EP2028307B1 - Procédé et dispositif destinés à déposer une couche de fils unidirectionnels sur des convoyeurs longitudinaux, procédé de présentation des fils de trame sur métiers à tricoter chaîne, et dispositif permettant de mettre en oeuvre ces procédés - Google Patents

Procédé et dispositif destinés à déposer une couche de fils unidirectionnels sur des convoyeurs longitudinaux, procédé de présentation des fils de trame sur métiers à tricoter chaîne, et dispositif permettant de mettre en oeuvre ces procédés Download PDF

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Publication number
EP2028307B1
EP2028307B1 EP20070114893 EP07114893A EP2028307B1 EP 2028307 B1 EP2028307 B1 EP 2028307B1 EP 20070114893 EP20070114893 EP 20070114893 EP 07114893 A EP07114893 A EP 07114893A EP 2028307 B1 EP2028307 B1 EP 2028307B1
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EP
European Patent Office
Prior art keywords
longitudinal
threads
offsetting
movement
rake
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.)
Not-in-force
Application number
EP20070114893
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German (de)
English (en)
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EP2028307A1 (fr
Inventor
Heinrich Munzert
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LIBA Maschinenfabrik GmbH
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LIBA Maschinenfabrik GmbH
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Filing date
Publication date
Application filed by LIBA Maschinenfabrik GmbH filed Critical LIBA Maschinenfabrik GmbH
Priority to DE200750003318 priority Critical patent/DE502007003318D1/de
Priority to ES07114893T priority patent/ES2342682T3/es
Priority to EP20070114893 priority patent/EP2028307B1/fr
Priority to CN2008101910780A priority patent/CN101525809B/zh
Publication of EP2028307A1 publication Critical patent/EP2028307A1/fr
Application granted granted Critical
Publication of EP2028307B1 publication Critical patent/EP2028307B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—Polyesters

Definitions

  • the invention relates to a method and a device for applying a unidirectional layer of threads on two longitudinal conveyor according to the preamble of claim 1, a method for presenting weft threads to warp knitting machines according to the preamble of claim 5 and an apparatus for applying a unidirectional layer of threads according to the preamble of claim 15.
  • a typical application is the presentation of weft threads on warp knitting machines.
  • the weft threads arranged individually or in groups are laid parallel to one another and running perpendicular to the longitudinal conveyors and fed to the knitting machines of the warp knitting machine.
  • the distance can be set and varied in a targeted manner in order to realize a desired pattern repeat. Examples of this first application show the DE 36 41 640 C1 and DE 199 57 019 C2 ,
  • Another important application is the construction of multi-axial on multi-axial machines.
  • successively several unidirectional layers of threads between the two longitudinal conveyors are stored one above the other.
  • the result is a band, strip or web-shaped unidirectional scrim, which is fed by the longitudinal conveyors of a connection station in which the superimposed unidirectional layers are interconnected, for example by Forking, sewing or needles.
  • Examples of the production of Multiaxialgelegen show the DE 197 26 831 C5 and the DE 102 07 317 C1 ,
  • the multiaxial sheets produced in this way are of great importance in the production of fiber composite materials.
  • the produced Multiaxialgelege be integrated as reinforcement in a matrix, the polymeric systems, especially polyester and epoxy resins are in the foreground.
  • the individual unidirectional layers are mainly threads of carbon, glass, ceramic, but also synthetic fibers such as aramid fibers or polyamide fibers in question.
  • the threads are also referred to as fibers or cables; they are composed of individual filaments and can differ considerably not only in terms of the material, but also in terms of their diameter and the number of filaments that make them up.
  • different mechanical properties arise, which must already be taken into account when depositing a thread layer and when fastening it to the longitudinal conveyors of the multi-axial machine.
  • the threads are deposited transversely to the longitudinal conveyors, whereby the term “transversely” can mean a course of the threads perpendicular or oblique to the transport direction of the longitudinal conveyors.
  • the threads can be stored individually or as a group of threads, so in groups.
  • As a longitudinal conveyor transport chains are especially common where attachment hooks are as holding elements for the threads.
  • the term "fastening hook” encloses all the usual suitable for the endless filing of filaments holding devices, including needles or pins.
  • the fastening hooks are arranged at regular intervals on the longitudinal conveyors, whereby arrangements with two or more longitudinal rows of fastening hooks are known, cf. again the DE 102 07 317 C1 ,
  • the threads are withdrawn from a supply of the threads as endless threads and fed to the longitudinal conveyors.
  • the supply can be a single coil or a creel.
  • the prior art driven coils or loose coils with thread brake have been considered equally.
  • the term "feeder” also includes the yarn guides and offset rakes known in the art.
  • the usual yarn guides for which other terms such as wagons or thread layers are customary, initially have the task to introduce the threads to the moving longitudinal conveyor. For this purpose, they periodically move transversely between the longitudinal conveyors and also back and forth over the longitudinal conveyors. When the thread guide has reached the inflection point of its trajectory and the threads are laying around the attachment hooks of the longitudinal conveyors, an offset of the threads parallel to the direction of the longitudinal conveyor, but opposite to the transport direction is required. Only then does a parallel yarn deposit, ie a unidirectional position, come about during the further movement of the yarn guide.
  • this offset movement is performed by the thread guide itself, whereby the thread guide in addition to its transport movement (supply of threads to the longitudinal conveyors) and the offset (temporary retention of the threads and ggs. Their movement against the transport direction of the longitudinal conveyor) must make.
  • the offset is not only intended to achieve a uniform parallel arrangement of all threads over the length of the unidirectional layer, but that by a ggs. variable distance between the individual threads or thread groups, but also by a partial overlap when filing a variable pattern repeat is achieved, see. DE 100 49 280 B4 and EP 0 303 685 B1 ,
  • each longitudinal conveyor is assigned a respective offset rake, which is located in the region of the machine in which the thread guide brings the newly laid threads to the longitudinal conveyor.
