Poob npaus casting (LFC) yog cov qauv ua npuas ncauj ua npuas dej yog foamed thiab ploj hauv cov xuab zeb mould los ua tus pov. Tus txheej txheem no muaj cov txiaj ntsig zoo li tsim qauv, cov kev ua phooj raws ib puag ncig, thiab ib puag ncig siv nyob hauv automotive, machinery, thiab aerospace kev lag luam. Txhawm rau kom ua npuas zoo thiab ruaj khov ntawm ploj ua npuas dej yog qhov tseem ceeb, npog cov kauj ruam kev tshawb fawb muaj xws li cov qauv tseem ceeb xws li cov qauv ua, txheej, xuaj zeb puv, thiab nchuav.
1. Qauv Cov Qauv
Cov tub ntxhais ntawm ploj ua npuas dej casting yog cov qauv yas ua npuas dej, qhov zoo tshaj uas cuam tshuam rau qhov tseeb thiab qhov chaw zoo ntawm qhov kawg casting cam khwb cia. Tus qauv tsim tau yuav tsum ua kom tau raws cov qauv hauv qab no:
Xaiv cov khoom siv: polystyrene (eps) lossis coplmymer (stmma) feem ntau ntawm 18 thiab 25 g / l, nyob ntawm phab ntsa thickness thiab qauv ntawm lub casting.
Ua qhov raug: Qauv nyob sab hauv Cov txheej txheem nyuaj yuav tsum cnc machining lossis 3D luam tawm kom paub tseeb.
Tsevneeg thiab kev sib dhos: Thaum koom nrog ntau cov pwm, siv tshwj xeeb kub {} yaj {}}}} kua nplaum nplaum. Qhov sib txawv ntawm cov chaw uas tau tshaj 0.1 mm los tiv thaiv kom tsis txhob muaj hlau nkag rau lub sijhawm nchuav.
Kom qhuav: Cov pwm yuav tsum qhuav qhuav, nrog cov ntsiab lus ya raws hauv qab 0.5%, los tiv thaiv porosity thiab deformation thaum pouring.
Ii. Txheej Txheej
Txheej yog ib tug txheej txheem tseem ceeb hauv ploj ua npuas ncauj. Nws txoj haujlwm yog cais cov molten hlau los ntawm cov xuab zeb pwm thaum ua kom muaj pa permeability. Daim ntawv thov txheej txheej yuav tsum ua kom tau raws li cov kev cai hauv qab no:
Txheej sib piv: regractory aggregates xws li quartz hmoov thiab corundum hmoov feem ntau siv. Silica sol lossis dej iav yog siv los ua phau ntawv. Bentonite lossis cmc yog siv los ua cov neeg sawv cev ncua sijhawm. Cov txheej txheej ceev yuav tsum yog nruab nrab ntawm 1.8 thiab 2.2 g / cm³, thiab viscosity yuav tsum tau muaj mob los kom ntseeg tau tias txawm thov.
Txheej Txheej Txheem: DIP txheej lossis Txau Txheej yog siv. Cov txheej txheej txheej tuab feem ntau yog 0.5 rau 2 hli, nrog ntxiv thickness thov mus rau thaj chaw tseem ceeb.
Kev kom qhuav: Cov txheej yuav tsum ua kom qhuav tas li
III. Moulding thiab Xuab Zeb Sau Cov Qauv
Cov xuab zeb pwm yog ib qho tseem ceeb uas txhawb nqa qauv thiab tiv thaiv qhov cuam tshuam ntawm cov hlau molten. Nws txoj kev cog lus thiab huab cua permeability ncaj qha cuam tshuam rau qhov zoo ntawm cov casting.
Qhuav xuab zeb: quartz xuab zeb lossis zircon xuab zeb nrog lub cev qhuav hluav taws xob (piv txwv li siv tau los ua kom muaj huab cua zoo thiab muaj txiaj ntsig.
Cov xuab zeb sau: xuab zeb sau yuav tsum tau ua siv cov txheej txheem kev co tshuab kom ntseeg tau tias cov xuab zeb uas tsis muaj suab lossis xoob xoob.
Kev tswj kev sib xyaw: cov pwm compacticness yog feem ntau 80-90% (ntsuas siv cov qauv xuab zeb kev ntsuas). Qhov kev co thiab ntev ntev thiab ntev yuav tsum tau ua kom zoo raws li cov qauv ua kom tsis txhob muaj cov pwm deformation.
Lub siab tsis zoo: lub siab tsis zoo siab (feem ntau 0.03-0.0 MPa yuav tsum tswj hwm cov xuab zeb mould mould thiab pab txhawb roj tawm.
IV. Pouring txheem txheej txheem
Pouring yog qhov tseem ceeb tseem ceeb tshaj plaws nyob rau hauv poob ua npuas dej Casting, cuam tshuam ncaj qha cuam tshuam txog qhov ceev thiab tsis tuaj yeem tswj hwm ntawm lub casting.
Ncuav kub: kho raws li hom alloy. Piv txwv li, cov hlau cam khwb cia yog feem ntau yog 1380-1420 degree, zas℃1400-1450 degree, thiab steel 1550-1620 degree.
Ncuav nrawm nrawm: tswj ib qho ruaj khov ua nrawm kom tsis txhob muaj ntau dhau qhov uas yuav ua rau cov xuab zeb ntxuav uas tuaj yeem ua rau txias lossis tsis txaus pouring.
Kev tswj siab tsis zoo: tswj hwm qhov tsis zoo ruaj khov thaum lub sijhawm nres thiab maj mam txo nws tom qab pouring los tiv thaiv deformation lossis vau rau ntawm lub casting.
Gating tsim qauv tsim qauv: Siv hauv qab lossis sab ncuav kom muaj cov hlau uas du ntawm cov hlau thiab cov kab mob oxidation.
V. Post {{- kev ua thiab tshuaj ntsuam cov qauv
Kev ntxuav tu: Tom qab cov khoom txias, tshem tawm cov riser, cov khoom seem ntawm cov xuab zeb. Tua blasting lossis sandblasting yuav siv tau.
Tshuaj Xyuas Kev Ntsuas Xyuas Tsis Raug: Sab hauv Zoo yog tshuaj xyuas los ntawm x {{0} Kev tshuaj xyuas duab, kev kuaj hluav taws xob, lossis ntsuas phoo kev kuaj mob, lossis ntsuas phoo kev sim ua kom tsis xws li ntawm qhov tsis xws luag thiab qhov ntsws.
Kev soj ntsuam seem: Qhov ntev tshaj plaws yog kuaj xyuas siv lub tshuab ntsuas lossis calipers ua ke nrog cov qauv tsim qauv.
Tag
Cov qauv kev tsim kho rau ploj ua npuas ncauj ua npuas (LFC) ua kom muaj ntau theem, suav nrog cov qauv tsim, txheej, xaim, thiab tshaj tawm {{{0} {0} {0} {0} {0} {0} {0} {0} - Ua. Txhua kauj ruam ib qho yuav tsum tau tswj nruj kom ntseeg tau qhov siab zoo thiab qhov zoo ntawm cov casting. Cov qauv kev tsim kho tshiab txuas ntxiv, LFC cov qauv tsim kho yuav dhau los ua kom zoo nkauj rau kev ua haujlwm ua haujlwm, ib puag ncig kev ua phooj ywg, thiab kev txawj ntse ib puag ncig.
