EP0000853A1 - Winding machine, in particular for thermoplastic yarns - Google Patents

Abstract

This winder comprises a spindle 2 receiving the wire E to be wound and an oscillating assembly 6, 8, 10 carrying a wire guide 10 and a probe 14. The latter is in contact with the winding and controls an excitation element (valve 20 ) with continuous operation and acting on a motor device (jack 27) actuating the oscillating assembly. Thus, the latter gradually moves away and by a continuous movement of the spindle 2 as a function of the growth of the coil. The probe 14 is balanced around an axis of oscillation Z-Z so as to exert only minimal force on the coil. Application to the winding of wires made up of filaments coming out of a glass products sector.

Description

The present invention relates, in general, to the technique of winding yarns and it relates, more particularly, to winders intended for winding yarns of thermoplastic material such as glass yarns drawn from a pathway.

It is known that when forming spools of threads and in particular glass threads, it is essential that the outer surface of the spool be as homogeneous as possible and that, in particular, the wound thread does not overflow, even in a slight measurement of the lateral sides of the spool, in order to prevent damage to the wire during subsequent handling of the spool.

To manufacture cylindrical coils, winders have already been developed in which a yarn guide in the form of a fork is provided in which the wire to be wound passes, the latter possibly originating in particular from a die. The thread guide is placed as close as possible to the winding intended to form the reel and moved back and forth in a direction which, for reels of cylindrical shape, is parallel to the axis of the spindle around which the coil is formed. The amplitude of the back-and-forth movement corresponds approximately to the height of the coil produced, that is to say to the length of the generator thereof.

During the formation of the coil, its radius increases progressively and it is therefore necessary to move the wire guide, and the assembly on which it is mounted mobile, away from the axis of the spindle, to preserve the same relative position of the wire guide and the outer surface of the reel being formed.

Winders of this type have already been described in the following documents: USP ^3,367,587 _, ^{3,371,877, 3 4} 9 ⁸ 55 ^0, 3,547,361, 3,717,311, 3,887,021, 3,801,032, 3,819,122, 3,838,827 and 3,845,912.

Among these patents, there may be mentioned as the most representative document of the prior art, USP 3,547,361 in which there is a description of a winder comprising a fixed frame in which a spindle intended to receive the wire is rotatably mounted. to roll up. This spindle is coupled to rotational drive means which also act on a wire guide assembly in order to drive the wire guide in a reciprocating movement, the assembly being mounted oscillating in the frame. The winder further comprises a control device intended to cause the rotation of the thread guide assembly in the direction of the distance from the spindle, as a function of the growth of the radius of the spool during formation. This control device comprises an adjustment loop formed by a probe intended to detect the growth of the coil, a motor device intended to rotate the arm and an excitation element of the motor device according to the position of the probe.

The probe is made in the form of a roller coming into contact with the coil, while the wire guide is placed immediately above the roller. The wire passes through the wire guide and then under the roller it leaves to wind up on the spool.

The roller which is fixed on the swinging arm is returned to the coil by an elastic device produced in the form of several pneumatic cylinders. The swinging arm can, in its recoil movement under the effect of the magnification of the coil, activate an electrical contact or proximity sensor which constitutes the excitation element and which acts when it is closed on the motor device to make move the swing arm back.

The disadvantage of the winder according to USP 3,547,361 in particular is the discontinuous nature of the movement away from the swing arm, since the latter can only move in increments which cannot, in practice, be as small as one might wish.

The effect of the increments of movement of the swinging arm, which also affects the wire guide, is to produce periodically variable conditions of winding. This results depending on the case, in particular that the distance between the wire guide and the spool may be constant and especially that the probe cannot exert constant pressure on the coil.

• - la distance entre le guide-fil et le rouleau palpeur est un facteur qui conditionne la précision sur la hauteur de la bobine (longueur de sa génératrice). Si celle-ci n'est pas rigoureusement constante, les flancs de la bobine sont irréguliers et on y voit des cannelures concentriques qui sont constituées de spires de fil plus ou moins sorties hors du corps de la bobine.Il s'ensuit une possibilité d'érosion de oelles=ci lors des manipulations ultérieures en ces points précis,
• - si le rouleau palpeur exerce une pression irrégulière sur la bobine, la dégradation du fil suit ces variations de pression. Il en résulte que la qualité du fil bobiné n'est pas constante,
• - le manque de fidélité couramment reconnu dans le-seuil de déclenchement du contact électrique formant l'élément d'excitation peut produire des incréments de mouvement sur le bras oscillant irréguliers et relativement grands, ce qui se traduit sur la bobine par de légères variations dans la longueur bobinée et il en résulte également un défaut de régularité des flancs de la bobine. Si l'élément d'excitation est constitué par un micro-contact électrique, l'organe palpeur doit de plus vaincre l'effort parasite d'actionnement de ce contact. Ceci a pour effet de perturber l'effort d'application du rouleau sur le fil de la bobine, ce qui accentue encore les détériorations de ce dernier.Le caractère discontinu de ces efforts et du mouvement a pour conséquence que la bobine obtenue n'a pas une qualité régulière puisqu'à certains moments, le fil ne subit qu'un contact très faible,
• - pour que le rouleau palpeur puisse agir sur l'élément d'excitation formé par le microcontact électrique, il est nécessaire, étant donné que ce rouleau palpeur fait partie d'un équipage monté oscillant sur le bras qui est lui-même oscillant et qui porte le guide-fil et le microcontact, que la surface de la bobine exerce une force relativement grande sur ce palpeur de l'ordre de 4 à 5 newtons par exemple, dans le cas du USP 3 547 361. Pour réduire cet effort, on a prévu dans ce brevet un système de vérins montés entre l'équipage mobile du palpeur et le bras oseillant.Cependant, ce système est relativement compliqué et en tout cas très difficile à régler en raison des efforts parasites dûs aux frottements internes des vérins.

