EP1234901A1 - Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut - Google Patents

Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut Download PDF

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Publication number
EP1234901A1
EP1234901A1 EP01104274A EP01104274A EP1234901A1 EP 1234901 A1 EP1234901 A1 EP 1234901A1 EP 01104274 A EP01104274 A EP 01104274A EP 01104274 A EP01104274 A EP 01104274A EP 1234901 A1 EP1234901 A1 EP 1234901A1
Authority
EP
European Patent Office
Prior art keywords
separating device
fiber material
separating
sensor arrangement
active medium
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.)
Withdrawn
Application number
EP01104274A
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German (de)
English (en)
Inventor
Andreas Meyenhofer
Walter Kiechl
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
Jossi Holding AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG, Jossi Holding AG filed Critical Maschinenfabrik Rieter AG
Priority to EP01104274A priority Critical patent/EP1234901A1/fr
Priority to PCT/EP2002/001629 priority patent/WO2002068740A1/fr
Publication of EP1234901A1 publication Critical patent/EP1234901A1/fr
Withdrawn legal-status Critical Current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
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/003—Detection and removal of impurities

Definitions

  • the invention relates to a method and an apparatus for Detection and removal of foreign substances in fiber material, ins particular in raw cotton according to the preamble of claims 1 and 9. Especially in the textile industry, it is before spinning the fibers to yarn essential that foreign matter is removed to avoid disrupting the processing.
  • the term foreign material includes in particular fabrics, Cords, foils and fibers that are not specified in the yarn Belong to fiber material (e.g. polypropylene fibers in the Material for the production of cotton fibers understood.
  • such substances are also to be understood as which is ordinary in connection with vegetable fiber Plant belong, but which in the subsequent processing the fibers are undesirable, e.g. Trash parts, nits, Seeds etc.
  • WO 89/01832 proposes the sensor arrangement and the separating device directly on a pneumatic fiber transport line to arrange, whereby foreign substances by a Compressed air pulse directly into an essentially gas-tight chamber are eliminated, which with the fiber transport line over a discharge opening is connected.
  • detection and elimination take place of foreign substances not directly on a fiber transport line, but at an unpressurized transport section where the fibers be compacted in a shaft.
  • the shaft will be there formed by a transparent pane on one side and through a conveyor belt on the other side.
  • At the end of Several air nozzles are arranged across the width, with which foreign substances are discharged into a container become. Then the fiber material becomes a suction chute fed.
  • DE 196 27 194 discloses a card with one Device for separating foreign fibers, whereby impurities after removal of the nonwoven from the customer and before merging into a sliver from the fleece with Be ripped out with the help of an air stream. This will be on one or more nozzles. With this procedure nits can also be excreted.
  • the fiber material is already a compact nonwoven from the Actuated sensor arrangement and on the separation device is led past, the foreign material can its relative position between sensor arrangement and separation device practical no longer change what is evident the mode of action the output improved.
  • the inventive method or the device use a loose fiber stream with a high degree of resolution.
  • the nonwoven at least in the area of the separating device is freely stretched, it can be particularly well with the act on the jet-like active medium.
  • Such a free one The route is not absolutely necessary. For example, it is conceivable also a tangential action while the nonwoven around the surface of a drum.
  • a particularly efficient adjustment of the excretion pulse the foreign substance to be excreted can be reached if at the sensor arrangement a signal depending on the size and / or mass of the foreign substance is generated and if duration and / or the intensity of the pulse as a function of this signal is controlled.
  • a signal depending on the size and / or mass of the foreign substance is generated and if duration and / or the intensity of the pulse as a function of this signal is controlled.
  • a small and relatively light plastic part only a short impulse of low intensity, while a flat and heavier leather piece a longer due to its size and mass and more intense impulse is needed.
  • the active medium is ejected from at least one nozzle and bundled into a beam with a predetermined cross-section.
  • the radiation shape can be used be optimized. For example, it can be flat Generate jets that practically form a liquid curtain.
  • Other cross-sectional geometries such as e.g. curved or wedge-shaped cross-sections.
  • At least one nozzle depending on the relative position the foreign matter is positioned in the feed path the arrangement and control of a plurality of over the full width of the feed path distributed nozzles.
