Ƙirƙirashine a sanya karfen babu komai a sama da kasaƙirƙiramutu a cikin mold jam'iyyar tilasta filastik kwarara gyare-gyaren, don samun siffar daƙirƙiram da mold chamber, ake magana a kai a matsayin mutu forging. Dangane da ƙayyadadden nau'in ƙirƙira mai ƙirƙira, ana iya raba shi zuwa ƙayyadaddun mutun ƙirƙira da tayamutu ƙirƙira.
1. Kafaffenmutu ƙirƙira ƙirƙiramutu yana kunshe da mutuƙar babba da mutuƙar ƙasa, bi da bi gyarawa a kan guduma kan guduma da toshe guduma na mutuƙar ƙirƙira guduma, jeri na babba da ƙananan mutu yana da garantin mutuƙar guduma. Lokacin da ake yin ƙirƙira, za a sanya blank ɗin mai zafi a cikin ƙananan ɗakin da aka mutu, kuma kan guduma ya kori mutun na sama don ƙirƙira, ta yadda ƙarfen ya gudana kuma ya cika ɗakin mutuwar don samar daƙirƙira, sannan a danne karfen da ya wuce gona da iri a cikin tsagi mai tashi don samar da gefen tashi, sannan a yanke shi bayanƙirƙira. Mutu ƙirƙirasassa da hadaddun siffofi, bukatar bude da dama mutu gundura gamutu ƙirƙira, ta yadda billet a cikin da yawa ya mutu a hankali yana tasowa, a ƙarshe ya ƙirƙira cikin siffar da ake so a ƙarshen mutuwa. Kafaffenmutu ƙirƙirayana da abũbuwan amfãni daga high yawan aiki,inganci mai kyau,hadaddun siffar da ceton kayan ƙarfe, wanda shine ainihin hanyar mutuwaƙirƙira. Amma yana buƙatar tsadamutu ƙirƙirakayan aiki da mutu, girman girmanƙirƙirayana iyakance da yawan adadin mutuƙirƙirakayan aiki. Saboda haka, ya dace kawai don samar da taro.

2. Tayamutu ƙirƙiraana yin jabun taya mutunƙirƙira kyautakayan aiki, ba tare da mutuwar kayan aikin ƙirƙira ba, ƙirar ƙirƙira da aka yi amfani da ita tana da sauƙi mai sauƙi, babban aiki, ƙirar ƙirƙira ya fi kyau, zai iya adana ƙarfe, rage farashi. Duk da haka, a gaba ɗaya taya ta mutu ƙirƙira, babba da ƙananan mutu dole ne a motsa su da hannu, wanda ke da ƙarfin aiki mai girma kuma yana rinjayar ci gaba da haɓaka aiki. Sabili da haka, ana amfani da shi sosai wajen samar da ƙananan ƙirƙira a matsakaici da ƙananan batches. A mafi yawan ayyukan ƙirƙira na mutuƙar rufaffiyar, zafin kayan ƙirƙira ya fi na mutu. Tasirin nau'in damuwa akan yawan amfanin ƙasa ba shi da mahimmanci, amma tasiri akan saurin nakasawa yana ƙara zama mahimmanci. Saboda haka, dogaro da yawan amfanin ƙasa akan ƙimar naƙasa a fili ya bambanta ga ƙarfe daban-daban da gami lokacin da yawancin karafa ke da zafi ƙirƙira sama da recrystallization zafin jiki. A yanayin zafi na ɗaki, tasirin nakasar ƙanƙara akan damuwa na yawancin karafa yana da ƙanƙanta.