Granulating Systems
Granulating systems kuj hu ua "shotmakers", yog tsim thiab siv tshwj xeeb tshaj yog rau granulating bullions, ntawv, strips hlau los yog seem hlau rau hauv cov nplej kom zoo. Cov tso tsheb hlau luam granulating yog yooj yim heev rau tshem tawm. Rub-tawm kov kom yooj yim tshem tawm ntawm lub tank tso. Cov cuab yeej xaiv tau ntawm lub tshuab nqus tsev siab casting lossis lub tshuab nruam nruam nrog lub tank granulating yog cov tshuaj rau qee zaus granulating ib yam. Granulating tanks muaj rau txhua lub tshuab hauv VPC series. Cov txheej txheem hom granulating tshuab yog nruab nrog lub tank nrog plaub lub log uas yooj yim txav hauv thiab tawm.
Dab tsi yog hlau granulation?
Granulation (los ntawm Latin: granum = "grain") yog cov kws ua haujlwm kub txheej txheem uas lub ntsej muag ntawm lub pob zeb yog dai kom zoo nkauj nrog cov me me ntawm cov hlau zoo nkauj, npe hu ua granules, raws li tus qauv tsim. Qhov kev tshawb pom qub qub tshaj plaws ntawm cov pob zeb uas tau ua nrog cov txheej txheem no tau pom nyob rau hauv vaj ntxwv tombs ntawm Ur, hauv Mesopotamia thiab rov qab mus rau 2500 BC Los ntawm thaj chaw no, cov txheej txheem kis mus rau Anatolia, hauv Syria, mus rau Troy (2100 BC) thiab thaum kawg mus rau Etruria. (8 xyoo pua BC). Nws yog qhov maj mam ploj mus ntawm Etruscan kab lis kev cai nyob nruab nrab ntawm peb thiab thib ob centuries BC uas yog lub luag hauj lwm rau qhov poob ntawm granulation.1 Cov Greeks thaum ub ua hauj lwm granulation ib yam nkaus, tab sis nws yog cov craftsmen ntawm Etruria uas tau nto moo rau cov txheej txheem no vim yog. lawv txoj kev siv tsis zoo ntawm cov hmoov zoo granulation2 yam tsis muaj kev siv cov tawv tawv.
Granulation yog tej zaum qhov feem ntau mysterious thiab fascinating ntawm ancient ornamental tswv yim. Qhia los ntawm craftsmen Fenici thiab Greci rau Etruria nyob rau hauv lub xyoo pua 8th BC, qhov twg kev txawj ntse ntawm metallurgy thiab kev siv ntawm precious hlau twb nyob rau theem siab, kws txawj Etruscan goldsmiths ua cov txheej txheem no lawv tus kheej los tsim tej hauj lwm ntawm kos duab ntawm unequaled complexity thiab kev zoo nkauj.
Nyob rau hauv thawj ib nrab ntawm lub xyoo 1800s ob peb excavations tau ua nyob rau hauv ib ncig ntawm Rome (Cerveteri, Toscanella thiab Vulci) thiab Southern Russia (lub Kertch thiab Taman ceg av qab teb) uas qhia ancient Etruscan thiab Greek hniav nyiaj hniav kub. Cov jewels no tau dai kom zoo nkauj nrog granulation. Cov hniav nyiaj hniav kub tuaj rau cov xim ntawm Castellani Tsev Neeg ntawm jewelers uas tau koom nrog hauv kev tshawb fawb cov hniav nyiaj hniav kub thaum ub. Cov kev tshawb pom los ntawm Etruscan qhov chaw faus neeg nyiam cov neeg nyiam tshaj plaws vim lawv siv cov granules zoo heev. Alessandro Castellani tau kawm cov khoom qub no kom nthuav dav kom sim daws lawv txoj kev tsim. Nws tsis yog txog thaum xyoo pua 20th, tom qab Castellani tuag, qhov kev sib tw ntawm colloidal / eutectic soldering thaum kawg tau daws.
Txawm hais tias qhov tsis pub leejtwg paub tseem yog qhov tsis paub tseeb rau Castellanis thiab lawv cov neeg kawm, qhov tshiab Etruscan cov hniav nyiaj hniav kub tau ua rau cov hniav nyiaj hniav kub txhawb siab rau xyoo 1850. Cov txuj ci Goldsmithing tau tshawb pom uas tau ua rau Castellani thiab lwm tus rau kev ncaj ncees rov tsim dua qee qhov zoo tshaj plaws thaum ub cov hniav nyiaj hniav kub puas tau khawb. Ntau yam ntawm cov tswv yim no txawv heev los ntawm cov neeg ua hauj lwm los ntawm Etruscans tseem tseem tau txais txiaj ntsig zoo. Ib tug xov tooj ntawm cov Archaeological Revival hniav nyiaj hniav kub cov khoom tam sim no nyob rau hauv tseem ceeb cov hniav nyiaj hniav kub collections nyob ib ncig ntawm lub ntiaj teb no, nrog rau lawv cov qub counterparts.
