FR3064934A1 - METAL MONOFILAMENT VOLTAGE REGULATION INSTALLATION AND METAL MONOFILAMENT WINDING - Google Patents

Abstract

The installation (2) for regulating the tension and winding of a metal monofilament (4) comprises: - a regulating device (6) for the tension of the monofilament, - a device for winding (8) the monofilament . The regulating device (6) comprises: - a frame (10), - a regulating pulley (12) freely movable under the effects of the tension of the monofilament (4) and the weight of the control pulley, - means of detecting (16) a critical threshold of an indicator of the monofilament winding tension (4). The winding device (8) comprises: - a winding spool (18), - drive means (22) in rotation of the winding spool (18). The installation (2) comprises regulating means (24) for driving means (22) so as to reduce the speed of rotation of the winding spool (18) when the indicator reaches the critical threshold.

Description

Holder (s): COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN Limited partnership with shares.

Extension request (s)

Agent (s): CABINET NOVITECH.

INSTALLATION FOR REGULATING THE TENSION OF A METAL MONOFILAMENT AND FOR WINDING THE METAL MONOFILAMENT.

FR 3 064 934 - A1 (5d) The installation (2) for regulating the tension and winding of a metallic monofilament (4) comprises:

- a device for regulating (6) the tension of the monofilament,

- a winding device (8) of the monofilament.

The regulation device (6) comprises:

- a frame (10),

- a regulation pulley (12) freely movable under the effects of the tension of the monofilament (4) and the weight of the regulation pulley,

- Detection means (16) of a critical threshold of an indicator of the winding tension of the monofilament (4).

The winding device (8) comprises:

- a winding reel (18),

- drive means (22) for rotating the winding reel (18).

The installation (2) comprises regulating means (24) drive means (22) so as to reduce the speed of rotation of the winding reel (18) when the indicator reaches the critical threshold.

-1 Installation for regulating the tension of a metallic monofilament and winding the metallic monofilament

The subject of the invention is an installation for regulating the tension of a metallic monofilament and the winding of the metallic monofilament.

The invention applies to all types of metallic monofilaments and in particular to carbon steel monofilaments forming a metallic reinforcement intended for use in a tire.

Known from the state of the art installations for manufacturing metallic monofilament comprising, in this order in the direction of travel of the metallic monofilament, a drawing device for the metallic monofilament, a device for straightening the metallic monofilament and a winding device metallic monofilament making it possible to store the metallic monofilament and comprising a storage reel around which the metallic monofilament is wound.

This metal monofilament being intended to be used directly in plies then in tires, it is preferable that the metal monofilament resulting from a wire drawing device is a monofilament which presents a hanger as weak as possible in order to avoid any problem of flatness d 'a sheet resulting from the calendering of several of these metallic monofilaments. In fact, non-flat plies cause problems in cutting and joining the plies together during the manufacture of tires.

There are known from the state of the art tension regulation devices located between the straightening device and the winding device. However, the inventors have noticed that such tension regulation devices, by virtue of the minimum tension that they applied to the metallic monofilament, introduce, during the winding step of the metallic monofilament, an additional hanger in the monofilament metallic beyond the acceptable level to allow a correct calendering of the metallic monofilaments and obtaining flat sheets.

There is therefore a need for an installation and a method for limiting or even eliminating the introduction of additional hanger into the metal monofilament during the winding step of the metal monofilament.

The object of the invention is to provide a device and a method for winding and regulating the tension making it possible to obtain a straight metallic monofilament.

To this end, the subject of the present invention is an installation for regulating the tension of a metallic monofilament and the winding of the metallic monofilament comprising:

- a device for regulating the tension of the metallic monofilament,

- a device for winding the metallic monofilament arranged downstream of the regulating device in the direction of travel of the metallic monofilament, the regulating device comprising:

-2a frame, at least one pulley for regulating the tension of the metal monofilament mounted movable in rotation relative to the frame around an axis of rotation of the regulating pulley, the regulating pulley being mounted movable in translation relative to the frame in a direction substantially perpendicular to the axis of rotation of the regulating pulley, the regulating pulley being arranged so as to be freely movable in translation relative to the frame under the effects of the tension of the metallic monofilament and the weight of the pulley regulation, means for detecting at least a critical threshold of an indicator of the winding tension of the metallic monofilament corresponding to a higher critical winding tension value, the winding device comprising:

a winding coil movable in rotation about a winding axis, means for driving in rotation the winding coil around the winding axis, the installation comprising means for regulating the means of drive connected to the drive means and to the detection means so as to reduce the speed of rotation of the take-up reel when the indicator reaches the critical threshold corresponding to the value of the top critical take-up tension.

Advantageously, the installation according to the invention makes it possible to reduce or even eliminate the introduction of additional hanger into the metallic monofilament during the winding step.

Indeed, the inventors at the origin of the invention have identified that the main reason for the introduction of additional hanger during the winding step of the metal monofilament was a too high winding tension of the metal monofilament.

Thanks to the installation according to the invention, and in particular thanks to the free movement of the regulation pulley (s), the tension applied to the metal monofilament is solely a function of the weight of the pulley (s), the number of pulleys, the speed d winding as well as its piloting. Thus, according to the tolerable additional hanger, the person skilled in the art will determine the number and the nature of the pulley or pulleys, the mass of the elements of the regulation device applying a tension on the metallic monofilament but also the value of winding tension. critical superior. In accordance with the invention, when the indicator reaches the critical threshold corresponding to the critical upper winding tension value, the regulation means make it possible to reduce the speed of rotation of the winding reel and therefore the winding tension applied to metallic monofilament. This limits the introduction of additional hangers into the metal monofilament. It is therefore by acting on the winding speed that the winding tension, and therefore the additional hanger, are controlled.

