EP0044408B1 - Procédé de surveillance d'une installation pour le mélange de fibres textiles et dispositif pour la mise en oeuvre de ce procédé - Google Patents

Procédé de surveillance d'une installation pour le mélange de fibres textiles et dispositif pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0044408B1
EP0044408B1 EP81104610A EP81104610A EP0044408B1 EP 0044408 B1 EP0044408 B1 EP 0044408B1 EP 81104610 A EP81104610 A EP 81104610A EP 81104610 A EP81104610 A EP 81104610A EP 0044408 B1 EP0044408 B1 EP 0044408B1
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EP
European Patent Office
Prior art keywords
fibres
fibre
measuring device
quantity measuring
fed
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
Application number
EP81104610A
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German (de)
English (en)
Other versions
EP0044408A1 (fr
Inventor
Rudolf Wildbolz
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.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to AT81104610T priority Critical patent/ATE13448T1/de
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Publication of EP0044408B1 publication Critical patent/EP0044408B1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G7/00—Breaking or opening fibre bales
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G13/00—Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres

Definitions

  • the present invention relates to a method for monitoring a mixing system for textile staple fibers of different types, in which each type is conveyed from a fiber metering unit to a mixing device and the fibers mixed in it are fed to a storage device, and in which during the feed times the the amount of fiber supplied to the storage device is somewhat larger than the amount of fiber taken from this storage device and as a result the fiber supply from the dosing units to the storage device is interrupted during repetitive time intervals, the dosing units delivering fibers individually and in succession during such time intervals, the latter being used to monitor those of the Dosing units in normal mixed operation conveyed fiber quantity fed to a quantity measuring device and measured.
  • Fiber mixtures which consist of fibers of different types or types.
  • it can be a mixture of natural and synthetic fibers or fibers of different colors or different quality. It is important that the fiber mixtures, as well as threads spun or twisted from them, are of a uniform quality.
  • the fibers or fiber flakes emerging from the mixing plant must have a mixing ratio which lies within clearly defined tolerance limits. If this is, for example, a source material for the manufacture of articles in the clothing industry, tolerance limits which have not been observed can mean a violation of legal regulations.
  • the monitoring methods already known in which the monitoring takes place during the time intervals during which the fiber supply to the storage or filling shaft is interrupted, have the disadvantage of relatively great inaccuracy.
  • the reason for this is that during the start-up and run-down phase of the conveyance, the amount of fiber conveyed by an individually working dosing unit for the purpose of monitoring deviates greatly from the normally conveyed amount of fibers of constant value. If one wants to get rid of the inaccuracy caused by these deviations, the disadvantage of a longer measuring time has to be accepted. This means that more fiber material has to be used for the measurement operation and the measurements can be carried out less often. As a result, monitoring becomes worse and more expensive.
  • the individually operated dosing unit can be run for a relatively long time, so that the deviations from the fiber quantity constant value occurring during the start-up and run-down phase are hardly significant. In this case, however, a standstill of the machine following the mixing plant must be accepted during the monitoring process.
  • a sufficient accuracy of the mixing ratio should be ensured in a simple manner and the disadvantages mentioned should be eliminated in that the conveyed fibers are fed to the quantity measuring device and measured only in such partial areas within repeating time intervals during which there is constant fiber conveyance.
  • the device for carrying out the method comprises a mixing system which comprises a plurality of fiber metering units and, arranged downstream of this, a mixing device and a storage device, the device having a first switch and a quantity measuring device connected thereto. It is characterized in that a second switch is provided between the first switch and the quantity measuring device for selectively guiding or deflecting fibers to and from the quantity measuring device.
