ITLU20090009A1 - PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED. - Google Patents

PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED. Download PDF

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Publication number
ITLU20090009A1
ITLU20090009A1 IT000009A ITLU20090009A ITLU20090009A1 IT LU20090009 A1 ITLU20090009 A1 IT LU20090009A1 IT 000009 A IT000009 A IT 000009A IT LU20090009 A ITLU20090009 A IT LU20090009A IT LU20090009 A1 ITLU20090009 A1 IT LU20090009A1
Authority
IT
Italy
Prior art keywords
photoluminescent
production process
pigments
rotational
products
Prior art date
Application number
IT000009A
Other languages
Italian (it)
Inventor
Luca Gemignani
Original Assignee
Fluo Snc
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 Fluo Snc filed Critical Fluo Snc
Priority to IT000009A priority Critical patent/ITLU20090009A1/en
Publication of ITLU20090009A1 publication Critical patent/ITLU20090009A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/06Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould about two or more axes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2995/00Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Forging (AREA)

Description

"Processo di produzione di manufati fotoluminesceni tramite sistema rotazionale e manufatto così otenuto" "Production process of photoluminescent products by means of a rotational system and the resulting product"

DESCRIZIONE DESCRIPTION

1. I manufati di grosse dimensioni (vasi . , sedie, etc.) ottenuti da granulati o polveri termoplastiche vengono prodoti tramite sistemi rotazionali che oggi costituiscono il sistema più efficiente ed economico per la loro produzione. 1. The products of large dimensions (vases, chairs, etc.) obtained from granulates or thermoplastic powders are produced by means of rotational systems which today constitute the most efficient and economical system for their production.

2. La macchina forma ['oggeto tramite una rotazione sui tre assi che fa aderire sulle pareti di uno stampo predisposto, fato ruotare dalla macchina, la mescola di granulati o polveri termoplastiche sottoposta a previo riscaldamento. 2. The machine forms the object by means of a rotation on the three axes which causes the mixture of granules or thermoplastic powders subjected to previous heating to adhere to the walls of a pre-arranged mold, made to rotate by the machine.

3. All' aumentare della quantità di polveri o granulati corrisponde un maggiore spessore delle pareti del manufatto finito. 3. As the quantity of powders or granules increases, the walls of the finished product increase in thickness.

4. Uno dei limiti di questo processo produttivo è la difficoltà di ottenere manufati policromatici ed effeti estetici quali venature di diverso colore od aree di diverso colore nel prodotto finito, infati il processo di produzione rotativo tende a far mescolare le polveri e i granuli di diverso colore ottenendo una miscela di un unico colore risultante dai colori dei granuli o polveri immesse. 4. One of the limitations of this production process is the difficulty of obtaining polychromatic products and aesthetic effects such as veins of different colors or areas of different colors in the finished product, in fact the rotary production process tends to mix the powders and granules of different colors obtaining a mixture of a single color resulting from the colors of the granules or powders introduced.

5. Nel caso di polveri o granuli di diverso colore immessi nell' impasto, oltre all'effetto del mescolamento si avrà anche un effetto di cattiva omogeneizzazione dovuta alla segregazione delle particelle o granuli sopradescritta,5. In the case of powders or granules of different colors introduced into the mixture, in addition to the mixing effect, there will also be a bad homogenization effect due to the segregation of the particles or granules described above,

6. Quello che risulta un limite nella produzione di manufatti policromatici e decorati sopra descritto diventa secondo l’invenzione realizzata, un vantaggio per la produzione di manufatti fotolumiscenti. infatti in base alla invenzione proposta si sostituiscono le polveri o i granulati colorati con polveri o granuli di pigmento fotoluminescente al fine di sfruttare il fenomeno della fotoluminescenza per ottenere manufatti, decorati e nuovi sul mercato. 6. What is a limit in the production of polychromatic and decorated artifacts described above becomes according to the invention achieved, an advantage for the production of photolumescent artifacts. in fact, on the basis of the proposed invention, the powders or colored granules are replaced with powders or granules of photoluminescent pigment in order to exploit the phenomenon of photoluminescence to obtain manufactured articles, decorated and new on the market.

