I-photosensitive resin isho into esetshenziselwa ukukhanya elapha i-prototyping esheshayo.I-resin ephulukisa ukukhanya okuwuketshezi, noma i-resin e-photosensitive ewuketshezi, eyakhiwe ikakhulukazi i-oligomer, i-photoinitiator kanye ne-diluent.I-resin ye-photosensitive esetshenziselwa i-SLA ngokuyisisekelo iyafana ne-prepolymer yokukhanya evamile.Kodwa-ke, njengoba umthombo wokukhanya osetshenziselwa i-SLA uwukukhanya kwe-monochromatic, okuhlukile ekukhanyeni okuvamile kwe-ultraviolet, futhi kunezidingo eziphakeme zokuphulukisa izinga, inhlaka ye-photosensitive esetshenziselwa i-SLA ngokuvamile kufanele ibe nezici ezilandelayo.
(1) I-viscosity ephansi.Ukuphulukisa ukukhanya kusekelwe kumodeli ye-CAD, isendlalelo se-resin ngesendlalelo esibekwe phezulu sibe izingxenye.Lapho ungqimba olulodwa seluqediwe, ngenxa yokuthi ukushuba kwesimo senhlaka kukhulu kunokwenhlaka eqinile, kuba nzima ukuthi inhlaka ewuketshezi ikwazi ukumboza ngokuzenzakalelayo ingaphezulu lenhlaka eqinile ephulukisiwe. usizo lwe-othomathikhi ye-scraper, futhi isendlalelo esilandelayo singacutshungulwa kuphela ngemva kokuba izinga le-liquid lilinganiswe.Lokhu kudinga i-resin ukuthi ibe ne-viscosity ephansi ukuze kuqinisekiswe izinga layo elihle nokusebenza okulula.Manje i-resin viscosity ngokuvamile iyadingeka ukuba ibe ngaphansi kuka-600 CP · s (30 ℃).
(2) Ukuncipha okuncane kokwelapha.Ibanga phakathi kwama-molecule e-resin ewuketshezi yibanga lesenzo se-van der Waals, elingama-0.3 ~ 0.5 nm.Ngemva kokuphulukiswa, ama-molecule ayaphambana futhi akha isakhiwo senethiwekhi.Ibanga eliphakathi kwama-molecule liguqulwa libe ibanga lesibopho esihlangene, esingaba ngu-0.154 nm.Ngokusobala, ibanga phakathi kwama-molecule ngaphambi nangemva kokwelapha liyancipha.Ibanga lokusabela kwe-polymerization yokuhlanganisa okukodwa phakathi kwama-molecule kufanele lehliswe ngo-0.125 ~ 0.325 nm.Nakuba inqubo yokushintsha kwamakhemikhali, i-C = C ishintsha ku-CC futhi ubude bebhondi bukhuphuka kancane, umnikelo ekushintsheni kwebanga lokusebenzisana kwe-intermolecular mncane kakhulu.Ngakho-ke, ukuncipha kwevolumu akunakugwenywa ngemuva kokwelashwa.Ngesikhathi esifanayo, ngaphambi nangemva kokuphulukisa, kusukela ekuphazamisekeni kuya ekuhlelekeni okwengeziwe, kuzoba nokuncipha kwevolumu.I-Shrinkage ayihambisani kakhulu nemodeli yokwakha, ezokhiqiza ukucindezeleka kwangaphakathi, okulula ukubangela ukuguqulwa, i-warpage kanye nokuqhekeka kwezingxenye zemodeli, futhi kuthinte kakhulu ukunemba kwezingxenye.Ngakho-ke, ukuthuthukisa i-shrinkage resin ephansi kuyinkinga enkulu ebhekene ne-SLA resin okwamanje.
(3) Izinga lokuphulukisa ngokushesha.Ngokuvamile, ubukhulu bongqimba ngalunye bungu-0.1 ~ 0.2 mm wokwelapha ungqimba ngongqimba ngesikhathi sokubunjwa, futhi ingxenye eyodwa idinga ukwelashwa ngamakhulu kuya ezinkulungwaneni zezingqimba.Ngakho-ke, uma okuqinile kuzokwenziwa ngesikhathi esifushane, izinga lokuphulukisa libaluleke kakhulu.Isikhathi sokuchayeka se-laser beam ukuya endaweni sikubanga lama-microseconds ukuya kuma-millisecond, acishe alingane nempilo yesimo esijabulisayo se-photoinitiator esetshenzisiwe.Izinga lokuphulukisa eliphansi alithinti kuphela umphumela wokwelapha, kodwa futhi lithinta ngokuqondile ukusebenza kahle komshini wokubumba, ngakho-ke kunzima ukufaneleka ukukhiqizwa kwezentengiselwano.
(4) Ukuvuvukala okuncane.Enqubweni yokwakhiwa kwemodeli, i-resin ewuketshezi iye yambozwa kwezinye izinto zokusebenza eselashiwe, ezingangena ezingxenyeni ezilashiwe futhi zivuvuke inhlaka eselashiwe, okuholela ekwandeni kosayizi wengxenye.Kuphela lapho ukuvuvukala kwe-resin kukuncane lapho ukunemba kwemodeli kungaqinisekiswa.
(5) Ukuzwela ukukhanya okuphezulu.Ngenxa yokuthi i-SLA isebenzisa ukukhanya kwe-monochromatic, idinga ukuthi ubude begagasi be-photosensitive resin ne-laser kumele bufane, okungukuthi, ubude beza beza be-laser kufanele bube eduze nobude obuphezulu bokumuncwa be-resin e-photosensitive ngangokunokwenzeka.Ngasikhathi sinye, ububanzi be-wavelength bokumuncwa kwe-photosensitive resin kufanele bube buncane, ukuze kuqinisekiswe ukuthi ukuphulukiswa kwenzeka kuphela endaweni ekhanyiselwe nge-laser, ukuze kuthuthukiswe ukunemba kokukhiqiza kwezingxenye.
(6) Izinga eliphezulu lokuphulukisa.Ukuncipha kwemodeli yokubumba yokupholisa kungancishiswa, ukuze kuncishiswe ukuwohloka kwe-post curing.
(7) Amandla aphezulu amanzi.Amandla aphezulu okumanzi angaqinisekisa ukuthi akukho ukuguquguquka, ukunwetshwa kanye nokuxebuka kwe-interlayer enqubweni yokuphulukisa okuthunyelwe.
Isikhathi sokuthumela: Jun-01-2022