WO1998018985A1 - Organe de mesure d'entree pour dispositif d'etirage - Google Patents

Organe de mesure d'entree pour dispositif d'etirage Download PDF

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Publication number
WO1998018985A1
WO1998018985A1 PCT/CH1997/000394 CH9700394W WO9818985A1 WO 1998018985 A1 WO1998018985 A1 WO 1998018985A1 CH 9700394 W CH9700394 W CH 9700394W WO 9818985 A1 WO9818985 A1 WO 9818985A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring
parameter
drafting system
drafting
measured
Prior art date
Application number
PCT/CH1997/000394
Other languages
German (de)
English (en)
Inventor
François BAECHLER
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
Priority to EP97943715A priority Critical patent/EP0935683A1/fr
Priority to JP10519848A priority patent/JP2001502763A/ja
Priority to US09/284,870 priority patent/US6058570A/en
Publication of WO1998018985A1 publication Critical patent/WO1998018985A1/fr

Links

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
    • 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

Definitions

  • the invention relates to a method and a device for detecting a parameter on a plurality of conveyors fed to a drafting system
  • a drafting system is known with which several incoming bands of textile fibers, which are removed from several cans, are combined and stretched into a single, uniform band.
  • This drafting device has a measuring device at the inlet, which is intended to detect cross-sectional or mass fluctuations on several belts. This measuring device extends over all incoming belts. captures all tapes together and outputs a single measured value for all tapes together
  • Such known devices can collectively detect a large number of tapes capacitively or can scan them mechanically, for example via pressure rollers. If pressure rollers are provided, the pressure exerted on the belts is usually quite high in order to obtain precise measured values. The properties of the strips are already changed and connected to one another in such a way that the subsequent stretching process is impaired.
  • the measurement is influenced, for example, by moisture. This can act on all of the belts from the outside, or it can only hit individual belts, for example because their cans were more exposed to moisture than the other belts before stretching.
  • the known methods and devices therefore work with measuring values that are not very precise or with tapes that have already been unfavorably pretreated.
  • the invention as characterized in the claims, therefore solves the problem of creating a method and a device of the type mentioned, which give a more precise measured value and thereby influence the tapes as little as possible.
  • the invention as characterized in the patent claims, therefore solves the problem of creating a method and a device of the type mentioned which give a more precise measured value and thereby influence the band as little as possible
  • the inlet measuring device has several measuring elements individually assigned to the bands, all of which are connected to a computer, which can be used for the control process in the system Provide a single measurement signal that is composed of the individual measured values output by the measuring elements.
  • the measuring elements are provided at the outlet of the cans and are preferably part of a device for removing the strip from the can. This results in distances of different lengths between the measuring elements and the entrance of the Drafting device when the cans are arranged in a row
  • the advantages achieved by the invention can be seen in particular in that the individual bands cannot influence one another during the measurement and thus more precise values are available on the incoming bands via measured parameters.
  • the individual measuring elements can be designed so that they are very easy respond quickly to changes in the parameter and also give these changes quickly and precisely as a measured value.
  • Measuring elements that mechanically scan the strip and for which the strip must be indicated in the area of the measuring element can also be used here.
  • FIGS. 1 and 4 each show a schematic representation of the structure of a regulated drafting system with an inlet measuring device
  • Figure 2 shows a measuring element for Emlaufmessvor ⁇ chtung
  • Figures 3 and 5 each show a schematic representation of a structure of a computer for processing the signals of the individual measuring elements
  • Figure 6 is a schematic representation of the processing of measured values for the control of the drafting system
  • drafting system 1 which, in a manner known per se, consists of several pairs of rollers 2, 3, 4, of which only one roller is visible here.
  • Downstream of the drafting system 1 is a belt separator 5, a calender roller 6 and a can 7 Recording regulated belt These are also known elements.
  • deflection rollers 8 and eight measuring elements 9a, 9b, 9c, 9d, 9e, 9f, 9g, 9h and eight cans 10a-10h are provided for eight bands 11a-11h 12a-12h connect all measuring elements 9 in parallel to a computer 13, which is also connected to an operating unit 14 and a tachometer generator 15, which is arranged, for example, on an auxiliary line 16 for the measuring elements 9.
  • the measuring elements 9 can be part of a device for removing the tape 11 be from a can 10
  • a Control motor 17 and a main motor 18 are provided, which are connected on the one hand to a servo drive 19 and on the other hand to the roller pairs 2, 3, 4 and the calender roller 6
  • FIG. 2 shows a measuring element 9 for a band 11. It consists, for example, of a specified roller 20 and an idler roller 21, which is supported on a lever 23 so as to be deflectable about an axis of rotation 22.
  • the roller 20 has, for example, a groove for the band 11 in which can also roll the roller 21 to scan the tape 1 1
  • FIG. 3 schematically shows a possible structure for the computer 13.
  • a delay element 25 with regions 25a-25h for separately delaying each signal associated with a measuring element 9a-9h and a summer 26 are provided.
  • the renewal stage 27 has at least one input 33 for renewal parameters.
