EP0150301A2 - Dispositif d'étirage de faisceaux de fils synthétiques - Google Patents

Dispositif d'étirage de faisceaux de fils synthétiques Download PDF

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Publication number
EP0150301A2
EP0150301A2 EP84114075A EP84114075A EP0150301A2 EP 0150301 A2 EP0150301 A2 EP 0150301A2 EP 84114075 A EP84114075 A EP 84114075A EP 84114075 A EP84114075 A EP 84114075A EP 0150301 A2 EP0150301 A2 EP 0150301A2
Authority
EP
European Patent Office
Prior art keywords
thread
roller
heating
rollers
thread sheet
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.)
Withdrawn
Application number
EP84114075A
Other languages
German (de)
English (en)
Inventor
Karl Dr.-Ing. Bauer
Erich Dr.-Ing. Lenk
Michael Dr.-Ing. Hanisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Barmag AG
Original Assignee
Barmag Barmer Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25816059&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0150301(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Barmag Barmer Maschinenfabrik AG filed Critical Barmag Barmer Maschinenfabrik AG
Publication of EP0150301A2 publication Critical patent/EP0150301A2/fr
Withdrawn legal-status Critical Current

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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 for stretching sheets of threads, preferably made of synthetic threads, on which the threads are heated and stretched between a first supplying unit and one or two further supplying units and then wound up, z-R warmed.
  • the object of the invention is to avoid damage to the threads due to overheating on heated rollers of the drafting system when the thread breaks and the machine then comes to a standstill.
  • a device of the type described in the introduction in which heated rollers and devices are provided in the drawing zone for heating the thread sheet, as well as devices which provide a relative movement between the entire thread sheet and the heating roller when the drafting device is at a standstill in the sense of lifting and restarting enable 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 action on 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 arranged 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 assigned to 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 swell created by the extension of the other.
  • the adapted can be used in any operating state Heat supply can be ensured.
  • 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 roller pair 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 swiveling 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 in engagement depending on the course of the thread coulter tension is controlled 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 a further embodiment of the invention, in which the heating rollers themselves are not moved, that is, the thread family performs 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 pivoted on the axis of the heating roller itself or eccentrically to it. In the central swivel position of the lifting segment, the thread sheet can partially wrap around the heating roller.
  • the lifting segment is preferably pivoted around the heating roller in the running direction 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 put into operation 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 it comes into a position when it is pivoted into the lifting position, in which it can be only a short distance from the surface of the roller but pushes between the roller and thread sheet and separates them from the roller surface.
  • the lifting only leads to an even smaller increase in the thread tensile 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 the construction of the lifting segment, which makes it a heat insulator. It can consist, for example, of a reflection layer, an insulating layer and a wear-resistant thread running layer from the inside out; the edges running across the sheet are expediently made of wear-resistant material, since the first time you use the thread coulter you have to endure the relatively high relative movement of the threads as wear-free as possible.
  • lifting segments of this type can also be used to lift the thread sheet from a heating plate.
  • 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 comes to a standstill.
  • 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 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 sheet. The threads can get confused.
  • the heating device Depending on the operating temperature of the heating device on the one hand and the temperature of the cooled heating medium in the cooling container or the cooling device, a single filling of the heating device with the cold heating medium is sufficient. However, circulation of the actively cooled heating medium can also be provided with constant further cooling. If e.g. the heating device only serves to fix the stretching point in polyester threads, so it has a temperature which 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 upstream and downstream of the heater or the cooling container are preferably used as valve devices.
  • the elongation occurs when a synthetic thread, in particular a thread made of polyester and polyethylene terephthalate, is stretched in a narrow range in the longitudinal direction.
  • the length of this area depends on the spinning orientation of the thread.
  • a so-called. named bottle neck of a few millimeters in length.
  • flow zones of greater length are formed.
  • the change in length only occurs after the threads overflow over the heating device, be it godet, be it a hot pen or be it a hot plate.
  • a method is also proposed as an embodiment in which, in the event of a thread breakage, the thread transport devices, ie. Delivery and drafting units are braked to a standstill and then moved back so far that one stretched Thread length, i.e. such thread material comes into contact with the heating device at a standstill, which lies behind the flow zone in the thread running direction. After braking the thread run, an impermissibly long-lasting contact between the undrawn threads and the heating device is avoided in that stretched thread pieces are moved back into the contact area of the heating device.
  • the thread transport devices ie. Delivery and drafting units are braked to a standstill and then moved back so far that one stretched Thread length, i.e. such thread material comes into contact with the heating device at a standstill, which lies behind the flow zone in the thread running direction.
  • Drawn pieces of thread can withstand the temperatures normally required for drawing for a longer period of time, in particular until the fault has been eliminated without damage. In particular, it could not be ascertained that the stretched thread areas which had been in prolonged contact with the heating device showed a significantly different dyeability.
  • This solution also has the particular advantage that the heating devices, in particular heating rollers, can remain stationary and changes in the thread tension are avoided. It should be pointed out in particular that the measure proposed here can advantageously also be used in conjunction with the measures previously described in the context of this application, if it turns out that, despite the measures, the family of threads is still exposed to temperatures that the threads do not in the undrawn state can endure without the risk of harm.
  • Fig. 1 shows a schematic representation of an embodiment of the device according to the invention.
  • the heating device consists of two rollers 25, both of which are heated, parallel to one another and pivotable 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 mounted in a frame 27 indicated by levers in the drawing, the axis of rotation 11 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.
  • Both ways 32 and 33 have the same length, so that the thread group 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 located 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 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 a heating plate is attached below the thread sheet 43.
  • the respective inner rollers 7 and 8 of the two delivery mechanisms 4 and 5 facing the heating plate are assigned lifting segments which are explained in more detail below and which are pushed when braking between the rollers 47 and 48 and the thread sheet 43 and lift them off the heating plate to such an extent 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 the assignment of the lifting segment 33 to the roller 47 and 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 depends on the respective wrap angle or area 44. If possible, it should be about 4% to 20% larger than the wrap angle 44; although this is only possible at wrap angles 44 that are smaller than 180 °, 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. This ensures 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 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.
  • FIGS. 7a and 7b The system for stretching a thread sheet according to FIGS. 7a and 7b is only shown schematically.
  • 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. In these nozzle bars, the multifilament threads are each swirled in a so-called "tangle nozzle". 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 41 is arranged upstream and downstream of each nozzle bar.
  • the overflow rods are connected to the nozzle bar in a manner not shown.
  • the family of threads is then fed via a comb 68 to a warp beam 67 of the tree plant 66.
  • the heated rollers 60 are heated with a liquid and that valve devices are provided through which the heated liquid can be exchanged very quickly for cold liquid, these valve devices being operationally connected to the yarn breakage 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. Any 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 one Act 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, ie 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, now after If the rollers 59, 60 and 65 are at a standstill, the system is briefly started up 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 put into operation in synchronism, ie with a transmission ratio of 1: 1, until the threads, ie the flow zone, exactly the position again reached when 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)
EP84114075A 1983-12-01 1984-11-22 Dispositif d'étirage de faisceaux de fils synthétiques Withdrawn EP0150301A2 (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 (1)

