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首页 塑胶模具设计

塑胶模具设计.ppt

塑胶模具设计

t00126
2011-11-23 0人阅读 举报 0 0 暂无简介

简介:本文档为《塑胶模具设计ppt》,可适用于工程科技领域

塑膠產品設計PlasticPartDesign徐昌煜CharlesHsu就傳統射出成形而言實用的最小壁厚在到mm之間。如果要採用更薄的壁厚卻又缺乏實際的經驗可以借助CAE作科學的決定。Forconventionalinjectionmolding,apracticalminimumwallthicknessisintherangeoftommWhenthinnerwallsarerequiredbutactualexperienceisabsent,theminimumpossiblethicknesscanbescientificallydeterminedbyCAE壁厚WallThickness壁厚不均是注塑成形中最大的麻煩製造者。這對薄壁零件尤然。這些麻煩包括了遲滯現象、短射、凹陷、發赤、噴流、翹曲及長冷卻時間等目前都可用CAE以直接或間接的方式預測。NonuniformwallthicknessisthebiggesttroublemakerinplasticinjectionmoldingThisisespeciallytruetothinwallpartThetroubles,includinghesitation,shortshot,sinkmark,blush,jetting,warpageandlongcoolingtimeetc,canbepredicted,directlyorindirectly,byusingCAE壁厚不均NonuniformWallThickness設計高收縮率材料成型品時設計者應將壁厚變化限制在。就低收縮率材料而言許容壁厚變化可到。Whiledesigninginjectionmoldedpartsinhighmoldshrinkagefactormaterials,thedesignershouldtrytolimitwallthicknessvariationtoTheallowablewallthicknessvariationforthelowmoldshrinkagefactormaterialscanbeupto壁厚不均NonuniformWallThickness壁厚設計WallThicknessDesign掏空設計()CoringOutDesign()掏空設計()CoringOutDesign()外側凸轂OutsideBoss空洞或和凹陷的形成VoidorandSinkMarkForming肋厚和內圓角半徑的影響TheEffectofRibThicknessFilletRadius突出件和公稱厚壁相交處的內圓角半徑太大會致使凹陷、空洞、殘餘應力和長的冷卻時間。該內圓角半徑太小會致使應力集中。一個好的折中方案是採用公稱壁厚的作為內圓角半徑。Alargefilletradiuscausessinkmark,void,residualstressandlongcoolingtimeAsmallfilletradiuscausesstressconcentrationAgoodcompromiseistousearadius,whichisofthenominalwall(NW),atthejunctionoftheNWandaprojection內圓角半徑FilletRadius肋的底部厚度BottomThicknessofRib肋的設計(一)RibDesign()肋的設計(二)RibDesign()角板設計(三)GussetDesign()與側壁相連之凸轂(熱塑性塑膠)BossatWall(Thermoplastics)遠離側壁之凸轂(熱塑性塑膠)BossAwayFromWall(Thermoplastics)WallThickness,RibConventionaltoin(tomm)Thinwall:toin<in(tomm)(mm)WallThickness,BossesConventionaltoin(tomm)Thinwall:toin<in(tomm)(mm)WallThickness,GussetsConventionaltoin(tomm)Thinwall:toin<in(tomm)(mm)突出件在和公稱厚壁相交處的建議厚度:以高縮水率的結晶性塑膠而言可採用公稱壁厚的。以低縮水率的非結晶性塑膠而言可採用公稱壁厚的。Therecommendedthicknessatthejunctionofaprojectionandthenominalwall(NW)isoftheNWthicknessforhighmoldshrinkage,crystallinematerialsThelowermoldshrinkagefactor,amorphousplasticscanhavethicknessesofuptoofthepart’sNWthickness突出件壁厚ThicknessoftheProjection有些情形在美觀的考慮下是不容許些微凹陷的。設計者應當考慮將建議厚度減少。Inthosecaseswhereaestheticconsiderationsprecludeevenaslightsinkmark,adesignershouldconsiderreducingtherecommendedribthicknessbyanadditionalpercent突出件壁厚ThicknessoftheProjection從成型容易的觀點來看突出件的高度以產品公稱壁厚的到倍為宜。Fromaneaseofmoldingperspective,theheightofprojectionsshouldbelimitedtototimesthepartnominalwallthickness突出件高度HeightoftheProjection強固的、脆的、剝蝕性的、黏的塑件要有大的脫模角和光滑的拋光。軟的、延展性的、和光滑的塑件則可有小的脫模角。