Kev Taw Qhia ntawmSandblasting

Lub sij hawm sandblasting piav qhia blasting abrasive khoom tawm tsam ib qho chaw los ntawm kev siv cua compressed. Txawm hais tias sandblasting feem ntau yog siv los ua lub kaus mom rau txhua txoj kev sib tsoo blasting, nws txawv ntawm kev txhaj tshuaj blasting qhov twg cov xov xwm abrasive yog propelled los ntawm lub log spinning.

Sandblasting yog siv los tshem tawm cov xim, xeb, khib nyiab, khawb thiab ua cov cim los ntawm qhov chaw tab sis nws kuj tuaj yeem ua tiav cov nyhuv cuam tshuam los ntawm etching nto los ntxiv kev ntxhib los mos lossis tsim.

Xuab zeb tsis tshua muaj siv nyob rau hauv sandblasting niaj hnub no vim muaj kev pheej hmoo ntawm kev noj qab haus huv thiab teeb meem ntsig txog cov ntsiab lus noo noo. Lwm txoj hauv kev zoo li steel grit, iav hlaws thiab txhuas oxide yog tam sim no nyiam ntawm ntau lwm hom kev txhaj tshuaj.

Sandblasting siv compressed cua los txhawb cov ntaub ntawv abrasive, tsis zoo li kev txhaj tshuaj blasting, uas siv lub log blasting system thiab centrifugal quab yuam rau propulsion.

Sandblasting yog dab tsi?

Sandblasting, feem ntau kuj hu ua abrasive blasting, yog ib txoj kev siv los tshem tawm cov kab mob, du ntxhib nto, thiab kuj roughen du nto. Qhov no yog cov txheej txheem theej tus nqi qis ua tsaug rau nws cov khoom pheej yig, thiab nws yooj yim thaum xa cov txiaj ntsig zoo.

Sandblasting yog suav tias yog ib qho kev sib tw ua kom zoo dua qub piv rau kev tua blasting. Txawm li cas los xij, kev siv zog tuaj yeem sib txawv nyob ntawm seb cov khoom siv sandblasting, lub siab ntawm cov cua compressed, thiab hom abrasive media siv.

Sandblasting muaj ntau yam kev xaiv ntawm cov ntaub ntawv abrasive uas siv tau rau hauv ntau daim ntawv thov, xws li tshem tawm cov xim thiab cov kab mob ntawm qhov chaw uas sib zog sib zog. Cov txheej txheem kuj yog qhov zoo tagnrho rau kev ntxuav cov khoom siv hluav taws xob rhiab thiab corroded connectors delicately. Lwm daim ntawv thov sandblasting uas xav tau ntau dua abrasive blasting lub zog tuaj yeem siv qhov chaw muaj kev kub ntxhov thiab kev tawm tsam ntau dua.

Cov txheej txheem Sandblasting ua haujlwm li cas?

Cov txheej txheem sandblasting ua haujlwm los ntawm kev xa cov xov xwm sandblasting mus rau qhov chaw los ntawm kev siv sandblaster. Lub sandblaster muaj ob yam tseem ceeb: lub lauj kaub tawg thiab cua nkag. Lub lauj kaub tawg tuav cov xov xwm abrasive blasting thiab funnels cov khoom los ntawm lub valve. Cov cua nkag yog siv los ntawm lub tshuab cua compressor uas siv lub siab rau cov xov xwm hauv lub chamber. Nws tawm ntawm lub nozzle ntawm kev kub ceev, cuam tshuam rau saum npoo nrog quab yuam.

Lub sandblast tuaj yeem tshem tawm cov khib nyiab, ntxuav qhov chaw, tshem cov xim, thiab txhim kho cov khoom tiav ntawm cov khoom. Nws cov txiaj ntsig zoo nyob ntawm seb hom abrasive thiab nws cov khoom.

