Cov phooj ywg uas tsis to taub txog pwm tuaj yeem yooj yim to taub los ntawm cov pwm yas thiab cov yas pwm. Qhov kev xav zoo sib xws. Qhov tseeb, qhov sib txawv ntawm cov roj hmab thiab yas yog qhov loj heev. Txawm hais tias nws yog cov ntaub ntawv raw, kev ua cov cuab yeej siv lossis kev txhaj tshuaj molding, muaj qhov sib txawv kiag li. Muaj ntau yam hauv cov yas pwm. Qhov thib ib yog tias lawv cov khoom siv raw sib txawv, thiab qhov thib ob cov khoom siv uas lawv siv yog qhov txawv ntawm txoj kev lawv ua, thiab tom qab ntawd cov txheej txheem molding txawv. Cov hauv qab no yog cov lus qhia ntxaws ntxiv rau qhov sib txawv ntawm cov pwm yas thiab cov yas pwm.
Qhov sib txawv ntawm cov pwm yas thiab cov pwm yas yog thawj zaug ntawm txhua yam khoom siv ua ntej. Qhov no tuaj yeem pom ntawm lawv cov npe. Cov plastics feem ntau xa mus rau PE, PP, PVC, PC thiab lwm yam ntaub ntawv. Cov no yog cov feem ntau ntsib hauv peb lub neej. Cov roj hmab feem ntau hais txog cov roj hmab ntuj thiab cov roj hmab hluavtaws, uas yog qhov tseem ceeb ntawm lawv.
Qhov sib txawv ntawm cov pwm yas thiab cov yas pwm yog ntxiv rau cov khoom siv raw, khoom siv thiab cov txheej txheem ua. Cov roj hmab tuaj pwm yog feem ntau kub-qhuav compression pwm. Thaum lub sijhawm ua haujlwm, cov roj hmab tso rau hauv kab noj hniav ntawm cov roj hmab pwm. Tom qab cov pwm tag lawm, qhov pwm tso rau hauv xovxwm kub, kub, nias thiab kom sov, thiab thaum kawg tshem tawm pwm, qhib lub pwm thiab coj tawm cov khoom lag luam. Cov yas pwm feem ntau txhaj tshuaj pwm. Cov txheej txheem yas hlau txhaj tshuaj txhaj rau hauv cov pwm kab noj hniav. Tom qab cov ntaub ntawv raw tau txias thiab ua kom khov rau hauv cov kab noj hniav pwm, lub pwm qhib kom qhib ntawm cov khoom tiav.
Thaum kawg, muaj qhov sib txawv hauv cov txheej txheem molding. Rau cov pwm roj hmab, cov khoom siv roj hmab yog vulcanized thiab tsau nyob rau hauv qhov ruaj ruaj thiab qhov txwv ntawm cov pwm kab noj hniav, yog li cov duab ntawm cov khoom tiav ua tiav cov duab ntawm cov pwm kab noj hniav. Tsuav tus qauv tsim qauv shrinkage tau raug, nws tuaj yeem tsim nyog. Cov khoom lag luam molded. Lub ntsej muag ib ntu ntawm cov pwm yas muaj qhov sib txawv ntawm qhov kawg ntawm cov ntu ntawm cov khoom siv roj hmab tau tom qab txhaj tshuaj, lossis txawm tias txawv heev. Qhov laj thawj yog tias qhov vulcanization ntawm cov roj hmab extruded cov khoom tiav rau ntawm kev qhib microwave (lossis lwm txoj kev vulcanization) vulcanization ntau lawm kab Kev txhaj tshuaj pwm yog tsim los ntawm kev txhaj cov yas rau hauv lub pwm thiab txias rau nws.
