EP4245897A1 - Peigneuse dotée d'un réglage amélioré de l'ouverture de pince supérieure - Google Patents

Peigneuse dotée d'un réglage amélioré de l'ouverture de pince supérieure Download PDF

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Publication number
EP4245897A1
EP4245897A1 EP23152329.1A EP23152329A EP4245897A1 EP 4245897 A1 EP4245897 A1 EP 4245897A1 EP 23152329 A EP23152329 A EP 23152329A EP 4245897 A1 EP4245897 A1 EP 4245897A1
Authority
EP
European Patent Office
Prior art keywords
pliers
tongs
shaft
coupling device
combing
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
EP23152329.1A
Other languages
German (de)
English (en)
Inventor
Dirk Meier
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 EP4245897A1 publication Critical patent/EP4245897A1/fr
Pending 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
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus
    • D01G19/16—Nipper mechanisms
    • 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
    • D01G19/26—Driving arrangements

Definitions

  • the invention relates to a combing machine for spinning preparation, having at least one combing head, wherein the combing head comprises a drive input shaft which is brought into operative connection with a drive motor of the combing machine, and wherein the combing head has a pliers gear with a pliers shaft which is drivingly connected to the drive input shaft and is set up to drive a pliers with lower pliers and upper pliers.
  • Modern combing machines have swinging tongs, reversing tear-off cylinders, a round comb and cleaning brushes as their essential components. These components form a combing head that can periodically carry out successive combing cycles, and with each combing cycle the pliers carry out the oscillating movement and the working cylinders reverse accordingly while the round comb rotates and is cleaned with a cleaning brush.
  • the fiber structure is separated by simultaneously swinging the forceps back and rotating the tear-off cylinders forward.
  • the tear-off cylinders then reverse again and feed the comb back in such a way that the newly combed fiber beard can be placed on top, whereupon the connection in the fiber strand can be re-established, which is referred to as so-called soldering.
  • the amount of seedling excretion is determined by the tear-off length, with the tear-off length being referred to as the so-called ecartement.
  • the ecartement is the spatial distance between a clamping line between the upper tongs and lower tongs and the opposite clamping line between the front tear-off cylinders. The ecartement therefore forms the distance between the two clamping media, which occurs when the pliers approach the front tear-off cylinder as closely as possible.
  • the size of the ecartement determines the length of the beard of fibers, which hangs out freely when the pliers are closed and can be combed out with the round comb. If the fiber length distribution in the sliver remains the same, the larger the ecartement, the more fibers are combed out. This means that the excretion of seedlings increases as the ecartement increases and decreases accordingly as the ecartement decreases.
  • All known combing machines essentially control the elimination of the amount of noils through the possibility of changing the values determined by the machine Size of the ecartement, whereby the ecartement is essentially changed by adjusting the external reversal point of the movement of the forceps apparatus.
  • the axes of the driven tear-off rollers are spatially fixed, and the tear-off rollers only carry out an oscillating, mitral-like rotational movement in order to enable the tuft of fibers to be combed out and the subsequent soldering.
  • gauges are known which are inserted into the pliers opening in the front reversal position between the upper pliers and the lower pliers, whereby the measurement can be picked up by the gauge at a certain rotational position of the pliers shaft.
  • the rotational position of the pliers shaft and thus also the position of the upper pliers is directly dependent on the ecartement, so that the pliers opening is changed depending on the ecartement, and so that the closing time of the pliers is constant with the same rotational position of the pliers shaft or also the drive input shaft.
  • a gauge is therefore required for the adjustment, although the adjustment of the pliers opening is difficult to automate since the gauge must be inserted into the opened pliers for the adjustment. Since the closing time is the technologically important influencing factor, the pliers opening is an aid to avoid setting in a further comb play position within the pliers.
  • the invention includes the technical teaching that at least one coupling device is set up in the driving operative connection between the upper pliers and the pliers shaft, with which the operative connection can be released at least temporarily in order to adjust the opening position of the pliers apparatus.
  • the core idea of the invention is the possibility of temporarily decoupling the upper pliers from the rest of the pliers apparatus, so that the combing head can first be brought into a defined comb clearance position, in particular a defined ecartement position, and so that the pliers can then be closed in a defined manner.
  • a coupling device is to be provided for this purpose, which is set up in the driving connection of the pliers shaft to drive the lower pliers and the upper pliers.
  • the setting of the pliers contact i.e. the point at which the upper pliers just touch the lower pliers but no clamping force is yet built up between the pliers, can be done at a specific rotational position of the pliers shaft, which is defined at a defined distance from the actual ecartement position , and the upper tongs can be moved freely into the closed position.
  • This position is hereinafter referred to as the ecartement subsidiary position.
  • the coupling device can then be closed again, and the pliers movement that occurs in this way corresponds correctly to the phase progression of the comb cycle and therefore also to the ecartement position, without the need for a gauge that has to be inserted between the opened pliers.
  • the coupling device advantageously has an electrically activatable actuating means.
  • the coupling device can be integrated in a gear stage between the upper tongs and the tongs shaft.
