EP0879905A1 - Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse - Google Patents

Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse Download PDF

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Publication number
EP0879905A1
EP0879905A1 EP98810265A EP98810265A EP0879905A1 EP 0879905 A1 EP0879905 A1 EP 0879905A1 EP 98810265 A EP98810265 A EP 98810265A EP 98810265 A EP98810265 A EP 98810265A EP 0879905 A1 EP0879905 A1 EP 0879905A1
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EP
European Patent Office
Prior art keywords
fiber material
continuous conveyor
sensor
foreign
conveyor
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.)
Ceased
Application number
EP98810265A
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German (de)
English (en)
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.)
Jossi Holding AG
Original Assignee
Jossi Holding 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 Jossi Holding AG filed Critical Jossi Holding AG
Publication of EP0879905A1 publication Critical patent/EP0879905A1/fr
Ceased legal-status Critical Current

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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
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/003—Detection and removal of impurities
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B3/00—Mechanical removal of impurities from animal fibres
    • D01B3/02—De-burring machines or apparatus
    • D01B3/025—Removing pieces of metal

Definitions

  • the invention relates to a method for recognizing and eliminating of foreign substances in fiber material according to the generic term of claim 1. Concerning the device the invention also a device according to The preamble of claim 9. Such methods and devices serve in particular in a blow room foreign substances such as. Cords, plastic tapes, wires, etc. the raw cotton delivered.
  • the DE-U-296 04 552 a device in which the fiber flakes in an air flow through a fiber transport line are transported through, with an optical sensor system and a separator of the fiber transport line assigned.
  • the fibers are in compresses a shaft into a nonwoven fabric, the Shaft through a conveyor belt at least on one side is formed.
  • the sensor field is in the area of this shaft Arranged and foreign substances are removed after leaving the Separated shaft from the nonwoven.
  • the Benefits of working in air flow can be exploited without the disadvantages of compressing the fibers into one To have to accept fiber fleece in the field of sensors.
  • the fiber material on the surface is particularly advantageous a rotating sieve drum and at least sucked in there by means of a vacuum.
  • a pneumatic delivery becomes the transport air largely removed.
  • a sieve drum as a continuous conveyor can be structurally easily arranged and in terms of their Control peripheral speed precisely.
  • the continuous conveyor can also be perforated Conveyor belt are formed that are over a certain Let the line put under negative pressure and that by two or more pulleys is deflected.
  • the fixation on the endless surface does not necessarily have to be due to negative pressure respectively. Mechanical fixation would also be conceivable Needles, slats, etc.
  • the fixation does not have to be mandatory either be such that the fibers or foreign substances cannot move are kept on the surface.
  • a special optimal transfer from a pneumatic Feed conveyor line to the surface of the screening drum arises when the fiber material tangent to the surface the sieve drum is brought up. In this way finds practically no brisk change in speed when Impact of the fiber material instead of the surface. It Of course, it would also be conceivable for the fiber material to be radial to hit the drum. Also an unpressurized one Scattering the fiber material would be conceivable, both on the surface of a screen drum, as well as on the surface a conveyor belt.
  • the conveying speed of the continuous conveying means is preferably about the same size as the conveying speed of the Fiber material in the pneumatic feed conveyor line. On this ensures that the fiber material is roughly in the same density is distributed on the continuous conveyor, how it is fed. This will also make it uncontrolled Turbulence largely avoided.
  • the fiber material can already be placed on the surface of the continuous conveying device is guided past the sensor field be, the sensor field for example on the pneumatic Feed conveyor line can be arranged.
  • the sensor field can be arranged very close to the continuous conveyor, so the fiber material immediately after the sensor field is captured by the continuous funding.
  • you can the sensor field but also directly on the surface of the Continuous funding may be arranged, the sensor arrangement attached inside or outside the endless surface can be.
