WO2001034891A1 - Procede et dispositif de fabrication d'un article tricote, et appareil d'alimentation en fil pour une machine a tricoter ou pour une machine de production de fil - Google Patents

Procede et dispositif de fabrication d'un article tricote, et appareil d'alimentation en fil pour une machine a tricoter ou pour une machine de production de fil Download PDF

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Publication number
WO2001034891A1
WO2001034891A1 PCT/DE2000/003639 DE0003639W WO0134891A1 WO 2001034891 A1 WO2001034891 A1 WO 2001034891A1 DE 0003639 W DE0003639 W DE 0003639W WO 0134891 A1 WO0134891 A1 WO 0134891A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
speed
yarn
tension
delivery device
Prior art date
Application number
PCT/DE2000/003639
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Hepp
Original Assignee
Memminger-Iro Gmbh
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
Priority claimed from DE10005101A external-priority patent/DE10005101A1/de
Application filed by Memminger-Iro Gmbh filed Critical Memminger-Iro Gmbh
Priority to AU19941/01A priority Critical patent/AU1994101A/en
Publication of WO2001034891A1 publication Critical patent/WO2001034891A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/488—Thread-feeding devices in co-operation with stitch-length-regulating mechanism
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles

Definitions

  • Method and device for producing a knitted or knitted fabric and a thread delivery device for a knitting or knitting machine or yarn production machine
  • the invention relates to a method and a device for producing a knitted or knitted fabric as well as a thread delivery device according to the preamble of claims 1, 8 and 12 respectively.
  • Knitting machines for the production of higher quality stockings and bodysuits are regularly equipped with several thread delivery devices.
  • a thread can be delivered to a knitting point, for example, with adjustable thread tension.
  • a knitting machine has e.g. B. over four knitting points, the mesh sizes of which are adjustable via knitting locks.
  • the same thread tensions for example, have previously been specified using the thread delivery devices and the same thread consumption has been set via the position of the knitting locks, which determines the stitch size of a row of knitting, when producing a single-surface, smooth knitwear.
  • This setting is regularly carried out manually, i. H. An operator checks the properties of a knitted fabric, counts the rows of stitches in the event of inhomogeneities and adjusts the relevant knitting lock accordingly.
  • External thread consumption measuring devices are also used, through which a thread running into the knitting machine is looped.
  • such measurements are associated with not inconsiderable measurement inaccuracies and possibly an undesirable influence on the structure of a knitted fabric that is already being produced.
  • Both setting methods also require a comparatively large amount of time, which reduces the productivity of the knitting machines.
  • EP 950 742 A2 discloses a device for controlling the thread feed to a textile machine, such as a knitting machine.
  • This device comprises means for adjusting the thread tension and means for measuring the thread speed.
  • the means for setting and measuring are connected to control means which are able to precisely specify the voltage and the speed.
  • a closed control loop is implemented, in which either the thread tension or the thread speed is predetermined and by adjusting organs for Setting the mesh size the other size (tension or speed) is regulated to the desired value.
  • the coordination of two pair parameters that are related to each other is associated with a relatively large technical effort.
  • the invention has for its object to enable the production of a high quality knitted or knitted fabric, in particular without ringing, with comparatively less technical effort.
  • the invention is initially based on a method for producing a knitted or knitted fabric with a plurality of threads on a knitting or knitting machine with organs for adjusting the stitch size and with thread delivery devices for at least some of the threads, which are designed for measuring and regulating the thread tension, the speed of the threads being adjusted by a device for specifying the thread speed in order to regulate the thread tension.
  • the main idea of the invention is that, in accordance with the activation of the device for specifying the thread speed of a selected thread supply device, which results from the thread tension measured on this thread supply device, the devices for specifying the thread speed of all remaining thread supply devices are controlled.
  • a "master" thread delivery device is defined, the control of which the device for specifying the thread speed on the Devices for thread speed specification of all other "slave” thread delivery devices is mapped.
  • the threads on all thread delivery devices thus have the same speed, which means that the thread consumption is also the same for non-elastic threads. If an essentially identical thread speed with the same thread tension has already been set in advance of the actual manufacturing process by changing the organs for adjusting the stitch size, the thread tension will differ only slightly from thread feeding device to thread feeding device after the thread speeds have been synchronized. Changes to the machine are also at least partially compensated for by the master's regulation, which continues to work, and which adapts the thread speed to the specified thread tension.
  • This procedure elegantly takes advantage of the fact that it is not necessary to keep thread tension and thread speed constant for a high-quality, ring-free, smooth product, but only to ensure that a change in the thread speed is distributed over several rows of stitches does not occur from one stitch row to the other stitch row. This is ensured by the parallel connection of the thread speeds, with a change in the thread speed due to a control process on the "master" being allowed to take place over a larger number of stitches.
  • control signals for the device for specifying the thread speed of all remaining thread supply devices are generated from the movement of the device for specifying the thread speed of the selected thread supply device. In this way, the thread speed on the "master” thread delivery device is mapped directly to the "slave” thread delivery devices without the interposition of a control unit on the "master".
  • the organs for adjusting the stitch size can be actuated automatically, for example in the form of servo-controlled knitting locks
  • deviations in the thread tension on the thread delivery devices with respect to the thread tension on the selected thread delivery device can be compensated for by automatic readjustment of the organs to adjust the stitch size.
  • This measure can ensure that the same thread tension and the same thread speed always prevail on all thread delivery devices. Even with such a control, however, it is not a hindrance if the thread speed changes uniformly for all thread delivery devices by means of a control process on the "master" over a plurality of stitch rows.
  • Such a change in the thread speed is, as already described above, for example during manufacture of stockings even required to be able to hold the desired thread tension when carrying out the strength graduation.
  • the "master-slave" control can have a disadvantageous effect if a control requirement essentially only occurs on the master.
