Cov khoom siv yas ua khoom noj zoo zoo nkauj thiab yooj yim rau kev ua kom huv. Tsis tas li ntawd, Niaj hnub no yas ua nyob ntev heev. Lawv feem ntau ntiab tawm hauv cov nroj tsuag hauv kev lag luam, txij li kev txhaj tshuaj yas yuav tsum muaj qee yam kev mob uas nyuaj rau hauv tsev. Tab sis qee zaum cov neeg uas ua qauv ntawm cov nkoj, dav hlau lossis tsheb nrog lawv tus kheej txhais tes yuav tsum ua ib feem ntawm cov khoom siv no.
Koj yuav tau cawm neeg los ntawm "cov khoom lag luam tiav"
Seem yas tuaj yeem nrhiav tau txhua qhov chaw. Cov khoom tawg qub uas ib txwm tshwm sim hauv tsev, txoj kev puv nkaus ntawm lub hwj thiab ntim khoom. Tus neeg nyiam xyaum ua qee yam nrog nws tus kheej tes yuav muaj lub tswv yim los sau txhua yam no, zom thiab yaj rau hauv ib yam khoom muaj nqis.
Tus pib "caster" yuav tsum tsis txhob ua qhov no, txij li txhua hom yas tsuas muaj nws lub zog txais tau, yog li nws yuav tau yaj ntawm qhov sib txawv. Tsis tas li ntawd, hauv kev tsim khoom, cov khoom siv feem ntau nrum rau hauv qhov chaw tshwj xeeb uas qhov chaw siab tswj tau.
Txawm hais tias koj tuaj yeem khaws cov tib hom ntawm cov yas thiab zom lawv, koj yuav tau txais npuas thaum yaj. Yog li nws yog qhov zoo tshaj plaws mus rau lub khw muag khoom kho vajtse thiab yuav cov kua yas ua kua, uas ua rau cov seem tsuas yog siv tau raws li qhov chaw ua Hoobkas. Epoxy tuaj yeem hloov cov yas. Koj tseem yuav xav tau:
- silicone;
- muaj peev xwm loj;
- lithol.
Yog tias koj txiav txim siab ua ib yam dab tsi los ntawm cov ntawv yas, tsis txhob ua nws sab hauv tsev. Cov yas vapors yog tshuaj lom.
Ua cov duab
Txhawm rau pov cov khoom yas ntau qhov chaw hauv tsev, koj yuav xav tau tus qauv zoo. Koj tuaj yeem ua nws tawm ntawm txhua yam. Haum rau koj:
- plasticine;
- gypsum;
- ntoo;
- ntawv thiab ntau lwm yam ntaub ntawv.
Ua tus qauv ntawm ib feem yuav raug pov. Tsho nws nrog lithol lossis lwm yam roj. Tom qab ntawd, ua cov duab. Silicone pwm ua ntau thiab nrov dua. Qhov no yog qhov nkag siab, nws yooj yim thiab yooj yim los ua haujlwm nrog cov khoom no, tab sis ob peb yam yuav tsum raug coj los siv. Ua ntej, muaj ob hom ntawm silicone, txhaws thiab txheej. Thib ob, txhua hom tau nws tus kheej elongation coefficient thiab nws tus kheej viscosity. Raws li rau thawj tus ntsuas, silicone nrog cov coefficient ntawm 200% lossis ntau dua yog qhov haum rau molding uas.
Xyuam xim rau cov viscosity index. Qhov me dua nws, qhov ntau yog cov duab yuav yog. Qhov no tseem ceeb tshwj xeeb tshaj yog tias koj npaj siab yuav ua haujlwm nrog potting silicone. Kuj tseem coj mus rau hauv tus account lub sijhawm polymerization. Yog tias koj muaj cov ntaub qhwv ntsej muag, tso cov qauv tso rau hauv cov khob haus dej (nws tuaj yeem ua cov kav hlau los yog, piv txwv li tooj dag) thiab sau nws nrog silicone. Siv cov roj nplua nyeem ua tib zoo nrog txhuam, txhuam rau hauv txhua qhov tsis sib xws. Cia cov tshuaj kho silicone thiab tom qab ntawd tshem tus qauv.
Cov raj npluav yog hlau ntim. Nws yuav tsum me dua li cov qauv loj.
Ncuav nthuav dav
Txheej txheem casting feem ntau nyob ntawm dab tsi xyov koj ua ib feem ntawm. Polyester cov tawv ntoo thiab cov dej ua kua yog qhov zoo vim tias koj tsis tas yuav yaj txhua yam, tab sis lawv txawv hauv viscosity thiab lauj kaub lub neej. Cov kev qhia no tau qhia hauv tus yam ntxwv. Ntub cov pwm thiab sau rau nws nrog kua yas raws li kev qhia. Cia cov yas tawv, tom qab ntawd muab cov khoom tshem tawm ntawm cov pwm.
