Kev xuab zeb casting ntawm cov li qub

Kev ua xuab zeb: Kev ua xuab zeb uas siv ntau hauv kev lag luam valve kuj tseem tuaj yeem muab faib ua ntau hom xuab zeb xws lixuab zeb ntub, xuab zeb qhuav, xuab zeb iav dej thiab furan resin xuab zeb tsis-ciraws li cov binders sib txawv.

(1) Xuab zeb ntsuab yog ib txoj kev molding uas siv bentonite ua tus binder hauv kev ua haujlwm. Nws cov yam ntxwv yog: cov xuab zeb pwm tiav lawm tsis tas yuav qhuav lossis dhau los ntawm kev kho mob tshwj xeeb, cov xuab zeb pwm muaj qee lub zog ntub, thiab lub plawv xuab zeb thiab lub plhaub muaj kev pom zoo zoo dua, uas yooj yim rau kev ntxuav casting thiab poob xuab zeb. Kev ua haujlwm molding ntau lawm yog siab, lub voj voog ntau lawm luv luv, thiab tus nqi khoom siv kuj qis, uas yooj yim rau kev teeb tsa cov kab sib dhos. Nws qhov tsis zoo yog: castings feem ntau muaj qhov tsis zoo xws li qhov hws, xuab zeb suav nrog, thiab xuab zeb nplaum, thiab qhov zoo ntawm castings, tshwj xeeb tshaj yog qhov zoo sab hauv, tsis txaus.

(2) Xuab zeb qhuav yog ib qho txheej txheem ua qauv siv av nplaum ua tus khi, thiab me ntsis bentonite tuaj yeem txhim kho nws lub zog ntub. Nws cov yam ntxwv yog: cov xuab zeb pwm yuav tsum tau ziab, muaj huab cua zoo permeability thiab huab cua dispersion, tsis yooj yim los tsim cov qhov tsis zoo xws li xuab zeb ntxuav, xuab zeb lo, thiab pores, thiab qhov zoo sab hauv ntawm lub casting kuj zoo sib xws. Nws qhov tsis zoo yog: xav tau cov khoom siv xuab zeb ziab, thiab lub voj voog ntau lawm ntev.

(3) Sodium silicate xuab zeb yog ib txoj kev molding siv dej iav ua ib qho binder. Nws cov yam ntxwv yog: dej iav muaj lub luag haujlwm ntawm kev ua kom tawv tom qab ntsib CO2, thiab tuaj yeem muaj ntau yam zoo thiab qhov zoo ntawm kev ua qauv roj hardening thiab ua lub hauv paus. Txawm li cas los xij, muaj qhov tsis zoo xws li lub plhaub tsis zoo, nyuaj rau ntxuav xuab zeb rau castings, thiab qis dua qhov rov ua dua ntawm cov xuab zeb siv.

(4) Furan resin tsis-ci xuab zeb molding yog ib txoj kev casting nrog furan resin ua ib tug binder. Nyob rau hauv chav tsev kub, lub molding xuab zeb yog kho vim yog cov tshuaj tshuag ntawm lub binder nyob rau hauv qhov kev ua ntawm tus neeg sawv cev curing. Nws cov yam ntxwv yog: lub xuab zeb pwm tsis tas yuav qhuav, uas ua rau lub voj voog ntau lawm luv luv thiab txuag hluav taws xob. Resin molding xuab zeb yog qhov yooj yim rau compact thiab muaj zoo collapsibility, thiab lub molding xuab zeb ntawm castings kuj tuaj yeem ntxuav tau yooj yim, qhov tseeb ntawm castings yog siab, thiab qhov tiav ntawm qhov chaw yog zoo, uas tuaj yeem txhim kho qhov zoo ntawm castings. Nws qhov tsis zoo yog: qhov zoo xav tau rau raw xuab zeb kuj siab, qhov chaw tsim khoom muaj ib tug me ntsis irritating tsw, thiab tus nqi ntawm resin kuj siab. Cov txheej txheem sib tov ntawm furan resin self-hardening xuab zeb: Resin self-hardening xuab zeb yog ua los ntawm kev sib tov xuab zeb tas mus li, ntxiv raw xuab zeb, resin, curing tus neeg sawv cev, thiab lwm yam nyob rau hauv lem, thiab sib tov lawv sai sai. Sib tov thiab siv txhua lub sijhawm. Qhov kev txiav txim ntawm kev ntxiv ntau yam khoom siv raw thaum sib tov cov xuab zeb resin yog raws li nram no: cov xuab zeb qub + tus neeg sawv cev kho (p-toluenesulfonic acid aqueous solution) - (120-180S) - resin + silane - (60-90S) - xuab zeb (5) Hom xuab zeb ib txwm muaj Casting cov txheej txheem ntau lawm: precision casting.