Kev txhaj tshuaj molding yog cov txheej txheem tsim feem ntau siv rau kev tsim cov yas. Cov khoom lag luam ntau yam yog tsim los siv kev txhaj tshuaj molding, uas sib txawv ntau ntawm lawv qhov loj me, qhov nyuaj thiab siv. Kev txhaj tshuaj molding txheej txheem yuav tsum tau siv lub tshuab tshuaj txhaj tshuaj, khoom siv raw khoom yas, thiab txhaj tshuaj pwm. Cov yas tawg hauv lub tshuab txhaj tshuaj thiab tom qab ntawd txhaj rau hauv pwm, qhov twg nws txias thiab solidifies rau qhov kawg. Cov kauj ruam hauv cov txheej txheem no tau piav qhia ntau dua nyob rau ntu tom ntej.
Tom qab lub voj voog txhaj tshuaj molding, qee qhov kev ua haujlwm tom qab yog feem ntau yuav tsum tau ua. Thaum lub caij txias, cov khoom siv hauv cov kwj ntawm cov pwm yuav ua kom ruaj khov txuas rau ntawm ib feem. Cov khoom siv dhau heev no, nrog rau ib qho nyem uas tau tshwm sim, yuav tsum tau muab txiav los ntawm ib feem, feem ntau yog siv cov tshuab txiav. Rau qee hom khoom siv, xws li thermoplastics, cov khoom siv tawg los uas tau los ntawm qhov kev txiav no tuaj yeem rov qab los ntawm kev muab tso rau hauv cov yas sib tsoo, tseem hu ua regrind machine lossis granulators, uas regrinds cov khoom seem rau hauv pellets. Vim muaj qee qhov kev cuam tshuam ntawm cov khoom txav, qhov hloov tshiab yuav tsum tau muab sib xyaw nrog cov khoom siv raw hauv qhov sib piv kom zoo yuav rov qab siv rau hauv cov txheej txheem txhaj tshuaj molding.
