EP4665902A1 - Procédé pour rattacher automatiquement une mèche dans un système d'étirage, et système d'étirage pour étirer une mèche cardée - Google Patents

Procédé pour rattacher automatiquement une mèche dans un système d'étirage, et système d'étirage pour étirer une mèche cardée

Info

Publication number
EP4665902A1
EP4665902A1 EP24702290.8A EP24702290A EP4665902A1 EP 4665902 A1 EP4665902 A1 EP 4665902A1 EP 24702290 A EP24702290 A EP 24702290A EP 4665902 A1 EP4665902 A1 EP 4665902A1
Authority
EP
European Patent Office
Prior art keywords
sliver
rollers
pair
drafting
card
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
EP24702290.8A
Other languages
German (de)
English (en)
Inventor
Maximilian Marx
Jose Guadelupe Flores Molina
Christoph Leinders
Jörg Schmitz
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 EP4665902A1 publication Critical patent/EP4665902A1/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
    • 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
    • D01G15/64—Drafting or twisting apparatus associated with doffing arrangements or with web-dividing apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/10—Carding machines with other apparatus, e.g. drafting devices, in integral or closely-associated combination
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing

Definitions

  • the present invention relates to a method for automatically piecing a sliver into a drafting system, as well as a drafting system for drawing a single carded sliver before depositing it in a can, wherein the sliver is produced in a card and runs uninterruptedly into the drafting system, which is arranged on the upper side of the can changer associated with the card.
  • These integrated draw frames can be controlled or uncontrolled. In contrast to known draw frames, where several fiber slivers are drawn and doubled together, these integrated draw frames only process a single incoming fiber sliver. They often have a two-zone draw frame consisting of a 3-over-3 or 3-over-4 roller arrangement, the width of the draw field of which is limited. This limits the use for certain fiber lengths, since the textile properties of the yarn produced subsequently are not sufficient, particularly when processing short fibers ( ⁇ 20 mm) with only one fiber sliver. Particularly when processing recycled In textiles, the proportion of short fibres in the fibre mixture increases, which is more complex to process.
  • Threading the sliver from the card into the drafting system has so far been very time-consuming and error-prone and requires a lot of practice from the operator.
  • the sliver is fed from the card, which is operated at a low delivery speed, into the drafting system.
  • the drafting system housing must be opened and the sliver fed in by hand until it is caught by the first pair of drafting system rollers that are already rotating. Only when the sliver is fed into the delivery tube without errors can the housing be closed and the card can increase the delivery speed of the sliver to be produced.
  • the invention is based on the object of simplifying and automating the threading into the drafting system.
  • the invention solves the problem by a method having the features specified in claim 1, as well as by a drafting system having the features of claim 8.
  • Advantageous developments of the invention are defined in the dependent claims.
  • the invention relates to a method for automatically piecing a single carded sliver in a drafting system before depositing it in a can, whereby the sliver is produced in a card and runs uninterruptedly into the drafting system, which is arranged on the top of the can changer (W) associated with the card.
  • the card is operated at a low delivery speed so that the sliver runs out of the card at a delivery speed of 10 m/min to 100 m/min.
  • a sensor detects the running out of the sliver and sends a signal to the card control system.
  • the card control system starts the drafting system and an operator places the sliver running out of the card into an upper first funnel of the drafting system.
  • the beginning of the sliver is then detected by a pair of input measuring rollers.
  • a sensor on the input measuring roller pair sends a signal to the carding machine control system, which starts the introduction of compressed air into a second funnel arranged at the lower end of the drafting system in the direction of material flow. This creates a suction draft within the drafting system.
  • the beginning of the sliver is caught by a first pair of stretching rollers and passed on to a second pair of stretching rollers arranged vertically below.
  • the sliver is drawn from the second pair of stretching rollers into the second funnel by suction and is
  • the material is guided by output measuring rollers arranged behind it into a storage tube of a rotating can plate.
  • the operator can insert the beginning of the sliver into the closed housing, whereby it is automatically threaded or drawn through all components of the drafting system.
  • the laborious threading of the sliver through the open drafting system rollers is therefore not necessary.
  • the process reduces errors when threading the sliver and enables automatic and faster threading.
  • the absence of an intermediate storage in a can is referred to as uninterrupted feeding from the card into the drafting system. Or in other words, the sliver emerging from the card is inserted into the drafting system with or without the use of an intermediate storage device.
  • the fiber band can be guided into the upper gusset of the second stretching roller pair by a pressure rod arranged between the stretching roller pairs.
