EP0932711B1 - Procede et dispositif d'evaluation de la qualite d'un fil - Google Patents

Procede et dispositif d'evaluation de la qualite d'un fil Download PDF

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Publication number
EP0932711B1
EP0932711B1 EP97941781A EP97941781A EP0932711B1 EP 0932711 B1 EP0932711 B1 EP 0932711B1 EP 97941781 A EP97941781 A EP 97941781A EP 97941781 A EP97941781 A EP 97941781A EP 0932711 B1 EP0932711 B1 EP 0932711B1
Authority
EP
European Patent Office
Prior art keywords
measured values
yarn
yam
friction
measured
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
EP97941781A
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German (de)
English (en)
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EP0932711A1 (fr
Inventor
Peter Feller
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.)
Uster Technologies AG
Original Assignee
Zellweger Luwa AG
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Publication date
Application filed by Zellweger Luwa AG filed Critical Zellweger Luwa AG
Publication of EP0932711A1 publication Critical patent/EP0932711A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/26—Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting

Definitions

  • the invention relates to a method and a device for assessing a yarn in terms of its quality.
  • a first option is to fluctuate the mass of the yarn over its length seen to measure and count and deviate from an average rate.
  • the yarn can be applied through an electric field or through a light beam be scanned.
  • a second possibility is to increase the tensile strength of a yarn in a tensile test measure up.
  • the behavior of the yarn in this tensile test in turn provides information about the Quality of the yarn.
  • a third possibility is hairiness, i.e. the length, number or frequency of Measure the package of protruding fibers of the yarn.
  • the one property concerns, e.g. the mass fluctuation, the Appearance of the yarn or the textile fabric made with it.
  • Another Property e.g. the tensile strength is more concerned with physical properties or behavior in further processing
  • Another property e.g. the hairiness is more concerned with that Touching the textile fabric produced with it, the feeling that arises in humans, that comes from the yarn etc.
  • a disadvantage of the methods and devices known today for assessing the quality of a yarn is that the quality cannot be fully recorded with it.
  • There are still aspects of the quality of a yarn by the known methods and Devices are not recognized.
  • yarns that meet certain criteria and Properties have to be described as good because, for example, they are very even and are strong, yet problems with processing, e.g. when winding, weaving, etc. cause that limit the performance of the corresponding processing level.
  • DE 3732513 describes a method and a device for measuring and Testing of staple fiber threads is known, with the yarn thickness in a first measuring process is sensed over a piece length of a piece of yarn. Then the yarn piece freed from its yarn twists and then the yarn diameter over the Piece length recorded. Both measured values are compared with each other and from the result is concluded on the character of the yarn. But this can only be the rotation of one Checked yarns and any properties associated with them are examined.
  • DE 4411203 describes a device for measuring the torsional uniformity Twist, thread thickness, production speed and the length of threads known in which all these sizes in one pass of the thread through several sensors can be recorded. However, this only makes known aspects of the quality of one Yarns such as uniformity and twist in connection with influencing factors of the Performance determined.
  • the invention as characterized in the claims, now solves the problem To create methods and an apparatus with which further aspects of the quality of a Yarns can be taken into account and presented by measured values, so that the quality of a yarn as a whole can be grasped further.
  • the object is achieved in that for assessing a yarn with regard to its Quality, first measured values for at least one parameter of the yarn on one continuously moving yarn are detected, which previously exposed to friction is that second measurement of the at least one parameter of the yarn on that yarn are detected if the yarn is not previously subjected to friction and that the first and second measured values processed together to form a derived signal which is a measure of the quality of the yarn.
  • a device for performing The method accordingly has at least one measuring head for detecting the first and second measured values for a parameter of the yarn, a friction element and a unit for processing the measured values from the measuring head according to claim 6 connected to this.
  • Fig. 1 shows a device in the yarn 1 in the direction of the arrow in known and is therefore moved in a manner not shown here.
  • the following are arranged along the yarn 1: a first measuring head 2, a friction element 3, a second measuring head 4 and a speedometer 5.
  • a first measuring head 2 and 4 Via a line or a bus 6 and 7, the measuring heads 2 and 4 with one each Evaluation unit 8, 9 connected.
  • These are in turn via lines 10, 11 or a bus connected to a unit 12 for signal processing, which has an output 13.
  • the speedometer 5 is also connected to the unit 12 via a line 14. It is but it is quite possible to integrate the evaluation units 8 and 9 in the measuring heads 2 and 4. The same applies to the speedometer 5. In this somewhat more detailed Arrangement, however, the functions of the elements are easier to illustrate.
