precision investment castingsprecision investment castings is utilized when complex detail,undercuts or non-machinable features and accurate parts are required.
precision investment castings typically requires significant lead time,are best suited for low volume production rates.
precision investment castings can meet the tight casting tolerance and good smooth surface.
precision investment castings is including four different process:
sodium silicate shell process
complex shell process
soluble glass process
lost wax process
Sodium silicate shell process is the best one which suitable the smaller parts,the tolerance can achieve at CT4~CT5 Grade
Surface qualityN 1 N 2 N 3 N 4 N 5 N 6 N 7 N 8 N 9 N 10 N 11 N 12 Microns 0.025 0.05 0.1 0.2 0.4 0.8 1.6 3.2 6.3 12.5 25 50 Micro-Inch 1 2 4 8 16 32 63 125 250 500 1000 2000 
