EP2565310B1 - Kettenwirkmaschine - Google Patents

Kettenwirkmaschine Download PDF

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Publication number
EP2565310B1
EP2565310B1 EP20110007029 EP11007029A EP2565310B1 EP 2565310 B1 EP2565310 B1 EP 2565310B1 EP 20110007029 EP20110007029 EP 20110007029 EP 11007029 A EP11007029 A EP 11007029A EP 2565310 B1 EP2565310 B1 EP 2565310B1
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EP
European Patent Office
Prior art keywords
knitting machine
warp knitting
machine according
springs
speed
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.)
Active
Application number
EP20110007029
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2565310A1 (de
Inventor
Klaus Benno Brandl
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.)
Karl Mayer Textilmaschinenfabrik GmbH
Original Assignee
Karl Mayer Textilmaschinenfabrik 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.)
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Publication date
Application filed by Karl Mayer Textilmaschinenfabrik GmbH filed Critical Karl Mayer Textilmaschinenfabrik GmbH
Priority to EP20110007029 priority Critical patent/EP2565310B1/de
Priority to CN201110411515.7A priority patent/CN102965835B/zh
Publication of EP2565310A1 publication Critical patent/EP2565310A1/de
Application granted granted Critical
Publication of EP2565310B1 publication Critical patent/EP2565310B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/14—Thread tensioning rod arrangements

