EP0468918B1 - Système de tirage à l'eau avec un effet de freinage variable - Google Patents

Système de tirage à l'eau avec un effet de freinage variable Download PDF

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Publication number
EP0468918B1
EP0468918B1 EP91810514A EP91810514A EP0468918B1 EP 0468918 B1 EP0468918 B1 EP 0468918B1 EP 91810514 A EP91810514 A EP 91810514A EP 91810514 A EP91810514 A EP 91810514A EP 0468918 B1 EP0468918 B1 EP 0468918B1
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EP
European Patent Office
Prior art keywords
yarn
chamber
fibril
thread
retarding liquid
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Revoked
Application number
EP91810514A
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German (de)
English (en)
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EP0468918A1 (fr
Inventor
Felix Graf
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/223—Stretching in a liquid bath

Definitions

  • the invention lies in the field of textile technology and relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 8 for drawing synthetic filaments, as is known from EP-A-0 176 937.
  • a stretching method is known from DE-A-1 435 704 in which the stretching is carried out by means of different speeds of feed rollers and stretching rollers and the fibers are heated in two baths at different temperatures.
  • this does not result in a hydrodynamic stretching, since the baths can only cause heating of the thread but no braking.
  • the invention described here sets itself the task of refining the mentioned method and the corresponding devices in such a way that they can be roughly and finely adjusted for different yarn qualities, for different yarn speeds and for different manufacturing processes, so that the stretching is optimal in every case Product can deliver.
  • a method and device-like means are to be shown, with the help of which the hydrodynamic braking effect can be influenced in a targeted manner.
  • the device used to carry out the method should be adjustable within the broadest possible limits, so that it is not only for processing different yarns can be used at different speeds for optimal stretching, but that there are also opportunities to integrate stretching into automatic monitoring and regulation of the manufacturing process.
  • FIGS. 1a to 1d represent the temperature behavior and the mechanical tension behavior of a moving fibril in a fluid stretching arrangement in four types of representation as a function of the distance that the fibril travels in the brake fluid.
  • the brake fluid is constantly circulated, in this representation from B in to B out, ie in countercurrent. Of course, the arrangement can also be operated in co-current.
  • Figure 1b shows the temperature profile of the small, limited fibril section Z on its passage through the brake fluid.
  • T x denotes various temperature sections with regard to the passage through the brake fluid.
  • the temperature profile is essentially dependent on the throughput speed and the drawing or thread tension.
  • Figure 1c shows the mechanical tension curve P of two different considerations, namely the stretching tension P s , which is necessary to stretch the thread, and the tension P f (thread tension), under which the thread is.
  • P sx and P fy denote different sections of the voltage.
  • FIG. 1d finally shows the geometrical change of the limited fibril zone Z on its way through the brake fluid, namely before and after a relatively well definable area G, the so-called stretching point.
  • this constriction take place at a temperature corresponding to the glass transition point (English second order transition point) at which the yield stress drops sharply with increasing temperature. Below this temperature, the filament is brittle (brittle fractures), above that the achievable orientation and thus the strength of the stretched product decrease, so that the ideal stretching and thus chamber temperature is at the glass transition point.
  • the stretching process in the brake fluid according to FIGS. 1a to 1d proceeds as follows.
  • the filament or fibril Before entering the drawing arrangement, the filament or fibril has a temperature which is at least 50 ° C. lower than the melting point (so-called quenching temperature) and which should preferably be below the temperature of the glass transition point. From the moment it enters the brake fluid, it warms up relatively quickly to the temperature of the brake fluid (approximately in the first half of the chamber). With increasing warming, the tensile stress necessary for the stretching of the polymer drops to approximately the same extent as the temperature in the fibril rises due to the warming in the brake fluid. This is particularly clear in the area of the so-called glass transition point.
  • the stretching process can be carried out in such a way that an approximately isothermal stretching takes place. If necessary, the mass flow of the brake fluid (compared to the Mass flow of the thread material) can be adjusted by flow control so that the almost isothermal drawing takes place.
