US 4,183,232 A · Method and machine for three-dimensional weaving for obtaining woven hollow reinforcements of revolution

Abstract

The invention relates to woven hollow structures. Its object is to provide a method and a machine making it possible to obtain hollow reinforcements of revolution by three-dimensional weaving using rods 11, circumferential yarns 12 and radial yarns 13. In the network of rods 11 made to rotate around the axis 16 are introduced and woven the yarns 12 and 13, the latter being knitted by a needle 28 in the form of a chain stitch, and the helical layers of yarns thus formed, resting on a plate 20 to which is imparted a progressive downward movement, slide along the rods 11 and are tamped by fingers 30 over which is mounted a pressure plate 38. Application to the fabrication of woven reinforcements of complex shape for hollow bodies of revolution in plastic material.

Claims15

Dependent claims

A method of producing a three-dimensional hollow woven reinforcement article comprising the steps of rotating a plurality of rod-bunches circumferentially arranged about a central axis, each rod bunch having a plurality of elongated rods spaced along a common radius and respectively lying in circumferentially spaced relation to the corresponding rod in the adjacent rod bunch, feeding a substantially continuous yarn between each of the adjacent radially-spaced rods to form superimposed courses of helically wound yarn;

simultaneously feeding a further yarn radially between adjacent circumferentially spaced rod bunches intermediate each of said courses and forming chain stitches in said further yarn enclosing the radially-spaced rods of each rod bunch between each of said courses of helically wound yarn;
and pressing said helically wound yarn and chain-stitched yarn along said rods to obtain a generally woven article of uniform density.

Apparatus for producing three-dimensional hollow woven reinforcement articles comprising:

a frame;
a plurality of rod bunches, each bunch comprising a plurality of radially-spaced rods carried by said frame, said bunches being arranged in circumferentially-spaced relation and rotatable about a central axis;
means rotatably carried by said frame for supporting said rods;
a needle carried by said frame for horizontal reciprocatory movement and in predetermined relation to the rotative path of said rods;
means for feeding a substantially continuous first yarn between corresponding one of adjacent radially-spaced rods;
means for simultaneously feeding a substantially continuous second yarn radially between each of said bunches;
and means for rotating said rods about said central axis and for reciprocating said needle in synchronism with the rotation of said rods, to simultaneously form a helix of superimposed courses of said first yarn between said radially spaced rods, having interposed between said courses a chain stitch of said second yarn binding said rods.

4 more elements

Dependencies are inferred from the claim text.

Method and machine for three-dimensional weaving for obtaining woven hollow reinforcements of revolution

Life of this patent

Method and machine for three-dimensional weaving for obtaining woven hollow reinforcements of revolution

Life of this patent

Abstract

Claims15