Inqubo ye-1.Wiech

Inqubo ye-Wiech imelwe yilungelo lobunikazi elasungulwa ngu-Wiech ngo-1980 futhi selithuthukiswe izikhathi ezimbalwa. Uhlelo oluyisisekelo lokunamathela lwenqubo ye-Wiech lwakhiwe nge-wax kapharafini kanye ne-thermoplastic resin. I-binder kanye nempushana kuxutshwa kudivayisi yokugunda i-blade yohlobo lwe-“Z” noma i-“Σ”. Inqubo yokuqala yokwehlisa amafutha iyisinyathelo esinezinyathelo ezimbili lapho i-billet eyenza i-MIM ifakwa kuqala esitsheni se-vacuum futhi ishiselwe noma ngaphezu kwezinga lokushisa lokugeleza kwe-binder, bese i-solvent yengezwa kancane kancane ngendlela yegesi esitsheni lapho i-billet yokwakha ikhona. I-solvent ye-gaseous ingena ku-billet yokwakha ukuze ichithe i-binder, futhi uma ichitheka ngezinga elithile, isisombululo se-solvent se-binder sizophuma ku-billet yokwakha. Ukubumba okungenalutho okukhishwe okuningi kwesibophezelo kucwiliswa ku-solvent engamanzi ukuze kukhishwe isibophezelo esisele. Ekugcineni, i-billet eyenza i-billet ishiswe ngaphambili ukuze isuse enye ye-binder esele kanye ne-solvent, futhi umkhiqizo oqediwe uyashiswa. Inqubo ithatha izinsuku ezi-3 ukuze kuncishiswe i-solvent yegesi iyodwa

Ukusebenza kahle kwe-degreasing kuphansi kakhulu. Njengoba izinga lokushisa lokunciphisa liphakeme kunezinga lokushisa lokugeleza kwe-binder, ukuguqulwa kubi kakhulu. Inqubo kamuva yashintshwa kukho konke ukuwohloka ngokubola okushisayo futhi isikhathi sokwehlisa sancipha kakhulu. Ekuthuthukisweni kokuqala kwemboni ye-MIM, izinkampani eziningi zamukela inqubo ye-Wiech. Kuze kube manje, ezinye izinkampani zisasebenzisa inqubo ye-Wiech ekukhiqizeni. Kodwa-ke, inqubo ye-Wiech inezinkinga ezinjengokucindezeleka okuphezulu komjovo oluhlaza ongenalutho, kulula ukuqhekeka nokuguqulwa, futhi kunzima ukukhiqiza izingxenye ezinosayizi omkhulu.

2 Inqubo ye-Ijectamax

UJohnson we-AMAX Metal Injection Molding USA wasungula inqubo ye-Injectamax ngo-1988. Inzuzo enkulu yale nqubo ukuthi isibopho sayo siqukethe upharafini, uwoyela wemifino, kanye ne-polymer. Amafutha emifino ayiketshezi uma ejova futhi epholile, okwenza ivolumu ye-billet yokwakha ishintshe kancane ngaphambi nangemva kokwakhiwa komjovo, futhi inciphisa ukucindezeleka kwangaphakathi ku-billet yokwakha. Lapho kususwa amafutha, i-solvent efana ne-trichloroethane isetshenziselwa ukukhetha amafutha emifino kanye ne-parafini wax kuqala, kuyilapho izingxenye ezingancibiliki zingancibiliki. Lokhu kuvula isiteshi se-pore bese kususa i-binder esele ngokususa ukushisa okushisayo. Isikhathi sonke senqubo yokwehlisa amafutha sifushane, i-6h kuphela, sinye

Indlela esheshayo yokwehlisa amafutha. Ngenxa yobulula bayo, ukutshalwa kwezimali okuphansi nokusebenza kahle okuphezulu, inqubo yokunciphisa i-solvent kanye ne-thermal degreasing inqubo yezinyathelo ezimbili okwamanje yamukelwa iningi.Izinkampani ze-MIMkanye nabakhiqizi.

