Txhaj tshuaj molding qhov yog ib qho ntawm cov khoom siv yas feem ntau hauv kev tsim khoom niaj hnub no. Cov tub ntxhais ntawm lawv cov lus dag ntau lawm hauv kev txhaj tshuaj moulding, uas cov khoom siv yas yog melted ntawm cov pwm kub thiab txhaj rau hauv cov pwm, qhov twg nws txias thiab ua rau cov qauv hloov. Hauv qab no qhia txog txheej txheem ntws, cov tsis tseem ceeb, thiab teeb meem ntau.
Cov txheej txheem muaj tsib kauj ruam: ua ntej, xws li pel, abs, thiab lwm yam) tau qhuav los tiv thaiv noo noo los ntawm kev cuam tshuam lawv cov xim. Tom ntej no, cov pellets tau muab tso rau kev txhaj tshuaj molding tshuab barrel thiab rhuab ntawm 180-300℃(nyob ntawm cov khoom siv) kom txog thaum lawv mus txog lub xeev txaus ntshai. Cov ntsia hlau tig thiab nias lub ntsej muag makt rau hauv lub kaw cov lus pwm, tswj hwm kom tiv thaiv shrinkage tsis meej. Lub kaw lus txias (feem ntau yog ib qho chaw tso dej ncig ua haujlwm) kom ua kom cov khoom lag luam tsis pub dhau 30-90 vib nas this. Thaum kawg, pwm tau qhib thiab ntiab tawm, ua tiav ib lub voj voog.
Tswj cov tsis tseem ceeb ncaj qha cuam tshuam tsis zoo: ① kub yuav tsum phim cov khoom siv khoom; Kev kub dhau heev tuaj yeem ua rau decomposition, thaum muaj kev kub ntau dhau tuaj yeem ua rau pwm tsis tau. Rushing siab (80-150 MPA) txiav txim siab ua kom nrawm thiab ntom. Lub sijhawm txias txias rau ntau dua 60% ntawm lub voj voog, ntsuas ntsuas kev ua haujlwm nrog kev pheej hmoo ntawm deformation. ④ Tsim pwm yog qhov tseem ceeb heev, xav tau kev ua kom muaj kev paub meej ntawm lub rooj vag qhov chaw, qhov cub rau qhov tob (feem ntau ntau dua lossis sib npaug nrog 3 degree).
Cov khoom tsis xws luag suav nrog Flash (los ntawm cov cim xoob (los ntawm tsis muaj kev tiv thaiv tsis txaus), thiab kev ntaus khaub thuas (los ntawm kev txias tsis huv). Cov tsis xws luag no tuaj yeem daws los ntawm kev kho cov qauv lossis ua kom zoo pwm qauv. Kev tsim tau zoo dua tseem yuav tsum tau ua kom haum rau cov pwm (xws li hloov pauv ntawm cov khoom siv) thiab cov khoom siv raw ua pretreatment (piv txwv li, kom muaj kev sib xyaw ua ke ntawm masterbatches).
Mastering cov hau kev no thiab cov ntsiab lus tuaj yeem txhim kho cov txiaj ntsig los ntawm kev txhaj tshuaj molding thiab lub zog yuav tsum muaj kev lag luam xws li kev lag luam thiab khoom siv hluav taws xob.