At first glance, this effect seems negligible but in practice, especially if it is a question of winding glass strands, the, Appelesee noted that the coils obtained have various defects due to the following imperfections:

• - the distance between the wire guide and the feeler roller is a factor which determines the precision on the height of the spool (length of its generator). If the latter is not strictly constant, the sides of the coil are irregular and there are concentric grooves which consist of turns of wire more or less exited from the body of the coil. 'erosion of oelles = ci during subsequent manipulations at these precise points,
• - if the feeler roller exerts an irregular pressure on the spool, the degradation of the wire follows these pressure variations. As a result, the quality of the wound wire is not constant,
• - the lack of fidelity commonly recognized in the tripping threshold of the electrical contact forming the excitation element can produce increments of movement on the oscillating arm which are irregular and relatively large, which results on the coil by slight variations in the length wound and this also results in a defect in the regularity of the sides of the reel. If the excitation element is constituted by an electrical micro-contact, the feeler member must moreover overcome the parasitic force of actuation of this contact. This has the effect of disturbing the force applied by the roller to the coil thread, which further accentuates the deterioration of the latter. The discontinuous nature of these forces and of the movement has the consequence that the coil obtained has no not a regular quality since at certain times, the wire undergoes only a very weak contact,
• - in order for the feeler roller to act on the excitation element formed by the electrical microswitch, it is necessary, given that this feeler roller is part of an assembly mounted oscillating on the arm which is itself oscillating and which carries the wire guide and the microswitch, that the surface of the coil exerts a relatively large force on this probe of the order of 4 to 5 newtons for example, in the case of USP 3,547,361. To reduce this effort, we has provided in this patent a system of jacks mounted between the moving element of the probe and the daring arm. However, this system is relatively complicated and in any case very difficult to adjust due to the forces pa rasites due to internal friction of the cylinders.

The object of the invention is to provide a winder of the above-mentioned type, but devoid of the drawbacks which have just been mentioned.

It therefore relates to a winding machine, in particular for wires of thermoplastic material such as glass wires drawn from a die, characterized in that its excitation element is an element with continuous control.

Thanks to this characteristic, it becomes possible to form, for the control of the recoil movement of the thread guide, a supply loop, the input variable of which, as in the prior art, does not involve a relatively minimal effort. high exerted by the coil on the probe, but a displacement, in other words the simple increase in the radius of the coil during formation. Thus, the whole of the swinging arm and all the elements which it carries move away from the axis of the spindle carrying the reel being formed, by a rigorously continuous movement which is directly slaved to the magnification of the radius of the reel , the displacement signal generated by the feeler roller being processed in the servo loop and transformed only then into an effort necessary to move the entire swing arm away from the axis of the spindle.

According to another important characteristic of the invention, the assembly constituted by the feeler roller and its support is balanced by simple gravity and associated with a simple device making it possible to rigorously adjust the pressure exerted by the feeler roller on the outer surface of the coil.

Thanks to this characteristic, it is possible to significantly reduce the pressure exerted by the feeler roller on the spool, which practically avoids any deterioration of the wire. In addition, it is possible to increase the inertia of the oscillating assembly formed by the feeler. , which avoids bouncing of the latter and thus making the input signal of the servo loop regular. Thus, the movement of the swinging arm can be as regular as possible, which contributes to a rigorous regularity of the sides of the coil.

Other characteristics of the invention will appear in the course of the description which follows.

• - la fig. 1 est une vue schématique en perspective de l'ensemble d'un bobinoir réalisé selon l'invention;
• - les fig. 2 et 3 sont des vues en coupe partielles représentant la configuration de certains organes du bobinoir respectivement en début du bobinage et un certain temps après ce début;
• - la fig. 4 montre une vue en coupe, à grande échelle, de la suspension du rouleau palpeur;
• - la fig. 5 est un schéma simplifié de l'ensemble du dispositif de commande du bobinoir comportant notamment la boucle d'asservissement, selon un premier mode de réalisation de l'invention;
• - la fig. 6 est un schéma analogue à celui de la fig. 5 mais représentant un second mode de réalisation de l'invention.

In the accompanying drawings, given solely by way of example:

• - fig. 1 is a schematic perspective view of the assembly of a winder produced according to the invention;
• - figs. 2 and 3 are partial section views showing the configuration of certain components of the winder respectively at the start of the winding and a certain time after this start;
• - fig. 4 shows a sectional view, on a large scale, of the suspension of the feeler roller;
• - fig. 5 is a simplified diagram of the entire device for controlling the winder comprising in particular the servo loop, according to a first embodiment of the invention;
• - fig. 6 is a diagram similar to that of FIG. 5 but showing a second embodiment of the invention.