Finally, thanks to the use of a relatively low winding tension, it is thus possible to wind a large length of metallic monofilament on the winding reel without risking crushing the hub of the reel when it is made of steel, or without it requiring a change of hub

-3 coil for a stronger and more expensive hub. Indeed, during the winding, the successively wound layers exert a hooping force. This hooping force is higher the higher the number of coiled layers and the higher the winding tension. By using a too high winding tension, as is the case in the prior art, the hub of the coil is crushed when reaching a relatively low number of layers wound on the coil. By using the device according to the invention and therefore a relatively low winding tension, the number of layers that can be wound around the hub and therefore the storage capacity of the coils is increased.

The term “metallic monofilament” means a monofilament made of a metallic material, this material being able to consist of a metallic core and possibly of one or more layers of metallic or non-metallic coating. Such coating layers can for example be a layer of brass, a layer of an adhesive composition or even a layer of an adhesion primer. Such a metallic monofilament has a main axis describing a substantially rectilinear trajectory when it is held under low tension. In other words, it is not preformed, does not have any helical or wave form and is not assembled (in contact) with another metallic monofilament.

The installation according to the invention may also include one or more of the characteristics below, considered individually or according to all technically possible combinations:

The regulating means are arranged so as to reduce the speed of rotation of the winding reel as long as the indicator exceeds the critical threshold corresponding to the value of critical upper winding tension. Thus, the decrease in the speed of rotation is continuous until the value of the winding tension becomes sufficiently low again, that is to say as long as the indicator exceeds the critical threshold corresponding to the tension value critical upper winding. By exceed, it is meant that, when the indicator is an increasing function of the speed of rotation, to exceed means to be higher than the critical threshold and that, when the indicator is a decreasing function of the speed of rotation, to exceed means to be lower than the critical threshold, and / or

The regulating means are arranged such that the critical upper winding tension value is less than or equal to 1000 g, preferably 800 g, more preferably 600 g and even more preferably 500 g. The higher the critical upper winding tension value, the greater the additional hanger introduced into the metallic monofilament. Thus, it is preferable to reduce this value of critical upper winding tension as much as possible according to the tolerable additional hanger and the speed of rotation which also conditions the productivity of the installation; and or

The installation comprises means for detecting at least a critical threshold of an indicator of the winding tension of the metallic monofilament corresponding to a lower critical winding tension value; and or

-4 The means for regulating the drive means are connected to the drive means and to the detection means so as to increase the speed of rotation of the winding coil when the indicator reaches the critical threshold corresponding to the value of critical lower winding tension. Thus, this makes it possible to avoid any floating of the metallic monofilament in the installation and to eliminate any risk of the monofilament leaving the various constituent elements of the installation, in particular any exit from the pulleys or the guide elements; and or

The regulating means are arranged so as to increase the speed of rotation of the take-up reel as long as the indicator exceeds the critical threshold corresponding to the lower critical winding tension value. Thus, the increase in the speed of rotation is continuous until the value of the winding tension becomes sufficiently high again, that is to say as long as the indicator exceeds the critical threshold corresponding to the tension value critical lower winding. By exceed, it is meant that, when the indicator is an increasing function of the speed of rotation, to exceed means to be higher than the critical threshold and that, when the indicator is a decreasing function of the speed of rotation, to exceed means to be lower than the critical threshold ; and / or the regulating means are arranged so that the critical lower winding tension value is greater than or equal to 150 g, preferably 200 g, more preferably 300 g. The higher the critical lower winding tension, the lower the risk of flutter; and or

The detection means comprise means for measuring the winding tension of the metallic monofilament between the regulating device and the winding device. Such detection means make it possible to directly determine the winding tension of the metallic monofilament. Thus, the winding tension indicator is, in this embodiment, the winding tension of the metallic monofilament itself. In order to have a tension as significant as the winding tension of the monofilament on the winding reel, the tension measurement means are arranged downstream of the regulating device and upstream of the winding arrangement; and or

The regulating means are arranged so as to reduce the speed of rotation of the take-up reel when the take-up tension of the metal monofilament passes above the critical upper take-up tension value; and or

The regulating means are arranged so as to increase the speed of rotation of the take-up reel when the take-up tension of the metallic monofilament falls below the critical lower take-up tension value; and or

The regulating means are arranged so as to reduce the speed of rotation of the take-up reel as long as the take-up tension of the metallic monofilament is above the critical upper take-up tension value; and or

-5 The regulating means are arranged so as to increase the speed of rotation of the take-up reel when the take-up tension of the metallic monofilament is below the critical lower take-up tension value; and or

The regulating means are arranged so as to increase the speed of rotation of the take-up reel as long as the take-up tension of the metallic monofilament is below the critical lower take-up tension value; and or

The detection means comprise means for detecting at least one critical position of the regulation pulley corresponding to the critical upper winding tension value. Such detection means make it possible to indirectly determine the winding tension of the metallic monofilament. Thus, the winding tension indicator is, in this embodiment, the position of the regulating pulley. In addition, in this embodiment, the only detection of the critical position is sufficient to detect the achievement of the critical upper winding tension value unlike the embodiment in which the winding tension is measured directly and in which continuous measurement is required. The critical position can be characterized by an angle value or a function of the angle value, a coast value or a function of the coast value, the triggering of a sensor, whatever the nature of this sensor. (optics, pressure, proximity, contactor, sound, etc.); and or

The regulating means are arranged so as to reduce the speed of rotation of the take-up reel when the regulating pulley reaches the critical position corresponding to the critical upper winding tension value; and or

The regulating means are arranged so as to reduce the speed of rotation of the winding reel as long as the regulating pulley exceeds the critical position corresponding to the value of the critical upper winding tension; and / or the detection means comprise means for detecting at least one critical position of the regulating pulley corresponding to the value of the critical lower winding tension. Analogously to the above, the winding tension indicator is, in this embodiment, the position of the regulating pulley. In addition, in this embodiment, the only detection of the critical position is sufficient to detect the achievement of the lower critical winding tension value unlike the embodiment in which the winding tension is measured directly and in which continuous measurement is required. The critical position can also be characterized by an angle value or a function of the angle value, a coast value or a function of the coast value, the triggering of a sensor, whatever the nature of this sensor (optical, pressure, proximity, contactor, sound, etc.); and or

