Hauv kev tsim cov khoom siv ntxiv, 3D resin molding thev naus laus zis nyob rau hauv photosensitive polymerization, hloov cov kua resin mus rau hauv peb - qhov chaw nyob nrog txoj kev geometry thiab zoo nto nta ntawm txheej - los ntawm - txheej curing. Cov txheej txheem no yuav tsum tsis yog tsuas yog nkag siab tob txog cov tshuaj tiv thaiv photochemical nkaus xwb tab sis kuj tseem muaj kev sib koom tes hauv kev tswj cov khoom siv, cov txheej txheem tsis ua haujlwm, thiab tom qab- ua kom ntseeg tau tias kev ua tiav ruaj khov ntawm molding raug, cov khoom siv kho tshuab, thiab qhov chaw zoo.
Cov hauv paus ntsiab lus ntawm photopolymerization nteg lub hauv paus rau cov txheej txheem no . 3D resins muaj photolytic photoinitiators thiab polymerizable olefin monomers los yog oligomers. Raws li qhov tshwj xeeb wavelengths ntawm ultraviolet los yog pom lub teeb irradiation, tus pib decomposes los tsim cov dawb radicals los yog cations, ua rau qhib ob daim ntawv cog lus thiab tsim ib tug ntoo khaub lig- txuas network, ua rau cov resin hloov los ntawm cov kua rau ib tug khoom lub xeev. Cov txheej txheem no yog tus cwj pwm los ntawm txheej txheej - los ntawm - txheej tsub zuj zuj, nrog rau cov tuab ntawm txhua txheej txiav txim siab los ntawm lub teeb pom kev zoo thiab cov tswv yim scanning, yog li tsim kom tiav cov txheej txheem los ntawm txheej. Nyob ntawm seb lub teeb ci thiab qhov projection txoj kev, cov txheej txheem tseem ceeb tau muab faib ua stereolithography (SLA), digital light processing (DLP), thiab kua siv lead ua zaub (LCD) photopolymerization.
SLA (Nto Mount Laser) thev naus laus zis siv lub teeb UV laser los luam theej cov resin nto los yog kho txheej ntawm kev kub ceev ntawm lub galvanometer system, curing point - los ntawm - taw tes los ua tus ntoo khaub lig -sectional profile. Nws qhov zoo yog nyob rau hauv qhov me me laser qhov chaw loj thiab meej qhov chaw, ua tiav qhov siab qhov tseeb thiab nthuav dav kev tsim tawm, ua rau nws tsim nyog rau txoj kev nkhaus nkhaus, microstructures, thiab pwm thiab precision qhov chaw nrog nruj nreem qhov yuav tsum tau ua. Tus yuam sij rau cov txheej txheem no yog nyob rau hauv kev sib piv lub zog laser, scanning ceev, thiab sib tshooj sib tshooj, nrog rau kev sib koom ua ke ntawm cov kua theem tswj thiab txheej txheej thickness nqis los txo cov kev ntxhov siab interlayer thiab warpage.
DLP (Digital Micromirror Process) thev naus laus zis siv cov khoom siv micromirror digital (DMD) los tsim cov duab UV tag nrho rau hauv lub tank resin, kho tag nrho cov ntoo khaub lig-section hauv ib zaug. Vim muaj kev sib xyaw ua ke ntawm tag nrho cov txheej, nws txoj kev sib sau ceev yog siab dua SLA, thiab nws muaj kev sib raug zoo dua interlayer, ua rau nws tsim nyog rau me me mus rau nruab nrab batch ntau lawm thiab cov qauv tsim uas yuav tsum tau muaj qhov sib xws. Tus yuam sij rau tus txheej txheem no yog nyob rau hauv optimizing projection daws teeb meem thiab lub teeb qhov chaw uniformity, nrog rau precisely tswj lub sij hawm raug thiab lub teeb siv lub teeb kom tsis txhob ntug burrs thiab dimensional deviations tshwm sim los ntawm over- kho los yog nyob rau hauv - kho.