According to the embodiment of the invention shown in FIG. 1 the winder is associated with a die A which continuously produces a certain number of filaments B which smells coated in a coating device C and assembled by a roller D, the resulting thread E being led to the winder.

The latter comprises a frame 1 in which is rotatably mounted around an axis X-X a spindle 2 intended to receive sleeves such as F engaged on this spindle and intended respectively to constitute the cores of the coils to be formed. The spindle 2 is rotated by drive means whose output is seen at 3.

A shaft 4 of horizontal axis YY rotatably mounted 30 in paliera 5 fixed on the frame 1 and recalled by a spring 4a supports at one of its ends an oscillating arm 6 to which is attached, at its lower end, an assembly wire guide 7. This assembly is housed in a body 8 in which is formed a horizontal groove 9 through which extends a wire guide 10 in the form of a fork. The wire E passes through this wire guide 10 before being wound on the cuff F mounted on the spindle 2. As agreed in itself, the wire guide 10 is moved back and forth in the direction of the arrow f by a mechanism comprising in particular a cam with crossed threads, the thread guide 10 therefore being continuously animated with an alternating movement parallel to the axis XX of the spindle 2. The drive device of the. wire guide 10 being known, no detailed description is given in the present specification.

The body 8 carries two bearings 11 disposed respectively at each of its ends, shown schematically in fig.1 and in more detail in fig.4 to which we will return later.

An oscillating support 12 in the shape of a stirrup is mounted oscillating by pins 13 extending outwards from its lateral wings, in the bearings 11 and supports between the free ends of these wings a feeler roller 14 mounted for free rotation on a shaft 15. The pin 13 disposed near the free end of the copra 8 extends beyond the bearing 11 and is secured at its free end to a lever 16 which follows exactly the oscillating movements of the oscillating support 12. The end of this lever 16 opposite the pin 13 is forked and engaged on a pin 17 secured to a bracket 18. The latter is fixed on the slide 19 of a valve adjustment 20 (see also fig. 2 and 3) which forms the excitation element of the winder control loop.

A spring 21 attached on the one hand to a lug 22 of the lever 16 and on the other hand to a tension adjustment device 23 mounted on the end face of the body 8 is arranged so as to urge the entire support 12 and of the lever 16 in a direction which brings the probe 14 closer to the axis of rotation XX of the spindle 2.

The figs. 1 to 3 also show that the spindle 2 is provided with a peripheral flange 24 which is intended to cooperate with a flange 25 made of elastomer for example, provided on the feeler roller 14 and, as will be seen later, the setting in contact of these flanges 24 and 25 is intended to facilitate starting of the roller 14. The respective diameters of these flanges 24 and 25 are calculated to obtain at the start of winding a peripheral speed of the feeler roller at most equal or preferably slightly less than the peripheral speed of the cuff F.

It should be noted that the assembly of the support 12 and of the feeler roller 14 is balanced around the axis ZZ, which can easily be obtained by adjusting as a function of the mass of the feeler roller 14 that of the horizontal portion 12a of the support 12. The adjusting device 23 of the spring 21 is intended to adjust the pressure by which the feeler roller 14 is supported on the reel being formed.

A lever 26 integral in rotation with the oscillating arm 6 is connected at its free end to the rod of a jack 27 which constitutes the motor device of the winding adjustment loop. The jack 27 is mounted oscillating on a mounting plate fixedly mounted in the frame and supports various control members shown in detail in FIG. 5. In fig. 1, it can be seen that if the rod of the jack 27 is retracted, the oscillating arm 6 moves around the axis YY in the direction of the arrow f1 in order to move the mobile assembly which it carries away from the axis XX of spindle 2 of the winder.

The valve 20 (fig. 2 and 3) has a valve body 28, in cast iron, for example, in which a bore 29 is formed. The slide valve 19 of the valve slides in this bore 29 with a very small clearance (of about 3 microns for example), the slide 19 preferably being made of steel. It should be noted that the valve does not have any seal to avoid any parasitic force which could affect the movement of the assembly formed by the support 12, the feeler roller 14 and the lever 16. The drawer 19 has roughly in its middle a wide groove 30 which is intended to communicate with two orifices 31 and 32 applied in the body 28 perpendicular to the axis of the bore 29. The latter is closed at the respective ends of the body 28 by plugs 28a and 28b, the lower plug 28b being pierced with an opening for the passage of the rod of the drawer 19.

In fig. 4, it can be seen that the articulation pins 13 of the oscillating support 12 are mounted in ball bearings 33 forming part of the bearings 11, the bearings being provided to guarantee a perfectly free oscillation of the support 12 without any play. The bearings 33 are protected by baffles 34 against dust and other dirt which may result from winding.

To prevent clogging or sticking of the bearings 33 and baffles 34, nozzles 35 are provided mounted in the body 8 on either side of the support 12 and connected to a pressurized water circuit 36. Thus, it It is possible to permanently inject water under pressure on the protective baffles. The injected water is preferably softened to avoid scaling of the nozzles 35. It should also be noted that all the parts, including the bearings, are preferably made of stainless steel.

As can be seen in fig. 5, the valve 20 is connected by means of its orifices 31 and 32 and by respective pipes 37 and 38 to a hydraulic circuit in which the jack 27 is mounted.

