FR2476692A1 - DEVICE FOR THE PRODUCTION OF EFFECT YARN - Google Patents

Abstract

DEVICE FOR THE MANUFACTURING OF EFFECT NETS. ON AT LEAST ONE FRONT FACE OF PRESSURE ROLLER 2B NEAR THE CONTACT LINE BETWEEN SUPPLY ROLLER 2A AND PRESSURE ROLLER 2B, A STATIONARY WIRE GUIDE 13 FOR THE BASE WIRE G1, G2 IS ARRANGED SENSITIVELY IN THE PLANE OF THE PASSAGE WIRE PASSING THROUGH THE ABOVE-PREVIOUS CONTACT LINE AND THROUGH COMPONENTS E, G1, G2 JOINED BEHIND THE CONTACT LINE AND TWISTED BY WRONG TORSION.

Description

Device for the manufacture of spinning yarn

  The present invention relates to a device for the manufacture of effect yarn, comprising at least one pair of supply rollers for feeding an effect yarn and consisting of a driven supply roller and a pressure roller applied thereto. last, a feed device for a base wire, a hollow spindle carrying a spool of binding yarn and having a torsion limiter, and a pair of

draw rolls.

  In a known device of this type for the manufacture of effect yarn (German Patent Application 24 39 732), the effect yarns and the base yarn pass through the pair of supply rollers in common. By a separate brake for the yarn forming the effect and for the basic thread, it is possible for the two components to pass through the pair of supply rollers with different speeds. The speed of passage of the yarn forming the effect is generally greater and is determined by the speed of the suppliers rollers. The base yarn is retained by a more intense feining action and its speed is substantially determined by the draw rolls. As the supply rolls rotate at a speed which is greater than that of the base wire, there is produced between the latter and the supply rollers a slip which causes a rapid wear of the surfaces of the pair of supply rollers. Undesirable grooves are formed in the surface. Furthermore, the slip causes the level of the base wire friction that results in fouling of the machine. The known device also allows only the manufacture of a limited number of effects. The

  The regularity of the effects yarn also leaves something to be desired.

  when the device is switched on after elimination of a fault. With the known device, it is also not

  possible to achieve flame effects or

  twisting with exact succession of colors. Due to the formation of the grooves in the supply rollers, the delivery becomes uncontrollable, i.e. the difference in speed with which the yarn forming the effect is brought

to the basic thread.

  The present invention more specifically relates to a device for the manufacture of yarn effects of the aforementioned type, which excludes virtually any wear of the pair of suppliers of rolls, prevents to a large extent the friction of the base wire and further allows the manufacture of a yarn with regular effects with a large number of possibilities

of variation.

  This result is achieved according to the invention in that, on at least one end face of the pressure roller, near the contact line between the supply roll and the pressure roller, a stationary wire guide for the wire of the base is disposed substantially in the yarn running plane defined by the nip and the joined yarns

  behind the line of contact and twisted by false twist.

  The installation of this wire guide placed on the side of the front surface of the pressure roller makes it possible to pass the base wire next to the slot formed between the two rollers. As the base yarn no longer touches the pair of supply rollers delivering the effect yarn, it avoids wear of this pair of supply rollers and simultaneously also a friction of the base wire and therefore a fouling of the machine. On the other hand, the junction point

  the basic and the effects yarn is determined by the guide-

  wire in which case however, this junction point lies behind the slot between the rollers, that is to say the line of

  contact of the pair of suppliers rollers and also

  the wire guide seen in the unwinding direction of the wire. Depending on the tensions of the yarn involved, this junction point can move in the direction of travel of the yarn, which improves the regularity of the yarn effects. By moving the wire guide, particularly in the direction of travel of the wire, it is also possible to move the junction point of the base wire and the effects yarn so that the device can be better adapted to the various twisting conditions which result from different speeds of rotation, delivery speeds and wire tension. This gives a greater possibility of variation for the effects to be produced. Different effects can also be obtained according to that of the front faces

  of the pressure roller on which is arranged the wire guide.

  It is therefore advantageous to install a guide-

  respectively on the two end faces of the pressure roller. These two thread guides not only allow to bring the basic thread from the other side to the effects yarn but also to simultaneously bring two basic threads

  to the effects yarn from two different sides.

  The invention will be better understood on reading the

  following description of a non-limiting embodiment,

  with reference to the accompanying drawing, in which: Figure 1 is a side view of the device; Figure 2 is a plan view along the arrow II of Figure 1; Fig. 3 shows the pair of supply rollers with two wire guides for the base wires;

  FIG. 4 is a side view of FIG.