  • the sensor arrangement can have sensors based on different physical principles work. Line scan cameras, electromagnetic, are conceivable Sensors, infrared sensors, X-rays, etc. Also one Combination of different sensor types in a row possible.
  • Foreign matter can be caused by applying pressure or Vacuum removed from the surface of the continuous conveyor will.
  • a sieve drum or with a perforated one Conveyor belt can have a pressure nozzle arrangement be arranged on the back of the surface, with the help of which a pressure surge through the surface and across Transport direction can be generated.
  • Alternatively or additionally can also have a brief vacuum above the surface generated to suck foreign matter.
  • club arms could be over be arranged on the surface of the continuous conveyor, which foreign substances knock off the surface and which can also be operated individually for selective excretion are.
  • the fiber material is preferred after the separation device by mechanical means, for example by at least one release roller, from the surface of the continuous conveyor decreased. That way, again a dissolution of the fiber material instead, so that it is in a pneumatic discharge conveyor line can be transported further can. But it would also be conceivable to replace the controlled and cleaned fiber material by means of overpressure or To cause negative pressure.
  • the procedure is special suitable that based on the width of the surface of the Continuous conveyance only selectively on the separation device Sections that are operated on the feed path of a previously determined foreign substance.
  • the high lateral stability the feed path allows it to be very targeted numerous relatively short sections.
  • FIG. 1 shows a condenser 7 at the input of the device, in which the fibers from the conveying air in a known manner be separated so that they are loosened up by one Opening roller 11 depressurized and in free fall in the direction of the arrow b through the feed conveyor line 4 to the surface of a perforated conveyor belt 8 fall.
  • the conveyor belt is around Deflection rollers 10, 10 'and 10' 'stretched and moves with constant speed in the direction of the arrow a.
  • a sensor arrangement 2 is arranged, which reacts to foreign material.
  • Sensor field 1 could also be arranged in the area of the feed conveyor line 4.
  • the sensor arrangement can have sensors which optical, acoustic, infrared, x-ray or other physical Process sizes.
  • the separation device 3 Immediately after the section kept under vacuum the conveyor belt, the separation device 3 is arranged. It essentially has a pressure nozzle arrangement 6 the surface of the conveyor belt 8. With their help a pressure surge is generated through the conveyor belt, so that foreign material in the adjacent foreign material container 12 is thrown.
  • a pair of removal rollers 13 is arranged, which the fiber material in the direction of arrow b in a Discharge conveyor line 5 feeds. In the discharge conveyor line the fiber material is suctioned off.
  • the fiber material is fed under pressure on the right Angle on the surface of the conveyor belt in a pneumatic Feed conveyor line 4 in the direction of the arrow b.
  • a pneumatic Feed conveyor line 4 in the direction of the arrow b.
  • the surface of the conveyor belt becomes the fibers from the conveying air separated, similar to a condenser.
  • Through the Perforation of the conveyor belt flows the air in the direction of the arrow c further through an intermediate connector 15 between the two Runs of the conveyor belt into a pneumatic discharge conveyor line 5.
  • the fiber material is between the lamellae of the Conveyor belt held and transported.
  • a formwork 16 forms a conveyor channel together with the conveyor belt.
  • the sensor field 1 is covered by a section of the pneumatic feed conveyor line 4 formed. This section consists of transparent side walls, the Sensor arrangement 2 is formed by line cameras, which apply the sensor field on both sides.
  • the separation device 3 is behind the run of the conveyor belt arranged. It also consists of a pressure nozzle arrangement 6, with the help of foreign material through a Opening 17 in the casing 16 into a foreign material container 12 can be ejected.
  • Pressure nozzle arrangement is the fiber material over the Opening 17 pushed away and arrives at the entrance of the discharge conveyor line 5 again under the influence of the conveying air for further transport.
  • FIG. 3 there is continuous funding from a rotating drum 19, which on not shown here in the direction of the arrow a is rotatably mounted.
  • the feeding of the fiber material takes place in the direction of arrow b in a pneumatic feed conveyor line 4, the tangential to the surface of the screening drum 19 is introduced.
  • a drum casing 28 forms thereby a curved channel through which part of the conveying air flows in the direction of arrow c.