The latter is connected on the side of the free face of its piston to a casing 39 and on the opposite side of the piston to an air-oil exchanger 40. Line 3 9 is connected to the inlet of an oleopneumitic valve 41, the outlet of which is connected on the one hand to line 37 and on the other hand by line 42 to another air-oil exchanger 43. the air inlets of the exchangers 40 and 43 are connected to a distributor 44 with five orifices and pneumatically controlled allowing the exchangers 40 and 43 to be placed in communication either with a source of pneumatic pressure, either with the atmosphere, under the control of the pressure prevailing in a pipe 45.

The oleo-pneumatic valve 41 is connected by a pipe 46 to the output of a pneumatic logic gate 47 of "OR" function tooth the first input is connected to the pipe 45 by a pipe 48. Its other input is connected by a pipe 49 to another "OR" logic gate 50, a first input of which is connected to a memory element 51 and a second input of which is connected by a pipe 52 to a valve 53 with manual control which is intended to cause the distance of the mobile assembly formed by the arm 6 and the body 8 of the axis XX of the spindle 2. The valve 53 is associated with a solenoid valve 54 for automatic control of this moving away, this valve being connected to one of the control inputs 55 of the memory element 51, the other input 56 of this element being connected by a pipe 57 to a remote end-of-travel valve 58 which is actuated to put the pipe 57 under pressure when the piston of cylinder 27 is in its po lower extremity.

Line 48 is also connected to the outlet of an "OR" pneumatic door 59, a first inlet of which is connected by line 60 to a manual control valve 61 making it possible to initiate the movement of movement of the aforementioned moving element of the axis XX of spindle 2. The valve 61 is associated with a valve 62 for automatic control of this same movement, this valve 62 being connected to one of the control inputs 63 of a memory element 64, the other of which control input 65 is connected by a pipe 66 to a detection valve 67 of the end of the approach movement of the moving element 6, 8. The valve 67 is therefore actuated when the piston of the jack 27 reaches its extreme upper position for pressurize line 66. The output of the memory element 64 is connected to the other input of the OR gate 59 by a pipe 68.

The winder operation is as follows:

To prepare the spindle 2, the body 8 containing the back-and-forth mechanism of the wire guide 10 must be moved as far as possible. For this purpose, the operator acts on the valve 53 for manual control of the distance.

Before starting the winding, the thread guide 10 must be brought in the immediate vicinity of spindle 2. This operation is carried out automatically when the winding machine is started using the electric closing valve 62.

After the end of the winding, the wire guide 10 must be moved away. This operation can be carried out automatically or manually using the valves 53 and 54.

To bring the wire guide 10 closer to the mobile assembly on which it is mounted, the rod of the jack 27 must be taken out. Consequently, the exchanger 40 must be exhausted, while the exchanger 43 must be pressurized. The distributor 44 must therefore be actuated as well as the oleopneumatic valve 41 which is placed in parallel on the valve 20 of the control loop: a rapid approach movement is thus obtained.

When the winding operation begins, the feeler roller 14 is not yet in contact with the cuff F disposed on the spindle 2 (see fig. 2), but since the latter is rotated by the means of drive 3, the flange 24 of this pin rotates the flange 25 of the feeler roller 14.

When the thickness wound on the sleeve F reaches a thickness of 1 to 2 mm, that is to say greater than the total thickness of the flanges 24 and 25, the surface of the coil being formed comes into contact with the feeler roller 14. Continuing to grow, the spool then pushes the roller 14 which is permanently applied there thanks to the effect of the tension spring 21, with a predetermined force of a few newtons.

During its movement, which can be of the order of 1 to 1.5 mm, for example, the roller 14 pivots the oscillating support 12 around the pins 13 as well as the lever 16 which is integral with one of these pins.

. As a result, the lever 16 pulls the slide 19 of the valve 20 downwards so that the orifices 31 and 32 of this valve 20 begin to be put in communication.

The pressurized oil contained in the exchanger 40 can then cause the rod of the jack 27 to enter, because the oil of the jack being on the side of the piston opposite the rod of the jack can exit through the pipe 38, the valve 20 , lines 37 and 42 and flow back to the exchanger 43, the latter being vented.

This has the consequence of rotating the entire crew formed by the swinging arm 6 and the body 8 so as to move the wire guide 10 and its associated reciprocating mechanism away from the reel being formed.

When the valve 20 begins to open, the movement of separation described above has a lower speed than the speed of increase of the radius of the coil. Under these conditions, the feeler roller 14 continues to be pushed back by the coil which causes an increase in the communication between the orifices 31 and 32 of the valve 20. The speed of separation of the crew 6, 8, 10 then increases until it reaches the speed of increase of the coil radius. When equal speeds are obtained, the system thus controlled keeps a stable opening through the valve 20.

The diameter of the orifices 31 and 32 of the valve 20 is calculated to allow a sufficient oil flow (at full opening) and necessary to follow the highest envisaged magnification speed, ie approximately 0.2 mm per second, for example.

As the winding continues to grow, the speed of increase of the radius of the coil decreases. The feeler roller 14 therefore gradually returns to its initial relative position under the effect of the tension spring 21, which has the effect of pushing the slide 19 in the valve 20 and partially closing the orifices 31 and 32, therefore d '' ensure constant equality of speeds away from the feeler roller and increase in the radius of the coil.

