EP0750060B1 - Appareil de détection des irregularités de la masse d'un ruban de fibres - Google Patents

Appareil de détection des irregularités de la masse d'un ruban de fibres Download PDF

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Publication number
EP0750060B1
EP0750060B1 EP96109122A EP96109122A EP0750060B1 EP 0750060 B1 EP0750060 B1 EP 0750060B1 EP 96109122 A EP96109122 A EP 96109122A EP 96109122 A EP96109122 A EP 96109122A EP 0750060 B1 EP0750060 B1 EP 0750060B1
Authority
EP
European Patent Office
Prior art keywords
measuring chamber
sliver
prechamber
pressure
nozzle
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
EP96109122A
Other languages
German (de)
English (en)
Other versions
EP0750060A1 (fr
Inventor
François BAECHLER
Jürg Zehr
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.)
Zellweger Luwa AG
Original Assignee
Zellweger Luwa AG
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 Zellweger Luwa AG filed Critical Zellweger Luwa AG
Publication of EP0750060A1 publication Critical patent/EP0750060A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
    • 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 device for determining irregularities the mass of a sliver, with a measuring chamber, with an input and an output for the sliver, in a gas stream is introduced through an opening or nozzle, where a relationship between the pressure in the gas stream and the irregularities in the sliver.
  • Such a device is known from DE-A-3036697, at which is a gas stream radial through a nozzle into a cylindrical one Measuring chamber is injected so that the gas flow into the sliver penetrates and spreads out there.
  • the measuring chamber is the pressure in the line with which the gas is fed, recorded and the measured pressure fluctuations are used to indicate fluctuations in the diameter of the sliver understood.
  • the line is also connected to a pressure transducer connected so that for the fluctuations in diameter an electrical signal is available.
  • pressure fluctuations caused by Fluctuations in diameter of the sliver are independent immediately passed on to the measuring system.
  • Such pressure fluctuations can for example, only from temporary flow conditions originate in the feed lines, but will but attributed to the fluctuations in diameter. Or, one in the area The sliver compressed in the nozzle can temporarily affect the gas flow oppose a higher resistance so that this too Circumstance is understood as a fluctuation in diameter.
  • the invention as characterized in the claims is therefore the task of creating a device that the diameter fluctuations of the sliver more precisely, faster and, in particular, indicates as far as possible adjusted for interferences.
  • the measuring chamber one assigned or connected upstream small chamber into which the Gas enters the measuring chamber before entering.
  • the antechamber is against the measuring chamber and against the pressure or gas source delimited by a nozzle or a throttle. So that will as an indication of the mass of the sliver the pressure of the gas in the antechamber, i.e. before entering the sliver with a Pressure sensor measured. This creates the opportunity the gas from the antechamber also through several openings in the Introduce measuring chamber and at a single point, i.e. to measure an average pressure in the antechamber.
  • the device according to the invention has various others Advantages on. For example, it also allows thicker sliver measure by this method because the arrangement of several Nozzles allow the gas flow to penetrate into the Dispense with the middle of the sliver. Furthermore, through this Solution of the pressure sensor very close to the prechamber or to the sliver to be ordered. With this solution it is also possible make the measuring chamber interchangeable, so that this can be optimally matched to the sliver to be measured.
  • Figure 1 shows a measuring chamber 4 in its environment, i.e. at the end an inlet funnel 3, which is on a measuring funnel plate 2 is attached.
  • the measuring chamber 4 is in the vicinity of take-off rollers 1 arranged, the sliver, not shown here by the Pull measuring chamber 4.
  • FIG. 2 shows again the inlet funnel 3 with the measuring chamber 4 and a sliver 5.
  • a measuring unit here 6 an electrical connection 7 and a gas or air duct 8 recognizable, which is connected to a source 9 for the air or gas flow is.
  • FIG. 3 allows the structure of the device according to the invention more precisely recognize, elements already known from FIG. 2 have the same reference numerals.
  • the Measuring unit 6 for example as an integrated pressure sensor or pressure transducer is formed in a manner known per se a pneumatic pressure into a corresponding electrical Converts signal.
  • the measuring unit 6 borders on an antechamber 10, which via an opening or nozzle 12 with the interior 14 of the Measuring chamber 4 is connected.
  • the measuring chamber 4 forms a cylindrical one Housing with an input and an output for that
  • the sliver and the prechamber 10 lie with the measuring unit 6 in a cylindrical housing 15 that is perpendicular to the measuring chamber 4 is pending at this.
  • the measuring chamber 4 has a recess 16 on.
  • a sealing ring 13 seals the two cylindrical Housing in the recess 16 from each other.
  • the antechamber 10 is via one or more bores 11, 17 with an annular channel 18 connected, which is connected to the air duct 8, which here as Air hose is formed.
  • the bore 11, 17 forms a throttle or pre-nozzle, the pressure in the prechamber 10 delimited from a source of pressure or gas and thus causes a predetermined pressure drop.
  • At 19 there is one Denoted axis, along which the nozzle 12, the pre-chamber 10 and the measuring unit 6 are lined up. In this version, the Nozzle 12 incorporated into the wall of the measuring chamber 4.
  • Figure 4 shows an embodiment with an annular prechamber 20, which encloses a measuring chamber 21 and one on one side Air duct 22 and on the other side an electrical connection 23 and a measuring unit 24. At least two Nozzles 25 and 26 open here from the pre-chamber 20 into the measuring chamber 21. There is a pre-nozzle or throttle against the pressure source here designated 47.
  • FIG. 5 shows a further embodiment with an axis 27 arranged nozzle 28, prechamber 29 and measuring unit 30, one electrical connection 31 and a pneumatic connection 32 are arranged coaxially.
  • the prechamber 29 is connected to a Ring channel 33 supplied with compressed air.
  • the ring channel 33 acts here as a throttle or pre-nozzle to the pre-chamber 29.
  • This ring channel 33 can thus have a cylindrical shape. Is fed this ring channel 33 through two or more bores 33a, 33b, so that one can assume that the throttle in the ring channel 33 or pre-nozzle made of several bores 33a, 33b or constrictions can exist.
  • Figure 6 shows an embodiment with parallel to a measuring chamber axis 34 arranged prechamber 35 and with an air supply 36 and a pneumatic connection 37 to the prechamber 35 for a corresponding pneumatic measuring unit. Also recognizable are a pre-nozzle 49 and a nozzle 39, which in the measuring chamber 40th flows.
  • the device detects via the measuring unit, which is designed as a pressure sensor, the pressure fluctuations in the antechamber.
  • the pressure in front of the pre-chamber is stabilized because it is shielded from interfering influences by the throttle or pre-nozzle that could come from the air supply.
  • the prechamber also stores a certain volume of air can be the function of a filter for small pressure fluctuations that are independent of the sliver or for noise caused by the sliver become. So the pressure sensor only measures those pressure fluctuations, which are generated by the sliver and which are essential be considered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (9)

