1. Kuyambira kuchepa kwachitoliro chosapanga dzimbiri castings kwambiri kuposa shrinkage chitsulo chotayidwa, pofuna kupewa shrinkage ndi shrinkage zofooka za castings, ambiri miyeso ntchito poponya ndi risers, chitsulo ozizira ndi subsidies kukwaniritsa kulimba mosalekeza.

2. Pofuna kupewa shrinkage, shrinkage, porosity ndi ming'alu ya chubu chachitsulo chosapanga dzimbiri, makulidwe a khoma ayenera kukhala yunifolomu, kupewa mapangidwe akuthwa ndi oyenera, kuwonjezera tchipisi tamatabwa ku mchenga woumba, kuwonjezera coke pachimake; ndikugwiritsa ntchito tsinde ndi miyala yamchenga yamafuta kuti muwongolere komanso kupumira kwa mchenga kapena pachimake.

3. Chifukwa cha kuchepa kwa madzi achitsulo chosungunuka, pofuna kupewa kulekanitsa kozizira ndi kuponyera kosakwanira, makulidwe a khoma la kuponyera sikuyenera kukhala osachepera 8mm;kuponya kowuma kapena kuponya kotentha kuyenera kuonjezera kutentha kwa mpweya, nthawi zambiri 1520 ~ 1600℃.Chifukwa kutentha kwa mpweya kumakhala kwakukulu, kutentha kwapamwamba kwambiri, nthawi yosungira madzi ndi yaitali, ndipo madzi amatha kusintha.Komabe, ngati kutentha kuli kokwera kwambiri, kungayambitse zolakwika monga njere zouma, ming'alu yotentha, pores ndi mchenga womamatira.