EP0143466B2 - Dispositif pour l'étirage de faisceaux de fils synthétiques - Google Patents

Dispositif pour l'étirage de faisceaux de fils synthétiques Download PDF

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Publication number
EP0143466B2
EP0143466B2 EP84114413A EP84114413A EP0143466B2 EP 0143466 B2 EP0143466 B2 EP 0143466B2 EP 84114413 A EP84114413 A EP 84114413A EP 84114413 A EP84114413 A EP 84114413A EP 0143466 B2 EP0143466 B2 EP 0143466B2
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EP
European Patent Office
Prior art keywords
threads
roller
rollers
heating
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP84114413A
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German (de)
English (en)
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EP0143466A3 (en
EP0143466A2 (fr
EP0143466B1 (fr
Inventor
Karl Dr.-Ing. Bauer
Erich Dr.-Ing. Lenk
Michael Dr.-Ing. Hanisch
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Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
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Application filed by Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0143466A2 publication Critical patent/EP0143466A2/fr
Publication of EP0143466A3 publication Critical patent/EP0143466A3/de
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Publication of EP0143466B1 publication Critical patent/EP0143466B1/fr
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Classifications

    • 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
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • 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
    • 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
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass

Definitions

  • the invention relates to a device and a method according to the preamble of claim 1.
  • DE-A-1 946 863 describes forms of training of heated godets, referred to as rollers, of the type known for use on draw twisting machines.
  • Such godets are known as supply mechanisms for individual threads, in particular on drawn twisting machines, and are not suitable for the joint treatment of a thread group composed of up to 1000 and more threads.
  • FR-A-2 444 733 describes a device in which a family of preferably wound elastomer threads are jointly subjected to a heat treatment by passing them over a heated plate.
  • the individual threads of the thread sheet run at a distance from one another through the bores of a thread guide bar, which serves to separate the threads and is provided at both ends of the heated plate.
  • the thread sheet is stopped, the latter is lifted off the heated plate by lifting the two thread guide strips. Delivery mechanisms, between which the thread sheet would be stretched, or bobbin creels are not described.
  • threads drawn off from a creel are combined to form a family of threads, passed over a first roller delivery unit, stretched in a subsequent heating box using an edge or cutting edge and then through further drafting system and a preparation station for further processing.
  • the heating box opens to cool the thread sheet, for example in a water bath.
  • the invention is therefore based on the object to provide means for a device for stretching coulters of synthetic threads on which the threads are heated and stretched together as a thread coulter between a first roller delivery unit and a further roller delivery unit, in order to brake the line of threads to interrupt the flow of heat to the thread sheet.
  • a device for stretching yarn sheets made of synthetic threads on which the yarns drawn off from a creel are heated and stretched together as a yarn sheet between two roller delivery units and in which means are provided on the devices for heating the yarn sheet to slow them down the thread coulter to interrupt the flow of heat to the thread coulter, solved by the fact that a pair of heating rollers with at least one heated roller is provided between the two delivery units, preferably one pair of unheated rollers being assigned to the pair of heating rollers, that one roller of the or each pair of rollers above and the other roller of the roller pair (s) is located below the thread sheet and that the rollers of one roller pair and possibly those of the other roller pair are each movable relative to one another in such a way that they enter the thread sheet from both sides and their path to the S or Z -Form v change, with the arrangement of two pairs of rollers at the end of the respective retracting movement only one pair of rollers is engaged with the thread sheet and the rollers of the second pair
  • devices are provided for this purpose, which enable a relative movement between the entire thread sheet and the heating roller when the drafting system is at a standstill in the sense of lifting off and when restarting in the sense of placing the thread sheet on the heating roller.
  • the heating roller which is in the working position when the thread sheet is running, can be brought out of the action of the thread sheet when the machine is braked.
  • a pair of rollers are used, at least one of which is a heating roller. This pair is advantageously located between the delivery plants.
  • the rollers which are aligned parallel to one another and transversely to the thread sheet, can be inserted into the thread sheet from opposite sides. When viewed from the side, the group of threads is deflected into an S or Z shape.
  • a dancer roller arrangement can be provided within the stretching zone.
  • a similar, but unheated and possibly actively cooled roller pair is advantageously associated with the heated roller pair. Both work together in such a way that the heating roller pair is in contact with this while the coulter is unheated while the coulter is at rest. The movements take place in a coordinated manner, so that the immersing pair of rollers absorbs the slack caused by the extension of the other.
  • the adapted heat supply can be ensured in every operating state.
  • the unheated and, if necessary, cooled roller pair can also be connected to a heating and cooling system together with the initial delivery plant or both delivery plants, it also being possible advantageously for the feed delivery plant to be heated.
