Kev tsim cov txheej txheem ntawm PVC ua npuas ncauj khau khiab

Ib leeg ntawm PVC ua npuas ncauj khau khiab yog tsim los ntawm molding thiab foaming txheej txheem, lub luag haujlwm tseem ceeb yog raws li hauv qab no.
① Cov khoom xyaw kneading Ncuav cov khoom siv raw PVC rau hauv lub tshuab kneader, thiab tom qab ntawd ntxiv ntau yam khoom ntxiv rau cua sov thiab kneading. Cov cua kub cua kub siab yog li ntawm 0.29MPa, thiab cov khoom raug tso tawm tom qab kneading li 45 ~ 60 feeb.
②Plastication ntawm daim ntawv rub Lub kneaded sib tov yog xa mus rau ob-roller yas tov khoom rau plastication ntawm daim ntawv rub. Lub plastication kub yog tswj ntawm txog 130 degree.
③ Moulded blanks yog xuas nrig ntaus rau hauv daim ntawv raws li tus qauv (feem ntau duab plaub) kos tom qab mastication. Raws li tus tsim thiab xim xav tau los ntawm ib leeg, cov khoom ntawm ntau yam xim tuaj yeem sib phim, thiab tom qab ntawd cov khoom raug ntsuas raws li lub peev xwm ntawm pwm kab noj hniav. Qhov hnyav yuav tsum yog qhov tseeb dua los tiv thaiv kev dhau los yog tsis muaj cov khoom siv. Tom qab ntawd xa cov pwm nrog cov ntaub ntawv mus rau hauv lub tshuab kub xovxwm rau cua sov, plasticization, foaming, txias thiab shaping tom qab foaming, thiab ces demoulding kom tshem tawm cov plasticized dawb paug. Cov txheej txheem rau molding puas yog: molding plasticization kub 160 ~ 165 degree . Lub cua sov chav siab yog 0.686 ~ 0.784MPa, molding siab yog 4.9MPa, lub sij hawm molding yog 10 ~ 20min, qhov txias qhov chaw kub yog 50 degree, thiab lub sij hawm txias yog 20min.
④ Kev kho cua sov Lub hom phiaj ntawm kev kho cua sov yog ua kom sov ntxiv thiab ua npuas ncauj qhov khoob nyob rau hauv ib txwm siab kom tau ib daim ntawv ntawm cov khau khau. Ua kom nws ua npuas dej, thiab cov ntaub ntawv foamed ntawm cov khau khiab foamed hauv qab yog xa tawm ntawm chav ziab khaub ncaws thiab xa mus rau lub tsev rau khoom kom nres rau ib lub lim tiam ua ntej xa mus rau punched.
⑤ Kev sib tsoo thiab sib dhos: xuas nrig ntaus tawm cov ntaub ntawv ua npuas dej rau hauv cov qauv khau khiab raws li cov qauv tshwj xeeb thiab qhov ntev ntawm cov khau khiab, tom qab ntawd tho qhov, thiab sib sau ua ke nrog cov khau khiab pluaj kom tau cov khau khiab tiav.