EP3484801B1 - Method for processing a strand-shaped fiber sliver, and roving frame machine - Google Patents
Method for processing a strand-shaped fiber sliver, and roving frame machine Download PDFInfo
- Publication number
- EP3484801B1 EP3484801B1 EP17740114.8A EP17740114A EP3484801B1 EP 3484801 B1 EP3484801 B1 EP 3484801B1 EP 17740114 A EP17740114 A EP 17740114A EP 3484801 B1 EP3484801 B1 EP 3484801B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roving
- air
- spinning nozzle
- receptacle
- jet spinning
- 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.)
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Links
- 239000000835 fiber Substances 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 36
- 238000009987 spinning Methods 0.000 claims description 61
- 238000000151 deposition Methods 0.000 claims description 38
- 238000010042 air jet spinning Methods 0.000 claims description 34
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000009940 knitting Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 description 12
- 239000004753 textile Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 206010020112 Hirsutism Diseases 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007378 ring spinning Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/76—Depositing materials in cans or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
- B65H54/88—Arrangements for taking-up waste material before or after winding or depositing by means of pneumatic arrangements, e.g. suction guns
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/11—Spinning by false-twisting
- D01H1/115—Spinning by false-twisting using pneumatic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
- B65H2701/311—Slivers
Definitions
- the present invention relates to a method for processing a strand-shaped fiber structure, the fiber structure being fed to an air spinning nozzle of a roving machine used to produce roving, the fiber structure being rotated within the air spinning nozzle during normal operation of the air spinning nozzle with the aid of a turbulent air flow, so that a roving is formed from the fiber structure, and wherein the roving finally leaves the air-spinning nozzle via an outlet of the air-spinning nozzle.
- Roving machines with corresponding air spinning nozzles are known in the prior art and are used to produce a roving from an elongated, strand-like fiber structure.
- the air spinning nozzles usually and preferably also in the air spinning machine according to the present invention comprise an internal turbulence chamber and air nozzles opening into the turbulence chamber, via which a turbulent air flow is generated within the turbulence chamber during operation of the air spinning machine.
- the outer fibers of the fiber structure are wound around the inner core fibers by the turbulent air flow in the area of the inlet opening of a yarn-forming element extending into the turbulence chamber and thus form the core fibers that are crucial for the desired strength of the roving. This creates a roving with a real twist, which is finally discharged from the vortex chamber via a discharge channel and finally leaves the air spinning nozzle via an outlet.
- roving is to be understood as meaning a fiber structure in which at least some of the fibers are wound around an internal core.
- This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to pull the yarn to a subsequent To transport textile machine, is still warpable.
- the roving can thus using a default device, z. B. the drafting system, a textile machine processing the roving, for example a ring spinning machine, before it is finally spun into a conventional yarn.
- a corresponding roving machine is, for example, in EP 2511403 A1 described.
- Closest prior art DE3034812 discloses an apparatus for automatically inserting a sliver into a hopper.
- CH221905 discloses a method of roving fibers and a machine for carrying out the method.
- the method for processing a strand-shaped fiber structure is now characterized in that the roving leaving the air spinning nozzle is deposited in or on a receptacle provided in the area of the roving machine.
- the roving is not wound onto a tube to form a spool. Rather, it is loosely deposited in or on the receptacle, from which it can be removed again after the receptacle has been transported to a subsequent textile machine and processed further.
- the receptacle is preferably a container, particularly preferably a container that is open at the top, as is known in spinning mills and is generally referred to as a sliver can.
- the sliver can be designed to be round or elongated, for example rectangular, in a plan view.
- shape of the container for the present invention is of secondary importance.
- the receptacle it is also conceivable for the receptacle to be designed merely as a flat section without side walls, onto which the roving is deposited, for example in heaps, during deposition.
- the recording can thus z. B. be present as a disc-shaped element that can be transported after the filing of the roving with the roving to another textile machine.
- the decisive factor is that the roving is not wound tightly onto a tube, as is usual, but is placed in or on the receptacle in such a way that it is no longer subjected to tensile stress after being placed.
- the receptacle is preferably designed as a container which has a volume of at least 0.05 m 3 , preferably at least 0.1 m 3 . Since the amount of roving deposited in or on the receptacle corresponds to the multiple of the amount of roving that can be wound onto a tube, the roving deposited according to the invention can also be passed on to textile machines that have a high roving consumption. For example, appropriately filled containers are ideal as templates for a conventional air-jet spinning machine, on which several hundred meters of yarn per minute are produced at each spinning position.
- the roving is preferably placed in or on the receptacle in such a way that after the receptacle has been completely filled, the roving has an average density of at least 0.14 g/cm 3 , preferably at least 0.15 g/cm 3 , particularly preferably at least 0 .16 g/cm 3 .
- the roving is drawn off from the air spinning nozzle with the aid of a drawing-off device.
- the take-off device can, for example, comprise two corresponding take-off rollers driven by a drive, between which the roving is clamped out after leaving the air spinning nozzle and directed in the direction of the recording.
- the roving After passing the take-off device, the roving finally reaches the area of a depositing device, is grasped by it and deposited in or on the receptacle.
- the depositing device ensures that the roving gets into or onto the receptacle in a defined and controlled manner, so that knotting or unfavorable and undefined overlapping of the roving for later removal of the roving from the receptacle are avoided.
- the roving is preferably deposited in loops in or on the receptacle with the aid of the take-off device, it being possible for the loops to have a circular or oval shape at least in sections.
- the depositing device preferably comprises a depositing plate with a depositing channel through which the roving is guided during depositing, with the depositing plate being set in rotary motion during depositing of the roving, preferably with the aid of a drive.
- the drive can be the same drive that also drives the depositing plate, so that both plates can be driven synchronously.
- the storage plate and/or the turntable can also be driven with the aid of a drive which causes a non-rotary movement of the corresponding turntable and/or the storage plate.
- a drive which causes a non-rotary movement of the corresponding turntable and/or the storage plate.
- another movement element could be provided, on which the receptacle is placed or otherwise held while the roving is being deposited and which is moved on a movement path that consists of or includes individual linear or curved sections in order to prevent unwanted rotations of the roving around its longitudinal axis during filing.
- the recording can be moved exclusively or partially in a translatory manner.
- the recording is alternately rotated in a first and an opposite second direction.
- the receptacle could be alternately rotated 360° clockwise and then counterclockwise by the same amount to avoid unwanted rotations of the laid roving.
- two storage plates could be present, which deposits the roving from two air spinning nozzles arranged next to one another in or on a common receptacle. In this case, too, the storage plates could rotate alternately in opposite directions, with an angular range of 180° being advantageous here.
- the roving after passing the take-off device, is immediately grasped by the depositing device and deposited in or on the receptacle.
- the take-off device there are no further elements between the take-off device and the depositing devices that guide the roving through direct contact.
- one or more sensors can be arranged between the take-off device and the depositing device, which monitor the quality of the roving (thickness, hairiness, etc.) or monitor whether roving emerges from the air spinning nozzle at all and/or enters the area of the depositing device or which monitor the course of the roving.
- the roving forms a slack between the take-off device and the depositing device, the vertical spatial extent of which is regulated via the depositing speed of the depositing device.
- the roving thus describes a parabola, for example, between the air spinning nozzle or the take-off device and the depositing device or a guide located in front of it (e.g. a guide roller). If the vertical spatial extension exceeds or reaches a predetermined maximum value, the depositing speed is increased.
- the depositing speed is reduced, the depositing speed being increased or decreased, for example, by changing the rotational speed of the depositing plate and/or the turntable, and the change preferably being effected by a Control of the roving machine is made automatically.
- the roving is guided via a guide between the take-off device and the depositing device.
- the guide may be in the form of a conveyor belt or an elongate channel, for example, and there could be one or more nozzles connected to a compressed air supply to direct the roving towards the laying device or through the guide with the aid of compressed air.
- the nozzles can also serve as a threading aid due to the air flow emanating from them, in order to move the roving into or onto the guide after it has left the draw-off device or the air spinning nozzle.
- the normal operation of the roving machine (during which roving is produced and deposited in or on the take-up) is interrupted by stop phases in which no roving is produced by the air spinning nozzle.
- Reasons for this are, for example, tearing of the roving, a problem in feeding the fiber structure or clogging of the air spinning nozzle.
- a start phase is run through between such a stop phase and the subsequent normal operation.
