EP2868791A1 - Thread take-up in a device for treating synthetic thread - Google Patents

Thread take-up in a device for treating synthetic thread Download PDF

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Publication number
EP2868791A1
EP2868791A1 EP20130306484 EP13306484A EP2868791A1 EP 2868791 A1 EP2868791 A1 EP 2868791A1 EP 20130306484 EP20130306484 EP 20130306484 EP 13306484 A EP13306484 A EP 13306484A EP 2868791 A1 EP2868791 A1 EP 2868791A1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
recovery
wire
heat
setting
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.)
Withdrawn
Application number
EP20130306484
Other languages
German (de)
French (fr)
Inventor
François Saura
Serge Munschi
Philippe Massotte
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.)
Superba SAS
Original Assignee
Superba SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Superba SAS filed Critical Superba SAS
Priority to EP20130306484 priority Critical patent/EP2868791A1/en
Priority to TR2014/00282A priority patent/TR201400282A2/en
Publication of EP2868791A1 publication Critical patent/EP2868791A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B17/00—Storing of textile materials in association with the treatment of the materials by liquids, gases or vapours
    • D06B17/005—Storing of textile materials in association with the treatment of the materials by liquids, gases or vapours in helical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/30—Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/313—Synthetic polymer threads

Definitions

  • the present invention relates to the field of synthetic wire processing, in particular that of equipment used in the complete lines of shaping of synthetic thread.
  • the son are generally deposited in a sheet on a conveyor belt which brings them into a heat-setting chamber in which they undergo a heat treatment having the effect of setting their shape, thanks to steam.
  • the son laid in a web on the conveyor belt can come directly from the feed coils, and then be deposited in the form of turns.
  • the synthetic thread can pass through a crimping step in a curling box.
  • the wires are then deposited in bulk on the conveyor belt.
  • a curling box conventionally comprises a pair of counter-rotating rollers, which bring its curl to the thread.
  • a cooling unit is conventionally mounted downstream of the heat-setting enclosure.
  • the yarns are finally removed from the conveyor belt as a strand by a thread take-up device, and then stored on the reels of a rack.
  • the thread take-up device generally operates by pulling the threads up, thereby separating them from the conveyor belt, and it is particularly important to control where the threads are separated from the conveyor belt.
  • the recovery zone that is to say the place where the wires deviate from the conveyor belt and separate from the sheet, must thus be constantly monitored and be in a specific location of the line, or window of recovery, delimited, on the side of the heat-setting enclosure, by a lower limit, and, on the opposite side, by an upper limit.
  • the edge of the web may not be clear, especially given the texture given before the son, and this detection can then be made more difficult.
  • the consequent regulation is thus made less reliable and precise.
  • Another source of difficulties is an irregular arrangement of the threads in the heart of the web, which can lead to holes and clusters of threads, making the measurement of an optical intensity difficult to represent the state of the web.
  • the wires are normally free on the conveyor belt makes the control more delicate.
  • the ambient brightness may also have an impact on the amount of light received by the detection cell.
  • the invention aims essentially to improve the recovery of wire, and in particular to better detect the location of the recovery zone.
  • the invention proposes in particular to have the recovery zone in the fixed cooling unit, where a circulation of air can often keep the son against the carpet, whether in the form of a sheet or strand, or to modify the principle of detection of the zone of recovery and to analyze rather the geometry.
  • the subject of the invention is a wire treatment device comprising a heat-setting enclosure, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the wires are deposited. , in bulk or in loops, in the form of a sheet and circulate in the heat-setting chamber, and a thread recovery device, for pulling the son of the conveyor belt after heat-fixing.
  • This device is characterized in that it further comprises a fixed wire cooling unit acting downstream of the heat-setting, and in that the recovery device removes the conveyor belt wire at a zone recovery that is normally found in the cooling unit.
  • a wire cooling unit for a wire treatment device comprising a heat-setting chamber, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the son are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure, as well as a thread take-up device, for pulling the conveyor belt threads after heat setting at a recovery zone which is normally in the cooling unit, said wire cooling unit being intended for fixed mounting downstream of the heat setting.
  • This cooling unit is characterized in that it has a detection means for detecting the end of the sheet of yarns from which the recovery device pulls the threads, and thus check the presence of the recovery zone within of the recovery window.
  • a detection means for a son treatment device comprising a heat-setting enclosure, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the son are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure, and a thread take-up device, for pulling the threads of the conveyor belt after heat-fixing, said detection means for detecting the end of the thread sheet from which the take-up device pulls the threads, and thus to check the presence of the pick-up area within the pickup window.
  • This detection means is characterized in that it analyzes the geometry of the sheet in the recovery window.
  • the treatment line illustrated in figure 1 thus shows a complete wire processing device 1, comprising a heat-setting enclosure 3, possibly closed at each of its ends by a sealing head 4 each comprising two rollers, a conveyor belt 5, on which the threads are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting chamber 3, and a device 6 thread recovery, for pulling the threads of the conveyor belt 5 after heat-setting, in particular for pulling them in the form of strand.
  • the carpet 5 is preferably such that air can flow through it, or even light and has openings for this purpose.
  • the son undergo a heat treatment in the enclosure 3 heat-setting, thanks to the steam that circulates there.
  • the enclosure 3 may be in the form of an elongate body open at its ends, or have roll seal heads.
  • the processing device 1 also comprises an upstream wire feeding rack which are then in the form of coils.
  • the yarns then pass through a curling box 2 which forms a texturing means 2.
  • the yarns are pressed into this curling box 2 by means of two counter-rotating rollers, or also by means of an inlet roll disposed upstream of said rollers of crimp parallel to them and against which circulate said son before passing between the rollers.
  • This texturing means 2 is not essential, and other means of texturing, or even microtexturation may be provided in addition or alternatively.
  • the processing device 1 thus comprises a wire texturing means 2, upstream of the heat-setting chamber 3 and in the form of a curling box which comprises a pair of counter-rotating crimping rollers.
  • the yarns are then deposited in a sheet on a conveyor belt to circulate in the heat-setting chamber 3, the latter being sealed at its ends by each time a sealing head 4, having two counter-rotating rollers, between which circulates said carpet 5.
  • the son After treatment, the son are released in the form of strands of the carpet 5 by simple traction performed by the recovery device 6. After passing through the recovery device 6, the son are stored on reels, after a possible passage through an accumulator .
  • the processing device 1 further comprises a fixed wire cooling unit 7 acting downstream of the heat-setting, thanks to a flow of air.
  • the cooling unit 7 comprises an air ventilation which has the effect of pressing the son, in a sheet or strand, against the conveyor belt.
  • the cooling unit 7 comprises a hollow box 8 above which circulates the conveyor belt 5, the ventilation having the effect of extracting air. This cooling unit 7 is therefore intended for fixed mounting downstream of the heat-setting.
  • the son During transportation on the carpet 5, the son are arranged in a sheet, resting on the surface of the carpet 5.
  • the recovery device 6 pulls the son present on the surface of the carpet 5, from a point offset from the plane in which the carpet travels. 5.
  • the son in the form of strand, moves away from the belt 5 towards this point of traction of the recovery device 6, leaving the surface of the belt 5 at a location of the treatment device 1, here named zone of recovery. Since the yarn, when pulled by the recovery device 6, is still in the form of a sheet occupying a certain width on the carpet 5, the recovery zone also extends over part of the width of the carpet 5 , especially over the entire width of the carpet 5. This recovery zone materializes the front of the web from which the son are removed in the form of strand.
  • a good execution of the treatment process requires that the recovery zone, and therefore the place where the threads move away from the web and offset from the plane of the belt 5, is between two fixed limits with respect to the processing device 1.
  • a first limit is upstream of the wire processing steps, namely towards the heat-setting chamber 3, and a second is downstream of the wire processing steps.
  • the recovery device 6 pulls the yarns from the web at its own speed, and the web advances, meanwhile, thanks to the belt 5 which can have a speed independent of that caused by the recovery device 6.
  • the rate of recovery is excessive compared to the displacement of the web. It is therefore necessary to slow down the recovery to prevent the recovery device from absorbing too much upstream wire in the process.
  • the recovery zone approaches the limit downstream of the process, the recovery rate is not sufficient compared to the movement of the web. It is then necessary to accelerate the recovery to prevent the sheet reaches an excessive volume relative to the space that is devolved thereon on the processing device 1.
  • the thread take-up device 6 comprises a regulation means which takes into account the detected position of the sheet of threads, in particular in the cooling unit 7, to adjust the speed with which the recovery device 6 pulls the strand of the sheet.
