EP0926274B2 - Auge élastique d'alimentation - Google Patents

Auge élastique d'alimentation Download PDF

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Publication number
EP0926274B2
EP0926274B2 EP98811105A EP98811105A EP0926274B2 EP 0926274 B2 EP0926274 B2 EP 0926274B2 EP 98811105 A EP98811105 A EP 98811105A EP 98811105 A EP98811105 A EP 98811105A EP 0926274 B2 EP0926274 B2 EP 0926274B2
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EP
European Patent Office
Prior art keywords
feed
trough
feed trough
gap
roller
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
EP98811105A
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German (de)
English (en)
Other versions
EP0926274A3 (fr
EP0926274A2 (fr
EP0926274B1 (fr
Inventor
Olivier Wüst
René Schmid
Martin Tobler
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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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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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
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/14—Details of machines or apparatus
    • D01G9/16—Feeding arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/20—Feed rollers; Takers-in

Definitions

  • the invention relates to the design of the so-called trough of a feeding or feeding device for use in a textile machine, in particular a spinning machine.
  • feeder and feeder
  • feed device are synonymous here.
  • this term includes the synonymous term “collection device”.
  • spinning machines examples include cleaning machines (such as cleaners and openers), carding machines, hopper bins, mixers, and rotor spinning machines.
  • cleaning machines such as cleaners and openers
  • carding machines such as cleaners and openers
  • hopper bins such as hopper bins
  • mixers such as mixers
  • rotor spinning machines examples include rotor spinning machines. The invention is not limited to these application examples.
  • the feed trough of a spinning machine is usually formed as a rigid element. Examples can be found in US-B-4,275,483, and DE-A-44 39 564.
  • a trough in the form of a comb is described in connection with Figs. 8-10.
  • the comb is provided with a continuous wide terminal strip, on the one side open narrow terminal strips (prongs, teeth) are arranged.
  • the comb structure allows a corrugation in the direction of width, the longer the comb strips, the more.
  • the comb strips soften by the distance between them.
  • the terminal block is clamped on one side in a stationary holder.
  • the comb is made of an elastic material.
  • pedal troughs are also known (see FR-A-2 322 943, FR-A-2 322 942 and DE-Gbm-92 18 341).
  • a rigid feed trough is easy to manufacture and assemble, but has the disadvantage (especially at a working width of eg 1000 mm to 1500 mm or even more) that the clamping effect is distributed unevenly over the working width if the feed wadding has an uneven thickness or thickness ., Has an uneven density across the width.
  • the invention therefore provides a feed trough for use in a feed device having a feed roll and a feed trough.
  • the feed trough comprises a bending-resistant support element and at least one gap-forming element fastened to the support element.
  • the gap-forming element is elastically deformable.
  • the invention also includes a feed device with such a feed trough.
  • the gap-forming element is preferably elastically deformable in the longitudinal direction of the roller, in particular locally elastically deformable.
  • the element may locally deform elastically depending on thick or thin spots or foreign bodies in the feed wadding.
  • Fig. 1 is a known Wanderdeckelkarde, e.g. the card C50 of the applicant, shown schematically.
  • the fiber material is fed into the hopper 20 in the form of dissolved and cleaned flakes, taken over by a licker-in 32 (Fig. 3) (also called a briseur) as a cotton pad, transferred to a drum 40 (also called a drum), and through drum co-operation dissolved and cleaned with a decklid set 52.
  • the covers of the traveling lid set 52 are guided by a suitable drive system of the revolving flat unit via deflection rollers along a closed path (in the same direction or opposite to the direction of rotation of the drum).
  • Fibers from the web located on the drum 40 are removed by a pickup 70 and formed in a run-out section 80 consisting of different rolls to form a sliver 90.
  • This card sliver 90 is deposited by a sliver tray (not shown) in a transport can in cycloid turns.
  • An alternative construction of the card has been shown in EP-A-866153. The invention can also be used in the alternative construction. The content of EP-A-866 153 is thus integrated here.
  • Fig. 2 shows schematically a computer 4 with input and output signals. Signals are input from two sensors B5 and B6, which will be explained in more detail below, as well as signals which include, among other things, the speed of the card sliver at the exit (Va) and various data, e.g. Set targets for tape weight.
  • the basic principle of conventional belt regulation is based on two measures, namely a "long-term” regulation and a regulation with "short-term addition" at the inlet, where disturbances at the time of feeding are to be compensated.
  • a sensor detects B5, which is arranged on a feed trough 6B, the unevenness of the weight of the incoming Wattenvorlage. These correspond to the deflections of the pivotally mounted feed trough with respect to the feed roller 6A (see also FIG. 3).
  • the sensor B5, as shown in Fig. 1, the computer 4 provides a cross-sectional signal dependent 6.
  • the electronics influenced by the signal 7 via a control unit 8, the drive motor (not shown) of the feed roller 6A and thus the speed of the feed roller.
  • the further sensor B6 shown in FIG. 1 scans the outgoing card sliver and delivers an electrical signal 2 dependent on the band weight to the regulation (the computer) 4.
  • An actual value is read in as input signal 2 to the computer 4 independently of the exit speed and compared with the previously entered the electronics band weight setpoint, cf. Also Fig. 2.
  • the speed of the feed roller is influenced accordingly by the controller to keep the weight of the strip in the outlet constant.
  • the sensor B5 provides readings used by the computer 4 for the "short term addition", while the sensor B6 provides readings used by the computer 4 to realize “long term regulation”.
  • the latter regulation is not relevant to this invention and will not be further mentioned. Details of the overall regulation can be found in EP-A-799 915.
  • the feed trough 6B of Fig. 3 is a rigid (bending-resistant) structure. It extends over the entire length of the roller 6A, i. over the working width of the machine.
  • the feed wad is threaded into the converging gap between the trough 6B and the roller 6A, after which it is conveyed to the opener roller (the licker-in) 32 by the rotation of the roller 6A.
  • the feed trough 6B is pressed against the roller 6A by a compression spring 6C, the rotation axis of the roller being fixedly mounted in the machine frame (not shown).
  • the trough 6B is pivotally mounted about the axis 6D by a bracket 6E. With changes in the fiber mass (density and / or thickness) in the original wadding, the trough is pressed more or less far by the spring 6C against the roller.
  • a displacement sensor (not shown) is provided to sense the changes in the position of the well 6B.
  • An alternative to the displacement sensor is shown in EP-C-275 471. These sensors are well suited to sense watt thickness changes in the wadding transport direction.
