| 摘要 |
PURPOSE:To make uniform the flow of the metal around a core wire and to prevent positional deviation and disconnection of the core wire in producing an eccentric composite metallic wire by providing a barrier wall near the extruding hole of a die in which the core wire is eccentrically passed, and extruding a different kinds of metal through the die. CONSTITUTION:The shape of a barrier wall 4 for controlling metal flow may not only be quadrilateral but be circular, elliptical or polygonal as well. The wall 4 is provided in the position near the smaller sectional area of the right and left sectional areas of a core wire 1 in the section of an extruding hole 3. The wall 4 may be usually one and an equally good result is obtd. by providing >=2 pieces of said walls in order to adjust finely the flow of metal. The space between the hole 3 and the wall 4 and the height of the barrier wall are required to be determined by the shape of the hole 3 and the eccentricity from the center of the wire 1. The width of the wall 4 is determined by not only the above-mentioned shape and eccentricity but also the material strength and extrution pressure of the die 2 to prevent the failure of said wall. |
