| 摘要 |
PURPOSE:To obtain surely and easily a fine wire having a desired wire diameter by measuring the wire diameter of jet flow without contact in the stage of ejecting a molten material in the form of the jet flow from a fine hole and changing the temp. of the molten material according to the difference from the desired wire diameter. CONSTITUTION:A material to be melted is packed into a crucible 11 and is heated by a heater 12 to form the molten material. The molten material is ejected in the form of the molten jet flow by a pressurizing gas introduced by a pressurizing gas supply line 13 into the inside wall of a rotary drum 14. A cooling water layer 5 is formed by centrifugal force on the inside wall of the rotary drum 14 to cool and solidify the molten jet flow ejected thereto, by which the fine wire is obtd. A wire diameter measuring part 16 by laser light is provided between the tip of the nozzle and the cooling water layer 15. The quantity of high-frequency current is increased to increase the temp. of the molten metal if the measured wire diameter is larger than the intended value in the stage of the measurement. The rotating speed of the drum 14 is thereby increased to increase the flow rate of the cooling water flow, by which the diameter of the fine wire is controlled to the desired diameter. |
