Polyurethane txhaj tshuaj moldingyog cov txheej txheem tsim khoom siv los tsim cov khoom yas siab -cov khoom siv yas nrog cov geometry nyuaj thiab cov qhov ntev meej. Nws yog cov txheej txheem ntau yam uas sib txuas cov khoom siv ntawm polyurethane nrog kev ua haujlwm ntawm kev txhaj tshuaj molding, ua rau nws siv dav hauv kev lag luam xws li tsheb thiab aerospace mus rau cov cuab yeej kho mob thiab cov khoom siv. Cov txheej txheem no tso cai rau kev tsim cov khoom lag luam uas xav tau lub zog siab, yoog raws, thiab tiv thaiv kev puas tsuaj, tshuaj lom neeg, lossis kub.
Cov txheej txheem pib nrog kev npaj ntawm cov khoom siv polyurethane, uas feem ntau yog ob -cov khoom siv uas muaj cov polyol thiab isocyanate. Cov Cheebtsam no tau sib xyaw ua ke hauv qhov sib piv kom pib cov tshuaj tiv thaiv uas tsim cov polyurethane polymer. Tsis zoo li thermoplastic txhaj tshuaj molding, qhov twg cov khoom yog yaj thiab ces txhaj rau hauv pwm, polyurethane txhaj molding feem ntau muaj reactive molding. Qhov no txhais tau hais tias cov polymerization tshwm sim raws li qhov sib tov yog txhaj, tso cai rau kev kho sai thiab tsim cov khoom seem. Cov khoom siv sib xyaw siv hauv polyurethane txhaj tshuaj molding yuav tsum xyuas kom meej qhov sib txawv ntawm cov khoom kom tsis txhob muaj qhov tsis xws luag xws li npuas, voids, lossis kho tsis tiav.
Thaum cov khoom sib xyaw polyurethane npaj txhij, nws raug txhaj rau hauv pwm kab noj hniav nyob rau hauv kev tswj xyuas qhov kub thiab txias. Pwm siv nyob rau hauv cov txheej txheem no feem ntau yog ua los ntawm steel los yog txhuas thiab yog tsim los kom haum rau lub caij nyoog zoo ntawm cov khoom uas xav tau. Lawv kuj tseem tuaj yeem suav nrog cov yam ntxwv xws li cov cua txias lossis cov cua sov los tswj cov txheej txheem kho. Lub peev xwm los tsim cov ncauj lus kom ntxaws, siab - cov pwm precision tso cai rau cov tuam txhab tsim cov khoom nrog cov geometries complex, zoo textures, thiab nruj tolerances, uas feem ntau nyuaj rau kev siv lwm txoj kev molding.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev txhaj tshuaj polyurethane yog qhov dav ntawm cov khoom siv kho tshuab uas tuaj yeem ua tiav los ntawm kev kho cov qauv ntawm polyurethane. Piv txwv li, qhov nyuaj ntawm cov khoom kawg tuaj yeem tswj tau los ntawm qhov muag muag heev thiab hloov tau mus rau nruj thiab siab - lub zog. Qhov kev hloov pauv no tso cai rau cov kws tsim qauv tsim cov khoom siv rau cov ntawv thov tshwj xeeb, txawm tias nws yog rau kev poob siab - nqus cov khoom, cov ntsaws ruaj ruaj, gaskets, lossis cov khoom siv. Tsis tas li ntawd, cov khoom siv polyurethane muaj kev tiv thaiv zoo heev rau hnav, cuam tshuam, thiab tshuaj lom neeg, uas ua rau lawv tsim nyog rau qhov xav tau ib puag ncig.
Lwm qhov txiaj ntsig ntawm polyurethane txhaj tshuaj molding yog nws qhov ua tau zoo hauv kev tsim cov khoom ntim siab. Thaum cov pwm tsim, cov txheej txheem tuaj yeem rov ua dua nrog qhov sib txawv me me, kom ntseeg tau zoo ib yam ntawm cov khoom siv. Lub sijhawm kho sai ntawm polyurethane kuj tseem ua rau lub sijhawm luv luv piv rau cov txheej txheem thermoset molding. Qhov kev sib xyaw ua ke ntawm qhov tseeb, rov ua dua, thiab nrawm ua rau polyurethane txhaj tshuaj molding qhov kev xaiv zoo nkauj rau cov tuam txhab nrhiav kev tsim khoom thiab txo cov nqi.