EP3610060B1 - Auge d'alimentation et dispositif d'alimentation pourvu d'une auge d'alimentation - Google Patents

Auge d'alimentation et dispositif d'alimentation pourvu d'une auge d'alimentation Download PDF

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Publication number
EP3610060B1
EP3610060B1 EP18717129.3A EP18717129A EP3610060B1 EP 3610060 B1 EP3610060 B1 EP 3610060B1 EP 18717129 A EP18717129 A EP 18717129A EP 3610060 B1 EP3610060 B1 EP 3610060B1
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EP
European Patent Office
Prior art keywords
elastic lip
feed trough
contact surface
set forth
contact
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.)
Active
Application number
EP18717129.3A
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German (de)
English (en)
Other versions
EP3610060A1 (fr
Inventor
Pavel JELINEK
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
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Maschinenfabrik Rieter AG
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Publication of EP3610060A1 publication Critical patent/EP3610060A1/fr
Application granted granted Critical
Publication of EP3610060B1 publication Critical patent/EP3610060B1/fr
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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
    • 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
    • D01G15/40—Feeding apparatus
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a feed trough for a feed device on a spinning preparation machine with a base body and at least one elastic lip extending along a working width of the feed trough and a feed device for feeding fiber tufts into a spinning preparation machine with a feed roller and a feed trough.
  • the feeding trough has a gap-forming element which is fastened to a carrier element and which is designed to be elastically deformable.
  • at least larger foreign bodies do not penetrate as far as the elastic zone.
  • Such bodies are already clamped in front of the elastic edge zone between the gap-forming element and the feed roller.
  • the feeding trough then rotates as a whole about an axis against the preload of a spring. This fact is recorded by a sensor and the foreign body is thus detected.
  • the foreign body detection can then lead, for example, to switching off the drive for the feed roller and/or to the triggering of an alarm.
  • the disadvantage of the mentioned feeding trough is that the entire feeding trough has to be designed to be rotatable about an axis. Since the gap formed by the gap-forming element must have a precise width in order to clamp the fiber material with the desired thickness, the feeding trough must also be positioned exactly. In connection with a feeding trough designed to be rotatable about an axis, this means a considerable construction effort.
  • FR 1 411 766 A a feed trough having a contact surface located above the feed roller, and means for detecting contact between the feed roller and the contact surface.
  • the disadvantage of this construction is that the axis of the feed roller must be movable or displaceable relative to the machine frame.
  • a feeding trough for a feeding device on a spinning preparation machine is proposed.
  • the spinning preparation machine can be a card, a roller card or a cleaner.
  • the feeding trough has a base body and at least one elastic lip extending along a working width of the feeding trough. The elastic lip forms a gap between itself and a feed roller of the feed device.
  • the feeding trough has a contact surface and means are provided for detecting contact between the elastic lip and the contact surface. If the elastic lip is deformed by a foreign body, then it comes into contact with the contact surface, provided the foreign body and thus the elastic deformation are large enough. The contact and thus also the foreign body are detected by the means for detecting a contact.
  • the means for detecting a contact include electrical insulation between the elastic lip and the contact surface, and an electrical voltage source.
  • the electrical voltage source applies a voltage between the elastic lip and the contact surface, and the contact between the elastic lip and the contact surface is detected by closing the electric circuit. In this way, contact between the elastic lip and the contact surface can be detected easily and inexpensively, with the electronics required for this in particular being inexpensive and robust.
  • the voltage applied by the electrical voltage source between the elastic lip and the contact surface is between 1.5 V and 32 V, preferably between 12 V and 28 V.
  • these voltages are easy to generate and, on the other hand, they do not require extremely sensitive detectors. Furthermore, the voltages are small enough not to pose a health hazard to operators should contact occur with one or both of the electrodes.
  • the means for detecting a contact can have a piezoelectric element.
  • Piezoelectric elements are also inexpensive, reliable and largely maintenance-free.
  • the piezoelectric element can be attached to the elastic lip and/or to the contact surface. When there is contact between the elastic lip and the contact surface, pressure is then exerted on the piezoelectric element, which in turn results in an electrical voltage that is detected by a sensor system.