- the starting phase is characterized by the fact that the production of the roving is resumed, with the roving produced by the air spinning nozzle during the starting phase being at least temporarily not deposited in or on the receptacle after leaving the air spinning nozzle, but being disposed of via a roving discharge.
- the roving removal can be, for example, a suction element (e.g. a suction tube) to which negative pressure is applied.
- a suction element e.g. a suction tube
- a receptacle changing process is carried out.
- the amount of roving or length of roving or the degree of filling mentioned can be monitored with the aid of one or more sensors.
- the receptacle that has been filled up to this point in time is replaced by an empty receptacle.
- the changing process can be carried out automatically with the aid of a take-up changing device on the roving machine or else manually by an operator.
- roving should be produced by the air-jet spinning machine during the take-up changing process.
- the roving produced is thus placed in or on a first receptacle before the receptacle changing process.
- the roving is deposited in or on the second take-up, with the corresponding take-ups being shifted under the air spinning nozzle, which always remains in the same place (e.g. by the above-mentioned take-up changing device).
- a roving loop present between the two recordings after the recording changeover process must finally be severed in order to be able to remove the full recording from the roving machine independently of the filling of the new recording.
- the roving produced by the air spinning nozzle during the take-up changing process is disposed of at least in sections via a roving discharge.
- the roving is thus produced continuously during the recording change process, getting into or onto a first recording before the recording changing process and after or already during the recording changing process in or onto a second recording.
- the roving leaving the air spinning nozzle is discharged via the roving discharge, with the roving section located in or on the first receptacle being separated beforehand.
- the roving leaving the air spinning nozzle is finally fed back to the depositing device, which deposits the roving in or on the above-mentioned second recording.
- the amount of roving produced per unit of time by the air spinning nozzle is throttled at least temporarily compared to normal operation during the take-up changing process or during the time in which the roving is disposed of via the roving discharge, in order to minimize the amount of roving disposed of.
- the production of the roving is temporarily interrupted during or before the take-up changing process. This can be done either by stopping the feed of the fiber structure into the air spinning nozzle or by interrupting the air supply to the same. In any case, the roving production is stopped. If the previously filled recording was replaced by an empty recording, the roving production can be continued again, it being advantageous in principle if the depositing device is already in motion, z. B. in rotation, is offset before the roving reaches the storage device.
- the receptacle is moved to an air-jet spinning machine used for the production of conventional yarn after it has been partially or completely filled with roving, the roving present in or on the receptacle being spun into a yarn using the air-jet spinning machine.
- the filled receptacle thus serves as a template for the air-jet spinning machine, which also uses a turbulent air flow to produce a conventional yarn from the roving, which can finally be processed into a fabric, for example with the help of a weaving machine.
- Corresponding air spinning machines are sufficient in the prior art are known and generally include a large number of spinning positions, each with a drafting system for drawing the roving, a downstream air spinning nozzle for imparting the desired twist and thus for producing the yarn, and a winding unit for winding the yarn leaving the air spinning nozzle.
- the receptacle after it has been partially or completely filled with roving, is moved to a spinning and knitting machine used to produce a knitted fabric, with a knitted fabric being produced from the roving present in or on the receptacle using the spinning and knitting machine.
- a spinning and knitting machine usually also includes a drafting system for warping the roving.
- the knitting unit processes the warped roving into a knitted fabric.
- the knitting unit of the spin-knitting machine can be located a few centimeters to several meters away from the twisting unit. If this distance is above a predetermined maximum value, it can be advantageous to equip the material with one or more filaments, whereby the filament can be introduced into the material flow in the area of the drafting system or the twist unit, thus creating a kind of core yarn.
- the roving machine according to the invention for producing a roving from a strand-like fiber structure comprises at least one air spinning nozzle for producing roving from the fiber structure fed to the air spinning nozzle, wherein the air spinning nozzle is designed to impart a rotation to the fiber structure within the air spinning nozzle with the aid of a turbulent air flow generated by air nozzles of the air spinning nozzle , so that a roving is formed from the fiber structure, and wherein the air spinning nozzle has an outlet via which the roving leaves the air spinning nozzle during operation of the same, wherein the roving machine comprises a depositing device, with the help of which the roving leaving the air spinning nozzle into or onto a receptacle can be deposited, and wherein the roving machine has a roving discharge for at least temporary disposal of the roving produced by the air-jet spinning nozzle after leaving the air-spinning nozzle, and wherein the roving machine has a take-off device for drawing off the Includes roving from the
- the roving machine includes a controller or is connected to a controller that is designed to operate the roving machine according to the method described above.
- the roving machine can include a drafting system with several drafting system rollers 15, each of which can be rotated about an axis of rotation (only two of the six drafting system rollers 15 are provided with a reference number), the drafting system being connected to a fiber structure 1, for example in the form of a doubled draw frame sliver, during the spinning operation , is supplied.
- the roving machine shown comprises one or more air spinning nozzles 2 arranged adjacent to one another, each with an internal vortex chamber 23 (see FIG 2 ), in which the fiber structure 1 or at least some of the fibers of the fiber structure 1 is provided with a twist (the precise mode of operation of the spinneret is described in more detail below).
- the roving machine comprises a take-off device 6, preferably with a plurality of interacting take-off rollers 16, with the aid of which the roving 3 leaving the spinneret via its outlet 4 is grasped and guided (The pull-off rollers 16 can preferably be set in rotary motion with the aid of a drive, which is not shown).
- the roving machine must not necessarily have a drafting system, as in the 1 and 3 is shown.
- the roving machine works according to an air spinning process.
- the fiber structure 1 is guided into the turbulence chamber 23 of the air spinning nozzle 2 via an inlet 13 of the air spinning nozzle 2, in which a so-called fiber guiding element 14 is preferably arranged (see also 2 ).
- a so-called fiber guiding element 14 is preferably arranged (see also 2 ).
- Some of the fibers are pulled out of the fiber structure 1 at least a little and wound around the tip of a yarn-forming element 11 protruding into the eddy chamber 23 .
- the free fiber ends are finally also pulled in the direction of the yarn-forming element 11 and, in the process, wrap around the centrally running core fibers as so-called winding fibers - resulting in a roving 3 having the desired twist.
- the roving 3 produced is a yarn with a relatively small proportion of twisted fibers, or a yarn in which the twisted fibers are wrapped relatively loosely around the inner core, so that the Roving 3 remains draftable.
- a subsequent textile machine e.g. a conventional air-jet spinning machine
- a drafting system in order to be able to be further processed into a conventional yarn which can be processed into a fabric, for example on a weaving machine.
- the core of the present invention is now the 1 and 3 refer to. So it was previously customary to rove 3 regardless of whether it was with a conventional flyer or an air roving machine, to be wound onto a sleeve.
- the present invention now proposes loosely depositing the roving 3 after leaving the air spinning nozzle 2 in a receptacle 5 designed as a container, with the sliver cans known in spinning mills preferably being able to be used here.
- the roving machine has a depositing device 7 for this purpose, which comprises at least one depositing plate 18 .
- the depositing plate 18 can be rotated with the aid of a drive (not shown) in order to be able to place the roving 3 coming from the air spinning nozzle 2 in a loop in the receptacle 5 .
- the storage device 7 can also have an in 3 shown turntable 19, with the help of which the receptacle 5 can be set into rotary motion.
- both the turntable 19 and the storage plate 18 (which in the case of 3 offset to the central axis of the receptacle 5) is set into a rotary movement, this results in the in 3 laying pattern of the roving 3 shown below left or the shown loops 22 ( 3 shows a section of a roving frame and also a partially filled with roving 3 receptacle 5 from above; of course, this does not reflect the actual position of the receptacle 5 with respect to the roving frame).
- the roving 3 can either be fed directly to the deposit plate 18 or its internal and helically running deposit channel 21 after leaving the take-off device 6 ( 1 ).
- This embodiment of the roving frame does not fall under the subject matter of the claim.
- the roving 3 first forms a slack 8 and is then fed to the storage plate 18, with one or more sensors 17 and/or an additional guide 20, e.g. B. in the form of a leadership role, may be present.
- the sensor or sensors 17 monitor the vertical expansion of the slack 8, with a controller (not shown) regulating the rotational speed of the turntable 19 and/or the storage plate 18 on the basis of the measured values of the sensor or sensors 17, as described above, in order to monitor the vertical expansion in within a defined range.
