Silica sol precision casting uses precision casting methods to obtain castings. Commonly used is investment casting, also known as lost wax casting. The parts cast by this silica sol precision casting method do not need to be processed or require a small amount of processing to be used.
Profiling design and manufacturing: design and process profiling according to the requirements of the part drawing. The profiling material is made of steel or other materials. 2. Investment mold manufacturing, press-inject the paste-like mold material into the pressure mold to make an investment mold. 3. Module assembly: Weld a number of logic ends onto a wax stick (that is, a pouring system) made of wax material to make a module. 4. Shell manufacturing: The surface of the watch module is coated with a refractory coating cup, sprinkled with a layer of refractory material (usually quartz sand or bauxite, etc.), and then put in a hardener to harden the coating. Repeat this several times to form a hard shell of 8-10 mm on the surface of the module. 5. Melt loss mold (. dewaxing): Put the finished shell module into a hot water pool or other hot containers, and melt all the mold materials to form a hollow shell. 6. Shell roasting: Put the mold shell in the heating furnace for roasting. 7. Burning: Pour molten metal into the mold shell. 8. Shelling and cleaning of silica sol precision casting manufacturing process.
Silica sol precision casting is mainly used as a binder for precision casting coatings and can be used as surface coating and reinforcement coating for mold shells. The use of small particle silica sol in precision casting instead of ethyl silicate can not only reduce costs but also improve working conditions. When used in precision casting of thin shells, it can make the shells have high strength, high dimensional accuracy, good casting finish, better shape than a water glass, and cheaper than ethyl silicate. It is especially suitable for large castings, castings that require a high surface finish, and castings that require no or little margin.