WO2012107869A1 - Appareil et procédé perfectionnés de commande de système d'entraînement d'un métier à filer continu à anneaux - Google Patents

Appareil et procédé perfectionnés de commande de système d'entraînement d'un métier à filer continu à anneaux Download PDF

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Publication number
WO2012107869A1
WO2012107869A1 PCT/IB2012/050529 IB2012050529W WO2012107869A1 WO 2012107869 A1 WO2012107869 A1 WO 2012107869A1 IB 2012050529 W IB2012050529 W IB 2012050529W WO 2012107869 A1 WO2012107869 A1 WO 2012107869A1
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WO
WIPO (PCT)
Prior art keywords
speed
spinning machine
controlling
ring spinning
driving system
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.)
Ceased
Application number
PCT/IB2012/050529
Other languages
English (en)
Inventor
Rajasekaran SRINIVASAN
Suresh PURUSOTHAMAN
Dharanipathi JAYAGOPAL
Badhrinath CHENNAIYAN
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.)
Lakshmi Machine Works Ltd
Original Assignee
Lakshmi Machine Works Ltd
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 Lakshmi Machine Works Ltd filed Critical Lakshmi Machine Works Ltd
Publication of WO2012107869A1 publication Critical patent/WO2012107869A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/32—Driving or stopping arrangements for complete machines