  • the invention results in a very reliable and precise monitoring of different types of fibers or fiber flakes, so that the fiber quantities supplied by the fiber metering units to the mixing device can be dimensioned and kept constant in accordance with prescribed values, and thus the mixing ratio can be exactly maintained.
  • the machines fed with the mixed fibers for their further processing do not need to be stopped in order to carry out the monitoring process.
  • H. monitoring can be done while these machines are operating normally.
  • the individual monitoring according to the present invention can be carried out at much shorter time intervals. This gives the very important advantages that deviations from target values are recognized earlier and that relatively short-term fluctuations can also be determined.
  • the device shown in Fig. 1 has two or more fiber metering units 11 (11.1 and 11.2), which, as indicated by arrows 12, fiber material, which largely consists of fiber flakes, but also contains individual fibers, is supplied.
  • fiber material which largely consists of fiber flakes, but also contains individual fibers.
  • the metering units 11 are designed in such a way that they continuously promote a constant and selectable amount of weight of fibers during operation per unit time. Fibers of a certain type are fed to each metering unit 11, fibers of different types reaching the different units 11.1 and 11.2. The amount of fibers conveyed by the different units 11 per unit time will generally be different.
  • An example of a practical application is, for example, a conveyance of 67% cotton in the metering unit 11.1 and a conveyance of 33% polyester in the metering unit 11.2, the percentages denoting the ratio by weight of the fiber quantities conveyed per unit of time.
  • two to four dosing units 11 are used at the same time.
  • a mixing device 13 Following the metering units 11 there is a mixing device 13 and after this a first switch 14. From the latter, in one continuous position of the switch 14, the fibers arrive at a store 15 and from there to subsequent further processing machines, for example cards 16.
  • the fibers are conveyed to a second switch 17 , through which they either reach a collecting container 18 in their continuous position or a quantity measuring device 19, for example a balance, in their switched position.
  • the arrangement with the parts 17, 18 and 19 is used to measure the fiber quantities conveyed by the fiber metering units 11 and is illustrated again in detail in FIG. 2.
  • pneumatic conveying of the fibers by tubes is required.
  • the fiber webs designed as tubes 25 and 26 lead from the second switch 17 to the quantity measuring device 19 or to the receptacle 18.
  • the quantity measuring device 19 designed as a scale is constructed in such a way that the fibers fed to it can be weighed by means of a weighing element 27.
  • An evaluation device 30 is connected to the weighing member 27 via an electrical connection 29. It has a keypad 31 for entering information, an information output point 32 and a display point 33.
  • the memory 15 is provided with a signal device 20 which supplies a signal when the memory 15 is at a minimum and at a maximum filling level.
  • the monitoring of the fill level can e.g. by light barriers provided in the memory 15 or by the weight exerted by the fibers.
  • the signals of the device 20 are fed to a control device 34, which may be located in the evaluation device 30, for example.
  • one type of fiber is continuously fed to one of the fiber metering units 11.
  • the fibers conveyed by each of the metering units 11 enter the mixing device 13, where they are mixed with one another. If, as is assumed in this example, the fibers are conveyed pneumatically through pipes, mixing is automatically obtained in the pipe supplied by the metering units 11, so that it works as a mixing device.
  • the switch 14 is set such that the mixed fibers go to the store 15 and from there to the machines used for further processing, e.g. card 16.
  • the data desired for the production and the corresponding mixing ratio are entered into the evaluation device 30 and stored therein.
  • the fiber metering units 11 are stopped. This is followed by a rinsing time during which the fibers still present in the fiber webs are transported to the store 15. If a monitoring operation is now programmed, the switch 14 is changed from the continuous to the deflecting position and at the same time the unit to be monitored, e.g. B. the dosing unit 11.1 switched on, so that only these fibers deliver. The latter reach the collecting container 18 via the switches 14 and 17.
