EP1893515B1 - Winder with monitored secondary travel - Google Patents

Description

The present invention relates to a device for ensuring the drawing and winding of thermoplastic son, especially glass.

It is recalled that the manufacture of reinforcing glass son results from a complex industrial process which consists of obtaining threads from threads of molten glass flowing through the orifices of dies. These nets are drawn as continuous filaments, and then these filaments are gathered together in locks, which are then collected in the form of windings.

Within the meaning of the invention, the windings are in the form of coils, or more precisely still in the form of "cakes", these cakes being intended more particularly for applications related to reinforcement.

The cake form is made using winders, which as their name suggests, are responsible for winding at very high speed (about 10 to 50 meters per second) the glass son that were previously sized .

These winders provide the drawing and the winding of these filaments and the operating parameters of these winders condition with those of the die the dimensional characteristics of the yarn, in particular the title expressed in tex (the tex being the weight in grams of 1000 meters fiber or yarn).

Thus, in order to guarantee a constant yarn count during the whole of the cake preparation phase despite the increase in its diameter, the speed of the winder winding member is enslaved so as to ensure a linear winding speed of the winder. constant wire although its angular velocity varies, this speed control being achieved by reducing the speed of rotation of the spindle which supports the cake as a function of the increase in its diameter.

Another important parameter which determines the obtaining of a cake of optimal quality consists in its ability to be easily unrolled, without the presence of loops, parasitic nodes, with limitation of friction. This ability to unwind is determined by the nature of the construction law (which determines the magnification of the cake) that has been generated by the winder during cake formation. This law of construction incorporates many parameters, one of the most important is the crosstalk report, often called RC and the title of the wire.

To print a given crisscross ratio to a cake, the winders of the prior art, which essentially consist of a frame generally positioned below a die, this frame supporting the creasing device and at least one movable spindle in rotation, this pin being adapted on the one hand, to generate the cake and on the other hand, to support the latter, generate a kinematics or a particular race to the wire from the combination of two movements: a first movement that prints a primary race to the wire and a second movement that prints a secondary race to the wire, the first and second movements are generally applied by a single body with combined movement which is more generally known as the device of encroisure which is conventionally a propeller or any other equivalent device such as in particular a helical grooved wheel, which can describe all or part of the length cake.

• d'un axe rotatif motorisé sur lequel est monté le dispositif d'encroisure proprement dit, qui assure le premier mouvement de va-et-vient de la mèche, appelé mouvement primaire ou C1, par un contact périphérique entre le dispositif d'encroisure et les fils, de manière à faire glisser les fils d'un coté à l'autre de ce dernier dans un mouvement rapide,
• d'un élément mobile qui supporte l'ensemble et qui suit le deuxième mouvement lent de va et vient de la mèche, appelé mouvement secondaire ou C2.

The crease device thus ensures the axial distribution of the yarns along several cakes by the combination of two reciprocating movements parallel to the axis of the spindle, this subset generally consisting mainly of:

• a motorized rotary axis on which is mounted the actual encroissance device, which provides the first movement back and forth of the wick, called primary movement or C1, by a peripheral contact between the crimping device and the wires, so as to slide the wires from one side to the other of the latter in a fast movement,
• a movable element that supports the assembly and follows the second slow movement back and forth of the wick, called secondary movement or C2.

According to this embodiment, the strands of threads are movable with the crimping device and the spindle supporting the cake is fixed in translation and mobile in rotation.

As an alternative to the previous system, the secondary stroke C2 is obtained by an axial translation of the spindle supporting the cake. According to this second embodiment, the thread locks and the creasing device are stationary along the axis of horizontal translation (but rotatable) and the spindle supporting the cake is movable in translation and rotation.

These two winding principles have the particularity of generating generally cylindrical coils conical flanks called "cakes" whose length is a function of the primary and secondary strokes imposed on the wick; these cakes being intended to be used in the process of transformation to be unwound from the outside (in the opposite direction of the winding) to be then rewound or worked in another form.