- the roving machine has a roving removal 9, for example in the form of a suction tube. If the production of roving is now started, a starting phase takes place first, during which the roving 3 leaving the air spinning nozzle 2 is picked up by the roving discharge 9 and disposed of. If the quality of the roving 3 finally meets the specifications, the roving discharge 9 can be deactivated, with the roving section that has already been discharged from the roving discharge 9 being separated from the roving section with the aid of means (e.g. a cutting unit) that are not shown Air spinneret 2 is produced.
- means e.g. a cutting unit
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- Spinning Or Twisting Of Yarns (AREA)
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Verarbeiten eines strangförmigen Faserverbands, wobei der Faserverband einer Luftspinndüse einer der Herstellung von Vorgarn dienenden Vorspinnmaschine zugeführt wird, wobei dem Faserverband innerhalb der Luftspinndüse während eines Normalbetriebs der Luftspinndüse mit Hilfe einer Wirbelluftströmung eine Drehung erteilt wird, so dass aus dem Faserverband ein Vorgarn gebildet wird, und wobei das Vorgarn die Luftspinndüse schließlich über einen Auslass der Luftspinndüse verlässt.The present invention relates to a method for processing a strand-shaped fiber structure, the fiber structure being fed to an air spinning nozzle of a roving machine used to produce roving, the fiber structure being rotated within the air spinning nozzle during normal operation of the air spinning nozzle with the aid of a turbulent air flow, so that a roving is formed from the fiber structure, and wherein the roving finally leaves the air-spinning nozzle via an outlet of the air-spinning nozzle.
Vorspinnmaschinen mit entsprechenden Luftspinndüsen sind im Stand der Technik bekannt und dienen der Herstellung eines Vorgarns aus einem länglichen, strangförmigen Faserverband. Die Luftspinndüsen umfassen in der Regel und vorzugsweise auch bei der Luftspinnmaschine gemäß vorliegender Erfindung eine innenliegende Wirbelkammer sowie in die Wirbelkammer mündende Luftdüsen, über die beim Betrieb der Luftspinnmaschine innerhalb der Wirbelkammer eine Wirbelluftströmung erzeugt wird. Die äußeren Fasern des Faserverbands werden durch die Wirbelluftströmung im Bereich der Einlassmündung eines sich in die Wirbelkammer erstreckenden Garnbildungselements um die innenliegenden Kernfasern gewunden und bilden hierdurch die für die gewünschte Festigkeit des Vorgarns ausschlaggebenden Umwindefasern. Hierdurch entsteht ein Vorgarn mit einer echten Drehung, welches schließlich über einen Abzugskanal aus der Wirbelkammer abgeführt wird und die Luftspinndüse schließlich über einen Auslass verlässt.Roving machines with corresponding air spinning nozzles are known in the prior art and are used to produce a roving from an elongated, strand-like fiber structure. The air spinning nozzles usually and preferably also in the air spinning machine according to the present invention comprise an internal turbulence chamber and air nozzles opening into the turbulence chamber, via which a turbulent air flow is generated within the turbulence chamber during operation of the air spinning machine. The outer fibers of the fiber structure are wound around the inner core fibers by the turbulent air flow in the area of the inlet opening of a yarn-forming element extending into the turbulence chamber and thus form the core fibers that are crucial for the desired strength of the roving. This creates a roving with a real twist, which is finally discharged from the vortex chamber via a discharge channel and finally leaves the air spinning nozzle via an outlet.
Generell ist im Sinne der Erfindung unter dem Begriff Vorgarn (andere Bezeichnung: Lunte) ein Faserverband zu verstehen, bei dem zumindest ein Teil der Fasern um einen innenliegenden Kern gewunden sind. Diese Art Garn zeichnet sich dadurch aus, dass sie trotz einer gewissen Festigkeit, die ausreicht, um das Garn zu einer nachfolgenden Textilmaschine zu transportieren, noch immer verzugsfähig ist. Das Vorgarn kann also mit Hilfe einer Verzugseinrichtung, z. B. dem Streckwerk, einer das Vorgarn verarbeitenden Textilmaschine, beispielsweise einer Ringspinnmaschine, verzogen werden, bevor es endgültig zu einem herkömmlichen Garn versponnen wird.In general, within the meaning of the invention, the term roving (other name: roving) is to be understood as meaning a fiber structure in which at least some of the fibers are wound around an internal core. This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to pull the yarn to a subsequent To transport textile machine, is still warpable. The roving can thus using a default device, z. B. the drafting system, a textile machine processing the roving, for example a ring spinning machine, before it is finally spun into a conventional yarn.
Im Stand der Technik ist es nun üblich, das die Luftspinndüse verlassende Vorgarn auf eine Hülse aufzuspulen, so dass eine Spule (= mit Vorgarn bespulte Hülse) entsteht, die schließlich an die nachfolgende Textilmaschine weitergegeben wird. Eine entsprechende Vorspinnmaschine ist beispielsweise in der
Nächstliegender Stand der Technik
Aufgabe der vorliegenden Erfindung ist es, das bekannte Verfahren im Hinblick auf immer schneller arbeitende Textilmaschinen, die mit dem Vorgarn beliefert werden sollen, zu verbessern.It is the object of the present invention to improve the known method with regard to textile machines which are to be supplied with the roving and which are working ever faster.
Die Aufgabe wird gelöst durch ein Verfahren sowie eine Vorspinnmaschine mit den Merkmalen der unabhängigen Patentansprüche.The object is achieved by a method and a roving machine with the features of the independent patent claims.
Erfindungsgemäß zeichnet sich das Verfahren zum Verarbeiten eines strangförmigen Faserverbands nun dadurch aus, dass das die Luftspinndüse verlassende Vorgarn in oder auf eine Aufnahme abgelegt wird, die im Bereich der Vorspinnmaschine bereitgestellt ist. Im Gegensatz zum bekannten Stand der Technik wird das Vorgarn also nicht auf eine Hülse aufgewickelt, um eine Spule zu bilden. Vielmehr erfolgt eine lockere Ablage in oder auf die Aufnahme, aus der es nach dem Transport der Aufnahme an eine nachfolgende Textilmaschine wieder entnommen und weiterverarbeitet werden kann. Bei der Aufnahme handelt es sich vorzugsweise um ein Behältnis, besonders bevorzugt um ein nach oben hin offenes Behältnis, wie es in Spinnereien bekannt ist und das in der Regel als Spinnkanne bezeichnet wird. Die Spinnkanne kann hierbei in einer Draufsicht rund oder auch länglich, beispielsweise rechteckig, ausgebildet sein. Im Hinblick auf mögliche Formgebungen sei beispielsweise auf die
Entscheidend ist, dass das Vorgarn nicht, wie üblich, straff auf eine Hülse aufgewunden, sondern derart in oder auf die Aufnahme abgelegt wird, dass es nach der Ablage keiner Zugspannung mehr ausgesetzt ist. Vorzugsweise ist die Aufnahme als Behältnis ausgebildet, das ein Volumen von wenigstens 0,05 m3, vorzugsweise wenigstens 0,1 m3, besitzt. Da die Menge des im oder auf der Aufnahme abgelegten Vorgarns dem Vielfachen der Menge an Vorgarn entspricht, das auf eine Hülse aufgewickelt werden kann, kann das erfindungsgemäß abgelegte Vorgarn auch an Textilmaschinen weitergegeben werden, die einen hohen Vorgarnverbrauch aufweisen. Beispielsweise eigenen sich entsprechend befüllte Behältnisse hervorragend als Vorlage für eine herkömmliche Luftspinnmaschine, an der pro Spinnstelle mehrere hundert Meter Garn pro Minute produziert wird.The decisive factor is that the roving is not wound tightly onto a tube, as is usual, but is placed in or on the receptacle in such a way that it is no longer subjected to tensile stress after being placed. The receptacle is preferably designed as a container which has a volume of at least 0.05 m 3 , preferably at least 0.1 m 3 . Since the amount of roving deposited in or on the receptacle corresponds to the multiple of the amount of roving that can be wound onto a tube, the roving deposited according to the invention can also be passed on to textile machines that have a high roving consumption. For example, appropriately filled containers are ideal as templates for a conventional air-jet spinning machine, on which several hundred meters of yarn per minute are produced at each spinning position.
