Pi-preform with variable width clevis and related method of forming

Pi-preform with variable width clevis and related method of forming

  • CN 102,223,997 A
  • Filed: 10/27/2009
  • Published: 10/19/2011
  • Est. Priority Date: 10/29/2008
  • Status: Active Application
First Claim
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1. one kind forms the method that the variable-width U-shaped presss from both sides in woven preform, said method comprising the steps of:

  • (a) a plurality of adjacent layers are set, each layer has many warp fiber, and described warp fiber is parallel to each other, and forms vertical file;

    (b) many fiberfill fibers and warp fiber layers are weaved, with two or more legs that form substrate and stretch out, wherein from described substrate, described fiberfill fibers makes a plurality of layers of interlocking of described substrate, make a plurality of layers of interlocking of each leg, and, make the warp fiber interlocking in each layer;

    And(c) one or more warp fiber in the preform first that forms first leg is optionally withdrawed from, thereby make the width widen of the U-shaped folder that is formed between described two or more legs, perhaps, optionally add one or more warp fiber and enter described preform first, thereby, make the narrowed width that is formed on the described U-shaped folder between described two or more legs, perhaps, carry out above-mentioned two kinds of operations.

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