  • the processing device 1 prefferably, the processing device 1 to be provided with means for detecting the position of the thread recovery zone between fixed marks.
  • the detection means analyzes the geometry of the web in the recovery window, between the lower limit and the upper limit, over the width of the belt 5.
  • the son being however positioned on the belt 5 in the form of a free web, its maintenance and therefore the position of the recovery zone can be difficult to ensure. It is therefore advantageous to provide a recovery zone at a stage of the process where the wires can be stabilized on the belt 5. It is thus preferable to provide a wire recovery zone in the cooling unit 7.
  • the belt 5, on which the son are then arranged in a sheet circulates in a box 8 from which the air is sucked, so as to create a flow of air through the carpet 5 and around the wires, to cool them.
  • This suction has the effect of exerting a force on the son of the sheet so that they are pressed against the surface of the belt 5 and are thus stabilized.
  • the recovery device 6 removes the conveyor belt thread at a recovery zone which is normally located in the cooling unit 7, the recovery window being thus in said unit, so that the window recovery is provided where the cooling unit 7 plates the wire against the conveyor belt 5.
  • the casing 8 has a lateral outlet at the level of which is mounted a ventilation propeller, which Extracts the air from the box 8.
  • the conveyor belt 5 travels flat above the box 8 and thus forms the top wall. The other walls do not allow air circulation and it is through the carpet 5 that the air arrives in the box 8 to then be expelled by the side outlet.
  • the belt 5 thus has sufficient perforations through which air can circulate, and it is between the suction unit and the sheet of son.
  • the box 8 is mounted on a frame having a horizontal base wall and four legs extending from said wall, the belt 5 flowing under this wall on its return to the upstream phases of the process.
  • the device of 1 advantageously has a means of detecting the recovery zone, that is to say a means for detecting the edge of the web where the son are separated in strand, in order to provide a signal useful to a control loop that drives the recovery device 6, so that the recovery zone is in the predefined recovery window, between the two limits already mentioned.
  • the detection means advantageously operates by an observation of the geometrical form that takes the son in the window of recovery, and analyzes this form to identify the front of the sheet, and thus the departure of the strands, that is to say to identify a recovery zone.
  • the detection means therefore identifies the contours of the sheet and a calculator performs the calculation necessary to identify the area of the sheet. recovery, since it is the area from which the sheet breaks down into strands, which can be observed visually. It thus geometrically detects the profile presented by all the son disposed on the carpet 5.
  • the detection means comprises, on the one hand, an illumination means 9, placed on one side of the conveyor belt 5, and on the other hand, an optical detection cell 10 placed on the other side of the conveyor belt, and preferably also a computer for implementing a method of geometric analysis of the web in the recovery window.
  • the detection means thus comprises a detection cell 10, which displays the wires as they are arranged on the carpet 5.
  • a detection cell 10 which displays the wires as they are arranged on the carpet 5.
  • the illumination means 9 therefore project light towards the detection cell 10, the conveyor belt being situated between the illumination means 9 and said detection cell 10.
  • the conveyor belt 5 has openings which allow enough light to pass through so that it is essentially stopped only by the threads on the carpet 5.
  • the wires arranged in a sheet significantly obstruct the flow of light, while the son in the form of strand, distant from each other, more easily circulate light.
  • the detection cell 10 can therefore differentiate the son in the form of a sheet, characterized by a very low light intensity, the son in the form of strands pulled by the recovery device 6, characterized by a higher light intensity.
  • the full luminous power corresponds, of course, to a recovery window devoid of wires.
  • the detection cell 10 is normally able to observe the location of the wires on the conveyor belt between the two previously mentioned boundaries.
  • the detection cell 10 comprises a camera.
  • the detection cell 10 can thus take the form of a camera or a vision sensor, which sends a signal to a computer that analyzes the geometry identified to identify the area of recovery.
  • the illumination means 9 can also take different forms.
  • the illumination means 9 takes the form of at least one elongate light source 11 extending substantially in the direction of travel of the conveyor belt.
  • the illumination means 9 takes the form of at least one elongated light source 11, extending substantially parallel to the conveyor belt, transversely to its direction of travel.
  • the illumination means 9 takes the form of a pair of elongated light sources 11, each oriented towards the optical detection cell 10, arranged perpendicular to the direction of movement of the belt 5, in parallel on the carpet 5.
  • the at least one light source 11 may take the form of a neon tube or a series of light-emitting diodes.
  • the illumination means 9 comprises two elongated light sources 11 placed under the conveyor belt, one being disposed in the box 8, and the other outside. They are therefore separated by a wall of the box 8, and generally located where the mat 5 leaves the box 8, so that the maintenance exerted on the son during cooling is maximum.
  • the detection means is therefore generally placed at the outlet of the box 8, and the detection cell 10 is thus above the belt, at the level of the zone from which it leaves the box 8.
  • the illuminating means 9 takes the form of a slab, extending substantially parallel to the conveyor belt. Such a light slab extends both in the direction of movement of the belt 5 and perpendicular to it.
  • the illumination means 9 is therefore capable of sending enough light power through the entire recovery window to allow detection by the detection cell 10 in the case where the wire does not obstruct the circulation. .
  • the illumination means 9 is therefore positioned on one side of the sheet of yarn, and therefore of the mat 5, and the detection cell 10 is positioned on the other side.
  • the cooling unit 7 has a detection means for detecting the end of the sheet of son from which the recovery device 6 pulls the son, and thus check the presence of the recovery zone within of the recovery window.
  • the illumination means 9 is located in the box 8, under the carpet 5, the latter flowing in the upper part of said box 8.
  • the detection means is placed at least partly in the box 8.
  • the illumination means 9 takes the form of two elongate light sources 11, positioned to extend perpendicular to the axis of movement of the mat 5. Each of them is mounted adjustable on a cantilevered support in the box 8. This support has for this purpose two parallel grooves through which the light source can be slidably adjusted. The two light sources can thus be brought closer to or distant from one another, or else adjusted to ensure alignment with the detection cell 10. The distance of the light sources makes it possible to adjust the length of the light source. observation on the conveyor belt 5.
  • an angle of approximately 45 ° separates the axes connecting each light source 11 to the detection cell 10.
  • Each light source 11 advantageously has a set of baffles which prevents too wide a scattering of the light and each light source is oriented towards the detection cell 10.
  • the use of two light sources rather than just one allows to homogenize the luminous intensity along the recovery window, and thus to improve the quality of the detection of the edge of the lap or zone of recovery, at any point in the recovery window.
  • the detection cell 10 is, for its part, disposed above the conveyor belt, and at a distance such that it can monitor the entire recovery window 6, between the two limits, one upstream of the process. the other downstream, and over the entire width that can take the sheet, ideally over the entire width of the carpet 5.
  • the detection cell 10 is thus preferably on a support structure whose distance relative to the mat 5 is adjustable.
  • this support structure is in the form of two arches each placed against one side of the box 8, and fixed to it by means of lugs provided with screws provided for slide in an elongated groove provided on each of the two posts of the arch.
  • the detection cell 10 extends from the central part of the arch to the central part of the other arch, perpendicular to the direction of movement of the carpet 5. As shown in FIG. figure 2 the detection cell 10 is preferably mounted between two lateral extensions each extending from one of the two central portions.
  • the possibility of adjusting the position of the light sources and the detection cell 10 along the axis of movement of the belt 5, the distance of the detection cell 10 from the carpet 5, the angle light sources, ensures a light projection over the entire recovery window and the entire width of the carpet 5, thus promoting detection of the recovery zone.

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

Abstract

L'invention a pour objet un dispositif de traitement de fils comprenant une enceinte de thermofixation, fermée à chacune de ses extrémités par une tête d'étanchéité comprenant chacune deux rouleaux, un tapis transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte de thermofixation, un dispositif de reprise de fil, pour tirer les fils du tapis transporteur après thermofixation. Ce dispositif est caractérisé en ce qu'il comprend, en outre, une unité de refroidissement (7) de fil, fixe, agissant en aval de la thermofixation, et en ce que le dispositif de reprise ôte le fil du tapis transporteur au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement (7). L'invention peut aussi avoir pour objet une unité de refroidissement et une moyen de détection.The subject of the invention is a son treatment device comprising a heat-setting chamber, closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the threads are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure, a thread recovery device, for pulling the son of the conveyor belt after heat setting. This device is characterized in that it comprises, in addition, a fixed wire cooling unit (7) acting downstream of the heat-setting, and in that the recovery device removes the wire from the conveyor belt at the level of a recovery zone which is normally located in the cooling unit (7). The invention may also relate to a cooling unit and a detection means.

