1.Wiech tsari

Tsarin Wiech yana wakiltar wani haƙƙin mallaka wanda Wiech ya ƙirƙira a cikin 1980 kuma an inganta shi sau da yawa. Tsarin mannewa na asali na tsarin Wiech ya ƙunshi kakin paraffin da resin thermoplastic. Ana gauraya abin ɗaure da foda akan na'urar juzu'i nau'in "Z" ko "Σ". Farkon ɓarkewar tsari mataki biyu ne wanda aka fara sanya billet ɗin MIM a cikin akwati mai dumama kuma a yi zafi zuwa ko sama da yanayin zafi na ɗaurin, sannan a hankali ƙara sauran ƙarfi a cikin sigar gas zuwa cikin akwati da billet ɗin yake. Gaseous ƙarfi ya shiga cikin kafa billet don narkar da abin daure, kuma idan ya narkar da zuwa wani iyaka, da ƙarfi bayani na daure zai fita daga forming billet. Samfuran da aka cire tare da yawancin abin da aka cire ana nitsewa a cikin ruwa mai ƙarfi don cire sauran ɗaurin. A ƙarshe, billet ɗin da aka ƙirƙira ana preheated don cire wasu ragowar abin ɗaure da sauran ƙarfi, kuma samfurin da aka gama yana sintered. Tsarin yana ɗaukar kwanaki 3 don rage ƙanƙarar gaseous ita kaɗai

Ingancin ragewa yana da ƙasa sosai. Yayin da zafin jiki na raguwa ya fi girma fiye da zafin jiki na mai ɗaure, nakasar yana da tsanani. An canza tsarin daga baya zuwa duk raguwa ta hanyar bazuwar thermal kuma lokacin raguwa ya ragu sosai. A farkon ci gaban masana'antar MIM, yawancin kamfanoni sun karɓi tsarin Wiech. Har zuwa yanzu, wasu kamfanoni har yanzu suna amfani da tsarin Wiech don samarwa. Duk da haka, tsarin Wiech yana da matsaloli irin su babban damuwa na allura kore blank, mai sauƙi don fashewa da lalacewa, kuma yana da wuya a samar da sassa tare da girman girma.

2 Injectamax tsari

Johnson na AMAX Metal Injection Molding USA ya ƙirƙira tsarin Injectamax a cikin 1988. Babban fa'idar aikin shine cewa ɗaurinsa ya ƙunshi paraffin, man kayan lambu, da polymer. Man kayan lambu ruwa ne idan aka yi masa allura da sanyaya, wanda hakan ke sa adadin billet ɗin ya canza kaɗan kafin da kuma bayan yin allurar, kuma yana rage damuwa na ciki a cikin billet ɗin. Lokacin raguwa, ana amfani da sauran ƙarfi kamar trichloroethane don narkar da man kayan lambu da kakin sinadarai da farko, yayin da ba a narkar da abubuwan da ba za a iya narkewa ba. Wannan yana buɗe tashar pore sannan ya cire ragowar ɗaure ta hanyar rage zafin zafi. Duk lokacin rage ragewar lokaci gajere ne, kawai 6h, ɗaya ne

Hanya mafi sauri na ragewa. Saboda saukinsa, ƙananan saka hannun jari da ingantaccen inganci, ƙaƙƙarfan gurɓataccen abu da rage ragewar thermal degreasing matakai biyu a halin yanzu galibi ana karɓar su.Kamfanin MIMda masana'antun.

