High-density polyethylene (HDPE), raws li cov thermoplastic resin nrog siab crystallinity, zoo heev mechanical zog, thiab dav ua adaptability, yuav tsum tau ceev faj ua hauj lwm. Kev ua haujlwm suav nrog kev npaj cov khoom siv raw, kev tswj cov khoom siv, kev teeb tsa cov txheej txheem, thiab tom qab- ua tiav cov khoom tiav kom ntseeg tau tias cov khoom ruaj khov thiab siab - cov khoom tsim tawm hauv ntau yam txheej txheem molding.
Hauv kev npaj cov khoom siv raw, qib tsim nyog ntawm HDPE resin yuav tsum raug xaiv raws li kev siv thiab kev ua haujlwm ntawm cov khoom. Nws cov dej ntws tus nqi (MFR), qhov ntom ntom, thiab cov khoom siv ntxiv yuav tsum raug kuaj xyuas kom ntseeg tau tias lawv ua tau raws li cov txheej txheem qhov rai. Cov ntaub ntawv nyoos yuav tsum muab cia rau hauv qhov txias, qhuav, thiab lub teeb - tiv thaiv ib puag ncig kom tiv thaiv ua ntej - oxidation tshwm sim los ntawm ultraviolet hluav taws xob thiab kub kub. Rau cov ntaub ntawv granular uas yuav tsum tau ntev - lub sij hawm cia, xyuas kom airtight ntim kom tsis txhob ya raws los yog paug. Kev ua kom sov thiab ziab tuaj yeem ua tau ua ntej siv, tshwj xeeb tshaj yog nyob rau hauv siab -cov av noo ib puag ncig, kom txo tau qhov tsim ntawm npuas thiab nyiaj streaks thaum ua.
Kev teeb tsa kom raug ntawm cov cuab yeej ua haujlwm yog qhov tseem ceeb rau kev ua haujlwm HDPE. Extrusion, txhaj tshuaj molding, tshuab moulding, thiab rotational molding khoom yuav tsum tau nruab nrog cov txheej txheem kub tswj thiab txhim khu kev qha kis tau tus mob. HDPE yaj kub yog feem ntau ntawm 120-130 degree, tab sis qhov no txawv ntawm qib sib txawv. Thaum lub sij hawm ua hauj lwm, lub chim kub yuav tsum tau teem nyob rau hauv cov theem kom ib tug du kub gradient los ntawm cov seem pub rau cov tuag, tsis txhob overheating cheeb tsam uas yuav ua rau thermal degradation los yog ib tug cia li poob rau hauv viscosity. Screw ceev thiab rov qab siab yuav tsum tau kho raws li cov khoom viscosity thiab ntau lawm yuav tsum tau tiv thaiv shear overheating los yog uneven plasticization.
Hauv tshuab moulding, parison kub thiab extrusion ceev yuav tsum raug tswj xyuas kom meej cov phab ntsa tuab. Lub tshuab siab thiab tuav lub sij hawm yuav tsum tau sib phim nrog cov khoom zoo thiab tus nqi txias kom ua tiav qhov zoo tshaj plaws contour clarity thiab lub zog. Thaum lub sij hawm extrusion molding, yuav tsum tau them nyiaj mloog mus rau kev sib koom tes ntawm kev tuag clearance thiab traction ceev kom tsis txhob muaj kev sib tw ntau dhau uas tuaj yeem ua rau muaj kev txawv txav ntawm cov molecular orientation los yog qhov txawv txav. Cov yeeb nkab ntau lawm kuj yuav tsum tau nqus cov sizing thiab txau txias kom stabilize lub sab nraud thiab sab hauv phab ntsa smoothness. Cov txheej txheem txhaj tshuaj molding yuav tsum tau ua kom zoo dua ntawm kev txhaj tshuaj nrawm, tuav lub zog, thiab lub sijhawm txias. Ntau-theem tuav cov kev pabcuam siab yuav tsum tau siv los txo cov cim shrinkage thiab kev ntxhov siab sab hauv, thiab pwm kub yuav tsum tswj raws li crystallization yam ntxwv kom tsis txhob muaj kev sib hloov thiab kev ua haujlwm hloov pauv. Rau kev sib hloov molding, yuav tsum tau them nyiaj mloog mus rau lub uniformity ntawm preheating ntawm hmoov HDPE, tswj lub cub tawg kub thiab kev sib hloov ceev kom zoo ib yam adhesion thiab tag nrho fusion ntawm cov khoom molten nyob rau hauv lub pwm kab noj hniav.
Kev saib xyuas online yuav tsum tau ua thaum lub sijhawm ua haujlwm, suav nrog lub siab yaj, qhov kub thiab txias, cov khoom zoo li, thiab qhov ntev. Parameters yuav tsum tau kho tam sim ntawd thaum kuaj pom tej yam txawv txav. Rau ntau-batch ntau lawm, cov khoom siv raw khoom hloov pauv thiab cov cuab yeej tu yuav tsum tau tswj xyuas kom tsis txhob hla- paug cuam tshuam rau kev ua haujlwm. Tom qab demolding, cov khoom yuav tsum tau annealed los yog laus raws li xav tau los tso cov residual kev nyuaj siab thiab txhim kho qhov seem stability.
Tom qab siv, cov cuab yeej yuav tsum tau ntxuav thiab khaws cia, tshem tawm cov seem yaj thiab hmoov av. Kev khiav hauj lwm ntawm cov cua kub coils, ntsuas kub tswj kev sojntsuam, thiab cov khoom sib kis yuav tsum raug kuaj xyuas kom ntseeg tau tias muaj kev ntseeg siab rau kev ua haujlwm tom ntej. Cov khoom pov tseg thiab cov khoom tsis zoo yuav tsum tau muab sib cais. Reusable HDPE pellets yuav tsum tau muab ntxuav thiab qhuav ua ntej siv rau hauv kev tsim khoom kom sib npaug zoo thiab kev siv cov peev txheej.
Feem ntau, kev ua haujlwm HDPE qhia txog kev tswj cov khoom siv raw, kev kho cov khoom siv, kev ua kom zoo dua qub, thiab kev saib xyuas tag nrho ntawm -. Los ntawm kev ua raws li tus qauv thiab kev ua tiav, kev ua haujlwm zoo, ruaj khov, thiab siab - cov hom phiaj tsim tau zoo tuaj yeem ua tiav hauv ntau yam txheej txheem molding.
