ITPD20110104A1 - PROCEDURE FOR THE CONSTRUCTION OF CERAMIC SHEETS OF LARGE SIZE - Google Patents

PROCEDURE FOR THE CONSTRUCTION OF CERAMIC SHEETS OF LARGE SIZE Download PDF

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Publication number
ITPD20110104A1
ITPD20110104A1 IT000104A ITPD20110104A ITPD20110104A1 IT PD20110104 A1 ITPD20110104 A1 IT PD20110104A1 IT 000104 A IT000104 A IT 000104A IT PD20110104 A ITPD20110104 A IT PD20110104A IT PD20110104 A1 ITPD20110104 A1 IT PD20110104A1
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Italy
Prior art keywords
process according
decoration
raw materials
slabs
ceramic
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IT000104A
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Italian (it)
Inventor
Franco Billi
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Cooperativa Ceramica D Imola S C
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Application filed by Cooperativa Ceramica D Imola S C filed Critical Cooperativa Ceramica D Imola S C
Priority to IT000104A priority Critical patent/ITPD20110104A1/en
Priority to PCT/IB2012/000805 priority patent/WO2012137066A1/en
Publication of ITPD20110104A1 publication Critical patent/ITPD20110104A1/en

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    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/12Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
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    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • C04B33/132Waste materials; Refuse; Residues
    • C04B33/1324Recycled material, e.g. tile dust, stone waste, spent refractory material
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    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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Description

PROCEDIMENTO PER LA REALIZZAZIONE DI LASTRE CERAMICHE DI GRANDI DIMENSIONI PROCEDURE FOR MAKING LARGE CERAMIC SLABS

DESCRIZIONE DESCRIPTION

Il presente trovato ha per oggetto un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni. The present invention relates to a process for making large ceramic slabs.

E' sempre maggiormente sentita l'esigenza in campo edile di poter disporre di pannelli di grandi dimensioni che combinino capacità strutturali, di isolamento acustico, di isolamento termico, di resistenza superficiale ed al contempo superficialmente ornabili con colori, disegni, stampe a seconda dell'impatto visivo che con tali pannelli si desidera ottenere. The need in the construction field is increasingly felt to be able to have large panels that combine structural, acoustic insulation, thermal insulation, surface resistance capabilities and at the same time surface can be decorated with colors, designs, prints depending on the visual impact that you want to achieve with these panels.

In particolare, sono sempre più diffuse le tecniche di montaggio e posa a secco di lastre di grandi dimensioni atte ad andare a costituire direttamente delle pareti interne o delle pareti esterne. In particular, mounting and dry laying techniques for large-sized slabs are becoming more and more common and are suitable for directly forming internal or external walls.

Sul mercato sono ad oggi presenti prodotti che presentano, ognuno singolarmente, solo una o poche delle caratteristiche di capacità sopra elencate, e la gran parte non ha capacità di resistenza al fuoco. On the market today there are products that have, each individually, only one or a few of the above listed capacity characteristics, and most of them do not have fire resistance capacity.

Il compito del presente trovato à ̈ quello di mettere a punto un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, che combinino le sopra elencate capacità strutturali, di isolamento termico e acustico, con caratteristiche di leggerezza e resistenza al fuoco. The object of the present invention is to provide a process for making large ceramic slabs, which combine the above listed structural, thermal and acoustic insulation capabilities, with characteristics of lightness and fire resistance.

Nell'ambito di tale compito, uno scopo del trovato à ̈ quello di mettere a punto un procedimento che consenta di realizzare lastre ceramiche di grandi dimensioni il cui ornamento superficiale sia facilmente definibile su indicazione del committente. Within the scope of this aim, an object of the invention is to provide a method which allows to produce large-sized ceramic slabs whose surface ornament can be easily defined on the recommendation of the customer.

Un altro scopo del trovato à ̈ quello di mettere a punto un procedimento che impieghi materie prime facilmente reperibili sul mercato, e quindi capace di realizzare lastre ceramiche di grandi dimensioni di costi competitivi rispetto ad analoghi prodotti già presenti nel campo dell'edilizia. Another object of the invention is to provide a process which uses raw materials readily available on the market, and therefore capable of producing large-sized ceramic slabs at competitive costs with respect to similar products already present in the building field.

