EP1695934B1 - Procédé pour alimenter des bandes fibreuses dans une machine de tricotage - Google Patents

Procédé pour alimenter des bandes fibreuses dans une machine de tricotage Download PDF

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Publication number
EP1695934B1
EP1695934B1 EP05020637A EP05020637A EP1695934B1 EP 1695934 B1 EP1695934 B1 EP 1695934B1 EP 05020637 A EP05020637 A EP 05020637A EP 05020637 A EP05020637 A EP 05020637A EP 1695934 B1 EP1695934 B1 EP 1695934B1
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EP
European Patent Office
Prior art keywords
band
sliver
bobbin
heating
fiber
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.)
Active
Application number
EP05020637A
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German (de)
English (en)
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EP1695934A3 (fr
EP1695934A2 (fr
Inventor
Karl-Heinz Kinder
Wolfgang Pester
Gottfried Roth
Dietmar Reuchsel
Frank Schubert
Frank Vettermann
Alexander Wegner
Astrid Kirchberg
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.)
Karl Mayer Textilmaschinenfabrik GmbH
Original Assignee
Karl Mayer Textilmaschinenfabrik GmbH
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Publication of EP1695934A2 publication Critical patent/EP1695934A2/fr
Publication of EP1695934A3 publication Critical patent/EP1695934A3/fr
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge
    • 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
    • B65H51/00—Forwarding filamentary material
    • B65H51/30—Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/28—Reciprocating or oscillating guides
    • 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
    • B65H2701/312—Fibreglass strands
    • 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
    • B65H2701/314—Carbon fibres
    • 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
    • B65H2701/38—Thread sheet, e.g. sheet of parallel yarns or wires
    • 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
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/52—Integration of elements inside the core or reel
    • B65H2701/528—Heating or cooling devices

Definitions

  • the invention relates to a device for feeding slivers to a knitting machine with a gate, in which at least one coil is arranged, from which a sliver is deductible, a supply having delivery mechanism through which the sliver is guided, and a tape storage, a Has variable length storage path for the sliver.
  • Such a device is off DE 100 03 184 A1 known.
  • the delivery mechanism is located at the exit of the gate.
  • the delivery mechanism is followed by the tape storage.
  • the tape storage has a movably mounted idler pulley, which is pulled down under the action of gravity and additionally under the action of a spring to receive a tape length when not needed.
  • Such a device serves to supply slivers of a band laying device of a knitting machine with weft insertion system.
  • DE 197 39 411 A1 shows a device for feeding slivers to a knitting machine with a gate, in which at least one coil is arranged, from which a sliver is deductible.
  • a tape storage which is formed by a loop and having a variable length storage path for the sliver.
  • two mutually displaceable deflection rollers are provided which also form a variable length storage section for the sliver.
  • the tape storage is located between the gate and a weft yarn guide.
  • the tape storage has a driven by a motor actuator, with which the storage section is changeable.
  • a control device is provided which controls this actuator and the drive for the weft thread guide.
  • DE 38 42 870 C1 shows a Schussfadenzu Foodvortechnische for reverse shot magazines of warp knitting machines with a gate in which a plurality of coils are arranged, from which weft threads are withdrawn.
  • a first delivery mechanism is used, the two rollers are driven by an intermediate shaft and another drive connection from the main shaft of the knitting machine.
  • the withdrawn weft threads are fed to a storage device having a deflection point which is fixed to a carriage which is driven by a toothed belt and two toothed belt wheels becomes.
  • the tape storage is followed by a second delivery system.
  • US Pat. No. 6,230,775 B1 shows an apparatus for impregnating fibers unwound from fiber bobbins by passing them through a high temperature bath. The wetted fibers are then passed through a heating tunnel to dry them. Then they are wound up again on a spool.
  • US 5,200,018 describes a spreading device used to spread pre-impregnated multi-filament strands into flat ribbons. For this purpose, the fiber strands are guided over heated rods.
  • slivers are supplied by means of two arranged in the region of the longitudinal edges of the knitted fabric transport chains of the active site and fixed with mesh threads together.
  • the slivers which are collectively referred to as "sliver pile", thereby extending between the transport chains, which are provided with means for holding the slivers.
