EP0093235B1 - Procédé pour ouvrir des balles de fibres - Google Patents

Procédé pour ouvrir des balles de fibres Download PDF

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Publication number
EP0093235B1
EP0093235B1 EP83101465A EP83101465A EP0093235B1 EP 0093235 B1 EP0093235 B1 EP 0093235B1 EP 83101465 A EP83101465 A EP 83101465A EP 83101465 A EP83101465 A EP 83101465A EP 0093235 B1 EP0093235 B1 EP 0093235B1
Authority
EP
European Patent Office
Prior art keywords
signal
bales
per unit
fed
removal
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
EP83101465A
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German (de)
English (en)
Other versions
EP0093235A1 (fr
Inventor
Marcel Zünd
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
Original Assignee
Maschinenfabrik Rieter AG
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Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0093235A1 publication Critical patent/EP0093235A1/fr
Application granted granted Critical
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Expired legal-status Critical Current

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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
    • D01G13/00—Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres
    • 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

Definitions

  • the present invention relates to a method for removing fiber bales parked on a stand in the spinning mill, in which a removal member is moved back and forth over the bales and lowered before each pass, and the removed flakes are poured into a storage device and from there to the storage device are transported to the next processing stage, the weight of the amount of flakes transported into the storage unit per unit of time being somewhat greater than the amount of flakes transported out of the storage unit per unit of time, and when a maximum filling state of the storage unit is reached, a stop signal which stops the removal process and a minimum filling level of the A start signal which sets the removal process into operation is delivered.
  • the removal member In devices known in practice for the removal of fiber flakes from fiber bales placed on a standing surface, the removal member is repeatedly guided over a series of bales, the fiber material detected by the removal member being continuously removed as fiber flakes and, for example, through a suction channel.
  • the removal device moves across the bales at a constant speed and its height is adjusted by a constant amount after each pass. As a result, a layer of flake material corresponding to this height adjustment is removed from the bales with each pass.
  • the captured flake material is transported to a store and from there to the subsequent processing machines such as cards, stretchers and combing machines. It is desirable that these subsequent processing machines be continuously supplied with material. Therefore, flake material must always be present in the storage.
  • the removal process is stopped when the filling level of the storage exceeds a maximum value. If the filling level in the memory then drops below a minimum value as a result of the constant flake removal for the subsequent processing machines, the ablation process is switched on again. This results in periodic shutdown and commissioning of the removal process, i.e. of flake production.
  • An optimal mode of operation is one in which the removal process works approximately 80-90% of the time and stands still approximately 20-10% of the time.
  • the bales to be removed are not equally dense across the board. They are the densest in their central area. This means that when the top and bottom parts of a bale are removed, less flakes are delivered in terms of weight than when the middle part is removed. With regard to the statements made above, this means that at the beginning and at the end of the bale less material is fed to the storage unit per unit of time in weight than when the bale is removed in the central region. Thus, the removal machine works at the beginning and end of the bale for longer periods of time than when removing the central area of the bale.
  • the optimal standstill value of 10-20% of the operating time is provided at the beginning and end of the bale.
  • the downtimes of the removal roller when removing the central area of the bale become too long. This is uneconomical because it means that the blowroom machines are underused.
  • start and stop signals are fed to a switching arrangement which generates a monitoring signal which is dependent on the duration of the time intervals given by the start and stop signals and is fed to a computer together with a predetermined signal defining a predetermined time interval which forms a control signal which is dependent on the monitoring signal and the desired signal and which is fed to control the weight of the flakes removed from the fiber bale by the removal member per unit of time to a device controlling the removal process of the removal member.
  • the removal of the dense part of the bale, which forms the majority of the flake material of the bale takes place in relatively thin layers. This means a more gentle bale opening with smaller flakes. The influence of the inhomogeneity of the bales is practically eliminated.
  • the ongoing adaptation to the optimal downtimes in comparison to the known removal machines and with a flake quality which is the same as that achieved with these known machines can be used to increase the overall production of the removal machine.
  • Fig. 1 shows a series of bales 11, which are parked on a stand. Above these bales, a removal member 12 is arranged, which is carried by a carrier 13. A motor is provided in the carrier 13, by means of which the removal member 12 can be set in rotation. The carrier 13 is movable back and forth along rails 14. The removal member 12 is also adjustable in height. A conveying channel 15 serves to receive the flakes removed from the bales 11 by the removal roller 12 and to feed them to a storage unit 16. From the storage unit 16, the fiber flakes pass through a duct 17 to subsequent processing machines.
