注塑成型介绍

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1、注塑成型介绍10/4/20211成型機台的選擇成品重量及成型條件決定機台噸數若小零件在大機台將造成不必要的材料滯留時間過長14“&15”Base,Top:450噸14“LcdCover&Bezel:350噸10/4/20212材料預先乾燥在成型前務必確定材料有預先烘乾,以確保成品外觀及材料流動正常通常PC+ABS烘乾時間3~4小時10/4/2021310/4/2021410/4/20215成型控制條件10/4/20216成型問題與對策短射(ShortShot)毛邊(Burr)融接線(WeldLine)凹陷(SinkMar

2、k)翹曲(Wrap)銀紋(SilverStreak)流痕(FlowMark)10/4/20217短射(ShortShot)Thisisthephenomenonthatbecauseresinisnotheatedenoughinthecylinderormoldingtemperatureandinjectionpressurearelow,resingetscoldandhardbeforeresinisnotfilledinthecavity.10/4/20218短射(ShortShot)10/4/20219短射(

3、ShortShot)10/4/202110毛邊(Burr)Thisisthephenomenonthattheresinflowsintothejoiningpointofthedieandismolded.Iftheburrappearseveryshot,itmaycausethedamageofdie.10/4/202111毛邊(Burr)10/4/202112毛邊(Burr)10/4/202113融接線(WeldLine)Weldlineisthepatterofthinlinethatappearsonthep

4、ointwheretheflowofresinsmeets.Resintemperaturelowerswhenresinmeetagainaftertheypartincavity.Itmakesresinfussunperfectlyandweldlineappearsonhesamepointofbothside.10/4/202114融接線(WeldLine)10/4/202115融接線(WeldLine)10/4/202116凹陷(SinkMark)Whenthemoldedproductgetscool,th

5、ecenterpartdoesgraduallybuttheoutsidequickly.Sotheresinispulledtowardtheoutsidewherevolumerinksquicklyandthehollowsappearonthesurfacetobehardtocool.10/4/202117凹陷(SinkMark)10/4/202118凹陷(SinkMark)10/4/202119翹曲(Wrap)Inmanycases,thedesignoffinalproductcausesthewarpof

6、moldedproduct.Ininjection,highpressureisputontheresinindieandinsidestressoccurs.Ifyouquickengettingcool,insidestressincreaseandthewarpoccurseasily.10/4/202120翹曲(Wrap)10/4/202121翹曲(Wrap)10/4/202122銀紋(SilverStreak)Itisthephenomenonthatsilversstreakappearsinthedirec

7、tionofresin-flow.Beforevolatilizationcontentsintheresindischarges,resinsolidifiesandbecomesilverstreak.10/4/202123銀紋(SilverStreak)10/4/202124銀紋(SilverStreak)10/4/202125Itisphenomenonthatthestripepatternofannualringsappearscenteringaroundthegate.流痕(FlowMark)10/4/2

8、02126流痕(FlowMark)10/4/202127流痕(FlowMark)10/4/20212810/4/20212910/4/20213010/4/20213110/4/20213210/4/20213310/4/20213410/4/20213510/4/20213610/4/20213710/4/2021