EP0349563B1 - Process and installation for heat treatment of textile threads - Google Patents

Process and installation for heat treatment of textile threads Download PDF

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Publication number
EP0349563B1
EP0349563B1 EP88902493A EP88902493A EP0349563B1 EP 0349563 B1 EP0349563 B1 EP 0349563B1 EP 88902493 A EP88902493 A EP 88902493A EP 88902493 A EP88902493 A EP 88902493A EP 0349563 B1 EP0349563 B1 EP 0349563B1
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EP
European Patent Office
Prior art keywords
chamber
air
upstream
steam
temperature
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EP88902493A
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German (de)
French (fr)
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EP0349563A1 (en
Inventor
Robert Enderlin
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Superba SAS
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Superba SAS
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/006—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a fluid bed
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel
    • 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
    • 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
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/14—Containers, e.g. vats
    • D06B23/16—Containers, e.g. vats with means for introducing or removing textile materials without modifying container pressure

Definitions

  • the present invention relates to a continuous heat treatment process for textile yarns and in particular for heat-setting these yarns, in which the yarns, previously deposited on a conveyor belt, are passed through an installation comprising several consecutive chambers adjoining the to each other including at least one vaporization chamber.
  • It also relates to an installation for heat treatment of continuous textile yarns, in particular for thermofixing these yarns, comprising several consecutive chambers adjacent to each other, therefore at least one vaporization chamber and at least one conveyor belt on which these son and whose course crosses said chambers.
  • the upstream cold room is relatively short and in principle has no particular function in the wire treatment process, except to prevent, as far as possible, steam leakage, thanks to the ambient overpressure.
  • the average length of the upstream cold room is currently around 0.5 meters.
  • the downstream chamber currently has a length of 2 meters since it plays an additional role compared to that of the upstream chamber, namely that of ensuring pre-cooling of the wires at the outlet of the vaporization enclosure.
  • the evolution of the temperature in such a known installation is illustrated by FIG. 7 which will be described in detail below.
  • the present invention proposes to overcome this drawback by providing various known installations to the known installations in order to avoid that different thermal shocks, undergone respectively during continuous operation and when the conveyor belt is stopped, are at the origin of apparent defects on products manufactured using wires treated by the thermofixation installation.
  • the method according to the invention is characterized in that a gradual increase in the temperature of the wires is brought upstream and / or downstream of the inlet of the vaporization chamber, so as to reduce the shock thermal undergone by the wires entering this room.
  • a positive temperature gradient is produced in the direction of movement of the conveyor belt, in an upstream cold room adjacent to the inlet of the vaporization chamber.
  • the upstream cold room is subdivided into several compartments successively crossed by the wires and different temperature conditions are maintained in these different compartments.
  • a positive temperature gradient is produced inside the vaporization chamber in the direction of movement of the conveyor belt.
  • a determined temperature gradient is imposed along at least part of the course of the carpet in now, in several consecutive chambers or in consecutive compartments formed in one or more chambers, respective temperatures which are different and gradually staggered.
  • This air taken from the upper downstream zone is preferably heated or cooled by an external source before being reinjected at the bottom of the upstream part of the compartment concerned.
  • the air is heated by a supply of steam or cooled by a supply of fresh air.
  • the installation according to the invention is characterized in that it comprises means for creating a gradual increase in the temperature of the wires upstream and / or downstream of the inlet of the vaporization chamber, so as to reduce the shock thermal undergone by the wires entering this room.
  • the upstream cold room has a length at least equal to that of the downstream cold room.
  • This upstream cold room advantageously comprises at least two partitioned compartments and the last compartment, in the direction of circulation of the conveyor belt, is preferably equipped with means for raising the temperature of the ambient air to a value higher than that of the other compartments.
  • the means for raising the temperature in the latter compartment may advantageously include a suction member for sucking air at the top of the downstream part of this compartment and for discharging it at the bottom of its upstream part, as well as a body of agency heater to raise the temperature of this air before re-injecting it into the compartment.
  • the means for heating the air advantageously comprise at least one electric resistance heater disposed in said closed circuit.
  • the upstream cold room contains a steam generator device located outside of said boxes, which have steam inlet orifices.
  • the vaporization chamber comprises in the area near its entrance a tunnel arranged on the trajectory of the conveyor belt, this tunnel comprising walls designed to constitute a heat shield for the transported wire.
  • Said means for creating a temperature gradient in the vaporization chamber advantageously comprise a suction member for withdrawing steam at the top of the downstream part of this chamber and for reinjecting it at the bottom of a central zone, and a body of heater arranged to raise the temperature of this vapor before its reinjection into this chamber.
  • the installation preferably comprises a first duct arranged to connect these two rooms together, this duct being connected to a second supply duct connected to a source of air under pressure, said second conduit being equipped with a valve controlled by a first regulator connected at least to two temperature probes disposed respectively in the two intermediate chambers, and to a pressure probe arranged in the vaporization chamber.
  • the first conduit preferably opens into the upstream cold room inside the compartment located most upstream.
  • the vaporization chamber advantageously contains a temperature probe connected to a second regulator arranged to control a valve mounted on the water vapor supply duct of this vaporization chamber, and said first and second regulators are preferably coupled together .
  • an installation according to the invention comprises a modular series of consecutive units each comprising a chamber provided with stirring means for circulating air and / or steam in the chamber, and means to maintain a certain temperature in the room.
  • this installation comprises a centralized control, arranged to control all of the stirring means and of the adjustment means, and at least one of said units is arranged to contain steam under pressure.
  • the installation shown comprises a vaporization chamber 10, an upstream cold chamber 11, a chamber downstream cold 12 and two intermediate chambers 13 and 14.
  • a conveyor belt 15 successively passes through the upstream cold chamber 11, the intermediate chamber 13, the vaporization chamber 10, the intermediate chamber 14 and the cold chamber downstream 12 and transports one or more wires 16 wound in superimposed turns or in a rod to ensure the heat fixing of the wires.
  • the vaporization chamber is associated with a steam generator 17 which may consist of a heating coil 18 conveying steam and housed inside a tank 19 filled with water, or a perforated tube 20 which releases steam jets 21 inside the chamber or, as shown in FIG. 1, a combination of these two means.
  • a supply pipe 22 common to these two circuits, which can be used separately thanks to two valves 23 and 24, is equipped with a valve 25 controlled by a regulator 26 to which is connected a probe 27 for measuring the temperature of the vapor contained inside the vaporization chamber 10.
  • the latter is equipped with an outlet duct 28 arranged at the top of the enclosure 10 and connected to a suction member 29 which is arranged to discharge the vapor taken from a conduit 30 to direct it towards a box 31, perforated on its upper surface, and placed under the conveyor belt 15, itself perforated to allow forced passage of the vapor through the turns of wire 16 arranged on said carpet.
  • a heating body 32 is mounted in the duct 30 to raise the temperature of the steam drawn through the duct 28.
  • a conduit 33 connects these two rooms together.
  • This duct 33 is connected to a duct 34 coupled to a source of compressed air, in order to propel air under relatively high pressure in the two cold rooms 11 and 12 and thus create an overpressure, relative to the pressure prevailing in the vaporization chamber, to avoid excessive leakage of vapor.
  • Two valves 35 and 36 are controlled by a regulator 37, coupled to two temperature sensors 38 and 38 ′ respectively arranged inside intermediate chambers 13 and 14, and possibly to the regulator 26.
  • a pressure sensor 39 housed in the vaporization chamber is connected to the regulator 37.
  • two pressure rollers 40 define the inlet of the upstream cold room 11 and two pressure rollers 41 define the outlet of the downstream cold room 12.
  • Valves or flaps 42 provide a relative seal of the spray at its inlet and flaps 43 provide a similar function at its outlet.
  • the upstream cold room is generally relatively small, of the order of 0.5 m, while the downstream cold room has a substantially greater length which is usually of the order of 2 m.
  • One of the improvements made to these installations by the present invention consists in lengthening the upstream cold room, so that its length is at least equal to that of the downstream cold room, so that a temperature gradient is created inside. of this chamber, in order to reduce the thermal shock suffered by the wires fairly considerably when passing from the upstream cold chamber to the vaporization chamber.
  • This temperature gradient can be obtained quite simply by regulating, by the regulators and the valves controlled by these regulators, the pressures in the vaporization chamber and the chambers arranged upstream, so as to allow a certain diffusion of the vapor of the spray enclosure to the upstream cold room.
  • FIG. 2 illustrates other means making it possible to create a temperature gradient in the upstream chamber 11.
  • this chamber is divided into two compartments 11a and 11b separated by a partition 50, the upper wall of which comprises a valve or flap 51 intended for reduce the diffusion of air from compartment 11b to compartment 11a.
  • the conduit 33 ensuring the balance of pressures between the upstream cold room and the downstream cold room opens into the compartment 11a.
  • Compartment 11b is equipped with a air stirring device comprising a fan 52 connected by means of a duct 53 to the top of the downstream part of the compartment 11b, a duct 54 receiving the air at the outlet of the fan 52, this duct 54 being connected to a box 55, perforated at its upper surface, which generates air jets 56 intended to pass through the conveyor belt 15 to ensure preheating of the wire 16 deposited in flat turns or in a coil on this carpet. Since the conduit 53 opens at the top of the compartment 11b in its downstream part, that is to say its hottest part, this system makes it possible to preheat the wire 16. This preheating effect can be reinforced by a heating body 57 mounted inside the duct 54, and designed to heat the air conveyed by this duct.
  • FIG. 3 illustrates in more detail the improvements made to the equipment of the vaporization chamber and intended to create a temperature gradient inside this chamber.
  • the upstream cold room is equipped with various means allowing progressive preheating of the wires 16 transported by the conveyor belt 15 in order to reduce the effects of the thermal shock undergone during the passage of this cold room where a temperature usually prevails. around 60 to 80 ° C, to the vaporization chamber where a temperature usually prevails which is around 132 ° C when the threads are made of polyamide and 145 ° C when the threads are made of polyester.
  • the means equipping the upstream cold room now make it possible to reach a temperature which remains around 60 to 80 ° C at its upstream inlet and which rises to 110 or 120 ° C on the side of its downstream outlet. If no precautions are taken, a jump of the order of 20 to 40 ° C. remains however when the wires pass through the vaporization chamber 10. To reduce the effects of this jump, the vaporization chamber has been equipped a tunnel 60 disposed at its entrance, composed for example of a lower plate 61 disposed under the conveyor belt and an upper element 62 disposed above the layer of wires 16, to reduce the direct impact of the steam brewed in the vaporization chamber.
  • the suction member 29 which takes steam through a pipe 28 to discharge it into a perforated box 31 through a pipe 30 containing a heating body 32, has been moved downstream so that the stirring maximum steam takes place rather towards the middle and towards the downstream end of this chamber.
  • the action exerted by the steam jets on the wire deposited on the conveyor belt remains weak on the upstream side and gradually increases towards the middle of the treatment chamber.
  • FIGS 4 and 5 illustrate another embodiment of the upstream cold chamber 11, designed as a progressive preheating chamber.
  • the chamber contains a frame 69 supporting, for example, three consecutive boxes 70a, 70b and 70c which are arranged consecutively along the conveyor belt 15 and which surround this belt and the wires which it transports.
  • the respective bodies of these three boxes are similar and they bear the same reference numbers, with the respective indices a, b and c.
  • each box 70 is incorporated in a closed circuit for circulating hot air or an air / steam mixture, each of these circuits comprising a fan 71 placed above the box 70, a return duct 72 connecting the fan 71 and the bottom of the housing 70, a temperature probe 73, and a nozzle for injecting steam 74 or an air / steam mixture into the duct 72.
  • the steam flow is regulated by a solenoid valve 75 controlled by an adjusting device 76 so as to maintain a predetermined temperature of the air in the circuit.
  • the nozzle 74 is also connected to a source of compressed air, by means of a solenoid valve 75 ′ controlled by a device 76.
  • the air in the circuit is essentially at the same pressure than the rest of the interior of the chamber 11 and, circulating as indicated by the arrows, it crosses from bottom to top a support grid 77, the belt and the wire, then it bypasses a deflector 78 to be taken up by the fan 71.
  • the latter is driven at an adjustable speed controlled by the device 76, for example by means of a motor 79 and a variable ratio transmission 79 ′.
  • the control device 76 is arranged to maintain respective predetermined values of the temperature and the speed of the air flow in each of the housings 70, this temperature and this speed being combined with the speed of progression of the wire. so that it gradually rises in temperature in successive boxes 70 through the upstream cold room. If for some reason the carpet has to stop, the device 74 regulates the temperature and the speed of the air stream in an optimal manner to maintain a constant dye affinity over the thread. In such a chamber, depending on the products to be treated and the permanent or transient conditions, one can play on the following parameters: number of preheating circuits put into service, pressure, flow and temperature of air, flow and temperature of steam injected.
  • FIGS. 5A and 5B are similar to FIG. 5 and illustrate two alternative embodiments of heating means making it possible to adjust the temperature of the respective air circuit of each of the housings 70.
  • the housing 70 is raised by a cylindrical part 170 which contains the fan 171 and, downstream of this, a heating element 172 with electrical resistance which allows an easy and quick adjustment of the air temperature.
  • this makes it possible to preheat the air before starting the heat-setting phase with steam, by treating the wire in the chamber 11 either by hot air only, or by superheated steam injected into the circuit d 'air.
  • the bottom of the upstream cold room 11 contains a steam generator device which extends under the housings 70 and which comprises electric heating bodies 174 immersed in a water bath 175 and controlled by the temperature probes 73.
  • Steam 176 is admitted into the closed circuits through intake orifices 177 formed in the upper part of the housings 70 and which can be fitted with adjustment flaps to allow a different effect in the successive housings 70 .
  • FIG. 6 illustrates an alternative embodiment of the upstream chamber 11 which implements substantially the same method as the alternative illustrated in FIGS. 4 and 5 to impose a temperature gradient along the path of the wire and of the conveyor belt 15.
  • the chamber 11 is subdivided into several successive compartments 80a, 80b and 80c, thanks to intermediate partitions comprising valves 80 ′ for the passage to the wire.
  • Each compartment 80 is equipped with a fan 81 driven by a variable speed motor 82 to ensure mixing of the atmosphere in the compartment, a temperature probe 83, at least one steam injector 84 and at least one air injector 85. En can thus selectively inject into each compartment steam and / or air in a determined quantity and temperature, to separately regulate the temperature prevailing in each compartment. All these organs are connected to a centralized control ensuring the regulation of the entire installation.
  • FIGS. 7 and 8 show typical curves of the evolution of the temperature of the wire, respectively in a conventional thermofixation installation and in an installation according to the invention, equipped with an upstream cold room of the type illustrated by the figures 4 and 5.
  • the vaporization chamber 10 is provided with means 29 for stirring the vapor in this enclosure.
  • the upstream cold room 11 has a relatively short length L1, of the order of 0.5 m.
  • L1 the temperature of the wire changes according to curve 91 drawn in solid lines, that is to say that it remains low in the upstream cold room and that it rises suddenly at the entrance to the room. vaporization 10.
  • the steam leaks from the chamber 10 cause an increase in the temperature in the upstream chamber 11 and in the intermediate chamber 13, along curve 92, which presents the disadvantages mentioned above.
  • the upstream cold room 11 of the installation shown in FIG. 8 has a longer length L2, for example around 2.0 m., And it contains three circuits of heated air passing through respective boxes 70a, 70b and 70c.
  • Curve 94 indicates the temperature of the wire in continuous operation. The temperature in this chamber rises gradually and approaches an ideal curve 95 corresponding to a rise in temperature of the wire without any thermal shock up to the temperature T2 for heat-fixing in chamber 10.
  • the wire can control the three air circuits so to maintain in the housings 70 staggered or equal temperatures, the wire then taking a temperature according to curve 96, for example. In can also maintain lower temperatures, for example in case of prolonged stop of the carpet, then carry out a preheating before restarting.
  • FIG. 9 schematically shows a modular installation formed by any number of units 100 juxtaposed along the path of the belt 15 transporting the wires. These units are connected to each other by junction elements 101 comprising at least one transverse partition and a passage for the wires and the carpet, either in the form of a simple valve, or an airlock allowing the maintenance of a difference in pressure between the two chambers it separates.
  • Each unit 100 contains a chamber equipped with organs for injecting steam and air, organs 102 for circulating these fluids in the chamber, and organs for measuring the temperature and possibly the pressure. All these organs are linked to a central control which is programmed to maintain the operating parameters which may be different in each room.
  • These parameters include, for example, temperature, pressure, flow rate and temperature of injected vapor, flow rate and temperature of injected air, fan speed.
  • speed of the conveyor belt, the quality and quantity of the wires, as well as other parameters, are also taken into account to define the set values in the programmed command.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Artificial Filaments (AREA)