  • a conventional card has a working width of about 1000 mm - the working width of the feeding device with roller 6A and trough 6B must be at least equal.
  • carding machines having a larger working width for example 1300 mm, 1500 mm or even 2000 mm
  • a flexure resistant feed tray 6B is not adapted to sense non-uniformities in watt thickness over the working width. If there are substantial changes in the thickness of the wadding over the width, the trough 6B "rides" on the thickest zone of the wadding or on a foreign body moving along with the wadding. This zone is therefore pressed against the roller 6A, but less thick zones are left relatively loose.
  • roller 32 rips at best "tufts" (instead of individual fibers) from the poorly maintained Wattenzonen.
  • the "readout" by the displacement sensor is actually no longer representative of the average watt thickness in the gap between the trough and the roller.
  • the feed trough 20 comprises a holder 21, a bending-resistant hollow profile 22 and an arcuate, gap-forming element 24 which cooperates with the feed roller 6A (FIG. 3, not shown in FIG. 4).
  • the holder 21 is provided with a pivot bearing 25 (indicated only schematically) for pivoting about the axis 6D ( Figure 3).
  • the profile 22 has a projection 23 for receiving a compression spring member (not shown), similar to the spring 6C (Fig. 3).
  • a displacement sensor (not shown) cooperates with the profile 22.
  • the news relates in particular to the gap-forming element 24, which will be described below.
  • the element 24 is formed in one piece with the profile 22 and extends over the entire length of the profile 22, which corresponds to the working width.
  • the elongate member 22 has a "root zone” 26 which merges into a protrusion 28 protruding from the profile 22 and a freestanding edge 30.
  • the thickness "d" of the element at the edge 30 is considerably smaller than the thickness "D" in FIG the root zone.
  • the thickness "d” is e.g. less than 5 mm (for example, 2 to 4 mm), while the thickness D may be 8 mm or more.
  • the cross section of the element 24 is the same as possible over its entire length.
  • the proportions of the element 24 and the material of this element are chosen so that the element 24 can deform elastically locally (locally, in a zone delimited by the total length) if in the corresponding local zone of the gap between the trough 20 and the roller 6A, a particularly thick or dense fiber group appears, whereas in other splitting zones the fiber mass corresponds more to an average value. This effect is shown schematically in FIG.
  • Fig. 5 shows the feed roller 6A and a feed trough 30 with a carrier 32 (in the form of a rod) and an arcuate, gap-forming element 34.
  • Element 34 is attached via a leg 36 to the carrier 32.
  • the holder for the carrier 32 is omitted from FIG. 5 - it may be formed according to FIG. 3 or FIG. 4 of the present application or, for example, according to EP-C-275 471.
  • the cotton wool is not shown in Fig. 5 for the sake of simplicity. However, if it has a certain average value, a corresponding gap width SB results (in the vicinity) of the freestanding edge 38 of the element 34. If the fiber mass of the wadding is uniformly distributed over the working width, a substantially uniform gap width SB results over the working width. However, if there is a "thick spot" in the batting, sooner or later it will get between the element 34 and the roller 6A, causing a local (localized) deformation of the element 34, which is exaggerated in FIG. Deformation zone "DZ is indicated.
  • the fiber material thus remains outside of the deformation zone DZ sufficiently firmly held between the element 34 and the roller 6A, so that even in the presence of a thick spot the opener roller (not shown in Fig. 5) must comb through a her offered "tuft” and not only Tufts can tear out of the weak fiber structure.
  • the invention will also work in the presence of a thin spot, provided that the element 34 is sufficiently biased against the roller 6A.
  • the (thrust) forces generated in the element 34 (Fig. 5) and 24 (Fig. 4) by the clamped fiber mass must be passed from the elastic member 34,24 to the carrier 32,22. Since the carrier (in relation to these forces) represents a rigid structure, the forces generated on the elastic element are "integrated" on the carrier.
  • the aforesaid sensor (not shown) therefore responds to the resultant of the wearer of all forces generated in the elastic element.
  • the invention is not limited to application in the context of regulation - there need not be a sensor.
  • the new feed trough can thus effectively clamp tampons of different thicknesses over the entire working width.
  • (at least larger) foreign bodies do not penetrate to the elastic zone.
  • a body is e.g. clamped in front of the elastic edge zone between the element 24 and the feed roller. Since the element upstream of the edge zone is more rigid, the reaction forces on the element 24 for lifting the element against the bias of the spring not shown, i. the feed trough rotates as a whole about the axis 25.
  • the fact can be detected by another sensor and its output signal can lead to shutdown of the cotton wool feed, e.g. by switching off the drive for the feed roller. At the same time, an alarm can be triggered so that the error is corrected by the operator.
  • the elastic edge zone (or edge strip) comprising the free edge may have a small dimension transverse to the working width (length of the profile), i. in the transport direction, for example 10 to 20 mm, preferably about 14 mm to 16 mm.
  • the design of the gap between the element 24 and the feed roller 6A ( Figures 3 and 5, respectively) can thus be changed from the present conventional design, namely by the relatively wide "mouth" (where the precoat enters the nip) is eg 10 to 20 mm, preferably about 15 mm.
  • the gap width at the licker-in (at the free edge of the trough), on the other hand, is relatively small, e.g. 0.1 mm i. the minimum required to avoid touching the edge with the feed roller 6A.
  • the cotton is therefore compressed relatively little between the element 24 and the roller 6A until it enters the gap between the elastic zone and the roller.
  • the reaction forces exerted on the trough thus arise for the most part in the elastic zone.
  • the outgoing from the feed roller 6A conveying effect on the cotton is also reduced, which must be compensated if necessary by an additional funding (upstream of the trough). It may prove advantageous to provide a run-in plate directly in front of the mouth of the nip to facilitate insertion of the batt into the nip.
  • the carrier 22 should be formed as a rigid, in particular torsion-resistant element.
  • a hollow profile is the ideal shape, but is not essential to the invention.
  • the feed trough can be rotated as a whole about the axis 25 until it abuts against a stop (not shown).
  • a stop not shown.
  • the invention is not limited to a variant in which the elastic element extends over the entire working width.
  • the elastic element could be attached to a common carrier.
  • the preferred variant comprises a continuous casting profile with an elastic element formed thereon from one piece.
  • the elasticity of the gap-forming element can be adapted to the requirements by adapting the material (eg Al alloy, cast iron, steel), its thickness and its "width", whereby the "width” here refers to the length of the element in the fiber transport direction (ie, the arc length).
  • the surface facing roll 6A should be machined to ensure that it is fiber free and forms the proper nip shape with the roll.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (13)