  • the elastic lip and the contact surface form an opening to a cavity which, among other things, allows the mobility of the elastic lip. So that this cavity does not get dirty, a seal is advantageously arranged between the elastic lip and the contact surface. This seal can be deformed to such an extent that it can be overpressed when the elastic lip is deformed and thus does not impede the electrical contact between the elastic contact surface or the pressure on the piezoelectric element.
  • a spacer bar is arranged between the base body of the feeding trough and the elastic lip. This makes it possible to achieve an optimal distance between the base body and the elastic lip for clamping the fiber material. So that this distance can be adjusted for different fiber lengths, the spacer strip is preferably exchangeable and/or adjustable. In the case of particularly large fiber lengths, above around 28 mm, the spacer strip can then be dispensed with entirely.
  • the elastic lip is made of steel, in particular chrome steel, since these materials have good elasticity with good spring strength. Chromium steel is also corrosion-resistant.
  • a wall thickness of the elastic lip at its front end is preferably between 1.0 mm and 4.0 mm, particularly preferably between 1.5 mm and 2 mm, since this provides the necessary spring strength.
  • the food trough has a support strip, with the contact surface being assigned to the support strip.
  • the support bar is arranged at such a distance from the elastic lip that the distance can be closed by elastic deformation of the elastic lip. In the absence of a support bar, a very large foreign object could deform the elastic lip enough to cause it to go out of its elastic range and then not return to its previous shape. The support bar prevents this and thus allows a longer service life of the elastic lip.
  • a particularly suitable material for the support strip is aluminum, since it has great dimensional stability with a low weight.
  • the feed trough is divided into at least two segments along its working width, with each segment being assigned an elastic lip. This simplifies the setting of the gap created by the elastic lip, since a constant gap width no longer has to be set over the entire working width.
  • a piezoelectric element is advantageously assigned to each segment, or the elastic lips assigned to the individual segments are electrically insulated from one another and assigned to separate circuits. It is therefore possible to detect a foreign body separately for each segment. If this is indicated to the operating personnel, then the search for the foreign body is simplified, the foreign body can consequently be removed more quickly and production can be resumed more quickly.
  • the feeding tray includes an audible and/or visual alarm which is triggered when there is contact between the resilient lip and the contact surface takes place. Such an alarm draws the operator's attention to this contact, and thus normally to a detected foreign body. The operating personnel can then stop production and/or remove the foreign body.
  • the feeding trough is designed according to the above description, it being possible for the features mentioned to be present individually or in any combination.
  • a feeding device for feeding fiber tufts into a spinning preparation machine, in particular a card, a card or a cleaner.
  • the feed device has a feed roller and a feed trough as described above.
  • the feeding trough thus has a base body, at least one elastic lip extending along a working width of the feeding trough, a contact surface and means for detecting contact between the elastic lip and the contact surface. This reduces the construction effort and the elastic lip can be adjusted more easily.
  • the feed device comprises a control device which interrupts the feed of the fiber tufts and stops the feed roller when there is contact between the elastic lip and the contact surface.
  • the control device preferably rotates it back by a predetermined or predeterminable angle. In this case, this angle is or is set in such a way that the foreign body reaches an area from which it can be easily removed by the operating personnel.
  • figure 1 shows a schematic side view of a card 1.
  • the fibers in the card 1 are transported from left to right.
  • a fiber mat 2 first runs over a feed plate 3 and then reaches a feed device 4.
  • the feed device 4 has a feed trough 5 which interacts with a feed roller 6.
  • the fiber mat 2 clamped between the feed trough 5 and the feed roller 6 is then fed to a licker-in roller 7 .
  • the non-woven fabric goes on to a spool 8 and is further processed between the spool 8 and a cover 9, shown very schematically here.
  • the nonwoven fabric is then removed from a doffer roller 10 and forwarded to a compression unit 11 where it is compressed to form a card sliver 12 .
  • FIG 2a shows a schematic side view of a feed device 4 according to the invention.
  • This feed device 4 can be part of the figure 1 shown card 1, but it can also be part of a card or a cleaner.
  • the feed device 4 has a feed trough 5 and a feed roller 6 .
  • a part of the licker-in roller 7 is also shown.
  • the food trough 5 has a base body 13 which is partially protected from wear and tear by a protective plate 14 . Furthermore, a spacer strip 15 is arranged on the base body 13 in order to enable an optimal distance between the base body 13 and an elastic lip 16 .