  • the uncooled pair of rollers which is only exposed to low operating loads, can be designed in a correspondingly simpler manner.
  • each of the roller pairs is mounted on a respective carrier, namely at the ends thereof, and the carrier is about a pivot axis which is approximately in the middle between the rollers and parallel to them, with a pivot angle of at least 30 and maximum Can be swiveled 180 °.
  • the pivoting movements of the heated and the unheated pair of rollers are coupled to one another and can be directed in opposite directions, with mirror-symmetrical arrangement also in the same direction; they can be started by braking or starting again.
  • the sequence of the pivoting movement of the pair of rollers engaged in each case is controlled depending on the course of the thread coulter tension in such a way that a change in tension is substantially avoided during the change of engagement between the roller pairs assigned to one another.
  • mass-free or low-mass embodiments are proposed, in which the heating rollers themselves are not moved, that is to say the family of threads executes the required relative movement for lifting off the heating roller.
  • a lifting segment is assigned to the stationary heating rollers, which slides between the roller surface and the thread sheet when the machine is at a standstill. It also shields the thread sheet preferably from the heat radiation from the roller and at the same time separates it from it.
  • the lifting segment is adapted to the roller in the form of a jacket and forms with the roller a gap which prevents heat transfer to a sufficient extent.
  • the individual lifting segment has an extent in the circumferential direction which corresponds at least to the wrap angle of the thread sheet and is preferably approximately 4% to 20% larger.
  • the lifting segment is pivotally mounted on the axis of the heating roller itself or eccentrically to it.
  • the thread coulter can partially wrap around the heating roller in the central swivel position of the lifting segment.
  • the lifting segment is preferably pivoted around the heating roller in the direction of travel of the thread sheet in such a way that it lifts the thread sheet from the heating roller and keeps it at a distance from the heating roller during standstill.
  • the lifting segment is pivoted further until it loses engagement with the thread coulter and returns to its neutral position.
  • the swiveling movement of the lifting segment is initiated by its own drive, which is activated when the thread sheet is braked.
  • the pivot axis of the lifting segment is eccentric to the associated roller and in a plane which is determined by the roller axis and the end of the wrap angle.
  • the lifting segment is relatively far away from the heated surface when the thread sheet is running and therefore remains cool, while when swung in the lifting position it comes into a position in which it can be only a short distance from the surface of the roller but pushes between the roller and the thread sheet and separates them from the roller surface.
  • the lifting only leads to an even lower hearing of the thread pulling forces.
  • the minimum distance between the roller surface and the inner surface of the lifting segment should - depending on the general or roller dimensions - be about 0.5 to 2 mm in the lifting position and about 10 to 25 mm in the swung-out position; the latter must ensure that the lifting segment does not heat up too much in the pivoted-out position.
  • This is supported by a structure of the lifting segment, which makes it a heat insulator. It can consist, for example, of a reflection layer, an insulation layer and a wear-resistant thread running layer from the inside to the outside; the edges running transversely to the thread coulter are expediently made of wear-resistant material, since when they first engage the thread coulter they have to endure the relatively high relative movement of the threads as wear-free as possible.
  • the lifting segment is a flat structure, i.e. Cloth, foil, pliable mat or the like. With a finite length and a width that corresponds to the working width of the heated roller.
  • This flexible sheet has good insulating properties.
  • the length of the insulating sheet material should essentially be limited to the outlet path of the thread group so that the heating of the threads starts immediately when the device is restarted.
  • the particular advantage I of this embodiment is above all to be seen in the fact that the fabric practically does not increase the thread tension and is also able without effort to withstand the forces caused by the thread tension.
  • the drive is also very simple, especially since the moving masses are very low.
  • the heating medium is heated outside of the heating device by a suitable heater.
  • a cooling device or preferably a cooling container preferably even a cooled container, is provided which contains enough heating liquid to at least partially fill the heating device and reduce the temperature of the heating device in this way to ensure that the threads are no longer damaged.
  • Valve devices are provided in the heating circuit, which are connected to thread break monitoring directly or via the machine drive and through which the liquid circuit, in which the heating device is switched on, is switched from the heating branch to the cooling branch when the thread breaks or the machine stops.
  • the advantage of this embodiment also lies in the fact that no mechanical parts have to be moved to switch off the heating effect when the machine is at a standstill.
  • the movement of mechanical parts is always associated with considerable vibrations of the machine and also leads to changes in the thread tensile forces acting on the thread group. The threads can get confused.
  • circulation of the actively cooled heating medium can also be provided with constant further cooling.
  • the heating device is only used to fix the stretching point in polyester threads, so it has a temperature that is in the range of 100 °. In this case, a temperature reduction of 20 to 30 ° is already sufficient to prevent damage to the threads, even if the thread is not used for a long time.
  • 3-way valves in front of and behind the heater or the cooling container are preferably used as valve devices.
