Development of precision casting castings


Precision casting includes investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting. Among them, investment casting, also known as lost wax casting, is more commonly used: select suitable investment materials (such as paraffin) to make investment; repeat the process of dipping refractory paint and spreading refractory sand on the investment, hardening the shell and drying; Melt the internal investment mold to obtain the cavity; bake the shell to obtain sufficient strength and burn off the remaining investment material; pour the required metal material; solidify and cool, and remove the sand after shelling, so as to obtain high Precision finished product. Heat or cold work and surface treatment as required by the product.


Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the part, and can be used directly without processing or with little processing. Therefore, investment casting is an advanced process with near-net shape.

Ancient China: Prince Wuding, Bronze Ban, Bronze Lion, etc. are all masterpieces of investment casting. Since investment casting was used in industrial production in the 1940s, it has been developing at a rapid rate for half a century. In particular, European and American countries are developing rapidly. Investment casting is used in almost all industrial sectors, especially in electronics, petroleum, chemical, energy, transportation, light industry, textiles, pharmaceuticals, medical equipment, pumps and valves. In recent years, precision casting has also developed rapidly.