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Shell Mould Casting
Shell Mould Casting
Casting India, pioneer manufacturer of castings, has widened its range with introductions of Shell Mould Casting. The metal pattern is first heated at a temperature of 200ºC / 392ºF and then covered with a mixture of sand and thermo set plastic. It forms a skin of sand/plastic mixture of about 3.5 mm (0.125 inch), which adheres to the pattern. The shell mould is formed after the skin gets removed from the pattern. The two halved of the shell mould are secured together and the metals id poured in the shell to form the part. Once the metals solidified, the shell is broken.
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The materials that can be used with this process are aluminium, cast irons, and copper alloys. Parts made can be connecting rods, gear housings, lever arms etc.
- Good Surface Finish: 1.25µm to3.75µm (50µin to 150µin) rms dimensional tolerance of 0.5 %
- Size Limits: 30 g to 12 kg (1 oz to 25lb)
- Minimum Thickness: As low as 1.5mm (0.062 in) to 6.25mm (0.25 in) depending on the material
- Superi or Machining Qualities: As it has soft skins and hard or dense interiors
- Draft Allowance: Typically 10 C
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