Orbital foamed material extruder
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorDennis S. Tucker
Life of this patent
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Abstract
This invention is a process for producing foamed material in space comprising the steps of: rotating the material to simulate the force of gravity; heating the rotating material until it is molten; extruding the rotating, molten material; injecting gas into the extruded, rotating, molten material to produce molten foamed material; allowing the molten foamed material to cool to below melting temperature to produce the foamed material. The surface of the extruded foam may be heated to above melting temperature and allowed to cool to below melting temperature. The extruded foam may also be cut to predetermined length. The starting material may be metal or glass. Heating may be accomplished by electrical heating elements or by solar heating.
Claims15
A process for producing foamed material in space comprising the steps of:
- a) rotating said material to simulate the force of gravity;
- b) heating said rotating material until it is molten;
- c) extruding said rotating, molten material;
- d) injecting gas into said extruded, rotating, molten material to produce molten foamed material;
- and
- e) allowing said molten foamed material to cool to below melting temperature to produce said foamed material.
An apparatus for producing foamed material in space comprising:
- a) a furnace which rotates to simulate the force of gravity and heats said material until it is molten;
- said furnace having an inlet and an outlet;
- said outlet being located at the center of rotation of said furnace;
- b) an extrusion die adjacent said outlet;
- said extrusion die including a gas injector for injecting gas into said molten material;
- and
- c) a ram at the rear of said furnace for extruding said molten material through said extrusion die.
Dependencies are inferred from the claim text.