  • the inclination of the pressure rod in its longitudinal direction from the horizontal by an angle (a) of 40° to 60° in the vertical direction, preferably 50° to 55°, can promote automatic piecing, since the fiber band from the first stretching roller pair hits the inclined upper side of the pressure rod and is thus guided along the convex contour to the second stretching roller pair. This advantage is at least evident when the stretching roller pairs are arranged with an offset in the horizontal alignment.
  • the drafting system becomes a regulated drafting system, as the mass deviation of the fiber sliver between the pair of input measuring rollers and the pair of output measuring rollers is recorded and the draft of the drafting system is adjusted.
  • the output measuring roller pair can have a sensor whose signal is sent to the card control system when the sliver is detected, so that the card can start up to operating speed.
  • the sensor can also be located at another point at the output of the drafting system in order to detect that the sliver is running into the delivery tube of the rotating can plate without sliver jamming or sliver breakage.
  • the operation of the drafting system can be stopped if the sensor of the output measuring roller pair does not respond after a predetermined time difference after detection of the The time difference can be between one and five seconds, depending on the sliver weight, the card delivery speed and the stretch draft.
  • the operation of the drafting system can be stopped by the card control if a sensor, which is arranged in front of the delivery tube or monitors it, detects a sliver jam or sliver breakage.
  • the introduction of compressed air during a can change at the second funnel can take place for a predetermined time before, during and after the creation of a thin spot in the sliver.
  • the length of the predetermined time can be entered in the carding machine control system. This prevents the resulting sliver beginning from building up inside the drafting system after the sliver has been torn apart.
  • the drafting system is designed to draw a single carded fiber sliver, wherein the fiber sliver is produced in a card and runs uninterruptedly into the drafting system, which is arranged on the top of the can changer associated with the card.
  • the drafting system has an upper first funnel, followed in the direction of material flow by an input measuring roller pair with a sensor, and followed in the direction of material flow by a vertically arranged 2-over-2 drafting system with an upper first pair of drafting rollers and a lower second pair of drafting rollers.
  • a second funnel is arranged, which is designed to generate a suction draft within the drafting system by introducing compressed air.
  • the second funnel is a pair of rollers, which is designed to draw the fiber sliver into the deposit tube of a can plate.
  • the vertical arrangement of the drafting system components in combination with the suction draft within the drafting system enables automatic piecing with the housing closed.
  • the operator can insert the beginning of the sliver into the closed housing, whereby it is automatically threaded or drawn through all the components of the drafting system. The time-consuming threading of the sliver through the open drafting system rollers is therefore not necessary.
  • the second pair of stretching rollers can be arranged with a horizontal offset to the first pair of stretching rollers.
  • a pressure rod can be arranged below the first pair of stretching rollers in such a way that the fiber band is guided by a convex surface of the pressure rod perpendicular to the upper gusset of the second pair of stretching rollers.
  • the pair of rollers for drawing the sliver into the delivery tube can be designed as an output measuring roller pair, the height of the drafting system is reduced on the one hand, and on the other hand the drafting system can be used in conjunction with the input measuring roller pair as a regulated drafting system.
  • the output measuring roller pair can have a sensor whose signals are sent to the carding machine control system. The sensor signals can be used to store the automatic piecing in the carding machine control system as "successfully completed", so that the delivery speed of the carding machine increases automatically.
  • a sensor can monitor the inlet of the delivery tube for a sliver break or sliver jam.
  • the operation of the drafting system can be stopped by the card control system and the card can be reduced to its operating speed.
  • the drafting system is preferably designed as a controlled drafting system.
  • the input measuring rollers and the output measuring rollers have the task of regulating or monitoring the drawn sliver mass and can also be designed to detect errors during automatic piecing or a sliver break or jam.
  • the upper and lower pairs of drafting rollers can be driven independently of one another.
  • the drives can be designed as servo drives, which means that there is no need to change gears when the drafting field width or draft changes depending on the fibers to be processed.
  • the sliver storage between the drafting system and the card has no influence on the automatic piecing. Its function only comes into effect when the can is changed.
  • Figure 1 a carding machine with a subsequent can deposit and an integrated
  • Figure 2a, 2b a perspective view of the closed and opened
  • Figure 3 a front view of the essential components of the line according to the invention.
  • Figure 4a, 4b two representations of the stretching roller pairs with the pressure bar with different stretching field widths
  • Figure 5 a first perspective view of the storage of the
  • Figure 6 a top view of the drafting system with the top rollers unlocked
  • Figure 7 a second perspective view of the storage of the
  • Figure 8 shows a view of the back of the track with the
  • Figure 1 shows a carding machine K in which the produced sliver FB is guided to the drafting system 1 via several deflection rollers R.
  • the drafting system 1 is arranged on the top of the can changer W and is integrated into it and is thus a component of the carding machine K.
  • a storage unit S for the sliver FB is arranged, which is designed to at least partially compensate for a difference in the delivery speed of the sliver FB between the carding machine K and the drafting system 1.
  • the use or arrangement of the storage unit S is not relevant to the invention.
  • a Cartesian coordinate system is used here, in which the z-direction is the vertical with which the sliver FB enters the drafting system 1.
  • the y-direction corresponds in the following Figures of the longitudinal axis of the drafting rollers and the x-direction is aligned orthogonally to the longitudinal axis of the drafting rollers.
  • What is essential for the invention is that a single fiber sliver FB runs vertically (z-direction) into the drafting system 1 with the force of gravity.
  • FIGS 2a and 2b show the closed and opened hood 2 of the draw frame 1 according to the invention, which has wings 2a, 2b that can be opened horizontally on a front side so that the drafting system is accessible for maintenance work.
  • the wings 2a, 2b are pivotally attached to the hood 2 by means of hinges.
  • Also arranged on the hood 2 is a cover flap 3 that can be pivoted upwards and has an opening 3a.
  • the cover flap 3 is integrated into the wings 2a, 2b so that the wings 2a, 2b have a corresponding recess for the contour of the cover flap 3.
  • a deflection roller R is arranged on the cover flap 3, by means of which the fiber sliver FB can be deflected and introduced into the opening 3a of the cover flap 3 in the upper first funnel 5.
  • a pipe 37 is arranged on the top of the hood 2, on which a line for connection to the exhaust air from the spinning preparation can be arranged. The dust and unprocessed fiber material can be removed via the pipe 37.
  • the draw frame 1 is arranged on the top of a can changer W, with a shelf A in the form of a recess arranged on the top.
  • the shelf A is designed in such a way that the upper rollers 7, 8 of the drafting system 1 can be laid down for the duration of maintenance or cleaning.
  • Figure 3 shows a first front view of the opened drafting system 1 after the hood 2 and the cover flap 3 have been removed. Only a front part of the upper drive housing 4a can be seen, which, according to the other figures, extends further behind the arrangement of the rollers and funnels and is not shown here.
  • the fiber sliver FB runs vertically (z direction) into the first funnel 5 and is grasped by the input measuring roller pair 6a, 6b.
  • the funnel 5 is designed to be pivoted upwards in the vertical direction (Z direction) away from the input measuring roller pair 6a, 6b in order to enable cleaning of the subsequent input measuring roller pair 6a, 6b or to eliminate faulty piecing.
  • the following input measuring roller pair 6a, 6b is designed to detect the deviation of the fiber sliver FB from a predetermined sliver mass and to feed the measured values into a control (not shown) and to display them on a display, which can be, for example, the control of the carding machine K.
  • a control not shown
  • an input measuring roller 6b is mounted in a stationary, rotatable manner, while a second input measuring roller 6a is mounted so as to be displaceable relative to the first input measuring roller 6b.
  • the displacement of the second input measuring roller 6a can be detected, for example, with a plunger coil or another sensor, and the change in path can be converted into a mass deviation.
  • roller cleaners in the form of scrapers can be arranged on both sides of the input measuring roller pair 6a, 6b, with which the surface of the input measuring rollers 6a, 6b is cleaned.
  • the input measuring roller pair 6a, 6b can be designed as a grooved/sensing roller or as stepped rollers, or can comprise two smooth rollers.
  • a stripper 16 or another guide element can be arranged below the left measuring roller 6b shown in this view, with which the fiber sliver FB is released from the input measuring roller pair 6a, 6b and guided into the first stretching roller pair 7, 8.
  • a lever 36a can be used to release a pressure load (not shown) on the movable input measuring roller 6a, which can be used to move the roller away from the stationary input measuring roller 6b. This makes it easier to maintain and clean the pair of input measuring rollers 6a, 6b and the upper pair of stretching rollers 7, 8 arranged underneath.
  • the lever 36a is shown in a locked position for the movable input measuring roller 6a.
  • the fiber sliver FB continues to run vertically downwards until it is gripped by the first lower roller 7 and the first upper roller 8. These two rollers 7, 8 form the first pair of stretching rollers. With a slight offset against the x-direction, the fiber sliver FB hits a pressure rod 13, is guided past it and reaches the second pair of stretching rollers, which is formed by the second lower roller 9 and the second upper roller 10.
  • the drafting system 1 according to the invention is thus designed as a vertically arranged 2-over-2 drafting system (single-zone drafting system), with two lower rollers 7, 9 and two upper rollers 8, 10.
