Resin xuab zeb yog cov xuab zeb molding (los yog cov xuab zeb tseem ceeb) npaj nrog cov cob ua cov ntawv khi. Cov resin coated xuab zeb casting kuj hu uaplhaub moldingvim hais tias cov resin xuab zeb pwm tuaj yeem ua rau hauv lub plhaub muaj zog tom qab cua sov ntawm chav tsev kub (tsis muaj ci los yog nws tus kheej-hardening txheej txheem), uas txawv ntawm covntsuab xuab zeb casting txheej txheem. Kev siv cov furan resin ua cov ntaub ntawv rau molding xuab zeb yog ib qho kev hloov loj hauv cov txheej txheem xuab zeb casting. Txij li thaum lub advent ntawm txoj kev no, nws tau nyiam cov xim ntawm kev lag luam casting thiab tau tsim sai heev. Raws li cov resin rau casting pwm (core) xuab zeb binder, ntau yam thiab zoo yog tas li nce, uas muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm ntau yam casting alloys.
Vim yog siv cov xuab zeb resin, ntau cov txheej txheem molding tshiab (core) tau tshwm sim ib qho tom qab, xws li lub plhaub core (zoo li), lub thawv kub tub ntxhais, lub thawv txias tub ntxhais, nws tus kheej hardening xuab zeb core, thiab lwm yam. Tam sim no, kev siv ntawm resin xuab zeb tau dhau los ua ib qho ntawm cov xwm txheej hauv kev tsim khoom loj ntawmzoo castings. Nyob rau hauv cov xuab zeb casting kev cob qhia ntawm ib-thooj thiab loj ntau lawm, zus tau tej cov xuab zeb cores thiab xuab zeb pwm nrog resin xuab zeb yog ib tug txheej txheem, thiab kev loj hlob tau tshwj xeeb tshaj yog ceev nyob rau hauv xyoo tas los.
Qhov zoo ntawm Resin Coated Sand Casting:
1. Cov castings muaj qhov zoo ntawm qhov zoo thiab qhov siab qhov tseeb;
2. Tsis tas yuav qhuav, muaj rau shortening lub voj voog ntau lawm;
3. Cov txheej txheem xuab zeb casting txheej txheem txuag hluav taws xob vim tias cov pob zeb xuab zeb pwm (core) muaj lub zog siab, zoo huab cua permeability, ob peb qhov tsis xws luag thiab tsis kam lees;
4. Resin xuab zeb muaj fluidity zoo thiab yooj yim rau compact;
5. Zoo collapsibility, yooj yim rau co tawm thiab ntxuav, zoo heev txo kev siv zog.
Disadvantages ntawm Resin Sand Pwm Casting Txheej Txheem:
1. Vim tias cov xuab zeb nyoos loj, cov duab, cov ntsiab lus ntawm sulfur dioxide thiab alkaline tebchaw tuaj yeem muaj kev cuam tshuam ntau dua rau kev ua haujlwm ntawm cov xuab zeb, cov kev xav tau rau cov xuab zeb nyoos yog siab dua;
2. Qhov kub thiab av noo ntawm kev khiav hauj lwm ib puag ncig muaj kev cuam tshuam ntau dua ntawm kev sib zog ceev thiab hardening lub zog ntawm cov xuab zeb resin;
3. Muab piv nrog cov khoom siv hauv cov khoom siv tsis zoo, cov xuab zeb resin muaj cov roj ntau dua;
4. Cov resin thiab catalyst muaj ib tug pungent tsw, thiab qhov cua zoo nyob rau hauv lub rhiav yuav tsum tau;
5. Tus nqi ntawm resin yog siab dua ntsuab xuab zeb casting.
Feem ntau siv cob xuab zeb yogfuran resin self-hardening xuab zeb. Furan resin yog ua los ntawm furfuryl cawv thiab muaj npe tom qab lub nplhaib furan tshwj xeeb hauv nws cov qauv. Nyob rau hauv cov nqe lus ntawm nws cov qauv yooj yim, muaj furfuryl cawv furan resin, urea formaldehyde furan resin, phenolic furan resin thiab formaldehyde furan resin. Furan resin feem ntau yog siv los ua cov ntawv khi thaum npaj cov resin self-hardening xuab zeb hauv kev tsim khoom. Furan resin siv rau kev teeb tsa tus kheej xuab zeb muaj cov ntsiab lus siab ntawm furfuryl cawv, txhim kho resin cia kev ua tau zoo, siab thermal zog, tab sis nce nqi.
Furan resin self-hardening xuab zeb yog hais txog hom (core) xuab zeb uas furan resin binder undergoes tshuaj tiv thaiv nyob rau hauv qhov kev txiav txim ntawm catalyst thiab solidifies ntawm chav tsev kub. Furan resin xuab zeb feem ntau yog tsim los ntawm cov xuab zeb nyoos, furan resin, catalyst, additives, thiab lwm yam. Qhov zoo thiab kev ua tau zoo ntawm ntau yam khoom siv raw yuav muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm cov xuab zeb thiab qhov zoo ntawm castings, yog li nws tseem ceeb heev rau kom raug xaiv ntau yam raw khoom ntawm resin xuab zeb.
Post lub sij hawm: Mar-08-2021