I-vacuum casting inamanye amagama amaningi afana ne-vacuum sealed casting, ukukhishwa kwesihlabathi esicindezelayo,V inqubo yokusakazakanye no-V casting, ngenxa nje yengcindezi engalungile esetshenziselwa ukwenza isikhunta sokuphonsa. Kubaluleke kakhulu ukuphenya izinqubo zokusakaza zodonga oluncane olunembayo oluphakemefizingxenye zokuphonsa zensimbi eziyiphuthangoba izinqubo ziwusizo ekwehliseni ukusetshenziswa kwamandla, ukonga izinto ezingavuthiwe kanye nokunciphisa isisindo somshini. Ukufeza lezi zinhloso, kuye kwasungulwa izindlela eziningi zokulingisa. Inqubo yokubumba evalwe nge-vacuum, inqubo ye-V ngamafuphi, isetshenziswa kabanzi ukwenza insimbi nensimbi enodonga oluncane oluncane, ukunemba okuphezulu kanye nendawo ebushelelezi. Kodwa-ke, inqubo yokukhipha i-vacuum ayikwazi ukusetshenziselwa ukuthulula izinsimbi zensimbingokuqina kodonga oluncane kakhulu, ngoba ukugcwalisa kwensimbi okuwuketshezi endaweni yokubunjwa kuncike kuphela ekhanda elicindezelayo elimile kunqubo ye-V. Ngaphezu kwalokho, le nqubo ayikwazi ukukhiqiza ama-castings adinga ukunemba okuphezulu kakhulu ngenxa yamandla akhawulelwe okucindezela kwesikhunta.
Ukuze kuthuthukiswe ikhono lokugcwalisa lensimbi encibilikisiwe ye-liquid futhi sandise amandla acindezelayo esikhunta, sithuthukise indlela entsha yokukhipha ebizwa ngokuthi i-vacuum-sealed mold cast ngaphansi kwengcindezi. Nakuba le nqubo yokuphonsa isekelwe ku-V-inqubo, ihlukile ngoba kule nqubo insimbi ewuketshezi igcwalisa futhi iqine kusikhunta esivalwe nge-vacuum ngaphansi kwengcindezi ephezulu. Ngokusebenzisa indlela, ukukhishwa kwensimbi enezindonga ezincane, indawo ebushelelezi kanye nobukhulu obunembile kuye kwakhiqizwa ngempumelelo.
Isikhunta sisebenzise lokhu okushainqubo yokukhipha i-vacuumifana naleyo esetshenziselwa inqubo ye-V evamile. Ngemva kokuba isikhunta senziwe, sifakwa esitsheni. Ngokukhipha umoya ngepayipi elikhiphayo, izinga le-vacuum esikhunjini lingagcinwa ngenani elinqunyiwe. Insimbi ewuketshezi ithululelwa ku-ladle ngaphakathi kwesitsha. Khona-ke isitsha siyavalwa; futhi umfutho womoya emkhunjini ukhuphukela enanini eliqokiwe ngokupompa umoya ngesiteshi. Ngemva kwalokho, insimbi ewuketshezi ithululelwa emgodini wesikhunta ngokuguqula ingalo ye-rocker. Phakathi nenqubo yokugcwalisa nokuqiniswa, umoya ongaphakathi kwesikhunta ukhishwa ngokuqhubekayo ngamapayipi futhi isikhunta sigcinwa esimweni se-vacuum. Ngemva kwalokho, insimbi ewuketshezi igcwalisa futhi iqine ngaphansi kwengcindezi ephezulu.
Ngokuvamile, isikhunta singakhiwa futhi sigcinwe ukuthi singawi lapho umehluko wengcindezi ungaphezu kuka-50 kPa. Umsebenzi wesikrini sokukhipha umoya oxhuma imbobo yesibungu esidala ukukhuthaza insimbi ewuketshezi egeleza emgodini wokukhunta ngokudonsa igesi noma umoya ophuma emgodini wesikhunta ngesihlabathi esomile esisesikhunjeni. Uma kunesikrini esinjalo sokuphefumula, umehluko wengcindezi uyancipha ngesikhathi sokuthulula; kodwa isephezulu kuno-150 kPa, inkulu kakhulu kuno-50 kPa. Ngakho-ke, isikrini sokungenisa umoya asiwuchithi umsebenzi wefilimu yepulasitiki esikhunjeni se-cope.
Ngakho-ke inqubo ye-PV ingasetshenziswa ukukhiqiza ukukhishwa kwensimbi encane yodonga kanyecast steel castingsngokunemba okuphezulu. Ekukhiqizweni kokusakazwa okusebenzayo ezinye izindlela ezijwayelekile zisetshenziswa ukuthuthukisa ikhono lokugcwalisa lensimbi ewuketshezi, okuhlanganisa nokwenyusa inhloko yengcindezi emile yensimbi ewuketshezi, ukukhulisa izinga lokushisa lesikhunta kanye nokwandisa ingcindezi yokugcwalisa. Ukuncipha kwengcindezi emgodini omdala kuyindlela ephumelelayo yokwandisa ikhono lokugcwalisa.
Amandla okucindezela isikhunta kulolu hlobo olusha lwenqubo yokukhipha i-vacuum avela kumehluko wengcindezi phakathi kwangaphakathi nangaphandle kwesikhunta. Uma umkhulu umehluko wengcindezi, ukungqubuzana kukhudlwana phakathi kwezinhlamvu zesihlabathi, kanye nokuba nzima nakakhulu ukunyakaza kwezinhlamvu zesihlabathi ngokumelene nolunye, okuholela ekubeni namandla okucindezelwa kwesikhunta. Amandla acindezelayo aphezulu anenzuzo ekukhiqizeni ukusakaza ngokunemba kobukhulu obuphezulu kanye namaphutha amancane noma angekho nhlobo.
Nakuba izindlela ezifana nokwandisa okuqukethwe kwe-binder, ukubhaka isikhunta esiluhlaza kanye nokusebenzisa isihlabathi esiboshwe nge-resin kungathuthukisa amandla okucindezela isikhunta, futhi kuzokwandisa izindleko zokukhiqiza kakhulu. Ngaphansi kwamazinga okushisa aphezulu ifilimu yepulasitiki ebusweni besikhunta iyathambisa futhi iyancibilika, bese ifilimu iyahwamuka futhi isakazeke esihlabathini sesikhunta ngaphansi komphumela womehluko wengcindezi, futhi kule nqubo isikhunta silahlekelwa amandla ayo angangeni emoyeni kancane kancane. Inqubo enjalo ibizwa ngokuthi inqubo yokulahlekelwa evuthayo yefilimu yepulasitiki. Ziningi izici ezithinta isivinini sokushiswa-ukulahlekelwa kwefilimu yepulasitiki, njengohlobo nokushuba kwefilimu yepulasitiki, usayizi wokuphonsa, umehluko wengcindezi phakathi kwengaphakathi nangaphandle kwesikhunta, izinga lokushisa lensimbi encibilikisiwe yensimbi kanye nokuthi kukhona yini ukunamathela. ungqimba kwifilimu yepulasitiki. Kodwa-ke, lapho ungqimba lokumboza lufafazwa efilimini, isivinini sokushiswa sinciphisa kakhulu futhi isikhunta sinempahla efakazela umoya omuhle.
Isikhathi sokuthumela: Jan-24-2021