  In the frame 1 of the machine are mounted next to one another several devices according to the invention, one of which is described below with respect to its structure and function. The device firstly comprises a pair of supplier rollers 2 constituted by a supply roller

  2a driven continuously and by a pressure roller 2b relative

  narrowly in the axial direction. This pressure roller is mounted on a support 3 and is elastically compressed on the driven roller supplier 2a by known means not shown in detail. Since the effect yarn E may consist of one or more preparation tows, a drawbench comprising a median driven roll 4 and a rear roll 5 is mounted in front of the pair of rollers 2 suppliers seen in the direction of scrolling some thread. The ratio between the rotational speeds of the rear cylinder 4 and the center cylinder 5 can be adjusted by means of a gearbox while the ratio of speeds between the pair of supply rollers 2 and the

  rear and median cylinders 4.5 can be set in stages.

  On the other hand, for the supply of one or more basic threads G1, G2 there is provided a pair of separate supply rollers 6 which also consist of a continuous supply roll

6a and a pressure roller 6b.

  Behind the pair of rollers 2 suppliers, a hollow spindle 7 is rotatably mounted in the frame 1 of the

  machine, this pin being driven by a tangential belt

  The hollow spindle 7 carries a spool of binding thread 10 which rotates with it. The binding thread

  B is taken from the spool 10 and introduced at the upper end.

  upper 7a of the hollow coil. At the lower end of the hollow spindle is installed a torsion limiter 11 around which or through which pass the various components E, D and Gi and G2 to tweak together. Such torsion limiters are also referred to as limiting regulators. Such a torsion limiter is for example

  described in German Patent Application No. 20 53 385.

  The axis of the hollow spindle 7 is advantageously placed in the plane of travel of the yarn e-e. By yarn running plane, is meant here the plane passing through the contact line L between the supply roller 2a and the pressure roller 2b and by the components E and Gi and G2 together behind the line

  contact L and twisted by false twist.

  A pair of traction rollers 12 is disposed behind the torsion limiter 11 seen in the direction of travel of the thread. Behind this pair of pull rollers, the yarn

  finished effects is wound in a known manner but not

  sented. The rotational speed ratios between the pair of traction rollers and the pairs of rollers suppliers 2

  and 6 were also adjustable in continuous range.

  As can be seen in particular in FIGS. 3 and 4, a stationary wire guide 13 for the base wire Gi is provided on at least one front face of the pressure roller

  2b near the line of contact L. This wire guide station-

  13 is also substantially placed in the plane of

  scrolling the thread e-e. Another identical wire guide is advantageous

  also disposed on the other end face of the pressing roller 2b for the base wire G2. The two thread guides being identical, only one is described below. The wire guide 13 is advantageously made U-shaped and its two branches 13a and 13b extend to a support 14 placed near the periphery of the pressure roller 2b. The ends of the two branches 13a and 13b of 1'U are rigidly connected to this support 14. The wire guide 13 including its two branches 13a and 13b is advantageously made of spring steel to have a certain flexibility. The support 14 can be moved transversely to the plane of travel of the wire e-e and also in the direction of the scrolling of the components E and Gi

and G2 twisted by false twist.

  It is advantageous that the axial length of the pressure roller 2a is smaller than its diameter. It is recommended to keep the axial length of the pressure roller as small as possible so as to prevent a contact between the base wire Gi or G2 and the edge of the pressure roller 2b and to reduce to a minimum triangle of wire between the line of contact L, the junction point V of

  yarn components and yarn guide 13.

  The manufacture of the effect yarns with the device according to the invention is carried out as follows: For the spinning effect, one or two basic threads Gi and G2 are introduced according to the criteria of the yarn which one wishes to obtain. regarding resistance and optics. In such a case, the base wires Gi and G2 from unrepresented coils are fed to the pair of supply rollers 6 of the basic threads through the connecting rod 15.

  the wire is then stabilized by wire guides not re-

  presented. The basic threads are then fed by guide-

  16 helical wire to the wire guide 13 already described which are dis-

  placed on both sides of the pressure roller 2b. The threading or hooking of the basic threads Gi and G2 in the thread guides 13 is facilitated by the fact that the two U-shaped branches 13a and 13b extend to the periphery of the pressing roll 2b and are arranged in parallel one to the other at least on

part of their total length.

  Effect yarn E, which may consist of one or more preparation tows, enters the drawing bench

  4.5. Between the rear cylinder 5 and the median cylinder 4 is

  perform a preliminary stretch and between the center cylinder 4

  and the pair of rollers providing 2 a main draw.

