Silica sol casting process operation procedure

Silica sol casting process operation procedure
1. Check whether the equipment and temperature control instrument are in normal working condition.
2. Pour the old wax liquid recovered from the dewaxing kettle into the filter tank for filtration; then send it to the static tank for 6-8 hours below 90 °C.
3. After the standing water is drained, the wax liquid is poured into the water removal bucket.
4. In addition to the wax liquid in the water tank, keep warm at 110-120 ° C and stir to let the residual water evaporate until the surface of the wax liquid has no foam.
5. The wax liquid except the water is filtered through a <60 mesh screen and placed in a static barrel of <90 ° C, and allowed to stand for more than 12 hours.
6. Each water bucket and static bucket should periodically drain the residual water and dirt at the bottom.
7. The recovered wax liquid treated in the static barrel is sent to the vacuum barrel of the die waxing machine for the main production die (runner).
8, according to the performance of the old wax material and the consumption of wax, irregularly add a new amount of wax in the static bucket II, generally around 3% -5%.
9. Pour the qualified wax liquid into the wax tank in the incubator. In order to reduce the gas in the wax liquid in the wax bath, first maintain a high temperature period of 80 ° C / 2 h and then drop to 54 ° C. After being incubated at 54 ± 2 ° C for 24 h, it can be used to suppress wax patterns.