  • the thread tension (P f ) also increases suddenly at the stretching point (P f3 ), since the filament has to be accelerated to the higher speed.
  • the higher thread speed after stretching thus results in an even steeper increase in thread tension (P f4 ), although the fibrils have become thinner after stretching (F s ) and the friction surface between the fibril and the braking fluid has thus become somewhat smaller.
  • a basically identical stretching process can also be carried out with a thread that consists of a large number of fibrils, for example 30 to 50. It is crucial that all fibrils of the yarn are exposed to the same physical condition as the sample fibril just discussed. This is preferably achieved by passing the thread in the form of a fibril ribbon through the stretching arrangement, for which purpose the stretching device must be designed accordingly.
  • the drawing process therefore consists in heating the individual fibrils of the yarn in a quasi-closed chamber with the help of a liquid heat transfer medium as evenly as possible against the glass transition temperature and at the same time increasing the thread tension by hydrodynamic braking in such a way that it then achieves the drawing tension necessary for drawing the yarn reached when the yarn has reached the glass transition temperature or can just reach through the heat generated during stretching. Since the glass transition temperature and the drawing tension are different for different yarns, it is desirable that, in addition to this drawing process, processes are developed which allow a corresponding setting of other process parameters, especially the temperature and the braking effect in the drawing arrangement. This is also desirable in terms of fine adjustment to optimize the stretching process and for automatic or manual regulation.
  • FIG. 2 schematically shows an exemplary embodiment of a liquid drawing arrangement which corresponds in its basic features to the chamber of EP-A-0 384 886 cited, but comprises additional means for setting the method parameters, so that the method and device are adapted to different yarn qualities and can be adapted to different yarn speeds.
  • the thread F consists of more than one fibril, it is advantageous if it runs through the brake fluid in the form of a ribbon in which the individual fibrils are arranged next to one another as far as possible (in a plane perpendicular to the plane of the paper in FIG. 2).
  • the brake fluid is traversed by the thread in a main chamber 1, which is closed except for a narrow, slit-shaped inlet opening 11 and an equally narrow, slit-shaped outlet opening 12 for the fibril bundle.
  • a brake fluid is pumped through this main chamber 1 such that it enters the chamber through the inlet 2 and leaves it through the outlet 4.
  • the main chamber is divided parallel to the thread running through two walls 5.1 and 5.2 into a thread channel 1.2 and two outer channels 1.1 and 1.3.
  • the two outer channels contain adjustable throttling means 6.1 and 6.2, through which their flow cross-section can be narrowed locally.
  • a prechamber 7 which can be open on the inlet side.
  • the same brake fluid is pumped through this prechamber, namely through the inlet 8 into the prechamber, through the outlet 9 from the prechamber.
  • the outlet 9 is provided with means which enable the liquid level 14 in the antechamber to be set, for example with a displaceable pipe bend 10.
  • a cylindrical deflection element 13 is attached, the main task of which is to move into the main chamber 1 Arrange incoming fibril bundles in such a way that the individual fibrils run through the main chamber 1 in the form of a fibril ribbon as far as possible.
  • Two further, for example cylindrical, deflection elements 15.1 and 15.2 are attached directly below the liquid level 14 and can be displaced with it, the main task of which is to squeeze out the air carried by the thread so that it is not carried into the chambers.
  • An arrangement as shown schematically in FIG. 2 allows the two most important parameters of the stretching process, the temperature of the brake fluid and its braking action to be set up and adjusted within wide limits.
  • the setting and regulation of the temperature of the brake fluid is achieved, for example, with a corresponding thermostatted reservoir for the brake fluid (not shown in FIG. 2), from which the brake fluid is pumped into the two chambers 1 and 7.
  • the hydrodynamic braking effect that the brake fluid exerts on the thread mainly depends on the length of the thread running in the liquid, on the viscosity of the liquid, on the flow conditions in the chambers and on the speed of the thread.
