EP3543385A1 - Unité formatrice de bande d'une carde - Google Patents

Unité formatrice de bande d'une carde Download PDF

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Publication number
EP3543385A1
EP3543385A1 EP19160975.9A EP19160975A EP3543385A1 EP 3543385 A1 EP3543385 A1 EP 3543385A1 EP 19160975 A EP19160975 A EP 19160975A EP 3543385 A1 EP3543385 A1 EP 3543385A1
Authority
EP
European Patent Office
Prior art keywords
nonwoven
hopper
funnel
forming unit
pressure 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.)
Granted
Application number
EP19160975.9A
Other languages
German (de)
English (en)
Other versions
EP3543385B1 (fr
Inventor
Tonny Raaijmakers
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
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3543385A1 publication Critical patent/EP3543385A1/fr
Application granted granted Critical
Publication of EP3543385B1 publication Critical patent/EP3543385B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • D01G15/50—Stripping-rollers or like devices
    • 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
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides

Definitions

  • the present invention relates to a device for guiding a nonwoven tape in a tape forming unit of a carding machine.
  • the carding machine produces a card sliver from fed-in fiber material, which is subsequently processed into a yarn.
  • a card is usually associated with a hopper which is supplied by a conveyor system with fibers from a blowroom.
  • the fibers are cleaned by the card and parallelized.
  • the fibers are guided over a card drum.
  • the fibers are removed by a pickup in the form of a nonwoven fabric and fed to a band forming unit.
  • the customer consists essentially of a take-off roll, a transfer roller and a pair of output rollers.
  • the fiber fleece extends over the entire working width of the card.
  • the nonwoven fabric is brought together into a card sliver.
  • the nonwoven fabric After leaving the pair of delivery rollers, the nonwoven fabric strikes a fiber-fleece guide element which effects a conveyance of the fiber fleece in the axial direction of the pair of delivery rollers. As a result, the fibers of the nonwoven fabric are brought together to form a nonwoven tape. In the case of cards with a larger working width, for example, two counter-rotating transverse bands working together are used as the non-woven guiding element. Subsequently, the nonwoven tape passes through various guides and funnels to a pair of pressure rollers which causes the final shaping of the card sliver.
  • a device for guiding a nonwoven tape in a band forming unit of a card after the EP 3 153 607 A1 known.
  • the fleece coming from the customer is brought together by a nonwoven guiding element to form a fleece band and fed to a Vorverêtrring.
  • the nonwoven tape is then fed to a first and a subsequent second insertion device, wherein the second insertion device is provided with a compressed air supply.
  • the first insertion device protrudes into the second insertion device. With the compressed air, an air flow with a swirl is generated in the space between the first insertion device and the second insertion device such that in the Result in the first insertion a negative pressure arises.
  • This negative pressure pulls the nonwoven tape through the first insertion device.
  • the nonwoven strip passes to a squeezing roller pair which form the nonwoven strip into a card sliver.
  • the disadvantage here is the one-stage compression of the nonwoven tape. This leads at high belt speeds to damming the nonwoven tape in front of the final funnel. In this case, air is pressed out of the nonwoven strip in one go, which results in splitting off of fibers or parts of the nonwoven strip.
  • the air contained in the nonwoven web in front of the first insertion device causes the nonwoven web to expand on the one hand in places without tight guidance (for example, between the precompressor ring and the first introduction device) and, on the other hand, a high force is necessary around the nonwoven web without active conveyance through a tapered end To suck guide such as the Vorverêtrring or the first insertion device.
  • a tapered end To suck guide such as the Vorverêtrring or the first insertion device.
  • the air contained in the nonwoven tape must either be able to escape or be compressed accordingly, which is not guaranteed by the disclosed design of the nonwoven tape guide.
  • the EP 0 298 507 A2 a device for automatically merging a textile nonwoven fabric into a sliver.
  • the nonwoven fabric is combined via a funnel trough into a nonwoven belt and transferred into a funnel-shaped transport channel.
  • an annular gap nozzle is arranged, which generates a concentric flow in the transport direction.
  • the nonwoven strip passes into a mouthpiece channel at the outlet of which a further annular gap nozzle is attached.
  • the nonwoven web passes through another mouthpiece channel to a calender roll pair where it is formed into a sliver.
  • a tapering of the non-woven band during its threading should be achieved in the event of a restart of the device.
  • a disadvantage of the proposed banding unit is that when an impingement of the nonwoven ribbon on the calender rolls this accumulates at the terminal point of the calender rolls, which leads to blockages. Further, it is disadvantageous that the nonwoven ribbon is passed through a plurality of transport channels, annular gap nozzles and mouthpiece channels, since each transition from a channel piece to a next can lead to buildup, fiber accumulation and disturbance of the currents.
  • the DE 101 45 733 A1 also discloses a tape forming unit for forming a sliver in a card.
  • the fleece band is fed after leaving the transverse bands by a pile funnel a Kalanderwalzencru.
