Senzira chaiyo yekukanda, iyozvigadzirwa zvinogadzirwa neInvestment castingvane huremu hwepamusoro uye hukasha hwepasi hwakaderera. Investment casting is a near net shape casting. Kunyanya kana silica sol ichishandiswa seyakagadzirwa kugadzira molds, iko kurongeka kwepamusoro kwekudyara kwekudyara kunogona kuvimbiswa zvirinani. Naizvozvo, iyo silica sol investimendi yekukandira maitiro inogamuchirwa nezvakawanda uye zvakanyanyametal foundries.
Silica sol yakajairika mvura-based binder ine silicic acid colloid chimiro. Iyo polymer colloidal mhinduro umo yakapararira zvakanyanya silica particles inonyungudika mumvura. Iwo ma colloidal particles ane denderedzwa uye ane dhayamita ye6-100nm. Thenzira yekukanda marikugadzira goko ndiyo nzira yekugera. Pane zvinhu zvakawanda zvinopesvedzera gelation, kunyanya electrolyte, pH, sol concentration uye tembiricha. Kune akawanda marudzi ekutengesa silica sols, uye inonyanya kushandiswa ndeye alkaline silica sol ine silica yemukati ye30%. Kuti ukunde kusakwana kweiyo refu-yekugadzira goko reiyo silica sol shell, inokurumidza-kuomesa silica sol yakagadzirwa mumakore achangopfuura. Maitiro ekugadzira silica sol shell ari nyore. Nzira imwe neimwe ine maitiro matatu: kupfekedza, kuisa jecha, uye kuomesa. Maitiro ega ega anodzokororwa kakawanda kuti awane multilayer goko rehukobvu hunodiwa.
Iyo dimensional kushivirira nhanho yekudyara castings inogona kusvika CT4 ~ CT7. Pakati pavo, iwo dimensional kushivirira mamakisi ecast simbi investment castings, cast iron investment castings, nickel-based alloy investment castings uye cobalt-based alloy investment castings kazhinji CT5 ~ CT7. Iyo dimensional kushivirira mwero wesimbi yakareruka uyecopper alloy investment castingsinogona kusvika CT4 ~ CT6.
| INVESTMENT CASTING TOLERANCES | |||
| Inches | Mamirimita | ||
| Dimension | Kushivirira | Dimension | Kushivirira |
| Kusvika ku0.500 | ±.004" | Kusvika ku12.0 | ± 0.10mm |
| 0.500 kusvika 1.000" | ±.006" | 12.0 kusvika 25.0 | ± 0.15mm |
| 1.000 kusvika 1.500" | ±.008" | 25.0 kusvika 37.0 | ± 0.20mm |
| 1.500 kusvika 2.000" | ±.010" | 37.0 kusvika 50.0 | ± 0.25mm |
| 2.000 kusvika 2.500" | ±.012" | 50.0 kusvika 62.0 | ± 0.30mm |
| 2.500 kusvika 3.500" | ±.014" | 62.0 kusvika 87.0 | ± 0.35mm |
| 3.500 kusvika 5.000" | ±.017" | 87.0 kusvika 125.0 | ± 0.40mm |
| 5.000 kusvika 7.500" | ±.020" | 125.0 kusvika 190.0 | ± 0.50mm |
| 7.500 kusvika 10.000" | ±.022" | 190.0 kusvika 250.0 | ± 0.57mm |
| 10.000 kusvika 12.500" | ±.025" | 250.0 kusvika 312.0 | ± 0.60mm |
| 12.500 kusvika 15.000 | ±.028" | 312.0 kusvika 375.0 | ± 0.70mm |
Nguva yekutumira: Feb-03-2021