| 摘要 |
PURPOSE:To control the thickness of a thin strip, by detecting the temp. in the prescribed position where molten metal enters a cooling stage and controlling the temp. in the prescribed position to a desired temp. CONSTITUTION:The molten metal 2 in a tundish 1 is charged from a nozzle 3 onto the surface of a cooling roll 11 and a thin amorphous alloy strip 12 is formed. A thermocouple 4 is embedded in the prescribed position of the roll 11 and is connected electrically to an FM transmitter 5 mounted to the roll 11. The signal transmitted from the transmitter 5 is received in an FM receiver 6, and the signal thereof is fed to an arithmetic controlling unit 7, by which the difference between a desired temp. and the detected temp. is compared and calculated. The result thereof is fed to a motor 8. The driving of the motor 8 is controlled according to the result of the calculation to rotate a transmission gear 9, by which the vertical movement of a tundish 1 is controlled via a transmission mechanism 10 installed to the tundish 1, so that the nozzle gap is set in the prescribed position. |