Description

La présente invention relève du domaine du traitement de fil synthétique, en particulier de celui des équipements utilisés dans les lignes complètes de mise en forme de fil synthétique.The present invention relates to the field of synthetic wire processing, in particular that of equipment used in the complete lines of shaping of synthetic thread.

Dans ce type d'équipements, les fils sont généralement déposés en nappe sur un tapis transporteur qui les amène dans une enceinte de thermofixation dans laquelle ils subissent un traitement thermique ayant pour effet de fixer leur forme, grâce à de la vapeur.In this type of equipment, the son are generally deposited in a sheet on a conveyor belt which brings them into a heat-setting chamber in which they undergo a heat treatment having the effect of setting their shape, thanks to steam.

Les fils déposés en nappe sur le tapis transporteur peuvent provenir directement des bobines d'alimentation, et être alors déposés sous forme de spires. Alternativement, en amont de cette enceinte de thermofixation, le fil synthétique peut passer par une étape de frisure, dans une boîte à friser. Les fils sont alors déposés en vrac sur le tapis transporteur. Une telle boîte à friser comprend classiquement une paire de rouleaux contrarotatifs, qui apportent sa frisure au fil.The son laid in a web on the conveyor belt can come directly from the feed coils, and then be deposited in the form of turns. Alternatively, upstream of this heat-setting chamber, the synthetic thread can pass through a crimping step in a curling box. The wires are then deposited in bulk on the conveyor belt. Such a curling box conventionally comprises a pair of counter-rotating rollers, which bring its curl to the thread.

Une unité de refroidissement est classiquement montée en aval de l'enceinte de thermofixation. Les fils sont finalement ôtés du tapis transporteur sous forme de toron par un dispositif de reprise de fil, puis stockés sur les bobines d'un râtelier.A cooling unit is conventionally mounted downstream of the heat-setting enclosure. The yarns are finally removed from the conveyor belt as a strand by a thread take-up device, and then stored on the reels of a rack.

Le dispositif de reprise de fil fonctionne généralement en tirant les fils vers le haut, les séparant ainsi du tapis transporteur, et il est particulièrement important de contrôler le lieu de la séparation des fils d'avec le tapis transporteur. La zone de reprise, c'est-à-dire l'endroit où les fils s'écartent du tapis transporteur et se séparent de la nappe, doit ainsi être surveillée en permanence et se trouver dans un endroit précis de la ligne, ou fenêtre de reprise, délimitée, du côté de l'enceinte de thermofixation, par une limite inférieure, et, du côté opposé, par une limite supérieure.The thread take-up device generally operates by pulling the threads up, thereby separating them from the conveyor belt, and it is particularly important to control where the threads are separated from the conveyor belt. The recovery zone, that is to say the place where the wires deviate from the conveyor belt and separate from the sheet, must thus be constantly monitored and be in a specific location of the line, or window of recovery, delimited, on the side of the heat-setting enclosure, by a lower limit, and, on the opposite side, by an upper limit.

La séparation des fils ayant pour effet de décomposer la nappe, des solutions optiques ont été développées pour détecter précisément la bordure de la nappe, et de surveiller ainsi la localisation exacte de la zone de reprise. Des solutions actuelles sont basées sur des photodiodes, et mesurent la quantité de lumière qui peut traverser le tapis transporteur dans la fenêtre de reprise. Si une grande quantité de lumière peut traverser la fenêtre de reprise, cela signifie que la zone de reprise est proche de la limite inférieure et donc que la reprise est trop rapide puisque les fils ne sont pas assez accumulés et la nappe est courte. Si une faible quantité de lumière peut traverser la fenêtre de reprise, cela signifie que la zone de reprise est proche de la limite supérieure et que la reprise n'est pas assez rapide puisque les fils forment une nappe très longue. La régulation de la vitesse de reprise, qui impacte la position de la zone de reprise dans la fenêtre de reprise, se fait donc sur la base de cette quantité de lumière.The separation of the wires having the effect of decomposing the sheet, optical solutions have been developed to accurately detect the edge of the sheet, and thus monitor the exact location of the recovery zone. Current solutions are based on photodiodes, and measure the amount of light that can pass through the conveyor belt into the recovery window. If a large amount of light can pass through the recovery window, this means that the recovery zone is close to the lower limit and therefore the recovery is too fast since the wires are not quite accumulated and the tablecloth is short. If a small amount of light can pass through the recovery window, this means that the recovery zone is close to the upper limit and recovery is not fast enough since the wires form a very long layer. The regulation of the recovery speed, which impacts the position of the recovery zone in the recovery window, is therefore based on this amount of light.

Néanmoins, dans certains cas, la bordure de la nappe peut ne pas être nette, en particulier compte tenu de la texture donnée préalablement aux fils, et cette détection peut alors être rendue plus difficile. La régulation conséquente est ainsi rendue moins fiable et précise. Une autre source de difficultés est une disposition irrégulière des fils au coeur de la nappe, pouvant mener à des trous et des amas de fils, rendant la mesure d'une intensité optique difficilement représentative de l'état de la nappe. En outre, le fait que les fils sont normalement libres sur le tapis transporteur rend le contrôle plus délicat. Enfin, la luminosité ambiante peut aussi avoir un impact sur la quantité de lumière reçue par la cellule de détection.Nevertheless, in some cases, the edge of the web may not be clear, especially given the texture given before the son, and this detection can then be made more difficult. The consequent regulation is thus made less reliable and precise. Another source of difficulties is an irregular arrangement of the threads in the heart of the web, which can lead to holes and clusters of threads, making the measurement of an optical intensity difficult to represent the state of the web. In addition, the fact that the wires are normally free on the conveyor belt makes the control more delicate. Finally, the ambient brightness may also have an impact on the amount of light received by the detection cell.

L'invention vise essentiellement à améliorer la reprise de fil, et notamment à mieux détecter la localisation de la zone de reprise. A cet effet, l'invention propose en particulier de disposer la zone de reprise dans l'unité fixe de refroidissement, où une circulation d'air permet souvent de maintenir les fils contre le tapis, qu'ils soient sous forme de nappe ou de toron, ou encore de modifier le principe de détection de la zone de reprise et d'en analyser plutôt la géométrie.The invention aims essentially to improve the recovery of wire, and in particular to better detect the location of the recovery zone. For this purpose, the invention proposes in particular to have the recovery zone in the fixed cooling unit, where a circulation of air can often keep the son against the carpet, whether in the form of a sheet or strand, or to modify the principle of detection of the zone of recovery and to analyze rather the geometry.

A cet effet, l'invention a pour objet un dispositif de traitement de fils comprenant une enceinte de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité comprenant chacune deux rouleaux, un tapis transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte de thermofixation, ainsi qu'un dispositif de reprise de fil, pour tirer les fils du tapis transporteur après thermofixation.For this purpose, the subject of the invention is a wire treatment device comprising a heat-setting enclosure, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the wires are deposited. , in bulk or in loops, in the form of a sheet and circulate in the heat-setting chamber, and a thread recovery device, for pulling the son of the conveyor belt after heat-fixing.

Ce dispositif est caractérisé en ce qu'il comprend, en outre, une unité de refroidissement de fil, fixe, agissant en aval de la thermofixation, et en ce que le dispositif de reprise ôte le fil du tapis transporteur au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement.This device is characterized in that it further comprises a fixed wire cooling unit acting downstream of the heat-setting, and in that the recovery device removes the conveyor belt wire at a zone recovery that is normally found in the cooling unit.

L'invention peut aussi avoir pour objet une unité de refroidissement de fil, pour dispositif de traitement de fils comprenant une enceinte de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité comprenant chacune deux rouleaux, un tapis transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte de thermofixation, ainsi qu'un dispositif de reprise de fil, pour tirer les fils du tapis transporteur après thermofixation au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement, ladite unité de refroidissement de fil étant destinée à un montage fixe en aval de la thermofixation.Another subject of the invention is a wire cooling unit, for a wire treatment device comprising a heat-setting chamber, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the son are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure, as well as a thread take-up device, for pulling the conveyor belt threads after heat setting at a recovery zone which is normally in the cooling unit, said wire cooling unit being intended for fixed mounting downstream of the heat setting.

Cette unité de refroidissement est caractérisée en ce qu'elle présente un moyen de détection pour détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise.This cooling unit is characterized in that it has a detection means for detecting the end of the sheet of yarns from which the recovery device pulls the threads, and thus check the presence of the recovery zone within of the recovery window.

