Shell mold castingwani tsari ne wanda yashi ya haɗu da gudan thermosetting yana da izinin shiga cikin farantin ƙarfe mai zafin ƙarfe mai zafi, don haka an samar da siririn ƙwanƙolin ƙarfi da keɓaɓɓen ƙira a kewayen pattem. Daga nan sai a cire kwandon daga abin da ya dace sannan a cire jurewa da jawowa a tare a ajiye a cikin leda tare da kayan da ake bukata na adanawa kuma zuban narkakkar karfen din a zuba.
Gabaɗaya, busassun yashi mai kyau (90 zuwa 140 GFN) wanda ba shi da yumɓu ana amfani dashi don shirya yashi wanda zai gyara shi. Girman hatsi da za a zaɓa ya dogara da ƙarshen farfajiya da ake buƙata a kan simintin gyaran kafa. Kyakkyawan girman hatsi yana buƙatar babban guduro, wanda ke sa tsaran yayi tsada.
Abubuwan roba da aka yi amfani da su a cikin kwasfa na zafin jiki sune ainihin ƙwayoyin zafin jiki, waɗanda zafin rana ke daɗa tauraruwa ba zai yiwu ba. Abubuwan da akafi amfani dasu sune phenol formaldehyde resins. Haɗe da yashi, suna da ƙarfi sosai da juriya zuwa zafi. Abubuwan da ke amfani da sinadarin phenolic wadanda aka yi amfani da su a cikin kwasfa galibi galibi suna daga nau'ikan matakai biyu, wato, resin yana da fanool mai yawa kuma yana yin abubuwa kamar kayan zafi na thermoplastic. A yayin ruɓewa da yashi resin yana haɗuwa da mai kara kuzari kamar hexa methylene tetramine (hexa) a cikin kashi kimanin 14 zuwa 16% don haɓaka halaye na yanayin zafi. Yanayin zafin jiki na waɗannan zai kasance kusan 150 C kuma lokacin da ake buƙata zai zama sakan 50 zuwa 60.
Amfanin Shell Mould Casting Process
1. Shell-mold castings gabaɗaya sun fi daidaitattun abubuwa daidai fiye da ƙirar yashi. Zai yiwu a sami haƙuri na +0.25 mm don ƙera ƙarfe da +0. 35 mm don simintin gyare-gyaren baƙin ƙarfe a ƙarƙashin yanayin aiki na yau da kullun. Game da yanayin kusan ƙwanan ƙwanan ƙwanan dutse, mutum na iya samun sa a cikin kewayon +0.03 zuwa +0.13 mm don takamaiman aikace-aikace.
2. Za a iya samun danshi mai santsi a cikin simintin gyare-gyare. Wannan yana samun nasara ne ta hanyar hatsi mafi kyau wanda aka yi amfani dashi. Hankula na kewayon yanayin ƙananan tsari shine na 3 zuwa 6 na ƙaramar madubi.
3. Tsararren kusurwa, waɗanda suke ƙasa da jingin yashi, ana buƙatar su a cikin ƙwanan ƙwanan baya. Rage cikin kusurwoyin kusurwa na iya zama daga 50 zuwa 75%, wanda ke adana yawancin kayan aikin da farashin kayan mashin na gaba.
4. Wani lokaci, ana iya kawar da ƙwayoyi na musamman a cikin gyaran kwasfa. Tunda yashi yana da ƙarfi mai ƙarfi za'a iya tsara sifa a cikin hanyar da za'a iya ƙirƙirar cavities na ciki kai tsaye tare da buƙatar maƙallan kwasfa.
5. Hakanan, sassan sirara sosai (har zuwa 0.25 mm) na nau'ikan kawunan Silinda masu sanyaya iska ana iya yin su ta hanyar yin kwasfa saboda tsananin ƙarfin yashin da ake amfani da shi.
6. Tsawancin harsashi yana da yawa kuma saboda haka babu haɗarin gas.
7. Yaran yashi kadan ne yake bukatar amfani dashi.
8. Yin aiki yana yiwuwa a sauƙaƙe saboda sauƙin sarrafawa da ke ƙunshe da gyarar harsashi.
Iyakokin Shell Mould Casting Process
1. Pattens suna da tsada sosai sabili da haka suna da tattalin arziki kawai idan anyi amfani dasu a cikin sikelin girma. A cikin aikace-aikacen yau da kullun, gyare-gyaren harsashi ya zama tattalin arziƙi akan gyaran yashi idan abin da ake buƙata ya kasance sama da guda 15000 saboda tsadar tsarin mafi girma.
2. Girman simintin gyaran kafa da aka samu ta hanyar gyaran kwasfa yana da iyaka. Gabaɗaya, ana iya yin 'yan wasa da nauyinsu yakai kilogiram 200, kodayake a cikin ƙananan yawa, ana yin simintin gyaran sama da nauyin kilogiram 450.
3. Ba za a iya samun sifofi masu rikitarwa ba.
4. Ana buƙatar ƙarin kayan aiki na zamani don kula da kayan kwalliyar kwalliya kamar waɗanda ake buƙata don samfurin ƙarfe mai zafi.
Post lokaci: Dec-25-2020