Poob nphum casting (LFC) yog kev tshaj lij, ze {{{} xoom - residue tshuab. Nws cov ntsiab cai tseem ceeb yog los hloov cov khoom siv cov hlau los yog pwm nrog cov qauv ua npuas ncauj nthuav dav. Thaum lub sij hawm pouring txheej txheem, tus qauv vaporizes thiab ploj, tso cai rau cov hlau molten hlau los nyob ntawm qhov chaw nyob thiab muaj zog. Cov thev naus laus zis no ntawm cov kauj ruam tseem ceeb ntawm cov kauj ruam tseem ceeb, suav nrog kev ua npuas ncauj raug npaj, thiab cov xuab zeb qhuav.
Qhov tsim ntawm cov ua npuas dej ploj pib nrog kev ua cov polystyrene (eps) lossis copolymers (xws li STMMA) ua npuas ncauj. Los ntawm pre {-} Kev kho, kho kom zoo nkauj, cov ua npuas ncauj tau hloov mus ua cov qauv ua npuas ncauj tau hloov pauv cov qauv ntsuas pom kev geometry. Ntau tus qauv yog tom qab ntawd sib koom ua ke los ua ib qho kev sib xyaw ua ke thiab coated nrog kev siv cov khoom siv refractory los txhim kho siab dua. Tom qab txheej txheej dries, cov pwm yog embedded nyob rau hauv qhuav xuab zeb box, uas muaj qhov loj me ntawm cov xuab zeb, kom ntseeg tau tus qauv ruaj ntseg thiab pub dawb.
Cov kua hauv qab yog ib kauj ruam tseem ceeb hauv ploj ua npuas ncauj. Thaum kub molten hlau (xws li hlau, hlau, lossis txhuas alloy) yog hliv rau hauv lub hwj chim, cov qauv ua npuas dej sai sai thiab cov decomposes nyob rau hauv cov cua sov. Cov roj av tsim tawm los ntawm cov txheej txheem siab tsis zoo nyob hauv qab ntawm cov flask, tiv thaiv rov qab siab los ntawm kev tiv thaiv hlau. Ib txhij, cov hlau molten ua kom meej nyob ntawm qhov chaw nyob ntawm tus qauv qub, thaum kawg txias thiab soliding ua kom pom kev ntsuas duab. Kev txiav txim siab txuas ntxiv ntawm qhov tsis zoo ntawm cov tshuaj tsis zoo tsuas yog pab txhawb roj ntxiv tab sis kuj nce pwm cov phom sij, txo qhov kev pheej hmoo ntawm flask sib tsoo.
Qhov zoo ntawm ploj ua npuas ncauj ua npuas ua ke nyob rau hauv nws ze {}}}}} ceg tawv txiv ntoo thaum muab cov khoom siv tshuab ntxiv. Txawm li cas los xij, txheej txheem txheej txheem teeb tsa ntawm cov qauv ua npuas ncauj ntom ntom, thiab cov txheej txheem loj tshaj plaws, thiab cov txheej txheem ua kom zoo dua los tswj cov khoom seem thiab qhov tsis xws luag. Nrog kev thov kom muaj kev ua phooj ywg ib puag ncig thiab kev ua npuas dej, poob ua npuas ncauj casting yog dhau los ua ib qho txheej txheem ntau lawm hauv lub aerospace, thiab engineinginging tshuab thiab engineering, thiab engineitive, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineing, thiab engineetive tshuab
