EP3665318B1 - Carde - Google Patents

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Publication number
EP3665318B1
EP3665318B1 EP18737593.6A EP18737593A EP3665318B1 EP 3665318 B1 EP3665318 B1 EP 3665318B1 EP 18737593 A EP18737593 A EP 18737593A EP 3665318 B1 EP3665318 B1 EP 3665318B1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
doffer
carding machine
machine according
fibre web
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
EP18737593.6A
Other languages
German (de)
English (en)
Other versions
EP3665318A1 (fr
Inventor
Armin Leder
Gerd Pferdmenges
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.)
Truetzschler Group SE
Original Assignee
Truetzschler Group SE
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 Truetzschler Group SE filed Critical Truetzschler Group SE
Publication of EP3665318A1 publication Critical patent/EP3665318A1/fr
Application granted granted Critical
Publication of EP3665318B1 publication Critical patent/EP3665318B1/fr
Active 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
    • 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
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/465—Doffing arrangements for removing fibres using, or cooperating with, pneumatic means

Definitions

  • the invention relates to a card with an inlet side for fiber tufts, which are fed to a rotating drum by means of rollers and are broken up, aligned and cleaned down to the individual fibers between fixed carding elements and rotating flat bars and the drum, and the resulting fiber web from the drum to a doffer is passed, which is followed by at least one withdrawal unit for further processing or filing of the fibrous web.
  • a card according to this prior art is in DE10023011A1 described.
  • the object of the invention is the further development of a card on the outlet side for improved removal of the fibrous web.
  • the card comprises an inlet side for fiber tufts, which are fed to a rotating drum by means of rollers, with the fiber tufts being broken up, aligned and cleaned down to the individual fibers between fixed carding elements and rotating flat bars and the drum, and the resulting fiber web is transferred from the drum to a customer, which is followed by at least one take-off unit for further processing or depositing of the fibrous web.
  • the invention is characterized in that the take-off unit is designed as at least one conveyor belt that removes the fibrous web directly from the customer, with the transfer of the fibrous web from the customer to the at least one conveyor belt being supported by suction.
  • the invention is based on the finding that the fiber web is distorted at least once less than in the prior art by removing the fiber web directly from the customer by at least one conveyor belt. Because the number of transfer points is reduced, the take-off speed can be increased to up to 600 m/min.
  • the omission of the doctor and squeegee rollers shortens the installation space of the card and makes it less susceptible to faults, since the fiber material often accumulates in the area of the doctor and squeegee rollers, which leads to production disruptions.
  • the support of the transfer of the fibrous web from the collector to the conveyor belt by means of a vacuum ensures that all fibers are almost completely transferred.
  • the suction can be generated by applying a negative pressure or by an air flow, the resultant force of which supports the detachment of the fibrous web from the customer or keeps the fibrous web or the resulting sliver on the conveyor belt.
  • the at least one conveyor belt is arranged such that it can be driven transversely to the direction of rotation of the doffer.
  • the fibrous web can be drawn off laterally or transversely to the working direction of the card, or alternatively in the working direction of the card when using two conveyor belts that are operated in opposite directions. This is associated in particular with a reduction in the installation space of the card.
  • the at least one conveyor belt has a perforation.
  • the suction thus acts directly on the fibrous web, which is thus held flat on the conveyor belt. Since the fibrous web has to be partially pulled or lifted out of the curved teeth of the collector when it is transferred from the collector to the conveyor belt, the induced draft supports the transfer of the fiber batt.
  • the at least one conveyor belt is designed as an endless circulating conveyor belt, the load strand of which is at a distance of 0.5 to 5 mm, preferably 0.5 to 2 mm, from the collector at the narrowest point, over at least the entire working width of the Extends customer and compresses the batt into a sliver. It has been found that the adhesion of the conveyor belt to the fibrous web works well because of this small distance between the conveyor belt and the doffer, but on the other hand the suction also works particularly efficiently.
  • At least one suction device for generating the suction is preferably arranged within the at least one conveyor belt.
  • the at least one suction opening of the suction is aligned with the load strand.
  • Active suction inside the conveyor belt, which is directed towards the load strand, increases the air flow with which the fiber batt is transferred from the doffer to the conveyor belt.
  • a negative pressure of between 0.05 and 0.3 bar is preferably generated.
  • the suction can thus be coupled to the air duct system of the card, so that there is no need for a separate fan.
  • the conveyor belt extends at least over the entire working width of the doffer, so that the fibrous web is removed laterally from the doffer. This results in a very short design for the card, since all other elements for taking over the sliver can also be arranged laterally.
