An apparatus for curing to a predetermined time-temperature function

An automatically controlled water-curing apparatus has been designed and built at a cost for materials of $400. It can be programmed to follow predetermined time-temperature curves between 8 and 60°C to within ± 1°C, and tests with the tank unloaded have shown that, in a heating period, a temperature change from 8 to 60°C can be achieved in 7 hours. In a cooling period, the temperature can be reduced from 60 to 8°C in 55 hours.