EP0237892B1 - Procédé et dispositif pour rebobiner des fils - Google Patents

Procédé et dispositif pour rebobiner des fils Download PDF

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Publication number
EP0237892B1
EP0237892B1 EP87103271A EP87103271A EP0237892B1 EP 0237892 B1 EP0237892 B1 EP 0237892B1 EP 87103271 A EP87103271 A EP 87103271A EP 87103271 A EP87103271 A EP 87103271A EP 0237892 B1 EP0237892 B1 EP 0237892B1
Authority
EP
European Patent Office
Prior art keywords
thread
length
feeder
weight
process according
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
EP87103271A
Other languages
German (de)
English (en)
Other versions
EP0237892A1 (fr
Inventor
Rudolf Jenny
Bruno Traber
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.)
Schweiter Maschinenfabrik AG
Original Assignee
Schweiter 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
Application filed by Schweiter Maschinenfabrik AG filed Critical Schweiter Maschinenfabrik AG
Publication of EP0237892A1 publication Critical patent/EP0237892A1/fr
Application granted granted Critical
Publication of EP0237892B1 publication Critical patent/EP0237892B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B65H59/24—Surfaces movable automatically to compensate for variation in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/385—Regulating winding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/084—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to a predetermined weight of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a method for rewinding a thread and a device for performing this method.
  • the thread When rewinding a thread, for example from a spinning cop to a winding spool, the thread is laid by a thread laying unit on the surface of the spool.
  • the winding spool is driven by a drive motor.
  • Production output can be increased by increasing the wind-up speed without increasing the number of thread breaks. However, if the winding speed exceeds a certain limit, the number of thread breaks increases and this results in the upper limit of the production output. The higher the winding speed, the greater the tension in the thread. This explains the increase in thread breaks as the wind speed increases.
  • the winding speed is kept constant, it can be observed that the thread tension at the start of the winding of a template is small. Then the thread tension slowly increases and towards the end of the rewinding process it rises steeply. In order to prevent thread breaks from occurring in the final phase of the rewinding process, the winding speed is reduced during the entire rewinding process in such a way that during the final phase of the rewinding process, which is significantly shorter than the preceding period of rewinding, there are as far as possible no thread breaks. However, this has the consequence that the rewinding actually takes place slowly during the larger rewinding period mentioned. In order to increase the production output, the pulling speed of the thread from the template (from the spinning cop) should be high. Because of the structure characteristics of spinning cops, the running speed of the thread at the beginning of the bobbin (full bobbin) and thus the thread tension cannot be chosen too high, since otherwise entire layers (loops) of thread will be pulled off.
  • the winding speed should be able to be changed while the thread is being pulled off a template or spinning cop, so that the thread tension during the entire rewinding process is as close as possible, but below a limit above which thread breaks frequently occur.
  • Influencing variables are, for example, the thread speed and the thread tension.
  • the size of the thread tension can be controlled as a function of the wind-up time by means of a corresponding program, on the diameter of the wind-up spool, on the winding-off time or on a combination of these sizes.
  • the object of the present invention is to propose measures which make it possible to increase the production output beyond the previously usual limit.
  • the device shown for rewinding a thread contains a first spool 1, which is also called a template or spinning cop here and from which the thread 2 is drawn off.
  • the thread 2 then passes to a second spool 3, which is also referred to here as a winding spool.
  • a thread laying unit 4 Between these two bobbins 1 and 3 there is a thread laying unit 4, by means of which the thread 2 is laid on the surface of the winding spool 3.
  • This thread laying unit 4 can contain, for example, a grooved drum or a thread guide. In the illustrated embodiment of the device, the thread laying unit 4 has a grooved drum 14.
  • the winding spool 3 is connected to a drive motor 5.
  • the shaft of the winding spool 3 can be connected to the motor 5.
  • winding spool 3 can also be driven on its circumference by a drive roller 6 or the grooved drum 14.
  • the speed of the engine is regulated by a speed controller 7, which is connected to an electronic control unit 8.
  • This can contain a microprocessor, which can control the processes in this facility according to the program.
  • a thread tension meter 9 On the path through which the thread 2 passes between the spinning cop 1 and the thread laying unit 4, there is a thread tension meter 9 and an electrically actuable thread braking device 10.
  • the knife 9 supplies the control unit 8 with information about the tension in the wound thread 2 and the brake 10 can be activated by the control unit 8 if necessary.
  • a thread length meter 11 is provided for the continuous measurement of the length of the thread length unwound from the template 1. In order to control the speed of winding the thread, it is in fact necessary to know as precisely as possible in each instant of the winding process how long the length of the thread still on the spinning cop 1 is.
  • the template 1, from which the thread 2 is withdrawn, is located in a first station 16 of the device, which is also called the main station here.
  • the spinning cop 1 shown in this main station 16 has a winding 19 which is located on a sleeve 18. A certain length of thread 2 has already been drawn off from the winding 19 of this spinning cop 1.
  • This illustration of spinning cops 1 shows a possible state of the winding 19 during the operation of the present device.
  • This device is designed such that it also allows a spinning cop 1 to be introduced and processed in the main station 16, in which a section of the winding 19 has already been pulled off, in which the bobbin 19 has not been fully wound up, in which the Bobbin 19 has not been properly wound up or the like.
  • a further station 17 of the device which is also called a ballast station here, is connected upstream of the main station 16 mentioned.
  • This ballast station 17 is intended for the temporary reception of a further spinning cop 13. It is a spinning cop 13 which is exchanged for the empty tube 18 in the main station 16 after the thread 2 has been drawn off from the first spinning cop 1 in the main station 16.
  • this ballast station 17 there is a first load cell 12 on which the second template 13 rests. The output of this load cell 12 is connected to the control unit 8.
  • a further load cell 15 can be located in the main station 16, the first template 1 then resting on this second load cell 15.
  • the basic idea of this invention is to control the size of the rewinding speed in such a way that the thread tension remains as constant as possible while the thread is being pulled off a spinning cop, and that this thread tension is at the same time as close as possible to a limit above which thread breaks frequently occur.
  • the value of the thread tension which represents the mentioned tension limit, is an empirical value and is known for the respective thread type. It is also known that there is a directly proportional relationship between the thread speed and the thread tension, i.e. that the thread tension increases with increasing speed. In order to be able to achieve the task set in the present case, the control unit 8 must adjust the thread speed, i.e. keep the take-off speed of the thread 2 in the range below the tension limit value and control it in such a way that the thread tension does not reach the tension limit value.
  • the diameter and the quality properties of the thread 2 to be rewound which are relevant in the present case, are known in advance or at least can be determined easily.
  • the weight of the sleeve 18 is also known in advance. From the weight of spinning cops 1 and 13, one can deduce the length of the thread to be wound. This weight is determined in the ballast station 17 by the load cell 12 and delivered to the control unit 8. This stores this weight until the start of the withdrawal of the thread 2 from the spinning cop 13.
  • the thread length meter 11 is set to zero at the beginning of the withdrawal of the thread 2 by a spinning cop 1, 13 and so on, and during the withdrawal of the thread it then continuously provides the information about the Length of the thread already drawn off.
  • the empty sleeve 18 is removed from the latter.
  • the next template 13 is brought from the upstream station 17 into the main station 16, the thread length sensor 11 is set to zero and the rewinding process can start based on the stored weight of the template 13.
  • the winding speed can be program-controlled and changed depending on the remaining thread length still on the template 1.
  • the rewinding speed can be selected to be high during the first and longer rewinding phase mentioned above and is only reduced towards the end of the rewinding process in order to prevent thread breaks from occurring in this phase. There is no increased number of thread breaks, even if the length of the thread 2 forming the winding 19 deviates significantly from the usual thread length in the winding 19.
  • the control unit 8 can also be designed in such a way that it enables an optimization of the rewinding process when a number of threads containing the same quality are spooled. This further possibility for increasing the production output is that the conditions of the rewinding process are optimized with an increasing number of rewound spinning bobbins. This can be achieved by detecting the length of the thread drawn from the first spinning cops and assigning it to the respective remaining length. Any thread breaks that occur are detected, for example by the thread length sensor 11, detected by the control unit 8 and assigned to that length or that length range of the thread in which they occurred.
  • the speed at which the thread will be rewound in this length range during the treatment of the subsequent spinning heads is corrected. This correction is made against the lower winding speeds if thread breaks occurred, and it is made upwards if no thread breaks have previously occurred with this thread length. With an increasing number of treated spinning cops, a better approximation to the mentioned limit tension in the thread can be achieved.
  • the total length of the thread can be divided into a number of partial lengths.
  • Each of these partial lengths is assigned a winding speed which resulted from the treatment of the preceding spinning cops. With this subdivision into partial lengths, the approximation to the winding speed limit in the thread is not optimal, but the required outlay on equipment in the rewinding device is smaller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (10)