  • a single one Nozzle or a group of nozzles could use suitable drives such as B. linear motors or pressure cylinders become.
  • a rotatable bearing would also be conceivable at a suitable location next to the feed path so that the nozzle or the nozzle group, depending on the angle of rotation, the entire Can sweep the width of the feed path.
  • the active medium is preferably a liquid, in particular Water that is available in every company and that regarding Environmental pollution and the like is harmless. Instead of of water, however, could easily be other liquids are used, e.g. B. those with a large amount of water softening viscosity. When choosing the appropriate liquid could also be the degree of wetting on the fiber material or the Volatility play a role. So an easily volatile one Liquid, for example, has the advantage of being excreted or fibers that are not excreted relatively quickly after wetting dry again.
  • the active medium could also contain solids, in particular free-flowing bulk goods such as B. a Granules or a powder.
  • the method according to the invention or the device used on a card the detection and excretion of foreign substances on the drum roll or between the drum roll and the pitcher stick.
  • the proportionate thin fleece that the carding machine produces recognize foreign matter optimally and is an excretion associated with extremely low fiber loss. Because of the targeted Influence of the impulse will not make whole holes torn out of the fleece. Rather, it depends on the beam an almost precise cutting out of the foreign matter possible, which is why nits are removed particularly advantageously in this way can be.
  • the treatment according to the invention can be carried out on a Processing line z. B. in the blowroom or in the carding machine a short staple spinning mill can be used several times z. B. immediately after opening the cotton bales on the free Flock stream, on a downstream treatment machine such as e.g. on a fine cleaner on the pressurelessly conveyed fiber stream and finally as described above on the card.
  • a downstream treatment machine such as e.g. on a fine cleaner on the pressurelessly conveyed fiber stream and finally as described above on the card.
  • the inventive method and the device do not limited the treatment of cotton fibers. Also other animal and vegetable fiber material such. B. sheep's wool, Hemp but also tobacco leaves etc. can be made in the same way be treated.
  • FIG. 1 shows a separating unit, generally designated 9, which is integrated directly into a fiber transport line 10 is.
  • the fiber transport line has in the area of the separation unit an approximately rectangular cross section and they pneumatically transport along fiber material 2 in flake form a vertical feed path 4 in the direction of arrow a.
  • the fiber material is first from one Sensor arrangement 5, 5 'reacting to foreign substances.
  • This consists, for example, of two line-scan CCD cameras
  • Both sides of the feed path 4 are arranged, with an illustration of the fiber material flowing past via deflecting mirrors 11, 11 'is reflected on the sensors.
  • the transport line is provided with transparent wall sections 12 for this purpose.
  • the flake current is generated by lighting fixtures, not shown also illuminated in incident light and transmitted light.
  • a downstream separating device 6 via a not shown control device activated, the response time and the conveying speed is taken into account.
  • the separation device has one or more nozzles that come with a liquid tank 17 are connected, which acts as a hydraulic accumulator is trained.
  • a liquid active medium 7 is stored therein, the gas filling by means of a pump 18 under a certain working pressure is maintained.
  • a gas would also be loaded with a spring Membrane conceivable.
  • the technology of such hydraulic accumulators is generally known to the person skilled in the art.
  • the valve 16 is opened as long as the Pulse should last. In certain cases, the excretion pulse could also take place directly via the pump 18, the Pump takes over the function of valve 16.
  • the liquid flow acts on the contaminated portion of the fiber material or the foreign substance 1 and thus causes a Distraction through an opening 13 in the transport channel leading to a Foreign matter container 15 leads.
  • a baffle 14 causes a deflection downward.
  • the detection takes place and removal of foreign substances directly on a fiber treatment machine, namely on a fine cleaner 19.
  • the fiber material in the form of a loose stream of flakes pneumatically in the direction of arrow a via a fiber transport line 10 fed to the machine.
  • On a condenser with a sieve drum 20 is first the transport air from the Separated fiber material.
  • a release roller 21 ensures that the fiber material is fed to a feed shaft 22 without pressure becomes. This is on one side by a conveyor belt 23 and on the other hand again through a transparent section 12 formed.
  • the conveyor belt compresses the loose Fiber material to form a nonwoven fabric 3.
  • the nonwoven is unilaterally from acted upon the sensor assembly 5, of course again the necessary lighting fixtures are available.