Largedraftanglesandasmoothpolisharerequiredforpartsmoldedinstrong,brittle,abrasive,andstickymaterialsSmallerdraftanglescanbeusedonsoft,ductile,andslipperymaterials突出件脫模角DraftAngleoftheProjection以成本和可製造性的觀點理想的脫模角是消費者可以接受的前題下最大的角度。就多數情況而言每邊°應已足夠但°或°可以更好。模穴應順著開模方向打光。Theidealdraftangle,fromacostandmanufacturabilityperspective,isthelargestanglethatwillnotdistractfromtheconsumer’sacceptanceoftheproductInmostcases,°persidewillbeadequate,but°or°persidewouldbebetterThecavitiesthatformprojectionsshouldbedrawpolished突出件脫模角DraftAngleoftheProjection距離應大於產品公稱壁厚的倍。使得模具鋼材具備足夠的強度以抵抗彎曲並且提供足夠的吸熱器以免產生凹陷和成型應力。Thisdistanceshouldbeatleasttimesthepart’snominalwallthickness,sothemoldsteelprovideenoughstrengthtoresistbendingandenoughheatsinktoavoidsinkmarkandmoldedinstress突出件和側壁突出件的距離TheDistancebetweenProjectionandSideWallProjection撓曲剛性FlexuralRigidityYoung’sModulus,ETheratiobetweenstressandstrainisconstant,obeyingHooke’sLaw,withintheelasticityrangeofanymaterialThisratioiscalledYoung’smodulusandismeasuredinMpaorpsi平板和肋板的比較ComparisonbetweenPlainRibbedPlates和平板比若基於相同的慣性矩(剛性)肋板需料少了IA卻增加了倍。肋板的最大厚度減為平板的使得冷卻時間驟降()。Basedonthesamemomentofinertia(stiffness),ribbedplateneedslessmaterialbutboostIAbytimescomparingwithplaneplateThemaximumthicknessofribbedplateisonlyofplainplate’sshowingadramaticcoolingtimereductionof()平板和肋板的比較ComparisonbetweenPlainRibbedPlates應力比(肋無肋)StressRatio(RibbedUnribbed)偏移比(肋無肋)DeflectionRatio(RibbedUnribbed)結構設計是薄殼成形零件的基礎。Structuraldesignisthebaseofthinwallmoldingparts薄殼成形零件不僅僅是一趨勢而且也是降低成本和提高競爭力的有效途徑。Thinwallmoldingpartisnotonlyatrendbutalsoaneffectivewaytoachievecostreductionandcompetitivenessincrease結構設計和薄殼成形零件StructuralDesignThinwallMoldingPartsLivingHingeDesignforPPandPE:(a)before,and(b)afterBendingºTypicalValuesofLivingHingeDesignforPPandPE:(a)MostApplication(b)SelfopeningHingeDesignMostCommonLivingHingeDesign:(a)before,and(b)afterBendingºRecommendedLivingHingeDesignwiththeNeutralAxisintheCenter:(a)before,and(b)atBendingAngleofºCrossSectionthroughtheEntireHingeShowingItsPrincipalDimensionsCrossSectionofaPortionofaLivingHingeDesignandItsNeutralAxisPositionHingeDesignDetail:(a)asMolded(b)asAssembled“RightWay”AssemblyHingeDetailCableIgnitionBracketAxonometricViewCableIgnitionBracketSideViewCableIgnitionBracketTopViewHingeDetail:(a)InitialDesign(b)ImprovedDesignHingeBehaviorafterAssemblyPOLYPROPYLENEHINGEDESIGNNOTES:‘Y’DIMPERPARTDESIGN‘X’DIM=YPOLYPROPYLENEHINGEDESIGN孔Holes以射出成型而言圓孔形狀理想原因是塑料冷卻時它收縮到心型銷若銷為圓形應力會均勻的分布在圓銷面上。RoundholesaretheidealshapefortheinjectionmoldingprocessThereasonforthisisthatasplasticmaterialcoolsitshrinksontothecorepinthatformsaholeand,withroundholes,thestressisuniformlydistributedaroundit孔Holes這一尼龍風扇因安裝孔的直線孔緣末端的鎖入應力而損毀。