EP1163383B1 - Vliesleger - Google Patents

Vliesleger Download PDF

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Publication number
EP1163383B1
EP1163383B1 EP00911012A EP00911012A EP1163383B1 EP 1163383 B1 EP1163383 B1 EP 1163383B1 EP 00911012 A EP00911012 A EP 00911012A EP 00911012 A EP00911012 A EP 00911012A EP 1163383 B1 EP1163383 B1 EP 1163383B1
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EP
European Patent Office
Prior art keywords
crosslapper
web
zone
conveyor belt
external
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Expired - Lifetime
Application number
EP00911012A
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English (en)
French (fr)
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EP1163383A1 (de
Inventor
Bernard Jourde
Christophe Clement
Bernard Chatelet
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Asselin SA
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Asselin SA
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Publication of EP1163383B1 publication Critical patent/EP1163383B1/de
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • the present invention relates to a spreader-lapper for transform by folding a veil into a tablecloth.
  • the lapping carriage has a lapping slot facing down, through which the veil is unwound while the lapper carriage moves back and forth above a receiving apron.
  • the veil is therefore deposited in accordion on the receiving apron.
  • the receiving apron moves in direction substantially perpendicular to the direction of movement of the front belts and back. So instead of being exactly superimposed, the successive segments of sail between two folds are offset in zigzag along the receiving apron.
  • the tablecloth continues like this formed is intended for a consolidation treatment and / or compaction, consisting for example of needling.
  • the veil transport path in the spreader passes also by a mobile accumulator cart back and forth to regulate the length of the transport path between the area entry of the veil into the spreader and the topping slot, and thus regulate the speed at which the veil is delivered at through the topping slot
  • the veil consisting mainly of fibers longitudinal, very little linked together and forming together a strongly ventilated structure, has a mechanical resistance very small. However, it is important that when passing through the spreader-lapper, the veil keeps as faithfully as possible its initial dimensioning, namely in particular its initial width and the uniform distribution of its weight over the width. However, the manipulations undergone by the veil in the spreader tend to compromise this desired stability.
  • EP-A-0 517 563 a allowed a dramatic increase in the speeds of industrial treatment of the veil by teaching to combine a substantially straight nip from a carriage to the other, an open transport upstream of the carriage accumulator, and a two-part turn in the trolley accumulator comprising a first turn passing the veil from a horizontal path to an oblique slope path, then a second turn at an angle greater than 90 ° and less 180 ° with a first pinch line between the veil the two belts in an intermediate angular position of this second turn.
  • This structure has enabled it to almost double the industrial speed of movement of the veil in the spreader, which went from about 80 m / min to about 150 m / min.
  • a phenomenon which has been observed according to the invention when we try to exceed this speed with a structure according to EP-A-0 517 563 is that the pinch line located in intermediate position on the second partial turn of the carriage accumulator tends to expel air from the veil in particular towards upstream. This results in swelling and deformation of the veil upstream of the nip, then an expansion radial of the veil when the veil passes through the line of pinch.
  • WO-A-97/19 209 teaches to create a first zone of pinch in slightly convergent shape along the part downward oblique between the two partial turns in the accumulator cart and then multiply the lines of pinching along the entire second partial turn, with a first pinch line just upstream and a last pinch line just downstream of the turn.
  • the object of the invention is thus to propose a spreader-lapper comprising for guiding the web in at least one turn a structure to increase the speed of circulation of the web in the spreader without leading to a unacceptable deformation of the veil.
  • the version where the support includes a flat section of the outer carpet turned out particularly advantageous.
  • a support zone is behaves like an active deflector, which engages the veil in the second part of the turn around the inner roller, and that of continuously over a fairly large second angular range.
  • the section plan comes earlier to channel and propel the veil into its turn, while going to support it further downstream towards the longitudinal section of the nip.
  • the outer face i.e. textually active
  • the flat section is turned obliquely towards the top.
  • the veil be free of any support before the second angular range and in particular along the sloping section descending between the two partial turns.
  • the veil travels a third free angular range of external support until the veil comes to rest on the section longitudinal of the outer carpet extending in the area of pinch.
  • the longitudinal section of the outer mat is preferably supported by a roller placed a little behind the inner roller relative to the direction of movement of the web, so as not to close a rigid pinch line at the exit from the turn, contrary to what the WO recommends 97/19209.
  • the pinch area extends so straight down slightly downward of the accumulator carriage to the lapper carriage.
  • This slope has the advantage of slightly reduce the turn in the cart accumulator and correspondingly reduce the turn to be made in the lapper carriage. Since the horizontal distance between the lapper carriage and the accumulator carriage varies in operation, the slope of the nip is not constant. It can typically be of the order of a few degrees.
  • the face outside of the outside carpet is turned obliquely towards the low in the area of the collar formed with the outside face of the mat inside. So, from the neck forming the lapping slit, the veil can be placed on one side or the other depending on the direction movement of the lapper carriage.
  • the first angular range is preceded by a zone preparatory where the veil rests uncovered on the carpet interior located below, and, immediately upstream, by a area where the veil is covered by the outer carpet, located above, especially in the pinch area, which carpet outside deviates from the veil obliquely upward in the preparatory area. It has indeed been observed that at the end of the pinch area, the veil tended to stick to the carpet of the above and therefore to form a sort of wave above the carpet located below.
