Porous ceramic filter, method of manufacturing the same, ceramic filter manufacturing extrusion molding die and extrusion molding apparatus using the die

A method of manufacturing a porous ceramic filter by preparing a material compound containing particle material and a binder, molding the material compound within a die to a predetermined shape and sintering the molded product, wherein an ultrasonic vibrator is disposed within a wall of said die, and said molding is executed while applying ultrasonic waves by said ultrasonic vibrator to at least one surface of said molded product so that average particle size of said molded product continuously increases from said one surface.

A method of manufacturing a porous ceramic filter by preparing a material compound containing a particle material and a binder, molding the material compound under pressure within a die to a predetermined shape and sintering the molded product, wherein an ultrasonic vibrator is disposed within at least one location in a wall of said die for forming said molded product, and said molding is executed while applying ultrasonic waves by said ultrasonic vibrator to at least one surface of said molded product so that the average particle size is continuously varied through said molded product.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter, wherein an ultrasonic vibrator is disposed to at least one location within a side wall of said die for forming the molded product of the ceramic filter extruded by said extrusion device.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter composed of a cylindrical body with an exterior, having at least one through hole, comprising a mold having a cavity for forming the exterior of the molded product of a ceramic filter extruded by an extrusion device and at least one core disposed in the cavity of said mold by extending in an extruding direction and mounted in said mold for forming the through hole of said ceramic filter, wherein ultrasonic vibrators are disposed within at least one of said mold and said at least one core.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter with an exterior, an outer peripheral surface, a center through hole and a plurality of through holes formed between said center through hole and said outer peripheral surface of said filter and extending in the same direction as said center through hole, comprising a mold having a cavity for forming said exterior of the molded product of said ceramic filter extruded by said extrusion device and a first core disposed in the cavity of said mold by extending in an extruding direction for forming said center through hole and a plurality of second cores disposed between the inner wall surface of said mold and said first core for forming a plurality of said through holes, wherein at least one ultrasonic vibrator is disposed to at least one element selected from said mold, said first core and at least one of said second cores.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter, wherein an ultrasonic vibrator is disposed to at least one location within the side wall of said die so that ultrasonic waves may be applied during molding the molded product of a ceramic filter extruded by said extrusion device so that said molded product has particles whose average particle size is continuously varied from said wall's surface and means for pressurizing said molded body is provided.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter having an exterior composed of a cylindrical body having at least one through hole, comprising a mold having a cavity for forming said exterior of said ceramic filter extruded by an extrusion device and at least one core disposed in the cavity of said mold by extending in an extruding direction and mounted in said mold for forming the through hole of said ceramic filter, wherein ultrasonic vibrators are disposed in at least one of said mold and said at least one core, and means for pressurizing said molded body is provided.

A porous ceramic filter manufacturing extrusion molding die used by being coupled with an extrusion device in the manufacture of a porous ceramic filter having a center through hole and a plurality of through holes formed between the center through hole and an outer peripheral surface of the filter and extending in the same direction as the center through hole, comprising a mold having a cavity for forming an exterior of said ceramic filter extruded by said extrusion device and a first core disposed in the cavity of said mold by extending in an extruding direction for forming said center through hole and a plurality of second cores disposed between an inner wall surface of said mold and said first core for forming a plurality of said through holes, wherein at least one ultrasonic vibrator is disposed to at least one element selected from said mold, said first core and at least one of said second cores and means for pressing said molded body is provided.