Cov khoom siv sandblast niaj hnub no muaj cov txheej txheem rov qab uas khaws cov ntaub ntawv siv thiab rov ua dua lub lauj kaub tawg.

Cov Khoom Siv Sandblasting

Compressor - Lub compressor (90-100 PSI) muab cov cua compressor uas propels cov xov xwm abrasive rau saum npoo ntawm cov khoom. Siab, ntim, thiab horsepower feem ntau yog qhov tseem ceeb uas yuav tsum tau coj mus rau hauv tus account thaum xaiv qhov tsim nyog sandblasting compressor.

Sandblaster - Sandblasters (18-35 CFM - cubic feet ib feeb) xa cov xov xwm abrasive mus rau cov khoom siv cua compressed. Kev lag luam sandblasters xav tau ntau dua volumetric flow rate (50-100 CFM) raws li lawv muaj thaj tsam loj ntawm daim ntawv thov. Muaj peb hom sandblasters: gravity-fed, siab blasters (zoo siab), thiab siphon sandblasters (tsis zoo siab).

Blast txee - Lub blasting txee yog lub chaw nres tsheb blasting portable uas yog ib qho me me thiab compact kaw. Nws feem ntau muaj plaub yam: lub txee, abrasive blasting system, recycling, thiab sau plua plav. Cov khoom tawg yog ua los ntawm kev siv hnab looj tes qhov rau tus neeg teb xov tooj ob txhais tes thiab ko taw pedal rau kev tswj qhov tawg.

Kev tawgchav tsev - Chav tsev tawg yog ib qho chaw uas tuaj yeem ua tau ntau yam khoom siv uas feem ntau siv rau kev lag luam. Cov khoom siv dav hlau, cov khoom siv tsim kho, thiab cov khoom siv tsheb tuaj yeem yooj yim sandblasted nyob rau hauv chav tsev tawg.

Blast rov qab system - Cov cuab yeej siv sandblasting niaj hnub muaj cov tshuab rov ua kom rov ua kom rov qab tau cov xov xwm sandblasting. Nws kuj tshem tawm impurities uas yuav ua rau muaj kab mob hauv xov xwm.

Cryogenic deflashing system - Tsis tshua muaj kub los ntawm cryogenic deflashing systems tso cai rau kev nyab xeeb deflashing ntawm cov ntaub ntawv, xws li diecast, magnesium, yas, roj hmab, thiab zinc.

Cov cuab yeej ntub dej ntub dej - ntub blasting suav nrog dej rau hauv cov xov xwm abrasive blasting kom txo cov cua sov los ntawm kev sib txhuam. Nws kuj yog ib txoj kev ua kom zoo dua qub piv rau cov blasting qhuav vim nws tsuas yog txhuam cov hom phiaj hauv qhov chaw ua haujlwm.

Sandblasting Media

Raws li lub npe qhia, cov ntaub ntawv ua ntej ntawm sandblasting feem ntau siv cov xuab zeb vim nws muaj, tab sis nws muaj nws qhov tsis zoo nyob rau hauv daim ntawv ntawm cov dej noo thiab cov kab mob. Qhov kev txhawj xeeb loj nrog cov xuab zeb ua abrasive yog nws cov kev pheej hmoo rau kev noj qab haus huv. Kev nqus cov silica hmoov av los ntawm cov xuab zeb tuaj yeem ua rau cov kab mob ua pa hnyav, suav nrog silicosis thiab mob ntsws cancer. Yog li, niaj hnub no cov xuab zeb tsis tshua siv thiab ntau yam khoom siv niaj hnub no tau hloov pauv.

Cov xov xwm blasting sib txawv nyob ntawm qhov xav tau qhov chaw tiav lossis daim ntawv thov. Qee cov xov xwm blasting uas muaj xws li:

Aluminium oxide grit (8-9 MH - Mohs hardness scale) - Cov khoom siv blasting no yog qhov ntse heev uas yog zoo meej rau kev npaj thiab kho saum npoo. Nws raug nqi zoo vim nws tuaj yeem rov siv tau ntau zaus.

