Device and method for processing powder and granular material
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 4, 2003
Grant Date -
N/A
app pub date -
Oct 6, 2000
filing date -
Apr 9, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pair of compression rollers 38a and 38b parallel with each other are provided and powder grains are supplied to a powder grain introduction/compression part 50 formed between the rollers 38a and 38b and, thereby, compression moldings of the powder grains are formed. A powder grain press/feed means 20 is provided in a front stage of the rollers 38a and 38b. The press/feed means 20 has a deaerating barrel 24 and previously presses the powder grains supplied between the rollers 38a and 38b. In side surfaces of the rollers 38a and 38b, side seals 37 are arranged with clearances 72 maintained from the rollers 38a and 38b. During pressing the powder moldings, the powder grains enter into the clearances so that closer layers are formed between the side surfaces of the compression rollers 38a and 38b and the side seals 37, thereby sealing the powder grain introduction/compression part 50. In a rear stage of the rollers 38a and 38b, a shearing device 75 is provided and shears the compression moldings formed by the rollers 38a and 38b. Torque of the shearing device 75 is detected by a torque sensor, and the compression rollers 38a and 38b and the powder grain transport means 17 are controlled in accordance with the detected torque.
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