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Investment Casting (Silica Sol Casting) Description:

Investment casting process has 2 types which one we used medium temperature wax (green wax, harder, not easy to warp) and another we used low temperature wax (white wax, soft) , with very good smooth surface and tight tolerance. Its difference is only the wax and wax injection, the following process is exactly the same.

Investment casting use a kind of solution called "Silica Solution" and a kind of sand called "Zirconium Sand". In general, it has the sand layer 7 or 9 (layers). The mold shell is drying in constant temperature using air conditioner keeping the temperature.

The working environment of investment casting is much better than other casting processes, with strict material, temperature, processes controlling, and offers the best quality castings in surface finishing, tolerance and in purity of alloy grade, it is the most expensive of all casting processes too.

They are suitable for small parts which are widely used in stainless steel, carbon steel, alloy steel, brass and other alloys. But, the Silica Sol Casting with low temperature wax is greater suitable for large parts in stainless steel and alloy steel. At present, we often use the stainless steel grade of ASTM 304, ASTM 304L, ASTM 316 and ASTM 316L.



Technology Specification:

Casting Process: Investment casting (Silica Sol Casting) with medium temperature green wax and low temperature white wax.

Material Range: Carbon steel, Low alloy steel, Stainless steel. See the attached “General Material Specification Table”

Material Standard: GB, ASTM, AISI, DIN, BS, JIS, NF, AS, AAR

Casting Weight Range: 5g~30Kg

Casting Dimension Tolerance: ISO8062 CT5 See the attached “Casting Dimension Tolerances”

Casting Surface Roughness: Ra 3.2um~6.3um See the attached “Surface Roughness Comparison Chart”


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