  • the gear stage can be a toothing or a traction device connection, for example a toothed belt, a chain or the like, with the coupling device being set up, for example on a gear, a chain wheel or the like, for example to temporarily release a shaft-hub connection.
  • the coupling device can be set up in conjunction with a spring strut, which serves to build up the clamping force between the pliers and which applies force to the upper pliers in a manner known per se.
  • a control unit is provided with which the coupling device and in particular the actuating means can be controlled in order to release and close the operative connection between the upper pliers and the pliers shaft.
  • the control unit can therefore be used to control the clutch device and in particular the actuating means, so that this control can also take place remotely from the device of the clutch and the actuating means.
  • the control unit relates in particular to the control unit that is used to control the combing machine.
  • a rotation angle sensor is set up, for example in an arrangement on the drive input shaft or in an arrangement on the pliers shaft, with the rotation angle sensor being able to determine or detect an angular position of the pliers shaft and output it to the control unit.
  • the control unit can also use the rotation angle sensor detect the ecartement position so that the upper pliers can be released from the rest of the pliers at the defined ecartement position by the control unit controlling the coupling device or the actuating means accordingly.
  • the upper tongs can be set up in such a way that they can fall into the closed position against the lower tongs due to gravity when the coupling device is open.
  • this makes adjusting the closing state between the upper tongs and the lower tongs particularly easy, and a corresponding actuator can also be provided in addition or alternatively, with which the upper tongs can be moved into the powerless closing position against the lower tongs when the coupling device is open. The coupling device can then be closed again.
  • the control unit for controlling the combing machine is designed in particular to move to a defined secondary ecartement position of the lower tongs and to stop the pliers in the defined ecartement secondary position.
  • the defined ecartement position is initially the position at which the pliers have the minimum distance to the tear-off cylinders on the front. In this position, the upper tongs are opened the widest relative to the lower tongs, and this position also forms the front turning point of the tongs relative to the tear-off rollers. Starting from this ecartement position, the comb play is continued until a certain angular position can be approached at which the ecartement secondary position is reached.
  • the coupling device can release the connection between the upper pliers and the rest of the pliers, and the upper pliers can be closed against the lower pliers without any force.
  • the coupling device can then be closed again.
  • the clamping force can then be built up and the combing cycle can be repeated periodically.
  • the approach to the corresponding position in the comb cycle can be provided for both a forward feed and a return feed, whereby the comb clearance position, at which the pliers should just be closed before the clamping force is built up between the upper pliers and the lower pliers, is known.
  • This known position is approached accordingly, which is referred to here as the secondary position of the lower tongs relative to the tear-off cylinders.
  • control unit for controlling the combing machine is designed to move to this defined ecartement position of the lower tongs and to stop the tongs device in the defined ecartement position.
  • the invention is further directed to a method for adjusting the opening position of the tongs apparatus of the combing machine according to the above description, the method having at least the following steps: approaching the defined ecartement position of the lower tongs, releasing the driving operative connection between the upper tongs and the pliers shaft by means of the coupling device, transferring the upper pliers into a closed position against the lower pliers and closing the operative connection between the upper pliers and the pliers shaft by means of the coupling device.
  • the position of the fixed comb in relation to the tear-off rollers can first be adjusted, and then the closing time of the pliers can be easily adjusted.
  • the setting of the technological parameters in the combing head can be completed with an automatic fixed comb depth adjustment.
  • the change in the amount of food and the adjustment of the food trough within the tongs can be automated, with only a simple coupling device and corresponding programming in the machine control being necessary.
  • the defined ecartement secondary position corresponds to the position in which the upper tongs must close without force against the lower tongs, directly before the closing force is built up between the upper tongs and the lower tongs in the ongoing combing cycle.
  • This position must be differentiated from the actual ecartement position, in which the distance between the lower pliers and the tear-off cylinders is minimal, but the distance between the ecartement position and the ecartement secondary position is technologically defined and therefore known for each ecartement.
  • the upper pliers can be dropped into the closed position against the lower pliers due to gravity. If the automatic, gravity-related closing of the upper tongs relative to the lower tongs does not work, a corresponding actuator, for example a small servomotor, can be provided.
  • the coupling device can be closed again, in particular by means of the actuating means.
  • the process can in particular be automated. It is provided that the approach to the defined ecartement secondary position of the lower tongs and/or the actuation of the coupling device by means of the actuating means and/or the powerless closing of the Upper pliers are carried out against the lower pliers by means of the control unit, so that the opening position of the pliers is automatically adjusted.
  • control unit can have an input/output interface, for example in the form of a touch-sensitive screen. This means that the automatic setting of the opening position of the pliers can be triggered and/or monitored by an operator.