  • the measuring heads 2, 4 with the evaluation units 8, 9 are known elements that are commercially available Gamprüf mar are known ago. As an example of such a game tester, see below the name USTER TESTER known devices or yarn cleaners from the company Called Zellweger Uster.
  • the unit 12 for signal processing can, for example, as Be designed computer that a program for processing the measured values from the Lines 10 and 11 has.
  • the speedometer 5 is an element, as in Textile engineering is also known.
  • FIG. 2 shows another device with a measuring head 15 for a first yarn 16 and one second measuring head 17 for a second yarn 18.
  • a friction element 19 is only the measuring head 17 upstream.
  • Both measuring heads 15, 17 are in turn connected to evaluation units via lines 6, 7 8, 9 connected. Lines 10, 11 in turn connect them to a unit 12 Signal processing.
  • FIG 3 shows a further device with a measuring head 20 and a friction element 21, one Evaluation unit 22 and a unit 23 for processing measured values.
  • the friction element 21 is connected to the unit 23 via a line 24.
  • FIG. 4 shows schematically and in simplified form a friction element that acts as a fixed drum 25 is formed, which is looped by the yarn 26.
  • This preferably has a surface a non-textile material.
  • FIG. 5 shows a rotatable drum 27, which has a braking device 28 via an axis of rotation is mechanically connected.
  • Fig. 6 shows as a rubbing device a fixed bolt 29, of the yarn 30 only partially is entwined.
  • Fig. 7 shows as a friction element two rollers 31, 32 which pinch the yarn 33 and stand still or only partially, against resistance, with the yarn 33 running along.
  • Fig. 8 shows as a friction element two jaws 34, 35 which clamp the yarn 36.
  • One of the cheeks 35 is supported by a spring and exerts a compressive force on the yarn 36 and the jaw 34 out. The effects of the friction elements from FIGS. 7 and 8 can thus be adjusted or controlled educated.
  • the mode of action is as follows: While the yarn 1 (FIG. 1) is moved in its longitudinal direction, the measuring head 2 measures second measured values for a parameter of the yarn 1 that is not exposed to any particular friction. In the friction element 3, the yarn 1 is subjected to friction and the measuring head 4 measures first measured values for the parameter after the yarn 1 was exposed to friction. In the evaluation units 8, 9, the first and the second measured values are subjected to a first evaluation, which can mean, for example, that an average value of the parameter is calculated which is output together with the current measured value or that only a difference value to the average value is output. Such values are supplied via lines 10, 11 to unit 12, which generates a derived signal or third values from the supplied measured values from evaluation units 8 and 9. These are output via output 13.
  • the unit 12 can calculate the signals from one another from the fixed distance a and the current speed of the yarn 1 as it is transmitted via line 14 in such a way that the signals from lines 10 and 11 respectively can be assigned to a specific section of the game.
  • a yarn 16 can first reach the measuring head 15, then the measuring head 17, or yarn 16 can be a reference thread while yarn 18 is a yarn currently being measured.
  • the yarn can be switched on and off periodically Friction element 21 are measured.
  • the first measured values are switched on, the second Measured values measured with the friction element 21 switched off.
  • the unit receives via line 24 23 the information when the friction element is switched off and when it is switched on, or it can even are controlled by the unit 23.
  • the unit 23 then calculates the measured values consecutive yarn sections with each other to third values that the quality of the Specify yarn.
  • the friction generated on the friction elements has a greater or lesser degree Change in the yarn. This change manifests itself in third measured values, the are output by the unit 23.
  • the friction can also be more or less regardless of the current speed of the yarn, what with a 5 or 7 can succeed particularly when the drums 27th or rollers 31, 32 controllable, depending on the yarn speed can. 1, the friction element 3 can also be connected to the speedometer via a line 37 5 be connected.
  • Certain yarns have an unstable surface structure. They are hairy and the hair are not firmly anchored in the surface. In the event of friction or deflection, the hair will come on postponed the friction point and lead to local thickening, which the character of Have nits and are counted as such by game testers like USTER TESTER become. To measure real nits, therefore, the friction and the number of deflections be kept to a minimum. However, sensitive yarns are judged too positively because the next processing step creates further nits.
  • the number is preferably suitable as parameters that can be measured on the yarn Nits per yarn length or the number of diameter deviations that a set size exceed. Therefore, the speedometer 5 is preferably designed so that it can also output a signal to the unit 12 which indicates the detected thread length.
  • the 3rd values show that by subtracting the 2nd Measured values from the 1st measured values arose that there were deviations between the 2nd Measured values, i.e. values that are measured on yarn without friction and 1.
  • Measured values values that are measured on yarn with the influence of friction exist and one Provide information about the quality of the yarn. You can get similar results if you do Carries out measurements with other parameters not listed here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Claims (10)