Vorzugsweise wird das Vorgarn derart in oder auf die Aufnahme abgelegt, dass das Vorgarn nach dem vollständigen Befüllen der Aufnahme eine mittlere Dichte von wenigstens 0,14 g/cm3, bevorzugt von wenigstens 0,15 g/cm3, besonders bevorzugt von wenigstens 0,16 g/cm3, aufweist.The roving is preferably placed in or on the receptacle in such a way that after the receptacle has been completely filled, the roving has an average density of at least 0.14 g/cm 3 , preferably at least 0.15 g/cm 3 , particularly preferably at least 0 .16 g/cm 3 .
Erfindungsgemäß wird das Vorgarn mit Hilfe einer Abzugsvorrichtung aus der Luftspinndüse abgezogen . Die Abzugsvorrichtung kann beispielsweise zwei korrespondierende und mit Hilfe eines Antriebs angetriebene Abzugswalzen umfassen, zwischen denen das Vorgarn nach dem Verlassen der Luftspinndüse klemmend geführt und in Richtung der Aufnahme geleitet wird. Nach Passieren der Abzugsvorrichtung gelangt das Vorgarn schließlich in den Bereich einer Ablagevorrichtung, wird von dieser erfasst und in oder auf die Aufnahme abgelegt. Die Ablagevorrichtung sorgt hierbei dafür, dass das Vorgarn in definierter und kontrollierter Weise in oder auf die Aufnahme gelangt, so dass Verknotungen oder für das spätere Entnehmen des Vorgarns von der Aufnahme ungünstige und undefinierte Überlappungen des Vorgarns vermieden werden. Vorzugsweise wird das Vorgarn mit Hilfe der Abzugsvorrichtung schlaufenförmig in oder auf die Aufnahme abgelegt, wobei die Schlaufen zumindest abschnittsweise eine Kreis- oder Ovalform haben können.According to the invention, the roving is drawn off from the air spinning nozzle with the aid of a drawing-off device. The take-off device can, for example, comprise two corresponding take-off rollers driven by a drive, between which the roving is clamped out after leaving the air spinning nozzle and directed in the direction of the recording. After passing the take-off device, the roving finally reaches the area of a depositing device, is grasped by it and deposited in or on the receptacle. The depositing device ensures that the roving gets into or onto the receptacle in a defined and controlled manner, so that knotting or unfavorable and undefined overlapping of the roving for later removal of the roving from the receptacle are avoided. The roving is preferably deposited in loops in or on the receptacle with the aid of the take-off device, it being possible for the loops to have a circular or oval shape at least in sections.
Die Ablagevorrichtung umfasst vorzugsweise einen Ablageteller mit einem Ablagekanal, durch den das Vorgarn während der Ablage geleitet wird, wobei der Ablageteller während der Ablage des Vorgarns vorzugsweise mit Hilfe eines Antriebs in eine Drehbewegung versetzt wird.The depositing device preferably comprises a depositing plate with a depositing channel through which the roving is guided during depositing, with the depositing plate being set in rotary motion during depositing of the roving, preferably with the aid of a drive.
Zusätzlich oder alternativ kann auch ein Drehteller vorhanden sein, auf dem sich die Aufnahme während der Ablage befindet und der während der Ablage des Vorgarns mit einem Antrieb angetrieben wird (wobei es sich bei dem Antrieb um denselben Antrieb handeln kann, der auch den Ablageteller antreibt, so dass beide Teller synchron angetrieben werden können).In addition or as an alternative, there can also be a turntable on which the receptacle is located during depositing and which is driven by a drive while the roving is deposited (whereby the drive can be the same drive that also drives the depositing plate, so that both plates can be driven synchronously).
Während eine Drehbewegung von Ablageteller und/oder Drehteller möglich ist, kann der Ablageteller und/oder der Drehteller auch mit Hilfe eines Antriebs angetrieben werden, der eine nicht-rotatorische Bewegung des entsprechenden Drehtellers und/oder des Ablagetellers bewirkt. Beispielsweise könnte insbesondere anstelle des Drehtellers ein sonstiges Bewegungselement vorgesehen sein, auf das die Aufnahme während der Ablage des Vorgarns abgestellt oder anderweitig gehalten wird und das auf einer Bewegungsbahn bewegt wird, die aus einzelnen linearen oder gekrümmten Abschnitten besteht oder diese umfasst, um ungewollte Drehungen des Vorgarns um seine Längsachse während der Ablage zu vermeiden. Insbesondere kann die Aufnahme ausschließlich oder teilweise translatorisch bewegt werden.While a rotational movement of the storage plate and/or the turntable is possible, the storage plate and/or the turntable can also be driven with the aid of a drive which causes a non-rotary movement of the corresponding turntable and/or the storage plate. For example, instead of the turntable, another movement element could be provided, on which the receptacle is placed or otherwise held while the roving is being deposited and which is moved on a movement path that consists of or includes individual linear or curved sections in order to prevent unwanted rotations of the roving around its longitudinal axis during filing. In particular, the recording can be moved exclusively or partially in a translatory manner.
Ferner ist es denkbar, dass die Aufnahme abwechselnd in eine erste und eine entgegengesetzte zweite Richtung gedreht wird. Beispielsweise könnte die Aufnahme abwechselnd um 360° im Uhrzeigersinn und anschließend um den gleichen Betrag gegen den Uhrzeigersinn gedreht werden, um ungewollte Drehungen des abgelegten Vorgarns zu vermeiden. Ebenso könnten zwei Ablageteller vorhanden sein, die das Vorgarn aus zwei nebeneinander angeordneten Luftspinndüsen in oder auf eine gemeinsame Aufnahme ablegt. Die Ablageteller könnten sich auch in diesem Fall abwechselnd in entgegengesetzte Drehrichtungen drehen, wobei hier ein Winkelbereich von 180° von Vorteil wäre.Furthermore, it is conceivable that the recording is alternately rotated in a first and an opposite second direction. For example, the receptacle could be alternately rotated 360° clockwise and then counterclockwise by the same amount to avoid unwanted rotations of the laid roving. Likewise, two storage plates could be present, which deposits the roving from two air spinning nozzles arranged next to one another in or on a common receptacle. In this case, too, the storage plates could rotate alternately in opposite directions, with an angular range of 180° being advantageous here.
Gemäß einer Ausführungsform, die nicht unter den Anspruchsgegenstand fällt, wird das Vorgarn nach Passieren der Abzugsvorrichtung unmittelbar von der Ablagevorrichtung erfasst und in oder auf die Aufnahme abgelegt.According to one embodiment, which does not fall under the subject matter of the claim, the roving, after passing the take-off device, is immediately grasped by the depositing device and deposited in or on the receptacle.
Zwischen der Abzugsvorrichtung und der Ablagevorrichtungen sind in diesem Fall keine weiteren Elemente vorhanden, die das Vorgarn durch direkten Kontakt führen. Selbstverständlich können zwischen der Abzugsvorrichtung und der Ablagevorrichtung ein oder mehrere Sensoren angeordnet sein, die das Vorgarn auf dessen Qualität (Dicke, Haarigkeit, etc.) überwachen oder überwachen, ob überhaupt Vorgarn aus der Luftspinndüse austritt und/oder in den Bereich der Ablagevorrichtung gelangt oder die den Verlauf des Vorgarns überwachen.In this case, there are no further elements between the take-off device and the depositing devices that guide the roving through direct contact. Of course, one or more sensors can be arranged between the take-off device and the depositing device, which monitor the quality of the roving (thickness, hairiness, etc.) or monitor whether roving emerges from the air spinning nozzle at all and/or enters the area of the depositing device or which monitor the course of the roving.