  1. Dispositif pour la détermination d'irrégularités de la masse d'un ruban de fibres (5), avec une chambre de mesure (4, 21, 40, 41, 42) avec une entrée et une sortie pour le ruban de fibres, dans laquelle, par une ouverture ou buse (12, 25, 26, 28, 39, 45, 46) un flux de gaz provenant d'une source (9) est introduit, où il existe un rapport entre la pression dans le flux de gaz et les irrégularités dans le ruban de fibres, caractérisé en ce qu'il est prévu une préchambre (10, 20, 29, 35) qui est raccordée, d'une part, par un étranglement (11, 17 - Figure 3; 33 - Figure 5; 47 - Figure 4; 49 - Figure 6) à la source (9) avec une pression stable et, d'autre part, par l'ouverture ou buse (12, 25, 26, 28, 39, 45, 46) aux chambres de mesure (4, 21, 40, 41, 42) , et en ce qu'une unité de mesure (6, 24) est raccordée à cette préchambre.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'on obtient une courte durée de réaction du dispositif par un petit volume de gaz dans la préchambre (10).
  3. Dispositif selon la revendication 1, caractérisé en ce que la chambre de mesure (41, 42) est réalisée et disposée d'une manière échangeable.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'une adaptation du dispositif a une épaisseur prédéfinie du ruban de fibres a lieu sélectivement par un réglage de la pression dans la source (9) et par un échange de la chambre de mesure (41, 42) avec la buse (45, 46).
  5. Dispositif selon la revendication 1, caractérisé en ce que la préchambre présente plusieurs buses (25, 26) vers la chambre de mesure.
  6. Dispositif selon la revendication 1, caractérisé en ce que la source (9) pour l'émission d'un flux de gaz est réalisée avec une pression réglable et stabilisée.
  7. Dispositif selon la revendication 1, caractérisé en ce que la préchambre (20, 35) est réalisée pour s'étendre parallèlement à l'axe (34) de la chambre de mesure (21, 40).
  8. Dispositif selon la revendication 1, caractérisé en ce que la préchambre (20) est réalisée de manière à entourer annulairement la chambre de mesure (21).
  9. Dispositif selon la revendication 1, caractérisé en ce que la préchambre (20, 35) est délimitée par le pourtour extérieur de la chambre de mesure (21, 40).
EP96109122A 1995-06-22 1996-06-07 Appareil de détection des irregularités de la masse d'un ruban de fibres Expired - Lifetime EP0750060B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH182895 1995-06-22
CH1828/95 1995-06-22
CH01828/95A CH690131A5 (de) 1995-06-22 1995-06-22 Vorrichtung zur Bestimmung von Unregelmässigkeiten der Masse eines Faserbandes.