Abstract

PCT No. PCT/FR88/00118 Sec. 371 Date Aug. 15, 1989 Sec. 102(e) Date Aug. 15, 1989 PCT Filed Mar. 2, 1988 PCT Pub. No. WO88/06653 PCT Pub. Date Sep. 7, 1988.Installation including a steaming chamber, a first, upstream cold chamber and a second, downstream cold chamber, with the length of the upstream cold chamber being at least equal to that of the downstream cold chamber. The upstream and downstream cold chambers may be connected by a pressure-equalized pipe. A fan may be provided to extract the stream at the top of the steaming chamber and reinject it, after reheating by a heating element, into a perforated steaming box from which jets of steam issue below the conveyor belt, which is also perforated. The upstream cold chamber and the steaming chamber may be provided with elements for creating an upstream or downstream temperature gradient to prevent the threads from being subjected to thermal shock during passage through the steaming chamber.

Description

La présente invention concerne un procédé de traitement thermique de fils textiles en continu et notamment de thermofixation de ces fils, dans lequel on fait passer les fils, préalablement déposés sur un tapis transporteur, à travers une installation comprenant plusieurs chambres consécutives et ad,jacentes les unes aux autres dont au moins une chambre de vaporisage.The present invention relates to a continuous heat treatment process for textile yarns and in particular for heat-setting these yarns, in which the yarns, previously deposited on a conveyor belt, are passed through an installation comprising several consecutive chambers adjoining the to each other including at least one vaporization chamber.

Elle concerne egalement une installation de traitement thermique de fils textiles en continu, notamment de thermofixation de ces fils, comportant plusieurs chambres consécutives et adjacentes les unes aux autres, donc au moins une chambre de vaporisage et au moins un tapis transporteur sur lequel sont déposés ces fils et dont le parcours traverse lesdites chambres.It also relates to an installation for heat treatment of continuous textile yarns, in particular for thermofixing these yarns, comprising several consecutive chambers adjacent to each other, therefore at least one vaporization chamber and at least one conveyor belt on which these son and whose course crosses said chambers.

Les installations de thermofixation en continu développées par la demanderesse comportent habituellement une enceinte dite de vaporisage ou de thermofixation et deux chambres dites chambres froides disposées de part et d'autre de la chambre de thermofixation et séparées chacune de cette dernière par une chambre intermédiaire. L'enceinte de vaporisage est généralement remplie de vapeur saturée sous pression, que l'on fait circuler à travers le tapis et les fils qu'il porte, la température étant maintenue à une température déterminée, supérieure à 100°C. Les chambres froides amont et aval sont avantageusement reliées entre elles par un conduit approprié, pour permettre un équilibrage des pressions, et alimentées en air sous pression par une soufflerie qui permet de créer une légère surpression par rapport à la pression moyenne régnant à l'intérieur de l'enceinte de vaporisage. La présence des chambres froides en surpression et des chambres intermédiaires munies de sas a pour but d'éviter des pertes trop importantes de vapeur générée à l'intérieur de l'enceinte de vaporisage, et en conséquence de réduire Les dépenses énergétiques.The continuous thermofixation installations developed by the applicant usually comprise a so-called vaporization or thermofixation enclosure and two so-called cold chambers arranged on either side of the thermofixation chamber and each separated from the latter by an intermediate chamber. The vaporization enclosure is generally filled with saturated steam under pressure, which is circulated through the carpet and the wires which it carries, the temperature being maintained at a determined temperature, greater than 100 ° C. The upstream and downstream cold rooms are advantageously connected together by a suitable conduit, to allow pressure balancing, and supplied with pressurized air by a blower which allows to create a slight overpressure compared to the average pressure prevailing inside. of the spray enclosure. The purpose of the overpressure cold rooms and of the intermediate rooms provided with airlocks is to avoid excessive losses of steam generated inside the vaporization enclosure, and consequently to reduce energy costs.

