Powder granulation method and granulation device
AssigneeNara Machinery Co., Ltd.
InventorsHidetoshi Iwamatsu, Yoshiyuki Kato, Katsunobu Yoshimoto, Tsutomu Kurita, Masahiro Suzuki, Katsunori Ishii, Yoshiyuki Kihara
Life of this patent
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Abstract
A powder granulation method affords greater operation efficiency and working efficiency and enhanced product recovery rate by preventing powder from being adhered to a container inner wall while suppressing variability in particle size of product to the utmost. A plurality of scrapers are disposed so as to abut or come close to the inner face of a bottomed cylindrical container that accommodates powder so that the powder in the container is granulated by causing an inner bottom surface of the container to rotate on a horizontal plane.
Claims11
A powder granulation device, comprising:
- a cylindrical container configured to hold a starting-material powder, the cylindrical container having an inner bottom surface and an inner-side face contiguous with a peripheral edge portion of the inner bottom surface, the inner bottom surface of the cylindrical container being part of a circular flat plate and rotating in a horizontal plane;
- and
- a plurality of scrapers disposed adjacent the inner bottom surface and the inner-side face of the cylindrical container, and the scrapers having a leading end facing a rotation direction of the cylindrical container;
- the leading ends of the scrapers are tilted relative to the inner bottom surface of the cylindrical container and move one part of starting-material powder in the cylindrical container from a corner of the cylindrical container toward a center of the cylindrical container and another part of the starting-material powder in the cylindrical container in a twisting upward motion toward a peripheral edge of the cylindrical container and in a circumferential direction of the cylindrical container, during rotation of the cylindrical container;
- and
- a nozzle supplying a binder into the cylindrical container.
A powder granulation device, comprising:
- a machine frame;
- a cylindrical container arranged within the machine frame, the cylindrical container having an inner bottom surface and inner-side face, the inner bottom surface of the cylindrical container being part of a circular flat plate and rotating in a horizontal plane, and the inner-side face extending in a vertical direction and being contiguous to the inner bottom surface of the cylindrical container;
- a starting-material powder contained in the cylindrical container;
- and
- a plurality of scrapers disposed on the machine frame and adjacent the inner bottom surface of the cylindrical container, the scrapers are movable in a radial direction of the inner bottom surface of the container and in the vertical direction of the inner-side face, and leading ends of the plurality of the scrapers abut the inner bottom surface and the inner-side face of the cylindrical container.
Dependencies are inferred from the claim text.