Publication Number Publication Date
EP0150301A2 true EP0150301A2 (fr) 1985-08-07

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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 After (1)

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

Country Status (3)

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

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO1989000620A1 (fr) * 1987-07-17 1989-01-26 Viscosuisse Sa Procede de pre-retordage d'un fil alimenteur synthetique multifilament et fil ainsi produit
DE3909348C1 (fr) * 1989-03-22 1990-05-10 Karl Mayer Textilmaschinenfabrik Gmbh, 6053 Obertshausen, De
WO1991009999A1 (fr) * 1989-12-29 1991-07-11 E.I. Du Pont De Nemours And Company Perfectionnements apportes a des fils industriels polyester haute resistance

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DE3328449C2 (de) * 1983-08-06 1986-02-27 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Vorrichtung zum Strecken und Schären von thermoplastischen Kettfäden
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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US5590447A (en) * 1995-10-06 1997-01-07 Milliken Research Corporation Continuous process from interlacing to warping to provide a heather yarn
US5682656A (en) * 1996-02-29 1997-11-04 Milliken Research Corporation Continuous process to wrap entangled yarn
US6301760B1 (en) 2000-02-14 2001-10-16 Guilford Mills, Inc. Method of selectively altering physical properties of an elastane filament
DE10110928B4 (de) * 2001-03-07 2006-06-14 OCé PRINTING SYSTEMS GMBH System zum Drucken oder Kopieren mit einer Vorrichtung zum einfachen Austauschen von Bauteilen in bahnverarbeitenden Maschinen
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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
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
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000620A1 (fr) * 1987-07-17 1989-01-26 Viscosuisse Sa Procede de pre-retordage d'un fil alimenteur synthetique multifilament et fil ainsi produit
DE3909348C1 (fr) * 1989-03-22 1990-05-10 Karl Mayer Textilmaschinenfabrik Gmbh, 6053 Obertshausen, De
US5012563A (en) * 1989-03-22 1991-05-07 Karl Mayer Textilmaschinenfabrik Gmbh Stretching arrangement for stretching of plastic threads
WO1991009999A1 (fr) * 1989-12-29 1991-07-11 E.I. Du Pont De Nemours And Company Perfectionnements apportes a des fils industriels polyester haute resistance
US5173231A (en) * 1989-12-29 1992-12-22 E. I. Du Pont De Nemours And Company Process for high strength polyester industrial yarns

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Publication number Publication date
EP0143466B2 (fr) 1994-06-01
EP0143466A3 (en) 1987-11-11
US4814122A (en) 1989-03-21
US4630340A (en) 1986-12-23
EP0143466B1 (fr) 1991-07-03
US4868959A (en) 1989-09-26
EP0143466A2 (fr) 1985-06-05
US4905355A (en) 1990-03-06
DE3484767D1 (de) 1991-08-08

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