1, txheej txheem yas
Txij li cov PET macromolecule muaj cov pab pawg lipid thiab muaj qee qhov hydrophilicity, pellet yog rhiab rau dej ntawm qhov kub. Thaum cov dej noo ntsiab lus siab dhau qhov txwv, qhov hnyav ntawm molecular ntawm tus tsiaj PET poob qis thaum lub sij hawm ua, thiab cov khoom lag luam yog xim thiab nkig. Hauv qhov no, cov khoom yuav tsum tau muab ziab ua ntej kev ua, thiab lub sijhawm ua kom qhuav yog li 150 ° C, ntau dua 4 teev, feem ntau 170 ° C, 3-4 teev. Kev siv cua ya tuaj yeem siv los xyuas kom meej tias cov khoom siv yog kom qhuav.
2, txhaj tshuaj molding tshuab xaiv
Txij li PET muaj lub sijhawm ruaj khov tom qab melting qhov taw tes thiab lub siab tawg, nws yog qhov yuav tsum tau siv cov txheej txheem txhaj tshuaj nrog ntau qhov ntsuas kub thiab tsis tshua muaj kev tiv thaiv tus kheej kub thaum lub sijhawm plasticization, thiab qhov hnyav ntawm qhov khoom tsis tuaj yeem tsawg dua dua li lub tshuab txhaj tshuaj. 2/3. Raws li cov kev xav tau no, Ramada tau tsim kho me me thiab nruab nrab series ntawm PET yas tshuab hauv xyoo tsis ntev los no. Lub zog clamping raug xaiv tau ntau dua 6300t / m2.
3, pwm thiab rooj vag tsim
PET preforms feem ntau yog tsim los ntawm kub khiav pwm, ntawm cov pwm thiab txhaj tshuaj moulding tshuab template. Yuav tsum muaj cov kab hluav taws xob thaiv, qhov tuab ntawm uas yog txog 12 hli, thiab lub rwb thaiv tsev txheej yuav tsum muaj peev xwm tiv taus qhov kub siab. Cov pa nkev yuav tsum muaj qhov tsis txaus kom tsis txhob muaj qhov kub ntxhov hauv zos lossis chipping, tab sis qhov tob ntawm lub qhov tso pa tawm yuav tsum tsis pub tshaj 0.03mm, txwv tsis pub nws yuav yooj yim tsim teeb nyem.
4, lub tshav kub yaj
Nws tuaj yeem ntsuas los ntawm cua-rau-cua txoj kev. Txog 270 thiab 295 ° C, txhim kho qib GF-PET tuaj yeem tsim tau 290-315 ° C thiab lwm yam.
5, daim ntawv. Tua ceev
Cov Lus Cim Dav Dav. Cov phom sij yog qhov ceev, uas tiv thaiv kom tsis txhob muaj qhov ua ntej thaum txhaj tshuaj. Tab sis nrawm dhau, qhov siab shear nqi ua rau cov khoom nkig. Qhov kev txhaj tshuaj no feem ntau yog ua tiav hauv 4 vib nas this.
6, rov qab siab
Qhov qis dua zoo dua, yog li kom tsis hnav. Feem ntau tsis tshaj 100bar. Feem ntau tsis tas yuav siv.
7, nyob rau lub sijhawm
Tsis txhob siv lub sijhawm nyob hauv tsev ntau dhau los tiv thaiv kev hnyav molecular phaus. Sim ua kom tsis txhob kub siab tshaj 300 ° C. Yog tias kaw no tsawg dua 15 feeb. Tsuas yog xav ua kom cua-tawg; yog tias ntev dua 15 feeb, ntxuav nws nrog viscosity PE thiab txo qhov kub ntawm lub thoob rau PE qhov kub kom txog thaum nws rov qhib dua.
8. Ceev faj
Yog tias pwm kub tsis tuaj yeem tswj tau lossis cov ntsuas kub tsis zoo tswj tsis tau, nws yog qhov yooj yim los tsim "huab dawb" thiab tsis yooj yim. Cov pwm kub thiab qis qis thiab tsis sib thooj, qhov ua kom txias yog nrawm, thiab cov crystallization tsawg dua, cov khoom lag luam yog pob tshab.