Non ultimo scopo del trovato à ̈ quello di proporre un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, ottenibile con impianti e tecnologie note. Not least object of the invention is to propose a process for making large ceramic slabs, obtainable with known systems and technologies.

Questo compito, nonchà ̈ questi ed altri scopi che meglio appariranno in seguito, sono raggiunti da un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, che si caratterizza per il fatto di comprendere le seguenti fasi operative: This task, as well as these and other purposes that will appear better later, are achieved by a process for the production of large ceramic slabs, which is characterized by the fact that it includes the following operating steps:

- miscelare ed omogeneizzare le materie prime; - mix and homogenize the raw materials;

- macinare le materie prime miscelate ed omogeneizzate fino ad una granulometria inferiore a 100 µm; - grind the mixed and homogenized raw materials to a particle size lower than 100 µm;

- granulare o atomizzare fino ad una granulometria tra i 100 µm ed i 600 µm; - granulate or atomise up to a particle size between 100 µm and 600 µm;

- laminare in continuo a bassa pressione ad ottenere un nastro di materiale ceramico umido; - continuously laminating at low pressure to obtain a strip of wet ceramic material;

- tagliare da detto nastro lastre crude di prestabilite dimensioni; - cutting raw sheets of predetermined dimensions from said belt;

- essiccare dette lastre crude; - drying said raw slabs;

- cuocere dette lastre crude. - baking said raw plates.

Ulteriori caratteristiche e vantaggi del trovato risulteranno maggiormente dalla descrizione di una forma di esecuzione preferita, ma non esclusiva, del procedimento secondo il trovato, esemplificato, a titolo indicativo e non limitativo, nella unita figura 1, la quale rappresenta schematicamente un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni secondo il trovato. Further characteristics and advantages of the invention will become clearer from the description of a preferred, but not exclusive, embodiment of the method according to the invention, exemplified, by way of non-limiting example, in figure 1, which schematically represents a method for manufacturing of large ceramic slabs according to the invention.

Con riferimento alla figura 1, un generico impianto per la realizzazione di un procedimento secondo il trovato à ̈ indicato nel suo complesso con il numero 10. With reference to Figure 1, a generic plant for carrying out a method according to the invention is indicated as a whole with the number 10.

Tale procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, comprende le seguenti fasi operative: This procedure for the production of large ceramic slabs includes the following operating steps:

- miscelare ed omogeneizzare, in un miscelatore A, da intendersi di tipo noto, le materie prime 11; - macinare fino ad una granulometria inferiore a 100 µm, e preferibilmente ad una granulometria di circa 75 µm, in un macinatore B, le materie prime miscelate ed omogeneizzate nel miscelatore A; - mixing and homogenizing the raw materials 11 in a mixer A, intended to be of a known type; - grind the raw materials mixed and homogenized in mixer A to a particle size lower than 100 µm, and preferably to a particle size of about 75 µm, in a grinder B;

- granulare o atomizzare fino ad una granulometria tra i 100 µm ed i 600 µm, tramite un dispositivo di atomizzazione C; - granulate or atomise up to a particle size between 100 µm and 600 µm, by means of an atomisation device C;

- laminare in continuo a bassa pressione ad ottenere un nastro 12 di materiale ceramico umido, preferibilmente ad una umidità inferiore al 10%; tale fase operativa à ̈ compiuta con macchine di laminazione in continuo a bassa pressione, indicate con D, per la realizzazione di lastre di formati variabili in funzione delle esigenze, fino ad oltre tre metri di lunghezza; - rolling continuously at low pressure to obtain a strip 12 of wet ceramic material, preferably at a humidity lower than 10%; this operational phase is carried out with continuous low pressure laminating machines, indicated with D, for the production of slabs of variable formats according to requirements, up to over three meters in length;

- tagliare da detto nastro 12, con attrezzature di taglio E, lastre crude 13 di prestabilite dimensioni; - cutting from said strip 12, with cutting equipment E, raw slabs 13 of predetermined dimensions;

- essiccare le lastre crude 13 trasportandole attraverso un essiccatoio F, da cui escono lastre essiccate 14; - drying the raw slabs 13 by transporting them through a dryer F, from which dried slabs 14 come out;

- cuocere in forno G dette lastre essiccate 14. - baking these dried plates in the oven G 14.

