At present, several precision casting methods commonly used in factories can meet the actual production needs, but the performance indicators of mold materials have a direct relationship with the quality of precision castings, which directly affects the dimensional accuracy and quality of precision castings. Therefore, for the size and quality control of silica sol precision casting mold castings, it is necessary to put forward higher requirements, and the performance requirements that the mold needs to meet are as follows:

It is necessary to have a small line shrinkage rate and the smallest expansion coefficient at the softening temperature to achieve the dimensional accuracy of the mold material. The heat capacity is small, the melting point is moderate, and it is convenient to make the mold shell through the wax material and remove the wax material from the mold shell. The mold should have sufficient hardness and strength at room temperature, and also have high thermal stability at slightly higher than room temperature. In order to avoid various fractures, damage or surface scratches in actual production and life.