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ID:44397829
大小:1.01 MB
页数:44页
时间:2019-10-21
《塑料注射成型工艺基础[1]》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、塑料注射成型工艺基础内容提要注射工艺过程注射压力填充模式浇注系统与流道平衡冷却系统应力、收缩与翘曲常见的注塑缺陷CAE软件应用指南Co-injectionmoldingFusiblecoreinjectionmoldingGas-assistedinjectionmoldingInjection-compressionmoldingLamellar(microlayer)injectionmoldingLive-feedinjectionmoldingLow-pressureinjectionmoldingPush-pullinjec
2、tionmoldingStructuralfoaminjectionmoldingProcesscycleImportanceofprocessconditionsResindatatableGenericNameMeltTemperature(C/F)MoldTemperature(C/F)Min.Rec.Max.Min.Rec.Max.ABS200/392230/446280/53625/7750/12280/176PA6230/446255/491300/57270/15885/185110/230PC260/500305/58
3、1340/64470/15895/203120/248PET265/509270/518290/55480/176100/212120/248PMMA240/464250/482280/53635/9060/14080/176POM180/356225/437235/45550/12270/158105/221PP200/392230/446280/53620/6850/12280/176PS180/356230/446280/53620/6850/12270/158PVC160/320190/374220/42820/6840/10
4、470/158SAN200/392230/446270/51840/10460/14080/176Temperature-timecurveatvariouslocationsinthemoldScrewpositionsatvariousstagesCycletimeanditscomponentsRequiredmoldopeningDeterminationofthegate/partfreezingtimePressuredecreasesalongthedeliverysystemandthecavityFactorsinf
5、luencinginjectionpressurerequirements(I)VariableHigherinjectionpressurerequiredLowerinjectionpressurerequiredPARTDESIGNPartthicknessPartsurfaceareaFactorsinfluencinginjectionpressurerequirements(II)VariableHigherinjectionpressurerequiredLowerinjectionpressurerequiredGAT
6、EDESIGNGatesizeFlowlengthFactorsinfluencinginjectionpressurerequirements(III)VariableHigherinjectionpressurerequiredLowerinjectionpressurerequiredPROCESSINGCONDITIONSMelttemperaturePartsurfaceareaRamspeedFactorsinfluencinginjectionpressurerequirements(IV)VariableHigheri
7、njectionpressurerequiredLowerinjectionpressurerequiredMATERIALSELECTIONMeltflowindexInjectionpressureasafunctionMeltfrontadvancementsMelt-frontvelocityandmelt-frontareaFiberorientationsVariationofMFABasicrunnersystemlayoutsCommonlyusedrunnercrosssectionsEquivalenthydrau
8、licdiametersRunnerdiameterchartEffectofrunnerlengthHotrunnersystemtypesFillingpatternsresultingfromvariousinje
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