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Preconsolidating

This would permit the customer to maximize material usage by continuously repeating the pattern to be cut from the continuous length of material and thereby eliminate the scrap formed by using rectangular sheets. In one embodiment, the apparatus is for the automated cross-plying of a first, continuous ply of material and a plurality of second, discontinuous plies of material into a cross-plied continuous length of material, each of the first and the second plies of material having a longitudinal axis.

Ballistic resistant articles and fibers conventionally used in them are well known, as taught by, e.g., U. The apparatus comprises: a) means for advancing the first ply of material into a cross-plying zone; b) means for sequentially laying the second plies of material coplanarly on the first ply in the cross-plying zone with the longitudinal axis of each of the second plies rotated relative to the longitudinal axis of the first ply; c) means for preconsolidating the first and the second plies; and d) means for withdrawing the cross-plied material from the cross-plying zone.

The cross-piled material produced can be rolled up in a bolt, which also forms part of this invention, for subsequent processing or use. Field of the Invention The present invention relates to method and apparatus for the continuous, automatic production of cross-plied material, preferably for structural or anti-ballistic end uses and preferably for supply in roll form, i.e., like a bolt of cloth, for subsequent processing or use.

In each of the embodiments, when the second ply (discontinuous piece) releasably adheres to the second carrier web, it is preferred that the apparatus further comprises means for releasing the cross-plied material from the second carrier web.The apparatus of both the first and second embodiments may optionally comprise a second cutting means for cutting the first ply in a direction transverse to its longitudinal axis a sufficient number of times to form a plurality of discontinuous pieces of the first ply.In this instance, the means for sequentially laying the discontinuous pieces of the second ply on the first ply sequentially lays one of the pieces in register with one of the discontinuous pieces of the first ply.The apparatus comprises means for advancing a first, continuous ply of material into a cross-plying zone; means for sequentially laying a plurality of discontinuous second plies of material coplanarly on the first ply in the cross-plying zone with the longitudinal axis of each of the second plies rotated relative to the longitudinal axis of the first ply; means for preconsolidating the first and the second plies; and means for withdrawing the cross-piled material from the cross-plying zone.The method features the steps of advancing the first ply of material into a cross-plying zone; sequentially laying the second plies of material coplanarly on the first ply in the cross-plying zone with the longitudinal axis of each of the second plies rotated relative to the longitudinal axis of the first ply; preconsolidating the first and the second plies; and withdrawing the cross-piled material from the cross-plying zone.In yet a third embodiment, apparatus is provided for the automated production of cross-plied material from a first, continuous ply of material and a second, continuous ply of material, each of the plies of material comprising a network of unidirectional fibers substantially coated with a resin matrix.Each of the plies of material also has a longitudinal axis substantially in the direction of the unidirectional fibers, and both plies exhibit substantial interply adherence when brought into contact with one another.The means for sequentially laying the second plies of material preferably comprises, in combination: a second carrier web on which the discontinuous plies are separately carried; second pull means to pull the second carrier web with the discontinuous plies thereon so that each discontinuous ply and the first ply face each other in the cross-plying zone; and means for guiding each discontinuous ply and the first ply into contact with one another.It is preferred that the discontinuous plies releasably adhere to the second carrier web.The means for advancing the first ply of material into the cross-plying zone preferably comprises, in combination: a first carrier web on which the first ply is carried; first supply means for supplying the first ply of material on the first carrier web; and first pull means to pull the first carrier web from the first supply means under tension into the cross-plying zone.The preferred first supply means comprises a roll on which the first ply of material and the first carrier web are wound together, and the preferred first pull means comprises a pair of driven pinch rolls downstream of the cross-plying zone.

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  1. Feet. Developed by James M. Reed, AICP - [email protected] August 2017. Content intended for illustrative purposes only. Preconsolidation and Today.

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