L'invention peut encore avoir pour objet un moyen de détection, pour dispositif de traitement de fils comprenant une enceinte de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité comprenant chacune deux rouleaux, un tapis transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte de thermofixation, ainsi qu'un dispositif de reprise de fil, pour tirer les fils du tapis transporteur après thermofixation, ledit moyen de détection servant à détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise.Another subject of the invention is a detection means, for a son treatment device comprising a heat-setting enclosure, possibly closed at each of its ends by a sealing head each comprising two rollers, a conveyor belt, on which the son are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure, and a thread take-up device, for pulling the threads of the conveyor belt after heat-fixing, said detection means for detecting the end of the thread sheet from which the take-up device pulls the threads, and thus to check the presence of the pick-up area within the pickup window.

Ce moyen de détection est caractérisé en ce qu'il analyse la géométrie de la nappe dans la fenêtre de reprise.This detection means is characterized in that it analyzes the geometry of the sheet in the recovery window.

D'autres aspects de l'invention apparaîtront dans la description suivante, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels :

  • la figure 1 montre une ligne de traitement complète ;
  • la figure 2 illustre une unité de refroidissement comprenant un moyen de détection de la zone de reprise, et
  • la figure 3 illustre une réalisation particulière du moyen de détection de zone de reprise.
Other aspects of the invention will appear in the following description, which relates to a preferred embodiment, given by way of non-limiting example, and explained with reference to the appended diagrammatic drawings, in which:
  • the figure 1 shows a complete treatment line;
  • the figure 2 illustrates a cooling unit comprising means for detecting the area of recovery, and
  • the figure 3 illustrates a particular embodiment of the recovery zone detection means.

La ligne de traitement illustrée à la figure 1 montre ainsi un dispositif de traitement 1 de fils complet, comprenant une enceinte 3 de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité 4 comprenant chacune deux rouleaux, un tapis 5 transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte 3 de thermofixation, ainsi qu'un dispositif de reprise 6 de fil, pour tirer les fils du tapis 5 transporteur après thermofixation, en particulier pour les tirer sous forme de toron. Comme il sera décrit plus loin, le tapis 5 est préférentiellement tel que de l'air peut circuler à travers lui, voire aussi de la lumière et présente des ouvertures à cet effet.The treatment line illustrated in figure 1 thus shows a complete wire processing device 1, comprising a heat-setting enclosure 3, possibly closed at each of its ends by a sealing head 4 each comprising two rollers, a conveyor belt 5, on which the threads are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting chamber 3, and a device 6 thread recovery, for pulling the threads of the conveyor belt 5 after heat-setting, in particular for pulling them in the form of strand. As will be described later, the carpet 5 is preferably such that air can flow through it, or even light and has openings for this purpose.

Les fils subissent un traitement thermique dans l'enceinte 3 de thermofixation, grâce à de la vapeur qui y circule. L'enceinte 3 peut être sous forme d'un corps allongé ouvert à ses extrémités, ou présenter des têtes d'étanchéités à rouleaux.The son undergo a heat treatment in the enclosure 3 heat-setting, thanks to the steam that circulates there. The enclosure 3 may be in the form of an elongate body open at its ends, or have roll seal heads.

Le dispositif de traitement 1 comprend aussi un râtelier d'alimentation de fils en amont qui se présentent alors sous forme de bobines. Dans le cas illustré en figure 1, les fils passent ensuite par une boîte à friser 2 qui forme un moyen de texturation 2. Les fils sont pressés dans cette boîte à friser 2 grâce à deux rouleaux contrarotatifs, voire aussi grâce à un rouleau d'entrée disposé en amont desdits rouleaux de frisure parallèlement à eux et contre lequel circulent lesdits fils avant de passer entre les rouleaux. Ce moyen de texturation 2 n'est pas indispensable, et d'autres moyens de texturation, voire de microtexturation peuvent être prévus en complément ou en alternative.The processing device 1 also comprises an upstream wire feeding rack which are then in the form of coils. In the case illustrated in figure 1 the yarns then pass through a curling box 2 which forms a texturing means 2. The yarns are pressed into this curling box 2 by means of two counter-rotating rollers, or also by means of an inlet roll disposed upstream of said rollers of crimp parallel to them and against which circulate said son before passing between the rollers. This texturing means 2 is not essential, and other means of texturing, or even microtexturation may be provided in addition or alternatively.

Dans des modes de réalisation particuliers, le dispositif de traitement 1 comprend donc un moyen de texturation 2 de fil, en amont de l'enceinte 3 de thermofixation et sous forme d'une boîte à friser qui comprend une paire de rouleaux de frisure contrarotatifs.In particular embodiments, the processing device 1 thus comprises a wire texturing means 2, upstream of the heat-setting chamber 3 and in the form of a curling box which comprises a pair of counter-rotating crimping rollers.

Les fils sont ensuite déposés en nappe sur un tapis 5 transporteur pour circuler dans l'enceinte 3 de thermofixation, cette dernière étant fermée de façon étanche à ses extrémités par chaque fois une tête 4 d'étanchéité, présentant deux rouleaux contrarotatifs, entre lesquels circule ledit tapis 5.The yarns are then deposited in a sheet on a conveyor belt to circulate in the heat-setting chamber 3, the latter being sealed at its ends by each time a sealing head 4, having two counter-rotating rollers, between which circulates said carpet 5.

Après traitement, les fils sont dégagés sous forme de torons du tapis 5 par simple traction effectuée par le dispositif de reprise 6. Après le passage par le dispositif de reprise 6, les fils sont stockés sur des bobines, après un éventuel passage dans un accumulateur.After treatment, the son are released in the form of strands of the carpet 5 by simple traction performed by the recovery device 6. After passing through the recovery device 6, the son are stored on reels, after a possible passage through an accumulator .

Le dispositif de traitement 1 comprend, en outre, une unité de refroidissement 7 de fil, fixe, agissant en aval de la thermofixation, grâce à un flux d'air. Préférentiellement, l'unité de refroidissement 7 comprend une ventilation d'air qui a pour effet de plaquer les fils, en nappe ou en toron, contre le tapis 5 transporteur. A cet effet, l'unité de refroidissement 7 comprend un caisson 8 creux au dessus duquel circule le tapis 5 transporteur, la ventilation ayant pour effet d'en extraire de l'air. Cette unité de refroidissement 7 est donc destinée à un montage fixe en aval de la thermofixation.The processing device 1 further comprises a fixed wire cooling unit 7 acting downstream of the heat-setting, thanks to a flow of air. Preferably, the cooling unit 7 comprises an air ventilation which has the effect of pressing the son, in a sheet or strand, against the conveyor belt. For this purpose, the cooling unit 7 comprises a hollow box 8 above which circulates the conveyor belt 5, the ventilation having the effect of extracting air. This cooling unit 7 is therefore intended for fixed mounting downstream of the heat-setting.

Lors du transport sur le tapis 5, les fils sont disposés en nappe, reposant sur la surface du tapis 5. Le dispositif de reprise 6 tire les fils présents sur la surface du tapis 5, depuis un point décalé du plan dans lequel circule le tapis 5. Ainsi, les fils, sous forme de toron, s'éloigne du tapis 5 en direction de ce point de traction du dispositif de reprise 6, en quittant la surface du tapis 5 à un endroit du dispositif de traitement 1, nommé ici zone de reprise. Comme le fil, lorsqu'il est tiré par le dispositif de reprise 6, se présente encore sous forme de nappe occupant une certaine largeur sur le tapis 5, la zone de reprise s'étend elle aussi sur une partie de la largeur du tapis 5, notamment sur toute la largeur du tapis 5. Cette zone de reprise matérialise le front de la nappe à partir de laquelle les fils en sont retirés sous forme de toron.During transportation on the carpet 5, the son are arranged in a sheet, resting on the surface of the carpet 5. The recovery device 6 pulls the son present on the surface of the carpet 5, from a point offset from the plane in which the carpet travels. 5. Thus, the son, in the form of strand, moves away from the belt 5 towards this point of traction of the recovery device 6, leaving the surface of the belt 5 at a location of the treatment device 1, here named zone of recovery. Since the yarn, when pulled by the recovery device 6, is still in the form of a sheet occupying a certain width on the carpet 5, the recovery zone also extends over part of the width of the carpet 5 , especially over the entire width of the carpet 5. This recovery zone materializes the front of the web from which the son are removed in the form of strand.

