EP0394185B1 - Vorrichtung zum Detektieren von Nissen in bandförmigem textilem Fasermaterial - Google Patents

Vorrichtung zum Detektieren von Nissen in bandförmigem textilem Fasermaterial Download PDF

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Publication number
EP0394185B1
EP0394185B1 EP90810021A EP90810021A EP0394185B1 EP 0394185 B1 EP0394185 B1 EP 0394185B1 EP 90810021 A EP90810021 A EP 90810021A EP 90810021 A EP90810021 A EP 90810021A EP 0394185 B1 EP0394185 B1 EP 0394185B1
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EP
European Patent Office
Prior art keywords
fibres
stream
air
measuring
instrument
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 - Lifetime
Application number
EP90810021A
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German (de)
English (en)
French (fr)
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EP0394185A1 (de
Inventor
Hans-Jürgen Scheinhütte
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.)
SCHEINHUETTE HANS JUERGEN
Original Assignee
SCHEINHUETTE HANS JUERGEN
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.)
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Publication date
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Application filed by SCHEINHUETTE HANS JUERGEN filed Critical SCHEINHUETTE HANS JUERGEN
Publication of EP0394185A1 publication Critical patent/EP0394185A1/de
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/26—Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices

Definitions

  • the invention relates to a device for detecting nits in band-shaped textile fiber material.
  • these tapes also contain so-called nits.
  • nits are fiber entanglements and knots of different sizes. The causes of their emergence are diverse. Among other things, you can also lie in an unsuitable, defective or worn card clothing.
  • Monitoring the frequency of the nits in the card sliver allows both conclusions to be drawn about the raw material and the condition of the clothing. In particular, the time of regrinding the set can be determined.
  • the number of nits has been determined so that a piece of card sliver has been removed and pulled apart in a drafting system. Afterwards, the nits or impurities that appeared in the view as darker areas could be visually or manually counted using a magnifying glass. The assessment of the samples is subject to a certain discretion of the assessor. So there is no general standard.
  • CH 519 596 describes a measuring device in which a e.g. the sample tape taken from the card sliver is pulled out so strongly by a stretching device that defects and nits can be identified optically or capacitively.
  • a stretching device that defects and nits can be identified optically or capacitively.
  • the invention uses part of a spin box of an open-end spinning machine for processing the cotton instead of two miniature cards.
  • the card sliver is largely dissolved in individual phases using a special opening roller, which is then sucked through a narrowing channel with the help of an air stream and finally reaches a high-speed rotor, from which it is drawn off as yarn.
  • the measuring device which flies through the fibers is arranged behind the air duct instead of the rotor. Since the arrangement described is completely unsuitable for dissolving nits, they also fly through the unchanged Measuring device. Compared to the fiber flow, they cause a significant instantaneous mass increase and can be distinguished from the fibers by a variety of different methods.
  • the card sliver 1 is drawn into the device by the conveyor roller 2.
  • the opening roller 3 already tears the fibers predominantly individually from the belt.
  • the fibers loop around the clothing teeth of the opening roller and thereby adhere to them.
  • they are detached from the clothing by an air stream and fly through the air duct 5 and the measuring device 6.
  • the fiber density is only a few fibers per mm.
  • This fiber density is not constant, but density changes occur due to the statistical distribution and the length of the fibers with low gradients.
  • the nits also fly through channel 5 and the measuring device 6. They cause a strong spontaneous increase and decrease in the fiber density and thereby generate a striking electrical signal in the measuring device.
  • the capacitance of a capacitor can be measured, the dielectric of which is partly formed by the air flow with the fibers. You can also illuminate the fiber stream and measure the penetrating light, as happens with a so-called yarn cleaner. Such The arrangement is shown in Fig.2.
  • the sensor 13 detects the light from the light source 12 reduced by the fiber stream 11. If the light sources 14 and 14 'are used instead of 12, it receives the light reflected by the fibers. With optics 16, the fibers can also be imaged on a line-shaped sensor 13, which consists of the elements 15, as shown in FIG. 3.
  • the fiber stream 11 here runs perpendicular to the plane of the drawing.
  • the optimal method results from the necessary effort on the one hand and security against misinterpretation on the other. This is because impurities and shell parts are sucked through the measuring device 6. However, the majority of these particles is already excreted by the opening roller and collects in the trash container 7.
  • the fibers fly through the diffuser 8 after the measuring device and collect in the filter 9, while the air is blown out of the device by the fan 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
EP90810021A 1989-04-18 1990-01-09 Vorrichtung zum Detektieren von Nissen in bandförmigem textilem Fasermaterial Expired - Lifetime EP0394185B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH145789A CH674378A5 (enrdf_load_stackoverflow) 1989-04-18 1989-04-18
CH1457/89 1989-04-18

Publications (2)

Publication Number Publication Date
EP0394185A1 EP0394185A1 (de) 1990-10-24
EP0394185B1 true EP0394185B1 (de) 1996-04-10

Family

ID=4210914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810021A Expired - Lifetime EP0394185B1 (de) 1989-04-18 1990-01-09 Vorrichtung zum Detektieren von Nissen in bandförmigem textilem Fasermaterial

Country Status (3)

Country Link
EP (1) EP0394185B1 (enrdf_load_stackoverflow)
CH (1) CH674378A5 (enrdf_load_stackoverflow)
DE (1) DE59010268D1 (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669401A5 (enrdf_load_stackoverflow) * 1988-03-02 1989-03-15 Loepfe Ag Geb

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH519596A (de) * 1970-11-05 1972-02-29 Ts B Techniczne Przemyslu Masz Verfahren zur Bestimmung der Fehler- und Verunreinigungszahl von Karden- und Kämm-Maschinenvliesen sowie Einrichtung zur Durchführung des Verfahrens
US3889319A (en) * 1973-10-23 1975-06-17 Crompton & Knowles Corp Method and system for producing blended textile fibrous materials
DE3644535A1 (de) * 1986-12-24 1988-07-14 Truetzschler & Co Verfahren und vorrichtung zum erkennen von fremdkoerpern wie fremdfasern, bindfaeden, kunststoffbaendchen, draehten o. dgl. innerhalb von bzw. zwischen textilfaserflocken
BE1000294A3 (nl) * 1987-02-05 1988-10-11 Wetenschappelijk En Tech Ct Va Werkwijze voor het meten van de garendichtheid van een weefsel of de steekdichtheid van een breisel en inrichting voor het uitvoeren van deze werkwijze.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669401A5 (enrdf_load_stackoverflow) * 1988-03-02 1989-03-15 Loepfe Ag Geb

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MELLIAND TEXTILBERICHTE INTERNATIONAL Band 64, Nr. 12, Dezember 1983, Seiten 875-881, Ludwigsburg, DE *
Sasser P.E., Eine objektive Messmethode für die Nissenzählung; 1988, Faserinstitut Bremen e.V. in der Bremer Baumwollbörse, Bremen, 6 Seiten) *

Also Published As

Publication number Publication date
DE59010268D1 (de) 1996-05-15
EP0394185A1 (de) 1990-10-24
CH674378A5 (enrdf_load_stackoverflow) 1990-05-31

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