Dans la majorité des installations connues et en service à ce jour, par exemple selon le FR-A-2 453 927, la chambre froide amont est relativement courte et n'a en principe aucune fonction particulière dans le cadre du processus de traitement du fil, si ce n'est celle d'empêcher, dans la mesure du possible, les fuites de vapeur, grâce à la surpression ambiante.In the majority of the installations known and in service to date, for example according to FR-A-2 453 927, the upstream cold room is relatively short and in principle has no particular function in the wire treatment process, except to prevent, as far as possible, steam leakage, thanks to the ambient overpressure.

La longueur moyenne de la chambre froide amont est actuellement de l'ordre de 0,5 mètre. La chambre aval a actuellement couramment une longueur de 2 mètres étant donné qu'elle joue un rôle supplémentaire par rapport à celui de la chambre amont, à savoir celui d'assurer un prérefroidissement des fils à la sortie de l'enceinte de vaporisage. L'évolution de la température dans une telle installation connue est illustrée par la figure 7 qui sera décrite en détail plus loin.The average length of the upstream cold room is currently around 0.5 meters. The downstream chamber currently has a length of 2 meters since it plays an additional role compared to that of the upstream chamber, namely that of ensuring pre-cooling of the wires at the outlet of the vaporization enclosure. The evolution of the temperature in such a known installation is illustrated by FIG. 7 which will be described in detail below.

On a constate qu'après un arrêt momentané du tapis transporteur des fils, la matière située pendant cet arrêt dans une zone voisine de la sortie de la chambre froide amont ou dans la chambre intermédiaire, et celle qui se trouve à ce moment en amont de cette zone, présentaient des affinités tinctoriales différentes. Dans la pratique, ceci se traduit, après le traitement, par des longueurs de fil dans lesquelles le colorant présente une concentration autre que sur le reste du fil, ce qui a pour conséquence l'apparition de lignes ou de bandes plus claires ou plus sombres en travers d'un tapis ou d'une piéce de tissu. Cette conséquence constitue, bien entendu, un inconvénient puisqu'il en résulte un produit présentant des défauts.It has been observed that after a temporary stop of the wire conveyor belt, the material located during this stop in an area close to the outlet of the upstream cold room or in the intermediate room, and that which is at this time upstream of this area had different dye affinities. In practice, this results, after treatment, in lengths of wire in which the dye has a concentration other than on the rest of the wire, which results in the appearance of lighter or darker lines or bands. across a carpet or piece of fabric. This consequence is, of course, a disadvantage since it results in a product having defects.

L'analyse du phénomène a permis de constater que pendant l'arrêt du tapis transporteur de fils que l'on veut thermofixer, la chaleur présente à l'intérieur de l'enceinte de vaporisage se diffuse à travers les sas délimitant la chambre intermédiaire et se répand propressivement dans la chambre froide. Le résultat en est un préchauffage des fils situés dans la zone de sortie de la chambre froide ou dans la chambre intermédiaire correspondante, ce préchauffage ayant pour conséquence une modification de structure des fibres ayant servi à la fabrication au fil, cette modification de structure entrainant une modification de l'affinité tinctoriale. On en a déduit que le passage brutal des fils de la chambre froide amont vers l'enceinte de vaporisage provoquait pour le fil un choc thermique qui est plus important lorsque le tapis transporteur est en mouvement que lorsqu'il est resté a l'arrêt pendant quelques temps, et que la différence entre les chocs thermiques subis par le fil dans les conditions de transport normal et après l'arrêt sont a l'origine de ces modifications d'affinité tinctoriale entrainant des défauts dans les produits fabriques à l'aide de ces fils.Analysis of the phenomenon has made it possible to observe that during the stopping of the wire conveyor belt which it is desired to thermofix, the heat present inside the vaporization enclosure diffuses through the airlocks delimiting the intermediate chamber and spreads slowly in the cold room. The result is a preheating of the wires located in the exit zone of the cold room or in the corresponding intermediate chamber, this preheating having as a consequence a modification of the structure of the fibers used for the manufacture of the wire, this modification of structure causing a change in dye affinity. It has been deduced therefrom that the sudden passage of the wires from the upstream cold chamber towards the vaporization enclosure caused the wire to have a more significant thermal shock. when the conveyor belt is in motion only when it has been stopped for a while, and the difference between the thermal shocks undergone by the wire under normal transport conditions and after the stop are the cause of these changes in dye affinity causing defects in the products manufactured using these threads.

La présente invention se propose de pallier cet inconvénient en apportant aux installations connues diverses améliorations permettant d'éviter que des chocs thermiques différents, subis respectivement pendant le fonctionnement continu et à l'arrêt du tapis transporteur, soient à l'origine de défauts apparents sur les produits fabriqués à l'aide des fils traités par l'installation de thermofixation.The present invention proposes to overcome this drawback by providing various known installations to the known installations in order to avoid that different thermal shocks, undergone respectively during continuous operation and when the conveyor belt is stopped, are at the origin of apparent defects on products manufactured using wires treated by the thermofixation installation.

Dans ce but, le procédé selon l'invention est caractérisé en ce que l'on provoque une augmentation graduelle de la température des fils en amont et/ou en aval de l'entrée de la chambre de vaporisage, de manière à diminuer le choc thermique subi par les fils entrant dans cette chambre.For this purpose, the method according to the invention is characterized in that a gradual increase in the temperature of the wires is brought upstream and / or downstream of the inlet of the vaporization chamber, so as to reduce the shock thermal undergone by the wires entering this room.

Selon une première forme de mise en oeuvre de ce procédé, on produit un gradient de température positif dans le sens de déplacement du tapis transporteur, dans une chambre froide amont adjacente à l'entrée de la chambre de vaporisage.According to a first embodiment of this method, a positive temperature gradient is produced in the direction of movement of the conveyor belt, in an upstream cold room adjacent to the inlet of the vaporization chamber.

Selon une deuxieme forme de mise en oeuvre de ce procédé, on subdivise la chambre froide amont en plusieurs compartiments traversés successivement par les fils et on maintient des conditions de température différentes dans ces différents compartiments.According to a second form of implementation of this process, the upstream cold room is subdivided into several compartments successively crossed by the wires and different temperature conditions are maintained in these different compartments.

Selon un troisième mode de mise en oeuvre du procédé selon l'invention, on produit à l'intérieur de la chambre de vaporisage un gradient de température positif dans le sens de déplacement du tapis transporteur.According to a third embodiment of the method according to the invention, a positive temperature gradient is produced inside the vaporization chamber in the direction of movement of the conveyor belt.

Dans une forme préférée du procédé, on impose un gradient de temperature déterminé le long d'au moins une partie du parcours du tapis en maintenant, dans plusieurs chambres consécutives ou dans des compartiments consécutifs ménagés dans une plusieurs chambres, des températures respectives qui sont différentes et échelonnées graduellement.In a preferred form of the method, a determined temperature gradient is imposed along at least part of the course of the carpet in now, in several consecutive chambers or in consecutive compartments formed in one or more chambers, respective temperatures which are different and gradually staggered.

Pour aboutir à ce résultat, on peut prélever, au moins dans le dernier compartiment précédant la chambre de vaporisage, de l'air dans la partie supérieure aval de ce compartiment pour le réinjecter au bas de sa partie amont. Cet air prélevé dans la zone supérieure aval est de préférence chauffé ou refroidi par une source extérieure avant d'être reinjecté au bas de la partie amont du compartiment concerné. De preférence, l'air est chauffé par un apport de vapeur ou refroidi par un apport d'air frais.To achieve this result, it is possible to withdraw, at least in the last compartment preceding the vaporization chamber, air in the upper downstream part of this compartment in order to reinject it at the bottom of its upstream part. This air taken from the upper downstream zone is preferably heated or cooled by an external source before being reinjected at the bottom of the upstream part of the compartment concerned. Preferably, the air is heated by a supply of steam or cooled by a supply of fresh air.

Pour créer ledit gradient de température dans l'enceinte de vaporisage, on peut avantageusement protéger les fils disposés sur le tapis transporteur contre un flux de vapeur transporteur de chaleur, dans la zone d'entrée de l'enceinte de vaporisage.To create said temperature gradient in the vaporization enclosure, it is advantageous to protect the wires arranged on the conveyor belt against a flow of heat-transporting vapor, in the inlet zone of the vaporization enclosure.

En combinaison avec cette mesure ou indépendamment, on peut créer ledit gradient de temperature en réinjectant, dans la zone centrale de ladite enceinte de vaporisage, de la vapeur d'eau prélevée au haut de la partie aval de cette chambre, afin de provoquer un brassage de cette vapeur dans ladite zone centrale.In combination with this measurement or independently, it is possible to create said temperature gradient by reinjecting, in the central zone of said vaporization enclosure, water vapor taken from the top of the downstream part of this chamber, in order to cause stirring. of this vapor in said central area.

L'installation selon l'invention est caractérisée en ce qu'elle comporte des moyens pour créer une augmentation graduelle de la température des fils en amont et/ou en aval de l'entrée de la chambre de vaporisage, de manière à diminuer le choc thermique subi par les fils entrant dans cette chambre.The installation according to the invention is characterized in that it comprises means for creating a gradual increase in the temperature of the wires upstream and / or downstream of the inlet of the vaporization chamber, so as to reduce the shock thermal undergone by the wires entering this room.

