Txhaj molding txheej txheem ntawm cov khoom siv PVC

PVC khoom yog pheej yig, inherently anti-inflammatory, nyuaj thiab muaj zog, zoo tshuaj tiv thaiv, shrinkage tus nqi ntawm 0.2-0.6%, cov khoom yog nce siv nyob rau hauv cov khoom siv hluav taws xob, machinery, kev tsim kho, txhua hnub khoom siv, khoom ua si, ntim, rau cov yam ntxwv ntawm Cov khoom siv PVC, kev tshuaj xyuas ntawm cov khoom txhaj tshuaj molding txheej txheem yog raws li nram no:

1, Cov khoom ntawm PVC cov ntaub ntawv

PVC thermal stability tsis zoo, molding kub thiab decomposition kub yog ze rau, tsis muaj kev txav mus los, cov tsos ntawm ib qho yooj yim rau tsim tsis xws luag, PVC cov khoom cua sov kuj tsis zoo, qhov yooj yim tshaj rau hlawv, acidic gas thiab corrosion ntawm pwm, ua. tuaj yeem ntxiv plasticizer kom nws fluidity, - feem ntau yuav tsum tau ntxiv cov khoom siv ntxiv rau kev siv, nws lub zog, hluav taws xob rwb thaiv tsev, tshuaj lom neeg zoo.

二、 Pwm thiab rooj vag tsim

Yuav kom txo lub voj voog txhaj tshuaj, qhov luv ntawm qhov chaw txhaj tshuaj yog qhov zoo dua, ntu ntu yuav tsum yog lub vaj-zoo li tus, qhov tsawg kawg nkaus txoj kab uas hla ntawm qhov chaw txhaj tshuaj yog 6 hli, rau hauv lub vaj lub khob hliav qab, lub kaum sab xis ntawm 5 degrees, zoo dua. Nrog rau qhov dej txias, qhov dej txias tuaj yeem tiv thaiv cov khoom tsis zoo ntawm cov khoom siv rau hauv cov kab noj hniav, thiab cov ntaub ntawv no yuav cuam tshuam rau cov khoom tiav thiab lub zog ntawm cov khoom.

Txoj kab nqes tuag yuav tsum nyob nruab nrab ntawm 0.50 thiab 10 kom ntseeg tau tias cov kab noj hniav muaj cov khoom cua txaus.Qhov ntau qhov venting loj yog 0.03-0.05mm tob thiab 6mm dav, los yog 0.03-0.05mm clearance nyob ib ncig ntawm txhua tus ejector tus pin.Cov tuag yuav tsum tau ua los ntawm stainless hlau los yog tawv chrome plated.

Cov txheej txheem PVC molding

PVC yog cov yas uas muaj cua sov.Overheating los yog overheating shearing yuav ua rau decomposition thiab kis tau sai heev, vim hais tias ib qho ntawm cov khoom decomposition (xws li kua qaub los yog HCI) yuav muaj catalytic nyhuv, uas ua rau ntxiv decomposition ntawm cov txheej txheem, thiab cov kua qaub yuav erode cov hlau thiab ua rau nws hloov.Yog hais tias nws yog dented, cov txheej tiv thaiv ntawm cov hlau yuav tev tawm, ua rau xeb, uas ua rau muaj kev phom sij ntau dua rau tib neeg lub cev.Cov ntsia hlau ntev-inch piv yog 18 ~ 24: 1, peb theem piv yog 3: 5: 2, thiab compression piv yog 1.8 ~ 2.Qhov tob ntawm cov ntsia hlau zawj nyob rau hauv seem pub yog pom zoo raws li hauv qab no:

Kev txhaj tshuaj ceev yuav tsum tau qeeb, txwv tsis pub ntau shearing yuav degrade cov khoom.Thaum siv UPVC los tsim cov khoom tuab tuab tuab heev, yuav tsum siv ntau theem kev txhaj tshuaj nrawm.Yog hais tias lub teeb xim av kab txaij tawm ntawm lub rooj vag, nws txhais tau hais tias qhov kev txhaj tshuaj nrawm dhau lawm.ceev.

Lub hau ntawm cov ntsia hlau yuav tsum muaj lub kaum sab xis ntawm 25 ~ 30 degrees.Thaum cov ntsia hlau nyob hauv qhov chaw, qhov kev ncua deb ntawm lub taub thiab lub nozzle yuav tsum yog 0.7 ~ 1.8 hli.Cov ntsia hlau yuav tsum tau ua los ntawm stainless hlau los yog chrome-plated.

1)Screw gasket: Cov ntsia hlau gasket nyob nruab nrab ntawm 2 ~ 3mm, thiab lub sijhawm loj yog loj dua

2)Kev txhaj tshuaj ntim: Lub sijhawm nyob hauv qhov tseeb yuav tsum tsis pub tshaj 3 feeb.

3) Qhov kub thiab txias:

Qhov ntsuas kub tau muab rau tsuas yog siv tau, thiab kev hloov kho tsim nyog tau ua raws li qhov tseeb ntawm lub tshuab thiab cov khoom siv raw, uas kuj tseem tuaj yeem dhau qhov kev pom zoo.

Qhov ntsuas kub ntawm qhov nruab nrab pub mis nyob rau sab pem hauv ntej ntawm lub pwm nozzle (0C) 30-60 170-190 160-180 150-170

Kev txhaj tshuaj ntim siv rau 140-160 yog 20 ~ 85% ntawm cov theoretical txhaj ntim ntawm lub tshuab.Qhov me me ntawm kev txhaj tshuaj ntim tau siv, lub sijhawm khaws cia ntev dua ntawm cov khoom siv thiab ntau dua qhov kev pheej hmoo ntawm kev puas tsuaj tom qab cua sov.cin.com ua

4) Lub Sijhawm nyob hauv Barrel:

Raws li qhov ntsuas kub ntawm 2000C (cov khoom siv roj hmab), lub sijhawm nyob hauv siab tshaj plaws ntawm lub thoob tuaj yeem tshaj 5 feeb, thaum qhov kub ntawm 2100C.

5) Txhaj ceev:

Kev txhaj tshuaj ceev yuav tsum qeeb, txwv tsis pub, cov khoom yuav degrade vim shearing ntau dhau.Kev txhaj tshuaj ntau theem yuav tsum tau siv thaum siv UPVC los tsim cov khoom siv phab ntsa tuab heev.Yog hais tias muaj lub teeb xim av kab txaij tawm ntawm lub rooj vag, nws txhais tau hais tias qhov kev txhaj tshuaj nrawm dhau lawm.ceev.