1. Procédé de rebobinage d'un fil, caractérisé en ce que la vitesse de bobinage est modifiée en fonction de la longueur du fil restant encore sur la bobine (1).
2. Procédé selon la revendication 1, caractérisé en ce que la longueur du fil restant est calculée à partir de la différence entre la longueur totale du fil sur l'alimentation et la longueur déjà déroulée du fil.
3. Procédé selon la revendication 2, caractérisé en ce que la longueur totale du fil sur une alimentation est calculée à partir du poids du fil alimenté et un facteur de calcul longueur par poids de fil.
4. Procédé selon la revendication 3, caractérisé en ce que le poids du fil alimenté est calculé à partir de la différence entre le poids de l'alimentation pleine (1) et le poids de la bobine d'alimentation vide (18).
5. Procédé selon la revendication 3, caractérisé en ce que le poids du fil alimenté est calculé à partir de la différence entre le poids de l'alimentation (13) à utiliser en prochain et le poids de la bobine d'alimentation (18) enlevée à chaque changement d'alimentation.
6. Procédé selon la revendication 3, caractérisé en ce que le facteur de calcul longueur par poids de fil résulte du calcul du poids du fil alimenté respectivement avec la longueur de fil déroulé respectivement et que la valeur sur laquelle est basée ce facteur résulte de la communication de valeurs déterminées pendant des traitements d'alimentation qui ont déjà été effectués.
7. Procédé selon la revendication 1, caractérisé en ce que la modification de la vitesse de bobinage est effectuée conformément à un programme.
8. Procédé selon la revendication 1, caractérisé en ce que la longueur du fil déroulé est déterminée et est attribuée à la longueur restante respectivement, en ce que des ruptures du fil pouvant se produire sont détectées et sont attribuées aux longueurs ou aux zones de longueur du fil dans lesquelles elles se sont produites, et qu'à l'appui de la fréquence des ruptures du fil produites la vitesse de bobinage pour cette zone de longueur est corrigée, pour arriver à une production performante optimisée dans les cycles de dévidage suivants.
9. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comprenant une base (16) pour le montage d'une alimentation (1) à partir de laquelle le fil (2) est dévidé, une bobine d'enroulement (3) pour le fil déroulé, avec un moteur d'entraînement (5) pour la bobine d'enroulement ainsi qu'une unité de commande (8), caractérisé en ce qu'une base (17) est disposée avant la base (16) pour l'alimentation qui vient d'être utilisée, où se trouve une autre alimentation (13), de laquelle le fil (1) sera déroulé seulement ultérieurement, et en ce que dans cette base disposée avant l'autre (17) est installé un dispositif de pesée (12) pour l'alimentation s'y trouvant (13), et en ce que le dispositif est muni d'un capteur de longueur de fil (11) pour mesurer de manière continue la longueur de fil déroulée de l'alimentation (1 ).
10. Dispositif selon la revendication 9, caractérisé en ce que la base principale (16) où se trouve l'alimentation (1) utilisée, est munie d'un dispositif de pesée (15).
EP87103271A 1986-03-17 1987-03-07 Procédé et dispositif pour rebobiner des fils Expired - Lifetime EP0237892B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1073/86A CH669177A5 (de) 1986-03-17 1986-03-17 Verfahren und einrichtung zum umspulen eines fadens.
CH1073/86 1986-03-17