The detection means comprise means for detecting at least one critical position of the regulation pulley corresponding to a critical lower winding tension value; and or

The regulating means are arranged so as to increase the speed of rotation of the winding reel when the regulating pulley reaches the critical position corresponding to a critical lower winding tension value; and or

The regulating means are arranged so as to increase the speed of rotation of the winding reel as long as the regulating pulley exceeds the critical position corresponding to a lower critical winding tension value; and or

The regulating device comprises means for guiding in curvilinear translation of the regulating pulley relative to the frame, preferably means for guiding in circular translation of the regulating pulley relative to the frame; and or

The means for guiding in curvilinear translation comprise a lever carrying the regulating pulley, the regulating pulley being mounted movable in rotation relative to the lever, the lever being mounted movable in rotation relative to the frame around an axis of rotation of the lever. ; and / or the regulation device comprises means for guiding in rectilinear translation of the regulation pulley with respect to the frame; and or

The means for guiding in rectilinear translation comprise a guide slide for the regulating pulley, the axis of the regulating pulley being mounted movable in translation in the guide slide; and or

The regulation device comprises several pulleys for regulating the tension of the metal monofdament mounted movable in rotation relative to the frame around a common axis of rotation of the regulating pulleys, each regulating pulley being mounted movable in translation relative to the frame according to a direction substantially perpendicular to the common axis of rotation of the regulation pulleys, the regulation pulleys being arranged so as to be freely movable in translation relative to the frame under the effects of the tension of the metallic monofilament and the weight of the regulation pulleys ; and or

The regulation pulleys are movable in rotation independently of each other; and / or the regulating device comprises at least one pulley for deflecting the metal monofilament mounted movable in rotation relative to the frame around an axis of rotation of the pulley deflection, the deflection pulley being fixed in translation relative to the frame ; and or

The regulating device comprises several pulleys for deflecting the metal monofilament mounted movable in rotation relative to the frame around a common axis of rotation of the idler pulleys, each idler pulley being fixed in translation relative to the frame; and / or The return pulleys are movable in rotation independently of each other; and / or The mass of the regulation pulley (s) is less than or equal to 1500 g, preferably 800 g; and or

The or each regulation pulley comprises a monolithic pulley roller made of a material having a density less than or equal to 7 g.cm-3, preferably 2 g.cm-3. By monolithic is meant that the roller forms a piece molded from a single element unlike a roller consisting of several elements made of materials of different natures and assembled together; and or

The roller of the or each regulating pulley is made of a polymeric material. Such examples of polymeric material are nylon, polyester or even polytetrafluoroethylene; and or

The or each regulating pulley comprises a roller of substantially cylindrical shape having a winding diameter De of the metallic monofilament at least partly around the roller, the diameter De checks the relationship Dc> 200.d in which d is the diameter of the monofilament metallic. Thanks to such regulating pulleys, the risk of introducing an additional hanger is further reduced; and or

The or each return pulley comprises a roller of substantially cylindrical shape having a winding diameter Dr of the metal monofilament at least partially around the roller, the diameter Dr checks the relationship Dr> 200.d in which d is the diameter of the monofilament metallic. Thanks to such deflection pulleys, the risk of introducing an additional hanger is further reduced; and or

The winding reel comprises a reel hub of substantially cylindrical shape having a winding diameter De of the metal monofilament around the hub, the diameter De verifies> 200.d. Again, this further reduces the risk of introducing an additional hanger.

The invention finally relates to a method for regulating the tension of a metallic monofilament and winding the metallic monofilament by means of an installation for regulating the tension of a metallic monofilament and winding the metallic monofilament comprising :

- a device for regulating the tension of the metallic monofilament,

- a device for winding the metal monofilament arranged downstream of the regulating device in the direction of travel of the metal monofilament, the winding device comprising a winding reel movable in rotation about a winding axis, method in which detects a critical threshold of an indicator of the winding tension of the metallic monofilament corresponding to a higher critical winding tension value, and in which, when the indicator reaches the critical threshold corresponding to the tension value d 'critical upper winding, the rotation speed of the winding reel is reduced.

The process can include one or more of the characteristics below, considered individually or in all technically possible combinations:

The rotation speed of the take-up reel is reduced as long as the indicator exceeds the critical threshold corresponding to the upper critical take-up tension value; and or

- 8 A critical threshold of an indicator of the winding tension of the metallic monofilament corresponding to a lower critical winding tension value is detected; and / or When the indicator reaches the critical threshold corresponding to the critical lower winding tension value, the speed of rotation of the winding reel is increased; and / or the speed of rotation of the winding reel is increased as long as the indicator exceeds the critical threshold corresponding to the lower critical winding tension value; and / or the winding tension of the metal monofdament is measured between the regulating device and the winding device; and or

The speed of rotation of the take-up reel is reduced when the take-up tension of the metallic monofilament passes above the critical upper take-up tension value; and or

The speed of rotation of the take-up reel is reduced as long as the take-up tension of the metal monofdament is above the critical upper take-up tension value; and or

The speed of rotation of the take-up reel is increased when the take-up tension of the metal monofilament falls below a critical lower take-up tension value; and or

The speed of rotation of the take-up reel is increased as long as the take-up tension of the metallic monofilament is below the critical lower take-up tension value; and or

At least one critical position of the regulation pulley is detected corresponding to the value of the critical upper winding tension; and or

The speed of rotation of the take-up reel is reduced when the regulating pulley reaches the critical position corresponding to the upper critical take-up tension value; and / or the rotation speed of the take-up reel is reduced as long as the regulating pulley exceeds the critical position corresponding to the critical upper take-up tension value; and or

At least one critical position of the regulating pulley is detected corresponding to a critical lower winding tension value; and or

The speed of rotation of the winding reel is increased when the regulating pulley reaches the critical position corresponding to a critical lower winding tension value; and or

The speed of rotation of the take-up reel is increased as long as the regulating pulley exceeds the critical position corresponding to a critical lower take-up tension value; and or

The metallic monofilament has a diameter d ranging from 0.05 m to 0.50 mm, preferably from 0.10 mm to 0.45 mm, more preferably from 0.25 mm to 0.45 mm and even more preferably from 0.28 mm to 0.40 mm.

