EP2004534A1

EP2004534A1 - Method of manufacturing a winding with separate threads

Info

Publication number: EP2004534A1
Application number: EP07731870A
Authority: EP
Inventors: Hervé BOURGEOISAT; Jean-Michel Cogniaux
Original assignee: OCV Intellectual Capital LLC
Current assignee: Owens Corning Intellectual Capital LLC
Priority date: 2006-04-10
Filing date: 2007-04-04
Publication date: 2008-12-24
Anticipated expiration: 2027-04-04
Also published as: RU2008140115A; KR101311097B1; WO2007116181A1; CA2647962C; JP2009533298A; JP4987964B2; RU2430007C2; BRPI0710492A2; CN101448724A; DE602007010116D1; CA2647962A1; CN101448724B; EP2004534B1; ATE486037T1; CN103030028A; FR2899571A1; US20120111983A1; US8882019B2; FR2899571B1; KR20080109914A

Abstract

Method for the manufacture of wound packages comprising a plurality of assembled strands, characterized in that one separates the strands coming from a spinneret into at least 2 blankets, in which each one of the blankets is wound on the same wound package with the help of a traveler, said wound package supported by one of the spindles, one proceeds to start the movement of the circular pirn battery in such a way as to switch one of the spindles from its spooling phase to its rest phase, during this transition phase between the spindles, one proceeds to a separation of the rovings traveling from the spinneret to the surface of said wound package with the help of a separation device, one brings the cursor closer to the surface of the wound package and the latter then intercepts the trajectory of each one of the separated rovings in such a way as to enclose each one of the rovings within said traveler, and one positions the separation device in its second position.

Description

METHOD FOR MANUFACTURING A SEPARATE WIRE WINDING

The present invention relates to a method of manufacturing windings comprising a plurality of son wound in parallel unwindable in the form of a single assembled wick, these son being for technical use, in particular based on glass or thermoplastic polymer. According to another aspect of the invention, it also relates to the winding thus obtained and the device for implementing this method.

In the manufacture of reinforcing glass yarns, the manufacture of an assembly wick is the result of a complex industrial process which consists of obtaining threads from molten glass threads flowing through the die orifices. These fillets are drawn as continuous filaments, and then these filaments are combined into base yarns, which yarns are then generally collected in the form of cakes intended for internal use because they are difficult to transport. The cakes are then positioned on creels that feed a winder on which is formed the cylindrical ball of roving (wick) assembled. The products obtained are not free of defects such as undulations or loops from differences in the tension of the basic threads.

The manufacture of multifilament wick in a single operation and directly under die (direct roving) leads to the realization of cylindrical coils of a single large wire whose strands (in the sense of continuous filaments) are well equitendus.

Within the meaning of the invention, the coils are also in the form of straight-sided windings or in the form of cylindrical windings, and are generally referred to as "roving" or "ball" depending on their destination final.

The form of coil 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 threads 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 of fibers or threads).

Conventionally a winder is placed roughly under a die, from which descends one or more strands of son gathered at a point or several points, these son are then wound live on a rotating spindle by means of one or more sliders at a groove for axially distributing the threads gathered along one or more reels by a reciprocating movement synchronized with the rotation of the spindle, this slider or these sliders are part of a subset that the is called encroisure, which is mounted on a movable support allowing its permanent repositioning during the winding, parallel to the spindle axis to allow it to maintain a certain distance between the slider or sliders and the outer cylindrical surface of the coil or coils whose diameter changes throughout its or their construction.

A first winding family is said to manual restart, that is to say that an operator is responsible for manually restarting the windings, and it is possible to wind on the same winding several son, up to eight, even sixteen threads (each of the threads consisting of a strand of filaments).

A second winder family is called automatic restart. In this case, the winder is more complex than those described above, and it further comprises a barrel supporting a plurality of pins (generally at least two in number), each of the rotatable spindles, being adapted to stretch and wind at least one stack successively on each of the pins, one of the pins being active while the other is at rest to allow the unloading of the stack just made, a automatism coupled to the various actuators of the winder being responsible for performing the passage of at least one strand of filaments from one spindle to the other during the rotation of the barrel.

