Iyo inopisa-extrusion process inosanganisira kuvharira chidimbu chesimbi, chinopisa kusvika pakugadzira tembiricha, mukamuri inonzi "mudziyo" ine dhiri kune imwe magumo nekuvhurwa kwechimiro chechikamu chinodiwa chakapedzwa, uye kushandisa kumanikidza kusimbi. kuburikidza nekumucheto kwegaba.Iyo simbi inomanikidzwa kuburikidza nekuvhura, chimiro chayo inotora mumuchinjikwa-chikamu, sezvo simbi inoyerera plastiki pasi pematambudziko makuru anoshandiswa.
Teesuchishandisa mbishi ine dhayamita yakakura kupfuura chigadzirwa chakapedzwa, chinobuda chebazi chinoburitswa kubva mupombi uku muviri mukuru uchitsikirirwa.Iyo yekubuda kwemadziro ukobvu inogonawo kugadziriswa sezvinodiwa.Inoshandiswa kune ma tee ane madhayamita akakura, ukobvu hwemadziro anorema uye/kana zvinhu zvakakosha zvine basa rakaoma risingagone kugadzirwa uchishandisa iyo hydraulic bulge method.