EP0369121A1 - Procédé de chauffage dans des machines textiles - Google Patents

Procédé de chauffage dans des machines textiles Download PDF

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Publication number
EP0369121A1
EP0369121A1 EP89115305A EP89115305A EP0369121A1 EP 0369121 A1 EP0369121 A1 EP 0369121A1 EP 89115305 A EP89115305 A EP 89115305A EP 89115305 A EP89115305 A EP 89115305A EP 0369121 A1 EP0369121 A1 EP 0369121A1
Authority
EP
European Patent Office
Prior art keywords
drafting
field
drafting system
fiber
delay
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Withdrawn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
EP89115305A
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German (de)
English (en)
Inventor
Hans Schellenberg
Werner Nabulon
Armin Wirz
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
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4250919&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0369121(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0369121A1 publication Critical patent/EP0369121A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D02G1/122—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes introducing the filaments in the stuffer box by means of a fluid jet

Definitions

  • This invention relates to a drafting system for a flyer-less spinning process.
  • flyerless Spinning processes have been developed that should work on the basis of a draft feeding of the fiber material to be spun.
  • the drafting systems for such spinning processes have to work with a very high total distortion, which far exceeds the distortion of the ring spinning machine that is conventional today.
  • the latter machine is of course designed to process the roving pre-stretched by the flyer.
  • the roving is already twisted slightly, and the drafting system of a ring spinning machine has two tasks accordingly: - cancel the twists of the roving, - to refine (stretch) the material released from the twist to the thread number.
  • the first task is carried out by the drafting area of the drafting system, whereby a very low delay (1.1 to 1.3) is sufficient.
  • the actual warping usually takes place in the main delay field with the maximum possible delay for a single delay field (approx. 40 to sometimes 50 times).
  • a high drafting system therefore normally comprises at least one pre-drafting field and one main drafting field, i.e. at least three pairs of rollers.
  • a push rod in the aforementioned "push rod drafting system" from the company Platt Brothers belongs to this category of measures.
  • DE-PS 945 822 It is also known from DE-PS 945 822 to arrange a sliver voltage sensor in the pre-draft field and to regulate the pre-draft based on the output signal from this sensor.
  • the sensor includes a sensor that has to redirect the fiber stream in order to generate a voltage signal. The deflection caused by the sensor must be variable so that the output signal can change with the match voltage.
  • the invention provides a high drafting system with at least one pre-draft field and at least one main draft field.
  • the main delay field results in a delay greater than 30 and the advance delay field results in a delay greater than 2, i.e. the drafting system results in a total delay of at least 60.
  • the invention is characterized in that an element for predetermined deflection of the fiber stream is arranged in the pre-drafting field.
  • the pre-delay field can be one of a plurality of such fields, each field being able to be provided with a respective element for fiber deflection.
  • the element can advantageously also be designed as a fiber flow limiting means for limiting the propagation of the fiber stream in the pre-drafting field. However, since such an element does not surround the fiber stream, but leaves it free in at least one direction, this arrangement does not create any additional problems when new guiding the fuse into the drafting system.
  • the predetermined deflection of the fiber stream can be achieved in that the element is either rigidly mounted on a carrier or in such a way that the element cannot yield under the pressure exerted by the fiber stream.
  • the ratio width: height of the fuse on the element should be chosen so that as many fibers as possible are exposed to a rice force on the element. This ratio is preferably at least 3: 1 and more preferably at least 4: 1.
  • the element is advantageously in the middle of the pre-delay field, i.e. in the middle third of the decency of the two clamping points of the pre-delay field.
  • the drafting system can advantageously be used in a spinning machine which processes a template made of non-twisted material into a yarn.
  • the tex value of this material when imported into the drafting system can far exceed that of the ring spinning roving, e.g. are over 1000 tex.
  • the overall arrangement must have a very high delay (of more than 150), which necessitates a relatively high delay in the pre-delay field (preferably at least 4).
  • the drafting system shown in FIG. 1 is designed for a jet spinning machine and comprises a pair of delivery rollers LP, a pair of center rollers MP and an input roller pair EP.
  • the fiber material to be spun is drawn into the drafting system from left to right from a suitable template (not shown), drawn and conveyed by the delivery roller pair LP to a nozzle arrangement (not shown) for false twist spinning.
  • the original material has a tex of over 1000.
  • the input roller pair EP and the middle roller pair MP together form a pre-drafting zone with a distortion, preferably in the range 4-8.
  • the center roller pair MP and the delivery roller pair LP together form a main drafting zone with a distortion, preferably greater than 30 and possibly of about 40.
  • the drafting system shown is a so-called Double apron drafting system, ie the upper and lower rollers of the middle roller pair MP are each provided with an apron R which extends from the respective roller into the main drafting zone in order to improve the fiber guidance in this drafting zone.
  • this arrangement is not essential to the invention.
  • An alternative solution, which is based on a so-called kepa drafting arrangement, has been described in our Swiss patent application No. 2723/88 and could also be used in connection with this invention.
  • a push rod D is designed in the pre-drafting zone of the pair of input rollers EP in order to easily redirect the fiber flow FS in this field and thereby improve the fiber guidance in this drafting zone.
  • Such an improvement in the fiber guidance can be demonstrated by an improvement in the yarn values achievable by the spinning station, namely by increasing the tensile strength and elongation and reducing the CV Uster values, thinning, thickening and netting.
  • the improvement arises from the fact that in particular the shorter (but preferably as many) fibers on the push rod are subjected to a frictional force. These tearing forces on the push rod limit the acceleration distance in the warpage, i.e. the distance to which shorter fibers are accelerated to the higher speed of the downstream pair of rollers.
  • the fiber guide surface F of the push rod D is provided with a “shoulder” S for laterally limiting the propagation of the fiber stream in the draft zone.
  • the area F should be formed as an area convexly rounded in the direction of the fiber flow.
  • the push rod D which serves as a deflecting element for the fiber stream, is preferably rigidly mounted on a holder, not shown.
  • the latter can be carried stationary by the frame of the drafting system.
  • the rod D could, however, be rotatable about its own longitudinal axis.
  • the position of the push rod in the pre-draft field is important for the optimal effect. It is preferably located approximately in the middle of the field (between the two clamping lines delimiting this field).
  • Figure 1 shows the push rod on the "lower" side of the fuse i.e. on the same side as the positively driven rollers.
  • the push rod could also be arranged on the other side of the fuse.
  • the necessary deflection of the fibers is very small; a deflection of approx. 1 mm in relation to the path of the fibers in the absence of the rod is sufficient to achieve the necessary friction and the associated improvements.
  • the rod is not necessarily round (cylindrical) but preferably has the already mentioned convexly rounded, fiber-guiding surface F.
  • this surface F can also have a convex shape in the transverse direction, as is shown in FIG. 3.
  • This figure also shows with dashed lines the preferred design of the fuse on the push rod, namely as a relatively thin, wide layer.
  • the width of this layer is preferably in a ratio of 4: 1 or more to the layer depth.
  • Figure 1 shows two possible positions of the two rollers of the input pair EP against each other.
  • the upper (pressure) roller can either be arranged vertically above the lower roller (dashed) or offset in the direction of the original (fully extended).
  • the latter variant is for the combination with a match stop device according to our Switzerland Rischen patent application No. 2,957 / 88 advantageous.
  • the length of the pre-drafting field (between the clamping lines of the roller pairs EP and MP) cannot normally be significantly longer (without the push rod) than the average stack length of the material to be processed.
  • the use of a fiber-guiding rod enables the extension of the pre-drafting field, which is favorable for operating work in the pre-drafting field, since the adjustment work is thereby reduced when the stack is changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP89115305A 1988-08-29 1989-08-19 Procédé de chauffage dans des machines textiles Withdrawn EP0369121A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH320488 1988-08-29
CH3204/88 1988-08-29