  • One of the two calender rolls is spring-mounted. Due to the selection of the spring and thus the determination of the spring constant, a force matched to the fiber material to be processed can be adjusted to the nonwoven belt at the nip point of the calender roller pair.
  • the possibility of a distance between the calender rolls is possible by the proposed device.
  • the disadvantage here is that a default setting of the distance between the calender rolls in startup operation does not prevent thawing of the fibers before the terminal point. At a high production rate, the fibers begin to accumulate before the nip point before they can be detected by the calender roll pair.
  • Object of the present invention is therefore to provide a device for guiding a nonwoven tape in a band forming unit of a card, which ensures a trouble-free guidance of the nonwoven ribbon and prevents damming respectively evasion of the nonwoven ribbon from the guide. Further, it is the object of the invention to simplify threading the nonwoven ribbon into the ribbon forming unit.
  • Proposed is a device for guiding a fleece band in a band forming unit of a carding machine with a guide hopper, with a double-walled hopper and with a pressure roller pair consisting of an upper pressure roller and a lower pressure roller, wherein a distance between the upper pressure roller and the lower pressure roller is adjustable.
  • the adjustment of the distance can be driven pneumatically or via a lever mechanism. This adjustment is helpful in a threading process.
  • the distance between the pressure rollers can be reset to the desired value, while the pressure rollers move to the already located between them fleece band.
  • the nonwoven web is guided in a threading process through the nip of the pressure rollers, without resisting, whereby there is no risk of damming the nonwoven tape.
  • an adjustment or regulation of the force with which the pressure rollers are pressed against each other can be provided. Due to the design of the end funnel as a double-walled cone can be dispensed with additional elements for conveying air such as annular gap nozzles. Likewise, the introduction of air through a double-walled hopper causes suction and transport of the non-woven belt without the flow of air being applied directly to the non-woven belt, as is the case with the delivery nozzle.
  • the guide funnel is arranged in front of the final funnel and the final funnel in front of the pair of pressure rollers.
  • the final funnel has a compressed air supply.
  • a funnel is provided between the guide funnel and the funnel. Due to the arrangement of the Vortrichters between the guide funnel and the end funnel, there is the possibility to provide a finer gradation of the taper of the individual funnels respectively guide elements.
  • the difference between the cross sections at the inlet and at the outlet of a guide element, for example, the Vortrichters or the guide funnel, can be made smaller.
  • the inlet cross-section of the final funnel can be made smaller, which must be done in the final funnel less compression of the nonwoven ribbon in his leadership to the pressure roller pair.
  • a part of the air contained in the nonwoven tape escape between the individual guide elements, which means that a lower compression in the subsequent guide element is necessary.
  • a disposal of the exiting air can be provided by an active suction in the region of the guide elements.
  • the funnel is provided with a compressed air supply and double-walled.
  • This results in the possibility to support the leadership of the nonwoven tape with an active promotion. This helps with a threading process at the beginning of production or resumption of interrupted production.
  • the fleece band is supported in its course by the guide elements using the compressed air.
  • the compressed air is fed into the cavity of the double-walled Vortrichters and placed in this cavity in the direction of movement of the nonwoven tape, where the compressed air exits through an annular gap in the conveying direction.
  • the fleece band is compressed by the outflowing compressed air and moved by the hopper against the end hopper and on the other hand arises in the hopper in suction, which sucks the fleece band from the upstream guide hopper.
  • a control of the compressed air connection of the Vortrichters is coupled with the adjustment of the distance between the upper pressure roller and the lower pressure roller.
  • Particularly preferred is also a coupling with the compressed air connection of the final funnel.
  • the compressed air supply to the funnel is opened in a starting operation.
  • the incoming nonwoven ribbon must be conveyed through the guide elements.
  • the active promotion of the pressure roller pair is missing until the time when the nonwoven tape actually reaches the pressure roller pair.
  • the compressed air supply to the funnel is opened for a certain duration, whereby the nonwoven ribbon is supported on its way to the pressure roller pair. The threading process is triggered by a manual command to the controller.
  • the pressure rollers are adjusted to a maximum distance during at least a first part of the time of the opening of the air supply to the funnel. As soon as the end of the fleece band through the funnel and the subsequent End funnel is promoted, this can happen unhindered due to the adjustment of the distance of the pressure roller pair. Only when the end of the nonwoven tape has left the pressure roller pair behind, the pressure rollers are moved together again and thus set the specific distance for production.
  • a tape forming unit for a card with a device for guiding a nonwoven tape as described above is proposed, wherein the tape forming unit is provided with two transverse bands for merging the nonwoven fabric.
  • the use of moving transverse bands has the advantage over static nonwoven guiding elements that there is no friction between the guiding element and the fibers to be moved.