  • a stripper which is located above the transport chains, the slivers supplied by the device are conveyed over the transport chains and introduced into the holding means of the transport chains. It is often the case that the stripper transports the sliver only when crossing in one direction, ie from the transfer station facing the transport chain to the opposite transport chain, and in the transport chains stores.
  • the return stroke of the stripper takes place without sliver, since a reversal of the belt transport proves to be very difficult.
  • the separated, in the transfer station ready held end of the sliver is taken again and placed in the same order on the transport chains.
  • the stripper thus removes the sliver with interruptions from the device. In other words, the sliver is not processed at a constant speed by the sliver.
  • the fiber slivers to be processed are mostly carbon fibers or glass fibers which have a very low elasticity. Once existing differences in tension can be almost not compensated in retrospect.
  • the invention has for its object to provide slivers so that they can be laid as evenly as possible.
  • the tape storage between the gate and the delivery mechanism is arranged and the tape storage has a motor-driven actuator, with which the length of the storage section is variable, wherein a control device is provided which the Actuator and the delivery drive operated in a coordinated manner, wherein a heating channel is arranged in the direction of movement of the sliver behind the delivery mechanism.
  • the device With this device, it is possible to reduce voltage differences in the slivers to a minimum. This is true in any case insofar as such voltage differences are caused by the removal process from the coil. Namely, with the device, it is possible to peel off the sliver at a constant speed from the spool, which is usually braked, even when the sliver is at the exit of the device only intermittently accepted.
  • the delivery mechanism ensures that the sliver is fed positively to the sliver.
  • the delivery rate of the delivery system is consistent with the speed of movement of the band laying device. As long as the tape laying device is working, sliver is consumed.
  • the band laying device does not lay a sliver because it is, for example, on the "return path"
  • the delivery mechanism does not deliver any sliver. But so that the sliver can still be withdrawn from the spool at a constant speed, the tape storage is used.
  • the tape storage is now not just passive on a certain length of the sliver on.
  • About the actuator of the tape storage is able to deduct the sliver from the coil instead of the delivery plant. This is done simply by the fact that the tape storage extends the storage distance with the aid of the actuator.
  • the actuator When the delivery mechanism resumes action to feed the sliver to the slitter, the actuator is also actuated to shorten the storage path and thereby release a sufficient amount of sliver.
  • the actuator By an appropriate coordination of the actuator and the delivery drive, it is now possible to withdraw the sliver at a uniform speed of the bobbin over the entire production process, regardless of whether the band laying device consumed sliver or not.
  • the fact that the sliver can be removed at a constant speed, there are no speed variations caused by voltage differences, so that the slivers can be laid with a high uniformity.
  • a heating channel is arranged in the direction of movement of the sliver behind the delivery mechanism.
  • the heating channel is able to act on the sliver over a longer distance and to provide it with a higher temperature. In doing so, account is taken of the fact that the delivery plant delivers intermittently. In the heating channel, the sliver can then be heated even at standstill.
  • the actuator can move the carrier along a rectilinear movement path.
  • the memory section increases or decreases at twice the speed. Since the pulley is not simply hung on a spring, the risk of vibration tendency is considerably reduced.
  • each coil is associated with a belt pivot, which has on one pivotable about an axis lever adjacent to the coil inlet guide and an axis immediately adjacent outlet guide, wherein the sliver is guided by the output guide to a fixed point of contact.
  • the sliver is usually mecanicwikkelt in a cross-winding on the coil. When pulled off the bobbin, therefore, the position at which the sliver leaves the bobbin reciprocates over the entire axial length of the bobbin.
  • the belt pivot is now ensured that even with changing lift positions, the sliver is always fed to a fixed point of contact. From the fixed starting point, the sliver can then be continued straight.
  • the inlet guide By the inlet guide is ensured that the sliver can not break out of a designated guideway.
  • the inlet guide and the outlet guide can simply be formed as rectangular eyelets, through which the sliver is guided with its width. It should be noted that the sliver after removal from the coil usually has not reached its full width, in all Fibers are next to each other. But it is thicker than the thickness of a fiber.
  • each coil is associated with a pressing device which extends over the length of the spool, wherein the sliver is withdrawn from the spool by a nip or nip between the pressing means and the spool.
  • the pressing device which is loaded in the direction of the coil, for example by weight or spring force, then ensures that the sliver does not tip when pulling off the coil or break out of the cross-winding in any other way.