However, the unwinding of such a cake can be problematic. It is indeed difficult to manage the reeling of a reel and its behavior as such, because then intervene several parameters such as the size that covers the fiber or the fiberization tension of the latter, even if their The influence is great these parameters are both often imposed by the process or the final use of the product and it is very difficult to modify them.

A first solution to take into account these unwinding problems is to change the crest ratio is the ratio between the winding speed and the speed of flapping of the primary motion.

By modifying the value of this parameter, it is possible to modify the winding angle of the wires on the coil, which has the effect of acting directly on the arrangement of the turns, we can thus modulate this parameter to obtain the better compromise of quality of reel hold necessary during the various manipulations of the method of manufacture and quality of reeling of the wire which is essential to its use during the various process of transformation of the wire.

Nevertheless, the evolution of products tending to obtain increasingly large coils, with new types of sizing and speeds of winding more and more fast, the only adjustment of the ratio of cruising makes difficult the optimization to the best compromise of the quality criteria that are the holding of the coil and its unwinding.

In addition, given this new constraint (obtaining increasingly large coils), there is then the problem of drying them. Indeed, drying cakes after winding is an important and delicate part of the process because it seeks to evacuate a maximum of moisture in a minimum of time and this without degradation of products, for this it is necessary to allow water trapped at heart of the winding to evacuate easily arranging the turns so as to create evacuation channels that will allow better ventilation of the winding.

This particular arrangement of turns allowing this "porosity" of the cakes is obtained with a limited number of crosstalk ratios, which also limits the possibilities of optimizing this ratio to obtain a good performance of the cakes.

More generally still, it is not enough to produce increasingly large cakes, which can be dried and unwound optimally, it is moreover appropriate that these cakes have a better filling. To improve the profitability of each winding it is indeed desirable to increase their filling space equivalent (length and inner and outer diameters) while ensuring their good performance, the only way would be to have a coil with flanks oriented substantially perpendicular to the axis of the coil. However, to obtain such a result, this would imply a very small primary stroke that is not compatible with the holding of the winding.

US-A-5,156,347 describes a device according to the preamble of claim 1.

The present invention therefore aims to take the aforementioned problems by proposing improvements made to the creasing device.

For this purpose, the winder according to the invention is according to claim 1.

By means of this control device, an adjustment parameter is introduced which makes it possible to optimally control the kinematics of the second reciprocating movement of the creasing device during the winding of the cake.

In preferred embodiments of the invention, one and / or other of the arrangements according to the dependent claims may also be used.

Other features and advantages of the invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings.

• La figure 1 est une vue de face d'un bobinoir selon l'invention,
• La figure 2 est une vue de côté du bobinoir illustrant les mouvements de va-et-vient des courses primaire et secondaire
• La figure 3 est une vue de côté du bobinoir illustrant les mouvements de va-et-vient de course primaire et secondaire selon une variante de réalisation,
• Les figures 4a et 4b illustrent des profils de gâteau obtenu par un bobinoir selon l'art antérieur,
• Les figures 5a et 5b illustrent des profils de gâteau obtenu par un bobinoir selon l'invention.

On the drawings:

• The figure 1 is a front view of a winder according to the invention,
• The figure 2 is a side view of the winder illustrating the back-and-forth movements of the primary and secondary races
• The figure 3 is a side view of the winder illustrating the movements of back and forth primary and secondary race according to an alternative embodiment,
• The Figures 4a and 4b illustrate cake profiles obtained by a winder according to the prior art,
• The Figures 5a and 5b illustrate cake profiles obtained by a winder according to the invention.

According to a preferred embodiment of a winder 1 according to the invention illustrated in figure 1 , it comprises a metal frame 2 obtained by a technique of mechanically welded metal elements previously machined or available as standard commercially. This frame 2 essentially comprises a substantially rectangular base 3 resting on legs judiciously placed so as to correspond to the jig or the spacing of the forks of a pallet truck or a similar handling device to facilitate the implementation of this winder in a fibering position.

