INVESTMENT CASTING (Lost WAX CASTING) PROCESS
Kev nqis peev casting txheej txheem yog ib txoj hauv kev zoo los tsim cov khoom siv hlau nrog qhov zoo tshaj plaws ntawm qhov tseeb thiab qhov chaw tiav, txo lossis tshem tawm cov kev ua haujlwm ntxiv.Nws yog ib tug ntawm cov hiob paub foundry txheej txheem.Cov pov thawj archaeological nyob rau hauv ntau qhov chaw ntawm lub ntiaj teb no qhia tau hais tias peev casting txheej txheem pib nyob rau hauv lub Bronze Age, nyob ib ncig ntawm 4,000 xyoo BC.Nws yog cov txheej txheem kev lag luam nrog kev ua kom zoo thiab kev tswj xyuas nruj rau txhua yam ntawm yim cov kauj ruam hauv qab no.
Thawj kauj ruam no yog tsim los ntawm kev tsim cov khoom siv hluav taws xob pov tseg los ntawm kev txhaj tshuaj rau hauv pwm (hlau tuag.)
Cov qauv siv quav ciab feem ntau muaj tib yam geometrical zoo li qhov npaj tiav cam khwb cia.Cov txheej txheem kev txhaj tshuaj siv quav ciab ua rau qee qhov burrs hauv cov qauv thiab nws yog ib qho tsim nyog yuav tsum tau muab tshem tawm kom zoo.Txawm tias qhov me me yuav luag tsis paub meej uas tsis koom nrog qhov kawg raug tshem tawm hauv cov txheej txheem no.
Tom qab deburring, cov qauv siv quav ciab yog, los ntawm cov txheej txheem thermal, sib sau ua ke rau tus neeg khiav dej num (alsowax-injected ua) thiaj li tsim tau ib tsob ntoo casting.
Cov txheej txheem ua tiav ntawm cov khoom siv tshwj xeeb slurry ceramic refractory yog siv rau tsob ntoo nrog kev tswj hwm kub thiab av noo.
Thaum cov txheej txheem ceramic npaj txhij thiab qhuav, tag nrho cov ntoo tau muab tso rau hauv qhov system autoclave kom tshem tawm feem ntau ntawm cov quav ciab los ntawm kev siv lub zog kom thiaj li nyob twj ywm tsuas yog cov plhaub pwm pwm.Txhua qhov chaw yav dhau los tau ntim nrog cov quav ciab, tam sim no khoob
Txhawm rau ua kom muaj zog dua txhua yam thiab thermal poob siab, lub plhaub pwm cov ntoo khoob tau muab tso rau hauv lub qhov cub hauv qhov kub ntawm kwv yees li 1,100 C. (2,000 F).
Tom qab cov txheej txheem calcination, lub plhaub plhaub pwm yog ua tib zoo ntim cov kua hlau, uas los ntawm lub ntiajteb txawj nqus ntws mus rau hauv tag nrho cov pwm sab hauv, tsim cov ntxhib workpieces, tag nrho txuas nrog lub sprue.
Tom qab ntawd cov workpieces ntxhib raug txiav tawm ntawm lub tress, tau txais kev ua tiav (sib tsoo, straightening, kho cua sov, machining, engraving, thiab lwm yam), thiab, tom qab ntawd, mus rau qhov kev soj ntsuam nruj kawg ua ntej ntim thiab xa mus rau tus neeg siv khoom.
