ITMI20091775A1 - PROCEDURE FOR THE MANUFACTURE OF MANUFACTURED ARTICLES WITH A PARTICULARLY RECYCLED RUBBER BY TIRES, AS WELL AS IT IS IMPLEMENTED AND OBTAINED. - Google Patents

PROCEDURE FOR THE MANUFACTURE OF MANUFACTURED ARTICLES WITH A PARTICULARLY RECYCLED RUBBER BY TIRES, AS WELL AS IT IS IMPLEMENTED AND OBTAINED. Download PDF

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Publication number
ITMI20091775A1
ITMI20091775A1 IT001775A ITMI20091775A ITMI20091775A1 IT MI20091775 A1 ITMI20091775 A1 IT MI20091775A1 IT 001775 A IT001775 A IT 001775A IT MI20091775 A ITMI20091775 A IT MI20091775A IT MI20091775 A1 ITMI20091775 A1 IT MI20091775A1
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IT
Italy
Prior art keywords
thermoplastic resin
mixing chamber
recycled rubber
granules
tires
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Application number
IT001775A
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Italian (it)
Inventor
Maria Massimo De
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Maria Massimo De
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Priority to ITMI2009A001775A priority Critical patent/IT1395941B1/en
Publication of ITMI20091775A1 publication Critical patent/ITMI20091775A1/en
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Publication of IT1395941B1 publication Critical patent/IT1395941B1/en

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Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/74—Bypassing means, i.e. part of the molten material being diverted into downstream stages of the extruder
    • B29C48/745—Bypassing means, i.e. part of the molten material being diverted into downstream stages of the extruder for plasticising or homogenising devices
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

“PROCEDIMENTO PER LA PRODUZIONE DI MANUFATTI CON GOMMA RICICLATA PARTICOLARMENTE DA PNEUMATICI, NONCHÉ IMPIANTO PER LA SUA ATTUAZIONE E MANUFATTO OTTENUTO†⠀ œPROCESSION FOR THE PRODUCTION OF PRODUCTS WITH RECYCLED RUBBER PARTICULARLY FROM TIRES, AS WELL AS A PLANT FOR ITS IMPLEMENTATION AND OBTAINED PRODUCTSâ €

DESCRIZIONE DESCRIPTION

Il presente trovato si riferisce ad un procedimento per la produzione di manufatti con gomma riciclata particolarmente da pneumatici, nonché all'impianto per la sua attuazione ed al manufatto ottenuto. The present invention relates to a process for the production of articles with recycled rubber particularly from tires, as well as to the plant for its implementation and to the article obtained.

Come à ̈ noto, un problema attualmente molto sentito nella riutilizzazione di gomma riciclata, in particolare proveniente da pneumatici dismessi, à ̈ costituito dal fatto che la gomma può subire del degrado durante le varie lavorazioni, che, normalmente, prevedono di eseguire una premiscelazione tra granuli di gomma ed una resina termoplastica che viene normalmente introdotta in una quantità superiore al 30% del totale. As is known, a problem currently very felt in the reuse of recycled rubber, in particular coming from discarded tires, is constituted by the fact that the rubber can undergo degradation during the various processes, which, normally, involve performing a pre-mixing between rubber granules and a thermoplastic resin which is normally introduced in a quantity greater than 30% of the total.

Nella fase di successiva estrusione si ha che i frizionamenti che si realizzano sulla gomma provocano inevitabilmente dei surriscaldamenti che portano ad un degrado del prodotto. In the subsequent extrusion phase, the friction that occurs on the rubber inevitably causes overheating which leads to degradation of the product.

Inoltre, la percentuale relativamente elevata di resina termoplastica, oltre a penalizzare i costi, incide negativamente anche sulla densità del manufatto che si realizza, venendo così ad influire negativamente sulle sue caratteristiche di isolamento acustico. Furthermore, the relatively high percentage of thermoplastic resin, in addition to penalizing costs, also negatively affects the density of the manufactured product, thus negatively affecting its acoustic insulation characteristics.

