Zotulutsira ma screw awiri zimagwiritsidwa ntchito kwambiri posintha ma polima, ndipo zingagwiritsidwenso ntchito potulutsa zinthu zopangidwa ndi ulusi. Makhalidwe ake odyetsera ndi abwino, ndipo ali ndi ntchito zabwino zosakaniza, kutulutsa mpweya, komanso kudziyeretsa kuposa chotulutsira ma screw chimodzi. Pogwiritsa ntchito mitundu yosiyanasiyana ya zinthu zotulutsira ma screw, chotulutsira ma screw awiri chokhala ndi ntchito yotulutsa utsi yopangidwa ngati zomangira chingagwiritsidwe ntchito m'mbali zotsatirazi.
- Kupanga kwa masterbatch
Kusakaniza kwa tinthu ta pulasitiki ndi zowonjezera ndiye gulu lalikulu. Zowonjezera zimaphatikizapo utoto, zodzaza ndi zowonjezera zogwira ntchito. Chotulutsira cha twin-screw ndiye chida chofunikira kwambiri pa mzere wopanga wa masterbatch, chomwe chimagwiritsidwa ntchito popanga homogenization, dispersion ndi kusakaniza zowonjezera mu polymer matrix.
- Kusintha kosakaniza
Perekani magwiridwe antchito abwino kwambiri osakaniza pakati pa matrix ndi zowonjezera, zodzaza. Ulusi wagalasi ndiye chinthu chofunikira kwambiri cholimbitsa, koma ulusi wina ukhozanso kuphatikizidwa ndi zonyamulira ma polima. Mwa kuwonjezera ulusi ndikuphatikiza ndi ma polima, zipangizo zomwe zimakhala ndi mphamvu zambiri komanso kukana kwakukulu zimatha kupezeka, ndipo nthawi yomweyo, kulemera ndi mtengo zimatha kuchepetsedwa.
- Utsi wotulutsa utsi
Chifukwa cha maukonde awiriwa, njira yodulira zinthu pamalo olumikizirana imasinthasintha mosalekeza mawonekedwe a pamwamba pa zinthuzo ndikuwonjezera mphamvu ya utsi, kotero kuti chotulutsira cha mapasa awiri chimagwira ntchito bwino kuposa chotulutsira cha single-screw chotha ntchito.
- Kutulutsa mwachindunji
Chotulutsira cha mapasa awiri chingaphatikizenso kusakaniza ndi kuumba kwa extrusion. Pogwiritsa ntchito mutu winawake ndi zida zoyenera pansi pa madzi, chingapange zinthu zomalizidwa bwino kwambiri, monga mafilimu, mbale, mapaipi, ndi zina zotero. Kutulutsa mwachindunji kungalepheretse njira zoziziritsira ndi kuzizira, kubwezeretsanso kutentha ndi kusungunula, ndipo zinthuzo sizimatenthedwa kwambiri komanso zimachepa. Njira yonseyi imatha kusunga mphamvu ndipo njirayo imatha kusinthidwa mosavuta.
