Magnetohydrodynamic formation of support structures for metal manufacturing
First Claim
1. A method of additive manufacturing, the method comprising:
- providing a liquid metal in a fluid chamber at least partially defined by a housing, the fluid chamber having an inlet region and a discharge region;
directing a magnetic field through the housing;
moving the discharge region in a controlled three-dimensional pattern; and
delivering electric current between electrodes at least partially defining a firing chamber within the fluid chamber between the inlet region and the discharge region, the electric current intersecting the magnetic field in the liquid metal in the firing chamber to eject the liquid metal from the discharge region; and
changing a velocity of the liquid metal ejected from the discharge region therein controlling porosity of one or more predetermined portions of an accumulation of the ejected liquid metal on a build plate or on a previously deposited layer of metal.
1 Assignment
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Accused Products
Abstract
Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. Porosity of one or more predetermined portions of objects fabricated from an accumulation of liquid metal droplets ejected using magnetohydrodynamic force can be controlled to form interfaces between support structures and parts within the object. Higher porosity along the interfaces, as compared to porosity along the support structures and the parts, can be useful for facilitating separation of the parts from the support structures.
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Citations
15 Claims
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1. A method of additive manufacturing, the method comprising:
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providing a liquid metal in a fluid chamber at least partially defined by a housing, the fluid chamber having an inlet region and a discharge region; directing a magnetic field through the housing; moving the discharge region in a controlled three-dimensional pattern; and delivering electric current between electrodes at least partially defining a firing chamber within the fluid chamber between the inlet region and the discharge region, the electric current intersecting the magnetic field in the liquid metal in the firing chamber to eject the liquid metal from the discharge region; and changing a velocity of the liquid metal ejected from the discharge region therein controlling porosity of one or more predetermined portions of an accumulation of the ejected liquid metal on a build plate or on a previously deposited layer of metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of additive manufacturing, the method comprising:
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providing a liquid metal in a fluid chamber at least partially defined by a housing, the fluid chamber having an inlet region and a discharge region; directing a magnetic field through the housing; moving the discharge region in a controlled three-dimensional pattern; and delivering electric current between electrodes at least partially defining a firing chamber within the fluid chamber between the inlet region and the discharge region, the electric current intersecting the magnetic field in the liquid metal in the firing chamber to eject the liquid metal from the discharge region; and changing a temperature of the liquid metal ejected from the discharge region therein controlling porosity of one or more predetermined portions of an accumulation of the ejected liquid metal on a build plate or on a previously deposited layer of metal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification