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AssigneeTechnologies Avancees Et Membranes Industrielles
InventorsPhilippe LESCOCHE, Jérôme ANQUETIL
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The invention relates to a device for the manufacture by extrusion of a porous tubular support from a ceramic composition, the device including: a fixed extrusion die (6) in which is mounted a punch holder (7) provided with a centered rectilinear punch (8a) and with at least one helically-shaped punch (8) wound around an axis of symmetry (X) along a winding direction and a winding pitch; a system (10) for driving in rotation the punch holder (7) around said axis of symmetry (X) along a direction of rotation opposite to the direction of winding of the punch(es) (8) and at a speed of rotation synchronized with the linear speed of extrusion of the ceramic composition.
A porous tubular support (1) for a tangential filtration membrane, in the form of a sintered monolithic ceramic porous body, manufactured by extrusion of a ceramic composition including a powdery solid inorganic phase and in which are arranged by extrusion using punches, a rectilinear channel (2a) centered on an axis of symmetry of the support and at least one circulation channel (2) for a fluid medium to be treated with a helical shape wound around the axis of symmetry, the channels having a limited wall roughness and lower than the granularity of the powdery solid inorganic phase of the ceramic composition.
A device for the manufacture by extrusion of a porous tubular support (2) from a ceramic composition, the device including:
The device according to the preceding claim, according to which the punch holder (7) is provided with several helically-shaped punches (8) disposed in at least two concentric rings.
A method for manufacturing a porous tubular support (1) from a ceramic composition, including the following operations:
Dependencies are inferred from the claim text.