Ya kamata a yi amfani da ƙarfe na simintin simintin gyare-gyare lokacin da ƙarfin simintin ya yi girma kuma amfani da baƙin ƙarfe ba zai iya cika buƙatun ba. Duk da haka, ruwan narkakkar ƙarfe na simintin ƙarfe ba shi da kyau kamar na simintin ƙarfe, don haka kada kaurin tsarin zubewa ya zama ƙanƙanta kuma siffar kada ta kasance mai rikitarwa. Lokacin da abun cikin siliki ke sarrafa shi a mafi girman iyaka, za a iya inganta ruwan narkakkar karfe.
Guduro mai rufi yashi harsashi mold simintin gyaran kafawani tsari ne wanda yashi gauraye da resin thermosetting aka bari ya hadu da wani zazzafan farantin karfen karfe, ta yadda za'a samu harsashi mai karfi da bakin ciki a kusa da ginshikin. Sa'an nan kuma a cire harsashi daga tsarin kuma a cire cope da ja tare a ajiye a cikin flask tare da kayan da ake bukata na baya kuma a zuba narkakken karfe a cikin mold.
Gabaɗaya, bushe da yashi mai kyau wanda ba shi da yumbu ana amfani da shi don shirya yashin ƙera harsashi. Girman hatsin da za a zaɓa ya dogara da ƙarshen saman da ake so akankarfe astings. Matsakaicin girman hatsi yana buƙatar babban adadin guduro, wanda ke sa ƙirar ta yi tsada.
Resins na roba da aka yi amfani da su wajen gyare-gyaren harsashi su ne ainihin resins na thermosetting, waɗanda ke yin taurare ta hanyar zafi. Abubuwan resin da aka fi amfani dasu sune resin phenol formaldehyde. Haɗe da yashi, suna da ƙarfi sosai da juriya ga zafi. Resin phenolic da ake amfani da su wajen gyare-gyaren harsashi yawanci na nau'in mataki ne guda biyu, wato, guduro yana da phenol da ya wuce kima kuma yana aiki kamar kayan zafi. A lokacin da ake shafa da yashi, ana haɗe resin tare da mai kara kuzari kamar hexa methylene tetramine a cikin wani nau'i na kusan 14 zuwa 16% don haɓaka halayen thermosetting. Matsakaicin zafin jiki na waɗannan zai zama kusan 150 C kuma lokacin da ake buƙata zai zama 50 zuwa 60s.
Fa'idodin Simintin Rufe Sand Shell Mold:
1. Resin Rufaffen Sand Shell-mould simintin gyare-gyare gabaɗaya sun fi daidai girma fiye da simintin yashi. Yana yiwuwa a sami juriya na +0.25 mm don simintin ƙarfe da +0. 35 mm don simintin ƙarfe mai launin toka a ƙarƙashin yanayin aiki na yau da kullun. A cikin yanayin ƙirar harsashi na kusa, ana iya samun shi a cikin kewayon +0.03 zuwa +0.13 mm don takamaiman aikace-aikace.
2. Za a iya samun wuri mai laushi a cikin simintin harsashi. Ana samun wannan da farko ta mafi girman girman hatsi da aka yi amfani da shi. Matsakaicin kewayon rashin ƙarfi shine na tsari na 3 zuwa 6 microns.
3. Matsakaicin kusurwoyi, waɗanda suka yi ƙasa da simintin yashi, ana buƙata a cikin ƙirar harsashi. Rage kusurwoyin daftarin zai iya kasancewa daga 50 zuwa 75%, wanda ke adana tsadar kayan aiki da kuma farashin injina na gaba.
4. Wasu lokuta, ana iya kawar da maƙala na musamman a cikin gyare-gyaren harsashi. Tun da yashi yana da ƙarfi mai ƙarfi za a iya ƙirƙira ƙirar ta yadda za a iya kafa kogon ciki kai tsaye tare da buƙatun harsashi.
5. Har ila yau, sassa na bakin ciki sosai (har zuwa 0.25 mm) na nau'in kawunan silinda mai sanyaya iska za a iya yin shi da sauri ta hanyar gyare-gyaren harsashi saboda ƙarfin yashi da ake amfani da shi don yin gyare-gyare.
6. Permeability na harsashi yana da girma kuma sabili da haka babu iskar gas da ke faruwa.
7. Ana buƙatar amfani da yashi kaɗan.
8. Injiniya yana yiwuwa a shirye saboda sauƙin sarrafawa da ke cikin gyare-gyaren harsashi.
Raw Materials for Guduro Rufaffen Yashi Tsari:
• Ƙarfe na Simintin gyare-gyare: Ƙarfe mai launin toka, Ƙarfin Simintin Ruwa.
