金屬粉末注射成形工藝參數及澆口尺寸對流動性能的影響

1、中南大學碩士學位論文金屬粉末注射成形工藝參數及澆口尺寸對流動性能的影響姓名：許靜靜申請學位級別：碩士專業(yè)：機械設計及理論指導教師：蔣炳炎20040101ABSTRACTABSTRACTThispaperisconcemedwiththefluidityofV，Ni—Fef爸edstockinthePowerInieclionMolding(PIM)bydiscussingthefeedstocknow1en昏handtheresearc

2、hedflujdityisa任毫ctedmainlybythedepthdimensionofthegateandthetechn0109icparametersthemainresearchapproachjsmakinguseoftheMI’I(MoldflowPlasticsInsi曲t3，1)simulationsonwareandexperimentationsFor印plyingthesimulationsoRwareoft

3、heplasticinjectionmoldingtothePIMthecharaccerpafameCerSandthebestViscosi哆modeloftheW—Ni—FefeedstockwerediscussedinthispapeLInthedatabasesoftheMPIsoRware，theparametersdataofthisPlMfeedstockthatweneedinPIMflowsimulationwer

4、eextended，whichprovidea譬ooddevelopmentfortheapplicationoftheMIPsimulationsoRwareinthePIM廳eldARertheMPIsimuIationandhundredsoftheexperimentsandtestsf0Ilowin2thedesignedschemes，thebasicIawt11atthegateandthetechnologicparam

5、etersa艉ctthefluiditywasfoundbydrawin垂theirrelationcurvesMytestresearchworkisasfoIIows：①’rherelationofthedepthdimensjonsoflhegateandlheflowlengthisn‘lIinear’theH—Lcurveisobviouswave；②lntheresultsofthesimulationandtheex口er

6、iment，theH—Lcurvehasthetendencythatwiththeincreasingofthedepthdimensionoftheg貳e，theflowlengthincreasewaViIywhentheinjectionpressurechangedandtheolherconditionsstillareinVariabIe，atthes帥etime，thed印thdimensionsoft11egategi

7、veaveragelysixvaluesbetween05mmand21mmThegatedimensionofthelongesIflowIengthis18mm，③Comparedwiththeinjectionpressure，theef|lectsthatfeedstocktemperatureandtheinjectionVeIocitya何’ecttheHLcurvearesmalleL④Astothetechnologic

8、parameters、^menthedimensjonofthegateisjnVariabiethe竹owJengthjncfeasedwithfhejncreasingofallofthetechnologicparameterssuchasthei11jectionpressure、theiqjectionvelocity、thefeedstockand山emoIdtemperaturesIncreasingtheinjectio

9、npressureandthe刪s幻cktempemturehavechesamee腩ctofgoiflguptheflowlengch⑤Th∞u曲analyzingtheresultsofsimulationandtest，wefoundthatthedifferencebetweenthemissmalLthesimulationandtes【canbecomDaredKeywords：PIM；W_Ni’Fef色edstock；th