A machine for manufacturing a reinforced net with hexagonal meshes including a plurality of permanently deformable wires, a reinforcing element, and a mechanism for the reciprocal coiling of first wires and second wires in twos. The mechanism has passages for the reinforcing elements, and a feed system for: the first wires, fed in from a plurality of containers mounted on board the machine and provided internally with a predetermined length of the first wires; for part of the second wires, fed in alternately with the first wires, so as to be interwoven therewith in twos in the coiling mechanism; and for the reinforcing elements, fed into the machine. For all the reinforcing elements, a wire receptacle is provided for one of the second wires, the wire receptacle being rotatable around the reinforcing element.

A machine for manufacturing a reinforced net with hexagonal meshes including a plurality of permanently deformable wires, a reinforcing element, and a mechanism for the reciprocal coiling of first wires and second wires in twos. The mechanism has passages for the reinforcing elements, and a feed system for: the first wires, fed in from a plurality of containers mounted on board the machine and provided internally with a predetermined length of the first wires; for part of the second wires, fed in alternately with the first wires, so as to be interwoven therewith in twos in the coiling mechanism; and for the reinforcing elements, fed into the machine. For all the reinforcing elements, a wire receptacle is provided for one of the second wires, the wire receptacle being rotatable around the reinforcing element.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (I) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with detent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21 are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

A coil winding apparatus includes: a cylindrical core rod nozzle configured to allow insertion of a narrowed core rod; a wire rod feeding unit configured to feeding a wire rod to the core rod nozzle; a wire rod holding tool configured to hold the wire rod fed from the wire rod feeding unit; a core rod winding unit configured to wind the wire rod drawn from the wire rod feeding unit by rotating the wire rod holding tool around the core rod nozzle; a core rod drawing unit configured to draw the core rod from the core rod nozzle; and a coil drawing unit configured to draw a wound wire formed by winding the wire rod on an outer periphery of the core rod nozzle from the core rod nozzle.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (1) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with &tent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21) are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

A metal net having entwined metal wires defining the meshes of the metal net comprises at least one elongate sensor element fixed integrally to the metal net, inserted into the net during the production thereof. The elongate sensor element may comprise a wire of a material having a low coefficient of variation of the resistivity and a high gauge factor, preferably formed from constantan, or else may be of the optical fibre or composite fibre type.

A machine for manufacturing a reinforced net with hexagonal meshes including a plurality of permanently deformable wires, a reinforcing element, and a mechanism for the reciprocal coiling of first wires and second wires in twos. The mechanism has passages for the reinforcing elements, and a feed system for: the first wires, fed in from a plurality of containers mounted on board the machine and provided internally with a predetermined length of the first wires; for part of the second wires, fed in alternately with the first wires, so as to be interwoven therewith in twos in the coiling mechanism; and for the reinforcing elements, fed into the machine. For all the reinforcing elements, a wire receptacle is provided for one of the second wires, the wire receptacle being rotatable around the reinforcing element.

A machine for manufacturing a reinforced net with hexagonal meshes including a plurality of permanently deformable wires, a reinforcing element, and a mechanism for the reciprocal coiling of first wires and second wires in twos. The mechanism has passages for the reinforcing elements, and a feed system for: the first wires, fed in from a plurality of containers mounted on board the machine and provided internally with a predetermined length of the first wires; for part of the second wires, fed in alternately with the first wires, so as to be interwoven therewith in twos in the coiling mechanism; and for the reinforcing elements, fed into the machine. For all the reinforcing elements, a wire receptacle is provided for one of the second wires, the wire receptacle being rotatable around the reinforcing element.

A steel wire netting, in particular a hexagonal netting, made of steel wires includes hexagonal meshes, in particular for civil engineering purposes, preferably for an application in the field of protection from natural hazards, wherein the steel wires are alternatingly twisted with neighboring steel wires and wherein the steel wires are formed from a high-tensile steel or at least have a wire core made of a high-tensile steel, wherein an, in particular average, ratio calculated from an, in particular average, mesh width of the hexagonal meshes and an, in particular average, mesh height of the hexagonal meshes, measured perpendicularly to the mesh width, amounts to at least 0.75, preferably to at least 0.8.

A hexagonal wire netting, a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting, the device including an assembly of tubes for leading the wires of which every other is twisted into a spiral shape, a spindle assembly and a drum receiving the wire netting, the drum being provided with detent elements. Between each tube leading the spirally twisted wire and the cooperating spindle a straightening guide is located having an inlet opening cooperating with the tube and an outlet opening cooperating with the spindle. The detent elements are arranged on the drum in such a way that the produced wire netting has meshes in which the proportion of the width to the length is less than 0.75.