  • Figure 1 shows a combing head 1, which is used to comb out a fiber strand 20, whereby the fiber strand 20 can also be referred to as a fiber fleece or as cotton wool.
  • the fiber strand 20 is stored on a fiber roll 21 in an uncombed state, and the fiber roll 21 is received on two winding rollers 22. This means that the fiber roll 21 can be unwound by rotating the winding rollers 22 and fed to the combing head 1.
  • the fiber strand 20 runs over a feed cylinder 23 and is then fed to the tongs apparatus, which forms the main component of the combing head 1.
  • the forceps apparatus has a lower forceps 14 and an upper forceps 15, with the fiber strand 20 passing between the upper forceps 14 and the lower forceps 15.
  • the upper tongs 14 and the lower tongs 15 close, the fiber strand 20 is held in place and can be torn off via the tear-off cylinders 24, while the tongs apparatus moves away from the tear-off cylinders 24 (to the right in the image plane).
  • the upper tongs 14 and the lower tongs 15 are closed and subjected to force so that the fiber strand 20 is held in place and tears off.
  • the combed fiber strand 20 runs into the front and rear tear-off cylinders 24, whereby the fiber strand 20 then runs into the take-off rollers 25 arranged in pairs and can then be deposited, for example in appropriate cans.
  • the upper tongs 15 are accommodated in a pivot point 26 so that they can pivot relative to the lower tongs 14.
  • the lower pliers 14 is connected to a pliers arm 27, which is attached to the pliers shaft 13, and due to the oscillating movement of the pliers shaft 13, the pliers arm 27 and thus also the upper pliers 15 carry out an oscillating movement, so that the pliers 14, 15 move periodically Remove the tear-off cylinders 24 and approach them again.
  • FIG. 2 shows a gear replacement diagram of the combing head 1, with the essential functions being described below.
  • the combing head 1 has a drive input shaft 10, which is driven via a drive motor 11.
  • the drive motor 11 first drives a secondary shaft 30, which is part of a secondary gear 31, the secondary gear driving, for example, the desk calendar rollers 32 and, for example, delivery rollers 33.
  • a gear 34 is mounted on the secondary shaft 30, which meshes with a main drive wheel 35, and the main drive wheel 35 has a rigid connection to the drive input shaft 10, which is thus continuously driven in rotation by the drive motor 11.
  • the drive input shaft 10 drives the round comb roller 28 with its rotational movement, and the tear-off cylinders 24 are also driven with the rotational movement of the drive input shaft 10 via a gear stage 36.
  • the tear-off cylinders 24 can also each have their own assigned electric motor drives.
  • a crank rocker 37 is arranged on the main drive wheel 35, via which the pliers shaft 13 is driven in an oscillating manner.
  • the oscillating movement of the pliers shaft 13 is transferred to a pliers apparatus (not shown) in order to drive an upper pliers on a corresponding upper pliers shaft, shown with the position 15, and a lower pliers on the lower pliers shaft 15.
  • a pliers apparatus (not shown) in order to drive an upper pliers on a corresponding upper pliers shaft, shown with the position 15, and a lower pliers on the lower pliers shaft 15.
  • a rotation angle sensor 19 is arranged on the pliers shaft 13, shown as an example, in order to transmit the angular position of the pliers shaft 13 to a control unit 18.
  • the upper pliers 15, shown as a pliers shaft, is connected to the pliers shaft 13 by means of coupling devices 16, so that the oscillating movement in the pliers shaft 13 can be transmitted to the upper pliers 15 via the coupling device 16.
  • two coupling devices 16 are set up, since the pliers shaft of the upper pliers 15 can be connected to the pliers shaft 13 on both sides at its ends with a corresponding operative connection.
  • the coupling devices 16 create the possibility of decoupling the upper pliers 15 from the lower pliers 14 on the pliers shaft 13 in order to adjust the pliers opening in the decoupled state.
  • FIG. 2 The detail X according to Figure 2 is in the Figures 2a and 2b shown, where in Figure 2a the coupling device 16 in an open and in Figure 2b is shown in a closed state.
  • FIGs 3a, 3b and 3c show different positions of the upper tongs 15 relative to the lower tongs 14 in the ongoing, periodically repeating combing cycle.
  • the upper pliers 15 are opened to the maximum relative to the lower pliers 14, and it is precisely in this position that the distance between the pliers and the tear-off cylinders is minimal, so that the actual ecartement is set or results in this position.
  • a spring leg 38 is arranged on the upper tongs 15, which is not compressed according to the opening position, since in the opening position the upper tongs 15 oppose the lower tongs 14 without force.
  • Figure 5 shows the course of the closing force F over the angular position W of the upper pliers shaft 40.
  • the course of the force begins as shown in the first position P1 and continues with the value 0 to the second position P2, whereupon over the section A1 Increase in strength follows.
  • the following section A2 is the section through which the upper tongs 15 are detached from the lower tongs 14, with section A1 following this tong opening according to section A2.
  • the pliers are opened the widest and the ecartement is adjusted so that the pliers 14 and 15 are at a minimum distance from the tear-off cylinders 24, i.e. the ecartement position referred to here.
  • the so-called ecartement secondary position the pliers close so that the upper pliers 14 just touch the lower pliers 15, with the closing force not yet being applied.
  • the coupling device 16 can now be opened, and the upper tongs 15 ideally fall onto the lower tongs 14 due to gravity or are closed without applying a closing force F by means of a corresponding actuator brought together.
  • the coupling device 16 can then be closed again, with the opening and closing of the coupling device 16 and the application of the upper tongs 15 to the lower tongs 14 taking place solely in the second point P2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP23152329.1A 2022-03-17 2023-01-19 Peigneuse dotée d'un réglage amélioré de l'ouverture de pince supérieure Pending EP4245897A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022106279.1A DE102022106279A1 (de) 2022-03-17 2022-03-17 Kämmmaschine mit verbesserter Einstellung der Oberzangenöffnung

