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1、编号：毕业设计(论文)外文翻译（译文）学院：机电工程学院专业：机械设计制造及其自动化学生姓名：学号：指导教师单位：艺术与设计学院姓名：梁惠萍职称：讲师2012年5月15日TheEffectsofMoldDesignonthePoreMorphologyofPolymersProducedwithMuCell_TechnologyABSTRACT:InthisstudytwomoldsweredesignedandusedinMuCell_technologytogenerateimplantswithaporousstructure.Toarrivethedesiredporestructur
2、emanyprocessparameterswereinvestigatedforindicatingtheeffectsofprocessparametersontheporemorphology.Thisprocessparameterinvestigationwasperformedoneachmoldrespectively,sothattheinfluencesofthemolddesignontheporemorphologyhavebeenresearchedbythesameprocessparametersetting.Itwasfoundthatthemolddesigna
3、lsohadeffectsontheporestructureinMuCell_technology.Apropermolddesigncouldimprovethegeneratedporestructure,suchasporosity,porediameter,andinterconnectivity.KEYWORDS:molddesign,cellmorphology,MuCell_,injectionmolding,medicalimplant,porouspolymer,polyurethane.INTRODUCTIONMuCelltechnology,asaneffectivem
4、icrocellularinjectionmoldingprocess,iswidelyusedinautomobileandfurnitureindustries.Inmostcases,MuCell_technologyisusedtosaverawmaterials,butitisalsousedtoproduceimplantswithclosedporousstructure[1].ItusesCO2asblowingagent,whichisinjectedintheplasticizationsectionoftheinjectionmoldingmachine(Figure1)
5、.Theblowingagentisinjectedintothepolymermeltthroughthegassupplylineandinjector,initssupercriticalstate,bytheplasticizationphaseoftheinjectionmoldingmachine.Aftertheplasticizationthemixtureofpolymermeltandgasisinjectedthroughthenozzleintothemold,wherethefoamstructurecanbegeneratedduetothequickpressur
6、edropinthemold.ThemainproductswhichareproducedtodaywithMuCell_technologyhaveclosedcellularfoam[2–4].TheMuCellMicrocellularFoaminjectionmoldingtechnologyisacompleteprocessandequipmenttechnologywhichfacilitatesextremelyhighqualityandgreatlyreducesproductioncosts. TheMuCellProcessinvolvesthecontrolledu
7、seofgasinitssupercriticalstatetocreateafoamedpart.TheMuCellTechnologyistargetedatprecisionandengineeredplasticcomponentswithmaximumwallthicknessesoflessthan3mm.TheMuCellProcessgenerallyoffersa50-75%im
