investment casting waxinvestment casting wax
Success in producing high quality castings in the metal of choice depends on the production of high quality patterns and runner assemblies. As the most widely used pattern material, due to it's ability to be shaped in either liquid, semi-plastic, or plastic states, wax is the key component. If the wax pattern is wrong, the casting will be wrong - it follows that the correct choice of wax type and product is critical
Investment casting is utilized when complex detail,undercuts or non-machinable features and accurate parts are required.
Investment casting typically requires significant lead time,are best suited for low volume production rates.
Investment casting can meet the tight casting tolerance and good smooth surface.
Investment casting is including four different process:
lost wax process
sodium silicate shell process
complex shell process
soluble glass 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 