  1. Auge d'alimentation (20,30) utilisée dans un dispositif d'alimentation, avec un rouleau d'alimentation (6A) et une auge d'alimentation (20,30), qui comprend un élément porteur (22,32) résistant à la flexion et au moins un élément (24,34) formant une fente avec une lisière libre (38), fixé sur l'élément porteur (22,32),
    caractérisée par le fait que
    la zone limite de propagation de l'élément formant une fente (24,34), qui comprend la lisière libre (38), est déformable d'une manière élastique et présente une dimension petite transversalement de la largeur du travail.
  2. Dispositif d'alimentation avec un rouleau d'alimentation et une auge d'alimentation (20,30),
    caractérisé par le fait que
    l'auge d'alimentation (20,30) est formée selon revendication 1.
  3. Auge d'alimentation (20,30) selon revendication, ou dispositif d'alimentation selon revendication 2,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est déformable d'une manière élastique dans le sens longitudinal du rouleau (6A).
  4. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 3,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est déformable d'une manière élastique localement.
  5. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 4,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est formé d'une seule pièce sur la longueur du rouleau (6A).
  6. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon revendication 5,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est formé d'une seule pièce avec l'élément porteur (22,32).
  7. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 6,
    caractérisée par le fait que
    l'élément porteur (22,32) est formé comme profil creux.
  8. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 7,
    caractérisée par le fait que
    l'élément porteur (22,32) est pourvu d'une fixation (21), par exemple, sous forme d'une partie de palier, afin d'agir conjointement avec un axe de pivotement.
  9. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 8,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est formé en forme d'arc, avec une arête longitudinale isolée et un côté longitudinal fixé sur l'élément porteur (22,32).
  10. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 9,
    caractérisée par le fait que
    l'épaisseur de l'élément formant une fente (24,34) diminue dans la direction de transport des fibres.
  11. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendication 1 à 10,
    caractérisée par le fait que
    l'auge d'alimentation (20,30) travaille conjointement avec un détecteur (par exemple, un capteur de déplacement ou un capteur de force), afin de former un organe de mesure pour la masse de fibres se trouvant entre l'auge d'alimentation (20,30) et le rouleau (6A).
  12. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon l'une des revendications 1 à 11,
    caractérisée par le fait que
    l'élément formant une fente (24,34) est élastique seulement dans une zone marginale possédant une arête libre.
  13. Auge d'alimentation (20,30) respectivement dispositif d'alimentation selon revendication 12,
    caractérisée par le fait que,
    dans la direction de transport des fibres, la zone marginale possède une dimension allant de 10 à 30 mm.
EP98811105A 1997-12-23 1998-11-04 Auge élastique d'alimentation Expired - Lifetime EP0926274B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH295297 1997-12-23
CH295297 1997-12-23

