1. Ua squeezed. Thaum nias, qhov kev taw qhia khiav ntawm cov hlau coincides nrog cov kev taw qhia ntawm tus convex transverse zog. Qhov zoo tshaj tawm yog muab faib ua ob hom: qhov khoom ib sab yog raug muab pov tseg thiab qhov hollow part yog raug ntaus. Cov txheej txheem zoo nkauj tuaj yeem tsim tau cov khoom thiab khoob me ntsis ntawm ntau daim duab, xws li cov xov tooj, txawb, cov tub thiab cov cartridges.
2. Rov extrusion. Thaum squeezed, khiav ntawm cov kub shavings yog rov qab rau txoj kev coj ntawm cov punch. Txoj kev rov qab sab nrauv tuaj yeem ua qhov khoom ua qauv ntawm ntau hom kab kev sib tshuam, xws li lub ntsuas cua thiab lub tes tsho sib npaug ntawm kev sib koom tes.
3. Ua zoo sib xws. Thaum nkag mus, ib feem ntawm cov hlau ntws hauv qhov kev taw qhia raws li cov punch, hos lwm qhov ntawm kub khiav kev taw qhia yog txawv rau kev taw qhia ntawm cov punch. Tus txheej txheem rhuav tshem tawm tau tsim ua ob chav khob lossis khob. Qhov chaw thiab ncej seem.