(1) Tsawg viscosity.UV curing yog raws li CAD qauv, thiab cov resin yog laminated txheej los ntawm txheej los tsim cov khoom.Tom qab thawj txheej tiav lawm, nws yog ib qho nyuaj rau cov kua resin tuaj yeem npog qhov chaw ntawm cov khoom siv kho mob, vim tias qhov nro ntawm cov resin yog ntau dua li ntawm cov khoom resin.Cov qib resin yuav tsum tau muab txhuam thiab coated ib zaug nrog lub tshuab tsis siv neeg scraper, thiab txheej tom ntej tuaj yeem ua tiav tom qab qib theem.Qhov no yuav tsum tau cov resin kom muaj viscosity tsawg los xyuas kom meej nws zoo leveling thiab yooj yim ntawm kev khiav hauj lwm.Tam sim no, cov viscosity ntawm resin feem ntau yuav tsum tau qis dua 600 CP · s (30 ℃).
(2) Lub curing shrinkage yog me me.Qhov kev ncua deb ntawm cov kua resin molecules yog qhov deb ntawm van der Waals quab yuam, txog 0.3 ~ 0.5 nm.Tom qab kho, cov molecules crosslink, thiab qhov kev ncua deb ntawm cov qauv hauv lub network tau hloov mus rau hauv covalent daim ntawv cog lus deb, txog 0.154 nm.Pom tseeb, qhov kev ncua deb ntawm molecules txo qis ua ntej thiab tom qab kho.Qhov kev ncua deb ntawm qhov sib ntxiv ntawm cov tshuaj tiv thaiv polymerization yuav raug txo los ntawm 0.125 ~ 0.325 nm.Nyob rau hauv cov txheej txheem ntawm kev hloov tshuaj, C = C dhau los ua CC, daim ntawv cog lus ntev nce me ntsis, tab sis qhov kev pab cuam rau kev hloov pauv ntawm kev sib cuam tshuam ntawm kev sib cuam tshuam yog tsawg heev.Yog li ntawd, lub ntim shrinkage tom qab kho yog inevitable.Nyob rau tib lub sijhawm, ua ntej thiab tom qab kho, kev tsis sib haum xeeb yuav ua kom zoo dua qub, thiab ntim ntim kuj tshwm sim.Qhov no yog qhov tsis zoo rau cov qauv shrinkage molding, uas yuav tsim kev ntxhov siab sab hauv thiab yooj yim ua rau deformation, warpage thiab tawg ntawm cov qauv qhov chaw., thiab cuam tshuam rau qhov tseeb ntawm qhov chaw.Yog li ntawd, txoj kev loj hlob ntawm tsawg shrinkage resin yog qhov teeb meem tseem ceeb ntawm SLA resin tam sim no.
(3) Lub curing ceev yog ceev.Feem ntau, lub thickness ntawm txhua txheej yog 0.1 ~ 0.2 hli, uas tuaj yeem ua kom muaj zog txheej txheej thaum lub sij hawm molding.Nws yuav siv ntau pua mus rau ntau txhiab txheej los ua kom tiav ib feem.Yog li ntawd, yog tias cov khoom yuav tsum tau tsim nyob rau hauv ib lub sij hawm luv luv, tus nqi kho yog qhov tseem ceeb heev.Lub sij hawm raug ntawm lub laser beam mus rau ib qho taw tes tsuas yog nyob rau hauv thaj tsam ntawm microseconds mus rau milliseconds, uas yog yuav luag sib npaug rau lub neej ntawm lub xeev zoo siab ntawm photoinitiator siv.Tus nqi qis qis tsis tsuas yog cuam tshuam rau cov nyhuv curing, tab sis kuj ncaj qha cuam tshuam rau kev ua haujlwm ntawm lub tshuab molding, yog li nws nyuaj rau siv rau kev lag luam ntau lawm.
(4) Tsawg expansion.Nyob rau hauv tus txheej txheem ntawm kev tsim pwm, cov kua resin ib txwm npog qhov kho qhov chaw ntawm lub workpiece thiab tuaj yeem nkag mus rau hauv qhov kho, ua kom kho cov resin nthuav dav, ua rau qhov loj ntawm qhov loj tuaj.Qhov tseeb ntawm cov qauv tuaj yeem lav tau yog tias qhov o ntawm cov resin me me.
(5) Siab rhiab heev.Vim tias SLA siv lub teeb monochromatic, lub wavelength ntawm photosensitive resin thiab laser yuav tsum sib phim, uas yog, lub wavelength ntawm laser yuav tsum nyob ze li sai tau rau qhov siab tshaj plaws nqus wavelength ntawm photosensitive resin.Nyob rau tib lub sij hawm, qhov nqus wavelength ntau ntawm photosensitive resin yuav tsum nqaim, uas tuaj yeem xyuas kom meej tias kev kho tsuas yog tshwm sim ntawm qhov taw tes ntawm laser irradiation, yog li txhim kho qhov raug ntawm qhov chaw.
(6) High degree ntawm curing.Nws tuaj yeem txo qhov shrinkage ntawm cov qauv tom qab-kho molding, yog li txo qhov kev kho tom qab kho deformation.
(7) Lub zog ntub dej siab.Lub zog ntub dej siab tuaj yeem ua kom ntseeg tau tias cov txheej txheem tom qab kho yuav tsis tsim deformation, nthuav dav thiab interlayer tev.
Post lub sij hawm: Mar-28-2023