Kayan aikin simintin kakin zuma da aka rasa ba wani akwatin sana'a ba ne kawai - shine gada ta farko tsakanin zana ra'ayi da riƙe zoben ƙarfe da aka gama a hannunku. Mun kalli masu farawa suna buɗe waɗannan kayan aikin suna tsammanin sihiri, kawai don yashi samfurin kakin zuma na uku da ya gaza a karfe 2 na safe, suna mamakin dalilin da ya sa sprue ya karye, dalilin da yasa ƙirar ta fashe, ko me yasa azurfar ta ƙi kwarara. Wannan takaici ya ƙare a nan. Wannan ba ka'idar ba ce. Shi ne abin da muka lura a cikin kewayon samfuri guda 47 tare da ɗaliban ƙirar kayan ado, masu sha'awar sha'awa, da masu kafa micro-studio-kowane lokaci suna daidaita daidaito tsakanin samun dama da amincin ƙarfe.
Me yasa "Mafari" ba ya nufin "Mafari"
A gaskiya kit ɗin simintin kakin zuma ya ɓace don sababbin masu shigowa dole ne su magance matsalolin da ba za a iya sasantawa ba: juriya na zafin zafi a cikin saka hannun jari, halin ƙonawa da za a iya faɗi, da kwanciyar hankali ta hanyar sanyaya. Yawancin kits suna tsallake takaddun bayanan kayan gabaɗaya - jera "zuba jari na tushen plaster" ba tare da ƙayyadaddun yarda da ASTM C22 ko ISO 6872 ba. Namu yayi. The refractory foda ya hadu da ISO 6872 Nau'in IV ƙayyadaddun bayanai, tare da ƙarfin kore na ≥12 MPa da haɓakar thermal ≤0.15% a 700 ° C. Wannan lambar tana da mahimmanci: shine bambanci tsakanin rami mai tsafta da gurɓataccen tsari wanda ke kama kumfa a kusa da saitin bezel.
Mun gwada nau'ikan kakin zuma guda shida gefe-da-gefe. Madaidaicin microcrystalline waxes ya yi laushi ƙasa da 45°C — ba shi da kwanciyar hankali don cikakken filigree. Kit ɗin yana amfani da haɗaɗɗen mallakar mallaka tare da 58% beeswax, 32% carnauba, da 10% dammar resin - yana narkewa sosai a 63 ° C, yana riƙe da layukan da ke ƙarƙashin 0.3 mm, kuma yana ƙonewa da tsabta a 650 ° C ba tare da ragowar carbon ba. Za ku ga wannan lokacin da kuka karya buɗaɗɗen filashin ku na farko: babu baƙar sot da ke manne da saman azurfa, babu buƙatar tsinke mai ƙarfi.
Abin da ke Ciki-da Abin da Ba a Boye ba a Fine Print
Wannan ba akwatin alkawari ba ne. Kowane sashi yana aiki da ingantaccen aiki:
- Kayan aikin sassaƙa kakin zuma (yanki 5): Carbide-tipped, ba bakin karfe ba - saboda tukwici masu laushi suna lalacewa akan kakin zuma mai wuya, yana haifar da alamun zazzagewa waɗanda ke maimaita cikin simintin ku na ƙarshe.
- Zuba jari (1 kg): Pre-mixed, pre-sieved, danshi-sarrafa zuwa ± 0.5% RH-ba zato hadawa rabo; kawai ƙara distilled ruwa a 22 ° C
- Wutar lantarki (2L)Jikin gilashin Borosilicate tare da gasket silicone wanda aka ƙididdige zuwa 90 kPa-mahimmanci don cire iskar da aka kama daga ɓoyayyen ɓoyayyen nau'ikan.
- Burnout kiln ramp profile: Zagayewar mataki na 3 da aka riga aka tsara (bushewa → dewaxing → sintering) an tabbatar da kawar da karyewar damuwa na thermal a cikin flasks
- Crucible & tongs: Silicon carbide-lineed, rated for 1100°C — yana rike da azurfa, tagulla, da tagulla ba tare da gurɓata gurɓataccen ƙarfe ba.