  • the sensor field 1 is arranged directly in front of the drum.
  • the sensor arrangement 2 is equipped with line cameras whose optical axes via deflection mirror 18 onto the sensor field 1 are directed.
  • Alternative sensor arrangements would also be here conceivable, e.g. Infrared sensors.
  • a vacuum sector 20th delimited which extends over approx. 180 °.
  • This vacuum sector is by means not shown here a lateral pipe connection permanently with a vacuum pressurized so that most of the conveying air passes through the openings of the sieve drum penetrates.
  • the sieve drum itself can be built up in two layers, for example.
  • An inner, mechanically stable layer is rectangular Provide openings in a regular arrangement.
  • As the outside Layer can be covered with a fine mesh be provided.
  • the separation device 3 is on the drum surface arranged. It has a pressure nozzle arrangement 6 inside the inner chamber 27. On the same level as the pressure nozzle arrangement a connecting channel 23 is arranged to a foreign material chamber 24 leads. The connection channel 23 is closed in the idle state with a flap 21 which a flap actuator 22 can be activated. At the same time with the pressure nozzle arrangement 6 also the flap drive 22 activated so that foreign material is combined via the pressure surge with a suction in reaches the connecting channel 23.
  • the foreign material chamber 24 is operated via a suction fan 26 permanently pressurized.
  • the suction fan sucks air through a filter 25. Once the flap 21 is opened, the foreign material is also subject to Suction of the fan 26. Safe storage in the Foreign material chamber 24 is thereby ensured. That from Foreign material freed fiber material is after the separation device 3 on the removal roller pair 13 from the drum detached and in a loose form in the pneumatic discharge conveyor line 5 delivered in the direction of arrow b.
  • the peripheral speed of the screening drum is the conveying speed adapted and can in the feed conveyor line up to 15 m / s. With a drum diameter of 750 mm this results in a speed of approx. 400 U / m.
  • the order of the sensor field 1 relative to the separation device 3, that is the actual reaction distance depends primarily on the reaction time the separating device and the conveying speed from. For example, the response time is 0.1 s and the conveying speed 10 m / s, the reaction path must taking into account a safety factor 1.3 1.3 m.
  • the dimensioning of the sieve drum, their diameter in particular is therefore largely also depends on this reaction time.
  • the exemplary embodiment according to FIG. 4 differs from that according to FIG. 3 only in that the sensor field 1 is arranged in the region of the surface of the screen drum 19 where the fiber material is on the sieve drum is filed.
  • the sensor arrangement 2 can be sensors have inside and / or outside the drum are arranged.
  • the excreted at the separation device 3 Foreign material is placed in an open foreign material container 12 ejected.
  • the width of the continuous conveyor is adapted to the specific circumstances.
  • the cross section of the supply or discharge conveyor lines is preferably rectangular.
  • the sensor arrangements can also across the entire width of the continuous conveyor have several separate individual sensors.
  • the Elimination device several arranged side by side Have pressure nozzles, each of which is selective from the individual sensors are controllable. This way you can refer to the width of the fiber material flow selectively excreted foreign material will.
  • the physical functioning of the sensors and the necessary control means are known to the person skilled in the art known.
  • the principle of selective excretion is, for example shown in a highly schematic manner in FIG.
  • a sensor arrangement 2 which consists of several Individual sensors 29a to 29d exist.
  • the separation device 3 in turn consists of several slit-like individual nozzles 30a to 30d, which are inside the sieve drum on a parallel line to the axis of rotation. Every single sensor a single nozzle is assigned to each.
  • a foreign body 31 passes, for example, the individual sensor 29c, which is connected to the Single nozzle 30c transmits a control signal, which in the correct Time is activated and the foreign body through eliminates a pressure surge.
  • the remaining individual nozzles 30a, 30b and 30d remain inactive, so that obviously only a very small subset of uncontaminated fiber material is eliminated.
  • the individual sensors or individual nozzles can also be grouped together.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
EP98810265A 1997-05-20 1998-03-25 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse Ceased EP0879905A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH116797 1997-05-20
CH1167/97 1997-05-20