  • a combination of wide non-woven fabrics in high-performance cards is fiber-friendly through the use of transverse bands.
  • fleece band guides are provided between the transverse bands.
  • the nonwoven ribbon guide as a further guide element, the nonwoven strip leaving the transverse strips is bounded on all sides and introduced into the guide funnel with a predetermined cross section.
  • a card with a band forming unit is proposed, wherein in the band forming unit two transverse bands and a device for guiding the nonwoven band are provided.
  • the fleece band is visually recognized before reaching the guide funnel and manually triggered according to the process according to which the opening of the compressed air supply to the funnel is made by the controller at this time.
  • FIG. 1 shows a carding machine 1 equipped with a hopper 2, a Medschachtaustrag 5 and a feed channel 3. Fiber flakes 4 arrive after they have passed through the various stages of a blowroom in the hopper 2. The fiber flakes 4 are through the Guschachtaustrag 5, comprising a feed roller 6 and an opening roller 7 and an air supply 8, passed to the feed channel 3. In Guschachtaustrag 5 an air supply 8 is provided for the support of the flock transfer to the feed channel 3 and to ensure a cotton compaction in front of a feed device 10 of the carding machine 1.
  • the air supply 8 blows air tangentially to the opening roller 7 along in the feed channel 3 and thereby compresses the fiber flakes into a cotton wool with a necessary for further processing in the carding 1 high cotton weight.
  • a feeding device 10 following the feeding channel 3 feeds the fiber flakes, now in the form of a homogeneous wadding template 11, to the licker-in module 12 of the carding machine 1.
  • the fiber flakes discharged from the feeder 10 from the wadding 11 are further opened by the lickerin contained in the licker-in module 12 and at the same time freed from a portion of the impurities contained therein.
  • the last licker-in roller of the licker-in module 12 finally passes the fibers to the card drum 13, which completely dissolves and parallelizes the fibers.
  • the carding drum 13 cooperates with the cover unit 14. After the fibers have in part carried out several revolutions on the card drum 13, they are removed from the card drum 13 by a take-off unit 15 in the form of a non-woven fabric 17 and fed to a ribbon-forming unit 16 by an output roller pair 9. By the band forming unit 16 formed by the card pulley 13 nonwoven fabric 17 is converted into a card sliver 19. The card sliver 19 is then placed in a jug for further transport (not shown).
  • FIG. 2 shows a schematic side view of a band forming unit 16 with an inventive device and FIG. 3 a schematic plan view in the direction X of the band forming unit 16 after the FIG. 2 ,
  • the fiber web 17 arriving in the belt formation unit 16 in the direction of movement 23 is detected by a pair of delivery rollers 9 and forwarded to paired transverse belts 20.
  • the transverse bands 20 with their opposite direction of movement 29 the nonwoven fabric 17 is summarized in the direction of the longitudinal axis of the output roller pair 9 to a nonwoven 18.
  • the nonwoven fabric 17 is guided transversely to its direction of movement 23 in the output roller pair 9 between the two transverse bands 20.
  • the transverse bands 20 can be provided on their surfaces with limiting profiles 22.
  • nonwoven ribbon guides 21 are shown by way of example.
  • the non-woven band guide 21 which define the space between the transverse bands 20 and the output roller pair 9 and the guide hopper 24 and are arranged above and below the boundary profiles 22, an improved guidance of the nonwoven ribbon 18 can be achieved.
  • due to the volume of the nonwoven ribbon 18 is a sufficient leadership of Nonwoven tape 18 by the transverse bands 20 possible, can be dispensed with the nonwoven ribbon 21.
  • the guide funnel 24 serves to reduce the nonwoven web 18 in its extent and pass it on to the funnel 25.
  • the funnel 25 is provided with a compressed air supply 30.
  • the funnel 25 is double-walled, so that the compressed air supplied in the funnel 25, seen in the direction of movement of the nonwoven ribbon 18, brought to the end of the Vortrichters 25 and distributed over its cross-section emerges. This creates in the funnel 25 a suction which supports the nonwoven band 18 in its movement.
  • the nonwoven web 18 passes into a final hopper 26 and in succession in a pair of pressure rollers consisting of an upper pressure roller 27 and a lower pressure roller 28.
  • the pressure roller pair By the pressure roller pair, the nonwoven tape 18 is formed into a card sliver 19. Another function of the pressure roller pair is to pull the nonwoven web 18 through the hoppers 24, 25 and 26.
  • the end hopper 26 is provided with a compressed air supply 31.
  • the end hopper 26 is double-walled, so that the supplied compressed air in the end hopper 26, seen in the direction of movement of the nonwoven web 18, brought to the end of the end hopper 26 and distributed over its cross-section emerges.
  • the air duct in the end hopper 26 is designed such that the air flowing through is provided with a swirl. This results in the funnel 25 on the one hand, a suction which supports the nonwoven web 18 in its movement and on the other hand is achieved by the twist that the nonwoven web 18 is slightly twisted and thus more compact.
  • the end hopper 26 can be extended as shown by a cylindrical extension between the upper and lower pressure rollers 27 and 28, so that the nonwoven belt 18 is guided as close to the clamping point of the pair of pressure rollers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP19160975.9A 2018-03-21 2019-03-06 Unité formatrice de bande d'une carde Active EP3543385B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00373/18A CH714817A1 (de) 2018-03-21 2018-03-21 Vorrichtung zur Führung eines Vliesbandes in einer Bandbildungseinheit einer Karde.

