Matakan don hana raguwar faifan diski da sako-sako: ana shigar da narkakkar baƙin ƙarfe a cikin sprue daidai gwargwado don rage zafi na gida na diski da hana samuwar wuraren zafi na wucin gadi. Dangane da ra'ayi na daidaitaccen ƙarfi na simintin ƙarfe, ƙananan sassa masu sirara masu sirara, mafi girman ƙimar raguwar, da ƙarin fifiko kan raguwa. Yanayin ciyarwa na iya zama tsarin ciyarwar gating ko ciyarwar riser. Lokacin da aka karɓi tsarin ciyarwa na tsarin gating, ana iya ƙara sprue kai daidai, kamar haɓaka tsayin akwatin babba, ƙara zoben ƙofar, da sauransu; Mai tseren giciye shine babban sashin skimming da iska mai iyo. Lokacin da aka yi amfani da shi don kari na raguwa, ana iya ƙara girman sashinsa yadda ya kamata; Ƙwararren ciki zai zama gajere, bakin ciki da fadi. Ƙunƙarar ciki gajere ne (maɓalli mai jujjuyawa yana kusa da simintin gyare-gyare). Saboda tasirin zafi na simintin gyare-gyare da kuma madaidaicin sprue da tasirin kwararar ƙarfe na narkewa da ciyarwa, sprue na ciki ba zai ƙarfafa shi ba kuma a rufe shi a gaba, kuma zai kasance ba a toshe shi na dogon lokaci. Bakin ciki (gaba ɗaya) na iya hana samuwar haɗin gwiwa mai zafi a mashigar sprue na ciki. Faɗin shine don tabbatar da isassun yanki mai ambaliya. Da zarar simintin gyare-gyaren ya shiga daidaitaccen matakin ƙarfafa graphitization na haɓakawa da haɓakawa, narkakken ƙarfe a cikin ingate ɗin zai daina gudana kuma zai ƙarfafa kuma zai tsaya cikin lokaci don haɓaka ƙimar amfani da graphitization ciyar da kai, wanda shine tasirin daidaitawa na gajere, bakin ciki. da faffadan ingate (riser wuyansa) akan ciyarwa. Ga wasu simintin gyare-gyare tare da raguwa mai tsanani, ana iya saita mai tashi don ciyarwa. An fi saita mai tashi a farkon sprue na ciki, ko kuma ana iya saita mai tashi a tsakiyar tsakiya don ciyar da diski a gefe ɗaya na sprue na ciki. Don ƙananan sassa na bango na bakin ciki, ana iya ɗaukar matakan rigakafi na biyu, wato, za'a iya ƙara inoculant a cikin ƙaramin kunshin don yin rigakafin gaggawa don inganta tasirin inoculation da inganta haɓakawa da haɓakar graphite. Ana iya ƙarawa a ƙasan kunshin kuma a wanke shi cikin narkakken ƙarfe.
