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An Improved Method and Process of Producing Fine Metal Wire

IP.com Disclosure Number: IPCOM000033071D
Publication Date: 2004-Nov-24
Document File: 4 page(s) / 12K

Publishing Venue

The IP.com Prior Art Database

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An Improved Method and Process of Producing Fine Metal Wire

BACKGROUND:

This invention is directed to the field of wire production.

SUMMARY OF THE INVENTION:

The objective of this disclosure is to describe a new and improved process of producing very fine metal wires.  This process involves a continuous method of producing very fine metal wires by drawing the wire from a metal/glass “preform” that is designed to operate within a nearly conventional optical glass fiber drawing tower.  The metal/glass preform consists of a long cylindrical glass tube (initially hollow and closed at one end) that is filled a metal that one wants to draw out into fine wires. 

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS:

The objective of this disclosure is to describe a new and improved process of producing very fine metal wires.  This process involves a continuous method of producing very fine metal wires by drawing the wire from a metal/glass “preform” that is designed to operate within a nearly conventional optical glass fiber drawing tower.  The metal/glass preform consists of a long cylindrical glass tube (initially hollow and closed at one end) that is filled a metal that one wants to draw out into fine wires.  Upon heating and softening the closed end of the glass tube, that end of the tube can be drawn out into a long fiber that will carry a fine thread of the enclosed metal as long as the metal melts at temperatures lower than the softening point of the glass tube.  Rapid natural or assisted cooling of the drawn fiber, containing the very fine coaxial metal fiber will solidify the wire and harden the outer glass film surrounding the wire.  The wire produced in this way can be used as is (i.e., containing the glass outer film as an insulating layer) or it may be tightly wound into successive coils that cause the hardened glass envelope to break away from the wire, leaving a final coil of the bare wire for later use in some micro wiring application.   Or, the bare wire, stripped of its outer film of glass, may be treated in some other subsequent step to add a flexible layer of insulation.

Using this technique, it is possible to produce very long, very fine metal fibers or wires having very well defined metallurgical properties and dimensions.  These characteristics can be controlled by controlling the initial metal or metal alloy composition within the “preforms”, by controlling the ratio...