EP2695976B1 - Supply device for delivering opened fibres or flocked fibres to a transport device - Google Patents

Supply device for delivering opened fibres or flocked fibres to a transport device Download PDF

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Publication number
EP2695976B1
EP2695976B1 EP12199625.0A EP12199625A EP2695976B1 EP 2695976 B1 EP2695976 B1 EP 2695976B1 EP 12199625 A EP12199625 A EP 12199625A EP 2695976 B1 EP2695976 B1 EP 2695976B1
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EP
European Patent Office
Prior art keywords
supply
transport
roller
feed
fleece
Prior art date
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Application number
EP12199625.0A
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German (de)
French (fr)
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EP2695976A1 (en
Inventor
Johann Philipp Dilo
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.)
Oskar Dilo Maschinenfabrik KG
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Oskar Dilo Maschinenfabrik KG
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Publication date
Priority to EP12179382.2A priority Critical patent/EP2695982A1/en
Application filed by Oskar Dilo Maschinenfabrik KG filed Critical Oskar Dilo Maschinenfabrik KG
Priority to EP12199625.0A priority patent/EP2695976B1/en
Priority claimed from EP20130170105 external-priority patent/EP2695980A1/en
Publication of EP2695976A1 publication Critical patent/EP2695976A1/en
Application granted granted Critical
Publication of EP2695976B1 publication Critical patent/EP2695976B1/en
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/736Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/10Moulding of mats
    • B27N3/12Moulding of mats from fibres
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02Hoppers; Delivery shoots
    • D01G23/04Hoppers; Delivery shoots with means for controlling the feed
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02Hoppers; Delivery shoots
    • D01G23/04Hoppers; Delivery shoots with means for controlling the feed
    • D01G23/045Hoppers; Delivery shoots with means for controlling the feed by successive weighing; Weighing hoppers
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H11/00Non-woven pile fabrics
    • D04H11/08Non-woven pile fabrics formed by creation of a pile on at least one surface of a non-woven fabric without addition of pile-forming material, e.g. by needling, by differential shrinking

