DMY00007ENmoss8006Word下载.docx
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DMY00007ENmoss8006Word下载.docx
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Hardness/stiffness
Brittleness
Burningmarks
”Silverline”
Scratches
Sidescratches
Shineerrors
Bubbles/splinters
Colourerror
Matcherror
Impurities
Remainsoflooseningmaterial
Refractionerror
Uniformityofouterappearance
Wearingofelectroerodedsurfaces
4.CAPTIONS
Thecaptionsmustcontain:
Captionexample
Thepurposeofthisstandardisto
.Describethequalityrequirementsindifferentqualityclasses.Italsocomprisessomeofthemostcommondefectswiththeircausessothattheycanbepreventedindesignandproductionphases.
.Makethecaptionsuniform.
Note1.QualityclassificationofsurfacesisdefinedinMOSS800/1.
.Suck
.Dentorbump
.Convex/concave
.Bent
.Twist
.Bursts
.Incompletecompression
.Jointseam/coldseam
.Feed-inmarks
.Flowingmarks
.Hardness/stiffness
.Brittleness
.Burningmarks
.”Silverline”
.Scratches
.Sidescratches
.Shineerrors
.Bumps/splinters
.Colourerrors
.Matcherror
.Impurity
.Remainsoflooseningmaterials
.Refractionerror
.Uniformityofoutersurfaces
.Wearingofelectroerodedsurfaces
Suck
Definition
Amoderatedentincoatingwithapossibleshinyarea.Itiscaused.bynon-simultaneouscoolingofpartswithdifferentthicknessesortooquickacooling.
Inspectioniscarriedoutvisually.
Requirements:
ClassI:
Nodefectsallowed
ClassII:
Moderatedefectsareallowediftheyarenoticeablethroughreflectiononly
ClassIII:
Defectscanbeallowediftheydonotdisturbassemblyoruse
Dentorbump
Agentle-edgeddeviationfromunbrokensurfacelevel.Itiscaused.bywronghandlinginproductionprocess..abumpcausedbyatoolwhenpressingthepartout.
ClassIII:
Dentsorbumpscanbeallowediftheydonotdisturbassemblyoruse
Convexityorconcavity
Thesurfaceiscompletelyconvexorconcave(dentorbump).Thisiscaused.byworkmethodormalfunctionoftool.
Inspectioniscarriedoutvisuallyorbymeasuring.
Minordefectsareallowed.Thetolerancesmustberespected
Canbeallowedifitdoesnotdisturbassemblyoruse
Bent
Thewholepartisbent.Thisiscaused.bywronghandlingincoolingphase.
ClassesIandII:
NodefectsallowedThetolerancesmustberespected
Twist
Partoftheobjectistwisted.Thisiscaused.bywronghandlingincoolingphase.
Nodefectsallowed.Thetolerancesmustberespected
Gentledefectsallowediftheyarenoticeablethroughreflectiononlyandtheydonotdisturbassemblyoruse
Bursts
Anextraburstofmaterialnotbelongingtothepart.Thisiscaused.byafaultytoolortheoverpressureusedincompression.
Gentleburstsallowediftheydonotdisturbassemblyoruseandtheydonotgetlooseinassemblyoruse
Incompletecompression
Theparthasnocompleteform.Thisiscaused.byinsufficientremovalofgases.
GentledefectsareallowediftheydonotdisturbassemblyoruseDefinitionismadebyreferencemodelsorinstructionsforincominginspection
Jointseam/coldseam
Aline-likecolourerror.Thisiscaused.byjointofcoldmaterialflows.
ClassIIandIII:
MinordefectsallowedifdurabilityisnotdecreasedThedurabilityhastobeprovedbytests
Feed-inmarks
Colourtonedifferencesrightbythefeedinpoint.Itiscaused.bywrongcompressionprocess.
Nodefectsallowed.
Minordefectsallowed.
Defectscanbeallowediftheydonotdisturbassemblyoruse.
Flowingmarks
Colourtonedifferencesinthesurface.Thisiscaused.bywrongcompressionprocess.