  • upper and lower rollers are referred to here, comparable to a normal drafting system with a horizontal material flow direction of the fiber sliver, since the lower rollers have a metallic, corrugated surface and the upper rollers are provided with a plastic or rubber covering.
  • the fiber band FB is stretched in length by the first and second pairs of stretching rollers due to different speeds and is guided into the second funnel 14. Also visible are a first and a second cylinder 11a, 12a, with which the upper rollers 8, 10 are pressed at one end against the lower rollers 7, 9 with the pistons of the cylinders 11a, 12a in the opposite direction to the x-direction.
  • the funnel 14 is designed as a piecing aid and has lateral swirl nozzles along the inner bore through which compressed air flows. This creates a suction draft at the funnel opening, with which the fiber sliver FB is drawn into the funnel and guided to the output measuring roller pair 15a, 15b.
  • the output measuring roller pair 15a, 15b is also designed to detect the deviation of the strip mass from a predetermined value.
  • a first fixed output measuring roller 15a interacts with a movably mounted second output measuring roller 15b, the change in distance of which from the first fixed output measuring roller 15a is converted into a strip mass deviation by a sensor (not shown), for example in the control of the carding machine.
  • the output measuring roller pair 15a, 15b can be designed as a smooth roller pair or as a grooved/sensing roller pair or with stepped rollers. Not further specified, roller cleaners in the form of scrapers can be arranged on both sides of the output measuring roller pair 15a, 15b, with which the surface of the measuring rollers is cleaned.
  • a lever 36b can be used to release a pressure load (not shown) on the movable output measuring roller 15a, which can be used to move the roller away from the stationary output measuring roller 15b.
  • the lever 36b is shown in Figures 5 to 7 in a position locked for the movable output measuring roller 15a, and in Figure 8 in an open position for the movable output measuring roller 15a.
  • the stretched fiber sliver FB is deposited in a can (not shown) by a known depositing tube 40 that is rotated by a can plate 41, for example in the form of a cycloid.
  • a sensor 17 is arranged between the output measuring roller pair 15a, 15b and the depositing tube 40, which is designed to monitor the entrance or the opening of the depositing tube 40 for a possible sliver jam.
  • the signals from the input measuring roller pair 6a, 6b and the output measuring roller pair 15a, 15b can be processed in the control system of the card K or in the control system of the spinning preparation system.
  • the control system can output a signal when an automatic piecing process has been successful.
  • both measuring roller pairs 6a, 6b; 15a, 15b generate a uniform signal for the sliver mass. If after the automatic piecing only the input measuring roller pair 6a, 6b shows a uniform signal, but the output measuring roller pair 15a, 15b shows no signal or a significantly changed signal, this is an indication of a break in the fiber sliver FB.
  • the card K is operated at a low delivery speed or operating speed, which can be, for example, between 10 m/min and 100 m/min speed of the outgoing sliver.
  • the speed of the card is preferably 10 m/min to 50 m/min.
  • the carded fiber web is transferred from the card doffer to the subsequent cross belt or the take-off rollers, for example, and introduced into the integrated funnel.
  • the subsequent measuring rollers at the card outlet can already detect the sliver mass of the formed fiber sliver FB or the deviation of the fiber sliver mass from a reference, and the associated signal is processed in the card control system.
  • the control system of the card K automatically starts the drafting system 1 by the drives 21, 30 driving the input measuring rollers 6a, 6b, the drafting roller pairs 7,8; 9,10 and the output measuring roller pairs 15a, 15b.
  • the drafting system 1 is locked, which means that the pneumatic loading of the upper rollers 8, 10 is activated.
  • the drive 30 causes the can plate 41 of the can changer W to rotate.
  • the operator removes the sliver FB running out of the card K by hand and, with the hood 2 closed, feeds it through the opening 3a into the upper first funnel 5 of the draw frame 1.
  • the start of the sliver FB is detected by the input measuring roller pair 6a, 6b and drawn into the draw frame 1.
  • the associated sensor When the input measuring roller pair 6a, 6b is detected, the associated sensor sends a signal to the control system of the card K, which generates compressed air to create a suction draft on the second funnel 14.
  • the suction draft assists the threading of the sliver FB by the sliver FB being detected and drawn in by the first draw roller pair 7, 8. Due to the horizontal offset of the draw roller pairs 7, 8; 9,10, the fiber sliver FB impacts on the side surface of the pressure rod 13 and is guided to the upper gusset of the second pair of drafting rollers 9, 10, is grasped by this and is drawn by the suction into the second funnel 14.
  • the rotary movement of the pairs of drafting rollers 7,8; 9,10 also generates an air flow within the drafting system 1, which promotes automatic threading.
  • the fiber sliver FB can then be grasped by the pair of output measuring rollers 15a, 15b and guided into the depositing tube 40 to the already rotating can plate 41.
  • the associated sensor can transmit a signal to the control system of the card K, which recognizes the threading of the fiber sliver as successfully completed and can stop the introduction of compressed air at the second funnel 14.
  • the delivery speed of the card is increased to the operating speed required for the fiber quality without the need for an operator to intervene.