Description

  • The invention relates to a feeding device for feeding dissolved fibers or fiber flakes onto a transport device.
  • In the production of fiber webs, fiber flocks are usually first delivered from a Faserflockenspeiser to a transport device, which in the form of a Faserflockenmatte in a first alternative to a pile producer, preferably a carding, in a second alternative directly to an aerodynamic web forming agent, or in a third alternative directly to a solidification machine, such as a needle machine, further transported.
  • In the first alternative, the pile produced in the pile producer (which can also be referred to as a single-layer or two-layer nonwoven) is then fed to a fleece layering machine which places a multilayer fleece from the pile web by cross-lapping. This multi-ply web can then be consolidated by suitable consolidation machines, for example by needling. Overall, it is usually desirable to produce a nonwoven fabric with very high uniformity. For this purpose, there are corresponding intervention possibilities at different points of the plant. For example, in the area between fiber flake feeders and pile producers, e.g. the weight of the fiber flake mat measured by means of a belt weigher and based on this the feed rate of the pile generator are controlled so that always passes an identical amount of fiber material per time interval in the pile generator.
  • However, such a belt weigher can determine only the average mass of the fiber flake mat, distributed over the width of the transport device and a certain length in the transport direction. Therefore, only a coarse homogenization of the fiber flake stream entering the pile fabricator is provided by this balancing process, while different basis weights of the fiberglass mat across the width of the fiberglass mat must be accepted.
  • In the aforementioned second and third alternative web formation has been tried by various station internal settings and structural details, the delivery of the fiber flakes to a fiber flake mat in the fiber flake feeder and the delivery of the dissolved fibers to form a nonwoven fabric in the aerodynamic nonwoven forming machine over the length and width of the fiber flake mat or the fleece as evenly as possible. The results are often in need of improvement.
  • In addition to the homogenization of fiber flake mat or nonwoven fabric, it may also be advantageous in other applications if the fiber flake mat or the fleece has a predetermined uneven transverse profile or longitudinal profile.
  • The present invention has for its object to provide a feeding device that can be used at various points of a web forming system and allows accurate location and quantity dosage of the fiber material.
  • This object is solved by the features of claim 1.
  • According to the invention, the feeding device for supplying dissolved fibers or fiber flakes to a transport device which serves for further transport of the formed web or fiber flake mat in a transport direction, a plurality of individually controllable feed rollers and at least one cooperating with the feed rollers driven opener roller. The feeding device comprises a plurality of horizontally juxtaposed feed segments such that each feed segment is assigned its own feed roller. In this way, fiber material can be targeted to the transport device, be it as a starting material in the formation of a nonwoven or a fiber flake mat, or in the sense of a subsequent adaptation of the profile of an existing fiber base product.
  • Preferably, each draw-in roller is fed with its own roving or its own fiber fleece strip. As a result, the amount of material per feed segment is particularly precisely metered.
  • Preferably, each dispensing segment is associated with a dispensing device for storing and dispensing a roving or a nonwoven strip such that each feed roller removes the roving provided by the associated dispenser or the nonwoven strip. In this way, a high spatial resolution is achieved even when feeding the dosing into the feeder.
  • As an alternative to the above-mentioned dispensing device, the feed device can also have a fiber flute shaft as the material reservoir for the feed rollers.
  • The local dissolution of the feed of the dissolved fibers or fiber flakes is determined essentially by the width of each feed segment. It is preferred that each feed segment has a width of between 5 and 100 mm, preferably between 15 and 30 mm, particularly preferably between 20 and 25 mm.
  • In a first concrete embodiment of the feeding device, each feed roller on a set with respect to a direction of rotation of the feed roller rearwardly projecting teeth, wherein the opening roller is driven in the same direction of rotation as the feed rollers and has a set with respect to this direction forward protruding teeth. Here, the opener roller, the fiber material is fed from below obliquely.
  • Alternatively, in a second embodiment of the feeder, each pickup roller may have a clothing with teeth projecting rearwardly with respect to a direction of rotation of the pickup roller, the opener roller being driven in a second rotational direction opposite to the direction of rotation of the pickup rollers, and a clothing forward with respect to the second rotational direction has protruding teeth. In this case, the opener roller is fed to the fiber material from obliquely above, taken over by the opener roller and guided in a semicircle until it can fall into the discharge shaft.
  • Preferably, exactly one opener roller is provided which extends transversely to the transport direction of the transport device and horizontally over all feed segments. Thus, the opener roller can simultaneously remove the fiber material provided by each draw-in roller and then deliver it to the desired position of the fleece.
  • The cross profile of the nonwoven to be produced or the fiber flake mat is best influenced if the feed segments are arranged side by side in a direction transverse to a transport direction of the transport device.
  • To further increase the local resolution of the supply of the fiber material, at least one further type of roller or conveyor belt can be assigned to each feed segment, wherein the rollers or conveyor belts of the same type of feed segments in one Direction transverse to a transport direction of the transport device are arranged side by side and are controlled separately from each other.
  • Preferably, each feed roller is driven by a servomotor. The use of a separate servo motor for each pickup roller ensures the independent control of each feed roller and thus a high-precision profile adjustment of the web or the fiber flake mat by means of individually controlled Zuführsegmente.
  • When a dispenser for a roving or a nonwoven strip is used as the material reservoir, a storage roller is preferably arranged between the dispenser and the pickup roller of each feed segment, extending transversely to the transport direction of the transport device and horizontally across all the feed segments, and around the one turn of each of Dispenser provided fiber roving or each nonwoven strip is wound. In this way, the feed rollers do not have to remove the fiber material directly from the dispenser, but can do so at a fixed location on the storage roller.
  • A particularly preferred embodiment of the present invention is also present when two feed devices according to the invention are connected in series with one another to form a web formation machine.
  • In this case, it is preferred if the feed segments of the two feed devices have the same width and the feed segments of the second, downstream feed device are offset with respect to the feed segments of the first feed device, preferably by half the width of the feed segments. In this way, can be produced by the double Faserzuführprozess a particularly uniform fleece.
  • The nonwoven forming system may have, between the first and the second downstream arranged feeding device, a measuring device for measuring the basis weight of the nonwoven over its transverse width to the transport direction of the transport device width in a measuring range of the transport device for determining a cross profile and longitudinal profile of the nonwoven, and also a control or control means adapted to control the second feeding device based on the results of the measuring device so that the second feeding device for homogenizing the nonwoven feeds dissolved fibers or fiber flakes onto detected thin spots of the web, or in that the second feeding device supplies in a targeted manner fibers or fiber flakes dissolved in order to form a desired uneven transverse profile and / or longitudinal profile of the nonwoven fabric with thin spots and thick places. As a result, the web formation is further refined.