  • a monitoring system 21 is located on the memory 16, which delivers a start signal a when a predetermined, minimum filling state of the memory 16 is reached and a stop signal e when a predetermined, maximum filling state of the memory 16 is reached.
  • the signals a and e pass through an electrical line 22 to an electrical circuit 23, in which a monitoring signal y is generated, which leads to the carrier 13 via a line 24.
  • the signal y is dependent on the time intervals present between the immediately successive start and stop signals a and e. 25 with a device is designated, which is used to deliver the longer cable length of the cable forming the line 24 required when the carrier 13 moves to the left, and which receives the cable which is released again when the carrier 13 moves to the right.
  • the drawing shows the reference symbols for the signals on the lines through which they are transmitted.
  • bales 18 are brought up and put down during the removal of the bales 11.
  • the removal member 12 is pivoted through 180 ° about the axis of rotation 33, whereupon the removal of the row of bales 18 is started. After these have been removed, the removal member is pivoted back onto a new row of bales 11 and these are removed, etc.
  • the circuit 23 shown in FIG. 1 comprises a switching arrangement 26 shown in FIG. 2, a line 27 and a computer 28.
  • the memory 16 with the monitoring system 21, the channels 15 and 17 and the lines 22 and 24 are again shown .
  • Flake material 32 is shown with oblique hatching.
  • the removal machine 30 is represented as a unit schematically by a block.
  • a nominal signal j is fed to the computer 28 through a line 31.
  • the computer 28 forms a control signal s from the target signal j and the monitoring signal y supplied by the switching arrangement 26, which control signal s is fed via line 24 to a device (not shown) which controls the removal process of the removal member 12 and is present in the removal machine 30 or in the carrier 13 becomes.
  • the start and stop signals a and e are fed directly from the monitoring system 21 to the removal machine 30 via the lines 22, 27 and 24.
  • the carrier 13 moves back and forth with the removal member 12 on the rails 14.
  • the flake material is removed from the bales 11 by the rotating removal member 12.
  • This flock material 32 passes through the conveying channel 15 into the storage device 16.
  • the amount of flake material 32 entering the storage 16 through the conveying channel 15 per unit time is somewhat larger than the amount of flake material 32 removed through the passage 17 per unit time.
  • a working time interval T a and a downtime time interval T s connected to this are referred to as an operating cycle.
  • a monitoring signal y is formed in the switching arrangement 26, which is dependent on the time intervals T a and T s , ie is a function of the variables T a and T s .
  • the target signal j defines a predetermined, desired relationship of the values T a and T s to one another.
  • T a and T s have to satisfy the relationship mentioned at the beginning, according to which in an operating cycle (of the duration (T a + T s )) the working time interval T a is four times the idle time interval T s (ie T a forms 80% and T s forms 20% of the duration of an operating cycle), the target signal j has a certain value.
  • the signal y changes.
  • the monitoring signal y and the desired signal j are compared with one another and a control signal s is generated which is a function of the deviation of the values T a and T s from their desired mutual relationship, which is predetermined by the signal j.
  • This signal s controls the device provided in the removal machine 30 and controls the removal process of the removal member 12 in such a way that the flake production, ie the weight of the flakes removed by the removal member 12 per unit of time from the fiber bales 11 is changed in the sense that the desired relationship between T. and T s given by the target signal j is obtained.
  • the control signal s effects at the transition of the removal from the upper to the middle region of the bale 11, for example by reducing the height adjustment of the removal member 12 per pass, i.e. per operating cycle, a reduction in weight of the flake material captured by the roller 12 per unit of time.
  • the control signal s at the transition of the removal from the middle to the lower region of the bales 11, for example by increasing the height adjustment of the removal member 12 per pass causes an increase in the weight of the flake material recorded by the roller 12 per unit of time.
  • Such a weight reduction or enlargement of the amount of flake material removed per unit of time is achieved not only by the reductions or enlargements of the reduction mentioned just before the passages of the removal member 12.
  • the time intervals of the successive passages of the removal member 12 can also be reduced or enlarged.
  • the weight of the flakes removed from the fiber bales 11 by the removal member 12 per unit of time is changed. If this weight is increased, the memory 16 is filled more quickly, so that the number of downtime intervals T s increases. If this weight is reduced, the number of these intervals T s is reduced.
  • a monitoring signal y is formed in the switching arrangement 26, which is proportional to the expression T a / (T a + T s ).
  • T a / (T a + T s ) has the value 0 , 8 owns.
  • a control signal is formed in the computer 28 from the target signal j and the monitoring signal y, by means of which the removal machine 30 is adjusted to the mentioned value 0.8 by changing the amount of flakes removed per unit of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (6)