Definitions

  • the invention relates to a warp knitting machine having a yarn delivery area, a knitting area and a thread tension compensation device between the yarn delivery area and the effective area, wherein the thread tension compensation device has an externally operable adjusting device with which a natural frequency of the thread tension compensation device is variable.
  • the warp threads are often at a constant speed from the yarn delivery area fed.
  • the yarn delivery area has, for example, a warp beam which is driven such that the speed of the yarns supplied is constant.
  • the yarn consumption is not constant, but varies by an average value corresponding to the constant speed.
  • a thread tension compensation device is arranged between the yarn delivery area and the effective area. With this yarn tension compensation device, the different yarn consumption during mesh formation is compensated. The thread tension compensation device also absorbs the negative thread consumption, ie the return of the stitch formation.
  • a relatively simple embodiment of a thread tension compensation device has a spring arrangement.
  • the springs of the spring assembly By a deformation of the springs of the spring assembly, the changing length of the threads between the yarn delivery area and the effective range is compensated, resulting in the stitch formation.
  • This spring arrangement is charged once each stitch formation and once relieved. Accordingly, an excitation acts on the spring assembly at a frequency that depends on the operating speed of the warp knitting machine. In this case, it can easily happen that the thread tension compensation device is vibrated in such a way that it can no longer fulfill its actual task of compensating for the changing thread consumption. This risk exists in principle even if instead of a spring arrangement other means can be used to accommodate the variations in yarn consumption.
  • DE 20 28 229 A shows a device for compensation and for the control of different yarn tensions in warp knitting machines.
  • This device has leaf springs which carry an elongated tendon having a rounded surface over which the threads are passed.
  • the leaf springs are attached to a base which pivots back and forth with each stitching operation.
  • DE 26 27 793 A1 describes a method and a device for the commissioning of warp knitting machines, in which a yarn rocker is tensioned before switching on the warp knitting machine. After switching on the warp knitting machine, the tension acting on the thread rocker is reduced to an operating level.
  • the invention has for its object to easily keep a decrease in quality of knitwear small.
  • the adjusting device has an actuator which is connected to a control device which controls the actuator.
  • the worker can thus operate when starting the warp knitting machine or at the beginning of the production of the knitted fabric, for example, the adjusting device and ensure that the yarn tension compensation device optimally compensates for the fluctuating yarn consumption, without even getting into vibration.
  • the actuator can be designed in different ways. It can be an electric motor. However, the actuator can also pneumatically, hydraulically, magnetically, with piezo technology or otherwise done. In many cases, a large actuation length is not required to change the natural frequency of the yarn tension compensation device so that it can optimally act on the supplied yarns.
  • the actuator is connected to a control device which controls the actuator. At least one can then partially automate the adjustment of the natural frequency.
  • the thread tension compensation device preferably has a spring arrangement.
  • a spring assembly is a relatively simple structure to compensate for variations in yarn consumption and associated thread tension variations.
  • the spring arrangement comprises a plurality of springs, which are distributed over the working width of the warp knitting machine, wherein the adjusting device acts on all springs at the same time.
  • the adjusting device can change the hardness of the springs or a point of application of the springs on the machine frame.
  • gas springs such as pneumatic springs
  • the pressure in the gas springs can be changed. It eliminates the time-consuming process of having to adjust all springs manually.
  • the springs are connected to a biasing device whose bias is variable by the adjusting device. This can change the force with which the springs ultimately act. This is a simple way to act on the natural frequency of the yarn tension compensation device.
  • the biasing means for each spring on at least one auxiliary spring with two sections, of which a first portion with the spring and a second portion is connected to an actuator.
  • the actuator can be actuated from the outside, for example from a front side of the warp knitting machine ago.
  • the actuator of the adjusting device is designed as a rotatably mounted shaft on which the auxiliary springs are fixed non-rotatably with its second portion. When the shaft is rotated, it changes the bias of the auxiliary springs.
  • the springs each have a helically guided portion which is guided around the shaft.
  • the springs are fixed relative to the auxiliary springs in a simple manner spatially.
  • a speed detecting means for the operating speed of the warp knitting machine is provided, which is connected to the control device, wherein the control device actuates the actuator in response to the output signal of the speed detecting device.
  • the frequency of the load applied to the thread tension compensator depends on the speed at which the warp knitting machine is operating. If you know this speed, then you know it also the "interference frequency" and can then adjust the natural frequency of the yarn tension compensation device accordingly.
  • the speed detection device does not have to measure the speed or speed directly. It is sufficient if it delivers a signal that has sufficient information about the working speed of the warp knitting machine.
  • the speed detection device comprises a current measuring device which detects the current of a main drive motor of the warp knitting machine.
  • the current of the main drive motor of the warp knitting machine depends on the speed of this motor. By measuring this current, it is therefore possible to obtain sufficiently accurate information about the rotational speed of the warp knitting machine and thus about the working speed, so that the natural frequency of the yarn tension compensating device can be set with sufficient accuracy.
  • the speed detection device has a speed sensor.
  • a speed sensor is present in many warp knitting machines anyway, because it is needed for certain control tasks.
  • a speed sensor provides a relatively accurate statement about the current speed of the warp knitting machine.
  • a vibration sensor may be provided which detects a vibration of the warp knitting machine and with the control device connected is.