Aluminium silicate (coal slag) (6-7 MH) - Cov khoom siv los ntawm cov chaw tsim hluav taws xob hluav taws xob hluav taws xob no yog cov khoom siv pheej yig thiab siv tau. Kev lag luam roj thiab shipyard siv nws hauv kev qhib-blasting, tab sis nws yog tshuaj lom yog tias raug rau ib puag ncig.

Crushed iav grit (5-6 MH) - iav grit blasting siv cov iav hlaws uas tsis muaj tshuaj lom thiab nyab xeeb. Cov xuab zeb-blasting xov xwm no yog siv los tshem tawm cov coatings thiab kev sib kis ntawm qhov chaw. Crushed iav grit kuj tseem siv tau zoo nrog dej.

Soda (2.5 MH) - Bicarbonate soda blasting ua haujlwm tau zoo hauv kev maj mam tshem cov hlau xeb thiab ntxuav qhov chaw yam tsis muaj kev puas tsuaj rau cov hlau hauv qab. Sodium bicarbonate (baking soda) yog propelled ntawm qhov siab ntawm 20 psi piv rau li niaj zaus sandblasting ntawm 70 mus rau 120 psi.

Steel grit & steel txhaj (40-65 HRC) - Hlau abrasives yog siv rau kev npaj nto, xws li ntxuav thiab etching, vim lawv ceev stripping peev xwm.

Staurolite (7 MH) - Cov xov xwm tawg no yog silicate ntawm hlau thiab silica xuab zeb uas yog qhov zoo tagnrho rau tshem tawm cov npoo nyias nrog xeb lossis txheej. Nws feem ntau yog siv rau steel fabrication, ntauwd siv, thiab nyias cia cov hlab ntsha.

Ntxiv nrog rau cov xov xwm hais saum toj no, muaj ntau yam ntxiv. Nws tuaj yeem siv silicon carbide, uas yog qhov nyuaj tshaj plaws abrasive media muaj, thiab cov tshuaj tua kab mob, xws li walnut shells thiab pob kws cobs. Hauv qee lub tebchaws, cov xuab zeb tseem siv tau los txog niaj hnub no, tab sis qhov kev coj ua no muaj lus nug vim tias kev noj qab haus huv tsis raug cai.

Tua Media Properties

Txhua hom kev txhaj tshuaj tawm muaj cov 4 lub luag haujlwm tseem ceeb uas cov neeg ua haujlwm tuaj yeem txiav txim siab thaum xaiv yam siv:

Puab - Angular media muaj cov npoo ntse, tsis sib xws, ua rau nws siv tau zoo hauv kev tshem cov xim, piv txwv li. Round xov xwm yog ib tug softer abrasive tshaj angular media thiab tawm ib tug polished nto saib.

Qhov loj me - Qhov ntau thiab tsawg mesh rau sandblasting yog 20/40, 40/70, thiab 60/100. Loj mesh profiles yog siv rau kev nruj heev daim ntawv thov thaum mesh profiles yog rau tu los yog polishing los tsim ib tug tiav lawm khoom.

Qhov ceev dua - media nrog cov nqi siab dua yuav muaj ntau lub zog rau ntawm cov hlau saum npoo hlau raws li nws tau tsim los ntawm kev sib tsoo hose ntawm cov velocity.

Hardness - Harder abrasives ua rau muaj kev cuam tshuam loj dua rau ntawm qhov profile saum npoo piv rau softer abrasives. Media hardness rau sandblasting lub hom phiaj feem ntau ntsuas los ntawm Mohs hardness nplai (1-10). Mohs ntsuas qhov hardness ntawm cov ntxhia thiab cov khoom siv hluavtaws, uas qhia txog kev khawb ntawm ntau yam minerals los ntawm kev muaj peev xwm ntawm cov ntaub ntawv nyuaj los khawb cov ntaub ntawv softer.