  • Fig. 1 shows a schematic representation of an embodiment of the device according to the invention.
  • the heating device consists of two rollers 25, which are both heated, parallel to one another and can be pivoted together about a common axis 29 lying in one plane with the two roller axes and running parallel to them.
  • both rollers 25 are rotatably fastened in a frame 27 indicated by levers in the drawing, the axis of rotation 29 of which is the common axis.
  • An unheated, possibly also cooled roller pair 26 is assigned to the heated roller pair 25 and has the same structure. Both pairs of rollers 25 and 26 are installed in the stretching zone between the feed mechanisms 4 and 5. Their frames 27 and 28 either run parallel to one another or are arranged mirror-symmetrically to one another.
  • pivot axes 29 and 30 preferably run in the connecting plane 34 between the two delivery mechanisms 4 and 5, so that in each case one roller 25 or 26 of each pair of rollers can be inserted into the thread sheet 43 from below and the other from above.
  • the heated roller pair 25 engages with it, describing the path 31; the unheated rollers 26 are out of function.
  • the pivoting movement of both pairs of rollers 25, 26 is preferably initiated synchronously with the start of the braking.
  • the heated pair 25 moves out of the thread sheet and at the same time the unheated pair 26 moves in, the path of the thread sheet 1 changing in accordance with the dash-dot line 32.
  • Both paths 32 and 33 have the same length, so that the family of threads remains taut. This process can advantageously be controlled in dependence on the thread coulter tension in such a way that it essentially does not change. If the frames 27 and 28 are arranged in parallel, the pairs of rollers 25, 26 move in opposite directions, and if the arrangement is mirror-symmetrical, their movement is rectified.
  • rollers of the roller pairs 25, 26 can also be arranged independently of one another.
  • a heating roller and a cooling roller are then each below, the associated second rollers above the thread sheet.
  • Such an arrangement requires separate guide and movement mechanisms for each of the rollers 25, 26 and is therefore more complex than that previously described.
  • it offers the possibility of a sensitive control of the thread heating by more or less deep immersion of the rollers in the thread sheet, whereby the respective wrap angle can be changed.
  • FIG. 2 shows an arrangement in which, for illustration, a heating plate underneath the thread sheet 43 brought.
  • the respective inner, the heating plate facing rollers 47 and 48 of the two delivery mechanisms 4 and 5 are assigned in more detail lifting segments which are pushed when braking between the rollers 47 and 48 and the thread sheet 43 and lift them from the heating plate so far that their influence on the thread group becomes insignificant.
  • the heating plate can therefore be stationary.
  • FIGS. 3 and 4 show two different possibilities for assigning the lifting segment 33 to the roller 47 or 48 to be covered.
  • the pivot axis 45 of the lifting segment 33 coincides with the roller axis 50, the lifting segment therefore moves with the same Distance to the roller surface.
  • the covering area 49 of the lifting segment 33 extends beyond the looping area 44 of the thread sheet 43 when it runs over the heating roller 25 or 26.
  • the drawn-out lifting segment 33 has been pushed between the thread sheet 43 and the roller surface and shields the stationary thread sheet 43 against the roller 47 or 48. With the thread sheet running, the lifting segment 33 assumes the position 33A shown in broken lines.
  • the covering area 49 of the lifting segment 33 is dependent on the respective wrap angle or area 44. If possible, it should be about 4% to 20% larger than the wrap angle 44; this is only possible at wrap angles 44 that are smaller than 180 °, but this should be the normal case.
  • FIG. 4 shows an embodiment of the lifting segment 33, in which the pivot axis 46 of the lifting segment 33 lies parallel to the roller axis 50 at a certain distance from it. It is arranged in a plane 35 which is determined by the roller axis 50 and the bisector 35 of the wrap angle 44. It is thereby achieved that the distance 37 between the roller surface and the inside of the lifting segment 33 in the lifting position is smaller than the distance 28 in the position 33A pivoted away (shown in broken lines).
  • the minimum distance 37 which is also determined by the size relationships, is approximately 0.5 to 2 mm in the lifting position and the distance 38 in the pivoted-away position is at least approximately 10 to 25 mm.
  • rollers 47, 48 of FIG. 2 are designed as heating rollers, the action according to the invention of the lifting segment 33 is supported if it is constructed as a heat insulator, as shown in FIG. 5. It consists from the inside to the outside of an inner reflection layer 41, an insulation layer 40 and a wear-resistant thread running layer 39. The edges 42 running transverse to the thread sheet 43 preferably consist of wear-resistant material.
  • the heated roller 60 is shown, which is rotatably supported and driven in bearings, not shown.
  • the roller 60 is partially wrapped around the threads 3 of a thread family.
  • a lever 81 and 82 is freely rotatably mounted on both end faces.
  • Each lever is firmly connected to a gear 83.
  • the gear 83 is driven by gear 84 and swing motor 85.
  • a gear wheel corresponding to 84 and swivel motor corresponding to 85 is therefore also provided for the lever 82. Both motors are started synchronously and with the same phase position in the direction of rotation of the roller 60 when the braking system of the device engages in the event of a thread break.
  • the insulating surface ide 80 is hooked into the hook.
  • the fabric is flexible so that it can adapt to the diameter of the roller 60. It can be a cloth, foil, mat or the like. act. On the one hand, it has the heat resistance in order to be able to endure the temperature of the roller 60. On the other hand, it has good insulating properties in order to prevent or substantially hinder the heat flow from the roller 60 onto the thread sheet.