  • the thread speed is also measured. This is particularly advantageous if a device for the manufacture of the knitted or knitted fabric is preset before the actual manufacture of the knitted or knitted fabric. Because then the same thread tension can first be specified and deviations in the constantly measured thread speed can be compensated for by the fact that the organs for adjusting the stitch size are automatically readjusted in accordance with a predetermined thread speed value until this speed value is reached.
  • the thread speed is measured and then displayed, for example, on the thread delivery device.
  • This enables an operator to set the thread speed for all thread delivery devices equally for a given, identical thread tension by manually adjusting the organs to adjust the stitch size.
  • the invention furthermore proceeds from a device for producing a knitted or knitted fabric for a plurality of threads with organs for adjusting the stitch size and thread delivery devices for at least some of the threads, which comprise a sensor unit for measurement and an electronics unit for regulating the thread tension, with With the help of the respective electronic unit for regulating the thread tension, the thread speed of the threads can be adjusted by means of a device for specifying the thread speed.
  • the essential aspect for such a device is that the electronic unit of at least one selected thread delivery device is designed to control signals for the control of the devices for thread speed specification of all the remaining ones in accordance with the activation of the device for specifying the thread speed, which results from the thread tension measured on this thread supply device Pass on thread delivery devices.
  • the electronics unit preferably comprises a microprocessor.
  • the device for specifying the thread speed comprises a thread wheel, over which a thread is guided as slip-free as possible, the electronic unit of the selected thread delivery device generating control signals for controlling the thread wheel electric motors of the remaining thread delivery devices from the rotary movement of the thread wheel.
  • control signals for controlling the thread wheel electric motors of the remaining thread delivery devices from the rotary movement of the thread wheel.
  • position sensors are arranged on the thread wheels, by means of which it is possible to determine not only the relative but also the absolute position of a thread wheel.
  • the electronic unit of the "master" thread delivery device can transmit this position information in the form of control signals to the "slave" thread delivery devices, whereby their thread wheels are absolutely synchronized with the thread wheel of the "master".
  • a central control unit is provided with which, after the thread speeds have been synchronized, deviations in the thread tension on the thread delivery devices with respect to the thread tension on the selected thread delivery device by readjusting the Organs for adjusting the mesh size can be compensated.
  • a PC can be used as the central control unit, for example, which can communicate with the thread delivery devices and the organs for adjusting the stitch size.
  • the central control unit is designed to change the thread delivery device as a selected thread delivery device during operation of the device. In this way, as already explained above, the fact that the thread path after the selected "master" thread delivery device behaves atypically in comparison to other thread paths after the thread delivery devices can be taken into account.
  • the invention is also based on a thread delivery device for a knitting or knitting machine or a yarn production machine, which comprises a sensor unit for measurement and an electronics unit for regulating the thread tension, the speed of the thread being controlled via a device for regulating the thread tension with the aid of the electronics unit Thread speed specification, preferably an electric motor-operated thread wheel, over which a thread is guided as slip-free as possible, can be adjusted.
  • Thread speed specification preferably an electric motor-operated thread wheel, over which a thread is guided as slip-free as possible, can be adjusted.
  • the electronic unit is designed to receive control signals from the outside via an interface for controlling the device for specifying the thread speed. By doing this, e.g. B. the rotation of a Thread wheel can only be regulated by external signals.
  • the internal control of the thread wheel is preferably suppressed in favor of the external control signals on the basis of the thread tension measured on this thread delivery device.
  • Such a configuration of the thread delivery device can be used, for example, in yarn production in order to accelerate the device for specifying the thread speed for a loop formation in a targeted manner in the short term.
  • the electronic unit is designed to send control signals to the outside via an interface for controlling the device for specifying the thread speed of other thread supply devices.
  • the interface be bus-compatible.
  • a simple presetting of several thread delivery devices for. B. to make possible on a knitting machine
  • a sensor unit is provided for measuring the thread speed.
  • An indication of the thread speed is preferably present on the thread delivery device.
  • the interface on the thread delivery device is also designed to pass on the thread speed.
  • FIG. 1 An embodiment of the invention is shown in a drawing and explained in more detail with details and advantages.
  • the figure shows a knitting machine in a schematic block diagram with eight thread delivery devices 1 to 8 and eight associated knitting locks 9 to 16, which are connected to a central control unit 18 via a bus connection 17.
  • the bus can also be operated via an interface 19 and connecting lines 20 shown in broken lines.
  • the interface 19 has the task of preparing data from the control unit 18 for the data bus.
  • a conventional PC can be used as the control unit 18 and a correspondingly designed plug-in card for the PC can be used as the interface 19.
  • a separate input device 21 (also shown in dashed lines), which is integrated in the data bus, can also be advantageous for simplified input.
  • the thread delivery devices 1 to 8 preferably have a thread wheel, via which a thread to be transported z. B. is performed slip-free by double wrapping. Furthermore, the thread delivery devices comprise a sensor unit for measuring the thread tension and an electronics unit which, in accordance with a predetermined thread tension, the thread speed, i. H. the rotation of the thread wheel regulates. The thread wheel is moved, for example, by an electric motor, the electronic unit regulating the rotation of the electric motor.
  • a thread delivery device for. B. the thread delivery device for the knitting lock 1 can be defined as "master".
  • master all other thread delivery devices 2 to 8 receive from the "master" thread delivery device control signals for the thread wheel rotation which correspond to the rotation of the thread wheel of the "master”.
  • all thread delivery devices 1 to 8 are set to the same thread transport speed.
  • fluctuations in the thread guidance of the knitting machine can still be compensated for by the "master”, who then readjusts the thread speed for all thread delivery devices in order to maintain the specified thread tension.
  • changes in the thread speed are permitted in this way, these take place over a comparatively large knitting area, ie several rows of knitting, so that visible streaking on the knitted fabric can be avoided.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