On this base is assembled a closed structure 4 partly covered, which is intended to receive all the components necessary for the operation of the winder 1. As such, and in a nonlimiting manner, this closed structure shaped cabinet is provided with control devices and of control necessary for the various regulations of the various components which will be described later in this description, of networks, hydraulic, electrical, compressed air, and other fluids necessary for the operation of said organs

On the closed structure 4 cooperates a cylinder 5 which protrudes laterally. This cylinder 5 is rotatably mounted about an axis of rotation (called the third axis of rotation) and is held within one of the walls of the closed structure by means of a plurality of guide members ( ball crown, ball slide for example). It is also planned to motorize this barrel 5 so that it can describe and index a plurality of angular positions relative to the frame 2, during the winding of the cakes.

Indeed, this barrel 5 constitutes a pin support assembly. On the figure 1 it is noted that the barrel 5 has two pins 6, 7, in diametrically opposite positions (one could conceive a barrel having only one pin [if there is only one pin, it does not there is no need barrel but it is not possible to do the automatic restart] or on the contrary a barrel with at least three, four pins or more, depending on the size available and the capabilities of the die positioned in upstream). Within the winder, the barrel 5 makes it possible to bring a spindle previously unloaded and provided with at least one blank sleeve (within the meaning of the invention, a sleeve is a support made of plastic or cardboard which is intended to receive winding yarn or cake) in the winding position and another spindle having its full cuffs unloading position by rotations of 180 ° (if the barrel has two pins, as shown in the examples).

Thanks to the motorization of the cylinder 5 and a regulation of its position and / or its angular velocity, for example by means of a servocontrol of the number of revolutions of the geared motor unit driving the cylinder, this motorcycle gearbox being engaged for example with the barrel 5 at its motor shaft by a connection of the gear type, it becomes possible to position the active spindle substantially in line with the wire and it moves back or away from its position angle of origin during the enlargement of the cake so as to maintain a fixed geometry.

Each of the pins 6, 7 integral with the barrel 5 constitutes a rotating assembly adapted to wind the wire on a sleeve previously introduced on the sleeve or the pin nose. This winding is carried out according to a first axis of rotation substantially parallel to the axis of rotation of the barrel 5 relative to the structure of the frame 2. In addition to a rotational movement caused by a rotor motor integrated in the spindle around this first axis , the spindle can be adapted to be able to perform a back-and-forth stroke parallel to the first axis of rotation (secondary stroke movement C2), in the opposite case, it is the crease system that will be of the same way (secondary stroke movement C2). This movement back and forth is caused by a motorized actuator linear movement (ball screw for example) secured on the one hand, the cylinder or the frame and on the other hand, the body of the spindle.

In the figure, there appears another element that is essential for the making of a cake. This is the wire crook device 8 on pin 6 or 7. In this example, it is a helix. This propeller is rotated by a motor member about a shaft coaxial with a second axis substantially parallel to those previously mentioned. The rotational speed of the drive member of the propeller is regulated according to the law of construction of the cake, and it is expected that these control and control devices are integrated within the structure 2 forming frame.

Of course, if it is desired to make several cakes simultaneously on the same spindle 6 or 7, the number of propellers 8 will be adapted accordingly, and the propeller support shaft will comprise a propeller train, the number of which will be equal to the number of cakes that you want.

The rotational movement of the helix is translated at the wire by a movement of oscillations or beats whose amplitude and frequency are adjustable according to the values of the desired crest ratio. The frequency is determined according to the speed of rotation and the amplitude is a function of the geometry of the helix.

Other devices not shown on the figure 1 can be considered as a substitute for the propeller. It may be a wheel provided with at least one groove, this groove being adapted to position and guide at least one wire, said wheel being rotatable about a second axis substantially parallel to the first axis.

