METHOD FOR CONTINUOUSLY PREFORMING COMPOSITE MATERIAL IN UNCURED STATE
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
Aug 29, 2008
filing date -
Mar 27, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides a method for continuously preforming a prepreg material impregnated with thermosetting resin in an uncured state. A sheet of prepreg material is drawn out from a roller, laminated, and bent into a given cross-sectional shape via a bending device. The prepreg material is then continuously formed via a mold having a heater into a long product. The heat and pressure applied to the prepreg material in the mold is selected from a heating temperature that does not completely cure the thermosetting resin and a pressure range enabling the prepreg material to maintain the formed state. The above-mentioned preforming method enables to form members having a loose curvature (for example, a radius of 7 m or smaller) or stringers having a continuously varied curvature.
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