Il compito che si propone il trovato à ̈ appunto quello di risolvere il problema sopra esposto, realizzando un procedimento per la produzione di manufatti con gomma riciclata, particolarmente da pneumatici, che dia la possibilità di ridurre drasticamente la quantità di resina termoplastica che viene miscelata con i granuli di gomma riciclata, evitando inoltre il verificarsi di surriscaldamenti che provocano il degrado della gomma. The aim of the invention is precisely that of solving the problem described above, realizing a process for the production of articles with recycled rubber, particularly from tires, which gives the possibility to drastically reduce the quantity of thermoplastic resin that is mixed with recycled rubber granules, also avoiding the occurrence of overheating which causes the rubber to degrade.

Nell'ambito del compito sopra esposto, uno scopo particolare del trovato à ̈ quello di realizzare un procedimento che dia la possibilità di controllare tutte le fasi operative, potendo realizzare un manufatto, ad esempio, in lastra, che presenta ottimali caratteristiche di isolamento acustico. Within the scope of the aforementioned aim, a particular object of the invention is to provide a method which gives the possibility of controlling all the operating phases, being able to produce an article, for example, in sheet metal, which has optimal acoustic insulation characteristics.

Ancora uno scopo del presente trovato à ̈ quello di realizzare un procedimento che, per le sue peculiari caratteristiche realizzative, sia in grado di dare le più ampie garanzie di affidabilità e sicurezza nell'uso. Another object of the present invention is to provide a process which, due to its particular constructive characteristics, is capable of giving the greatest guarantees of reliability and safety in use.

Non ultimo scopo del presente trovato à ̈ quello di realizzare un procedimento che sia ottenibile con fasi operative di normale realizzazione, giungendo all'ottenimento di un manufatto che risulta particolarmente vantaggioso da un punto di vista puramente economico. Not least object of the present invention is to provide a process which can be obtained with normal operating steps, thus obtaining an article which is particularly advantageous from a purely economic point of view.

Il compito sopra esposto, nonché gli scopi accennati ed altri che meglio appariranno in seguito, vengono raggiunti da un procedimento per la produzione di manufatti con gomma riciclata particolarmente da pneumatici, secondo il trovato, caratterizzato dal fatto di consistere nell'immettere, in una camera di miscelazione, granuli di gomma con un valore di pressione prossimo alla pressione atmosferica, nell'investire detti granuli di gomma con una resina termoplastica fusa in pressione per rivestire detti granuli, nell'immettere il materiale miscelato in una camera di raffreddamento ad una temperatura compresa tra 80 e 140°C e nel convogliare il materiale raffreddato verso una bocca di estrusione. The aforementioned aim, as well as the aforementioned purposes and others which will appear better later, are achieved by a process for the production of articles with recycled rubber particularly from tires, according to the invention, characterized in that it consists in introducing, in a mixing chamber, rubber granules with a pressure value close to atmospheric pressure, in investing said rubber granules with a thermoplastic resin melted under pressure to coat said granules, in introducing the mixed material into a cooling chamber at a temperature between 80 and 140 ° C and in conveying the cooled material to an extrusion mouth.

Ulteriori caratteristiche e vantaggi risulteranno maggiormente dalla descrizione di una forma di esecuzione preferita, ma non esclusiva, di un procedimento per la produzione di manufatti con gomma riciclata particolarmente da pneumatici, nonché dell'impianto per la sua attuazione, illustrato a titolo indicativo e non limitativo con l'ausilio degli uniti disegni in cui: Further characteristics and advantages will become clearer from the description of a preferred but not exclusive embodiment of a process for the production of articles with recycled rubber particularly from tires, as well as of the plant for its implementation, illustrated by way of example and not. limitative with the help of the accompanying drawings in which:

la figura 1 rappresenta schematicamente l'impianto secondo il trovato; Figure 1 schematically represents the plant according to the invention;

la figura 2 evidenzia in sezione ed in scala ingrandita il particolare della camera di miscelazione; e Figure 2 shows in section and on an enlarged scale the detail of the mixing chamber; And

la figura 3 rappresenta una sezione lungo la linea III-III di figura 2. Figure 3 represents a section along the line III-III of Figure 2.