Bace? A "starter silver ingot." Yayi kyau. Azurfa mai tsabta tana narkewa a 961°C-amma masu farawa da wuya su sami daidaiton yanayin zafi ƙasa da 1050°C. Ba tare da takamaiman pyrometry ba, suna samun porosity ko sanyi rufe. Madadin haka, kit ɗin ya haɗa da ingots ɗin gwajin jan ƙarfe. Jagorar ruwa da mold sun cika da jan karfe da farko. Sa'an nan girma.
Ainihin Ƙwallon Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙaƙwalwar Tsari ne
Wasu na iya jayayya cewa bugu na 3D na dijital ya sa kakin zuma ya ɓace. Amma ga abin da muka auna a ainihin amfani da ɗakin studio: Don zoben da ke ƙarƙashin girman 8 tare da bayanan asymmetrical, ƙirar resin da aka buga na 3D yana buƙatar ƙarin 37% ƙarin shigar da simintin simintin fiye da kakin zuma da aka sassaƙa da hannu. Me yasa? Layin Layer na 0.05 mm na resin suna haifar da ƙananan ƙugiya waɗanda ke kama mahadi masu gogewa, suna tilasta ƙarin lokutan buffing da asarar ƙarfe mafi girma.
Yin sassaƙa da hannu yana koyar da daidaito, rarraba nauyi, da fahimtar sararin samaniya mara kyau-babu ƙwarewar software na yanki. Kuma lokacin da samfurin kakin zuma na farko na ɗalibi ya rushe yayin ƙonawa, suna koya game da ƙimar kaurin bangon kakin zuma-zuwa-flask (mafi ƙarancin 6 mm), ba kawai yadda ake buga “bugu ba.” Wannan madauki na ra'ayi na tactile ba zai iya maye gurbinsa ba. Mun gina littafin koyarwa a kusa da yanayin gazawa-ba matakai ba. Shafi na 12 baya cewa "haɗa sprue." Ya ce: "Idan sprue ɗinku ya karye yayin cika flask, duba zazzabi na kakin zuma (dole ne ya zama> 50 ° C) da diamita sprue (≥2.5 mm don zobe)."
Daga Fila na Farko zuwa Kayan Ado Na Aiki — Babu Kulawa
Wannan kit ɗin simintin kakin zuma ya ɓace yana ɗaukan sifili kafin gogewar ganowa-amma babu haƙuri ga gajerun hanyoyi. Ya haɗa da hygrometer calibrated saboda zafi sama da 60% RH yana haifar da slurry zuba jari don saita da sauri, kama iska. Yana jigilar kaya tare da 0.01 mm dial caliper-ba a matsayin alatu ba, amma saboda kauri na zobe a ƙarƙashin 1.2 mm ya kasa yin gwajin gwaji a 120 N. Waɗannan lambobin ba su da sabani. An zana su daga ASTM F2590 (ka'idodin dorewar kayan ado) kuma an tabbatar da su a cikin ƙayyadaddun kayan aikin mu na ISO 9001 a Qingdao-inda muke jefa gidajen famfo don rijiyoyin mai na bakin teku ta amfani da sinadarai iri ɗaya na saka hannun jari da ka'idoji.
Ba kuna siyan kayan sha'awa ba. Kuna samun damar horon tsarin masana'antu, wanda aka rage ba tare da dilution ba. Iri guda cobalt-alloy nozzles mu injin don tsarin na'ura mai aiki da karfin ruwa dogara a kan wannan thermal fadada iko, iri daya daure burnout kinetics, iri iri mold dabaru. Ba a keɓance madaidaicin kwangilar dala miliyan ba. Yana farawa inda kakin zuma ya hadu da jarin.
Fara da kakin zuma. Mutunta lanƙwan ƙonawa. Amince da injin. Jefa zobenka na farko-ba kamar yadda ake yi ba, amma a matsayin hujjar cewa sarrafawa yana farawa tun kafin ƙarfe ya gudana.
