Patent ID: 6803017
Filing Date: 2004-10-12
Classification: B01F

Abstract:
Powder homogenizing apparatus, comprising:a cylindrical shell of circular section and of substantially horizontal axis, which shell is sealed and with a cylindrical barrel, said cylindrical barrel having a first end and a second end closed by a disk-shaped end plate, said shell being provided with at least one filler orifice located in the upper portion of said shell and at least one discharge orifice opening into the bottom of said shell; an assembly of cylindrical drums of circular section located inside the shell with which it is coaxial and fluidtight, said drum assembly comprising an inner drum and an outer drum each provided with a cylindrical wall, said cylindrical wall having a first end and a second end closed by a disk-shaped wall, the external face of the cylindrical wall of said outer drum being overlaid with blades that can homogenize the powder contained in the annular space formed between the cylindrical wall of the outer drum and the barrel of the shell, a space of revolution being formed between said inner and outer drums; a shaft disposed along said longitudinal axis through said cylindrical shell, mounted on a bearing at each end plate and on which said assembly of cylindrical drums is mounted in integral manner, said shaft comprising a first end portion provided with a first internal longitudinal channel and a second end portion provided with a second internal longitudinal channel, said first channel being connected, outside the shell, to a system for supplying cold air and said first end portion being provided inside said shell with at least one supply orifice for providing cold air to said space of revolution from said first channel, said second end portion being provided, inside said shell, with at least one exhaust orifice placing said space of revolution in fluid communication with said second channel, and said second channel being connected, outside said shell, to an air exhaust system to release air from said space of revolution, a sealing system being provided for each bearing; and drive means for rotating said shaft.