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Process and apparatus for manufacturing axi-symmetrical three-dimensional structures

  • US 4,621,662 A
  • Filed: 12/20/1984
  • Issued: 11/11/1986
  • Est. Priority Date: 12/28/1983
  • Status: Expired due to Term
First Claim
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1. A process for manufacturing a three-dimensional axi-symmetrical and non-cylindrical structure constituted by superposed and interbonded layers of fibrous material comprising the steps of:

  • delivering onto a rotating mandrel having an axi-symmetrical and non-cylindrical profile corresponding to that of the structure to be manufactured a tape of a fibrous material having a width that is several times less than the length of a generatrix of said structure;

    winding the tape over the mandrel to form superposed layers in such a way that each of the layers is constituted by plural, successive turns of the tape of the fibrous material; and

    simultaneously with said winding step, interbonding the layers together by successively needling their constitutive turns by means of an assembly of needles which extend over a distance substantially equal to the width of said tape and longitudinally movable relative to the mandrel in order to perform said needling over the width of the layers in such a way as to be sequentially positioned at the location where the tape is delivered for needling the tape simultaneously as it is being delivered thereto and wound therearound substantially across the width of each of the layers.

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