  • the offset rakes are arranged on the outer sides of the longitudinal conveyor, ie outside the resulting unidirectional layer and parallel to the longitudinal conveyors in the transport direction and opposite thereto movable. They have downwardly directed hooks or teeth.
  • the thread guide travels over the longitudinal conveyor assigned to it, while the offset rake moves synchronously and in the same phase with the longitudinal conveyor in its transport direction.
  • the approached threads are guided through the attachment hooks of the longitudinal conveyor and taken over by the attachment hooks of the offset rule.
  • the offset rake then moves against the transport direction of the longitudinal conveyor in its offset position, wherein he pulls the threads with him.
  • the yarn guide has now begun its return to the opposite longitudinal conveyor and now pulls in turn to the located in the offset rakes threads.
  • the offset rake now reverses its direction of movement again and moves in synchronism with and against the longitudinal conveyor in such a phase that the threads drawn by the thread guide slide off the fastening hooks of the offset rake, thereby comprising the attachment hooks located on the longitudinal conveyor and thus offset are attached to the longitudinal conveyor. Hold-downs can support the process of slipping.
  • the invention is therefore based on the object to improve the initially mentioned method and the associated device such that a smooth movement of the feeder a jerk-free operation is achieved with increased operating speed and the threads to exactly selectable, reproducible times from the restraint position of the feeder be released.
  • the feeders can move across the longitudinal conveyors and on both sides thereof, whereby they are at least partially passed through the attachment hooks of the longitudinal conveyors in the transverse movement.
  • the feeders according to the invention can undergo a closed curved trajectory during a laying and shifting operation. Constructively, such a movement of the feeder is to be realized by an arrangement in the manner of a cross slide is selected and individual drives for the two directions of movement are provided with a CNC control. But other constructive solutions are conceivable.
  • a fast movement sequence of the laying and displacement movement already results from the fact that at least the holding elements present on the feeders are at least partially guided through the gaps of the fastening hooks in their transverse movement, which are located on the longitudinal conveyors.
  • the feeders can also be moved three-dimensionally, wherein the third movement dimension runs perpendicular to the two-dimensional movement plane of the feeders.
  • the feeders or at least their fastening elements can be guided away at least partially via the fastening hooks of the longitudinal conveyors.
  • the unidirectional layer to be applied is not too wide, it is possible to supply the threads withdrawn from the supply directly to the feeder associated with the first longitudinal conveyor and subsequently transfer them to the feeder associated with the second longitudinal conveyor. In this way, a special thread guide is unnecessary.
  • the first feeder performs in this case at the same time the functions of a thread guide and a Versatzrechens, but does not have to be moved over the entire laying width. Depending on the width of the web and the nature of the threads to be applied, however, they can also be fed to the first of the two feeders via a thread guide, which is movable back and forth between the two longitudinal conveyors, from which they then take over the second feeder.
  • Claims 5 to 14 are directed to a method for presenting weft threads on warp knitting machines using a thread guide.
  • the prior art forms the already mentioned above DE 36 41 640 C1 ,
  • the object of the invention remains the same as it has already been mentioned for claim 1. It should also be in the operation with thread guide and offset rake an improved, jerk-free motion with increased operating speed can be achieved, the threads are released at exactly selectable, reproducible times from the retention position of the offset rake.
  • the feeders are in this case the offset rakes, which according to the invention are thus moved controlled in two mutually perpendicular axes x and y, wherein the y-axis is parallel to the transport direction of the longitudinal conveyor.
  • the laying area of the thread guide remains limited to the area that extends between the two longitudinal conveyor, while the offset rake in this area and outside of it act on the weft threads.
  • the thread guide can now be optimally adjusted to its function to bring the threads to the longitudinal conveyor. Additional movements with regard to the offset process are no longer required. In addition, the range of movement of the thread guide is limited to the area between the longitudinal conveyors. This allows a greater transfer speed of the thread guide.
  • the offset rakes are placed on the offset movement and have as a result of the two-dimensional mobility of a "softer" movement, which allows a vote on the movement of the longitudinal conveyor and the thread guide with even greater speed.
  • an offset rake pulls a thread loop out of the moving endless threads, which are transferred from the supply to the attachment hooks of the longitudinal conveyors.
  • a thread loop is nothing more than a thread tensioner or thread supply.
  • a yarn guide is therefore basically suitable to compensate for stresses and differences in length between the threads of a thread layer and to keep constant. Due to the mechanical coupling with the thread guide, the strictly linear trajectories and the uncertain time of slipping from the Offset rake, the known thread guide the task of length and stress compensation so far only imperfect fulfill.
  • the movement and control of the offset rakes according to the invention makes it possible for the thread guide no longer to come into contact with already laid threads during its return movement, thereby disturbing the thread layer.
  • the longitudinal conveyor usually transport chains, remain unchanged when using the offset rake according to the invention.
  • the encompassing of the weft threads by the retaining claws can be assisted by a holding device located on the thread guide presses the weft threads in the direction of the laying plane, whereby the weft threads fall into the region of the retaining claws.
  • the hold-down can be actuated by the thread guide is pivoted with the attached hold-down (claims 11 and 12).
  • the retaining claws when changing from the gripping position to the retaining position and vice versa are at least partially passed through the gaps between the fastening hooks on the moving longitudinal conveyor.
  • Claim 15 is directed to the apparatus for carrying out the methods according to claims 1 to 14.
  • the device can be designed for installation in a chain machine or a multi-axial machine.