  • the fibrous web is removed from the center by two conveyor belts in the working direction.
  • the previous machine configuration with an integrated drafting system and subsequent can coiler can thus be retained without forgoing the advantage of the reduced overall length.
  • the clearer roller is arranged behind the conveyor belt in the direction of rotation of the doffer, so that the fibrous web is already in contact with the conveyor belt and the detachment by the air flow generated by the clearer roller facilitates the transfer.
  • the use of a flow guide element and a dynamic pressure box generate or intensify the suction with which the fibrous web is pulled out of the doffer clothing.
  • the flow control element and the dynamic pressure box form a withdrawal gap through which the fibrous web is conveyed from the doffer to the conveyor belt.
  • the suction can be increased at least for starting up the card with a combination of generated overpressure and generated negative pressure on the dynamic pressure box or on the flow guide element.
  • the flow control element and the dynamic pressure box are arranged between the doffer and the conveyor belt.
  • they can also be arranged above and below a preferably curved conveyor belt and increase its area upwards and downwards over the entire working width.
  • the immediate transfer of the batt from the doffer to the conveyor eliminates the interposition of rollers, powered or non-powered.
  • Means for directing and enhancing the flow of air between the doffer and the conveyor belt are within the scope of the invention.
  • FIG. 1 shows a card according to the prior art with a feed roller 1, a feed table 2, with licker-in 3a, 3b, 3c, drum 4, doffer 5, doctor roller 6, squeeze rollers 7, 8, a cross belt take-off 9, pile funnel 10, take-off rollers 11 (not shown) and 12, and a revolving flat 13 with slowly revolving flat bars 14.
  • the directions of rotation of the rollers of the card are indicated by curved arrows.
  • the direction of rotation of the drum is indicated by the arrow 4b.
  • A is the working direction (fiber material flow direction).
  • the squeezing rollers 7 and 8 are followed in the working direction A by the cross-band take-off 9 .
  • Fiber tufts are fed to the card via the feed roller 1 and the individual fibers are separated and aligned between the drum 4 and the revolving flats 13 .
  • the resulting fiber batt is drawn off the drum 4 by the doffer 5 and passed on via the stripping and squeezing rollers 6, 7, 8.
  • the drum 4, the pickup 5 and the following rollers 6, 7, 8 all have the width of the drum 4, which can be between 1 and 1.5 m.
  • the fibrous web emerging from the nip of the squeeze rollers 7, 8 thus also has a width of 1 to 1.5 m. This thin, but wide fibrous web then hits the cross belt deduction 9, which compresses the fibrous web 19 into a sliver 17 and directs it to the following web funnel 10.
  • the device according to the invention for removing the fibrous web 19 from the buyer 5 has, in a first embodiment, a single endless conveyor belt 20 which has a perforation.
  • the conveyor belt 20 extends at least over the entire working width of the customer 5.
  • the conveyor belt 20 is tensioned, guided and driven by two deflection rollers 20.1, 20.2, at least one deflection roller 20.1 or 20.2 having a drive.
  • a flat outside of the conveyor belt 20, which is designed as a load strand, is arranged very close to the clothing of the customer 5 and is located at a small distance of about 0.5 to 5 mm, preferably at a distance of 0.5 to 2 mm approximately in the middle at the level of the central axis of the customer 5.
  • the moving section of the conveyor belt 20, which is directed away from the customer is referred to as the slack side.
  • the conveyor belt 20 can preferably also be arranged somewhat below the central axis of the collector 5 .
  • the collector 5 rotates counterclockwise with the fibrous web 19 and transports the fibrous web 19 onto the conveyor belt 20 .
  • the teeth of the set of the doffer 5 are inclined clockwise and can free themselves from the doffer 5 during the transfer of the batt 19 from the doffer 5 onto the conveyor belt 20 from the batt 19 . Due to the direction of movement of the conveyor belt 20 transverse to the direction of rotation of the doffer 5, which is counterclockwise in this embodiment, the conveyor belt 20 can remove the fibrous web 19 from the doffer 5.
  • the fibrous web 19 is thereby compressed into a sliver 17 and fed via the conveyor belt 20 and, for example, two draw-off rollers 11, 12 to further processing.
  • the conveyor belt 20 is aspirated by air from the inside by means of a suction device 30.
  • the suction device 30 can also extend in one piece along the working width of the collector 5 or can be made in several parts.
  • the suction opening 30a is oriented toward the doffer 5 and the load strand of the conveyor belt 20, so that a permanent air flow 33 forms above and below the doffer 5 through the perforated conveyor belt 20, which keeps the fibrous web 19 on the conveyor belt 20.
  • the air flow 33 is discharged below the suction device 30 as exhaust air 34 by means of an exhaust air duct 31, which is generated by the negative pressure of a fan, not shown, which can be connected to the suction system of the card.
  • the Suction 30 only on one side a suction opening 30a, so that 20 air is not sucked through the slack side of the conveyor belt.
  • the negative pressure generated is in the range of 0.05 to 0.3 bar, which corresponds to an absolute pressure of 0.95 to 0.7 bar.
