1、CO1.DSHUTMAINCAUSErMetaIisfrozenwhentwometa1.frontsjoin.DEFECTTYPE1 .欠铸主要经由：在填充型腔前金属液凝或金屈液浇注不足。SHORTFI1.1.MAINCAUSESiMetaIisfrozenbeforethecavityis111.dorbyinsufficientmu1.being1.ad1.d.2 .冷隔主要缘由：两股金属液交接时金属液凝固。起皮主要缘由：由于增压不良和/或浇口、浇道设计不好.产生金属制化皮.SCA1.INGMAINCAUSES:1.ayersofmeta1.ndoxidescanbecreatedbyp
2、oorshotndcontro1.and/orbadgatoandrunnerdsign.4.气泡主要缘由；开模旧铸件还没完全凝固，残留在钵件中压缩气体膨胀而导致气泡,B1.ISTERMAINCAUSErTrappedgasesareinthecastingwhenthdiisopndwhnthcasting1$sti1.1.wk.Tisa1.1.owsthecompressedgastoexpandandCaU1.eb1.ister.5.飞边主要缘由：在行腔最终填充时铸件投影面区域金属液压力太高，一股压力穿过分里践，缩模力不鲂.模具涨开，金属液逃逸.F1.ASHMAINCAUSE:MouJp
3、ressureiscoohighupontheprojectedsurfacearea(facingthep1.attens)ofthecastingattheendofcavityfi1.1.Thiicreatesaforceacrosstheparting1.inewhichistoogreatforthec1.ampingforceofthmachine.Thedieisthenforcedapartwhicha1.1.owsmeu1.escape.6.铸点铸点在铸件表面用肉品可以清晰望见.主要缘由：金M液在乐室过分冷却.金属固体微粒被压入型腔.CO1.DF1.AKESMAINCAUSE
4、zMeuIIsi1.1.owedtocoo1.coomuhIntheshots1.ev.Thso1.idpartk1.sarethenInjectedintothecavity.Thsf1.akesaroftenc1.ear1.yvisib1.eonthesurfaceofthecastingwiththenakedeye.7 .压射润滑油油污主要缘由；压射润滑油运用过多OSHOT1.UBESTAINMAINCAUSEzThisdefectoccurswhentoomuchshot(tip)1.ubisused.8 .气孔主要缘由:铸件中残用来自各种缘由的气体.压铸参数不好,排气、溢流系统或浇
5、口、浇道设计不好.AIRPOROSITYMAINCAUSESrThisdfctiscausedbytrappedairinchcastingwhichcancom。fromsevera1.sources.1.tcabcausedbypoorshotendcontro1.poorventingandoverf1.owfunctionorbadgatingandrunnrdesign.9拉伤主要缘由：拔模斜度不够或表面凹陷，在顶出时产品灰面被破坏，可通过变更铸件顶出时潮度来改善.模具表面粗糙度不好是另个缘由。DRAGMARKSMAINCAUSEJnsufnn.24 .断裂铸件主要缘由：开模时或恃件
6、顶出时铸件中的裂纹可导致机械破坏.这包括热裂和缩孔,也包括热脆.CRACKEDCASTINGMAINCAUSES:AcrackinthcastingcanbecausedbymChankaJdamagewhenthedieisopenedorwhentheactingisejected.Thisc1.assificationexc1.udesHOTCRACKING&crackingatthsurfacedutoSHRINKAGEPOROSITY.A1.so.chsdefinitionexc1.udesHotshortness.25Micrographsupp1.iedbyStephenThompsonMainRfrencDICastingDfectsNorthAm11cnDioCastingAssociation.IW7.CDROMverskn1.
