Ma'anarsa
Yin simintin saka hannun jari, wanda kuma aka sani da simintin kakin zuma da aka rasa ko simintin gyare-gyare, daidaitaccen hanyar simintin ne ba tare da yankewa ba. Ana amfani da kayan gyare-gyaren saka hannun jari (yawanci ƙananan kayan narkewa kamar kakin zuma) don yin samfuran gyare-gyaren saka hannun jari da samar da tsari. Sa'an nan kuma ana amfani da fenti (kayan gyara) zuwa saman tsarin. Bayan bushewa da ƙarfafawa, tsarin yana mai tsanani don narke kayan gyare-gyare. An kafa harsashi mai zurfi, kuma ana zuba ruwan karfe a ciki bayan zafin jiki mai zafi, kuma ana samun simintin bayan tsaftacewa.
Halayen simintin zuba jari
1.Castings suna da daidaito mai girma (CT4-CT7); ƙananan ƙarancin ƙasa (Ra1.6-6.3um). An rage izinin yankan simintin gyare-gyare, kuma ana iya samun simintin simintin kusa-net.
2.Mai ikon samar da simintin gyare-gyare na bakin ciki tare da siffofi masu rikitarwa. Kamar mai karɓa na gaba (wanda ya ƙunshi zobba na ciki da na waje da ruwan wukake 14). Misali, ruwan injin yana da ƙaramin kauri na bango na 0.7mm.
3.Alloy kayan ba a iyakance. Karfe, jan karfe, aluminum, titanium, magnesium, da dai sauransu. Nickel tushen high zafin jiki gami da high narkewa maki, low narkewa batu kamar zinc da tin.
4.Fitar da saka hannun jari yana da wasu iyakoki. Tsarin yana da wahala, sake zagayowar samarwa yana da tsayi, kuma girman simintin kada ya zama babba.
Tsari kwarara
1.Design da ƙera gyare-gyare.
Tsarin da ake amfani da shi don yin ƙirar kakin zuma ana kiransa stamper. Ana buƙatar samun daidaiton girman girman girma da ƙarewar ƙasa. An yi shi da aluminum gami, karfe, fusible gami, plaster ko roba abu bisa ga samar tsari.
2.Yin kakin zuma alamu.
Abubuwan da ke cikin kakin zuma yawanci ana yin su ne da 50% paraffin da 50% stearic acid. Bayan narkewa, yi amfani da latsa kakin zuma don danna kayan kakin zuma a cikin injin. Bayan daskarewa sai a fitar da shi a zuba a cikin ruwan sanyi domin ya huce don hana nakasawa. Ana yin gyare-gyaren sprue da sandar katako ko aluminium da aka tsoma a cikin wani harsashi na kakin zuma mai tsawon 2-3mm, sannan a yi amfani da tsarin kakin zuma zuwa gyambon sprue tare da wuka mai dumama lantarki don samar da tsari.
3. Yin Shell.
A tsoma tsarin a cikin wani shafi da aka yi da foda na quartz da gilashin ruwa (ko silica sol), cire shi, yayyafa shi da yashi ma'adini, sa'an nan kuma sanya shi a cikin wani hardener (wanda aka fi amfani da shi ammonium chloride ko aluminum chloride) don taurara shi a cikin Layer na harsashi kuma maimaita ayyukan da ke sama har sai an kafa kauri na 5-10mm.
4.Gwargwado da gasasshe.
Saka harsashin da aka ƙera a cikin tanki mai zafi a 95-100 ℃ don narke ƙwayar kakin zuma kuma ya sha ruwa. Sa'an nan kuma gasa da mold harsashi a 800-900 ℃ (ruwa gilashin mold harsashi) don ƙara ƙarfi da kuma cire mold harsashi. Danshi, ragowar kakin zuma, saponification, da dai sauransu.
5.Zubawa da tsaftacewa.
Sau da yawa ana zubar da harsashi da aka kora yayin da yake zafi bayan an sake shi daga tanderun don samar da simintin gyare-gyaren bango. Bayan an sanyaya simintin gyare-gyaren, a lalata harsashi, a fitar da simintin kuma yanke tsarin zubar da ruwa, sannan a aiwatar da aikin simintin bayan aiwatarwa, wato, yi amfani da sandblasting, fashewar fashewar, alkali tafasa da hanyoyin tsaftacewa na electrochemical don cire ragowar harsashi da manne a saman da kogon ciki na simintin. Ana cire yashi, chloride, da sauransu don samun simintin gyare-gyare tare da filaye masu santsi.
