Hanyar samar da mafi yawan gama gari don blanks piston aluminium shine hanyar simintin ƙera ƙarfe. Musamman ma, kayan aikin na'ura na CNC na yanzu sun fara sarrafa kayan ƙarfe na yanzu, wanda zai iya tabbatar da girman girman girman girman girman, yawan aiki da ƙananan farashi. Don rami mai rikitarwa mai rikitarwa, ana iya raba ginshiƙi na ƙarfe zuwa guda uku, biyar ko bakwai don yin gyare-gyare, wanda ya fi rikitarwa kuma ba mai dorewa ba. Wannan hanyar simintin nauyi wani lokaci yana haifar da lahani kamar fashe masu zafi, pores, ramuka, da sako-sako na babur piston.

A cikin injunan ƙarfafawa, za a iya amfani da pistons na aluminum gami da ƙirƙira, waɗanda ke da ingantaccen hatsi, ingantaccen rarrabawar ƙarfe mai ƙarfi, ƙarfi mai ƙarfi, tsarin ƙarfe mai kyau da kyakkyawan yanayin zafi. Don haka zafin fistan ya yi ƙasa da na simintin nauyi. Piston yana da tsayi mai tsayi da ƙarfi mai kyau, wanda ke da amfani don rage yawan damuwa. Duk da haka, hypereutectic aluminum-silicon alloys dauke da fiye da 18% silicon ba su dace da ƙirƙira saboda brittleness, da kuma ƙirƙira oyan haifar da babban saura danniya a cikin piston. Sabili da haka, tsarin ƙirƙira, musamman ma zafin ƙirƙira na ƙarshe da zafin jiki na zafin jiki dole ne ya dace, kuma yawancin fasarar piston da aka ƙirƙira yayin amfani yana haifar da raguwar damuwa. Forging yana da tsauraran buƙatu akan sifar tsarin piston da tsada mai tsada.

An fara amfani da tsarin ƙirƙira ƙirƙirar ruwa a lokacin yakin duniya na biyu, kuma an inganta shi kuma an yi amfani da shi zuwa digiri daban-daban a ƙasashe daban-daban na duniya. Ta sami ci gaba cikin sauri cikin shekaru goma da suka gabata. Kasata ta fara amfani da wannan tsari a cikin 1958 kuma tana da tarihin shekaru 40.

Liquid die forging shi ne a zuba wani adadin ruwa na karfe a cikin wani karfe, a matsa da naushi, ta yadda ruwan ruwan ya cika rami da sauri fiye da yadda ake yin simintin mutuwa, kuma ya yi crystallizes da ƙarfafawa a ƙarƙashin matsin lamba don samun mai yawa. tsari. Samfuran ba tare da raguwar rami ba, raguwar porosity da sauran lahani na simintin gyaran kafa. Wannan tsari yana da halaye biyu na simintin gyare-gyare da ƙirƙira.