With this type of technology, it is possible to obtain several stacks on one and the same spindle, each of the stacks consisting of only one strand of coiled thread having its own characteristics.

On the other hand, it is not possible to obtain, as from the manual restart winders, on the same stack, a winding of several strands of optimal quality, which consists in its ability to be easily unrolled, without the presence of loops. , parasitic nodes, with limitation of friction.

The present invention is specifically concerned with winders whose recovery is automated that do not have the disadvantages mentioned above, and which allow the winding on the same coil, the winding separated according to an optimal quality, of at least two strands of characteristics ( in particular number of wires per strand, choice of material forming the wire ...) different or identical

To do this, it is necessary that the accuracy of the deposit resulting from an axial distribution of the son wound live on the rotating spindle is optimal.

To this end, the method of manufacturing windings comprising a plurality of son assembled by means of a winder comprising a barrel provided with at least a first and a second spindle, each of the first and second spindles being successively either rest, that is to say during an unloading phase or being mobile in rotation, that is to say during a winding phase of a winding is characterized in that

the threads coming from a spinneret are separated into at least two plies, each ply forming a strand of threads is wound on one and the same winding with the aid of a slider enabling the separated strands to be deposited simultaneously on the surface of said winding. said winding being supported by one of the pins, the barrel is set in motion so as to pass one of the spindles from its winding phase to its rest position, while the other spindle then moves from its rest position to its winding position, during this operation. movement the cursor is moved away from the surface of the winding

during this step of transition between the pins, a separation of the bits proceeding from the die to the surface of said winding is carried out by means of a separation device, the latter being able to occupy a first position in which it allows firstly to separate the wicks from each other and secondly to maintain them in a separated position, and a second position in which it does not interfere with the path of the wicks,

- The cursor is brought closer to the surface of the winding, the reciprocating movement then intercepts the path of each of the separate locks so as to trap each of the locks in said cursor and allow the deposition on the surface of the winding,

the separating device is positioned in its second position.

Thanks to these arrangements and in particular to the presence of the separating device, the locks are constantly preserved and identified during the entire transition phase, namely during the passage from one winding spindle to the other, thus making it possible to wind on a spool. same winding at least two wicks separately.

In preferred embodiments of the invention, one or more of the following may also be used:

- It causes the attachment of the wick within the cursor by a translational movement of the cursor with respect to said wick, it first coming to guide the wick through a guide zone and then in a second lock at within a lock zone, - It causes the attachment of the wick in the cursor by an indexing movement in the cursor position relative to that of the wick,

the separation device is positioned in the vicinity of the path of the locks so as to intercept their path and to push back at least a first lock of at least one second lock on each side of the lock. 'a median plane,

According to another aspect of the invention, it relates to a winder allowing the implementation of the method described above, the winder essentially comprising a frame, this frame comprising a barrel movable in rotation relative to the frame, said barrel being from minus two pins each adapted to support at least one winding, each of the pins being rotatable about a first axis substantially perpendicular to the diameter of the winding so as to simultaneously stretch and wind at least two bits in the form of a winding of separated locks, and a crimping device at least provided with a slider for depositing on the surface of the winding the locks separated from one another, characterized in that it further comprises a device for separation can occupy a first position in which it allows on the one hand to separate from each other the wicks running from a die to the curseu r and secondly to maintain them in a remote position, and a second position in which it does not interfere with the path of the wicks. In preferred embodiments of the invention, one or more of the following may also be used:

the separating device comprises at least one pallet provided at one of its sides with at least two edges, these edges being intersecting so as to define between them a plan for separating the passage of at least two wicks each of the strands being directed by these edges to immobilization zones positioned respectively at the free ends of said ridges,

