Qhov hnyav yuam kev ntawm cov thoob khib nyiab yas tsis yog ib qho teeb meem, tab sis yog ib qho teeb meem uas khiav los ntawm ntau qhov kev sib txuas xws li cov khoom siv raw, pwm tsim, txheej txheem txhaj tshuaj molding, khoom siv, thiab ib puag ncig yam. Cov yam tseem ceeb no ua haujlwm ua ke kom ua rau muaj qhov sib txawv ntawm qhov hnyav kawg txawm rau cov khoom ntawm tib lub specification thiab batch.
Cov ntaub ntawv raw: qhov tseem ceeb ntawm qhov hnyav yuam kev
Qhov zoo thiab qhov xwm txheej ntawm cov khoom siv raw yog thawj yam uas txiav txim siab qhov hnyav ntawm cov khoom tiav.
Qhov sib txawv ntawm cov khoom nyoos batch thiab qib
Cov khoom siv yas xws li polyethylene (PE) lossis polypropylene (PP) los ntawm cov tuam txhab sib txawv thiab cov khoom siv muaj qhov hloov pauv ntawm cov cim tseem ceeb xws li qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Txawm hais tias tib lub hom phiaj, qhov sib txawv me me ntawm cov khoom sib txawv tuaj yeem ua rau qhov khoom tsis sib haum zaum kawg.
Qhov cuam tshuam ntawm cov khoom siv rov ua dua tshiab thiab impurities
Cov khoom siv rov qab los yog cov khoom tsis huv ntxiv los txo cov nqi yog qhov tseem ceeb ua rau qhov hnyav tsis ruaj khov. Qhov ntom ntawm cov khoom no txawv ntawm cov ntaub ntawv ntshiab, thiab lawv cov muaj pes tsawg leeg yog qhov nyuaj, uas tuaj yeem hloov pauv qhov ceev thiab ntws ntawm cov khoom melted, ua rau qhov hnyav sib txawv.
Artificial hnyav nce ntawm fillers
Qee cov tuam txhab lag luam tsis ncaj ncees yuav txhob txwm tshaj tawm cov khoom pheej yig xws li pob zeb hmoov (calcium carbonate) rau cov khoom siv raw kom nce qhov hnyav. Qhov no yuav ua rau lub thoob khib nyiab dhau los ua "bloated", txawm hais tias qhov hnyav ua tau raws li tus qauv, cov khoom ua nkig, lub zog tsis zoo, thiab kev pabcuam lub neej luv heev.
Cov dej noo hauv cov khoom siv raw
Yog hais tias cov khoom yas ua ntub dej thaum lub sij hawm cia, cov dej noo yuav vaporize thaum txhaj tshuaj molding, tsim cov khoom tsis xws li npuas lossis cov kab nyiaj hauv cov khoom tiav. Qhov no tsis tsuas yog cuam tshuam rau cov tsos thiab lub zog, tab sis kuj ua rau lub cev hnyav dua vim qhov tsis tshua muaj cov qauv sab hauv.
Pwm: "pwm" uas txiav txim siab qhov hnyav
Pwm yog tus yuam sij rau molding, thiab nws tsim, ua kom raug, thiab kev siv cov xwm txheej ncaj qha cuam tshuam qhov hnyav ntawm cov khoom.
Rooj vag tsim thiab sau
Yog hais tias qhov luaj li cas ntawm lub rooj vag (cov channel rau yas yaj mus rau hauv pwm) yog me me dhau, nws yuav cuam tshuam qhov ntim ntawm cov pwm kab noj hniav los ntawm cov yaj, uas yuav ua rau cov khoom "tsis txaus" thiab qhov hnyav tsis txaus.
Pwm kub tswj
Qhov kub tsis sib xws lossis tag nrho qis hauv ntau qhov chaw ntawm cov pwm tuaj yeem cuam tshuam qhov fluidity thiab txias npaum li cas ntawm cov yaj, uas ua rau qhov tsis sib xws ntawm qhov sib txawv ntawm qhov sib txawv thiab cuam tshuam rau qhov hnyav kawg.
Pwm hnav
Tom qab siv sijhawm ntev -, cov kab noj hniav pwm yuav hnav vim qhov yaig ntawm cov yaj, ua rau muaj qhov nce hauv cov kab noj hniav thiab nce qhov hnyav ntawm cov khoom tsim tawm.
Cov txheej txheem ntau yam thaum lub sij hawm txhaj tshuaj molding yog qhov ncaj qha ua rau qhov hnyav hloov pauv, thiab qee qhov kev hloov me me hauv qhov ntsuas yuav cuam tshuam txog qhov hnyav ntawm cov khoom tiav.
01
Kub
Qhov kub thiab txias pwm yog qhov tseem ceeb cuam tshuam rau qhov hnyav ntawm cov khoom. Kev hloov kub tuaj yeem ua rau muaj kev hloov pauv ntawm qhov ntom thiab viscosity ntawm cov yaj, uas ua rau muaj kev cuam tshuam rau qhov ntim thiab qhov hnyav kawg.