  • each coil is associated with a coil heater.
  • the coil heater ensures that the sliver is heated at least in a region on the surface of the coil.
  • the heating of the sliver is a measure that facilitates the spreading of the sliver. Accordingly, a first propagation step can already take place at the pressing device.
  • a band heater assembly is disposed between the gate and the band memory.
  • the BandMapan Aunt has in this position the advantage that it heats a continuously running sliver. Accordingly, even with simply constructed and controlled heaters, the risk that the sliver is overheated, because it is heated for example too long at one point, is low.
  • the BandMapan Aunt has at least one heated deflecting rod which is arranged between the coil and the belt pivot.
  • This deflection rod thus has two tasks. It serves, on the one hand, to supply the sliver with additional heat. Since the sliver is deflected around the deflecting rod, it also serves to allow the fibers of the sliver in their orientation can freely position. Thereafter, the sliver is guided with the different voltage ratios of the individual fibers, which arise from the circumstance of the cross winding, controlled to the fixed starting point by using the belt swivel.
  • the band heater has a Bandloom observed at the entrance of the tape storage.
  • the band heater at the entrance of the tape storage may have one or more heated deflecting rods. The heating serves to further spread the fibers in the sliver.
  • the wrap angle is adjustable by at least one deflection. This can influence the spreading effect.
  • the band heater at the input of the band memory is, so to speak, the last position in which the sliver is heated in a continuous movement.
  • the heating channel has a length which corresponds to a movement stroke of a stripper downstream of the device.
  • the entire sliver, which is processed in the subsequent stroke of the stripper brought to a uniform temperature.
  • the sliver then has neither longitudinal nor transverse temperature differences. This also allows voltage differences to be kept small.
  • a heating device at the output and optionally a heating device at the entrance of the heating channel is arranged.
  • the heater at the exit of the heating channel once again provides for heating the sliver, so that the sliver can be finally spread in a final propagation, before it is fed to the sliver.
  • the heater at the entrance may be advantageous to introduce an already heated sliver in the heating channel can. In this case, the heat supply in the heating channel can be made more moderate.
  • At least one spreading element is arranged in the course of the sliver, which has two transverse to the sliver extending deflection edges, which are arranged on opposite sides of the spreading element.
  • the fiber element thus runs quasi S-shaped through the spreading element. Characterized in that it is deflected twice by approximately the same angle, the total length of the sliver does not change over its thickness. at however, each deflection causes an increased tension on the outer fibers and tries to push inward. This is possible because the inner, ie the deflection edge adjacent fibers are looser. After passing through two deflection edges, a sufficient spread of the sliver is generally observed.
  • the deflection edges can also be formed by tubes, if necessary.
  • the distance corresponds to the width of the sliver.
  • These elevations are suitably rounded transversely to the longitudinal extent of the sliver.
  • the sliver is performed. Although this causes the sliver possibly slightly pushed back slightly, so that a small gap of the order of millimeters arises between adjacent slivers. However, this gap is automatically closed again at the next deflection edge.
  • the deflecting edges in the direction of movement of the sliver at a distance from one another, which corresponds to 0.8 to 2 times the thickness of the spreading element.
  • the deflection edges thus have a relatively small distance. It is also advantageous if they have a relatively small radius. The radius preferably corresponds to half the thickness of the spreading element. It is also possible to form the spreading element so that it is symmetrical to a median plane. In this case, if the deflecting edges are worn, one can achieve a doubling of its service life by simply inverting the spreading element.
  • the deflection edges define a transverse to the sliver elongated hole.
  • the slot then defines the final width of the sliver.
  • spreading elements are arranged so that their slots connect to each other transversely to the sliver. Behind the spreading elements then results in a fiber arrangement whose width is a multiple of the width of a single sliver. In this fiber arrangement then the individual fibers are relatively evenly distributed side by side. It may also be expedient to arrange at least two rows of oblong holes in longitudinal extension of the sliver one behind the other and to let overlap the slots in different rows.
  • the spreading element is arranged behind the heating channel.
  • the spreading element then forms, so to speak, the completion of the propagation or the "final propagation".
  • Fig. 1 shows an apparatus 1 for feeding slivers 2-4 to a not shown tape laying device of a knitting machine with weft insertion system.
