EP0751243A1 - Dispositif pour mesurer l'épaisseur et/ou l'inégalité de rubans de fibres - Google Patents

Dispositif pour mesurer l'épaisseur et/ou l'inégalité de rubans de fibres Download PDF

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Publication number
EP0751243A1
EP0751243A1 EP96109123A EP96109123A EP0751243A1 EP 0751243 A1 EP0751243 A1 EP 0751243A1 EP 96109123 A EP96109123 A EP 96109123A EP 96109123 A EP96109123 A EP 96109123A EP 0751243 A1 EP0751243 A1 EP 0751243A1
Authority
EP
European Patent Office
Prior art keywords
measuring
adjustable
sliver
guide channel
adjustable part
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
EP96109123A
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German (de)
English (en)
Other versions
EP0751243B1 (fr
Inventor
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 EP0751243A1 publication Critical patent/EP0751243A1/fr
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Publication of EP0751243B1 publication Critical patent/EP0751243B1/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
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material

Definitions

  • the invention relates to a device for measuring the thickness and / or non-uniformity of fiber slivers, with a measuring part which has a channel-like guide channel for the fiber sliver and a scanning element which mechanically scans the fiber sliver and is adjustable relative to the guide channel.
  • Such a device is known for example from the patent specification CH-668 833.
  • This device contains a funnel-shaped compression member and a measuring member arranged thereon for measuring the thickness of a fiber sliver, which passes through a measuring channel for this purpose.
  • the sliver is scanned by a leaf spring, which is equipped with strain gauges and forms a scanning and measuring element.
  • the measuring channel with a semicircular cross section is channel-shaped.
  • the invention as characterized in the claims, thus solves the problem of creating a device which avoids the disadvantages mentioned and allows a more precise measurement of the thickness and / or irregularity of a fiber sliver.
  • the measuring channel has a part which contacts the fiber sliver and which is adjustable, which is also formed in a channel-like manner and is mounted on resilient supports.
  • the deflection of the adjustable part caused by the band is preferably recorded without contact.
  • the measuring device is thus separated from the part that is moved by the belt. This can also be ensured by the fact that the deflection is not detected on the adjustable part itself, but rather on the resilient supports.
  • the device according to the invention can be seen in particular in the fact that, on the one hand, the actual measuring element can be thermally and mechanically separated from those elements which are in contact with the sliver.
  • the device for the sliver now forms a measuring channel which has a circular or oval cross section, in any case thus forms a boundary surface which is continuous runs, i.e. has no strongly changing radii or corners.
  • This cross section can be completely filled in by the sliver. Because the measuring element and the element that is in contact with the sliver are not coupled, both are also easily interchangeable and the entire device can thus be easily adapted to the properties of the sliver. In addition, measuring elements with a larger measuring range can be used.
  • Figure 1 shows the device 1 according to the invention in its environment. These include a so-called inlet funnel 2 on one side of the device 1 and driven take-off rollers 3, 4 for the sliver on the other side.
  • the device 1 is arranged in a housing 5 in which a measuring part 6 and a measuring element 7 are mounted.
  • the measuring element 7 is here preferably designed as a distance meter, which can measure a distance without contact.
  • the measuring element 7 can, however, also be designed as a pressure or force meter which touches the measuring part 6, because the measuring principle used is irrelevant as long as it enables the desired measuring accuracy.
  • Mechanical distance meters are therefore also conceivable, in which there is a preferably releasable mechanical connection between the measuring part 6 and the measuring element 7.
  • FIG. 2 shows in particular the measuring part 6, which has a compression part 8, a guide channel 9, a scanning element 10 and deflectable supports 11 and 12.
  • the scanning element 10 is the part of the measuring part 6 which contacts the fiber sliver (not shown here) for the measurement and it consists of a fixed part 13 and a movable or adjustable part 14.
  • the scanning element 10 is also formed in a groove-like manner in an area contacting the fiber sliver and forms a type of guide channel 15. This is limited on the one hand by the fixed part 13 and on the other hand by the adjustable part 14 against the fiber sliver.