All'uscita dal forno G si presentano lastre cotte 15. At the exit from the oven G there are 15 baked slabs.

Le materie prime 11 comprendono 11 raw materials include

- materiale plastico argilloso, - clayey plastic material,

- materiali fondenti, tipo feldspati, - melting materials, such as feldspar,

- eventuali scarti di lavorazione, tipo scarti di vetro, scarti di lavorazioni di pietre, scarti di fonderia, da soli od in combinazione. - any processing waste, such as glass waste, stone processing waste, foundry waste, alone or in combination.

- eventuali altre materie prime diverse. - any other different raw materials.

In particolare, il materiale ceramico impiegato ha la seguente formulazione chimica: In particular, the ceramic material used has the following chemical formulation:

SiO2 58 - 73% SiO2 58 - 73%

Al2O3 5 - 20% Al2O3 5 - 20%

CaO 0,5 - 8% CaO 0.5 - 8%

MgO 0,3 - 4% MgO 0.3 - 4%

Na2O K2O 3 - 13% Na2O K2O 3 - 13%

Fe2O3 TiO2 1- 2% Fe2O3 TiO2 1- 2%

PbO BaO ZnO 0,1 - 2% PbO BaO ZnO 0.1 - 2%

ZrO2 0,1 - 1,4% ZrO2 0.1 - 1.4%

SiC 0,05 - 5% SiC 0.05 - 5%

con perdita al fuoco tra il 2% ed il 4%. with fire loss between 2% and 4%.

L'operazione di cottura à ̈ realizzata in forno industriale G, su lastre refrattarie o direttamente su rulli, a temperature tra i 900°C ed i 1250°C, con cicli tra i 30 minuti ed i 180 minuti. The cooking operation is carried out in an industrial oven G, on refractory plates or directly on rollers, at temperatures between 900 ° C and 1250 ° C, with cycles between 30 minutes and 180 minutes.

Il procedimento secondo il trovato può presentare una ulteriore fase operativa di decorazione a umido, prima della fase di cottura. The method according to the invention can present a further operating step of wet decoration, before the cooking step.

Tale fase di decorazione può essere realizzata tramite deposizione di uno o più strati di granulati contenenti ossidi coloranti, distribuiti per realizzare diverse geometrie e soluzioni estetiche. This decoration phase can be carried out by depositing one or more layers of granulates containing coloring oxides, distributed to create different geometries and aesthetic solutions.

Ulteriormente, il procedimento secondo il trovato può comprendere, in alternativa od in aggiunta alla sopra citata fase di decorazione a umido, una ulteriore fase operativa di decorazione, tramite tecniche ceramiche di decorazione a secco. Furthermore, the method according to the invention can comprise, alternatively or in addition to the aforementioned wet decoration step, a further operational decoration step, by means of ceramic dry decoration techniques.

In più, il procedimento secondo il trovato può comprendere una ulteriore fase operativa di finitura con tecniche di rettifica, taglio e levigatura a secco o a umido. In addition, the method according to the invention can comprise a further operative step of finishing with dry or wet grinding, cutting and polishing techniques.

Il procedimento secondo il trovato può inoltre comprendere una ulteriore fase operativa di finitura a freddo con smaltatura e decorazione con macchine digitali. The method according to the invention can also comprise a further operative step of cold finishing with enamelling and decoration with digital machines.

Si à ̈ in pratica constatato come il trovato raggiunga il compito e gli scopi preposti. In practice it has been found that the invention achieves the intended aim and objects.

In particolare, con il procedimento secondo il trovato à ̈ possibile realizzare lastre di elevate dimensioni, fino ad oltre tre metri di lunghezza, dimensionandole tramite tecniche di taglio in funzione delle esigenze applicative. In particular, with the method according to the invention it is possible to produce large-sized slabs, up to over three meters in length, dimensioning them by means of cutting techniques according to the application requirements.

In più, con il trovato si à ̈ messo a punto un procedimento che consente di realizzare lastre a densità definita in funzione delle caratteristiche richieste quali: resistenza meccanica, isolamento termico, isolamento acustico, assorbimento acustico. In addition, the invention has perfected a process that allows the production of slabs with a defined density according to the required characteristics such as: mechanical resistance, thermal insulation, acoustic insulation, acoustic absorption.

