Cov kev hloov pauv dab tsi tshwm sim rau cov khoom yas thaum lub sij hawm extrusion txheej txheem?

Lub tshuab extrusion heats cov khoom yas kom muaj dej khov. Nyob rau hauv lub siab, cov yas yog yuam los ntawm ib tug tuag ntawm ib tug tshwj xeeb zoo, uas ua rau ib tug nruam lub cev nrog ib tug ntoo khaub lig-section zoo li cov duab ntawm cov tuag. Tom qab ntawd, cov yas tau ua kom txias, hloov mus los ntawm cov kua dej ntws mus rau lub xeev elastomeric nrog qee qhov geometry thiab qhov ntev. Thaum kawg, nws txias thiab teeb tsa rau hauv lub xeev iav, ua rau cov khoom xav tau (lub xeev iav - viscous flow xeev - elastomeric xeev - glassy xeev). Nyob rau hauv layman cov ntsiab lus, cov txheej txheem no yuav hloov los ntawm granular xeev - sib tov ntawm granular thiab melted hais - melted hais - cov khoom tiav.