Inspectioniscarriedoutvisually.
Hardness/stiffness
Deviationfromthedefinedrawmaterialvalues.Thisiscaused.bywrongrawmaterialorthemixtureratio.
ClassesI,IIandIII:
Nodeviationallowed.
Note!
Captionofhardnessismarkedifneeded(especiallyincaseofsoftmaterials).
Brittleness
Deviationfrombreakingdurabilitydifferingfromthosedefinedfortherawmaterial.
Inspectioniscarriedoutbytesting.
Burningmarks
Sensitivitytoscratches.Thisshowsintonedifferences.Indifficultcasesthereareformdefects.Thisiscaused.byoverheatingofthematerialorbyold/recycledrawmaterial.
Inspectioniscarriedoutvisuallyorbyfeeling.
Minordefectsallowediftheydonotdecreasethedurability.Thedurabilitymustbeprovedbytests.
”Silverline”
Colourtonestripesordotsinthesurface.Thisiscaused.byevaporationofhumidityintherawmaterialorburntrawmaterial.
Minordefectsareallowedifthedurabilityofthepartisnotdecreased.Thismustbeprovedbytests.
Scratches
Defectedsurface.Thisiscaused.bywronghandling.
Minorscratch,whichisdefinedbyareferencemodel,canbeallowed.
Canbeallowed.
Sidescratches
ClassIandII:
Minordefect,whichisdefinedbyareferencemodel,canbeallowed.
Shineerrors
Deviationsappearingasshinyareasfromthedefinedroughnessofthesurface.Thisiscaused.bytemperaturedifferencesinmould.
Inspection:
Thisiscarriedoutbymeansofareferencemodeland/ordefinedmeasurementvalue.
Definitionisperformedbyreferencemodels,classesI,IIandIII.
Bubbles/splinters
Poresinsidetherawmaterial.Appearasdistortionintransparentparts.Thisiscaused.byevaporationofimpuritiesinrawmaterial.
Bubbles/splintersareallowediftheydonotaffectouterappearanceordurability.
Colourerror
Deviationfromdefinedcolourvalue.Atitsworst,thisiscausedbyuseofmixingmethod.
Colour,colourtoneandpattern
Theseareinspectedbymeansofapprovedreferencemodeland/oradefinedmeasurementvalue.
Nonoticeabledefectsallowedeitherwhencheckedvisuallyorwhenmeasured.Especiallythepartstobejoinedmustmatchcolourwise.
Nodisturbingdeviationsincolourallowed.
Matcherror
Partstobejoineddonotmatchtogether.Thisiscaused.bymoulddefectorwrongcooling.
Noerrorsallowed.Requirementlevelsaredefinedbymeansofreferencemodels.
Impurities
Impuritiescausedbyhandling,suchasdust,greaseandfingerprintsetc.
Impuritiesallowediftheydonotdisturbassembly,useorfinishingtouch.printing).
Remainsoflooseningmaterial
Remainsoflooseningmaterialappearasshinedifferencesorpatches.
Inspectioncarriedoutvisually.
Nosiliconbasedmaterialsallowed.
Refractionerror
Adistortionorshinecausedbydistortionorrefractionintransparentpart.Thisiscaused.bymoulddefects.
Definitionbyreferencemodels.
Uniformityofouterappearance
Deviationsfromtheuniformityofdifferentpartsinthesameentity.Thisiscausedby:
-toolingsteel
-qualityofelectrode
-arcmachiningapparatus
-sensitivityofstainsfromthemouldinrawmaterial
-injectionmouldingmachine
Deviationfromuniformityofouterappearanceisnotallowed.
ClassIIandIII
Agreeddeviationsallowed.
Wearingofelectroerodedsurfaces
Similardefectsasinitemsandcanbefound.Defectscanbecaused.bywronglychosenmouldrawmaterialorplasticrawmaterial.
Agreeddefectsallowed.
Defectsallowediftheydonotdisturbassemblyoruse.
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