(1) Moulds uas muaj ntau feem ntau yields thiab ruaj ntseg qhov ntev yuav tsum tau ua los ntawm cov ntaub ntawv kawm siab. Cov ntaub ntawv zoo li no tuaj yeem siv rau low-vacuum surface hardening kom cov pwm ntawm cov pwm mus rau theem tshiab. (2) Cov khoom ntawm cov pob zeb sib tshooj pauv pwm yog qhov nyuaj, qhov kev txiav txim siab yog siab, thiab kev lag luam raug ntev ntev. Tus nqi ntawm cov mold deb tshaj qhov khoom nqi ntawm cov pwm. Cov pwm no kuj yuav tsum tau ua los ntawm cov ntaub ntawv kawm siab. (3) High-stress molds yog tsim los ntawm cov ntaub ntawv kawm siab thiab lawv lub cev muaj peev xwm yuav kho tau zoo dua los ntawm kev siv cov kev lag luam uas tsis muaj nqi uas tsis muaj nqi. (4) Pwm nrog cov khoom me me, cov qauv yooj yim, kev nyuab siab, yooj yim ua pwm, pwm uas feem ntau tau muab kho, tuaj yeem ua tau ntawm cov khoom qub, hlau los yog hlau. (5) Cov khoom xaiv ntawm cov pwm yuav tsum tau ua ke nrog lub teb chaws cov khoom siv thiab cov khoom hlau nrog cov nplua nuj ntsiab hauv Suav teb yuav tsum xaiv. (6) Cov khoom yuav tsum tau xaiv los ntawm qhov pom ntawm kev tsim kho kom muaj kev vam meej, thiab cov xov tooj tshiab yuav tsum tau siv raws li qhov ua tau kom cov kev tshawb fawb tau hloov mus ua tau zoo, thiab qhov zoo ntawm cov pwm tuaj yeem kho.