  • the length of the thread course in the liquid is set and regulated by setting and regulating the liquid level 14 in the prechamber 7. Main chambers of different lengths can also be used.
  • the viscosity of the fluid is adjusted by selecting the brake fluid accordingly.
  • the flow conditions in the main chamber are set and regulated by setting and regulating the flow direction, the flow rate and flow rate of the brake fluid, by adjusting the position of the walls 5.1 and 5.2 and the restrictors 6.1 and 6.2 and by using walls 5.1 and 5.2 with various Thread-facing surfaces.
  • the flow conditions in the main chamber 1 are primarily given by the direction and strength of the circulation of the brake fluid.
  • the brake fluid flows, for example, from bottom to top, that is, against the direction of the thread.
  • the thread however, especially when it is running at high speed, carries liquid with it, so that a flow in the thread running direction occurs in the thread channel 1.2, i.e. the circulation flow from bottom to top is a circular flow in the thread channel 1.2 down and in the outer channels 1.1 and 1.3 superimposed on top.
  • Adjustable throttling points 6.1 and 6.2 installed in the outer channels 1.1 and 1.3 not only throttle the circulation flow and thus increase the pressure in the chamber part in the flow direction upstream of the throttling points, but also the circulating current generated by the thread and thus influence the braking effect.
  • Strong throttling at throttling points 6.1 and 6.2 increase the braking effect without increasing the risk of turbulent disturbances in the thread channel.
  • the width of the thread channel 1.2 which can be adjusted by the adjustability of the walls 5.1 and 5.2, can also act as a throttle for the circulating currents and thus, especially if it is chosen to be very small, influence the braking effect.
  • the nature of the surfaces of the walls 5.1 and 5.2 facing the thread will also influence the braking effect, since it depends, among other things, on the surface texture of the flow in the thread channel 1.2.
  • the variation of the braking effect by varying the distance between the thread and the chamber walls is based on the physical fact that the flow through a hollow body in the vicinity of the inner wall is not dependent, as far enough from the inner wall, only on the pressure difference and on the flowing medium.
  • the friction of the medium on this wall also influences the flow, which in turn is influenced by parameters such as the surface quality the wall is dependent.
  • the outermost layer of the medium has a very low speed compared to the inner regions. If the speed difference between inner and outer regions now becomes large, flow stalls can also occur in an intermediate region, which lead to local turbulence and thus to speed components perpendicular to the direction of flow.
  • the braking effect of the arrangement can also be changed by additional mechanical braking on the deflection elements 11, 15.1 and 15.2.
  • Such mechanical braking in the area of the pre-chamber 7 then results in increased thread tension when entering the main chamber 1.
  • the deflection elements are arranged such that they can be adjusted parallel to their axes, so that the respective deflection angle can be set and regulated. Since the deflection elements are immersed in the brake fluid, their wetting is always ensured, which means that increases in the friction on these elements that are harmful to the thread due to dry running are excluded.
  • the schematic FIG. 2 represents an exemplary embodiment of the method and the device according to the invention.
  • the advantages of this variant result from the division of the path of the thread in the brake fluid into the antechamber and main chamber. This means that with a continuously adjustable path length, an increased pressure in the main chamber is still possible, which further minimizes the introduction of air through the thread and increases the selection of brake fluids (boiling point).
  • the device can only be used in the position shown, that is to say with a thread running vertically from top to bottom. There are no leakage problems at the inlet opening 11.
  • the prechamber can be missing, so that the use of the device is no longer restricted to a vertical thread running direction, but the path length can only be adjusted continuously by using chambers of different lengths.
  • the inlet opening 11 must be designed in such a way that leakage through this opening is kept to a minimum.
  • Such a chamber is advantageously operated with overpressure, so that the walls of the inlet opening 11 always remain wetted and if there is any contact between these walls and the fibrils, there is no excessive mechanical friction.
