EP1036227B1 - Procede et dispositifs pour produire une nappe textile - Google Patents

Procede et dispositifs pour produire une nappe textile Download PDF

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Publication number
EP1036227B1
EP1036227B1 EP98954520A EP98954520A EP1036227B1 EP 1036227 B1 EP1036227 B1 EP 1036227B1 EP 98954520 A EP98954520 A EP 98954520A EP 98954520 A EP98954520 A EP 98954520A EP 1036227 B1 EP1036227 B1 EP 1036227B1
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EP
European Patent Office
Prior art keywords
web
speed
adjustment
elementary
crosslapper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP98954520A
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German (de)
English (en)
French (fr)
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EP1036227A1 (fr
Inventor
Bernard Jourde
Jean-Christophe Laune
Robert Jean
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.)
Andritz Asselin Thibeau SAS
Original Assignee
Asselin SA
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-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
    • D04H1/74—Non-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 orientated, e.g. in parallel (anisotropic fleeces)
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics

Definitions

  • the present invention relates to a method for producing a textile tablecloth by means of a spreader-lapper.
  • the present invention also relates to various devices allowing the implementation of this process.
  • the covering veil feeds a spreader-lapper in which the veil is folded alternately in one direction and in the other on a carpet of exit.
  • the tablecloth is thus composed of veil segments, tilted alternately in one direction and in the other, which is overlap. The folds between successive segments are aligned along the side edges of the produced web.
  • the sheet of fibers obtained is generally intended for a further consolidation processing for example by needling, coating, and / or etc ...
  • FR-A-2 234 395 teaches speed relationships that must be respected in the spreader-lapper to control the thickness of the sheet at all points of its width.
  • the sheet may have, in section transverse, a non-uniform thickness profile.
  • EP-B-0 371 948 describes a process intended for pre-compensate for faults occurring during consolidation subsequent, including needling, by varying locally the thickness of the covering veil introduced into the web-laying machine. This is achieved by adjusting so automatic speed of a card doffer relative at the speed of the card drum. The more the painter turns faster compared to the drum and more the veil formed by the painter has a reduced surface weight.
  • the method to produce a textile tablecloth in which we produce at minus an elementary veil, then by means of a spreader-lapper folding a covering veil incorporating said veil elementary, alternately in one direction and in the other on a transverse exit conveyor of the spreader-lapper is characterized in that by modifying appreciably according to a law periodic at least one adjustment upstream of the spreader-lapper we give the covering veil introduced in the spreader-lapper a surface weight which varies according to the direction longitudinal of the covering veil so that the covering obtained at the outlet of the spreader-lapper present on its width a distribution of surface weight substantially predetermined.
  • the setting that is changed to upstream of the spreader-lapper includes an adjustment affecting the card in an area downstream of a card drum, relative to the direction of transit of the fibers in the card, and regardless of the speed of rotation of a doffer taking fibers from the carding drum for constitute the elementary veil.
  • the last element at the exit of the card is in general constituted by an organ called detacher which detaches the veil of the last condenser roll, or of the painter in the absence of a condenser roller. It is also proposed according to the invention to adjust the surface weight of the veil in varying the action of the detacher.
  • this detacher is a rotary roller fitted with a seal device, we can vary the rotation speed of the detacher with respect to the rotary member, for example comb or condenser, located immediately upstream.
  • the input speed is fluctuated in the spreader-lapper so that it corresponds substantially, at all times, at the speed at which the veil reaches the spreader-lapper, and the length is adjusted at all times of a web accumulation path in the spreader-lapper to compensate for differences between instantaneous speed of entry into the spreader-lapper and the instantaneous speed at which the spreader-lapper unwinds the covering veil on the exit mat.
  • Known spreaders define a path accumulation of haze.
  • FR-A-2 234 395 teaches to do vary the length of this path so that the speed at which the lapper carriage unwinds the veil on the carpet exit varies and in particular is canceled when the the speed of the lapper carriage is itself zero at its points reverse motion.
  • the length of the sail is also varied accumulated in the spreader-lapper, but to compensate for fluctuations in the speed at which the topping veil enters the spreader-lapper due to the weight setting surface operated upstream.
