Cov txheej txheem kub-extrusion muaj nyob rau hauv ib daim ntawm cov hlau, rhuab rau forging kub, nyob rau hauv ib tug chamber hu ua "container" muaj ib tug tuag ntawm ib kawg nrog ib tug qhib ntawm cov duab ntawm qhov xav tau tiav seem, thiab thov siab rau cov hlau. dhau ntawm qhov kawg ntawm lub thawv. Cov hlau raug yuam los ntawm qhov qhib, cov duab uas nws xav tau nyob rau hauv ntu ntu, raws li cov hlau ntws los ntawm plastically nyob rau hauv lub zog loj siv.
Teessiv cov khoom siv raw nrog txoj kab uas hla loj dua li cov khoom tiav, cov ceg hluav taws xob yog extruded los ntawm cov yeeb nkab thaum lub cev tseem ceeb raug nias. Lub qhov hluav taws xob phab ntsa tuab kuj tuaj yeem hloov kho raws li xav tau. Siv rau tees nrog loj diameters, hnyav phab ntsa thickness thiab / los yog cov khoom tshwj xeeb nrog nyuaj workability uas tsis tuaj yeem tsim siv txoj kev hydraulic bulge.