the separation device is mounted rotatably with respect to the frame, along an axis substantially parallel to the axis of rotation of the pins,

the slider is mounted in the crease device and comprises a wire guide of at least two grooves, each of the grooves being adapted to receive a wick,

the slider comprises a generally trapezoidal wire guide whose two sides form curved walls adapted to guide a wick to a wall projecting from one of the other two sides of the wire guide, this projecting wall to constrain the displacement of the wick in a groove located at the foot of said projecting wall, said groove being adapted to immobilize said wick,

the slider comprises a wire guide generally of trapezoidal shape, one of the sides is provided with a plurality of grooves, each of the grooves being adapted to immobilize a wick, the grooves comprise a blind portion with a parallel blank and a portion Extending outwardly of said wire guide, according to yet another aspect of the invention, it relates to a winding obtained by the method described above, characterized in that it comprises a plurality of turns, preferably at least two, each of the turns being constituted by at least one wick made of a material and being separated from one of them by a pitch p.

In preferred embodiments of the invention, one or more of the following provisions may be used in addition: the materials forming each of the turns are different,

the materials forming each of the turns are identical, each of the locks comprises an identical number of filaments, each of the locks comprises a different number of filaments,

at least one of the locks is based on filaments of glass-coated yarns and thermoplastic polymer, for example a polyolefin, a polyamide, a polyester or a thermoplastic polyurethane;

at least one of the locks is based on glass filaments, it comprises at least two separate turns, each of the turns being respectively formed of a lock of 400 to 4000 glass filaments, preferably 800 to 1600 filaments of glass and a wick of 200 to 4000 polypropylene filaments, preferably 600 to 1600 polypropylene filaments.

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. On the drawings:

FIG. 1 is a diagrammatic front view of a winder according to the invention,

FIG. 2 is a front view of the separating device intended for use in 2 locks; FIG. 3 is a view of a slider that can be used in combination with the separating device of FIG. 2;

According to a preferred embodiment of a winder 1 according to the invention illustrated in Figure 1, it comprises a metal frame obtained by a technique of mechanically welded metal elements previously machined or available as standard in the trade. This frame essentially comprises a substantially rectangular base resting on legs suitably 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 fiberizing position.

On this base is assembled a closed structure partially 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 cabinet-shaped structure is provided with the control and control devices necessary for the various regulations of the various components which will be described later in the present description, of networks, hydraulic, electrical, compressed air, and other necessary fluids the operation of said organs.

On the closed structure cooperates a cylinder 2 which projects laterally. This barrel 2 is rotatably mounted about an 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).

Indeed, this barrel 2 constitutes a support assembly of pins 3, 4. In FIG. 1, it can be seen that the barrel 2 has two pins 3, 4, in diametrically opposite positions [if there is only a pin, it is not possible to make the automatic transfer]. Alternatively, not shown in the figures, one could design a barrel with at least three, four pins, or more, depending on the space available and the capabilities of the die positioned upstream). Within the winder 1, the barrel 2 makes it possible to bring a spindle 3 previously unloaded and provided with at least one blank sleeve (within the meaning of the invention, a sleeve is a support made of plastic, cardboard or other material which is intended for receiving the spool of thread or the winding of threads) in the winding position and another spindle 4 having its full cuffs in the unloading position by rotations of 180 °. Each of the pins 3, 4 integral with the barrel 2 is a rotating assembly adapted to stretch and wind the wire 5 on a sleeve previously introduced on the spindle. This winding is performed along a first axis of rotation substantially parallel to the axis of rotation of the barrel relative to the structure of the frame. In Figure 1, there appears another element which is essential for the realization of a coil. This is the device for positioning and guiding the wire on pin 6. In this example, it is a movable cursor in a groove, the cursor moving linearly along a second axis substantially parallel to the first axis; the assembly being mounted within an assembly that can move closer to or away from the outer peripheral surface of the coil during the winding thereof. This set is commonly called "crease device".

