EP4284970A1 - Peigneuse et procédé de fonctionnement d'une peigneuse - Google Patents

Peigneuse et procédé de fonctionnement d'une peigneuse

Info

Publication number
EP4284970A1
EP4284970A1 EP21798980.5A EP21798980A EP4284970A1 EP 4284970 A1 EP4284970 A1 EP 4284970A1 EP 21798980 A EP21798980 A EP 21798980A EP 4284970 A1 EP4284970 A1 EP 4284970A1
Authority
EP
European Patent Office
Prior art keywords
pair
combing
detaching rollers
rollers
detaching
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.)
Pending
Application number
EP21798980.5A
Other languages
German (de)
English (en)
Inventor
Michael Schulte
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 EP4284970A1 publication Critical patent/EP4284970A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus
    • D01G19/18—Roller, or roller and apron, devices, e.g. operating to draw-off fibres continuously
    • D01G19/20—Roller, or roller and apron, devices, e.g. operating to draw-off fibres continuously operating to draw-off fibres intermittently

Definitions

  • the invention relates to a combing machine and a method for operating a combing machine according to the preamble of the independent patent claims.
  • the fiber tuft combed out by the circular comb lies on this rear end section and is pulled together with it into the nip point of the detaching rollers, since the detaching rollers change their direction of rotation again.
  • the fiber tuft is torn off the batting lying in the nipper unit.
  • the rear end of the torn off tuft is pulled through the top comb.
  • the detaching rollers carry out a pilger stepping motion, whereby when they rotate back they return an end piece of the fiber tuft that was drawn off during the previous comb game. The beginning of the fiber tuft is placed on this end piece and soldered together by the pressure of the two detaching rollers after a reversal of the direction of rotation.
  • the detaching rollers not only have to change their direction of movement twice with each comb play, they also have to turn a shorter distance on the reverse than on the forward.
  • a cam disk, cam disk or cam groove is often used, which is firmly coupled to the movement of the tongs via a gear.
  • the invention relates to a combing machine with several combing heads, wherein at each combing head at least one lap sliver is unwound from a lap roll and fed to a feed cylinder and a gripper unit, the noils are combed out of the lap sliver and sucked off by means of top and round combs, and the resulting fiber web by means of a Funnel is formed into a sliver, which is stretched with the other slivers of the other combing heads into a single sliver.
  • the invention includes the technical teaching that a first pair of detaching rollers and a second pair of detaching rollers are arranged after the nipper unit, the first pair of detaching rollers being designed to perform a reciprocating rotary motion for soldering and detaching a fiber tuft to a fibrous web , and that the second pair of detaching rollers is adapted to perform a constant rotational movement, so that a loop of the batt is formed between the pairs of detaching rollers, which loop changes in length during a combing cycle.
  • a material buffer made of fibrous web is formed with the loop, which compensates for the different rotational movement and rotational speed of the pairs of detaching rollers without destroying the fiber tuft soldered to the fibrous web.
  • the loop must be so long that there is no tensile stress or stretching on the fiber web that is soldered on. This depends on the amount of feed and, among other things, on the diameter of the detaching rollers. This allows the first pair of detaching rollers to maintain the pilgering motion, thereby retaining the classic combing process including nipper motion and gearing arrangement. Only the movement and thus the drive of the second pair of detaching rollers is changed, in that they have a constant direction of rotation.
  • the motor for the second pair of detaching rollers can be made smaller and without water cooling, which makes the comber cheaper and more energy-efficient.
  • the combing method according to the invention is designed so that a fiber tuft is torn from the lap sliver by a reciprocating rotary motion by means of a first pair of detaching rollers arranged after the gripper unit and is soldered to a fiber web, with a second pair following in the direction of fiber transport Detaching rollers performs a rotational movement that is constant in the fiber transport direction, with a loop of the fibrous web formed between the pairs of detaching rollers changing in length during a combing cycle.
  • a material buffer is created by forming a loop, with which a constant direction of rotation of the second pair of detaching rollers is possible, although the first pair of detaching rollers continues to perform a mit step movement and thus the movement of the second pair Detaching rollers is in opposite directions.
  • the rotational movement of the second pair of take-off rollers is preferably constant over all combing cycles.
  • a simpler drive motor can thus be used for the second pair of take-off rollers, which is designed as a servo motor with a significantly lower drive power. Since the resulting forward movement of the pairs of detaching rollers must be absolutely equal in order not to consume the size of the loop, the drive motors of the first pair of detaching rollers and the drive motors of the second pair of detaching rollers must run synchronously. However, the drive motor for the second pair of detaching rollers can be designed more simply, with less power and without active cooling.