Une bonne exécution du procédé de traitement nécessite que la zone de reprise, et donc le lieu où les fils s'éloignent de la nappe et se décalent du plan du tapis 5, se trouve entre deux limites fixes par rapport au dispositif de traitement 1. Une première limite se trouve vers l'amont des étapes de traitement du fil, à savoir en direction de l'enceinte 3 de thermofixation, et une deuxième se trouve vers l'aval des étapes de traitement du fil. Le dispositif de reprise 6 tire en effet les fils depuis la nappe à sa propre vitesse, et la nappe avance, quant à elle, grâce au tapis 5 qui peut donc avoir une vitesse indépendante de celle provoquée par le dispositif de reprise 6.A good execution of the treatment process requires that the recovery zone, and therefore the place where the threads move away from the web and offset from the plane of the belt 5, is between two fixed limits with respect to the processing device 1. A first limit is upstream of the wire processing steps, namely towards the heat-setting chamber 3, and a second is downstream of the wire processing steps. The recovery device 6 pulls the yarns from the web at its own speed, and the web advances, meanwhile, thanks to the belt 5 which can have a speed independent of that caused by the recovery device 6.

Une synchronisation exacte entre le dispositif de reprise 6 et l'avance de la nappe est délicat, et il est donc proposé d'assurer que le front de la nappe, c'est-à-dire la zone de reprise, reste bien entre les deux limites prédéfinies.An exact synchronization between the recovery device 6 and the advance of the sheet is delicate, and it is therefore proposed to ensure that the front of the sheet, that is to say the area of recovery, remains well between them. two predefined limits.

Si la zone de reprise s'approche de la limite en amont du procédé, la vitesse de la reprise est excessive par rapport au déplacement de la nappe. Il est donc nécessaire de ralentir la reprise pour éviter que le dispositif de reprise n'absorbe du fil trop en amont dans le procédé.If the area of recovery approaches the limit upstream of the process, the rate of recovery is excessive compared to the displacement of the web. It is therefore necessary to slow down the recovery to prevent the recovery device from absorbing too much upstream wire in the process.

Si la zone de reprise s'approche de la limite en aval du procédé, la vitesse de reprise n'est pas suffisante par rapport au déplacement de la nappe. Il est alors nécessaire d'accélérer la reprise pour éviter que la nappe atteigne un volume excessif par rapport à l'espace qui lui est dévolu à cet endroit sur le dispositif de traitement 1.If the recovery zone approaches the limit downstream of the process, the recovery rate is not sufficient compared to the movement of the web. It is then necessary to accelerate the recovery to prevent the sheet reaches an excessive volume relative to the space that is devolved thereon on the processing device 1.

Ainsi, la position de la zone de reprise entre ces deux limites, ainsi que son évolution entre elles au cours du procédé, permet de réguler la vitesse de reprise, pour s'assurer que la zone de reprise reste bien entre ces deux limites tout au long du fonctionnement. A cet effet, dans des modes de réalisation avantageux, le dispositif de reprise 6 de fil comprend un moyen de régulation qui tient compte de la position détectée de la nappe de fils, notamment dans l'unité de refroidissement 7, pour ajuster la vitesse avec laquelle le dispositif de reprise 6 tire le toron de la nappe.Thus, the position of the recovery zone between these two limits, as well as its evolution between them during the process, makes it possible to regulate the speed of recovery, to ensure that the zone of recovery remains well between these two limits all at the same time. long operation. For this purpose, in advantageous embodiments, the thread take-up device 6 comprises a regulation means which takes into account the detected position of the sheet of threads, in particular in the cooling unit 7, to adjust the speed with which the recovery device 6 pulls the strand of the sheet.

Il est donc utile que le dispositif de traitement 1 soit muni d'un moyen de détection de la position de la zone de reprise de fil entre des repères fixes. Préférentiellement, le moyen de détection analyse la géométrie de la nappe dans la fenêtre de reprise, entre la limite inférieure et la limite supérieure, sur la largeur du tapis 5.It is therefore useful for the processing device 1 to be provided with means for detecting the position of the thread recovery zone between fixed marks. Preferably, the detection means analyzes the geometry of the web in the recovery window, between the lower limit and the upper limit, over the width of the belt 5.

Les fils étant cependant positionnés sur le tapis 5 sous forme d'une nappe libre, son maintien et donc la position de la zone de reprise peuvent être difficiles à assurer. Il est donc avantageux de prévoir une zone de reprise à une étape du procédé où les fils peuvent être stabilisés sur le tapis 5. Il est ainsi préférable de prévoir une zone de reprise de fil dans l'unité de refroidissement 7.The son being however positioned on the belt 5 in the form of a free web, its maintenance and therefore the position of the recovery zone can be difficult to ensure. It is therefore advantageous to provide a recovery zone at a stage of the process where the wires can be stabilized on the belt 5. It is thus preferable to provide a wire recovery zone in the cooling unit 7.

En effet, dans cette unité, le tapis 5, sur lequel les fils sont alors disposés en nappe, circule dans un caisson 8 d'où l'air est aspiré, de sorte à créer une circulation d'air à travers le tapis 5 et autour des fils, pour refroidir ces derniers. Cette aspiration a donc pour effet d'exercer une force sur les fils de la nappe de sorte que ceux-ci sont pressés contre la surface du tapis 5 et sont ainsi stabilisés.Indeed, in this unit, the belt 5, on which the son are then arranged in a sheet, circulates in a box 8 from which the air is sucked, so as to create a flow of air through the carpet 5 and around the wires, to cool them. This suction has the effect of exerting a force on the son of the sheet so that they are pressed against the surface of the belt 5 and are thus stabilized.

Ainsi, le dispositif de reprise 6 ôte le fil du tapis 5 transporteur au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement 7, la fenêtre de reprise se trouvant ainsi dans ladite unité, de sorte que la fenêtre de reprise est prévue là où l'unité de refroidissement 7 plaque le fil contre le tapis 5 transporteur.Thus, the recovery device 6 removes the conveyor belt thread at a recovery zone which is normally located in the cooling unit 7, the recovery window being thus in said unit, so that the window recovery is provided where the cooling unit 7 plates the wire against the conveyor belt 5.

Comme le montre la figure 3, le caisson 8 présente une sortie latérale au niveau de laquelle est montée une hélice de ventilation, qui extraie l'air du caisson 8. Le tapis 5 transporteur circule à plat au dessus du caisson 8 et en forme ainsi la paroi supérieure. Les autres parois ne permettent pas une circulation d'air et c'est donc à travers le tapis 5 que l'air arrive dans le caisson 8 pour être ensuite expulsé par la sortie latérale. Le tapis 5 présente donc les perforations suffisantes par lesquelles l'air peut circuler, et il se trouve entre l'unité d'aspiration et la nappe de fils.As shown in figure 3 , the casing 8 has a lateral outlet at the level of which is mounted a ventilation propeller, which Extracts the air from the box 8. The conveyor belt 5 travels flat above the box 8 and thus forms the top wall. The other walls do not allow air circulation and it is through the carpet 5 that the air arrives in the box 8 to then be expelled by the side outlet. The belt 5 thus has sufficient perforations through which air can circulate, and it is between the suction unit and the sheet of son.

Le caisson 8 est monté sur un châssis présentant une paroi de base horizontale et quatre pieds qui s'étendent à partir de ladite paroi, le tapis 5 circulant sous cette paroi lors de son retour vers les phases amont du procédé.The box 8 is mounted on a frame having a horizontal base wall and four legs extending from said wall, the belt 5 flowing under this wall on its return to the upstream phases of the process.

En prévoyant une fenêtre de reprise au niveau de l'unité de refroidissement 7 fixe, et donc réutilisant cette dernière pour assurer la tenue de la nappe de fils lors de la reprise, on évite ainsi de rajouter des éléments supplémentaires dans le dispositif de traitement 1, et il est aussi possible d'éviter d'exercer des efforts mécaniques excessifs sur les fils, qui pourraient avoir des effets sur leur forme ou gêner la reprise. L'aspiration d'air à travers le tapis 5 transporteur permet de créer une force homogène sur la nappe de fil et de la maintenir suffisamment, sans pour autant nécessiter des efforts excessifs pour le dispositif de reprise 6.By providing a recovery window at the fixed cooling unit 7, and thus reusing the latter to ensure the holding of the son sheet during the recovery, it thus avoids adding additional elements in the processing device 1 and it is also possible to avoid exerting excessive mechanical stresses on the threads, which could have effects on their shape or hinder the recovery. The suction of air through the conveyor belt 5 makes it possible to create a homogeneous force on the sheet of yarn and to hold it sufficiently, without requiring excessive forces for the recovery device 6.

