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Conventional
gravity casting poses several shortcomings in producing the
lever arms.
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In gravity casting, solidified
metal in the down sprue dramatically increases alloy usage and cost,
compared to CLA.
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Variability (from one
pour to the next) of metal flow into the mold cavities makes reliable
casting fill-out difficult.
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Metal flow is much more
turbulent, increasing the chance for trapped gas and oxide inclusions.
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Conventional gravity casting with sprue and down spout that need
to be removed
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