  • the rotational movement of the second pair of detaching rollers can be non-uniform during a combing cycle with the same direction of rotation.
  • the speed of rotation of the second pair of detaching rollers varies with the same direction of rotation, so that the length of the loop between the pairs of detaching rollers can be kept more constant. This reduces the pulsating formation of the loop in length between a maximum and a minimum.
  • the loop is preferably formed with its greatest length at a first reversal point of the first pair of detaching rollers, from which point the pair of detaching rollers moves the fibrous web back towards the nipper unit counter to the fiber transport direction.
  • the loop with its smallest length is preferably formed at a second reversal point of the first pair of detaching rollers, from which point the pair of detaching rollers moves the fibrous web away from the nipper unit again in the direction of fiber transport.
  • the difference in the angle of rotation between the two pairs of detaching rollers is still so large that no tensile stress or stretching acts on the fibrous web between the two pairs of detaching rollers.
  • the loop is formed at the beginning of the combing process by the first pair of detaching rollers being stationary and the second pair of detaching rollers rotating against the fiber transport direction.
  • the uncombed lap sliver is first guided through the gripper unit to behind the second pair of detaching rollers and through the funnel to the take-off rollers. Then only via the control of combing machine to start the formation of the loop. The then uncombed sliver must then be removed after the start of the combing machine according to the uncombed length.
  • the second pair of detaching rollers can stand still or only rotate slowly in the fiber transport direction, and the first pair of detaching rollers only conveys the uncombed lap in the fiber transport direction until the second pair of detaching rollers can pick up the lap sliver and the loop has formed. With the direction of rotation remaining the same, the speed difference between the first pair of detaching rollers and the second pair of detaching rollers is decisive.
  • the first pair of detaching rollers promotes the fibrous web in the direction of fiber transport and the second pair of detaching rollers, which reverses the direction of rotation, also promotes the fibrous web in the direction of fiber transport.
  • the formation and the position of the loop can be improved by a device in which the loop is formed between the upper detaching rollers or between the lower detaching rollers by means of an air flow.
  • loop formation is a highly dynamic process in which small disturbances, for example due to fiber adhesions on the detaching rollers, can interrupt the process, or the resulting fiber web can become uneven or damaged.
  • FIG. 1 shows a schematic side view of a combing head of a combing machine according to the prior art
  • FIG. 2a shows a representation of the detaching roller movement with a movement diagram in an initial position according to the invention
  • 2b shows the detaching roller movement with a movement diagram during the formation of a loop or a buffer according to the invention
  • 2c shows the detaching roller movement with a movement diagram after the formation of a loop or a buffer according to the invention.
  • FIGS. 2a to 2c The prior art is explained below with reference to FIG. 1 and preferred embodiments of the combing machine according to the invention are illustrated in FIGS. 2a to 2c.
  • the same features in the drawing are each provided with the same reference symbols.
  • the drawing is merely simplified and, in particular, is shown without scale.
  • FIG. 1 shows a prior art combing head 20, at least eight of which are mounted on a comber.
  • the combing head 20 consists, among other things, of two lap transport rollers 2, 3, on which a lap lap 1 with a winding tube lies and from which the lap 4 is unwound by a tensile load through a feed roller 7.
  • the lap transport rollers 2, 3 can be driven individually or both together.
  • the design of the lap transport rollers 2, 3, whether they are only rotating and not driven, or driven individually or both, is not relevant to the invention.
  • the wadding 4 is transferred to a feed cylinder 7 of a tong unit 5 .
  • the tong unit 5 can be driven back and forth via a lever via a shaft 6 which is connected to a gear 17 .
  • this is located Tong unit 5 is in a forward position and transfers the combed-out tuft to a subsequent pair of detaching rollers 10, 12, which is the first in the direction of fiber transport.
  • a circular comb 8 is rotatably mounted, which combs out the tuft presented by the closed nipper via its comb segment.
  • the circular comb 8 is also drive-connected to the gear 17 .
  • a ratchet wheel is fastened to the feed cylinder 7, which is rotated stepwise by the reciprocating movement of the nipper unit 5 by a pawl, also not shown, and thereby feeds the cotton sliver 4 to the pliers mouth of the pliers for combing out.