The critical upper winding tension value is less than or equal to 1000 g, preferably 800 g, more preferably 600 g and even more preferably 500 g.

The critical lower winding tension value is greater than or equal to 150 g, preferably 200 g, more preferably 300 g.

Preferably, such a metallic monofilament comprises a metallic steel core. Preferably, the steel comprises a carbon content ranging from 0.2% to 1% by mass and more preferably from 0.4% to 0.9% by mass. Preferably, the steel comprises a manganese content ranging from 0.3% to 0.7% by mass, a silicon content ranging from 0.1% to 0.3% by mass, a phosphorus content ranging at most up to 0.045% mass bound, a sulfur level up to 0.045% mass inclusive and a nitrogen content up to 0.008% mass inclusive. Optionally, the steel comprises at most 0.1% terminal inclusive, preferably 0.05% terminal inclusive, and more preferably 0.02% terminal inclusive by mass of vanadium and / or molybdenum. In one embodiment, the steel used comprises less than 0.5%, preferably at most 0.05% terminal included, and more preferably at most 0.02% terminal included by mass of chromium. In another embodiment using so-called stainless steel, the steel comprises at least 0.5% terminal included, preferably at least 5% terminal included and more preferably at least 15% terminal inclusive by mass of chromium. Preferably, a stainless steel comprises at least 2% terminal inclusive, preferably at least 4% terminal inclusive and more preferably at least 6% by mass of nickel.

The present invention will be better understood in the light of the following description which is given only for information and which is not intended to limit said invention, accompanied by the following figures:

FIG. 1 illustrates an installation for regulating the tension and winding of a metallic monofilament according to a first embodiment,

FIG. 2 illustrates this installation according to a second embodiment,

FIG. 3 illustrates this installation according to a third embodiment,

FIGS. 4a and 4b illustrate regulation pulleys and return pulleys of these installations, and

- Figure 5 illustrates a winding coil of these installations.

In the various figures, similar elements are designated by identical references. In addition, the different elements are not necessarily shown to scale in order to present a view making it easier to understand the invention.

- ίο FIG. 1 shows an installation 2 for regulating the tension of a metallic monofilament 4 and for winding the metallic monofilament 4 according to a first embodiment. This installation 2 comprises a device 6 for regulating the tension of the metallic monofilament 4 and a device for winding 8 the metallic monofilament 4. The winding device 8 is arranged downstream of the regulating device 6 in the direction of travel of the monofilament metallic 4.

The purpose of the tension regulation device 6 is to regulate the tension of the metallic monofilament 4 before the winding step and to avoid the introduction of an intolerable additional hanger into the metallic monofilament 4. Indeed, a tension too high winding can lead to the introduction of an intolerable additional hanger in the metal monofilament 4 during the winding of the metal monofilament 4. Conversely, a too low winding tension can cause a floating phenomenon, the metallic monofilament 4 then running the risk of leaving the elements of the installation 2, in particular the guide elements. It is therefore preferable to keep a certain tension without however exceeding a critical upper winding tension.

The device 6 for regulating the tension of the metallic monofilament 4 comprises a frame 10 and at least one pulley for regulating the tension of the metallic monofilament 4. The regulating pulley 12 comprises a roller 13 for a pulley. This roller 13 is monolithic and is here made of a material having a density less than or equal to 7 g.cm-3, preferably 2 g.cm-3, in this case in a polymeric material, here nylon. The pulley is an element which undergoes high mechanical stresses. The material of the roller which is in contact with the monofilament must therefore be sufficiently resistant to endure the stresses of tension but also the wear by friction. In addition, the polymer material makes it possible to obtain a pulley which is sufficiently light so as not to increase the winding tension excessively while nevertheless ensuring the regulating function of the pulley 12. The roller 11 has a winding diameter of of the metallic monofilament 4 at least partly around the roller 11. The diameter De checks the relation Dc> 200.d in which d is the diameter of the metallic monofilament 4. In the present case, the diameter De is here the diameter of the surface external of a groove for passage of the metallic monofilament 4 and here Dc = 100 mm. The regulating pulley 12 is mounted movable in rotation relative to the frame 10 around an axis of rotation 14, for example by means of a bearing interposed between the roller 11 and the axis 14 or else by direct contact between the roller 11 and the axis 14. In addition, the regulation pulley 12 is mounted movable in translation relative to the frame 10 in a direction substantially perpendicular to its axis of rotation 14. The regulation pulley 12 is arranged so as to be freely movable in translation relative to the frame 10 under the effect of its own weight and the tension of the metal monofilament 4 which is wound at least partially around the regulating pulley 12. Thus, the regulating pulley 12 is not motorized, nor actuated by any mechanical device capable of giving it a movement other than the metallic monofilament 4 and its own weight.

- The regulating device 6 can also include at least one return pulley 13 of the metal monofilament 4 mounted movable in rotation relative to the frame 10 around an axis of rotation 15, the return pulley 13 being fixed in translation relative to to the frame 10. The return pulley 13 comprises a pulley roller 17. The roller 17 has a winding diameter Dr of the metallic monofilament 4 at least partially around the roller 17. The diameter Dr checks the relationship Dr> 200.d. In this case, the diameter Dr is here the diameter of the external surface of a groove for the passage of the metallic monofilament 4 and here Dr = 100 mm.