Dans une installation comportant deux chambres froides disposées de part et d'autre de la chambre de vaporisage et deux chambres intermédiaires localisées d'une part entre la chambre froide amont et la chambre de vaporisage et d'autre part entre la chambre de vaporisage et la chambre froide aval, la chambre froide amont a une longueur au moins égale à celle de la chambre froide aval. Cette chambre froide amont comporte avantageusement au moins deux compartiments cloisonnés et le dernier compartiment, dans le sens de la circulation du tapis transporteur, est de préférence équipé de moyens pour élever la température de l'air ambiant à une valeur supérieure à celle des autres compartiments.In an installation comprising two cold chambers arranged on either side of the vaporization chamber and two intermediate chambers located on the one hand between the upstream cold chamber and the vaporization chamber and on the other hand between the vaporization chamber and the downstream cold room, the upstream cold room has a length at least equal to that of the downstream cold room. This upstream cold room advantageously comprises at least two partitioned compartments and the last compartment, in the direction of circulation of the conveyor belt, is preferably equipped with means for raising the temperature of the ambient air to a value higher than that of the other compartments.

Les moyens pour élever la température dans ce dernier compartiment peuvent comporter avantageusement un organe d'aspiration pour aspirer de l'air au haut de la partie aval de ce compartiment et pour le refouler au bas de sa partie amont, ainsi qu'un corps de chauffe agence pour élever la température de cet air avant sa réinjection dans le compartiment.The means for raising the temperature in the latter compartment may advantageously include a suction member for sucking air at the top of the downstream part of this compartment and for discharging it at the bottom of its upstream part, as well as a body of agency heater to raise the temperature of this air before re-injecting it into the compartment.

Dans une forme de réalisation particulière, la chambre froide amont peut contenir au moins deux compartiments disposés consécutivement le long du tapis transporteur et autour de celui-ci, chaque compartiment étant équipé de moyens pour faire circuler un courant d'air, ou d'air et de vapeur, à travers le tapis et le fil, de moyens pour chauffer ou refroidir cet air, et de moyens de commande pour régler la température et/ou le débit de l'air. Chacun desdits compartiments peut avantageusement être constitué par un bottier incorporé dans un circuit ferme respectif. D'autre part, lesdits moyens pour chauffer l'air peuvent comporter un dispositif d'injection d'une quantité dosée de vapeur dans le courant d'air. Les moyens pour refroidir cet air peuvent également comporter un dispositif d'injection d'une quantité dosée d'air froid.In a particular embodiment, the upstream cold room can contain at least two compartments arranged consecutively along and around the conveyor belt, each compartment being equipped with means for circulating a stream of air, or air and steam, through the carpet and the wire, means for heating or cooling this air, and control means for regulating the temperature and / or the flow of air. Each of said compartments can advantageously be constituted by a shoemaker incorporated in a respective firm circuit. On the other hand, said means for heating the air may comprise a device for injecting a metered quantity of vapor into the air stream. The means for cooling this air may also include a device for injecting a metered quantity of cold air.

Les moyens pour chauffer l'air comportent avantageusement au moins un corps de chauffe à résistance électrique disposé dans ledit circuit fermé.The means for heating the air advantageously comprise at least one electric resistance heater disposed in said closed circuit.

Selon une forme de réalisation particulièrement avantageuse, la chambre froide amont contient un dispositif générateur de vapeur situé à l'extérieur desdits boitiers, lesquels comportent des orifices d'admission de vapeur.According to a particularly advantageous embodiment, the upstream cold room contains a steam generator device located outside of said boxes, which have steam inlet orifices.

Selon une forme de réalisation, la chambre de vaporisage comporte dans la zone voisine de son entrée un tunnel disposé sur la trajectoire du tapis transporteur, ce tunnel comportant des parois conçues pour constituer un écran thermique pour le fil transporté.According to one embodiment, the vaporization chamber comprises in the area near its entrance a tunnel arranged on the trajectory of the conveyor belt, this tunnel comprising walls designed to constitute a heat shield for the transported wire.

Lesdits moyens pour créer un gradient de température dans la chambre de vaporisage comportent avantageusement un organe d'aspiration pour prélever de la vapeur au haut de la partie aval de cette chambre et pour la réinjecter au bas d'une zone centrale, et un corps de chauffe agencé pour élever la température de cette vapeur avant sa réinjection dans cette chambre.Said means for creating a temperature gradient in the vaporization chamber advantageously comprise a suction member for withdrawing steam at the top of the downstream part of this chamber and for reinjecting it at the bottom of a central zone, and a body of heater arranged to raise the temperature of this vapor before its reinjection into this chamber.

Pour assurer l'équilibre des pressions entre les deux chambres froides, l'installation comporte de préférence un premier conduit agencé pour relier entre elles ces deux chambres, ce conduit étant connecté à un second conduit d'alimentation relié à une source d'air sous pression, ledit second conduit étant équipé d'une vanne commandée par un premier régulateur raccordé au moins à deux sondes de température disposées respectivement dans les deux chambres intermédiaires, et à une sonde de pression disposée dans la chambre de vaporisage. Le premier conduit débouche de préférence dans la chambre froide amont à l'intérieur du compartiment dispose le plus en amont. La chambre de vaporisage contient avantageusement une sonde de température connectée à un second régulateur agencé pour commander une vanne montée sur le conduit d'alimentation en vapeur d'eau de cette chambre de vaporisage, et lesdits premier et second régulateurs sont de préférence couplés entre eux.To ensure the pressure balance between the two cold rooms, the installation preferably comprises a first duct arranged to connect these two rooms together, this duct being connected to a second supply duct connected to a source of air under pressure, said second conduit being equipped with a valve controlled by a first regulator connected at least to two temperature probes disposed respectively in the two intermediate chambers, and to a pressure probe arranged in the vaporization chamber. The first conduit preferably opens into the upstream cold room inside the compartment located most upstream. The vaporization chamber advantageously contains a temperature probe connected to a second regulator arranged to control a valve mounted on the water vapor supply duct of this vaporization chamber, and said first and second regulators are preferably coupled together .

Une autre forme de réalisation d'une installation selon l'invention comprend une serie modulaire d'unités consécutives comportant chacune une chambre munie de moyens de brassage pour faire circuler de l'air et/ou de la vapeur dans la chambre, et des moyens de réglage pour maintenir une température déterminée dans la chambre. De préférence, cette installation comporte une commande centralisée, agencée pour commander l'ensemble des moyens de brassage et des moyens de réglage, et au moins l'une desdites unités est agencée pour contenir de la vapeur sous pression.Another embodiment of an installation according to the invention comprises a modular series of consecutive units each comprising a chamber provided with stirring means for circulating air and / or steam in the chamber, and means to maintain a certain temperature in the room. Preferably, this installation comprises a centralized control, arranged to control all of the stirring means and of the adjustment means, and at least one of said units is arranged to contain steam under pressure.

La présente invention sera mieux comprise en référence à la description d'exemples de réalisation et des dessins annexés dans lesquels :

  • La figure 1 représente schématiquement en coupe longitudinale une première forme de réalisation de l'installation selon l'invention,
  • La figure 2 représente une vue schématique d'une forme de réalisation préferée de la chambre froide amont,
  • La figure 3 représente une vue schématique d'une forme de réalisation préférée de l'enceinte de vaporisage,
  • La figure 4 représente une vue schématique en coupe longitudinale d'une autre forme de réalisation de la chambre froide amont,
  • La figure 5 est une vue en coupe transversale suivant la ligne V-V de la figure 4,
  • Les figures 5A et 5B sont des vues similaires à la fig. 5 et representent deux variantes de réalisation,
  • La figure 6 est une vue analogue à la fig.4, montrant une autre variante de la réalisation,
  • La figure 7 est un diagramme montrant l'évolution de la température du fil dans une installation de thermofixation comportant une chambre froide amont selon l'art antérieur,
  • La figure 8 est un diagramme montrant l'évolution de la temperature du fil dans une installation comportant une chambre froide amont selon la fig.4, et
  • La figure 9 représente une vue schématique en élévation d'une installation selon l'invention, réalisée sous forme modulaire, et un diagramme de variation de la température T dans cette installation.
The present invention will be better understood with reference to the description of embodiments and attached drawings in which:
  • FIG. 1 schematically shows in longitudinal section a first embodiment of the installation according to the invention,
  • FIG. 2 represents a schematic view of a preferred embodiment of the upstream cold room,
  • FIG. 3 represents a schematic view of a preferred embodiment of the vaporization enclosure,
  • FIG. 4 represents a schematic view in longitudinal section of another embodiment of the upstream cold room,
  • FIG. 5 is a cross-sectional view along the line VV of FIG. 4,
  • FIGS. 5A and 5B are views similar to FIG. 5 and represent two variant embodiments,
  • FIG. 6 is a view similar to FIG. 4, showing another variant of the embodiment,
  • FIG. 7 is a diagram showing the evolution of the temperature of the wire in a thermofixation installation comprising an upstream cold room according to the prior art,
  • FIG. 8 is a diagram showing the evolution of the temperature of the wire in an installation comprising an upstream cold room according to FIG. 4, and
  • FIG. 9 represents a schematic elevation view of an installation according to the invention, produced in modular form, and a diagram of variation of the temperature T in this installation.

