Ƙirƙirar Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwaƙwalwa na Ƙaƙwalwa na Ƙaƙwalwa ) ya yi yana Ƙarfafawa

Aikace-aikacen fasahar yin gyare-gyaren yumbura

Tare da saurin haɓaka fasahar CIM, an yi amfani da samfuran gyare-gyaren yumbura a wasu fannoni

1. Ana samar da kashi ɗaya bisa uku na agogon Swiss ta amfani da fasahar yin gyare-gyaren foda ta yumbu, kuma kayan shine zirconia, kayan yumbu waɗanda ba sa sawa.
2. Japan tana da masana'antu masu haɗin fiber zirconia tare da diamita na ciki na 0.015mm.
3. {Asar Amirka ta fahimci samar da masu yankan gashi na zirconia da kuma yin amfani da kayan aikin silicon nitride a cikin injuna.
4. Ƙirƙirar rufin yumbu na madaidaicin mahaɗar helix biyu da bututun yumbu tare da zaren guda biyu a cikin dakin gwaje-gwaje na Maɓalli na Jiha na Ƙarƙashin Foda na Jami'ar Kudancin Kudancin China. Makarantar Kimiyya da Fasaha ta Jami'ar Kimiyya da Fasaha ta Huazhong ta sami nasarar haɓaka firikwensin zirconia ta hanyar amfani da fasahar CIM.

Basic tsari kwarara ginshiƙi na yumbu allura gyare-gyaren

Foda, daure, dispersant, mai -- hadawa -- degassing granulation -- allura --degreasing -- sintering -- Samfur gwajin

Fasahar yin gyare-gyaren yumbu don buƙatun foda na yumbu

1. Foda ya kamata a shirya musamman don babban iyaka cika yawa da ƙananan farashi;
2. Foda ba ya haɓaka;
3. Siffar foda ya fi mai siffar zobe;
4. Akwai isassun juzu'i tsakanin foda don gujewa nakasu ko rugujewar billet bayan an cire abin ɗaure. A mafi yawan lokuta, kusurwar gangaren yanayi ya kamata ya fi 55 °;
5. Domin sauƙaƙa saurin sintering, ya kamata ya kasance yana da ƙaramin matsakaicin matsakaicin matsakaici, gabaɗaya ƙasa da μm;
6. Foda kanta yana da yawa, ba tare da pores na ciki ba;
7. Fuskar foda yana da tsabta kuma baya amsa sinadarai tare da mai ɗaure.

Allurar gyare-gyaren tsarin ɗaure

Masu ɗaure a cikin gyare-gyaren allura suna da ayyuka na asali guda biyu.

Da farko, ana iya haɗa foda a ko'ina a cikin matakin gyaran allura, kuma foda na iya samun ruwa mai kyau bayan dumama;

Abu na biyu, mai ɗaure zai iya kula da siffar jiki bayan gyaran allura da kuma lokacin ragewa.

Ana iya cewa mai ɗaure shi ne jigon kuma maɓalli a fasahar yin gyare-gyaren foda, kuma kowane haɓakawa da ci gaban aikin gyaran allura yana tare da haihuwar sabon tsarin haɗin gwiwa. A cikin CIM , saboda girman ƙwayar foda ya fi ƙanƙanta fiye da na ƙarfe foda allura gyare-gyare, da fluidity na foda kanta ba shi da kyau, da kuma rata tsakanin foda da dauri bayan hadawa ne sosai kananan, sakamakon da wuya degreasing, wanda ya sa a gaba mafi bukatar buƙatun ga mai ɗaure. Don haka, a matsayin mai ɗaure gyare-gyaren yumbu, dole ne a cika waɗannan sharuɗɗan:

1. Kyakkyawan motsi. Danko na gyare-gyaren allura ya kamata ya zama matsakaici, danko yana da yawa, foda ba za a iya tarwatsawa sosai a cikin ɗaure ba, ba kawai da wuyar haɗuwa ba, amma har ma da wuya a sami nau'i mai nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i) wanda zai iya haifar da lahani; Ƙananan danko zai haifar da delamination na yumbu foda da ɗaure, kuma danko ba zai iya canzawa da yawa tare da zafin jiki ba, in ba haka ba lahani zai faru.

2. Dole ne mai ɗaure ya iya jika foda da kyau kuma yana da tasiri mai kyau a kan foda. Yawancin lokaci don inganta aikin jika na mai ɗaure, ya kamata a ƙara wasu abubuwa masu aiki na saman don rage danko na cakuda kuma ƙara yawan ruwa. A lokaci guda kuma, mai ɗaure yana jika ɓangarorin don samar da ƙarfin capillary don ɗaukar barbashi da kiyaye jiki daga lalacewa. Domin tabbatar da kwanciyar hankali na billet, foda ya kamata ya zama maras kyau dangane da mai ɗaure.

3. Mai ɗaure ya ƙunshi nau'ikan kwayoyin halitta masu yawa. Yana da wahala ga mai ɗaure kwayoyin halitta guda ɗaya don biyan buƙatun ruwa, kuma bayan ɗaya daga cikin abubuwan da aka lalata, an sami buɗaɗɗen porosity, wanda ya dace da keɓance sauran ɗaurin. Aiki ya tabbatar da cewa yawan adadin kayan aikin da yawa da sauri fiye da na kayan haɗin kayan haɗin guda da lahani basu da yawa. Tabbas, polymers na kwayoyin halitta tare da nau'i-nau'i masu yawa sun dace.