Conventionally, and it will be possible to refer to FIG. 3, a crimping device 6 comprises a member shaped as a moving slider 7 linearly within a groove, this movable slider 7 makes it possible to position at least one wire 5 on the spindle 3 or 4 in rotation, the movement printed by the wire guide 7 consisting essentially of a movement of oscillations or beats only over a length of the coil.

To obtain a complete winding, the slider 7 is movably mounted in a movement back and forth in translation on a shaft integral with the frame and parallel to the axis of the spindle, this second translational movement thus making it possible to cover the length of the coil.

In a preferred embodiment, the slider 7 shown in FIG. 3 allows the simultaneous removal at the surface of the same and only winding of at least two strands, each strand consisting of a plurality of strands 5, these two wicks. being separated by a pitch p in the form, in this case, of two almost contiguous turns. This type of winding with separate turns, however, guarantees optimal unwinding, without the risk of knots and parasitic loops. This slider 7 is of generally trapezoidal shape whose base 8 is substantially parallel to the axis of rotation of the winding.

At its sides, the slider 7 has a curved or inclined surface delimiting in fact guide surfaces 9, 10 which, when moving the slider in a direction substantially parallel to the axis of rotation of the spindle, intercept the trajectory of a first wick in a direction of movement and a second wick in the other direction of reciprocating movement, these wicks coming from a die 11 (visible in FIG. 1) placed above the winder 1, these wicks thanks to these inclined guide surfaces thus being directed towards a projecting wall 12 with respect to the base 8 of the slider 7.

This projecting wall constrains each of the locks in a retention zone 13, 14 and immobilization shaped in a groove (in Figure 3, there are 2 grooves, one for each bit).

Within this groove 13, 14, the wick is free to slide with the least friction possible, moreover, the material constituting the guide surfaces and the grooves is chosen so as to locally have a high hardness and a coefficient of friction. the smallest possible so as not to destroy and damage the wick of filaments and in particular at its sizing.

The slider 7, substantially trapezoidal, has inclined walls at its sides 9, 10 and at the inlet walls of each of the grooves 13, 14 so as to promote the guide of the wick to the bottom of the groove which is parallel axis. As a variant, the inventors have envisaged interception of the trajectory of the locks not by an alternating movement of the slider 7 and have preferred to privilege an indexing movement in position of the slider 7 with respect to the path of the locks, this indexing movement in position being facilitated by the different servocontrols both in position and in speed with which a winder of this type is provided, all the movements of the spindle (s) 3, 4, the barrel 2, the crimping device 6 and its slider 7, the separation device 15 which will be mentioned below, is controlled by a programmable controller responsible for controlling and controlling at all times this assembly for optimum winding of a winding.

Whatever the embodiment of the cursor 7, the operation of the latter is combined with that of the separation device 15, shown in Figures 1 and 2.

This separating device 15 is rotatably mounted relative to the chassis (hinge point marked A) and travels between a rest position in which the path of the locks is not deflected by the position of the separating device 15 and a so-called working position during which the separating device 15 intercepts the path of the strands so as on the one hand to separate or separate them from each other and secondly to keep them separate during the transition phase.

The phase of transition is defined as the phase during which the wicks which have just been wound on a winding until a full spool is obtained from the winding and stretching on a first spindle must pass automatically (c that is to say without human intervention stimulus) on another spindle (due to the rotation of the barrel), this second spindle to allow winding the drawing strands of filaments on the surface of at least a second winding.

During this transition phase, it is essential that the wicks initially wound on the winding of a first spindle in a separate manner (if there are two strands of threads 5 of identical or different material, this corresponds to a spool two turns) are not mixed or lost during rotation of the barrel and that the two wicks can again be wound and stretched in separate form on a second winding supported by the second spindle.

To do this, the decomposition of the movements is as follows: During the transition phase, the separation device 15 moves from its rest position to its active position, the strands of filaments or son 5 coming from a die 11 located at above the winder 1 come into contact with a pallet 16 secured to the separating device 15.

