Isikulufu siyingxenye ebaluleke kakhului-extruder, kungathiwa inhliziyo ye-extruder, ingathinta ngokuqondile ukusetshenziswa kwe-extruder nokusebenza kahle kokukhiqiza.Ukusebenza kwesikulufu kunquma ukukhiqiza, ikhwalithi yokwenza ipulasitiki, ukuhlakazwa kwesicwebi, izinga lokushisa elincibilikayo kanye nokusetshenziswa kwamandla kwe-extruder.
Isikulufa siyingxenye ebaluleke kakhulu ye-extruder, kungathiwa inhliziyo ye-extruder, ingathinta ngokuqondile ukusetshenziswa kwe-extruder nokusebenza kahle kokukhiqiza.Ukusebenza kwesikulufu kunquma ukukhiqiza, ikhwalithi yokwenza ipulasitiki, ukuhlakazwa kwesicwebi, izinga lokushisa elincibilikayo kanye nokusetshenziswa kwamandla kwe-extruder.Ngokuzungezisa isikulufu, iipulasitiki ye-polymer ingakhishwa, futhi ipulasitiki inganyakaza, icindezele futhi ithole ukushisa okuthile ngenxa yokungqubuzana kusilinda.Ngesikhathi sokuhamba kwe-cylinder, ipulasitiki ingaxutshwa futhi yenziwe ngepulasitiki.
- 1.Isakhiwo sesikulufu se-polymer plasticizing kanye nokuxuba i-extruder.
Ngesikhathi sokucubungula, lapho okokusebenza kuya phambili ngesikulufu, kuba nezinguquko kuzinga lokushisa, ingcindezi, i-viscosity, njll., ezihlukile phakathi kwebanga eligcwele lobude besikulufu.Kunezimo ezintathu ezibonakalayo zepulasitiki ye-polymer ku-extruder: isimo sengilazi, isimo sokunwebeka okuphezulu kanye nesimo sokugeleza kwe-viscous.Ukuze uvumelane nezidingo zezifunda ezihlukene futhi ngokuvumelana nezici ezishintshayo zezinto ezibonakalayo, isikulufu singahlukaniswa ngezigaba ezintathu: isigaba sokuphakelayo, isigaba sokucindezela kanye nesigaba se-homogenize.Umsebenzi wesigaba sokuphakela ukondla impahla ehlinzekwe yi-hopper engxenyeni yokucindezela.Ngesikhathi sokuhamba kwepulasitiki, ngokuvamile ihlala iyisimo esiqinile futhi incibilika kancane ngenxa yokushisa.Ubude besigaba sokuphakela buyahlukahluka ngohlobo lwepulasitiki.Isigaba sokucindezela (isigaba sokudlulisa) siyindima yokucindezela kwezinto ezibonakalayo, ukuze impahla isuke esiqinile ibe yincibilikile, iphume kahle emoyeni endabeni;Ukuze uvumelane nezici zokunciphisa ivolumu lapho uphusha igesi entweni emuva esigabeni sokudla, ucindezela into futhi uncibilikisa impahla, isikulufu kulesi sigaba kufanele sikhiqize umphumela omkhulu wokugunda kanye nokucindezelwa kwepulasitiki.Umsebenzi wesigaba se-homogenizing (isigaba semitha) ukuphakela into encibilikisiwe ekhanda lomshini ngevolumu engashintshi (ivolumu) kanye nokucindezela ukuze kwakhiwe emlonyeni womlomo.Umthamo we-spiral groove engxenyeni ye-homogenizing iyafana naleyo esesigabeni sokudla.
Ukuze ugweme ukugcinwa kwezinto ekugcineni kwekhona elifile lekhanda lesikulufu, okubangela ukubola, isikulufu sekhanda ngokuvamile siklanywa sibe ikhoni noma isiyingi;Esinye isigaba se-screw homogenization sithi - indawo engaphezulu ingumzimba obushelelezi ngokuphelele obizwa ngekhanda le-torpedo, kodwa kukhona nemisele eqoshiwe noma amaphethini okugaya.Ikhanda le-torpedo linomsebenzi wokugqugquzela nokulawula izinto, ukuqeda ukwenzeka kwe-pulsating (pulsating) ekugelezeni, ukunciphisa ukushuba kwesendlalelo sezinto ngokwandisa ukucindezela kwezinto, ukuthuthukisa isimo sokushisa, nokuqhubeka nokuthuthukisa ukusebenza kahle kwe-screw plasticizing. .Ngokombono wezokuthutha ezincibilikayo, ukuncibilika kugeleza esigabeni se-screw homogenization ngezindlela ezine, futhi ukugeleza kwezinto ezincibilikisiwe ku-screw groove kuyinhlanganisela yalokhu kugeleza okune: ukugeleza okuhle - ukuncibilika kwepulasitiki kugeleza phakathi kwesilinda nesikulufu siye ngakubo. we-screw groove ngasekhanda lomshini.Isiqondiso sokugeleza kwe-counter-current siphambene nokugeleza okuhle, okubangelwa i-gradient yokucindezela okubangelwa ukumelana kwekhala, i-porous plate kanye ne-filter plate.Ukugeleza kwe-ncibilika ku-perpendicular isiqondiso odongeni lwentambo kuthinta ukuxuba nokushintshaniswa kokushisa kokuncibilika ngesikhathi sokukhipha.Ukugeleza kokuvuza – ukugeleza okubuyela emuva okwakhiwa yi-gradient yokucindezela phakathi kwesikulufa nesilinda, eduze kokuqondisa kwe-axial yesikulufu.Amaphethini okugeleza ahlukene anemiphumela ebalulekile ekuhlanganiseni okufanayo kwama-polymer.
Ububanzi be-screw kanye nokunqunywa kwefomu lesakhiwo, ikakhulukazi ngokuya ngokukhiqizwa komkhiqizo, imininingwane, izinhlobo zezinto ezicutshunguliwe kanye nezici ezahlukahlukene zesakhiwo ezizonqunywa.Ngokuvamile, ingxenye yokuphakelayo yesikulufu inomsele ojulile futhi ukujula kwegroove akushintshile, isigaba sokuminyanisa (isigaba sokuncibilika) sokujula kwesikulufu eduze nendawo yokuphuma kusuka ekujuleni kuya ekujuleni, isigaba semitha (isigaba esine-homogenized) sesikulufu. inomsele ongashoni futhi ukujula kwemisele akushintshile.
- 2.Impahla yesikulufu.
Isikulufu siyingxenye eyinhloko ye-extruder, njengoba impahla yesikulufa kufanele ibe nokumelana nokushisa okuphezulu, ukumelana nokugqoka, ukumelana nokugqwala, amandla aphezulu nezinye izici, ngesikhathi esifanayo kufanele ibe nokusebenza okuhle kokusika, ukucindezeleka okushiye ukwelashwa kokushisa, ukuguqulwa okuncane kokushisa kanye ezinye izici.Okwezinto eziyisikulufa ze-extruder, kunezidingo ezithile ezinjengalezi:
- (1).Izakhiwo eziphakeme zemishini.Ukuze ube namandla anele, ukuzivumelanisa nokushisa okuphezulu, izimo zokusebenza ezicindezelayo, ukuthuthukisa impilo yesevisi yesikulufu.
- (2).Ukusebenza kahle kwemishini.Ukusebenza kahle kwemishini nokusebenza kokwelashwa kokushisa.
- (3).Ukugqwala okuhle nokumelana nokugqoka.
- (4).Kulula ukudweba.
Isikhathi sokuthumela: Jul-15-2019