  • the term "further processing" in the preamble of claim 15 can thus mean either that the threads are fed to the knitting tools of a warp knitting machine, where they run as weft threads at an angle of 90 ° to the longitudinal conveyors; or the further processing may be that several layers of thread are stored one above the other and fed to a connection station, wherein the connection does not necessarily have to be made by a knitting machine.
  • the holding elements are thus holding claws whose gripping direction at an acute angle of 10 ° to 20 °, preferably 13 ° to 17 °, pointing forward in the direction of movement of the longitudinal conveyor inclined have to.
  • This position arises from the partially contradictory requirements that the holding elements should, if possible or at least partially pass through the moving attachment hooks of the longitudinal conveyor, but at the same time a smooth sliding over the yarn sheet from the thread guide in the offset rakes and then slipping back from the holding elements of the Versatzrechens should take place on the attachment hooks of the longitudinal conveyor.
  • the specified in claim 19 advantageous embodiment is particularly geared to yarn sheets or individual threads that are stored endlessly at an angle of 90 ° on the longitudinal conveyors.
  • This is the standard tray for weft threads on warp knitting machines.
  • the gripping direction of the holding claws and the weft threads held by them during the displacement movement and before the weft threads are about to coincide.
  • the process of transfer to the attachment hooks of the longitudinal conveyor is thereby substantially facilitated.
  • the claims 20 to 24 contain essential design rules for the retaining claws, wherein particularly the said transitional processes are taken into account.
  • Claim 25 is directed to a particularly advantageous embodiment for driving the offset rake.
  • the invention also relates to a warp knitting machine according to claim 26 and a multi-axial machine according to claim 27. These machines are characterized according to the invention then in terms of the device for applying a unidirectional layer Threads are formed on two longitudinal conveyor according to one or more of claims 15 to 25.
  • Fig. 1 illustrates the flow of the inventive method when applying a unidirectional layer of not too large laying width.
  • the laying of a single thread 8 is shown in a spherical parallel-tray.
  • Two spaced-apart driven longitudinal conveyor 1 and 2 have attachment hooks 3 and 4.
  • the longitudinal conveyor 1, 2 move continuously in the transport direction 5. In practice, they consist of conveyor chains, of which only the upper run can be seen.
  • an endless thread 8 is guided from a supply 6 to a knitting station 7.
  • the supply 6 may be a coil; in the case of a group of threads he would be a creel.
  • the yarn 6 leaving the supply 6 is fed via a deflection roller 9 to a first feeder 10. From there, the thread 8 runs to a second feeder 11.
  • the feeders 10 and 11 have retaining claws 12 and 13, with which they take the passing endless thread 8 temporarily.
  • the function of the feeder 10, 11 is to pull out of the passing thread 8 loops and this around the next following in the transport direction 5 mounting hooks 3a and 4a of their associated longitudinal conveyor 1, 2 put around. In this way, the feeders 10 and 11 simultaneously perform the function of a thread guide and an offset rule. After completion of the offset movement, the thread 8 is wrapped around two attachment hooks 3a, 3b and 4a, 4b of the two longitudinal conveyors 1, 2.
  • the feeders 10, 11 move in two mutually perpendicular directions x and y, wherein they are controlled such that continuously a closed, at least partially curved trajectory 14 and 15 is traversed.
  • the y-direction runs parallel to the transport direction. 5
  • the trajectories 14 and 15 are easily realized by combined drives and CNC controls.
  • the closed trajectories 14 and 15 with their at least partially curved course are to be realized without jerk even at higher installation speeds.
  • each feeder 10, 11 moves in the x-direction on both sides of its associated longitudinal conveyor 1, 2 and beyond.
  • the retaining claws 13 and 14 of the feeders 10, 11 must, for this purpose, move through the moving fastening hooks 3, 4 of the longitudinal conveyors 1, 2.
  • This movement can still be facilitated by the fact that the feeders 10, 11 are also movable in a direction perpendicular to the laying plane defined by the axes x and y. In the case of horizontally moving longitudinal conveyors 1, 2, this means a movement in the vertical direction.
  • the two feeder When transferring the thread 8 from the first feeder 10 to the second feeder 11, the two feeder need not touch. It is sufficient if - as shown - the thread 8 with a sufficient inclination to the feeders 10 and 11 tapers. So that the thread 8 can easily slide onto the hooks 3, 4 of the longitudinal conveyors 1, 2 and into the retaining claws 12, 13 of the feeders 10, 11, the use of a driven coil (positive trigger) is expedient.
  • Fig. 2 shows in an embodiment, the apparatus for performing the method according to the invention, when a conventional yarn guide 26 is used.
  • a side view transverse to the longitudinal conveyors 21 and 22 of this device is shown.
  • the longitudinal conveyor are again provided with fastening hooks 23, 24.
  • the longitudinal conveyors 21, 22 form a laying plane, over which the yarn guide 26 reciprocates periodically.
  • the yarn guide 26 is pivotable about a pivot axis 27 which is perpendicular to the direction of movement of the yarn guide. By pivoting the yarn guide 26 about its pivot axis 27 optionally come a first hold-28 or second hold-29 to the effect.
  • Fig. 2 shows the state that a thread layer 30a is laid and the thread guide 26 moves to the right on the first longitudinal conveyor 21 to.
  • Each longitudinal conveyor 21, 22 is assigned a feeder in the form of a first offset rake 31 and a second offset rake 32.
  • the offset rakes 31, 32 have retaining claws 33, 34, with which they temporarily grasp the passing yarn sheet 30 in the form of a loop and around the attachment hooks 23, 24 located on the longitudinal conveyors 21, 22.
