Processes for the manufacture of lightweight ceramic materials and articles produced thereby
OwnerRobin Crawford, John Douglasinventors
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Abstract
In a process for manufacturing foamed material an expansion agent, a ceramic base material and water are blended together. The blend is heated and pressurized to homogenize and liquefy or plasticize it. The blend is then extruded through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend. To make articles of manufacture, extrudate is cut to length, machined and fired, or is injection moulded while still malleable and then fired.
Claims20
A process for manufacturing foamed material comprising blending an expansion agent and a ceramic base material and water to produce a blend, heating and pressurizing the blend to homogenize and liquefy it, extruding the blend through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend, and cooling the extrudate.
A foam material manufactured by a process of blending an expansion agent and a ceramic base material and water to produce a blend, heating and pressurizing the blend to homogenize and liquefy it, extruding the blend through a die where, in the course of the extrusion, superheated water in the blend vaporizes to foam the blend, and cooling the extrudate.
Dependencies are inferred from the claim text.