The chain-link mesh is produced on mesh-weaving machines of various types and complexity from wire GOST 3282-74. Mostly galvanized wire is used. The process of production, packaging and acceptance of goods is prescribed in GOST 5336-80.
The production of chain-link from polymer-coated wire takes place not according to GOST, but according to TU, which are developed by enterprises for themselves.
Chain-link mesh can be produced on a primitive mesh weaving machine.
Where 1 is the screw, 2 is the knife.
The auger and knife are the basis of any equipment for the manufacture of chain-link mesh , which, according to GOST 5336-80, is called single steel woven mesh. The low-carbon wire, getting into the screw, with the help of a knife turns into a spiral. This helix is woven into another helix, forming a web of Rabitz mesh.
But this simplicity has a number of significant drawbacks.
The wire has unequal properties along its length, so, without a special system for tensioning and aligning the wire, a flat spiral after a primitive mesh weaving machine comes out as an uneven plane. As a result, the chain- link mesh fabric is uneven, not flat.
This simple mesh braider does not have a spiral length counter. Therefore, the spirals can come out of different lengths, the canvas of such a chain-link will not have parallel edges.
The primitive mesh weaving machine does not have a counter for the number of spirals, so the machine operator can easily make a mistake and the mesh will not be the length you expected. If the mesh roll is longer, then you do not need an extra meter of mesh, but if you do not have enough mesh meter, then this is already a problem.
The primitive machine does not have a special device that bends the ends of the spiral during the production of the Rabitz mesh . A woven mesh with not bent ends of the spiral is poorly unwound from a roll, and during its installation, the spirals unscrew from the mesh web, creating uneven edges of the fence. In addition, any passer-by can pull out any of the spirals in a second, and then the chain-link fence will cease to exist as a fence.
There is another significant drawback. Considering that the owner of a primitive machine is forced to save on the purchase of a high-performance semi-automatic machine, it is possible that savings will continue on the diameter of the wire, on the size of the cell, on the length and height of the roll.
Rabitz mesh production on UDFV-60
In the photo above - a German UDAFV-60 mesh weaving semi-automatic machine. This is a high performance machine. He weaves two spirals into the netting web at the same time, cuts the spirals at the same length, bends the ends of the spirals himself, winds the netting web into a roll, counts the required number of spirals to form a given length of the net roll. Such a mesh weaving machine produces about 500 m2 of woven mesh with a cell of 50 mm and about 350-400 m2 of mesh Chain-link with a cell of 35 mm in an 8-hour shift, this semi-automatic machine can produce a mesh of Chain-link with a cell of 20 to 60 mm, wire diameter up to 3 mm, roll height up to 2 m.
Such machines are installed in most of the large chain-link mesh factories and they produce the highest quality chain-link mesh.