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Over-curing or under-curing of the shell mould, leads to the generation of sophisticated problems in the shell mould.

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Over-curing or under-curing of the shell mould, leads to the generation of sophisticated problems in the shell mould.

(a) True

(b) False

The question was posed to me during an interview.

Question is from Shell Moulding topic in section Special Casting Techniques of Casting-Forming-Welding I

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The correct answer is (a) True

Explanation: For the curing of the shell mould, it is kept in an electric or gas fired oven. The curing of the shell should be done as per requirements only because over-curing can cause the mould to break down as the resin would burn out. And under-curing may result in blow holes in the casting or the shell may break during handling.

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