  • the top mat deviates relatively quickly from the veil which tends to reduce the grip effect and in addition the preparatory zone gives the veil time to land on the carpet below before the first angular range of the turn. This effect is further enhanced by the slight slope of the pinch zone which was proposed above.
  • the structure of bend is applied to at least two bends in the spreader-lapper and in particular a first turn in a carriage accumulator located at the entrance of a pinch zone then at a second turn located at the exit of the toe-in area fully straight in the lapper carriage.
  • the invention is also advantageous if only one turn is structured in accordance with the invention.
  • the spreader-topper shown in perspective in the figure 1 includes a first carpet 2, called "front carpet", which collects the veil of fibers 4, for example from a card not shown, and transports it to enclosure 1 where it is transformed by folding into a web 62 transported by a apron 8 outside the enclosure 1, typically up to a needling machine or other compaction machine and / or consolidation, not shown.
  • the directions of transport of the veil 4 and of the ply 62 are respectively indicated in FIG. 1 by arrows F and K.
  • arrows F and K For reference purposes, we will refer to "front side" of the spreader-side 7 side adjacent to the face through which the web 4 and "rear side” of the spreader-lapper penetrates side 9 opposite to front side 7.
  • the interior of the spreader-lapper is shown schematically in the elevation views of FIGS. 2 to 4, taken along a plane Q ( Figure 1) perpendicular to the direction of transport of the web 62 by the deck 8.
  • the spreader-lapper Associated with the front mat 2, the spreader-lapper includes a second carpet 5, called "rear carpet".
  • Carpets 2 and 5 shown in solid lines in Figures 2 to 4, have the same width and have their side edges in the same planes parallel to the plane of Figures 2 to 4.
  • the front mat 2 follows a closed route made up of sections 2a to 2m delimited by cylindrical guide rollers 3a to 3m.
  • the rear carpet 5 follows a closed route made up of sections 5a to 5d delimited by cylindrical guide rollers 6a to 6j.
  • Guide rollers 3a to 3m, 6a to 6j are mounted pivoting around respective axes perpendicular to the plane of Figures 2 to 4, i.e. substantially parallel to the direction of movement of the deck 8.
  • the axes of the rollers 3a, 3b, 3i, 3j, 3l, 3m and 6f, 6g, 6i and 6j are fixed with respect to the fixed enclosure 1 of the spreader-lapper.
  • each belt 2, 5 at least one of the axis rollers fixed (for example the rollers numbered 3i and 6j), is rotated by a respective servo motor 11, 61 ( Figure 4) so as to circulate the belts 2, 5 along of their respective closed paths 2a to 2m, 5a to 5d according to predetermined kinematic laws which will be discussed later.
  • the directions of movement of the belts 2, 5 are indicated respectively by the arrows F2, F5 in FIGS. 2 to 4.
  • roller axes of the rollers 3c, 3d and 6a, 6b, 6c, 6d are carried by a first main carriage mobile 10, called “accumulator cart”.
  • Roller axes 3rd, 3f, 3g, 3h and 6th are carried by a second movable main carriage 14, called “lapper carriage”.
  • the main carriages 10, 14 are located above the deck 8 and are movable in alternating translation along a horizontal direction and perpendicular to the axes of the rollers 3a to 3m, 6a to 6d.
  • each mat 2, 5 forms a 180 ° turn around a respective guide roller 3k, 6h carried by a respective auxiliary carriage 16, 18.
  • the two carriages auxiliaries 16, 18 have movements which compensate for those of main carriages 10, 14 to maintain substantially constant the length of each of the closed paths 2a to 2m, 5a at 5d
  • the closed paths 2a to 2m, 5a to 5d are external one to the other.
  • the carpet sections numbered 2d and 5d in Figures 2 to 6 are located in parallel one close to the other so as to maintain the veil 4 between them.
  • the veil 4 is shown in dotted lines in FIG. 4 but is not shown in Figures 2 and 3, for the purpose of simplicity.
  • the neighboring sections 2d, 5d of the closed paths followed by the two belts 2, 5 in the pinch area 20 are delimited, at the entrance to the nip, by rollers guide 3d, 6d, carried by the accumulator carriage 10, and, at the exit from the nip 20, by rollers 3rd, 6th guidance, carried by the lapper carriage 14.
  • the area of pinching thus extends in a straight line of the accumulator carriage 10 to the lapper carriage 14.
  • the area of pinch 20 is in a slight downward slope, a few degrees, relative to the direction of circulation of the fibers of the accumulator cart to the lapper cart.
  • the carriage accumulator 10 For guiding the front belt 2, the carriage accumulator 10 (see also the more detailed view of the figure 5) carries two guide rollers 3c, 3d located inside closed path 2a to 2m. Upstream of the accumulator carriage 10, the front belt 2 carries the veil 4 uncovered according to the substantially horizontal section 2b from the front side 7. On reaching the accumulator trolley 10, the front belt 2 describes a first turn around the deflection roller 3c at an angle A of between 0 and 90 degrees to constitute the inclined section 2c sloping downwards, then a second turn around the 3d roller at an angle B included between 90 and 180 degrees to form the longitudinal section 2d of the pinch area 20, directed towards the front side 7 of the web-laying machine.