Con riferimento alle citate figure, l'impianto per la produzione di manufatti con gomma riciclata particolarmente da pneumatici dismessi risulta costituito da una vite di estrusione, indicata globalmente con il numero di riferimento 1, la quale presenta una porzione iniziale 1a che si sviluppa da una tramoggia 2 di immissione di una resina termoplastica che, preferibilmente, ma non necessariamente, Ã ̈ costituita da un copolimero di vinilacetato. With reference to the aforementioned figures, the plant for the production of articles with recycled rubber, particularly from discarded tires, is constituted by an extrusion screw, globally indicated with the reference number 1, which has an initial portion 1a which develops from a hopper 2 for inlet of a thermoplastic resin which, preferably, but not necessarily, consists of a vinyl acetate copolymer.

La resina termoplastica, nella porzione iniziale 1a, viene sottoposta a convogliamento e riscaldamento sino a presentarsi allo stato fuso in corrispondenza di un tratto di arresto 10 della vite, a monte del quale à ̈ posto un condotto di passaggio 11 per la resina termoplastica fusa che si immette, con un valore di pressione compreso tra 70-120 bar, in una camera di miscelazione 20 a valle degli imbocchi 21 di immissione di granuli di gomma riciclata da pneumatici o da altri scarti tecnici e/o generici, connessi a tramogge del riciclato 22. The thermoplastic resin, in the initial portion 1a, is subjected to conveying and heating until it appears in the molten state in correspondence with a stop portion 10 of the screw, upstream of which there is a passage duct 11 for the molten thermoplastic resin which it is introduced, with a pressure value between 70-120 bar, into a mixing chamber 20 downstream of the inlets 21 for the injection of recycled rubber granules from tires or other technical and / or generic waste, connected to recycled hoppers 22.

La gomma viene immessa nella camera 20 sostanzialmente ad un valore di pressione prossimo al valore della pressione atmosferica e non viene sottoposta a frizionamenti particolari, in modo tale da essere fatta avanzare nella camera di miscelazione 20 sino alla zona di immissione della resina termoplastica fusa che viene immessa tramite doccioni 25 disposti circonferenzialmente che in pratica immettono a pressione la resina termoplastica fusa, così da rivestire i granuli di gomma al loro passaggio attraverso il doccione 25 con una percentuale di resina che risulta molto bassa rispetto all'insieme e che à ̈ valutabile all'incirca nel 10-18%. The rubber is introduced into the chamber 20 substantially at a pressure value close to the value of the atmospheric pressure and is not subjected to particular frictions, in such a way as to be made to advance into the mixing chamber 20 up to the inlet zone of the melted thermoplastic resin which is injected through gargoyles 25 arranged circumferentially which in practice put the melted thermoplastic resin under pressure, so as to coat the rubber granules as they pass through the gargoyle 25 with a percentage of resin which is very low compared to the whole and which can be evaluated approximately in 10-18%.

L'immissione della resina su granuli, che sono sostanzialmente a pressione atmosferica, consente di rivestire in pratica con un getto di resina fusa in pressione i granuli senza creare frizionamenti della gomma, che potrebbero provocare surriscaldamenti che la potrebbero degradare. The introduction of the resin on granules, which are substantially at atmospheric pressure, allows the granules to be coated with a jet of pressurized resin without creating friction of the rubber, which could cause overheating that could degrade it.

La vite 1 nella camera di miscelazione presenta un tratto di miscelazione 1b a valle del quale à ̈ previsto un tratto 1c di raffreddamento che passa all'interno di un raffreddatore 30 che ha la funzione di abbassare e mantenere la temperatura ad un valore compreso tra 80 e 140°C convogliando il prodotto miscelato verso la bocca di estrusione 40, in corrispondenza della quale à ̈ possibile prevedere una calandra a rulli 50 che provvede ad eseguire una lastra di prodotto utilizzabile per varie applicazioni e più specificatamente nel settore edilizio, dove la lastra ottenuta viene utilizzata come isolante acustico. The screw 1 in the mixing chamber has a mixing section 1b downstream of which there is a cooling section 1c which passes inside a cooler 30 which has the function of lowering and maintaining the temperature at a value between 80 and 140 ° C conveying the mixed product towards the extrusion mouth 40, in correspondence with which it is possible to provide a roller calender 50 which provides to make a sheet of product usable for various applications and more specifically in the building sector, where the sheet obtained is used as an acoustic insulator.