When the winding is finished, the moving element 6, 8, 10 is moved away from the axis XX of the spindle 2 thanks to the automatic supply of the solenoid valve 54 which causes the opening of the mounted oleopneumatic valve 41 in parallel on valve 20.

When the feeler roller 14 is no longer in contact with the coil, it returns to its initial position under the effect of the spring 21, which has the effect of closing the valve 20.

• - éloignement manuel: l'actionnement de la vanne à commande manuelle 53 envoie de l'air à travers les portes "OU" 50 et 47 sur la vanne oléopneumatique 41, ce qui fait rentrer la tige du vérin 27 et provoque ainsi l'éloignement.
• - éloignement automatique: une impulsion électrique appliquée à l'électrovanne 54 envoie de l'air sous pression à l'entrée 55 de. l'élément de mémoire 51 pour ouvrir ce dernier. L'élément de mémoire 51 tout en conservant cette position, envoie de l'air à travers les portes 50 et 47 sur la vanne 41, ce qui a le même effet que précédemment. Quand le mouvement d'éloignement est terminé,le vérin 27 actionne la vanne de fin de course 58 qui, par l'intermédiaire de la canalisation 57, met l'entrée 56 de l'élément de mémoire 51 sous pression, ce qui remet cet élément à son état initial fermé. Il en résulte la fermeture de la vanne 41.
• - rapprochement manuel: l'actionnement de la vanne 61 à commande manuelle envoie de l'air sous pression à travers la porte 59 sur l'entrée de commande du distributeur 44 à travers la canalisation 45. De l'air sous pression est également envoyé à la vanne 41 à travers les portes "OU" 59 et 47 par l'intermédiaire des canalisations 48 et 46. Le distributeur 44 est donc inversé, moyennant quoi de l'air sous pression est appliqué à l'échangeur 43, tandis que l'échangeur 40 est mis à l'atmosphère. Il en résulte la sortie de la tige du vérin 27.
• - rapprochement automatique : une impulsion électrique appliquée à l'électrovanne 62 envoie de l'air sous pression à l'entrée 63 de l'élément de mémoire 64 qui s'ouvre et reste dans cette position en envoyant de l'air sous pression d'une part à travers les portes 59 et 47 et les canalisations 48 et 46 à la vanne 41 et d'autre part par la porte 59 et les canalisations 48 et 45 au distributeur 44.

The various control members 53, 54, 61 and 62 act on the winder as follows:

• - manual removal: the actuation of the manually operated valve 53 sends air through the "OR" doors 50 and 47 to the oleopneumatic valve 41, which causes the rod of the jack 27 to retract and thus causes the removal .
• - automatic removal: an electrical pulse applied to the solenoid valve 54 sends pressurized air to the inlet 55 of. memory element 51 to open the latter. The memory element 51 while retaining this position, sends air through the doors 50 and 47 on the valve 41, which has the same effect as above. When the moving away is finished, the jack 27 actuates the limit switch 58 which, via the pipe 57, puts the input 56 of the memory element 51 under pressure, which restores this element in its initial closed state. This results in the closing of the valve 41.
• - manual reconciliation: actuation of the valve 61 with manual control sends pressurized air through the door 59 to the control input of the distributor 44 through the pipe 45. Pressurized air is also sent to the valve 41 through the "OR" doors 59 and 47 via the pipes 48 and 46. The distributor 44 is therefore inverted, whereby pressurized air is applied to the exchanger 43, while the exchanger 40 is vented. This results in the output of the rod of the jack 27.
• automatic reconciliation: an electrical pulse applied to the solenoid valve 62 sends pressurized air to the inlet 63 of the memory element 64 which opens and remains in this position by sending pressurized air d on the one hand through the doors 59 and 47 and the pipes 48 and 46 to the valve 41 and on the other hand through the door 59 and the pipes 48 and 45 to the distributor 44.

When the closing movement is finished, the actuator 27 actuates the end-of-stroke valve 67 which returns the memory element 64 to its initial state through the pipes 66. This memory element closing, the distributor 44 and the valve 41 also feels returned to their closed position.

The control device which has just been described with reference to FIG. 5 can be replaced, according to another embodiment, by an electronic type control device.

In this case, (fig. 6) the winder comprises, as an excitation element of the control loop, a displacement sensor 70 whose electrical output signal is proportional to the displacement of a plunger core 87 linked to the lever 16 of the previous embodiment in place of the slide valve 19 of the valve 20. This displacement sensor can advantageously be produced in the form of a differential transformer sensor manufactured for example by the firms SCHAEVITZ or NOVOTECHNIK (Federal Germany). These detection devices have the advantage of requiring practically no maneuvering effort, which is very suitable for the application envisaged here.

In the case of fig. 6, the swinging arm 6 is coupled by the lever 26 to a nut 71 of a worm gear mechanism 72 coupled to a geared motor 73 fixed on the frame of the winder.

