Coaxial single point powder feed nozzle
First Claim
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1. A nozzle for ejecting powder metal in a stream toward a workpiece comprising:
- an inner tube having an inlet for receiving said powder metal, an outlet for discharging said powder metal, and a supply channel therebetween;
an outer tube disposed radially outwardly of said inner tube and coaxially therewith, and having a mounting end fixedly Joined to said inner tube adjacent to said powder inlet, a nozzle outlet at an opposite distal end thereof, an intermediate portion axially therebetween spaced radially outwardly from said inner tube to define an annular flow manifold radially therebetween, and an inlet disposed in said intermediate portion for channeling a shaping gas into said manifold;
said powder outlet being disposed coaxially with said nozzle outlet and spaced axially aft therein to define therebetween an annular gas outlet for said manifold for channeling said shaping gas around said powder metal discharged from said powder outlet prior to discharge from said nozzle outlet; and
means disposed between said inner and outer tubes for confining said shaping as to confine said powder metal discharged from said powder outlet for reducing divergence of said discharged powder metal.
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Abstract
A coaxial single point powder feed nozzle includes an inner tube disposed coaxially within an outer tube. The inner tube has a powder inlet and powder outlet, and the outer tube has a gas inlet for receiving a shaping gas, and a single nozzle outlet. An intermediate portion of the outer tube is spaced radially outwardly from the inner tube to define an annular flow manifold therebetween which receives the shaping gas. The powder outlet is disposed coaxially with the nozzle outlet and is spaced therefrom to define an annular gas outlet for the manifold for channeling the shaping gas around the powder prior to discharge thereof from the nozzle outlet.
138 Citations
10 Claims
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1. A nozzle for ejecting powder metal in a stream toward a workpiece comprising:
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an inner tube having an inlet for receiving said powder metal, an outlet for discharging said powder metal, and a supply channel therebetween; an outer tube disposed radially outwardly of said inner tube and coaxially therewith, and having a mounting end fixedly Joined to said inner tube adjacent to said powder inlet, a nozzle outlet at an opposite distal end thereof, an intermediate portion axially therebetween spaced radially outwardly from said inner tube to define an annular flow manifold radially therebetween, and an inlet disposed in said intermediate portion for channeling a shaping gas into said manifold; said powder outlet being disposed coaxially with said nozzle outlet and spaced axially aft therein to define therebetween an annular gas outlet for said manifold for channeling said shaping gas around said powder metal discharged from said powder outlet prior to discharge from said nozzle outlet; and means disposed between said inner and outer tubes for confining said shaping as to confine said powder metal discharged from said powder outlet for reducing divergence of said discharged powder metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification