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- W2324888514 abstract "This report deals with the further experiment on shrinkage coefficent of the casting in the dies without core.In the previous experiment the calculated shrinkage coefficent differed from measured value. From the present experiment, however, we know that shrinkage coefficent varied according to the thickness of casting.So that we must correct the conventional formula and set up a new shrinkage formula as follows:ΔL=K-αf(tf-20)-a/tΔL: Shrinkage coefficent of casting.K: Constant value according to the kind of material.αf, tf: Expansion coefficent and temperature of die.a: 2×(Surface roughness of die cavity surface).t: Thickness of casting.20: Room temperature (°C).For the sperical case as boess or rib.ΔL=αe(Tc-Ts)+S+α(T-20)-αf(tf-20)-a/tor ΔL=A+K+αf(tf-20)or ΔL=Kαe: Expansion coefficent of material in liquid state.Tc: Temperature of casting when casting is over.Ts: Temperature of casting when it bigins to solidify.S: Solidification shrinkage of material.T: Temperature of casting when solidification is over.A: Constant value which is measured beforehand by experiment.α: Expansion coefficent of casting material in solid state." @default.
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- W2324888514 date "1957-01-01" @default.
- W2324888514 modified "2023-09-27" @default.
- W2324888514 title "On the shrinkage coefficient of die castings and gravity" @default.
- W2324888514 doi "https://doi.org/10.2464/jilm.7.49" @default.
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