  • the total angular deviation A + B of the mat front 2 around the guide rollers 3c, 3d carried by the accumulator cart 10 is 180 degrees minus the slope of the pinch area 20.
  • the accumulator carriage 10 further carries four guide rollers 6a, 6b, 6c, 6d supporting the rear belt 5, the rollers 6a, 6b and 6d being internal to its path closed 5a to 5d and the roller 6c, of larger radius, says detour roller, being outside this closed path 5a to 5j.
  • the rear belt 5, which does not carry the veil 4 follows the substantially horizontal section 5d from the rear side 9.
  • the rear belt 5 When arriving on the trolley accumulator 10, the rear belt 5 describes a first turn around the deflection roller 6a at an angle D between O and 90 degrees, facing down to enter the section 5a, a second turn between 90 and 180 degrees around the roller 6b to enter section 5b, then a third bend around the detour roller 6c at a negative angle (because the detour roller 6c is outside the closed path 5a to 5j) greater than 180 degrees, and finally a fourth turn around roller 6d to enter the longitudinal section 5d of the nipping zone 20, directed towards the front side 7 of the spreader-lapper.
  • Total angular deviation of the rear carpet 5 around the guide rollers 6a, 6b, 6c, 6d carried by the accumulator trolley 10 is equal to the slope of the area of pinch 20.
  • rollers motors the rollers 3i, 6j because their speed of rotation directly defines the speed of the 2d and 5d sections of the belts in the pinch area 20. It is made so that the speed of sections 2d and 5d is equal so that the web 4 maintained between sections 2d and 5d is itself driven en bloc at this speed, without undergoing either friction or shear between its lower face and its upper face. Therefore, with the choice of rollers 3i and 6j as motor rollers, both motors are controlled so that rotate at both times at the same speed if the rollers 3i and 6j have the same diameter.
  • the lapping carriage 14 is actuated back and forth in the horizontal direction and perpendicular to the axis of the rollers above the deck 8 so as to deposit the veil 4 on the deck 8 to form the sheet 62 as it was says with reference to Figure 1. If we want the veil to be deposited without compression or extension, the speed of the veil flowing down into the slit slot 38 ( Figure 6) formed between the rear carpet 5 around the 6th roller and the section 2g of the belt 2, is equal to the speed of translation of the lapper carriage 14. When the lapper carriage 14 moves towards the front part 7 of the spreader (situation shown in Figure 4), this implies that the speed of movement of the belts in the nip area 20, i.e. substantially double that of the lapper carriage 14.
  • the absence of compression or extension of the veil is achieved when the speed of movement of sections 2d and 5d is substantially nothing.
  • the speed of sections 2d and 5d is therefore very variable during operation.
  • the accumulator cart 10 is operated back and forth so as to transform the speed very variable of section 2d in a generally constant speed for sections 2b and 2a, corresponding to speed, in general constant, to which the veil 4 is delivered by the card.
  • the front mat 2 forms above the mat 8, between the fixed rollers 3b and 3i, a loop whose length is variable because it depends on the position of the accumulator carriage 10 along its back-and-forth travel.
  • the front mat 2 is inextensible and this variation in length is compensated by a contrary variation of another loop formed below the apron 8 between two fixed rollers 3j and 3l by displacement in back and forth of the auxiliary carriage 16, carrying the roller 3k around which the belt 2 makes a 180 ° turn.
  • the rear belt 5 form between the fixed rollers 6j and 6f, above apron 8, a loop whose length varies in function of the position of the lapper carriage 14 along its Back and forth race.
  • the rear carpet 5 is substantially inextensible and the variation in length of this loop is compensated by the opposite variation of a loop formed by the sections 5g, 5h between the rollers 6g and 6i, under the apron 8, by reciprocating movement of the auxiliary carriage 18, carrying the roller 6h around which the rear carpet performs a 180 degree turn.
  • the spreader comprises driving pinions 85, 89 driven by respective servomotors 63, 64 ( Figure 4) and meshing respectively with toothed belts 84, 88 symbolically represented in dashes.
  • Belt 84 is attached by one end to the accumulator carriage 10 and by the other end of the auxiliary carriage 16.
  • the toothed belt 84 bypasses the motor pinion 85 and a return pinion 86 all two mounted in a fixed position in the rear part 9 of the spreader.
  • Sprockets 85 and 86 are arranged so that the end sections of the toothed belt 84 are parallel to the direction of translation of the carriages 10 and 16.
  • a toothed belt 88 has one end fixed to the lapper carriage 14 and its other end fixed to the carriage auxiliary.
  • the toothed belt 88 bypasses the drive pinion 89 and a return gear 90 both fixedly mounted in the front part 7.
  • the pinions 89 and 90 are arranged so that the end sections of the toothed belt 88 are parallel to the direction of translation of the carriages 14 and 18.
  • the accumulator carriage 10 is coupled to the auxiliary carriage 16 by cable 92, shown in lines mixed, which bypasses two deflected pulleys 93 and 94 in a fixed position in the front part 7.
  • the lapping carriage 14 and the auxiliary carriage 18 are coupled by a cable 96 bypassing two idler pulleys 97 and 98 mounted in position fixed in the rear part 9.
