Kev tsim khoob nruab tse no yog ib qhov tseem ceeb hauv kev tsim khoob nruab tse uas muaj feem ntau rau qhov txiaj ntsig ntawm qhov khoom, kev tsim khoob zoo, thiab lwm yam kev lag luam. Yog li siv cov ntaub ntawv hlaws los rau hauv phab ntsa, lub khoob nruab tse yuav tsum muaj qhov chaw, qhov lo, thiab hom uas tau raug tsim los ntawm kev kawm txog kom tau qhov zoo tshaj plaws. Kev txiav txim siab saib xyuas qhov chaw khoob nruab tse yuav tsum xav txog ntau yam, xws li kev pib sau npe, qhov chaw ntawm cov seem ntawv sau, kev txiav txim siab ntawm cov duab ntawv sau rau hauv cov ntaub ntawv, thiab cov lus nug hauv kev tshawb nrhiav. Cov hom khoob nruab tse uas feem ntau siv yog edge gates, uas yog qhov yooj yim thiab zoo rau cov khoom loj; tunnel lossis submarine gates, uas tuaj li tuaj lawm thaum tshuab ntxuav khoom; thiab direct sprue gates, uas siv tau rau qhov chaw tsim khoom loj thiab dav. Cov kev tsim khoob nruab tse siv cov khoob nruab tse uas muaj kev cuam tshuam rau teeb liab, uas tso cai rau cov ntaub ntawv nyob deb ntawm qhov hlaws, thim los ntawm qhov tsis tshaib thiab pab rau kev xa khoob nruab tse zoo dua. Qhov ntev thiab qhov dav ntawm khoob nruab tse yuav tsum muaj kev piav qhia meej meej ntawm qhov viscosity ntawm ntaub ntawv, qhov dav ntawm khoom, thiab qhov ntev ntawm kev pib kom tau qhov siab txaus, tab sis tseem tiv thaiv kev pib ntau uas tuaj yeem ua rau cov ntaub ntawv puav tseg. Kev tsim khoob nruab tse kuj muaj feem rau qhov appearance ntawm qhov khoob nruab tse, uas yuav tsum muaj qhov tsawg tshaj plaws rau qhov chaw tshawb nrhiav lossis tseem tshem tawm rau qhov chaw tsis tseem ceeb. Rau cov phab ntsa muaj ntau chaw tsim khoom, cov kev tsim khoob nruab tse uas muaj qhov lo sib npaug yuav pab rau kev pib khoom sib npaug. Kev tsim khoob nruab tse ntxiv tshiab siv cov software simulation los paub qhov pib, qhov siab, thiab qhov kub, uas pab rau cov neeg tsim khoob nruab tse pom qhov zoo tshaj plawsก่อนที่จะสร้างเครื่องมือ. Lub khoob nruab tse kuj muaj feem rau qhov sijhawm tsim khoob nruab tse, vim tias cov khoob nruab tse loj dua yuav xav tau sijhawm ntxuav ntau dua. Cov lus nug hauv kev daws teeb meem kuj muaj feem rau qhov khoob nruab tse nyiag mus li thaum siv cov ntaub ntawv nyiag, uas xav tau cov ntaub ntawv khoob nruab tse thiab kev tsim khoob nruab tse zoo. Ib qhov khoob nruab tse zoo yuav pab tau qhov sib piv zoo ntawm kev pib ntev, kev pib txaus, kev tsis muaj kev puav tseg, thiab qhov appearance zoo, uas muaj feem ntau rau qhov kev lag luam.