  • the spacer strip 15 is designed to be exchangeable, so that it can be adapted to the respective fiber length. In the case of very long fibers, the spacer strip 15 can even be omitted entirely.
  • the resilient lip 16 is arranged so that fibers can be pinched between it and the feed roller 6.
  • a support strip 17 is also arranged on the side of the elastic lip 16 facing away from the feed roller 6 .
  • the elastic lip 16 can be elastically deformed at least until it touches the support strip 17 .
  • the support strip 17 prevents further deformation of the elastic lip 16, for example due to a hard foreign body in the fiber material.
  • the elastic lip 16 is therefore not deformed in a region in which permanent deformation occurs. This always ensures that the elastic lip 16 returns to its original shape and position.
  • Electrical insulation 18 insulates the elastic lip 16 from the support strip 17.
  • the elastic lip 16 is connected to the support strip 17 via a voltage source 19 and a current measuring device 20. Since the resilient lip 16 is electrically isolated from the support bar 17, the circuit is normally open and the current measuring device 20 does not measure current. If, on the other hand, the elastic lip 16 is deformed, for example by a hard foreign body, to such an extent that it touches a contact surface 21 of the support strip 17, then the circuit is closed and current flows, which the current measuring device 20 measures.
  • the current measuring device 20 is connected to an acoustic and/or visual alarm 22, which indicates the foreign body to the operator.
  • the current measuring device 20 is also connected to a control device 23, which stops the feed roller 6 when a foreign body is detected, so that the foreign body does not advance any further and does not cause any major damage. It is particularly advantageous if the control device 23 rotates the feed roller 6 backwards so far after it has been stopped that the foreign body comes out from under the elastic lip 16 and can be easily removed by the operating personnel.
  • an easily deformable seal 25 is arranged between the elastic lip 16 and the support strip 17 .
  • FIG. 2b shows the schematic side view of the feeding device 4 Figure 2a in operation, although the circuit is not shown for the sake of clarity.
  • a batt 2 is pinched between the resilient lip 16 and the feed roller 6 .
  • the elastic lip 16 is slightly deformed, but does not yet make contact with the contact surface 21.
  • the seal 25 is slightly compressed.
  • Figure 2c shows the schematic side view of the feeding device 4 Figure 2b , but this time with a hard foreign body 26 in the fiber mat 2.
  • This hard foreign body 26 presses the elastic lip 16 in the direction of the support bar 17 until the elastic lip 16 touches the contact surface 21 of the support bar 17.
  • the fact that the elastic lip 16 is now supported on the support strip 17 prevents further deformation of the elastic lip 16--in particular into the non-elastic area.
  • the seal 25 is deformed to such an extent that it does not impede the contact between the elastic lip 16 and the contact surface 21 .
  • the contact of the elastic lip 16 with the contact surface 21 closes the electrical circuit and the foreign body is thus detected.
  • an alarm is triggered and the control device stops the feed roller 6 and turns it back so far that the foreign body 26 comes out from under the elastic lip 16 .
  • the contact between the elastic lip 16 and the contact surface 21 is detected by a piezoelectric element 27 .
  • the piezoelectric element 27 is arranged on the contact surface 21 of the support strip 17, but it can also be arranged on the elastic lip 16.
  • pressure is exerted on the piezoelectric element 27, which leads to an electrical voltage between two electrodes of the piezoelectric element 27. This electrical voltage is measured and the contact is thus detected.
  • the feed trough 5 is shown without a spacer strip, which is optimal for particularly large fiber lengths.
  • the spacer bar 15 is designed as an adjustable linkage 28. It can thus be adjusted to different fiber lengths without complex conversion work.
  • the contact surface 21 is arranged on an electrically insulating holder 29 . This is no separate isolation of the elastic lip 16 required. When there is contact between the elastic lip 16 and the contact surface 21, an electric circuit is again closed and a foreign body is detected via an ammeter.
  • FIG. 5 a schematic front view of a feeding trough 5.
  • the elastic lip 16 is divided into four segments 16.1, 16.2, 16.3 and 16.4. A different number of segments is of course also possible. The individual segments are shorter than a single elastic lip 16 and can thus be better adjusted across their width.
  • the individual segments of resilient lip 16 are also electrically isolated from one another.
  • an insulation layer 30 is applied in the area in which they adjoin one another, only one of which has been provided with a reference number for the sake of clarity.
  • the individual segments are each connected to the voltage source via a current measuring device. In the case of a foreign body in the fiber mat, it can be recognized in which segment this foreign body is located. This is preferably displayed to the operating personnel so that the operating personnel can immediately search for the foreign body in the correct segment and then remove it.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (13)

