Stratasys Objet350 - Page 220

Objet350 User Guide 7 Handling Printed Models
DOC-17001 Rev.G 7-3
•ForSUP705,afterbreakingawayexcesssupportmaterial,soakthemodel
ina1%causticsodasolution(see"RemovingSUP705withCausticSoda"
onpage7-3).
•ForSUP706,afterbreakingawayexcesssupportmaterial,soakthemodel
ina2%causticsodaandsodiummetasilicatesolution(see"Removing
SUP706withCausticSodaandSodiumMetasilicate"onthenextpage).
Removing
SupportMaterial
withWater
Pressure
Formostmodels,themostefficientwaytoremovesupportmaterialisby
usingahigh-pressurewaterjet.OnesuitablesystemistheBalcoWaterJet
cleaningunit.
Figure7-1BalcoWaterJetCleaningUnit
Tocleanamodelusingthisdevice,youplaceitinthechamber,andyou
manipulateitandthejetusingthebuilt-in,waterproofsleeves.Apumpturns
ordinarytapwaterintoahigh-pressurejet,andawiperkeepsthewindow
clear.
Usecautionwhencleaningdelicatemodelswithhigh-pressurewater
systems.
Removing
SUP705with
CausticSoda
Soakmodelsina1-percentsolutionofcausticsoda(sodiumhydroxide)to
removesupportmaterialfromdifficult-to-reachareasandtogivethemodela
smooth,cleanfinish.Theamountoftimeyousoakthemodelinthesolution
dependsonhowdelicateitisandhowmuchsupportmaterialneedstobe
removed,butitistypicallybetweenhalf-an-hourandseveralhours.Inany
case,youshouldremoveasmuchsupportmaterialaspossiblebeforethe
causticsodatreatment,andrinsethemodelthoroughly(withawaterjet)
afterwards.
Warning
Causticsodamaycausechemicalburns,scarringandblindness.Mixingit
withwatergeneratesheatthatcouldigniteothermaterials.Neverpour
waterintocausticsoda.Whendilutingthesolution,alwaysaddcaustic
sodatowater.Takeadequatesafetyprecautions;alwaysusenitrile
gloveswhenhandlingcausticsodaandmodelssoakedinit.