  • length of delay the length of sail, between on the one hand a first sail section, in being deposited on the tablecloth being formed in the spreader-lapper, and on the other hand a second section of veil located at the point of the path of the fibers where said adjustment influences the surface weight of the elementary veil upstream of the spreader-lapper.
  • the delay length determines the delay length, and based on this determines the point of the width of the tablecloth where will be deposited the second section. We then adjust the surface weight of the second section according to the surface weight programmed for said point of the width of the sheet. If the spreader-lapper, by construction or by programming, unwinds the veil of topping on the exit conveyor at a speed which is always equal to the speed of movement of the lapper carriage, and if there is no stretching of the web upstream of the lapping carriage, the topping veil to be produced is the same as that would obtain by unfolding the tablecloth obtained to re-obtain the sail.
  • a central unit of the production system can then very quickly, for each position of the carriage lapper, referring to the table, know the position that will take in the width of the tablecloth the section of veil which is currently undergoing weight adjustment surface.
  • the central unit calculates the above table, and puts it into memory so you can then, during production, refer to each position of the lapper carriage.
  • the method according to the invention can be implemented at by means of a programmable control allowing the user to enter the weight distribution in a memory area desired for the covering veil arriving in a spreader-lapper carriage at each point of a lapper carriage stroke.
  • Programming can relate to a single run consisting of a return trip between the two race reversal points, or on a outward and back to allow the user to adjust differently the surface weight of the veil on the outward and return journey lapper carriage at at least one determined point of the width of the tablecloth.
  • variable draws at the exit of the lapper carriage are a inevitable disadvantage consisting of compressions to ends of the lapping carriage stroke.
  • the setting of areal weight of the covering veil according to the invention allows to compensate for this defect.
  • the sail sections covering intended to form the edges of the covering have a reduced surface weight.
  • the covering veil in superimposing at least two elementary sails.
  • Many cards have at least two combers producing each an elementary veil, so as to increase the production possible from a single card drum.
  • he is then possible to structure the covering veil in giving the two elementary sails contextures different.
  • one of the food sails can be condensed to give the fibers a curvy orientation on either side of the longitudinal direction, the other being less condensed or not condensed at all so that a certain dose of longitudinal fibers gives the veil of topping dimensional stability in the direction of length, particularly with regard to tensile forces.
  • the delay lengths can be different for the two elementary sails. So we have to provide a corresponding phase difference between the two settings performed at all times.
  • the lengths of delays are about the same for all sails elementary and that the speed variations undergone by the elementary sails are essentially the same, so that the elementary sails have substantially the same gears at the stacking station for elementary sails.
  • the delay lengths using different adjustment means, for example by adjusting the areal weight of an elementary veil by means of the comber and the surface weight of the other elementary sail using of the condenser.
  • one of the elementary veils undergoes relatively slow basis weight variations, operated by varying the speed of rotation of the drum with respect to the speed of rotation of the doffer, and that the other elementary veil undergoes the variations more abrupt, intended for example to produce a change thickness between two zones of the final consolidated product, by example by means of a variation of the spacing between the draftsman and card drum.
  • the device for implementing the method according to the first aspect comprises a sail production apparatus having at least two paths for producing a respective elementary sail, the two paths then joining at a overlapping post of the two sails, and is characterized in that it further comprises at least one means for adjusting, in operation, under the action of a programmable control, the thickness of at least one of the elementary webs, so that the web covering obtained by superposition of the elementary webs has a thickness which varies according to its longitudinal direction.
  • the device includes a card 1 and a spreader-lapper 2.
  • Card 1 includes a frame 3 supporting in rotation a carding drum 4 rotated by a motor 6.
  • the frame 3 also supports at least one "food” 7 essentially comprising a conveyor belt driven in rotation by a motor 8.
  • Food 7 causes fibers textiles 9 coming from a reserve and disposing of them, in general through at least one cylinder 10, on the periphery of the drum 4.