As can be seen in FIG. 2, the pallet 16 generally forms a rhombus whose one of the axes of symmetry is positioned in such a way that it separates, in a median plane, the path of the locks, each of the locks passing from else of this median plane.

Given the inclined faces 17, 18 of the pallet 16, each of the wicks which is in contact with this face is directed towards the free ends of the rhombus towards a retention zone 19, 20 or adapted groove to receive with the least possible friction each of the locks, the locks can not escape from these areas during the entire transition phase.

When each of the locks is held in its retention zone 19, 20, the creasing device deviates from the surface of the winding or the full spool, releasing the slider 7 of its wick considered, the barrel 2 performs a rotational movement so as to arrange the second pin 3 or 4 ready to wind and stretch a second winding in conditions similar to the previous winding.

When the second spindle 3 or 4 is ready to wind, the crimping device 6 approaches the surface of the winding, the wicks (always held in their respective retention area 19, 20 of the pallet 16) lick the winding surface (they remain strained by the position of the first spindle) the separating device 15 is positioned in its rest position, releasing the locks from their respective retention zone 19, 20.

The locks then come to intercept the reciprocating movement of the slider 7 as explained above. When each of the grooves 13, 14 of the slider 7 is engaged with its respective bit, the winding of the winding can be initialized and the coils obtained from a winder operating according to the modalities of the method described above are distinguished from the prior art significantly: Indeed, it is possible to wind on the same spindle axis and on at least one winding (or in particular two juxtaposed) several wicks (at least two in the examples), each of the wicks may be constituted of a number n and n 'of identical or different filaments, from the same material or from different materials, these materials being chosen from those for technical use, such as for example those based on glass, thermoplastics (polypropylene in particular ). These windings have the ability to unwind, although each of the turns are separated by a pitch p, without risk of knots or parasitic loops.

By way of example, an example of winding based on "Twintex" ®, which is a registered trademark of a glass and thermoplastic yarn, is given below.

This winding comprises at least 2 separate turns, each of the turns being respectively formed of a wick of 400 to 4000 glass filaments, preferably 800 to 1600 glass filaments and a wick of 200 to 4000 filaments of polypropylene, preferably of 600 to 1600 filaments of polypropylene.

Indeed, it may be advantageous to obtain on a winding at least 2 separate turns depending on the intended applications

Glass and thermoplastic: to make combined fabrics resistant to tearing or punching

- Comet and glass: for applications of ballistic reinforced thermoplastic plates with controlled delamination, by thermoformed fabrics or unidirectional fabrics

- Comet and thermoplastic for mats with low levels of glass. For these applications, there were no solutions in the prior art that discloses windings with separate turns of identical nature and possibly different title.

Claims

1 - Method of manufacturing windings comprising a plurality of son (5) assembled using a winder (1) comprising a barrel (2) provided with at least a first (3) and a second spindle (4) ), each of the first and second pins (3, 4) being successively either at rest, that is to say during an unloading phase or mobile in rotation, that is to say during a winding phase of a winding, characterized in that the yarns (5) coming from a spinneret (11) are separated into at least two plies, each of the plies forming a thread wick (5) is wound on the same winding with the aid of a crimping device (6) provided with a slider (7) for simultaneously depositing on the surface of said winding the son (5) thus separated, said winding being supported by one of the pins (3, 4),

the barrel (2) is set in motion so as to pass one of the spindles (3, 4) from its winding phase to its rest position, the other spindle then passing from its rest position to its winding position, during this setting in motion, the slider (7) is spaced from the surface of the winding

during this step of transition between the pins (3, 4), the wicks running from the die (11) are separated as far as the surface of said winding by means of a separating device (15), the latter can occupy a first position in which it allows on the one hand to separate the wicks from each other and secondly to maintain them in a remote position, and a second position in which it does not interfere with the path of the wicks,

the slider (7) is brought closer to the surface of the winding.

the separating device (15) is positioned in its second position,

the slider (7) then intercepts the path of each of the separated strands so as to trap each of the strands within said slider (7) and to allow the deposit on the surface of the winding,

2. Method according to claim 1, characterized in that it causes the attachment of the wick within the slider (7) by a translational movement of the slider (71 relative to said wick, the latter coming into a first time guide the wick through a guide zone (9, 10) and in a second lock in a locking zone (13, 14).