Whatever the embodiment of the crimping device 8, it performs a so-called primary stroke movement or C1 and operates in speed regulation and possibly position with the back and forth of the pin 6 or 7 which constitutes the so-called secondary travel movement C2, according to the embodiment variant illustrated in FIG. figure 3 , moving spindle 6 or 7 in a reciprocating motion in a direction parallel to its axis of rotation being performed by an actuator M2 meshing with a kinematic chain with the shaft spindle support.

According to another variant embodiment illustrated in figure 2 , the crisscrossing device 8 is mounted on a motorized rotary axis by means of a motor M1, which provides the first reciprocating movement of the wick, called the primary movement or C1. This assembly cooperates by means of a kinematic chain 14 of the screw-nut or similar type set in motion by means of an actuator M2 (engine for example) making it possible to print to this assembly a translation movement along an axis substantially parallel to the axis of rotation of the crimping device so as to give the latter an additional back and forth movement called secondary movement or C2.

Whatever the embodiment variant illustrated in figure 2 or in figure 3 , it is noted that the actuator M2 is provided with an additional control member 12 of the servomotor type servo-controlled position and / or speed for continuously controlling the movement kinematics (speed and / or position) of the actuator responsible for printing the C2 secondary back-and-forth movement.

According to an advantage of the invention, the primary and secondary strokes of the winder 1 are decoupled with the aid of the control member 12. This additional control member 12 offers possibilities for adjusting and optimizing the arrangement of the turns that can solve the problems of holding cakes at a given crosstalk ratio meeting a need for unwinding or a need for drying. The variations of this control member may also make it possible to increase the amount of son deposited at the ends of the cakes in order to promote their filling.

Other subassemblies necessary for the operation of the winder 1 are integrated within the frame 2. Thus, at the base 3 of the frame 2 is positioned a pull-wire 9. A pull-thread 9 is a set of wire drive which is used during the restart, the restart being a transitional phase prior to a winding phase. To this end, the wire is drawn by a motorized roller train with smooth walls or with reliefs (the wires are brought to operating conditions that are compatible with the setting of the wires in the spindle nose when starting the winding phase ).

The winder comprises at least one rotary ejector 10 and at least one right ejector 11, these project laterally with respect to the closed structure 2 and in line with the cylinder 5.

The rotary ejector 10 or the retraction device is constituted by an articulated arm at one of its ends at the closed structure of the frame 2, its free end is adapted to grip and move the wires between a first position in wherein the yarns are engaged with the crimping device 8 of the wire (the helix for example) and a second position in which the wires are retracted with respect to said crimping device 8. The angular movement of the rotary ejector 10 is performed during the change of spindle 6 or 7 (pivoting 180 ° of the barrel 5).

The right ejector 11 is as its name suggests a substantially straight arm. Projecting laterally as the rotary ejector 10 with respect to a side wall of the closed structure of the frame 2, it can occupy two positions: a rest position in which it is set back from the path of the wire, and a working position in which it holds the wire above the pin nose 6 or 7 when raising. This working position is also occupied during a transfer operation (rotation of the barrel, and passage of a pin with wrapped cakes, to a pin with empty cuffs).

In the vicinity of the crimping device wire 8 (helix for example) is positioned a cleaning member (not visible in the figures) of said positioning device by spraying a fluid under pressure.

As winding progresses (of the increase in the thickness of threads at the level of the cakes), the barrel 5 makes an angular correction by rotation and indexing of its angular position around its axis so as to move the spindle away. active "- that where the winding of the device - the periphery of the device for positioning and guiding the wire, so as to maintain a fixed geometry.

The winding is active, the movements of primary stroke and secondary stroke are controlled by the steering device 12 to comply with the law of construction.