  • Further features and advantages of the present invention will become apparent from the following description with reference to the drawings.
  • Fig. 1
    FIG. 12 is a side cross-sectional view of one embodiment of a device for forming a uniformized or profiled fiber flake mat having a first one. FIG. Embodiment of a feeding device according to the invention, which is used here as a profile changing device of a previously produced Faserflockenmatte;
    Fig. 2
    is a side cross-sectional view of a web forming system with two successive feeders according to the invention of the embodiment from Fig. 1 ;
    Fig. 3
    is a side cross-sectional view of a web forming system with two successively connected feed devices according to the invention of a further embodiment;
    Fig. 4
    is a side cross-sectional view of a web forming system with two successively connected feed devices according to the invention of a further embodiment;
    Fig. 5
    is a side cross-sectional view of a web forming system with two successively connected feed devices according to the invention of a further embodiment;
    Fig. 6
    is a side cross-sectional view of a web forming system with two successively connected feed devices according to the invention of a further embodiment;
    Fig. 7
    is a side cross-sectional view of a web forming system with two successively connected feed devices according to the invention of a further embodiment; and
    Fig. 8
    is a side cross-sectional view of a web forming system with two successive feeders according to the invention another embodiment.
  • In Fig. 1 a device for forming a uniform or profiled fiber flake mat is shown. The device comprises a material dispenser, which is designed here as a fiber flake feeder 2. Behind the device, the fiber flake mat produced is fed to the catchment area of a pile generator 3, in particular a carding machine. Similarly, the fiber fluff mat 12 produced may be directly exposed to an aerodynamic web former (not shown) or a consolidation machine 50 (see FIG Fig. 2 ).
  • The Faserflockenspeiser 2 are fiber flakes on a discharge belt 4 from which is formed circumferentially and around a plurality of guide rollers 6, of which only one is shown in the drawing, is stretched.
  • For compacting the fiber flake material output from the fiber flake feeder 2, an upper roller 8 can also be arranged in the exit region of the fiber flake feed 2, which is driven in opposite directions to the discharge belt 4 and thus moves and compacts the fiber flake mat together with the discharge belt 4 in the direction of a circulating transport belt 10. In the illustrated example, the discharge conveyor 4 and the conveyor belt 10 together form a transport device which ensures the further transport of the fiber flake mat 12.
  • In the example shown here, the transport device 4, 10 connects the Faserflockenspeiser 2 and the pile generator 3. It is also conceivable that the conveyor belt 10 extends directly below the Faserflockenspeisers 2 (see the other figures) and thus the discharge belt 4 is omitted, or that the transport device has other than the sections and elements 4, 10 shown.
  • On the transport device 4, 10, the fiber flake material is advanced as a fiber flake mat 12 with a variable speed v in the direction of the catchment area of the pile generator 3 and thus in the transport direction. The conveyor belt 10 can also have a belt scale which determines an average weight of the fiber flake mat 12 in a flat weighing area, which has a certain length and extends over the entire width of the fiber flake mat 12. On this basis, the transport speed v of the transport device and thus at the same time the intake speed of the pile generator 3 can be controlled accordingly so that always a substantially uniform mass flow of fiber flake material reaches the pile generator 3 per time interval.
  • In addition, a measuring device 14 is provided which measures the weight per unit area of the fiber flake mat 12 over its transverse width to the transport direction in a measuring range of the transport device 4, 10, thus the cross profile and due to the movement of the transport device 4, 10 and the longitudinal profile of the fiber flake 12, in particular thin areas and / or thick areas of the fiber flake mat 12 to determine. The measuring device 14 has a plurality of measuring segments transversely to the transport direction of the fiber flake mat 12 and carries out its own measurement in each measuring segment. In this way, thin spots or thick places can be determined two-dimensionally, ie in the longitudinal and in the transverse direction. The width of such a measuring segment is between 5 and 100 mm, preferably between 15 and 30 mm, more preferably between 20 and 25 mm. Such a measuring device can either be used in addition to the belt scale or take over their function.
  • In the in Fig. 1 In the illustrated embodiment, the measuring device 14 is designed as a series of transversely to the transport direction of the fiber flake mat 12 and measuring wheels 16 arranged horizontally next to each other. In the illustrated lateral cross-sectional view thereof only a measuring wheel 16 can be seen. Each of these measuring wheels 16 is deflected independently of the other and connected to a corresponding evaluation device 18, which detects the deflection of the associated measuring wheel 16, which is due to the different thickness or the different basis weight of the fiber flake mat 12. For example, position sensors for measuring the height of the measuring wheels 16 or their carriers or rotary angle meters for determining the angle of rotation of the measuring wheels 16 or their carriers come into consideration as the evaluation device 18. This can be on the respective surface weight of the fiber flake mat 12 can be closed in the associated measuring segment.
  • Alternatively, the measuring device 14 may also be configured as another form of a mechanical measuring device. It is also possible to design the measuring device 14 as a radiometric measuring device. In this case, a radiometric measuring probe is arranged either in each measuring segment, which determines the surface weight of the fiber flake mat 12 in the respective measuring segment by means of radiometric measurements, or a single radiometric measuring probe is provided which can be moved transversely across the width of the fiber flake mat 12 and continuously or in certain measuring distances, the basis weight of the fiber flake mat 12 receives. Likewise, a combined use of both a radiometric and a mechanical measuring device 14 is possible.
  • The results of the measuring device 14 are transmitted to a control or regulating device 20, which controls a feed device 22, which can also be referred to as a profile changing device in the present application, on the basis of the results of the measuring device 14. The feed device 22 is arranged in a profile change region of the transport device 4, 10 downstream of the measuring range. The controller 20 controls the feeder 22 such that the feeder 22 either supplies dissolved fiber or fiber flakes to the determined thin spots of the fiber flake mat 12 to even out the fiber flake mat 12, and / or that the feeder 22 forms a desired non-uniform cross profile and / or. or longitudinal profiles of the fiber flake mat 12 with thin points and thick spots dissolved fibers or fiber flakes specifically supplies.
  • The controlled feeding of dissolved fibers or fiber flakes is effected by separate control of a plurality of feed segments of the feed device 22 arranged transversely to the transport direction and horizontally next to one another. The width of such a feed segment preferably corresponds to the width of the measuring segments. It is thus in the range of between 5 and 100 mm, preferably between 15 and 30 mm, more preferably between 20 and 25 mm.
