Dab tsi yog cov txheej txheem txhaj tshuaj molding ntawm PC yas?

PC yas feem ntau hu ua polycarbonate, uas feem ntau hu ua mos txwv nplaum nplaum vim nws cov khoom siv zoo heev. PC yas muaj cov yam ntxwv ntawm cov neeg kho tshuab siab, qhov kub thiab txias, kev ua haujlwm zoo hluav taws xob (tab sis tsis hloov pauv kev ua haujlwm ntawm arc), qhov zoo ntawm qhov ruaj khov thiab pob tshab.
Nws yog dav siv hauv cov khoom siv hluav taws xob, cov khoom siv hluav taws xob hluav taws xob, thiab cov qauv ntawm cov khoom siv hluav taws xob. Muaj ntau yam khoom hloov kho rau PC, xws li iav fiber ntau, ntxhia muab tub lim, tshuaj nplaim taws retardant thiab lwm yam yas. PC plastics muaj cov dej tsis zoo thiab kev ua haujlwm siab, yog li kev ua haujlwm ntawm ntau qib ntawm cov ntaub ntawv hloov kho yuav tsum muaj cov txheej txheem tshwj xeeb yas txhaj tshuaj.
1. Kev kho cov yas
Kev nqus dej ntawm PC yog qhov loj, yog li nws yuav tsum tau preheated thiab qhuav ua ntej ua. Lub PC ntshiab yog qhuav ntawm 120 degree, thiab hloov kho PC feem ntau qhuav ntawm 110 degree rau ntau tshaj 4 teev. Lub sij hawm ziab yuav tsum tsis pub tshaj 10 teev. Feem ntau, txoj kev sib txawv ntawm huab cua extrusion tuaj yeem siv los txiav txim seb qhov ziab puas txaus.
Qhov kev faib ua feem ntawm cov khoom siv rov ua dua tuaj yeem ncav cuag 20 feem pua. Qee zaum, 100 feem pua ​​​​cov ntaub ntawv rov siv dua tuaj yeem siv tau, thiab tus nqi tiag tiag nyob ntawm qhov kev xav tau ntawm cov khoom. Cov khoom siv rov ua dua tsis tuaj yeem sib xyaw nrog cov xim sib txawv masterbatches tib lub sijhawm, txwv tsis pub cov khoom ntawm cov khoom tiav yuav raug puas tsuaj loj.
2. Kev xaiv ntawm kev txhaj tshuaj molding tshuab
Vim yog tus nqi thiab lwm yam laj thawj, cov khoom siv PC tam sim no siv cov ntaub ntawv hloov kho ntau dua, tshwj xeeb tshaj yog cov khoom siv hluav taws xob, thiab tseem yuav tsum tau ua kom muaj hluav taws kub. Thaum cov nplaim hluav taws kub-retardant PC thiab lwm yam khoom siv yas yog molded, cov kev cai rau cov yas txhaj tshuaj molding tshuab yog zoo sib tov thiab corrosion kuj. Pa yas yas ntsia hlau yog qhov nyuaj rau kev ua tiav, yog li nws yuav tsum tau piav qhia ua ntej thaum yuav khoom. Ramada muaj tshwj xeeb PC ntsia hlau rau cov neeg siv khoom xaiv.
3. Pwm thiab rooj vag tsim
Cov pwm kub kub yog 80-100 degree , thiab qhov kub nrog iav fiber ntau yog 100-130 degree . Rau cov khoom me me, rab koob zoo li lub rooj vag tuaj yeem siv tau. Lub qhov rooj qhov tob yuav tsum yog 70 feem pua ​​ntawm qhov tuab tshaj plaws. Lwm cov rooj vag yog annular thiab rectangular.
Qhov loj ntawm lub rooj vag, qhov zoo dua, kom txo tau qhov tsis xws luag tshwm sim los ntawm kev txiav cov yas ntau dhau. Qhov tob ntawm qhov tso pa tawm yuav tsum tsawg dua 0.03-0.06mm, thiab qhov ntws channel yuav tsum luv thiab puag ncig li sai tau. Txoj kab nqes demoulding feem ntau yog li 30 '- 1.
4. Melt kub
Qhov ntsuas kub ua haujlwm tuaj yeem txiav txim siab los ntawm txoj kev txhaj tshuaj. Feem ntau, qhov ua haujlwm kub ntawm PC yog 270-320 degree , thiab ntawm qee qhov hloov kho lossis qis molecular hnyav PC yog 230-270 degree .
5. Tus nqi txhaj tshuaj
Nws yog ib qho uas siv cov kev txhaj tshuaj nrawm nrawm rau molding, xws li hluav taws xob hloov qhov chaw. Nws yog feem ntau qeeb → ceev prototyping.
6. Rov qab siab
Lub siab rov qab ntawm li 10 bar tuaj yeem txo qis kom tsim nyog yam tsis muaj cua cim thiab xim sib xyaw.
7. Lub sijhawm kaw
Yog tias lub sijhawm nyob ntawm qhov kub siab ntev ntev, cov khoom yuav degrade, tso CO2 thiab tig daj. Tsis txhob siv LDPE, POM, ABS lossis PA los ntxuav lub thoob. Siv PS ntxuav.
8. Ceev faj
Qee lub PCs hloov kho tau ua rau cov npuas dej tsaus nti vim muaj ntau lub sij hawm rov qab los (qis dua molecular hnyav) los yog tsis sib xws ntawm ntau yam khoom.