable of feeding the mix at a controlled rate of flow to a formwork for moulding the individual slabs, which formwork is in its turn characterized by the presence of a plurality of moulding chambers arranged side by side so that each chamber is in communication through a single upper opening with the outlet or discharge opening of said metering feed device.
  • the formwork is preferably capable of being disassembled so as to allow easy extraction of the hardened slabs from the individual moulding chambers.
  • moulding chambers which, being preferably arranged in a bundle, in effect constitute the formwork, have dimensions corresponding to those of an individual slab arranged vertically, with the major sides (those having dimensions of 3 metres and more) oriented horizontally and obviously the minor sides arranged vertically, and a thickness corresponding to that of the slab to be moulded.
  • the formwork is associated with means for generating a vibratory motion of predetermined frequency, so that the walls of the individual moulding chambers also have a vibratory motion imparted to them, but is spaced from the outlet or discharge opening of said metering feed device, so that the latter is not connected to said means for generating the vibratory motion and so that said mix, during its travel between said outlet opening and the mouth of each moulding chamber, travels for a short distance in free fall.
  • the apparatus besides the customary station for the mixing of the starting mix at atmospheric pressure and the hardening station, comprises a moulding and compacting station which consists of an upper section for metered feeding of the starting mix and of a lower section in which is located a removable formwork, there being associated with said lower section means for generating a vibratory motion of predetermined frequency, said formwork consisting of at least one, and preferably a plurality of, moulding chambers closed at the bottom, and having a filling opening located at the upper end in vertical alignment with said upper section, said upper and lower sections being enclosed in a casing associated with means for generating a vacuum inside it and, additionally, a predetermined distance being arranged between the mix discharge opening of said upper section and the mouth of each moulding chamber so that the mix fed in, travels in free fall and under the action of said vacuum for a predetermined distance before entering said mouth of the corresponding moulding chamber, thus effecting the de-aeration of the mix prepared at atmospheric pressure.
  • said formwork consists of a plurality of moulding chambers which, as already mentioned, define the space for the moulding of a slab "on edge", namely lying vertically with the minor sides perpendicular to the ground and the major sides obviously parallel to the latter.
  • Each moulding chamber is defined by a panel and by the rear surface of the immediately adjacent panel, each panel having peripherally a frame or peripheral support shoulder, preferably having inclined edges to facilitate the removal of the finished slabs, and of a predetermined thickness which defines the width of the moulding chamber and therefore the thickness of the slab which will be moulded therein.
  • this is obtained by grinding natural stone material, such as marble, granite, porphyry, etc. with a particle size range, the upper limit thereof is less than the thickness of the slab to be manufactured.
  • the maximum dimension of the particles forming the granulate is no more than a third of the thickness of the final slab and therefore of the moulding chamber.
  • This particle size range is selected in particular so that the starting mix has the maximum possible fluidity.
  • the particle size range may be determined by applying one of the known formulae, for example the Fuller formula or the Bohlomy formula.
  • the binder is selected from cementitious binders and those based on hardenable synthetic resin.
  • the starting mix is prepared by mixing the granulate with cement, preferably Portland cement with a clinker content of not less than 96%, optionally with the addition of calcium carbonate having the function, known per se, of preventing the separation of the water of the mix.
  • the quantity of cement is of the order of 10-13% by volume or a little more, based on the volume of the starting mix, and the water which is added, substantially equal in volume per cent to that of the cement, provides a ratio by weight between water and cement of the order of 0.30-0.32.
  • the volumetric ratio between constituents in powder form and water increases, bringing it above 0.50.
  • the granulate is mixed with a liquid resin in such a manner as to moisten all the granules.
  • the resin is preferably selected from polyester, epoxide and acrylic resins.
  • a hardening catalyst To the polyester and acrylic resins there is added a hardening catalyst and, depending on the hardening method, optionally other additives such as promoters (in the case where hardening takes place at ambient temperature).
  • promoters in the case where hardening takes place at ambient temperature.
  • the promoter is not necessary and the heat is sufficient to activate the action of the catalyst.
  • the starting mix must have a disaggregation, namely a low cohesion, sufficient to allow its de-aeration.
  • the mix thus prepared must then be fed to the moulding chambers present in the formwork described in detail hereinafter.