  • the switch 17 After a short running-in period, after which the corresponding fiber metering unit 11.1 has reached its normal production again, the switch 17 is positioned from the direct passage to the deflected passage, so that the fibers no longer to the receptacle 18, but to the quantity measuring device 19.
  • the duration of the fiber supply to the quantity measuring device 19 is determined by the data initially entered by means of the keypad 31. After this fiber supply to the quantity measuring device 19 has ended, the switch 17 is switched back to direct passage in the direction of the collecting container 18. At the same time, the individually operated fiber metering unit 11.1 is brought to a standstill.
  • the switch 14 is also reset to a passage running through to the store 15, whereby the system is again ready for normal operation. It is switched on again as soon as the signal indicating the minimum fill value of the memory 15 is sent by the signal device 20.
  • the weighing of the material introduced into the quantity measuring device 19 can be carried out automatically happen, the weight can be read at the display point 33.
  • the weight of the fibers, which are introduced into the quantity measuring device 19 by the various units 11 during the monitoring processes, can also be continuously printed on an information strip which is running out at the information output point 32.
  • the process just described is illustrated for the sake of clarity in FIG. 3.
  • the timing is in the abscissa direction.
  • the straight lines indicate that the facility in question is in operation.
  • the metering units 11 and the cards 16 operate during the normal mixing process (before the time t1).
  • the switch 14 is in the position (14d) which is continuous with the store 15.
  • the switch 14 remains in the position (14d) which is continuous to the store 15 during the first rinsing time, which lasts from time t1 to time t2.
  • the switch 14 is switched to be conducted whereby the fibers in the starting g e-deflected direction (14s) to the points 17 out.
  • the latter is set for direct passage (17d) to the container 18.
  • the unit 11.1 is being monitored, for example, it is put back into operation.
  • the switch 17 is switched (17s), as a result of which the fibers reach the quantity measuring device 19.
  • the supply of fibers to the quantity measuring device 19 takes place in the partial area lying between the times t3 and t4 of the time interval lasting from the time t1 to the time t7.
  • the switch 17 is switched back to direct passage (17d) at time t4.
  • the metering unit 11.1 is switched off again, and the remaining fibers still present in the fiber channels are then washed away into the container 18, which is ended at time t6.
  • the metering units 11 are put into operation again and the switch 14 is switched back to direct passage (14d) to the memory 15 at the latest at this time t7 .
  • the total amount of fibers supplied by them during a given time interval that is the amount of fibers F shown in the exemplary embodiment in FIG. 3 below, is weighed and the time difference between t2 and t6 is selected.
  • the inaccuracy of the measurement caused by the increasing and decreasing fiber quantities in the start-up or run-down phase (from t2 to t3 or from t5 to t6) is accepted with this type of monitoring.
  • Another monitoring method tries to eliminate the error caused by the inaccurate measurement in the start-up and run-down phase by selecting the fiber quantities used for the measurement sample to be relatively large, so that this inaccuracy is practically insignificant compared to the total amount of fibers falls. Monitoring according to this latter method is not possible without interrupting the operation of the cards 16 or another subsequent machine.
  • the amount of fiber limited to the partial area between the times t3 and t4 is now removed for the measurement. Since the amount of fiber conveyed per unit of time is constant over this entire area, there are no deviations from the correct amount of fiber actually conveyed within the partial area (t3 ... t4) on which the measurement is based from the metering unit to be monitored.
  • the one dosing unit delivers 850 g and the second dosing unit 150 g fibers per weighing, i.e. for a period of 12s. These quantities are called batches. If it is desired that the batches are of equal weight for the monitoring, the measuring times entered (into the keypad 31 of the evaluation device 30) with a total measuring time of 24 s for the two units 11.1 and 11.2 for the dosing unit 3 delivering 85% of the fibers , 6 s and 20.4 s for the dosing unit delivering 15% of the fibers.

