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简介：Numericalsimulationofinjectionmoldinghavehadsuccessinpredictingthebehaviorofpolymermeltinextremelycomplicatedgeometries.Mostofthecurrentnumericalsolutionsarebasedonfinite-element/finite-difference/boundary-element/volume-controlmethodsandthesurfacemodel.ThispaperdiscussesthedevelopmentofanintegratedCAEsystemforinjectionmoldingindetail,andpresentsthemathematicsfornumericalsimulationoffilling,packing,cooling,stressandwarpageininjectionmolding.ThedevelopedsystemnamedasHsCAE3Disintroducedattheend.

简介：Thispaperpresentsourrecentexperimentalinvestigationonthefeasibilityofmonitoringthefrothmolding,aspecialcaseofsolidificationprocess,ofpolyurethanebyusingelectricalcapacitancetomography.Themajorchallengeistheextremelylowsoliddensityofthesolidifiedmaterialduringtheprocessduetotheverylargeexpansionratio.Suitablecalibrationmethodissoughtandadequateimagereconstructionalgorithmisappliedforsuchatask.Differentexpansionmodeshavebeenobservedduringexperimentandcorrespondingimagesreconstructed.Thisvisualizationtechniqueclearlyrevealedtheexpansionprocessbyatimeseriesofimagesofthesoliddensity.Thetestresultsprovedthecapabilityofelectricalcapacitancetomographyinmonitoringtheexpansionofpolyurethane.Futurewaysforimprovementarealsosuggested.

简介：Forthepurposeofreducingthevolumetricshrinkageandvolumetricshrinkagevariation,theprocessininjectionmoldingofasphericplasticlenswassimulated,andseveralprocessparameterswhichincludeholdingpressure,melttemperature,moldtemperature,filltime,holdingpressuretimeandcoolingtimewereoptimizedbyusinganorthogonalexperimentaldesignmethod.Finally,theoptimumprocessparametersandtheinfluencedegreeofprocessparametersontheaveragevolumetricshrinkageandthevolumetricshrinkagevariationareobtained.

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简介：Thispaperisconcernedwiththenumericalsimulationoftheinjectionmoldfillingprocess.AmathematicalmodelbasedongeneralizedHele-Shawflowforaninelasticnon-Newtonianfluidundernonisothermalconditionsisused.Ahybridnumericalschemeisemployed.Thenumericalsimulatingre-sults,pressureandtemperatureprofile,locationofthemeltfronts,areinagoodagreementwiththeex-perimentalones.

简介：Theeffectofpressdirectiononthethermalexpansion,slagresistance,etc.ofpericlase-spinel-carbonbrickhasbeenstudiedinthisarticle.Theresultsshowthatthetherma1expansionrateinthedirectionparalleltothepressaxisislargerthanthatinthedirectionperpendiculartothepressaxisandtheslagresistanceinthedirectionparalleltothepressaxisismuchbetterthanthatintheperpendiculardirection.Thedirectionaldistributionofgraphiteinthespecimenisobservedwiththemicroscope.

简介：AlSiCp(65vol.%原文如此)电子包装材料被塑造的粉末注射(PIM)和压力渗入过程生产以便获得近塑造网的部分。泉华pre过程在1150K获得的SiCppreformed协议高有力量和好外观，和到全部的孔的开的孔的比率是将近98%。composites的相对密度比99%大。这个方法制作的AlSiCpcomposites的热传导性是198W.m?1.K?1，并且热扩大(CTE)的系数是8.0x10?6/K(298K)。

简介：Liquidcompositemoulding(LCM)processesareusedtomanufacturehighqualityandcomplex-shapedcompositepartsintheautomotive,marine,aerospaceandcivilindustries.On-linesensingplaysanimportantroleincontrollingthequalityofthefinalproductintheLCMmanufacturingenvironment.Thelong-periodfibergrating(LPG)technology,anewreal-timefiberopticsensorsystem,wasdevelopedtomonitortheflowfrontprogression.Thesensoroperationandcharacterizationundervariousprocessconditionswerediscussedindetail.TheexperimentalresultsshowedthatLPGsensorswererobustandreliabletodetectthearrivalofresinatpre-selectedlocationsinstructureswithlow-mediumfibervolumefraction;howeverwerelimitedatdifferentdepthsinstructureswithhighfibervolumefraction.

简介：高密度聚乙烯(HDPE)的薄墙样品经由注射塑造，不同注射速度从100mm/s到1200mm/s被准备。在张力的力量和幼仔模量的重要减少与增加注射速度被观察。为了在这后面调查机制，减少，取向，分子的重量，分子的重量分发，融化流动率，crystallinity和水晶HDPE的形态学用二维的宽角度的X光检查衍射(2D-WAXD)被描绘，胶化浸透层析(GPC)，毛状的电流测定和微分扫描热量测定(DSC)分别地。这被表明取向，分子的重量，分子的重量分发，融化流动率和crystallinity没与增加有明显的变化注射速度。不过，扩大的链晶体的内容或大合拢的链晶体被发现与增加注射速度减少。因此，在张力的性质的减少被扩大的链晶体或大合拢的链晶体的减少的内容主要贡献，这被结束。这研究为高速度注射塑造的申请向工业提供珍贵信息。

简介：形态学和机械性质(ethylene-octene)poly，注射塑造的动态收拾行李获得的共聚物(POE)被机械测试调查，微分扫描热量测定(DSC)，fourier变换红外线的光谱学(英尺红外)和扫描电子显微镜学(SEM)。机械测试与低octene内容和高分子的重量表演发现那仅仅POE明显的反应为外部砍地。进一步的调查被DSC，英尺红外，和SEM做了以便弄明白那现象的原因。最后，POE微观结构形成在下面的假想机制砍地被建议了。为有低octene内容和高分子的重量的POE，取向度和机械性质两个都实质地增加在下面砍地。为有低octene内容和低分子的重量的POE，取向度和crystallinity增加在下面砍地，而是它不是戏剧性地为机械性质受益。为有高octene内容和高分子的重量的POE，shear地在形态学和机械性质上有小效果。