• Ƙarfe Karfe da Ƙarfe: Ƙananan Karfe Carbon, Matsakaicin Karfe Carbon Karfe da Babban Carbon Karfe daga AISI 1020 zuwa AISI 1060; 20CrMnTi, 20SiMn, 30SiMn, 30CrMo, 35CrMo, 35SiMn, 35CrMnSi, 40Mn, 40Cr, 42Cr, 42CrMo...da sauransu akan buƙata.
• Bakin Karfe: AISI 304, AISI 304L, AISI 316, AISI 316L da sauran bakin karfe.
• Simintin Aluminum Alloys.
• Brass & Copper.
• Sauran Kayayyaki da Ka'idoji akan buƙata
▶ Gudun Yashi Mai Rufe Ƙarfin Simintin Yashi:
• Girman Girma: 1,000 mm × 800 mm × 500 mm
• Nauyin Nauyi: 0.5 kg - 100 kg
• Yawan Shekara: ton 2,000
Haƙuri: Akan Buƙatar.
▶ DubawaRufaffen Yashi Simintin gyare-gyare:
• Spectrographic da manual quantitative analysis
• Binciken Metallographic
• Brinell, Rockwell da Vickers duba taurin
• Binciken kayan aikin injiniya
• Gwajin tasiri mara ƙarancin zafi da na al'ada
• Duban tsafta
• Binciken UT, MT da RT
▶ Hanyoyin Simintin Yashi Mai Rufe:
✔ Yin Samfurin Karfe. Yashin guduro mai rufi da aka rigaya yana buƙatar dumama a cikin ƙirar, don haka ƙirar ƙarfe sune kayan aikin da ake buƙata don yin simintin gyare-gyaren harsashi.
✔ Yin Yashi Mold mai rufi. Bayan shigar da ƙirar ƙarfe a kan injin gyare-gyaren, za a harbe yashin guduro mai rufi a cikin tsarin, kuma bayan dumama, murfin guduro zai narke, sa'an nan kuma yashin yashi ya zama harsashi mai yashi da murhu.
✔ Narkar da Karfe na Cast. Yin amfani da tanderun shigar da bayanai, kayan za su narke su zama ruwa, sa'an nan kuma ya kamata a bincika abubuwan haɗin sinadarai na baƙin ƙarfe don dacewa da lambobi da kaso da ake buƙata.
✔ Zuba Karfe. Lokacin da baƙin ƙarfe narke ya cika buƙatun, to, za a zuba su a cikin kwasfa na harsashi. Dangane da nau'ikan ƙirar simintin gyare-gyare daban-daban, za a binne gyare-gyaren harsashi a cikin koren yashi ko kuma a tara su ta yadudduka.
✔ Fashewar Harbi, Nika da Tsaftacewa. Bayan sanyaya da ƙarfi na simintin gyaran kafa, yakamata a yanke masu tashi, kofofin ko ƙarin ƙarfe kuma a cire su. Sannan za a tsaftace simintin ƙarfe da kayan leƙen yashi ko injunan fashewar fashewar abubuwa. Bayan an nika kan gating da layin rabuwa, sassan simintin da aka gama za su zo, suna jiran ƙarin matakai idan an buƙata.
▶ Tsarin Simintin Fita
• Deburring & Tsaftacewa
• Harbin fashewa / Yashi Peening
• Maganin zafi: daidaitawa, Quench, Tempering, Carburization, Nitriding
• Maganin Sama: Passivation, Andonizing, Electroplating, Hot Zinc Plating, Zinc Plating, Nickel Plating, Polishing, Electro-Polishing, Painting, GeoMet, Zintec.
• CNC machining: Juyawa, Niƙa, Lathing, hakowa, Honing, nika.
▶ Me Yasa Ka ZabaRMC Foundrydon Abubuwan Simintin Gyaran Shell?
✔ Daidaitacce kuma saboda haka babban amfani da kayan abu. Za ku sami samfuran siffar gidan yanar gizo ko kusa-net bayan yin simintin gyare-gyaren harsashi, dangane da buƙatun masu amfani da ƙarshen, ba za a sami ko ƙanƙanta aikin injin da ake buƙata ba.
✔ Mafi kyawun aikin saman. Godiya ga sabbin kayan fasaha don gyare-gyaren, simintin gyare-gyaren daga gyare-gyaren harsashi suna da kyau sosai kuma mafi girman daidaito.
✔ Kyakkyawan zaɓi na daidaitacce idan aka kwatanta da yashi da zuba jari. Simintin gyare-gyaren harsashi yana da kyakkyawan aiki da saman sama fiye da simintin yashi, yayin da yake da ƙarancin farashi fiye da madaidaicin simintin saka hannun jari.