7. La fotoluminescenza è la proprietà che hanno alcune sostanze chimiche di emettere luce se esposte ad una sorgente esterna eccitatrice, per es. la luce solare o artificiale. La fotoluminescenza può essere di 2 tipi: "fosforescenza’ e ‘fluorescenza’ . Nel primo caso il fenomeno persiste per un certo periodo anche dopo l'eccitazione. Nella prima fase gli elettroni presenti nel livello orbitale fondamentale passano ad un livello superiore. Nella fase successiva gli elettroni ritornano allo stato iniziale perdendo l energia acquisita sotto forma di luminescenza. In breve, la fosforescenza è quella proprietà che consente ad un oggetto di assorbire la luce dall'ambiente comportandosi come un "accumulatore di luce” naturale. In condizioni di buio o penombra. oggetto rilascia lentamente la luce accumulata auto-illuminandosi per molte ore. L'effetto è paragonabile a quello di un neon e può assumere diverse colorazioni. 7. Photoluminescence is the property that some chemical substances have to emit light when exposed to an external excitatory source, eg. sunlight or artificial light. Photoluminescence can be of 2 types: "phosphorescence 'and' fluorescence '. In the first case the phenomenon persists for a certain period even after excitation. In the first phase the electrons present in the fundamental orbital level pass to a higher level. In the phase subsequently the electrons return to their initial state, losing the energy acquired in the form of luminescence.In short, phosphorescence is the property that allows an object to absorb light from the environment, acting as a natural "light accumulator". In dark or twilight conditions. object slowly releases the accumulated light self-illuminating for many hours. The effect is comparable to that of a neon and can take on different colors.

8. I pigmenti fotoluminescenti sono sostanze che hanno diversa granulometria, da cui dipende anche la resa dell'effetto di luminescenza. Infatti i pigmenti foto luminescenti utilizzati in questo processo sono stati selezionati in modo da ottenere una curva granulometrica precìsa al fine di avere almeno il 90% dei granuli di dimensione compresa fra 10 micron e 50 micron. Granuli inferiori a 10 micron emettono poca luminescenza, granuli superiori a 50 micron emettono una buona luminescenza e anche duratura ma tendono a sgranare e a provocare un degrado del F effetto decorativo finale. 8. Photoluminescent pigments are substances that have different granulometry, on which the yield of the luminescence effect also depends. In fact, the photo luminescent pigments used in this process have been selected in order to obtain a precise granulometric curve in order to have at least 90% of the granules with a size between 10 microns and 50 microns. Granules lower than 10 microns emit little luminescence, granules higher than 50 microns emit a good luminescence and also lasting but tend to crumble and cause a degradation of the final decorative effect.

9. Un elemento da tenere in considerazione del processo rotazionale di produzione, è il fatto che ii sistema di rotazione delle macchine normalmente utilizzate presenta dei '‘giochi" di natura meccanica che provocano vibrazioni, a volte anche brusche e '“'salti" durante la rotazione che non risulta quindi uniforme, in aggiunta le piattaforme di fissaggio degli stampi, se non correttamente bilanciate generano improvvisi cambi di velocità. 9. An element to be taken into consideration in the rotational production process is the fact that the rotation system of the machines normally used presents mechanical "games" that cause vibrations, sometimes even abrupt and "'jumps" during the rotation which is therefore not uniform, in addition the mold fixing platforms, if not correctly balanced, generate sudden speed changes.

Le vibrazioni e le accelerazioni e le decelerazioni provocano il classico effetto di segregazione di granuli e polveri di diverse dimensioni (granulometrie) e densità. 1 pigmenti fotoluminescenti presentano differenti granulometrie e un peso specifico molto più elevato delle polveri colorate c per questo risentono del fenomeno della segregazione in modo più accentuato. Vibrations and accelerations and decelerations cause the classic segregation effect of granules and powders of different sizes (granulometries) and densities. The photoluminescent pigments have different particle sizes and a much higher specific weight than colored powders and are therefore affected by the phenomenon of segregation in a more accentuated way.

I O. Al fine di ottenere un prodotto finito perfetto ed omogeneo in ogni sua parte nei diversi colori dei pigmenti fotoluminescenti inseriti occorre avere un perfetto e costante controllo della macchina rotazionale per evitare quanto descritto in 9. I O. In order to obtain a perfect and homogeneous finished product in all its parts in the different colors of the photoluminescent pigments inserted, it is necessary to have a perfect and constant control of the rotational machine to avoid what is described in 9.

Questo in base alla invenzione è stato ottenuto eliminando tutti i giochi di natura meccanica e bilanciando le piattaforme di fissaggio degli stampi. I L Fra i vari e diversi pigmenti di fotoluminesceni uno dei preferiti per questa applicazione è Alluminato di Stronzio dopato con Europio e Disprosi o che viene mescolato in misura del 2,5% con polere dì polietilene naturale (20 Kg) e polvere di polietilene colorato (1.5 Kg) per produzione di manufatti colorati, o polvere di polietilene bianco (4 Kg) per produzione di manufatti bianchi. Si possono mescolare anche più pigmenti fluorescenti diversi ed in quantità diverse. This according to the invention was obtained by eliminating all mechanical play and balancing the fixing platforms of the molds. I L Among the various and different photoluminescene pigments, one of the favorites for this application is Strontium Aluminate doped with Europium and Dysprosi or which is mixed in a measure of 2.5% with natural polyethylene powders (20 Kg) and colored polyethylene powder ( 1.5 Kg) for the production of colored products, or white polyethylene powder (4 Kg) for the production of white products. It is also possible to mix several different fluorescent pigments and in different quantities.

