Tlhaloso
Investment casting, eo hape e tsejoang e le "lahleha ea boka ba linotsi" kapa "precision casting", ke mokhoa o nepahetseng oa ho lahla o nang le seha o se nang letho. Lisebelisoa tsa ho bopa matsete (hangata lisebelisuoa tse tlase tse qhibilihang joalo ka boka) li sebelisoa ho etsa lisampole tsa ho bopa matsete le ho etsa mojule. Ebe pente (refractory material) e sebelisoa ka holim'a mojulu. Ka mor'a ho omisa le ho tiisa, mojule oa futhumala ho qhibiliha thepa ea ho bopa. Ho thehoa khetla e sekoti, 'me mokelikeli oa tšepe o tšeloa ho oona ka mor'a ho chesa mocheso o phahameng,' me ho lahla ho fumanoa ka mor'a ho hloekisa.
Litšobotsi tsa ho kenya chelete
1.Castings na le phahameng dimensional ho nepahala (CT4-CT7); tlaase holim'a roughness (Ra1.6-6.3um). Kabelo ea ho itšeha ea li-castings e fokotsehile, 'me ho etsoa ha sebopeho se haufi le marang-rang ho ka finyelloa.
2.E khona ho hlahisa li-castings tse tšesaane tse nang le libopeho tse rarahaneng. Joalo ka moamoheli oa pele (o entsoe ka mehele ea ka hare le ea kantle le li-blades tse 14). Ka mohlala, li-blade tsa enjene li na le botenya bo fokolang ba 0.7mm.
Lisebelisoa tsa 3.Alloy ha lia thibeloa. Tšepe, koporo, aluminium, titanium, magnesium, joalo-joalo. Li-alloys tsa mocheso o phahameng oa Nickel tse nang le lintlha tse phahameng tsa ho qhibiliha, litšepe tse tlaase tse kang zinki le thini.
4.Ho kenya chelete ho na le meeli e itseng. Ts'ebetso e boima, potoloho ea tlhahiso e telele, 'me boholo ba li-castings ha boa lokela ho ba kholo haholo.
Phallo ea ts'ebetso
1.Ho qapa le ho etsa ho bopa.
Mofuta o sebelisoang ho etsa mohlala oa boka o bitsoa stamper. Hoa hlokahala ho ba le ho nepahala ho phahameng le ho qeta holimo. E entsoe ka aluminium alloy, tšepe, fusible alloy, plaster kapa thepa ea polasetiki ho latela sehlopha sa tlhahiso.
2.Etsa mekhoa ea boka.
Thepa ea hlobo ea boka hangata e entsoe ka 50% parafine le 50% ea asiti ea stearic. Ka mor'a ho qhibiliha, sebelisa mochine oa ho hatisa boka ho hatella lintho tse entsoeng ka boka ka har'a hlobo. Kamora ho tiisa, e ntše 'me u e kenye metsing a batang ho pholile ho thibela ho senyeha. Hangata hlobo ea sprue e entsoe ka molamu oa lehong kapa molamu oa aluminium o kenngoeng ka har'a khetla ea boka ba 2-3mm, ebe mekhoa ea boka e tšeloa ho hlobo ea sprue ka thipa e futhumatsang ea motlakase ho etsa mojule.
3.Ho etsa likhetla.
Koahela mojule ka sekoahelo se entsoeng ka phofo ea quartz le khalase ea metsi (kapa silika sol), e ntše, e fafatse ka lehlabathe la quartz, ebe u e kenya ka har'a sesebelisoa se thata (se sebelisoang hangata ammonium chloride kapa aluminium chloride) ho e thatafatsa ka Lera la likhetla le ho pheta ts'ebetso e ka holimo ho fihlela botenya ba khetla ea 5-10 mm bo thehoa.
4.Ho phunya boka le ho halika.
Beha khetla e entsoeng ka tankeng ea metsi a chesang ho 95-100 ℃ ho qhibilihisa hlobo ea boka le ho e phaphamala ka ntle. Ebe o chesa khetla ea hlobo ho 800-900 ℃ (khetla ea khalase ea metsi) ho eketsa matla le ho tlosa khetla ea hlobo. Mongobo, boka ba masala, saponification, joalo-joalo.
5.Ho tšela le ho hloekisa.
Hangata khetla ea hlobo e chesitsoeng e tšeloa ha e ntse e chesa ka mor'a hore e lokolloe sebōping e le hore e hlahise li-castings tse tšesaane. Ka mor'a hore ho lahla ho pholile, senya khetla ea hlobo, tlosa ho lahla le ho khaola tsamaiso ea ho tšela le ea riser, ebe o phethahatsa ts'ebetso ea ho lahla ka mor'a ts'ebetso, ke hore, sebelisa sandblasting, ho thunngoa ho phatloha, ho belisoa ha alkali le mekhoa ea ho hloekisa electrochemical ho tlosa khetla e setseng le sekhomaretsi holim'a metsi le ka hare ho cavity ea ho lahla. Lehlabathe, chloride, joalo-joalo lia tlosoa ho fumana li-castings tse nang le libaka tse boreleli.
