Apparatus for controlling the moisture content of foundry sand
Patent 4304289 Issued on December 8, 1981. Estimated Expiration Date: 
June 27, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 27, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3172175 3693079 Sand cooler control system Method and apparatus for cooling recycled foundry sand Patent #: 4141404 InventorAssigneeApplicationNo. 06/052572 filed on 06/27/1979US Classes:164/155.6, Responsive to thermal condition164/154.4, Continuous casting164/5Including recycling of process materialExaminersPrimary: Baldwin, Robert D.Attorney, Agent or FirmInternational ClassesG05D 22/02 (20060101)G05D 22/00 (20060101) B22C 5/08 (20060101) B22C 5/00 (20060101) AbstractA sand moisture control system for a sand casting foundry system incorporates non contact sensing techniques for controlling the moisture content of foundry sand by the addition of water at the muller or mixing operation of a sand casting system. The temperature of the foundry return sand is measured by an infrared detector while moisture content is measured by a microwave detector along the conveyor feed input to the muller or at the return sand holding tank. Electrical outputs from each detector corresponding to temperature and moisture are integrated to provide a signal corresponding to the % of moisture deviation from a predetermined value and this signal is utilized to control the amount of water added to the Muller.Field of SearchIncluding recycling of process material | |
