I-photosensitive resin ibhekisa kwizinto ezisetyenziselwa ukukhanya okunyanga iprototyping ekhawulezayo.Lulwelo olulula lokunyanga iresin, okanye intlaka ebonisa ulwelo, eyenziwe ikakhulu yioligomer, photoinitiator kunye nediluent.I-resin ye-photosensitive esetyenziselwa i-SLA ngokusisiseko iyafana ne-prepolymer yokukhanya eqhelekileyo.Nangona kunjalo, ekubeni umthombo wokukhanya osetyenziselwa i-SLA kukukhanya kwe-monochromatic, okwahlukileyo kukukhanya okuqhelekileyo kwe-ultraviolet, kwaye ineemfuno eziphezulu zokunyanga izinga lokunyanga, i-photosensitive resin esetyenziselwa i-SLA ngokubanzi kufuneka ibe nezi mpawu zilandelayo.
(1) I-viscosity ephantsi.Ukunyanga ukukhanya kusekelwe kwimodeli ye-CAD, umaleko we-resin ngumaleko obekwe ngaphezulu kwiindawo.Xa umaleko omnye ugqityiwe, ngenxa yokuba ukuxinezeleka komphezulu wentlaka kukhulu kunoko kweresin eqinileyo, kunzima kwintlaka yolwelo ukugubungela ngokuzenzekelayo umphezulu weresin ephilileyo ephilileyo. uncedo lwe-automatic scraper, kwaye umaleko olandelayo unokucutshungulwa kuphela emva kokuba inqanaba le-liquid libekwe.Oku kufuna ukuba i-resin ibe ne-viscosity ephantsi ukuqinisekisa umgangatho wayo omhle kunye nokusebenza okulula.Ngoku i-resin viscosity ifunwa ngokubanzi ukuba ibe ngaphantsi kwe-600 CP · s (30 ℃).
(2) Ukuncipha okuncinci kokunyanga.Umgama phakathi kweemolekyuli zeresin elulwelo yi-van der Waals force action distance, emalunga ne-0.3 ~ 0.5 nm.Emva kokunyanga, iimolekyuli zidibene kwaye zenze isakhiwo sothungelwano.Umgama phakathi kweemolekyuli uguqulwa ube ngumgama we-covalent bond, omalunga ne-0.154 nm.Ngokucacileyo, umgama phakathi kweemolekyuli ngaphambi nasemva kokunyanga uyancipha.Umgama wokongezwa kwepolymerization reaction phakathi kweeathom kufuneka uncitshiswe nge-0.125 ~ 0.325 nm.Nangona kwinkqubo yokutshintshwa kweekhemikhali, i-C = C iyatshintsha kwi-CC kunye nobude bebhondi banda kancinci, igalelo ekutshintsheni umgama wokusebenzisana kwe-intermolecular lincinci kakhulu.Ke ngoko, ukuncitshiswa komthamo akunakuphepheka emva kokunyanga.Ngexesha elifanayo, ngaphambi nangemva kokunyanga, ukusuka kwi-disorder ukuya kumyalelo ongaphezulu, kuya kubakho nokuncipha kwevolumu.I-Shrinkage ayithandeki kakhulu kwimodeli yokubumba, eya kuvelisa uxinzelelo lwangaphakathi, olulula ukubangela i-deformation, i-warpage kunye nokuqhekeka kweengxenye zemodeli, kwaye ichaphazela ngokukrakra ukuchaneka kwamacandelo.Ke ngoko, ukuphuhlisa i-resin ephantsi ye-shrinkage yeyona ngxaki iphambili ejongene ne-SLA resin okwangoku.
(3) Isantya sokunyanga ngokukhawuleza.Ngokubanzi, ubukhulu bomaleko ngamnye yi-0.1 ~ 0.2 mm yokunyanga umaleko ngongqimba ngexesha lokubumba, kwaye inxalenye enye ifuna ukunyangwa ngamakhulu ukuya kumawaka amaleko.Ngoko ke, ukuba isiqina siza kuveliswa ngexesha elifutshane, izinga lokunyanga libaluleke kakhulu.Ixesha lokuvezwa kwe-laser beam ukuya kwindawo kuphela kuluhlu lwe-microseconds ukuya kwi-milliseconds, ephantse ilingane nobomi obuchulumancisayo be-photoinitiator esetyenzisiweyo.Izinga lokunyanga eliphantsi alichaphazeli kuphela umphumo wokunyanga, kodwa lichaphazela ngokuthe ngqo ukusebenza kakuhle komatshini wokubumba, ngoko kunzima ukufaneleka kwimveliso yorhwebo.
(4) Ukudumba okuncinci.Kwinkqubo yokwenza imodeli, i-resin yolwelo iye yagqunywa kwezinye iindawo zokusebenza eziphilisiweyo, ezinokungena kwiindawo eziphilisiweyo kwaye zidumbe i-resin ephilileyo, okukhokelela ekwandeni kobukhulu benxalenye.Kuphela xa ukuvuvukala kwe-resin kuncinci kunokuqinisekiswa ukuchaneka kwemodeli.
(5) Uvakalelo oluphezulu lokukhanya.Ngenxa yokuba i-SLA isebenzisa ukukhanya kwe-monochromatic, ifuna ukuba ubude be-photosensitive resin kunye ne-laser kufuneka buhambelane, oko kukuthi, ubude be-laser kufuneka bube kufutshane nobude be-absorption bobude be-photosensitive resin kangangoko kunokwenzeka.Kwangaxeshanye, uluhlu lwamaza okufunxa lwe-photosensitive resin kufuneka lube mxinwa, ukuze kuqinisekiswe ukuba ukunyangwa kwenzeka kuphela kwindawo efakwe i-laser, ukuze kuphuculwe ukuchaneka kokwenziwa kwamalungu.
(6) Iqondo eliphezulu lokunyanga.I-shrinkage ye-post yokunyanga imodeli yokubumba ingancitshiswa, ukuze kuncitshiswe i-deformation yokunyanga isithuba.
(7) Amandla aphezulu amanzi.Amandla aphezulu amanzi anokuqinisekisa ukuba akukho deformation, ukwandiswa kunye ne-interlayer peeling kwinkqubo yokunyanga isithuba.
Ixesha lokuposa: Jun-01-2022