Procédé de fabrication d'un article tricoté à partir de plusieurs fils sur une machine à tricoter dotée d'organes (9-16) permettant le réglage de la taille des mailles et d'appareils d'alimentation (1-8) pour au moins une partie des fils, qui sont conçus pour la mesure et la régulation de la tension des fils, la vitesse des fils étant adaptée à l'aide d'un dispositif indicateur de vitesse voulue de fil en vue de la régulation de la tension des fils. Selon la présente invention, la commande du dispositif indicateur de vitesse voulue de fil d'un appareil sélectionné d'alimentation en fil, résultant de la tension mesurée au niveau de cet appareil d'alimentation, sert de base à la commande des dispositifs indicateurs de vitesse voulue de fil de tous les appareils d'alimentation en fil restants. La présente invention concerne en outre un dispositif ainsi qu'un appareil d'alimentation en fil pour la mise en oeuvre spécifique dudit procédé.
PCT/DE2000/003639 1999-11-09 2000-10-17 Procede et dispositif de fabrication d'un article tricote, et appareil d'alimentation en fil pour une machine a tricoter ou pour une machine de production de fil WO2001034891A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19941/01A AU1994101A (en) 1999-11-09 2000-10-17 Method and device for producing a knitted item and a yarn feed device for a knitting machine or a yarn production machine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19953944.8 1999-11-09
DE19953944 1999-11-09
DE10005101A DE10005101A1 (de) 1999-11-09 2000-02-07 Verfahren und Vorrichtung zur Herstellung einer Strick- oder Wirkware sowie Fadenliefergerät für eine Strick- oder Wirkmaschine bzw. Garnproduktionsmaschine
DE10005101.4 2000-02-07

