METHOD AND DEVICE FOR MANUFACTURING METALLIC FIBER, CROSS SECTION OF WHICH TAKE CIRCULAR SHAPE

摘要

PURPOSE: To facilitate the production of a gold layer fiber having a uniformly circular cross section by forming a laminar flow within a static flow passage by the cooling liquid in a short cooling block under a nozzle and adding a resistance lowering agent to the cooling liquid. CONSTITUTION: After a shut-off valve 15 is opened, liquid 1 is admitted through the nozzle into a cooling passage 9 at a velocity of 3 to 18 m/s and is made to cross the space of a width 0.5 to 10 mm filled with gas and steam. The outflow velocity of a molten liquid material from an extruder 2 is lower by 10 to 40% than the velocity of the cooling liquid in the cooling passage 9. The jet of the molten liquid material extruded from the nozzle of the extruder 2 forms an angle of 45 to 90 deg. with the flow direction of the cooling liquid 1 in the cooling passage. The cooling liquid 1 within the short block forms the laminar flow within the static flow passage 9. When the resistance lowering agent is added to the cooling liquid 1, A Reynolds number lowers and the migration from the laminar flow to turbulence is shifted to a higher velocity. The gold layer fiber of the circular shape in the cross section of the amorphous or metastable crystalline structure having an arbitrary length and a diameter of 50 to 1000μm is obtd.