The axis of rotation 15 and the axis of rotation 14 are parallel to each other.

The regulating device 6 also comprises means 16 for detecting at least one critical threshold of an indicator of the winding tension of the metallic monofilament 4 corresponding to a higher critical winding tension value. The regulating device 6 also comprises means 16 for detecting at least a critical threshold of an indicator of the winding tension of the metallic monofilament 4 corresponding to a lower critical winding tension value.

The critical upper winding tension value corresponds to a maximum tension to which the metallic monofilament 4 can be subjected without this representing a risk of introducing an intolerable hanger into the metallic monofilament 4. The winding tension value lower critical corresponds to a minimum tension to which the metallic monofilament 4 can be subjected without this representing a risk of floating of the metallic monofilament 4.

The regulating device 6 may comprise means for guiding in curvilinear translation 28 of the regulating pulley 12 relative to the frame 10. These means for guiding in curvilinear translation 28 are here guiding means in circular translation. The rotary guide means 28 may comprise a lever 30 carrying the regulating pulley 12. Said regulating pulley is mounted movable in rotation relative to the lever 30. The lever is mounted movable in rotation relative to the frame 10 around a axis of rotation 32 of the lever.

The axis of rotation 32, the axis of rotation 15 and the axis of rotation 14 are preferably parallel to each other.

The indicator of the winding tension of the metal monofilament according to this first embodiment corresponds to the position of the regulating pulley 12. It is therefore the position of the regulating pulley 12 which will be detected by the detection means 16.

The detection means 16 comprise means for detecting at least one critical position of the regulation pulley 12 corresponding to the critical upper winding tension value and at least one critical position of the regulation pulley 12 corresponding to a critical lower winding tension value.

The detection means 16 can for example be optical detectors or magnetic detectors. Preferably, the detection means comprise a photoelectric cell.

The winding device 8 comprises a winding reel 18 movable in rotation about a winding axis 20. As illustrated in FIG. 5, the winding reel 8 comprises a

- 12 coil hub 19 of substantially cylindrical shape having a winding diameter De of the metal monofdament 4 around the hub 19. The diameter De checks the relationship De> 200.d. In this case, the diameter De is here the diameter of the external surface of the hub 19 and here is between 100 mm and 380 mm, and more preferably between 100 mm and 200 mm.

Said winding device 8 also comprises drive means 22 for rotating the winding reel around the winding axis 20, for example a motor.

As illustrated in FIG. 1, the winding axis 20, the axis 14, the axis 15 and the axis 32 can be parallel to each other.

The installation 2 comprises regulation means 24 of the drive means 22. The regulation means 24 are connected to the drive means 22 and to the detection means 16. The regulation means 24 receive a signal from the detection means 16 and adjust the speed of rotation of the winding reel 18 by acting on the drive means 22.

The regulation means 24 are arranged so as to reduce the speed of rotation of the winding reel 18 when the indicator reaches the critical threshold corresponding to the critical upper winding tension value, and here when the regulation pulley 12 reaches the critical position corresponding to the critical upper winding tension value. Reducing the speed of rotation of the take-up reel 18 makes it possible to reduce the take-up tension.

Similarly, the regulating means 24 are arranged so as to increase the speed of rotation of the winding reel 18 when the indicator reaches the critical threshold corresponding to the critical lower winding tension value, and here when the regulation pulley 12 reaches the critical position corresponding to the critical lower winding tension value. Increasing the rotational speed of the take-up reel 18 increases the take-up tension.

The winding tension is therefore controlled by acting on the winding speed of the metallic monofilament 4.

The regulation means 24 of the drive means 22 are arranged so that the critical upper winding tension value is less than or equal to 1000 g. Said regulating means 24 of the driving means 22 can for example be arranged so that the critical upper winding tension value is less than or equal to 800 g, preferably 600 g and more preferably 500 g.

Said regulating means 24 of the driving means can be arranged so that the critical lower winding tension value is greater than or equal to 150 g, preferably 200 g and more preferably 300 g.

The adjustment of the upper critical and lower critical winding tension values makes it possible to limit or even eliminate the introduction of a hanger into the metal monofilament during the winding step and to limit or even eliminate any risk of floating of the monofilament metallic in the installation.

- 13 In order to maintain a suitable tension throughout the process of winding the monofialment 4, the regulating means 24 are arranged so as to reduce the speed of rotation of the winding reel as long as the indicator exceeds the critical threshold corresponding to the critical upper winding tension value. In this first embodiment, the regulating means 24 are arranged so as to reduce the speed of rotation of the winding reel 18 as long as the regulating pulley 12 exceeds the critical position corresponding to the upper winding tension value. critical.

Similarly, the regulating means 24 are arranged so as to increase the speed of rotation of the take-up reel as long as the indicator exceeds the critical threshold corresponding to the value of the critical lower take-up tension. In this first embodiment, the regulating means 24 are arranged so as to increase the speed of rotation of the winding reel 18 as long as the regulating pulley 12 exceeds the critical position corresponding to a lower winding tension value critical.

According to a second embodiment illustrated in FIG. 2, the regulating device 6 comprises means for guiding in rectilinear translation 34 of the regulating pulley 12 relative to the frame 10.

The guide means in rectilinear translation 34 may comprise a guide slide 36 of the regulating pulley 12, the axis 14 of the regulating pulley being mounted movable in translation in the guide slide 36.

As in the first embodiment, the indicator of the winding tension of the metal monofilament corresponds to the position of the regulating pulley 12. On the other hand, the movement of the regulating pulley 12 relative to the frame is no longer a curvilinear translation but a rectilinear translation.

The other characteristics of the regulation pulley 12, the deflection pulley 13, the detection means 16, the winding reel 18, the drive means 22 and the regulation means 24 according to the first embodiment can be applied to this second embodiment.

