EXTRUDER HAVING VARIABLE MID-BARREL RESTRICTION AND ADJACENT HIGH INTENSITY MIXING ASSEMBLY

Improved, high Specific Mechanical Energy extrusion systems (20) are provided including a single or twin extruder (22) and an upstream preconditioner (24). The extruder (22) includes an elongated barrel (26) with at least one elongated, axially flighted, rotatable screw assembly (58) therein. The ba...

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Bibliographische Detailangaben
Hauptverfasser:	ROKEY, GALEN, J, PLATTNER, BRIAN, S
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS FOODS OR FOODSTUFFS HUMAN NECESSITIES MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLESOR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR PEELING VEGETABLES OR FRUIT IN BULK PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY ASINGLE OTHER SUBCLASS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:	Improved, high Specific Mechanical Energy extrusion systems (20) are provided including a single or twin extruder (22) and an upstream preconditioner (24). The extruder (22) includes an elongated barrel (26) with at least one elongated, axially flighted, rotatable screw assembly (58) therein. The barrel (26) includes a mid-barrel variable restriction valve assembly (32), and the screw assembly (58) has a disrupting/homogenizing screw section (66) therein upstream of the valve assembly (32). The screw section (66) includes a plurality of alternating pitch screw parts (82-92). Preferably, the barrel (26) also has an atmospheric vent (36) downstream of the vaive assembly (32). L'invention concerne des systèmes d'extrusion à énergie mécanique spécifique élevée améliorés (20) comprenant une extrudeuse unique ou double (22) et un dispositif de préconditionnement amont (24). L'extrudeuse (22) comprend un cylindre allongé (26) ayant au moins un ensemble de vis rotative allongée à filet axial (58) dans celui-ci. Le cylindre (26) comprend un ensemble de soupape de restriction variable à mi-cylindre (32), et l'ensemble de vis (58) a un tronçon de vis d'interruption/homogénéisation (66) dans celui-ci en amont de l'ensemble de soupape (32). Le tronçon de vis (66) comprend une pluralité de parties de vis à pas alterné (82 à 92). De préférence, le cylindre (26) a également un évent atmosphérique (36) en aval de l'ensemble de soupape (32).