La lastra che si ottiene presenta una rigidità dinamica che, con uno spessore di circa 4,5 mm, à ̈ pari a 12-15 Mn/m<3>, che à ̈ inferiore ai normali prodotti utilizzati sul mercato che presentano tipicamente un valore di circa 40-50 Mn/m<3>. The slab obtained has a dynamic stiffness which, with a thickness of about 4.5 mm, is equal to 12-15 Mn / m <3>, which is lower than the normal products used on the market which typically have a of about 40-50 Mn / m <3>.

Inoltre, la lastra presenta una densità di circa 0,4-0,7 g/cm<3>. Furthermore, the plate has a density of about 0.4-0.7 g / cm <3>.

La calandratura del manufatto dà la possibilità di ottenere un prodotto a densità ridotta in quanto, per ottenere uno spessore finale della lastra di circa 5 mm, la distanza tra i cilindri del gruppo calandra 50 à ̈ di circa 2 mm, in quanto in questa fase vengono in pratica compressi i granuli di gomma che sono tra loro riuniti da una minima quantità di legante e, successivamente, i granuli di gomma, proprio per l'effetto elastico caratteristico della gomma, ritornano allo stato iniziale, per cui si ottiene una densità molto bassa, che consente di ottimizzare le caratteristiche di isolamento acustico. The calendering of the product gives the possibility to obtain a reduced density product since, in order to obtain a final thickness of the sheet of about 5 mm, the distance between the cylinders of the calender group 50 is about 2 mm, as in this phase in practice the rubber granules are compressed which are joined together by a minimum quantity of binder and, subsequently, the rubber granules, precisely due to the characteristic elastic effect of the rubber, return to the initial state, so that a very high density is obtained. low, which allows to optimize the acoustic insulation characteristics.

A completamento dell'insieme va segnalato che, in corrispondenza della camera di miscelazione, Ã ̈ possibile prevedere un imbocco ausiliario 60 per l'immissione di olio di processo o di un eventuale collante o ulteriore polimero. To complete the set, it should be noted that, in correspondence with the mixing chamber, it is possible to provide an auxiliary inlet 60 for the introduction of process oil or any glue or further polymer.

Inoltre, à ̈ anche possibile, in modo di per sé noto, prevedere dei fori di degasaggio in corrispondenza della zona ove avviene il raffreddamento del prodotto miscelato. Furthermore, it is also possible, in a per se known manner, to provide degassing holes in correspondence with the area where the cooling of the mixed product takes place.

Da quanto sopra illustrato si vede quindi come il trovato raggiunga gli scopi proposti, ed in particolare si sottolinea il fatto che, eseguendo la miscelazione immettendo della resina termoplastica fusa su un prodotto in granuli che à ̈ a pressione sostanzialmente atmosferica, si ha la possibilità di applicare in pratica un velo attorno ai vari granuli, velo che consente di costituire un legante che riunisce i granuli di gomma riciclata, portando ad un manufatto in cui i granuli non sono sottoposti ad alcuno stress o frizionamento che, provocandone il riscaldamento, potrebbe portare ad un degrado ed in cui la percentuale di resina termoplastica à ̈ molto bassa. From what has been illustrated above, it can therefore be seen how the invention achieves the intended aim and objects, and in particular it is emphasized that, by carrying out the mixing by introducing melted thermoplastic resin onto a granular product which is at substantially atmospheric pressure, it is possible to practically apply a veil around the various granules, a veil that allows the creation of a binder that brings together the recycled rubber granules, leading to a product in which the granules are not subjected to any stress or friction which, causing heating, could lead to a degradation and in which the percentage of thermoplastic resin is very low.

Inoltre, la possibilità di avere un'unica vite di estrusione che viene utilizzata sia per l'immissione della materia plastica sia per la fase di miscelazione, grazie al condotto di passaggio, consente di semplificare drasticamente l'impianto che viene utilizzato. Furthermore, the possibility of having a single extrusion screw which is used both for the introduction of the plastic material and for the mixing phase, thanks to the passage duct, allows to drastically simplify the system that is used.

Il trovato così concepito à ̈ suscettibile di numerose modifiche e varianti tutte rientranti nell'ambito del concetto inventivo. The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept.

Inoltre, tutti i dettagli potranno essere sostituiti da altri elementi tecnicamente equivalenti. Furthermore, all the details can be replaced by other technically equivalent elements.

