Gyratory compactor with mold specimen extruder
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United States of America Patent
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Feb 25, 1997
Grant Date -
N/A
app pub date -
Oct 6, 1995
filing date -
Oct 6, 1995
priority date (Note) -
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Abstract
A gyratory compacting and mold extruding apparatus for compacting a specimen of material within a mold as the mold is gyrated includes a frame for supporting a mold, a mold gyrating carriage, a compaction ram and ram driving assembly, and a mold specimen extruder. The mold gyrating carriage receives a cylindrical mold having a cavity for holding material and an external peripheral flange about which the mold carriage is guided and driven to gyrate the mold while the ram is drivingly inserted through the open top of the mold. The ram driving assembly is supported by a flexible portion of the frame which flexes in reaction to force transferred by the ram. Strain gauges on the flexible portion of the frame provide feedback control data on ram force to an integrated computer control system which selectively controls the ram driving assembly to control the force transferred by the ram at least partially according to data generated by the strain gauges. The energy required to rotate the mold gyrating carriage around the mold is measured. A mold specimen extruder is provided on a common plane with the surface which supports the mold for gyration and compaction. An extrusion rod is powered to rise vertically through the bottom of the mold to extrude compacted material from the mold.
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