Claims (10)

1. Procédé pour surveiller une installation mélangeuse pour fibres textiles discontinues de différentes sortes, installation dans laquelle chaque sorte de fibres, en provenance de chaque unité de dosage de fibres, est transportée vers un dispositif mélangeur, et les fibres qui sont mélangées entre elles, sont dirigées vers un silo, procédé dans lequel, pendant les périodes d'alimentation du silo, la quantité de fibres dirigée vers le silo est un peu plus grande que la quantité de fibres extraites du silo, ce qui a pour conséquence que, pendant des intervalles de temps qui se répètent, la livraison de fibres depuis les unités de dosage vers le silo est interrompue, et où, pendant de tels intervalles de temps, les unités de dosage livrent des fibres individuellement et les unes après les autres, fibres qui sont guidées vers un dispositif de mesure de quantités où elles sont mesurées, pour la surveillance de la quantité de fibres transportée depuis les unités de dosage pendant la marche normale de mélange, caractérisé par le fait que les fibres transportées sont amenées vers le dispositif de mesure de quantités (19) et sont mesurées seulement pendant de tels sous-domaines (t3...t4) à l'intérieur des intervalles de temps (t1...t7) se répétant, pendant lesquelles un transport de fibres constant est effectué.
2. Procédé selon revendication 1, caractérisé par le fait que, de la quantité totale des fibres (F) qui sont transportées pendant un intervalle de temps (t1.. .t7), des fibres qui se trouvent en dehors d'un sous-domaine (t3...t4) d'un transport de fibres constant sont amenées vers un réservoir de réception (18).
3. Procédé selon revendication 1, caractérisé par le fait que les fibres sont transportées pneu- matiquement.
4. Dispositif pour l'exécution du procédé, selon revendication 1, dans une installation mélangeuse qui est constituée d'une pluralité d'unités de dosage de fibres, et d'un dispositif de mélange, ainsi que d'un silo, disposés après ces unités de dosage, dispositif qui possède un premier aiguillage et un dispositif de mesure de quantités relié à celui-ci, caractérisé par le fait qu'un deuxième aiguillage (17) est prévu entre le premier aiguillage (14) et le dispositif de mesure de quantités (19) pour amener les fibres, selon les besoins, vers le dispositif de mesure de quantités (19) respectivement pour les dévier de celui-ci.
5. Dispositif selon revendication 4, caractérisé par le fait qu'un dispositif de commande (34) est prévu, qui sert à la commande du premier aiguillage (14), du deuxième aiguillage (17) ainsi qu'à la mise à l'arrêt et à la mise en marche des unités de dosage de fibres (11), commandées individuellement.
6. Dispositif selon revendication 4, caractérisé par le fait qu'un dispositif de commande (34) est prévu, et qui sert à la commande du dispositif de mesure de quantités (19) et à l'enregistrement automatique des valeurs de mesures à l'aide de l'endroit de sortie d'informations (32).
7. Dispositif selon revendication 4, caractérisé par le fait que le dispositif de mesure de quantités (19) est une balance qui sert à peser des fibres.
8. Dispositif selon revendication 6, caractérisé par le fait que le silo (15) est pourvu d'un dispositif de signalisation (20) qui sert à produire un signal au moment où un état de remplissage minimum ou maximum du silo (15) est atteint, et que le dispositif de signalisation (20) est relié avec le dispositif de commande (30).
9. Dispositif selon revendication 2, caractérisé par le fait que, lorsque l'on utilise deux unités de dosage de fibres (11), les proportions de mélange en poids d'une de sortes de fibres sont situées entre 10 et 90%.
10. Dispositif selon revendication 2, caractérisé par le fait que le dispositif de mesure de quantités (19) possède une capacité d'emmagasinement pour pouvoir accumuler au moins dix pesées partielles de chacune 500 grammes de fibres.
EP81104610A 1980-07-23 1981-06-15 Procédé de surveillance d'une installation pour le mélange de fibres textiles et dispositif pour la mise en oeuvre de ce procédé Expired EP0044408B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104610T ATE13448T1 (de) 1980-07-23 1981-06-15 Verfahren zum ueberwachen einer mischanlage fuer textile stapelfasern und vorrichtung zu dessen durchfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH561080 1980-07-23
CH5610/80 1980-07-23

Publications (2)

Publication Number Publication Date
EP0044408A1 EP0044408A1 (fr) 1982-01-27
EP0044408B1 true EP0044408B1 (fr) 1985-05-22