LCD thev naus laus zis siv lub siab - daws teeb meem LCD npo ua lub npog ntsej muag, ua ke nrog ultraviolet backlighting kom ua tiav txheej - los ntawm - txheej raug. Cov cuab yeej siv yog tus nqi qis thiab nws yooj yim rau kev nrov. Nws qhov kev daws teeb meem yog txwv los ntawm qhov loj ntawm LCD pixels, tab sis nrog qhov tsim nyog tsis, nws tseem tuaj yeem ua tau raws li qhov kev xav tau ntawm feem ntau cov qauv qauv thiab nruab nrab - qhov tseeb. Cov txheej txheem yuav tsum tau saib xyuas tshwj xeeb rau lub vijtsam tiv thaiv kev laus ntawm ultraviolet, qhov sib txuam ntawm lub teeb qhov chaw wavelength, thiab flatness ntawm cov yeeb yaj kiab tso tawm kom txo qis kev cuam tshuam thiab tsis zoo interlayer peeling.
Hauv cov txheej txheem dav dav, tus qauv yog thawj zaug hlais thiab kev txhawb nqa yog tsim, hloov cov ntaub ntawv 3D rau hauv txheej - los ntawm - txheej txheej qhia tawm. Cov khoom siv ces cia li ua tiav cov voj voog ntawm cov txheej txheej, theem, raug kho, nqa platform, thiab npaj rau txheej tom ntej kom txog thaum tag nrho cov khoom tsim. Txheej thickness xaiv yuav tsum ua tib zoo xav txog qhov tseeb thiab kev ua haujlwm: 0.025-0.1 hli txheej thickness feem ntau yog siv rau precision qhov chaw, thaum 0.1-0.2 hli tuaj yeem nce rau cov qauv zoo tib yam kom ceev cov txheej txheem. Lub zog raug cuam tshuam ncaj qha rau qhov tob tob; Lub zog tsis txaus yuav ua rau cov txheej txheem kho tsis tiav, thaum lub zog ntau dhau yuav ua rau muaj kev pheej hmoo ntawm shrinkage, warping, thiab post{10}} kho embrittlement.
Post{0}}kev ua tiav yog qhov tseem ceeb rau qhov kawg qhov zoo. Thawj qhov molded yuav tsum tau muab ntxuav nrog cov kuab tshuaj (xws li isopropanol) kom tshem tawm cov resin tsis kho. Cov txheej txheem no yuav tsum tau ua tib zoo tswj lub sijhawm thiab kev ua haujlwm txhua yam kom tsis txhob ua rau qhov chaw kho. Cov txheej txheem kho thib ob yog tom qab ntawd ua rau hauv UV chamber nrog kev sib tw wavelength thiab ntau npaum li cas los txhim kho tus ntoo khaub lig-txuas thiab cov khoom siv kho tshuab, tab sis yuav tsum zam dhau los tiv thaiv kom tsis txhob daj lossis ua kom nrawm nrawm. Kev tshem tawm ntawm cov qauv kev txhawb nqa yuav tsum tau ua ke txiav, sib tsoo, thiab polishing txheej txheem kom ua tiav qhov kev xav tau saum npoo tiav thiab qhov tseeb qhov tseeb.
Environmental thiab txheej txheem tswj kuj tseem ceeb heev. Resin rhiab heev rau qhov kub, av noo, thiab lub teeb. Qhov chaw molding yuav tsum tau khaws cia ntawm qhov kub thiab txias (20 ° ~ 28 ° C), nrog rau qhov tsim nyog dehumidification thiab tiv thaiv lub teeb kom tiv thaiv ua ntej - kho thiab kev ua haujlwm hloov pauv. Hais txog kev saib xyuas cov khoom siv, lub tank resin yuav tsum tau muab ntxuav tsis tu ncua, lub teeb ci siv tau thiab kev ua haujlwm zoo sib xws, thiab qib platform ntsuas kom ntseeg tau ntev -lub sij hawm ruaj khov ntawm txheej tuab thiab qhov chaw raug.
Zuag qhia tag nrho, 3D resin molding yog ib qhov system engineering project integrating photochemistry, precision mechanics, thiab software algorithms. Cov txheej txheem sib txawv muaj lawv tus kheej qhov zoo ntawm qhov raug, ceev, thiab cov xwm txheej siv tau; xaiv kom raug thiab parameter optimization tuaj yeem ua kom cov khoom muaj peev xwm ua tau. Nrog rau kev nce qib hauv lub teeb ci thev naus laus zis, resin formulation, thiab kev tswj xyuas ntse, cov txheej txheem no yuav txuas ntxiv mus rau qhov siab dua, kev ua haujlwm sai dua, thiab kev ua haujlwm zoo dua qub, muab cov khoom molding txhawb rau cov teb xws li precision manufacturing, kab lis kev cai thiab kev lag luam muaj tswv yim, thiab cov qauv kho mob.