  • In the in Fig. 1 illustrated embodiment, the respective feed segments of the feeder 22 are arranged transversely to the transport direction and thus in the side view not visible in the drawing. Each feeder segment is associated with a dispenser 24 for storing and dispensing a roving 26 or a nonwoven strip. In the in Fig. 1 illustrated embodiment, the dispensing device 24 is designed as a coil, but it can also be designed as a spinning can or the like. The roving 26 or nonwoven strip extends from the dispenser 24 to a preferably rubberized storage roll 28 extending transversely of the transport direction and horizontally preferably across all feed segments, and one turn of each roving 26 or nonwoven strip provided by the dispenser 24 is adjacent to each other Storage roller 28 wound. The storage roller 28 is driven in one direction of rotation (see the corresponding arrow in the drawing), preferably by means of a servomotor 30 and also preferably continuously at a relatively slow speed. In certain embodiments, the storage roller 28 may also be omitted.
  • In the in Fig. 1 illustrated preferred embodiment is an integral storage roller 28 which simultaneously receives the different strands of the roving 26 and the nonwoven strip of all feed segments side by side. Likewise, however, there may be a separate storage roller per feed segment.
  • Each feed segment is also associated with a driven with a servo motor 34, also in the same direction of rotation rotating feed roller 32 assigned. The feed roller 32 pulls the respective provided by the associated dispenser 24 roving 26 or the nonwoven strip, either with the interposition of the storage roller 28 or directly. Although each feed segment has its own feed roller 32, only one feed roller 32 can be seen due to the series arrangement in the drawing. Each feed roller 32 preferably has a clothing with respect to the direction of rotation rearwardly projecting teeth.
  • A particular advantage of the interposition of the storage roller 28 is that the storage roller 28 slips under those fiber ends 26 or non-woven fabric strips, which are only loosely wound around them. This applies accordingly to all Zuführsegmente in which the feed roller 32 is not driven at all or slower than the storage roller 28. Only when a feed roller 32 runs faster than the storage roller 28, the corresponding winding of the roving 26 or the nonwoven strip to the Storage roller 28 pulled tight and retracted the material accordingly.
  • The feed rollers 32 may have all possible speed profiles, including a plateau profile (e.g., in the form of a truncated pyramid) with equal but different length plateaus, depending on the desired output of fiber material.
  • The co-moving from the feed rollers 32 roving 26 or the nonwoven strip is transported to a Öffnerwalze 36, which is preferably integrally formed and extending transversely to the transport direction and horizontally across all Zuführsegmente. Likewise, however, there may be a separate opening roll per feed segment.
  • The opener roller 36 is driven in the illustrated example in the same direction as the feed rollers 32. In addition, the opener roller 36 preferably has a clothing with respect to the direction of rotation protruding teeth, whereby it opens the twisted or compressed fiber flake material of the roving 26 and the fiber fleece strip particularly well so that loose fiber flakes or even fine fibers are peeled off. These fall into a corresponding discharge chute 38 and from there guided on the fiber flake mat 12. It can also be several discharge shafts 38 side by side provided for the different Zuführsegmente.
  • If desired, a cleaning roller 40 can still be arranged in the region of the dispensing shaft 38, which strips off the fiber flakes adhering to the teeth of the opening roller 36.
  • In the illustrated example case, the centers of the feed rollers 32 and the Öffnerwalze 36 are arranged on a horizontal line. In addition to the arrangement shown but are still many design options.
  • If desired, the result obtained by the feeding device 22 can be checked further downstream by means of a second measuring device 42. The second measuring device 42 may be designed in the same way as the measuring device 14, that is, it may have, for example, a plurality of measuring wheels 44 and a plurality of evaluation devices 46.
  • It is also possible to arrange a further feeding device 22 behind the second measuring device 42 in the event that the desired uniformity or the desired transverse profile or longitudinal profile of the fiber flake mat 12 is not achieved in one step.
  • In the operation of the feed device 22, the control or regulating device 20 must therefore in addition to the local arrangement of the measuring segments or the Zuführsegmente and the respective measurement data and the distance a between measuring range and profile change range and the respective speed v of the transport device, here the conveyor belt 10, for Consider control.
  • In the profile change then the respective feed roller 32 of the associated feed segment is driven at the right time at a certain speed and provides additional fiber or fiber flake material to the opening roll 36, which then reaches the right spot of the fiber flake mat 12 in the desired dosage.
  • There are also other embodiments of the feeding into consideration. For example, various flute shafts may be provided, which correspond to the number of feed segments and are fed selectively with loose fiber flakes (for example, branched off before the fiber flake feeder 2).
  • Examples of other possible embodiments of the invention are described below.
  • In the in Fig. 2 The apparatus for forming a nonwoven fabric illustrated includes two feed devices 22, 76 according to the invention. In comparison with the embodiment of Fig. 1 Now, the material dispensing device is configured as a first feeder 76. Both the first feeding device 76 and the second feeding device 22 substantially correspond to those in FIG Fig. 1 In this way, the material dispenser and profile changing device are formed substantially the same. A measuring device 14 can again be arranged between the two feed devices 76, 22, which, like the associated control or regulating device 20, has been omitted from this figure for reasons of clarity. However, the control can also be dispensed with, in particular if the feed segments of the second feed device 22 are opposite the feed segments of the first feed device 76 are laterally offset, for example, by half the width of a feed segment. In this case, the laterally offset, segmented supply of fibrous material in the second feeder 22 can exactly compensate for the thin spots in the web 78 due to the segmented supply of fibrous material in the first feeder 76 when the operating parameters of the two feeder devices 22, 76 are set identical.
  • The pre-web formed in the first feeder 76 may have a relatively uniform profile at high spatial resolution of the feeder segments, but may also have a very wavy cross-section. In any case, with the device shown here, in which both the first feeder 76 and the second feeder 22 each consist of juxtaposed Zuführsegmenten, each fed by its own roving 26 or its own fiber fleece strip, with high accuracy, a fleece 78 with the desired profile properties are formed.
  • In principle, the feed device 76 or 22 does not have to be aligned transversely to the transport direction of the conveyor belt 10, but can also be aligned in the transport direction of the conveyor belt 10. In such a case, the feeding device 76 or 22 is preferably transversely to the transport direction of the conveyor belt 10 and over the maximum width and above the fiber flake mat 12 to be laid (not shown). Again, the movable feeder 76 or 22 more in the transport direction of the conveyor belt 10 and horizontally juxtaposed Zuführsegmente, which are controlled separately.
  • If, for example, only the second feed device 22 is configured as a transversely movable feed device, this arrangement succeeds in delivering substantially longitudinally oriented fibers to the conveyor belt 10 in the first feed device 76 and delivering substantially transverse oriented fibers to the conveyor belt 10 in the second feed device 22 , so that the material properties of the fiber flake mat 12 or the fleece 78 can be influenced in a targeted manner. In this way, fiber flake mats 12 or webs 78 can be formed, which are not only particularly uniform or are particularly precisely profiled, but also a different orientation of the fibers or fiber flakes in different areas or layers of the fiber flake mat 12 and the web 78th exhibit.
  • It is important here that the movable feed device 22 has a moving material reservoir or the like in order to join in the lateral deflections of the feed device 22. In the case of using a device for dispensing felts 26 or nonwoven strips, as in Fig. 1 and 2 shown, in a transversely movable feed device, only the feed device 22 including feed roller 32 can be moved transversely, while the dispenser 24 remains stationary. If present, the storage roller 28 can either be moved with the feeder 22 or remain stationary. Corresponding slack storage between said elements then provide the necessary material buffer for the transverse travel of the feeder 22nd