  • the motors 85 are also started briefly, so that the broad side 88 of the fabric is clamped in the tip of the gap between the thread sheet and the surface of the roller 60 and by the roller 60 or thread sheet 3 is transported further.
  • the hooks 86 and 87 lie outside the roll length and essentially on the radius of the roll 60.
  • the length 89 of the fabric 80 is now dimensioned such that it essentially corresponds to the runout of the thread family. So if the lever 81, 82 retract and clamp the sheet 80 in the gap between the surface of the roller 60 and the thread sheet 3 when the thread breaks and the brake is applied, the sheet is carried so far that it touches the peripheral area touched by the threads completely covers the roller. Otherwise, the length is dimensioned such that when the device is restarted, the heating of the threads, i.e. the direct heat-conducting contact between the roller 60 and the thread sheet starts again at a desired point in time. It may therefore be desirable to make the fabric longer than the loop length of the roller. However, the length of the fabric is preferably limited to the looping length both with regard to the maximum and with regard to the minimum.
  • such a device can also be used with rollers which are wound around from below by the thread sheet, such as with the first roller 60 in the thread path according to FIGS. 7A, 7B.
  • the fabric hangs on the levers 81, 82.
  • the levers 81, 82 By lowering the levers 81, 82, the free one falls Broadside 88 under the force of gravity of the sheet 80 in the gap between the thread sheet 3 and the roller surface and is now clamped and transported on. Then the levers 81, 82 - as in the case described above - are dragged on without a drive.
  • FIGS. 7A and 7B The system for stretching a sheet of threads according to FIGS. 7A and 7B is only shown schematically.
  • a gate 51 there is a variety of e.g. 1000 - supply spools 52, of which the threads 53 run through suitable thread guides, thread tensioners and thread monitors (not shown).
  • the threads are drawn off by the first pair of rollers 54 and then fanned out in groups and passed through nozzle bars 57 lying one above the other in planes.
  • the multifilament threads are each swirled in a so-called "tangle nozzle" in these nozzle bars. This will close the thread, i.e. the cohesion of the individual filaments of each thread is improved and the smoothness and stretchability are improved.
  • an overflow rod 71 is arranged upstream and downstream of each nozzle bar.
  • the overflow rods 71 are connected to the nozzle bar in a manner not shown.
  • the thread family is then fed via a comb 68 to a warp beam 67 of the tree plant 66.
  • lifting segments according to FIGS. 3, 4, 5 or an insulating flat structure according to FIG. 4A are provided for the insulation of the heated rollers 60 at a standstill or that the heated rollers 60 are heated with a liquid and that valve devices are provided by which the heated liquid can be exchanged very quickly for cold liquid, these valve devices being operationally connected to the thread break monitoring of the drawing system.
  • the hot liquid is e.g. Water, since only temperatures up to 100 ° are desired. Water is also suitable as the cold liquid, cold being understood here as a temperature at which the threads lying on the rollers 60 are no longer damaged.
  • the surface speed of the rollers 60 can be set independently of that of the rollers 59 and 65, which is known per se from the stretching technology for plastic threads, in particular polyester threads.
  • the rollers 60 are hollow on the inside and connected to a heating circuit via corresponding slip ring couplings.
  • the heating circuit is fed by the pump 70.
  • a liquid heating medium circulates through the heater 71 and is kept at a constant temperature by appropriate temperature measuring and regulating devices.
  • a possible thread breakage, even of only one of the threads of the thread family, is detected by the thread sensor 72.
  • the solenoid-operated 3-way valves 73 and 74 are changed over in such a way that the heater is removed from the liquid circuit and instead the cooler is switched into the liquid circuit.
  • the cooler can be an active cooler.
  • heating liquid from the cooling container or cooler is now conveyed into the rollers 60. It is sufficient - depending on the heat capacity of the masses and the temperature of the heating roller 60 and the cooling temperature of the liquid conveyed from the cooling container 75 and the desired temperature reduction - that the roller 60 is once filled with the cold liquid.
  • a temperature sensor 76 is provided in the circuit in front of the pump 70, by means of which the drive 77 of the pump 70 is switched off when a desired temperature is reached.
  • the rollers 60 of the delivery mechanism and the heating plate 61 are heated. It can be assumed that depending on the degree of spinning orientation of the delivered threads, the change in length, i.e. the flow between the last roller 60 and the heating plate 61 takes place. It is assumed that the flow zone extends to the heating plate 61. This means that in the case of a standstill undrawn thread material lies both on the heated rollers 60 and on the entrance area of the heating plate 61. For this reason, after the rollers 59, 60 and 65 have come to a standstill, the system is briefly put into operation with the opposite direction of movement, the transmission ratio between all the rollers 59, 60, 65 being switched to 1: 1. This return movement continues until there is no undrawn thread material on a heating device.
  • the delivery mechanisms 60 and 65 are first started up in synchronism, i.e. with a transmission ratio of 1: 1, until the threads, i.e. the flow zone has reached exactly the position in which the standstill occurred.
  • the number of forward rotations of the rollers 60, 65 with the transmission ratio 1: 1 thus corresponds to the number of reverse rotations previously carried out with the transmission ratio 1: 1.
  • the normal operating state is then restored.
  • the warp beam 67 must also take part in the reverse rotation and the forward rotation, its speed being adapted to the permissible thread tension of the thread family.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (13)