En réference à la figure 1, l'installation représentée comporte une chambre de vaporisage 10, une chambre froide amont 11, une chambre froide aval 12 et deux chambres intermédiaires 13 et 14. D'une manière connue en soi, un tapis transporteur 15 traverse successivement la chambre froide amont 11, la chambre intermédiaire 13, la chambre de vaporisage 10, la chambre intermédiaire 14 et la chambre froide aval 12 et transporte un ou plusieurs fils 16 enroulés en spires superposées ou en boudin pour assurer la thermofixation des fils. La chambre de vaporisage est associée à un générateur de vapeur 17 qui peut être constitué d'un serpentin chauffant 18 véhiculant de la vapeur et logé à l'intérieur d'un bac 19 rempli d'eau, ou d'une tubulure perforée 20 qui libère des jets de vapeur 21 à l'intérieur de la chambre ou, comme montré sur la fig. 1, une combinaison de ces deux moyens. Un tuyau d'alimentation 22 commun à ces deux circuits, qui peuvent être utilises separément grâce à deux vannes 23 et 24, est équipé d'une vanne 25 commandée par un régulateur 26 auquel est raccordée une sonde 27 de mesure de la température de la vapeur contenue à l'intérieur de la chambre de vaporisage 10.With reference to FIG. 1, the installation shown comprises a vaporization chamber 10, an upstream cold chamber 11, a chamber downstream cold 12 and two intermediate chambers 13 and 14. In a manner known per se, a conveyor belt 15 successively passes through the upstream cold chamber 11, the intermediate chamber 13, the vaporization chamber 10, the intermediate chamber 14 and the cold chamber downstream 12 and transports one or more wires 16 wound in superimposed turns or in a rod to ensure the heat fixing of the wires. The vaporization chamber is associated with a steam generator 17 which may consist of a heating coil 18 conveying steam and housed inside a tank 19 filled with water, or a perforated tube 20 which releases steam jets 21 inside the chamber or, as shown in FIG. 1, a combination of these two means. A supply pipe 22 common to these two circuits, which can be used separately thanks to two valves 23 and 24, is equipped with a valve 25 controlled by a regulator 26 to which is connected a probe 27 for measuring the temperature of the vapor contained inside the vaporization chamber 10.

Pour assurer un brassage efficace de la vapeur à l'intérieur de la chambre de vaporisage, celle-ci est équipée d'un conduit de sortie 28 menagé au haut de l'enceinte 10 et raccordé à un organe d'aspiration 29 agence pour refouler la vapeur prélevée dans un conduit 30 pour la diriger vers un caisson 31, perforé à sa surface supérieure, et dispose sous le tapis transporteur 15, lui-même perforé pour permettre un passage forcé de la vapeur à travers les spires de fil 16 disposées sur ledit tapis. Un corps de chauffe 32 est monté dans le conduit 30 pour élever la température de la vapeur aspirée à travers le conduit 28.To ensure efficient stirring of the vapor inside the vaporization chamber, the latter is equipped with an outlet duct 28 arranged at the top of the enclosure 10 and connected to a suction member 29 which is arranged to discharge the vapor taken from a conduit 30 to direct it towards a box 31, perforated on its upper surface, and placed under the conveyor belt 15, itself perforated to allow forced passage of the vapor through the turns of wire 16 arranged on said carpet. A heating body 32 is mounted in the duct 30 to raise the temperature of the steam drawn through the duct 28.

Pour permettre d'équilibrer les pressions régnant à l'intérieur des deux chambres froides, un conduit 33 relie ces deux chambres entre elles. Ce conduit 33 est raccorde à un conduit 34 couplé à une source d'air comprimé, afin de propulser de l'air sous pression relativement élevée dans les deux chambres froides 11 et 12 et créer ainsi une surpression, par rapport à la pression régnant dans la chambre de vaporisage, pour éviter des fuites trop importantes de vapeur. Deux vannes 35 et 36 sont commandées par un régulateur 37, couplé à deux sondes de temperature 38 et 38′ respectivement disposées à l'intérieur des chambres intermédiaires 13 et 14, et éventuellement au régulateur 26. Un capteur de pression 39 logé dans la chambre de vaporisage est connecté au régulateur 37.To allow the pressures prevailing inside the two cold rooms to be balanced, a conduit 33 connects these two rooms together. This duct 33 is connected to a duct 34 coupled to a source of compressed air, in order to propel air under relatively high pressure in the two cold rooms 11 and 12 and thus create an overpressure, relative to the pressure prevailing in the vaporization chamber, to avoid excessive leakage of vapor. Two valves 35 and 36 are controlled by a regulator 37, coupled to two temperature sensors 38 and 38 ′ respectively arranged inside intermediate chambers 13 and 14, and possibly to the regulator 26. A pressure sensor 39 housed in the vaporization chamber is connected to the regulator 37.

D'une manière connue en soi, deux rouleaux presseurs 40 définissent l'entrée de la chambre froide amont 11 et deux rouleaux presseurs 41 définissent la sortie de la chambre froide aval 12. Des clapets ou volets 42 assurent une étanchéité relative de la chambre de vaporisage à son entrée et des volets 43 assurent une fonction similaire à sa sortie.In a manner known per se, two pressure rollers 40 define the inlet of the upstream cold room 11 and two pressure rollers 41 define the outlet of the downstream cold room 12. Valves or flaps 42 provide a relative seal of the spray at its inlet and flaps 43 provide a similar function at its outlet.

Dans les installations connues de ce type, la chambre froide amont est généralement relativement petite, de l'ordre de 0,5 m, alors que la chambre froide aval a une longueur sensiblement plus importante qui est habituellement de l'ordre de 2 m. Un des perfectionnements apportés à ces installations par la présente invention consiste à rallonger la chambre froide amont, de sorte que sa longueur soit au moins égale à celle de la chambre froide aval, afin qu'il se crée un gradient de température à l'intérieur de cette chambre, pour réduire de façon assez conséquente le choc thermique subi par les fils au passage de la chambre froide amont à la chambre de vaporisage. Ce gradient de température peut être obtenu tout simplement en réglant, par les régulateurs et les vannes commandées par ces régulateurs, les pressions dans la chambre de vaporisage et les chambres disposées en amont, de manière à autoriser une certaine diffusion de la vapeur de l'enceinte de vaporisage vers la chambre froide amont.In known installations of this type, the upstream cold room is generally relatively small, of the order of 0.5 m, while the downstream cold room has a substantially greater length which is usually of the order of 2 m. One of the improvements made to these installations by the present invention consists in lengthening the upstream cold room, so that its length is at least equal to that of the downstream cold room, so that a temperature gradient is created inside. of this chamber, in order to reduce the thermal shock suffered by the wires fairly considerably when passing from the upstream cold chamber to the vaporization chamber. This temperature gradient can be obtained quite simply by regulating, by the regulators and the valves controlled by these regulators, the pressures in the vaporization chamber and the chambers arranged upstream, so as to allow a certain diffusion of the vapor of the spray enclosure to the upstream cold room.

Un tel contrôle ne permet pas toujours une bonne maîtrise du gradient de température. En pratique, il est préférable de régler plus directement cette température. La fig. 2 illustre d'autres moyens permettant de créer un gradient de température dans la chambre amont 11. A cet effet, cette chambre est divisée en deux compartiments 11a et 11b séparés par une cloison 50 dont la paroi supérieure comporte un clapet ou volet 51 destiné à diminuer la diffusion de l'air du compartiment 11b vers le compartiment 11a. Le conduit 33 assurant l'équilibre des pressions entre la chambre froide amont et la chambre froide aval débouche dans le compartiment 11a. Le compartiment 11b est équipé d'un dispositif de brassage de l'air comprenant un ventilateur 52 raccordé à l'aide d'un conduit 53 au haut de la partie aval du compartiment 11b, un conduit 54 recevant l'air à la sortie du ventilateur 52, ce conduit 54 étant raccordé à un caisson 55, perforé à sa surface supérieure, qui engendre des jets d'air 56 destinés à traverser le tapis transporteur 15 pour assurer un préchauffage du fil 16 déposé en spires plates ou en boudin sur ce tapis. Etant donné que le conduit 53 débouche au haut du compartiment 11b dans sa partie aval, c'est-à-dire sa partie la plus chaude, ce système permet d'assurer un préchauffage du fil 16. Cet effet de préchauffage peut être renforcé par un corps de chauffe 57 monté à l'intérieur du conduit 54, et conçu pour assurer un chauffage de l'air véhiculé par ce conduit.Such control does not always allow good control of the temperature gradient. In practice, it is preferable to adjust this temperature more directly. Fig. 2 illustrates other means making it possible to create a temperature gradient in the upstream chamber 11. For this purpose, this chamber is divided into two compartments 11a and 11b separated by a partition 50, the upper wall of which comprises a valve or flap 51 intended for reduce the diffusion of air from compartment 11b to compartment 11a. The conduit 33 ensuring the balance of pressures between the upstream cold room and the downstream cold room opens into the compartment 11a. Compartment 11b is equipped with a air stirring device comprising a fan 52 connected by means of a duct 53 to the top of the downstream part of the compartment 11b, a duct 54 receiving the air at the outlet of the fan 52, this duct 54 being connected to a box 55, perforated at its upper surface, which generates air jets 56 intended to pass through the conveyor belt 15 to ensure preheating of the wire 16 deposited in flat turns or in a coil on this carpet. Since the conduit 53 opens at the top of the compartment 11b in its downstream part, that is to say its hottest part, this system makes it possible to preheat the wire 16. This preheating effect can be reinforced by a heating body 57 mounted inside the duct 54, and designed to heat the air conveyed by this duct.

