EP0617149A1 - Procédé pour égaliser de rubans de fibres textiles - Google Patents

Procédé pour égaliser de rubans de fibres textiles Download PDF

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Publication number
EP0617149A1
EP0617149A1 EP94101828A EP94101828A EP0617149A1 EP 0617149 A1 EP0617149 A1 EP 0617149A1 EP 94101828 A EP94101828 A EP 94101828A EP 94101828 A EP94101828 A EP 94101828A EP 0617149 A1 EP0617149 A1 EP 0617149A1
Authority
EP
European Patent Office
Prior art keywords
sliver
value
motor
speed
reaction point
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.)
Granted
Application number
EP94101828A
Other languages
German (de)
English (en)
Other versions
EP0617149B1 (fr
Inventor
Horst KÖPPLER
Ramona Dipl.-Ing. Bönisch
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.)
CSM Saechsische Spinnereimaschinen GmbH
Original Assignee
SPINNEREIMASCHINENBAU LEISNIG 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
Application filed by SPINNEREIMASCHINENBAU LEISNIG GmbH filed Critical SPINNEREIMASCHINENBAU LEISNIG GmbH
Publication of EP0617149A1 publication Critical patent/EP0617149A1/fr
Application granted granted Critical
Publication of EP0617149B1 publication Critical patent/EP0617149B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities

Definitions

  • the invention relates to a method for equalizing textile fiber tapes on textile machines in textile preparation.
  • the leveling of a textile sliver is achieved by measuring the sliver thickness and corresponding changes in the drive speeds in the main draft zone.
  • Various methods and devices are already known for this.
  • the method which has been known for the longest time is to detect the strip mass fed to a stretching field by scanning by means of pressing and to derive a change in the feed speed therefrom.
  • the fluctuation in thickness resulting from tape unevenness is passed on as a manipulated variable.
  • the distance between the measuring point and the effective point is bridged by means of a delay element.
  • the disadvantage of this method is that only the detection and influencing of thickness fluctuations is ensured compared to a predetermined initial position. A drift of the delivered tape mass is neither recorded nor can it be influenced. Since the method is linked to a mechanical device, the inertia of the individual elements acts. This is particularly troublesome at high belt speeds.
  • a method using an electronic control loop is known for fiber band equalization.
  • the incoming total tape mass is detected by a measuring element and immediately converted into an electronic signal.
  • the method is based on a drive division into a control motor and a main motor.
  • the main motor has the primary function of specifying the basic speed of the machine by means of a speed sensor.
  • a nominal value is applied to the motor on the input side, and a manipulated variable is determined in a computer as a function of time from a control measurement on the delivery side. This allows the correction of the delay to be calculated.
  • the disadvantage here is that a constant switchover of the entire control between setpoint specification and manipulated value change is brought about by a clock generator; the two signals are subordinated.
  • the manipulated variable can only be generated primarily and is not permanently available.
  • the switchovers are dependent on the delivery speed and thus have a negative impact on the influenceable correction length of the strip irregularities in the short-wave range.
  • All known methods and devices for uniformizing a sliver have the disadvantages of inertia and wear of mechanical transmission elements.
  • Electronic control loops have the decisive disadvantage that deviations measured after the stretching field are used as control signals for the fiber sliver being fed in, and thus a discrepancy arises between the measuring point and the effective point.
  • the object of the invention is to carry out the homogenization of textile fiber tapes in a drafting system in such a way that the measured tape unevenness is immediately and exactly compensated for, that no pieces of fiber tape pass the drafting system unbalanced and without having to check the result in a downstream measuring device.
  • the object is achieved in that the input tape mass is measured independently of the tape speed and the size of the measured value by means of absolute value transmitters in freely selectable steps, that each measured value is assigned its absolute position as a reaction point, that these two values are stored in a memory as a common pair of values be that the actual value of the input band mass is called up when the assigned reaction point is reached and is output to the motor as a speed setpoint via a frequency controller.
  • the absolute position of the strip unevenness is clearly defined by the same strip speed at the measuring location and in the stretching field.
  • the processor recognizes the actual value of the input belt mass from the value of its assigned absolute position and brings the setpoint for output to the motor and the terminal, this setpoint corresponding to the speed currently required and the change in distortion associated with the unevenness of the hand. It is optionally possible to form an average from a freely selectable number of measured values and to store this average value coupled with the value of an absolute position as a reaction point in the memory.
  • the motor speed of the tape feed drive changes, regardless of the absolute size of the measuring steps, whenever the measuring point or the beginning of the respective measuring section reaches the reaction point.
  • the position of the reaction point and thus the distance to be covered from the measuring point to the reaction point is automatically determined by the processor for different slivers according to the average fiber length entered at the terminal.
  • a length of freely selectable test sliver is run at the start of the processing of a new sliver type, from which the average sliver mass at the outlet is determined externally and entered into the processor via the terminal, and the processor automatically sets the basic delay in this regard corrected that the required storage tape mass is observed.
  • the measured actual value IW / EW is entered into the memory S and coupled with the value of the absolute position SW / R of the reaction point R, which results from the distance lR to be covered.
  • the actual value acquisition IW / EM can take place at any intervals x.
  • the processor P constantly checks the reaction points SW / R assigned to the actual values IW / EM by comparing them with the actual value IW / R to determine whether a pair of values IW / EM // SW / R has reached the reaction point R.
  • the desired value SW / D is output to the motor M 1 and the value SW / AT to the output terminal AT according to the measured deviation of the strip thickness from the average strip thickness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP94101828A 1993-02-25 1994-02-07 Procédé pour égaliser de rubans de fibres textiles Expired - Lifetime EP0617149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4306343A DE4306343C1 (de) 1993-02-25 1993-02-25 Verfahren zur Vergleichmäßigung von textilen Faserbändern
DE4306343 1993-02-25