02
Siab
Qhov loj ntawm kev txhaj tshuaj siab thiab tuav lub siab ncaj qha cuam tshuam qhov nruj ntawm pwm kab noj hniav filling. Kev tsis txaus siab tuaj yeem ua rau cov khoom tsis txaus thiab cov khoom sib zog; Kev kub siab ntau dhau tuaj yeem ua rau cov khoom "flash" lossis dhau los ua tuab thiab hnyav.
03
Lub sijhawm thiab ceev
Kev teeb tsa ntawm qhov tsis xws li lub sijhawm txhaj tshuaj, tuav lub sijhawm, lub sijhawm txias, nrog rau kev txhaj tshuaj nrawm, yuav cuam tshuam rau lub xeev thiab qhov hnyav kawg ntawm cov yaj hauv pwm kab noj hniav.
04
Rov qab siab thiab pub mis
Tsis txaus rov qab siab tuaj yeem ua rau cov roj sib xyaw rau hauv cov khoom siv molten, ua rau txo qis thiab hnyav dua. Kev pub mis tsis ruaj khov los ntawm lub hopper tuaj yeem ua rau muaj ntau yam khoom nkag mus rau hauv lub hopper, ua rau qhov hnyav nce.
Cov cuab yeej txhaj tshuaj molding: lav kev ua haujlwm
Lub xeev ntawm kev txhaj tshuaj molding tshuab yog lub hauv paus kho vajtse rau kev tsim khoom ruaj khov, thiab nws cov kev hloov pauv tuaj yeem ua rau qhov hnyav hnyav.
1
Hnav ntawm anti rov qab nplhaib:
Yog tias lub nplhaib tiv thaiv rov qab nyob rau hauv pem hauv ntej kawg ntawm lub hau ntawm lub tshuab txhaj tshuaj molding yog hnav, cov khoom molten yuav reflux thaum txhaj tshuaj, ua rau txo qis ntawm cov khoom siv txhaj rau hauv pwm kab noj hniav, thiab cov khoom hnyav yuav sib dua thiab tsis ruaj khov.
2
Kev ntsuas thiab pwm ntsuas phoo:
Kev ntsuas tsis raug mob stroke tuaj yeem ua rau muaj kev hloov pauv ntawm cov khoom molten txhaj txhua zaus. Kev kaw tsis txaus yuav ua rau cov pwm tuaj yeem ncab me ntsis thaum lub sij hawm siab - kev txhaj tshuaj, ua rau cov khoom burrs thiab nce qhov hnyav.
Environmental factors: Sab nraud cuam tshuam uas tsis tuaj yeem tsis quav ntsej
Ib puag ncig ntawm kev cob qhia ntau lawm, tshwj xeeb tshaj yog qhov kub thiab txias, kuj tuaj yeem cuam tshuam rau cov txheej txheem tsim khoom thiab cov khoom hnyav.
Rhiav kub: Cov kev hloov ntawm qhov kub thiab txias tuaj yeem cuam tshuam cov roj kub ntawm cov tshuab txhaj tshuaj molding, pwm kub, thiab cua txias ntawm cov khoom siv raw. Cov khoom tsim tawm hauv lub caij sib txawv lossis lub sijhawm sib txawv yuav muaj qhov sib txawv ntawm qhov hnyav vim qhov sib txawv ntawm ib puag ncig
Cov ntsiab lus
Qhov hnyav yuam kev ntawm cov thoob khib nyiab sab nraum zoov yog tshwm sim los ntawm ntau yam ua ke, los ntawm qhov zoo ntawm cov khoom siv raw thiab qhov tseeb ntawm cov pwm, mus rau qhov chaw ntawm kev txhaj tshuaj molding txheej txheem, cov khoom siv, thiab txawm hloov maj mam hloov hauv qhov chaw tsim khoom. Txhua qhov txuas yuav dhau los ua qhov sib txawv ntawm qhov hnyav hloov pauv. Yog li ntawd, kev nkag siab thiab tswj cov yam ntxwv no yog tus yuam sij rau kev ua tiav cov khoom ruaj khov thiab kev ua tau zoo.
Raws li cov qauv kev lag luam, muaj qee qhov kev tso cai yuam kev hauv qhov hnyav ntawm cov khoom siv yas, feem ntau ntawm 3% thiab 5%, nyob ntawm qhov loj thiab qhov xav tau ntawm cov khoom. Rau cov neeg yuav khoom, thaum them nyiaj rau qhov hnyav, lawv yuav tsum tau ceev faj txog cov khoom lag luam tsis zoo uas tau sau tsis raug raws li "qhov hnyav nce" thiab ua tau "tsis zoo". Raw khoom purity, phab ntsa thickness uniformity, thiab structural tsim yuav tsum tau muab coj los ua lub hauv paus ntsiab lus rau kev ntsuas zoo