Definitions

  • the present invention relates to an improved apparatus and method of controlling ring spinning machine especially the driving system of the ring spinning machine which controls the plurality of components such as spindles, drafting systems, ring rail, auto doffing systems, etc.,
  • this invention concerns to control the twists imparted in the yarn according to the requirement , by means of controlling the rotational speed of spindles and drafting rollers.
  • the driving system of a ring spinning system comprises a common or individual motor which drives the plurality of machine components such as spindles, drafting systems, ring rail, auto doffing systems, etc.,
  • the spindles are driven by a motor connected with a common drive shaft extends along the entire length of the machine. Over the common driveshaft, plurality of pulleys are fixed, each has a driving flat belt engaging in the wharves on the spindles.
  • the drafting device used in a spinning machine such as a ring spinning machine or a roving machine is provided with 3 or 4 nos of drafting rollers which comprises of front bottom, middle bottom and back bottom rollers.
  • These bottom rollers of the drafting units are interconnected at one end by a gear train, which is driven by lay gear of the common spindle driving shaft or an individual motor.
  • These rollers extend continuously along the machine from one end to the other end wherein each of the drafting units are supported in bearings at spaced intervals. The speed ratio between these drafting rollers is maintained in such way to obtain the desired yarn fineness/count.
  • the count is the relationship between length and weight.
  • the twist (whether S or Z twist) is the relationship between length and number of turns per unit length (Twist) of yarn. These values of count and twist do not have straight relationship with each other, however any degree of variation in one, calls for a different degree of variation in the other.
  • the above said formula is normally used to calculate the twist value, and the result value is set as input to the machine.
  • Presently ring spinning machines are provided with individual driving motors for each drafting rollers or a driving motor for common drafting assembly/arrangement in respect of all rollers and spindles.
  • Said drafting rollers and spindles are controlled by means of a controller featured with a suitable PLC (Programmable logic controller) or microprocessor.
  • PLC Programmable logic controller
  • This PLC enables the drafting rollers and spindles to synchronize with each other to achieve the desired twist and count consistently throughout the spinning process. Having selected the process parameters of required count and required twist, the same is fed into the controller. The user enters the desired twist and count and its limiting range in the controller through the man-machine interface.
  • both count and twist are varied automatically by adjusting at least two of the following: the speed of the spindles, the speed of the front drafting rollers and the speed of the rear drafting rollers.
  • this twist variation may be due to various reasons like yarn tension, traveller tilting, traveller drag / lag, friction value between ring and traveller, contact region of traveller over ring, etc., It is known that the position of traveller over the ring flange during high speed and slow speed varies and influences for these reasons which directly leads to variation in twist.
  • This twist variation encounters during every acceleration and deceleration of machine. Usually the ring spinning machine is allowed to run at more time at the maximum speed to have higher operating speed. Even though the spindle speed and delivery of the drafting rollers are working as per the calculated set values, the variation of twist is severe in particularly slow speed of the machine due to the above reasons. However it is unavoidable to run the machine at slow speed during starting of cop build, during power failure, during manual stoppages, etc., These results were further confirmed with machines having the drafting system driven by the main drive shaft through gearing.
  • TPI tilt per inch
  • Another object of the invention is to provide a PLC which suits to the various process variables of raw materials.
  • the user defines the required data of count, twist, TPI compensating value and each of its limiting ranges, the operating time, length, etc., through the man-machine interface or display.
  • the ring spinning machine is provided with a controller provided with PLC where TPI compensating value is entered which manipulates the drive relationship between spindles and drafting rollers particularly during the slow speed of the machine or as specified by the user.
  • the drafting rollers and spindles are provided with individual drive motors that are being controlled as per the PLC to match with the required twist / count level, particularly in slow speed of the machine.
  • the PLC will act based on the input values set by the user at the slow speeds such as during the bobbin/cop build up from starting to 1 /4th position, machine stoppages by manually or power failures, etc.,
  • An apparatus for controlling a driving system of a ring spinning machine comprises:
  • a motor operatively connected to drive spindles and adapted to be connected to a source of power
  • a display and input device in communication with said PLC provided with means for inputting the count, twist, and each of its limiting range, operating time and length
  • Fig.1 schematically illustrates the drive arrangement of a ring spinning machine according to the invention.
  • Fig.2 schematically illustrates the block diagram of control arrangement /circuit for an arrangement shown in figure 1 .
  • the ring-spinning machine consists of a creel arrangement provided with suspended bobbin holders to support the roving bobbins, which is enable to feed the roving to drafting arrangement, which is provided at the downstream position of creel arrangement as known in the art.
  • the ring spinning machine is having a drafting arrangement (1 ) downstream of the creel arrangement.
  • a drafting arrangement (1 ) there may be of 3 or 4 bottom & top drafting roller pairs which comprise front, middle and back pairs respectively which are not shown in details.
  • Said bottom rollers of the drafting units are interconnected at one end by a gears train, which is driven by lay gears as known in the art. .
  • All drafting rollers are hereafter referred as drafting arrangement (1 ), which is driven by any one of the following means:
  • Said drafting arrangement (1 ) is being extended along entire length of the machine from one end to the other.
  • the drafting rollers of the drafting arrangement (1 ) are intermittently being supported in bearings at spaced intervals as required.
  • the speed ratio between said drafting rollers are maintained in such way to obtain the desired yarn fineness/count.
  • spindles (3) are positioned vertically as per spindle gauge on the spindle beam, which extend in the longitudinal direction of the machine.
  • the spindles (3) are driven by a main motor (4) connected with a common drive shaft (5) extends along the machine from motor end to the other end so as to drive each of all spindles.
  • a common drive shaft (5) extends along the machine from motor end to the other end so as to drive each of all spindles.
  • plurality of pulleys (6) are fixed, each has a driving flat belt (7) engaging in the wharves (9) on the spindles (3).
  • the ring spinning machines having independently working motors (2, 4) for the rollers of drafting arrangement (1 ) and spindles (3) respectively.
  • the speeds of motors (2, 4) are being controlled by means of a controller (10) provided with PLC.
  • the controller (10) continuously monitors the speeds of drafting rollers (1 ) and spindles (3) through sensors (1 1 , 12) , so that the speed relationship between the drafting rollers and spindles can be maintained.
  • the controller (10) comprises an in-built PLC which is linked to the man-machine interface.
  • Man-machine interface is an electronic device used to receive / show a data from / to the user, hereafter to be referred as display (13).
  • the twist per inch is measured in testing equipments by taking a sample yarn from the fully wound bobbins. It is observed that the higher twist variations occurs during built-up portion of first & final layers., For the purpose of testing, the first, middle and final yarn layers of full bobbin is being taken for measurement of twist variation.
  • the TPI variation values of all possible yarn counts are noted down and is used for arriving TPI compensation value .
  • the twist , twist variation, variation allowances the TPI compensating value arrived by the user is entered into the above system through the display (13).
  • the controller (10) precisely maintains the speed relationships between spindles (3) and drafting rollers (1 ) with respect to the input data such as count, twist(TPI), twist variation, variation allowances, TPI compensating values and its operating time and/or length.
  • the controller (10) continuously evaluates the signals received from the sensors (1 1 , 12) and initiates the necessary steps by based on the input data, to maintain the speed relationships between drafting rollers (1 ) and spindles (3). Based on the TPI compensating value the drafting roller speed profile will be modified in software for slow speeds ie the drafting roller speed will be increased in slow speeds to have normal TPI levels.
  • the apparatus provided with simple PLC helps to precisely control the count and twists in the yarn and so that the yarn is of substantially uniform structure throughout its length. Since the present invention precisely controls the speed relationship between the spindles and drafting rollers (particularly during the slow speed) of the machine with respect to real measured value, it is possible to achieve the accurate TPI in the resultant yarn. Because of the user defined input data instead of calculation derived data, the TPI variation is controlled effectively throughout the yarn spinning process. Uniform TPI throughout cop results in good appearance of fabric / yarn after dyeing. Hence this invention would be more useful and overcome the prior art problems and assures the efficient operation and productivity of the machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention porte sur un appareil de commande d'un système d'entraînement d'un métier à filer continu à anneaux, lequel appareil comprend deux moteurs pour entraîner respectivement un mandrin et un rouleau d'étirage, et un automate programmable (PLC) comportant une mémoire ayant une relation entre la vitesse du mandrin et la vitesse du rouleau d'étirage. Ledit appareil comporte un dispositif d'affichage et d'entrée en communication avec ledit PLC pour entrer les données requises en ce qui concerne un titrage, une torsion, etc., et une valeur de compensation est également entrée pour manipuler la relation de la vitesse du mandrin et du rouleau d'étirage.
PCT/IB2012/050529 2011-02-09 2012-02-06 Appareil et procédé perfectionnés de commande de système d'entraînement d'un métier à filer continu à anneaux Ceased WO2012107869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN365CH2011 2011-02-09
IN365/CHE/2011 2011-02-09