De façon générale, et donc que la fenêtre de reprise se situe dans l'unité de refroidissement 7 comme il vient d'être décrit ou qu'elle se situe ailleurs au cours du cheminement de la nappe sur le tapis 5 transporteur, le dispositif de traitement 1 présente avantageusement un moyen de détection de la zone de reprise, c'est-à-dire un moyen de détection de la bordure de la nappe où les fils en sont séparés en toron, dans le but de fournir un signal utile à une boucle de régulation qui pilote le dispositif de reprise 6, pour que la zone de reprise se situe dans la fenêtre de reprise prédéfinie, entre les deux limites déjà évoquées.In general, and therefore the recovery window is located in the cooling unit 7 as just described or it is located elsewhere during the course of the web on the conveyor belt, the device of 1 advantageously has a means of detecting the recovery zone, that is to say a means for detecting the edge of the web where the son are separated in strand, in order to provide a signal useful to a control loop that drives the recovery device 6, so that the recovery zone is in the predefined recovery window, between the two limits already mentioned.

Afin de détecter de façon fiable la position de la zone de reprise, et donc de ne pas être gêné par les irrégularités locales que peut présenter la nappe, telles que des trous ou des accumulations, le moyen de détection opère avantageusement par une observation de la forme géométrique que prennent les fils dans la fenêtre de reprise, et analyse cette forme pour y identifier le front de la nappe, et donc le départ des torons, c'est-à-dire pour y identifier une zone de reprise.In order to reliably detect the position of the recovery zone, and thus not to be hampered by local irregularities that may present the web, such as holes or accumulations, the detection means advantageously operates by an observation of the geometrical form that takes the son in the window of recovery, and analyzes this form to identify the front of the sheet, and thus the departure of the strands, that is to say to identify a recovery zone.

Le moyen de détection identifie donc les contours de la nappe et un calculateur effectue le calcul nécessaire pour y identifier la zone de reprise, puisqu'il s'agit de la zone à partir de laquelle la nappe se décompose en torons, ce qui peut être observé visuellement. Il détecte donc géométriquement le profil que présente l'ensemble des fils disposé sur le tapis 5. A cet effet, de façon générale, le moyen de détection comprend, d'une part, un moyen d'éclairement 9, placé d'un côté du tapis 5 transporteur, et, d'autre part, une cellule de détection 10 optique, placée de l'autre côté du tapis 5 transporteur, et préférentiellement aussi un calculateur pour mettre en oeuvre un procédé d'analyse géométrique de la nappe dans la fenêtre de reprise.The detection means therefore identifies the contours of the sheet and a calculator performs the calculation necessary to identify the area of the sheet. recovery, since it is the area from which the sheet breaks down into strands, which can be observed visually. It thus geometrically detects the profile presented by all the son disposed on the carpet 5. For this purpose, in general, the detection means comprises, on the one hand, an illumination means 9, placed on one side of the conveyor belt 5, and on the other hand, an optical detection cell 10 placed on the other side of the conveyor belt, and preferably also a computer for implementing a method of geometric analysis of the web in the recovery window.

Le moyen de détection comprend ainsi une cellule de détection 10, qui visualise les fils tels qu'ils sont disposés sur le tapis 5. Afin de favoriser la détection optique des contours de l'amas de fil sur le tapis 5, il est préférable d'associer un moyen d'éclairement 9 à la cellule de détection 10. Le moyen d'éclairement 9 projette donc de la lumière en direction de la cellule de détection 10, le tapis 5 transporteur étant situé entre le moyen d'éclairement 9 et ladite cellule de détection 10. Le tapis 5 transporteur présente des ouvertures qui permettent de laisser passer la lumière en quantité suffisante pour qu'elle ne soit stoppée essentiellement que par les fils sur le tapis 5.The detection means thus comprises a detection cell 10, which displays the wires as they are arranged on the carpet 5. In order to promote the optical detection of the contours of the pile of yarn on the carpet 5, it is preferable to associating illumination means 9 with the detection cell 10. The illumination means 9 therefore project light towards the detection cell 10, the conveyor belt being situated between the illumination means 9 and said detection cell 10. The conveyor belt 5 has openings which allow enough light to pass through so that it is essentially stopped only by the threads on the carpet 5.

Les fils disposés en nappe obstruent de façon significative la circulation de la lumière, alors que les fils sous forme de toron, éloignés les uns des autres, laissent plus facilement circuler la lumière. La cellule de détection 10 peut donc différencier les fils sous forme de nappe, caractérisée par une très faible intensité lumineuse, des fils sous forme de torons tirés par le dispositif de reprise 6, caractérisés par une intensité lumineuse plus élevée. La pleine puissance lumineuse correspond bien entendu à une fenêtre de reprise dépourvue de fils.The wires arranged in a sheet significantly obstruct the flow of light, while the son in the form of strand, distant from each other, more easily circulate light. The detection cell 10 can therefore differentiate the son in the form of a sheet, characterized by a very low light intensity, the son in the form of strands pulled by the recovery device 6, characterized by a higher light intensity. The full luminous power corresponds, of course, to a recovery window devoid of wires.

La cellule de détection 10 est normalement apte à observer la localisation des fils sur le tapis 5 transporteur, entre les deux limites précédemment évoquées. Dans des modes de réalisation particuliers, la cellule de détection 10 comprend une caméra. La cellule de détection 10 peut ainsi prendre la forme d'une caméra ou encore d'un capteur de vision, qui envoie un signal à un calculateur qui analyse la géométrie relevée pour y identifier la zone de reprise.The detection cell 10 is normally able to observe the location of the wires on the conveyor belt between the two previously mentioned boundaries. In particular embodiments, the detection cell 10 comprises a camera. The detection cell 10 can thus take the form of a camera or a vision sensor, which sends a signal to a computer that analyzes the geometry identified to identify the area of recovery.

Le moyen d'éclairement 9 peut lui aussi prendre différentes formes. Ainsi, dans des modes de réalisation particuliers, le moyen d'éclairement 9 prend la forme d'au moins une source lumineuse allongée 11 s'étendant sensiblement dans la direction de déplacement du tapis 5 transporteur. Dans d'autres modes de réalisation, le moyen d'éclairement 9 prend la forme d'au moins une source lumineuse allongée 11, s'étendant sensiblement parallèlement au tapis transporteur, transversalement à sa direction de déplacement. Plus précisément, dans certains modes de réalisation, le moyen d'éclairement 9 prend la forme d'une paire de sources lumineuses allongées 11, chacune orientée vers la cellule de détection 10 optique, disposées perpendiculairement à la direction de déplacement du tapis 5, parallèlement au tapis 5.The illumination means 9 can also take different forms. Thus, in particular embodiments, the illumination means 9 takes the form of at least one elongate light source 11 extending substantially in the direction of travel of the conveyor belt. In other embodiments, the illumination means 9 takes the form of at least one elongated light source 11, extending substantially parallel to the conveyor belt, transversely to its direction of travel. More specifically, in some embodiments, the illumination means 9 takes the form of a pair of elongated light sources 11, each oriented towards the optical detection cell 10, arranged perpendicular to the direction of movement of the belt 5, in parallel on the carpet 5.

De façon générale, la au moins une source lumineuse 11 peut prendre la forme d'un tube néon ou une série de diodes électroluminescentes.In general, the at least one light source 11 may take the form of a neon tube or a series of light-emitting diodes.

Dans des réalisations non illustrées aux figures annexées, le moyen d'éclairement 9 comprend deux sources lumineuses allongées 11 placées sous le tapis 5 transporteur, l'une étant disposée dans le caisson 8, et l'autre à l'extérieur. Elles sont donc séparées par une paroi du caisson 8, et globalement localisées là où le tapis 5 quitte le caisson 8, de sorte que le maintien exercé sur les fils lors du refroidissement est maximum. Le moyen de détection est donc globalement placé à la sortie du caisson 8, et la cellule de détection 10 se trouve donc au dessus du tapis, au niveau de la zone à partir de laquelle il quitte le caisson 8.In embodiments not illustrated in the appended figures, the illumination means 9 comprises two elongated light sources 11 placed under the conveyor belt, one being disposed in the box 8, and the other outside. They are therefore separated by a wall of the box 8, and generally located where the mat 5 leaves the box 8, so that the maintenance exerted on the son during cooling is maximum. The detection means is therefore generally placed at the outlet of the box 8, and the detection cell 10 is thus above the belt, at the level of the zone from which it leaves the box 8.