  1. Auge d'alimentation (5) pour dispositif d'alimentation (4) sur une machine de préparation à la filature comportant un corps de base (13) et au moins une lèvre élastique (16) s'étendant le long d'une largeur de travail de l'auge d'alimentation (5), caractérisée en ce que l'auge d'alimentation (5) présente une surface de contact (21) et des moyens sont prévus pour détecter un contact (18, 19, 20; 27) entre la lèvre élastique (16) et la surface de contact (21).
  2. Auge d'alimentation (5) selon la revendication précédente, caractérisée en ce que les moyens de détection d'un contact (18, 19, 20; 27) comprennent une isolation électrique (18) entre la lèvre élastique (16) et la surface de contact (21) ainsi qu'une source de tension électrique (19), la source de tension électrique (19) appliquant une tension entre la lèvre élastique (16) et la surface de contact (21) et le contact entre la lèvre élastique (16) et la surface de contact (21) étant détecté en fermant le circuit.
  3. Auge d'alimentation (5) selon la revendication 2, caractérisée en ce que la tension appliquée par la source de tension électrique (19) entre la lèvre élastique (16) et la surface de contact (21) se situe entre 1,5 V et 32 V, de préférence entre 12 V et 28 V.
  4. Auge d'alimentation (5) selon la revendication 1, caractérisée en ce que les moyens de détection d'un contact (18, 19, 20; 27) présentent un élément piézoélectrique (27), l'élément piézoélectrique (27) étant fixé à la lèvre élastique (16) et/ou à la surface de contact (21).
  5. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce qu'un joint d'étanchéité (25) est disposé entre la lèvre élastique (16) et la surface de contact (21).
  6. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce qu'une barre d'écartement (15), de préférence interchangeable et/ou réglable, est disposée entre le corps de base (13) et la lèvre élastique (16).
  7. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce que la lèvre élastique (16) est constituée d'acier, en particulier d'acier chromé, et une épaisseur de paroi de la lèvre élastique (16) à son extrémité avant se situe de préférence entre 1,0 mm et 4,0 mm, de manière particulièrement préférée entre 1,5 mm et 2 mm.
  8. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce que l'auge d'alimentation (5) présente une barre de support (17) et la surface de contact (21) est associée à la barre de support (17), la barre de support (17) étant constituée en particulier d'aluminium.
  9. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce que l'auge d'alimentation (5) est divisée en au moins deux segments (16.1 - 16.4) le long de sa largeur de travail et une lèvre élastique (16) est associée à chaque segment (16.1 - 16.4).
  10. Auge d'alimentation (5) selon la revendication 9, caractérisée en ce qu'un élément piézoélectrique (27) est associé à chaque segment (16.1 - 16.4) ou les lèvres élastiques (16) associées aux segments (16.1 - 16.4) individuels sont électriquement isolées les unes des autres et associées à des circuits séparés.
  11. Auge d'alimentation (5) selon l'une des revendications précédentes, caractérisée en ce que l'auge d'alimentation (5) comprend une alarme acoustique et/ou optique (22) qui se déclenche lorsqu'un contact s'effectue entre la lèvre élastique (16) et la surface de contact (21).
  12. Dispositif d'alimentation permettant d'alimenter en flocons de fibres une machine de préparation à la filature, comportant un rouleau d'alimentation (6) et une auge d'alimentation (5) selon l'une des revendications précédentes.
  13. Dispositif d'alimentation selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'alimentation (4) comprend un système de commande (23) qui, lors d'un contact entre la lèvre élastique (16) et la surface de contact (21), interrompt l'alimentation en flocons de fibres, arrête le rouleau d'alimentation (6) et fait de préférence ensuite tourner le rouleau d'alimentation (6) d'un angle prédéfini ou pouvant être prédéfini.
EP18717129.3A 2017-04-13 2018-03-27 Auge d'alimentation et dispositif d'alimentation pourvu d'une auge d'alimentation Active EP3610060B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00506/17A CH713691A1 (de) 2017-04-13 2017-04-13 Speisemulde und Speisevorrichtung mit einer Speisemulde.
PCT/IB2018/052082 WO2018189608A1 (fr) 2017-04-13 2018-03-27 Auge d'alimentation et dispositif d'alimentation pourvu d'une auge d'alimentation

