Kuchokera pakupanga zinthu zapulasitiki, nkhungu yowombeza ya extrusion imagwiritsidwa ntchito kutulutsa mpweya, kuziziritsa, ndi kupanga parison, pomwe imapatsa wopanga mawonekedwe ndi kukula kwake.The extrusion kuwomba nkhungu ali ndi makhalidwe otsatirawa.

(1) Extrusion nkhonya akamaumba zisamere pachakudya, kupatula nkhungu wapadera monga mankhwala awiri-mipanda, kokha ndi nkhungu wamkazi ndipo palibe nkhungu mwamuna.Poyerekeza ndi nkhungu zomwe zimagwiritsidwa ntchito muzinthu zina zapulasitiki, mapangidwe ake ndi osavuta.

(2) Popeza nkhunguyo ilibe nkhungu yamphongo, imatha kudzaza zinthu zapulasitiki zokhala ndi zozama komanso mawonekedwe ovuta.

(3) Mphuno ya nkhungu ilibe njira yosungunuka yosungunuka, ndipo nkhungu imatsekedwa pambuyo poti parison ilowa mu nkhungu.Kusungunuka kwa parison kumadalira kufalikira kwa mpweya woponderezedwa kuti mudzaze patsekeke.

(4) Poyerekeza ndi nkhungu jakisoni, extrusion kuwomba nkhungu patsekeke amanyamula kutsika kupanikizika.Zida zopepuka zitha kugwiritsidwa ntchito popanga nkhungu, ndipo pabowo sikufunika kuumitsa.Mtengo wa nkhungu ndi wochepa.

(5) Kupanga kosalekeza, kuchita bwino kwambiri, komanso zinthu zazitali zitha kupangidwa;

(6) Zogulitsa zomwe zili ndi magawo osiyanasiyana zimatha kupangidwa;

(7) Kuphatikiza ndi zida zina, imatha kumaliza kukonzanso kwathunthu kwa njira zosiyanasiyana.Mwachitsanzo, makina ojambulira ndi makina opangira kalendala amagwirizana kuti apange filimuyo;

(8) The extruder mutu ndi pelletizer akhoza kugwirizana kuti pelletize;

(9) Malowa ndi aang’ono ndipo malo opangirako ndi aukhondo.