Nyob rau hauv cov txheej txheem ntawm kev hloov pauv ntsuab thiab kev siv tau zoo hauv kev lag luam plastics, cov yas granulator, uas yog ib qho tseem ceeb ntawm cov khoom siv txuas cov khib nyiab yas thiab cov khoom siv rov ua dua tshiab, tab tom nthuav qhia nws cov txiaj ntsig thev naus laus zis thiab kev lag luam tseem ceeb. Nws ua cov khoom pov tseg rov ua dua tshiab rau hauv cov granules los ntawm kev siv lub cev lossis tshuaj lom neeg, tsis yog tsuas yog txo qhov kev cia siab ntawm cov yas yas ntawm cov khoom siv roj av xwb, tab sis kuj yog ib qho ntawm cov khoom tseem ceeb ntawm cov cuab yeej tsav kev loj hlob ntawm kev lag luam ncig.
Lub luag haujlwm tseem ceeb ntawm cov yas granulator yog nyob rau hauv "reshaping" pov tseg plastics. Nws txoj hauv kev ua haujlwm tuaj yeem raug suav hais tias "sib tsoo- melting-plasticizing-granulation": Ua ntej, cov khoom siv khib nyiab sib xyaw (xws li cov yeeb yaj kiab, lub raj mis flakes, txhaj tshuaj molding scraps, thiab lwm yam) tau ua tiav rau hauv cov khoom tsis sib xws los ntawm lub crusher; Tom qab ntawd, cov khoom tawg yog melted rau hauv ib qho viscous yaj nyob rau hauv cov ntsia hlau extrusion los ntawm lub tshuab cua sov, thaum lub sij hawm impurities raug cais los ntawm ib tug pom system; Thaum kawg, cov yaj yog extruded los ntawm ib tug tuag thiab txiav mus rau hauv standard granules nrog ib txoj kab uas hla ntawm 2-5 mm los ntawm ib tug high-ceev rotating cutter. Cov txheej txheem no khaws cov khoom qub polymer ntawm cov yas thaum txhim kho kev hloov pauv rau kev ua haujlwm tom ntej los ntawm homogenization.
Los ntawm kev xav txog kev hloov pauv thev naus laus zis, niaj hnub yas pelletizers tau tawg los ntawm kev txwv ntawm cov khoom siv ib txwm muaj. Rau cov khoom pov tseg uas muaj kuab paug thiab rov ua dua tshiab (xws li cov yeeb yaj kiab sib xyaw thiab ntoo khaub lig- cov ntaub ntawv sib txuas), qee cov qauv sib xyaw ua ke ob lub qauv -theem tso pa tawm, tshem tawm cov pa tsis zoo thiab qis - molecular- hnyav cov khoom los ntawm cov yaj. Daim ntawv thov ntawm kev tswj xyuas qhov kub thiab txias ua tiav qhov kev tswj qhov kub thiab txias hauv ± 1 degree, tiv thaiv cov khoom degradation los ntawm lub zos overheating. Modular tsim txhawb kev hloov ceev ntawm cov ntsia hlau cov khoom, yoog raws cov kev xav tau ntawm cov khoom sib txawv xws li PE, PP, thiab PVC. Cov kev tsim kho tshiab no ua rau txhim kho kev ua tau zoo thiab cov txiaj ntsig ntawm cov cuab yeej, nrog rau ib chav tsev ua tiav ib teev muaj peev xwm ntawm 500-2000 kg thiab kev siv hluav taws xob txo qis dua 30% piv rau cov qauv ua ntej.
Tam sim no, nrog kev tob zuj zus ntawm kev txwv txiav yas thoob ntiaj teb thiab kev nthuav dav ntawm cov ntaub ntawv yas rov ua dua tshiab (xws li ntim khoom, cov khoom siv hauv tsev, thiab cov khoom siv tsheb), kev lag luam xav tau rau cov yas pelletizers tseem nce ntxiv. Lawv tsis yog tsuas yog "hub" rau kev siv cov khoom siv pov tseg ntawm cov yas pov tseg xwb tab sis kuj yog qhov taw qhia tseem ceeb rau kev ntsuas qhov qis - qib carbon ntawm kev lag luam plastics. Nyob rau hauv lub neej yav tom ntej, nrog rau kev koom ua ke ntxiv ntawm cov ntse thiab qis - thev naus laus zis, cov yas pelletizers yuav ua lub luag haujlwm hloov tsis tau hauv kev txhawb nqa kev txhim kho ntawm kev lag luam zoo dua thiab huv dua rau cov yas.