  • said feeding is carried out in such a manner that the mix is fed at a uniform rate of flow into the discharge section and regulated so that the filling of the moulding chambers takes place gradually, and so that before entering the mouth of each moulding chamber the mix travels for a short distance in free fall from the discharge opening of the metering feed device, so as to facilitate the de-aeration of the mix before it enters the moulding chambers.
  • said free fall of the mix takes place in an atmosphere maintained under a predetermined and rather strong vacuum.
  • the mix penetrates into the moulding chambers, being deposited on the closed bottom of the latter, it is subjected to the action of the vibratory motion applied to the formwork.
  • Said vibratory motion which is also transmitted to the vertical walls of the moulding chambers, has a multiple function, namely:
  • the formwork is extracted from the atmosphere under vacuum and transferred to the hardening zone.
  • hardening is complete (in a time which depends on the nature of the binder) the formwork is disassembled and the slabs positioned on vertical supports.
  • the actual hardening phase (which is completed in the following 5-6 days), is preferably preceded by the customary setting phase, characteristic of cementitious products, preferably controlling both during setting and during hardening phases the temperature and humidity of the atmosphere in which said phases are carried out,
  • the operations depend on the nature of the resin and on the catalyzed hardening conditions (with heating or in the presence of a promoter).
  • Figure 1 is a diagrammatic view in front elevation, partially in section, of the slab moulding station
  • FIG. 2 is a perspective view of one of the panels forming each moulding chamber
  • Figure 3 is a view in side elevation, partially in section, of an alternative embodiment of the container for metering and feeding the mix to the moulding chambers.
  • the slab moulding station of an installation for the manufacture of slabs with the method of the present invention is shown; this installation comprises a preparation station for the starting mix, a slab moulding station (indicated generally by the reference number 10) and finally a hardening zone or station. Since the characteristic and inventive features of the present invention are concentrated in the moulding station 10, for the other two stations, located respectively upstream and downstream of the moulding station, some general indications are sufficient, it being a question of features which are known £CT se.
  • a mixer operating at atmospheric pressure and equipped with agitators of conventional type.
  • the mixer is fed from above with the ingredients to be mixed, namely granulate of natural stone material, previously provided with the desired particle size distribution, and ingredients of the binder.
  • the preparation of the starting mix takes place discontinuously, or in batches, after which the transfer to the slab moulding station takes place, preferably by means of a metering and feeding tank or container described in detail hereinafter.
  • the slab moulding station comprises a casing or bell 12 which defines a chamber 14 connected to means, not shown, capable of generating inside it a vacuum of predetermined value (preferably of the order of 10-40 mbar of residual pressure).
  • a vibrating structure (indicated as a whole and generally by the reference number 16), comprising a vibrating table or platform 18 mounted resiliently with respect to the bottom 13.
  • this resilient suspension of the vibrating table is represented by two compression springs 20 mounted between the table 18 and the bottom 13 and calibrated so as to ensure the free vibration of the table 18.
  • Beneath the vibrating table 18 two compartments 22 are provided, not communicating with the inside of the chamber 14, and in which there are housed two vibrating machines 24 of conventional type (for example of the type with unbalanced rotating masses) that in the embodiment shown are arranged so as to be contra-rotating and therefore to generate a unidirectional vibration (which in the present instance is directed vertically).
  • the unidirectional nature of the vibration does not constitute an indispensable condition for the method of the present invention.
  • the two compartments 22 are isolated from the inside of the chamber 14 for the purpose of preventing the motors of the two machines generating the vibratory motion from being needlessly subjected to the effect of the vacuum, which does not favour the functioning of electric motors in general.
  • they are connected by means of an air circulation pipe to the outside air to ventilate and cool the vibrating machines.
  • the moulding chambers are formed and bounded by panels 30 of light, non-stick material, such as, for example, polypropylene, so that their handling presents no problem.
  • panels 30 of light, non-stick material such as, for example, polypropylene
  • Each panel 30 comprises a flat wall 32, the front face 32 of which is framed on three sides by a shoulder 34, which has inclined edges so as to allow the removal of the hardened slabs and has a thickness corresponding to that of the slab to be moulded, and the inner cavity of which has the dimensions of the slab itself.
  • each moulding chamber 30 is defined by the face 32 of a panel 30 and by the rear face 36 of the panel immediately opposite, with respect to which the shoulder also acts as a spacer.
  • the formwork 26 consists of a bundle of panels 30 held clamped to one another by way of any mechanical device which can be disassembled and reassembled.