La figure 3 illustre de façon plus détaillée les améliorations apportées aux équipements de la chambre de vaporisage et destinées à créer un gradient de temperature à l'intérieur de cette chambre. Comme mentionné précédemment, la chambre froide amont est équipée de différents moyens permettant de réaliser un préchauffage progressif des fils 16 transportés par le tapis transporteur 15 afin de réduire les effets du choc thermique subi lors du passage de cette chambre froide où regne habituellement une température de l'ordre de 60 à 80°C, vers la chambre de vaporisage où règne habituellement une temperature qui est de l'ordre de 132°C lorsque les fils sont en polyamide et de 145°C lorsque les fils sont en polyester. Les moyens équipant la chambre froide amont permettent maintenant d'aboutir à une température qui reste de l'ordre de 60 à 80°C à son entrée amont et qui s'élève à 110 ou 120°C du côté de sa sortie aval. Si aucune précaution n'est prise, il reste cependant un saut de l'ordre de 20 à 40°C lors du passage des fils dans la chambre de vaporisage 10. Pour diminuer les effets de ce saut, on a équipé la chambre de vaporisage d'un tunnel 60 disposé à son entrée, composé par exemple d'une plaque inférieure 61 disposée sous le tapis transporteur et d'un élément supérieur 62 disposé au-dessus de la couche de fils 16, pour diminuer l'impact direct de la vapeur brassée dans l'enceinre de vaporisage. En outre, l'organe d'aspiration 29 qui prélève de la vapeur par un conduit 28 pour la refouler dans un caisson perforé 31 à travers un conduit 30 contenant un corps de chauffe 32, a été déplace en aval de sorte que le brassage maximal de la vapeur s'effectue plutôt vers le milieu et vers l'extrémité aval de cette chambre. Ainsi l'action exercée par les jets de vapeur sur le fil dépose sur le tapis transporteur reste faible du côté amont et s'accroît progressivement vers le milieu de la chambre de traitement.FIG. 3 illustrates in more detail the improvements made to the equipment of the vaporization chamber and intended to create a temperature gradient inside this chamber. As mentioned above, the upstream cold room is equipped with various means allowing progressive preheating of the wires 16 transported by the conveyor belt 15 in order to reduce the effects of the thermal shock undergone during the passage of this cold room where a temperature usually prevails. around 60 to 80 ° C, to the vaporization chamber where a temperature usually prevails which is around 132 ° C when the threads are made of polyamide and 145 ° C when the threads are made of polyester. The means equipping the upstream cold room now make it possible to reach a temperature which remains around 60 to 80 ° C at its upstream inlet and which rises to 110 or 120 ° C on the side of its downstream outlet. If no precautions are taken, a jump of the order of 20 to 40 ° C. remains however when the wires pass through the vaporization chamber 10. To reduce the effects of this jump, the vaporization chamber has been equipped a tunnel 60 disposed at its entrance, composed for example of a lower plate 61 disposed under the conveyor belt and an upper element 62 disposed above the layer of wires 16, to reduce the direct impact of the steam brewed in the vaporization chamber. In addition, the suction member 29 which takes steam through a pipe 28 to discharge it into a perforated box 31 through a pipe 30 containing a heating body 32, has been moved downstream so that the stirring maximum steam takes place rather towards the middle and towards the downstream end of this chamber. Thus the action exerted by the steam jets on the wire deposited on the conveyor belt remains weak on the upstream side and gradually increases towards the middle of the treatment chamber.

Les figures 4 et 5 illustrent une autre forme de réalisation de la chambre froide amont 11, conçue comme un chambre de préchauffage progressif. La chambre renferme un bâti 69 supportant, par exemple, trois boîtiers consécutifs 70a, 70b et 70c qui sont disposés consécutivement le long du tapis transporteur 15 et qui entourent ce tapis et les fils qu'il transporte. Les organes respectifs de ces trois boitier sont similaires et ils portent les mêmes numéros de référence, avec les indices respectifs a, b et c. Comme le montrent les figures, chaque boîtier 70 est incorporé dans un circuit fermé de circulation d'air chaud ou d'un mélange air/vapeur, chacun de ces circuit comportant un ventilateur 71 disposé au dessus du boîtier 70, un conduit de retour 72 reliant le ventilateur 71 et le bas du boîtier 70, une sonde de température 73, et une buse d'injection de vapeur 74 ou d'un mélange air/vapeur dans le conduit 72. Le débit de vapeur est réglé par une électrovanne 75 commandée par un dispositif de réglage 76 de manière à maintenir une température prédéterminée de l'air dans le circuit. Afin de permettre aussi de refroidir cette atmosphère, la buse 74 est également raccordée à une source d'air comprimé, par l'intermédiaire d'une électrovanne 75′ commandée par une dispositif 76. L'air du circuit se trouve sensiblement à la même pression que le reste de l'interieur de la chambre 11 et, en circulant comme l'indiquent les flèches, il traverse de bas en haut une grille de support 77, le tapis et le fil, puis il contourne un déflecteur 78 pour être repris par le ventilateur 71. Celui-ci est entraine à une vitesse réglable commandée par le dispositif 76, par exemple grâce à un moteur 79 et une transmission à rapport variable 79′.Figures 4 and 5 illustrate another embodiment of the upstream cold chamber 11, designed as a progressive preheating chamber. The chamber contains a frame 69 supporting, for example, three consecutive boxes 70a, 70b and 70c which are arranged consecutively along the conveyor belt 15 and which surround this belt and the wires which it transports. The respective bodies of these three boxes are similar and they bear the same reference numbers, with the respective indices a, b and c. As the figures show, each box 70 is incorporated in a closed circuit for circulating hot air or an air / steam mixture, each of these circuits comprising a fan 71 placed above the box 70, a return duct 72 connecting the fan 71 and the bottom of the housing 70, a temperature probe 73, and a nozzle for injecting steam 74 or an air / steam mixture into the duct 72. The steam flow is regulated by a solenoid valve 75 controlled by an adjusting device 76 so as to maintain a predetermined temperature of the air in the circuit. In order to also allow this atmosphere to cool, the nozzle 74 is also connected to a source of compressed air, by means of a solenoid valve 75 ′ controlled by a device 76. The air in the circuit is essentially at the same pressure than the rest of the interior of the chamber 11 and, circulating as indicated by the arrows, it crosses from bottom to top a support grid 77, the belt and the wire, then it bypasses a deflector 78 to be taken up by the fan 71. The latter is driven at an adjustable speed controlled by the device 76, for example by means of a motor 79 and a variable ratio transmission 79 ′.

Le dispositif de commande 76 est agencé pour maintenir des valeurs respectives prédéterminées de la température et de la vitesse du courant d'air dans chacun des boîtier 70, cette température et cette vitesse étant combinées avec la vitesse de progression du fil de manière que celui-ci monte graduellement en température dans les boitiers successifs 70 en traversant la chambre froide amont. Si pour une raison quelconque le tapis doit s'arrêter, le dispositif 74 règle la temperature et la vitesse du courant d'air d'une manière optimale pour conserver au fil une affinité tinctoriale constante. Dans une telle chambre, selon les produits à traiter et les conditions permanentes ou transitoires, on peut jouer sur les paramètres suivants: nombre de circuits de préchauffage mis en service, pression, débit et température de l'air, débit et température de la vapeur injectée.The control device 76 is arranged to maintain respective predetermined values of the temperature and the speed of the air flow in each of the housings 70, this temperature and this speed being combined with the speed of progression of the wire. so that it gradually rises in temperature in successive boxes 70 through the upstream cold room. If for some reason the carpet has to stop, the device 74 regulates the temperature and the speed of the air stream in an optimal manner to maintain a constant dye affinity over the thread. In such a chamber, depending on the products to be treated and the permanent or transient conditions, one can play on the following parameters: number of preheating circuits put into service, pressure, flow and temperature of air, flow and temperature of steam injected.

Les figures 5A et 5B sont similaires à la figure 5 et illustrent deux variantes de réalisation de moyens de chauffage permettant de régler la temperature du circuit d'air respectif de chacun des boîtiers 70. Dans le cas de la figure 5A, le boîtier 70 est surélevé par une partie cylindrique 170 qui contient le ventilateur 171 et, en aval de celui-ci, un corps de chauffe 172 à résistance électrique qui permet un reglage facile et rapide de la température de l'air. En outre, cela permet de préchauffer l'air avant d'entamer la phase de thermofixation a la vapeur, en traitant le fil dans la chambre 11 soit par de l'air chaud uniquement, soit par de la vapeur surchauffée injectée dans le circuit d'air.FIGS. 5A and 5B are similar to FIG. 5 and illustrate two alternative embodiments of heating means making it possible to adjust the temperature of the respective air circuit of each of the housings 70. In the case of FIG. 5A, the housing 70 is raised by a cylindrical part 170 which contains the fan 171 and, downstream of this, a heating element 172 with electrical resistance which allows an easy and quick adjustment of the air temperature. In addition, this makes it possible to preheat the air before starting the heat-setting phase with steam, by treating the wire in the chamber 11 either by hot air only, or by superheated steam injected into the circuit d 'air.

Dans l'exemple de la figure 5B, le fond de la chambre froide amont 11 contient un dispositif générateur de vapeur qui s'étend sous les boîtiers 70 et qui comporte des corps de chauffe électriques 174 plongés dans un bain d'eau 175 et commandés par les sondes de température 73. La vapeur 176 est admise dans les circuits fermés à travers des orifices d'admission 177 ménagés dans la partie supérieure des boîtiers 70 et pouvant être équipés de volets de réglage pour permettre un effet different dans les boîtiers 70 successifs.In the example of FIG. 5B, the bottom of the upstream cold room 11 contains a steam generator device which extends under the housings 70 and which comprises electric heating bodies 174 immersed in a water bath 175 and controlled by the temperature probes 73. Steam 176 is admitted into the closed circuits through intake orifices 177 formed in the upper part of the housings 70 and which can be fitted with adjustment flaps to allow a different effect in the successive housings 70 .

La figure 6 illustre une variante de réalisation de la chambre amont 11 qui met en oeuvre sensiblement le même procédé que la variante illustrée par les figures 4 et 5 pour imposer un gradient de température le long du parcours du fil et du tapis transporteur 15. La chambre 11 est subdivisée en plusieurs compartiments successifs 80a, 80b et 80c, grâce à des cloisons intermédiaires comportant des clapets 80′ pour le passage au fil. Chaque compartiment 80 est équipé d'un ventilateur 81 entraîné par un moteur 82 à vitesse variable pour assurer le brassage de l'atmosphère dans le compartiment, d'une sonde de température 83, d'au moins un injecteur de vapeur 84 et d'au moins un injecteur d'air 85. En peut ainsi injecter de manière sélective dans chaque compartiment de la vapeur et/ou de l'air en quantité et température déterminées, pour régler séparément la température régnant dans chaque compartiment. Tous ces organes sont relies à une commande centralisée assurant la régulation de l'ensemble de l'installation.FIG. 6 illustrates an alternative embodiment of the upstream chamber 11 which implements substantially the same method as the alternative illustrated in FIGS. 4 and 5 to impose a temperature gradient along the path of the wire and of the conveyor belt 15. The chamber 11 is subdivided into several successive compartments 80a, 80b and 80c, thanks to intermediate partitions comprising valves 80 ′ for the passage to the wire. Each compartment 80 is equipped with a fan 81 driven by a variable speed motor 82 to ensure mixing of the atmosphere in the compartment, a temperature probe 83, at least one steam injector 84 and at least one air injector 85. En can thus selectively inject into each compartment steam and / or air in a determined quantity and temperature, to separately regulate the temperature prevailing in each compartment. All these organs are connected to a centralized control ensuring the regulation of the entire installation.