  • the offset rakes 31, 32 are movable in two mutually perpendicular directions x and y, wherein the y-direction parallel to the transport direction 25 of the longitudinal conveyor 21, 22nd runs, cf. Fig. 3 , The movement of the offset rakes 31, 32 in the y-direction may be in the transport direction 25 and opposite thereto.
  • Fig. 2 shows only in a side view the starting or 0 position.
  • the offset rake 26 moves to the right on the first offset rake 31 via an already deposited group of threads 30a. This is located in its furthest extended gripping position.
  • Fig. 3 shows the position A in side view and in a view from above on the laying plane.
  • the yarn guide 26 is pivoted about its pivot axis 27, so that the first hold-down 28 pushes the yarn sheet 30 down.
  • the weft threads of the yarn sheet 30 thereby enter between the holding claws 33 of the first offset rake 31 a.
  • Fig. 4 is the position B reached.
  • the yarn sheet 30 is inserted into the retaining claws 33 of the first offset rake 31, and this continues to move in the x direction to its restraint position.
  • Fig. 5 shows a further intermediate position, namely the position C.
  • the first offset rake 31 is with its retaining claws 33 between the mounting hooks 23 of the first longitudinal conveyor 21 and moves in the x-direction further towards its restraining position.
  • Fig. 6 is shown for the yarn guide 26 only a single position, while in the top view for the first offset rake 31 two consecutively occurring position, namely the positions D and E are shown.
  • the offset rake 31 is now in its restrained position, which is maintained until the position E is reached, cf. Fig. 8 ,
  • the holding claws 33 of the first offset rake 31 are now located on the other side of the fastening hooks 23.
  • In the y-direction of the offset rake 31 now performs the offset against the transport direction 25 of the longitudinal conveyor 21, 22 until the position E is reached.
  • the yarn guide 26 is pivoted back during this, so that the two hold-down 28, 29 are ineffective.
  • the yarn sheet 30 is securely held in the retaining claws 33 of the first offset rake 31.
  • the yarn guide 26 continues to move in the direction of the opposite second longitudinal conveyor 22.
  • Fig. 7 shows further intermediate positions F and G.
  • the outward movement of the first offset rake 31 begins in its gripping position.
  • the retaining claws 33 have already traversed or traversed the gaps between the fastening hooks 23, but still hold the weft threads of the yarn sheet 30 firmly, which, however, have already largely been wrapped around the fastening hooks 23.
  • the first offset rake 31 moves back out of its offset position into the starting position in the y direction and in the transport direction 25.
  • Fig. 9 shows a particularly advantageous possibility, a feeder in the embodiment of a Versatzrechens simultaneously in the direction of two axes x and y independently drive. From the offset rake is in FIG. 9 only to see the base 53 at which threaded holes 54 for fixing retaining claws 33, 34 are located (see. Fig. 10 ). To drive the base 53, the drive unit 41, which has a housing 42 is used.
  • a support and guide rail 44 is formed on the rear wall 43 of the housing 42.
  • a longitudinal slide 45 is movably held in the direction of the support and guide rail 44.
  • the longitudinal slide 45 is connected to an endless drive belt 46 which is guided around two rollers, of which in Fig. 9 only the bearing 47 of a loose roll can be seen.
  • the drive belt 46 is wrapped around a drive roller which is rotatable by a first servo motor 48 in two directions. This also results in two directions of travel 49 for the drive belt 46 and thus also for the longitudinal slide 45.
  • the rotor of the first servo motor 48 is rotatable by the machine control in alternating directions of rotation by certain degrees.
  • the cross slide 52 On the longitudinal slide guide points 50 are formed, in which two guide rods 51 of a cross slide 52 are guided longitudinally displaceable. Together with the longitudinal slide 45, the cross slide 52 forms a cross slide, with which it is possible in a known manner, a member, in this case the base 53 to move simultaneously in the direction of the two axes x and y, wherein the two components of movement are independent ,
  • the control of the cross slide 52 is effected by a coupling rocker, which consists of a hinged coupling member 56, the coupling rod 57 and the two oscillating arms 58a and 58b.
  • the coupling member 56 is pivotally connected via a hinge 55 to the cross slide 52. It is also pivotable about the coupling rod 57 and slidable on this in the longitudinal direction of the coupling rod 57, cf. the arrows 66.
  • the two swing arms 58a and 58b pivot in operation by certain angular degrees about the oscillating shaft 59.
  • the cross slide 52 can be reciprocated on the longitudinal slide 45 in the direction of the x-axis. Since the coupling member 56 can slide on the coupling rod 57 at the same time, the controlled movement of the cross slide 52 is also possible when the longitudinal slide 45 moves and occupies different positions.
  • the oscillating shaft 59 is rotated by the pulley 60, wherein the drive from a drive shaft 61 via a first belt drive 62, an intermediate shaft 64 and a second belt drive 63 takes place.
  • the drive shaft 61 is connected by a second, in Fig. 9 invisible servo motor driven.
  • the second servomotor is designed in the same way as the first, ie it displaces in operation the drive shaft 61 and thus the pulley 60 in a reciprocating rotary motion, in each case only by a certain angular amount, as indicated by the directional arrow 65 in Fig. 9 is indicated.
  • the pedestal 53 in a horizontal plane can drive through arbitrary trajectories composed of the independent components of the x and y axes.
  • the trajectories 13 and 14 registered.
  • From Fig. 9 apparent drive unit 41 is thereby incorporated into the device according to the invention, that the y-axis extends in the direction of the longitudinal conveyor, which is assigned to the drive unit 41.
  • FIG. 10 Once again, the base 53 is shown enlarged. At the base of the retaining claws 33, 34 are attached.
  • the in FIG. 10 shown base 53 corresponds in the representation of the FIGS. 3 to 7 a left side arranged offset rake 32 with retaining claws 34, see. Fig. 3 , The opposite offset rake 31 with retaining claws 33 would be compared to Fig. 10 to represent a mirror image.
