Agglomerating apparatus for the continuous regranulation of thermoplastic wastes
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
Dec 12, 1989
filing date -
Dec 14, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The agglomerator includes a disk-shaped annular chamber which is confined on its periphery by an annular perforated die, the outside of which is swept by knives. The annular chamber narrows towards its periphery, and at least one pressing blade rotates in the chamber. The blade has an active flank which forms, with the perforated inside wall of the perforated die, a revolving plasticizing chamber which narrows in the direction opposite to that of revolution. Plastics wastes in the form of chips, flakes or a fleece, resulting from precomminution, are fed axially into the annular chamber and are precompacted by the pressing blade in the revolving plasticizing chamber. The wastes are degassed and plasticized by autogenously controlled pressure and temperature conditions and are forced through the perforated die. The narrowing of the chamber toward the periphery results in increased throughput capacity without causing thermal damage to the material.
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