Dry pressing molding method
Alumina ceramicyakaoma kuumba tekinoroji inogumira kune yakachena chimiro uye ukobvu hwemadziro kupfuura 1mm, kureba kusvika kudhayamita reshiyo haipfuure 4∶1 zvigadzirwa.Nzira dzekugadzira dziri uniaxial kana biaxial.Muchina wekudhinda une hydraulic, mechanic mhando mbiri, inogona kuita semi-otomatiki kana otomatiki kuumba.Iyo yakanyanya kudzvanywa yekutsikisa ndeye 200Mpa, uye inobuda inogona kusvika 15 ~ 50 zvidimbu paminiti.
Nekuda kweiyo yunifomu sitiroko kudzvanywa kwe hydraulic press, kureba kwekutsikirira zvikamu kwakasiyana kana hupfu hwekuzadza hwakasiyana.Nekudaro, kudzvanywa kunoshandiswa nema mechanical press kunosiyana nehuwandu hwekuzadza hupfu, izvo zvinozotungamira kune mutsauko muhukuru shrinkage mushure mekupisa uye kukanganisa kunaka kwezvigadzirwa.Nokudaro, kugoverwa kweyunifomu yehupfu hwehupfu mukuoma kwekutsikirira kwakakosha zvikuru pakuzadza mold.Kunyangwe huwandu hwekuzadza hwakaringana kana husina hune pesvedzero huru pane dimensional chaiyo kudzora kweakagadzirwa alumina ceramic zvikamu.Iyo yakanyanya kuyerera yemahara mhedzisiro inogona kuwanikwa kana hupfu hwehupfu hwakakura kupfuura 60μm uye pakati pe60 ~ 200 mesh, uye yakanakisa kumanikidza kuumba mhedzisiro inogona kuwanikwa.
Grouting molding nzira
Grouting molding ndiyo nzira yekutanga yekuumba yakashandiswa mukatialumina ceramics.Nekuda kwekushandiswa kwegypsum mold, mutengo wakaderera uye nyore kugadzira saizi hombe, yakaoma chimiro zvikamu, kiyi yekuumba grouting ndiko kugadzirira kwealumina slurry.Kazhinji nemvura sezvo flux svikiro, uye wobva wawedzera guruu pakunyungudutsa mumiririri uye binder, zvizere pashure achikuya eutsi, uye ipapo akadururirwa kupinda plaster chakuvhe.Pamusana pekushambadza kwemvura ne capillary yegypsum mold, slurry inosimbiswa muhutu.Hollow grouting, mune mold wall adsorption slurry ukobvu kusvika kune inodiwa, asi zvakare inoda kudurura yakawandisa slurry.Kuti uderedze shrinkage yemuviri, high concentration slurry inofanira kushandiswa zvakanyanya sezvinobvira.
Organic additives inofanira kuwedzerwa kunealumina ceramicslurry kuumba kaviri yemagetsi layer pamusoro pe slurry particles kuitira kuti slurry inogona kumiswa zvakasimba pasina kunaya.Uye zvakare, zvinodikanwa kuwedzera vinyl doro, methyl cellulose, alginate amine uye imwe binder uye polypropylene amine, Arabic chingamu uye mamwe ma dispersants, chinangwa ndechekuita slurry yakakodzera grouting molding operation.
Sintering tekinoroji
Iyo yehunyanzvi nzira ye densifying granular ceramic muviri uye kugadzira yakasimba zvinhu inonzi sintering.Sintering ndiyo nzira yekubvisa chivharo pakati pezvimedu zviri mumuviri webillet, kubvisa zvishoma zvegasi uye tsvina kubva kune organic matter, kuitira kuti zvimedu zvikure pamwe chete uye zvigadzire zvinhu zvitsva.
Mudziyo wekupisa unoshandiswa kupfutidza kazhinji ichoto chemagetsi.Kuwedzera kune yakajairwa kumanikidza sintering, ndiko kuti, pasina kudzvanywa sintering, kupisa kudzvanya sintering uye inopisa isostatic kudzvanya sintering.Kuramba kuchipisa kudzvanya kunogona kuwedzera kugadzirwa, asi mutengo wemidziyo uye mold wakanyanya kukwirira, kuwedzera kune kureba kwechigadzirwa kunogumira.Kupisa isostatic pressure sintering inotora tembiricha yakakwira uye yakanyanya kudzvanywa gasi senge yekumanikidza kufambisa svikiro, iyo ine mukana wekudziya yunifomu kumativi ese, uye inokodzera sintering yezvigadzirwa zvakaomarara.Nekuda kwechimiro chakafanana, zvimiro zvezvinhu zvinowedzerwa ne30 ~ 50% zvichienzaniswa nekutonhora kudzvanya sintering.10 ~ 15% yakakwirira kupfuura yakajairwa inopisa yekutsikirira sintering.
Nguva yekutumira: May-12-2022