  • the retaining claws 33 and 34 then differ in the direction of the angle ⁇ , about which their gripping direction 81 is inclined, starting from the x-axis in the direction of the running direction 25 of the longitudinal conveyors 21, 22.
  • Each retaining claw 33, 34 has a fastening tongue 71, which merges into a cantilever arm 72.
  • an angled web 73 connects, which in turn merges into the again angled claw tip 74.
  • the fastening tongue 71 carries two stepped bores 75, which on the threaded holes 54 in the base 53 (see. Fig. 9 ) are turned off and serve to attach the retaining claws 33, 34 to the base 53.
  • the retaining claws 33, 34 move over the laying plane formed by the longitudinal conveyors 21, 22.
  • the following is spoken of "above” and “below” in order to describe the assignment of the retaining claws 33, 34 to the longitudinal conveyors 21, 22 and their attachment hooks 23, 24.
  • the retaining claws 33, 34 move above the laying plane and must be passed in operation by the fastening hooks 23, 24 located on the longitudinal conveyors 21, 22.
  • the end of the cantilever arm 72, the web 73 and the claw tip 74 form the gripping area of the retaining claw 33, 34, whereby the gripping direction 81 is defined.
  • the gripping direction 81 is inclined by the acute angle ⁇ in the direction of the direction of movement 25 of the longitudinal conveyor 21, 22. It can be seen that the retaining claws 33, 34 can thereby retain a yarn sheet 30 well when the longitudinal conveyors 21, 22 continue to move and the offset must be carried out.
  • the angle ⁇ 15 °. This angle is optimal when weft threads 30 of a warp knitting machine must be offset.
  • the laying direction of the weft threads 30 is perpendicular to the direction of the longitudinal conveyors 21, 22.
  • the conditions for gripping the weft yarns 30 coming from the yarn guide 26 are different than when the weft yarns 30 from the holding claws 33, 34 to the mounting hooks 23, 24th the longitudinal conveyor 21, 22 are passed have to.
  • the angle of 15 ° is an optimum between the two different requirements.
  • the retaining claws 33, 34 are lowered at the transition from the fixing tongue 71 in the extension arm 72 downwards; the extension arm 72 is lower than the fixing tongue 71. This results in a stop surface 76, which serves for positionally accurate alignment with the base 53.
  • the extension arm 72 is provided at its end, where it merges into the web 73, with a downwardly projecting claw plate 77. At this downwardly projecting claw plate 77 close the web 73 and the claw tip 74 at.
  • the claw tip 74 is provided below with an inlet slope 78, which facilitates the sliding retraction of the yarn sheet 30 from the yarn guide 26 in the retaining claws 33, 34.
  • the claw tip 74 is provided with a slope, this time the outlet slope 79, which is advantageous if the yarn sheet 30 of the retaining claws 30, 34 in the fastening hooks 23, 24 of the longitudinal conveyor 21, 22 should pass.
  • the upper side of the web 73 and the claw tip 74 is stepped down relative to the extension arm 72 down.
  • On the extension arm 72 is located above the inside and the gripping opening of the retaining claw 33, 34 facing also an inclined surface 80. It is facing the yarn guide 26 in the acquisition of the yarn sheets 30, see. Fig. 3 , The inclined surface 80 thus facilitates the sliding of the yarn sheet on the extension arm 72 when the offset movement begins.
  • the lower edge of the claw shield 77 extends horizontally or slightly inclined upward in the direction of the base 53.
  • the claw shield 77 thereby holds down the threads and also adjacent threads.
  • the particular embodiment of the retaining claws 33, 34 is once the safe movement sequence when offsetting the thread shares 30. It is also important to keep wear and abrasion of the threads to be laid as small as possible. At the same time, the retaining claws 33, 34 are themselves subject to wear, depending on the thread material. It is therefore important that the retaining claws 33, 34 are removably secured to the base 53 or other parts of the offset rakes 31, 32.
  • the material of the retaining claws is steel in the form of a casting or as a milled part in question; with hard thread material such as glass fibers, the retaining claws must be hard chromed and polished.
  • Fig. 10 shows that the claw plate 77 is sunk inwardly towards the gripping opening with respect to the extension arm 72, so that a gusset 82 is formed on the holding arm 72.
  • This configuration makes it possible that the extension arm 72 remains relatively stable and yet the area of the gripping opening formed by the retaining plate 77, the web 73 and the claw tip 74 is so narrow that it can at least pass well through the fastening hooks 23, 24, the are located on the longitudinal conveyors 21, 22. This passage is made while the longitudinal conveyors 21, 22 are moving.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (27)

  1. Procédé pour appliquer une couche unidirectionnelle de fils sur deux transporteurs longitudinaux (1, 2) qui sont disposés à distance l'un de l'autre et sont dotés de crochets de fixation dans lesquels les fils extraits comme fils sans fin d'une réserve sont posés au moyen de dispositifs d'amenée (10, 11) déplaçables de manière commandée, les transporteurs longitudinaux formant le plan de pose de la couche unidirectionnelle, caractérisé en ce que un dispositif d'amenée (10, 11) qui est déplacé en deux dimensions dans un plan de déplacement qui coïncide avec le plan de pose ou s'étend parallèlement à ce dernier est associé à chaque transporteur longitudinal (1, 2).
  2. Procédé selon la revendication 1, caractérisé en ce que les dispositifs d'amenée sont déplacés en trois dimensions, la troisième dimension de déplacement étant perpendiculaire au plan bidimensionnel de déplacement.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que les fils (8) extraits de la réserve (6) sont amenés directement au dispositif d'amenée (10) associé au premier transporteur longitudinal (1) et sont ensuite repris par le dispositif d'amenée (11) associé au deuxième transporteur longitudinal (2).
