1.Wiech maitiro

Iyo Wiech process inomiririrwa ne patent yakagadzirwa naWiech muna 1980 uye yakagadziridzwa kakawanda. Iyo yakakosha yekunamatira system yeWiech process inoumbwa neparafini wakisi uye thermoplastic resin. Binder nehupfu zvinosanganiswa pane "Z" kana "Σ" mhando yeblade shear mudziyo. Iyo yekutanga degreasing process idanho-matanho maviri umo iyo MIM inogadzira billet inotanga kuiswa mumudziyo wevacuum uye inopisa kusvika kana pamusoro pekuyerera kwekuyerera kwebhainda, uye zvino solvent inowedzerwa zvishoma nezvishoma mune gaseous fomu kumudziyo umo iyo inoumba billet iripo. Iyo gaseous solvent inopinda mukugadzira billet kuti iparadze binder, uye kana yakanyungudutswa kune imwe nhanho, iyo inonyungudutsa mhinduro yebinder ichabuda kubva pakugadzira billet. Iyo yekuumba blank ine yakawanda yebinder yakabviswa inonyudzwa mumvura inonyungudutsa kubvisa bhainda rasara. Pakupedzisira, iyo yekugadzira billet inofanopisa kuti ibvise imwe yakasara binder uye inonyungudutsa, uye chigadzirwa chakapedzwa chinopisa. Iyo nzira inotora mazuva matatu kuti degrease gaseous solvent chete

Kubudirira kwekubvisa mafuta kwakaderera zvikuru. Sezvo tembiricha yekudzikira yakakwira kupfuura tembiricha yekuyerera yebinder, deformation yakakomba. Maitiro acho akazoshandurwa kune ese degreasing nekuora kwekupisa uye nguva yekudzikisa yakaderedzwa zvakanyanya. Mukutanga kusimudzira kweMIM indasitiri, makambani mazhinji akatora Wiech maitiro. Kusvika ikozvino, mamwe makambani achiri kushandisa Wiech maitiro ekugadzira. Nekudaro, Wiech process ine matambudziko akadai sekunyanya kushushikana kwejekiseni girini isina chinhu, nyore kupaza uye deformation, uye zvakaoma kugadzira zvikamu zvine saizi yakakura.

2 Injectamax maitiro

Johnson weAMAX Metal Injection Molding USA akagadzira Injectamax process muna 1988. Chakanakira nzira iyi ndechekuti binder rayo rine parafini, mafuta emuriwo, uye polymer. Oiri yemuriwo imvura kana yaiswa jekiseni uye yakatonhodzwa, izvo zvinoita kuti vhoriyamu yekugadzira billet ichinje zvishoma isati yasvika uye mushure mekugadzira jekiseni, uye inoderedza kushushikana kwemukati mukugadzira billet. Pakubvisa mafuta, chinonyungudutsa senge trichloroethane chinoshandiswa kunyungudutsa mafuta emuriwo neparafini wakisi kutanga, nepo zvisinganyungudika zvisinganyungudike. Izvi zvinovhura chiteshi chepore uyezve chinobvisa chinosungirirwa chasara nekupisa kwemafuta. Iyo yose degreasing process time ipfupi, chete 6h, imwe chete

Nzira inokurumidza yekubvisa mafuta. Nekuda kwekureruka kwayo, kuderera kwekudyara uye kushanda kwakanyanya, iyo solvent degreasing uye thermal degreasing maviri-nhanho maitiro parizvino anogamuchirwa nevakawanda.Makambani eMIMuye vagadziri.

