Which type of pattern is specifically designed to produce hollow castings by incorporating cores?
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A.
Segmental pattern
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B.
Shell pattern
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C.
Loose piece pattern
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D.
Cope and drag pattern
Correct Answer:
B. Shell pattern
Explanation:
A shell pattern is specifically designed to create thin-walled, hollow castings. Unlike other patterns that might require a separate core box to form internal cavities, the shell pattern utilizes its own geometry: the exterior surface shapes the mold cavity, while the interior surface serves as the pattern for the core itself. This integrated design allows the pattern to define both the outer and inner dimensions of the cast part simultaneously, making it highly effective for producing hollow structures with consistent wall thickness.
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