Peb tsuas yog ua PVC qab nthab vaj huam sib luag,phab ntsa panels, WPC qhov rooj ncej, qhov rais, trunking extruder tshuab.
Raws li peb txhua tus paub, PVC (polyvinyl chloride) yog cov yas uas muaj cua sov, thiab nws lub teeb ruaj khov kuj tsis zoo. Nyob rau hauv qhov kev txiav txim ntawm tshav kub thiab lub teeb, nws yog ib qho yooj yim rau de-HCl cov tshuaj tiv thaiv, uas yog feem ntau hu ua degradation. Qhov tshwm sim ntawm degradation yog tias lub zog ntawm cov khoom yas txo qis, tsis muaj xim, thiab cov kab dub tshwm, thiab nyob rau hauv qhov hnyav, cov khoom poob lawv cov nqi siv. Cov yam ntxwv cuam tshuam rau qhov degradation ntawm PVC muaj xws li cov qauv polymer, polymer zoo, stabilization system, molding kub thiab lwm yam. Raws li kev paub dhau los, qhov yellowing ntawm PVC profiles feem ntau yog vim yog muab tshuaj txhuam ntawm qhov tuag. Yog vim li cas yog tias qhov ntws channel ntawm qhov tuag yog qhov tsis tsim nyog lossis lub hauv paus polishing hauv cov dej ntws tsis zoo, thiab muaj thaj tsam stagnation. Cov kab daj ntawm PVC profiles feem ntau yog muab tshuaj txhuam rau hauv lub tshuab chim. Qhov laj thawj tseem ceeb yog tias muaj lub kaum sab xis tuag ntawm cov ntawv ci (lossis lub tes tsho hloov), thiab cov khoom ntws tsis zoo. Yog hais tias cov kab daj yog vertically ncaj nraim rau ntawm PVC profile, cov khoom stagnant yog nyob rau ntawm qhov chaw tuag; yog tias txoj kab daj tsis ncaj, nws yog nyob ntawm lub tes tsho hloov pauv. Yog tias cov kab daj kuj tshwm sim thaum cov qauv thiab cov khoom siv tsis hloov pauv, qhov laj thawj yuav tsum tau pom los ntawm cov qauv siv tshuab, thiab qhov pib ntawm decomposition yuav tsum pom thiab tshem tawm. Yog tias qhov laj thawj tsis tuaj yeem pom los ntawm cov qauv siv tshuab, nws yuav tsum tau txiav txim siab tias muaj teeb meem hauv cov qauv lossis cov txheej txheem. Kev ntsuas kom tsis txhob degradation muaj xws li cov hauv qab no:
(1) nruj me ntsis tswj cov kev ntsuas ntawm cov ntaub ntawv raw, thiab siv cov khoom tsim nyog;
(2) Tsim cov txheej txheem molding tsim nyog, raws li cov ntaub ntawv PVC tsis yooj yim rau degrade;
(3) Cov khoom siv pwm thiab pwm yuav tsum tau ua kom zoo, thiab cov ces kaum tuag lossis qhov khoob uas muaj nyob rau ntawm qhov chaw sib cuag ntawm cov khoom siv thiab cov khoom yuav tsum raug tshem tawm; cov ntws channel yuav tsum tau streamlined thiab haum nyob rau hauv ntev; Cov cuab yeej cua sov yuav tsum tau txhim kho, qhov rhiab heev ntawm qhov ntsuas kub thiab qhov ua tau zoo ntawm cov cua txias yuav tsum tau txhim kho.
