钣金喷塑工艺规范Sheet metal spraying process specification文档格式.docx
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钣金喷塑工艺规范Sheet metal spraying process specification文档格式.docx
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Two.Pretreatment
1.,spraypaintingistheproductafterinspectionqualified,semi-finishedproductssurfacecoverage,rust,corrosionprotection,beautifulandbeautiful,andhas
Functionofsign.Priortopaintingandspraying,pretreatmentmustbecarriedout,andnecessaryoverallinspectionshallbemadebeforeprocessing
Trim.
Fig.2.flowchartofpretreatmentprocess
1)degreasing-2)degreasing-3)firstwash-4)secondtimeswaterwashing-5)tableadjustment-6)phosphating-7)
Thirdtimeswashing-8)fourthtimeswashing-9)purewaterwashing
3.pretreatmentprocessandparameters
order
Number
Processname,processmethod,treatment,liquidtreatment
time
(SEC)
Handle
temperature
C
Intervallength
BeforeLi
Liquidzone
Totalleachateareaaftertreatment
1predegreasingspraydegreasingagent>
6050-602000400017007700
2degreasingspraydegreasingagent>
6050-60800400017006500
3firstwashsprayindustrialwater>
30RT800150017004000
4,secondwashingsprayindustrialwater>
30RT800150036005900
5tableadjustmentspraytable40-45RT3600150017006800
6phosphatingsprayphosphatingagent60-18035-45800450017007000
7,thirdwashingsprayindustrialwater>
30RT800150011003400
8,fourthwashingsprayindustrialwater>
30RT700150011003300
9purewashspraydeionizedwater30RT700150020004200
Total48800
Supplementarynotes
Predegreasing:
Tankvolume:
3.5cubicmeterstemperature:
50--60DEGCtime:
nolessthan60secondspressure:
0.1-0.2Pa
Mixingtank:
addwatertotheworkingsurfaceof3/4.Afterheatingtotheworkingtemperature,openthespraysystem.Afteraddingchemicals,addwaterto
Workingsurface.Addedperton:
20KG,Parco,cleaner,1523R,degreasingagent,2KG,Parco,cleaner,1523S
activeagent
Controlpoint:
freebase:
7--15,ML,totalbase/freebase:
lessthan2.5,pre-degreasing,everyadditionalpointshouldbeadded:
Parco
Cleaner,1523R,3.5kg,Parco,cleaner,1523S,0.7kg
Dischargecycle:
fullloadrunningfor8weeks.
Degrease:
lessthan2.5,predegreasing,everyadditionalFC-4328A,degreasingagent4.5
Kg,freealkalinityincreasedby1points,adjustedtotheworkindex,youcanheatup
Firstwash
1.5cubicmeters,temperature:
roomtemperature:
notlessthan30seconds,pressure:
0.4Pa,bathliquid:
tapwater
pHvaluelessthan9
1weeks
Secondwash
Tableadjustment:
notlessthan45seconds,pressure:
1.0Pa
Waterqualitycontrol:
pHvalue7.5--9.5
adjust1kgtablewithdeionizedwaterandmix,addwaterof3/4inthetank,turnonsprayingsystem.Mixthemixture
Addthetankslowlyandaddwatertotheworkingsurface.
Emissioncycle:
8--10hours
Phosphating
Volumeoftank:
3.5cubicmeters,temperature:
40--45DEGC,time:
1--3minutes,pressure:
1.0Pa,totalacid:
20--36(ML),
Freeacid:
0.6--0.9(ML),acceleratornumber:
1.4--0.7(ML)
add3/4ofwatertothephosphatingtankandheatto40--45DEGC.Addchemicalsinthefollowingorder:
1,BONDERITE910Mu150KG.
2,Grano,Starter,6540kg.
3,Accelerator131,1.3L
4,Additive311,40kg
5,Additive3159,kg
Remark:
Accelerator131andGranoStarter65shouldbedissolvedinwaterfirstbyvolumeratioof1:
2.JoinBonderite910RA
Canincreasethetotalacidityalittle.
