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Q. Describe shell moulding process merits and demerits.
Ans. Shell moulding process
Merits
(i) Better dimensional accuracy and consistency when compared with green sand moulding.
(ii) Less resistance to the flow of liquid metal in the mould.
(iii) Thin sections, short corners, small projections can be accommodated.
(iv) Subsequent machining operations are reduced.
Demerits
(i) More expensive metal pattern than the corresponding pattern for green sand moulding.
(ii) Not justified for small quantities.
the amount of cold working metal can withstand is directly related to which properties? name two and also discuss the effect that cold working has upon these properties?
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