  • the end sections of these two cables are parallel to the direction of translation of the four trolleys 10, 14, 16, 18.
  • auxiliary carriage 16 In the other direction of movement, it is the auxiliary carriage 16 which is pulled by the toothed belt 84 and which in turn pulls the carriage accumulator 10 via the cable 92.
  • the toothed belt 88 pulls the auxiliary carriage 18 via cable 96.
  • the toothed belt 88 pulls the auxiliary carriage 18 which in turn pulls the lapping carriage 14 via cable 96.
  • the auxiliary carriages 16 and 18 are installed in a tunnel 70 formed under a partition 72 extending below the deck 8.
  • the partition 72 houses the veil 4 and the sheet formed 62 with respect to air turbulence caused by the movement of the auxiliary carriages 16 and 18.
  • each cable 92 or 96 and each toothed belt 84 or 88 is preferably carried out in practice in the form of two cables or respectively belts mounted in parallel laterally from on either side of belts 2 and 5.
  • the slope of the pinch area 2d, 5d is sufficient small so that the variation in length of sections 2d and 5d either substantially equal to the variation in horizontal distance between the carriages 10 and 14 during operation. So, the direct coupling which has been described for the carriages 16 and 18 with the accumulator 10 and lapper 14 trolleys respectively does not produce significant stress in carpets 2 and 5. In particular, if one wishes to avoid any residual stress in carpets and / or increase the slope of the pinch area 2d, 5d, we can remove the mechanical coupling between each accumulator trolleys 10 and lapper 14 and its trolley respective auxiliary 16 or 18, and drive each carriage to using a servo motor specific to this carriage.
  • auxiliary carriages 16 and 18 a speed having a slightly different from that of the main carriage 10 or 14 partner. It is still possible to vertically shift the rollers 6i and 3l so that the sections 5h and 2k have a slight slope, so that the compensation loops length 5g, 5h; 2j, 2k have a geometry whose variations in length more exactly compensate for variations in length of mats above deck 8.
  • the web 4 arriving from the card is deposited on the ascending section 2a constituting an entry zone into the spreader.
  • the web 4 is transported uncovered on the upwardly sloping section 2a then on the horizontal section 2b and on the downwardly sloping section 2c as well as in a first angular range B 1 of the rotation according to the angle B around the roller 3d which is inside this bend.
  • the front carpet 2 thus constitutes the interior carpet for said turn, relative to the web 4.
  • Section 2c by its downward slope, constitutes a preparatory section for the turn around the 3d interior roller, corner during which the weight support of the veil will be transferred from the interior carpet (front carpet 2) to the exterior carpet (rear carpet 5).
  • the veil On section 2c, the veil may drop to flat on carpet 2 even if it has lifted slightly when bend around roller 3c at angle A.
  • the angular range B 1 ends at the point where the veil moves vertically. In reality, this limit is blurred and depends in particular on the thickness of the veil as well as on its weight and on the operating speed of the machine.
  • a second angular range B 2 of the turn around the inner roller 3d the web is supported on the radially outer side by the flat section 5a of the rear carpet 5, therefore by a region with infinite radius of curvature, of the carpet 5.
  • the front belt 2 forms with the rear carpet 5 a convergent 21 covering the angular range B 2c , followed by a divergent 22 covering an angular range B 2d , the angular ranges B 2c and B 2d together forming the angular range B 2 .
  • the convergent 21 and the divergent 22 are connected to each other by a neck 23 where the interval provided for the web is small but not zero even when the machine is at rest, in the absence of web, as shown in FIG. 5.
  • the convergent 21 and the neck 23 as well as the start of the divergent 22 are adjacent to the flat section 5a of the rear conveyor 5.
  • the end of the divergent 22 corresponds to the start of the rotation of the rear conveyor 5 around the roller 6b.
  • the section 5a is oriented so that its outer face, in contact with the web, supports the web from below in the angular range B 2 , where the combined effect of the centrifugal force and the weight of the web tend to take off that -this of the front belt 2.
  • the section 5a is inclined about 30 degrees relative to the vertical.
  • the neck 23 is located about 30 degrees below the horizontal diameter of the 3d roller.
  • the section 5a is substantially perpendicular to the sloping section 2c of the front belt 2.
  • the section 5a of the rear belt 5 extends towards the high above the converging 21 so as to shelter in in particular the first angular range B1 with regard to aerodynamic turbulence created by the movement of the carriage accumulator 10.
  • the neck 23 has a non-zero thickness which can even increase a little in operation since the neck 23 is formed in an area where the section 5a is not directly supported by its rear face, the forced air from the veil in the converge and the passage of the neck 23 is limited to the quantity strictly necessary and with great progressiveness, therefore by limiting the tendency for lateral scattering of the fibers.
  • the roller 6b which guides the rear belt 5 at the outlet of the divergent 22 has a relatively small radius and in particular much smaller than that of the inner roller 3d. In this way, the rear belt 5 suddenly departs from the web transport path. This promotes maintenance of the adhesion of the web against the front carpet 2 and a break in the adhesion of the web with the rear carpet 5. This break occurs in an angular position, around the axis 28 of the 3d roller, which is approximately 45 degrees below the horizontal diametrical plane of the 3d roller. From there, the veil passes through a third angular range B 3 of the turn, where it is again freed from an external support to prepare to come to rest on the section 5d, of the rear carpet 5, forming the pinch zone. 20.
