外文翻译丁勇

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1、______届学生毕业论文（设计）存档编号：__________毕业论文外文翻译题目：MP3后盖注射模设计与模具制造工艺编制系部：机电与建筑工程专业：材料成型及控制工程姓名：丁勇学号：201103030222指导老师：张倩2015年2月15日Basicknowledgeof mold(1) productmould referstotheuseof itsown specificshapetotheshapeofa certainshapeandsizeofthe tool.Plasticproducts plasticmold referstotheuseof itsown sp

2、ecificshapetotheshapeofacertainshapeandsizeofthe tool.(2) classification ofplasticmolding die1, injectionmolding (injectionmold, injectionmolding)2, extrusion die (extrusiondie, die)3, thepressingmold (mold, film)4, diecasting mold (die)5, hollowmold (hollowdie)6, vacuum and compressingairmold

3、ing mould(3) whatarethefactorsthatinfluencethe dimensionprecisionofplasticparts?Theerror causedbyfluctuations of1 mouldmanufacturing precision error causedbythe 2weardegree causedbythe plasticshrinkagerate of 3Error errorcausedby installationerror of4 mold 5mold gapcausedbythe movingparts(4) i

4、fthe plasticparts wallthicknessdifference istoolarge, usewhatmethodto decreasethewall thicknessdifferenceThe plasticparts canbetaken toothick part hollowed or plasticparts intomultiple piecesofplastic and combinedmethodto decreasethewall thicknessdifference.(5) draft design pointsof howtolabel

5、?1 highprecisionplasticparts, theuseofsmaller draftPlasticparts2 dimensions ishigh, theuseofsmaller draft3 plasticpartsshape iscomplexandnoteasyto demould, selectionoflarge inclination4 reinforcedplastics usingrelease agreaterangleof5 largeshrinkage, slope increaseLubricantcontaining plastic w

6、ithasmaller draftAnnotation: shape asbig asthebenchmark, slope direction obtained bynarrowIn ashapewiththe smallend benchmark, slopefrom expanding direction made(6) plasticproduct characteristics?Uniformwallthicknessof thethinnerwall(7) thedesignofplasticproducts shouldpayattentiontoconsider w

7、hatfactors?Theforming process of the1 rawmaterials physicalandmechanicalpropertiesof the2 rawmaterials of3 plasticpartsoftheshape shouldbeconduciveto mold type exhaust fillplasticandcoolingTheprocessingtechnology of wholestructureand mo