Dab tsi yog cov khoom siv?
Nyob rau hauv kev txhaj tshuaj hlau, cov binder plays lub luag haujlwm tseem ceeb. Kev kho yog feem ntau muaj sib xyaw ntawm ntau cov polymers, suav nrog cov theem tseem ceeb, xws li Dispordersal (xws li Disporants, Stabilizers, thiab cov yas). Lub luag haujlwm tseem ceeb ntawm cov phau ntawv yog kom nce cov cua ntawm cov hmoov thaum txhaj tshuaj los pab txhawb kev moulding thiab muab ib qho lub zog rau ntu tom qab molding. Raws li ib nrab tiv thaiv, cov binder tsis tsuas yog ua cov hlau hlau tab sis tseem tswj hwm nws cov duab ua ntej SINTERING pib. Sib tov cov binder nrog cov hlau pleev tsim cov pub rau cov pub mis, uas yog siv hauv kev txhaj tshuaj hlau. Lub binder tau muab tshem tawm tom qab txhaj tshuaj molding thiab ua ntej sintering pib.
Thiab cov yam ntxwv kawg tom qab sintering. Cov yam ntxwv ntawm phau ntawv cuam tshuam cuam tshuam rau kev faib cov hlau, qhov loj ntawm kev txhaj tshuaj molding, thiab cov khoom kawg ntawm Sintered Part. 4.1 Cov ntsiab lus ntawm cov yam ntxwv ntawm cov phau ntawv zoo tshaj plaws rau kev txhaj tshuaj tshiab. Cov binder thiab hlau hais kom muaj lub kaum sab xis me me, raws li lub ntsej muag me me tso cai rau lub hmoov zoo dua cov hmoov av, yog li ua kom yooj yim sib xyaw thiab txhaj tshuaj moulding. Cov binder thiab hlau hais yuav tsum nyob twj ywm ob leeg inert; Ntawd yog, cov binder yuav tsum tsis txhob hnov nrog cov hlau faib, thiab cov hlau ua kom tsis txhob ua rau lub binder rau polymerize lossis degrade. Qhov sib tov ntawm binder thiab hmoov, piv txwv li, cov pub mov, yuav tsum ua kom tau raws li ntau yam li cov khoom siv kom tau zoo rau cov khoom tsis yooj yim. Lub viscosity ntawm cov pub mis pub yuav tsum nyob rau hauv ib qho kev ua kom muaj kev txhaj tshuaj du molding. Tsawg dhau qhov qis heev rau cov roj ntsha viscosity yuav ua rau theem sib cais ntawm cov hmoov thiab cov ntoo thaum lub sij hawm molding viscosity yuav cuam tshuam rau kev sib xyaw thiab kev txhaj tshuaj moulding. Ntxiv rau qhov xav tau cov feuptock viscosity yuav tsum nyob rau hauv ib qho zoo tshaj plaws ntawm kev ua kom txias dua, uas pab kev txhaj tshuaj ua kom muaj qee yam zoo thaum txias.
Cov Lus 4.1 Cov yam ntxwv ntawm Cov Ntawv Zoo Tshaj Rau Cov Hlau Txhaj Pwm
| Yam | Yam ntxwv zoo tagnrho |
|---|---|
| Kev cuam tshuam nrog hmoov | Me Hu Lub kaum sab xis, kev ua tau zoo ua tau zoo nrog hmoov, tsis muaj tshuaj lom neeg nrog hmoov |
| Ntws cov yam ntxwv | Tsis muaj viscosity ntawm moulding kub, me me viscosity hloov thaum lub sij hawm molding, nrawm viscosity nce thaum txias, siab fluabicity thiab lub zog |
| Debinding cov cuab yeej | Stepwise decomposition, txawv kev sib txawv rau cov khoom sib txawv ntawm cov phau ntawv, qis dua cov ntsiab lus carbon monoxide, tsis yog {{{1 {corrosive decomposition khoom |
| Raug ua processilation | Yooj yim mus nrhiav tau, cov nqi tsim nyog, ntev txee lub neej, muaj kev nyab xeeb, tsis muaj saw cenching hauv lwg, tsis muaj kev faib tawm |
Cov phau ntawv no yuav tsum tau muab tshem tawm sai sai yam tsis muaj qhov tsis xws luag hauv kev txhaj tshuaj - moulded feem. Qhov tsis xws luag yog feem ntau yuav tsim nyob rau hauv lub cev ntsuab thaum lub sij hawm debinding vim tias ntxim nyiam ntawm kev nce ntxiv raws li lub zog-}} Muab cov cim qhia tau. Qhov tsis muaj qhov tsis pom kev nyob rau theem pib ntawm thermal debinding ua rau tsis xws luag xws li tawg thiab blistering hauv kev txhaj tshuaj {} moulded ntu. Kev ntxhov siab tsim los ntawm kev ua tsis tiav ntawm cov khoom lag luam polymer tsis zoo nyob rau hauv kev txhaj tshuaj {{6} moulded ib feem rau kev khiav dim kuj tuaj yeem ua rau tsis xws luag. Txhawm rau zam qhov no, cov phau ntawv no feem ntau tau tsim los ua ntau - cov txheej txheem uas decomposes ntawm ntau qhov kub. Hauv qhov no, cov txheej txheem Debinding tuaj yeem faib ua ob theem: hauv thawj theem, qhov muaj qis} Thaum lub sijhawm cov txheej txheem no, qhov seem ntawm cov txheej txheem ntawm cov txheej txheem muab lub zog thiab tswj cov duab kev txhaj tshuaj {13} moulded ntu. Hauv theem ob, lwm cov feem ntawm cov phau ntawv khaws cia tau raug tshem tawm maj mam. Qhov no ob -} theem debinding txoj kev tso cai rau kev tshem tawm sai ntawm phau ntawv los ntawm kev txhaj tshuaj- moulded ntu. Cov phau ntawv no yuav tsum yog decomposable tsis tau tawm cov khoom lag luam carbon nyob, thiab cov khoom siv decomposition thaum lub cev ua kom haum rau cov khoom siv.
Kev kho hauv cov hlau txhaj tshuaj moulding yuav tsum tau npaj muaj yooj yim, pheej yig, thiab muaj lub teeb ntev; rooj vag thiab khiav khib nyiab yuav tsum rov siv dua thaum lub tshuab molding cov txheej txheem; Cov phau ntawv yuav tsum muaj kev siv hluav taws xob zoo thiab yuav tsum tsis txhob txwv thaum lub sijhawm rov ua; Cov phau ntawv yuav tsum muaj siab thermal conductivity thiab tsis coefficient ntawm thermal nthuav kom tiv thaiv tsis taus los ntawm kev ntxhov siab thermal.
Ib phau ntawv ib phau tsis zoo li kom tau raws li txhua tus yam ntxwv pub mis; Binder Systems Siv kev txhaj tshuaj moulding feem ntau muaj ntau yam ua ke, txhua qhov ua ib qho kev ua haujlwm tshwj xeeb. Ib qho system uas feem ntau muaj cov khoom sib xyaw tseem ceeb, nrog lwm cov khoom ua yeeb yam raws li cov khoom cais kom ua tiav cov yam ntxwv uas xav tau.