  • the geometry of the converging arrangement 21-col 23-divergent 22 is adjustable by moving the position of the roller 6b by means of an adjusting device 24 and according to a direction 26 which passes away from the line segment going from the axis 27 of the roller 6a to the axis 28 of the inner roller 3d.
  • the direction 26 does not form an intersection with said segment.
  • direction 26 is not radial relative to the 3d roller, it is on the contrary near tangential to the 3d roller. So a setting end is possible, because a variation in the size of the neck 23 is obtained by a much larger displacement of the roller 6b.
  • the veil is located opposite an opening 29 formed between the sections 5b and 5c of the rear carpet 5. This opening 29 allows the exhaust of any air discharged from the veil at the entrance of pinch area 20
  • the roller 6d supporting the rear belt 5 at the entrance to the nip is offset rearward (to the left of FIG. 5), relative to the direction of movement of the veil, with respect to point 31 where the front belt 2 leaves contact with the inner roller 3d to form the section 2d of the pinch area 20.
  • the turn B thus comprises a fourth angular area B 4 in which the web comes to rest on the longitudinal section 5d of the rear carpet 5 to enter gradually in the nip 20 by undergoing an extremely progressive compression between the flat section 5d of the rear belt 5 and the large radius of curvature of the front belt 2 around the inner roller 3d.
  • rollers 3d and 6d have an offset 32 between them, there is again no rigid pinch line formed at the entrance to the pinch zone 20, because the section 5d is not directly supported at opposite point 31 where the section 2d begins and consequently the nip 20.
  • the arrow 33 illustrates that the roller 6d supporting the section 5d upstream of the nip 20 is adjustable in height.
  • a height adjustment illustrated by the arrow 34 in Figure 6 is provided for the 3rd roller supporting the section 2d at the exit from the pinch zone 20.
  • the roller 3e supporting the section 2d at the exit from the nip 20 is offset backward from a distance 36 relative to the direction of veil circulation, relative to the 6th supporting roller the corresponding end of the section 5d. So like at the entry of the pinch zone avoids forming a rigid constriction for the web, the section 5d not being directly supported at point 37 where carpet 2 begins to bypass the 3rd roller and therefore where the nip 20.
  • the belt 2 forms the section 2e oriented obliquely upwards. This tends to take off mentally the veil of the carpet before 2 before the veil begins to be drawn into the turn around the 6th roller.
  • section 5d thus constitutes a zone preparatory 39 for the veil, which is slightly sloping descending in accordance with the slope of the nip.
  • the inner carpet is the rear carpet 5 and the roller inside is the 6th roller supporting the rear belt 5.
  • the diameter of the 3h roller is much less than that of the 6th roller, for example about half the size as shown in Figure 6.
  • the distance to be covered by the veil between the neck of the arrangement convergent-col-divergent and the exit apron (not shown) in this figure) is roughly the same along the periphery of the inner roller 6th when the lapper carriage 14 moves to the front side of the machine (to the right in Figure 6) along the 2g section and the periphery roller 3h when the lapper carriage 14 moves towards the back of the machine (to the left of Figure 6).
  • the inner roller 6th is adjustable in direction horizontal by means of an adjustment device 39.
  • the rolls 3g, 3h supporting the external support section 2g are supported by a common mount 41 whose position is adjustable in a horizontal direction by means of a adjuster 42.
  • the planar section 5a externally supporting the web in its turn in the example of FIG. 5 is replaced by a succession of two rollers 6 b1 , 6 b3 located substantially equidistant from the axis 28 of the inner roller 3d.
  • the rollers 6 b1 , 6 b3 simulate a concave support structure extending along a line 43 which can be considered as an arc of a circle centered on the axis 28 of the inner roller 3d.
  • the carpet 5 bypasses the two rollers 6 b1 and 6 b3 on the side adjacent to the web.
  • Line 43 corresponds substantially to the desired path for the outer face of the web 4.
  • the roller 6b3 is positioned substantially like the roller 6b in the example of FIG. 5
  • the roll 6 b1 is located upstream of the roll 6 b3 relative to the direction of circulation of the web, and has the same diameter as the roll 6 b3 .
  • the rear belt 5 Upstream of the roller 6 b1 , relative to the direction of circulation of the rear belt 5, the rear belt 5 forms a flat section 5 a1 which, in service is practically not in contact with the web and therefore has essentially the function of sheltering aerodynamic turbulence, the web resting on the preparatory section 2c and on the front belt 2 in the first angular range B 1 .
  • the lapping carriage 14 comprises, in place of the external support assembly formed by the two rollers 3g, 3h and the section of carpet before 2g, a single roller 3g1 of diameter larger than the inner roller 6th.
  • the rollers 6e and 3g 1 have their lower generatrix 46, 47 in the same horizontal plane 48 in which also extend the sections 5e of the rear belt 5 and 2h of the front belt 2, a short distance above the output apron 8 not shown in Figure 8.
  • the neck formed between the belts 2 and 5 in the zone of maximum approximation between the rollers 6e and 3g 1 is, as in the example of Figure 6, located above the plane horizontal diametral of the roller 6th.