Dans des modes de réalisation particuliers, le moyen d'éclairement 9 prend la forme d'une dalle, s'étendant sensiblement parallèlement au tapis 5 transporteur. Une telle dalle lumineuse s'étend donc à la fois dans la direction de déplacement du tapis 5 et perpendiculairement à elle.In particular embodiments, the illuminating means 9 takes the form of a slab, extending substantially parallel to the conveyor belt. Such a light slab extends both in the direction of movement of the belt 5 and perpendicular to it.

De façon générale, le moyen d'éclairement 9 est donc capable d'envoyer suffisamment de puissance lumineuse à travers toute la fenêtre de reprise pour permettre une détection par la cellule de détection 10 dans le cas où le fil n'en obstrue pas la circulation.In general, the illumination means 9 is therefore capable of sending enough light power through the entire recovery window to allow detection by the detection cell 10 in the case where the wire does not obstruct the circulation. .

Le moyen d'éclairement 9 est donc positionné d'un côté de la nappe de fil, et donc du tapis 5, et la cellule de détection 10 est positionnée de l'autre côté.The illumination means 9 is therefore positioned on one side of the sheet of yarn, and therefore of the mat 5, and the detection cell 10 is positioned on the other side.

Dans les cas particuliers où le moyen de détection de la zone de reprise est monté dans l'unité de refroidissement 7, et donc que la fenêtre de reprise est positionnée à l'endroit où une ventilation d'aspiration plaque les fils contre le tapis 5 transporteur, le moyen d'éclairement 9 est placé dans le caisson 8, la cellule de détection 10 étant placée à l'extérieur du caisson 8, en vis-à-vis. Dans ces cas, l'unité de refroidissement 7 présente un moyen de détection pour détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise 6 tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise.In special cases where the recovery zone detection means is mounted in the cooling unit 7, and therefore the recovery window is positioned where suction ventilation plates the wires against the carpet 5 carrier, the illumination means 9 is placed in the box 8, the detection cell 10 being placed outside the box 8, vis-à-vis. In these cases, the cooling unit 7 has a detection means for detecting the end of the sheet of son from which the recovery device 6 pulls the son, and thus check the presence of the recovery zone within of the recovery window.

Dans la réalisation illustrée en figure 3, le moyen d'éclairement 9 se situe dans le caisson 8, sous le tapis 5, ce dernier circulant dans la partie supérieure dudit caisson 8. De façon générale, le moyen de détection est placé au moins en partie dans le caisson 8. Dans cette figure, le moyen d'éclairement 9 prend la forme de deux sources de lumières 11 allongées, positionnées pour s'étendre perpendiculairement à l'axe de déplacement du tapis 5. Chacune d'elle est montée réglable sur un support en porte à faux dans le caisson 8. Ce support présente à cet effet deux rainures parallèles grâce auxquelles la source de lumière peut être réglée en coulissement. Les deux sources de lumière peuvent ainsi être rapprochées ou éloignées l'une de l'autre, ou encore réglées pour assurer l'alignement avec la cellule de détection 10. L'éloignement des sources de lumière permet de régler la longueur de la zone d'observation sur le tapis 5 transporteur.In the embodiment illustrated in figure 3 , the illumination means 9 is located in the box 8, under the carpet 5, the latter flowing in the upper part of said box 8. In general, the detection means is placed at least partly in the box 8. In this figure, the illumination means 9 takes the form of two elongate light sources 11, positioned to extend perpendicular to the axis of movement of the mat 5. Each of them is mounted adjustable on a cantilevered support in the box 8. This support has for this purpose two parallel grooves through which the light source can be slidably adjusted. The two light sources can thus be brought closer to or distant from one another, or else adjusted to ensure alignment with the detection cell 10. The distance of the light sources makes it possible to adjust the length of the light source. observation on the conveyor belt 5.

Dans la figure 3, un angle d'environ par exemple 45° sépare les axes reliant chaque source lumineuse 11 à la cellule de détection 10.In the figure 3 an angle of approximately 45 °, for example, separates the axes connecting each light source 11 to the detection cell 10.

Chaque source de lumière 11 présente avantageusement un jeu de déflecteurs qui évite une diffusion trop large de la lumière et chaque source de lumière est orientée en direction de la cellule de détection 10. Le recours à deux sources de lumière plutôt qu'à une seule permet d'homogénéiser l'intensité lumineuse le long de la fenêtre de reprise, et d'améliorer ainsi la qualité de la détection de la bordure de la nappe ou zone de reprise, à n'importe quelle endroit dans la fenêtre de reprise.Each light source 11 advantageously has a set of baffles which prevents too wide a scattering of the light and each light source is oriented towards the detection cell 10. The use of two light sources rather than just one allows to homogenize the luminous intensity along the recovery window, and thus to improve the quality of the detection of the edge of the lap or zone of recovery, at any point in the recovery window.

La cellule de détection 10 est, quant à elle, disposée au dessus du tapis 5 transporteur, et à une distance telle qu'elle peut surveiller toute la fenêtre de reprise 6, entre les deux limites, l'une en amont du procédé, l'autre en aval, et sur toute la largeur que peut prendre la nappe, idéalement sur toute la largeur du tapis 5. La cellule de détection 10 se trouve ainsi préférentiellement sur une structure support dont l'éloignement par rapport au tapis 5 est réglable.The detection cell 10 is, for its part, disposed above the conveyor belt, and at a distance such that it can monitor the entire recovery window 6, between the two limits, one upstream of the process. the other downstream, and over the entire width that can take the sheet, ideally over the entire width of the carpet 5. The detection cell 10 is thus preferably on a support structure whose distance relative to the mat 5 is adjustable.

Dans la réalisation illustrée figure 2, cette structure support se présente sous la forme de deux arches placées chacune contre un côté du caisson 8, et fixées à lui grâce à des pattes munies de vis prévues pour coulisser dans une rainure allongée prévue sur chacun des deux montants de l'arche. La cellule de détection 10 s'étend de la partie centrale de l'arche à la partie centrale de l'autre arche, perpendiculairement à la direction de déplacement du tapis 5. Comme le montre la figure 2, la cellule de détection 10 est préférentiellement montée entre deux extensions latérales s'étendant chacune à partir de l'une des deux parties centrales.In the illustrated realization figure 2 , this support structure is in the form of two arches each placed against one side of the box 8, and fixed to it by means of lugs provided with screws provided for slide in an elongated groove provided on each of the two posts of the arch. The detection cell 10 extends from the central part of the arch to the central part of the other arch, perpendicular to the direction of movement of the carpet 5. As shown in FIG. figure 2 the detection cell 10 is preferably mounted between two lateral extensions each extending from one of the two central portions.

La possibilité de réglage de la position des sources de lumière et de la cellule de détection 10 le long de l'axe de déplacement du tapis 5, de l'éloignement de la cellule de détection 10 par rapport au tapis 5, de l'angle des sources lumineuses, permet d'assurer une projection de lumière sur toute la fenêtre de reprise et toute la largeur du tapis 5, favorisant ainsi une détection de la zone de reprise.The possibility of adjusting the position of the light sources and the detection cell 10 along the axis of movement of the belt 5, the distance of the detection cell 10 from the carpet 5, the angle light sources, ensures a light projection over the entire recovery window and the entire width of the carpet 5, thus promoting detection of the recovery zone.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments, par combinaison différente de tout ou partie des caractéristiques décrites ci-dessus, ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications are possible, in particular from the point of view of the constitution of the various elements, by different combination of all or part of the characteristics described above, or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (15)