According to a third embodiment illustrated in FIG. 3, the detection means 16 comprise means for measuring the winding tension 26 of the metallic monofilament 4 between the regulating device 6 and the winding device 8.

The voltage measurement means 26 can for example be a tensiometer. This embodiment makes it possible to directly measure the winding tension of the metallic monofilament 4. The tension measurement means 26 can supplement the detection means 16 or even replace them.

The regulating means 24 are arranged so as to reduce the speed of rotation of the take-up reel 18 when the take-up tension of the metallic monofilament 4 passes above the

- 14 critical upper winding tension value and arranged so as to increase the rotation speed of the winding reel 18 when the winding tension of the metallic monofilament 4 passes below the critical lower winding tension value.

As in the previous embodiments, in order to maintain a suitable tension throughout the process of winding the monofialment 4, the regulating means 24 are arranged so as to reduce the speed of rotation of the winding reel as long as the indicator exceeds the critical threshold corresponding to the critical upper winding voltage value. In this third embodiment, the regulating means 24 are arranged so as to reduce the speed of rotation of the winding reel 18 as long as the winding tension of the metallic monofilament 4 is above the tension value d '' critical upper winding.

Similarly, the regulating means 24 are arranged so as to increase the speed of rotation of the take-up reel as long as the indicator exceeds the critical threshold corresponding to the value of the critical lower take-up tension. In this third embodiment, the regulating means 24 are arranged so as to increase the speed of rotation of the winding reel 18 as long as the winding tension of the metallic monofilament 4 is below the tension value d '' critical lower winding.

The means for guiding the regulating pulley 12 shown in FIG. 3 are means for guiding in curvilinear translation 28. However, this embodiment may alternatively include means for guiding in rectilinear translation 34.

The regulation means 24 are integrated into the structure of the drive means 22 and are therefore not shown in FIG. 3.

The other characteristics of the regulation pulley 12, the return pulley 13, the winding reel 18, the drive means 22 and the regulation means 24 according to the first and second embodiments 1 and 2 are applicable to this third embodiment.

As illustrated in FIG. 4a, the installation 2 according to any one of the preceding embodiments may comprise several regulation pulleys 12a, 12b, 12c of the tension of the metallic monofilament 4 mounted movable in rotation relative to the frame 10 around d a common axis 14 of rotation of the regulation pulleys 12a, 12b, 12c.

Each regulating pulley 12 is mounted movable in translation relative to the frame 10 in a direction substantially perpendicular to the common axis 14 of rotation of the regulating pulleys 12a, 12b, 12c. Each regulating pulley 12a, 12b, 12c comprises a corresponding roller 11a, 11b, lie. The regulation pulleys are arranged so as to be freely movable in translation relative to the frame 10 under the effects of the tension of the metallic monofilament 4 and the weight of the regulation pulleys 12a, 12b, 12c.

- 15 The multiplication of the regulation pulleys makes it possible to increase the length of the path of the metallic monofilament and to decrease the winding tension applied to the metallic monofilament

4.

The regulation pulleys 12a, 12b, 12c can be movable in rotation independently of each other. Thus, a difference in speed of passage of the metallic monofilament 4 from one pulley to the other will not cause additional mechanical stresses in contact with the regulation pulleys 12a, 12b, 12c, in particular no sliding of the metallic monofilament 4 in contact pulleys which could lead to premature wear of the rollers 13 and improper regulation of the tension of the metallic monofilament 4.

As illustrated in FIG. 4b, the regulating device can also comprise several deflection pulleys 13a, 13b, 13c of the metallic monofilament 4 mounted movable in rotation relative to the frame 10 around a common axis 15 of rotation of the deflection pulleys, each return pulley being fixed in translation relative to the frame. Each return pulley 13a, 13b, 13c comprises a corresponding roller 17a, 17b, 17c.

The return pulleys 13a, 13b, 13c can be movable in rotation independently of each other for the same reasons as for the regulation pulleys 12a, 12b, 12c.

In the previous embodiments, the mass of the pulley or pulleys exerts a force opposite to that of the winding tension. Thus, the mass of the pulley (s) will act on the winding tension. Too high a mass may increase the tension too much.

The mass of the regulation pulley (s) 12 can therefore be less than or equal to 1500 g, preferably 800 g.

The invention also relates to a method for regulating the tension of a metallic monofilament and winding the metallic monofilament 4 by means of an installation for regulating the tension of a metallic monofilament and winding the metallic monofilament including:

- a device for regulating the tension 6 of the metallic monofilament,

a winding device 8 for the metal monofilament arranged downstream of the regulating device in the direction of travel of the metal monofilament, the winding device comprising a winding reel 18 movable in rotation about a winding axis 20 , method in which a critical threshold of an indicator of the winding tension of the metallic monofilament corresponding to a critical upper winding tension value is detected, and in which, when the indicator reaches the critical threshold corresponding to the value critical winding tension, the rotation speed of the winding reel is reduced.

During this method, a critical threshold of an indicator of the winding tension of the metallic monofilament 4 corresponding to a lower critical winding tension value is detected and when the indicator reaches the critical threshold corresponding to the value of critical lower winding voltage, the speed of rotation of the winding reel 18 is increased.

- 16 The speed of rotation of the take-up reel is reduced as long as the indicator exceeds the critical threshold corresponding to the critical upper winding tension value and the speed of rotation of the take-up reel is increased as long as l the indicator exceeds the critical threshold corresponding to the critical lower winding voltage value.

In a method using the installation 2 according to the first and second embodiments, at least one critical position of the regulating pulley 12 corresponding to the critical upper winding tension value is detected and at least one critical position of the regulation pulley 12 corresponding to a critical lower winding tension value.

The speed of rotation of the winding reel 18 is reduced when the regulating pulley 12 reaches the critical position corresponding to the critical upper winding tension value and the speed of rotation of the winding reel 18 is increased when the regulation pulley 12 reaches the critical position corresponding to a critical lower winding tension value.