  • In Fig. 3 to 8 further embodiments of the device according to the invention are shown. In this case, for reasons of clarity, any elements measuring device 14 and control or regulating device 20 are not shown. However, it should be clear that the second supply device 22 can be controlled by the control or regulating device 20 on the basis of the measurement result of the measuring device 14, as in the previously described embodiments.
  • In Fig. 3 the material dispensing device is configured again as a feed device 84 or web forming device according to the invention, which dispenses a first quantity of fiber material onto the conveyor belt 10, which serves as the basis for forming the web 78. The first feed device 84 has a plurality of feed rolls 102 arranged axially next to each other, one of which is assigned to a feed segment of the feed device 84. The width of the individual feed segments is preferably identical to the width in the previous examples. Each feed roller 102 is driven by its own servo motor 104. In the illustrated lateral cross-sectional view, only a feed roller 102 and a servo motor 104 can be seen. The fiber material is drawn in the direction of arrow A from the feed rollers 102 in a controlled manner and thus passes under the overhead trough 106 therethrough. This supports the transport of the supplied fiber material to a Öffnerwalze 108 which cooperates with the feed rollers 102 and strips individual fiber flakes or individual fibers from the feed rollers 102. The fiber material fed in the direction of the arrow A can be drawn in directly from a fiber flute shaft. Preferably, however, the fiber material is supplied in the form of fiber slivers 26 or nonwoven strips, for example by means of in Fig. 2 shown elements for feeding the roving 26 or the nonwoven strip to the feed rollers 32 shown there. While in the example of the Fig. 3 an overhead trough 106 is provided is and the fiber material is fed from the feed rollers 102 obliquely from above into the space between the feed rollers 102 and opening roller 108, this, as in Fig. 2 shown, also at any time from diagonally down. Only the relative direction of rotation between the feed rollers 102 and the opener roller 108 would then be different, since the feed rollers 102 would then move in the same direction of rotation as the opener roller 108th
  • Depending on the distance between the feed rollers 102 and the opening roller 108 and the speed difference between the feed rollers 102 and the faster opener roller 108 opens the opening roller 108, the fiber material of the roving 26 or the nonwoven strip or the fiber flakes coming from the shaft different degrees towards fiber flakes or even to single fibers, which subsequently fall down in the feeder 84.
  • For the definition of the fall distance corresponding guide elements 110 may be provided. The fiber material dissolved by the opener roller 108 per feed segment finally reaches a gap between two screen rollers 112, which are preferably driven at the same speed but in the opposite direction. These screen rollers 112 direct the fiber material in the feeder 84, for example, with the aid of another trough 114, on the conveyor belt 10. The distance and the relative altitude of the two screen rollers 112 are variably adjustable.
  • In the exit area of the feeder 84, a pinch roller 116 may be provided which rotates at the same speed as the conveyor belt 10 and compacts the formed web 78 between itself and the conveyor belt 10. If the pinch roller 116 and the conveyor belt 10 have a higher speed than the screen rollers 112, then in the area between the screen rollers 112 and the pinch roller 116, the web 78 is stretched in the transport direction of the conveyor belt 10, which in the web 78 to an even stronger orientation of the fibers in the longitudinal direction, ie along the transport direction of the conveyor belt 10 is used.
  • The profile changing device is also configured as a second feeding device 22 or as a web forming device, which has a plurality of Einzelvliesbildungsstellen. The structure of the second feeding device 22 is substantially identical to the structure of the first feeding device 84 and will therefore not be described in detail. The feeding direction of the Fiber material in the feeder 22 is in the illustrated example in the direction of arrow B. The individual elements which have already been described with reference to the first feeder 84, here have the following reference numerals: feed rollers 202, servomotors 204, overhead trough 206, opener roller 208, Guide elements 210, screen rollers 212, lower trough 214 and pinch roller 216.
  • In the Fig. 3 The second feeding device 22 shown may also be combined at any time, as with the second feeding devices 22 described in the following figures, with another material dispensing device, such as a conventional fiber flake feeder 2, as shown in FIG Fig. 1 illustrated, or a first feeder 76 from Fig. 2 ,
  • Finally, it is also possible in the Fig. 2 to 8 illustrated first feeders 76, 84 to combine with other profile changing devices.
  • The feeding device according to the invention can be used in almost every area of a device for forming a fleece or a fiber flake mat, primarily to compensate for irregularities or for the desired profile formation. In addition to the locations shown, a possible site of use is, for example, the area between carding machine and web laying machine or between web laying machine and consolidation machine. It is also conceivable to arrange more than two feed devices according to the invention in succession.
  • In the Fig. 4 illustrated embodiment of the apparatus for forming a nonwoven is similar to the embodiment of Fig. 3 but with two differently configured feeders 84, 22. Again, the fiber material in the direction of arrow A by means of individually driven, over the width of the web to be laid 78 axially juxtaposed feed rollers 102 is retracted into the first feeder 84. The feed rollers 102 are in this case somewhat obliquely below the opener roller 108, and as a guide element 110, a perforated plate is provided in this case. The two screen rollers 112 are again driven in opposite directions, wherein in the illustrated embodiment additionally suction devices 118 for sucking the screen rollers 112 are shown. The conveyor belt 10 is configured in the illustrated embodiment as a screen belt, which is also under-sucked by means of a suction device 120 so as to the stripped from the opener roller 108 fiber material to the desired region of the conveyor belt 10 suck. In comparison with the embodiment of Fig. 3 In addition, the left screen roller 112 is arranged closer to the conveyor belt 10, so that the lower trough 114 can be omitted.
  • The second feeding device 22 in FIG Fig. 4 is configured substantially identical to the first feeding device 84. The fiber material is introduced in the direction of arrow B in the feeder 22. The suction devices for the screen rollers 212 are designated by reference numeral 218, and the suction device for sucking the conveyor belt 10 in the region of the feed device 22 is designated by reference numeral 220. Of course, the pinch rollers 116, 216, not shown here, could be made from the embodiment Fig. 3 also be used.
  • In the Fig. 5 illustrated embodiment of the first feeder 84 and the second feeder 22 has in the catchment area (above the arrows which are to denote the falling fiber material) also a plurality of juxtaposed feed rollers 102 and a Öffnerwalze 108 (as in Fig. 8 or 9), which are not shown here anymore.
  • The counter-rotating screen rollers 112 are in the case of Fig. 5 partially entangled by screen belts 122, which are guided by the screen rollers 112 down and there are guided around a respective smaller guide roller 124. The guide rollers 124 are disposed near the surface of the conveyor belt 10 and define a discharge gap of the first feeder 84. The conveyor belt 10 is again configured as a screen belt, but this time at the exit of the feeder 84, two opposing pinch rollers 116 are arranged, one above the formed web 78 and one below the upper run of the conveyor belt 10. The pinch rollers 116 are driven in opposite directions and run at the same speed as the conveyor belt 10. When the speed of the pinch rollers 116 and the conveyor belt 10 is higher than the speeds V1 and V2 of the screen rollers 112 takes place again an extension of the laid web 78 in the longitudinal direction, ie in the transport direction of the conveyor belt. This leads to an increase in the fiber longitudinal orientation in the fleece 78. It is also possible to omit the two pinch rollers 116 at this point, if no stretching is to take place. The distance between the screen belts 122 is variable, as are the speeds V1 and V2 are adjustable separately.