Thisnylonfanfailedduetomoldedinstressattheendofthestraightsectiononthemountinghole孔Holes孔Holes最初此一玻纖補強的尼龍計時鏈輪中央的方型驅動軸孔有四個銳角。使用幾個月後這些鏈輪從方孔的銳角到其附近的鏈輪齒根產生裂隙而報廢。後來在方孔的四個角落加了向外延伸的小孔之後鏈輪便不再開裂。TheglassfiberreinforcednylontimingsprocketswereintroducedwithsharpcornersonthesquaredriveshaftholeThesesprocketsfailedafterseveralmonthsinthefieldduetocracksradiatingfromacorneronthesquareholetotherootofanearbygeartoothThesefieldfailureswereeliminatedbyaddingtheoutwardlyextendingradiuses孔Holes內圓角和向外延伸的內圓角(B,C,D)可以減低鎖入的應力並且使得產品變強。Insideandoutwardlyextendingradiuses(B,C,D)reducemoldedinstressandresultinastrongerpart孔Holes孔A和B能以簡單直接開模的方式成形孔C則須要一較複雜的側向運動心型方能成形。HolesAandBcanbemoldedwithasimple,straightopeningmoldHoleCrequiresamorecomplexsideactingmold從易於成型的觀點來看相鄰二孔緣的距離或是孔緣和產品邊緣的距離至少要有壁厚的兩倍而絕對不可小於壁厚。Fromaneaseofmoldingperspective,thedistancefromoneholetothenext,ortotheedgeofapart,mustbeataminimumtwotimesthepart’swallthickness,andneverlessthanthepart’swallthickness孔Holes孔Holes圖中的孔太靠近產品的邊緣塑料的收縮使得該孔和其周圍的薄壁都因之扭曲。TheholeshownhereistooclosetotheedgeofthepartShrinkageoftheplasticmaterialhasdistortedthisholeandthethinwallaroundit孔Holes(FigureI)孔Holes圖I的盲孔A的長徑比應以:或:為限。形成圖I穿孔B的心型銷的自由端是頂在母模面上。這樣的心型銷獲得支持而長徑比可增加到:。ThelengthtodiameterratiooftheblindholeinFigureI(A)islimitedtoonly:or:ThethroughholeBinFigureIallowsthefreeendofthecorepintobeseatedagainstthecavityThissupportsthecoreandallowsitslengthtodiametertobe:孔Holes如圖I的C所示將型心延伸至母模側的配合孔可以提供額外的支撐兩頭支撐的型心銷的長徑比可達:。如圖I的D所示以二支型心銷成型深孔可以消除型心銷和母模面的磨耗。這種方法產生的孔也可有:的長徑比。Telescopingthecoreintoamatingholeinthecavity,CinFigureI,providesadditionalsupportAcorepinanchoredatbothendscanhavealengthtodiameterratioof:Moldingadeepholewithtwocorepins,DinFigureI,eliminateswearbetweenthecorepinandthecavityHolesproducedinthismannercanalsohavea:lengthtodiameterratio塑膠工業協會(SPI)指定種拋光從鑽石高度拋光到噴砂粗度拋光。依照SPI模具拋光指南來指定表面光滑度已經被國際接受。TheSocietyofthePlasticsIndustry(SPI)specifiedfinishes,rangingfromahighdiamondpolishtoarough,blastedsurfaceTheSPIMoldFinishGuidehasbecometheinternationallyacceptedforspecifyingsurfacefinishes表面光滑度SurfaceFinish如果型心形成的內面沒有拋光頂出力和循環時間都會相應增加。Ifthecorethatformstheinsidesurfacesisnotsmoothlypolished,theejectionforcesandthecycletimewillincreaseaccordingly表面光滑度SurfaceFinish只在成型品頂出方向拋光可以消除側凹。這種拋光方法被稱作“抽拋”。設計工程師應於零件須要最小或脫模角時指定抽拋。PolishingthemoldonlyinthedirectionthatthemoldedpartmovesduringejectioneliminatestheseundercutsThispolishingtechniqueiscalled“drawpolishing”Designengineerswouldbewelladvisedtospecifydrawpolishingonpartsrequiringminimalornodraftangles表面光滑度SurfaceFinish無論模面如何光滑低密度聚乙烯都無法產生和聚苯乙烯接近的光亮外表。補強料加得多的塑料不能有效的產生光亮的外表。一般說來熱模較之冷模較能產生光滑的外表。保壓不足的產品無法忠實的複現模面的光滑。