FoundryMag.com
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Foundry Management & Technology - News and Trends
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Excerpted from the website:
- A procedure has been developed to measure accurately the volume and rate of gas evolution from cores in contact with molten metal. The core-metal contact area and metal temperature largely control the rate of gas evolution, but the core age and core modulus have significant effects: Older cores produce lower gas volumes. Higher metal temperatures increase the rate and volume of gas produced. Higher-modulus cores produce more gas, but lower-modulus cores produce more gas-evolution peaks in the rate of evolution. Core permeability has no effect on the gas volume or rate of gas formation, but it affects the ability of the gas to pass along the core and exit from the core print.
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