The displacement sensor 70 is mounted on the body 8 in the same way as the valve 20 of the embodiment of FIGS. 1 to 5. It is supplied by an electrical circuit 74 which is generally delivered with the displacement sensor 70. The latter is capable of delivering a signal on a line 75 connected to the input of an amplifier 76 whose output is connected via a line 77 to a power supply 78 of the geared motor 73. The motor of the latter can be of the direct current type and at variable speed and able to rotate in both directions, for example between 0 and 3000 revolutions per minute. The power source 78 is preferably constituted by an electronic variator. All these elements being conventional, we do not give a detailed description. They can be found commercially from the company NERVUS, for example.

• Entrée E1 : commande en tout ou rien à vitesse maximale du moteur 73 pour le mouvement de rapprochement du bras 6;
• Entrée E2 : commande en tout ou rien à vitesse maximale du moteur pour le mouvement d'éloignement de ce bras;
• Entrée E3 : commande proportionnelle au signal du capteur 70 donnant une vitesse d'éloignement proportionnelle et variable d'éloignement du bras 6.

The power supply 78 has three inputs E1, E2 and E3 which have the following functions:

• Input E1: all-or-nothing control at maximum speed of the motor 73 for the closing movement of the arm 6;
• Input E2: all-or-nothing control at maximum motor speed for the movement away from this arm;
• Input E3: proportional command to the signal from sensor 70 giving a proportional and variable distance from arm 6.

• - éloignement manuel du bras 6.

The elements of the control device that have just been described are associated with several logic components which are intended to perform the same control actions as those described in connection with the embodiment of FIG. 5. These actions are briefly recalled with reference to fig.6.

• - manual removal of arm 6.

The action on an inanual control button 79 sends a signal to the input E2 of block 78 through an "AND" gate 80 and an "OR" gate 81 ..

• - Eloignement automatique.

When the moving away is finished, the lever 26 actuates a limit switch 82 which cancels the signal given by the control button 79 through an inverter circuit 83 by blocking the output signal from the "AND" gate 80.11 As a result, the moto- gear 73 is no longer powered.

• - Automatic removal.

A pulse on the input 84 of a memory 85 commands the sending of a signal on the input E2 of the block 78 through the "OR" gate 81.

• - Eloignement proportionnel.

The signal delivered by the limit switch 82 is sent to the reset input 86 of memory 85 which returns to its initial state and thus cuts off the supply to the gear motor 73.

• - Proportional distance.

The action of the coil on the feeler roller 14 causes the displacement of the core 87 of the displacement sensor 70 and places it in a position which allows the delivery of a signal which via the amplifier 76 and the block 78 causes the gear motor 73 to be fed. The crew 6, 8, 10 then moves away from the coil at low speed. If this speed is less than the speed of increase of the radius of the coil, the roller performs a pivoting movement around the axis ZZ, which displaces the core 87 of the sensor 70 so that it delivers a higher level signal which corresponds to a greater speed of the gear motor 73 therefore of the distance away from the whole of the aforementioned crew. A stable state is reached when the removal speed is equal to the speed of increase of the radius of the coil.

• - Rapprochement manuel.

To stop the moving away when the lever 26 reaches the limit switch 82, there is provided a control device 88 such as a field effect transistor for example which is mounted in parallel with the amplifier 76 and which thus cancels the output signal of the latter applied to the input E3 of block 78 when this limit switch 82 is actuated. As a result, the geared motor 73 is no longer supplied, which prevents damage to the latter.

• - Manual reconciliation.

The action on a manual control button 89 sends a signal to the input E1 of block 78 through an "AND" gate 90 and an "OR" gate 91.

• - Rapprochement automatique.

When the closing movement is finished, the lever 26 actuates a closing limit switch contact 92 which cancels the signal given by the manual control button 89 through an "OR" door 93 and an inverter 94, which blocks the output signal from the "AND" gate 90.

• - Automatic reconciliation.

A pulse on an input 95 of a memory 96 commands the sending of a signal on the input E1 of block 78 through the "OR" gate 91.

When this approximation movement is finished, the signal delivered by the limit switch 92 on the reset input 97 of the memory 96 by the "OR" gate 93 returns this memory to its initial state and therefore cuts the gear motor 73.

It should be noted that thanks to the presence of the door "DU" 93 the moving away has priority over the moving closer in order to avoid an accidental deterioration of the mechanism if the information of moving away and moving closer were to be given. simultaneously.

In the two embodiments described above, the winder comprises a spindle which can only receive a single cuff for the formation of a reel. The invention naturally applies to winders comprising two or more spindles mounted, in a manner known per se, on a barrel, each pin can be selectively placed in front of the body 8.

In addition, each spindle can be designed to receive several coils which are then wound simultaneously. In this case, the back-and-forth mechanism contained in the body 8 must be capable of actuating as many wire guides as there are. has coils to be formed.

As regards the first embodiment of FIGS. 1 to 5, it can be noted that the working fluid can be directly from the pressurized oil supplied by a hydraulic group. In this case, the air-oil exchangers 40 and 43 are naturally not necessary. However, the control members such as the valves 54 and 62 remain of the electrical type, according to the current technique in hydraulics.

Still in the embodiment of FIGS. 1 to 5, it can be noted that the valves 20 and 41 can be placed in other places in the hydraulic circuit. In fact, it is possible, for example, to mount them in parallel between the exchanger 40 and the corresponding inlet orifice of the jack. In this case, the back pressure offers on the face opposite to the piston rod of the jack. 27 is atmospheric pressure. The diameter of the jack must then be dimensioned so that the thrust of atmospheric pressure is in all cases opposed to the efforts to distance the entire crew 6, 8, 10 by compared to pin 2 and the coil, due to spring 4a.