Publications (1)

Publication Number Publication Date
WO2012107869A1 true WO2012107869A1 (fr) 2012-08-16

Family

ID=46638182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/050529 Ceased WO2012107869A1 (fr) 2011-02-09 2012-02-06 Appareil et procédé perfectionnés de commande de système d'entraînement d'un métier à filer continu à anneaux

Country Status (1)

Country Link
WO (1) WO2012107869A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108388174A (zh) * 2018-02-12 2018-08-10 广东新会美达锦纶股份有限公司 一种纺丝用的牵伸辊控制装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0756089B2 (ja) * 1989-10-10 1995-06-14 エスカーエフ テクスティルマシネン‐コンポネンテン ゲーエムベーハー リング精紡機における糸の番手の均一化方法
CN1370867A (zh) * 2001-01-19 2002-09-25 里特机械公司 纺纱机的驱动控制系统
CN101634059A (zh) * 2008-07-24 2010-01-27 里特机械公司 具有单独锭子驱动器的环锭纺纱机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0756089B2 (ja) * 1989-10-10 1995-06-14 エスカーエフ テクスティルマシネン‐コンポネンテン ゲーエムベーハー リング精紡機における糸の番手の均一化方法
CN1370867A (zh) * 2001-01-19 2002-09-25 里特机械公司 纺纱机的驱动控制系统
CN101634059A (zh) * 2008-07-24 2010-01-27 里特机械公司 具有单独锭子驱动器的环锭纺纱机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108388174A (zh) * 2018-02-12 2018-08-10 广东新会美达锦纶股份有限公司 一种纺丝用的牵伸辊控制装置

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