Publications (1)

Publication Number Publication Date
EP0879905A1 true EP0879905A1 (fr) 1998-11-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810265A Ceased EP0879905A1 (fr) 1997-05-20 1998-03-25 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse

Country Status (1)

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EP (1) EP0879905A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967305A1 (fr) * 1998-06-25 1999-12-29 Jossi Holding AG Procédé et appareil pour enlever les corps étrangers d'une matière fibreuse, en particulier du coton
EP0989214A1 (fr) * 1998-09-07 2000-03-29 Jossi Holding AG Procédé et appareil pour éliminer les corps étrangers de la matière fibreuse, en particulier du coton brut
WO2001044545A1 (fr) * 1999-12-16 2001-06-21 Zellweger Luwa Ag Procede et dispositif pour reconnaitre et evacuer une matiere etrangere presente dans un flux de fibres constitue de fibres textiles comprimees
BE1015004A3 (de) * 2000-11-11 2004-08-03 Hergeth Hubert A Luftausschleuseverfahren fur fremdteile.
WO2006079426A1 (fr) * 2005-01-25 2006-08-03 Jossi Holding Ag Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut
CH718505A1 (de) * 2021-04-01 2022-10-14 Rieter Ag Maschf Verfahren und Vorrichtung zur Analyse von Komponenten einer Fasermasse.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9017759U1 (de) * 1990-09-17 1992-01-16 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum Abscheiden metallischer Verunreinigungen aus einer Fasertransportstrecke in der Spinnereivorbereitung
DE4415907A1 (de) * 1994-05-06 1995-11-09 Hergeth Hubert A Hintergrund beim Erkennen von Fremdteilen in Faserströmen
DE19516569A1 (de) * 1995-05-05 1996-11-07 Truetzschler Gmbh & Co Kg Vorrichtung zum Abscheiden von Fremdstoffen, z. B. metallischer Verunreinigungen, aus einer Fasertransportstrecke in der Spinnereivorbereitung
WO1996035831A1 (fr) * 1995-05-12 1996-11-14 Jossi Ag Procede et dispositif permettant d'identifier et de separer des corps etrangers contenus dans un materiau fibreux
EP0780499A2 (fr) * 1995-12-20 1997-06-25 Hubert A. Dipl.-Ing. Dipl.-Wirtsch.-Ing. Hergeth Cylindre à secteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9017759U1 (de) * 1990-09-17 1992-01-16 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum Abscheiden metallischer Verunreinigungen aus einer Fasertransportstrecke in der Spinnereivorbereitung
DE4415907A1 (de) * 1994-05-06 1995-11-09 Hergeth Hubert A Hintergrund beim Erkennen von Fremdteilen in Faserströmen
DE19516569A1 (de) * 1995-05-05 1996-11-07 Truetzschler Gmbh & Co Kg Vorrichtung zum Abscheiden von Fremdstoffen, z. B. metallischer Verunreinigungen, aus einer Fasertransportstrecke in der Spinnereivorbereitung
WO1996035831A1 (fr) * 1995-05-12 1996-11-14 Jossi Ag Procede et dispositif permettant d'identifier et de separer des corps etrangers contenus dans un materiau fibreux
EP0780499A2 (fr) * 1995-12-20 1997-06-25 Hubert A. Dipl.-Ing. Dipl.-Wirtsch.-Ing. Hergeth Cylindre à secteur

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967305A1 (fr) * 1998-06-25 1999-12-29 Jossi Holding AG Procédé et appareil pour enlever les corps étrangers d'une matière fibreuse, en particulier du coton
EP0989214A1 (fr) * 1998-09-07 2000-03-29 Jossi Holding AG Procédé et appareil pour éliminer les corps étrangers de la matière fibreuse, en particulier du coton brut
WO2001044545A1 (fr) * 1999-12-16 2001-06-21 Zellweger Luwa Ag Procede et dispositif pour reconnaitre et evacuer une matiere etrangere presente dans un flux de fibres constitue de fibres textiles comprimees
JP2003517108A (ja) * 1999-12-16 2003-05-20 ツエルヴエーゲル・ルーヴア・アクチエンゲゼルシヤフト 圧縮された紡織繊維から成る繊維流中の異材料を識別して排出する方法及び装置
US6848149B1 (en) 1999-12-16 2005-02-01 Uster Technologies Ag Method and device for identifying and expelling foreign material in a stream of fibers consisting of compressed textile fibers
BE1015004A3 (de) * 2000-11-11 2004-08-03 Hergeth Hubert A Luftausschleuseverfahren fur fremdteile.
WO2006079426A1 (fr) * 2005-01-25 2006-08-03 Jossi Holding Ag Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut
CN101076625B (zh) * 2005-01-25 2011-06-29 乔希控股股份公司 分离在纤维材料特别是原棉中的杂质的方法和设备
CH718505A1 (de) * 2021-04-01 2022-10-14 Rieter Ag Maschf Verfahren und Vorrichtung zur Analyse von Komponenten einer Fasermasse.

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