  1. Procédé d'évaluation d'un fil quant à sa qualité, où des premières et secondes valeurs de mesure pour au moins un paramètre du fil sont détectées, et les premières et secondes valeurs de mesure sont traitées ensemble en un signal dérivé qui constitue une mesure d'une qualité du fil, caractérisé en ce que les premières et secondes valeurs de mesure sont détectées à un fil déplacé continuellement (1) et en ce que le fil, lors de la détection des premières valeurs de mesure, est exposé préalablement à un frottement et, lors de la détection des secondes valeurs de mesure, n'est pas exposé à un frottement.
  2. Procédé selon la revendication 1, caractérisé en ce que des premières et secondes valeurs de mesure sont détectées en série sur le même tronçon de fil.
  3. Procédé selon la revendication 1, caractérisé en ce que des premières et secondes valeurs de mesure sont détectées parallèlement au fil (16, 18).
  4. Procédé selon la revendication 1, caractérisé en ce que sont mesurées comme valeurs de mesure le nombre d'écarts de masse d'ondes courtes.
  5. Procédé selon la revendication 1, caractérisé en ce que le frottement est produit par le frottement du fil à un élément de frottement (25) en un matériau non textile.
  6. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, avec au moins une tête de mesure (2, 4, 15, 17, 20) pour détecter des premières et/ou secondes valeurs de mesure pour un paramètre du fil, caractérisé par un élément de frottement (3, 18, 21) qui expose le fil entre la détection de la première valeur de mesure à un frottement, et par une tête de mesure (4, 17, 20) pour la détection de secondes valeurs de mesure, lorsque le fil n'est pas exposé à un frottement et par une unité (12, 22, 23) qui est connectée pour le traitement des valeurs de mesure à partir d'au moins une tête de mesure en un signal dérivé des premières et secondes valeurs de mesure à celle-ci.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'unité (23) pour le traitement des valeurs de mesure, en vue de leur commande, est reliée à l'élément de frottement (21).
  8. Dispositif selon la revendication 6, caractérisé par deux têtes de mesure (2, 4) qui sont reliées toutes les deux à l'unité (12) pour le traitement de valeurs de mesure.
  9. Dispositif selon la revendication 6, caractérisé en ce que l'élément de frottement est entouré au moins partiellement par le fil.
  10. Dispositif selon la revendication 6, caractérisé en ce que l'élément de frottement (27, 35) est réalisé d'une manière réglable quant à son effet.
EP97941781A 1996-10-15 1997-10-08 Procede et dispositif d'evaluation de la qualite d'un fil Expired - Lifetime EP0932711B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH251496 1996-10-15
CH251496 1996-10-15
PCT/CH1997/000381 WO1998016673A1 (fr) 1996-10-15 1997-10-08 Procede et dispositif d'evaluation de la qualite d'un fil

Publications (2)

Publication Number Publication Date
EP0932711A1 EP0932711A1 (fr) 1999-08-04
EP0932711B1 true EP0932711B1 (fr) 2003-04-09

Family

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EP97941781A Expired - Lifetime EP0932711B1 (fr) 1996-10-15 1997-10-08 Procede et dispositif d'evaluation de la qualite d'un fil

Country Status (6)

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US (1) US6430995B1 (fr)
EP (1) EP0932711B1 (fr)
JP (1) JP3890609B2 (fr)
CN (1) CN1082576C (fr)
DE (1) DE59709801D1 (fr)
WO (1) WO1998016673A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7175136B2 (en) 2003-04-16 2007-02-13 The Boeing Company Method and apparatus for detecting conditions conducive to ice formation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1404761A (en) 1970-05-26 1975-09-03 Toyoda Automatic Loom Works Method of controllig a spinning operation
US4758968A (en) * 1985-05-16 1988-07-19 North Carolina State University Method and apparatus for continuously measuring the variability of textile strands
IT1198230B (it) * 1986-12-23 1988-12-21 Savio Spa Procedimento per individuare la velocita' e i paramenti operativi ottimali di roccatura per ogni tipo di filato
CH671973A5 (fr) * 1987-03-19 1989-10-13 Zellweger Uster Ag
US4766647A (en) * 1987-04-10 1988-08-30 Spinlab Partners, Ltd. Apparatus and method for measuring a property of a continuous strand of fibrous materials
DE3732513C2 (de) 1987-09-26 1996-07-18 Schlafhorst & Co W Verfahren und Vorrichtung zum Messen und Prüfen von Stapelfasergarn
DE4124626C2 (de) 1991-07-25 1994-06-30 Kugelfischer G Schaefer & Co Vorrichtung zur Messung der Windungszahl und/oder der Knoten bzw. Fadendicken von textilen Fäden
DE4411203A1 (de) * 1994-03-31 1995-10-05 Temco Textilmaschkomponent Vorrichtung zur Messung des Verwindungsgleichmaßes, der Drehungen/m, Fadendicken, der Produktionsgeschwindigkeit sowie der Lauflängen von Fäden

Also Published As

Publication number Publication date
US6430995B1 (en) 2002-08-13
CN1231707A (zh) 1999-10-13
EP0932711A1 (fr) 1999-08-04
JP2001502018A (ja) 2001-02-13
WO1998016673A1 (fr) 1998-04-23
CN1082576C (zh) 2002-04-10
DE59709801D1 (de) 2003-05-15
JP3890609B2 (ja) 2007-03-07

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