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1、______屆學(xué)生畢業(yè)論文（設(shè)計(jì)）存檔編號(hào)：__________畢業(yè)論文外文翻譯題目：MP3后蓋注射模設(shè)計(jì)與模具制造工藝編制系部：機(jī)電與建筑工程專業(yè)：材料成型及控制工程姓名：丁勇學(xué)號(hào)：201103030222指導(dǎo)老師：張倩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