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Application Number Title Priority Date Filing Date
EP81104610A Expired EP0044408B1 (fr) 1980-07-23 1981-06-15 Procédé de surveillance d'une installation pour le mélange de fibres textiles et dispositif pour la mise en oeuvre de ce procédé

Country Status (8)

Country Link
US (1) US4399590A (fr)
EP (1) EP0044408B1 (fr)
JP (1) JPS5751819A (fr)
AT (1) ATE13448T1 (fr)
BR (1) BR8104737A (fr)
DE (1) DE3170585D1 (fr)
ES (1) ES8302130A1 (fr)
IN (1) IN154895B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151063C2 (de) * 1981-12-23 1984-05-24 Trützschler GmbH & Co KG, 4050 Mönchengladbach Verfahren und Vorrichtung zum Mischen von Textilfasern
DE3360334D1 (en) * 1982-05-04 1985-08-08 Rieter Ag Maschf Method of opening fibre bales
JPS59116424A (ja) * 1982-12-22 1984-07-05 Nippon Spindle Mfg Co Ltd 混打綿機に対する原綿自動供給方法
AU629231B2 (en) * 1988-09-06 1992-10-01 Maschinenfabrik Rieter A.G. A method of blending textile fibres
DE3919746A1 (de) * 1989-06-16 1990-12-20 Rieter Ag Maschf Verfahren zum mischen von textilfasern
EP0409772A1 (fr) * 1989-07-18 1991-01-23 Maschinenfabrik Rieter Ag Procédé de traitement optimal des fibres textiles d'une provenance différente
EP0622480A1 (fr) * 1993-04-20 1994-11-02 Maschinenfabrik Rieter Ag Procédé de dosage des quantités préalablement déterminées de flocons de fibres de qualité et/ou de couleur différente
DE10053353B4 (de) * 2000-10-27 2013-06-06 Hubert Hergeth Bandwaage
US8030000B2 (en) * 2002-02-21 2011-10-04 Alere San Diego, Inc. Recombinase polymerase amplification
CN104846498A (zh) * 2015-06-16 2015-08-19 李先登 高效全时空混棉纺纱方法
CN110055649B (zh) * 2019-05-15 2021-06-08 江南大学 混纺纱的智能生产方法

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US2156893A (en) * 1938-10-07 1939-05-02 Henry A Wallace Cotton sampler apparatus
US2166811A (en) * 1939-01-17 1939-07-18 Henry A Wallace Cotton sample selecting device
US2320544A (en) * 1941-07-30 1943-06-01 George E Gaus Cotton sampler apparatus
US3110182A (en) * 1959-12-23 1963-11-12 Botany Ind Inc Cotton sampling apparatus
FR1374523A (fr) * 1963-08-30 1964-10-09 Installation de filature automatique
CH472514A (de) * 1965-07-21 1969-05-15 Fiber Controls Corp Zyklisch arbeitende Steuerungseinrichtung zum Abmessen und Ausgeben von Material
US4103398A (en) * 1977-07-05 1978-08-01 Wise Industries, Inc. Method and apparatus for blending textile fibers
US4301573A (en) * 1979-06-18 1981-11-24 Gunter & Cooke, Inc. Fiber processing apparatus and method
DE2939890C3 (de) * 1979-10-02 1982-02-25 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Verfahren und Vorrichtung zum Öffnen und Mischen von Faserballen

Also Published As

Publication number Publication date
DE3170585D1 (en) 1985-06-27
US4399590A (en) 1983-08-23
ES504335A0 (es) 1983-01-01
IN154895B (fr) 1984-12-22
BR8104737A (pt) 1982-04-13
JPH0217644B2 (fr) 1990-04-23
EP0044408A1 (fr) 1982-01-27
JPS5751819A (en) 1982-03-26
ES8302130A1 (es) 1983-01-01
ATE13448T1 (de) 1985-06-15

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