  • the speed of draw frame 1 and can changer W is also adjusted to the production speed or delivery speed of the card.
  • the automatic threading is not successful, for example due to a sliver break or a sliver jam, this can be recognized by the fact that either no sliver runs into the can via the delivery tube 40 or the output measuring roller pair 15a, 15b does not send a signal to the control of the card K.
  • the control of the card switches off the drafting system 1 if the output measuring roller pair 15a, 15b does not send a signal to the card control system within a time of, for example, one to five seconds after the sliver has been detected by the sensor of the input measuring roller pair 6a, 6b.
  • the sensor 17 can send a signal to the card control system to abort the automatic threading process.
  • the draw frame 1 and the can changer W are stopped, while at the same time the card K continues to operate at the low delivery speed or operating speed. Sliver therefore continues to run out of the card slowly but continuously.
  • the draw frame 1 is unlocked, removing the pressure on the top rollers 8, 10.
  • the hood 2 of the draw frame 1 is opened and the sliver residues can be removed. When the hood 2 of the draw frame 1 is closed, locking takes place, i.e. the pressure is applied to the upper rollers 8, 10.
  • the drives 21, 30 start the input measuring rollers 6a, 6b, the draw roller pairs 7,8; 9,10 and the output measuring roller pairs 15a, 15b.
  • the fiber sliver FB from the card K can be fed back into the upper funnel 5 and the automatic piecing process starts again.
  • the compressed air can be introduced to generate a suction draft at the second funnel 14 before a thin spot is created in the fiber sliver FB.
  • the compressed air continues to be generated until the fiber sliver FB is at least again grasped by the output measuring roller pair 15a, 15b.
  • the time for blowing the compressed air into the second funnel 14 before and after the thin spot is created in the fiber sliver FB can be set in the control system of the carding machine.
  • take-off rollers can also be used to guide the fiber sliver into the depositing tube 40.
  • Figures 4a and 4b show the arrangement of the drafting rollers 7, 8, 9, 10 in relation to one another in combination with the pressure rod 13.
  • the drafting field between the clamping points P1 and P2 is offset from the vertical by the dimension V in the opposite direction to the x-direction.
  • the value for V can be between 5 mm and 12 mm.
  • the first upper roller 8 is arranged offset vertically in the z-direction below the first lower roller 7.
  • the second upper roller 10 is arranged offset vertically in the z-direction below the second lower roller 9.
  • the offset V of the upper to the lower drafting rollers 7, 8; 9, 10 results in the arrangement of the pressure rod 13 between the first and second upper rollers 8, 10, so that the fiber sliver FB is deflected by the pressure rod 13 to the second clamping point P2.
  • the pressure rod 13 is arranged in a fixed position at a distance from the first pair of stretching rollers 7, 8 and is formed by a rectangular or square base body, on whose outer surface a convex contour is placed.
  • the convex contour can be designed as a semicircle or as a circular segment, which has a continuous radius.
  • the pressure rod 13 can Clamping line spacing when processing short fibers can be increased from L1 with 35mm (Fig. 4a) to L2 with 75mm (Fig. 4b).
  • the pressure rod 13 In its longitudinal direction, the pressure rod 13 is inclined by the angle a from the vertical in the horizontal direction.
  • the angle a can be between 40° and 60°, preferably between 50° and 55°.
  • the center line of the pressure rod 13 can intersect the center of the first top roller 8.
  • the pressure rod 13 is preferably arranged in such a way that the fiber sliver FB strikes the upwardly directed and inclined side surface of the pressure rod 13 from the clamping point P1 between the first pair of stretching rollers 7, 8 and is guided by the convex surface of the pressure rod 13 perpendicular to the second clamping point P2.
  • the convex surface of the pressure rod 13 is thus tangent to a vertical line that passes through the second clamping point P2 of the second pair of stretching rollers 9, 10.
  • the inclined arrangement of the pressure rod by the angle a just behind the first pair of stretching rollers 7, 8 promotes the automatic introduction of the fiber band FB into the drafting system 1.
  • the clamping line distance L1, L2 can be changed using simple adjustment means without decoupling and removing the drafting system rollers 7, 8 from the drives.
  • the distance between the pressure rod 13 and the first drafting system rollers 7, 8 does not change in the process.
  • Figure 5 shows a perspective view of the drafting system 1 without the hood 2.
  • a first drive 21 is arranged on an upper drive housing 4a, which drives the input measuring roller pair 6a, 6b and the first lower roller 7.
  • An upper support 22a is also arranged on the upper drive housing 4a, on which an upper counter bearing 19a with the first cylinder 11b are arranged orthogonally.
  • the upper counter bearing 19a with the first cylinder 11b are designed to support a first End of the first top roller 8 in an upper bearing block 18a.
  • the second end of the first top roller 8 is mounted in the upper drive housing 4a.
  • the upper bearing block 18a which supports the first end of the first bottom roller 7 and the first top roller 8.
  • the second end of the first bottom roller 7 is mounted in the upper drive housing 4a.