Erfindungsgemäß bildet das Vorgarn zwischen der Abzugsvorrichtung und der Ablagevorrichtung einen Durchhang, dessen vertikale räumliche Ausdehnung über die Ablagegeschwindigkeit der Ablagevorrichtung reguliert wird. Das Vorgarn beschreibt also beispielsweise zwischen der Luftspinndüse bzw. der Abzugsvorrichtung und der Ablagevorrichtung bzw. einer dieser vorgelagerten Führung (z. B. einer Führungsrolle) eine Parabel. Übersteigt bzw. erreicht die vertikale räumliche Ausdehnung einen vorgegebenen Maximalwert, so wird die Ablagegeschwindigkeit erhöht. Unterschreitet bzw. erreicht die vertikale räumliche Ausdehnung einen vorgegebenen Minimalwert, so wird die Ablagegeschwindigkeit verringert, wobei die Geschwindigkeit der Ablage beispielsweise durch Änderung der Drehgeschwindigkeit des Ablagetellers und/oder des Drehtellers erhöht bzw. verringert wird und wobei die Änderung vorzugsweise durch eine Steuerung der Vorspinnmaschine automatisch vorgenommen wird.According to the invention, the roving forms a slack between the take-off device and the depositing device, the vertical spatial extent of which is regulated via the depositing speed of the depositing device. The roving thus describes a parabola, for example, between the air spinning nozzle or the take-off device and the depositing device or a guide located in front of it (e.g. a guide roller). If the vertical spatial extension exceeds or reaches a predetermined maximum value, the depositing speed is increased. If the vertical spatial extent falls below or reaches a predetermined minimum value, the depositing speed is reduced, the depositing speed being increased or decreased, for example, by changing the rotational speed of the depositing plate and/or the turntable, and the change preferably being effected by a Control of the roving machine is made automatically.
Schließlich ist es auch denkbar, dass das Vorgarn zwischen der Abzugsvorrichtung und der Ablagevorrichtung über eine Führung geführt wird. Die Führung kann beispielsweise als Förderband oder als länglicher Kanal ausgebildet sein, wobei eine oder mehrere Düsen vorhanden sein könnten, die mit einer Druckluftversorgung in Verbindung stehen, um das Vorgarn mit Hilfe von Druckluft in Richtung der Ablagevorrichtung führen oder durch die Führung bewegen zu können. Auch können die Düsen durch die von ihr ausgehende Luftströmung als Einfädelhilfe dienen, um das Vorgarn nach Verlassen der Abzugsvorrichtung bzw. der Luftspinndüse in oder auf die Führung zu bewegen.Finally, it is also conceivable that the roving is guided via a guide between the take-off device and the depositing device. The guide may be in the form of a conveyor belt or an elongate channel, for example, and there could be one or more nozzles connected to a compressed air supply to direct the roving towards the laying device or through the guide with the aid of compressed air. The nozzles can also serve as a threading aid due to the air flow emanating from them, in order to move the roving into or onto the guide after it has left the draw-off device or the air spinning nozzle.
In der Regel wird der Normalbetrieb der Vorspinnmaschine (während dessen Vorgarn produziert und in oder auf die Aufnahme abgelegt wird) von Stoppphasen unterbrochen, in der kein Vorgarn von der Luftspinndüse produziert wird. Gründe hierfür sind beispielsweise ein Reißen des Vorgarns, ein Problem bei der Zufuhr des Faserverbands oder ein Verstopfen der Luftspinndüse. Es ist erfindungsgemäß vorgesehen, dass zwischen einer solchen Stoppphase und dem nachfolgenden Normalbetrieb eine Startphase durchlaufen wird. Die Startphase zeichnet sich dadurch aus, dass die Herstellung des Vorgarns wieder aufgenommen wird, wobei während der Startphase das von der Luftspinndüse produzierte Vorgarn nach Verlassen der Luftspinndüse zumindest zeitweise nicht in oder auf die Aufnahme abgelegt, sondern über eine Vorgarnabfuhr entsorgt wird. Bei der Vorgarnabfuhr kann es sich beispielsweise um ein mit Unterdruck beaufschlagtes Saugelement (z. B. ein Saugrohr) handeln. In jedem Fall ist es von Vorteil, wenn ein Anfangsabschnitt des beim Wiederaufnehmen der Vorgarnproduktion hergestellten Vorgarns nicht auf oder in die Aufnahme gelangt, da die Qualität des Anfangsabschnitts in der Regel nicht den Vorgaben entspricht. Wurde eine bestimmte Menge/Länge an Vorgarn während der Startphase abgeführt, wird die Vorgarnabfuhr deaktiviert oder umgangen (z. B. durch eine Weiche, die den Verlauf des Vorgarns beeinflusst), so dass das anschließend produzierte Vorgarn in oder auf die Aufnahme gelangt, wobei das in oder auf die Aufnahme gelangende Vorgarn von dem abgeführten Vorgarnabschnitt getrennt wird (um zu vermeiden, dass dieses letztendlich doch in oder auf die Aufnahme gelangt).As a rule, the normal operation of the roving machine (during which roving is produced and deposited in or on the take-up) is interrupted by stop phases in which no roving is produced by the air spinning nozzle. Reasons for this are, for example, tearing of the roving, a problem in feeding the fiber structure or clogging of the air spinning nozzle. It is provided according to the invention that a start phase is run through between such a stop phase and the subsequent normal operation. The starting phase is characterized by the fact that the production of the roving is resumed, with the roving produced by the air spinning nozzle during the starting phase being at least temporarily not deposited in or on the receptacle after leaving the air spinning nozzle, but being disposed of via a roving discharge. The roving removal can be, for example, a suction element (e.g. a suction tube) to which negative pressure is applied. In any case, it is advantageous if an initial section of the roving produced when roving production is resumed does not get onto or into the receptacle, since the quality of the initial section generally does not correspond to the specifications. If a certain quantity/length of roving was removed during the starting phase, the roving removal is deactivated or bypassed (e.g. by a switch that influences the course of the roving), so that the roving produced subsequently gets into or onto the receptacle, whereby the roving going into or onto the take-up is separated from the discharged roving section (to avoid that this ends up going into or onto the take-up).
Besondere Vorteile bringt es mit sich, wenn dann, wenn die Aufnahme einen definierten Füllgrad erreicht hat oder wenn eine definierte Vorgarnmenge oder Vorgarnlänge von der Luftspinndüse produziert und in oder auf die Aufnahme abgelegt wurde, ein Aufnahmewechselvorgang durchgeführt wird. Die Vorgarnmenge oder Vorgarnlänge bzw. der genannte Füllgrad können mit Hilfe eines oder mehrerer Sensoren überwacht werden. In jedem Fall wird nach Erreichen entsprechender Sollwerte die bis zu diesem Zeitpunkt befüllte Aufnahme durch eine leere Aufnahme ersetzt. Der Wechselvorgang kann hierbei automatisch mit Hilfe einer Aufnahmewechseleinrichtung der Vorspinnmaschine oder aber auch manuell durch einen Bediener durchgeführt werden.It has particular advantages when the recording has a defined Filling level has been reached or when a defined roving quantity or roving length has been produced by the air spinning nozzle and placed in or on the receptacle, a receptacle changing process is carried out. The amount of roving or length of roving or the degree of filling mentioned can be monitored with the aid of one or more sensors. In any case, after the corresponding target values have been reached, the receptacle that has been filled up to this point in time is replaced by an empty receptacle. The changing process can be carried out automatically with the aid of a take-up changing device on the roving machine or else manually by an operator.
Vorteile bringt es zudem mit sich, wenn die Herstellung des Vorgarns während des Aufnahmewechselvorgangs nicht gestoppt wird. Mit anderen Worten sollte also während des Aufnahmewechselvorgangs Vorgarn durch die Luftspinnmaschine produziert werden. Das produzierte Vorgarn wird also vor dem Aufnahmewechselvorgang in oder auf eine erste Aufnahme abgelegt. Während oder nach dem Aufnahmewechselvorgang erfolgt die Vorgarnablage schließlich in oder auf die zweite Aufnahme, wobei die entsprechenden Aufnahmen unter der stets an derselben Stelle verbleibenden Luftspinndüse verschoben werden (beispielsweise durch die oben genannte Aufnahmewechseleinrichtung). Eine nach dem Aufnahmewechselvorgang zwischen den beiden Aufnahmen vorhandene Vorgarnschleife muss schließlich durchtrennt werden, um die volle Aufnahme unabhängig vom Befüllen der neuen Aufnahme von der Vorspinnmaschine entfernen zu können.There are also advantages if the production of the roving is not stopped during the take-up change process. In other words, roving should be produced by the air-jet spinning machine during the take-up changing process. The roving produced is thus placed in or on a first receptacle before the receptacle changing process. During or after the take-up changing process, the roving is deposited in or on the second take-up, with the corresponding take-ups being shifted under the air spinning nozzle, which always remains in the same place (e.g. by the above-mentioned take-up changing device). A roving loop present between the two recordings after the recording changeover process must finally be severed in order to be able to remove the full recording from the roving machine independently of the filling of the new recording.