In order to maintain a suitable winding tension, the speed of rotation of the winding reel 18 is reduced as long as the regulating pulley 12 exceeds the critical position corresponding to the value of the critical upper winding tension and the speed is increased of rotation of the winding reel 18 as long as the regulating pulley 12 exceeds the critical position corresponding to a lower critical winding tension value. Thus, the pulley moves between the two critical positions as a function of the variations in tension of the metallic monofilament 4.

In a method using the installation 2 according to the third embodiment, the winding tension of the metallic monofilament 4 is measured between the regulating device 6 and the winding device 8.

Thus, the speed of rotation of the winding reel 18 is reduced when the winding tension of the metallic monofilament 4 passes above the critical upper winding tension value and the speed of rotation of the reel d is increased. winding 18 when the winding tension of the metallic monofilament 4 drops below a lower critical winding tension value.

In order to maintain a suitable winding tension, the speed of rotation of the winding reel 18 is reduced as long as the winding tension of the metallic monofilament 4 is above the critical upper winding tension value and increases the speed of rotation of the winding reel 18 as long as the winding tension of the metallic monofilament 4 is below the critical lower winding tension value.

The metallic monofilament 4 used in the various embodiments described above has a diameter ranging from 0.05 m to 0.50 mm, preferably from 0.10 mm to 0.45 mm, more preferably from 0.25 mm to 0.45 mm and even more preferably from 0.28 mm to 0.40 mm. Here,

- 17 d = 0.32 mm. In order to avoid introducing an intolerable hanger into such a metallic monofilament, the value of the critical upper winding tension is less than or equal to 1000 g, preferably to 800 g, more preferably to 600 g and even more preferably to 500 g and the value of critical lower winding tension is greater than or equal to 150 g, preferably 200 g, more preferably 300 g.

The invention has been described above with the help of embodiments without limitation of the general inventive concept.

Many other modifications and variations suggest themselves to those skilled in the art, after reflecting on the various embodiments illustrated in this application. These embodiments are given by way of example and are not intended to limit the scope of the invention, which is determined exclusively by the claims below.

In the claims, the word "comprising" does not exclude other elements or steps, and the use of the indefinite article "one" or "one" does not exclude plurality. The mere fact that different features are listed in mutually dependent claims does not indicate that a combination of these features cannot be used to advantage. Finally, any reference numeral used in the claims should not be interpreted as limiting the scope of the invention.

Claims (35)