  • the separation between the open antechamber and the quasi-closed main chamber can be missing, which means that the device can only be used vertically and no excess pressure can be generated in the chamber.
  • the main chamber can contain only one adjustable wall 5 or the adjustable walls can be missing at all, which means a simplification in terms of production technology.
  • the deflection elements immediately below the liquid surface in the prechamber can be missing, as a result of which the air carried by the thread is not pressed out, which can lead to increased foaming of the brake fluid. Mechanical braking is then reduced to a minimum, which can prove to be an advantage for sensitive yarns.
  • the means for forming a fibril band can be missing, which results in a simplified device for processing individual fibrils.
  • the device can be designed such that it can be traversed by a plurality of threads running parallel to one another.
  • the chambers must then be correspondingly wider and, at the entrance to the main chamber, there are advantageously additional guide elements which ensure a separate passage of the individual threads.
  • FIGS. 3a and 3b now show in detail an exemplary embodiment of the device according to the invention for carrying out the described method.
  • the device is cut in FIG. 3a in the same way as the schematic device in FIG. 2 and in FIG. 3b as a top view of the base part.
  • the device consists of a main chamber 1 and a prechamber 7 and is designed for the passage of two threads running in parallel (only the left thread is shown in FIG. 3b).
  • two variants are shown, one (with a high level of liquid) with solid lines and position numbers corresponding to FIG. 2, the other (with a low level of liquid) with dashed lines and with apostrophized position numbers.
  • the device advantageously consists of two parts, a base part 21 and a cover part 22, which can be folded apart along the passage plane of the threads for the introduction of the thread or threads.
  • the base part is arranged in a stationary manner, for example, and carries the inlet and outlet connections for the brake fluid, air, etc.
  • the thread F which can be a single fibril or a bundle of fibrils, runs, as already described in connection with FIG. 2, through the prechamber 7, through which brake fluid flows (influence 8, outlet 9).
  • the threads are also braked more or less mechanically, with which the thread tension at the entrance to the main chamber 1 can be set, for example.
  • the threads are shaped into fibril bands by the deflection element 13, for example a cylindrical ceramic rod, and separated by the guide elements 24.1, 24.2 and 24.3 and their width is restricted.
  • Corresponding guide elements 24.4, 24.5 and 24.6 are also arranged at the thread exit of the device.
  • the same device can then also be operated without pre-braking and with a reduced travel through the brake fluid if the input 8 for the brake fluid into the prechamber 7 is connected as its output.
  • the brake fluid leaking from the inlet opening 11 into the main chamber 1 then collects in the antechamber 7 and rises to a level 14 ′ which is designed such that the deflection element 13 is still covered with liquid.
  • the threads F ' are not guided over the deflection elements 15.1 and 15.2, but rather directly onto the deflection element 13.
  • a very narrow channel (slot) 11, preferably only embedded in the base part 21, is provided for the entry of the threads into the main chamber 1.
  • a drain pan 4 is formed at a distance from the inlet gap 11, through which the brake fluid operated in countercurrent flows.
  • This drain pan 4 like the main chamber 1, is molded into both parts, base part 21 and cover part 22.
  • An influence trough 2 is arranged against the thread exit of the main chamber 1 and is configured in the same way as the drain trough 4. Both troughs 2 and 4 are assigned their function according to the direction of flow, since the chamber can be operated in cocurrent or countercurrent. The actual stretching chamber is located between these two trays, and the threads run in the parting plane between the base and cover parts.
  • the delivery is influenced by a certain, minimal distance between thread and wall 5 to the braking and thus the stretching effect.
  • the effective distances are determined empirically, for example, and used in the process flow.
  • Short slit-shaped channels 12.1, 12.2, 12.3, separated from one another by further troughs or transverse chambers 25.1 and 25.2, are provided for the thread outlet, so that they form a kind of labyrinth in which dragged-along brake fluid flows off without pressure or under vacuum (pressure difference also above normal pressure) can.
