No controlled, systematic measurements of metal flow rates through woven refractory cloth filters have been conducted since the introduction of this technology in the United States. This type of data is necessary, since mold-fillingcharacteristics are affected by the type and location of the filter, as well as by the alloy being poured. This report presents basic flow rate data through woven cloth filters for a number of molten metal alloys, using various mesh sizes and filterconfigurations.Flow rates through the cloth were found to be similar to flow rates through extruded cellular ceramic, pressed cellular ceramic and reticulated foam ceramic filters of similar cell size and with equivalent cross-sectional area. The best results wereobtained when the refractory woven cloth filter developed a hydraulic lock, early in the pouring process. Resin-coated cloth filters were observed to be instantly wetted, or primed, due to the apparent increase in wettability that the resin coatingprovides.
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