Dispositif de traitement (1) de fils comprenant une enceinte (3) de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité (4) comprenant chacune deux rouleaux, un tapis (5) transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte (3) de thermofixation, ainsi qu'un dispositif de reprise (6) de fil, pour tirer les fils du tapis (5) transporteur après thermofixation,
caractérisé en ce que
le dispositif de traitement (1) de fil comprend, en outre, une unité de refroidissement (7) de fil, fixe, agissant en aval de la thermofixation, et en ce que
le dispositif de reprise (6) ôte le fil du tapis (5) transporteur au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement (7).Device for treating (1) wires comprising a heat-setting enclosure (3), optionally closed at each of its ends by a sealing head (4) each comprising two rollers, a conveyor belt (5), on which the wires are deposited in bulk or in loops, in the form of a sheet and circulate in the enclosure (3) of heat-setting, and a device for taking up (6) wire to pull the threads of the conveyor belt (5) after heat setting,
characterized in that
the wire processing device (1) further comprises a fixed wire cooling unit (7) acting downstream of the heat setting, and in that
the recovery device (6) removes the conveyor belt (5) conveyor at a recovery zone which is normally located in the cooling unit (7). Dispositif de traitement (1) de fil selon la revendication 1, caractérisé en ce que
l'unité de refroidissement (7) comprend une ventilation d'air qui a pour effet de plaquer les fils, en nappe ou en toron, contre le tapis (5) transporteur, et la fenêtre de reprise est prévue là où l'unité de refroidissement (7) plaque le fil contre le tapis (5) transporteur.Wire treatment device (1) according to claim 1, characterized in that
the cooling unit (7) comprises an air ventilation which has the effect of pressing the son, in sheets or in strand, against the conveyor belt (5), and the recovery window is provided where the unit of cooling (7) plates the wire against the conveyor belt (5). Dispositif de traitement (1) de fil selon l'une quelconque des revendications 1 à 2, caractérisé en ce que
l'unité de refroidissement (7) comprend un caisson (8) creux au dessus duquel circule le tapis (5) transporteur, la ventilation ayant pour effet d'en extraire de l'air.Wire treatment device (1) according to one of Claims 1 to 2, characterized in that
the cooling unit (7) comprises a hollow box (8) above which the conveyor belt (5) circulates, the ventilation having the effect of extracting air therefrom. Dispositif de traitement (1) de fil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que
l'unité de refroidissement (7) présente un moyen de détection pour détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise (6) tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise.Wire treatment device (1) according to one of Claims 1 to 3, characterized in that
the cooling unit (7) has a detecting means for detecting the end of the sheet of yarns from which the take-up device (6) pulls the yarns, and thus check the presence of the recovery zone within of the recovery window. Dispositif de traitement (1) de fil selon la revendication 3 et selon la revendication 4, caractérisé en ce que
le moyen de détection est placé au moins en partie dans le caisson (8).Wire treatment device (1) according to claim 3 and according to claim 4, characterized in that
the detection means is placed at least partly in the box (8). Dispositif de traitement (1) de fil selon la revendication 4 ou 5, caractérisé en ce que
le moyen de détection analyse la géométrie de la nappe dans la fenêtre de reprise.Wire treatment device (1) according to claim 4 or 5, characterized in that
the detection means analyzes the geometry of the web in the recovery window. Dispositif de traitement (1) de fil selon la revendication 6, caractérisé en ce que
le moyen de détection comprend, d'une part, un moyen d'éclairement (9), placé d'un côté du tapis (5) transporteur, et, d'autre part, une cellule de détection (10) optique, placée de l'autre côté du tapis (5) transporteur.Wire treatment device (1) according to claim 6, characterized in that
the detection means comprises, on the one hand, illumination means (9), placed on one side of the conveyor belt (5), and on the other hand, an optical detection cell (10) placed the other side of the conveyor belt (5). Dispositif de traitement (1) de fil selon la revendication 7, caractérisé en ce que
la cellule de détection (10) comprend une caméra.Wire treatment device (1) according to claim 7, characterized in that
the detection cell (10) comprises a camera. Dispositif de traitement (1) de fil selon l'une quelconque des revendications 7 à 8, caractérisé en ce que
le moyen d'éclairement (9) prend la forme d'une dalle, s'étendant sensiblement parallèlement au tapis (5) transporteur.Wire treatment device (1) according to one of Claims 7 to 8, characterized in that
the illuminating means (9) takes the form of a slab, extending substantially parallel to the conveyor belt (5). Dispositif de traitement (1) de fil selon l'une quelconque des revendications 7 à 8, caractérisé en ce que
le moyen d'éclairement (9) prend la forme d'au moins une source lumineuse allongée (11) s'étendant sensiblement dans la direction de déplacement du tapis (5) transporteur.Wire treatment device (1) according to one of Claims 7 to 8, characterized in that
the illumination means (9) takes the form of at least one elongated light source (11) extending substantially in the direction of movement of the conveyor belt (5). Dispositif de traitement (1) de fil selon l'une quelconque des revendications 7 à 8, caractérisé en ce que
le moyen d'éclairement (9) prend la forme d'au moins une source lumineuse allongée (11), s'étendant sensiblement parallèlement au tapis transporteur, transversalement à sa direction de déplacement.Wire treatment device (1) according to one of Claims 7 to 8, characterized in that
the illumination means (9) takes the form of at least one elongate light source (11), extending substantially parallel to the conveyor belt, transversely to its direction of travel. Dispositif de traitement (1) de fil selon la revendication 11, caractérisé en ce que
le moyen d'éclairement (9) prend la forme d'une paire de sources lumineuses allongées (11), chacune orientée vers la cellule de détection (10) optique.Wire treatment device (1) according to claim 11, characterized in that
the illumination means (9) takes the form of a pair of elongated light sources (11), each oriented towards the optical detection cell (10). Dispositif de traitement (1) de fil selon l'une quelconque des revendications 1 à 12, caractérisé en ce que
le dispositif de reprise (6) de fil comprend un moyen de régulation qui tient compte de la position détectée de la nappe de fils, notamment dans l'unité de refroidissement (7), pour ajuster la vitesse avec laquelle le dispositif de reprise (6) tire le toron de la nappe.Wire treatment device (1) according to one of Claims 1 to 12, characterized in that
the thread take-up device (6) comprises a regulating means which takes into account the detected position of the ply of threads, in particular in the cooling unit (7), to adjust the speed with which the take-up device (6) ) pulls the strand from the tablecloth. Unité de refroidissement (7) de fil, pour dispositif de traitement (1) de fils comprenant une enceinte (3) de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité (4) comprenant chacune deux rouleaux, un tapis (5) transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte (3) de thermofixation, ainsi qu'un dispositif de reprise (6) de fil, pour tirer les fils du tapis (5) transporteur après thermofixation au niveau d'une zone de reprise qui se trouve normalement dans l'unité de refroidissement (7),
ladite unité de refroidissement (7) de fil étant destinée à un montage fixe en aval de la thermofixation,
caractérisée en ce que
elle présente un moyen de détection pour détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise (6) tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise.A wire cooling unit (7) for a wire processing device (1) comprising a heat-setting enclosure (3), optionally closed at each of its ends by a sealing head (4) each comprising two rollers, a belt (5) conveyor, on which the yarns are deposited, in bulk or in loops, in the form of a sheet and circulate in the heat-setting enclosure (3), as well as a device for taking up (6) yarn, for pulling the conveyor belt threads (5) after heat setting at a recovery zone which is normally in the cooling unit (7),
said wire cooling unit (7) being intended for fixed mounting downstream of the heat-setting,
characterized in that
it has detection means for detecting the end of the sheet of threads from which the pickup device (6) pulls the threads, and thus check the presence of the pickup area within the pickup window. Moyen de détection, pour dispositif de traitement (1) de fils comprenant une enceinte (3) de thermofixation, éventuellement fermée à chacune de ses extrémités par une tête d'étanchéité (4) comprenant chacune deux rouleaux, un tapis (5) transporteur, sur lequel les fils sont déposés, en vrac ou en boucles, sous la forme d'une nappe et circulent dans l'enceinte (3) de thermofixation, ainsi qu'un dispositif de reprise (6) de fil, pour tirer les fils du tapis (5) transporteur après thermofixation, ledit moyen de détection servant à détecter l'extrémité de la nappe de fils à partir de laquelle le dispositif de reprise (6) tire les fils, et ainsi vérifier la présence de la zone de reprise au sein de la fenêtre de reprise, caractérisé en ce que
le moyen de détection analyse la géométrie de la nappe dans la fenêtre de reprise.Detection means, for a wire treatment device (1) comprising a heat-setting enclosure (3), optionally closed at each of its ends by a sealing head (4) each comprising two rollers, a conveyor belt (5), on which the wires are deposited, in bulk or in loops, in the form of a sheet and circulate in the enclosure (3) of heat-setting, and a device for taking up (6) wire, to pull the wires of the carpet (5) conveyor after heat setting, said detecting means for detecting the end of the sheet of yarns from which the recovery device (6) pulls the yarns, and thus checking the presence of the recovery zone within of the recovery window, characterized in that
the detection means analyzes the geometry of the web in the recovery window.
EP20130306484 2013-10-30 2013-10-30 Thread take-up in a device for treating synthetic thread Withdrawn EP2868791A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20130306484 EP2868791A1 (en) 2013-10-30 2013-10-30 Thread take-up in a device for treating synthetic thread
TR2014/00282A TR201400282A2 (en) 2013-10-30 2014-01-10 Thread retention in a synthetic yarn treatment device.

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Application Number Priority Date Filing Date Title
EP20130306484 EP2868791A1 (en) 2013-10-30 2013-10-30 Thread take-up in a device for treating synthetic thread

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