  • a pull-off edge 26 with a preferably small deflection radius is arranged, at which the thread is deflected and pressed off.
  • guide elements 24.4, 24.5 and 24.6 are attached to the thread exit of the device, as at the entrance to the main chamber.
  • FIGS. 3a and 3b The device represented by FIGS. 3a and 3b is obviously small and can be used not only in the thread running direction after the spinnerets, but also, if appropriate, at other points in the production process.
  • FIGS. 4a and 4b show the stretching arrangement according to FIG. 3 in cross-section at the height of the inlet opening 11 or outlet opening 12 (FIG. 3a) and through the main chamber 1 (FIG. 3b).
  • 21 chamber recesses are embedded in the base part, which correspond to corresponding chamber recesses in the cover part 22.
  • the cross section of the thread channel 1.2 on the one hand and the distance between filaments and wall 5 on the other hand can be adjusted.
  • a general surface that is to say with a slight curvature, if necessary, can also be realized for order.
  • the plane as an “order surface” can be brought about by a cylindrical pin (for example 13 in FIG. 2), whereas a corresponding “folder” must be provided for a curved surface.
  • the drawing-in process is very machine-friendly and simple with the described stretching device and can therefore also be easily automated.
  • the liquid inflow and the blown air are stopped and the chambers 1 and 7 are emptied, for example, by suction.
  • the device is folded apart and the thread is placed in the thread guide at the inlet 11 and outlet 12 with a suction gun. He lays down in the ribbon arrangement of his fibrils. Possibly. Intersections disappear in the subsequent thread pass.
  • the cover part 22 can then be placed on the base part 21 again and fixed.
  • the flow for the brake fluid is then released again and the blowing or suction air is started.
  • the effects of heat and braking are slow and controlled.
  • the thread section that extends beyond the exit of the stretching arrangement is placed with the suction gun on the subsequent thread supply unit (roll or bobbin winder). If the suction power of the pistol is too low to pull the thread that resists due to the excessive braking force of the brake fluid, it may be necessary that the thread must be placed on the subsequent delivery unit before the brake fluid is released. As soon as the thread finds enough entrainment there, the brake fluid can be released and the process started.
  • the chamber parts in the cover part 22 are shown as angular in FIGS. 3 and 4, this in no way means that they must be designed in this way.
  • the chamber parts can be optimally shaped in terms of flow, depending on the brake fluid used, for which purpose a corresponding other cover part is then placed.
  • Ceramic pins are advantageously used for the deflection elements 13, 15.1 / 2 and guide elements 24.1 / 2/3/4/5/6 used in the antechamber and in the main chamber. These can be done using screws be fastened in corresponding threaded holes in the chamber walls. These screws can each carry an elastic insert, for example a small cylinder made of nylon, in a blind hole at their end and protruding from this blind hole. When installed, this insert acts as a transfer of the pressing force from the screw to the ceramic pin without damaging the ceramic pin.
  • an elastic insert for example a small cylinder made of nylon
  • FIG. 6 shows a further, exemplary embodiment of the stretching arrangement according to the invention.
  • this comprises two sliding walls 5.1 and 5.2.
  • This variant is particularly characterized by deflecting elements 61.1, 61.2 ..., for example ceramic pins, which are alternately attached to the surfaces of the walls 5.1 and 5.2 facing the threads.
  • deflecting elements 61.1, 61.2 ... for example ceramic pins, which are alternately attached to the surfaces of the walls 5.1 and 5.2 facing the threads.
  • These deflection elements not only influence the flow properties in the thread channel 1.2, but also deflect the thread and thereby brake it, depending on their mutual distance.
  • Such an arrangement has the additional advantage that, as with very narrow walls, the liquid layers surrounding the threads are peeled off without increasing the risk of pinching the fibrils.
  • the threads are repeatedly supported at short intervals by the deflection elements, which effectively soothes a fluttering of the fibrils in the thread channel.
