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2023-02-08
Precision casting is also called lost wax casting. Its products are precise, complex and close to the final shape of the parts. They can be used directly without processing or little processing, so investment casting is an advanced technology of near-net shape formation.
Ancient China: Wang Ziwu tripod, copper ban, copper lion, etc., are masterpieces of investment casting. Since investment casting was used in industrial production in the 1940s, it has been developing rapidly in half a century. In particular, European and American countries are developing rapidly. Investment casting is used in aviation, weapons sector, almost used in all industrial sectors, especially electronics, petroleum, chemical, energy, transportation, light industry, textile, pharmaceutical, medical instruments, pumps and valves and other sectors. In recent years, our country has been developing fast.
The development of investment casting technology enables investment casting to produce not only small castings, but also large castings. The profile size of the largest investment casting is nearly 2m, while the minimum wall thickness is less than 2mm. At the same time, investment castings are becoming more precise. In addition to linear tolerances, parts can also reach high geometric tolerances. The surface roughness of investment castings is also decreasing, up to Ra0.4μm.
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