Hauv compression molding, ob qhov sib txuam pwm ib nrab tau teeb tsa rau hauv xovxwm (feem ntau hydraulic), thiab lawv txoj kev txav yog txwv rau ib qho axis perpendicular rau lub dav hlau ntawm pwm.Kev sib xyaw ntawm cov resin, muab tub lim, cov khoom siv ntxiv, tus neeg sawv cev kho, thiab lwm yam yog nias thiab kho nyob rau hauv lub xeev uas nws puv tag nrho cov kab noj hniav ntawm molding tuag.Cov txheej txheem no feem ntau cuam tshuam nrog ntau yam ntaub ntawv, suav nrog:
Epoxy resin prepreg nruam fiber ntau
Daim ntawv molding compound (SMC)
Dumpling qauv khoom (DMC)
Bulk Moulding Compound (BMC)
iav lev thermoplastic (GMT)
Compression molding cov kauj ruam
1. Kev npaj cov khoom siv molding
Feem ntau, cov khoom siv hmoov los yog granular molding yog muab tso rau hauv kab noj hniav, tab sis yog tias cov khoom ntim loj, pretreatment feem ntau yog qhov zoo.
2. Preheating ntawm molding cov ntaub ntawv
Los ntawm cua sov cov khoom molding ua ntej, cov khoom molded tuaj yeem kho tau zoo ib yam, thiab lub voj voog molding tuaj yeem raug luv.Tsis tas li ntawd, txij li cov molding siab tuaj yeem txo qis, nws kuj muaj qhov cuam tshuam los tiv thaiv kev puas tsuaj rau cov ntxig thiab pwm.Cov cua kub cua tshuab ziab khaub ncaws kuj tseem siv rau preheating, tab sis high zaus preheaters yog dav siv.
3. Kev ua haujlwm molding
Tom qab cov khoom siv molding muab tso rau hauv pwm, cov khoom yog thawj softened thiab tag nrho ntws nyob rau hauv qis siab.Tom qab qaug zog, cov pwm raug kaw thiab nias dua los kho rau lub sijhawm teem tseg.
Unsaturated polyester thiab epoxy resins uas tsis tsim roj tsis tas yuav tso pa tawm.
Thaum degassing yuav tsum tau, lub sij hawm teem caij yuav tsum tau tswj.Yog tias lub sijhawm dhau los, cov roj tso tawm me me, thiab cov roj ntau yuav raug kaw rau hauv cov khoom, uas tuaj yeem tsim cov npuas rau ntawm qhov chaw molding.Yog tias lub sijhawm lig dhau lawm, cov roj tau ntim rau hauv cov khoom kho ib nrab, nws nyuaj rau kev khiav, thiab tuaj yeem ua rau tawg ntawm cov khoom molded.
Rau cov khoom tuab-walled, lub sijhawm kho yuav ntev heev, tab sis yog tias qhov kev kho tsis tiav, cov npuas yuav raug tsim tawm ntawm qhov chaw molding, thiab cov khoom puas yuav raug tsim vim deformation lossis post-shrinkage.
Post lub sij hawm: Apr-15-2021