3 Metamold nzira

Metamold process iMIM inokonzeresa degreasing process yakagadziridzwa neBloemacher yakaenzana neBSAF kuGermany mukutanga ma1990s. Chikuru chehunyanzvi hunhu hweiyi nzira ndechekuti inoshandisa polyether resin sebinder uye inokonzeresa kudonha nekukurumidza muacidic atmosphere. Kushandiswa kweketani refu resin polyether sebinder, uchishandisa polyether resin polarity kuti ubatanidze upfu hwesimbi, inogona kukodzera kune zvakasiyana-siyana zvehupfu. Formaldehyde yakaora kuita formaldehyde pasi pecatalysis yeasidhi yemhepo. Uku kuita kwekuora kunoitika nekukurumidza pamusoro pe110 ℃, inova yakananga gasi-2 shanduko yakasimba. BASF pakutanga yakashandisa nitric acid sechinhu chinokonzeresa, icho chinokonzeresa kudzikira padanho rakaderera pane polymerization.

Iyo yekunyorovesa tembiricha yealdehyde resin inodzivirira kuumbwa kwechikamu chemvura, icho chinobatsira kudzora deformation yegirinhi billet uye inova nechokwadi chekurongeka kwedimensional mushure mekunyungudika. Iyo catalytic degreasing inoitwa pachiratidziro chebhainda mumhepo 2. Hapana gasi mubillet yekugadzira, uye kufambira mberi kweiyo reaction interface kunogona kusvika 1 ~ 4mm / h. BASF yakazogadzira nzira itsva yekushandisa oxalic acid sechinhu chinokonzeresa, iyo inogona kuiswa kune yakaoma alloys uye ceramics, kuwedzera kushandiswa kweMetamold process. Chinhu chakakosha cheMetamold nzira ndechekuti inotora catalyst degreasing, uye hapana nhanho yemvura inoonekwa panguva yekudonha, iyo inodzivirira kushaya simba kweMIM zvigadzirwa zvinotapukira ku deformation uye dimensional kunyatso kudzora kwakaoma. Iko budiriro huru muindasitiri yeMIM, uye nekuti inokonzeresa degreasing, nguva yekudzikisira inopfupikiswa zvakanyanya uye mutengo unodzikiswa. Saizi yakakuraMIM zvikamuinogona kugadzirwa neMetamold nzira. NeCREMER's inoenderera mberi degreasing uye sintering system, kuenderera kugadzirwa kunogoneka, zvichiita kuti MIM ive yemakwikwi PM ari pedyo-yakachena kuumba tekinoroji. Nekudaro, iyi nzira ine mamwe matambudziko akadai seasidhi yemhepo corrosion midziyo uye marara gasi kurapwa, uye mutengo wekutanga midziyo yekudyara wakakwira zvakanyanya.

Huku dzekambani yeUs-Based Thermal Precision Technology yagadzira nzira itsva inonzi precision metalupfu jekiseni kuumba(PPIM). Kambani iyi inoti kushandisa maitiro aya kuchasimudzira tekinoroji yeMIM kupinda munguva itsva yemutengo wakaderera, kunyatsojeka, goho repamusoro uye kugadzirisa nharaunda. Iwo makuru ehunyanzvi maitiro ePPIM maitiro akaiswa muzvikamu zviviri, imwe ndeye kushandiswa kwemvura-soluble binder. Iyo binder ine polyethylene glycol (PEG) sechinhu chekutanga uye yakachinjika polima senge polyvinyl butyral (PVB) sechinhu chechipiri. Saka degreasing inogona kukamurwa kuita nhanho mbiri, yekutanga inobviswa nemvura yekunyungudika nziraPEG, apo PVB inoramba iri muchinjika-yakabatana yakasimba mamiriro. Nekune rimwe divi, hurongwa hwePPIM hunotora hupfu hwesimbi hunoumbwa nekuiswa kwehupamhi hudiki saizi, uchishandisa hupfu hwakakasharara, hupfu hwakatsetseka, kuitira kuti kurodha kwehupfu mukudya kuwedzere, nekuti hupfu hwesimbi hunogona kusvika 74% (chikamu chevhoriyamu), zvichideredza zvakanyanya saizi shrinkage. Nekuda kwekuvandudzwa kuviri uku, kurongeka kwechigadzirwa kunogona kusvika ± 011% nekushandisa.PPIM maitiro, iro rakakwirira kupfuura mamwe ose MIM maitiroparizvino.