3. Method according to claim 1, characterized in that it causes the attachment of the wick within the slider (7) by an indexing movement in position of the wire guide relative to that of the wick.

4. Method according to one of the preceding claims, characterized in that the separating device (15) is positioned in the vicinity of the path of the wicks so as on the one hand, intercept their path and on the other hand to repel at least a first wick of at least a second wick on either side of a median plane.

5. Winder (1) for carrying out the method according to one of the preceding claims essentially comprising a frame, this frame comprising a cylinder (2) rotatable relative to the frame, said barrel (5) being from at least two pins (3, 4) each adapted to support at least one winding, each of the pins (3, 4) being rotatable about a first axis substantially perpendicular to the diameter of the winding so as to stretch and wind simultaneously at least two locks in the form of a winding of separate locks, and at least one crimping device (6) provided with a slider (7) for depositing on the surface of the winding the locks separated one of the other, characterized in that it further comprises a separating device (15) which can occupy a first position in which it allows one hand to separate from each other the wicks running from a die ( 11) to the cursor (7 ) and secondly to maintain them in a remote position, and a second position in which it does not interfere with the path of the wicks.

6. Winder according to claim 5, characterized in that the separating device (15) comprises at least one pallet (16) provided at one of its sides with at least two edges (17, 18), these edges being intersecting so as to define between them a separation plane of the passage of at least two wicks, each of the strands being directed through these edges (17, 18) to immobilization zones (19, 20) positioned respectively at the free ends of said ridges.

7. Winder according to one of claims 5 or 6, characterized in that the separating device (15) is rotatably mounted relative to the frame, along an axis substantially parallel to the axis of rotation of the pins.

8. Winder according to one of claims 5 to 7, characterized in that the slider (7) is mounted in the crimping device (6) and comprises at least two grooves (13, 14), each of the grooves being adapted to receive a wick.

9. Winder according to one of claims 5 to 8, characterized in that the slider (7) comprises a generally trapezoidal wire guide whose two sides form curved walls (9, 10) adapted to guide a wick up to to a projecting wall (12) with respect to one of the other two sides of the wire guide, this wall (12) projecting to constrain the movement of the wick in a groove (13, 14) located at the foot of said projecting wall (12), said groove being adapted to immobilize said wick.

10. Winder according to one of claims 8 or 9, characterized in that the grooves (13, 14) comprise a parallel flank blind portion and a flaring portion outwardly of said guide wire.

11. Winding obtained by the method according to one of claims 1 to 4, characterized in that it comprises a plurality of turns, preferably at least two, each of the turns consisting of at least one wick consisting of a material and being separated one of them from a step p.

12. Winding according to claim 11, characterized in that the materials forming each of the turns are different.

13. Winding according to claim 11, characterized in that the materials forming each of the turns are identical.

14. Winding according to claim 11, characterized in that each of the locks comprises an identical number of filaments.

15. Winding according to claim 11, characterized in that each of the locks comprises a different number of filaments.

16. Winding according to one of claims 11 to 15, characterized in that at least one of the locks is based on glass filaments and thermoplastic comêlés.

17. Winding according to one of claims 11 to 15, at least one of the locks is based on glass filaments.

18. Winding according to one of claims 11 to 17, characterized in that it comprises at least two separate turns, each of the turns being respectively formed of a wick of 400 to 4000 glass filaments, preferably 800 to 1600 filaments glass and a wick of 200 to 4000 polypropylene filaments, preferably 600 to 1600 polypropylene filaments.