  • the delay element 25 has an input 34 for a speed and inputs 40a b is 40h for distances over which the degree of deceleration in the individual areas 25a to 25h can be determined.
  • the delay stage 28 also has an input 41 for the belt speed and an input 42 for entering a distance or path for the belt 11
  • FIG. 4 shows a drafting device 1 with an inlet measuring device as already shown in the diagram in FIG. 1. For this reason, the same reference numerals are used for the same elements. This is also the case if they are not entered here. However, this differs 4 in that the measuring elements 9a-9h are connected to the computer 13 via a data bus 35 in Sene
  • FIG. 5 shows a structure for a computer 13 similar to FIG. 3. For this reason, the same elements are provided with the same reference numerals. However, the delay element 25 is preceded by a separate interface 24, to which the data bus 35 with the measuring elements 9 is connected
  • line 45 and controller 46 are shown here with the important signal processing functions.
  • 47a to 47h denote interferences or band errors here Measuring locations 48a 48b 48h can be recorded However, for the sake of a better overview, only fault sizes 47a, 47b and 47h are shown. Corresponding fault sizes and associated elements are actually present in the same number as the bands 49a, 49b 49h for the controller 46 After the measuring locations 48, the gate sizes are moved during different times, which are different for each belt, until they reach the actual drafting system or a reference point 39.
  • Each belt 11 entering the drafting device 1 is previously scanned in a measuring element 9 for the acquisition of a parameter.
  • Weight, thickness, mass, etc. are preferably conceivable as parameters as absolute values, or relative values such as changes in weight, thickness or mass.
  • Such parameters are recorded in a measuring element 9, as shown in FIG. 2.
  • the volume 21 used by the belt 1 on the roller 20 deflects the roller 21, which is converted into an output signal which is proportional to this deflection.
  • the output signals of all measuring elements 9 are generally fed to the computer 13 via the data bus 35 or in parallel via the lines 12, which calculates a single output signal representing the amount of the relevant parameter from all the output signals, which is fed to the servo drive 19.
  • the drafting system 1 is thus regulated in a manner known per se and therefore not shown in more detail here.
  • the output signals arrive via the bus 35 in the se ⁇ ellen interface 24 in the computer 13, they are individually delayed in the delay element 25 so that the different distance A (Fig. 4) of the individual measuring elements 9, or the deflection rollers 8 along the belts 11 to first roller pair 2 or another selectable reference point 39 in or in front of the drafting device 1 is compensated as if these measuring elements 9 were located at the relevant selectable reference point 39.
  • the values delayed in this way are then summed to a value in the summer 26 and this is linearized in the linearization stage 27. If necessary, a delay common to all signals is added in the delay stage 28, which is only necessary if the said reference point 39 is provided and is at a distance B in front of a position 56 of the drafting unit 1.
  • the distances A and B can also be compensated together in the delay element 25.
  • the digital / analog converter 29 the values now present for the parameter of all the bands 11 are converted into an analog signal and output to the servo drive 19 via the output 30. If the output signals arrive via the lines 12, the output signals are multiplexed in the multiplexer 36 and digitized in the converter 37 before they are demultiplexed again in the demultiplexer 38 and individually delayed in the delay element 25, as is known
  • the measurement signals are subjected to the same delays and links as the individual bands or the interference signals which affect the bands. Parameters to achieve such delays can be entered into the controller 13 via the inputs 40 and 42
  • measuring elements than those shown in FIG. 2 can also be used for one parameter.
  • other measuring elements are also necessary if other parameters such as fiber fineness or color are to be used for the control of the drafting device 1.
  • Such further measuring elements or measuring principles are, for example, in the Swiss Patent application no CH 2128/95 shown
  • the methods and devices according to the invention can also be used in combined open and closed control loops or can be combined with monitoring of the emerging belt.
  • the computer 13 is connected to the belt hopper 5 via a line 59, as shown in FIG.
  • each band could be monitored to ensure that certain conditions were met Threshold value are compared to ensure that there is a band at all or that the band reaches a minimum volume. If such conditions are not met, the route could be shut down.
  • Threshold value could also be carried out by Regulation 13 the.
  • the invention can be applied to drafting systems such as are provided in particular in draw frames, combers, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Paper (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant de mesurer un paramètre sur plusieurs rubans (11) amenés à un dispositif d'étirage régulé. Pour permettre l'obtention d'une valeur de mesure plus exacte et également d'influer le moins possible sur les rubans, plusieurs éléments de mesure (9) sont associés individuellement aux rubans, les valeurs de mesure données par lesdits éléments de mesure étant convertis en une seule valeur de mesure utilisée pour la régulation.
PCT/CH1997/000394 1996-10-30 1997-10-21 Organe de mesure d'entree pour dispositif d'etirage WO1998018985A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97943715A EP0935683A1 (fr) 1996-10-30 1997-10-21 Organe de mesure d'entree pour dispositif d'etirage
JP10519848A JP2001502763A (ja) 1996-10-30 1997-10-21 練条機のための流入測定部材
US09/284,870 US6058570A (en) 1997-10-21 1997-10-21 Inflow sensor for a drawing equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2670/96 1996-10-30
CH267096 1996-10-30

