Method of producing metal ferrules and device therefor

Abstract

A method of producing metal ferrules and a device therefor, wherein metal ferrules are produced with high productivity and high dimensional accuracy by arranging a plurality of long-sized core wires. A metal ferrule producing method and device, characterized in that a jig for receiving a metal to be electrocast is placed in an electrocasting tank, a holding unit in which a plurality of core wire holders for holding core wires are held in circumferential array is installed in the electrocasting tank, and the core wire holders and the holding unit are rotatable on their respective axes. It is preferable that the resistivity of the core wires be 5 x 10<-6> OMEGA cm or less. A core wire plated with a thin layer of metal having a resistivity of 5 x 10<-6> OMEGA cm or less may be used. Further, it is advisable to provide a conductive electric discharge body on the front end of the core wire. The resistivity of the conductor is preferably 10 x 10<-6> OMEGA cm or less, and the surface area of the conductive electric discharge body is preferably 10 - 100 times the outer surface area of the core wire. Further, the jig for receiving the metal to be electrocast is preferably such that a metal plate of given width extending longitudinally of the jig substantially throughout the length of the jig is formed to face in the direction of the core wire in such a manner as to project perpendicularly from the lateral surface of the jig. Further, the core wire holder is preferably provided with an elastic mechanism, such as a spring or rubber for tightening the core wire, or with a wide prop projecting outwardly of the holder.

Description

technical field [0001] The present invention relates to a manufacturing method and device for a metal ferrule, which uses electroforming to form a metal coating on the surface of a core wire, and then draws out the core wire from the formed metal coating to make a metal ferrule. Background technique [0002] The ferrule is one of the components of the connector that connects the silica-based optical fiber. The optical fiber connector is used to pass the optical fiber with a thickness of about 0.125mm into the ferrule and fix it so that the core positions in the center of the optical fiber are correctly grounded and connected to each other. [0003] The currently used hoops are made of stainless steel, zirconia or plastic, and zirconia is the mainstream. When manufacturing ferrules made of zirconia, first mix zirconia powder with resin, form it into a cylindrical shape by injection molding or extrusion molding, and then heat the molded product at a temperature of about 500°C...

AI Technical Summary

Problems solved by technology

That is, when the tension acting on the core wire is high, the core wire is stretched, and the diameter of the core wire varies in its length direction, and the outer diameter of the electroformed body obtained accordingly also varies, and a uniform and high-dimensional precision cannot be obtained. ferrule

In addition, when the tension is small, the core wire slackens, and likewise, the resulting electroform lacks uniformity

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