Alloy karfe rasa kumfa simintin gyaran kafa ne karfe simintin simintin kayayyakin simintin gyaran kafa ta rasa kumfa tsarin. Lost Foam Casting (LFC), wanda kuma ake kira Full Mold Casting, wani nau'i ne na samar da ƙarfe tare da busasshen simintin simintin yashi. EPC wani lokaci yana iya zama gajere don simintin simintin gyare-gyaren da za a iya kashewa saboda bacewar ƙirar kumfa sau ɗaya kawai. Bayan an gama tsarin kumfa ta hanyar injina na musamman, sannan ana lulluɓe ƙirar filastik ɗin kumfa tare da abin rufe fuska don samar da harsashi mai ƙarfi don tsayayya da narkakken ƙarfe. Ana saka sifofin kumfa tare da bawo a cikin akwatin yashi, kuma a cika shi da yashi busassun yashi a kusa da su. A lokacin da ake zubawa, ƙarfe mai zafi mai zafi yana sa tsarin kumfa ya zama pyrolyzed kuma ya "bace" kuma ya mamaye kogon fita na tsarin, kuma a ƙarshe an sami simintin gyare-gyaren da ake so.
Bataccen Simintin Kumfa vs Vacuum Casting | ||
| Abu | Batar da Kumfa | Vacuum Casting |
| Dace da Castings | Simintin gyare-gyare kanana da matsakaita tare da hadaddun cavities, kamar toshe injin, murfin injin | Matsakaici da manyan simintin gyare-gyare tare da ƴan ko babu kogo, kamar simintin ƙarfe na ƙarfe, gidaje na axle na simintin ƙarfe |
| Samfura da Faranti | Hanyoyin kumfa da aka yi ta hanyar gyare-gyare | Samfura tare da akwatin tsotsa |
| Akwatin Sand | Shaye-shaye na kasa ko biyar | Shaye-shaye na gefe hudu ko tare da bututun shaye-shaye |
| Fim ɗin Fim | An rufe murfin saman da fina-finai na filastik | Dukkan bangarorin biyu na rabi na akwatin yashi an rufe su da fina-finai na filastik |
| Kayan shafawa | Fenti na tushen ruwa tare da rufi mai kauri | Fenti na tushen barasa tare da murfin bakin ciki |
| Yashi Molding | Yashi mai bushewa | Yashi bushe mai kyau |
| Gyaran Jijjiga | 3D Jijjiga | Vibration na tsaye ko a tsaye |
| Zubawa | Zuba Mara Kyau | Zuba Mara Kyau |
| Tsarin Yashi | Rage matsa lamba mara kyau, juya akwatin don sauke yashi, sannan a sake amfani da yashi | Sauke matsa lamba mara kyau, sannan busassun yashi ya faɗi cikin allon, kuma ana sake yin amfani da yashi |