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP89115347A Division EP0350081A3 (fr) 1986-03-17 1987-03-07 Méthode et dispositif pour rebobiner des fils textiles
EP89115347.0 Division-Into 1989-08-19

Publications (2)

Publication Number Publication Date
EP0237892A1 EP0237892A1 (fr) 1987-09-23
EP0237892B1 true EP0237892B1 (fr) 1990-08-08

Family

ID=4201821

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87103271A Expired - Lifetime EP0237892B1 (fr) 1986-03-17 1987-03-07 Procédé et dispositif pour rebobiner des fils
EP89115347A Withdrawn EP0350081A3 (fr) 1986-03-17 1987-03-07 Méthode et dispositif pour rebobiner des fils textiles

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89115347A Withdrawn EP0350081A3 (fr) 1986-03-17 1987-03-07 Méthode et dispositif pour rebobiner des fils textiles

Country Status (5)

Country Link
US (1) US4768728A (fr)
EP (2) EP0237892B1 (fr)
JP (1) JP2617305B2 (fr)
CH (1) CH669177A5 (fr)
DE (1) DE3764124D1 (fr)

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ITVR20130108A1 (it) * 2013-05-10 2014-11-11 Riccardo Pallavidini Dispositivo per la lavorazione di fili o filati di fibre tessili
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CN114426222B (zh) * 2022-01-25 2024-04-09 无锡市鼎麒新材料科技有限公司 一种展宽经纱恒张力放卷的实时扭矩计算方法
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EP0350081A2 (fr) 1990-01-10
CH669177A5 (de) 1989-02-28
JP2617305B2 (ja) 1997-06-04
EP0237892A1 (fr) 1987-09-23
US4768728A (en) 1988-09-06
DE3764124D1 (de) 1990-09-13
JPS62218370A (ja) 1987-09-25
EP0350081A3 (fr) 1990-01-17

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