  • the first bottom roller 7 is mounted in a stationary manner with the second end on or in the upper drive housing 4a.
  • the other first end of the first bottom roller 7 is also mounted in a stationary manner on the upper bearing block 18a.
  • the upper bearing block 18a extends parallel to the upper drive housing 4a and is connected to it by the upper counter bearing 19a.
  • the first top roller 8 is mounted so that it can be moved in the x-direction towards the first bottom roller 7, which is explained in more detail in Figure 7.
  • a lower bearing block 18b which is also arranged parallel to the lower drive housing 4b and is connected to it by means of a lower support 22b.
  • the second lower roller 9 is stationary and the second upper roller 10 is movable in the x-direction towards the second lower roller 9 on the lower bearing block 18, each with their first end.
  • the second lower roller 9 is stationary and the second upper roller 10 is movable in the x-direction towards the second lower roller 9 in the lower drive housing 4b, each with their second end.
  • a second cylinder 12b is arranged on a lower counter bearing 19b.
  • the lower counter bearing 19b with the second cylinder 12b are designed to lock the bearing of a first end of the second upper roller 10 in a lower bearing block 18b.
  • the lower drive housing 4b accommodates the second lower roller 9, the second upper roller 10, as well as the pair of output measuring rollers 15a, 15b and the second funnel 14 arranged above them.
  • This second funnel 14 is arranged so that it can be pivoted in a horizontal orientation by means of a lever 14a on a pivot bearing 14b.
  • the compressed air supply is carried out via the lever 14a, with which the suction effect is generated via the swirl nozzles (not shown).
  • the pivotability of the second funnel 14 improves the cleaning of the drafting system 1.
  • a lower support 22b is also arranged on the lower drive housing 4b, on which a lower bearing block 18b (shown in a concealed manner) for the second upper and lower rollers 9, 10 and a lower counter bearing 19b for the second upper roller 10 are arranged.
  • the upper drive housing 4a can be adjusted in terms of its distance from the lower drive housing 4b by means of a concealed adjusting element 23.
  • the upper drive housing 4a is attached to a lateral vertically aligned guide so that it can be adjusted in a vertical alignment (z-direction).
  • the adjustment can be used to adjust the clamping line distance L1, L2 of the pairs of drafting rollers from one another. so that if the fiber quality changes, the drafting system 1 can be adjusted in a few simple steps.
  • a lateral guide plate 24 with, for example, an integrated dovetail or linear guide corresponds to an outer surface of the upper drive housing 4a.
  • the adjusting element 23 can be designed, for example, as a threaded spindle or motor drive.
  • the first and second lower rollers 7, 9 are mounted with their second end in the upper and lower drive housings 4a, 4b in a stationary and rotatable manner.
  • the drive elements engage on the back of the drive housing 4a, 4b, as explained in Figure 8.
  • the respective first ends of the first and second lower rollers 7, 9 are mounted with their second end in the upper and lower drive housings 4a, 4b in a stationary and rotatable manner, as shown in Figure 8.
  • the respective first ends of the first and second lower rollers 7, 9 are mounted with their second end in the upper and lower drive housings 4a, 4b in a stationary and rotatable manner, as shown in Figure 8.
  • the first and second top rollers 8, 10 are each assigned a counter bearing 19a, 19b with an integrated cylinder 11b, 12b, whereby the counter bearings 19a, 19b are in turn arranged and fastened to the supports 22a, 22b.
  • the pistons of the cylinders 11b, 12b act in the x-direction, i.e. opposite to the direction of force of the cylinder pistons 11a, 12a from Figure 3.
  • Each counter bearing 19a, 19b has a rocker arm 20a, 20b, against the first end of which the piston rod of the respective cylinder 11b, 12b presses.
  • the rocker arms 20a, 20b fix the top rollers 8, 10 in the bearing block 18a, 18b, but at the same time also adjust the load pressure between the drafting roller pairs 7, 8; 9, 10.
  • the rocker arms 20a, 20b are shown in Figure 5 in a position in which no load pressure is exerted on the top rollers 8, 10, but these can be removed from the bearings.
  • the longitudinally opposite arrangement of the cylinders 11b, 12b to the cylinders 11a, 12a results in a free space at the front of the drafting system 1, which facilitates the assembly/disassembly of the top rollers 8, 10 as well as the cleaning and removal of sliver jams or sliver breakage.
  • the lower rollers 7, 9 are driven.
  • the upper rollers 8, 10 are pressed directly at the second end by the cylinders 11a, 12a, and at their first end by the cylinders 11b, 12b indirectly by means of the rocker arms 20a, 20b onto the lower rollers 7, 9 and are also driven by friction.
  • the rocker arms 20a, 20b thus divert the direction of force of the cylinders 11b, 12b from the x-direction by 180° against the x-direction.
  • the lower rollers 7, 9 have the usual grooved metallic surfaces, whereas the upper rollers 8, 10 have a rubber or plastic coating.
  • FIG. 6 shows a top view of the already released upper rollers 8, 10, whereby only the first upper roller 8 with the upper components is completely visible.
  • the lower and upper rollers 7, 9; 8, 10 correspond unchanged to the known state of the art.
  • the upper roller 8 shown here has a roller core made of steel, on which an elastic roller cover 8.1, for example made of rubber or plastic, is arranged.
