Makina opangira jakisoni ndi gawo lofunikira pamakina, lomwe limagwiritsidwa ntchito kwambiri kunyamula, kuphatikizira, kusungunula, komanso kukakamiza zida zapulasitiki. Kapangidwe kake ndi magwiridwe antchito zimakhudza mwachindunji kugwirira ntchito kwa plasticizing ndi mtundu wazinthu.
Thupi la screw lili ndi gawo lodyetsa, gawo loponderezana, ndi gawo la homogenization. Gawo lodyetsa limayang'anira kutentha ndi kutumiza zinthu zolimba; chigawo choponderezedwa chimakwaniritsa kusungunuka, kusakaniza, ndi kutuluka; ndi gawo la homogenization limatsimikizira kufanana kwa kutentha kwasungunuka ndi kukhazikika kwakuyenda. Kutengera kusiyana kwa zinthu zapulasitiki, zomangira zitha kugawidwa m'magulu atatu: mtundu wa gradient (woyenera kutentha-zinthu zomva kutentha monga PVC), mtundu wodzidzimutsa (woyenera polyolefins), ndi-mtundu wa cholinga. Kusiyana kwakukulu kuli mu kutalika ndi kumeta ubweya wa mphamvu ya gawo la psinjika. Magawo ofunikira amaphatikiza ma diameter, chiŵerengero cha mawonekedwe, ndi chiŵerengero cha kuponderezana, zomwe ziyenera kufananizidwa ndi katundu wakuthupi kuti muwonjezere zotsatira za plasticizing. Zipangizo zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala zokwera-zotentha komanso zosavala-zosagwira ntchito monga 38CrMoAla alloy ndi tungsten carbide nickel{10}based alloy. Mukagwiritsidwa ntchito, njira yofananira yotenthetsera ndikuyeretsa nthawi zonse ndikofunikira kuti mupewe kutsetsereka kapena kuwonongeka kwamakina.