1. Installation (2) for regulating the tension of a metallic monofilament (4) and for winding the metallic monofilament (4) comprising: - a device for regulating (6) the tension of the metallic monofilament, - a winding device (8) of the metallic monofilament arranged downstream of the regulating device in the direction of travel of the metallic monofilament, the regulating device (6) comprising: a frame (10), at least one regulating pulley ( 12) of the tension of the metallic monofilament (4) mounted movable in rotation relative to the frame (10) about an axis of rotation (14) of the regulating pulley, the regulating pulley (12) being mounted movable in translation relative to the frame (10) in a direction substantially perpendicular to the axis of rotation (14) of the regulating pulley, the regulating pulley (12) being arranged so as to be freely movable in translation relative to the frame (10 ) under the effects of the tension of the metallic monofilament (4) and the weight of the regulating pulley, detection means (16) of at least a critical threshold of an indicator of the winding tension of the metallic monofilament ( 4) corresponding to a winding tension value critical upper age, the winding device (8) comprising: a winding reel (18) movable in rotation about a winding axis (20), drive means (22) in rotation of the winding reel (18) around the winding axis (20), the installation (2) comprising regulation means (24) drive means (22) connected to the drive means (22) and to the detection means (16) so as to reduce the speed of rotation of the winding reel (18) when the indicator reaches the critical threshold corresponding to the critical upper winding tension value. 2. Installation (2) according to the preceding claim, wherein the regulating means (24) are arranged so that the critical upper winding tension value is less than or equal to 1000 g, preferably 800 g, more preferably at 600 g and even more preferably 500 g. 3. Installation (2) according to any one of the preceding claims, comprising detection means (16) of at least one critical threshold of an indicator of the winding tension of the metallic monofilament ( 4) corresponding to a critical lower winding tension value. - 19 4. Installation (2) according to the preceding claim, in which the regulation means (24) of the drive means (22) are connected to the drive means and to the detection means (16) so as to increase the winding spindle rotation speed when the indicator reaches the critical threshold corresponding to the critical lower winding tension value. 5. Installation (2) according to the preceding claim, wherein the regulation means (24) are arranged so that the critical lower winding tension value is greater than or equal to 150 g, preferably 200 g, more preferably at 300 g. 6. Installation (2) according to any one of the preceding claims, in which the detection means (16) comprise means for measuring the tension (26) of winding of the metallic monofilament (4) between the regulating device ( 6) and the winding device (8). 7. Installation (2) according to the preceding claim, wherein the regulating means (24) are arranged so as to reduce the speed of rotation of the winding reel (18) when the winding tension of the metal monofilament (4 ) goes above the critical upper winding tension value. 8. Installation (2) according to claims 6 or 7, wherein the regulating means (24) are arranged so as to increase the speed of rotation of the winding reel (18) when the winding tension of the metal monofilament (4) goes below the critical lower winding tension value. 9. Installation (2) according to any one of the preceding claims, in which the detection means (16) comprise means for detecting at least one critical position of the regulation pulley (12) corresponding to the tension value critical upper winding. 10. Installation (2) according to the preceding claim, wherein the regulating means (24) are arranged so as to reduce the speed of rotation of the winding reel (18) when the regulating pulley (12) reaches the position. critical corresponding to the critical upper winding tension value. 11. Installation (2) according to any one of the preceding claims, in which the detection means (16) comprise means for detecting at least one critical position of the regulation pulley ( 12) corresponding to a critical lower winding tension value. -20 12. Installation (2) according to the preceding claim, wherein the regulating means (24) are arranged so as to increase the speed of rotation of the winding reel (18) when the regulating pulley (12) reaches the critical position corresponding to a critical lower winding tension value. 13. Installation (2) according to any one of claims 1 to 12, in which the regulation device (6) comprises means for guiding in curvilinear translation (28) of the regulation pulley (12) relative to the frame ( 10), preferably means for guiding in circular translation (28) the regulation pulley with respect to the frame (10). 14. Installation (2) according to the preceding claim, in which the means for guiding in curvilinear translation (28) comprise a lever (30) carrying the regulating pulley (12), the regulating pulley (12) being mounted movable in rotation. relative to the lever (30), the lever (30) being mounted movable in rotation relative to the frame (10) about an axis of rotation (32) of the lever (30). 15. Installation (2) according to any one of claims 1 to 12, in which the regulation device (6) comprises means for guiding in rectilinear translation (34) of the regulation pulley (12) relative to the frame ( 10). 16. Installation (2) according to the preceding claim, wherein the guide means in rectilinear translation (34) comprise a guide slide (36) of the regulating pulley (12), the axis of the regulating pulley being mounted. movable in translation in the guide slide (36). 17. Installation (2) according to any one of the preceding claims, in which the regulating device (6) comprises several regulating pulleys (12a, 12b, 12c) of the tension of the metallic monofdament (4) mounted movable in rotation by relative to the frame (10) around a common axis of rotation (14) of the regulating pulleys, each regulating pulley (12) being mounted movable in translation relative to the frame (10) in a direction substantially perpendicular to the axis common rotation (14) of the regulation pulleys (12a, 12b, 12c), the regulation pulleys being arranged so as to be freely movable in translation relative to the frame (10) under the effects of the tension of the metallic monofilament (4 ) and the weight of the regulation pulleys (12a, 12b, 12c). 18. Installation (2) according to the preceding claim, wherein the regulation pulleys (12a, 12b, 12c) are movable in rotation independently of each other. 19. Installation (2) according to any one of the preceding claims, in which the regulating device (6) comprises at least one return pulley (13) of the metallic monofilament -21 (4) rotatably mounted relative to the frame (10) about an axis of rotation (15) of the idler pulley, the idler pulley (13) being fixed in translation relative to the frame (10) . 20. Installation (2) according to the preceding claim, wherein the regulating device (6) comprises several deflection pulleys (13a, 13b, 13c), of the metallic monofilament (4) mounted movable in rotation relative to the frame 10 around d 'a common axis of rotation (15) of the return pulleys, each return pulley (13) being fixed in translation relative to the frame (10). 21. Installation (2) according to the preceding claim, wherein the return pulleys (13a, 13b, 13c) are movable in rotation independently of each other. 22. Installation (2) according to any one of the preceding claims, in which the mass of the regulation pulley or pulleys (12) is less than or equal to 1500 g, preferably 800 g. 23. Installation (2) according to any one of the preceding claims, in which the or each regulating pulley (12) comprises a monolithic pulley roller (17) made of a material having a density less than or equal to 7 g. cm-3, preferably 2 g.cm-3. 24. Installation (2) according to any one of the preceding claims, in which the roller (17) of the or each regulating pulley (12) is made of a polymeric material. 25. Method for regulating the tension of a metallic monofilament (4) and winding the metallic monofilament (4) by means of an installation (2) for regulating the tension of a metallic monofilament (4) and d winding of the metallic monofilament (4) comprising: - a device for regulating (6) the tension of the metallic monofilament (4), - a winding device (8) of the metal monofilament (4) arranged downstream of the regulating device (6) in the direction of travel of the metal monofilament (4), the winding device (8) comprising a reel of winding (18) movable in rotation about a winding axis (20), method in which a critical threshold of an indicator of the winding tension of the metallic monofilament (4) corresponding to a tension value d is detected 'critical upper winding, and in which, when the indicator reaches the critical threshold corresponding to the value of critical upper winding voltage, the speed of rotation of the winding reel (18) is reduced. 26. Method according to the preceding claim, in which a critical threshold of an indicator of the winding tension of the metallic monofilament (4) corresponding to a lower critical winding tension value is detected. -22 27. The method as claimed in the preceding claim, in which when the indicator reaches the critical threshold corresponding to the critical lower winding tension value, the speed of rotation of the winding reel (18) is increased. 28. Method according to any one of claims 25 to 27, in which the winding tension of the metallic monofilament (4) is measured between the regulating device (6) and the winding device (8). 29. Method according to the preceding claim, in which the speed of rotation of the winding reel (18) is reduced when the winding tension of the metallic monofilament (4) passes above the upper winding tension value. critical. 30. The method of claim 28 or 29, wherein the rotational speed of the take-up reel (18) is increased when the take-up tension of the metallic monofilament (4) drops below a tension value d '' critical lower winding. 31. Method according to any one of claims 25 to 30, in which at least one critical position of the regulating pulley (12) is detected corresponding to the value of critical upper winding tension. 32. The method as claimed in the preceding claim, in which the speed of rotation of the winding reel (18) is reduced when the regulating pulley (12) reaches the critical position corresponding to the critical upper winding tension value. 33. Method according to any one of claims 25 to 32, in which at least one critical position of the regulating pulley (12) is detected corresponding to a critical lower winding tension value. 34. Method according to the preceding claim, in which the speed of rotation of the winding reel (18) is increased when the regulating pulley (12) reaches the critical position corresponding to a critical lower winding tension value. 35. Method according to any one of claims 25 to 34, in which the metallic monofdament (4) has a diameter ranging from 0.05 m to 0.50 mm, preferably from 0.10 mm to 0.45 mm, more preferably from 0.25 mm to 0.45 mm and even more preferably from 0.28 mm to 0.40 mm. 1/2