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Product Code:SAE AIR1243
Title:Anti Blow-By Design Practice for Cap Seals
Issuing Committee:A-6c2 Seals Committee
Scope: This SAE Aerospace Information Report (AIR) provides information on anti blow-by design practice for cap-strip seals. Suggestions for piston cap strip seal sidewall notch design and other anti blow-by design details are also described. It also includes information on two key investigations based on the XC-142 as part of the text and as Appendix A.The purpose of this document is to provide adequate information to the designer so that the problem will not reoccur.
Rationale: This SAE Aerospace Information Report (AIR) provides information on anti blow-by design practice for cap-strip seals. Suggestions for piston cap strip seal sidewall notch design and other anti blow-by design details are also described. It also includes information on two key investigations based on the XC-142 as part of the text and as Appendix A.The purpose of this document is to provide adequate information to the designer so that the problem will not reoccur.【英文标准名称】:StandardTestMethodforMeasuringShrinkagefromMoldDimensionsofMoldedThermosettingPlastics
【原文标准名称】:模压热固性塑料的模型尺寸收缩的测量用标准试验方法
【标准号】:ASTMD6289-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008-04-15
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:1.1Thistestmethodisintendedtomeasureshrinkagefrommoldcavitytomoldeddimensionsofthermosettingplasticswhenmoldedbycompression,injection,ortransferunderspecifiedconditions.1.2Thistestmethodprovidesforthemeasurementofshrinkageofthermosettingplasticsfromtheirmoldsbothinitially(within16to72hofmolding)andastheyage(post–shrinkageatelevatedtemperatures).1.3Thismethodwillgivecomparabledatabasedonstandardspecimensandcannotpredictabsolutevaluesinactualmoldedpartswithvaryingflowpaths,wallthicknesses,pressuregradiantsandprocessconditions.Differencesinmoldshrinkagegenerallyisobservedbetweenthespecimengeometriesdescribedinthistestmethod.1.4Knowledgeoftheinitialshrinkageofplasticsisimportantfortheconstructionofmoldsandknowledgeofpostmoldingshrinkageisimportantfordeterminingthesuitabilityofthemoldingmaterialformanufacturingthermosettingplasticcomponentswithaccuratedimensions.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThistestmethodandISO2577-1984areequivalentwhenbarsof120mmlength,15mmwidth,and10mmthicknessareusedforcompressionmolding;orflat,squareplaquesapproximately120by120by4mmareusedforinjectionmolding.
【中国标准分类号】:
【国际标准分类号】:
【页数】:4P;A4
【正文语种】:英语