Publications (1)

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EP4245897A1 true EP4245897A1 (fr) 2023-09-20

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Application Number Title Priority Date Filing Date
EP23152329.1A Pending EP4245897A1 (fr) 2022-03-17 2023-01-19 Peigneuse dotée d'un réglage amélioré de l'ouverture de pince supérieure

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EP (1) EP4245897A1 (fr)
DE (1) DE102022106279A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879106A (en) * 1957-06-01 1961-10-04 Rieter Joh Jacob & Cie Ag Improvements relating to machines for combing textile fibres
US5197163A (en) * 1991-06-04 1993-03-30 Rieter Machine Works, Ltd. Nipper unit for a combing machine
EP0967307A2 (fr) * 1998-06-25 1999-12-29 Maschinenfabrik Rieter Ag Pince d'une machine de peignage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879106A (en) * 1957-06-01 1961-10-04 Rieter Joh Jacob & Cie Ag Improvements relating to machines for combing textile fibres
US5197163A (en) * 1991-06-04 1993-03-30 Rieter Machine Works, Ltd. Nipper unit for a combing machine
EP0967307A2 (fr) * 1998-06-25 1999-12-29 Maschinenfabrik Rieter Ag Pince d'une machine de peignage

Also Published As

Publication number Publication date
DE102022106279A1 (de) 2023-09-21

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