Regardlessofthefinishonthemold,lowdensitypolyethylenecanneverproducetheshinyappearanceofapolystyrenepartHeavilyfilledorreinforcedpolymercannotreliablyproduceshinysurfacesGenerallyspeaking,ahotmoldwillproducebettersurfacesthanacoldmoldApoorlypackedoutpartwillnotfaithfullyreplicatethemoldpolishonallofthepartsurfaces表面光滑度SurfaceFinish最軟的聚乙烯和聚氯乙烯、polyurethanes和某些熱塑性elastomers有沾黏高度拋光金屬面的傾向。這類黏的材料一般較易從粗糙面或輕度噴砂面脫模。Thesoftestpolyethylenesandpolyvinylchlorides,polyurethanes,andsomethermoplasticelastomershaveatendencytoadheretohighlypolishedmetalsurfacesStickymaterialsofthistypewillnormallyreleasebetterfrommoldingsurfaceswithmatteorlightlyblastedsurfacefinish表面光滑度SurfaceFinish強壯而又有些彈性的塑膠像聚丙烯、ABS和耐衝擊聚苯乙烯較之剛而脆的材料如一般用途用聚丙烯和壓克力更能接受粗略拋光的模面。對這些硬而脆的材料抽拋是非常有益的。Strongbutsomewhatflexibleplastics,suchaspolypropylene,ABS,andimpactstyrene,aremoretolerantofroughlypolishedmoldingsurfacesthanrigid,brittlematerials,suchasgeneralpurposestyreneandacrylicsDrawpolishingisverybeneficialwiththesehard,brittlematerials表面光滑度SurfaceFinish不能指望產品設計師、模具製造者以及拋光公司知道所有不同塑料的癖性。然而我們可以倚賴塑料供應商和有經驗的成型者他們知道那一種模面光滑度適合那一種特定的塑料。Productdesigners,moldmakers,andpolishingcompaniescannotbeexpectedtoknowtheidiosyncrasiesofallofthedifferentplasticmaterialsPlasticmaterialsuppliersandexperiencedmolderscan,however,bereliedupontoknowwhatmoldfinishisoptimalforagivenmaterial表面光滑度SurfaceFinish有些工業界的內行者估計拋光代表了模具平均成本的。這個平均值當然會有明顯的差異這要看模具的尺寸和形狀、金屬的硬度、要求拋光的程度、以及拋光前模面的光滑程度。Someindustryinsidershaveestimatedthat,ontheaverage,polishingcanrepresentofamoldoverallcostThisaveragewillobviouslyvary,dependingonthesizeandshapeofthemold,thehardnessofthemetal,thelevelofpolishrequired,andhowwellthemoldwasfinishedpriortopolishing表面光滑度SurfaceFinish對不透明件而言大多數消費者無法分辨SPI指南中最高三級光滑度的分別SPI的最高二級光滑度應為可以看穿的透明件保留。換言之為何要花錢在消費者無法感激的表面光滑度上?MostconsumerswillnotnoticethedifferencesbetweentheSPIGuidethreehighestfinishesonanopaquepartThetwobestSPIfinishesshouldbereservedfortransparent,seethroughpartsInotherwords,whyspendmoneyonasurfacefinishthattheconsumercannotappreciate表面光滑度SurfaceFinish產品圖上必須標明表面光滑度高度建議參照SPI模具光滑度指南。ThesurfacefinishmustbeclearlyindicatedonthepartdrawingItisstronglyrecommendedthatsurfacefinishbespecifiedaccordingtoSPIMoldFinishGuide表面光滑度SurfaceFinish一般說來成本或交貨期會隨著決定採用電火花加工法、噴砂法和照相化學腐蝕法的順序而增加。所有方法都能供給不同程度的表面花紋。較細的花紋像編織物或風乾木材的紋理只能靠照相化學腐蝕提供。Generallyspeaking,thecostanddeliverytimeincreaseswiththedecisiontogofromEDM’ingtoblastingtoPCE’ingAllthreetechniquescanprovidevaryingdegreesofmattefinishesThemoredetailedfinishes,suchasfabricorweatheredwood,areavailableonlywithPCE’ingNote:PCEisPhotoChemicalEtching表面花紋Pattern根據經驗法則對母模側模壁(冷卻時塑料從其離開)而言每mm咬花深度單邊至少要有°脫模角。有些咬花供應商要求在公模側模壁(冷卻時塑料向其包裹)提供倍的脫模角。安全的作法是避免在内面採用咬花。