| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for measuring the humidity in a cavity, having higher accuracy with a simple constitution, in a die casting process. SOLUTION: The method for measuring the humidity in the cavity, is performed as the followings, that is, in the die casting apparatus provided with the cavity constituted in a die and a vacuum generating means for exhausting gas in the cavity, at a prescribed measuring range (24) in a gas exhausting flowing passage (31) communicating the cavity with vacuum-generating means (27, 28), a moisture measuring means (21) for measuring the moisture in the gas passed through the measuring range, a temperature measuring means (22) for measuring the temperature of the gas and a pressure measuring means (23) for measuring the pressure of the gas, are attached; and in this measuring method, a measuring process for obtaining measured wave-form in each measured value at each casting cycle in the die casting apparatus and a calculating process for calculating the ratio of water molecules in the gas passed through the measuring range during the casting cycle, based on the measured wave-form, are performed. COPYRIGHT: (C)2007,JPO&INPIT
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