  • the lap sliver 4 is continuously unrolled by the rotary movement of the lap 1 over the lap transport rollers 2, 3 and reaches the feed cylinder 7.
  • the lap is then fed via the feed cylinder 7 to the nippers of the nippers unit 5 for combing out and then to that in the fiber transport direction first pair of detaching rollers 10, 12 released.
  • the end of the fiber tuft released is pulled through the top comb 9 and soldered to the previous tuft.
  • the resulting fiber web 14 is passed over a second pair of detaching rollers 11, 13 in the fiber transport direction.
  • the resulting fibrous web 14, which consists of individual pieces of tuft soldered on, is pulled through a funnel 15 by take-off rollers 16 and formed into a sliver 21 and fed to a drafting system, not shown, with the slivers also formed at the other combing heads.
  • the web emerging from the drafting system is combined into a fiber sliver, the so-called comber sliver, and transferred to a sliver coiler for storage in a can.
  • the nipper unit 5 is moved into a forward, open position, with the detaching rollers 10, 12 promoting a previously combed-out tuft with its rear end section by rotating it backwards in the direction of the front end section of the wadding clamped by means of the pliers.
  • the detaching rollers 11, 13 perform the same movement, so that the fibrous web 14 is moved back a little.
  • the fiber tuft combed out by the circular comb 8 lies on this rear end section and is drawn together with it into the nip of the detaching rollers 10, 12, since the detaching rollers 10, 12 and 11, 13 change the direction of rotation again.
  • the fiber tuft is torn off from the lap lying in the nippers unit 5 .
  • the rear end of the torn-off tuft is pulled through the top comb 9 .
  • the detaching rollers 10, 12, 11, 13 carry out a pilgering step movement, whereby they return an end piece of the fiber tuft drawn off during the previous comb game when they rotate back.
  • the initial piece of the fiber tuft is placed on this end piece and soldered together by the pressure of the two detaching rollers 10, 12 after a reversal of the direction of rotation.
  • the detaching rollers 10, 12, 11, 13 must not only change their direction of movement twice with each comb play, but also turn a shorter distance when running back than when running forward.
  • Figure 2a shows the initial state of the movement according to the invention of the detaching rollers 10, 12 and 11, 13 with the illustration on the left, in which the lap 4 clamped by the gripper unit 5 runs into the first pair of detaching rollers 10, 12 in the fiber transport direction (arrow) and between the Pairs of detaching rollers 10, 12 and 11, 13 is arranged as a streamlined batt 14.
  • This initial state is initiated once at the beginning or each time the comber is started.
  • the angle of rotation of the detaching rollers is entered on the ordinate and the time on the abscissa.
  • the combing machine is operated with a number of comb cycles of 20 per minute, so that a combing cycle lasts 3 seconds.
  • a single combing cycle 30 is carried out completely. That is, in the motion diagram, the rotational movement of the pairs of detaching rollers 10, 12 and 11, 13 of three combing cycles 30 are shown on the abscissa from 0 to 10, and the start of the combing machine when starting with the formation of the loop in the range from 0 to 1 32 or the buffer. With a comb play of 500/min, the same division of the diagram would show 75 combing cycles over 9 seconds, which have the same curve progression.
  • the movement of the second pair of detaching rollers 11, 13 in the fiber transport direction is drawn as a solid line, and the movement of the first pair of detaching rollers 10, 12 is drawn as a dashed line. With a value of 0 on the abscissa, both pairs of detaching rollers 10, 12 and 11, 13 have the angle of rotation 0°. In this initial state, the detaching rollers 10, 12 and 11, 13 are stationary.
  • Figure 2b shows the formation of a buffer or a loop 32 of the fiber batt 14 between the pairs of detaching rollers 10, 12 and 11, 13.
  • the first pair of detaching rollers 10, 12 is stationary and does not rotate, while the second pair of detaching rollers 11, 13 is rotated back through an angle of about -150° in this representation, so that a loop 32 is formed with a length over the distance between the detaching rollers 10, 12 and 11, 13 of a total of 60 mm.
  • the loop 32 currently being formed has a length of approximately 33 mm. This position shown is in the movement diagram at a value of 0.5 s.
  • the size of the loop 32 depends on the angle of rotation of the detaching rollers 11, 13 and their diameter and can differ from the combing machine types.
  • the setting of the size of the return of the detaching rollers 11, 13, ie the amount by which the second pair of detaching rollers 11, 13 is turned back, also depends on the feed amount set on the gripper unit 5 and can therefore vary.
  • the outer diameters of the lower rollers 10, 11 are around 25 mm and the outer diameters of the upper rollers 12, 13 are around 24.5 mm mm. Only the detaching rollers 10 and 11 are driven, whereas the detaching rollers 12 and 13 are pressed onto the lower detaching rollers 10 and 11 and run along through them due to friction.
  • the buffer or the loop 32 is almost completely formed from the fibrous web 14.