  • the tape laying device adjoins an output 5 of the device 1.
  • the device 1 has a gate 6, in which a coil 7-9 is arranged for each sliver 2-4.
  • Each spool 7-9 is rotatably supported and braked so that the sliver 2-4 can be withdrawn under a certain tension.
  • the coil 7 is associated with a pressing device 10 which presses with a certain force on the circumference of the coil.
  • the pressing device 10 has a roll rolling on the circumference of the coil 7, which is suspended on a lever 11.
  • the lever 11 is in the gate 6 stored.
  • the lever 11 is under the bias of a spring, not shown. A bias by a weight would be possible.
  • the coil 7 is further associated with a coil heater 12, which heats the sliver on the surface of the coil 7, for example, by IR radiation or by hot air.
  • the withdrawn from the bobbin 7 sliver 2 is deflected around the pressing device 10 and passed immediately thereafter around a heated deflecting bar 13, so that the individual fibers, such as carbon fibers, which form the sliver 2, can freely position in their orientation.
  • the sliver 2 is wound in a cross-winding on the spool 7.
  • the pressing device 10 prevents premature constriction or tilting of the sliver by the withdrawal torque.
  • the sliver 2 which constantly changes the angular position relative to the coil 7 through the cross winding, can not tip over or break out of the cross winding in any other way.
  • a belt pivot 14 which has a lever 15 which is pivotable about an axis 16.
  • the axis 16 is located at the end of the lever 15 which is farthest from the coil 7.
  • the lever 15 has at one end an inlet guide 17 which is adjacent to the coil 7, and at the other end an outlet guide 18, which adjoins the axis 16 almost directly. Accordingly, the sliver 2 in the outlet guide is practically always in a constant position relative to the spool 7, regardless of the axial position at which the sliver 2 is withdrawn from the spool 7. Accordingly, the sliver 2 can be guided at a fixed casserole point 19 via a guide roller 20 which is arranged behind the creel 6.
  • the inlet guide 17 and the outlet guide 18 are each formed as a bent tube or bent in another way deflecting edge.
  • the sliver then converges in the lowest point of the bend and is relatively easily guided in this way.
  • the consequent pushing together of the fibers, which may well lead to some fibers of the sliver 2 are superimposed, is not critical at this point, because the sliver 2 is again spread sufficiently in the subsequent processing.
  • a belt pivot 14 The function of a belt pivot 14 is based on the 3 and 4 will be briefly explained again.
  • the tape 2 is lifted due to the cross-winding of the coil 7 at different axial positions of the coil 7.
  • the two extreme positions are in Fig. 3a and Fig. 3b shown.
  • Fig. 3a the sliver 2 from the left end of the coil 7 and in Fig. 3b lifted off the right end of the coil 7.
  • By pressing device 10 tilting tilting is prevented.
  • the heated deflecting bar 13 the sliver 2 is guided so to speak S-shaped. This guide allows a first spreading of the sliver.
  • the sliver 2 is almost always listed at the same place on the guide roller 20, so that after leaving the belt pivot 14, a shift of the sliver 2 is no longer transverse to its direction.
  • the slivers receive a positive guidance, so that the sliver 2 can neither tilt nor break out of its intended guide band. From the fixed starting point 19, the sliver 2 can now be continued in a straight line.
  • a tape store 21 In the web running direction, ie in the running direction of the fiber ribbons 2-4, behind the gate 6, a tape store 21 is arranged, which has a movable deflection roller 24 between two stationary deflection rollers 22, 23.
  • the movable deflection roller 24 is arranged on a carriage 25 which can be moved in a guide 26 up and down. The movement is caused by an actuator 27, for example an electric motor, which drives the carriage 25 upwards or downwards via a corresponding transmission device.
  • a heating device 28 is arranged, which is formed from a plurality of, in the present case three heated Umlenkstäben 29, over which the slivers 2-4 are guided.
  • the deflection rods 29 are preferably electrically heated. You can adjust the wrap angle to influence the spreading effect.
  • a delivery mechanism 30 In the web running direction behind the tape storage 21, a delivery mechanism 30 is arranged, which has a delivery drive 31.
  • the delivery mechanism 30 has a plurality of rollers 32-34 about which the slivers 2-4 are guided. These rollers 32-34 are actuated synchronously by the delivery drive 31. They cause a feed of the fiber ribbons 2-4.