Les diagrammes des figures 7 et 8 montrent des courbes typiques de l'évolution de la température du fil, respectivement dans une installation classique de thermofixation et dans une installation selon l'invention, équipée d'une chambre froide amont du type illustré par les figures 4 et 5. Dans les deux cas, la chambre de vaporisage 10 est munie de moyens 29 pour brasser la vapeur dans cette enceinte.The diagrams in FIGS. 7 and 8 show typical curves of the evolution of the temperature of the wire, respectively in a conventional thermofixation installation and in an installation according to the invention, equipped with an upstream cold room of the type illustrated by the figures 4 and 5. In both cases, the vaporization chamber 10 is provided with means 29 for stirring the vapor in this enclosure.

Dans le cas de la figure 7, la chambre froide amont 11 a une longueur L1 relativement faible, de l'ordre de 0,5 m. En fonctionnement normal, la temperature du fil évolue selon la courbe 91 dessinée en trait continu, c'est-a-dire qu'elle reste faible dans la chambre froide amont et qu'elle s'élève brusquement à l'entrée de la chambre de vaporisage 10. Cependant, si le tapis transporteur s'arrête, les fuites de vapeur provenant de la chambre 10 provoquent une augmentation de la température dans la chambre amont 11 et dans la chambre intermédiaire 13, suivant la courbe 92, ce qui présente les inconvénients mentionnés plus haut.In the case of FIG. 7, the upstream cold room 11 has a relatively short length L1, of the order of 0.5 m. In normal operation, the temperature of the wire changes according to curve 91 drawn in solid lines, that is to say that it remains low in the upstream cold room and that it rises suddenly at the entrance to the room. vaporization 10. However, if the conveyor belt stops, the steam leaks from the chamber 10 cause an increase in the temperature in the upstream chamber 11 and in the intermediate chamber 13, along curve 92, which presents the disadvantages mentioned above.

Par contre, la chambre froide amont 11 de l'installation représentée sur la figure 8 a une longueur L2 plus grande, par exemple environ 2,0 m., et elle renferme trois circuits d'air chauffé traversant des boîtiers respectifs 70a, 70b et 70c. La courbe 94 indique la température au fil en marche continue. La température dans cette chambre monte progressivement et se rapproche d'une courbe idéale 95 correspondant a une montée en température du fil sans aucun choc thermique jusqu'à la température T2 de thermofixation dans la chambre 10. En cas d'arrêt du tapis, on peut commander les trois circuits d'air de manière à maintenir dans les boîtiers 70 des températures échelonnées ou égales, le fil prenant alors une température selon la courbe 96, par exemple. En peut aussi maintenir des températures plus basses, par exemple en cas d'arrêt prolongé du tapis, puis effectuer un préchauffage avant le redémarrage.On the other hand, the upstream cold room 11 of the installation shown in FIG. 8 has a longer length L2, for example around 2.0 m., And it contains three circuits of heated air passing through respective boxes 70a, 70b and 70c. Curve 94 indicates the temperature of the wire in continuous operation. The temperature in this chamber rises gradually and approaches an ideal curve 95 corresponding to a rise in temperature of the wire without any thermal shock up to the temperature T2 for heat-fixing in chamber 10. In the event of the carpet stopping, can control the three air circuits so to maintain in the housings 70 staggered or equal temperatures, the wire then taking a temperature according to curve 96, for example. In can also maintain lower temperatures, for example in case of prolonged stop of the carpet, then carry out a preheating before restarting.

Les différents moyens décrits précédemment peuvent être appliqués individuellement ou en combinaison selon les résultats que l'on souhaite obtenir. L'idée générale consiste à maîtriser la température et la circulation de l'air et de la vapeur dans des zones successives du parcours des fils, notamment pour créer un élévation progressive de la température des fils de manière à leur éviter un choc thermique, de sorte qu'un arrêt de la machine ne provoque plus une affinité tinctoriale différente sur les fils soumis à cet arrêt.The various means described above can be applied individually or in combination depending on the results that one wishes to obtain. The general idea consists in controlling the temperature and the circulation of air and steam in successive zones of the course of the wires, in particular to create a progressive rise in the temperature of the wires so as to avoid them a thermal shock, so that a stop of the machine no longer causes a different dye affinity on the wires subjected to this stop.

Cette méthode générale est illustrée par la figure 9 qui montre schématiquement une installation modulaire formée d'un nombre quelconque d'unités 100 juxtaposées le long du parcours du tapis 15 transportant les fils. Ces unités sont raccordées les unes aux autres par des éléments de jonction 101 comportant au moins une cloison transversale et un passage pour les fils et le tapis, soit sous forme d'un simple clapet, soit un sas autorisant le maintien d'une différence de pression entre les deux chambres qu'il sépare. Chaue unité 100 renferme une chambre équipée d'organes d'injection de vapeur et d'air, d'organes 102 pour faire circuler ces fluides dans la chambre, et d'organes de mesure de la température et éventuellement de la pression. Tous ces organes sont reliés à une commande centrale qui est programmée pour maintenir les paramètre de fonctionnement qui peuvent être différents dans chaque chambre. Ces paramètres comprennent par exemple la température, la pression, le débit et la température de vapeur injectée, le débit et la tempérarute d'air injecté, le régime du ventilateur. Bein entendu, la vitesse du tapis transporteur, la qualité et la quantité des fils, ainsi que d'autres paramètre, sont également pris en compte pour définir les valeurs de consigne dans la commande programmée.This general method is illustrated by FIG. 9 which schematically shows a modular installation formed by any number of units 100 juxtaposed along the path of the belt 15 transporting the wires. These units are connected to each other by junction elements 101 comprising at least one transverse partition and a passage for the wires and the carpet, either in the form of a simple valve, or an airlock allowing the maintenance of a difference in pressure between the two chambers it separates. Each unit 100 contains a chamber equipped with organs for injecting steam and air, organs 102 for circulating these fluids in the chamber, and organs for measuring the temperature and possibly the pressure. All these organs are linked to a central control which is programmed to maintain the operating parameters which may be different in each room. These parameters include, for example, temperature, pressure, flow rate and temperature of injected vapor, flow rate and temperature of injected air, fan speed. Of course, the speed of the conveyor belt, the quality and quantity of the wires, as well as other parameters, are also taken into account to define the set values in the programmed command.

On a représenté à titre d'exemple, sur la figure 9, les température T différentes que l'on peut obtenir le long du parcours des fils dans une telle installation. Les lignes horizontales en trait mixte représentent les valeurs de consigne de la température dans chaque unité 100 pour un fonctionnement continu. Dans ce cas, la température des fils est représentée par la courbe 110 en trait continu. Dans cet exemple, la température n'est maximale que dans deux unités 100d et 100e où s'effectue un vaporisage sous pression. Si par exemple le tapis transporteur 15 doit s'arrêter, la commande centrale de l'installation peut passer à d'autres valeurs de consigne et maintenir, notamment dans les diverses chambres des unités 100, des températures différentes qui maintiennent les fils aux températures indiquées par la courbe 111 en traits interrompus. La commande peut également faire remonter certaines de ces températures avant de remettre le tapis en marche.By way of example, FIG. 9 shows the temperatures T that can be obtained along the path of the wires in such an installation. The horizontal lines in dashed lines represent the temperature setpoints in each unit 100 for continuous operation. In this case, the temperature of the wires is represented by curve 110 in solid lines. In this example, the temperature is only maximum in two units 100d and 100e where pressure spraying is carried out. If for example the conveyor belt 15 has to stop, the central control of the installation can pass to other set values and maintain, in particular in the various chambers of the units 100, different temperatures which maintain the wires at the indicated temperatures by curve 111 in broken lines. The control can also raise some of these temperatures before restarting the carpet.

Claims (27)