In pratica, i materiali impiegati, purché compatibili con l'uso specifico, nonché le dimensioni e le forme contingenti potranno essere qualsiasi a seconda delle esigenze. In practice, the materials employed, so long as compatible with the specific use, as well as the contingent shapes and dimensions, may be any according to requirements.

Claims (9)

RIVENDICAZIONI 1. Procedimento per la produzione di manufatti con gomma riciclata particolarmente da pneumatici caratterizzato dal fatto di consistere nell'immettere, in una camera di miscelazione (20), granuli di gomma con un valore di pressione prossimo alla pressione atmosferica, nell'investire detti granuli di gomma con una resina termoplastica fusa in pressione per rivestire detti granuli al passaggio attraverso almeno un doccione (25) di immissione di detta resina termoplastica fusa, nell'immettere il materiale miscelato in una camera di raffreddamento (30) ad una temperatura compresa tra 80° e 140°C e nel convogliare il materiale raffreddato verso una bocca di estrusione (40). CLAIMS 1. A process for the production of articles with recycled rubber particularly from tires characterized by the fact that it consists in introducing rubber granules with a pressure value close to atmospheric pressure in a mixing chamber (20), in investing said granules of rubber with a thermoplastic resin fused under pressure to coat said granules when passing through at least one gargoyle (25) for the introduction of said fused thermoplastic resin, in introducing the mixed material into a cooling chamber (30) at a temperature between 80 ° and 140 ° C and in conveying the cooled material to an extrusion mouth (40). 2. Procedimento, secondo la rivendicazione precedente, caratterizzato dal fatto di realizzare, a valle di detta bocca di estrusione (40), una fase di calandratura per l'ottenimento di una lastra. 2. Process according to the preceding claim, characterized by the fact of carrying out, downstream of said extrusion mouth (40), a calendering step for obtaining a sheet. 3. Procedimento, secondo le rivendicazioni precedenti, caratterizzato dal fatto che detta resina termoplastica fusa à ̈ costituita da un copolimero di vinilacetato. 3. Process according to the preceding claims, characterized in that said fused thermoplastic resin is constituted by a vinyl acetate copolymer. 4. Procedimento, secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detta resina termoplastica fusa viene immessa in detta camera di miscelazione (20) ad una pressione compresa tra 70 e 120 bar. 4. Process according to one or more of the preceding claims, characterized in that said melted thermoplastic resin is introduced into said mixing chamber (20) at a pressure of between 70 and 120 bar. 5. Impianto per la produzione di manufatti con gomma riciclata particolarmente da pneumatici caratterizzato dal fatto di comprendere una vite di estrusione (1) presentante una porzione iniziale (1a) sviluppantesi da una tramoggia (2) di immissione di una resina termoplastica, detta porzione iniziale (1a) essendo separata a tenuta, tramite un tratto di arresto (10), da una camera di miscelazione (20) in cui detta vite di estrusione (1) presenta un tratto di miscelazione (1b), essendo inoltre previsto un condotto di passaggio (11) per l'immissione a pressione di detta resina termoplastica fusa per la bagnatura dei granuli di gomma riciclata immessa tramite imbocchi (21) di immissione di granuli di gomma riciclata in detta camera di miscelazione (20), a valle di detta camera di miscelazione (20), detta vite di estrusione (1) definendo un tratto di raffreddamento (1c) posizionato all'interno di un raffreddatore (30) di convogliamento del prodotto miscelato ad una bocca di estrusione. 5. Plant for the production of articles with recycled rubber particularly from tires characterized in that it comprises an extrusion screw (1) having an initial portion (1a) developing from a hopper (2) for introducing a thermoplastic resin, said initial portion (1a) being hermetically separated, by means of a stop section (10), from a mixing chamber (20) in which said extrusion screw (1) has a mixing section (1b), a passage duct being also provided (11) for the pressure introduction of said melted thermoplastic resin for the wetting of the recycled rubber granules introduced through inlets (21) for the introduction of recycled rubber granules into said mixing chamber (20), downstream of said mixing chamber mixing (20), said extrusion screw (1) defining a cooling section (1c) positioned inside a cooler (30) for conveying the mixed product to an extrusion mouth. 