GRANULES
Cov granules yog tsim los ntawm tib lub alloy raws li cov hlau uas lawv yuav siv tau. Ib txoj hauv kev pib los ntawm dov tawm ib daim ntawv nyias nyias ntawm cov hlau thiab txiab nqaim heev ntawm ntug. Lub fringe yog trimmed tawm thiab qhov tshwm sim yog ntau me me squares los yog platelets ntawm hlau. Lwm cov txheej txheem los tsim cov nplej siv cov hlau nyias nyias nyob ib ncig ntawm lub mandrel nyias, zoo li rab koob. Lub kauj yog txiav mus rau hauv me me dhia rings. Qhov no tsim cov rings symmetrical heev uas ua rau ntau qhov sib npaug ntawm cov granules. Lub hom phiaj yog los tsim ntau spheres tib qhov loj me uas muaj txoj kab uas hla tsis loj dua 1 hli.
Cov hlau platelets los yog dhia rings yog coated nyob rau hauv charcoal hmoov los tiv thaiv lawv los ntawm sticking ua ke thaum tua. Hauv qab ntawm lub crucible yog them nrog ib txheej ntawm charcoal thiab cov khoom siv hlau yog sprinkled nyob rau hauv thiaj li hais tias lawv yog sib npaug spaced li sai tau. Qhov no yog ua raws li cov txheej txheem tshiab ntawm charcoal hmoov thiab ntau daim hlau kom txog thaum lub crucible yog li peb-quarters tag nrho. Lub crucible raug rho tawm haujlwm hauv qhov cub lossis qhov cub, thiab cov hlau muaj txiaj ntsig zoo sib xws rau hauv qhov me me ntawm qhov kub kub rau lawv cov hlau. Cov spheres uas tau tsim tshiab no raug tso kom txias. Tom qab ntawd lawv tau ntxuav hauv dej los yog, yog tias siv cov txheej txheem soldering, pickled hauv acid.
Granules ntawm qhov tsis sib xws yuav tsis tsim kom muaj kev tsim qauv zoo. Txij li thaum nws tsis tuaj yeem ua rau tus kws ua haujlwm kub los tsim kom muaj qhov sib txuam zoo kawg nkaus ntawm tib txoj kab uas hla, cov granules yuav tsum tau txheeb xyuas ua ntej siv. Ib series ntawm sieves yog siv los txheeb cov granules.
Koj ua li cas txhaj tshuaj kub?
Puas yog cov txheej txheem ntawm kev txhaj tshuaj kub tsuas yog nchuav cov kub molten maj mam rau hauv dej tom qab koj tau rhaub nws? Los yog koj puas ua tag nrho ib zaug? Dab tsi yog lub hom phiaj ntawm kev txhaj tshuaj kub es tsis txhob ingots ect.
Kev txhaj tshuaj kub tsis yog tsim los ntawm kev nchuav los ntawm di ncauj ntawm lub thawv. Nws yuav tsum tau muab tshem tawm los ntawm lub nozzle. Koj tuaj yeem ua ib qho yooj yim los ntawm kev khawb ib lub qhov me me (1/8 ") hauv qab ntawm lub lauj kaub tais diav, uas yuav muab tso rau saum koj lub thawv dej, nrog lub teeb ua si ntawm lub tais, nyob ib ncig ntawm lub qhov. cov kub los ntawm khov nyob rau hauv lub tais thaum nws yog pauv los ntawm melting phaj nyob rau hauv uas cov hmoov yog melted Rau cov laj thawj uas ib txwm nyuaj rau kuv to taub, cov ntaub ntawv txhaj tshuaj, es tsis txhob ntawm cornflakes.
Kev txhaj tshuaj yog nyiam los ntawm cov neeg siv kub, vim nws ua rau hnyav tawm qhov xav tau yooj yim. Cov kws tshaj lij goldsmiths tsis yaj ntau ntau ntawm ib zaug, txwv tsis pub nws tuaj yeem ua rau muaj qhov tsis xws luag (gas inclusions).
Los ntawm melting tsuas yog cov nyiaj uas xav tau, cov nyiaj me me uas tshuav (lub sprue) tuaj yeem yaj nrog cov khoom tom ntej, kom ntseeg tau tias cov kub rov qab tsis sib xyaw.
Qhov teeb meem nrog melting kub lub sij hawm thiab dua yog hais tias lub hauv paus hlau (feem ntau tooj liab, tab sis tsis txwv rau tooj liab) oxidizes thiab pib tsim roj uas accumulates nyob rau hauv me me hnab ris hauv castings. Feem ntau txhua tus jeweler uas ua casting tau muaj qhov kev paub dhau los, thiab feem ntau suav tias yog vim li cas lawv yuav tsis, lossis tsis nyiam siv kub uas tau siv yav dhau los.