  1. A continuous heat treatment process for textile threads, in which said threads, that are before deposited on a conveyor belt, are passed through an installation having several consecutive chambers which are adjacent to one another and which comprise at least one steaming chamber, characterized by causing a gradual increase in temperature of the threads upstream and/or downstream from the inlet of said steaming chamber (10), in order to decrease thermal shock sustained by said threads entering said chamber.
  2. A process according to claim 1, characterized by imposing a positive temperature gradient in the direction of movement of said conveyor belt (15) within an upstream cold chamber (11) adjacent to said inlet of said steaming chamber.
  3. A process according to claim 2, characterized by dividing said upstream cold chamber (11) into several compartments (70, 80) crossed successively by said threads, and by maintaining different temperatures conditions in said different compartments.
  4. A process according to claim 1, characterized by producing within steaming chamber (10) a positive temperature gradient in the direction of movement of said conveyor belt (15).
  5. A process according to claim 1, characterized by imposing a predetermined temperature gradient along at least a part of the conveyor belt course while maintaining, in several consecutive chambers or in consecutive compartments arranged in one or several chambers, respective temperatures which are different and gradually graduated.
  6. A process according to claim 5, characterized by withdrawing at least in the last compartment preceeding said steaming chamber air from top of an upper downstream part of said compartment, and by reinjecting said withdrawn air into bottom of an upstream part of said compartment.
  7. A process according to claim 6, characterized in that said air taken from top of said downstream part is heated or cooled by an exterior source before being reinjected in said bottom of said upstream part of the corresponding compartment.
  8. A process according to claim 7, characterized in that the air is heated by an input of steam or is cooled by an input of cool air.
  9. A process according to claim 4, characterized in that said temperature gradient is produced in said steaming chamber by protecting the threads (16) arranged on the conveyor belt (15) against a heat conveying flow of steam in an inlet zone of said steaming chamber (10).
  10. A process according to claim 4, characterized by producing said temperature gradient in said steaming chamber by reinjecting in a central zone of said chamber steam withdrawn from top of said downstream part of said chamber so as to cause mixing of said steam at least in said central zone.
  11. A continuous heat treatment installation for textile threads, in particular for thermofixation of said threads, comprising several consecutive chambers adjacent to one another including at least one steaming chamber (10, 100d, 100e), and at least one conveyor belt (15) on which said threads (16) are disposed and passed through said chambers, characterized by comprising means (28 to 39, 52 to 57, 60, 70 to 79, 80 to 85) for creating a gradual increase in the temperature of said threads upstream and/or downstream from an inlet of said steaming chamber (10) to thereby reduce thermal shock sustained by said threads (16) entering said chamber.
  12. An installation according to claim 11, comprising two cold chambers (11, 12) arranged on both sides of said steaming chamber (10), and two intermediate chambers (13, 14) localised on the one hand between said upstream cold chamber and said steaming chamber, and on the other hand between said steaming chamber and said downstream cold chamber, characterized in that said upstream cold chamber (11) has a length at least equal to that of said downstream cold chamber (12).
  13. An installation according to claim 12, characterized in that said upstream cold chamber (11) comprises at least two partitioned compartments (11a, 11b ; 80a, 80b, 80c), and in that at least the last compartment (11b, 80c) in the direction of movement of said conveyor belt (15) comprises means (57, 84) for raising the temperature of ambient air to a value greater than that of the other compartments.
  14. An installation according to claim 13, characterized in that said means for raising the temperature in the last compartment (11b) comprises a suction member (52) to suction air from top of said downstream part of said compartment and to discharge said air into bottom of said upstream part, and a heating element (57) arranged for elevating temperature of said air before reinjection thereof in said compartment.
  15. An installation according to caim 11, characterized by comprising, upstream from said steaming chamber, and upstream cold chamber (11) which contains at least two compartments (70, 80) arranged consecutively along and arround said conveyor belt (15), each compartment being equipped with means (71, 72, 81) for circulating a current of air, or of air and steam accross said conveyor belt and said threads, with means (74, 84, 85) for heating or cooling said air, and with control means (75, 76, 79′) for adjusting said temperature and/or said flow rate of air.
  16. An installation according to claim 15, characterized in that each of said compartments comprises a housing (70) incorporated in a respective closed circuit.
  17. An installation according to claim 15, characterized in that said means for heating air comprises a device (74, 75, 84) for injecting a measured quantity of steam in said current of air, and in that said means for cooling said air comprises a device (74, 75′, 85) for injecting a measured quantity of cool air.
  18. An installation according to claim 16, characterized in that said means for heating said air comprises at least one heating element having an electrical resistance (172) arranged in said respective closed circuit.
  19. An installation according to claim 16, characterized in that said upstream cold chamber (11) comprises a steam generating device (174) positioned outside said housings (70), which housings comprise orifices (177) for admitting steam.
  20. An installation to claim 11, characterized in that said steaming chamber (10) comprises in a zone close to the entry thereof, a tunnel (60) disposed along the path of said conveyor belt (15), said tunnel having wails designed for constituting a thermal screen for the transported thread.
  21. An installation according to claim 11, characterized in that said means for creating a temperature gradient in said steaming chamber comprises a suction member (29) for withdrawing steam from top of the downstream part of said chamber and for reinjecting it in bottom of a central zone, and a heating element (32) arranged for increasing temperature of said steam before reinjection thereof in said chamber.
  22. An installation according to claim 12, characterized in that it comprises a first conduit (33) arranged for connecting said two cold chambers (11, 12) to each other, and connected to a second feeding conduit (34) itself connected to a source of pressurized air, said second conduit being equipped with a valve (36) controlled by a first regulator (37) connected to at least two temperature probes (38, 38′) disposed respectively in the two intermediate chambers (13, 14), and to a pressure probe (39) disposed in said steaming chamber.
  23. An installation according to claim 22, characterized in that said first conduit opens into said upstream cold chamber (11) within a farthest upstream positioned compartment (11a).
  24. An installation according to claim 22, characterized in that said steaming housing comprises a temperature probe (27) connected to a second regulator (26) arranged to control a valve (25) mounted on a steam feeding conduit (22) of said steaming chamber (10), and in that said first and second regulators (37) and (26) are coupled to each other.
  25. An installation according to claim 11, characterized in that it comprises a modular series of consecutive units (100) each having a chamber equipped with mixing means (102) for circulating air and/or steam in said chamber, and adjusting means for maintaining a predetermined temperature in said chamber.
  26. An installation according to claim 25, characterized in that it comprises a centralized control arranged to control all said mixing means and adjusting means.
  27. An installation according to claim 25, characterized in that at least one (100d, 100e) of said units is arranged to contain pressurized steam.
EP88902493A 1987-03-06 1988-03-02 Process and installation for heat treatment of textile threads Expired - Lifetime EP0349563B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88902493T ATE80188T1 (en) 1987-03-06 1988-03-02 METHOD AND DEVICE FOR THE THERMAL TREATMENT OF TEXTILE YARN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703222 1987-03-06
FR8703222A FR2611755B1 (en) 1987-03-06 1987-03-06 PROCESS AND PLANT FOR THE HEAT TREATMENT OF TEXTILE THREADS, PARTICULARLY THERMOFIXATION

Publications (2)

Publication Number Publication Date
EP0349563A1 EP0349563A1 (en) 1990-01-10
EP0349563B1 true EP0349563B1 (en) 1992-09-02

Family

ID=9348780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88902493A Expired - Lifetime EP0349563B1 (en) 1987-03-06 1988-03-02 Process and installation for heat treatment of textile threads

Country Status (7)

Country Link
US (1) US5014380A (en)
EP (1) EP0349563B1 (en)
JP (1) JPH02502468A (en)
AT (1) ATE80188T1 (en)
DE (1) DE3874331T2 (en)
FR (1) FR2611755B1 (en)
WO (1) WO1988006653A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629106B1 (en) * 1988-03-25 1991-01-25 Superba Sa SEALING HEAD OF A CONTINUOUS STEAM TREATMENT ENCLOSURE OF TEXTILE THREADS
FR2650310B1 (en) * 1989-07-26 1992-02-28 Superba Sa CONTINUOUS HEAT TREATMENT PLANT FOR TEXTILE THREADS
FR2651805B1 (en) * 1989-09-14 1992-01-17 Superba Sa METHOD AND OVEN FOR DRYING CONTINUOUS TEXTILE THREADS.
DE3939823A1 (en) * 1989-12-01 1991-06-06 Hoerauf Michael Maschf DEVICE FOR REMOVING YARNS
US5134866A (en) * 1990-12-04 1992-08-04 Passap Knitting Machines, Inc. Apparatus for the thermal treatment of textile fibers
DE4415229B4 (en) * 1994-04-30 2010-08-26 Michael Hörauf Maschinenfabrik GmbH & Co. KG Process for the continuous heat treatment of yarn deposited in loops
EP0797698B1 (en) * 1995-10-16 1999-09-15 A. Monforts Textilmaschinen GmbH & Co Device for fixing dye in reactive dyeing
US7219516B2 (en) * 2002-05-17 2007-05-22 Bmb Enterprises, Inc. Heat setting machine with sealing head
US7543463B2 (en) * 2003-03-20 2009-06-09 Bmb Enterprises, Inc. Heat setting machine with sealing head
DE102006019503A1 (en) * 2006-04-26 2007-11-15 Veit Gmbh Tunnel finisher for treating textile workpieces as a flat finisher
DE102014011696A1 (en) * 2014-08-07 2016-02-11 Saurer Germany Gmbh & Co. Kg Apparatus for the thermal treatment of yarns
EP3492644A1 (en) 2017-12-04 2019-06-05 SUPERBA (Société par Actions Simplifiée) Heat distribution management device for treating wires
CN111816367A (en) * 2019-04-12 2020-10-23 斯帕有限公司 Thermal distribution management device for wire processing

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067602A (en) * 1960-09-24 1962-12-11 British Nylon Spinners Ltd Apparatus for the treatment of textile materials
US3213470A (en) * 1960-12-06 1965-10-26 Asahi Chemical Ind Method for the continuous treatment of textile bundles with pressure steam
JPS5231991B2 (en) * 1973-06-27 1977-08-18
JPS5136822A (en) * 1974-09-25 1976-03-27 Akai Electric FUIRUMUSOZOSOCHI
FR2307202A1 (en) * 1975-04-07 1976-11-05 Sogeme Seal between two chambers between which materials pass - through connector duct, is effected by injecting pressure fluid into duct
DE2921775A1 (en) * 1978-05-31 1979-12-13 Sando Iron Works Co PROCESS FOR CONTINUOUS WET TREATMENT OF TEXTILE PRODUCTS AND DEVICE FOR CARRYING OUT THE PROCESS
FR2453928A1 (en) * 1979-04-11 1980-11-07 Superba Ets Textile yarn heat treatment appts. - has a pre-steaming chamber and a steam chamber, with cooling chambers and locks disposed between them
FR2453927A1 (en) * 1979-04-11 1980-11-07 Superba Sa Heat treatment appts. for textile yarns - has steam chamber with cooling chambers either side at greater pressure, to minimise steam leaks
FR2478150A1 (en) * 1980-03-12 1981-09-18 Superba Sa Steam treatment chamber for yarns - has homogeneous ambient atmosphere
JPS6039470A (en) * 1983-08-10 1985-03-01 株式会社高分子加工研究所 Continuous fiber heat method and apparatus
DE3418942A1 (en) * 1984-05-22 1985-11-28 Bayer Ag, 5090 Leverkusen METHOD AND DEVICE FOR CONDITIONING SYNTHESIS FIBER MATERIAL
FR2596079B1 (en) * 1986-03-18 1988-05-20 Superba Sa PROCESS AND DEVICE FOR TREATING TEXTILE THREADS AND MORE PARTICULARLY THERMOFIXING THESE THREADS

Also Published As

Publication number Publication date
FR2611755B1 (en) 1990-04-13
EP0349563A1 (en) 1990-01-10
US5014380A (en) 1991-05-14
DE3874331D1 (en) 1992-10-08
ATE80188T1 (en) 1992-09-15
DE3874331T2 (en) 1993-01-21
FR2611755A1 (en) 1988-09-09
JPH02502468A (en) 1990-08-09
WO1988006653A1 (en) 1988-09-07

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