  • FIGS. 5 and 6 are preferred to those of FIGS. 7 and 8 respectively because in the former the veil is never compressed in rigid necks and always maintained in convergent-neck-divergent configurations exhibiting great progressivity. which improves the effect of support and co-training of the veil by its external face to the turn, while reducing the harmful effects of the compression / decompression cycles.
  • the embodiment of Figure 8 does not realize, unlike that of Figure 6, the desirable condition of equal distance to be traveled by the veil between the neck and the contact with the exit apron for the two directions of movement of the carriage 14. This path is longer along the roller 3g 1 than along the roller 6th whose diameter is smaller.
  • section 5 a1 could be made more vertical so that it constitutes a sort of convergent up to the double neck formed by the rear belt 5 on each of the rollers 6 b1 and 6 b3 ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Materials For Medical Uses (AREA)

Claims (27)

  1. Vliesleger, umfassend
    mindestens zwei endlose Förderbänder (2, 5), die für einen Faserflor (4) zusammen einen Förderweg bilden, der sich zwischen einer Eintrittszone (2a) und einem Ablegespalt (38) erstreckt,
    mindestens einen Ablegewagen (14), der Walzen (3e, 3f, 3g, 3h, 6e; 3g1) zur Führung der beiden Förderbänder trägt und auf dem der Ablegespalt (38) gebildet ist,
    einen Austrittsförderer (8), der unter dem Ablegespalt (38) und in einer zu den Achsen (28) der Führungswalzen im wesentlichen parallelen Richtung (K) beweglich ist,
    wobei der Weg mindestens eine Krümmung (B; C) an der Außenseite eines (2; 5) der Förderbänder in einer Zone bildet, in der die Innenseite dieses Förderbands auf einer inneren Führungswalze (3d; 6e) aufliegt, wobei der Flor in einem ersten Winkelbereich (B1; C1) der Krümmung unbedeckt ist und dann durch eine Stützzone (5a; 2g) radial nach außen abgestützt ist, die von dem anderen Förderband in einem zweiten Winkelbereich der Krümmung (B2; C2) gebildet wird, dadurch gekennzeichnet, daß das andere Förderband in der Stützzone gemäß einem Profil geführt wird, das zu einem Profilbereich gehört, der zwischen einem auf die Außenseite des Flors zu gewölbten Profil, das einen größeren Krümmungsradius als die innere Führungswalze (3d; 6e) hat, und einem sich an den Außenumfang des Flors anschmiegenden Profil (43) liegt.
  2. Vliesleger nach Anspruch 1, dadurch gekennzeichnet, daß die Stützzone (5a, 2g) im wesentlichen eben ist.
  3. Vliesleger nach Anspruch 2, dadurch gekennzeichnet, daß die Stützzone von einem Abschnitt (5a, 2g) des äußeren Förderbands gebildet ist, der zwischen zwei äußeren Walzen (6a, 6b; 3g, 3h) gespannt ist, die um die innere Walze herum winkelmäßig positioniert sind, und zwar die eine stromauf und die andere stromab eines zwischen den beiden Förderbändern im zweiten Winkelbereich (B2; C2) gebildeten Halses (23).
  4. Vliesleger nach Anspruch 3, dadurch gekennzeichnet, daß mindestens eine der beiden äußeren Walzen (6b; 3g, 3h) so verstellbar ist, so daß der Abstand zwischen den beiden Förderbändern im zweiten Winkelbereich (B2, C2) verstellt wird.
  5. Vliesleger nach Anspruch 4, dadurch gekennzeichnet, daß die mindestens eine äußere Walze (6b) in einer Richtung (26) verstellbar ist, die in einem Abstand von der Strecke verläuft, die sich von der Achse (28) der inneren Walze (3d) zur Achse (27) der anderen äußeren Walze (6a) erstreckt.
  6. Vliesleger nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Förderbänder im zweiten Winkelbereich (B2; C2) der Krümmung miteinander, in Richtung des Faserntransports, eine Verengung (21) und eine darauffolgende Ausweitung (22) bilden.
  7. Vliesleger nach Anspruch 6, dadurch gekennzeichnet, daß die Verengung (21) und die Ausweitung (22) durch einen Hals (23) miteinander verbunden sind, an dem die beiden Förderbänder (2, 5) auch in Ruhestellung bei Fehlen des Flors voneinander entfernt sind.
  8. Vliesleger nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß das äußere Förderband längs der Anordnung Verengung-Hals-Ausweitung um eine äußere Führungswalze (3g1) herum geführt ist, die einen größeren Durchmesser als die innere Führungswalze (6e) hat, und daß die untersten Erzeugenden (46, 47) der äußeren und der inneren Führungwalze im wesentlichen in derselben horizontalen Ebene (48) liegen.
  9. Vliesleger nach Anspruch 1, dadurch gekennzeichnet, daß die Stützzone in einer konkaven Form (43) mit Hilfe einer Annäherung gebildet wird, die sich aus einer Folge von zwei konvexen Zonen (6b1, 6b3) ergibt, die einen kleineren Radius als die innere Führungswalze (3d) haben und längs des Umfangs der inneren Führungswalze mit einem gewissen radialen Zwischenraum zwischen jeder konvexen Zone und der Außenseite des inneren Förderbands (2) aufeinanderfolgen.