  • FIG. 2c the buffer or the loop 32 is almost completely formed from the fibrous web 14.
  • FIG. 1c it is sufficient to start the combing process.
  • the loop 32 can be up to 60 mm and thus sag between the detaching rollers 10, 12 and 11, 13 in the form shown.
  • the length of the loop 32 then increases briefly and reaches its maximum in the rotational angle difference between the reversal point U1 of the detaching rollers 10, 12 and the continuous rotational movement of the detaching rollers 11, 13.
  • the arrow in the movement diagram shows exactly the reversal point of the rotational movement at the detaching rollers 11, 13 or the starting point of the renewed rotational movement of the detaching rollers 10, 12, which are still stationary at this point in time, but are now starting the rotational movement.
  • the loop 32 of the fiber batt 14 serves to compensate for the different direction of rotation of the pairs of detaching rollers 10, 12 and 11, 13, i.e. in particular the return of the first pair of detaching rollers 10, 12 for tearing off and then soldering on the fiber tuft against the fiber transport direction.
  • the first pair of detaching rollers 10, 12 continue to perform the classic crawl-step movement according to the prior art, whereas the second pair of detaching rollers 11, 13, after the direction reversal, perform a linear rotary movement that is constant in speed can.
  • the rotational movement of the detaching rollers 10, 12 from the abscissa value 1 s to the reversal point U1 is in the fiber transport direction (arrow), i.e. towards the detaching rollers 11, 13, so that the lap 4 is pulled through the detaching rollers 10, 12 and the soldered fiber tuft is compacted .
  • the direction of rotation of the detaching rollers 10, 12 is reversed against the fiber transport direction, so that the combed-out end of the fiber tuft or, in this illustration, the wadding 4 is conveyed to the nipper unit 5 in order to start a new soldering process.
  • the rotational movement of the detaching rollers 10, 12 back is almost 270° and reduces the loop 32 or buffer so that the batt 14 is arranged almost straight between the detaching rollers 10, 12 and 11, 13.
  • the reversal point U2 shows this, since the distance in the movement curve of the diagram between the detaching rollers 10, 12 and 11, 13 is minimal.
  • the detaching rollers 10, 12 rotate again in such a way that the fiber batt 14 is conveyed in the fiber transport direction (arrow) and the loop 32 increases again, up to the end of the combing cycle 30, in which the fiber tuft is soldered on and then out of the nipper unit 5 will be demolished.
  • the size or length of the loop 32 is represented by means of the outer circumference of the detaching rollers 10, 11.
  • the detaching rollers 10, 12 with the steep curves and a very high acceleration Experience deceleration, i.e. permanently change the speed and direction of rotation (pilgrim step).
  • the detaching rollers 11, 13 rotate in only one direction at a constant speed during the combing process. Only when the combing machine is started, when combing, do the detaching rollers 11 , 13 rotate backwards in order to form the first loop 32 .
  • the detaching rollers 11, 13 It is possible to operate the detaching rollers 11, 13 with the same direction of rotation at a non-uniform speed, during which the detaching rollers 10, 12 can rotate more slowly between the reversal points U1 and U2, and faster again from the reversal point U2 can turn.
  • the exemplary embodiment disclosed here is the more energy-efficient form of operation for the detaching rollers 11, 13.
  • the loop 32 or buffer of the fibrous web 14 shown in FIGS. 2b and 2c hangs down here between the detaching rollers 10 and 11.
  • the loop 32 can also form between the detaching rollers 12 and 13. Air blowing from above or below between the pairs of detaching rollers 10, 12 and 11, 13 can promote the formation of loops, since the distances between the pairs of detaching rollers 10, 12 and 11, 13 are very small.
  • the invention has the advantage that only a first pair of detaching rollers 10, 12 performs the vocational step movement, while the second pair of detaching rollers 11, 13 performs a constant rotary movement.
  • the power loss for driving the second pair of detaching rollers 11, 13 is thus reduced, which reduces the energy consumption of the combing machine.
  • the water cooling of the drive motors can be omitted and the drive motor can be designed with a significantly lower drive power.
  • both pairs of detaching rollers 10, 12 and 11, 13 must carry out the same resulting forward movement, ie the same resulting angle of rotation.
  • the loop 32 can also be made smaller than in this exemplary embodiment. This can be influenced by the distances between the detaching roller pairs 10, 12 and 11, 13, their diameter, the amount of feed and other factors.
  • the second pair of detaching rollers 11, 13 has a rotational movement in the same direction, ie a constant rotational movement.
  • This rotational movement can preferably have the same speed (constant, unchanging rotational movement), with which the greatest effect in terms of energy saving can be achieved.
  • the rotational movement of the second pair of detaching rollers 11, 13 can also vary in speed, with which the formation of loops can be positively influenced and the resulting fiber web 14 becomes more uniform.