khoov deformation
Khoov thiab deformation ntawm PVC profiles yog ib qho teeb meem tshwm sim hauv cov txheej txheem extrusion. Cov laj thawj yog: qhov tsis sib xws ntawm qhov tuag; tsis txaus cua txias ntawm cov khoom thaum lub sij hawm txias thiab teeb, thiab inconsistent post-shrinkage; khoom siv thiab lwm yam
Lub concentricity thiab levelness ntawm tag nrho cov kab ntawm lub extruder yog cov prerequisites rau kev daws qhov khoov deformation ntawm PVC profiles. Yog li ntawd, lub concentricity thiab levelness ntawm extruder, tuag, calibrating tuag, dej tank, thiab lwm yam yuav tsum tau kho thaum twg cov pwm hloov. Ntawm lawv, kom ntseeg tau tias tsis sib xws ntawm qhov tuag yog tus yuam sij los daws qhov khoov ntawm PVC profiles. Cov tuag yuav tsum tau ua tib zoo sib dhos ua ntej pib lub tshuab, thiab qhov sib txawv ntawm txhua qhov yuav tsum zoo ib yam. Kho qhov kub thiab txias. Yog tias qhov kev hloov kho tsis raug, cov qib plasticization ntawm cov khoom yuav tsum tau nce kom tsim nyog. Kev hloov pauv Kev hloov kho lub tshuab nqus tsev kawm ntawv thiab qhov cua txias ntawm qhov chaw pwm yog qhov tsim nyog los daws qhov deformation ntawm PVC profiles. Tus nqi ntawm cov dej txias nyob rau sab ntawm qhov profile uas bears lub tensile kev nyuaj siab yuav tsum tau nce; cov txheej txheem ntawm kev kho tshuab offset chaw yog siv los kho, uas yog, kho thaum tsim Cov chaw bolts nyob rau hauv nruab nrab ntawm lub calibrating tuag yog reversely me ntsis kho raws li khoov kev taw qhia ntawm lub profile (ceev faj yuav tsum tau siv thaum siv txoj kev no, thiab qhov kev hloov pauv yuav tsum tsis txhob loj dhau). Ua tib zoo saib xyuas cov pwm yog qhov kev tiv thaiv zoo. Koj yuav tsum tau ua tib zoo saib xyuas qhov ua haujlwm zoo ntawm cov pwm, thiab tswj thiab tswj cov pwm txhua lub sijhawm raws li qhov xwm txheej tiag tiag.
Los ntawm kev siv cov kev ntsuas saum toj no, qhov khoov deformation ntawm qhov profile tuaj yeem raug tshem tawm, thiab cov extruder tuaj yeem lav tau los ua cov khoom zoo PVC profile stably thiab ib txwm.
Tsawg kub cuam tshuam lub zog
Cov yam ntxwv cuam tshuam rau qhov kub thiab txias cuam tshuam lub zog ntawm PVC profiles muaj xws li cov qauv, profile seem qauv, pwm, qib ntawm plasticization, kuaj tej yam kev mob, thiab lwm yam.
(1) Formula
Tam sim no, CPE tau dav siv los ua kev hloov pauv. Ntawm lawv, CPE nrog ib feem ntawm 36% ntawm cov tshuaj chlorine muaj kev hloov kho zoo dua ntawm PVC, thiab qhov ntau npaum li cas yog 8-12 feem ntawm qhov loj. Elasticity thiab compatibility nrog PVC.
(2) Profile seem qauv
High-zoo PVC profiles muaj ib tug zoo cross-sectional qauv. Feem ntau, cov qauv nrog cov ntu me me yog qhov zoo dua li cov qauv nrog cov ntoo loj loj, thiab txoj hauj lwm ntawm kev txhawb nqa sab hauv ntawm qhov ntoo khaub lig yuav tsum tau teeb tsa kom tsim nyog. Ua kom lub thickness ntawm sab hauv tav thiab txais yuav ib ncig arc hloov ntawm kev sib txuas ntawm sab hauv tav thiab phab ntsa yog txhua yam pab tau los txhim kho qhov kub tsis tshua muaj kev cuam tshuam lub zog.
(3) Pwm
Qhov cuam tshuam ntawm cov pwm ntawm qhov kub tsis tshua muaj qhov cuam tshuam lub zog yog feem ntau yog tshwm sim hauv lub siab yaj thiab kev tswj kev ntxhov siab thaum txias. Thaum daim ntawv qhia tau txiav txim siab, lub siab yaj yog feem ntau cuam tshuam nrog kev tuag. Cov profiles uas tawm ntawm qhov tuag yuav tsim cov kev ntxhov siab sib txawv los ntawm cov txheej txheem txias sib txawv. Qhov kub tsis tshua muaj kev cuam tshuam lub zog ntawm PVC profiles yog qhov tsis zoo qhov twg qhov kev ntxhov siab yog concentrated. Thaum PVC profiles raug cua txias sai, lawv muaj kev ntxhov siab. Yog li ntawd, cov txheej txheem ntawm cov dej txias channel ntawm cov pwm calibrating yog qhov tseem ceeb heev. Cov dej kub feem ntau tswj tau ntawm 14 ° C-16 ° C. Txoj kev ua kom txias qeeb yog qhov muaj txiaj ntsig los txhim kho qhov tsis tshua muaj kev kub ntxhov ntawm PVC profiles.
