| 摘要 |
<p>Relatively long metal microfilaments made from film forming metal material. The microfilaments can be used to make superior high strength structural materials and/or can be used as reinforcing materials in plastic and rubber compositions. The microfilaments are made by forming a liquid film of molten film forming metal material across a coaxial blowing nozzle (5), applying a blowing gas (10) at a positive pressure on the inner surface of the metal film to blow the film and form an elongated hollow tube or cylinder (12) of molten metal. Means are provided for forming a thinned wall or weakended portion of the molten metal film forming the wall of elongated tube or cylinder. A transverse jet (13) is used to direct an entraining fluid (14) over and around the blowing nozzle (5) at an angle to the axis of the blowing nozzle. The entraining fluid (14) as it passes over and around the blowing nozzle (5) fluid dynamically induces a pulsating or fluctuating pressure field at the opposite or lee side of the blowing nozzle in the wake or shadow of the coaxial blowing nozzle and produces a laminar flow of entraining fluid in the vicinity of the forming elongated tube or cylinder. The continued movement of the entraining fluid (14) over the elongated tube or cylinder (12) produces asymmetric fluid drag forces on the tube or cylinder, and at the thinned walled or weakened wall portion longitudinally breaks the tube or cylinder to form a multiplicity of metal microfilaments, and detaches the metal microfilaments from the elongated tube or cylinder and from the coaxial blowing nozzle and the detached microfilaments are carried away from the blowing nozzle. Quench nozzles (18) can be disposed below and on either side of the blowing nozzle (5) to direct cooling fluid (19) at and into contact with the molten metal microfilaments (17) to rapidly cool and solidify the molten metal to form hardened metal microfilaments (17).</p> |