  4. Procédé selon les revendications 1 ou 2, caractérisé en ce que les fils (8) extraits de la réserve (6) sont d'abord amenés à un guide-fil qui se déplace en va-et-vient entre les deux transporteurs longitudinaux (1, 2) et qui transfère les fils (8) au premier (10) des deux dispositifs d'amenée (10, 11) duquel ils sont transférés au deuxième dispositif d'amenée (11).
  5. Procédé de placement de fils de trame sur des machines à tricoter à chaîne, présentant les étapes suivantes :
    a) un guide-fil (26) exécute un déplacement de va-et-vient qui s'étend transversalement par rapport à deux transporteurs longitudinaux (21, 22) disposés en parallèle,
    b) le guide-fil (26) amène les fils de trame sans fin (30) aux transporteurs longitudinaux,
    c) les transporteurs longitudinaux (21, 22) transportent les fils de trame (30) posés entre eux vers les outils de tricotage de la machine de tricotage à chaîne,
    d) dans les parties d'inversion du déplacement en va-et-vient, les fils de trame (30) sont transitoirement repris par des dispositifs d'amenée qui servent de râteaux de décalage (31, 32) et à chacun desquels est associé un transporteur longitudinal (21, 22) respectif,
    e) chaque râteau de décalage (31, 32) exécute avec les fils de trame (30) un déplacement de décalage indépendant du déplacement du transporteur longitudinal (21, 22) auquel le râteau de décalage (31, 32) est associé et transfère ensuite les fils de trame (30) aux crochets de fixation (23, 24) de ce transporteur longitudinal (21, 22), caractérisé en ce que les étapes suivantes sont exécutées :
    f) chaque râteau de décalage (31, 32) est déplacé de manière contrôlée dans un plan de déplacement qui s'étend parallèlement au plan de pose formé par les transporteurs longitudinaux (21, 22), dans les directions de deux axes x et y perpendiculaires l'un à l'autre, l'axe y étant parallèle à la direction de transport (25) du transporteur longitudinal (21, 22), et
    g) la zone de pose du guide-fil (26) est limitée à la zone qui s'étend entre les crochets de fixation (23, 24) des deux transporteurs longitudinaux (21, 22), tandis que les râteaux de décalage (31, 32) agissent sur les fils de trame (30) dans cette zone et à l'extérieur de celle-ci.
  6. Procédé selon la revendication 5, caractérisé en ce que le déplacement des râteaux de décalage (31, 32) accordé aux déplacements du guide-fil (26) et des transporteurs longitudinaux (21, 22) s'effectue grâce à des entraînements propres et à l'aide d'une commande autonome.
  7. Procédé selon la revendication 6, caractérisé en ce que chaque râteau de décalage (31, 32) se déplace au moins en partie sur un parcours courbe lorsqu'il exécute le décalage.
  8. Procédé selon la revendication 7, caractérisé en ce que le râteau de décalage (31, 32) suit une piste fermée qui présente des composantes dans la direction de l'axe x et dans la direction de l'axe y.
  9. Procédé selon la revendication 8, caractérisé en ce que lors du décalage des fils de trame (30), les étapes de traitement suivantes se déroulent en répétitions cycliques :
    a) le râteau de décalage (31, 32) est extrait dans la direction x de sa position de saisie dans laquelle il s'engage dans la zone de pose du guide-fil (26) située entre les transporteurs longitudinaux (21, 22) par des griffes de maintien (33, 34) qui débordent du plan de déplacement du râteau de décalage (31, 32) en direction du plan de pose,
    b) les fils de trame (30) amenés par le guide-fil (26) à proximité du transporteur longitudinal (21, 22) associé sont entourés par les griffes de maintien (33, 34),
    c) partant de la position de saisie, le râteau de décalage (31, 32) est reculé dans la direction x jusque dans sa position de retenue dans laquelle ses griffes de maintien (33, 34) sont situées avec les parties qui entourent les fils de trame (30) à une certaine distance en arrière des crochets de fixation (23) du transporteur longitudinal (21, 22) associé,
    d) dans sa position de recul, le râteau de décalage (31, 32) est déplacé de la distance de décalage nécessaire suivant l'axe y en opposition à la direction d'avancement du transporteur longitudinal (21, 22),
    e) le râteau de décalage (31, 32) ressort ensuite dans la direction de l'axe x pour revenir dans la position de saisie de laquelle il retourne dans sa position initiale dans la direction de l'axe y, dans la même direction d'avancement (25) que les transporteurs longitudinaux (21, 22), tandis que les fils de trame (30) glissent hors des griffes de maintien (33, 34) du râteau de décalage (31, 32) et s'échangent sur les crochets de fixation (23, 24) du transporteur longitudinal (21, 22) associé et
    f) tous les déplacements partiels qui se suivent mutuellement dans les directions de l'axe x et de l'axe y peuvent se prolonger l'un dans l'autre pour obtenir des parcours de déplacement courbes.
  10. Procédé selon la revendication 9, caractérisé en ce que le chevauchement des fils de trame (30) par les griffes de maintien (33, 34) et leur libération par ces dernières est obtenu par une profilation des griffes de maintien (33, 34) qui est réglée sur une position définie et/ou un déplacement défini du râteau de décalage (31, 32).
  11. Procédé selon la revendication 10, caractérisé en ce que pour que les griffes de maintien (33, 34) chevauchent les fils de trame (30), les fils de trame (30) sont repoussées en direction du plan de pose par au moins un dispositif de retenue (28, 29) situé sur le guide-fil (26), suite à quoi les fils de trame (30) passent dans la zone d'entrée des griffes de maintien (33, 34).