  • FIG. 7 shows schematically how the device according to the invention can be switched on in a manufacturing process.
  • a synthetic material in the form of an extrudable liquid is pressed out through a spinneret arrangement 30 in the wall of a tank (not shown), the individual fibrils of a thread 31 being formed.
  • eight such filaments are shown in FIG. 7, in real application examples however, it is usually a large number of fibrils that are combined into a thread.
  • the individual spinnerets of the spinneret assembly can be arranged in any pattern.
  • the spinnerets are arranged equidistantly on a circle, in the center of which lies the axis of the thread formed from the filaments.
  • the thread is passed through a device 32 according to one of FIGS. 2, 3 or 6 and from there onto a tension roller 34 and an associated separating roller 36, both of which the thread revolves several times. Then the thread is wound up by a winding device, not shown, for example to a cylindrical bobbin 38.
  • the pulling roller can be designed, for example, according to European Application No. 349829 and the winding device according to European Application No. 367253.
  • the pull roller 34 is driven so that it rotates about its axis perpendicular to the drawing plane of the figure. Due to the multiple wrapping of the tension roller 34 and the separation roller 36, the thread is “bound” to the rollers so that they exert a tensile force on the thread with which the fibrils are pulled out of the spinnerets of the device 30 and through the drawing bath 32 according to the invention.
  • the speed v1 at which the material is pressed through the spinnerets and the speed v3 at which the thread is drawn off the tension roller determine the titer of the thread created.
  • the winding device is driven such that the speed at which the thread is wound up corresponds to the speed v3.
  • the total stretch achieved with a stretch ratio of v1: v3 is divided by this arrangement into a spinning stretch of the still plastic fibrils with a stretch ratio v1: v2 and a hydrodynamic stretch with a stretch ratio v2: v3, where v2 represents the speed at which the thread enters the stretching bath 32 according to the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (17)

  1. Procédé pour l'étirage hydrodynamique d'un fil, constitué par une ou par plusieurs fibrilles, à l'intérieur et au moyen d'un liquide de freinage entourant le fil, au travers duquel le fil est tiré avec une force de tirage,
    caractérisé par le fait que
    le fil, lorsqu'il est constitué par plus d'une fibrille, est formé en un ruban de fibrilles disposées l'une à côté de l'autre, essentiellement dans un plan, que la fibrille individuelle ou le ruban de fibrilles est réchauffé dans un bain du liquide de freinage, à la température du point de température de verre de la matière fibrillée, et que l'effet de freinage est réalisé de telle manière que la tension de fil (Pf) atteint, à l'intérieur du bain de liquide de freinage, la hauteur de la tension d'étirage (Ps) caractéristique pour la fibrille ou le ruban de fibrilles.
  2. Procédé selon revendication 1,
    caractérisé par le fait que
    le liquide de freinage est mis en mouvement d'écoulement et est maintenu à une température qui se situe dans les alentours de la température de verre de la matière fibrillée à étirer.
  3. Procédé selon revendication 2,
    caractérisé par le fait que
    l'effet de freinage de l'arrangement servant à l'étirage de fibrilles déterminées, est réglé et/ou régulé pour une vitesse déterminée, par le réglage d'au moins un des paramètres suivants:
    a) longueur du parcours fait par les fibrilles dans le liquide freinage,
    b) direction, quantité et vitesse d'écoulement du liquide de freinage,
    c) freinage mécanique additionnel,
    d) viscosité du liquide de freinage,
    e) tourbillonnement du courant du liquide de freinage,
    f) distance entre la fibrille ou le ruban de fibrilles et des éléments stationnaires qui influencent l'hydrodynamique.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé par le fait que
    plus d'un fil est guidé à travers un arrangement commun d'étirage.
  5. Procédé selon l'une des revendications 2 à 4,
    caractérisé par le fait que
    la pression de chambre est réglée de telle manière que le liquide de freinage utilisé peut être mis en circulation avec une température supérieure à son point d'ébullition.
