Zotulutsa pulasitiki ndi zida zapakatikati pamakampani opanga mapulasitiki, omwe amagwiritsidwa ntchito kwambiri popanga zinthu zapulasitiki monga mapaipi, mbiri, mafilimu, ndi waya ndi kutsekemera kwa chingwe. Mfundo yawo yogwiritsira ntchito ndikusungunula zopangira pulasitiki zolimba (monga ma granules kapena ufa) kupyolera mu kutentha ndi kupanikizika kopangidwa ndi screw yozungulira, ndikuzitulutsa mosalekeza kuti zipange chinthu cha mawonekedwe enieni.
Ma extruder apulasitiki amakhala ndi zigawo zazikulu zitatu: makina otulutsa, makina oyendetsa, ndi makina otenthetsera ndi ozizira. Dongosolo la extrusion, lopangidwa ndi hopper, screw, ndi mbiya, ndiye pakatikati pa zida. Zopangira za pulasitiki zimalowa mu mbiya kuchokera ku hopper ndipo zimaperekedwa kutsogolo ndi zozungulira, pamene pulasitiki imasungunuka pang'onopang'ono ndi chipangizo chotenthetsera chomwe chili kunja kwa mbiya. The wononga kapangidwe mwachindunji zimakhudza plasticizing zotsatira ndi bwino kupanga. Mitundu yodziwika bwino ya screws imaphatikizapo pang'onopang'ono-kusintha, mwadzidzidzi-kusintha, ndi mitundu yolekanitsa, yoyenera kupangira zinthu zosiyanasiyana zamapulasitiki ndi zofunika pokonza. Dongosolo lagalimoto limapereka mphamvu yofunikira pakuzungulira kozungulira ndipo nthawi zambiri imakhala ndi mota, chochepetsera, ndi ma bearings, kuwonetsetsa kukhazikika kwa screw. Makina otenthetsera ndi ozizira amawongolera bwino kutentha kwa mbiya, kuwonetsetsa kuti pulasitiki isungunuke bwino ndikupewa kutenthedwa ndi kuwonongeka.
Zotulutsa pulasitiki zitha kukhala m'gulu limodzi-zikulukulu, mapasa-zikululukulu-zikululukulu, ndi -zikululukulu zambiri{2}}kutengera ndi ntchito yake. Zotulutsa -zimodzi, zomwe zimakhala zosavuta komanso zotsika mtengo, ndizoyenera kukonza-mapulasitiki acholinga. Ma Twin-zikuluzikulu zotulutsa, zokhala ndi kuchuluka kwake kosanganikirana, nthawi zambiri zimagwiritsidwa ntchito{8}}zolondola kwambiri monga kuphatikiza, kusintha, kudzaza, ndi kuphatikiza. Zambiri-zotulutsa zitsulo zimagwiritsidwa ntchito pokonza zida zapadera za polima. Kuphatikiza apo, ma extruder amakono nthawi zambiri amakhala ndi makina owongolera okha, omwe amathandizira kusintha kolondola kwa magawo monga kutentha, kupanikizika, ndi liwiro, kuwongolera magwiridwe antchito komanso mtundu wazinthu.
Zotulutsa pulasitiki zimagwira ntchito yofunika kwambiri pantchito yomanga, yamagalimoto, zamankhwala, ndi zonyamula katundu. Mwachitsanzo, PVC chitoliro extruders ntchito kutulutsa madzi ndi ngalande mapaipi, pamene kuwombedwa filimu extruder ntchito kupanga ma CD mafilimu chakudya. Chifukwa cha kuchuluka kwa kufunikira kwa chitetezo cha chilengedwe komanso kasungidwe ka mphamvu, kugwiritsa ntchito bwino mphamvu ndi kupulumutsa mphamvu-zokayikitsa zayamba kufala m'mafakitale, zomwe zikupangitsa kuti mapulasitiki apangidwe mwanzeru komanso olondola.