1. Procédé pour décortiquer des balles de fibres, disposées sur une surface de stationnement dans la filature, procédé dans lequel un organe de décorticage se meut en va-et-vient au-dessus des balles et qui est abaissé à chaque passage, et les flocons ainsi détachés remplissent un réservoir, depuis lequel ils sont dirigés vers leurs étapes de travail ultérieures, procédé dans lequel, en ce qui concerne le poids, la quantité de flocons dirigée dans le réservoir est un peu plus importante que la quantité de flocons qui est dirigée en dehors du réservoir par unité de temps, et procédé dans lequel, lorsque le niveau de remplissage maximum du réservoir est atteint, un des processus de décorticage est mis à l'arrêt par un signal d'arrêt (e) et, lorsque le niveau de remplissage minimum du réservoir est atteint, un signal de mise en route (a) est donné pour mettre en route un des processus de décorticage, caractérisé par le fait que les signaux de mise en route (a) et de mise à l'arrêt (e) sont dirigés vers un arrangement de commutation (26), qui produit un signal de surveillance (y), lequel est dépendant de la durée des intervalles de temps (Ta, Ts) qui sont donnés par les signaux de mise en marche (a) et de mise à l'arrêt (e), et, conjointement avec un signal de consigne (j) qui définit des intervalles de temps donnés, est dirigé vers un calculateur (28), dans lequel un signal de commande (s) est formé, dépendant du signal de surveillance (y) et du signal de valeur de consigne (j), lequel est dirigé vers un dispositif qui commande le processus de décorticage d'un organe de décorticage (12) pour commander le poids des flocons arrachés aux balles de fibres par l'organe de décorticage (12) par unité de temps.
2. Procédé selon la revendication 1, caractérisé par le fait que le signal de surveillance (y) est proportionnel à l'expression Ta/(Ta+Ts), dans laquelle Ts représente les intervalles de temps d'arrêt, lesquels sont situés entre les signaux d'arrêt (e) et le signal de mise en marche (a) qui suit immédiatement chaque signal de mise à l'arrêt (e), et T,, représente les intervalles de temps de travail, lesquels sont situés entre les signaux de mise en marche (a) et le signal de mise à l'arrêt (e) qui suit immédiatement chaque signal de mise en marche (a).
3. Procédé selon la revendication 2, caractérisé par lefaitque la valeur du signal de consigne (j) est choisie de telle sorte que l'expression Ta/(Ta+Ts) représente à peu près la valeur de 0,8.
4. Procédé selon la revendication 1, caractérisé par le fait que, pour commander le poids de la quantité de flocons livrée par l'organe de décorticage (12) par unité de temps, les déplacements en hauteur de l'organe de décorticage (12) sont variés dans leurs grandeurs par le signal de commande (s) qui se fait à chaque passage successif.
5. Procédé selon la revendication 1, caractérisé par le fait que, pour commander le poids de la quantité de flcons livrée par l'organe de décorticage (12) par unité de temps, les intervalles de temps des passages de l'organe de décorticage (12) au-dessus des balles (11 ) peuvent être variés par le signal de commande (s).
6. Procédé selon la revendication 5, caractérisé par le fait que la variation des intervalles de temps des passages de l'organe de décorticage (12) est réalisée par un changement de la vitesse de déplacement du porteur (13).
EP83101465A 1982-05-04 1983-02-16 Procédé pour ouvrir des balles de fibres Expired EP0093235B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2719/82 1982-05-04
CH271982 1982-05-04

