1. Ukususela ekucuthekeni kweumbhobho wensimbi engenasici i-castings idlula kakhulu i-shrinkage yentsimbi etyhidiweyo, ukwenzela ukuthintela ukuncipha kunye nokunciphisa iziphene ze-castings, ininzi yemilinganiselo esetyenziswa kwinkqubo yokuphosa i-rivers, isinyithi esibandayo kunye nenkxaso-mali yokufezekisa ukuqina okuqhubekayo.

2. Ukuze uthintele i-shrinkage, i-shrinkage, i-porosity kunye ne-crack defects ye-tube yensimbi engenasici, ubukhulu bodonga kufuneka bufane, ugweme izakhiwo ezibukhali kunye ne-right-angle, zongeza ii-chips zokhuni kwintlabathi yokubumba, yongeza i-coke kumbindi; kwaye usebenzise i-core hollow kunye ne-oyile yelitye lentlabathi ukuphucula umnyinyiva kunye nokukwazi ukuphefumla kwesanti okanye umbindi.

3. Ngenxa yokungahambi kakuhle kwamanzi ensimbi etyhidiweyo, ukwenzela ukukhusela ukuhlukana okubandayo kunye nokuphosa okungonelanga, ubukhulu bodonga lokubunjwa akufanele bube ngaphantsi kwe-8mm;ukuphosa okomileyo okanye ukuphosa okushushu kufuneka kunyuse ngokufanelekileyo ubushushu bokuphosa, ngokubanzi 1520 ~ 1600℃.Ngenxa yokuba ubushushu bokuphosa buphezulu, iqondo lobushushu obuphezulu liphezulu, ixesha lokugcinwa kolwelo lide, kwaye ubumanzi bunokuphuculwa.Nangona kunjalo, ukuba iqondo lobushushu liphezulu kakhulu, liya kubangela iziphene ezifana neenkozo ezirhabaxa, iintanda ezishushu, iintunja kunye nokuncamathela kwesanti.