Publications (2)

Publication Number Publication Date
EP0617149A1 true EP0617149A1 (fr) 1994-09-28
EP0617149B1 EP0617149B1 (fr) 1997-08-27

Family

ID=6481647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101828A Expired - Lifetime EP0617149B1 (fr) 1993-02-25 1994-02-07 Procédé pour égaliser de rubans de fibres textiles

Country Status (2)

Country Link
EP (1) EP0617149B1 (fr)
DE (2) DE4306343C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692560A1 (fr) * 1994-07-12 1996-01-17 Chemnitzer Spinnereimaschinenbau GmbH Procédé pour réguler un système d'étirage, en particulier sur une machine de cardage, et dispositif pour réguler
EP0803596A3 (fr) * 1996-04-22 1999-07-14 Rieter Ingolstadt Spinnereimaschinenbau AG Méthode de régulation déterminant une valeur minimale dans une machine d'étirage ou de cardage
US6286188B1 (en) 1997-09-01 2001-09-11 Maschinenfabrik Rieter Ag Regulated drawing frame
US6581248B1 (en) 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538496A1 (de) * 1995-08-08 1997-02-13 Rieter Ingolstadt Spinnerei Lineare Messung der Faserbanddicke oder -masse
DE19807496B9 (de) 1998-02-21 2008-05-21 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Vorrichtung zur Steuerung des Verzuges an einem Streckwerk für textiles Fasermaterial

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141505A1 (fr) * 1983-09-05 1985-05-15 Chubu Seiko Co. Ltd. Dispositif de contrôle automatique de l'étirage dans une machine de filature
EP0192835A1 (fr) * 1985-02-15 1986-09-03 Maschinenfabrik Rieter Ag Dispositif pour la détection continue de la masse d'une bande de fibres
DE3619248A1 (de) * 1986-06-07 1987-12-10 Zinser Textilmaschinen Gmbh Verfahren zur steuerung des verzugs eines faserbandes bei einer textilmaschine
EP0477589A1 (fr) * 1990-09-26 1992-04-01 Maschinenfabrik Rieter Ag Procédé pour la correction d'un signal de mesure déterminé pour la masse d'un ruban de carde d'un régulateur d'étirage pour des rubans de carde avec un organe de mesure de sortie

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1227771B (it) * 1986-07-04 1991-05-06 Zinser Textilmaschinen Gmbh Procedimento e dispositivo per regolare lo stiro di un nastro di fibre in una macchina tessile.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141505A1 (fr) * 1983-09-05 1985-05-15 Chubu Seiko Co. Ltd. Dispositif de contrôle automatique de l'étirage dans une machine de filature
EP0192835A1 (fr) * 1985-02-15 1986-09-03 Maschinenfabrik Rieter Ag Dispositif pour la détection continue de la masse d'une bande de fibres
DE3619248A1 (de) * 1986-06-07 1987-12-10 Zinser Textilmaschinen Gmbh Verfahren zur steuerung des verzugs eines faserbandes bei einer textilmaschine
EP0477589A1 (fr) * 1990-09-26 1992-04-01 Maschinenfabrik Rieter Ag Procédé pour la correction d'un signal de mesure déterminé pour la masse d'un ruban de carde d'un régulateur d'étirage pour des rubans de carde avec un organe de mesure de sortie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Vergleichmässigungsverfahren und -einrichtungen", SPINNER, WEBER UND TEXTILVEREDLUNG, no. 4, 1961, WURZBURG DE, pages 309 - 322 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692560A1 (fr) * 1994-07-12 1996-01-17 Chemnitzer Spinnereimaschinenbau GmbH Procédé pour réguler un système d'étirage, en particulier sur une machine de cardage, et dispositif pour réguler
WO1996001917A1 (fr) * 1994-07-12 1996-01-25 Csm Sächsische Spinnereimaschinen Gmbh Procede et dispositif de regulation de bancs d'etirage, notamment au niveau de machines a carder
US5815889A (en) * 1994-07-12 1998-10-06 Csm-Saechsische Spinnereimaschinen Gmbh Process and device for regulating drafting equipment, in particular in carding machines
EP0803596A3 (fr) * 1996-04-22 1999-07-14 Rieter Ingolstadt Spinnereimaschinenbau AG Méthode de régulation déterminant une valeur minimale dans une machine d'étirage ou de cardage
US6581248B1 (en) 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet
US6286188B1 (en) 1997-09-01 2001-09-11 Maschinenfabrik Rieter Ag Regulated drawing frame

Also Published As

Publication number Publication date
EP0617149B1 (fr) 1997-08-27
DE59403822D1 (de) 1997-10-02
DE4306343C1 (de) 1994-07-14

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