Sand casting: Sand casting leyi talaka ku tirhisiwa eka indasitiri ya ti valve yinga tlhela yi avanyisiwa hi tinxaka tohambana hambana ta sandi tofana nasandi leri tsakamaka, sandi ro oma, sandi ra nghilazi ya mati na sandi ra furan resin no-bakehi ku ya hi swihlanganisi swo hambana-hambana.
(1) Sava ra rihlaza i ndlela yo vumba laha ku tirhisiwaka bentonite tanihi xihlanganisi entirhweni. Swihlawulekisi swa yona hi leswi: xivumbeko xa sandi lexi hetiweke axi lavi ku omisiwa kutani xi endliwa vutshunguri byo hlawuleka byo nonoka, xivumbeko xa sandi xina matimba yokarhi yo tsakama, naswona sandi core na shell swina ti concessions to antswa, leswi olovaka eka ku hoxa ku basisiwa na sandi leri waka. Kuhumelela ka vuhumelerisi bya molding swile henhla, xirhendzevutani xa vuhumelerisi xikomile, naswona ntsengo wa switirhisiwa na wona wule hansi, leswinga olova eka ku hlela vuhumelerisi bya assembly line. Swiphiqo swa yona hileswaku: ti castings titala kuva na swihoxo swofana na ti pores, sand inclusions, na sandi ro namarhela, naswona khwalithi ya ti castings, ngopfu ngopfu khwalithi yale ndzeni, yile kule swinene naku ringanela.
(2) Sava leri omeke i endlelo ro endla xikombiso hi ku tirhisa vumba tanihi xihlanganisi, naswona bentonite yitsongo yi nga antswisa matimba ya yona yo tsakama. Swihlawulekisi swa yona hi leswi: xivumbeko xa sandi xilava ku omisiwa, xina ku nghena kahle ka moya xikan’we naku hangalaka ka moya, aswi olovi ku humesa swihoxo swofana naku hlantswiwa ka sandi, ku namarhela ka sandi, na ti pores, naswona khwalithi yale ndzeni ya casting nayona yikahle swinene. Swiphiqo swa yona hileswaku: switirhisiwa swo omisa sandi swa laveka, naswona xirhendzevutani xa vuhumelerisi xi lehe swinene.
(3) Sava ra sodium silicate i ndlela yo vumba hi ku tirhisa nghilazi ya mati tanihi xihlanganisi. Swihlawulekisi swa yona hi leswi: nghilazi ya mati yina ntirho wo kota ku tiya hi yoxe endzhaku ko hlangana na CO2, naswona yingava na swipfuno swohambana hambana na swipfuno swa gas hardening modeling na core making. Hambiswiritano, kuna swiphiqo swofana na kunga tshoveki kahle ka shell, ku tika eka ku basisiwa ka sandi kuva ku endliwa ti castings, xikan’we na nhlayo yale hansi ya recycling ya sandi leri tirhisiweke.
(4) Furan resin no-bake sand molding i ndlela ya casting process leyingana furan resin tani hi xihlanganisi. Eka mahiselo ya kamara, sandi ra molding ri horisiwile hikokwalaho ka ti khemikhali ta binder ehansi ka ntirho wa curing agent. Swihlawulekisi swa yona hi leswi: xivumbeko xa sandi a xi lavi ku omisiwa, leswi hungutaka swinene xirhendzevutani xa vuhumelerisi naswona swi hlayisa eneji. Resin molding sand yi olova swinene ku yi hlanganisa naswona yina ku tshoveka kahle, naswona molding sand ya ti castings yinga tlhela yi basisiwa hiku olova, dimensional accuracy ya ti castings yile henhla, naswona surface finish yikahle, leswinga antswisaka swinene khwalithi ya castings. Swiphiqo swa yona hileswaku: swilaveko swa khwalithi ya raw sand na swona swile henhla, ndzhawu ya vuhumelerisi yina nun’hwelo lowu hlundzukisaka nyana, naswona ntsengo wa resin na wona wule henhla. Endlelo ro hlanganisa furan resin self-hardening sand: Resin self-hardening sand yitsakeriwa kuva yi endliwa hi continuous sand mixer, ku cheriwa raw sand, resin, curing agent, na swin’wana hiku landzelelana, naswona swihlanganisa hiku hatlisa. Hlanganisa u tlhela u tirhisa nkarhi wihi na wihi. Ku landzelelana ka switirhisiwa swohambana hambana swa raw loko ku hlanganisiwa sandi ra resin swile hi ndlela leyi landzelaka: original sand + curing agent (p-toluenesulfonic acid aqueous solution) – (120-180S) – resin + silane – (60-90S) – sandi (5) Muxaka wa sandi lowu tolovelekeke Endlelo ra vuhumelerisi bya Casting: precision casting.
Nkarhi wa poso: Aug-17-2022