Publications (2)

Publication Number Publication Date
EP3543385A1 true EP3543385A1 (fr) 2019-09-25
EP3543385B1 EP3543385B1 (fr) 2021-05-12

Family

ID=65717863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19160975.9A Active EP3543385B1 (fr) 2018-03-21 2019-03-06 Unité formatrice de bande d'une carde

Country Status (3)

Country Link
EP (1) EP3543385B1 (fr)
CN (1) CN110295419B (fr)
CH (1) CH714817A1 (fr)

Cited By (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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327574C1 (de) * 1983-07-30 1984-11-29 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung an einer Karde zum Zusammenfassen eines aus einem Lieferwerk einer Karde austretenden Faserflors zu einem Faserband
EP0298507A2 (fr) * 1987-07-09 1989-01-11 Hollingsworth Gmbh Appareil pour le guidage automatique du voile de fibres en ruban
EP3138943A1 (fr) * 2015-09-04 2017-03-08 Trützschler GmbH & Co. KG Dispositif de déviation et de compression d'une bande de fibres sur une machine de préparation de filature
EP3153607A1 (fr) * 2015-10-08 2017-04-12 Trützschler GmbH & Co. KG Carde comprenant un dispositif de rattache

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155879A (en) * 1989-08-07 1992-10-20 Trutzschler Gmbh & Co. Kg Apparatus for automatically starting formation of sliver from a carded web
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
EP0736619B1 (fr) * 1995-04-07 1998-05-06 Rieter Ingolstadt Spinnereimaschinenbau AG Méthode et dispositif pour insérer du ruban devant la fente de pincement des disques de calandre
IT1281339B1 (it) * 1995-11-27 1998-02-18 Marzoli & C Spa Macchina tessile in cui la posizione del gruppo di stiro e' regolabile rispetto al doffer in modo da uniformare la qualita' del prodotto
DE10145733B4 (de) * 2000-10-19 2017-02-16 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Karde oder Krempel zur Bildung eines Faserverbandes
DE102005006273A1 (de) * 2004-04-21 2005-11-10 Trützschler GmbH & Co KG Vorrichtung zum Verfestigen eines förderbaren Faservlieses, z. B. aus Baumwolle, Chemiefasern o. dgl.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327574C1 (de) * 1983-07-30 1984-11-29 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung an einer Karde zum Zusammenfassen eines aus einem Lieferwerk einer Karde austretenden Faserflors zu einem Faserband
EP0298507A2 (fr) * 1987-07-09 1989-01-11 Hollingsworth Gmbh Appareil pour le guidage automatique du voile de fibres en ruban
EP3138943A1 (fr) * 2015-09-04 2017-03-08 Trützschler GmbH & Co. KG Dispositif de déviation et de compression d'une bande de fibres sur une machine de préparation de filature
EP3153607A1 (fr) * 2015-10-08 2017-04-12 Trützschler GmbH & Co. KG Carde comprenant un dispositif de rattache

Cited By (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

Also Published As

Publication number Publication date
CN110295419A (zh) 2019-10-01
CH714817A1 (de) 2019-09-30
EP3543385B1 (fr) 2021-05-12
CN110295419B (zh) 2022-08-30

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