  • a closed flow channel 16 Seen in the direction of movement of the sliver, upstream of the guide channel 15 or the adjustable part 14, a closed flow channel 16 is provided, the cross-sectional area of which is larger than the cross-sectional area of the guide channel 15, which is indicated here by a corresponding choice of diameters. This also applies when the adjustable part 14 is in a maximally deflected position to the fixed part 13.
  • the guide channel 15 is preferably formed by two half-shells, each with a semicircular cross-section, one half-shell belonging to the fixed part 13 and one half-shell belonging to the movable part 14.
  • An outlet channel 17 is connected downstream of the guide channel 15 and, like the feed channel 16, has a larger cross section than the guide channel 15.
  • the fixed and the adjustable part 13, 14 of the measuring element 10 are separated from one another by a separating slot 18 which is in the range of the fixed and the adjustable Part has a section 19 in which it runs parallel to an axis 20 of the measuring part.
  • the separating slot 18 has radially extending sections 21 and 22 in the region of the ends of the adjustable part.
  • FIG. 3 shows a section through the measuring part 6 in the region of the guide channel 15.
  • the half-shells 23 and 24 and parts 25 and 26 of the separating slot 18 can be seen therein.
  • a thin cover 28 can optionally be attached to one of the half-shells 23 or 24 , which covers the separating slot 18 and prevents the sliver from becoming jammed therein.
  • other solutions are known to prevent this problem.
  • the feed channel 16, the guide channel 15 or the scanning element 10 and the outlet channel 17 can be seen again from FIG. 4, namely from a viewing angle rotated by 90 degrees compared to FIG. 2.
  • Figure 5 shows again in a view from the outside, the fixed part 13 and the movable part 14 and the carrier 11 and 12 which are resilient, such as a leaf spring.
  • FIG. 6 shows in a further embodiment the fixed part 13 and the movable part 14 ', which is only attached to a single carrier 12 here.
  • the movable part 14 can also be tilted more easily than the fixed part 13.
  • This additional movement can be detected by a further measuring system 29 in addition to the measuring system 7 already known from FIG. 1, or can be prevented by a guide acting in an area 30.
  • known strain gauges 33 can also be attached directly to the carrier 12. These are preferably connected to detachable connections in the inlet funnel 2, so that the measuring part shown can also be replaced in this case.
  • the operation of the device according to the invention is as follows:
  • the sliver runs in through the inlet funnel 2 and passes through the drawing part 3, in a manner known per se, pulled by the take-off rollers 3 and 4. It is compressed in the inlet funnel 2 and in the compression part 8 and thus reaches the feed channel 16.
  • the two half-shells 23, 24 or parts 13, 14 are more or less pushed apart against the force of the resilient carrier (s) 11, 12 in the scanning element 10.
  • the sliver then runs through the outlet part 17.
  • the movable part 14 becomes at least temporarily, for the duration or length a thick or thin point of the sliver repositioned, which is detected by the measuring element 7.
  • the position of the part 14 can also be detected via a section 27 of a carrier.
  • the position of the adjustable part 14 can also be detected at other or more points by a plurality of measuring elements 7, 29. This, for example, to monitor the parallelism of the two half-shells 23, 24 and to increase the measuring accuracy.
  • the movable part can also have a stop 31, which limits the movement of the movable part against the housing 5 and thus prevents the supports or measuring elements connected to them from being overstretched. Since the slivers to be measured can also cause a lot of dust, it is possible to blow air into the housing 5 through an opening 32 and thus build up an excess pressure which keeps the dust which could penetrate from below away.
  • the measuring part 6 can be easily replaced.
  • the measuring parts 6 can differ with respect to the shape of the half-shells 23, 24, the restoring force of the carriers 11, 12 or the mass of the adjustable part 14. In general, however, this measuring part 6 has a low mass and thus a high natural resonance frequency. In this way, even short errors in the sliver can be recorded.
EP96109123A 1995-06-29 1996-06-07 Dispositif pour mesurer l'épaisseur et/ou l'inégalité de rubans de fibres Expired - Lifetime EP0751243B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH190895 1995-06-29
CH1908/95 1995-06-29
CH190895 1995-06-29

