Extrusion apparatus and method for producing...

B - Operations – Transporting – 29 – C

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B29C 47/00 (2006.01) A21C 11/10 (2006.01)

Patent

CA 2199397

An extrusion apparatus for producing three-dimensional objects comprises at least one die (18, 20), an extruder (12), and a rotatable cutter plate (38). The die is disposed adjacent to an outlet end of the extruder (12). The die (18, 20) forms an opening defining a two-dimensional shape, and the extruder (12) forces an extrudable material through the opening in the die. The rotatable cutter plate (38) is disposed adjacent to the die. The cutter plate (38) is configured to obstruct different portions of the die opening (14, 16) at different times as the cutter plate (38) rotates so as to vary the shape of the extrudable material forced through the opening (14, 16) in the die and thereby create a three-dimensional shape. The cutter plate (38) is configured to fully obstruct the opening in the die during each revolution of the cutter plate so as to separate the extrudable material forced through the opening in the die into individual objects.

Appareil d'extrusion permettant d'obtenir des objets en trois dimensions. Cet appareil comprend au minimum une filière (18, 20), un extrudeur (12) et une plaque de coupe tournante (38). La filière est placée à proximité de l'extrémité de sortie de l'extrudeur (12). La filière (18, 20) forme une ouverture définissant une forme en deux dimensions, tandis que l'extrudeur (12) force le passage d'une matière extrudable à travers l'ouverture de ladite filière. La plaque de coupe tournante (38) est placée à proximité de la filière. Cette plaque de coupe (38) revêt une configuration telle que différentes parties de l'ouverture de la filière (18, 20) sont obstruées à des moments différents, au-fur et à-mesure que la plaque de coupe (38) tourne, de manière à varier la forme de la matière extrudable passant en force par l'ouverture (14, 16) de la filière (18, 20) et à créer ainsi une forme à trois dimensions. La plaque de coupe (38) est conçue de manière à obstruer totalement, à chaque tour, l'ouverture de la filière, de manière à séparer la matière extrudable passant en force par l'ouverture de la filière (18, 20) en objets individuels.

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