| 摘要 |
PURPOSE:To concurrently draw a number of Al wires without cut or seizure of the wire by drawing both plural Al wires contained together with a lubricant in a metal tube and the tube. CONSTITUTION:A bundle 10 of the prescribed number of wire stocks is passed through a tube containing a lubricant 11 and is inserted into a tube 12. An end of a tube 13 to be drawn consisting of the bundle 10 of the wire stocks containing the lubricant 11 and of the tube 12 is contracted by rollers to form a pointed part 14 and the tube 13 is drawn with a die 15. The tube 13 is drawn by the prescribed times with the percentage reduction of respective drawings being equal to the prescribed value. After the outer diameter of the tube 13 reaches the prescribed diameter, the tube 13 is submerged in a nitric acid solution 16 to dissolve only the copper tube 12 and to obtain the product of the prescribed number of Al fine wires separately without seizure.
|
