CHLORATE-CANDLE FABRICATION BY HOT PRESSING
NAVAL RESEARCH LAB WASHINGTON DC
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An investigation showed distinct advantages to manufacturing chlorate candles by a hot-pressing technique, omitting water as a binder. Small quantities of water trapped in a chlorate candle can result in the production of significant quantities of chlorine. By the hot-pressing method, high-density candles 2.5 gcc were produced which yield the equivalent of 200 cu ft of oxygen STP from 490 cu in. of candle volume. Two methods can be used for forming candles molding and extrusion. Molded candles are best formed at temperatures from 225 to 245 C at pressures from 10,000 to 5000 psi, respectively. A double-action ram can be used with a single-action ram, successive pressing increments should be used to avoid uneven distribution of density. Use of a glass-wool blanket or oven annealing is recommended to avoid thermal stresses on cooling.