EP0943718B1 - Dye applicator for applying dye to moving yarns - Google Patents

Description

The present invention relates to the field of the textile industry, in particularly the treatment of threads, in particular by dyeing threads and has as its object a dye coating head by bath deposition on moving threads.

Textile threads generally undergo, before their use, especially for weaving, washing and / or bleaching treatments as well than dye.

To this end, the dyeing is carried out in particular by wet method. by means of machines with one or more coating heads, which are traversed by the threads of a layer of threads to be dyed. At the entrance to these, the wires require to be perfectly maintained and guided, in order to avoid any entanglement detrimental to proper operation, by means of holding devices and guide generally consisting of combs and possibly of fixed supports arranged upstream of each coating head, on the lateral face corresponding to said coating head.

The coating heads are in the form of boxes containing a spraying device and wire supports, these boxes being provided with a lateral opening for access to said internal spraying device and wire, closed by means of a removable door, and an external means of wire guide and support thereof, generally in the form of a comb fixedly mounted in front of a thread passage slot provided in the removable door.

Combs or other supports allow perfect wire guidance at the entry and in the coating heads, preventing any erratic displacement wires, such as vibrations causing jumps of wires which can have consequence a harmful intermingling of said threads.

In these known coating heads, the weaving of the plies of wires to dyeing is carried out by means of needles connected individually to each thread and successively threaded into the external guide means, or comb, then into the enclosure through the slot of the removable door, the support means and internal guide and a second exit slot provided on the face of the enclosure opposite the removable door.

To make it easier to wire the wires from a sheet of wires and to simplify access to the interior of the coating head, it has been proposed, by FR-A-2,748,756. a dye coating head by bath deposition on moving threads in the form of a box in two elements hinged together and opening on the front and provided with means for guiding and / or supporting the individual wires a sheet of wires, mounted on its upstream side face. view towards scrolling of the wires, with the possibility of transverse displacement relative to this direction.

These known coating heads are generally provided with a head spray or other spray means directing a jet of dye bath onto the threads running in the box, this coating head cooperating with a mobile disc-shaped shutter provided with at least one calibrated slot of passage of the dye for performing a stain impregnation commonly called "space dyeing", by cyclic interruption of the dye jet. A coating machine thus equipped is notably known from FR-A-2,719 058.

Machines fitted with these coating heads allow generally meet all quality requirements. However, their processing capacity is limited to a number of wires corresponding in width to ply formed to the maximum length of the slot (s) provided on the disc shutter, or substantially within the radius of said disc. As a result, increase in the quantity of threads to be treated is only possible by increase of the internal volume of the coating head for housing a disc larger shutter, therefore having more radial slots long. However, such a solution is not possible, for reasons obvious dimensions of the coating heads. which would result in a corresponding oversizing of the whole machine.

In addition, an increase in coating yield by increase in the scrolling speed is necessarily limited by the speed of penetration of the dye bath into the threads and fibers.

Also known, from FR-A-2 178 339. a device for the discontinuous dyeing of, textile yarn, in which a textile yarn, or each yarn of a sheet of textile threads, is moved under an oscillating nozzle. who thus deposits a stain of dye on said thread each time its jet crosses the path of the thread. Such a device is substantially comparable. as to the result obtained. to the one according to FR-A-2 719 058 and has the same drawbacks, namely, in particular. a yield limitation due to the prohibitive bulk of the device in case of increase in the width of the web of textile threads to be treated.

The object of the present invention is to overcome these drawbacks by proposing a dye coating head by bath deposition on moving threads allowing a significant increase in the width of the ply of yarns to be treated, without increasing the size of said coating head and, thus, a corresponding improvement in performance.

For this purpose, the dye coating head by bath deposition on threads in motion, in particular for a "space dyeing" type treatment, which is essentially constituted by a treatment enclosure provided, on at least one lateral face seen in the direction of movement of the wires, of a guide means and / or for supporting the individual threads of a sheet of threads, and containing a means application of dye cooperating with a means of cyclic interruption of the application of dye in the form of a mobile disc-shaped shutter or of a palette, is characterized in that the means for applying dye is advantageously at least split on the same axis in the direction perpendicular to the running of the wires and is formed by at least two nozzles, turbines or rotary plates for spraying a dye jet.

la figure 1 est une vue en élévation latérale et en coupe d'une tête d'enduction de teinture conforme à l'invention, en position de service ;

la figure 2 est une vue en élévation latérale de la tête en position de service, et

la figure 3 est une vue en plan de la tête.

The invention will be better understood from the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which:

Figure 1 is a side elevational view in section of a dye coating head according to the invention, in the service position;

FIG. 2 is a side elevation view of the head in the service position, and

Figure 3 is a plan view of the head.

