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外文翻译--新型注射成型技术.doc

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外文翻译--新型注射成型技术.doc

外文文献Itisthenewtypeinjectbyshapingtechnology1.injectbyshapingaltogetherinjectshapingofatcorelayersAdoptandinjectshapinghelpandobserveandmakeoneuniquestructurealtogether.firstofplasticisinjectedandfillandentersometypesfirst,thentheplasticsecondfollowfirstinjectpersonwhoenteroneandkeepinitialtodrivepressurefieldofflowingclosely.Atepidermisdistrictandcorethesizesofone,measureandpublishfirstandthematerialsquantitiesofsecondaccordingtocorrectproportionaterelationship,Makeoneatfirstcompleteatsecondtomakeoneparcelappearancecoreeach.Inaddition,incosmeticsapplication,thematerialisputaftersecondmaterialinjectingtohavefirstofepidermisofthesmallpart,Sothattheepidermisofthepartoftherunnercanbetotallyclosed.Injectmakingoneofshapingaltogetherwiththeresinof2kindsofdifferentcolors,formapieceofalayerofblocksofepidermisandcoreapttodistinguishRealizeinjectshapingoneasmuchasallhaveandhaveandoneverymuchimportantthiscoresimilarepidermis.Ifthereisnotadvanceddetectiontechnique,usuallydifficulttodistinguishtheepidermiscoreareaandboundaryoflayer.Injectshapinganewtechnologyaltogether.Britishicicompanybegantousethistechnologyinthe1970searly,andhadmadethebasictheoryofincluding,Produceseveralpatents,suchastheproductsandmachineryequipment,etc..Nowsimilartomouldmouldsandwicheswhathasbeenadoptedgenerallyiciproductiontechnologies,lastouterthematerialsoftheepidermisatmouldsandinlayersismaterialdifferentoncoreoccasionally,Sotwoakindofmaterialpersonwhoacertainoneinclusives,andcorerequireandhavehighradiationsvery,issueandsteepshapingandretrieveperformanceofutilizingetcat100bylayersofmaterial.Shouldbefixedrelativelybytheexcellentchoicetoselectthematerialforuse.Afterinjectingtheshapingtechnologyandcomeoutin15altogether,canreallyjustpopularizeandpopularize.Oneakindofadoptionsinjectthethickteethofshapingfailsandproduceshorizontalcrosssectionaltogether.Materialtopacknylonepidermis,andpearlmaterialpackthenylonatglasslayersofmaterialcore.Aratethatshrinksmaterialofpearlofglassisextremelylowincoreone,havegoodsizestabilities.Nylonpreventpearlfromgrainsofmaterialeasyproblemofdenudingthatproducesbyepidermispersonwhogivegoodandlubricatedtoothtoothgearwheel.Alreadydevelopedseveralkindsandprocessedthemethodofimprovingnewtyplyatpresentonthebasisofthebasictheoryofinjectingshapingaltogether.Athowever,inthemouldandgasassistpaintmouldmould.Mouldhaveandpaintprocessingmethodtoadoptlowmolecularweightpolymersastheoutermaterial,Gasassistmouldmouldshapingtoadoptthenitrogenoranotherkindofgasasthecoreoneorcoreonesmaterial.Produceandprocessequipmentconstanttoperfectandimprove,satisfyofdifferentusenewlyandthenewtechnologiesdemandswithproductdesign,Injecttechnologyandwillbecometherichandpotentialindustrializedextensiveproductiontechnologymethodaltogether.2.injectbyitcompressshapingInjectandcompressshapingmoveperpendicularondividingintomouldlinedirectionbymediumsizedsofwallsat.Adoptthemethodattheshaping,fillmouldstageandproducepressuredrivemeltingbodyflowaccordingtoprocess,Butthisflowedthedegreeofdepthofonemeltedvariably.Atflowingonedeeplyrelatively,pressuredroprelativelylow,sothatheavyareasmakepiecesofshapingexcessivetopigeonholemeltingbody,Andhaspreventedthematerialinthetwinklingofaneyefromresponding,these2kindsoffactorswillhindertheflowofthemeltingbodyequally.Itinjectsformingprocesstypemakepiecesofthe14softhicknessfinallybysofdegreeofdepth,Aftertheplastichasbeenpacked6075ofthetyperoughly,stopinjecting,aofwallsofmouldisbulldozedatthesametime,Untilmakethewalloriginalshapingofonefinally.Thefinalsizeofmakingoneisdefinedatthisstage.Ifatmouldwallatprocessfullingofmoretypebeforemoving,thiskindoftechnologyisusuallycalledandcastandpressshaping.Onthewhole,castandpressshapingtoadoptpressurethatbecometomakingonegoonandprotectandpigeonholeinoneapieceofvariablethetypeonesofvolumeses.Castandpressstagetoincreasethestagesofdensity,densityandtheninlyingbetweenandsolidstateplasticchangemeltingbody.Adoptandcastandpresswayshapingprepressingdiscs,remainingstressdegreeofminimising,Makepiecesofhaveremainstressproduceandbecomephenomenonofrefracting.Itcastandpressshapingimprovementtypeactivitiestypestypesforkindsofnewtechnologyinsofwalls,injectitsmake.Alreadysomeonecalloutsidegastoassistshapinglawthemethod,actuallytheseareakindofmisunderstanding,Becausethegashasnotinfluencedthemeltingbodyflowintypeofplastic.Duringroutineinjectshaping,protectingandpressiswhileaofvolumeofkeepingtypedoesnotchange,Underthefunctionthatthepressureflows,addandentermoreplastics.Unite,Beingemergedbytherunnerpositionofthehighpressureandmakingadefectprobably.3.computerssupplementaryshapingAdoptcomputerassistprojectcaedesignandanalyseandhelpandshortendesigncycleandpreventcostfromexpensivemechanicalfaultprocessing.Commercialemulationsdailytoindicatesizeonflowingonecode,meltmaterialflowsinflowingdishesofsystemandtypewithbalance,Thefigureofoffereddingandputbestlyandrunnerdefiningrunneratthesametime.Calculatepressureofinjectingandshutmouldwantatdifferentprocessingtermsandmaterialfixbytonnage.Andwarpingratecombineinitialtoflowintotooveryaccuratetoestimateoutpersonwhoshrink.Whatisimportantisandwantandmakethedesigntoolhelpandanalysepersonnelprocessandgoontheoperationjudgedwhilestudyingorinacertainplanofdesignskillfully.Understandatresultsandcantprocessinorderthatitisbyresearchobject/materialsfromprerequisite.Afterconsideradoptingthiskindofmethodaccuratedatain,canmakeenormousbenefit.Inaddition,economicmakedesigncyclenottobeshortandneedsproduceshortertimetheanalysis.Theonethatshouldpointoutis,commercialcaeproceduresusuallycantbeuseddirectly.Itfillsandimitateandproducevaluableexperiencebuttheresultmustrethinkitslimitationtoestimateagain.Usemoderncomputersgoonandinjectshapingsimulatedtestandlimitedtopureviscidityfluidsonlyincludethemeltingplasticofviscoplasticity.Oneactualflowformmeasurablemeltingbodypersonwhoflowintoesandperformanceannounceetc.structurebyspeed,Ifcancarryontheviscoplasticityanalysisofhighaccuracy.Atpresentadoptanyothertoprocesswayreachthisadvancedcompetences,Andrecentyears,atemulationtheindustrialcirclepersonwhotaketheleadsofequipmentandtheresearchgroupsofuniversityalreadymadegoodprogress.Haveseveralaofcompaniesmakegreateffortsandprobeemulationtechnology,inordertobebeabletobebeingexplainedmouldingthesexinstinctactandprocessthephenomenonofmorerealitycorrectly.Forexample,gettogetherontheinfluencethattheorientationofthepossessivechainisdistributedtosomephysicsperformanceandperformance.Processingphysicsisverycomplicated,butsomeviscoplasticityisembodiedtooaliketostilltotallyunderstood,Perfecttherationalprocessingwayandtakingshapeslowatpresentevenmore.Thesestrongerstrongwayswillbeexceededtheproductioncapacitythatwillbedesignedatpresentgreatly.4.reversalinjectshapingComparativelyspeaking,itisthatarelativelynewinjectshapingchoosesparametersthatthereversalisinjected.Thegreatestdifficultpointofthistechnologyislaininwhenprocessingtheconditionsuddenlychangeses,Tothethingthatitwillbeknownlittleaboutwhatkindofchangebehaviorplasticmeltingbodywilldemonstrate.Abouttherudimentaryknowledgeofmeltingbodyrheology,isnotmerelytheregularshear.Sayexactly,themeltingbodyrespondstheviscidityandelasticbehaviorthecharacteristicneedingexpressing,Notonlycommonstablestateflowspeedorshearspeedandtemperature,butalsoincludingpressureandflowthespeedinthetwinklingofaneye.Thesecharacteristicsincludingalotofcontentandverydifficulttounderstand.However,ifnotinheterotypicmaterialsinjectrespectmakesubstantiveprogress,needandmakeandpublishmanykindsofdifferenttheconcreteoperationalproceduresofplasticses.Needandincreaseaincommonuseonetiredtotryonlawisinordertogettingripeandaccuratecontrolmethodalsoanother.Duringroutineinjectshaping,thetypeimmobilizesinaofwalls,somesituationsareleft,Stillutilizeandfillingonthemouldandprotectandpressandfallsectionandmovethemouldwall.Canadopt2kindsofdifferentmethodsPersonwhomovesofperpendicularondividingintomouldlinedirectionwallRotateaofwallsoftheslippingtype.Fillstagerotatorytypecoreswithincreasingmould.Throughthiskindofprocessingtechnology,thecrookedperformanceandothermechanicalperformanceofmakingonehasgottengreatimprovement.Polyphenyldrinkthewaterandpolypropylenesyringeadoptcuptheprocessingmethodgetgreattochangeandbreakthroughtheground2apieceofproductsjustbysecond.新型注射成型技术1.共注射成型(芯层注射成型)采用共注射成型有助于观察到制件中独特的结构。塑料甲先注射充入部分型腔,然后塑料乙紧跟着甲注射进入型腔并保持初始推动流动压力场。根据表皮区和芯层的尺寸大小,按正确的比例关系计量出甲和乙的用料量,可制得1个内芯层为甲外表完全由乙包裹的制件。另外,在化妆品应用方面,有小部分的表皮甲料放在乙料之后注射,以使浇口部分的表皮能完全闭合。用2种不同颜色的树脂进行共注射成型的制件,形成一个容易区分的表皮和芯层区间(认识到所有的注射成型件中存在有类似的表皮和芯层这一点非常重要。)如果没有先进的检测技术,通常难以区分表皮芯层的区域及其分界面。共注射成型并非一门新的工艺技术。英国ici公司早在70年代就开始应用这一技术,并取得了包括基础理论,生产产品及机器设备等几项专利。现普遍采用的ici生产工艺类似三明治模塑,由于模塑外层表皮的材料与中间或芯层的材料不同,因此两种材料必须有一定的相容性,并且芯层材料要求具有可高度辐射、发泡成型和100回收利用等性能。选用材料应经多种选择比较而定。共注射成型工艺问世15年后,才真正得以普及推广。一种采用共注射成型的厚齿输制作横截面。表皮材料是非填充尼龙,而芯层材料是玻璃珠料填充尼龙。芯层中玻璃珠粒料收缩率极低,具有良好的尺寸稳定性。尼龙表皮赋予齿轮齿牙良好的润滑性并避免了珠粒料容易产生的磨蚀问题。基于共注射成型的基础理论目前已开发出几种新型加工改进方法。例如,模内上漆和气体辅助模塑成型扩大了采用这种工艺的范围。模内上漆加工方法是采用低分子量聚合物作为外层材料,而气体辅助模塑成型是采用氮气或另一种气体作为芯层(或部分芯层)材料。随着产品设计与生产加工设备的不断完善改进,将满足各种新应用和新技术的需求,共注射技术必将成为富有潜力的工业化大规模生产工艺方法。2.注射压缩成型注射压缩成型中型腔壁移动方向垂直于分模线。采用这种方法成型时,在充模阶段,按工序产生压力驱熔体流动,但这一个流道的深度是可变化的。在较深的流道中,压力下降得较低,以使大面积的制件成型中熔体没有过度受压,并避免了瞬间的材料响应,这2种因素同样会阻碍熔体的流动。注射成型过程中,型腔深度可能是最终制件厚度的14,在塑料填充了大致6075的型腔后,停止注射,模腔壁周围同时受到推压,直至最终制件的壁原成型为止。制件的最终尺寸在这阶段确定。

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