  6. Procédé selon l'une des revendications 2 à 5,
    caractérisé par le fait que
    le débit massique passant à travers l'arrangement d'étirage est au moins dimensionné de telle sorte qu'il en résulte une gestion de température isothermique.
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé par le fait
    qu'en plus, le fil est freiné, dévié et/ou dirigé mécaniquement, avec des éléments mécaniques correspondants de freinage, de déviation et/ou de direction, et que ces éléments sont plongés dans le bain de liquide de freinage.
  8. Dispositif pour l'étirage hydrodynamique d'au moins un fil synthetique (F, 31) constitué au moins par une fibrille, à l'intérieur et au moyen d'un liquide de freinage constitué par un moyen délivreur de fil, par exemple un arrangement de buses de filage (30), un moyen (34) pour produire une force de tirage sur le fil (F, 31), et un arrangement d'étirage (32) disposé entre le moyen délivreur de fil et le moyen pour produire la force de tirage,
    caractérisé par le fait que
    l'arrangement d'étirage (32) possède une partie de base (21) avec au moins une partie de chambre moulée, et une partie de couvercle (22) avec au moins une partie de chambre moulée, que la partie de base (21) et la partie de couvercle (22) peuvent être amenées en position d'ensemble de telle manière qu'au moins une chambre principale (1) servant à la réception du liquide de freinage est constituée, et que l'arrangement d'étirage possède des moyens réglables (5) pour le réglage de l'effet de freinage, et des moyens correspondants de réglage (23), ainsi que des moyens pour le réglage et la régulation de la température du liquide de freinage, de telle manière que le fil (F, 31) atteint la température de verre dans le liquide de freinage.
  9. Dispositif selon revendication 8,
    caractérisé par le fait que
    l'arrangement d'étirage possède un dispositif d'entrée (13) servant à ordonner des fils constitués par plus de une fibrille en un ruban de fibrilles, ordonnées en surface.
  10. Dispositif selon l'une des revendications 8 ou 9,
    caractérisé par le fait
    qu'au moins une paroi de séparation (5) est disposée dans la chambre principale (1), parallèlement au sens de déplacement du fil et entre la paroi de la chambre et le fil ou les fils, laquelle divise la chambre principale (1) en un canal de fil (1.2) et au moins un canal extérieur (1.1), et que l'arrangement possède des moyens de déplacement au moyen desquels la distance de cette paroi de séparation et la surface de traversée du fil ou des fils peut être ajustée depuis l'extérieur.
  11. Dispositif selon revendication 10,
    caractérisé par le fait que
    des éléments de déviation (61) sont montés sur les surfaces des parois de séparation, faisant face au fil ou aux fils.
  12. Dispositif selon revendication 10,
    caractérisé par le fait que
    des moyens d'étranglement (6) sont montés dans le canal extérieur (1.1) ou dans les canaux extérieurs (1.1, 1.3).
  13. Dispositif selon revendication 8,
    caractérisé par le fait que,
    dans le sens de déplacement du fil, une anti-chambre (7) est disposée devant la chambre principale (1).
  14. Dispositif selon revendication (13),
    caractérisé par le fait que
    l'anti-chambre (7) possède une sortie (9) pour le liquide de freinage et des éléments de mise en ordre afin d'ordonner les fibrilles en un ruban, et que les éléments de mise en ordre sont diposés de telle manière qu'ils plongent dans le liquide de freinage.
  15. Dispositif selon revendication 13,
    caractérisé par le fait que
    l'anti-chambre (7) est équipée d'une entrée (8) et d'une sortie (9) pour le liquide de freinage, et que celles-ci sont reliées par des moyens servant à la circulation du liquide de freinage.
  16. Dispositif selon revendication 13,
    caractérisé par le fait que
    l'anti-chambre (7) est pourvue de moyens de réglage afin de régler le niveau de liquide.