1. Dispositif d'étirage de nappes de fils synthéti- ques, avec lequel les fils tirés d'un râtelier de bobines (51) sont échauffés et étirés conjointe- ment en tant que nappe de fils (43), entre un premier mécanisme d'alimentation à rouleaux (4) et un autre mécanisme d'alimentation à rouleaux (5), et dans lequel il est prévu, sur les dispositifs de chauffage de la nappe de fils (43), des moyens pour interrompre le chauffa- ge de la nappe de fils (43) lors du freinage de celle-ci (43),
caractérisé
par le fait qu'une paire de rouleaux de chauffa- ge (25, 25) ayant au moins un rouleau chauffé est prévue entre les deux mécanismes d'alimentation (4, 5), une paire de rouleaux non chauffée (26, 26) par le fait que le premier rouleau (25; 26) de chaque paire de rouleaux (25, 25; 26, 26) se trouve au-dessus et l'autre rouleau (25; 26) les paires de rouleaux (25, 25; 26, 26) au-dessous de la nappe de fils,
et par le fait que les rouleaux de chaque paire de rouleaux (25, 25; 26, 26) sont à chaque fois mobiles l'un par rapport à l'autre de manière que, des deux côtés, un rouleau puisse être engagé dans la nappe de fils (43) et que le trajet de la nappe de fil puisse être modifié de manière à être mis à une forme en S ou en Z, seule une paire de rouleaux (25, 25; 26,26) étant en prise avec la nappe de fils (43) à la fin du mouvement d'engagement, les rouleaux de la deuxième paire de rouleaux (26, 26; 25, 25) ne touchant alors pas la nappe de fils (43), et
par le fait que c'est la paire de rouleaux de chauffage (25, 25) ou la paire de rouleaux non chauffée (26, 26) qui est en condition d'engagement avec la nappe de fils (43), respective- ment selon que cette dernière est en marche ou freinée
2. Dispositif selon revendication 1,
caractérisé
par le fait que les mouvements des deux paires de rouleaux (5, 6; 7, 8) sont mutuellement couplés, s'effectuent en opposition et sont initialisables par le freinage ou la remise en marche de la nappe de fils (1).
3. Dispositif selon revendication 2,
caractérisé
par le fait que le déroulement du mouvement de la paire de rouleaux (5, 6; 7, 8) se trouvant à chaque fois en condition d'engagement peut être commandé en fonction de l'évolution de la tension des fils, de manière à éviter sensible ment une variation de tension pendant le changement de condition d'engagement.
4. Dispositif selon l'une des revendications 1 à 3,
caractérisé
par le fait que la paire de rouleaux chauffée et/ou non chauffée est agencée sur un dispositif-support (cadre 27, 28), lequel peut pivoter de 30 à 180° autour d'un axe (29,30) situé entre les rouleaux et parallèle à ceux-ci.
5. Dispositif d'étirage de nappes de fils synthétiques, avec lequel les fils tirés d'un râtelier de bobines (51) sont échauffés et étirés conjointe- ment en tant que nappes de fils (43), entre un premier mécanisme d'alimentation à rouleaux (4) et un autre mécanisme d'alimentation à rouleaux (5), et dans lequel il est prévu, sur les dispositifs de chauffage de la nappe de fils (43), des moyens pour interrompre le flux de chaleur allant à la nappe de fils (43) lors du freinage de celle-ci (43),
caractérisé
par le fait qu'il est prévu, en tant que moyens pour interrompre le flux de chaleur entre rouleau chauffé (25; 60) et nappe defils (1) pendant l'arrêt de la nappe de fils (1), un segment décolleur (15) dont l'étendue (29) en direction circonférentielle du rouleau recouvre au moins le domaine angulaire de contact (25) de la nappe de fils (1) et est de préférence d'environ 40 à 20° plus grande que ce domaine, ledit segment pouvant pivoter autour d'un axe parallèle à l'axe du rouleau, et par le fait
que l'axe de pivotement (26) du segment décolleur (15) est disposé excentriquement (18) par rapport au rouleau conjugué (5, 6; 27, 28) et se trouve dans un plan qui est déterminé par l'axe du rouleau et par la bissectrice (17) de l'angle de contact (25).
