Cov ntsia hlau extruder ntawm lub tshuab cua tshuab extrusion tau muab faib ua peb ntu: ntu pub mis, ntu melting, thiab seem homogenization.
Thaum kawg ntawm ntu pub mis, ua ntej nkag mus rau hauv seem melting, raws li kev xav ntawm melting, nws qhov kub thiab txias yuav tsum yog qhov kub thiab txias. Cov viscous ntws kub ntawm ntau yam tshuab cua tshuab yog raws li nram no: PP: 164-175 degree, PE: 105-135 degree, PA: 195-210 degree.
1. Kev Siv Cov Khoom Siv Kub Kub Ntawm qhov nkag ntawm qhov chaw pub mis, qhov kub qis dua yog qhov tsim nyog los tiv thaiv cov resin los ntawm clogging qhov chaw nres nkoj pub. Tsis tas li ntawd, raws li cov resin txuas ntxiv mus rau hauv ntu pub mis, huab cua yuav tsum raug tshem tawm ntawm qhov chaw noj mov. Nyob ntawm cov khoom siv, txawm hais tias qhov chaw nres nkoj pub tsis yog hluav taws xob, cua sov tau xa mus los ntawm lub thoob, thiab qhov chaw pub khoom noj yog kwv yees li 50-90 degrees Celsius. Yog li, qhov ntsuas kub ntawm ntu pub mis yog txiav txim siab. Nrog rau qhov kub thiab txias ntawm 50-90 degrees Celsius thiab qhov kawg kub sib npaug rau lub melting point los yog viscous flow kub, ib tug linear kub nce nyob rau hauv seem no.
2. Melting Section Temperature Requirements: Thaum pib ntawm lub melting seem, qhov kub yuav tsum ncav cuag lub viscous flow kub kom yaj. Rau crystalline resins, viscous ntws kub sib npaug ntawm cov ntsiab lus melting. Raws li compression thiab molten txheej nce, qhov kub yuav tsum tau nce mus tas li kom ntseeg tau tias polymers nrog sib txawv saw ntev thiab sib txawv thermal energies yaj sequentially. Yog li ntawd, ib zaug qhov kub ntawm qhov kawg ntawm lub melting seem yog tsim, qhov kub nce nyob rau hauv lwm qhov chaw ntawm seem yuav suav hais tias yog linear.
3. Homogenization Section Temperature Requirements: Lub homogenization seem feem ntau yog remelting thiab homogenization, thiab quantitative, tas li - siab, thiab tas li - kub tawm ntawm cov yaj. Qhov kub nyob rau hauv seem no tuaj yeem nyob tsis tu ncua, lossis qhov kub ntawm qhov kawg ntawm qhov melting tuaj yeem nce me ntsis (ze li 2-5 degrees Celsius).
Rau cov tshuab cua tshuab, qhov kub ntawm qhov kev tawm ntawm qhov tuag yuav tsum qis dua, tab sis tsis qis dua qhov kub thiab txias, kom yooj yim nqa zaj duab xis thiab tshuab tshuab. Lub yaj yuav tsum muaj qee yam viscosity thaum tawm hauv qhov tuag los tiv thaiv zaj duab xis tawg lossis tawg. Feem ntau, nws yog li 10-30 degrees Celsius qis dua qhov kawg ntawm homogenization seem. Qhov kub poob los ntawm seem homogenization mus rau qhov tuag tawm tuaj yeem suav tias yog qhov ntsuas kub tsis sib xws.
Cov ntsiab lus tseem ceeb rau Extrusion Temperature Control:
1. Cov resins sib txawv yuav tsum tau sib txawv extrusion zaj duab xis ua kub.
2. Rau tib yam resin, cov qib sib txawv thiab yaj ntws ntsuas yuav tsum tau sib txawv extrusion kub. Kev ntsuas siab dua ua rau muaj kev ntws zoo dua thiab xav tau qhov kub thiab txias.
3. Rau tib yam resin, extrusion kub sib txawv nyob ntawm seb cov yeeb yaj kiab thickness. Thicker films tuaj yeem ua tiav ntawm qhov kub siab dua me ntsis.
4. Qhov kub ntawm qhov tuag me ntsis kuj tuaj yeem pab txo cov viscosity thiab txhim kho cov khoom tsim tau.
