Amanyathelo okukhusela i-disc ye-brake shrinkage kunye nokukhululeka: isinyithi esinyibilikisiweyo singeniswa kwi-sprue ngokulinganayo ukunciphisa ukugqithiswa kwendawo yediski kunye nokukhusela ukubunjwa kweendawo ezishushu ezenziweyo. Ngokombono wokuqiniswa okulinganayo kweentsimbi zokusa, iindawo ezincinci ezinodonga olucekeceke ngakumbi, likhulu ixabiso le-shrinkage, kwaye kugxininiswe ngakumbi ekunciphiseni. Imowudi yokutyisa inokuba yinkqubo yesango lokutya okanye isondlo sokunyuka. Xa isicwangciso sokutya senkqubo yokugaya samkelwa, intloko ye-sprue inokunyuswa ngokufanelekileyo, njengokunyusa ukuphakama kwebhokisi eliphezulu, ukongeza isango lesango, njl. Imbaleki yomnqamlezo yeyona yunithi iphambili yokutyibiliza kunye nomoya odadayo. Xa isetyenziselwa ukongezwa kwe-shrinkage, ubukhulu becandelo layo bunganyuswa ngokufanelekileyo; I-sprue yangaphakathi iya kuba mfutshane, incinci kwaye ibanzi. I-sprue yangaphakathi imfutshane (i-sprue enqamlezileyo isondele kwi-casting). Ngenxa yempembelelo ye-thermal ye-casting kunye ne-sprue enqamlezileyo kunye nefuthe lokuhamba kokuzaliswa kwentsimbi etyhidiweyo kunye nokutya, i-sprue yangaphakathi ayiyi kuqiniswa kwaye ivalwe kwangaphambili, kwaye iya kuhlala ingavaliwe ixesha elide. I-Thin (ngokubanzi) inokuthintela ukubunjwa kwamalungu ashushu oqhagamshelwano kwi-inlet ye-sprue yangaphakathi. Ububanzi kukuqinisekisa indawo eyaneleyo yokuphuphuma. Nje ukuba i-casting ingene kwinqanaba lokuqiniswa okulinganayo lokwandiswa kunye nokuncipha kwe-graphitization, isinyithi esinyibilikisiweyo kwi-inganite siya kuyeka ukugeleza kwaye siya kuqina kwaye siyeke ngexesha lokuphucula izinga lokusetyenziswa kwe-graphitization self feeding, okuyimpembelelo yokulungelelanisa i-adaptha emfutshane, ebhityileyo kunye nebanzi (i-riser neck) ekutyeni. Kwezinye ii-castings ezinobunzima obukhulu, isikhuphukeli singasetwa ukuze sityiswe. Isikhuphukeli sisetiwe ngcono ekuqaleni kwe-sprue yangaphakathi, okanye isikhuphukeli singasetwa kumbindi ophakathi ukondla idiski kwelinye icala le-sprue yangaphakathi. Kwiindawo ezincinci ezinodonga oluncinci, amanyathelo okwesibini anoculation angamkelwa, oko kukuthi, i-inoculant inokongezwa kwipakethe encinci ye-instantaneous inoculation ukuphucula umphumo we-inoculation kunye nokukhuthaza i-nucleation kunye nokukhula kwegraphite. Inokongezwa phantsi kwepakethe kwaye ihlanjwe kwintsimbi etyhidiweyo.
