Apparatus and method for gas curing foundry cores and molds

Metal founding – Process – With measuring – testing – inspecting – or condition determination

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164 16, 164154, 164159, B22C 912

Patent

active

051350432

ABSTRACT:
An improved apparatus for gas curing foundry cores includes an instrument system for attachment to a source of curing gas such as a gas generator. The system includes a signal generating section for providing a plurality of first signals. These signals represent the instantaneous mass flow rate of gas flowing to the core box. A counter/controller section is coupled to the signal generating section and totalizes the first signals. A valve device is coupled to the counter/controller section, opened to initiate the flow of gas to the core box and closed to terminate the flow of gas. The valve is opened upon receipt of a signal initiating the curing process and closed when the total of the first signals reaches a value representing a predetermined total mass of gas which has flowed to the core box. The improved method includes initiating flow of a gas to a core box containing raw cores to be cured. The gas includes a curing constituent, either in substantially pure form or mixed with a carrier gas. Upon commencement of gas flow, the mass of the gas is repetitively determined as a "running total". When the total mass of curing constituent into the core box has reached a predetermined value, flow is terminated.

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