6. Dispositif selon revendication 5,
caractérisé
par le fait que, dans la position de décollage (19), l'intervalle minimal (19; 20) entre le segment décolleur (15) et la surface périphérique du rouleau vaut 0,5 mm à 2 mm et, dans la condition écartée par pivotement (20) vaut environ 10 mm à 20 mm.
7. Dispositif selon l'une des revendications 5 à 6,
caractérisé
par le fait que le segment décolleur (15) est construit en tant qu'isolateur thermique et est constitué de préférence, de l'intérieur vers l'extérieur, par au moins une couche réfléchissan- te (23), une couche isolante (22) et une couche résistante à l'usure (21) pour le passage de fil.
8. Dispositif selon l'une des revendications 5 à 7,
caractérisé
par le fait qu'un rouleau-danseur est prévu pour compenser fluctuations de tension et/ou les variations de longeur des fils, dans la région entre le mécanisme d'alimentation d'entrée (2) et le mécanisme d'alimentation de (sortie (3).
9. Dispositif selon la revendication 5
caractérisé
par le fait que le segment décolleur est un organe surfacique isolant, souple en flexion, qui est tiré entre la nappe de fils et les moyens de chauffage lorsque le dispositif est arrêté.
10. Dispositif d'étirage de nappes de fils synthétiques, avec lequel les fils tirés d'un râtelier de bobines (51) sont échauffés et étirés conjointe- ment en tant que nappes de fils (43), entre un premier mécanisme d'alimentation à rouleaux (4) et un autre mécanisme d'alimentation à rouleaux (5), et dans lequel il est prévu, sur les dispositifs de chauffage de la nappe de fils (43), des moyens pour interrompre le flux de chaleur allant à la nappe de fils (43) lors du freinage de celle-ci (43),
caractérisé
par le fait que les rouleaux de chauffage (60) sont chauffés par l'intermédiaire de liaisons par conduites allant à des moyens de chauffage (71) pour un fluide de chauffage liquide, prévus en dehors des rouleaux de chauffage et par le fait qu'un récipient de refroidissement (75) contenant un fluide de chauffage froid est monté en parallèle des moyens de chauffage (71), cela par l'intermédiaire de moyens de vanne, de préférence par une vanne à trois voies, et par le fait que les moyens de vanne peuvent être positionnés sous la dépendance d'un dispositif de surveillance de rupture de fil, de manière que du fluide chauffant froid soit amené dans les rouleaux de chauffage (60), en cas de rupture de fil.
11. Dispositif selon revendication 10,
caractérisé
par le fait que la pompe dans le circuit de liquide est agencée en avant des branches du circuit contenant l'organe de chauffage et le récipient de refroidissement.
12. Dispositif selon revendication 11, caractérisé
par le fait qu'un capteur de température pénètre dans le circuit de liquide en amont de la pompe,
et par le fait que la pompe peut être inactivée en fonction de la température.
13. Procédé d'arrêt d'un dispositif selon l'une des revendications 1, 5 ou 10,
caractérisé
par le fait que les mécanismes d'alimentation à rouleaux (4, 5) sont freinés jusqu'à l'arrêt,
et par le fait que le premier mécanisme d'alimentation (4) est alors mis en rotation rétrograde de quelques tours, de manière que la longueur de fil non étirée ayant déjà franchi les moyens de chauffage soit ramenée en amont de ces derniers, les mécanismes d'alimentation suivants (5) étant mis en mode de rotation libre ou étant, de préférence, également tournés dans le sens rétrograde avec un rapport de transmission de 1:1.
EP84114413A 1983-12-01 1984-11-28 Dispositif pour l'étirage de faisceaux de fils synthétiques Expired - Lifetime EP0143466B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3343499 1983-12-01
DE3343499 1983-12-01
DE3406937 1984-02-25
DE3406937 1984-02-25