Con tale procedimento secondo il trovato si possono quindi ottenere lastre di grandi dimensioni con elevate caratteristiche di resistenza al fuoco e bassissimo contenuto di composti organici volatili, con elevate caratteristiche superficiali in termini di durezza, resistenza all’abrasione, resistenza agli agenti chimici, nonchà ̈ con una vasta gamma di soluzioni estetiche, con possibilità di personalizzare le superfici in funzione delle richieste del committente. With this method according to the invention it is therefore possible to obtain large-sized slabs with high characteristics of fire resistance and very low content of volatile organic compounds, with high surface characteristics in terms of hardness, resistance to abrasion, resistance to chemical agents, as well as ̈ with a wide range of aesthetic solutions, with the possibility of customizing the surfaces according to the client's requests.

Il procedimento secondo il trovato consente la realizzazione di lastre ceramiche di grandi dimensioni ad esempio per le seguenti applicazioni: rivestimento di pareti interne ed esterne, pareti ventilate, cappotti, controsoffittature, pavimenti, pavimenti sopraelevati, coperture, pannelli strutturali collaboranti per divisori o moduli di pareti interne o prefabbricate, barriere fonoassorbenti, isolamento termico acustico di forni e celle frigorifere, barriere o porte tagliafuoco, nonchà ̈ altre applicazioni dove serva un materiale leggero con caratteristiche di isolamento termico acustico e resistenza al fuoco, ed infine applicazioni dove siano richiesti prodotti a densità controllata in funzione di esigenze specifiche. The method according to the invention allows the production of large-sized ceramic slabs, for example for the following applications: lining of internal and external walls, ventilated walls, coats, false ceilings, floors, raised floors, roofs, collaborating structural panels for partitions or modules of internal or prefabricated walls, sound absorbing barriers, acoustic thermal insulation of ovens and cold rooms, fire barriers or doors, as well as other applications where a light material with characteristics of thermal acoustic insulation and fire resistance is required, and finally applications where products are controlled density according to specific needs.

Non ultimo, con il trovato si à ̈ messo a punto un procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, ottenibile con impianti e tecnologie note. Last but not least, the invention has perfected a process for making large ceramic slabs, obtainable with known systems and technologies.

Il trovato, così concepito, à ̈ suscettibile di numerose modifiche e varianti, tutte rientranti nell'ambito del concetto inventivo; inoltre, tutti i dettagli potranno essere sostituiti da altri elementi tecnicamente equivalenti. The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; moreover, all the details can be replaced by other technically equivalent elements.

In pratica, i materiali impiegati, nonché le dimensioni e le forme contingenti, potranno essere qualsiasi a seconda delle esigenze e dello stato della tecnica. In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.

Ove le caratteristiche e le tecniche menzionate in qualsiasi rivendicazione siano seguite da segni di riferimento, tali segni sono stati apposti al solo scopo di aumentare l'intelligibilità delle rivendicazioni e di conseguenza tali segni di riferimento non hanno alcun effetto limitante sull'interpretazione di ciascun elemento identificato a titolo di esempio da tali segni di riferimento. Where the features and techniques mentioned in any claim are followed by reference marks, such marks have been affixed for the sole purpose of increasing the intelligibility of the claims and consequently such reference marks have no limiting effect on the interpretation of each element. identified by way of example by these reference signs.

Claims (8)