  • Two roller journals 8.2, 8.3 hold the upper roller 8 on both sides in a bearing guide 25a.
  • the pressure force required for stretching is applied on both sides by the cylinders 11a, 11b to roller bearings 8.4, 8.5, which are arranged between the roller journals 8.2, 8.3 and the roller cover 8.1.
  • the upper rollers 8, 10 are designed asymmetrically, whereby the roller cover 8.1 protrudes beyond the counter surface of the lower rollers 7, 9.
  • the top rollers 8, 10 can be installed rotated by 180° when the first effective surface for stretching the fiber band FB is worn.
  • the same structure applies to the second top roller 10, even if this is not shown in the figures.
  • the pressure force on the second roller bearing 8.5 is applied by the cylinder 11a, and the pressure force on the first roller bearing 8.4 by the rocker arm 20a, which deflects the force of the cylinder 11b by 180°.
  • the upper bearing block 18a and the upper counter bearing 19a are arranged orthogonally on the upper support 22a.
  • the first lower roller 7 can also be seen and, with an offset V against the x-direction, the second lower roller 9 arranged underneath.
  • the cylinder 11b which acts in the x-direction, can be seen in a retracted position, whereby the rocker arm 20a is in a relieving position.
  • the cylinder 11a which acts against the x-direction on the second roller bearing 8.5 of the upper roller 8, is shown hidden. In this position, this cylinder 11a is also retracted, so that the upper roller can be pushed out of the bearing guide in the x-direction.
  • the situation described here is identical for the other hidden components 12a, 12b, 18b, 19b, 20b, 22b.
  • the first and second upper rollers 8, 10 have been displaced in the x-direction in a bearing guide 25a, 25b (not shown) in the lower and upper drive housing 4a, 4b, and are therefore located at a distance from the lower rollers 7, 9.
  • Figure 7 shows the dismantled top rollers 8, 10 in perspective.
  • a horizontally arranged (x-direction) bearing guide 25a, 25b can be seen for the second end of the top rollers 8, 10.
  • the roller journals of the top rollers 8, 10 at the second end engage in these bearing guides 25a, 25b.
  • the same arrangement applies to the roller journals of the top rollers 8, 10 at the first end, which engage in bearing guides (not shown) on the respective bearing block 18a, 18b.
  • the cylinders 11a, 12a, 11b, 12b press the upper rollers 8, 10 with their roller covering against the metallic upper side of the lower rollers 7, 9 with constant force.
  • FIG. 8 shows the rear of the inventive draw frame with the drive concept.
  • the upper drive housing 4a is completely separated from the lower drive housing 4b and can be moved along the guide plate 24 by means of an adjusting element 23 (not shown), so that the clamping line spacing L1, L2 can be adjusted without adjusting the drafting rollers 7, 8, 9, 10 individually.
  • Both the upper and lower drive housings 4a, 4b each have a separate, independent drive that is not affected by the adjustment of the clamping line spacing.
  • the upper drive housing 4a has a first drive 21, from which the second adjustable input measuring roller 6b and the first lower roller 7 are driven by means of a first belt 26.
  • a second belt 28 drives the first input measuring roller 6a from the driven second input measuring roller 6b and is deflected by a deflection roller 29.
  • the drive direction of the first and second input measuring rollers 6a, 6b is opposite, so that the fiber sliver FB is transported vertically downwards by the input measuring rollers 6a, 6b.
  • a sensor 27 is arranged on the stationary input measuring roller 6b, which is designed to determine the concentricity of this roller 6b and to compensate for any possible non-circular running by measuring technology. This controls the measurement accuracy of the determined sliver mass deviation.
  • the sensor 27 can be designed, for example, as a plunger coil or piezo element.
  • the first upper roller 8 is pressed against the first lower roller 7 by the pressure of the cylinders 11a, 11b on the roller bearings 8.4, 8.5 with the roller cover 8.1 and is thereby driven by friction.
  • the separation of the drives into an upper drive housing 4a with the first stretching roller pair 7, 8 and a lower drive housing 4b with the two stretching roller pairs 9, 10 enables the clamping line distance L1, L2 to be adjusted, whereby the stretching roller pairs can be controlled separately in terms of the speed of the lower rollers 7, 9 and the load pressure of the upper rollers 8, 10.
  • the driven measuring rollers 6b, 15b are decoupled from one another in terms of drive technology, so that no crossed belts have to be used.
  • the lower drive housing 4b also has its own second drive 30, which is simultaneously used to drive the can plate 41.
  • a first belt 31 drives the second lower roller 9 and the fixed output measuring roller 15a.
  • the adjustable output measuring roller 15b is driven by a second belt 32 from the fixed output measuring roller 15a.
  • the second belt 32 is deflected by the deflection roller 34 so that both output measuring rollers 15a, 15b are driven in opposite directions and pull the fiber band FB between them and transport it into the depositing tube 40.
  • a tensioning element 35 ensures the necessary belt tension.
  • the second drive 30 drives a third belt 33 which sets the can plate 41 in rotation.
  • the drives 21, 30 can be designed as servo drives, which eliminates the need to change gears when the stretching field width or the draft changes depending on the fibers to be processed.
  • W can changer x, y, z direction a angle pressure rod

