Designation:D6289−13StandardTestMethodforMeasuringShrinkagefromMoldDimensionsofMoldedThermosettingPlastics1ThisstandardisissuedunderthefixeddesignationD6289;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodisintendedtomeasureshrinkagefrommoldcavitytomoldeddimensionsofthermosettingplasticswhenmoldedbycompression,injection,ortransferunderspecifiedconditions.1.2Thistestmethodprovidesforthemeasurementofshrinkageofthermosettingplasticsfromtheirmoldsbothinitially(within16to72hofmolding)andafteraging(post–shrinkageatelevatedtemperatures).1.3Thismethodwillgivecomparabledatabasedonstan-dardspecimensandcannotpredictabsolutevaluesinactualmoldedpartswithvaryingflowpaths,wallthicknesses,pres-suregradiantsandprocessconditions.Differencesinmoldshrinkagegenerallyisobservedbetweenthespecimengeom-etriesdescribedinthistestmethod.1.4Knowledgeoftheinitialshrinkageofplasticsisimpor-tantfortheconstructionofmoldsandknowledgeofpostmoldingshrinkageisimportantfordeterminingthesuitabilityofthemoldingmaterialformanufacturingthermosettingplas-ticcomponentswithaccuratedimensions.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThistestmethodandISO2577-1984areequivalentwhenbarsof120mmlength,15mmwidth,and10mmthicknessareusedforcompressionmolding;orflat,squareplaquesapproximately120by120by4mmareusedforinjectionmolding.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD796PracticeforCompressionMoldingTestSpecimensofPhenolicMoldingCompoun...
