Txhaj tshuaj molding tej yam kev mob ntawm PET cosmetic hub hub

1. Qhov kub thiab txias. Lub molding kub ntau ntawm PET yog nqaim, thiab qhov kub thiab txias yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom. Yog tias qhov kub thiab txias qis dhau, cov plasticization tsis zoo, ua rau muaj kev puas tsuaj xws li kev nyuaj siab thiab tsis muaj cov khoom siv; ntawm qhov tsis sib xws, yog tias qhov kub thiab txias dhau lawm, nws yuav ua rau cov ntug dej ntws tawm, dej ntws ntawm lub nozzle, darkening ntawm cov xim, txo cov neeg kho tshuab lub zog, thiab txawm degradation. Feem ntau, lub chim kub tswj ntawm 240 ~ 280 degree, thiab lub chim kub ntawm iav fiber reinforced PET yog 250 ~ 290 degree, tsis tshaj 300 degree. Lub nozzle kub feem ntau yog 10 ~ 20 degree qis dua lub chim kub.

2. Pwm kub. Cov pwm kub ncaj qha cuam tshuam rau qhov txias txias thiab crystallinity ntawm yaj. Qhov sib txawv crystallinity txhais tau hais tias cov khoom yas sib txawv. Feem ntau, pwm kub yog tswj ntawm 100 ~ 140 degree. Thaum molding nyias-walled yas qhov chaw, nws tuaj yeem siv tus nqi me me; thaum molding tuab-walled yas qhov chaw, nws tuaj yeem ua tus nqi loj.

3. Kev txhaj tshuaj siab. PET yaj muaj fluidity zoo thiab yooj yim rau kev tsim. Feem ntau, nruab nrab siab yog siv, thiab lub siab yog 80 ~ 140MPa. Kev txhaj tshuaj siab ntawm iav fiber reinforced PET yog 90 ~ 150MPa. Kev txiav txim siab ntawm kev txhaj tshuaj yuav tsum coj mus rau hauv tus account lub viscosity, hom thiab kom muaj nuj nqis ntawm PET.