As can be seen at the level of Figures 4a and 4b , the cake obtained by winding a bit of yarns using a winder of the prior art evolves during its construction in the following manner: the angle α which is the winding angle ( developed angle such that: tang α = V _bat / V _wire ) passes to a value α ', which is lower. During this winding, the speed of the secondary stroke remained constant at a value V2 as well as the crest ratio K. (the crest ratio K being defined as the ratio of the speed of the spindle to the speed of the crease device V _bat ).

Remember that to keep a constant title during a winding it is necessary to maintain a constant drawing speed (V _thread ), so we necessarily have the speed of the spindle which decreases (because of the increase in diameter) and since K is constant, the speed V crosswinding device _beats should decrease in the same proportion. As V _bat decreases and V _wire necessarily α is smaller and is equal to α '.

Now let us study the winding of a cake using a winder according to the invention, that is to say provided with the piloting device 12 of the secondary stroke movement C2. We can therefore have K variable and V2 variable.

As can be seen at the level of Figures 5a and 5b which show the evolution of the construction of the cake during the winding, the angles α 'and α "are different: in the example α is closer to α' than to α", and it is possible to accumulate or wind the yarn on the sides of the cake (above the dotted line, comparison between figure 4b and 5b ). In order to be able to vary the speed and / or the position of the secondary stroke C2 during the winding, the control device is controlled by a PLC and software "adhoc" which determines at all times the actions on the servomotor acting on the C2 race.

Claims (10)

1. Winder (1) comprising a frame (2), this frame having at least one spindle (6, 7) designed to support at least one cake (13), said spindle (6, 7) being able to rotate about a first axis approximately perpendicular to the diameter of the cake, and at least one crosswinding device (8) designed to deposit at least one strand on the spindle (6, 7) with a first traversing movement (C1), the strand being furthermore deposited on the spindle (6, 7) by a follower with a second traversing movement (C2), the follower including a control device (12) for controlling the second traversing movement, the control device (12) comprising a servomotor for at least continuously controlling at least one of the kinematic quantities of the second traversing movement (C2), characterized in that the control device is controlled by a programmable controller and software that determines at any moment the actions on the servomotor acting on the secondary travel (C2), the programs being designed so that the ratio K of the speed of the spindle to the speed of the crosswinding device (V_cross) is variable and so that the speed V2 of the secondary travel is variable, such that the wind angle developed following the increase in the diameter of the cake (α") is different from the angle (α') which would have been obtained if the ratio K was constant and the speed V2 constant, such that it is possible to accumulate or wind more strand on the ends of the cake.
2. Winder according to Claim 1, characterized in that the follower cooperates with the crosswinding device (8).
3. Winder according to Claim 1, characterized in that the follower cooperates with the spindle (6, 7).
4. Winder according to one of the preceding claims, characterized in that the crosswinding device (8) comprises at least one helical unit mounted so as to be able to rotate about a second axis approximately parallel to the first axis.
5. Winder according to one of Claims 1 to 3, characterized in that the crosswinding device comprises at least one wheel provided with at least one groove, this groove being designed to position and guide at least one strand, said wheel being able to rotate about a second axis approximately parallel to the first axis.
6. Winder according to one of the preceding claims, characterized in that the spindle is fixed to a barrel, said barrel being mounted so as to be able to rotate with respect to the frame about a third rotation axis approximately parallel to said first and second axes.
7. Winder according to Claim 6, characterized in that the barrel has at least two spindles positioned approximately in positions uniformly distributed along the third rotation axis.
8. Winder according to one of the preceding claims, characterized in that the spindle is rotated by means of a kinematic chain which includes a motor integrated into said spindle.
9. Winder according to one of the preceding claims, characterized in that the helical unit/units and its/their drive motor(s) are fastened to a linear actuator, said actuator being designed to provide the traversing movement of said helical unit/units.
10. Winder according to one of Claims 1 or 6 to 8, characterized in that the spindle and its drive motor are fastened to a linear actuator, said actuator being designed to provide the traversing movement of said spindle.

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