CO-R OT AT ING T SE : F L E XIBIL IT Y IN PL AST IC R E CYCL ING
PR E SE NT AT ION SCHE ME I ntruduc tio n E xtrude r de sig n fle xib ility Pro c e ss fle xib ility Adva nc e d Re c yc ling e xa mple s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
INT R ODUCT ION Plastic re c yc ling e xtrusion proc e ss is a g e ne ric de finitio n tha t c o ve r a wide ra ng e o f diffe re nt po ssib ilitie s We can face “simple” re -granulation re q ue st o r c o mple x c ompounding o r ble nding pro c e sse s R E -GR ANUL AT ION: - No t c o nta mina te d sing le pla stic type industria l sc ra p e a sy jo b !!! - Co nta mina te d wa ste stro ng de vo la tiliza tio n & filte ring pe rfo rma nc e re q uire d - Multi-pla stic s wa ste stro ng mixing pe rfo rma nc e re q uire d COMPOUNDING: mixing o f so lid pa rtic le s in the pla stic ma trix NDING : mixing o f two o r mo re diffe re nt pla stic s (o fte n no t c o mpa tib le ) BL E The last 2 situations are typical when it’s necessary to give a “new life” to an use le ss pla stic wa ste to me e t e nd -pro duc t spe c s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
INT R ODUCT ION A re c yc ling c o mpa ny tha t wa nts to c o ve r suc h wide ra ng e o f po ssib ilitie s o ffe re d b y the ma rke t ne e ds to ha ve a fle xible e xtrusion solution is the mo st fle xib le a nd pe rfo rming so lutio n fo r sa tisfy the pla stic Co-rotating T SE re c yc ling pro c e ss re q uire me nts Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
PR E SE NT AT ION SCHE ME I ntro duc tio n E xtrude r de sig n fle xib ility Pro c e ss fle xib ility Adva nc e d Re c yc ling e xa mple s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
F L E XIBIL IT Y: MODUL AR DE SIGN Modular design Different barrels sectors available : - main feeding barrel - close barrel - side feeding barrel - injection barrel - venting barrel Easy re-configuration Easy m aintenance Maximun flexibility Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
F L E XIBIL IT Y: MODUL AR DE SIGN A lo t o f diffe re nt sc re w e le me nts a re a va ila b le to c o mpo se a sc re w c o nfig ura tio n: Conve ying e le me nt Kne ading e le me nt Mixing e le me nt e w c onfiguration de pe nds o n: 1) Polyme r Sc r type 2) F o r fibe r type ille r 3) Additive s 4) F ormulation Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
F L E XIBIL IT Y: MUL T IPL E F E E DING POINT S Po ssib ility to fe e d solid ingre die nts in a dva nc e d po sitio ns (fille rs, fib e rs, a dditive s, po lyme rs) Po ssib ility to fe e d liquid ingre die nts in a dva nc e d po sitio ns (pla stic ize rs, sila ne , peroxide, foaming agents,…) F o r so lid ing re die nts side fe e de rs a re use d F o r liq uid ing re die nt inje c tor s a re use d Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
F L E XIBIL IT Y: MUL T IPL E VE NT ING POINT S e e ding lo w b ulk de nsity so lid ma te ria ls → air in the pro c e ss F Moisture in re c yc le d ma te ria ls Pro c e ss vo la tile side produc ts (re a c tio ns), vo la tile c ontaminats With multiple a tmo sphe ric a nd va c uum ve nting do me s a ll tho se vo la tile c o mpo ne nts c a n b e e xtra c te d fro m the pro c e ss → final produc t quality Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
PR E SE NT AT ION SCHE ME I ntro duc tio n E xtrude r de sig n fle xib ility Pro c e ss fle xib ility Adva nc e d Re c yc ling e xa mple s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
R E CYCL ING E XT R USION PROCE SS Fixed variation of the m aterial Good quality enthalpy H Solid conveying Melting Material feeding Dispersive m ixing Distributive m ixing Venting Metering Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
