Theem Ib: Plasticization thiab Thawv hauv Extruder
1. Cov Khoom Muag Khoom Muag: Tom qab nkag mus rau hauv cov ntsia hlau los ntawm lub hopper, PP khoom pellets ua ntej mus txog ntu no. Ntawm no, cov khoom yog compacted rau hauv ib tug "khoom plug" thiab pib preheating nyob rau hauv cov kev sib xyaw ua ke ntawm sab nraud chim cua sov thiab rotational kev sib txhuam kub los ntawm cov ntsia hlau, npaj rau melting.
2. Melting and Compression Section: Qhov no yog qhov chaw tseem ceeb tshaj plaws. Cov ntsia hlau flute qhov tob maj mam txo qis ntawm no, ua kom muaj zog shear thiab compression rog ntawm cov khoom. Tib lub sijhawm, nrog cov cua kub zoo, PP pellets tag nrho yaj mus rau hauv lub xeev khov. Tshooj lus no tseem tshem tawm cov pa nkag los ntawm cov khoom siv.
3. Homogenization thiab Metering Section: Lub PP molten undergoes ntxiv sib tov thiab homogenization ntawm no, stabilizing nws kub thiab txaus tus nqi. Thaum kawg, cov ntsia hlau ua haujlwm zoo li lub twj tso kua mis ntsuas qhov tseeb, xa cov txheej txheem yaj mus rau lub taub hau tuag ntawm qhov siab thiab ntws tus nqi.
Theem Ob: Tuag Forming thiab Secondary Moulding
1. Tuag Forming: Lub yaj dhau los ntawm cov ntsia hlau- hom manifold tuag lossis pob tawb tuag. Cov tuag no, tshwj xeeb tshaj yog tsim los rau PP, tshem tawm cov khoom "nco" cov teebmeem thiab cov kab txuas, kom ntseeg tau tias muaj kev sib txawv ntau dua nyob rau hauv qhov tuag. Qhov no guarantees tuab yeeb nkab phab ntsa nrog zoo ib yam thickness. Qee qhov kev tsim kho siab tshaj suav nrog cov khoom siv zoo li qub hauv qab ntawm qhov tuag kom ntxiv dag zog rau qhov kub thiab txias sib xws.
2. Sizing thiab txias: Cov yeeb nkab khoob extruded los ntawm qhov tuag yog kub heev thiab tsis muaj zog txaus. Nws tam sim ntawd nkag mus rau hauv lub tshuab nqus tsev sizing chamber qhov twg lub tshuab nqus tsev siab quab yuam nws tawm tsam sab hauv phab ntsa ntawm lub tes tsho loj, precisely txhais cov yeeb nkab sab nraud txoj kab uas hla thiab roundness. Tom qab ntawd, cov yeeb nkab hla dhau los ntawm cov twj tso kua mis txias los yog cov dej da dej, qhov twg ntau - theem dej txias ua kom tiav nws.
3. Kev kos duab thiab txiav: Cov yeeb nkab txias yog txuas ntxiv tawm ntawm qhov nrawm nrawm los ntawm txoj siv- hom tshuab kos duab, ua kom cov kab ntau lawm ruaj khov. Thaum kawg, lub tshuab txiav (feem ntau yog siv nti- dawb txiav) txiav cov yeeb nkab mus rau qhov ntev preset, ua kom tiav cov yeeb nkab tiav.