Yuav ua li cas tiv thaiv cavitation hauvpolyurethane foaming tshuab
1. nruj me ntsis tswj qhov piv thiab txhaj ntim ntawm cov tshuaj thawj
Tswj qhov piv ntawm cov khoom siv dub, ua ke polyether thiab cyclopentane.Nyob rau hauv cov xwm txheej uas tag nrho cov ntim ntim tseem tsis hloov pauv, yog tias qhov feem pua ​​​​ntawm cov khoom siv dub loj dhau lawm, cavitation yuav tshwm sim, yog tias qhov feem pua ​​​​ntawm cov khoom dawb loj dhau lawm, cov npuas yuav tshwm sim, yog tias qhov feem pua ​​​​ntawm cyclopentane loj dhau, npuas yuav tshwm sim, thiab yog tias qhov kev faib ua feem tsawg dhau, cavitation yuav tshwm sim.Yog tias qhov kev faib ua feem ntawm cov ntaub ntawv dub thiab dawb tsis sib npaug, yuav muaj kev sib xyaw tsis sib xws thiab shrinkage ntawm npuas.

Tus nqi txhaj tshuaj yuav tsum yog raws li cov txheej txheem yuav tsum tau ua.Thaum cov nyiaj txhaj tshuaj qis dua li cov txheej txheem yuav tsum tau ua, cov npuas molding ceev yuav tsawg, lub zog yuav qis, thiab txawm tias qhov tshwm sim ntawm kev ntim cov vacuoles tsis zoo yuav tshwm sim.Thaum lub ntim ntim ntau dua li cov txheej txheem yuav tsum tau ua, yuav muaj npuas nthuav dav thiab xau, thiab lub thawv (qhov rooj) yuav deformed.
2. Kev tswj kub ntawmpolyurethane foaming tshuabyog tus yuam sij rau kev daws cavitation
Thaum qhov kub thiab txias siab dhau lawm, cov tshuaj tiv thaiv yog nruj thiab nyuaj rau tswj.Nws yog ib qho yooj yim uas tshwm sim tias qhov ua tau zoo ntawm cov kua npuas uas tau txhaj rau hauv lub thawv loj tsis zoo li qub.Cov kua npuas uas tau txhaj thaum pib tau dhau los ua cov tshuaj tiv thaiv, thiab cov viscosity nce sai, thiab cov kua npuas uas tau txhaj tom qab tseem tsis tau hnov ​​​​qab.Yog li ntawd, cov kua npuas uas tau txhaj tom qab tsis tuaj yeem thawb cov kua npuas ua ntej mus rau pem hauv ntej kawg ntawm cov txheej txheem foaming ntawm lub thawv, uas ua rau hauv zos cavitation hauv lub thawv.
Cov ntaub ntawv dub thiab dawb yuav tsum tau kho ntawm qhov kub thiab txias ua ntej foaming, thiab qhov kub ntawm foaming yuav tsum tau tswj ntawm 18 ~ 25 ℃.Qhov kub ntawm qhov cub preheating ntawm cov khoom siv foaming yuav tsum tswj ntawm 30 ~ 50 ℃, thiab qhov kub ntawm cov pwm foaming yuav tsum tswj ntawm 35 ~ 45 ℃
Thaum qhov kub ntawm cov pwm foaming tsawg dhau lawm, qhov fluidity ntawm cov npuas dej ua kua tsis zoo, lub sijhawm kho tau ntev, cov tshuaj tiv thaiv tsis tiav, thiab cavitation tshwm sim;Thaum qhov kub ntawm foaming pwm yog siab dhau lawm, cov yas liner yog deformed los ntawm tshav kub, thiab cov npuas-kua system reacts hnyav.Yog li ntawd, qhov kub ntawm lub foaming pwm thiab qhov kub thiab txias ntawm lub qhov cub foaming yuav tsum tau tswj nruj me ntsis.
Tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj no, lub foaming pwm, preheating rauv, foaming rauv, lub thawv thiab lub qhov rooj yuav tsum preheated rau ntau tshaj 30 feeb txhua txhua tag kis sawv ntxov thaum kab qhib.Tom qab foaming rau ib lub sij hawm ntawm lub caij ntuj sov, lub foaming system yuav tsum tau txias.

Kev Tswj Siab ntawm Polyurethane Foaming Tshuab
Lub siab ntawm lub tshuab foaming yog tsawg heev.Cov khoom siv dub, dawb thiab cyclopentane tsis sib xyaw ua ke, uas tau tshwm sim raws li qhov tsis sib xws ntawm polyurethane ua npuas ncauj, cov npuas loj hauv zos, ua npuas ncauj tawg, thiab hauv zos mos ua npuas ncauj: dawb, daj lossis dub streaks tshwm rau ntawm npuas, ua npuas ncauj.Kev txhaj tshuaj siab ntawm lub tshuab foaming yog 13 ~ 16MPa