Yas qhov chawyog dav siv nyob rau hauv ntau yam teb vim lawv cov kev ua tau zoo heev thiab tsis muaj nqi. Cov txheej txheem ntawm cov khoom yas feem ntau suav nrog peb kauj ruam: plasticization, molding, thiab tom qab ua tiav.
Ua ntej, plasticization, tseem hu ua melting, yog cov txheej txheem ntawm kev hloov cov khoom yas rau hauv lub xeev molten. Cov txheej txheem no feem ntau ua tiav los ntawm kev pub cov yas pellets rau hauv lub tog raj kheej rhuab ntawm lub tshuab yas txhaj tshuaj molding. Cov pellets yog maj mam yaj thaum lawv dhau los ntawm lub tog raj kheej, thiab thaum kawg raug yuam los ntawm lub nozzle rau hauv pwm.
Qhov thib ob, molding yog txheej txheem ntawm shaping cov yas molten rau hauv daim ntawv xav tau. Muaj ntau txoj hauv kev ntawm cov yas molding, xws li txhaj tshuaj molding, tshuab moulding, thiab extrusion molding. Kev txhaj tshuaj molding yog txoj kev siv ntau tshaj plaws, qhov twg cov yas molten yog txhaj rau hauv pwm nyob rau hauv siab thiab tuav nyob rau ntawd kom txog rau thaum nws txias thiab solidifies, noj nyob rau hauv lub puab pwm.
Thaum kawg, kev ua tiav tom qab yuav tsum tau tshem tawm cov yas ntawm cov pwm thiab lwm yam kev ua tiav tiav yuav tsum tau ua, xws li trimming lossis smoothing cov npoo. Cov khoom kawg yog tom qab ntawd npaj rau ntim thiab xa khoom.
Cov tshuab sib txawv thiab cov ntaub ntawv yas yog siv nyob ntawm cov khoom tshwj xeeb. Piv txwv li, high-density polyethylene (HDPE) feem ntau yog siv rau tshuab moulding, thaum acrylonitrile butadiene styrene (ABS) feem ntau yog siv rau kev txhaj tshuaj molding. Cov tshuab siv rau cov khoom siv yas tuaj yeem ua los ntawm cov tshuab me me rau kev ua qauv mus rau cov tshuab loj, siab ceev siv hauv ntau lawm.
Zuag qhia tag nrho, kev tsim cov khoom yas yog cov txheej txheem ua tau zoo thiab meej, tso cai rau kev tsim cov khoom zoo sai sai thiab tus nqi qis. Nws ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam thiab tseem yog ib feem tseem ceeb ntawm kev tsim khoom niaj hnub.