Publications (2)

Publication Number Publication Date
EP0751243A1 true EP0751243A1 (fr) 1997-01-02
EP0751243B1 EP0751243B1 (fr) 1999-12-08

Family

ID=4221413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109123A Expired - Lifetime EP0751243B1 (fr) 1995-06-29 1996-06-07 Dispositif pour mesurer l'épaisseur et/ou l'inégalité de rubans de fibres

Country Status (5)

Country Link
US (1) US5697247A (fr)
EP (1) EP0751243B1 (fr)
JP (1) JPH0913237A (fr)
CN (1) CN1157909A (fr)
DE (1) DE59603836D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH701226A1 (de) * 2009-06-04 2010-12-15 Uster Technologies Ag Vorrichtung und verfahren zur messung der masse eines bewegten faserbandes.

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1302166B1 (it) * 1997-09-17 2000-07-31 Truetzschler & Co Dispositivo su uno striratoio per la misura di una nastro di fibrecomposito formato da nastri di fibre
US7103440B2 (en) * 2001-12-11 2006-09-05 Rieter Ingolstadt Spinnereimaschinenbau Ag Use of microwaves for sensors in the spinning industry
DE10214955B9 (de) * 2002-04-04 2017-06-29 Rieter Ingolstadt Gmbh Spinnereivorbereitungsmaschine
DE10327469B4 (de) * 2002-07-06 2016-03-10 Rieter Ingolstadt Gmbh Bandquerschnittsmesseinrichtung
DE10233289B4 (de) * 2002-07-22 2015-12-24 Rieter Ingolstadt Gmbh Strecke sowie Bandstausensor
CN102207373B (zh) * 2011-03-28 2013-06-12 南通宏大实验仪器有限公司 一种用于纤维须条均匀度检测的数据采集系统及其处理方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1510487A1 (de) * 1966-03-10 1971-05-13 Zinser Textilmaschinen Gmbh Verfahren und Vorrichtung zur Steuerung oder Regelung der Bandstaerke von Faserbaendern auf Spinnereivorbereitungsmaschinen
DE2320369A1 (de) * 1972-05-01 1973-11-15 Maremont Corp Vorrichtung zum feststellen von dickeunterschieden in stapelfaserbaendern
FR2183903A3 (fr) * 1972-05-10 1973-12-21 Rieter Ag Maschf
EP0069833A1 (fr) * 1981-07-13 1983-01-19 Zellweger Uster Ag Méthode et procédé pour déterminer la densité de bandes fibreuses
CH668833A5 (de) * 1986-01-16 1989-01-31 Zellweger Uster Ag Vorrichtung zum messen und/oder vergleichmaessigen der banddicke von faserbaendern.
DE9404333U1 (de) * 1993-04-02 1994-08-04 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserverbandes mit einer Bandführung zum Führen der Faserbänder am Streckwerkseinlauf

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE150487C (fr) *
GB1226082A (fr) * 1968-01-31 1971-03-24
US3925850A (en) * 1973-11-01 1975-12-16 Fibers Controls Corp Density sensing and controlling equipment
US3990292A (en) * 1974-12-13 1976-11-09 General Electric Company Frequency modulated fluidic gauge
US4122703A (en) * 1976-11-24 1978-10-31 Davis Jesse B Method and apparatus for reeling discrete yarn strand patterns
DE2657603A1 (de) * 1976-12-18 1978-06-22 Truetzschler & Co Geraet zum messen eines faserbandes
CH635373A5 (de) * 1979-04-06 1983-03-31 Zellweger Uster Ag Mess- und regeleinrichtung mit einem messtrichter zur bestimmung der durchzugskraft von faserbaendern.
DE3237357C2 (de) * 1982-01-18 1985-12-19 Zellweger Uster Ag, Uster Vorrichtung zur Messung charakteristischer Merkmale von Fasermaterial
IT1179098B (it) * 1984-09-06 1987-09-16 Cselt Centro Studi Lab Telecom Perfezionamenti alle apparecchiature a condensatore per la misura del diametro di fibre dielettriche
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
DE4404326A1 (de) * 1993-04-02 1994-10-06 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserbandes mit einer Bandführung zum Führen der Faserbänder am Streckwerkseinlauf

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1510487A1 (de) * 1966-03-10 1971-05-13 Zinser Textilmaschinen Gmbh Verfahren und Vorrichtung zur Steuerung oder Regelung der Bandstaerke von Faserbaendern auf Spinnereivorbereitungsmaschinen
DE2320369A1 (de) * 1972-05-01 1973-11-15 Maremont Corp Vorrichtung zum feststellen von dickeunterschieden in stapelfaserbaendern
FR2183903A3 (fr) * 1972-05-10 1973-12-21 Rieter Ag Maschf
EP0069833A1 (fr) * 1981-07-13 1983-01-19 Zellweger Uster Ag Méthode et procédé pour déterminer la densité de bandes fibreuses
CH668833A5 (de) * 1986-01-16 1989-01-31 Zellweger Uster Ag Vorrichtung zum messen und/oder vergleichmaessigen der banddicke von faserbaendern.
DE9404333U1 (de) * 1993-04-02 1994-08-04 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserverbandes mit einer Bandführung zum Führen der Faserbänder am Streckwerkseinlauf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH701226A1 (de) * 2009-06-04 2010-12-15 Uster Technologies Ag Vorrichtung und verfahren zur messung der masse eines bewegten faserbandes.

Also Published As

Publication number Publication date
JPH0913237A (ja) 1997-01-14
US5697247A (en) 1997-12-16
CN1157909A (zh) 1997-08-27
EP0751243B1 (fr) 1999-12-08
DE59603836D1 (de) 2000-01-13

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