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention concerne un procédé et un système d'étirage pour rattacher automatiquement une mèche cardée unique dans un système d'étirage avant qu'elle ne soit déposée dans une boîte, la mèche étant produite dans une machine à carder (K) et s'étendant en continu dans le système d'étirage (1) qui est disposé sur le côté supérieur du changeur de boîte (W) associé à la machine à carder (K), le procédé comprenant les étapes suivantes : la machine à carder (K) est actionnée avec une vitesse de mèche sortante (FB) de 10 m/min à 100 m/min (ou vitesse de tambour?), la mèche sortante (FB) est détectée à la sortie de la machine à carder (K) au moyen d'un capteur et le système d'étirage (1) est démarré à l'aide du système de commande de la machine à carder, un opérateur insère manuellement la mèche (FB) dans une première trémie supérieure (5) du système d'étirage (1), le début de la mèche (FB) est détecté à l'aide d'une paire de rouleaux de mesure d'entrée (6a, 6b) et, par introduction d'air comprimé, un effet d'aspiration est généré vers une seconde trémie (14) disposée en aval dans la direction d'écoulement de matériau, la mèche (FB) est saisie par une première paire de rouleaux d'étirage (7, 8) et transmise à une seconde paire de rouleaux d'étirage (9, 10) disposés verticalement au-dessous de la première paire ; la mèche (FB) est aspirée à travers la seconde trémie (14) et la mèche est aspirée dans un tube de dépôt (40) d'une plaque de boîte rotative (41).
EP24702290.8A 2023-02-13 2024-01-25 Procédé pour rattacher automatiquement une mèche dans un système d'étirage, et système d'étirage pour étirer une mèche cardée Pending EP4665902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023103423.5A DE102023103423A1 (de) 2023-02-13 2023-02-13 Verfahren zum automatischen Anspinnen eines Faserbandes in ein Streckwerk und Streckwerk zum Verstrecken eines kardierten Faserbandes
PCT/EP2024/051739 WO2024170246A1 (fr) 2023-02-13 2024-01-25 Procédé pour rattacher automatiquement une mèche dans un système d'étirage, et système d'étirage pour étirer une mèche cardée

Publications (1)

Publication Number Publication Date
EP4665902A1 true EP4665902A1 (fr) 2025-12-24

Family

ID=89767070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24702290.8A Pending EP4665902A1 (fr) 2023-02-13 2024-01-25 Procédé pour rattacher automatiquement une mèche dans un système d'étirage, et système d'étirage pour étirer une mèche cardée

Country Status (4)

Country Link
EP (1) EP4665902A1 (fr)
CN (1) CN120457248A (fr)
DE (1) DE102023103423A1 (fr)
WO (1) WO2024170246A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19721758B4 (de) * 1996-06-29 2010-12-02 TRüTZSCHLER GMBH & CO. KG Vorrichtung an einer Karde, bei der am Ausgang der Karde ein Flortrichter mit Abzugswalzen vorhanden ist
EP1329541A3 (fr) * 1998-05-13 2003-08-27 Maschinenfabrik Rieter Ag Machine pour le traitement de matériau textile avec banc d'étirage

Also Published As

Publication number Publication date
DE102023103423A1 (de) 2024-08-14
WO2024170246A1 (fr) 2024-08-22
CN120457248A (zh) 2025-08-08

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