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Ten Steps to Improving Casting Yield in Ductile Iron Foundries
Norberto T. Rizzo Downes
Dana de Venezuela S.H. Foundry Division
Valencia, Venezuela
Ramon D. Duque, Sudesh Kannan; SELEE Corporation.
Hendersonville, NC, USA
ABSTRACT
Ten principles or rules for increasing yield in ductile iron castings are proposed. These
include use of ceramic foam, shorter gating systems, non-turbulent gating system design,
thinner runners and ingates, and proper and efficient use of risers. Many of these techniques
have been reported in the literature. It is suggested that cost-savings achieved by application
of these principles can be significantly higher than those achieved by conventional scrap
reduction procedures. Two case studies outlining the use of these principles with yield
improvements are shown.
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