  • a heating channel 35 is arranged at the input of a heater 36 with a plurality of heated Umlenkstäben and arranged at the output of another heater 37 with a plurality of heated deflecting rods is.
  • the heating channel 35 has a length which corresponds to the laying stroke of a downstream band laying device. If the tape laying device consumes, for example, at one stroke or stroke, slivers with a length of 2.5 m, then the heating channel 25 has at least the length of 2.5 m.
  • a spreading element 38 is arranged for each sliver 2-4, the in Fig. 5 is shown in cross section.
  • the spreading element 38 has a slot 39 which extends transversely to the longitudinal extent of the sliver 2.
  • the slot 39 is limited in the direction 40 of the sliver 2 front by a first deflection edge 41 and rear by a second deflection edge 42.
  • the two deflection edges 41, 42 have a relatively small distance from each other. This distance is in the range of 0.8 to 2 times the thickness D of the spreader element 38. Its radius is D / half.
  • the sliver 2 is now guided once below and once above the spreading element 38 around the deflecting edges 41, 42.
  • the respective inner fibers of the sliver 2 are looser than the outer fibers.
  • the outer fibers are tight, ie they are under an increased tension, trying to push inward.
  • the fact that the sliver 2 is deflected twice, but ultimately results in the same length for all fibers, so that after leaving the Ausbreitelements 38, the fibers are arranged in good order next to each other.
  • the width of the slot 39 ie the extent transverse to the direction of movement 40, determined then the maximum width of the expanded sliver 2.
  • the spreading elements 38 are now positioned relative to each other so that their slots 39 connect to each other, so that the individual slivers 2-4 can connect directly next to each other.
  • the slots 39 may also be arranged in several rows, in which case the slots 39 of different rows may overlap. This is one way to arrange the slivers virtually without gaps. But even if the slots 39 are separated by small interruptions from each other, this is usually not critical, because the slivers 39 can emerge after exiting the slots 39 again to a sufficient extent.
  • the device 1 now operates as follows: The fiber ribbons 2-4 are withdrawn at a constant speed from the bobbins 7-9 and fed by the belt pivot 14 to predetermined positions. The constant speed of the fiber ribbons 2-4 is retained in the band memory 21.
  • the delivery mechanism 30 delivers only intermittently, and indeed whenever the Bandlege worn arranged at the output 5 of the device requires fiber ribbons. Therefore, the delivery drive 31 and the actuator 27 are coordinated so that, as the delivery drive 31 reduces the advancement of the slivers 2-4, the actuator 27 takes on the task of drawing slivers 2-4 from the spools 7-8.
  • the actuator 27 operates when the delivery drive 31 paused, practically at half the speed, because on the movable guide roller 24, the storage distance is increased or decreased by twice the movement of the guide roller 24.
  • the actuator 27 when the delivery drive 31 operates again, the actuator 27 also moves the deflection roller 24 upwards again to release sliver 2-4 of sufficient length. If, for some reason, delivery drive 31 operates slower than normal, then the actuator 27 can compensate for pulling the belts 2-4 off the spools 7-9, for example in a startup phase.
  • the device 1 is shown here with three slivers 2-4. Of course, however, more slivers are possible if a correspondingly larger number of coils is used.
  • Each sliver 2-4 contains a number of fibers ranging from, for example, 6,000 to 50,000 fibers. Even extremely fine fibers can be processed well with the device shown. For example, since carbon fibers are endless, the mentioned 6,000 to 50,000 fibers over the entire length, which can be several thousand meters, are available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Knitting Machines (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Moulding By Coating Moulds (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Dispositif pour l'acheminement de bandes fibreuses (2-4) à une machine à tricoter, comportant un râtelier (6), dans lequel est agencée au moins une bobine (7), d'où peut être tirée une bande fibreuse (2-4), un dispositif d'alimentation présentant une commande d'alimentation (31), par lequel dispositif la bande fibreuse (2-4) est acheminée, et un accumulateur de bande (21), qui présente un trajet d'accumulation modifiable en longueur pour la bande fibreuse (2-4), caractérisé en ce que l'accumulateur de bande (21) est aménagé entre le râtelier (6) et le dispositif d'alimentation (30) et l'accumulateur de bande (21) présente une commande de réglage (27) entraînée par moteur, avec laquelle la longueur du trajet d'accumulation peut être modifiée, dans lequel il est prévu un dispositif de commande qui commande la commande de réglage (27) et la commande d'alimentation (31) en conformité avec celles-ci, dans lequel un canal de chauffage (35) est aménagé dans le sens de déplacement de la bande fibreuse (2-4) derrière le dispositif d'alimentation (30).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'accumulateur de bande (21) présente un rouleau de renvoi (24) monté sur un support (25), le support (25) pouvant être déplacé par la commande de réglage (27).
