Xov Xwm - Lub Tshuab Yas Extrusion Ua Haujlwm Li Cas?

Yas extrusion, tseem hu ua plasticating extrusion, yog ib tug tas mus li ntim ntau lawm txheej txheem nyob rau hauv uas ib tug thermoplastic cov ntaub ntawv - nyob rau hauv ib daim ntawv ntawm hmoov, pellets los yog granulates - yog homogeneously yaj thiab ces raug yuam tawm ntawm lub shaping tuag los ntawm lub siab. Nyob rau hauv cov ntsia hlau extrusion, lub siab los ntawm cov ntsia hlau tig tawm tsam lub chim phab ntsa. Raws li cov yas yaj dhau los ntawm qhov tuag, nws tau txais qhov tuag qhov zoo thiab tawm ntawm extruder. Cov khoom extruded yog hu ua extrudate.

Ib tug raug extruder muaj plaub cheeb tsam:

Pub Zone

Nyob rau hauv cheeb tsam no, lub davhlau qhov tob yog tas li. Qhov kev ncua deb ntawm txoj kab uas hla loj nyob rau sab saum toj ntawm lub davhlau thiab me me txoj kab uas hla ntawm cov ntsia hlau nyob rau hauv qab ntawm lub davhlau yog lub davhlau qhov tob.

Transition Zone los yog Compression Zone

Qhov dav dav dav pib txo qis hauv cheeb tsam no. Nyob rau hauv qhov tseeb, cov khoom siv thermoplastic yog compressed thiab pib plasticize.

Mix Hindiaz

Nyob rau hauv cheeb tsam no, lub dav hlau qhov tob yog ib zaug ntxiv. Txhawm rau kom cov khoom tiav melted thiab homogeneously tov, ib qho kev sib xyaw tshwj xeeb yuav nyob rau hauv qhov chaw.

Kev ntsuas Zone

Thaj chaw no muaj qhov dav dav me me dua li hauv cheeb tsam sib xyaw tab sis tseem nyob tas li. Tsis tas li ntawd, lub siab thawb lub yaj los ntawm qhov shaping tuag hauv cheeb tsam no.

Ntawm lwm cov ntawv, lub melting ntawm polymer sib tov yog tshwm sim los ntawm peb yam tseem ceeb:

Kub Hloov

Thaum tshav kub kub hloov yog lub zog xa tawm ntawm lub tshuab extruder mus rau lub taub hau extruder. Tsis tas li ntawd, lub polymer melting yog cuam tshuam los ntawm cov ntsia hlau profile thiab lub sijhawm nyob.