Lost Wax Casting

الوصف

For investment casting in art, see lost-wax casting. Investment casting, also called lost-wax casting, is one of the oldest known metal-forming techniques.[citation needed] From 5, **0 years ago, when beeswax formed the pattern, to today’s high-technology waxes, refractory materials and specialist alloys, the castings allow the production of components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys. Lost foam casting is a modern form of investment casting that eliminates certain steps in the process. Inlet-outlet cover of a valve for a nuclear power station produced using investment casting. the process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to **0 kg and aluminum castings of up to *0 kg. It is generally more expensive per unit than die casting or sand casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.