外文翻譯-- 繪畫噴霧 英文版.pdf

ABCsofSprayPaintingABCsofSprayPainting$10.00A-2928-AForwardTableofContents2Whilethisbookexaminesthesprayfinishingoperationanditsequipmentfrommanyviewpoints,thereisstillmuchmoretobelearnedtobecometrulyproficientatsprayfinishing.Thebestwaytobecomeproficientatsprayfinishingistojustdoit!Manytradetechnicalandcommunitycollegesoffercoursesinsprayfinishing,agreatwaytoimproveyourskills.Manyofthe“tricks”oftheprofessionalsprayfinisherinvolvepaintsandcoatings.Themanufacturersofthesematerialsroutinelypublishcompletebooksonthesesubjects.Thesepublicationsareavailableinspecialtypaintstoresandwillprovideyouwithconsiderabledetail.Manyofthesebooksalsocontaininformationontechniquesforsurfacepreparation.Anotherimportantsourceofinformation,particularlyonequipmentuseandselectionisyourlocalsprayfinishingequipmentdistributor.Nobookcouldevercompletelycoveraspecialistsin-depthknowledgeofequipment,techniques,maintenanceandtroubleshooting.Informationisavailablefrommanyresourcesonthesubjectofsprayfinishing.Itisourhopethatthisbookwillprovideyouwithastarttowardperfectingyourfinishingskills.ArecentadditiontoresourcesavailabletothesprayfinisheristheWorldWideWeb.Manymanufacturesarerepresentedandquestionandanswerforumsareavailable.PandAboutthisbook.Thisbookhasbeenupdatedseveraltimesfrom“TheABCsofSprayEquipment,”originallypublishedbyTheDeVilbissCompanyin1954.Itfocusesonequipmentandtechniquesforsprayfinishing.Theformatoftheoriginalbookwasquestion-and-answer.Wehaveretainedthatformatinthisedition.Thisbookisorganizedaroundthemajorcomponentsofanairspraysystemsprayguns,materialcontainers,hose,aircontrolequipment,compressors,spraybooths,respiratorsandashortsectionongeneralcleanlinessandothersourcesofinformation.Athoroughunderstandingofthematerialinthisbook-plusalotofactualspraypaintingpractice-shouldenableyoutohandlejustaboutanyspraypaintingsituation.Althoughwehavemadeanefforttomakethisbookasdetailedandascompleteaspossible,beawarethattheequipmentandproductsystemsusedtoillustratepointsareentirelybasedonDeVilbisstechnology.DeVilbissistheworldsoldestandlargestmanufacturerofspraypaintingequipment,andhasmaintainedthisleadershipsinceitsfoundingin1888.Forward.21.Introduction.3SurfacePreparation.3PaintPreparation32.AirAtomizingSprayGuns.4SprayGunTypes.4PartIdentificationandFunction.6Operation.9Maintenance.11Troubleshooting.133.MaterialContainers.164.HoseandConnections185.AirControlEquipment.206.Respirators.227.AirCompressors.238.SprayBooths.25.1.Introduction3Thisbookisabouttheselection,useandmaintenanceoffinishingequipment:sprayguns,tanks,cups,hoses,compressors,regulators,spraybooths,respirators,etc.Itpresumesthatyouarefamiliarwithstandardsurfacepreparationtechniquesthatmayberequiredbeforefinishingactuallybegins.Italsopresumesabasicknowledgeofthemanydifferenttypesofpaintsandcoatingsavailable.Creatingaperfectfinishrequiresasolidknowledgeofsurfacepreparation,finishesandspraypaintingequipment.Thefirsttwoareextensivelycoveredinmanyotherbooks.Themanufacturersofpaintsandcoatingshavegonetogreatlengthtopublishinformationontheirnewandexistingproducts.But,evenanextensiveknowledgeofsurfacepreparationtechniquesandpaintchemistryisnotenoughtoassureaprofessionalfinish.Thefinishmustbeappliedbyaspraygun,andallthevariablesofitsusemustbemastered.Theequipmentnecessarytoapplythefinishthespraygun,tank,cup,regulator,hoses,compressor,etc.mustallbematchedtothejobaswellastoeachother.Thatequipmentmustbeusedandmaintainedproperly,withanappreciationofhowandwhyitworksthewayitdoes.Themomentoftruthforanyfinishhappenswhenthetriggerispulled.Thisbookfocusesonthatmoment.SurfacePreparationThesurfacetobefinishedshouldbewellcleanedbeforepainting.Ifthepaintmanufacturersinstructionscallforit,thesurfaceshouldbechemicallytreated.Useablow-offgunandtackragtoremovealldustanddirt.Noamountofprimerorpaintwillcoverupabadlypreparedsurface.Plasticpartsmaycontainstaticelectricityfromthemoldingprocess.Thisstaticattractsparticlesofdustanddirt.Eliminatethembytreatingwith“destatisiz-ing”airusingaspecialblow-offgunthatimpartsaneutralchargetotheairflow.Achemicalanti-statictreatmentisalsoavailable.PaintPreparationTodaysfinishesareextremelycomplexchemicalformulations.Theyincludebothsolventandwaterbornetypes.Somemayrequiretheadditionofsolventstoformthepropersprayingviscosity.Othersmaysimplyrequiretheadditionofasecondcomponentataprescribedratiotoobtainsprayableconsistency.Manyofthemalsohavehardenersorotherchemicals,addedtothemtoinsurecorrectcolormatch,gloss,hardness,dryingtimeorothercharacteristicsnecessarytoproduceafirstclassfinish.Makesureyouarefamiliarwiththespecificfinishmaterialdatasheetsaccompanyingeachmaterial.Donotmixmaterialsfromvariousmanufacturers.Readandfollowdirectionscarefully.AllfinishmaterialsmustalsobesuppliedwithaMaterialSafetyDataSheet(MSDS).Thisdataprovidesinformationonproperhandlinganddisposalofmaterials.ManystatesrequirethatMSDSbekeptonfilebytheuser.Thefirststepisknowingthetypeandcolorofpainttheprojectrequires.Withthisdetermined,followthemanufacturersinstructionforpreparingitexactly.Ifyouhaveanydoubtsabouthowtoproceed,dontguess!Contactyourpaintsupplierforhelp.Improperlypreparedpaintwillneverproduceagoodfinish!Thechiefcharacteristicthatdeterminesthesprayablilityofpaintandhowmuchfilmmaybeappliedisitsviscosityorconsistency.Followingthepaintmanufacturersinstructionswillgetyouclose,butforprofessionalresults,useaviscositycup.Itisasimplebutveryaccuratewaytomeasurethethicknessofpaint.Withthecup,youcanthinorreducethepainttothepreciseconsistencyrequiredbythemanufacturer.Alwayspreparepaintinaclean,dust-freeenvironment.Painthasaremarkableabilitytopickupdirt.Dirtypaintwillnotonlyclogyourspraygun,butitwillalsoruinyourpaintjob.Getinthehabitofalwayspouringpaintintothecuportankthroughapaintstrainer.Paintisneverascleanasitlooks.32.AirAtomizingSprayGuns4IntroductionThespraygunisthekeycomponentinafinishingsystem.Itisaprecisionengineeredandmanufacturedinstrument.Eachtypeandsizeisspecificallydesignedtoperformacertain,definedrangeoftasks.Asinmostotherareasoffinishingwork,havingtherighttoolforthejobgoesalongwaytowardget-tingprofessionalresults.Thischapterwillhelpyouknowwhichisthepropergunbyreview-ingtheConventionalAirandHighVolume/LowPressurespraygundesignscommonlyusedinfinish-ing-suctionfeed,gravityfeedandpressurefeed.Itwillalsoreviewthedifferenttypesofgunsandcomponentswithineachdesign.Athoroughunderstandingofthedifferencesbetweensystemswillallowyoutoselecttherightgun,touseitproperlytoproduceahighqualityfinishandtocon-tributetowardaprofitablefinishingoperation.SPRAYGUNTYPES1.Whatisanairspraygun?Anairspraygunisatoolwhichusescompressedairtoatomizepaint,orothersprayablematerial,andtoapplyittoasurface.Airandmaterialenterthegunthroughseparatepassagesandaremixedattheaircapinacontrolledpattern.2.Whatarethetypesofairsprayguns?Airspraygunsmaybeclassifiedinvariousways.Onewayisbythelocationofthematerialcontainer:Figure1showsagunwithacupattachedbelowit.Figure3showsagunwithacupattachedaboveit.Figure4showsamaterialcon-tainersomedistanceawayfromitspressurefeedgun.Thetypeofmaterialfeedsystemisalsoawayofclassifyingguns:SuctionFeed.drawsmaterialtothegunbysuctionasinFigure1.GravityFeed.thematerialtravelsdown,carriedbyitsownweightandgravityasinFigure3.PressureFeed.thematerialisfedbypositivepressureasinFigure4.Gunsmayalsobeclassifiedaseitherexternalorinternalmixdependinguponthetypeofaircap.3.Whatisasuctionfeedgun?Aspraygundesigninwhichastreamofcompressedaircreatesavacuumattheaircap,providingasiphoningaction.Atmosphericpressureonthematerialinthesuctioncupforcesitupthesuctiontube,intothegunandoutthefluidtip,whereitisatomizedbytheaircap.Theventholesinthecuplidmustbeopen.Thistypegunisusuallylimitedtoaone-quart,orsmaller,capacitycontainerandlowtomediumvis