Method and apparatus for removing coatings from plastic laminates
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United States of America Patent
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-
Mar 3, 1992
Issued Date -
N/A
app pub date -
Jun 3, 1991
filing date -
Apr 27, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Abrasive method for the removal of coatings, such as paint, decorative films, overlays and the like from plastic surfaces, especially plastic laminates. The method operates by utilizing an impeller wheel which is movable at a substantially constant distance relative to the surface of a workpiece. A stream of abrasive particles is directed against the surface, and consists of sharp-edge steel-elastic plastic granules which impact with a velocity between 25 and 100 m/s. The impeller is guided steadily in several passes over all surface areas to be treated. After each pass a visual inspection is performed. Preferably the granules have a hardness of 3-3.5 on the Mohs hardness scale.
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