Feem ntau ntawm cov duab yooj yim, tuab alumina cib khoom yog tsim los ntawm cov txheej txheem molding. Txoj kev hu ua molding (tseem hu ua semi-dry pressing method), yog kom muaj ib qho me me ntawm binder, nrog rau ib qho ntxhib particle thiab nplua hmoov piv ntawm billet, muab tso rau hauv cov qauv hlau, hauv cov xovxwm siab thiab molding.
Rau alumina cib khoom, uas yog, molding, vim li cas qhov luaj li cas ntawm cov av nkos yuav tsum hais txog cov ntxhib, nruab nrab thiab zoo sib koom tes, ntawm no, nws yog tsim nyog los piav qhia tshwj xeeb.
Ua ntej, cov khoom siv raw yog crushed mus rau ib tug tej yam fineness, lub hom phiaj yog ua kom muaj ntau qhov chaw ntawm cov khoom, uas yog conducive mus rau cov tshuaj tiv thaiv thiab sintering, tab sis rau molding, nws tsis yog tag nrho cov ntaub ntawv. Vim hais tias cov hmoov nplej zoo dua, qhov loj dua ntawm thaj chaw tshwj xeeb, qhov loj dua qhov ntim ntawm cov hmoov, uas ua rau nws nyuaj rau compact thaum molding, thiab yooj yim los tsim lamination.
Ntawm qhov tsis sib xws, yog tias cov av nkos yog cov ntxhib ntxhib, nws kuj yog qhov nyuaj rau kev cog lus, thiab vim tias qhov sib cuag ntawm cov khoom txo qis, qhov kev ncua deb ntawm cov chaw nruab nrab ntawm cov particles nce, uas tsis zoo rau cov tshuaj tiv thaiv theem. Yog li ntawd, nws yuav tsum ua kom sib luag ntxhib thiab zoo hais hauv cov khoom xyaw; Qhov thib ob, nws tau hais ua ntej tias thaum tib qhov loj me yog siv rau kev ntim khoom, qhov voidage piv yog 26 feem pua $47.6 feem pua. Yuav kom tau txais qhov ntim siab tshaj plaws, cov khoom uas muaj qhov sib txawv ntawm qhov sib txawv yuav tsum tau siv los ua kom haum, kom cov khoom me me tuaj yeem ua rau qhov sib txawv ntawm cov khoom loj. Thirdly, kom zoo particle collocation yuav txo tau lub shrinkage ntawm lub billet lub cev, uas yog zoo los tswj qhov loj ntawm lub billet lub cev. Ntawm chav kawm, nyob rau hauv lub alumina cib duab ntawm lub cev me heev, saum toj no peb cov ntsiab lus tsis tas overemphasized.
Cov khoom ntxhib siv hauv molding, feem ntau yog ntxiv rau hauv cov ntawv khi nrog cov hmoov zoo heev, yog ua rau hauv cov khoom ntxhib nrog zoo fluidity. Cov coarse hais feem ntau hu ua cuav hais. Cov txheej txheem ntawm kev ua cov khoom cuav lossis granulation yog raws li hauv qab no:
(1) Kev cai lij choj. Qhov tsim nyog tus nqi ntawm cov tshuaj aqueous ntawm lub binder yog ntxiv rau hauv cov hmoov, tov los ntawm coarse sieve, nyob ntawm seb lub cohesion ntawm lub binder, particle loj yog ntau uniform;
(2) Cov txheej txheem siab. Cov hmoov tov nrog cov binder yog thawj zaug nias rau hauv blocks thiab ces crushed thiab soj ntsuam rau hauv coarse nplej. Nws qhov ntom ntom thiab cov neeg kho tshuab zog yog qhov siab, uas yog feem ntau siv hauv kev lag luam ntau lawm.
(3) Lub teeb hlawv txoj kev. Lub pob hauv av nplua hmoov yog ua rau hauv av nkos nrog dej me me, calcined ntawm qhov kub thiab txias, thiab ces crushed los ntawm coarse sieve;
(4) Txoj kev ziab kom qhuav. Cov hmoov thiab binder yog ntxiv rau ua slurry, uas yog ces txau rau hauv lub granulator rau atomization. Cov tee dej yog qhuav los ntawm cua kub hauv granulator.
Cov txheej txheem ntawm molding ntawm alumina cib, summed, yuav tsum muaj cov nram qab no cov kauj ruam:
(1) Ua ntej, cov khoom siv raw yog ua tiav rau hauv cov hmoov zoo thiab cov khoom cuav;
(2) Tom qab ntawd raws li qhov yuav tsum tau ua ntawm billet, particle gradation;
(3) Ntxiv additives, lubricants, binders thiab lwm yam sib npaug sib xyaw rau hauv billet (los yog av nkos);
(4) Thaum kawg hnyav rau hauv pwm, hauv cov xovxwm compression molding.