  10. Vliesleger nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß dem ersten Winkelbereich (B1; C1) ein Abschnitt (2c, 39) mit schräger Neigung vorhergeht, in dem der Flor im Betrieb unbedeckt auf der nach oben gerichteten Außenseite des inneren Förderbands aufliegt.
  11. Vliesleger nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Krümmung in dem Ablegewagen (14) gebildet wird und den Flor von einer Längsausrichtung stromauf des Ablegewagens (14) in eine Ausrichtung nach unten in dem Ablegespalt (38) ablenkt.
  12. Vliesleger nach Anspruch 11, dadurch gekennzeichnet, daß die Außenseite des äußeren Förderbands (2g) in der Zone des Halses schräg nach unten gerichtet ist.
  13. Vliesleger nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß dem ersten Winkelbereich (C1) eine Vorbereitungszone (39), in der der Flor unbedeckt auf dem inneren Förderband aufliegt, und unmittelbar stromauf eine Zone (20) vorhergeht, in der der Flor (4) von dem äußeren Förderband bedeckt ist, das sich in der Vorbereitungszone von dem Flor schräg nach oben entfernt.
  14. Vliesleger nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß die Zone, in der der Flor von dem äußeren Förderband bedeckt ist, eine Klemmzone (20) ist, die sich von einem Sammelwagen (10) aus im wesentlichen geradlinig erstreckt.
  15. Vliesleger nach Anspruch 14, dadurch gekennzeichnet, daß der Flor von der Eintrittszone (2a) zum Sammelwagen (10) unbedeckt befördert wird.
  16. Vliesleger nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß
    die Krümmung eine Winkel (B) zwischen 90 und 180° bis zu einer Längszone (20) des Förderwegs bildet, und
    die Außenseite des äußeren Förderbands in der Zone des Halses (23) schräg nach oben gerichtet ist, so daß der Flor in der Zone des Halses von unten gestützt wird.
  17. Vliesleger nach einem der Ansprüche 1 bis 9 oder 16, dadurch gekennzeichnet, daß dem ersten Winkelbereich (B1) ein Abschnitt (2c) in schräger Neigung vorausgeht, in dem der Flor im Betrieb unbedeckt auf der nach oben gerichteten Außenseite des inneren Förderbands aufliegt, und daß der schräge Abschnitt zu einem Abschnitt (5a) des äußeren Förderbands in der Zone des Halses (23) im wesentlichen senkrecht ist.
  18. Vliesleger nach einem der Ansprüche 1 bis 9, 16 oder 17, dadurch gekennzeichnet, daß die Krümmung auf einem am Eintritt einer Klemmzone (20) zum Einklemmen des Flors zwischen den beiden Förderbändern (2, 5) angeordneten Sammelwagen (10) gebildet ist, wobei die Klemmzone sich im wesentlichen bis zum Ablegewagen (14) erstreckt.
  19. Vliesleger nach Anspruch 18, dadurch gekennzeichnet, daß das äußere Förderband auf dem ganzen Weg des Flors im Vliesleger stromauf des zweiten Winkelbereichs (B2) der Krümmung im Sammelwagen (10) nicht mit dem Flor in Kontakt ist.
  20. Vliesleger nach einem der Ansprüche 1 bis 7, 9 oder 16 bis 19, dadurch gekennzeichnet, daß der Durchmesser der inneren Walze (3d) mindestens etwa 20 cm beträgt.
  21. Vliesleger nach einem der Ansprüche 1 bis 9 oder 16 bis 20, dadurch gekennzeichnet, daß der Flor auf der radial äußeren Seite in einem dritten Winkelbereich (B3) der Krümmung oberhalb eines Längsabschnitts (5d) des äußeren Förderbands freigegeben ist, der unter der inneren Walze (3d) unter Bildung eines gewissen Zwischenraums mit der Außenseite des inneren Förderbands verläuft.
  22. Vliesleger nach Anspruch 21, dadurch gekennzeichnet, daß der Längsabschnitt (5d) des äußeren Förderbands von einer höhenverstellbaren Walze (6d) unterstützt ist, die bezüglich der inneren Walze (3d) in Bewegungsrichtung des Flors nach hinten versetzt ist.
  23. Vliesleger nach Anspruch 21 oder 22, dadurch gekennzeichnet, daß das äußere Förderband gegenüber dem dritten Winkelbereich (B3) eine Öffnung (29) bildet.
  24. Vliesleger nach einem der Ansprüche 21 bis 23, dadurch gekennzeichnet, daß der Längsabschnitt (5d) des äußeren Förderbands mit einem Längsabschnitt (2d) des inneren Förderbands stromab der inneren Walze (3d) einen bezüglich der Horizontalen leicht abfallenden Abschnitt der Klemmzone (20) bildet.
  25. Vliesleger nach Anspruch 24, dadurch gekennzeichnet, daß der leicht abfallende Abschnitt sich geradlinig bis zu dem Ablegewagen (14) erstreckt.
