Raws li qhov sib txawv ntawm cov xuab zeb siv los ua cov pwm pwm, cov txheej txheem xuab zeb tuaj yeem muab faib ua ntau hom, xws lintsuab xuab zeb casting, coated xuab zeb casting (plhaub casting), self-hardening xuab zeb casting thiab qhuav xuab zeb casting (poob ua npuas ncauj casting thiab nqus casting). Kab lus no peb yuav qhia ntau yam hauv qab no peb cov txheej txheem xuab zeb casting:
Ntsuab Sand Casting
Cov xuab zeb ntsuab yog qhov sib xyaw ntub dej ntawm cov xuab zeb thiab av nplaum, tsis muaj tshuaj ntxiv. Cov xuab zeb pwm yog nyem ua ke thiab tuav nws cov duab. Kev xaiv ntawm xuab zeb muaj ntau yam ua rau qhov kub thiab txias ntawm cov hlau yog poured. Ntawm qhov kub thiab txias uas tooj liab thiab hlau tau nchuav, cov av nplaum tau ua haujlwm tsis zoo los ntawm tshav kub, uas yog cov av nplaum tsis nthuav dav. Yog li xwb, cov uas nchuav hlau feem ntau ua haujlwm nrog silica xuab zeb uas pheej yig piv rau lwm cov xuab zeb.
Resin-coated Sand Plhaub Casting
Resin binders yog ntuj lossis hluavtaws siab melting point pos hniav. Kuj tseem muaj cov txheej txheem txias txias, uas siv cov khoom siv hluav taws xob hloov hluav taws xob los kho cov ntawv khi. Resin binders yog qhov nrov heev vim tias cov khoom sib txawv tuaj yeem ua tiav los ntawm kev sib xyaw nrog ntau yam khoom ntxiv. Lwm qhov zoo muaj xws li kev sib tsoo zoo, tsis tshua muaj gassing, thiab lawv tawm ntawm qhov chaw zoo ntawm qhov casting. Plhaub pwm casting txheej txheem muaj zoo dua nto tiav, zoo dua dimension tolerances, thiab ntau dua throughput vim txo lub sij hawm voj voog. Cov ntaub ntawv uas tuaj yeem siv nrog cov txheej txheem no yog cam khwb cia hlau, thiab txhuas thiab tooj liab alloys. Covplhaub molding txheej txheemtsim cov nqi txuag kev daws teeb meem rau cov duab nyuaj, cov hlab ntsha siab, qhov hnyav rhiab qhov chaw, thiab cov castings uas yuav tsum tau ua tiav qhov zoo tshaj plaws.
Self-hardening Sand Casting
"Self-hardening xuab zeb" yog ib lo lus uas tshwm sim tom qab kev lag luam foundry tau txais cov tshuaj binders. Nyob rau hauv cov txheej txheem sib tov xuab zeb, ntxiv rau kev ntxiv cov binder, ib tug solidifying (hardening) tus neeg sawv cev uas muaj peev xwm harden lub binder kuj ntxiv. Tom qab molding thiab core ua nrog cov xuab zeb zoo li no, tsis muaj kev kho mob (xws li ziab lossis tshuab ziab khaub ncaws) yog siv los ua cov pwm los yog cov tub ntxhais, thiab cov pwm los yog cov tub ntxhais tuaj yeem ua rau nws tus kheej.
Vim hais tias cov pwm yog tsim nyob rau hauv chav tsev kub thiab tsis xav tau cua sov, tus kheej-hardening xuab zeb casting tseem hu ua tsis muaj-ci casting txheej txheem. Tus kheej-hardening txoj kev yuav muab faib ua acid-catalyzed furan resin thiab phenolic resin xuab zeb self-hardening txoj kev, urethane resin xuab zeb nws tus kheej-hardening txoj kev thiab phenolic monoester nws tus kheej-hardening txoj kev.
Furan resin self-hardening xuab zeb casting txheej txheem ( txheej txheem nobake) siv cov furan cob coated xuab zeb los tsim cov pwm pwm. Tom qab sib tov cov xuab zeb qub (los yog cov xuab zeb reclaimed), kua furan resin thiab kua catalyst tusyees, thiab muab tso rau hauv lub thawv tub ntxhais (los yog xuab zeb lub thawv), thiab tom qab ntawd muab nruj nreem rau hauv pwm los yog pwm hauv lub thawv tub ntxhais (los yog xuab zeb). box) ntawm chav tsev kub. Tom qab ntawd cov pwm casting lossis casting core raug tsim, uas yog hu ua self-hardening txias-core box molding (core), los yog nws tus kheej-hardening method (core).
Post lub sij hawm: Nov-06-2021