  • the conveyor belt 20 and the suction device 30 can be matched to one another in such a way that the conveyor belt 20 rests on the suction device in the region of the suction opening 30a and is guided in a sliding manner. This ensures a small, constant distance between the load side and the collector 5, so that the load side does not flutter but is guided flat.
  • a cleaning roller 32 can be arranged above the conveyor belt 20, which also rotates counterclockwise and thus rotates in the opposite direction to the customer 5 at the point of contact.
  • the cleaning roller 32 also extends over the entire working width of the customer 5. Due to the direction of rotation of the cleaning roller 32, the detachment of the fibrous web 19 from the customer 5 is supported and at the same time the air flow 33 on the upper side of the conveyor belt 20 is reinforced.
  • the cleaner roller 32 is in contact with the doffer 5 and is always arranged on the side of the conveyor belt 20 on which the batt 19 has already been removed. According to the embodiment of figure 3 ie in the direction of rotation of the customer 5 after the conveyor belt 20, since the fibrous web 19 has already been removed from the customer 5 by the conveyor belt 20.
  • each conveyor belt 20, 21 is assigned a separate suction device 30 which sucks through the perforated conveyor belt 20, 21.
  • Downstream, take-off rollers 11, 12 (not shown here) or another take-off device such as a funnel can also be arranged, with which the fiber sliver 17 is compressed and conveyed to a can coiler (not shown).
  • the improvement in the transfer of the fibrous web 19 to the conveyor belt is achieved in that at least a smaller upper part of the conveyor belt 20 is concave and at least partially adapts to the curvature of the doffer 5 .
  • the fibrous web 19 would then run into a narrowing gap between the doffer 5 and the conveyor belt 20 and would then be transferred laterally from the doffer 5 onto the conveyor belt 20 through an approximately constant gap.
  • this arrangement can optimize the pressure curve of the air flow and, on the other hand, reduce the energy consumption of the suction because less false air is sucked in.
  • a flow guide element 36 in combination with a dynamic pressure box 37 ensures a narrowing gap towards the collector 5, in which the entrained air flow 33 accumulates.
  • the flow guide element 36 and the dynamic pressure box 37 extend over the entire working width of the doffer 5 and form a withdrawal gap 38 through which the fibrous web 19 runs onto the conveyor belt 20 .
  • the dynamic pressure box 37 ensures that the air flow that is entrained by the rotating doffer 5 and the transported fibrous web accumulates.
  • the dynamic pressure box 37 can have openings on the side facing the collector 5 through which compressed air is pressed. This generates an air flow which ensures that the fibrous web 19 is detached from the clothing. The generation of compressed air for starting the Card are used when the first batt 19 is on the buyer.
  • the air flow is directed into the draw-off gap 38 and the compressed air in the dynamic pressure box 37 can be switched off when the fibrous web 19 runs through the draw-off gap 38 and is transported by the conveyor belt 20 .
  • the inclination of the draw-off gap 38 essentially corresponds to the inclination of the clothing used on the doffer 5 in order to detach the fibrous web 19 from the clothing via the air flow.
  • the draw-off gap 38 is rounded in a horizontal orientation.
  • the lower flow guide element 36 forms a narrowing gap with the collector 5, in which the entrained air flow is accumulated at the dynamic pressure box 37 and is discharged through the extraction gap 38. Suction occurs in the area of the withdrawal gap 38, which detaches the fibrous web 19 from the clothing of the doffer 5 and feeds it onto the conveyor belt 20.
  • the flow guide element 36 can be subjected to a negative pressure permanently or only temporarily in order to increase the suction, in particular when the card is started up.
  • the negative pressure generated is in the range of 0.05 to 0.3 bar, which corresponds to an absolute pressure of 0.95 to 0.7 bar, and can be taken from the compressed air or suction system of the card.
  • the side of the flow guide element 36 facing the surface of the collector is also provided with openings or perforations through which the air flow is discharged.
  • the flow guide element 36 and the dynamic pressure box 37 are shown as solid components for reasons of illustration. However, these can be designed in thickness as very thin hollow profiles that require only a few millimeters of space between the customer 5 and the conveyor belt 20 .
  • the conveyor belt 20 can according to the embodiment of Figures 3 and 4 be made in one piece or in two pieces. It can be vacuumed, but does not have to be vacuumed. A guided air flow with which the fibrous web 19 is held on the conveyor belt 20 is important.
  • the conveyor belt 20 can have a perforation and within the conveyor belt 20 have a suction opening 30a for exhaust air guidance and support of the conveyor belt 20.
  • the advantage of the invention lies in the fact that several mechanical components that are prone to failure, such as stripping rollers and squeezing rollers, can be dispensed with and the card can therefore be made shorter.
  • an essential aspect is that with the invention the sliver is warped less than with the prior art. The card sliver can thus be produced with a higher quality.
  • Another advantage is the higher take-off speed, which can be 20, 21 to 600 m/min with the conveyor belt.

