Method of producing sand mounds having a frozen surface
AssigneeW. H. Booth & Co. Limited
InventorFrederick H. Hoult
Life of this patent
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Abstract
A method of producing a mould of particulate material comprises admixing the particulate material with a controlled quantity of water, compacting the mixture to the required shape on a pattern or the like, removing the compacted mass from the pattern, and directing at at least the surface of the compacted mould to be contacted by molten metal a stream of coolant, whereby at least that surface is frozen to a depth sufficient to withstand the conditions imposed during the pouring of molten metal into the mould.
Claims21
A method or producing a mould of particulate material comprising admixing the particulate material with a controlled quantity of water, compacting the mixture to the required shape on a pattern or the like, removing the compacted mass from the pattern, and then directing at at least the surface of the removed, compacted mould to be contacted by molten metal a stream of coolant, whereby at least that surface is frozen to a depth sufficient to withstand the conditions imposed during the pouring of molten metal into the mould.
A method of producing a mould of particulate material comprising admixing the particulate material with a further material capable of providing a preliminary bond, compacting the mixture to the required shape on a pattern or the like, removing the compacted mass from the pattern then providing the compacted mass with a primary bond by directing at at least the surface of the removed compacted mould to be contacted by molten metal a stream of coolant, whereby at least that surface is frozen to create the primary bond.
Dependencies are inferred from the claim text.