1.Equipment condition: Hardware Foundation of Stability
Kev tswj qhov kub thiab txias: Qhov kub ntawm txhua ntu ntawm extruder (zaum pub mis, thaj chaw compression, metering zone), nrog rau lub taub hau thiab tuag, yuav tsum yog qhov tseeb thiab ruaj khov. Kub hloov pauv ncaj qha ua rau muaj kev hloov pauv hauv yaj viscosity, uas ua rau cov dej ntws tsis sib xws thiab hloov pauv ntawm cov kab sab nraud thiab phab ntsa thickness ntawm cov yeeb nkab.
Screw thiab Barrel Wear: Tom qab siv sij hawm ntev -, qhov kev tshem tawm ntawm cov ntsia hlau thiab lub thoob yuav nce, ua rau txo cov yas yas, lub zog ntawm cov khoom xa tuaj, tsis ruaj khov, thiab xyoob-pob txha lossis cov phab ntsa tuab tsis sib xws.
Tsav thiab Tswj System: Kev tsav tsheb ruaj khov ntawm lub cev muaj zog thiab kev tswj xyuas kom raug ntawm cov ntsia hlau ceev yog qhov tseem ceeb ntawm cov khoom tso tawm ruaj khov. Teb lag luam nyob rau hauv qub zaus converters los yog tswj systems yuav ua rau kom ceev hloov.
2.Raw Material Properties: Intrinsic Foundation of Stability
Raw Material Quality thiab Formula:
Melt Flow Rate (MFR): Cov qib sib txawv ntawm PE sib txawv heev hauv MFR. Tsis ruaj tsis khov MFR los yog tsis sib xws batch mixing yuav ua rau inconsistent melt flow.
impurities thiab Moisture: Plua plav, gel hais, los yog cov kab nrib pleb uas muaj nyob rau hauv cov ntaub ntawv raw yuav tsim cov pob zeb siv lead ua, npuas, los yog qhov thaum lub sij hawm extrusion, ua rau kev puas tsuaj txuas ntxiv mus.
Recycled Material Ratio thiab Zoo: Thaum ntxiv cov khoom siv rov ua dua tshiab, qhov sib txawv loj ntawm qhov loj me, qib plasticization, thiab MFR piv nrog cov khoom siv nkauj xwb, nrog rau kev sib xyaw tsis sib xws, yog cov feem ntau ua rau cov txheej txheem hloov pauv.
Raw Material Pre-kev kho mob: Txawm hais tias PE muaj qhov nqus dej tsawg, tseem xav tau kom qhuav yog tias qhov chaw cia khoom ntub, tshwj xeeb tshaj yog rau siab - cov kav dej ua tau zoo. Preheating tuaj yeem txo lub ntsiab lub cev muaj zog thiab txhawb kev ruaj khov plasticization.
3.Mould thiab Calibration System: Qhov Txuas Txuas hauv Kev Tsim
Tuag Tsim: Lub smoothness ntawm cov ntws channel tsim ntawm lub tuag thiab mandrel, raws li zoo raws li qhov tsim nyog ntev ntawm lub calibration seem, ncaj qha cuam tshuam lub uniformity ntawm siab thiab ntws tshaj tawm tis ntawm cov yaj ntawm lub qhov hluav taws xob.
Tuag Kub: Tsis sib npaug qhov kub ntawm qhov sib txawv ntawm qhov tuag yuav ua rau cov cua txias sib txawv ntawm cov yaj ntawm qhov hluav taws xob, ua rau eccentricity thiab phab ntsa thickness variation.
Sizing thiab Cooling:
Lub tshuab nqus tsev nqus tsev nqus tsev vacuum Calibration Tank: Kev hloov pauv hauv lub tshuab nqus tsev yuav ncaj qha ua rau muaj kev hloov pauv ntawm cov kav dej sab nraud.
Cooling Uniformity: Cov dej tsis sib xws, qhov kub thiab txias, thiab qhov ntws ntawm cov dej txias yuav ua rau cov yeeb nkab tsis sib haum, ua rau khoov, ovality, lossis kev ntxhov siab sab hauv.
4.Process Parameters: Lub hauv paus ntawm kev ruaj ntseg tswj
Kev ntsuas kub: Tsis kho; nws xav tau zoo- kho raws li cov khoom siv raw, ntsia hlau ceev, thiab cov xwm txheej puag ncig. Lub hauv paus ntsiab lus yog los xyuas kom meej ib yam thiab ruaj khov yaj kub.
Screw Speed: Qhov no yog qhov tseem ceeb parameter txiav txim siab cov zis extrusion. Yog tsis muaj qhov ruaj khov ceev ceev, tsis muaj kev ruaj ntseg tuaj yeem ua tiav.
Haul-off Ceev: Qhov sib piv ntawm kev thauj mus los- tawm ceev thiab extrusion kab ceev (haul-tawm piv) yog qhov tseem ceeb rau kev tswj cov yeeb nkab phab ntsa tuab thiab qhov tseeb qhov tseeb. Kev hloov pauv me ntsis hauv kev thauj mus los -off ceev yuav raug cuam tshuam ncaj qha rau ntawm phab ntsa tuab.
Back Pressure: Kho los ntawm kev hloov qhov screen mesh loj, kev tsim, lossis kub hauv thaj tsam ntsuas. Lub siab rov qab zoo txhim kho homogenization, tab sis kev siab rov qab ntau dhau ua rau dhau - shearing thiab siab dua melting kub.