Publications (4)

Publication Number Publication Date
EP0926274A2 EP0926274A2 (fr) 1999-06-30
EP0926274A3 EP0926274A3 (fr) 2000-08-23
EP0926274B1 EP0926274B1 (fr) 2004-06-02
EP0926274B2 true EP0926274B2 (fr) 2007-05-30

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ID=4245343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811105A Expired - Lifetime EP0926274B2 (fr) 1997-12-23 1998-11-04 Auge élastique d'alimentation

Country Status (2)

Country Link
EP (1) EP0926274B2 (fr)
DE (1) DE59811509D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108677284A (zh) * 2018-04-24 2018-10-19 东华大学 基于在线梳理力的梳棉自调匀整方法及其装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19855571A1 (de) * 1998-12-02 2000-06-08 Truetzschler Gmbh & Co Kg Vorrichtung an einer Spinnereimaschine zum Herstellen eines Faserverbandes, z.B. aus Baumwolle, Chemiefasern
DE102008003099A1 (de) * 2008-01-03 2009-07-09 Hubert Hergeth Einzugsmulde
DE102011108615A1 (de) * 2011-07-27 2013-01-31 Hubert Hergeth Muldenbefestigung
CH713690A1 (de) * 2017-04-13 2018-10-15 Rieter Ag Maschf Speisemulde und Speisevorrichtung.
CH713692A1 (de) * 2017-04-13 2018-10-15 Rieter Ag Maschf Speisevorrichtung.
CH713691A1 (de) * 2017-04-13 2018-10-15 Rieter Ag Maschf Speisemulde und Speisevorrichtung mit einer Speisemulde.