  • The second feeder 22 is in the example of the Fig. 5 again in principle identical to the first feed device 84, wherein the two rotating screen belts have the reference numeral 222 and the two lower guide rollers have been given the reference numeral 224.
  • In the Fig. 6 illustrated embodiment of the apparatus for forming a nonwoven fabric is in the upper region to the two screen rolls 112 substantially identical to the embodiment of Fig. 3 , Below the two screen rollers 112, however, a stretching device is arranged. The stretching device in this case comprises an upper star roller 126 or garnished roller with a counter-pressure plate 128 opposite it, preferably spring-mounted, defining therebetween a first nip for the fiber material, and a lower star roller 130 or garnished roller and a lower, preferably resilient mounted, counter-pressure plate 132 which is opposite to the lower star roller 130 and defines with this a second nip. Preferably, the two star rollers 126 and 130 are disposed on opposite sides of the filling channel. A stretching of the fiber material in the filling channel takes place when the rotational speed of the lower star roller 130 is higher than the rotational speed of the upper star roller 126. The speed of the lower star roller 130 preferably corresponds to the speed of the conveyor belt 10. By the drawing finds a stronger expression of Longitudinal orientation of the fibers instead, so that on the conveyor belt 10 finally a web 78 is deposited with more along the transport direction of the conveyor belt 10 oriented fibers. The shape and arrangement of the elements for stretching can of course be varied in many ways here. For example, to define each nip also a pair of nip rollers (smooth, rubberized or garnished) or star roller pair can be used.
  • In the Fig. 6 The second feeding device 22 described above is designed essentially identical to the first feeding device 84. The feeding device 22 is supplied with the fiber material in the direction of the arrow B, and which, in comparison with the embodiment of FIGS Fig. 3 newly added elements are upper star roller 226, upper platen 228, lower star roller 230, and lower platen 232.
  • In the Fig. 7 shown first feeder 84 substantially corresponds to the embodiment of Fig. 3 , wherein the two screen rollers 112 are replaced by other guiding and stretching elements. On the left outer edge of a screen belt 134 is arranged around a plurality of guide rollers 136 around such that there is an inclined guide surface for the fiber material defined in the direction of the conveyor belt 10. At least one of the guide rollers 136 is driven, so that the screen belt 134 moves at the same speed. In addition, the screen belt 134, as in Fig. 7 shown, with a suction device 138 under-sucked. The inclined guide surface of the screen belt 134 opposite an upper disk roller 140 is arranged, which is driven at the same speed as the screen belt 134 and together with the screen belt 134 defines a first clamping point for the transported fiber material. Diagonally below this pinch roller 140, a star roller 142 is arranged, which in turn forms a second clamping point for the fiber material with the conveyor belt 10. Subsequent to the star roller 142, a further pinch roller 144 may be provided for compressing the web 78.
  • A stretching device is provided when the speed of the star roller 142, which corresponds to the speed of the conveyor belt 10, is greater than the speed of the screen belt 134 and pinch roller 140. In this way, as described in detail in the embodiments above, the longitudinal orientation the fibers of the web 78 reinforced. In this embodiment, too, there are manifold possibilities for the design of the individual components, which are within the scope of the knowledge of the person skilled in the art.
  • The second feeding device 22 of the Fig. 7 is essentially identical to the first feeder 84 constructed. The compared with Fig. 3 newly added elements are the screen belt 234, the idler rollers 236, the suction device 238, the pinch roller 240, the star roller 242 and the optional lower pinch roller 244.
  • In the Fig. 3 to 7 Feed rollers 102, 202 shown are each provided with sets whose teeth are directed in the direction of rotation of the feed rollers 102, 202 forward. It is also possible or even preferred that the teeth of the sets of feed rollers 102, 202 are directed in the direction of rotation to the rear. It can also be used completely different trimmings.
  • In the Fig. 8 illustrated embodiment of the apparatus for forming a nonwoven fabric comprises a second feeding device 22, the lower part, from the screen rollers 212 down, the embodiment of Fig. 3 equivalent. However, the catchment area is changed in contrast. The fiber material is in this embodiment above the feed rollers 202 in the direction of arrow B and then conveyed by the opener roller 208, which runs in the same direction of rotation as the feed rollers 202, along the overhead trough 206. The overhead trough 206 may also be configured in two parts. After a half turn of the opener roller 208, the fiber material drops into the discharge chute and finally passes between the screen rollers 212. In order to assist the detachment process of the fiber material from the opening roller 208, an air flow generator 250 can be used, which from the top generates an air flow at the top Opener roll 208 passes (aerodynamic web formation).
  • The first feeding device 84 of the Fig. 8 substantially corresponds to the delivery device 84 Fig. 3 , In addition, here in the intermediate region between feed rollers 102 and opener roller 108 indicated by the arrows, an air flow from above, which supports the detachment of the fiber material from the opener roller 108 down. Such a measure can also be used in all embodiments of the Fig. 3 to 7 be applied.
  • The pre-web formed in the first feeder 84 may have a relatively uniform profile, but may also have a very wavy cross-section. In any case, with the device shown here, in which both the material dispensing device and the profile changing device each consist of a feed device according to the invention with juxtaposed Zuführsegmenten, which are preferably each fed by its own roving 26 or its own fiber fleece strip, with high accuracy, a web 78 with the desired profile properties are formed. Optionally, the delivery segments of the delivery device 22 may be laterally offset from the delivery segments of the delivery device 84, for example, by half the width of a delivery segment.
  • In the embodiments of the Fig. 3 to 8 So far only the feed rollers 102, 202 have been described as individually controllable, axially juxtaposed elements, of which each feed roller 102, 202 is associated with a feed segment of the feeder 84 and the feeder 22, respectively. But there are many more elements of the Fig. 3 to 8 be shown segmented, ie juxtaposed and individually controllable present, each feed segment is assigned a respective segment of these elements. This applies, for example, to the screen rollers 112, 212, the screen belts 122, 222, the star rollers 126, 130, 226, 230 and the screen belts 134, 234 and the clamping rollers 140, 240 and star rollers 142, 242 opposite thereto.
  • All of the sheets, strips and rollers shown as sieve elements in the figures can be back-sucked or passively pass air through the openings. In part, these elements can also be replaced by full-surface, equivalent elements.
  • Likewise, the nature and design of the rollers, belts and troughs used and the relative geometric arrangement of the individual parts in the illustrated embodiments can be modified by the person skilled in the art to the respective intended use. In particular, the distance between the rollers and belts in the embodiments of Fig. 3 to 7 is not true to scale and also variably adjustable. The described embodiments and the schematic sketches are intended to represent only the basic principle of the inventive idea.
  • Finally, the elements of the individual embodiments of the feeders 22, 76 and 84 can be combined with each other almost arbitrarily.