  • the food 7 renews regularly a layer of fibers 11 at the periphery of the drum 4.
  • cylinders of known type, such as 12, (of which only one pair is shown for clarity) which serve to work the fibers and in particular to orient them circumferentially at the periphery of the drum 4.
  • Fibers from food 7 reach the drum 4 in the beginning of the rising zone of the periphery drum 4.
  • each comber 13a, 13b consisting of a cylinder rotating around its axis parallel to that of drum 4 by means of a specific motor 14a, 14b.
  • a specific motor 14a, 14b there is between each comb 13a, 13b and the periphery of the drum 4 a spacing chosen so that each painter 13a, 13b, thanks to an appropriate lining of its cylindrical periphery, takes part of the fibers 11 driven in rotation by the drum 4 to form with these fibers an elementary veil 15a, 15b.
  • the elementary veil 15a after performing a fraction of a turn at the periphery of the painter 13a, is taken up by a cylinder detacher 19a to be placed on an intermediate conveyor 21 driven by a specific motor 22.
  • the elementary veil 15b after having carried out a fraction of a turn on the periphery of the painter 13b, is taken over by a succession of two condenser cylinders 17, 18 then, from there, by a detaching cylinder 19b.
  • the condenser cylinders 17, 18 and the two cylinders detachers 19a, 19b have axes parallel to the combers 13a, 13b and have much larger outside diameters weaker than the cylinders of the combers.
  • detaching cylinders 19a, 19b are themselves smaller diameter than the condenser cylinders 17, 18.
  • the first condensing cylinder 17 is substantially tangent to the periphery of the painter cylinder 13b, with however a gap between them. The same goes for the second condenser cylinder 18 relative to the first condenser cylinder 17, and detaching cylinder 19a relative to the painter cylinder 13a and the detaching cylinder 19b relative to the second condenser cylinder 18.
  • the condenser cylinder 17 has a peripheral speed lower than that of the painter 13b located just upstream of so as to cause an increase in the surface weight of the veil, accompanied by a sinuous orientation of the fibers in the veil.
  • the condensing cylinder 18 rotates at a lower speed than the cylinder condenser 17.
  • Figure 1 illustrates with arrows that, so classic, wherever cylinders are noticeably tangents by their periphery, the speeds at the periphery are oriented in the same direction, except for the detachers 19a, 19b which therefore cause a reversal of the meaning displacement of the fibers in the vicinity of the point of tangency with the rotary element 13a and respectively 18 above.
  • the detacher 19b deposits the second elementary veil 15b directly on a conveyor belt before 24 of the spreader lapper 2 and more particularly on a section 23 by which this mat enters the lapper spreader 2.
  • the conveyor intermediate 21 deposits the first elementary veil 15a on the section 23 above the elementary web 15b deposited in upstream so as to compose a covering veil 16 with the superposition of elementary webs 15a and 15b.
  • the function of the spreader-lapper 2 is to deposit the veil 16 in a zig-zag on an exit mat 26 moving perpendicular to the direction of entry of the veil of topping 16 in the spreader-lapper.
  • the management of displacement of the output belt 26 is therefore roughly perpendicular to the plane of Figure 1.
  • the spreader-lapper comprises a lapper carriage 27 which moves back and forth over the exit mat 26 parallel to the width of it.
  • the table topper 27 has a slot 28 above the output belt 26 which the covering veil 16 is unwound at a point variable width of the exit belt 26.
  • the spreader-lapper also includes a carriage accumulator 29 movable back and forth above the carriage lapper 27 and parallel thereto.
  • the front belt 24 makes a turn to 180 ° on two rollers 33 carried by the accumulator carriage 29 then defines one of the sides of the unwinding slot 28 bypassing a roller 34 carried by the lapping carriage 27. Then, the front belt 24 follows a return path on different fixed rollers 36, passing through a loop 180 ° on a roller 37 carried by a compensating carriage 38 which moves at all times at equal speed and in direction opposite of the accumulator carriage 29.
  • the length of the path followed by the mat 24 is always the same because all variation in the length of the loop formed by the belt 24 on the accumulator carriage 29 is compensated by a contrary variation in the length of the loop formed by the belt 24 on the compensating carriage 38.
  • the covering veil 16 moves substantially along of the outer face of the front belt 24 from the section inlet 23 to the feed slot 28.
  • the web of topping 16 therefore forms a length accumulation loop variable around the rollers 33 of the accumulator carriage 29 in depending on the position of this carriage along its travel back and forth.
  • the accumulator trolley 29 is moved so as to vary the length of the accumulation loop to accumulate sail when the constant input speed is greater than the instantaneous speed at which the lapper carriage unwinds the veil on the exit mat, and to restore a part from this loop to the lapper carriage in the case opposite.