  12. Procédé selon la revendication 11, caractérisé en ce que le dispositif de retenue (28, 29) est actionné en inclinant le guide-fil (26) sur lequel le dispositif de retenue (28, 29) est fixé.
  13. Procédé selon l'une des revendications 9 à 12, caractérisé en ce que lors du passage de la position de saisie à la position de retenue et inversement, les griffes de maintien (33, 34) passent dans les trous situés entre les crochets de fixation (24, 25) prévus sur le transporteur longitudinal (22, 23) qui les déplace.
  14. Procédé selon l'une des revendications 9 à 12, caractérisé en ce que le râteau de décalage (31, 32) peut également être déplacé de manière contrôlée dans la direction perpendiculaire au plan de pose formé par les transporteurs longitudinaux (21, 22) et en ce que lors du passage de la position de saisie à la position de retenue et inversement, les griffes de maintien (33, 34) sont éloignées au moins par parties au-dessus des crochets de fixation (24, 25) situés sur les transporteurs longitudinaux (21, 22).
  15. Dispositif d'application d'une couche unidirectionnelle de fils sur deux transporteurs longitudinaux (1, 2) disposés à distance l'un de l'autre, dotés de crochets de fixation (3, 4) et amenant vers la poursuite du traitement les fils retenus par les crochets de fixation, et présentant une réserve de laquelle les fils sont extraits sous la forme de fils sans fin et sont amenés aux transporteurs longitudinaux,
    deux dispositifs d'amenée (10, 11) entraînés de manière contrôlée, dont chacun est associé à un des transporteurs longitudinaux, reprend transitoirement les fils sans fin qui lui sont apportés et les transfère aux crochets de fixation du transporteur longitudinal associé,
    en particulier en vue de l'exécution du procédé selon les revendications 1 à 4, caractérisé en ce que les dispositifs d'amenée (10, 11) sont guidés à déplacement dans la direction de deux axes x et y qui s'étendent perpendiculairement l'un à l'autre, dans un plan de déplacement qui s'étend parallèlement au plan de pose formé par les transporteurs longitudinaux (1, 2), l'axe y s'étendant parallèlement à la direction de transport (5) des transporteurs longitudinaux (1, 2).
  16. Dispositif selon la revendication 15, caractérisé en ce que les dispositifs d'amenée sont de plus guidés à déplacement et entraînés de manière contrôlée suivant un axe perpendiculaire au plan de pose formé par les transporteurs longitudinaux.
  17. Dispositif selon les revendications 15 ou 16, caractérisé en ce que la plage de déplacement de chacun des dispositifs d'amenée (10, 11) s'étend suivant l'axe x vers les deux côtés du transporteur longitudinal (1, 2) qui lui est associé.
  18. Dispositif selon les revendications 15 à 17, en particulier en vue de l'exécution du procédé selon la revendication 5, caractérisé en ce qu'il présente un guide-fil (26) déplacé de manière contrôlée, qui amène alternativement une nappe de fils (30) extraite de la réserve sur les transporteurs longitudinaux (21, 22), les dispositifs d'amenée servant de peigne de décalage (31, 32).
  19. Dispositif selon la revendication 18, caractérisé en ce que pour reprendre transitoirement la nappe de fils (30), des griffes de maintien (33, 34) sont disposées sur le râteau de décalage (31, 32), s'étendent essentiellement dans le plan de déplacement x, y, la direction de saisie (81) des griffes de maintien (33, 34) s'étendant obliquement vers l'avant dans la direction de déplacement (25) des transporteurs longitudinaux (21, 22) enformant un angle aigu α de 10° à 20° et de préférence de 13° à 17° avec l'axe x.
  20. Dispositif selon la revendication 19, caractérisé en ce que chaque griffe de maintien (33, 34) présente une languette de fixation (71) qui repose sur le râteau de décalage et un bras de flèche (72) qui se prolonge par une entretoise transversale (73) en une pointe de griffe (74) rabattue vers l'arrière, l'extrémité du bras de flèche (72), l'entretoise (73) qui s'y trouve et la pointe libre (74) de l'extrémité de griffe formant la zone de saisie de la griffe de maintien (33, 34) qui définit la direction de saisie (81).
  21. Dispositif selon la revendication 20, caractérisé en ce que la zone de saisie de la griffe de maintien (33, 34) est configurée de manière à déborder en direction du plan de pose partant du bras de flèche (72) et hors du plan de déplacement x, y, le bras de flèche (72) de la pointe (74) de griffe formant en position opposée un écran de griffe (77) qui déborde de la même manière.
  22. Dispositif selon la revendication 21, caractérisé en ce que l'entretoise (73) et la pointe (74) de griffe sont placées en gradin sur l'écran de griffe (77), le gradin étant formé en direction de la saillie, et en ce que la pointe de griffe (74) forme avec son bord tourné vers le plan de pose une pente d'entrée (78) et par son bord opposé une pente de sortie (79), la pente d'entrée et la pente de sortie (78, 79) facilitant le coulissement de la nappe de fils (30) sur les griffes de maintien (33, 34).
  23. Dispositif selon les revendications 20 à 22, caractérisé en ce que sur sa surface intérieure tournée vers la zone de saisie et qui est tournée vers le guide-fil (26) lors de la reprise des nappes de fils (30), le bras de flèche (72) présente une surface oblique (80) qui facilite le coulissement des nappes de fils (30).
  24. Dispositif selon les revendications 19 à 23, caractérisé en ce que les griffes de maintien (33, 34) sont fixées en position immobile sur un socle (53) du râteau de décalage (31, 32) et présentent dans ce but des surfaces de butée (76) dans la zone de la transition entre la languette de fixation (71) et le bras de flèche (72).