  • a vibration sensor detects vibrations on the warp knitting machine, which also act on the yarn tension compensation device. Even with this information, the control device can control the actuator so that the natural frequency of the yarn tension compensation device does not match the vibration of the warp knitting machine.
  • the control device has a memory device in which an association between a speed profile and a profile of the natural frequency of the thread tension compensation device is stored.
  • the frequency of the thread tension compensation device can be changed as a function of the engine speed.
  • the speed of the warp knitting machine is increased until the desired working speed is reached.
  • the natural frequency of the thread tension compensation device can then be adapted to the current machine speed, so that an optimum stress distribution in the threads can be set.
  • the memory device is connected to an input device with which the assignment can be changed.
  • the natural frequency of the thread tension compensation device can also be adapted to different goods, alloys, machines, etc.
  • the input device may include, for example, a keyboard and a screen. It can also have a read station for a disk or an interface with a computer.
  • the "curves”, ie the associations between different velocities and the associated natural frequency curves, can be determined experimentally or by calculation. It is also possible to specify the curves by calculation and to allow a correction by the worker.
  • Fig. 1 shows a highly schematized warp knitting machine 1 with a yarn delivery area 2 and an effective range 3.
  • a warp beam 4 is arranged, which supplies a group of yarn.
  • the yarn sheet has a plurality of juxtaposed threads 5, one of which can be seen in the figure. The other threads are perpendicular to the drawing plane behind.
  • the warp beam 4 is driven by a drive 6 so that the threads 5 are discharged at a constant speed.
  • the active region 3 which is shown here greatly simplified, has a knitting needle bar 7, on which a plurality of knitting needles 8 are arranged.
  • the knitting needles 8 are arranged perpendicular to the plane one behind the other, so that only one knitting needle 8 is visible.
  • the active region 3 has a guide bar 9, on which a plurality of perforated needles 10 are arranged.
  • the other hole needles are perpendicular to the drawing plane behind.
  • Each thread 5 is guided by a perforated needle 10 (also referred to as a guide needle).
  • a yarn tension compensation device 11 is provided, which will be explained below.
  • the thread tension compensation device 11 has in the present case a tube 12, over which the threads 5 are slidably guided. Previously, the threads 5 have been passed through a Riet 13, which keeps the distribution of the threads 5 in the width direction of the warp knitting machine (perpendicular to the plane) evenly.
  • the tube 12 is attached via a plurality of springs 14 on a machine-fixed bracket 15.
  • Each spring 14 has a helically guided portion 16 which is guided around a shaft 17.
  • the shaft 17 is fixed spatially by the springs 14, but can rotate in the springs 14, without affecting their bias.
  • the not connected to the tube 12 end of the spring 14 is fixed with a clamping device 18 on the bracket 15.
  • Adjacent springs 14 have in the helically guided portion 16 opposite slopes and form a pair.
  • auxiliary springs 19 are arranged between each two such pairs of springs 14 .
  • the auxiliary springs 19 are connected to one end 20 by a clamping device 21 rotatably connected to the shaft 17. Instead of a clamping device 21, you can also screw the end 20 to the shaft 17.
  • the auxiliary spring 19 is thus rotatably connected to the shaft 17.
  • the other end of the auxiliary spring 19 is connected via a connecting device 22 with the end of the spring 14, which in turn is connected to the tube 12.
  • the shaft 17 can by an actuator 24 ( Fig. 1 ) to be turned around.
  • the actuator 24 may be formed, for example, as an electric stepper motor. In simply stored cases, the actuator 24 may also be formed by a manually operable transmission. Instead of an electric motor you can also use another motor, which is for example pneumatically or hydraulically operated or you can use a piezo drive.
  • the actuator 24 is driven in the present embodiment by a control device 25.
  • the control device 25 is connected to a main drive motor 26 of the warp knitting machine, which drives a main shaft 27.
  • the main shaft 27 actuates in known manner the knitting needle bar 7 (as schematically represented by a plunger 28) and also the guide bar 9.
  • the main motor 26 may have a speed sensor 29, which provides a speed information to the control device 25. But it is also possible that the control device 25 is connected to a current measuring device 30, which determines the current of the main drive motor 26.
  • the current consumed by the main drive motor 26 and the speed of the main drive motor 26 have a known relationship, which need not necessarily be linear. If the information about the power consumption is available, then there is also information about the speed and thus the rotational frequency of the warp knitting machine available.
  • vibration sensor 31 which determines vibrations of the warp knitting machine 1. These vibrations could also be transmitted to the thread tension compensation device 11.
  • the control device 25 is connected to a memory device 32. Specifications may be stored in the memory device 32 as to how the control device 25 must control the actuator 24 so that the thread tension compensation device 11 can operate optimally at any speed. For example, an association between a velocity profile and a natural frequency profile of the thread tension compensation device 11 can be stored here. This assignment can be stored in the form of curves. However, it is also possible to store this assignment in the form of tables.
  • the memory device 32 is connected to an input device 33. With the aid of the input device 33, it is possible to read different "curves" or “tables” into the memory device 32, so that the dependencies in different warp knitting machines or different knitted goods, for example in the Legung , can be stored in the processed material, differ in the thread tension or the like.
  • the natural frequency of the thread tension compensation device 11 is expediently set such that it has a certain distance from the working frequency of the warp knitting machine 1.
  • the natural frequency of the thread tension compensation device 11 is expediently set such that it has a certain distance from the working frequency of the warp knitting machine 1.
  • the warp knitting machine is braked, one must lower the natural frequency of the thread tension compensation device 11 accordingly.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP20110007029 2011-08-30 2011-08-30 Kettenwirkmaschine Active EP2565310B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20110007029 EP2565310B1 (de) 2011-08-30 2011-08-30 Kettenwirkmaschine
CN201110411515.7A CN102965835B (zh) 2011-08-30 2011-11-21 经编机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110007029 EP2565310B1 (de) 2011-08-30 2011-08-30 Kettenwirkmaschine