Publications (2)

Publication Number Publication Date
EP0093235A1 EP0093235A1 (fr) 1983-11-09
EP0093235B1 true EP0093235B1 (fr) 1985-07-03

Family

ID=4240059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101465A Expired EP0093235B1 (fr) 1982-05-04 1983-02-16 Procédé pour ouvrir des balles de fibres

Country Status (4)

Country Link
US (1) US4566152A (fr)
EP (1) EP0093235B1 (fr)
JP (1) JPS58191225A (fr)
DE (1) DE3360334D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513295C2 (de) * 1985-04-13 1998-05-14 Truetzschler Gmbh & Co Kg Vorrichtung zum Abtragen von Faserballen
GB8520130D0 (en) * 1985-08-10 1985-09-18 Haigh Chadwick Ltd Control apparatus
GB8524304D0 (en) * 1985-10-02 1985-11-06 Rieter Ag Maschf Flock delivery systems
ES2028968T3 (es) * 1987-10-07 1992-07-16 Maschinenfabrik Rieter Ag Sistema de gobierno de la produccion.
EP0386580A1 (fr) * 1989-03-07 1990-09-12 Maschinenfabrik Rieter Ag Procédé et installation pour prélever des paquets de fibres à partir de balles
EP0548023A1 (fr) * 1991-12-17 1993-06-23 Maschinenfabrik Rieter Ag Commande de débit d'une ligne de nettoyage
ITMI20040412A1 (it) * 2004-03-04 2004-06-04 Marzoli Spa Dispositivo e procedimento per il prelievo automatico di fibre da balle di fibre

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176995A (en) * 1972-10-05 1979-12-04 Fiber Controls Corporation Automatic pickup and unloading crane
US3951282A (en) * 1973-10-24 1976-04-20 Alex Jacques Keller Method for feeding fibers
DE2626648C2 (de) * 1976-06-15 1978-07-27 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Vorrichtung zum Öffnen und Mischen von Faserballen
US4087882A (en) * 1977-01-12 1978-05-09 Automatic Material Handling, Inc. Apparatus for plucking and delivering fiber to a feeder with automatic dust control
DE2832085C3 (de) * 1978-07-21 1981-08-13 Trützschler GmbH & Co KG, 4050 Mönchengladbach Verfahren und Vorrichtung zum Zusammenstellen von Fasermischungen
US4363585A (en) * 1979-09-25 1982-12-14 Automatic Material Handling, Inc. Bale level control system for mechanical hopper feeder
DE2939890C3 (de) * 1979-10-02 1982-02-25 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Verfahren und Vorrichtung zum Öffnen und Mischen von Faserballen
DE3170585D1 (en) * 1980-07-23 1985-06-27 Rieter Ag Maschf Method and apparatus to control a blending installation for textile fibres

Also Published As

Publication number Publication date
DE3360334D1 (en) 1985-08-08
JPS58191225A (ja) 1983-11-08
US4566152A (en) 1986-01-28
EP0093235A1 (fr) 1983-11-09
JPH0321649B2 (fr) 1991-03-25

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