Landscapes

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

Claims (13)

  1. Carde avec un côté d'entrée pour des flocons de fibres qui sont amenés au moyen de rouleaux à un tambour rotatif (4) et qui sont ouverts jusqu'à la fibre individuelle, orientés et nettoyés entre des éléments de cardage fixes et des barres de chapeaux tournants (14) et le tambour (4), et la nappe de fibres (19) qui en résulte est transférée du tambour (4) à un peigneur (5) en aval duquel est agencé au moins un groupe d'extraction pour le traitement ultérieur ou le dépôt de la nappe de fibres (19), le groupe d'extraction étant réalisé sous forme d'au moins une bande de transport (20, 21) qui évacue la nappe de fibres (19) directement du peigneur (5), le transfert de la nappe de fibres (19) du peigneur (5) à l'au moins une bande de transport (20, 21) étant assisté par un tirage par aspiration, caractérisée en ce que l'au moins une bande de transport (20, 21) est agencée de manière à pouvoir être entraînée transversalement à la direction de rotation du peigneur (5) et au moins une petite partie supérieure de la bande de transport (20) est réalisée sous forme concave et s'adapte au moins partiellement à la courbure du peigneur (5).
  2. Carde selon la revendication 1, caractérisée en ce que l'au moins une bande de transport (20, 21) présente une perforation.
  3. Carde selon l'une quelconque des revendications 1 à 2, caractérisée en ce que l'au moins une bande de transport (20, 21) est réalisée sous forme de bande de transport (20) sans fin tournante dont le brin sous charge s'étend à une distance de 0,5 à 5 mm, de préférence de 0,5 à 2 mm, sur au moins toute la largeur de travail du peigneur (5) et comprime la nappe de fibres (19) en une bande de fibres (17).
  4. Carde selon l'une quelconque des revendications précédentes, caractérisée en ce qu'à l'intérieur de l'au moins une bande de transport (20, 21) est agencée au moins une aspiration (30), dont l'au moins une ouverture d'aspiration (30a) est orientée vers le brin sous charge.
  5. Carde selon la revendication 4, caractérisée en ce qu'une dépression est générée au moyen de l'au moins une aspiration (30).
  6. Carde selon la revendication 5, caractérisée en ce que la dépression générée est comprise entre 0,05 et 0,3 bar.
  7. Carde selon l'une quelconque des revendications précédentes, caractérisée en ce que la bande de transport (20) s'étend au moins sur toute la largeur de travail du peigneur (5) et évacue la nappe de fibres (19) latéralement du peigneur (5).
  8. Carde selon l'une quelconque des revendications 1 à 6 précédentes, caractérisée en ce que deux bandes de transport (20, 21) évacuent la nappe de fibres (19) au centre du peigneur (5).
  9. Carde selon l'une quelconque des revendications précédentes, caractérisée en ce que d'autres dispositifs d'extraction, tels que des rouleaux d'extraction (11, 12) ou un entonnoir, sont agencés en aval de l'au moins une bande de transport (20, 21).
  10. Carde selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins un rouleau de nettoyage (32) est agencé en contact avec le peigneur (5) dans la zone de l'au moins une bande de transport (20, 21), ledit rouleau de nettoyage tournant en sens inverse du peigneur (5).
  11. Carde selon la revendication 10, caractérisée en ce que l'au moins un rouleau de nettoyage (32) est agencé derrière la bande de transport (20, 21) dans la direction de rotation du peigneur (5).
  12. Carde selon l'une quelconque des revendications 10 à 11, caractérisée en ce que l'au moins un rouleau de nettoyage (32) s'étend sur toute la largeur de travail du peigneur (5).
  13. Carde selon la revendication 1, caractérisée en ce que le tirage par aspiration est généré ou renforcé par un élément de guidage de courant (36) et un caisson de pression dynamique (37), l'élément de guidage de courant (36) et le caisson de pression dynamique (37) formant une fente d'extraction (38) à travers laquelle la nappe de fibres (19) est transportée du peigneur (5) à la bande de transport (20).
EP18737593.6A 2017-08-09 2018-07-04 Carde Active EP3665318B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017118111.3A DE102017118111A1 (de) 2017-08-09 2017-08-09 Karde
PCT/EP2018/068056 WO2019029914A1 (fr) 2017-08-09 2018-07-04 Cardeuse

