Ntau hom xuab zeb txoj kev thiab cov khoom siv feem ntau yog siv thiab tau teev tseg hauv qab no:
1. Cov xuab zeb qhuav
Cov xuab zeb qhuav yog ib hom molding xuab zeb uas siv cov av nplaum (xws li kaolinite lossis bentonite) nrog dej me me los ua tus neeg sawv cev. Cov ntawv khi no tsim cov pwm uas khaws nws cov qauv-rammed zoo thiab tiv taus cov molten hlau tsis muaj kev sib tsoo lossis ua rau muaj qhov tsis xws luag hauv qhov casting. Ib qho txiaj ntsig tseem ceeb ntawm txoj hauv kev no yog tias muaj cov pa tsawg dua hauv cov txheej txheem sau uas tuaj yeem ua rau tawg thiab ua kom tsis muaj zog ntawm cov xuab zeb tsim, lossis cuam tshuam cov ncuav.
2. Resin xuab zeb
Resin xuab zeb, kuj hu ua resin-coated xuab zeb los yogfuranxuab zeb, yog hom molding xuab zeb siv hauv cov txheej txheem xuab zeb casting. Furan hais txog kev siv furfuryl cawv resin. Nws yog kev sib xyaw ntawm silica xuab zeb lossis lwm cov ntaub ntawv sib sau ua ke thiab cov khoom siv hluavtaws uas khi cov xuab zeb nplej rau hauv ib qho kev sib koom ua ke, tsim kom muaj pwm ruaj khov thiab muaj zog rau casting hlau qhov chaw.
Siv cov xuab zeb-coated hauv cov xuab zeb casting muaj ntau qhov zoo dua li cov xuab zeb ntsuab los yog cov txheej txheem xuab zeb qhuav. Resin-xuab zeb pwm muaj zog dua thiab muaj qhov ruaj khov zoo dua piv rau cov xim ntsuab-xuab zeb pwm, ua rau muaj qhov tseeb dua thiab zoo ib yam. Lub sijhawm kho rau furan-xuab zeb pwm yog luv dua li lub sij hawm ziab kom qhuav rau cov pwm ntsuab-xuab zeb. Furan-xuab zeb pwm feem ntau ua rau castings nrog smoother thiab huv si nto tiav vim txo pwm defects. Resin-xuab zeb pwm tsis tshua muaj deformation los yog pwm tawg thaum lub sij hawm cov hlau pouring, ua rau cov khoom tsim tau ntau dua los ntawm kev ua tsis tiav tsawg, tsawg lossis xoom chav tsis xws luag, lossis txo qhov xav tau tom qab casting fettle.
3. Sodium Silicate lossis Dej iav
Sodium silicate lossis dej iav casting yog txheej txheem xuab zeb tshwj xeeb uas siv cov sodium silicate binder los ua ke cov xuab zeb rau pwm tsim. Cov pwm yog tsim nyob rau hauv ib txwm txoj kev thiab qhuav thiab kho kom tsim tau ib tug meej qauv ntau tshaj li ntsuab-xuab zeb casts. Cov txheej txheem no yog ib txwm nyiam rau ntau qhov sib txawv thiab cov qauv me me, tab sis tej zaum yuav zoo rau kev ua tau zoo thiab tus nqi tshaj los ntawm furan-xuab zeb casting.
Cov pwm no tsis tshua muaj zog hauv kev siv thiab tuav dua li lwm txoj hauv kev. Sodium silicate casting tseem yog siv dav, rau cov txiaj ntsig xws li: qhov zoo ntawm qhov ruaj khov, tus nqi qis, luv luv curing lub sij hawm piv rau ntsuab-xuab zeb pwm, thiab cov ntsiab lus ntawm cov dej noo tsawg dua li ntsuab-xuab zeb casting.
4. Ntsuab xuab zeb
Ntsuab-xuab zeb (los yog greensand) casting yog ib tug dav siv txheej txheem rau manufacturing hlau qhov chaw. Cov xim ntsuab ntawm cov xuab zeb yog vim muaj cov av noo, bentonite av nplaum, thiab cov thee dej hiav txwv. Hiav txwv thee yog hmoov bituminous thee uas coincidentally ntxuav ntawm ntug hiav txwv dej thiab yog "naturally" tam sim no nyob rau hauv puam xuab zeb ua thawj casting nruab nrab. Cov txheej txheem cam khwb cia no muaj qhov tsis zoo ntawm qhov kawg thiab tsawg dua qhov tseeb / rov ua dua dua li cov txheej txheem niaj hnub siv tsawg dua thiab tsis yooj yim binders.
Txawm li cas los xij, ntsuab-xuab zeb casting muaj ntau yam zoo uas ua rau nws siv hnyav, xws li: tsim nyog rau kev tsim ntau yam ntawm qhov ntau thiab tsawg thiab complexities, yooj yim, tsawg heev yuav tsum tau siv, thiab cov xuab zeb yuav tsum tau rov qab siv dua.