Theruleofthumb,appliedtothesidewallofcavitiesthatthematerialshrinksawayfromasitcools,isaminimumof°ofdraftpersideforeachmm(inch)oftexturedepthSometexturesuppliersaskfortwiceasmuchdraftoninsidesurfaces,thatthematerialshrinksontoasitcoolsAsaferapproachistoavoidusingtextureoninsidesurfaces咬花Texture設計者必須指出咬花從那裏開始到那裏結束。一個好的咬花標註應該指出花紋號碼、咬花深度、咬花位置如果要更得當的話還要加上花紋的方向。當一產品是由數件零件組合而成一定要指出咬花花紋的方向。ThedesignermustindicatewherethetexturestopsandstartsAgoodtexturingnoteshouldindicatethepatternnumber,depthoftexture,itslocation,andifappropriatethedirectionofthepatternInthoseinstanceswhereseveralpartsfittogetherinoneproduct,thedirectionofthetexturepatternabsolutelymustbespecified咬花Texture設計者完成產品設計之前能做的最重要的單一事項就是會同專業的咬花供應商作專案檢討。Thesinglemostimportantthingthatadesignercandotooptimizetheuseoftexturingistoreviewtheprojectwithaknowledgeabletexturesupplierbeforefinalizingthepartdesign咬花Texture半結晶塑料的收縮率較高這些塑料因在平行和垂直於熔膠流動方向有著不同的收縮率而多了一層問題。這問題又因成型條件改變致使結晶度變化而更形複雜。如果塑料冷卻得慢結晶度和收縮率都會增加。ThesemicrystallineplasticshashighermoldshrinkagefactorsThesematerialshavetheadditionalproblemofdifferentshrinkagefactorsparalleltoandperpendiculartothedirectionofmeltflowThisproblemisfurthercompoundedbyvariationsinthedegreeofcrystallinitycausedbychangesinmoldingconditionsIfthematerialiscooledslowly,therewillbeanincreaseincrystallinityandmoldshrinkage收縮Shrinkage非結晶塑料收縮率低較易維持尺寸的複現性。發表的收縮率是以mm(吋)的壁厚為準。ItiseasiertomaintaindimensionalreproducibilitywithlowmoldshrinkagefactoramorphousmaterialsThepublishedmoldshrinkagedataisbasedonamoldedpartwithamm(inch)wallthickness收縮Shrinkage設計射出成型零件當塑料收縮率高時應試圖限制壁厚變化在之內。當塑料收縮率低時許容壁厚變化在以內。Whiledesigninginjectionmoldedpartsinhighmoldshrinkagefactormaterials,thedesignershouldtrytolimitwallthicknessvariationstoTheallowablewallthicknessvariationforthelowmoldshrinkagefactormaterialscanbeupto收縮Shrinkage塑膠模具設計PlasticMouldDesign徐昌煜CharlesHsu模具設計的優先順序PrioritiesofMouldDesign澆注系統設計(FillingSystemDesign)排氣系統設計(VentingSystemDesign)冷卻系統設計(CoolingSystemDesign)脫模系統設計(EjectingSystemDesign)澆注系統設計FillingSystemDesign徐昌煜CharlesHsu澆注系統設計的優先順序PrioritiesofFillingSystemDesign產品設計(PartDesign)型腔設計(CavityDesign)澆口設計(GateDesign)流道設計(RunnerDesign)豎澆道設計(SprueDesign)噴嘴設計(NozzleDesign)典型的澆注系統TypicalFillingSystem每增加一個澆口至少增加一條熔接線同時增加一個澆口痕跡、增加流道的體積以及增加較多的積風。Everytimeonegateisadded,oneweldline,atleast,onegatemark,morerunnervolumeandmoreairtrapswillbeadded在型腔能夠完滿充填的前提下澆口數目是愈少愈好。Aslongasthecavityisabletobefilledappropriately,gatesarethelessthebetter為了減少澆口數目每一澆口應就塑流力所能及的流長壁厚比之內找出可以涵蓋最大零件面積的進澆位置。