  • the accumulator trolley only serves to keep a constant sail length in the spreader-lapper whatever either the position of the lapper carriage along its travel back and forth.
  • the covering veil 16 is supported, on the side opposite the front mat 24, by a rear belt 41.
  • This passes over rollers 42 carried by the accumulator carriage 29 and bypasses on the carriage lapper 27 a roller 43 on which the rear carpet defines the other side of the unwinding slot 28, facing the roller 34.
  • the rest of the path of the rear carpet 41 is defined by fixed position rotary rollers 44, 46, also passing by a 180 ° loop on a roller 47 carried by a carriage compensator 48 which is constantly moving at speed equal and in opposite direction of the lapper carriage 27.
  • the path followed by the rear belt 41 has a constant length because any variation in the length of the 180 ° loop formed by the rear belt 41 around the roller 43 of the carriage lapper 27 is compensated by an opposite variation of the length of the 180 ° loop formed by the same mat on the compensating carriage 48.
  • the accumulator cart 29 is connected to the cart compensator 38 associated by means of an inextensible cable 49 making a global 180 ° turn between one of its ends coupled to the accumulator carriage 29 and its other end coupled to the associated compensating carriage 38.
  • This 180 ° turn is carried out at least in part on a pulley drive 51 coupled to a two-wheel drive motor 52 direction of travel which is of the servo-motor type, stepper motor not, or the like.
  • the cable 49 pulls the accumulator cart 29 or respectively the cart compensator 38 in the direction extending the loop formed on him by the carpet before 24. Considering the length unchanging of the carpet before 24, the other loop must necessarily shorten and bring the other cart back into the intended meaning.
  • a second cable can connect the accumulator carriage 29 and its compensating carriage 38 in passing on the other side of the exit mat, as described in EP-B-522 893.
  • the control of the lapper carriage 27 and the carriage associated compensator 48 is produced substantially from the as described for the accumulator carriage 29 and the carriage associated compensator 38.
  • a cable 53 connects the two carriages 27, 48 by performing a 180 ° turn at least partially on a pulley 54 mounted in a fixed position and connected to a servo motor, stepping motor or the like with two directions of travel 56. In each of its directions of movement, the motor 56 pulls the carriage 27 or 48 in the direction extending the loop made on this carriage by the rear carpet 41. The other carriage is then moves in the opposite direction thanks to the invariability the length of the rear carpet 41 or using a cable additional passing through the other side of the exit belt 26.
  • the speed of movement of the front belt 24 is defined by a servo motor, stepper motor or analog 57 associated with one 31 of the fixed cylinders supporting the front belt 24 in the entry section 23.
  • the speed of circulation of the rear belt 41 is defined by a servo motor, stepper motor or the like 58 associated with the cylinder fixed 44 supporting the rear belt 41 along its section return between the compensating carriage 48 and the accumulator trolley 29.
  • the covering veil 16 is routed by the inlet section 23 of the front belt 24, crosses then the accumulator cart 29 then the lapper cart 27, and forms segments on the output belt 26 which overlap with an obliquity alternately in a sense and in the other.
  • the rear edges of these segments, relative to the direction of movement of the output belt 26, are visible at 59 in Figure 2.
  • the spreader-lapper also includes a command 61 which manages the positions at all times respective angulars to be produced by motors 52 and 56 of control of the position of the accumulator carts 29 and lapper 27 along their back and forth course, and by the two motors 57 and 58 defining the circulation of the carpet front 24 and rear carpet 41.
  • the control unit 61 can also control a motor drive belt 26 according to a method known, for example at a constant speed or on the contrary a speed proportional to that of the lapper carriage 27 as FR-A-2 234 395 teaches.
  • the device further comprises a control unit 62 associated with the card and commanding in a coordinated manner the rotational speed of motors 6, 8, 14a, 14b and 22 already described and shown as well as various other motors, not shown for reasons of clarity, including the detaching cylinder 19a, the condensing cylinders 17 and 18 and the detaching cylinder 19b respectively. All these engines are able, if necessary using a loop regulation passing through the control unit 62, to execute a speed instruction and preferably even a angular position instruction determined at each instant, from which it also results in a speed of rotation determined at all times.