From the above detailed description of the two embodiments of the invention, it can be seen that the latter provides a winder which has in particular the following advantages:

The thread guide mechanism 10 is moved away from the spindle receiving the reel in formation in a continuous moving away. This movement is very precisely controlled by the speed of evolution of the radius of the coil thanks to the presence of an excitation element formed either by the valve 20 or by the displacement sensor 70 which are adjustable members. continued.

The distance between the wire guide and the spool can be perfectly constant so as not to affect the deposition of the wire on the spool.

The pressure of the feeler roller 14 on the reel in formation is as low as possible and can be adjusted as desired by varying the tension of the spring 21.

Thanks to the presence of the two flanges 24 and 25 which are engaged at the start of the winding, the relative differences between the peripheral speeds of the feeler roller 14 and of the cuff F are avoided. Indeed, during start-up, the feeler roller 14 is launched at a suitable peripheral speed before coming into contact with the surface of the coil in formation.

The force of the feeler roller on the coil can be very low, that is to say of the order of one newton, which is comparatively very low compared to those used in the prior art and in particular in USP 3,547,361. As a result, in the winder according to the invention, the wound thread undergoes practically no alterations.

The sensing roller 14 is mounted on the oscillating support 12 which constitutes a mass of inertia, which makes it possible to reduce the amplitude of the oscillations that the system formed by this support and this roller can take under the effect of external forces.

Finally, it will be noted that although the winding machine is described in its application to the winding of glass wires leaving a die, it is obvious that it can also be used in any other application in which it is a question of producing coils from a fragile textile product, in particular sensitive to abrasion with high winding speeds (50 m per second or more) requiring precision winding. Of course, the winder can be used in all applications in which the operating conditions are less severe. In addition, thanks in particular to the arrangement shown in FIG. 4 of the oscillation bearings of the oscillating support 12, the winder can be used in all cases where the working conditions are highly dirty. It then suffices to use a suitable solvent for washing the joints.

Claims (22)