Besonders vorteilhaft ist es, wenn das während des Aufnahmewechselvorgangs von der Luftspinndüse hergestellte Vorgarn zumindest abschnittsweise über eine Vorgarnabfuhr entsorgt wird. Das Vorgarn wird also kontinuierlich während des Aufnahmewechselvorgangs hergestellt, gelangt hierbei vor dem Aufnahmewechselvorgang in oder auf eine erste Aufnahme und nach bzw. bereits während des Aufnahmewechselvorgangs in oder auf eine zweite Aufnahme. Zwischenzeitlich erfolgt die Abfuhr des die Luftspinndüse verlassenden Vorgarns über die Vorgarnabfuhr, wobei zuvor der sich in oder auf der ersten Aufnahme befindliche Vorgarnabschnitt abgetrennt wird. Nach dem Ende des Abfuhrvorgangs wird das die Luftspinndüse verlassende Vorgarn schließlich wieder der Ablagevorrichtung zugeführt, die das Vorgarn in oder auf die oben genannte zweite Aufnahme ablegt. Vorzugsweise wird die Menge des pro Zeiteinheit von der Luftspinndüse produzierten Vorgarns während des Aufnahmewechselvorgangs bzw. während der Zeit, in der das Vorgarn über die Vorgarnabfuhr entsorgt wird, zumindest zeitweise gegenüber dem Normalbetrieb gedrosselt, um die Menge des entsorgten Vorgarns zu minimieren.It is particularly advantageous if the roving produced by the air spinning nozzle during the take-up changing process is disposed of at least in sections via a roving discharge. The roving is thus produced continuously during the recording change process, getting into or onto a first recording before the recording changing process and after or already during the recording changing process in or onto a second recording. In the meantime, the roving leaving the air spinning nozzle is discharged via the roving discharge, with the roving section located in or on the first receptacle being separated beforehand. After the end of the discharge process, the roving leaving the air spinning nozzle is finally fed back to the depositing device, which deposits the roving in or on the above-mentioned second recording. Preferably, the amount of roving produced per unit of time by the air spinning nozzle is throttled at least temporarily compared to normal operation during the take-up changing process or during the time in which the roving is disposed of via the roving discharge, in order to minimize the amount of roving disposed of.
Ebenso ist es vorteilhaft, wenn die Herstellung des Vorgarns während oder vor dem Aufnahmewechselvorgangs zeitweise unterbrochen wird. Dies kann entweder durch einen Stopp der Zufuhr des Faserverbands in die Luftspinndüse oder die Unterbrechung der Luftzufuhr derselben erfolgen. In jedem Fall erfolgt ein Stopp der Vorgarnherstellung. Wurde die zuvor befüllte Aufnahme durch eine leere Aufnahme ersetzt, so kann die Vorgarnherstellung wieder fortgesetzt werden, wobei es prinzipiell von Vorteil ist, wenn die Ablagevorrichtung bereits in Bewegung, z. B. in Drehung, versetzt wird, bevor das Vorgarn die Ablagevorrichtung erreicht.It is also advantageous if the production of the roving is temporarily interrupted during or before the take-up changing process. This can be done either by stopping the feed of the fiber structure into the air spinning nozzle or by interrupting the air supply to the same. In any case, the roving production is stopped. If the previously filled recording was replaced by an empty recording, the roving production can be continued again, it being advantageous in principle if the depositing device is already in motion, z. B. in rotation, is offset before the roving reaches the storage device.
Denkbar ist auch, die Vorgarnherstellung bereits während des Austauschs der genannten Aufnahmen wieder zu beginnen und den Anfangsabschnitt des dann hergestellten Vorgarns eine gewisse Zeit lang über die Vorgarnabfuhr abzuführen, bevor wieder Vorgarn in oder auf die anfangs leere Aufnahme abgelegt wird. Besonders vorteilhaft ist es also, wenn nach der Unterbrechung der Vorgarnherstellung eine Startphase durchlaufen wird, während der das von der Luftspinndüse produzierte Vorgarn nach Verlassen der Luftspinndüse zumindest zeitweise nicht in oder auf die Aufnahme abgelegt, sondern über eine Vorgarnabfuhr entsorgt wird.It is also conceivable to start roving production again during the exchange of said receptacles and to discharge the initial section of the roving then produced via the roving discharge for a certain period of time before roving is again deposited in or on the initially empty receptacle. It is therefore particularly advantageous if, after the production of roving has been interrupted, a start phase is run through during which the roving produced by the air spinning nozzle is at least temporarily not deposited in or on the receptacle after leaving the air spinning nozzle, but is instead disposed of via a roving discharge.
Besondere Vorteile bringt es mit sich, wenn die Aufnahme nach ihrer teilweisen oder vollständigen Befüllung mit Vorgarn zu einer der Herstellung von herkömmlichem Garn dienenden Luftspinnmaschine bewegt wird, wobei das in oder auf der Aufnahme vorhandene Vorgarn mit Hilfe der Luftspinnmaschine zu einem Garn versponnen wird. Die befüllte Aufnahme dient also als Vorlage für die Luftspinnmaschine, die ebenfalls mit Hilfe einer Wirbelluftströmung aus dem Vorgarn ein herkömmliches Garn herstellt, das schließlich beispielsweise mit Hilfe einer Webmaschine zu einem Stoff verarbeitet werden kann. Entsprechende Luftspinnmaschinen sind im Stand der Technik hinlänglich bekannt und umfassen in der Regel eine Vielzahl von Spinnstellen mit jeweils einem Streckwerk zum Verziehen des Vorgarns, einer nachgeordneten Luftspinndüse zur Erteilung der gewünschten Drehung und damit zur Herstellung des Garns sowie einer Spuleinheit zum Aufspulen des die Luftspinndüse verlassenden Garns.There are particular advantages if the receptacle is moved to an air-jet spinning machine used for the production of conventional yarn after it has been partially or completely filled with roving, the roving present in or on the receptacle being spun into a yarn using the air-jet spinning machine. The filled receptacle thus serves as a template for the air-jet spinning machine, which also uses a turbulent air flow to produce a conventional yarn from the roving, which can finally be processed into a fabric, for example with the help of a weaving machine. Corresponding air spinning machines are sufficient in the prior art are known and generally include a large number of spinning positions, each with a drafting system for drawing the roving, a downstream air spinning nozzle for imparting the desired twist and thus for producing the yarn, and a winding unit for winding the yarn leaving the air spinning nozzle.
Ebenso ist es vorteilhaft, wenn die Aufnahme nach ihrer teilweisen oder vollständigen Befüllung mit Vorgarn zu einer der Herstellung eines Gestricks dienenden Spinnstrickmaschine bewegt wird, wobei aus dem in oder auf der Aufnahme vorhandenen Vorgarn mit Hilfe der Spinnstrickmaschine ein Gestrick hergestellt wird. Eine Spinnstrickmaschine umfasst in der Regel ebenfalls ein Streckwerk zum Verziehen des Vorgarns. Ferner ist eine Dralleinheit vorhanden, die dem verzogenen Vorgarn eine leichte Drehung erteilt, so dass es zu einer Strickeinheit der Spinnstrickmaschine transportiert werden kann. Die Strickeinheit verarbeitet das verzogene Vorgarn schließlich zu einem Gestrick. Generell kann sich die Strickeinheit der Spinnstrickmaschine wenige Zentimeter bis mehrere Meter entfernt von der Dralleinheit entfernt befinden. Liegt diese Entfernung über einem zuvor festgelegten Maximalwert, so kann es von Vorteil sein, das Material mit einem oder mehreren Filamenten auszustatten, wobei das Filament im Bereich des Streckwerks oder der Dralleinheit in den Materialfluss eingebracht werden kann und so eine Art Core-Garn entsteht.It is also advantageous if the receptacle, after it has been partially or completely filled with roving, is moved to a spinning and knitting machine used to produce a knitted fabric, with a knitted fabric being produced from the roving present in or on the receptacle using the spinning and knitting machine. A spinning and knitting machine usually also includes a drafting system for warping the roving. There is also a twisting unit that gives the warped roving a slight twist so that it can be transported to a knitting unit of the spin-knitting machine. Finally, the knitting unit processes the warped roving into a knitted fabric. In general, the knitting unit of the spin-knitting machine can be located a few centimeters to several meters away from the twisting unit. If this distance is above a predetermined maximum value, it can be advantageous to equip the material with one or more filaments, whereby the filament can be introduced into the material flow in the area of the drafting system or the twist unit, thus creating a kind of core yarn.
