Cold stretching and straightening machine type
Geministar

for stretched bars

Technical details

Cold roll and straightening machine type Geministar is the perfect machine to produce cold roll steel wire bars, ribbed or indented, to be used in products as reinforcing welded mesh, stirrups, cages and lattice girders for the civil and industrial construction, foundations and precast industry.

Cold roll and straightening machine type Geministar combine the cold rolling process of the wire rod with the wire straightening and cutting of the cold rolled reinforced wire bars to the desired length.

The shape and engineering details of the line allow to produce high-quality cold roll steel bars with excellent straightness and geometrical properties of the ribbed profile. The final product can feed any type of welding reinforcing mesh machine or cut and bend equipment.

Compared to traditional straightening machines, this combined system of bar production has the advantage of achieving a high production speed with a remarkable reduction in the handling operations of the raw materials (the wire rod is processed into bundles of ribbed or indented concrete wire bars in one single line, with an obvious optimization of in-house logistics).

Cold roll and straightening machine type Geministar is the perfect machine to produce cold roll steel wire bars, ribbed or indented, to be used in products as reinforcing welded mesh, stirrups, cages and lattice girders for the civil and industrial construction, foundations and precast industry.

Cold roll and straightening machine type Geministar combine the cold rolling process of the wire rod with the wire straightening and cutting of the cold rolled reinforced wire bars to the desired length.

The shape and engineering details of the line allow to produce high-quality cold roll steel bars with excellent straightness and geometrical properties of the ribbed profile. The final product can feed any type of welding reinforcing mesh machine or cut and bend equipment.

Compared to traditional straightening machines, this combined system of bar production has the advantage of achieving a high production speed with a remarkable reduction in the handling operations of the raw materials (the wire rod is processed into bundles of ribbed or indented concrete wire bars in one single line, with an obvious optimization of in-house logistics).

The core of the machine is the Geministar body. Inside there is the bullblock with horizontal axis equipped with the wire drawing capstans able to produce cold roll steel bars with a diameter range from Ø4 to Ø18mm and a length up to 12 meters.

The wire rod, pulled by the high-performances bullblock and driven by the PLC of the last generation, is cold rolled by the rolling cassettes (with the possibility to install up to three rolling cassettes) that reduce the diameter to the desired size improving the mechanical properties and adding the positive ribbing or the negative indentation to the wire. The machine can be also equipped with stretching panels (at the place of rolling cassettes) to produce stretched wire starting from re bar in coil.

After, a system composed by high speed straightening panels fully adjustable, straighten the wire that pulled by a motorized pulling system (that creates a counter pulling downstream the capstan), permits to convey the bars towards to the continuous flying shear for the cutting of the bars to the set length.

Finally, the bars are collected in the wire collector that allow the creation of partial sub-bundle and the creation of bundle of bars perfectly and automatically aligned by the machine. In the high-level version, all the machine can be equipped with binding device for the automatic creation of the partial sub-bundle and main bundle.

All the electric, hydraulic and lubrication systems are conveniently arranged inside the machine in order to simplify the maintenance of the line.

At the beginning of the machine a payoff system (with a vertical pay-off tower with two tilting fingers or with an horizontal pay-off beam, according to the wire sizes) is used to feed the machine with the plain wire produced in the hot mill process.

Other devices, like mechanical descaler or wire drawing lubricant machine are included.

Furthermore, the high flexibility of the Geministar, allows to combine the line also with a wire spooler to produce fixed or collapsible spools (that can be added also at a later stage, reducing the initial cost of the investment). This means that with the same machine, you can switch the production from bars to fixed or collapsible reels.

In the highest level of automation of our plants, the above mentioned line can be equipped with automatic vertical wire spoolers that make all the operations like insertion of the wire, cutting, change of the spools, samples taking, strapping, labeling and weighing of the coils without any intervention of the operator.

Working Speed (Max)

Up To 8 M/S For Bars – Up To 10 M/S For Coils/Spools

Inlet Wire Diameter

5,5 ÷ 18 Mm

Wire quality at entrance

low carbon wire rod

Outlet wire diameter

4 ÷ 16 mm

Type of wire at exit

ribbed or indented cold rolled bars or coils/spools (optional)

Bar length

Up to 12 m

Coil weight(max)

Up to 8 tons

*above technical data are indicative and subjected to change, based on customer requirements.

Final product

Highlights

  • Possibility to use 1, 2 or 3 rolling cassettes together (according to the requested reduction scale);
  • Stress relieving device to improve mechanical characteristics (tensile strength, ductility, elongation); Up to three straightening panels, to achieve a perfect straightness of bars at exit. The final product can feed any type of welding mesh machine or cut and bend equipment
  • High performance rotating shear unit, to allow continuous production up to 8 meters /second
  • Collecting and aligning bench for bars (adjustable up to 12 meters as length or more at request)
  • High Flexibility: possibility to add a horizontal or vertical spooler for change the production form bars into fixed or collapsible spools
  • Engineered for cold rolling and/or stretching process, with fast changing and settings;
  • Descaler rolls can automatically and directly adjustable by receipt from pulpit;
  • Horizontal bullblock, can be equipped with there (3) smooth capstans plus one (1) ‘’V’’ shape capstan for stretching that doesn’t require to be dismounted for production changing (drawn or stretched wire);
  • Remote control assistance kit
  • Automatic greasing system for rolling cassettes, stretching panels and stress relieving rolls
  • Automatic setting of straightening panels, adjustable by receipt directly from pulpit;
  • Possibility to install a dust conveyor integrated system, using conveyors below the payoff and main unit.
  • Simple maintenance procedure and fast set-up of the machine
  • Compared to traditional straightening machines, Geministar has a higher production speed with a remarkable reduction in the handling operations
  • Smart design of the line to reduce the layout dimensions
  • Customizable according to the customer needs.