  • One of the control units preferably the control unit command 61 associated with spreader-lapper 2 is programmable in a way that allows the operator to define, for each position of the lapping carriage 27 along its travel back and forth, the desired surface weight for the veil of nappage 16 in the section undergoing deposition by the carriage lapper 27 on the output belt. So whenever the lapper carriage will pass at a determined point in its travel back and forth, the covering veil 16 will have a surface weight determined and consequently the tablecloth produced, consisting of all points of a constant number of sail segments superimposed, will itself, at each point of its width, a areal weight respectively determined. This programming is possible before the start of a production, perfected realizations allowing to modify the programming during operation.
  • the area weight setting can also consist, at least in part, in a variation of the speed of carding drum 4. Plus carding drum rotates quickly compared to the combers 13a and 13b, the more elementary sails 15a and 15b collected by them are heavy, per unit area.
  • a variation in the speed of rotation of the drum 4 can if necessary be accompanied by a corresponding variation in the speed of rotation of motors driving the fiber transfer devices located upstream, namely the food 7 and the cylinder 10 in the example shown.
  • the setting can also affect one and / or the other combers 13a and 13b. If their engine drives them to a higher speed compared to carding drum 4 they produce elementary sails 15a at faster speed and 15b having a lower surface weight. On the contrary, if we slow down the rotation speed of at least one of the combers 13a or 13b, this produces at lower speed a veil having a greater surface weight. all variation of the speed of rotation of a doffer for the purpose to modify the surface weight of the elementary veil must be accompanied by a corresponding variation, i.e.
  • Adjusting the surface weight of at least one veil elementary 15a or 15b can also consist of an adjustment of the speed of rotation of the condensers 17 and 18 with respect to the speed of the doffer 13b located upstream, so that more or less condensing the elementary veil produced by the painter 13b.
  • the condensation is all the stronger, and by consequently the surface weight all the higher, as the condenser speed is reduced compared to that of painter 13b.
  • the speeds of transfer defined by the detacher 19b and the section input 23 of the spreader-lapper vary in proportion to that of the condenser 18, if we want these elements located downstream of the condenser 18 transmit without modification the variations in surface weight of the elementary veil 15b.
  • FIG. 1 Another mode of realization of card 1, according to which at least one painter 13, as well as the condenser 17, 18 and the detacher 19 associated are all supported on a cart 63 which is mobile relative to the frame 3 of the card 1 in a direction of translation varying the spacing E between the drum card 4 and the painter 13.
  • the movement of the carriage 63 is controlled by a positioning motor 64 receiving control signals from the control unit 62.
  • the motor 64 actuates the carriage 63 for example by means of a screw mechanism 66.
  • the area weight adjustment by variation of the distance between the comber (s) and the card drum is very advantageous because it does not impose any speed variation, neither upstream nor downstream.
  • elementary sails having different surface weights and varying so different or time-shifted one from the other can be produced and delivered to the post of superimposition at a constant speed which is the same for the at least two elementary sails, this speed being also that of the inlet section 23, in principle.
  • the central unit 61 sends an instruction to the motor 57 to adjust the speed of the motor 31 in correspondence so as to give the input speed V 1 of the belt before 24 the suitable value.
  • the lapping carriage 27 can for example follow a predetermined periodic speed law, according to which the value of the speed of movement W of the lapping carriage 27 is determined for each point of the reciprocating stroke.
  • the motor 52 for driving the lapping carriage 27 is controlled so as to generate the desired speed law for the speed of movement W of the lapping carriage 27 as a function of its position along its reciprocating stroke.
  • V 1 and W being fixed at each instant as has just been said, the relation (R2) gives the value "U", the stretching factor "k” being also programmed or in any case known from the construction of the spreader for each point of the stroke of the lapping carriage 27.
  • the motor 52 for driving the accumulator carriage 29 to give it the speed U determined as we have just expose according to relation (R2).
  • V 1 medium V 3 way on each round trip of the lapper carriage.
  • the motors 57 and 58 can also train, each, any other guide roller for the mat respectively associated.
  • Figure 5 schematically illustrates the production, on the output belt 26 of the spreader-lapper which is not entirely represented, of a sheet 67 by means of a covering veil 16 whose surface weight varies thanks to to an adjustment made in card 1 which also is only partially shown.
  • the covering veil 16 is obtained from a single veil elementary 15 whose surface weight is adjusted by variation of the rotator speed 13.
