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CO2 used in CO2 molding is at high pressure.

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+1 vote
in Foundry and Forging by (110k points)
CO2 used in CO2 molding is at high pressure.

(a) True

(b) False

The question was posed to me in my homework.

The doubt is from Carbon Dioxide Mould topic in chapter Moulding Machines & Special Moulding Processes of Foundry and Forging

1 Answer

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The correct choice is (b) False

Easiest explanation: Carbon-dioxide gas is used at a low pressure usually about 1.5 kg/cm^2 is diffused through a mixture (of sand and sodium silicate) to initiate the hardening reaction which takes from a few seconds to a few minutes depending upon the size of the core or mold.

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