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Sharp corners in casting design may cause defects in the casting but it helps in strengthening of pattern material.

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in Casting-Forming-Welding I by (687k points)
Sharp corners in casting design may cause defects in the casting but it helps in strengthening of pattern material.

(a) True

(b) False

The question was posed to me in semester exam.

Question is taken from Pattern Fillets topic in division Pattern and Pattern Making of Casting-Forming-Welding I

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Best answer
Right option is (b) False

Explanation: Sharp corners in casting design produce various defects in the castings and instead of strengthening, it makes the breaking of pattern material. Proper filleting reduces hot spots in the casting and eliminates defect from the casting. Fillets aid in the removal of the pattern from the mould and also strengthen the pattern.

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