Publications (2)

Publication Number Publication Date
EP0750060A1 EP0750060A1 (fr) 1996-12-27
EP0750060B1 true EP0750060B1 (fr) 1999-12-08

Family

ID=4219554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109122A Expired - Lifetime EP0750060B1 (fr) 1995-06-22 1996-06-07 Appareil de détection des irregularités de la masse d'un ruban de fibres

Country Status (7)

Country Link
US (1) US5709011A (fr)
EP (1) EP0750060B1 (fr)
JP (1) JPH0913236A (fr)
CN (1) CN1071810C (fr)
AT (1) ATE187507T1 (fr)
CH (1) CH690131A5 (fr)
DE (1) DE59603835D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739186A1 (de) * 1997-09-08 1999-03-11 Truetzschler Gmbh & Co Kg Vorrichtung zum Verbinden und Zuführen von Faserbändern, insbesondere Karden- oder Streckenbändern
JPH11222735A (ja) * 1997-10-30 1999-08-17 Zellweger Luwa Ag 長く延びた繊維中間製品を引込む装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH436779A (de) * 1966-05-06 1967-05-31 Zellweger Uster Ag Verfahren und Vorrichtung zur Gewinnung von Messwerten, die dem Substanzquerschnitt von Textilmaterial, insbesondere von Faserbändern, entsprechen
DE2657603A1 (de) * 1976-12-18 1978-06-22 Truetzschler & Co Geraet zum messen eines faserbandes
US4100791A (en) * 1977-05-02 1978-07-18 Fiber Controls Corporation Auto-leveler
GB1599222A (en) * 1978-05-03 1981-09-30 Fiber Controls Corp Sliver auto-leveller
CH635373A5 (de) * 1979-04-06 1983-03-31 Zellweger Uster Ag Mess- und regeleinrichtung mit einem messtrichter zur bestimmung der durchzugskraft von faserbaendern.
US4306450A (en) * 1979-10-15 1981-12-22 Rieter Machine Works, Ltd. Apparatus for measuring a cross-sectional area of a travelling fiber sliver
SU1381207A1 (ru) * 1986-08-14 1988-03-15 Всесоюзный Научно-Исследовательский Институт Легкого И Текстильного Машиностроения Пневматический датчик линейной плотности волокнистого продукта
JPH0765250B2 (ja) * 1987-01-09 1995-07-12 中部精工株式会社 練条機
DE3713285A1 (de) * 1987-04-18 1988-11-03 Seydel Spinnereimasch Vorrichtung zum spleissen und verflechten von faserbaendern
US4947947A (en) * 1989-11-27 1990-08-14 Myrick-White, Inc. Sliver measuring apparatus with overload relief
RU2032780C1 (ru) * 1990-11-11 1995-04-10 Санкт-Петербургский институт текстильной и легкой промышленности им.С.М.Кирова Пневматический датчик линейной плотности волокнистого материала
US5361450A (en) * 1992-12-31 1994-11-08 Zellweger Uster, Inc. Direct control of fiber testing or processing performance parameters by application of controlled, conditioned gas flows
CH685506A5 (de) * 1993-06-23 1995-07-31 Zellweger Uster Ag Vorrichtung zur Messung der Masse oder des Substanzquerschnitts von Faserbändern und Verwendung der Vorrichtung.

Also Published As

Publication number Publication date
DE59603835D1 (de) 2000-01-13
JPH0913236A (ja) 1997-01-14
CN1071810C (zh) 2001-09-26
CN1142547A (zh) 1997-02-12
US5709011A (en) 1998-01-20
EP0750060A1 (fr) 1996-12-27
ATE187507T1 (de) 1999-12-15
CH690131A5 (de) 2000-05-15

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