Publications (1)

Publication Number Publication Date
EP0369121A1 true EP0369121A1 (fr) 1990-05-23

Family

ID=4250919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115305A Withdrawn EP0369121A1 (fr) 1988-08-29 1989-08-19 Procédé de chauffage dans des machines textiles

Country Status (4)

Country Link
US (1) US4999890A (fr)
EP (1) EP0369121A1 (fr)
JP (1) JPH02104730A (fr)
CN (1) CN1011991B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262956A2 (fr) * 1995-10-26 2002-12-04 Sony Corporation Procédé et dispositif de codage de la parole

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2041981C1 (ru) * 1989-11-11 1995-08-20 Бармаг АГ Фильера для текстурирования синтетической нити
EP1541727A1 (fr) * 2003-12-05 2005-06-15 Schärer Schweiter Mettler AG Diminution de la pression de travail dans une buse de texturation et texturation du fil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130759C2 (de) * 1971-06-22 1982-12-30 Hacoba Textilmaschinen Gmbh & Co Kg, 5600 Wuppertal Vorrichtung zum kontinuierlichen Behandeln, insbesondere Schrumpfen von textilem Faden- oder Garnmaterial
SE395599B (sv) * 1974-02-14 1977-08-22 Svenska Textilforskningsinst Forfaringsett och anordning for formning av textila material
NL7513161A (nl) * 1975-11-11 1977-05-13 Philips Nv Werkwijze ter vervaardiging van een halfgeleider- inrichting, en inrichting vervaardigd volgens de werkwijze.
IT1108000B (it) * 1977-11-08 1985-12-02 Barmag Barmer Maschf Procedimento per la produzione di un filato increspato da fibre aperte(open end)a multifilamenti
EP0021573B1 (fr) * 1979-05-18 1983-03-23 JAMES MACKIE & SONS LIMITED Procédé et appareil de texturation de fil thermoplastique
DE3206895A1 (de) * 1982-02-26 1983-09-15 Hoechst Ag, 6230 Frankfurt Verfahren zum kontinuierlichen faerben von textilen warenbahnen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Keine Recherche, Erkl{rung nach Regel 45 EP] *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262956A2 (fr) * 1995-10-26 2002-12-04 Sony Corporation Procédé et dispositif de codage de la parole
EP1262956A3 (fr) * 1995-10-26 2003-01-08 Sony Corporation Procédé et dispositif de codage de la parole

Also Published As

Publication number Publication date
CN1011991B (zh) 1991-03-13
CN1040831A (zh) 1990-03-28
JPH02104730A (ja) 1990-04-17
US4999890A (en) 1991-03-19

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