Publications (2)

Publication Number Publication Date
EP3610060A1 EP3610060A1 (fr) 2020-02-19
EP3610060B1 true EP3610060B1 (fr) 2022-05-04

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EP18717129.3A Active EP3610060B1 (fr) 2017-04-13 2018-03-27 Auge d'alimentation et dispositif d'alimentation pourvu d'une auge d'alimentation

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EP (1) EP3610060B1 (fr)
CN (1) CN110494601B (fr)
CH (1) CH713691A1 (fr)
WO (1) WO2018189608A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1411766A (fr) * 1964-07-28 1965-09-24 Cintas Rigidas Textiles Dispositif de contrôle des mèches et nappes dans les machines de filature
DE2440223A1 (de) * 1974-08-22 1976-03-04 Fritz Stahlecker Vorrichtung zum zufuehren eines faserbandes fuer offenend-spinnaggregate
CH623361A5 (fr) * 1977-07-18 1981-05-29 Rieter Ag Maschf
DE3912115A1 (de) * 1989-04-13 1990-10-18 Hollingsworth Gmbh Reinigungsvorrichtung fuer textilfasern
IT1236911B (it) * 1989-12-21 1993-04-26 Marzoli & C Spa Procedimento e dispositivo di alimentazione di materiale in fibre in una macchina di preparazione alla filatura, in particolare un apritoio
DE59811509D1 (de) * 1997-12-23 2004-07-08 Rieter Ag Maschf Elastische Speisemulde
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
IT1319668B1 (it) * 2000-11-17 2003-10-23 Marzoli Spa Carda a cappelli con alimentazione plurima di fibre in materassino.
DE10118067A1 (de) * 2001-04-11 2002-10-17 Truetzschler Gmbh & Co Kg Vorrichtung an einer Krempel oder Karde zur Vergleichmäßigung des Faserflors oder -bandes
DE10132711A1 (de) * 2001-07-05 2003-01-16 Truetzschler Gmbh & Co Kg Vorrichtung an einem Reiniger, einer Karde o. dgl. zum Reinigen und Öffnen von Textilmaterial, insbesonder Baumwolle
CN2673890Y (zh) * 2003-12-02 2005-01-26 欧阳俊青 具有压力传感器的给棉板
DE102011103840A1 (de) * 2011-06-01 2012-12-06 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Spinnereivorbereitungsmaschine, z.B. Faserflockenspeiser, Karde, Reiniger o. dgl. zum Zu- und/oder Abfördern von Fasermaterial
CN202247068U (zh) * 2011-07-05 2012-05-30 彭敏娜 一种新型开松机
CN105951221B (zh) * 2016-07-13 2018-07-17 卓郎（常州）纺织机械有限公司 一种梳棉机分段式弹性给棉板及其制作方法

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EP3610060A1 (fr) 2020-02-19
CN110494601B (zh) 2022-06-07
WO2018189608A1 (fr) 2018-10-18
CN110494601A (zh) 2019-11-22
CH713691A1 (de) 2018-10-15

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