Casting sanngara : Casting sanngara keewɗo huutoreede e nder gollordu valve ina waawi kadi fecceede e sifaaji sanɗaaji keewɗi ko wayi nonjaareendi ɓuuɓndi, njaareendi yoorndi, njaareendi gilaas ndiyam e njaareendi furan resin no-bakefawaade e binnditagol ceertungol ngol.
(1) Sanngara ɓaleejo ko feere mooftugol ɗo bentonite huutortee ngam jokkondirde e golle ɗee. Sifaa maggal ko : mooftirgel ceene timmungel ngel alaa e sago yoortee walla waɗee e nder safaara keeriiɗo, mooftirgel ceene ngel ina jogii semmbe ɓuuɓɗo, kadi core ceene ɗee e koɗorɗe mum en ina njogii concessions ɓurɗe moƴƴude, ko ɗum huunde weeɓnde ngam werlaade laɓɓingol e ceene faddotooɗe. Moulding peewnugol njuuteendi ina toowi, njuuteendi peewnugol ina juuti, kadi njoɓdi kaɓirɗe ina famɗi kadi, ko ɗum huunde weeɓnde ngam yuɓɓinde peewnugol liggorde mooɓondiral. Nafooje maggal ko : ɓulli ina keewi ŋakkeende ko wayi no pores, naatgol ceene, e ceene ɓuuɓɗe, kadi sifaa ɓulli ɗii, haa teeŋti noon e sifaa nder mum, ina woɗɗi no feewi.
(2) Sanngara yoorɗo ko peeje mooftugol kuutortooɗe loopal ngam waɗde ɗum jokkere enɗam, kadi bentonite seeɗa ina waawi ɓeydude semmbe mum ɓuuɓɗo. Sifaa maggal ko : mooftirgel ceene ina haani yoorde, ina jogii ɓuuɓri moƴƴiri e ɓuuɓri henndu, weeɓaani feewnude ŋakkeende ko wayi no lootgol ceene, ɓuuɓri ceene, e ɓuuɓri, kadi sifaa ndernderiijo ɓuuɓri ndii kadi ina moƴƴi no feewi. Nafooje maggal ko : kaɓirɗe yoorgol ceene ina ɗaɓɓiree, kadi njuuteendi peewnugol ngol ina juuti no feewi.
(3) Sanngara silikaat sodium ko feere peewnugol huutoraade gilaas ndiyam ngam jokkondirde. Sifaa maggal ko : gilaas ndiyam ina jogii gollal waawde tiiɗtinde otomatik caggal nde hawri e CO2, ina waawi kadi jogaade nafooje e nafooje keewɗe e mbaydiiji tiiɗtingol gaas e peewnugol core. Kono tan, ina woodi caɗeele ko wayi no ŋakkeende ɓuuɓgol kosam, caɗeele laɓɓingol ceene ngam ɓuuɓnude, e ŋakkeende mbayliigu ceene kuutorteeɗe.
(4) Furan resin no-bake njaareendi molde ko feere golle ɓuuɓgol e furan resin ko binder. E nguleeki suudu, njaareendi mooftirndi ndii ina selli sabu mbaydi kemikal (reaction chimique) gonndi e les golle sellinde ndee. Sifaa maggal ko : mooftirgel sanngara ngel alaa ko haani yoorde, zum ina usta no feewi vursugol peewnugol ngol, ina hisna semmbe. Resin molding ceene ina weeɓi compact e ina jogii collapsibility moƴƴo, e ceene molding castings ina waawi kadi weeɓde laɓɓineede, dimensionnel accuracy castings ina toowi, e surface finish ina moƴƴi, ko ɗuum waawi ɓeydude no feewi kalite castings. Nafooje maggal ko : sarɗiiji kalite ngam sanngara ɓuuɓɗo ina toowi kadi, nokku peewnugol oo ina jogii uurngol ɓuuɓngol seeɗa, kadi njoɓdi resin ina toowi kadi. Laawol jillondirde ceene ceene ceene ceene cemmbinɗe resin furan : ceene ceene cemmbinɗe hoore mum resin ɓuri moƴƴude ko waɗeede e ceene ceene jokkondirɗe, ɓeyda heen ceene ɓuuɓɗe, resin, curing agent ekn e nder mbaydi, e jillondirde ɗe e yaawre. Jillondira e huutoraade kala sahaa. Yamiroore ɓeydugol geɗe ceertuɗe nde ceene resin jillondirta ko nii : ceene asliije + ceene ɓuuɓɗe (asid p-toluensulfonik) – (120-180S) – ceene + silan – (60-90S) – ceene (5) Sifaa ceene tippudi Laawol peewnugol : ɓuuɓri laaɓtundi.
Waktu posto: 17-17-2022