  3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce qu'il est affecté à chaque bobine (7-9) un dispositif de pivotement de bande (14), qui présente, sur un levier pivotant autour d'un axe (16), un guide d'entrée (17) adjacent à la bobine (7-9) et un guide de sortie (18) directement adjacent à l'axe (16), la bande fibreuse (2-4) étant guidée par le guidage de sortie (18) vers un point d'entrée fixe (19).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est affecté à chaque bobine (7-9) un dispositif presseur (10) qui s'étend sur la longueur de la bobine (7-9), la bande fibreuse (2-4) étant tirée de la bobine (7-9) à travers un intervalle de pincement entre le dispositif presseur (10) et la bobine (7-9).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il est affecté à chaque bobine (7-9) un dispositif de chauffage de bobine (12).
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'un aménagement de chauffage de bande (13-28) est agencé entre le râtelier (6) et l'accumulateur de bande (21).
  7. Dispositif selon la revendication 6, caractérisé en ce que l'aménagement de chauffage de bande présente au moins une barre de renvoi chauffée (13), qui est disposée entre la bobine (7-9) et le dispositif de pivotement de bande (14).
  8. Dispositif selon la revendication 6 ou la revendication 7, caractérisé en ce que l'aménagement de chauffage de bande présente un dispositif de chauffage de bande (28) à l'entrée de l'accumulateur de bande (21).
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le canal de chauffage (35) présente une longueur qui correspond à une course de déplacement d'un positionneur de bande monté en aval du dispositif (1).
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'un dispositif de chauffage (37) est aménagé à la sortie et éventuellement un dispositif de chauffage (36) à l'entrée du canal de chauffage (35).
  11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce que, dans le déroulement de la bande fibreuse (2-4), il est agencé au moins un élément d'étalement (38), qui présente deux arêtes de renvoi (41, 42) s'étendant transversalement à une bande fibreuse (2-4), lesdites arêtes étant disposées sur les côtés opposés de l'élément d'étalage (38).
  12. Dispositif selon la revendication 11, caractérisé en ce que les arêtes de renvoi présentent dans le sens de déplacement (40) de la bande fibreuse (2-4) une distance mutuelle qui correspond à 0,8 à 2 fois l'épaisseur (D) de l'élément d'étalage (38).
  13. Dispositif selon la revendication 11 ou la revendication 12, caractérisé en ce que les arêtes de renvoi (41, 42) délimitent un trou allongé (39) disposé transversalement à la bande fibreuse (2-4).
  14. Dispositif selon la revendication 13, caractérisé en ce que plusieurs éléments d'étalage (38) sont aménagés de sorte que leurs trous allongés (39) se raccordent l'un à l'autre transversalement à la bande fibreuse (2-4).
  15. Dispositif selon l'une quelconque des revendications 11 à 14, caractérisé en ce que l'élément d'étalage (38) est aménagé derrière le canal de chauffage (35).
EP05020637A 2005-02-25 2005-09-22 Procédé pour alimenter des bandes fibreuses dans une machine de tricotage Active EP1695934B1 (fr)

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DE102005008705A DE102005008705B3 (de) 2005-02-25 2005-02-25 Vorrichtung zum Zuführen von Faserbändern zu einer Wirkmaschine

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JP2006233410A (ja) 2006-09-07
US20060225465A1 (en) 2006-10-12
JP4209899B2 (ja) 2009-01-14
CN1824859A (zh) 2006-08-30
CN1824859B (zh) 2010-09-29
EP1695934A3 (fr) 2007-11-21
EP1695934A2 (fr) 2006-08-30
DE102005008705B3 (de) 2006-09-21
US7458236B2 (en) 2008-12-02

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