  • the nonwoven fabric 3 is then fed over a pair of feed rollers 24 a cleaning roller 25 which feeds the fiber material tears over a grate 43, natural impurities such as z. B. sand, plant seeds, etc. are stripped. With help The fiber material cleaned in this way becomes a supply air line 26 again pneumatically conveyed further in the fiber transport line 10.
  • the separation principle according to the invention is on a card 27 realized. This assures on known Way out of the drum 28 with the lid 29.
  • the loose and parallel fibers become slower current customer 30 taken over and thereby to a fleece summarized.
  • This nonwoven fabric 3 can now already on the Surface of the pickup 30 is acted upon by a sensor arrangement 5 become.
  • a scraper roller 31 guides the nonwoven fabric then a pair of squeeze rollers 32.
  • the nonwoven fabric is between the pair of nip rollers 32 and one Discharge roller pair 33 freely tensioned and can thus over the separation device 6 can be acted upon with a shedding impulse.
  • Foreign substances are ejected vertically downwards and from the Foreign matter container 15 added. There may be a removal via a wash line 44.
  • the separating device is functionally constructed the same as in the previous exemplary embodiments.
  • the nonwoven fabric is then closed on a pile funnel 34 a sliver 45 and then combined on the can 35 in a can 36 stored.
  • the doctor roller 31 leads the fiber fleece from the customer 30 directly onto a fleece bridge 38, which is provided with an opening 39. Is over the opening Sensor arrangement 5 arranged.
  • the fleece 3 is by means of a Lamp 40 is illuminated by transmitted light through opening 39.
  • a Intermediate roller 37 ensures that the fleece lies flat on the Fleece bridge is held down and transported on.
  • the separating device 6 is arranged over a section, on which the fleece between the fleece bridge 38 and a pair of draw-off rollers 33 is freely tensioned. Foreign substances 1 are down ejected into a floating channel 41.
  • an arrangement of the separation device 6 below the fleece and a beam guidance from bottom to top could additionally have a suction device over the fleece be arranged.
  • the fleece speed on the fleece bridge can be approx. 5m / s. With a total reaction time of the separation device of about 10 ms results in a necessary distance between sensor arrangement and separation device of at least 50 mm.
  • FIG. 5 is shown schematically how over the entire Width B of a feed path 4 distributes several individual nozzles 8 to 8n can be arranged.
  • the sensor arrangement 5 can Locate foreign matter 1 with respect to its relative position across width B, be it via individual sensors or via a discrete, full-width imaging sensor that locates the location. There is therefore a foreign substance in the sensor sections 5 'and 5' 'are then only those on this Feed line lying nozzles 8 'and 8' 'activated.
  • the nozzles 8 can depend on their configuration based on the feed direction a also be staggered one behind the other in such a way that the individual active agent jets move laterally overlap.
  • FIG. 6 shows a nozzle 8 with a rectangular one Mouth 46, which the active medium to a correspondingly flat Beam 42 bundles.
  • Figure 7 there is, for example, a separation device shown, in which the active medium 7 is a free-flowing granulate or the like.
  • the function of the device is comparable to that of an air rifle.
  • the Active medium 7 is stored in a container 49. Over a rotatable screw 50 may contain a certain subset of the granules be introduced into a barrel 51.
  • the discharge takes place via a pressure surge from a pressure tank 47 via a valve 48 this emission also causes a gas pressure wave at the mouth, but the scattering of the granules is only a short distance low.
  • solutions are also possible for solid active media bar at which the output without gas pressure by mechanical acceleration via a firing pin or the like.
  • the separating device 6 is displaceable in the direction of the arrow X. stored above the feed path 4.
  • one Rail 52 provided on which the separation device with a carriage not shown here and by means of a Drive motor 53 is displaceable.
  • the nozzle 8 has a linear one Extension that extends in the conveying direction a.
  • the separation device 6, which is controlled by the computer, travels first the position for the foreign matter 1 'that their Starting position is closest. After excreting this Foreign matter immediately becomes the next position to remove the Foreign matter 1 '' approached, but in the meantime ready to move the distance w in the direction of arrow a Has. Because of the longitudinal extension of the nozzle 8 can also the foreign matter 1 '' was just excreted in this new relative position become.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP01104274A 2001-02-22 2001-02-22 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut Withdrawn EP1234901A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01104274A EP1234901A1 (fr) 2001-02-22 2001-02-22 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut
PCT/EP2002/001629 WO2002068740A1 (fr) 2001-02-22 2002-02-15 Procede et dispositif place sur une carde destines a identifier et a retirer des matieres etrangeres d'un materiau fibreux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01104274A EP1234901A1 (fr) 2001-02-22 2001-02-22 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut

