Method for making foundry moulds and cores utilizing a gas catalyst
AssigneeThe White Sea & Baltic Company Limited
InventorsDavid Epstein, Leslie A. Watkins, John W. J. Bugg
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Abstract
Foundry moulds or cores are made by putting a mixture of foundry sand and acid-hardenable binder into a mould or core box, hardening the binder by passing an acidic gas through the mixture, removing the mould or core from the box and applying to its surface a material which will neutralise or adsorb acidic gases. The neutralising or adsorbent material permits avoidance of the health hazard of emission of acidic gas from the mould or core on storage or during use.
Claims6
A method for making foundry moulds or cores comprising putting a mixture of foundry sand and a binder hardenable by use of an acidic catalyst into a mould or core box, passing an acidic gas through the mixture thereby causing the binder to harden, removing the mould or core from the box and applying to the surface of the mould or core a composition comprising a material which will neutralise acidic gases or which will adsorb such gases, said composition being applied in an amount effective to neutralise or adsorb at least a substantial proportion of the acidic gases released from the mould or core before and during casting.
Dependencies are inferred from the claim text.