  • a first step also, it will be considered that there is no element between the comber 13 and the lapping carriage 27 of the spreader-lapper, such as a condenser or the like varying the surface weight and / or the circulation speed of the veil 15, 16. It is further assumed that the speed V 3 at which the veil 16 is unwound through the lapping carriage 27 is permanently equal to the absolute value of the speed W of translation of the lapping carriage, so that none stretching or compression does not occur at the time of deposition on the output belt 26.
  • the sheet 67 is generally intended to be consolidated in a consolidation machine such as for example a needling machine which must produce a continuous textile product 68 on an output belt 69 of the consolidation machine or other suitable support.
  • a consolidation machine such as for example a needling machine which must produce a continuous textile product 68 on an output belt 69 of the consolidation machine or other suitable support.
  • the thickness of product 68 was greatly exaggerated by compared to the width shown. It is also illustrated that consolidated product 68 is slightly narrower that tablecloth 67 as a result of a certain shrinkage which, from known manner, is generated by the needling process.
  • the invention aims to manufacture a textile product having, over part of its width from on one edge, a relatively thick area 681, on another part of its width from the other edge an area 682 thinner, and between them a transition zone 683.
  • a textile product can be useful for certain applications, especially for the floor mats used in the automobile, the part 682 is thinner, therefore less robust, used to fill areas less exposed to wear, like for example the vertical part going up towards the threshold door.
  • the speed of the comber 13 is adjusted. so that each section of sail takes, where it undergoes the weight per area adjustment, a value of areal weight corresponding to that which will be desired taking into account the position where the lapper carriage will be 27 along its back and forth stroke when that same section will in turn be deposited by the lapper carriage.
  • the lapping carriage 27 will have, when the section S 2 is being deposited, a position that one can foresee, for example position 27a in the situation represented in FIG. 5.
  • This position 27a is represented in dotted lines, it corresponds to a determined surface weight and therefore the speed of the motor 14 is controlled so that this surface weight either made by the painter 13 in section S 2 .
  • the control unit 61 takes into account the respective positions of the carriages 27 and 29. It knows these positions from the angular positions of the motors 52 and 56 which control the position of the carriages 29 and 27 respectively. With this information, the control unit 61 is able to calculate the length of sail .15, 16 between the sections S 1 and S 2 even if this length varies. We have seen that this length could vary to allow the input speed V 1 and / or the speed V 3 to vary.
  • the web 15, 16 undergoes at a point in its path between the sections S 2 and S 1 a drawing operation (true drawing or compression) with a drawing factor k 2 as indicated in point 71 , the entire length between section S 2 and point 71 must be taken into account not for its actual value but for a corrected value corresponding to the actual length multiplied by the factor k 2 .
  • a process is explained to adjust the surface weight in a coordinated manner on two elementary sails 15a and 15b which contribute, all two in the same proportions, in each section transverse of the web 16, to create variations in thickness desired for the web 16 along its length.
  • the surface weight of each of the sails 15a and 15b is modified by varying the spacing between each painter 13a or 13b and the drum 4. It is further assumed that the sections S2 of the web 15a and S3 of the web 15b which undergo the surface weight adjustment are separated by lengths of web different from the section S 1 undergoing the deposition. It is intended according to the invention to calculate these two delay lengths separately and to control the two adjusting members, that is to say in the example the two combers 13a and 13b, in a differentiated manner so that the thickness variations produced coincide with each other when the two elementary webs are superimposed at 72 so that the covering web 16 has the desired surface weight at the time of deposition on the web 67 at each point.
  • the two elementary veils 15a and 15b vary by achieving at every point in the length of the covering veil each a constant proportion of the surface weight of the covering veil 16, it is understood that the elementary veil having the most long journey to be covered undergoes in time advance over the other each modification of thickness desired for the covering veil 16.
  • each veil elementary 15a or 15b achieves a variable proportion of the areal weight of the covering veil 16 along the length of the latter, it will be understood that the surface weight elementary veil with the longest distance to travel must be settled with greater temporal anticipation than the other elementary veil.
  • the difference between commands applied to the two combers 13a and 13b is therefore a time lag, although this offset may need to vary if the speed at which the web 16 enters the spreader varies and / or if the speed at which the veil is deposited on the sheet 67 already constituted varied.
