研究論文
超音波音速による生型砂の水分測定
1986 年 58 巻 5 号 p. 356-361
詳細
1986 年 58 巻 5 号 p. 356-361
Moisture control of molding sand is very important for the quality of castings. Therefore, method of measuring moisture content of molding sand using ultrasonic velosity was examined. Moisture content was adjusted to 3 to 12 percent. Measurement was made on cylindrically shaped remolded sand specimens. Velocity was calculated from the length of the specimen and the time of traveling of ultrasonic wave through it. Effects of remolding pressure, temperature and quantity of bentonite in sand on ultrasonic velocity were studied. Ultrasonic velocity decreased linearly with increasing moisture content in the moisture range studied. It was concluded that application of the method to practice is feasible.
