Extrusion die assembly for obtaining differently shaped products

Apparatus comprising a multiple nozzle die assembly for extrusion of a substance wherein the apparatus comprises:

• a first nozzle member defined by a wall which has inner and outer wall surfaces and which extends longitudinally from a first end to a second end wherein the inner wall surface is tubular and extends longitudinally about an axis and delimits a first duct which extends from a nozzle first end orifice to a nozzle second end orifice and wherein the tubular wall converges from the first end to the second end so that, transverse to the longitudinal axis, the inner and outer wall surfaces at the first end have cross-sectional sizes which are larger than those of, respectively, the inner and outer wall surfaces at the second end and so that the first end orifice is larger than the second end orifice;
• a diaphragm member which is positioned in the first nozzle member duct for delimiting an aperture for passage of an extrudate substance into the first duct;
• and (i) a second nozzle member having an inner tubular wall surface, (ii) a second diaphragm member and (iii) a disk member which circumscribe the first nozzle member and (iv) an extrudate substance feed member wherein the disk member is positioned at a position between the feed member and the second diaphragm member and wherein:
• the second nozzle member inner tubular wall surface extends longitudinally from a first end which delimits an orifice to a second end which delimits an orifice and which is configured to converge from the first end of the second nozzle member to the second end of the second nozzle member so that the first end wall surface orifice of the second nozzle member has a size larger than that of the second end wall surface orifice of the second nozzle member and which is positioned to longitudinally circumscribe the first nozzle member so that, when positioned, each of the first nozzle member outer wall surface and the second nozzle wall surface concomitantly converge from the first end of the second nozzle member to the second end of the second nozzle member and so that the second nozzle member wall surface is displaced from the first nozzle member outer wall surface to delimit first and second end orifices of the nozzle members and a second duct which extends from the first ends of the first and second nozzle members to the second ends of the first and second nozzle members and so that the longitudinal axis of the second duct is coaxial with the first nozzle member inner wall surface longitudinal axis;
• the second diaphragm member is positioned for delimiting an aperture for passage of an extrudate substance into the second duct;
• the disk member is integrated with the first nozzle outer wall surface and is configured with holes to allow passage of an extrudate substance therethrough to the second diaphragm member and second duct;
• and
• the feed member comprises (i) a first wall which defines a first chamber which diverges from a first end which delimits an orifice to a second end which delimits an orifice so that the second end orifice of the feed member is larger than the first end orifice of the feed member and has a size sufficient and is positioned for distributing an extrudate substance to the first end orifice of the first nozzle member and to the holes of the disk member and (ii) a second wall which has a first end which delimits an orifice and which is positioned for communicating with the feed member first end orifice for feeding an extrudate substance to the first wall first end orifice and chamber and which extends and diverges from the second wall first end to define a second chamber.