  At the nip, the E-yarn is tight

  between the supply roll 2a and the pressing roll 2b.

  Behind the line of contact L, the two basic wires Gi and G2 as well as the effects yarn meet at the point of junction V. They are twisted by false torsion between this junction point V and the torsion limiter 11. As the V-shaped yarn is brought with a higher delivery speed than the two basic yarns G 1 and G 2, the yarn wraps around the basic yarns and the desired effect is obtained according to the speed of delivery and the tension as well as the speed of rotation of the hollow spindle 7. Furthermore, together with the components E, G1 and G2 twisted by false twist, the binding thread B passes through the hollow spindle 7 substantially parallel to the components twisted by false twisting of the yarn. As a result of the rotation of the hollow spindle, the base yarns G 1 and G 2 and the effect yarn E are twisted with the binding yarn below the torsion limiter 11 seen in the direction of travel of the yarn so that the effects are fixed and can not be changed. The effect yarn formed between the torsion limiter 11 and the traction rollers

  12 is then wound in a known manner.

  By moving the wire guides 13 in the direction of movement of the components G1, G2 and E twisted by false twist, it is possible to adapt the junction of the different components to the different twisting conditions resulting from the different speeds of rotation, speed of delivery and tensioning. some thread. Er. moving the wire guides 13 towards the center cylinder 4, the junction point V of the contact line L is brought closer together and reversed. If the effect yarn is made only from a base wire Gi and a component for spinning yarn, the basic yarn runs with less lateral deviation than the component of the yarn effects, since the latter has a lower tension of the yarn. The latter, coming from the nip is wound sharply deflected on the base wire Gi. In the case of the same direction of rotation of the hollow spindle 7, depending on whether the base thread is hooked to the right or left threaded fluid 13, a yarn with more or less rough effects is obtained. This is explained by a more or less strong friction between the spun effect component laterally deflected and the pressure roller 2b. This influence on the spun effect component can be used in

  the device according to the invention to achieve different effects.

  Twisting effects are obtained without use of the drawbench and using only the pairs of rollers 2 and 6 suppliers by different rates of delivery of the basic son Cl, G2 and the effect wire E. Also, in moving the wire guide 13 and consequently by changing the position of the junction point V, it can be realized

different effects.

Claims (10)

  1. A device for the manufacture of effect yarns, comprising at least one pair of supply rolls for feeding the effect-forming components, and consisting of a driven supply roll and a pressure roll applied thereto, a feed device for a basic thread,   a hollow spindle carrying a spool of binding yarn-and com   carrying a torsion limiter, and a pair of traction rollers, characterized in that on at least one end face of the pressing roller (2b) in the vicinity of the contact line L between the supply roll (2a) and the pressure roller (2b), a stationary wire guide (13) for the base wire (Gi, G2) is disposed substantially in the passage plane of the wire ee passing through the line of contact (L) and by the components (E, Gi , G2) gathered behind the line of contact (L) and twisted by false twist.   2. Device according to claim 1, characterized in that a wire guide (13) is disposed on each face front of the pressure roller (2b).   3. Device according to claim 2, characterized in that the axial length of the pressure roller (2b) is smaller than its diameter.   4. Device according to claim 1 or 2, characterized   characterized in that the wire guide (13) can be moved in the direction of movement of the components (E, Gi, G2) twisted by false twist of the yarn.   5. Device according to claim 1 or 2, characterized   characterized by the fact that the wire guide (13) can be moved   transversely to the plane of the thread (e-e).   6. Device according to any one of the claims   1 to 5, characterized in that the wire guide (13) is U-shaped and that its two branches (13a, 13b) extend to a support (14) arranged near the periphery of the pressure roller (2b), at least one of   branches (13a, 13b) being connected to this support (14). -   7. Device according to claim 6, characterized in that the two branches (13a, 13b) are arranged parallel to each other at least on a part of their total length.   8. Device according to claim 6 or 7, characterized   characterized in that the wire guide is constituted by a spring steel wire.   9. Device according to any one of the claims   1 to 8, characterized in that the axis of the hollow spindle (7) is placed in the yarn passing plane (ee) and the contact line (L) of the pair of the supply rollers (2a, 2b ) is arranged perpendicular to the axis of the hollow spindle.   10. Device according to any one of the claims   1 to 9, characterized in that for the base wire or wires (G1, G2) there is provided a particular pair of supply rollers (6) whose delivery speed is adjustable. continuously.