  • this device consists of a U-shaped bracket or tie 38 made of metal, provided with two straps or shackles 40 capable of being engaged by a carriage for the introduction and extraction of the formwork 26 with respect to the chamber 14.
  • two wheels 42 are provided for the running of the carriage (not shown) capable of engaging the bracket 38 for the extraction of the formwork 26, once the filling of the moulding chambers is completed, and the introduction of a new formwork.
  • the casing 12 will be provided with a vacuum sealed door (not shown) and will have a suitable extension in a direction perpendicular to the plane of Figure 1 to allow the movements of introduction and extraction of the formworks.
  • a device for the metered feeding of starting mix comprising a container 44 provided with vertical lateral walls 46, having a flared portion 47 at the upper edges, and with a base 48; the base 48 is provided with means, for example with directable blades, for the metered discharge of the mix 50 contained in the container.
  • the support brackets 45, and with them the container 44 do not bear on the formwork, so that the vibratory motion to which the formwork is subjected is in no way transmitted to the container and to the mix 50 contained therein.
  • Two lipped gaskets 52 prevent the mix from overflowing out of the upper surface of the formwork and therefore of the mouths of the moulding chambers 28.
  • the casing 12 Corresponding to the position of the container 44, the casing 12 has an aperture 54 for the introduction and extraction of the container, which is uniformly filled with well levelled mix 50, and a sealed lid 56, provided with suitable peripheral gaskets, closes the casing and thus the chamber 14, preventing any communication with the outside. From Figure 1 it can easily be seen that between the base of the container 44 and the mouth of the moulding chambers 28 a certain space is left, in which the mix is subjected to a free fall and at the same time is subjected to the action of the vacuum to which the chamber 14 is subjected.
  • the method of the present invention is carried out through the following phases. Firstly, there is prepared in air the mix of natural stone material granulate and of binder, continuing the mixing action until the mix is homogenous and fluid.
  • a container is filled with this mix, taking care that the mix is levelled and distributed uniformly in the container.
  • the chamber 14 is connected to the vacuum generating means (for example a vacuum pump) in order to reach the desired degree of vacuum.
  • the vacuum generating means for example a vacuum pump
  • a new formwork 26 is placed in the position for filling the moulding chambers.
  • the mix before reaching the mouth of the moulding chambers, travels for a short distance in free fall, where the vacuum prevailing in the chamber 14 takes effect, so that it is subjected to a de- aerating action. It is important to control the discharge flow rate of the mix through the bottom of the container
  • the vibratory motion set up in the meantime facilitates the descent of the mix to the bottom of each moulding chamber and the completion of the de-aeration of the mix itself before the arrival of more mix discharged from the container 44, and brings about perfect tamping of the mix within each chamber.
  • the container 44 for the metered feeding of fresh mix in which case it is possible to shorten the idle times by providing more than one container, so as to allow them to be filled with fresh mix in the mixing station while the moulding chambers are filled with mix contained in the container positioned in the chamber 14.
  • the formwork with the moulding chambers filled with tamped mix is transferred to the hardening station, where it is disassembled after the slabs moulded in the chambers have reached at least the minimum consistency for handling.
  • the panels 30 of the bundle forming the formwork are preferably made of non-stick plastics material, such as, for example, polypropylene, so that the separation of the slabs from the panels themselves does not entail any difficulty and/or damage to the raw slabs.
  • the slabs thus obtained have lengths which may be more than 3 metres by a width which may reach more than one metre, with the obvious economic and constructional advantages.
  • the difference relates to the base 58 which consists of a plurality of parallel rods 60 between which are placed half-cylinders 62, rotatable in a controlled manner between the closure position, shown in Figure 2, and the opening position in which the half-cylinders 62 are rotated through 90°, thus allowing the passage of the mix at a controlled and metered rate of flow.
  • the formulations as a rule comprise from 10.50 to
  • the starting mix also contains a fluidizer of known type for cementitious pastes and, as already mentioned, it is possible to add to the mix calcium carbonate up to 1% in volume, so as to reduce the level of the water/cement ratio.
  • formulations with aggregates consisting of quartz sands or silicas having a particle size up to 6 mm, for which preference is given to binders based on hardenable synthetic resins.
  • the filling of the moulding chambers is carried out to a level slightly above their mouth, so that the slabs at their upper end (in relation to the formwork), until the end of the hardening, remain joined to one another (with a comb arrangement) to be separated then individually in the finishing phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Adornments (AREA)