1. Winder, in particular for wires of thermoplastic material such as glass wires drawn from a die, comprising a fixed frame, a spindle rotatably mounted in the frame and intended to receive the wire to be wound, means for spindle drive, a thread guide assembly mounted oscillating in the frame, a thread guide mechanism mounted on said arm and whose thread guide is intended to move in a reciprocating motion, and a control device intended to cause the rotation of said thread guide assembly in particular in the direction of the distance with respect to said spindle, as a function of the growth of the radius of the coil during formation, said control device comprising a loop of adjustment formed by a probe for detecting the growth of the reel, a motor device intended to rotate said arm and an excitation element of said motor device according to the position of said probe, said winder being characterized in that e said excitation element (20, 70) is a continuously controlled element. 2. Winder according to claim 1, characterized in that said excitation element (20, 70) is actuated by the displacement of a member (16) connected to said probe (14) under the effect of the magnification of the radius of the reel being formed. 3. Winder according to any one of claims 1 and 2, characterized in that said probe (14) is mounted on a support (12) mounted in turn oscillating on said thread guide mechanism (8, 10) around a horizontal axis (ZZ) and in that said support (12) and said probe (14) are balanced by gravity around said horizontal axis (ZZ), and resiliently and adjustable in a direction which applies the probe (14) on the surface of the coil being formed with an adjustable and relatively low force. 4. Winder according to claim 3, characterized in that said oscillating support comprises a stirrup-shaped member whose core (12a) is mounted horizontally and whose branches extending upward, are articulated on said guide mechanism -wire (8,10) and carry at their free end said probe (14). 5. Winder according to claim 4 ₉ . characterized in that said oscillating support (12) is integral with one of the ends of a lever (16) whose opposite end is coupled to said element excitation (20,70) and to which is hung an adjustable tension spring (21) also fixed to said wire guide mechanism (8,10). '' 6. Winder according to any one of the preceding claims, characterized in that said probe (14) comprises a flange (25) cooperating with a flange (24) formed on said spindle (2), and in that the diameters of said flanges (24, 25) are chosen so as to obtain at the start of the winding a peripheral speed at most equal, or preferably slightly less than the peripheral speed of a sleeve (F) intended to be engaged on said spindle (2) to receive said coil. 7. Winder according to any one of the preceding claims, characterized in that said control loop is of the oleopneumatic or hydraulic type, in that said motor device (27) of the swinging arm (6) is a jack and in that said excitation element is a hydraulic valve (20) mounted in the supply circuit of said cylinder and comprising a passage whose dimension is continuously variable as a function of the position of said probe (14) so as to control said cylinder in one direction which moves said arm (6) away from said pin (2). 8. Winder according to any one of claims 1 to 6, characterized in that said control loop is of electromechanical type, in that said motor device of the swing arm (6) comprises an electric motor (73) and in that said excitation element is a displacement sensor (70) controlling the supply circuit (76, 78) of said electric motor (73), said sensor comprising a movable element (87) coupled to said probe and generating at the output of the sensor a continuously variable control signal for controlling said motor (73) in the direction of the separation of the arm (6) relative to said spindle (2). 9. Winder according to any one of the preceding claims, characterized in that said control loop comprises logic control means (41, 46, 47, 49, 56, 88, 79 to 85) making it possible to cause by a command manual or automatic movement of rapid removal of said arm (6) relative to said spindle (2) by disabling said excitation element (20, 70). 10. Winder according to any one of the preceding claims, characterized in that the said control loop comprises in addition to control means making it possible to cause, by manual or automatic control, the movement of rapid approaching of said arm (6) relative to said spindle as well as selection means (44, 78) for determining the direction of travel of said motor device ( 27, 73), to selectively ensure the execution of a movement of approaching or moving away from said arm (6). 11. Winder according to claim 7 taken together with any one of claims 9 and 10, characterized in that said valve (20) comprises a valve body (28) fixed on said thread guide mechanism and having a cylindrical bore ( 29) in which is received a drawer (19) coupled to said probe (14) and into which transversely open two aligned orifices (31, 32) connected in the hydraulic circuit of said jack (27), said drawer (19) having a groove ( 30) intended to continuously determine the placing in communication of said orifices (31, 32) as a function of the position of said probe (14). 12. Winder according to claim 11, characterized in that said slide (19) is adjusted in the bore (29) of the body (28) of said valve (20) with a very small clearance of the order of 3 microns per example. 13. Winder according to claim 7 taken together with any one of claims 9 to 12, characterized in that said quick-release control means comprise a valve (41) of the all-or-nothing type mounted in parallel with said valve with adjustable opening (20), and logic means (47, 49 to 56) for selectively ensuring manual or automatic control of said valve (41) with control by all or nothing. 14. Winder according to claim 13, characterized in that said logic means are associated with a valve (58) for detecting the end of the stroke of said cylinder (27) in the direction of the distance from the arm (6), said limit switch being capable of inhibiting the manual or automatic control of the all-or-nothing control valve (41). 15. Winder according to any one of claims 11 to 14 when they depend on claim 10, characterized in that said quick approximation means comprise logic control means (59 to 65) making it possible to cause by manual control or automatic movement of rapid approach of said arm (6) and in that said selection means comprise a selector (44) controlled by the logic control means for approaching and moving away and connected between the supply circuit of said jack (27) and a pressure source. 16. Winder according to claim 15, characterized in that said logic means for controlling approximation (59 to 65) are associated with a valve (67) for detecting the end of the stroke of said jack (27) in the direction of approximation , said limit switch valve (67) being capable of inhibiting the manual or automatic control signal generated by said logic means (59 to 65). 17. Winder according to claim 7, characterized in that said cylinder (27) is supplied via two air-oil exchangers (40, 43). 18. Winder according to any one of claims 9 and 10, when they depend on claim 8, characterized in that the output of said displacement sensor (70) is connected to an amplification circuit (76, 78) connected in turn to said electric motor (13). 19. Winder according to claim 18, characterized in that said quick distance control means comprise a semiconductor component (88) connected in parallel to said amplifier (76) and associated with a limit switch element (82) for inhibiting said amplifier (76) when the proportional distance has reached its maximum amplitude. 20. Winder according to claim 19, characterized in that said logic means are associated with a limit switch (82) actuated when the motor (73) brings said arm (6) into its extreme position of separation said switch being capable of inhibiting the manual or automatic control generated by the logic means (79 to 85). 21. Winder according to any one of claims 18 to 20, when they depend on claim 10, characterized in that said quick approximation means comprise logic control means (89 to 97) making it possible to cause by manual control or automatic movement of rapid approach of said arm (6) and in that said selection means comprise a device (78) capable of exciting said motor (73) so as to make it selectively rotate at high speed (inputs E1 and E2 ) as a function of the logical state of said logical means of approaching and moving away. 22. Winder according to claim 21, characterized in that said logic means for controlling approximation (89 to 97) are associated with a limit switch (92) actuated when the motor (73) places said arm (6) in its final approximation position, said switch being capable of inhibiting the manual or automatic control signal generated by said logic means (89 to 97). 23. Winding machine, in particular for wires of thermoplastic material such as glass wires drawn from a die, comprising a fixed frame, a spindle rotatably mounted in the frame and intended to receive the wire to be wound, means for spindle drive, a thread guide assembly mounted oscillating in the frame, a thread guide mechanism mounted on said arm and whose thread guide is intended to move in a reciprocating motion, and a control device intended to cause the rotation of said thread guide assembly in particular in the direction of the distance with respect to said spindle, as a function of the growth of the radius of the coil during formation, said control device comprising a loop of adjustment formed by a probe for detecting the growth of the reel, a motor device intended to rotate said arm and an excitation element of said motor device according to the position of said probe, said winder being characterized in that q eu said probe (14) is in the form of a roller whose axis is parallel to the axis (XX) of the spindle (2) and in that the latter and said probe (14) are provided respectively peripheral flanges (24, 25) intended to come into contact with one another at the start of the winding machine, the diameters of the flanges (24,25) being chosen so as to obtain, at the start of winding, a peripheral speed of the roller at more equal, or preferably slightly less than the peripheral speed of a sleeve (F) intended to be engaged on said spindle (2) to receive said coil.

Images