Publications (1)

Publication Number Publication Date
WO2001034891A1 true WO2001034891A1 (fr) 2001-05-17

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Application Number Title Priority Date Filing Date
PCT/DE2000/003639 WO2001034891A1 (fr) 1999-11-09 2000-10-17 Procede et dispositif de fabrication d'un article tricote, et appareil d'alimentation en fil pour une machine a tricoter ou pour une machine de production de fil

Country Status (2)

Country Link
AU (1) AU1994101A (fr)
WO (1) WO2001034891A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH653717A5 (en) * 1981-08-31 1986-01-15 Tecan Ag Method for the run-through measurement of textile threads in textile machines and apparatus for carrying it out
DE3827453C1 (fr) * 1988-08-12 1989-10-12 Hubert 5653 Leichlingen De Geueke
DE3832381C1 (en) * 1988-09-23 1989-12-28 Gustav 7290 Freudenstadt De Memminger Thread-delivery device
DE3901373C1 (en) * 1989-01-18 1990-03-22 Memminger-Iro Gmbh, 7290 Freudenstadt, De Apparatus for feeding tear-resistant filamentary material to the knitting stations of a multi-system circular knitting machine
EP0950742A2 (fr) * 1998-04-17 1999-10-20 B.T.S.R. International S.p.A. Dispositif de commande d'alimentation en fil d'une machine textile et procédé de commande de l'opération de la machine et de la production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH653717A5 (en) * 1981-08-31 1986-01-15 Tecan Ag Method for the run-through measurement of textile threads in textile machines and apparatus for carrying it out
DE3827453C1 (fr) * 1988-08-12 1989-10-12 Hubert 5653 Leichlingen De Geueke
DE3832381C1 (en) * 1988-09-23 1989-12-28 Gustav 7290 Freudenstadt De Memminger Thread-delivery device
DE3901373C1 (en) * 1989-01-18 1990-03-22 Memminger-Iro Gmbh, 7290 Freudenstadt, De Apparatus for feeding tear-resistant filamentary material to the knitting stations of a multi-system circular knitting machine
EP0950742A2 (fr) * 1998-04-17 1999-10-20 B.T.S.R. International S.p.A. Dispositif de commande d'alimentation en fil d'une machine textile et procédé de commande de l'opération de la machine et de la production

Also Published As

Publication number Publication date
AU1994101A (en) 2001-06-06

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