4. Mai ɗaure yana da haɓakar haɓakar thermal da ƙarancin haɓaka haɓakar thermal. Wannan ba wai kawai yana guje wa lahani da damuwa na thermal ke haifarwa ba, har ma yana rage zafin zafin jiki ga jiki kuma yana rage lahani.

5. Bugu da ƙari, mai ɗaure kuma dole ne ya zama mara guba, mara gurɓatacce, maras kyau, rashin shayar da danshi, kuma aikin dumama na cyclic ba ya canzawa.

Kwatanta fa'idodi da rashin amfani na tsarin ɗaure daban-daban

An haɗa ɗaure da yawa gama-gari a cikin CIM

A cikin 'yan shekarun nan, mafi hankula binders sau da yawa amfani da daban-daban yumbu foda gyare-gyaren gyare-gyare a cikin duniya. Kamar yadda ake iya gani daga tebur, masu ɗaure da aka yi amfani da su a cikin CIM galibi suna cikin tsarin dumbin abubuwa na thermoplastic.

Shiri na CIM cakuda

Cakuda shine cakuda foda da ɗaure. A cikin dukkan tsarin gyaran allura, shirye-shiryen foda da cakuda polymer binder shine ɗayan mahimman matakai. Tsarin yana buƙatar cakuda don samun kyawawan dabi'u, kyawawan kaddarorin rheological da kyawawan halayen lalata.

Don fasahar hadawa da aka zaɓa, babban aikin shine daidaita ƙimar, zazzabi da lokaci. Koyaya, idan saurin haɗuwa da zafin jiki sun yi ƙasa sosai, komai tsawon lokacin haɗuwa ba zai iya zama iri ɗaya ba.

Matsalar rheological na PIM shine yafi kimantawa da halayyar danko na cakuda.

Gyaran allura

Manufar yin gyare-gyaren allura shine don samun jikin da ke ƙulla CIM ba tare da lahani ba da tsari iri ɗaya a cikin siffar da ake so. Za a iya yin allurar da aka shirya gabaɗaya a cikin na'ura mai yin gyare-gyare na filastik na yau da kullun, ko kuma ana iya allurar a cikin injin allurar foda na musamman. Siffofin aiwatar da gyare-gyare gabaɗaya sun haɗa da zafin allura, matsa lamba na allura, saurin allura, matsin lamba, riƙewar lokacin sanyaya da zazzabi mai ƙima. Idan sigogin tsari ba su da kyau sosai, yana da sauƙi don samar da lahani daban-daban. Ba za a iya kawar da lahani na allura a cikin tsari na gaba ba, don haka dole ne a kula da wannan tsari sosai, wanda ke da mahimmanci don inganta yawan samfurori da amfani da kayan aiki.

Zirconia allura gyare-gyare sassa

Sarrafa lahani a cikin tsarin yin gyare-gyaren yumbura

Ana iya la'akari da kula da lahani a cikin tsarin gyaran gyare-gyaren allura daga bangarori biyu: a gefe guda, an saita dangantaka tsakanin zafin jiki, matsa lamba da lokaci; Wani al'amari shi ne kwararar abinci a cikin rami na mold lokacin da ake cikawa. Saboda yawancin samfuran CIM ƙananan sassa ne tare da sifofi masu rikitarwa da madaidaicin buƙatun, kwararar cakuda a cikin rami mai ƙyalƙyali ya haɗa da al'amurran ƙirar ƙira, gami da wurin tashar tashar abinci, tsawon tashar kwarara, wurin rami mai huɗa, da dai sauransu, wanda ke buƙatar fahimtar ma'auni na cakuda kwararar dukiya, yanayin zafin jiki a cikin rami mold da rarraba damuwa na saura.

Ceramic sintering

Tsarin sintiri shine akasari don sarrafa girman girman hatsin yumbu, samun kayan aikin lokaci da ake buƙata, da kuma tabbatar da girman ɗimbin yawa da yumbu sintered jiki.

Sintering tsari guda biyu muhimman sigogi: sintering zafin jiki da sintering lokaci

Sabon tsarin yin gyare-gyaren yumbura

Foda co-injection molding (PCM) wani sabon ci gaban foda allura gyare-gyare.Wannan dabarar tana amfani da injin gyare-gyaren allura mai ganga biyu don yin allurar gaurayawan foda/daure daban-daban guda biyu a jere a cikin kogon gyatsa. Wannan tsari yana ba da damar yin maganin saman yayin yin allura, maimakon bayan an shirya samfurin da aka gama. Ana iya kammala shirye-shiryen da jiyya na saman samfurin a cikin tsari guda ɗaya, wanda kansa yana da kyau sosai daga ra'ayi na fasaha da tattalin arziki.

Fasahar yin gyare-gyaren ƙananan matsa lamba, dangane da tsarin allura da kanta, tsarin allurar ƙarancin matsin lamba ya fi allurar matsa lamba.Ana iya kammala ciyar da danko na gabaɗaya tsakanin 1.5-4.0Pa.s ta iska mai matsa lamba 0.8Mpa, wanda zai iya cire tsarin hydraulic, piston allura da tsarin haɗin sanda a cikin kayan gargajiya. Ana iya ganin cewa fa'idodin allura mai ƙarancin ƙarfi shine ƙarancin matsin lamba a cikin allurar kore, ƙaramin ƙura, ciyarwar da ba ta da ƙarfi, guje wa gurɓataccen abinci da lalacewa ta piston allura da rashin rabuwa da foda / ɗaure. Bugu da ƙari, akwai ƙananan amfani da makamashi, ƙananan kayan aiki, tsari mai sauƙi da ƙananan farashi.