PR OCE SS E F F ICIE NCY & PR ODUCT QUAL IT Y Solid c onve ying Ve nting Ma ximize inta ke pe rfo rma nc e Co rre c t so lute final c o nc e ntra tio n Me lting Ma ximize me lting e ffic ie nc y Rig ht me lt T fo r ne xt ste p Mate r ial fe e ding Ma ximize inta ke pe rfo rma nc e Me te r ing Dispe r sive mixing Co rre c t a g g lo me ra te / dro ple ts size Ge ne ra te P in a sho rte st a xia l le ng ht Distr ibutive mixing Unifo rm c o mpo sitio n Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2016 Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2017 Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2016
DISPE R SIVE / DIST R IBUT IVE MIXING Not mixe d Distributive mixing Go o d she a r stra in F lo w re -o rie nta tio n We ll mixe d Dispe rsive mixing Go o d she a r stre ss E no ug h lo a d time Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
VAR IABL E S in a R E CYCL ING E XT R USION PR OCE SS A lot of variable parame te rs in a re c yc ling proc e ss!!! Bulk de nsity o f the g rinde d po lyme r Rhe o lo g y o f the po lyme r/ s Co nta mina nts na ture a nd % All o f the m ha ve a stro ng influe nc e o n the pro c e ss pe rfo rma nc e → syste m fle xibility is a ke y po int! Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
PR OCE SS PAR AME T E R S AVAIL ABL E T he fo llo wing proc e ss parame te rs ne e ds to b e a da pte d to the spe c ific re c yc ling re q uire me nts : - she ar / e longational stre sse s o n the pro duc t - pro duc t he a ting thro ug h visc ous dissipation - re side nc e time in the diffe re nt pro c e ss se c tio ns T he c o -ro ta ting T SE o ffe rs the po ssib ility to a djust the va lue s o f the a b o ve parameters “playing” with: - sc re w c o nfig ura tio n - sc re w spe e d - filling ra tio o f the sc re w (e xtrude r c a pa c ity) - b a rre l te mpe ra ture Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
SHE AR / E L ONGAT IONAL ST RE SSE S She a r / e lo ng a tio na l stre sse s a re influe nc ing : - dispe rsive mixing q ua lity - distributive mixing q ua lity - ove r he ating o f the pro duc t T he sc r e w c onfiguration & spe e d c a n a djust the inte nsity o f the the se stre sse s 2700 1/s 800 1/s 200 1/s 150 1/s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
SHE AR / E L ONGAT IONAL ST RE SSE S Po ssib ility to re duc e the stre ss tra nsfe rre d to the ma te ria l using spe c ial mixing e le me nts Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
R E SIDE NCE T IME Re side nc e time in the diffe re nt sc re w e le me nts is influe nc ing : - dispe rsive mixing q ua lity - distributive mixing q ua lity - ove r he ating o f the pro duc t T he e xtrude r c apac ity , sc r e w c onfiguration & spe e d c a n mo dify the re side nc e time distrib utio n c urve min : dispe rsive mixing inde x T σ : distributive mixing inde x σ t min
R E SIDE NCE T IME sc r e w c onfigur ation Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
R E SIDE NCE T IME sc r e w c onfigur ation Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
R E SIDE NCE T IME ope r ational c ondition se t-up • Increasing capacity and screw speed : 1) reduces the average tr 2) makes the distribution narrower Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
ME L T T E MPE R AT UR E HE AT ING COOL ING Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
ME L T T E MPE R AT UR E I nflue nc e d b y the visc ous dissipation inside the pro duc t T he impa c t o f the c onduc tive he at thro ug h the b a rre l is minima l! Ma na g ing the she aring o n the po lyme r → c ontrol on the me lt te mpe rature de ve lopme nt e w c onfiguration , sc r e w spe e d , c apac ity Sc r Rhe o lo g y o f the re c yc le d ma te ria l is the sta rting po int fo r a fine se t-up o f the a b o ve c o nditio ns Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
ME L T T E MPE R AT UR E Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
PR E SE NT AT ION SCHE ME I ntro duc tio n E xtrude r de sig n fle xib ility Pro c e ss fle xib ility Adva nc e d Re c yc ling e xa mple s Re se rve d & Co nfide ntia l - Pro pe rty o f Ic ma Sa n Gio rg io S.p.A. - 2018
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