Abstract

Procédé consistant à préparer un mélange de départ constitué par un granulat dont les particules présentent une forme déterminée et par un liant à base de ciment ou d'une résine durcissante, à effectuer le mélange à l'air libre, à l'introduire librement et sous vide dans un coffrage (26) constitué par une pluralité de chambres de moulage (28) placées verticalement côte-à-côte, de manière à provoquer la désaération du mélange avant qu'il pénètre dans chaque chambre de moulage (28). On soumet le coffrage (26) à des vibrations, de sorte que ces vibrations agissant également sur les parois verticales des chambres de moulage (28) effectuent le compactage du mélange dans la chambre (28) et provoquent la désaération, ce qui permet aux dalles de durcir et d'être retirées du coffrage (26). De préférence, les chambres de moulage sont constituées par des panneaux verticaux (30) montés côte-à-côte en groupe et possédant un épaulement (34) périphérique le long de trois côtés, tandis que le quatrième côté, exempt d'épaulement, identifie l'ouverture servant à introduire le mélange dans la chambre de moulage (28). On obtient des dalles de dimensions supérieures à 3 mètres de longueur et à 1 mètre de largeur.
EP00903588A 1999-01-22 2000-01-19 Procede et dispositif servant a fabriquer des dalles en materiau pierreux Withdrawn EP1144180A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTV990008 1999-01-22
IT1999TV000008 IT1311813B1 (it) 1999-01-22 1999-01-22 Procedimento ed apparecchiatura per la fabbricazione di lastre inmateriale lapideo.
PCT/EP2000/000400 WO2000043192A1 (fr) 1999-01-22 2000-01-19 Procede et dispositif servant a fabriquer des dalles en materiau pierreux

Publications (1)

Publication Number Publication Date
EP1144180A1 true EP1144180A1 (fr) 2001-10-17

Family

ID=11420537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00903588A Withdrawn EP1144180A1 (fr) 1999-01-22 2000-01-19 Procede et dispositif servant a fabriquer des dalles en materiau pierreux

Country Status (3)

Country Link
EP (1) EP1144180A1 (fr)
IT (1) IT1311813B1 (fr)
WO (1) WO2000043192A1 (fr)

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DE10220206A1 (de) * 2002-05-06 2004-02-12 Quartz Technology Gmbh Plattenförmig gegossener Formstein und Verfahren zu seiner Herstellung
ITTV20030134A1 (it) * 2003-09-29 2005-03-30 Dario Toncelli Procedimento per la realizzazione di manufatti in lastra o pannello a due strati, e manufatti in lastre o pannelli con esso ottenibili.
ITTV20050068A1 (it) * 2005-05-19 2006-11-20 Luca Toncelli Procedimento ed impianto per la fabbricazione di blocchi di conglomerato in materiale lapideo o ceramico.
ITTV20050114A1 (it) * 2005-08-01 2007-02-02 Luca Toncelli Procedimento per la fabbricazione di manufatti in lastre in conglomerato di materiale lapideo e di un legante e lastra risultante.
WO2011012732A1 (fr) * 2009-07-27 2011-02-03 Cosentino, S.A. Procédé pour la fabrication de produits agglomérés pierreux non plats
IT1402310B1 (it) * 2010-09-18 2013-08-30 Imer S R L Materiale in pietra naturale frantumata, sua composizione e procedimento di realizzazione
US9073239B2 (en) 2011-08-23 2015-07-07 Christopher T Banus Vacuum vibration press for forming engineered composite stone slabs
US9221190B2 (en) 2011-08-23 2015-12-29 Christopher T Banus Production plant for forming engineered composite stone slabs
US9221191B2 (en) 2011-08-23 2015-12-29 Christopher T. Banus Vacuum vibration press for forming engineered composite stone slabs
EP2747967B1 (fr) * 2011-08-23 2015-10-07 Christopher T. Banus Presse vibrante à vide pour la formation de dalles de pierre composite
US9186819B1 (en) 2014-08-19 2015-11-17 Cambria Company Llc Synthetic molded slabs, and systems and methods related thereto
US9289923B1 (en) 2015-01-30 2016-03-22 Cambria Company Llc Synthetic molded slabs, and systems and methods related thereto
CN110077006A (zh) * 2019-04-30 2019-08-02 广州立杏科技有限公司 一种人造石制备装置
WO2022241275A1 (fr) 2021-05-13 2022-11-17 Cambria Company Llc Dalles de pierre texturées, systèmes et procédés
IT202200003389A1 (it) * 2022-02-23 2023-08-23 Bellamoli Granulati S P A Procedimento per la realizzazione di un listello decorativo e listello decorativo così ottenuto

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BE626308A (fr) * 1961-12-20
DE2408503A1 (de) * 1974-02-22 1975-09-04 Helmut Hoedt Verfahren und vorrichtung zur herstellung von kunststeinen und -platten
DE2437411A1 (de) * 1974-08-02 1976-02-19 Jiro Sakurai Verfahren zur herstellung von betongussteilen hoher dichte und niedriger durchlaessigkeit
JPS6437449A (en) * 1987-08-03 1989-02-08 Sony Corp Production of synthetic granite
ES2197985T3 (es) * 1996-01-29 2004-01-16 Marcello Toncelli Procedimiento de fabricacion de productos de losa cementosos.

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Also Published As

Publication number Publication date
ITTV990008A1 (it) 2000-07-22
IT1311813B1 (it) 2002-03-19
WO2000043192A1 (fr) 2000-07-27

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