6. Impianto, secondo la rivendicazione precedente, caratterizzato dal fatto di comprendere una calandra (50) a valle di detta bocca di estrusione (40). 6. Plant according to the preceding claim, characterized in that it comprises a calender (50) downstream of said extrusion mouth (40). 7. Impianto, secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto di comprendere un imbocco ausiliario (60) in detta camera di miscelazione per l'immissione di olio di processo, di un eventuale collante o di un ulteriore polimero. 7. Plant according to one or more of the preceding claims, characterized in that it comprises an auxiliary inlet (60) in said mixing chamber for introducing process oil, any glue or a further polymer. 8. Impianto, secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detto condotto di passaggio (11) termina in doccioni (25) disposti circonferenzialmente attorno a detta vite di estrusione (1). 8. Plant, according to one or more of the preceding claims, characterized in that said passage duct (11) ends in gargoyles (25) arranged circumferentially around said extrusion screw (1). 9. Manufatto in gomma riciclata particolarmente da pneumatici, caratterizzato dal fatto di essere ottenuto secondo il procedimento di cui alle rivendicazioni precedenti.9. Manufactured from recycled rubber particularly from tires, characterized in that it is obtained according to the process of the preceding claims.
ITMI2009A001775A 2009-10-15 2009-10-15 PROCEDURE FOR THE MANUFACTURE OF MANUFACTURED ARTICLES WITH A PARTICULARLY RECYCLED RUBBER BY TIRES, AS WELL AS IT IS IMPLEMENTED AND OBTAINED. IT1395941B1 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB955136A (en) * 1962-04-02 1964-04-15 Eastman Kodak Co Extrusion apparatus
US3256562A (en) * 1964-08-10 1966-06-21 Western Electric Co Extruding system
JPS5741932A (en) * 1980-08-27 1982-03-09 Toshiba Mach Co Ltd Manufacture of extruded article and device therefor
US5523328A (en) * 1991-08-01 1996-06-04 Renewed Materials Industries, Inc. Process and apparatus for extruding mixtures of thermoplastic and thermoset materials and products made therefrom
WO2001003907A1 (en) * 1999-07-12 2001-01-18 Helmut Bacher Device and method for incorporating sensitive additives into thermoplastic synthetic material
WO2001008862A1 (en) * 1998-08-19 2001-02-08 Centre De Recherche Industrielle Du Quebec Process for producing batches of rubber-based composition
WO2004056551A1 (en) * 2002-12-20 2004-07-08 Meccaniche Moderne S.P.A. Method for producing composite materials such as thermoplastic resins with mineral and/or vegetable fillers
DE102004007479A1 (en) * 2004-02-13 2005-09-08 Berstorff Gmbh Extruder for processing materials with different melt temperatures has separate processing units for each material before the different plasticized materials are combined in the extruder
WO2007040788A1 (en) * 2005-09-16 2007-04-12 Union Carbide Chemicals & Plastics Technology Corporation A method to increase production rate of a continuous mixer or extruder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB955136A (en) * 1962-04-02 1964-04-15 Eastman Kodak Co Extrusion apparatus
US3256562A (en) * 1964-08-10 1966-06-21 Western Electric Co Extruding system
JPS5741932A (en) * 1980-08-27 1982-03-09 Toshiba Mach Co Ltd Manufacture of extruded article and device therefor
US5523328A (en) * 1991-08-01 1996-06-04 Renewed Materials Industries, Inc. Process and apparatus for extruding mixtures of thermoplastic and thermoset materials and products made therefrom
WO2001008862A1 (en) * 1998-08-19 2001-02-08 Centre De Recherche Industrielle Du Quebec Process for producing batches of rubber-based composition
WO2001003907A1 (en) * 1999-07-12 2001-01-18 Helmut Bacher Device and method for incorporating sensitive additives into thermoplastic synthetic material
WO2004056551A1 (en) * 2002-12-20 2004-07-08 Meccaniche Moderne S.P.A. Method for producing composite materials such as thermoplastic resins with mineral and/or vegetable fillers
DE102004007479A1 (en) * 2004-02-13 2005-09-08 Berstorff Gmbh Extruder for processing materials with different melt temperatures has separate processing units for each material before the different plasticized materials are combined in the extruder
WO2007040788A1 (en) * 2005-09-16 2007-04-12 Union Carbide Chemicals & Plastics Technology Corporation A method to increase production rate of a continuous mixer or extruder

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