Precision casting refers to the casting process of obtaining precise dimensions. Compared with traditional sand casting technology, precision casting produces castings with more precise dimensions and smoother surfaces.

Precision casting, also known as wax free casting, is an advanced near net forming technology. Its products are exquisite and complex, close to the final shape of the parts, and can be used directly without the need for processing or only slight processing. How is its history?

In ancient times, bronze cauldrons, bronze plates, and bronze lions were all masterpieces of casting. Investment casting has undergone rapid development for half a century since its application in industrial production in the 1940s. Especially in European and American countries, there is rapid development. Investment casting is applied to almost all industrial sectors, especially electronics, petroleum, chemical, energy, transportation, light industry, textiles, pharmaceuticals, medical equipment, pumps, and valves, except for aviation and weapons sectors. In recent years, the Chinese economy has developed rapidly.

With the development of investment casting technology, investment casting can not only produce small castings, but also large castings. The appearance size is close to 2 meters high, but the wall thickness does not exceed 2 meters. At the same time, the precision of investment in die castings is becoming higher and higher, and in addition to linear tolerances, higher geometric tolerances can also be achieved. The surface roughness of investment castings is also decreasing, reaching Ra0.4 m.

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