Landscapes

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

Abstract

L'invention concerne une peigneuse et un procédé de peignage de fibres, comprenant une peigneuse ayant une pluralité de têtes de peignage (20). Au moins un ruban de recouvrement (4) se déroule à partir d'un rouleau de recouvrement (1) au niveau de chaque tête de peignage (20) et est alimenté dans un cylindre d'alimentation (7) et un ensemble pince (5), les blouses sont peignées et éliminées par aspiration à partir du ruban de recouvrement (4) au moyen d'un peigne fixe et cylindrique (9, 8), et la bande de fibres créée est formée au moyen d'une trompette (15) en un ruban de fibres, qui est étiré avec les autres rubans de fibres depuis les autres têtes de peignage en un seul ruban de fibres. L'invention est caractérisée en ce qu'une première paire de rouleaux d'étirage (10, 12) et une seconde paire de rouleaux d'étirage (11, 13) sont disposées en aval de l'ensemble pince (5), la première paire de rouleaux d'étirage (10, 12) étant conçue pour exécuter un mouvement rotatif de va-et-vient pour un processus d'assemblage et d'arrachage d'une frange de fibres sur ou depuis une bande de fibres (14), et en ce que la seconde paire de rouleaux d'étirage (11, 13) est conçue pour exécuter une rotation constante, de telle sorte qu'une boucle (32) de la bande de fibres (14) est formée entre les paires de rouleaux d'étirage (10, 12 et 11, 13), ladite boucle changeant de longueur pendant un cycle de peignage.
EP21798980.5A 2021-01-27 2021-10-21 Peigneuse et procédé de fonctionnement d'une peigneuse Pending EP4284970A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021101809.9A DE102021101809A1 (de) 2021-01-27 2021-01-27 Kämmmaschine und Verfahren zum Betrieb einer Kämmmaschine
PCT/EP2021/079186 WO2022161652A1 (fr) 2021-01-27 2021-10-21 Peigneuse et procédé de fonctionnement d'une peigneuse

Publications (1)

Publication Number Publication Date
EP4284970A1 true EP4284970A1 (fr) 2023-12-06

Family

ID=78413993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21798980.5A Pending EP4284970A1 (fr) 2021-01-27 2021-10-21 Peigneuse et procédé de fonctionnement d'une peigneuse

Country Status (4)

Country Link
EP (1) EP4284970A1 (fr)
CN (1) CN116601346A (fr)
DE (1) DE102021101809A1 (fr)
WO (1) WO2022161652A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021134212A1 (de) 2021-12-22 2023-06-22 Trützschler Group SE Verfahren zum Betrieb einer Kämmmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE243062C (fr) *
CN1090255C (zh) * 1996-03-29 2002-09-04 里特机械公司 精梳机的分离－和接合装置
DE102012011030A1 (de) * 2012-06-05 2013-12-05 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Kämmmaschine mit einer Antriebsvorrichtung zur Erzeugung einer Pilgerschrittbewegung für die Abreißwalzen
IT201800001987A1 (it) * 2018-01-26 2019-07-26 Marzoli Machines Textile Srl Macchina pettinatrice
IT201800004119A1 (it) * 2018-03-30 2019-09-30 Marzoli Machines Textile Srl Pettinatrice di una linea di preparazione alla filatura e metodo di lavoro

Also Published As

Publication number Publication date
CN116601346A (zh) 2023-08-15
DE102021101809A1 (de) 2022-07-28
WO2022161652A1 (fr) 2022-08-04

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