ASTMDy5888m075753000404039mSiTbDesignation:D958-88AMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceSt.,Philadelphia,Pa.19103ReprintedfromtheAnnualEookofASTMStandards.CopyrightASTMIfnotlistedinthecurrentcombinedindex,viillappearinthenextedition.StandardPracticeforDeterminingTemperaturesofStandardASTMMoldsforTestSpecimensofPlastics'ThisstandardisissuedunderthefixeddesignationD958;thenumberimmediatelyfoliowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(E)indicafesaneditorialchangesincethelastrevisionorreapproval.1.ScopePROCEDUREUSINGTHERMOMETER1.1ThispracticecoverstwooptionalproceduresfordeterminingthetemperatureconditionofstandardASTMmoldsfortestspecimensofplasticsbymeansofeitherathermometerorapyrometer.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesaregivenforinforma-tiononly.1.3Thisstandardmayinvolvehazardousmaterials,oper-ations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D647PracticeforDesignofMoldsforTestSpecimensofPlasticMoldingMaterials2D957PracticeforDeterminingMoldSurfaceTempera-tureofCommercialMoldsforPlastics2E1SpecificationforASTMThermometers33.SignificanceandUse3.1Thepropertiesofmoldedpartsandtheeaseofproducingsatisfactoryspecimensareinfluencedbythetemperatureofthemold.Itisdesirabletoknowtheactualmoldtemperaturewhichmaybedifferentfromthemoldtemperaturecontrolmedium.3.2Theusershouldbeawareoftemperaturedifferencesacrossthemold/thermocoupleinterfaceandatleadsandshouldtakeprecautionstominimizesuchdifferences.4.Molds4.1RequirementsforthedesignofstandardASTMmoldsfortestspecimensofplasticsarecoveredbyPracticeD647.5.Apparatus5.1Thermometer-A76-mm(3411.)immersion,mer-cury-filledther...