Claims (15)

  1. Supply device (22, 76, 84) for delivering opened fibres or flocked fibres to a transport device (4, 10) which serves for the further transport of a formed fleece (78) or flocked fibre mat (12) in a transport direction wherein the supply device (22, 76, 84) has at least one driven infeed roller (32, 102, 202) and at least one driven opening roller (36, 108, 208) which interacts with the infeed roller (32, 102, 202), characterised in that the supply device (22, 76, 84) has a plurality of supply segments arranged horizontally next to one another, and a plurality of individually controllable infeed rollers (32, 102, 202) such that each supply segment is assigned its own infeed roller (32, 102, 202).
  2. Supply device (22, 76, 84) according to claim 1 characterised in that each infeed roller (32, 102, 202) is supplied with its own fibre roving (26) or a suitable fibre fleece strip.
  3. Supply device (22, 76, 84) according to claim 2 characterised in that each supply segment is assigned a dispensing device (24) for storing and delivering a fibre roving (26) or a fibre fleece strip so that each infeed roller (32, 102, 202) draws off the fibre fleece strip or the fibre roving (26) which is prepared by the associated dispensing device (24).
  4. Supply device (22, 76, 84) according to claim 1 characterised in that it has a flocked fibre shaft as the material reservoir for the infeed rollers (32, 102, 202).
  5. Supply device (22, 76, 84) according to one of the preceding claims characterised in that each supply segment has a width of between 5 and 100 mm, preferably between 15 and 30 mm, more especially between 20 and 25 mm.
  6. Supply device (22, 76, 84) according to one of the preceding claims characterised in that each infeed roller (32, 102, 202) has a fitting with teeth which project backwards relative to the rotational direction of the infeed roller (32, 102, 202), wherein the opening roller (36, 108, 208) is driven in the same rotational direction as the infeed rollers (32, 102, 202) and has a fitting with teeth projecting forwards relative to this rotational direction.
  7. Supply device (22, 76, 84) according to one of claims 1 to 5 characterised in that each infeed roller (32, 102, 202) has a fitting with teeth which project backwards relative to a rotational direction of the infeed roller (32) wherein the opening roller (36, 108, 208) is driven in a second rotational direction which is opposite the rotational direction of the infeed rollers (32, 102, 202), and has a fitting with teeth which project forwards relative to the second rotational direction.
  8. Supply device (22, 76, 84) according to one of the preceding claims characterised in that just one opening roller (36, 108, 208) is provided which extends crosswise to a transport direction of the transport device (4, 10) and horizontally over all the supply segments.
  9. Supply device (22, 76, 84) according to one of the preceding claims characterised in that the supply segments are arranged side by side in a direction crosswise to the transport direction of the transport device (4, 10).
  10. Supply device (22, 76, 84) according to one of the preceding claims characterised in that each supply segment is assigned at least one further type of rollers (112, 126, 130, 140, 142, 212, 226, 230, 240, 242) or conveyor belt (122, 134, 222, 234), wherein the rollers (112, 126, 130, 140, 142, 212, 226, 230, 240, 242) or conveyor belts (122, 134, 222, 234) of the same kind of all the supply segments are arranged side by side in one direction crosswise to the transport direction of the transport device (4, 10), and can be controlled separately from one another.
  11. Supply device (22, 76, 84) according to one of the preceding claims characterised in that each infeed roller (32, 102, 202) is driven by a servo motor (34, 10, 204).
  12. Supply device (22, 76, 84) according to claim 3 characterised in that between the dispensing device (24) and the infeed roller (32, 102, 202) of each supply segment is a storage roller (28) which extends crosswise to the transport direction of the transport device (4, 10) and horizontally over all the supply segments, and about which is would one winding of each fibre roving (26) prepared by the dispensing device (24), or of each fibre fleece strip.
  13. Fleece formation unit with two supply devices (22, 76, 84) according to one of the preceding claims connected in series.
  14. Fleece formation unit according to claim 13 characterised in that the supply segments of the two supply devices (22, 76, 84) have the same width and the supply segments of the second supply device (22) arranged downstream are off-set relative to the supply segments of the first supply device (76, 84), preferably by half the width of the supply segments.
  15. Fleece formation unit according to claim 13 or 14 characterised in that it has between the first supply device (76, 84) and the second sup0ply device (22) a measuring device (14) for measuring the surface weight of the fleece (78) across its width running crosswise to the transport direction of the transport device (4, 10), in one measuring region of the transport device (4, 10) in order to determine a cross profile and longitudinal profile of the fleece (78), and that it moreover has a control or regulating device (20), which is set up to control the second supply device (22) on the basis of the results of the measuring device (14) so that the second supply device (22) supplies opened fibres or flocked fibres to identified thin spots of the fleece (78) in order to even out the fleece (78), or that the second supply device (22) supplies opened fibres or flocked fibres purposefully to form a desired non-uniform cross profile and/or longitudinal profile of the fleece (78) with thin spots and thick spots.
EP12199625.0A 2012-08-06 2012-12-28 Supply device for delivering opened fibres or flocked fibres to a transport device Active EP2695976B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12179382.2A EP2695982A1 (en) 2012-08-06 2012-08-06 Device and method for equalizing or providing a profile to a mat of flocked fibers
EP12199625.0A EP2695976B1 (en) 2012-08-06 2012-12-28 Supply device for delivering opened fibres or flocked fibres to a transport device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP12199625.0A EP2695976B1 (en) 2012-08-06 2012-12-28 Supply device for delivering opened fibres or flocked fibres to a transport device
EP20130170105 EP2695980A1 (en) 2012-08-06 2013-05-31 Feeding device for fibers or flocks
CN201310337870.3A CN103572511B (en) 2012-08-06 2013-08-05 Device for forming woven pile fabrics or fiber bundle cushions
CN201310337279.8A CN103572506A (en) 2012-08-06 2013-08-05 Feed device for fibers or flocks
US13/959,953 US9187852B2 (en) 2012-08-06 2013-08-06 Feed device for supplying individualized fibers or fiber flocks to a transport device
US13/959,985 US20140033479A1 (en) 2012-08-06 2013-08-06 Feed Device for Fibers or Fiber Flocks