  26. Vliesleger nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Transportweg umfaßt:
    einen unbedeckten Transportweg (2a, 2b, 2c) zwischen der Eintrittszone (2a) und einem Sammelwagen (10), wobei dieser Transportweg unbedeckt von einem vorderen Förderband (2) getragen ist, das Teil der mindestens zwei endlose Förderbänder bildet,
    eine erste Krümmung (B), die auf dem Sammelwagen (10) zwischen dem unbedeckten Förderweg und einer Klemmzone (20) gebildet ist, die sich im wesentlichen geradlinig vom Sammelwagen (10) zum Ablegewagen (14) zwischen dem vorderen Förderband (2) und einem hinteren Förderband (5) erstreckt, das ebenfalls Teil der mindestens zwei Förderbänder ist,
    eine zweite Krümmung (C) von im wesentlichen 90°, die auf dem Ablegewagen (14) zwischen der Klemmzone (20) und dem Ablegespalt (38) gebildet wird,
    und daß die mindestens eine Krümmung, in der die Stützzone gemäß des genannten Profils geführt ist, die erste und die zweite Krümmung umfaßt,
    wobei das vordere Förderband (2) in der ersten Krümmung (B) das innere Förderband und in der zweiten Krümmung das die Stützzone (2g) bildende äußere Förderband bildet,
    wobei das hintere Förderband (5) in der zweiten Krümmung (C) das innere Förderband und in der ersten Krümmung (B) das die Stützzone bildende äußere Förderband bildet.
  27. Vliesleger nach Anspruch 14, 15 oder 26, dadurch gekennzeichnet, daß die Klemmzone (20) eine in Transportrichtung der Fasern leicht abfallende Neigung besitzt.
EP00911012A 1999-03-23 2000-03-21 Vliesleger Expired - Lifetime EP1163383B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9903562A FR2791364B1 (fr) 1999-03-23 1999-03-23 Etaleur-nappeur
FR9903562 1999-03-23
PCT/FR2000/000698 WO2000056960A1 (fr) 1999-03-23 2000-03-21 Etaleur-nappeur

Publications (2)

Publication Number Publication Date
EP1163383A1 EP1163383A1 (de) 2001-12-19
EP1163383B1 true EP1163383B1 (de) 2004-10-20

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US (1) US6550107B1 (de)
EP (1) EP1163383B1 (de)
JP (1) JP2002540303A (de)
AT (1) ATE280253T1 (de)
DE (1) DE60015102T2 (de)
ES (1) ES2231163T3 (de)
FR (1) FR2791364B1 (de)
WO (1) WO2000056960A1 (de)

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* Cited by examiner, † Cited by third party
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CN100429343C (zh) * 2003-12-31 2008-10-29 美商.V.F.T.有限公司 以长纤为原料制作而成具伸展性、高膨度的扁平管状结构的方法、结构及其成型装置
CA2454973C (en) * 2004-01-07 2007-12-18 V.F.T. Inc. Stretchable high-loft flat-tube structure from continuous filaments
EP1586688B1 (de) * 2004-04-15 2006-11-08 V.F.T.Inc. Dehnbare, voluminöse, flachrohrförmige Strukture aus endlosen Filamenten
DE202004020165U1 (de) * 2004-12-23 2006-05-04 Autefa Automation Gmbh Vliesleger
ITVI20050096A1 (it) 2005-04-04 2006-10-05 Studio Tex Nology Srl Faldatore per veli di carda e metodo di faldatura di detti veli realizzato con detto faldatore
EP1959038B1 (de) * 2007-02-15 2010-04-14 Oskar Dilo Maschinenfabrik KG Vorrichtung zum Legen eines Vlieses
FR2930563B1 (fr) 2008-04-28 2010-04-30 Asselin Thibeau Dispositif tampon et systeme de production d'une bande de non-tisse
ATE543930T1 (de) * 2008-08-21 2012-02-15 Dilo Kg Maschf Oskar Vorrichtung zum legen eines vlieses
FR2957092B1 (fr) 2010-03-08 2012-03-23 Asselin Thibeau Chariot mobile d'entree d'etaleur nappeur comportant un rouleau de detour avec cannelures ou annelures
DE202012102597U1 (de) * 2012-07-13 2013-10-14 Hi Tech Textile Holding Gmbh Vliesleger
FR3040398B1 (fr) 2015-09-02 2018-07-13 Andritz Asselin Thibeau Dispositif formant etaleur -nappeur et procede pour commander un etaleur-nappeur de ce genre
FR3040399B1 (fr) * 2015-09-02 2017-09-08 Andritz Asselin Thibeau Dispositif formant etaleur-nappeur a courroie
FR3063741A1 (fr) 2017-03-09 2018-09-14 Andritz Asselin Thibeau Etaleur nappeur
FR3081885B1 (fr) * 2018-05-31 2020-09-11 Andritz Asselin Thibeau Systeme de formation d’une nappe de fibres
IT201900008706A1 (it) 2019-06-12 2020-12-12 Mirco Battistella Faldatore per veli di carda

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DE60015102T2 (de) 2005-07-28
DE60015102D1 (de) 2004-11-25
JP2002540303A (ja) 2002-11-26
FR2791364B1 (fr) 2001-06-08
WO2000056960A1 (fr) 2000-09-28
US6550107B1 (en) 2003-04-22
EP1163383A1 (de) 2001-12-19
ES2231163T3 (es) 2005-05-16
ATE280253T1 (de) 2004-11-15
FR2791364A1 (fr) 2000-09-29

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