  25. Dispositif selon les revendications 18 à 24, caractérisé par l'agencement et l'entraînement d'un râteau de décalage (31, 32), avec les caractéristiques suivantes :
    a) un coulisseau longitudinal (45) est guidé à déplacement en va-et-vient sur un guide fixe de la machine dans la direction de l'axe y parallèle au transporteur longitudinal (21, 22) associé,
    b) le coulisseau longitudinal (45) est entraîné dans des directions opposées par un moteur pas à pas (48) à deux sens de rotation et par l'intermédiaire d'une courroie d'entraînement sans fin (46),
    c) le coulisseau longitudinal (45) porte un coulisseau transversal (52) qui est guidé à déplacement en va-et-vient dans la direction de l'axe x dans le coulisseau longitudinal (45) par des tringles de guidage (51) et porte à son extrémité tournée vers le transporteur longitudinal (21, 22) associé un socle (53) sur lequel sont situées des griffes de maintien (33, 34) qui reprennent transitoirement la nappe de fils (30),
    d) une bielle d'accouplement entraîne dans chaque position le coulisseau transversal (52) dans des directions alternées pendant le déplacement du coulisseau longitudinal (45),
    e) par l'intermédiaire d'une articulation (55), un organe d'accouplement (56) disposé sur une tringle d'accouplement (57) qui s'étend dans la direction de l'axe y de manière à pouvoir pivoter autour de celle-ci et coulisser dans le sens de sa longueur s'engage sur le coulisseau transversal (52) et
    f) la tringle d'accouplement (57) est située aux extrémités de deux bras oscillants (58a, 58b) entraînés de manière synchronisée et dont le déplacement contrôlé de va-et-vient a pour effet l'entraînement du coulisseau transversal (52).
  26. Machine à tricoter à chaîne dans laquelle les fils de trame sont extraits d'une réserve sous la forme de fils sans fin, sont déposés sur au moins deux transporteurs longitudinaux et sont amenés aux outils de tricotage, caractérisée par un dispositif de pose des fils de trame (30) sur les transporteurs longitudinaux (21, 22) selon l'une ou plusieurs des revendications 18 à 25.
  27. Machine multiaxiale destinée à la pose de couches de fils multiaxiaux en forme de bandes, de rubans ou de nappes, constituées de couches unidirectionnelles de fils déposées les unes au-dessus des autres, à l'aide de dispositifs qui extraient une couche unidirectionnelle de fils d'une réserve sous la forme de fils sans fin et la dépose sur deux transporteurs longitudinaux disposés en parallèle sur lesquels les couches unidirectionnelles sont amenées à un poste de liaison, caractérisée par des dispositifs d'application des couches unidirectionnelles de fils (30) sur les transporteurs longitudinaux (21, 22) selon l'une ou plusieurs des revendications 15 à 25.
EP20070114893 2007-08-23 2007-08-23 Procédé et dispositif destinés à déposer une couche de fils unidirectionnels sur des convoyeurs longitudinaux, procédé de présentation des fils de trame sur métiers à tricoter chaîne, et dispositif permettant de mettre en oeuvre ces procédés Not-in-force EP2028307B1 (fr)

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DE200750003318 DE502007003318D1 (de) 2007-08-23 2007-08-23 Verfahren und Vorrichtung zum Aufbringen einer unidirektionalen Lage aus Fäden auf Längsförderer, Verfahren zum Vorlegen von Schussfäden an Kettenwirkmaschinen sowie Vorrichtung zur Durchführung dieser Verfahren
ES07114893T ES2342682T3 (es) 2007-08-23 2007-08-23 Procedimiento y dispositivo para aplicar una capa unidireccional de hilos sobre transportadores longitudinales, procedimiento para presentar hilos de trama en maquinas tricotosas de urdimbre, asi como dispositivo para llevar a cabo este procedimiento.
EP20070114893 EP2028307B1 (fr) 2007-08-23 2007-08-23 Procédé et dispositif destinés à déposer une couche de fils unidirectionnels sur des convoyeurs longitudinaux, procédé de présentation des fils de trame sur métiers à tricoter chaîne, et dispositif permettant de mettre en oeuvre ces procédés
CN2008101910780A CN101525809B (zh) 2007-08-23 2008-08-22 敷设单向纱层的方法和装置以及向经编机喂入纬纱的方法

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DE102009055912A1 (de) 2009-11-27 2011-06-09 Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. Verfahren zur kontinuierlichen Herstellung von Stapelfasergelegen aus endlich langen Verstärkungsfasern mit gerichteter Faserorientierung
DE102010006543A1 (de) * 2010-02-01 2011-08-04 Karl Mayer China LTD., Jiangsu Vorrichtung zum Legen von Schussfadenscharen
DE102011089657B4 (de) * 2011-12-22 2014-01-02 Liba-Maschinenfabrik Gesellschaft mit beschränkter Haftung Vorrichtung zum Aufbringen einer Fadenlage auf parallel laufende Förderketten
CN104250874B (zh) * 2014-09-24 2016-04-13 江南大学 一种舌针经编机上的引纬装置
CN104652034B (zh) * 2015-02-06 2017-05-31 常州市宏发纵横新材料科技股份有限公司 经编机铺纬装置和铺纬方法
DE102017114133A1 (de) * 2017-06-26 2018-12-27 Hochschule Niederrhein Vorrichtung und Verfahren zum Vorlegen von Fäden, Textilmaschine
WO2019174662A2 (fr) * 2018-03-14 2019-09-19 Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen Dispositif et procédé destinés à tisser en chaîne
CN109081162A (zh) * 2018-07-25 2018-12-25 广东兆联纺织有限公司 多功能松布机

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