Publications (2)

Publication Number Publication Date
EP2565310A1 EP2565310A1 (de) 2013-03-06
EP2565310B1 true EP2565310B1 (de) 2014-03-26

Family

ID=44674072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110007029 Active EP2565310B1 (de) 2011-08-30 2011-08-30 Kettenwirkmaschine

Country Status (2)

Country Link
EP (1) EP2565310B1 (zh)
CN (1) CN102965835B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3159443A1 (de) 2015-10-23 2017-04-26 Karl Mayer Textilmaschinenfabrik GmbH Kettenwirkmaschine

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013216185B4 (de) * 2013-08-14 2019-08-14 Karl Mayer China Ltd. Vorrichtung zum Erzeugen eines Geleges
EP3133195B1 (de) * 2015-08-19 2018-12-26 Karl Mayer Textilmaschinenfabrik GmbH Fadenspanneinrichtung
CN107190412B (zh) * 2017-05-25 2019-01-29 江南大学 一种经编积极式张力补偿装置
EP3460112B1 (de) * 2017-09-20 2019-11-13 KARL MAYER Textilmaschinenfabrik GmbH Verfahren zum einarbeiten einer kettenwirkmaschine und kettenwirkmaschine
CN108193372B (zh) * 2018-01-05 2023-06-23 常州市赛嘉机械有限公司 一种宽隔距双针床经编机纱线的电子张力补偿方法
DE102019109426A1 (de) * 2019-02-15 2020-08-20 Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen Verfahren und Vorrichtung zum Ermitteln eines Betriebszustandes einer maschenbildenden Maschine
CN109914028B (zh) * 2019-04-18 2020-07-03 嘉兴市鑫诚经编有限公司 一种经编机压辊调节纱线张力装置
CN111519334B (zh) * 2020-04-27 2021-10-15 桐乡市纳兰经编纺织有限公司 一种高支短纤纱经编面料及其制备方法
CN111453542B (zh) * 2020-04-27 2022-02-22 桐乡市纳兰经编纺织有限公司 一种用于高支短纤纱经编织造的气囊张力系统
CN111663239B (zh) * 2020-06-28 2021-07-27 福州力天纺织有限公司 一种便于调整的经编机纱线张力装置
CN114753055A (zh) * 2022-05-24 2022-07-15 五洋纺机有限公司 一种新型调节纱线张力平衡的装置
CN115305634A (zh) * 2022-08-26 2022-11-08 浙江理工大学 一种纱线二级张力补偿装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811027A (en) * 1954-12-24 1957-10-29 Textile Machine Works Yarn tensioning means for knitting machines
US3412583A (en) * 1967-01-27 1968-11-26 Textile Machine Works Yarn tension means for warp knitting machines
US3597940A (en) * 1969-06-23 1971-08-10 Crompton & Knowles Corp Yarn tension control means for warp-knitting machine
US3631689A (en) * 1970-05-07 1972-01-04 Travis Mills Corp Yarn-tensioning means for warp-knitting machines
DD126355B1 (de) * 1975-07-24 1980-05-28 Schubert Frank Verfahren und vorrichtung zur inbetriebsetzung von kettenwirkmaschinen
DE4303967C2 (de) * 1993-02-10 1995-03-30 Liba Maschf Kettenwirkmaschine mit auf einer Legebarre angebrachten individuell bewegbaren Fadenführern
DE4439907C2 (de) * 1994-11-08 1997-04-10 Liba Maschf Kettenwirkmaschine mit einem Fadenspeicher in der Wirkfadenzuführung
CN201354402Y (zh) * 2009-01-20 2009-12-02 常州市润源经编机械有限公司 双针床经编机的送经装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3159443A1 (de) 2015-10-23 2017-04-26 Karl Mayer Textilmaschinenfabrik GmbH Kettenwirkmaschine

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Publication number Publication date
EP2565310A1 (de) 2013-03-06
CN102965835A (zh) 2013-03-13
CN102965835B (zh) 2014-10-15

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