Investment Casting
	Investment casting is an industrial process based on and also called lost-wax casting, one of the oldest known metal-forming techniques. 
	
	
	
The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 300 kg and aluminium castings of up to 30 kg. It is generally more expensive per unit than die casting or sand casting but with lower equipment cost. 
 
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