  • the motors 14a and 14b are controlled so that the rotational speeds of the two combers 13a and 13b undergo variations which are at each instant in the same proportion with respect to each other, so that the production speeds of the elementary webs 15a and 15b are, at each instant, substantially equal to each other.
  • the two elementary webs 15a and 15b arrive at the same speed, which varies over time, and it is at all times possible, in particular by appropriate control of the movement of the accumulator carriage 29, to give the section d entry 23 of the front belt 24 of the spreader-lapper (FIG. 4) a speed corresponding to the speed of arrival of the web 16 at this instant.
  • the special feature of equalizing the two delay lengths as much as possible can be achieved by adjusting the surface weight of each sail with different means, respectively.
  • the other layout also shown in Figure 6 but independent of the use of two elementary sails 15a and 15b, relates to the production of thinned edge zones 674 and 676, for example to pre-compensate a classic fault thickening of edge areas 684 and 686, product by needling. With thinned edge areas 674 and 676 of FIG. 6, these extra thicknesses are eliminated and the profile of the edge zones of the needled product takes the form shown in phantom in Figure 5.
  • edge zones it is possible, for example by means of an appropriate control of the motor 14a and / or of the motor 14b, to correspondingly modify the longitudinal profile of at least one of the elementary webs 15a and 15b. It is also possible to create in these zones a reduction in the speed V 3 of unwinding of the web by the lapping carriage 27, compared to the absolute speed
  • one of the possible calculation methods for determining the thickness settings to give to sections S2 and S3 consists in reasoning in fictitious strokes of the lapping carriage 27.
  • a fictitious stroke is that which the lapping carriage would have carried out if it had moved at every moment with a speed whose absolute value
  • a central table 61 is created in correspondence between each point of the fictitious course, each point of the real course and the desired surface weight for the covering veil, before stretching, at each of these points.
  • the invention can be used to produce using adjustment means provided in the card a ply profile which is simply intended to compensate for defects in excess thickness at the edges introduced into the needling machine or other consolidation machine, or in certain types of less sophisticated design able to control the speed of unwinding the veil all points of the lapping carriage stroke.
  • the adjustment made on the veil 15b could be used to achieve the two zones 671 and 672 of different thickness as well as the transition zone 673 and the veil 16a could undergo the settings producing thinned edges 674 and 676.
  • control unit 61 of the spreader-lapper has a master role in the implementation of the process.
  • This control unit 61 sends the machine production of sail and in particular to its control unit 62 of the instructions which the control unit 62 transforms into commands applied to the motor (s) affecting the adjustment of the areal weight of the elementary veil (s).
  • House could also conceive of programming being done on the control unit 62 of the production machine veil, which could then, at any moment, call for the control unit 61 of the spreader-lapper the information which it would need to determine at all times the commands to apply, especially information relating to the position of the two carriages 27, 29.
  • the unit of command 62 may take, at least in part, the form of a reported intermediate module, capable of taking into account and inject into the machine control circuit production of variable setpoints for motors affecting the area weight setting.
  • the unit of command 61 may include outputs capable of being directly connected to the sail production machine.
  • the invention enables all kinds of profiling, especially with more than two thickness zones different across the width of the tablecloth, or with a profile of thickness which varies throughout at least one area or the entire width of the web, to produce a profile which can be concave, convex or alternatively concave and convex.
  • the invention is not limited to assemblies in which possible variations in production speed of the veil are compensated by variation of an accumulation in the spreader-lapper. It is also possible to do vary the working speed of the whole spreader-lapper, and for example to create a variable accumulation in downstream of the spreader-lapper or to vary so corresponding to the speed of the following machines, such qu'aiguilleteuse.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
EP98954520A 1997-11-07 1998-11-05 Procede et dispositifs pour produire une nappe textile Revoked EP1036227B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9714065 1997-11-07
FR9714065A FR2770855B1 (fr) 1997-11-07 1997-11-07 Procede et dispositif pour produire une nappe textile
PCT/FR1998/002364 WO1999024650A1 (fr) 1997-11-07 1998-11-05 Procede et dispositifs pour produire une nappe textile