RIVENDICAZIONI 1) Procedimento per la realizzazione di lastre ceramiche di grandi dimensioni, che si caratterizza per il fatto di comprendere le seguenti fasi operative: - miscelare ed omogeneizzare le materie prime (11); - macinare le materie prime miscelate ed omogeneizzate fino ad una granulometria inferiore a 100 µm; - granulare o atomizzare fino ad una granulometria tra i 100 µm ed i 600 µm; - laminare in continuo a bassa pressione ad ottenere un nastro (12) di materiale ceramico umido; - tagliare da detto nastro (12) lastre crude (13) di prestabilite dimensioni; - essiccare dette lastre crude (13); - cuocere le lastre essiccate (14). CLAIMS 1) Process for the production of large ceramic slabs, which is characterized by the fact that it includes the following operating steps: - mixing and homogenizing the raw materials (11); - grind the mixed and homogenized raw materials to a particle size lower than 100 µm; - granulate or atomise up to a particle size between 100 µm and 600 µm; - continuously laminating at low pressure to obtain a strip (12) of wet ceramic material; - cutting from said strip (12) raw sheets (13) of predetermined dimensions; - drying said raw slabs (13); - bake the dried plates (14). 2) Procedimento secondo la rivendicazione 1, caratterizzato dal fatto che dette materie prime (11) comprendono - materiale plastico argilloso, - materiali fondenti, tipo feldspati, - eventuali scarti di lavorazione, tipo scarti di vetro, scarti di lavorazioni di pietre, scarti di fonderia, da soli od in combinazione. - eventuali altre materie prime diverse. 2) Process according to claim 1, characterized in that said raw materials (11) comprise - clayey plastic material, - melting materials, such as feldspar, - any processing waste, such as glass waste, stone processing waste, foundry waste, alone or in combination. - any other different raw materials. 3) Procedimento secondo le rivendicazioni precedenti, caratterizzato dal fatto che il materiale ceramico impiegato ha la seguente formulazione chimica: SiO2 58 - 73% Al2O3 5 - 20% CaO 0,5 - 8% MgO 0,3 - 4% Na2O K2O 3 - 13% Fe2O3 TiO2 1- 2% PbO BaO ZnO 0,1 - 2% ZrO2 0,1 - 1,4% SiC 0,05 - 5% con perdita al fuoco tra il 2% ed il 4%. 3) Process according to the preceding claims, characterized in that the ceramic material used has the following chemical formulation: SiO2 58 - 73% Al2O3 5 - 20% CaO 0.5 - 8% MgO 0.3 - 4% Na2O K2O 3 - 13% Fe2O3 TiO2 1- 2% PbO BaO ZnO 0.1 - 2% ZrO2 0.1 - 1.4% SiC 0.05 - 5% with fire loss between 2% and 4%. 4) Procedimento secondo le rivendicazioni precedenti, che si caratterizza per il fatto che detta operazione di cottura à ̈ realizzata in forno industriale (G), su lastre refrattarie o direttamente su rulli, a temperature tra i 900°C ed i 1250°C, con cicli tra i 30 minuti ed i 180 minuti. 4) Process according to the preceding claims, which is characterized by the fact that said firing operation is carried out in an industrial oven (G), on refractory plates or directly on rollers, at temperatures between 900 ° C and 1250 ° C, with cycles between 30 minutes and 180 minutes. 5) Procedimento secondo le rivendicazioni precedenti, che si caratterizza per il fatto di comprendere una ulteriore fase operativa, prima di detta fase di cottura, di decorazione, tramite deposizione di uno o più strati di granulati contenenti ossidi coloranti, distribuiti per realizzare diverse geometrie e soluzioni estetiche. 5) Process according to the preceding claims, which is characterized in that it comprises a further operational step, before said firing step, of decoration, by depositing one or more layers of granulates containing coloring oxides, distributed to create different geometries and aesthetic solutions. 6) Procedimento secondo le rivendicazioni da 1 a 4, che si caratterizza per il fatto di comprendere una ulteriore fase operativa di decorazione, tramite tecniche ceramiche di decorazione a secco. 6) Process according to claims 1 to 4, which is characterized in that it comprises a further operative step of decoration, by means of ceramic dry decoration techniques. 7) Procedimento secondo le rivendicazioni precedenti, che si caratterizza per il fatto di comprendere una ulteriore fase operativa di finitura con tecniche di rettifica, taglio e levigatura a secco o a umido. 7) Process according to the preceding claims, which is characterized in that it comprises a further operating step of finishing with dry or wet grinding, cutting and polishing techniques. 8) Procedimento secondo le rivendicazioni precedenti, che si caratterizza per il fatto di comprendere una ulteriore fase operativa di finitura a freddo con smaltatura e decorazione con macchine digitali.8) Process according to the preceding claims, which is characterized in that it comprises a further operative step of cold finishing with enamelling and decoration with digital machines.
IT000104A 2011-04-07 2011-04-07 PROCEDURE FOR THE CONSTRUCTION OF CERAMIC SHEETS OF LARGE SIZE ITPD20110104A1 (en)

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