Thirdwash
pHvalue6.0-7.0
Fourthwash
pHvaluelessthan7
Purewaterwashing
4.qualityofphosphatingfilm
Aftertreatmentbythismachine,shouldformalayerofdensephosphatingfilmonthesurfaceoftheworkpiece,delicatetexture,uniform,nothreadbarephenomenon,suchasto
Lowernationalstandards:
GB6807-86"
technicalconditionofphosphatingtreatmentbeforecoatingofironandsteelparts"
SurfacecorrosiongradeandderustinggradeofironandsteelbeforeGB/T8923-88coating
EvaluationofsurfaceroughnessgradeofsteelbeforeGB/T13288-91coating
GB/T13312-91ancestrymethodforoilremovalbeforecoating
TechnicalconditionsforphosphatingtreatmentofGB6807-86ironandsteelworkpiecebeforecoating
Threedusting
1.checkandclearallthepowersupplylinesandspraygunbeforecleaningtheworkpiece.Makesurethatthepowerlineofthegunisingoodcontactwiththenozzlewhencleaningthespraygun
Yes,whetherthepowdersupplylineisclearwiththenozzle),cleanthepowderroomandthepowdersupplybarrel
2.addpowderpowdertothepowderfeedingbucket.Switchonthepowerswitch,openthepowderblower,andturnonthecompressedair
3.switchontheelectrostaticgenerator,checkwhetherthepartsareworkingnormally,andadjustthevoltageandthecompressedairpressuretotheworkingtargetrange
Inside,thenopenthesprayguntotestspray
4.job:
(1)holdthegun,makethemuzzleofthepowderroomtestspray;
(2)accordingtothecharacteristicsoftheworkpiece,adjusttheamountofpowderoutofthesprayguntoensurethequalityofthecoating;
(3)whenthejobisdone,thespraygunisfacingtheworkpieceandkeepsthesprayguntothesprayingsurfaceat150-200mm.Duringthesprayingprocess,thespraygunishorizontalorvertical
Theprincipleofstraight,uniform,rectilinearmotionperformsoperations
(4)visuallyinspectthesprayingconditionsothatthesurfaceoftheworkpieceiscompletelycoveredwithpowder;
(5)thestructureiscomplex.Theworkpieceshouldbesprayed1-2timesintheconcaveandtheincludedangles,soastoguaranteetheappearancequalityofthecoating
4.changecolor
(1)thoroughlycleanthepowdertubeandpowdersupplybarrel
(2)sweepthepowdertubewithcompressedair
(3)thepowdercoatingwillbeusedinthepowderfeedingbarreltocompletethepreparation
(4)beforestartingspraying,
Spraytheguninthedirectionofthepowderroom
5.cleaningofsprayingequipment
(1)removalandremovalofvariouspipelinesforpowderdrums,
(2)wipethewire,airhoseandpowdertubewithacloth,
(3)cleartheremainingpowderinthebarrel
(4)cleantheinnerwallofthebarrel,especiallythebottom
Four.Dehydration,dryingandcuring
1.startpaintinglinecabinetsetandcheckthetemperaturerangeofdehydrationdryingandcuringbakingwere120-150C.
2.turnonthemotorcoolingwaterswitch.
3.,accordingtotheorderofdehydration,drying,curing,bakingfan,andthenopendehydration,drying,curing,baking,combustionmachine.
4.setthechainspeedat1.5m/min.andturnonthechainspeedcontrolkey.
5.duringproduction,thegroupleaderisresponsibleforinspectingtheoperationofpowercontrolcabinet.
6.shutdown,firstoffdehydrationdrying,curingbakingcombustionmachine,andthenturnoffthefan,andfinallycloseitscoolingwater.
7.turnoffthechainspeedcontrolkey.
8.closethepaintinglinecabinet.
Five.Cooling
Naturalstrongcold,makethefinishedproductcooldownquickly,easytoexamine,carry,pack
Six.Inspectionofsprayedparts
1.filmthickness(refertoGB/T1767)
Filmthicknesstester
Thickness:
accordingtocustomerdemand
Requirements:
thesurfacedoesnotallowopenattheend,pinh
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