Kev txav ntawm cov ntaub ntawv nyob rau hauv extruder ntsia hlau tau muab faib ua peb ntu rau kev tshawb fawb, yog li cov qauv ntawm cov ntsia hlau feem ntau nqa tawm hauv ntu. Txij li thaum txhua ntu yog cov channel txuas ntxiv, hauv kev tsim khoom txuas ntxiv, tsuav nws tuaj yeem ua tau raws li qhov yuav tsum tau ua tiav, nws tsis tsim nyog faib cov ntsia hlau ua peb ntu. Qhov tseeb, qee cov screws tsuas muaj ob ntu, thiab qee yam tsis tshaj tawm. Piv txwv li, thaum muaj cov nylon ntxiv, cov khoom siv nrog zoo crystallinity, muaj tsuas yog cov ntu pub mis thiab homogenization. Lub hau ntswj General Extrusion Mos POLYVINYYL CLORIDE yas tuaj yeem siv tag nrho cov tshooj lus Compression tsis tau sib faib ua ntu kev pub mis thiab homogenization. Qhov segmentation ntawm cov ntsia hlau yog tau los ntawm kev paub dhau los thiab tsuas yog txiav txim siab los ntawm cov khoom ntawm cov khoom. Qhov ntev ntawm cov seem noj tau tuaj yeem yog los ntawm 0} rau 75% ntawm tag nrho ntev ntawm cov ntsia hlau. Feem ntau hais lus, nws yog qhov ntev tshaj plaws thaum extruding crystalline polymers, ua raws li cov amorphous polymers, thiab luv tshaj plaws rau cov mos amorphous polymers. Qhov ntev ntawm ntu compression feem ntau tus account rau 50% ntawm tag nrho cov ntev ntawm cov ntsia hlau, ntawm chav kawm, cov xim dub thiab cov mos-hau chloride yog cov zam. Thaum extruding polyethylene, qhov ntev ntawm homogenization seem yuav 20-25}}% ntawm tag nrho ntev. Txawm li cas los xij, rau qee cov ntaub ntawv cua sov (xws li polyvinyl chloride), cov khoom yuav tsum tsis txhob nyob ntev hauv ntu no, thiab ntu homogenization tuaj yeem raug rho tawm. Qhov ntev ntawm homogenization seem ntawm qee cov kev sib tw nrawm nrawm yog ntev li 50%.