Publications (1)

Publication Number Publication Date
WO1998018985A1 true WO1998018985A1 (fr) 1998-05-07

Family

ID=4238934

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000394 WO1998018985A1 (fr) 1996-10-30 1997-10-21 Organe de mesure d'entree pour dispositif d'etirage

Country Status (5)

Country Link
EP (1) EP0935683A1 (fr)
JP (1) JP2001502763A (fr)
CN (1) CN1080332C (fr)
TW (1) TW344765B (fr)
WO (1) WO1998018985A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000248434A (ja) * 1999-02-26 2000-09-12 Truetzschler Gmbh & Co Kg まとめられたスライバーを形成するために練条機に組込まれる装置
GB2329477B (en) * 1997-09-17 2002-01-02 Truetzschler & Co Device on a draw frame for measuring a fibre sliver combination
US7735202B2 (en) 2005-05-20 2010-06-15 Truetzscler Gmbh & Co. Kg Apparatus on a spinning preparation machine for ascertaining the mass and/or fluctuations in the mass of a fibre material
US7765648B2 (en) 2005-07-13 2010-08-03 Truetzschler Gmbh & Co. Kg Apparatus for detecting a parameter at a plurality of slivers fed to a drafting system of a spinning machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114351309B (zh) * 2021-12-06 2023-03-21 广东职业技术学院 一种混纺比可变的等线密度纱线的制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204717A1 (fr) * 1972-10-30 1974-05-24 Zellweger Uster Ag
DE3212891A1 (de) * 1982-04-06 1983-10-06 Zinser Textilmaschinen Gmbh Verfahren zum betreiben einer strecke und strecke
JPS6094626A (ja) * 1983-10-21 1985-05-27 Ishikawa Seisakusho:Kk 練条機におけるスライバ−斑制御方法とその装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204717A1 (fr) * 1972-10-30 1974-05-24 Zellweger Uster Ag
DE3212891A1 (de) * 1982-04-06 1983-10-06 Zinser Textilmaschinen Gmbh Verfahren zum betreiben einer strecke und strecke
JPS6094626A (ja) * 1983-10-21 1985-05-27 Ishikawa Seisakusho:Kk 練条機におけるスライバ−斑制御方法とその装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 237 (C - 305) 24 September 1985 (1985-09-24) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329477B (en) * 1997-09-17 2002-01-02 Truetzschler & Co Device on a draw frame for measuring a fibre sliver combination
JP2000248434A (ja) * 1999-02-26 2000-09-12 Truetzschler Gmbh & Co Kg まとめられたスライバーを形成するために練条機に組込まれる装置
JP2010229618A (ja) * 1999-02-26 2010-10-14 Truetzschler Gmbh & Co Kg まとめられたスライバーを形成するために練条機に組込まれる装置
US7735202B2 (en) 2005-05-20 2010-06-15 Truetzscler Gmbh & Co. Kg Apparatus on a spinning preparation machine for ascertaining the mass and/or fluctuations in the mass of a fibre material
US7765648B2 (en) 2005-07-13 2010-08-03 Truetzschler Gmbh & Co. Kg Apparatus for detecting a parameter at a plurality of slivers fed to a drafting system of a spinning machine
DE102005033180B4 (de) * 2005-07-13 2020-03-12 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum Erfassen eines Parameters an mehreren, einem Streckwerk einer Spinnereimaschine zugeführten Faserbändern

Also Published As

Publication number Publication date
CN1235649A (zh) 1999-11-17
JP2001502763A (ja) 2001-02-27
TW344765B (en) 1998-11-11
EP0935683A1 (fr) 1999-08-18
CN1080332C (zh) 2002-03-06

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