The casting method of silica sol casting has the advantages of high dimensional accuracy and good surface quality. It is a widely used advanced technology that hardly requires cutting. The use of silica sol casting method can save a lot of machine equipment and processing time, as well as save metal raw materials. Silica sol casting is a widely used precision casting method in the field of precision casting. This precision casting method effectively reduces costs and enhances the competitiveness of precision casting enterprises. Casting is one of the most important steps in silica sol casting, so what are the commonly used casting methods for silica sol casting?

1. Crystallize under pressure and place the mold shell into a pressure vessel for pouring. After completion, immediately close the pressure tank and send high-pressure air or inert gas into the pressure tank to solidify the casting under pressure, in order to increase the density of the casting.

2. Vacuum suction casting, placing the shell into a vacuum casting box, and sucking out the gas inside the cavity through the fine holes on the shell, allowing liquid metal to better fill the cavity, replicating the shape of the cavity, improving casting accuracy, and preventing defects such as insufficient porosity and insufficient pouring. This method is quite common abroad.

3. Directional crystallization. For some investment castings, such as turbine blades, electromagnetic steels, etc., if their crystal structure is columnar crystals arranged in a certain direction, their working performance can be greatly improved. Therefore, the development of investment oriented crystallization technology is rapid. Get development.

4. Thermogravimetric casting, which is the most widely used casting form, is to remove the shell from the baking machine and then perform high-temperature casting.