Textiles: manufacturing – Textile product fabrication or treatment – Fiber entangling and interlocking
Patent
1986-06-23
1988-12-13
Mackey, Robert K.
Textiles: manufacturing
Textile product fabrication or treatment
Fiber entangling and interlocking
28114, 28143, 156148, D04H 146, D04H 310, D04H 502
Patent
active
047900520
ABSTRACT:
Method and apparatus for producing homogeneously needled three-dimensional structures formed of superposed layers of fibrous material and the needled structures produced thereby. As layers of fibrous material are added to a stack of needled layers, the needling needles are moved away from the stack so as to maintain a uniform depth of needling over the entire stack, and to achieve a uniformly needled result. To permit the same density of needling in the initial layers, a substrate layer of needle penetrable material is used to support the initial layers which can then be needled as through they were layed on top of other needled layers. For the final layers, the needling rate is reduced to compensate for the lessened clogging of the needle in having fewer layers to penetrate in the final needling. Needled structures according to the invention find particular application in the manufacture of rocket motor parts, heat protective pieces, and friction pieces such as high performance brake discs or pads as used on aircraft and land vehicles.
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Mackey Robert K.
Societe Europeenne de Propulsion
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