12. Vantaggio della invenzione, oltre che ottenere manufatti bianchi o colorali e decorati dall<,>effeto della fotoluminescenza è quello di poter inserire una miscela calibrata di pigmenti fotoluminescenti insieme alle polveri o ai granuli di materiale termoplastico. Durante il processo di produzione realizzato secondo 10, la miscela si omogeneizza perfettamente rendendo l'effetto fotoluminescente duraturo e omogeneo. Le componenti si aggiungono quindi in una sola fase del processo produttivo portando anche semplicità di produzione e risparmi di tempo e costi. 12. The advantage of the invention, in addition to obtaining white or colored and decorated articles with the effect of photoluminescence, is that of being able to insert a calibrated mixture of photoluminescent pigments together with the powders or granules of thermoplastic material. During the production process carried out according to 10, the mixture is perfectly homogenized making the photoluminescent effect lasting and homogeneous. The components are therefore added in a single phase of the production process, also bringing simplicity of production and savings in time and costs.

Claims (7)

RIVENDICAZIONI “Processo di produzione di manufatti fotoluminescenti tramite sistema rotazionale e manufatto cosi otenuto ’ L Processo di produzione rotazionale per manufatti di materiale termoplastico con l'aggiunta di pigmenti fotoluminescenti per l'ottenimento di manufatti fluorescenti c o fosforescenti 2. CLAIMS "Production process of photoluminescent artifacts using a rotational system and artifact thus obtained ' L Rotational production process for thermoplastic material products with the addition of photoluminescent pigments to obtain fluorescent and phosphorescent products 2. Processo di produzione rotazionale in cui vengono aggiunte insieme alle polveri o granuli di materiale termoplastico miscele calibrate di pigmenti foto luminescenti con granulometrie comprese per una percentuale superiore al 90% fra 10 micron e 50 micron, 3. Rotational production process in which calibrated mixtures of photo luminescent pigments with particle sizes included for a percentage greater than 90% between 10 microns and 50 microns are added together with the powders or granules of thermoplastic material, 3. Processo di produzione rotazionale per manufatti di materiale termo plastico in cui il processo rotazionale sia reso uniforme e continuo evitando scosse, vibrazioni e variazioni di velocità. Rotational production process for thermoplastic material products in which the rotational process is made uniform and continuous, avoiding shocks, vibrations and speed variations. Processo di produzione per manufatti di materiale termoplastico in cui la miscela di pigmenti fotoluminescenti aggiunta si distribuisce in modo uniforme nel manufatto. Production process for products of thermoplastic material in which the mixture of photoluminescent pigments added is distributed uniformly in the product. Processo di produzione rotazionale per manufatti di materiale termoplastico con raggiunta di pigmenti fotoluminescenti e la contemporanea aggiunta di pigmenti colorati per Γ ottenimento di manufatti fotoluminescenti colorati. Rotational production process for artifacts of thermoplastic material with the addition of photoluminescent pigments and the simultaneous addition of colored pigments to obtain colored photoluminescent artifacts. 6. Precesso di produzione per manufatti di materiale termoplastico in cui la miscela di pigmenti fotoluminescenti aggiunta e di pigmenti colorati aggiunti si distribuisce in modo uniforme nel manufatto. 6. Production process for thermoplastic material products in which the mixture of added photoluminescent pigments and added colored pigments is distributed uniformly in the product. 7. Manufatti ottenuti con il processo descritto, sia non colorati e fotoluminescenti sia colorati e fotol uminesce nti.7. Products obtained with the process described, both unstained and photoluminescent and colored and photoluminescent.
IT000009A 2009-08-21 2009-08-21 PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED. ITLU20090009A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT000009A ITLU20090009A1 (en) 2009-08-21 2009-08-21 PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED.

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Application Number Priority Date Filing Date Title
IT000009A ITLU20090009A1 (en) 2009-08-21 2009-08-21 PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED.

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ITLU20090009A1 true ITLU20090009A1 (en) 2011-02-22

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IT000009A ITLU20090009A1 (en) 2009-08-21 2009-08-21 PROCESS OF PRODUCTION OF PHOTOLUMINESCENT MANUFACTURED ARTICLES THROUGH A ROTATIONAL SYSTEM AND MANUFACTURED SO IT IS OBTAINED.

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360973A (en) * 2000-04-04 2001-10-10 Rotational Mouldings Ltd Visually enhanced articles
WO2007048200A1 (en) * 2005-10-28 2007-05-03 Visionglow Ip Pty Ltd Long after-glow photoluminescent material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360973A (en) * 2000-04-04 2001-10-10 Rotational Mouldings Ltd Visually enhanced articles
WO2007048200A1 (en) * 2005-10-28 2007-05-03 Visionglow Ip Pty Ltd Long after-glow photoluminescent material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Jumping curves", NEWSLETTER OF ICO POLYMERS, 1 November 2006 (2006-11-01), XP002589179, Retrieved from the Internet <URL:http://www.cotene.com/cms_resources/Newsletter%20Sep%2006.pdf> [retrieved on 20100628] *

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