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Gravity castings
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Gravity castings

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Gravity castings are named as permanent mold castings typically used for high-volume production of small, simple metal parts with uniform wall thickness. Hua Xing usually cast aluminum alloys or copper alloys. the common gravity castings parts include gears housings, pipe fittings and wheels.

A product produced from a mold made from metal, the mold is pre-heated to around 300-500°F (150-260°C) to allow better metal flow. The steel cavities coated with ceramic before processing to allow easy removal of the work piece and promote longer tool life. Liquid metal is poured into the cavity of the permanent mold and allowed to solidify. Once the metal has solidified the part is extracted from the mold. The permanent mold is then closed and the cycle starts again.

Gravity die casting tolerances:

0 to 50 ± 0.20mm
50 to 100 ± 0.30mm
100 to 150 ± 0.40mm
150 to 200 ± 0.50mm
200 or above are depends on the product design