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE724906C (de) † 1939-12-31 1942-09-09 Siemens Ag Einrichtung zum Ein- und Ausschalten eines Wechselstromkreises in Abhaengigkeit von einer zu regelnden Groesse, die einen kippfaehigen Schwingungskreis steuert
EP0275471B1 (fr) † 1986-12-12 1991-04-24 Maschinenfabrik Rieter Ag Procédé et appareil pour égaliser la densité d'un voile de fibres à l'entrée d'une machine textile
DE4200394A1 (de) † 1991-03-19 1992-09-24 Truetzschler & Co Vorrichtung zum reinigen und oeffnen von in flockenform befindlichem fasergut z. b. baumwolle, synthetischem fasergut u. dgl.
DE4334035A1 (de) † 1992-12-23 1994-06-30 Truetzschler Gmbh & Co Kg Vorrichtung zum Einspeisen von in Flockenform befindlichem Fasergut, z. B. Baumwolle, synthetischem Fasergut u. dgl. für eine Spinnereivorbereitungsmaschine, z. B. Karde, Reiniger u. dgl.

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AT373633B (de) * 1978-12-04 1984-02-10 Temafa Textilmaschf Meissner Vorrichtung zum oeffnen und reinigen von faserabfaellen
DE3827520A1 (de) * 1988-08-12 1990-02-15 Rieter Ag Maschf Abgesaugte gleichlaufspeisevorrichtung fuer eine karde
DE3923060A1 (de) * 1989-07-13 1991-01-24 Schubert & Salzer Maschinen Offenend-spinnvorrichtung
DE4038838B4 (de) * 1990-01-23 2005-12-22 Trützschler GmbH & Co KG Vorrichtung zum Speisen von in Flockenform befindlichem Fasergut, z. B. Baumwolle, Chemiefasern u. dgl., zu Verarbeitungsmaschinen
JPH0598520A (ja) * 1991-04-18 1993-04-20 Iwamoto Seisakusho:Kk 繊維材料供給装置
DE4416977C2 (de) * 1994-05-13 1996-12-19 Rieter Ingolstadt Spinnerei Offenend-Spinnvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE724906C (de) † 1939-12-31 1942-09-09 Siemens Ag Einrichtung zum Ein- und Ausschalten eines Wechselstromkreises in Abhaengigkeit von einer zu regelnden Groesse, die einen kippfaehigen Schwingungskreis steuert
EP0275471B1 (fr) † 1986-12-12 1991-04-24 Maschinenfabrik Rieter Ag Procédé et appareil pour égaliser la densité d'un voile de fibres à l'entrée d'une machine textile
DE4200394A1 (de) † 1991-03-19 1992-09-24 Truetzschler & Co Vorrichtung zum reinigen und oeffnen von in flockenform befindlichem fasergut z. b. baumwolle, synthetischem fasergut u. dgl.
DE4334035A1 (de) † 1992-12-23 1994-06-30 Truetzschler Gmbh & Co Kg Vorrichtung zum Einspeisen von in Flockenform befindlichem Fasergut, z. B. Baumwolle, synthetischem Fasergut u. dgl. für eine Spinnereivorbereitungsmaschine, z. B. Karde, Reiniger u. dgl.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108677284A (zh) * 2018-04-24 2018-10-19 东华大学 基于在线梳理力的梳棉自调匀整方法及其装置
CN108677284B (zh) * 2018-04-24 2020-07-14 东华大学 基于在线梳理力的梳棉自调匀整方法及其装置

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Publication number Publication date
EP0926274A3 (fr) 2000-08-23
EP0926274A2 (fr) 1999-06-30
DE59811509D1 (de) 2004-07-08
EP0926274B1 (fr) 2004-06-02

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