The twin-screw extruder y’emu ku zifulumya ebirungo ebingi (multi-screw extruders). Mu ppipa y’ekifulumya eky’ekika kya twin-screw ekyakulaakulanyizibwa ku musingi gw’ekifulumya eky’ekika kya single, sikulaapu bbiri ziteekebwa ku mabbali, kale kiyitibwa ekifulumya eky’ekika kya twin-screw. Ekifulumya amazzi agabiri (twin-screw extruder) kirimu enkola y’okuliisa abantu, enkola y’okufulumya amazzi, enkola y’okubugumya, enkola y’okutambuza amasannyalaze, enkola y’okusala ekyukakyuka n’enkola y’okufuga. Ekintu kino kiweebwa emmere, era ekipipa kikolebwako ebbugumu eringi, puleesa eya waggulu n’okusala waggulu okufuuwa ekintu okutuuka ku mutindo gw’omutindo ogweyagaza ng’embeera y’ebitundu by’omubiri.
Ebikulu ebikwata ku kifulumya eky’amasasi abiri (twin-screw extruder):
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3. Okusinziira ku nkola y’okufuga ebbugumu mu ngeri ey’otoma, okufuga ebbugumu kusinga kutegeerekeka era ebipimo biba bituufu nnyo.
4. Enkola y’okusiiga okukakasa nti okutambuza ebyuma kulina obulamu obuwanvu.
5. Sikulaapu erina omulimu ogw’okweyonja, tekyetaagisa kukuŋŋaanya kuyonja sikulaapu .
6. Omugerageranyo gwa sikulaapu n’obuwanvu n’obuwanvu ogw’enjawulo guyinza okutuukiriza enkola ez’enjawulo ez’okufulumya.