Publications (2)

Publication Number Publication Date
EP2695976A1 EP2695976A1 (en) 2014-02-12
EP2695976B1 true EP2695976B1 (en) 2015-02-25

Family

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Application Number Title Priority Date Filing Date
EP12179382.2A Withdrawn EP2695982A1 (en) 2012-08-06 2012-08-06 Device and method for equalizing or providing a profile to a mat of flocked fibers
EP12199616.9A Active EP2695983B1 (en) 2012-08-06 2012-12-28 Device and method for forming an even or profiled fleece or an even or profiled flocked fibre mat
EP12199629.2A Active EP2695984B1 (en) 2012-08-06 2012-12-28 Device for forming a fleece or a flocked fibre mat
EP12199625.0A Active EP2695976B1 (en) 2012-08-06 2012-12-28 Supply device for delivering opened fibres or flocked fibres to a transport device

Family Applications Before (3)

Application Number Title Priority Date Filing Date
EP12179382.2A Withdrawn EP2695982A1 (en) 2012-08-06 2012-08-06 Device and method for equalizing or providing a profile to a mat of flocked fibers
EP12199616.9A Active EP2695983B1 (en) 2012-08-06 2012-12-28 Device and method for forming an even or profiled fleece or an even or profiled flocked fibre mat
EP12199629.2A Active EP2695984B1 (en) 2012-08-06 2012-12-28 Device for forming a fleece or a flocked fibre mat

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US (3) US9003609B2 (en)
EP (4) EP2695982A1 (en)
CN (3) CN103572511B (en)
ES (3) ES2533211T3 (en)

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US20140033479A1 (en) 2014-02-06
CN103572510A (en) 2014-02-12
EP2695983B1 (en) 2015-12-23
US9003609B2 (en) 2015-04-14
EP2695983A1 (en) 2014-02-12
EP2695976A1 (en) 2014-02-12
EP2695982A1 (en) 2014-02-12
US9187852B2 (en) 2015-11-17
EP2695984B1 (en) 2015-03-04
US20140033480A1 (en) 2014-02-06
EP2695984A1 (en) 2014-02-12
ES2533211T3 (en) 2015-04-08
ES2534209T3 (en) 2015-04-20
CN103572511B (en) 2017-04-12
US20140034399A1 (en) 2014-02-06
CN103572510B (en) 2016-05-11
CN103572511A (en) 2014-02-12
ES2560009T3 (en) 2016-02-17
CN103572506A (en) 2014-02-12

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