Die erfindungsgemäße Vorspinnmaschine zur Herstellung eines Vorgarns aus einem strangförmigen Faserverband umfasst zumindest eine Luftspinndüse zur Herstellung von Vorgarn aus dem der Luftspinndüse zugeführten Faserverband, wobei die Luftspinndüse ausgebildet ist, dem Faserverband innerhalb der Luftspinndüse mit Hilfe einer durch Luftdüsen der Luftspinndüse erzeugten Wirbelluftströmung eine Drehung zu erteilen, so dass aus dem Faserverband ein Vorgarn gebildet wird, und wobei die Luftspinndüse einen Auslass aufweist, über den das Vorgarn die Luftspinndüse beim Betrieb derselben verlässt, wobei die Vorspinnmaschine eine Ablagevorrichtung umfasst, mit deren Hilfe das die Luftspinndüse verlassende Vorgarn in oder auf eine Aufnahme ablegbar ist, und wobei die Vorspinnmaschine eine Vorgarnabfuhr zur zumindest zeitweisen Entsorgung des von der Luftspinndüse produzierten Vorgarns nach Verlassen der Luftspinndüse aufweist, und wobei die Vorspinnmaschine eine Abzugsvorrichtung zum Abziehen des Vorgarns aus der Luftspinndüse umfasst.The roving machine according to the invention for producing a roving from a strand-like fiber structure comprises at least one air spinning nozzle for producing roving from the fiber structure fed to the air spinning nozzle, wherein the air spinning nozzle is designed to impart a rotation to the fiber structure within the air spinning nozzle with the aid of a turbulent air flow generated by air nozzles of the air spinning nozzle , so that a roving is formed from the fiber structure, and wherein the air spinning nozzle has an outlet via which the roving leaves the air spinning nozzle during operation of the same, wherein the roving machine comprises a depositing device, with the help of which the roving leaving the air spinning nozzle into or onto a receptacle can be deposited, and wherein the roving machine has a roving discharge for at least temporary disposal of the roving produced by the air-jet spinning nozzle after leaving the air-spinning nozzle, and wherein the roving machine has a take-off device for drawing off the Includes roving from the air spinneret.
Die Vorspinnmaschine umfasst eine Steuerung oder steht mit einer Steuerung in Verbindung, die ausgebildet ist, die Vorspinnmaschine gemäß dem bisherig beschriebenen Verfahren zu betreiben.The roving machine includes a controller or is connected to a controller that is designed to operate the roving machine according to the method described above.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigen, jeweils schematisch:
- Fig. 1
- ausgewählte Elemente einer Vorspinnmaschine in der Seitenansicht,
- Fig. 2
- eine Schnittdarstellung eines Ausschnitts einer Luftspinndüse einer erfindungsgemäßen Vorspinnmaschine, und
- Fig. 3
- ausgewählte Elemente einer erfindungsgemäßen Vorspinnmaschine in der Seitenansicht sowie eine Draufsicht auf eine als Behältnis ausgebildete Aufnahme mit Vorgarn.
- 1
- selected elements of a roving machine in side view,
- 2
- a sectional view of a section of an air spinning nozzle of a roving machine according to the invention, and
- 3
- selected elements of a roving machine according to the invention in side view and a plan view of a receptacle designed as a receptacle with roving.
Die Vorspinnmaschine kann bei Bedarf ein Streckwerk mit mehreren, jeweils um eine Drehachse drehbare, Streckwerkswalzen 15 umfassen (nur zwei der sechs Streckwerkswalzen 15 sind mit einem Bezugszeichen versehen), wobei das Streckwerk während des Spinnbetriebs mit einem Faserverband 1, beispielsweise in Form eines doublierten Streckenbands, beliefert wird.If required, the roving machine can include a drafting system with several
Ferner umfasst die gezeigte Vorspinnmaschine eine oder mehrere benachbart zueinander angeordneten Luftspinndüsen 2 mit jeweils einer innenliegenden Wirbelkammer 23 (siehe
Darüber hinaus umfasst die Vorspinnmaschine eine Abzugsvorrichtung 6, vorzugsweise mit mehreren zusammenwirkenden Abzugswalzen 16, mit deren Hilfe das die Spinndüse über deren Auslass 4 verlassende Vorgarn 3 erfasst und geführt wird (die Abzugswalzen 16 sind vorzugsweise mit Hilfe eines nicht gezeigten Antriebs in eine Drehbewegung versetzbar). Die Vorspinnmaschine muss nicht zwangsweise ein Streckwerk aufweisen, wie dies in den
In jedem Fall arbeitet die Vorspinnmaschine nach einem Luftspinnverfahren. Zur Bildung des Vorgarns 3 wird der Faserverband 1 über einen Einlass 13 der Luftspinndüse 2, in dem vorzugsweise ein so genanntes Faserführungselement 14 angeordnet ist, in die Wirbelkammer 23 der Luftspinndüse 2 geführt (siehe auch
Generell sei an dieser Stelle klargestellt, dass es sich bei dem hergestellten Vorgarn 3 um ein Garn mit einem relativ geringen Anteil an Umwindefasern, bzw. um ein Garn, bei dem die Umwindefasern relativ locker um den inneren Kern geschlungen sind, handelt, so dass das Vorgarn 3 verzugsfähig bleibt. Dies ist entscheidend, da das hergestellte Vorgarn 3 an einer nachfolgenden Textilmaschine (beispielsweise einer herkömmlichen Luftspinnmaschine) nochmals mit Hilfe eines Streckwerks verzogen werden muss, um zu einem herkömmlichen Garn weiterverarbeitet werden zu können, das beispielsweise auf einer Webmaschine zu einem Stoff verarbeitet werden kann.In general, it should be made clear at this point that the roving 3 produced is a yarn with a relatively small proportion of twisted fibers, or a yarn in which the twisted fibers are wrapped relatively loosely around the inner core, so that the
Der Kern der vorliegenden Erfindung ist nun den
Im Gegensatz hierzu schlägt die vorliegende Erfindung nun vor, das Vorgarn 3 nach Verlassen der Luftspinndüse 2 lose in eine als Behältnis ausgebildete Aufnahme 5 abzulegen, wobei hierbei vorzugsweise die in Spinnereien bekannten Spinnkannen zum Einsatz kommen können.In contrast to this, the present invention now proposes loosely depositing the roving 3 after leaving the
Wie unter anderem
Der Ablageteller 18 ist mit Hilfe eines nicht gezeigten Antriebs in eine Drehbewegung versetzbar, um das von der Luftspinndüse 2 stammende Vorgarn 3 schlaufenförmig in die Aufnahme 5 ablegen zu können.The depositing
Alternativ oder zusätzlich kann die Ablagevorrichtung 7 auch einen in
Wird sowohl der Drehteller 19 als auch der Ablageteller 18 (der im Fall von
Wie ein Vergleich der
Erfindungsgemäß bildet das Vorgarn 3 zunächst einen Durchhang 8 und wird dann dem Ablageteller 18 zugeführt, wobei zwischen Ablageteller 18 und Abzugsvorrichtung 6 ein oder mehrere Sensoren 17 und oder eine zusätzliche Führung 20, z. B. in Form einer Führungsrolle, vorhanden sein können. Der oder die Sensoren 17 überwachen die vertikale Ausdehnung des Durchhangs 8, wobei eine nicht gezeigte Steuerung auf Basis der Messwerte des oder der Sensoren 17, wie oben beschrieben, die Drehgeschwindigkeit des Drehtellers 19 und/oder des Ablagetellers 18 regulieren, um die vertikale Ausdehnung in einem definierten Bereich zu halten.According to the invention, the roving 3 first forms a
Schließlich zeigt
Hinsichtlich möglicher Aufnahmewechselvorgänge wird auf die obige Beschreibung verwiesen.With regard to possible recording change processes, reference is made to the above description.
