Preforms made directly from thermosetting composite chips
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United States of America Patent
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Aug 8, 2017
Grant Date -
Nov 17, 2016
app pub date -
May 13, 2015
filing date -
May 13, 2015
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Abstract
Preforms for use in molding composite parts are made directly from composite chips that are composed of fibers and an uncured thermosetting resin. Cold composite chips are formed into a stream of non-agglomerating chips that is used to fill the cavity of a preform tool. The non-agglomerating chips flow into the preform tool cavity to form a population of non-cohesive composite chips. The non-cohesive composite chips are then heated to form a preform made up of a consolidated population of cohesive composite chips in which the non-sticky uncured thermosetting resin of the non-cohesive chips has been converted to a sticky uncured thermosetting resin.
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