Inordertoreducethenumberofgates,eachgateshallbelocatedatwherethemeltisabletocovermaximumpartareabasedonthelargestmeltflowlengththicknessratio澆口數目TheNumberofGates熔膠波前推進MeltFrontAdvancement充填模式,積風和熔接線FillingPatterns,AirTrapsandWeldLinesLocation熔接線WeldLines更改澆口位置以重新定位熔接線WeldLinesCanBeRelocatedByChangingGateLocation典型對頭熔接線伸張強度保留值TypicalButtWeldTensileStrengthRetentionValues熔接線冷料井WeldSlugWell熔接線WeldLines熔接線WeldLines當波前相遇後繼續一塊兒流動如此產生的熔接線是動態的。這樣的線條也稱作熔合線。熔接線形成後熔膠不再流動如此產生的熔接線是靜態的或是對頭的。靜態的熔接線位於型腔的末端一般比靠近澆口的動態的熔接線脆弱而且明顯。Whentheflowfrontsmeetandcontinuetoflowtogether,theresultingweldlineisreferredtoasdynamicThistypeofweldlineisalsocalledameldlineWeldlinesthatareformedwithnoadditionalmeltflowarereferredtoasstaticorbuttweldlinesStaticweldlineslocatedattheextremitiesofacavityarenormallyweakerandmoreobviousthandynamicweldlinesformedclosetoagate左邊澆口在這些窗葉的中央產生了靜態的熔接線。Thegatelocatedontheleftsidecreatesstaticweldlinesinthemiddleoftheselouvers熔接線WeldLines熔接線WeldLines這一部分充填的產品顯示了兩條靜態的熔接線在外面二孔外產生澆口位於產品上邊中央。ThispartiallyfilledpartshowstwostaticweldlinesbytheoutsideholesThegateislocatedatthecenterofthepart,nearthetop積風AirTraps排氣Vent流動平衡FlowBalance熔膠波前於同一時間抵達型腔各末端。Meltfrontreachestheendsofcavityatthesametime洗衣機圈板洗衣機圈板冷氣通風飾罩原始設計AirconditionerGrille,Originalgatespressure:MPa冷氣通風飾罩更正設計AirconditionerGrille,Revisedgatespressure:MPa分析結果比較ComparisonofAnalysisResults十二澆口設計GateDesign四澆口設計GateDesign電子零件置物箱四澆口和十二澆口設計比較表論語‧季氏第十六不患寡而患不均不患貧而患不安。孔子如何快速平衡多型腔模之塑流HowtoBalanceFlowsInAMulticavityMould一排支流道之不平衡充填UnbalancedFlowInABranch一排支流道平衡後之充填BalancedFlowInABranch型腔模之不平衡充填UnbalancedFlowInACavityMould型腔模平衡後之充填BalancedFlowInACavityMouldTherunnersystemshowsthatwarmer,lowviscositymaterial(yellowandred)followstheinsidewallwhenthemeltsplitsatanintersectionMelt”Flipper”剪切速率ShearRate剪切應力ShearStress澆口種類GateTypes導致平直製件的澆口設計GateDesignforFlatPart澆口設計(減少滯流效應)GateDesigntoAvoidHesitation秒時遲滯現象在mm厚凸片處發生幫浦零件(Part,Pump)塑料(Polymer):POM公稱厚度mm沒有遲滯現象幫浦零件(Part,Pump)塑料(Polymer):POM澆口設計(避免凹陷和空洞)GateDesigntoAvoidSinkMarkVoid噴流Jetting使用沖擊型澆口以避免噴流AvoidJettingbyUsingImpingementGate使用沖擊型澆口以避免噴流AvoidJettingbyUsingImpingementGate使用凸片澆口以避免噴流AvoidJettingbyUsingTabGate使用適當的澆口形狀以避免噴流AvoidJettingbyProfilingGateProperly幫浦零件(Part,Pump)塑料(Polymer):POM進澆處(Polymerentrance):澆口厚(Gatethickness)mm型腔厚(Cavitythickness)mm問題(Problem):噴流(Jetting)PoorDesignCausingJettingGate氣輔射出成型冰箱把手閥式澆口ValveGate閥式澆口梢ValveGatePin加熱管HeaterO型環#""Ring流道歧管模板ManifoldPlate軸封環SealRetainer套筒軸封SleeveSeal枕塊SupportPillar油壓缸HydraulicCylinder閥式澆口(一)ValveGate()全部閥式澆口同時打開時之充填狀況Moldfillingwithallthevalvegates(shutoffgates)openedatthesametime閥式澆口(二)ValveGate()部份閥式澆口延遲打開改變充填模式Moldfillingwithdelayedvalvegateopeningfillingpattern,weldlinesandairtrapsarechanged多澆口設計MultigateDesign閥式澆口ValveGate矩形邊緣澆口設計RectangularEdgeGateDesign扇形澆口設計FanGa

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