- 11
- Faserverbandfiber bandage
- 22
- Luftspinndüseair spinneret
- 33
- Vorgarnroving
- 44
- Auslassoutlet
- 55
- Aufnahmerecording
- 66
- Abzugsvorrichtungtrigger device
- 77
- Ablagevorrichtungstorage device
- 88th
- Durchhangsag
- 99
- Vorgarnabfuhrroving discharge
- 1010
- Luftdüseair nozzle
- 1111
- Garnbildungselementyarn forming element
- 1212
- Abzugskanalculvert
- 1313
- Einlassinlet
- 1414
- Faserführungselementfiber guiding element
- 1515
- Streckwerkswalzedrafting roller
- 1616
- Abzugswalzepull-off roller
- 1717
- Sensorsensor
- 1818
- Ablagetellertray
- 1919
- Drehtellerturntable
- 2020
- Führungguide
- 2121
- Ablagekanalstorage channel
- 2222
- Schlaufeloop
- 2323
- Wirbelkammervortex chamber
Claims (9)
- A method for processing a strand-shaped fiber bundle (1),- wherein the fiber bundle (1) is sent to an air-jet spinning nozzle (2) of a roving frame machine serving to produce roving (3),- wherein during normal operation of the air-jet spinning nozzle (2) a twist is imparted to the fiber bundle (1) within the air-jet spinning nozzle (2) with the aid of a vortex air stream, so that a roving (3) is formed from the fiber bundle (1), and- wherein the roving (3) finally leaves the air-jet spinning nozzle (2) via an outlet (4) of the air-jet spinning nozzle (2), andwherein the roving (3) leaving the air-jet spinning nozzle (2) is deposited in or on a receptacle (5) provided in the region of the roving frame machine,- wherein the roving (3) is pulled out of the air-jet spinning nozzle (2) with the aid of a draw-off device (6),characterized in thatnormal operation is interrupted by stop phases in which no roving (3) is produced by the air-jet spinning nozzle (2), andin that a start phase is passed through between a stop phase and subsequent normal operation, while the roving (3) produced by the air-jet spinning nozzle (2) is at least temporarily not deposited in or on the receptacle (5) after leaving the air-jet spinning nozzle (2), but is disposed of by means of a roving removal device (9), and in that with the aid of a deposition device (7) the roving (3) is deposited in or on the receptacle (5), and in that the roving (3) forms a sag (8) between the draw-off device (6) and the deposition device (7), the vertical spatial extension of which is regulated via the deposition speed of the deposition device (7).
- The method according to the preceding claim, characterized in that when the receptacle (5) has reached a defined fill level or when a defined amount of roving or length of roving has been produced by the air-jet spinning nozzle (2) and has been deposited in or on the receptacle (5), a receptacle-changing process is carried out during which the filled receptacle (5) is replaced by an empty receptacle (5).
- The method according to the preceding claim, characterized in that production of the roving (3) is not stopped during the receptacle-changing process.
- The method according to Claims 2 or 3, characterized in that the roving (3) produced by the air-jet spinning nozzle (2) during the receptacle-changing process is disposed of at least in sections via a roving removal device (9).
- The method according to Claims 2 or 4, characterized in that production of the roving (3) is temporarily interrupted during the receptacle-changing process.
- The method according to the preceding claim, characterized in that after the interruption of roving production a start phase is passed through, while the roving (3) produced by the air-jet spinning nozzle (2) is at least temporarily not deposited in or on the receptacle (5) after leaving the air-jet spinning nozzle (2), but is disposed of via a roving removal device (9).
- The method according to any one of the preceding claims, characterized in that the receptacle (5), after its partial or complete filling with roving (3), is moved to an air-jet spinning machine serving to produce yarn, and in that the roving (3) present in or on the receptacle (5) is spun with the aid of the air-jet spinning machine to form a yarn.
- The method according to any one of Claims 1 to 7, characterized in that the receptacle (5) after its partial or complete filling with roving (3) is moved to a spinning knitting machine serving to produce a knitted fabric, and in that with the aid of the spinning knitting machine a knitted fabric is produced from the roving (3) present in or on the receptacle (5).
- A roving frame machine for producing a roving (3) from a strand-shaped fiber bundle (1),- wherein the roving frame machine comprises at least one air-jet spinning nozzle (2) for producing roving (3) from the fiber bundle (1) fed to the air-jet spinning nozzle (2),- wherein the air-jet spinning nozzle (2) is designed to impart a twist to the fiber bundle (1) within the air-jet spinning nozzle (2) with the aid of a vortex air stream generated by air nozzles (10) of the air-jet spinning nozzle (2), so that a roving (3) is formed from the fiber bundle (1), and- wherein the air-jet spinning nozzle (2) has an outlet (4) via which the roving (3) leaves the air-jet spinning nozzle (2) during operation thereof,wherein the roving frame machine comprises a deposition device (7) by means of which the roving (3) leaving the air-jet spinning nozzle (2) can be deposited in or on a receptacle (5), and wherein the roving frame machine has a roving removal device (9) for at least temporarily disposing of the roving (3) produced by the air-jet spinning nozzle (2) after leaving the air-jet spinning nozzle (2), and wherein the roving frame machine comprises a draw-off device (6) for pulling the roving (3) out of the air-jet spinning nozzle (2)
characterized in that the roving frame machine comprises a controller or is connected to a controller that is designed to operate the roving frame machine according to any one of Claims 1 to 6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CH00893/16A CH712663A1 (en) | 2016-07-14 | 2016-07-14 | Process for processing a strand-like fiber composite and roving machine. |
PCT/IB2017/053823 WO2018011655A1 (en) | 2016-07-14 | 2017-06-27 | Method for processing a strand-shaped fiber sliver, and roving frame machine |
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EP3484801A1 EP3484801A1 (en) | 2019-05-22 |
EP3484801B1 true EP3484801B1 (en) | 2022-08-17 |
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EP17740114.8A Active EP3484801B1 (en) | 2016-07-14 | 2017-06-27 | Method for processing a strand-shaped fiber sliver, and roving frame machine |
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US (1) | US10837128B2 (en) |
EP (1) | EP3484801B1 (en) |
JP (1) | JP2019525017A (en) |
CN (1) | CN109415180B (en) |
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CH709693A1 (en) * | 2014-05-26 | 2015-11-30 | Rieter Ag Maschf | A method for operating a textile machine and the textile machine for the production of roving. |
CH709748A1 (en) * | 2014-06-12 | 2015-12-15 | Rieter Ag Maschf | Air-jet spinning machine and method for operating such. |
CH709749A1 (en) * | 2014-06-12 | 2015-12-15 | Rieter Ag Maschf | Air-jet spinning machine and method for operating such. |
CH709953A1 (en) * | 2014-07-30 | 2016-02-15 | Rieter Ag Maschf | Method for operating an air spinning machine. |
DE102015120437A1 (en) * | 2015-11-25 | 2017-06-01 | Maschinenfabrik Rieter Ag | Air-jet spinning machine and method for operating the same |
CH712409A1 (en) * | 2016-04-29 | 2017-10-31 | Rieter Ag Maschf | Air-jet spinning machine and method for producing a yarn. |
CH712489A1 (en) * | 2016-05-26 | 2017-11-30 | Rieter Ag Maschf | Garnbildungselement for a roving and equipped therewith roving. |
CZ2016708A3 (en) * | 2016-11-14 | 2018-06-06 | Rieter Cz S.R.O. | A method of defined placement of the yarn end on the bobbin |
-
2016
- 2016-07-14 CH CH00893/16A patent/CH712663A1/en not_active Application Discontinuation
-
2017
- 2017-06-27 CN CN201780043361.6A patent/CN109415180B/en active Active
- 2017-06-27 JP JP2019501676A patent/JP2019525017A/en active Pending
- 2017-06-27 WO PCT/IB2017/053823 patent/WO2018011655A1/en unknown
- 2017-06-27 US US16/316,780 patent/US10837128B2/en active Active
- 2017-06-27 EP EP17740114.8A patent/EP3484801B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0412256A1 (en) * | 1989-08-07 | 1991-02-13 | TRÜTZSCHLER GMBH & CO. KG | Method and arrangement for automatically piecing |
Also Published As
Publication number | Publication date |
---|---|
US20200181810A1 (en) | 2020-06-11 |
EP3484801A1 (en) | 2019-05-22 |
CN109415180A (en) | 2019-03-01 |
JP2019525017A (en) | 2019-09-05 |
CH712663A1 (en) | 2018-01-15 |
US10837128B2 (en) | 2020-11-17 |
WO2018011655A1 (en) | 2018-01-18 |
CN109415180B (en) | 2021-12-10 |
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