  17. Dispositif selon l'une des revendications 8 à 16,
    caractérisé par le fait que
    la chambre principale (1) fermée, ou la chambre principale (1) et l'anti-chambre (7), sont reliées avec des moyens servant à la circulation du liquide de freinage, avec des moyens utilisés pour la régulation de l'écoulement du liquide de freinage, et des moyens de gestion de la température du liquide de freinage, a l'aide desquels la chambre ou les chambres peuvent être maintenues en surpression, et à une température déterminée.
EP91810514A 1990-07-27 1991-07-02 Système de tirage à l'eau avec un effet de freinage variable Revoked EP0468918B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2499/90 1990-07-27
CH249990 1990-07-27

Publications (2)

Publication Number Publication Date
EP0468918A1 EP0468918A1 (fr) 1992-01-29
EP0468918B1 true EP0468918B1 (fr) 1995-03-08

Family

ID=4235180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810514A Revoked EP0468918B1 (fr) 1990-07-27 1991-07-02 Système de tirage à l'eau avec un effet de freinage variable

Country Status (4)

Country Link
US (1) US5307547A (fr)
EP (1) EP0468918B1 (fr)
JP (1) JPH0657574A (fr)
DE (1) DE59104851D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0613967B1 (fr) * 1993-03-05 1997-05-14 Maschinenfabrik Rieter Ag Dispositif pour l'étirage d'un fil synthetique dans un bain d'étirage
DE19546783C1 (de) * 1995-12-14 1997-07-03 Inventa Ag Verfahren zur Herstellung von vollorientierten und relaxierten Filamentgarnen aus synthetischen Polymeren
DE19546784C2 (de) * 1995-12-14 1999-08-26 Inventa Ag Vorrichtung zur relaxierenden Wärmebehandlung von Filamentgarnen aus synthetischen Polymeren
JP3509668B2 (ja) 1999-04-09 2004-03-22 株式会社ケイエスピー ピックアンドプレース装置
DE10060300A1 (de) * 1999-12-10 2001-06-21 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Verstrecken von textilen Fasern
JP6962453B2 (ja) * 2018-03-30 2021-11-05 三菱ケミカル株式会社 繊維延伸装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077004A (en) * 1956-03-23 1963-02-12 Du Pont Filament drawing
US3002804A (en) * 1958-11-28 1961-10-03 Du Pont Process of melt spinning and stretching filaments by passing them through liquid drag bath
US3068062A (en) * 1960-07-25 1962-12-11 Monsanto Chemicals Method for the production of zein textile fibers
US3124631A (en) * 1961-03-22 1964-03-10 Process for providing high density dry spun
NL290967A (fr) * 1962-04-02
DE1435461C3 (de) * 1964-02-22 1978-04-06 Fa. Carl Freudenberg, 6940 Weinheim Spinndüse zum Schmelzspinnen von Fadenscharen
US3497910A (en) * 1966-08-13 1970-03-03 Toray Industries Apparatus for the drawing of synthetic fiber tows
US4059668A (en) * 1973-11-13 1977-11-22 Monsanto Company Method of stretching a tow
JPS60134011A (ja) * 1983-12-22 1985-07-17 Toray Ind Inc 熱可塑性重合体の溶融紡糸方法および装置
IN166291B (fr) * 1984-09-27 1990-04-07 Norddeutsche Faserwerke Gmbh
JPH01246437A (ja) * 1988-03-25 1989-10-02 Mitsui Petrochem Ind Ltd フィラメント等の乾式延伸装置
EP0384886B1 (fr) * 1989-02-24 1993-07-28 Maschinenfabrik Rieter Ag Chambre d'étirage

Also Published As

Publication number Publication date
EP0468918A1 (fr) 1992-01-29
DE59104851D1 (de) 1995-04-13
US5307547A (en) 1994-05-03
JPH0657574A (ja) 1994-03-01

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