3 Hanyar Metamold

Tsarin Metamold wani tsari ne na rage katsewa na MIM wanda Bloemacher yayi daidai da BSAF a Jamus a farkon 1990s. Babban fasalin fasaha na wannan hanya shine cewa yana amfani da resin polyether a matsayin mai ɗaure kuma yana hana raguwa da sauri a cikin yanayin acidic. Amfani da dogon sarkar polyether guduro a matsayin mai ɗaure, ta amfani da polyether resin polarity don haɗa foda na ƙarfe, zai iya dacewa da nau'in foda iri-iri. Formaldehyde yana bazuwa zuwa formaldehyde a ƙarƙashin catalysis na yanayin acid. Wannan bazuwar dauki yana faruwa da sauri sama da 110 ℃, wanda shine iskar gas-2 mai ƙarfi kai tsaye. BASF ta fara amfani da acid nitric a matsayin mai haɓakawa, wanda ke haifar da raguwa a ƙaramin matakin fiye da polymerization.

Zazzabi mai laushi na resin aldehyde yana guje wa samuwar lokaci na ruwa, wanda ke da fa'ida don sarrafa nakasar koren billet kuma yana tabbatar da daidaiton girman bayan sintering. The catalytic degreasing ne da za'ayi a ke dubawa na mai ɗaure a cikin yanayi 2. Babu iskar gas a cikin kafa billet, da kuma ci gaba gudun da dauki dubawa iya isa 1 ~ 4mm / h. Daga baya BASF ta haɓaka sabuwar hanyar yin amfani da acid oxalic a matsayin mai haɓakawa, wanda za'a iya amfani da shi zuwa ga allurai masu ƙarfi da yumbu, faɗaɗa aikace-aikacen tsarin Metamold. Wani muhimmin fasali na hanyar Metamold shine cewa yana ɗaukar rage rage kuzari, kuma babu wani lokaci na ruwa da ya bayyana yayin ragewa, wanda ke guje wa raunin cewa samfuran MIM suna da saurin lalacewa kuma sarrafa daidaiton girman yana da wahala. Yana da babban ci gaba a cikin masana'antar MIM, kuma saboda yana rage yawan raguwa, lokacin raguwa yana raguwa sosai kuma an rage farashin. Girma mai girmaMIM sassaAna iya samar da shi ta hanyar Metamold. Tare da ci gaba da rage raguwa da tsarin CREMER, ci gaba da samarwa yana yiwuwa, yana mai da MIM babbar gasa PM kusa da fasahar ƙira. Koyaya, wannan hanyar tana da wasu matsaloli kamar kayan aikin lalata yanayi na acid da jiyya na iskar gas, kuma farashin saka hannun jari na kayan aikin farko yana da yawa.

Hens na Kamfanin Thermal Precision Technology na Us-Based ya kirkiro wani sabon tsari mai suna precision metalfoda allura gyare-gyare(PPIM). Kamfanin ya yi iƙirarin cewa yin amfani da wannan tsari zai ƙaddamar da fasahar MIM zuwa wani sabon zamani na ƙananan farashi, daidaitattun ƙididdiga, yawan amfanin ƙasa da daidaita yanayin muhalli. Babban halayen fasaha na tsarin PPIM yana kunshe a cikin bangarori biyu, daya shine amfani da maɗaurin ruwa mai narkewa. Mai ɗaure ya ƙunshi polyethylene glycol (PEG) a matsayin kashi na farko da polymer crosslinked kamar polyvinyl butyral (PVB) a matsayin kashi na biyu. Don haka za a iya raba raguwa zuwa matakai biyu, na farko an cire shi ta hanyar narkar da ruwa PEG, inda PVB ya kasance a cikin ƙasa mai haɗin gwiwa. A daya hannun, da PPIM tsari rungumi dabi'ar karfe foda hada da ƙaddamar da fadi da barbashi size, ta yin amfani da m foda, lafiya foda collocation, sabõda haka, loading na foda a cikin ciyar da aka ƙara, domin bakin karfe foda zai iya kai 74% (girman juzu'i), ƙwarai rage girman shrinkage. Saboda waɗannan haɓakawa guda biyu, daidaiton girman samfurin na iya kaiwa ± 011% ta amfaniTsarin PPIM, wanda shi ne mafi girma a cikin dukan Hanyoyin ciniki na MIMa halin yanzu.