Publications (2)

Publication Number Publication Date
EP1036227A1 EP1036227A1 (fr) 2000-09-20
EP1036227B1 true EP1036227B1 (fr) 2004-08-18

Family

ID=9513190

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EP98954520A Revoked EP1036227B1 (fr) 1997-11-07 1998-11-05 Procede et dispositifs pour produire une nappe textile

Country Status (11)

Country Link
US (1) US6195844B1 (es)
EP (1) EP1036227B1 (es)
JP (1) JP2001522949A (es)
KR (1) KR20010031853A (es)
CN (1) CN1188556C (es)
AT (1) ATE274081T1 (es)
CA (1) CA2310121A1 (es)
DE (1) DE69825782T2 (es)
ES (1) ES2227887T3 (es)
FR (1) FR2770855B1 (es)
WO (1) WO1999024650A1 (es)

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CN105442104B (zh) * 2015-12-17 2017-07-07 江苏迎阳无纺机械有限公司 梳理机的辊轴轴承座组合调整装置
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WO2019016722A1 (en) * 2017-07-19 2019-01-24 Ferraro S.P.A. FOLDING DEVICE

Also Published As

Publication number Publication date
ATE274081T1 (de) 2004-09-15
DE69825782D1 (de) 2004-09-23
CN1188556C (zh) 2005-02-09
FR2770855A1 (fr) 1999-05-14
CN1285011A (zh) 2001-02-21
ES2227887T3 (es) 2005-04-01
EP1036227A1 (fr) 2000-09-20
DE69825782T2 (de) 2005-09-01
WO1999024650A1 (fr) 1999-05-20
JP2001522949A (ja) 2001-11-20
KR20010031853A (ko) 2001-04-16
CA2310121A1 (fr) 1999-05-20
FR2770855B1 (fr) 2000-01-28
US6195844B1 (en) 2001-03-06

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