Shell moulding is a metal casting process using a thin, resin-bonded sand mould formed around a heated metal pattern, creating intricate parts with high precision, smooth finishes, and good dimensional accuracy, ideal for mass production of small to medium components.
The process involves creating a reusable pattern, coating it with a sand-resin mixture, curing it, joining the resulting shell halves, pouring molten metal, and breaking the shell away.
Advantages of shell moulding:
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Smoother cavity surface permits easier flow of molten metal and better surface finish on casting
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Good dimensional accuracy
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Machining often not required
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Mold collapsibility minimizes cracks in casting Can be mechanized for mass production