Txhawm rau kom muaj qhov zoo ntawm cov pwm, ntxuav cov tuag tsis tu ncua kom tsis txhob muaj impurities clogging qhov tuag vim yog lub sij hawm ntev tas mus li ntau lawm, ua rau txo qis cov zis thiab nyias txhawb nqa tav, uas cuam tshuam rau qhov kub thiab txias cuam tshuam lub zog. Kev tu ntawm cov pwm calibrating tsis tu ncua tuaj yeem ua kom txaus calibrating lub tshuab nqus tsev thiab cov dej ntws ntawm cov pwm calibrating kom muaj cua txias txaus thaum lub sij hawm tsim cov txheej txheem ntawm qhov profile, txo qhov tsis xws luag thiab txo cov kev ntxhov siab sab hauv.
(4) Qib ntawm plasticization
Ib tug loj tus naj npawb ntawm kev tshawb fawb thiab kev ntsuam xyuas qhia tau hais tias qhov zoo tshaj plaws tus nqi ntawm tsawg-kub feem ntau zog ntawm PVC profiles yog tau thaum lub degree ntawm plasticization yog 60% -70%. Kev paub qhia tau hais tias "siab kub thiab qis ceev" thiab "tsis tshua muaj kub thiab kub ceev" tuaj yeem tau txais tib qib ntawm plasticization. Txawm li cas los xij, tsis tshua muaj kub thiab kub ceev yuav tsum tau xaiv nyob rau hauv ntau lawm, vim hais tias lub cua sov lub hwj chim noj yuav txo tau ntawm qhov kub thiab txias, thiab ntau lawm efficiency yuav tsum tau txhim kho nyob rau hauv kev kub ceev, thiab cov nyhuv shearing yog pom tseeb thaum lub ntxaib-ntsia hlau extruder yog extruded. ntawm kev kub ceev.
(5) Cov xwm txheej xeem
GB / T8814-2004 muaj cov kev cai nruj rau kev ntsuas kub qis, xws li qhov ntev profile, poob rauj loj, rauj lub taub hau vojvoog, cov qauv khov, ib puag ncig kev xeem, thiab lwm yam. Yuav kom ua tau qhov kev ntsuam xyuas qhov tseeb, cov kev cai saum toj no yuav tsum yog. nruj me ntsis raws li.
Ntawm lawv: "qhov cuam tshuam ntawm qhov poob phaus ntawm qhov chaw ntawm tus qauv" yuav tsum nkag siab tias "ua rau qhov cuam tshuam ntawm qhov poob phaus ntawm qhov nruab nrab ntawm cov kab noj hniav ntawm cov qauv", xws li cov txiaj ntsig ntawm qhov kev sim yog qhov tseeb dua.
Cov kev ntsuas los txhim kho qhov kub tsis tshua muaj kev cuam tshuam kev ua tau zoo yog raws li hauv qab no:
1. Ua tib zoo xyuas qhov zoo ntawm cov ntaub ntawv siv, thiab ua tib zoo saib xyuas cov khoom siv ntawm cov khoom pov tseg thiab lub tshuab nqus tsev vacuum. Cov paug tawm ntawm qhov tuag yuav tsum yog cov xim tib yam, muaj qee yam gloss, thiab cov paug tawm yuav tsum tsis sib xws. Nws yuav tsum muaj elasticity zoo thaum kneading los ntawm tes. Cov khoom ntawm lub tshuab nqus tsev chaw nres nkoj ntawm lub cav tseem ceeb yog nyob rau hauv lub xeev ntawm "taum curd residue", thiab tsis tuaj yeem tawm lub teeb thaum nws pib plasticized. Cov tsis xws li lub ntsiab cav tam sim no thiab lub taub hau siab yuav tsum ruaj khov.
2.Standardize cov txheej txheem tswj xyuas kom cov nyhuv plasticizing. Kev tswj qhov kub thiab txias yuav tsum yog "lub phiab" txheej txheem. Cov cua kub hloov pauv ntawm thawj thaj tsam ntawm extruder mus rau lub taub hau yuav tsum yog hom "basin". Hloov mus rau "sib npaug sab hauv thiab sab nraud" kom ntseeg tau tias cov khoom muaj cua sov sib npaug. Nyob rau hauv cov ntaub ntawv ntawm tib lub mis, cov txheej txheem extrusion yuav tsum tsis txhob hloov heev.
Post lub sij hawm: Jun-07-2023