Publications (1)

Publication Number Publication Date
EP1234901A1 true EP1234901A1 (fr) 2002-08-28

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Application Number Title Priority Date Filing Date
EP01104274A Withdrawn EP1234901A1 (fr) 2001-02-22 2001-02-22 Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse, en particulier du coton brut

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EP (1) EP1234901A1 (fr)
WO (1) WO2002068740A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233011B4 (de) 2002-07-20 2020-03-19 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Spinnereimaschine zur Erfassung und Beurteilung von Textilfasermaterial

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4657144A (en) * 1985-02-25 1987-04-14 Philip Morris Incorporated Method and apparatus for detecting and removing foreign material from a stream of particulate matter
DE4322345A1 (de) * 1992-08-24 1994-03-03 Jossi Hans Praezisionsmechanik Verfahren und Vorrichtung zum Ausscheiden von Metallteilen aus einem Materialstrom
US5544090A (en) * 1992-12-31 1996-08-06 Zellweger Uster, Inc. Removal of undesirable entities in thin webs of textile materials
DE19627194A1 (de) * 1995-09-25 1997-03-27 H J Scheinhuette Entwicklungen Karde mit Vorrichtung zum Ausscheiden von Fremdfasern
US5761771A (en) * 1995-05-05 1998-06-09 Trutzschler Gmbh & Co. Kg Apparatus for detecting and separating foreign bodies from a fiber tuft flow

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627498A5 (de) * 1978-04-26 1982-01-15 Zellweger Uster Ag Verfahren und vorrichtung zur ausregulierung von bandgewichtsschwankungen an karden, krempeln und strecken.
DE19543526C5 (de) * 1995-11-22 2015-10-01 Hubert Hergeth Verfahren zum selektiven Ausschleusen von Fremdteilen an einer Öffnungs- oder Abnahmewalze einer Textilmaschine
DE59808078D1 (de) * 1998-09-07 2003-05-28 Jossi Holding Ag Islikon Verfahren und Vorrichtung zum Ausscheiden von Fremdstoffen in Fasermaterial, insbesondere in Rohbaumwolle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4657144A (en) * 1985-02-25 1987-04-14 Philip Morris Incorporated Method and apparatus for detecting and removing foreign material from a stream of particulate matter
DE4322345A1 (de) * 1992-08-24 1994-03-03 Jossi Hans Praezisionsmechanik Verfahren und Vorrichtung zum Ausscheiden von Metallteilen aus einem Materialstrom
US5544090A (en) * 1992-12-31 1996-08-06 Zellweger Uster, Inc. Removal of undesirable entities in thin webs of textile materials
US5761771A (en) * 1995-05-05 1998-06-09 Trutzschler Gmbh & Co. Kg Apparatus for detecting and separating foreign bodies from a fiber tuft flow
DE19627194A1 (de) * 1995-09-25 1997-03-27 H J Scheinhuette Entwicklungen Karde mit Vorrichtung zum Ausscheiden von Fremdfasern

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Publication number Publication date
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