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22 casting - ME250 Design and Manufacturing I Metal casting...

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Metal casting processes ME250 Design and Manufacturing I
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2 Introduction Sand casting Die casting Product design considerations Summary Outline
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3 Introduction Metal casting processes Molten metal poured into a mold to form a net shape Mold can be temporary (sand casting) or permanent (die casting) Sand casting Most widely used casting process Can work with nearly any metals; esp. the ones with high melting temp. (steel, nickel, titanium). Sand (silica: SiO 2 ) mold is broken up at part solidification. Die casting “ancestor” of injection molding Die = (permanent) mold
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4 Sand casting Sand casting Most widely used casting process Sand (silica: SiO 2 ) mold is broken up at part solidification low production rate Can work with nearly any metals; esp. the ones with high melting temp. (steel, nickel, titanium). Low tolerance/surface finish: need subsequent machining
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5 Sand casting Sand cast products Cast iron Cast iron
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6 Sand cast products Sand casting Aluminum Cast iron
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7 Sand casting Steps
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8 Sand casting Mold
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9 Sand Sand casting
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