Publications (2)

Publication Number Publication Date
EP3665318A1 EP3665318A1 (fr) 2020-06-17
EP3665318B1 true EP3665318B1 (fr) 2023-01-18

Family

ID=62837922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18737593.6A Active EP3665318B1 (fr) 2017-08-09 2018-07-04 Carde

Country Status (4)

Country Link
EP (1) EP3665318B1 (fr)
CN (1) CN110621818B (fr)
DE (1) DE102017118111A1 (fr)
WO (1) WO2019029914A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021114783A1 (de) 2021-06-09 2022-12-15 Trützschler GmbH & Co Kommanditgesellschaft Karde

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1208264A (en) * 1966-10-13 1970-10-14 Tmm Research Ltd A method of forming sliver from textile fibres and machines for this purpose
US3787930A (en) * 1971-08-12 1974-01-29 Kendall & Co Process for randomizing card webs
US4274178A (en) * 1979-03-28 1981-06-23 Kabushiki Kaisha Kyowa Kikai Seisakusho Device for stripping a fibrous web from a doffer in a carding machine
DE4025854A1 (de) * 1990-05-26 1992-02-20 Truetzschler & Co Vorrichtung zum automatischen anspinnen eines faserflors zu einem faserband, z.b. bei einer karde
DE4017064A1 (de) * 1989-08-07 1991-02-14 Truetzschler & Co Verfahren und vorrichtung zum automatischen anspinnen eines faserflors zu einem faserband, z. b. bei einer karde
DE9306116U1 (de) * 1993-04-22 1993-11-04 China Textile T & R Institute, Taipeh/T'ai-pei Elektrostatische Auflösungs- und Kurzfaser-Ausscheidevorrichtung für Karden
JPH07243133A (ja) * 1994-03-07 1995-09-19 Howa Mach Ltd 紡機における繊維束搬送装置
FR2725216B1 (fr) * 1994-09-30 1996-12-20 Thibeau Et Cie A Dispositif pour detacher et transporter a grande vitesse un voile fibreux en sortie de carde
JPH09310232A (ja) * 1996-05-20 1997-12-02 Howa Mach Ltd ウェブ集束方法及び装置
DE10023011B4 (de) 2000-05-11 2018-10-11 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Karde zur Verarbeitung von Fasermaterial, insbesondere Baumwolle, Chemiefasern u. dgl.
FR2830263B1 (fr) * 2001-10-03 2004-08-06 Thibeau Procede et installation pour la production d'un non-tisse condense, et dispositif de condensation d'un non-tisse
ES2286577T3 (es) * 2004-04-22 2007-12-01 Asselin-Thibeau Maquina de cardar con un organo de transferencia rotativo aspirante.
CH705307A1 (de) * 2011-07-25 2013-01-31 Rieter Ag Maschf Spinnmaschine mit einer Verdichtungsvorrichtung.
FR3018284B1 (fr) * 2014-03-07 2016-07-08 Andritz Perfojet Sas Installation de carde et procede de demarrage d'une telle installation

Also Published As

Publication number Publication date
DE102017118111A1 (de) 2019-02-14
CN110621818A (zh) 2019-12-27
CN110621818B (zh) 2022-09-27
EP3665318A1 (fr) 2020-06-17
WO2019029914A1 (fr) 2019-02-14

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