Methods for making fiber reinforced wheels and other structural moldings
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United States of America Patent
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Dec 17, 1991
Grant Date -
N/A
app pub date -
Dec 19, 1989
filing date -
Dec 19, 1989
priority date (Note) -
Expired
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Abstract
Fibers are oriented in a radial direction in a mold so that the fibers are aligned in the molded article to react to radial loads. This is done by contracting a tubular braid of reinforcing fiber about its axis and expanding the contracted braid radially. The time for curing the article in the mold is reduced by internal electrical heating. The preferred ways of internal electrical heating are microwave heating, and the application of current to an internal conducting layer, conductive fibers or a grid for resistive heating. Moreover, the appearance of the molded article is improved by a sheet metal insert which is formed, for example by stamping or spinning, to match a face of the mold. The metal can be polished and chromed either before or after the molding process.
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