1. Saib cov impurities: Raws li cov xim iav hlaws yog cov txheej txheem molding thib ob, feem ntau cov iav hlaws siv hluav taws xob floatation los tsim cov iav hlaws. Cov khoom siv raw yog siv dua iav. Cov impurities yuav koom nrog hauv cov txheej txheem tsim khoom thiab hauv cov khoom siv raw. Qhov no impurity yog manifested nyob rau hauv cov xim dub nyob rau hauv cov khoom, uas yuav zam tsis tau. Txawm li cas los xij, qhov tsawg impurities hauv cov xim zoo nkauj iav hlaws yog tswj tau, qhov zoo dua. Thaum koj muab ib txhais tes ntawm iav hlaws rau hauv koj txhais tes, yog tias koj tuaj yeem pom 3-4 qhov muag dub nrog qhov muag liab qab, suav tias yog qib siab tshaj, thiab tsawg dua 3 cov ntsiab lus yog suav tias yog qib siab tshaj! Feem ntau, muaj 5-6 cov ntsiab lus dub, ntau dua 8 cov ntsiab lus yog qhov tsis zoo me ntsis, thiab ntau dua 10 cov ntsiab lus yog cov khoom tsis zoo lossis tsis tsim nyog.
2. Kov cov hlaws iav: Muab me me ntawm cov xim iav hlaws rau hauv koj txhais tes thiab rub nws. Yog hais tias nws zoo nkaus li du thiab puag ncig, nws txhais tau hais tias lub roundness yog siab, lub sphericity yog zoo, thiab nws yog ib tug zoo zoo iav hlaws dai. Yog tias koj nyob twj ywm, lossis paddle koj txhais tes, nws yog ib qho khoom tsis raug. Rau
3. Co cov iav hlaws: muab cov iav hlaws xim rau hauv lub thawv thiab co sab laug thiab sab xis lossis nce thiab nqis, thiab tom qab ntawd pom cov txheej txheej. Txawm hais tias iav hlaws yog cov khoom sib xyaw nrog ntau qhov sib txawv, qhov sib piv ntawm cov khoom hauv txhua ntu muaj qhov sib txawv, yog li txheej txheej yuav zoo ib yam thiab tsis muaj qhov sib txawv ntau. Yog tias koj pom tias muaj ntau cov khoom zoo los yog ib nrab ntawm lawv nyob rau hauv cov hmoov tom qab delamination, ces cov iav hlaws no yuav tsum tsis tsim nyog. Raws li ib txwm muaj, cov khoom zoo yuav tsis pub tshaj 10% ntawm tag nrho cov nyiaj, ntau dhau yog cov khoom tsis zoo.