3 Indlela ye-Metamold

Inqubo ye-Metamold iyinqubo ye-MIM yokususa ugreasing eyakhiwe yi-Bloemacher elingana ne-BSAF yaseJalimane ekuqaleni kwawo-1990. Isici esiyinhloko sobuchwepheshe sale ndlela ukuthi isebenzisa i-polyether resin njenge-binder futhi ikhuthaza ukuwohloka ngokushesha endaweni ene-acidic. Ukusetshenziswa kwe-polyether resin ende njenge-binder, kusetshenziswa i-polyether resin polarity ukuxhuma i-metal powder, ingafaneleka ezinhlobonhlobo zezinhlobo zempushana. I-formaldehyde ibola ibe yi-formaldehyde ngaphansi kwe-catalysis yomoya we-asidi. Lokhu kusabela kokubola kwenzeka ngokushesha ngaphezu kuka-110 ℃, okuwushintsho oluqinile lwe-gas-2. I-BASF ekuqaleni yasebenzisa i-nitric acid njenge-catalyst, eyenza ukwehla kwamafutha ezingeni eliphansi kune-polymerization.

Izinga lokushisa elithambile le-aldehyde resin ligwema ukwakheka kwesigaba soketshezi, okuzuzisa ukulawula ukuwohloka kwe-billet eluhlaza futhi iqinisekise ukunemba kobukhulu ngemuva kokucwiliswa. I-catalytic degreasing yenziwa ku-interface ye-binder emkhathini 2. Ayikho igesi ku-billet yokwakha, futhi isivinini esithuthukisiwe sokusabela esibonakalayo singafinyelela ku-1 ~ 4mm/h. I-BASF kamuva yasungula indlela entsha yokusebenzisa i-oxalic acid njenge-catalyst, engasetshenziswa kuma-alloys aqinile nama-ceramics, ukwandisa ukusetshenziswa kwenqubo ye-Metamold. Isici esibalulekile sendlela ye-Metamold ukuthi ithatha i-catalyst degreasing, futhi akukho sigaba se-liquid esivela ngesikhathi sokunciphisa, okugwema ubuthakathaka ukuthi imikhiqizo ye-MIM ijwayele ukuguquguquka kanye nokulawula ukunemba kwe-dimensional kunzima. Kuyimpumelelo enkulu embonini ye-MIM, futhi ngenxa yokuthi i-catalytic degreasing, isikhathi sokwehlisa sifinyezwa kakhulu futhi izindleko ziyancipha. Usayizi omkhuluIzingxenye ze-MIMingakhiqizwa ngendlela ye-Metamold. Ngohlelo lwe-CREMER lokwehlisa amagremu kanye ne-sintering, ukukhiqizwa okuqhubekayo kungenzeka, okwenza i-MIM ibe yi-PM encintisana ngempela nobuchwepheshe bokwakha obuseduze nobuhlanzekile. Kodwa-ke, le ndlela inezinkinga ezithile ezifana nemishini yokugqwala kwe-asidi emkhathini kanye nokwelashwa kwegesi engcolile, futhi izindleko zokutshalwa kwezimali kwemishini eyinhloko ziphezulu uma kuqhathaniswa.

Izinkukhu zenkampani yase-Us-based i-Thermal Precision Technology yenze inqubo entsha ebizwa nge-precision metalukubumba umjovo we-powder(I-PPIM). Le nkampani ithi ukusebenzisa le nqubo kuzothuthukisa ubuchwepheshe be-MIM bungene enkathini entsha yezindleko eziphansi, ukunemba okuphezulu, isivuno esikhulu kanye nokujwayela imvelo. Izici eziyinhloko zobuchwepheshe zenqubo ye-PPIM zifakwe ezicini ezimbili, eyodwa ukusetshenziswa kwe-binder encibilikayo emanzini. I-binder iqukethe i-polyethylene glycol (PEG) njengento yokuqala kanye ne-polymer exhumene njenge-polyvinyl butyral (PVB) njengento yesibili. Ngakho-ke ukwehlisa amafutha kungahlukaniswa kube izinyathelo ezimbili, eyokuqala isuswa ngendlela yokuchithwa kwamanziPEG, lapho i-PVB ihlala isesimweni esiqinile esixhumene ngokuphambana. Ngakolunye uhlangothi, inqubo ye-PPIM yamukela i-powder yensimbi eyakhiwe ukuthunyelwa kobukhulu bezinhlayiyana ezibanzi, kusetshenziswa impushana eqinile, i-collocation ye-powder enhle, ukuze ukulayishwa kwempushana ekuphakeleni kwande, ngoba i-stainless steel powder ingafinyelela ku-74% (ingxenye yevolumu), inciphisa kakhulu ukuncipha kosayizi. Ngenxa yalokhu kuthuthukiswa okubili, ukunemba kobukhulu bomkhiqizo kungafinyelela ku-±011% ngokusebenzisaInqubo ye-PPIM, okuyiyona ephakeme kunazo zonke Izinqubo ze-MIMokwamanje.