Publications (4)

Publication Number Publication Date
EP0143466A2 EP0143466A2 (fr) 1985-06-05
EP0143466A3 EP0143466A3 (en) 1987-11-11
EP0143466B1 EP0143466B1 (fr) 1991-07-03
EP0143466B2 true EP0143466B2 (fr) 1994-06-01

Family

ID=25816059

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84114075A Withdrawn EP0150301A2 (fr) 1983-12-01 1984-11-22 Dispositif d'étirage de faisceaux de fils synthétiques
EP84114413A Expired - Lifetime EP0143466B2 (fr) 1983-12-01 1984-11-28 Dispositif pour l'étirage de faisceaux de fils synthétiques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84114075A Withdrawn EP0150301A2 (fr) 1983-12-01 1984-11-22 Dispositif d'étirage de faisceaux de fils synthétiques

Country Status (3)

Country Link
US (4) US4630340A (fr)
EP (2) EP0150301A2 (fr)
DE (1) DE3484767D1 (fr)

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EP0150301A2 (fr) * 1983-12-01 1985-08-07 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Dispositif d'étirage de faisceaux de fils synthétiques
DE3504077A1 (de) * 1984-02-25 1985-10-10 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Vorrichtung zum heizen von fadenscharen aus synthetischen faeden
FR2618169B1 (fr) * 1987-07-15 1990-01-05 Bene Madinox Dispositif permettant le deblocage automatique du tissu dans les machines a teindre en boyau.
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US4630213A (en) * 1983-09-30 1986-12-16 E. I. Du Pont De Nemours And Company Method of reducing throughput of spinning pumps
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Also Published As

Publication number Publication date
US4905355A (en) 1990-03-06
US4814122A (en) 1989-03-21
EP0150301A2 (fr) 1985-08-07
EP0143466A3 (en) 1987-11-11
DE3484767D1 (de) 1991-08-08
EP0143466A2 (fr) 1985-06-05
US4630340A (en) 1986-12-23
EP0143466B1 (fr) 1991-07-03
US4868959A (en) 1989-09-26

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