Kev txheeb xyuas thiab ua ntej-kev kho mob: Ua ntej, cov khoom pov tseg yuav tsum tau muab cais tawm kom tshem tawm cov impurities xws li hlau thiab ntawv. Cov sorted plastics ces yuav tsum tau ntxuav kom tshem tawm cov av thiab residue. Kev ntxuav feem ntau yog ua nrog dej los yog nrog ntxiv ntawm tus neeg saib xyuas tu. Cov plastics ntxuav ces yuav tsum tau qhuav.
Crushing thiab Sib Tsoo: Cov yas ntxuav thiab qhuav yog crushed siv lub crusher los yog grinder txiav rau hauv me me los yog hmoov rau tom qab melting. Thaum crushing, particle loj yuav tsum tau ua tib zoo tswj, feem ntau 3-5mm.
Melting thiab Lim: Cov yas crushed nkag mus rau hauv cov khoom siv melting (xws li extruder lossis cov khoom siv sab hauv) thiab yaj mus rau hauv cov kua hauv lub xeev kub. Lub melting kub nws txawv nyob ntawm seb hom yas, feem ntau ntawm 160-300 degree. Stabilizers thiab plasticizers yog ntxiv thaum lub sij hawm melting txheej txheem los txhim kho cov khoom yas. Cov molten plastics ces yuav tsum tau lim kom tshem tawm impurities thiab xyuas kom meej particle purity.
Granulation: Cov yas lim molten yog granulated siv lub granulator. Cov txheej txheem granulation feem ntau suav nrog dej-cooled pelletizing thiab cua-cooled pelletizing. Dej-cooled pelletizing yog tsim rau siab- cov yas yas, nrog lub pellet txoj kab uas hla feem ntau yog 2-4 hli; huab cua-cooled pelletizing yog tsim rau cov yas uas tsis muaj qhov kub thiab txias, nrog lub pellet txoj kab uas hla feem ntau yog 1-3 hli. Cov pellets tom qab pelleting yuav tsum tau txias thiab ziab.
Ntim thiab Cia: Cov pellets qhuav tau ntim nrog lub tshuab ntim khoom, feem ntau hauv 25 kg hnab lossis ton hnab. Ntim cov pellets yuav tsum tau muab cia rau hauv qhov chaw qhuav, zoo- qhov chaw cua, tsis txhob ya raws thiab kis kab mob.