Figures 1 to 3 of the accompanying drawings show a head dye coating by depositing bath on moving threads, in particular for a space dyeing treatment, which essentially consists of a treatment enclosure 1 provided, on at least one lateral face viewed towards the scrolling of the wires, of a means 2 for guiding and / or supporting the individual wires of a layer of threads, and containing a cooperating dye application means 3 with a means 4 for cyclic interruption of the application of dye in the form of a movable shutter in the form of a disc or a pallet.

In accordance with the invention, and as shown more particularly, by way of example, Figures 1 and 3 of the accompanying drawings, the advantage 3 of dye application is advantageously at least split on a same axis in a direction perpendicular to that of thread travel and is formed by at least two nozzles, turbines or rotary plates for spraying a dye jet. So, for the same size of the head of the treatment chamber 1, it is possible to simultaneously impregnate two layers of parallel wires, without modification of the means 4 for cyclic interruption of the application of dye.

Preferably, the treatment enclosure 1 is in the form a box in two elements hinged together around a horizontal axis 1 ' parallel to the axis of travel of the ply wires and opening on the front, the element advantageously being pivotable relative to the upper element 1, and the dye application means 3 is advantageously formed by at least two nozzles 3 '. turbines or rotary plates for spraying a dye jet. the way 4 of cyclic interruption of the dye application being a rotary means consisting of a disc extending in a plane parallel to that of the plies of wires and provided with at least two diametrically opposite radial slots.

According to an alternative embodiment of the invention, the means 4 cyclic interruption of the dye application may also be in the form a linear means for cutting or deflecting the dye bath, such as pallet or the like moved back and forth in front of said jet.

In order to carry out guidance, sheets of wires penetrating into the treatment enclosure 1, the means 2 for guiding and / or supporting the wires individual is advantageously subdivided into a number of sub-assemblies 2 ' equal to the number of nozzles 3 '. turbines or rotary plates for projecting a jet of dye and each allowing the guidance of a sheet of width equal to that jet from the 3 'turbine nozzle or corresponding rotary plate. So each ply of wires assigned to a 3 ′ nozzle is guided individually with respect to this last.

Preferably, the nozzles 3 ′, turbines, or rotary plates are arranged symmetrically to a vertical axis 4 'of support and drive in rotation of the disc forming the rotary means 4 for cyclic interruption of the application of tincture. This arrangement of the 3 'nozzles has the advantage of take advantage of the size of the disc forming the means 4, in the direction perpendicular to that of the thread running during treatment, without require any oversizing of enclosure 1 (Figures 1 and 3).

According to another characteristic of the invention, the guide means 2 and / or supporting the individual wires. subdivided into a number of 2 'subsets equal to the number of 3 'nozzles, turbines or rotary plates is advantageously mounted on the corresponding side face of enclosure 1 with the possibility of transverse movement relative to the direction of travel of the wires. These sub-assemblies 2 ′ can be rigidly connected to each other or be independent.

This method of mounting the means 2 for guiding and / or supporting the individual threads on the coating head and more particularly on the element upper component of enclosure 1, allows, after opening by pivoting towards the bottom of the lower element, to easily release the layers of wire guided in the sub-assemblies 2 ′ outside the enclosure 1 and the guides and support for wires, for example for an intervention such as knotting a broken thread or even making quickly an emptying of plies of son out of said enclosure. the envied tablecloth then being inserted into enclosure 1 and, in particular. in the guides and support of sons.

The subassemblies 2 'forming the means 2 for guiding and / or individual wire support are advantageously mounted on a device transverse guide 5 fixed on the enclosure 1 constituting the coating head, and in the form of combs or the like.

With a view to locking in the service position and possibly position for emptying, or other intervention, of the means 2 for guiding and / or support for a layer of wires, the latter is advantageously provided with a means stopping in position such as a cam or the like acting on the device transverse guide 5 under the action of a spring (not shown) and the unlocking is carried out by means of an operating lever 6.

The subassemblies 2 'forming the means 2 for guiding and / or support for individual wires of a web of wires can also be produced in the form of rotary combs consisting of separate disc stacks by spacers, the assemblies being clamped on shafts supported by through a nut and washers. So depending on the title or number metric of the guide wires, the spacing between the discs and their thickness can be modified, respectively by replacing the spacers with spacers thicker or thinner and by replacing the discs with more discs thick or thinner.

Such a rotary comb assembly allows the thread to run always removes previous deposits during its passage on said comb, so that it becomes self-cleaning. which is particularly interesting for working with wet yarn, as is the case when dyeing. avoiding agglomeration of wet fluff. As a result, risk of wire breakage following periodic flock detachment agglomerates can be largely avoided.

The constitution of the treatment enclosure 1. est. preferably in accordance with the embodiment described in FR-A-2,748,756, with a plan of joint of the lateral faces of the two elements hinged together constituting it situated at the level of the passage of the ply of wires and delimiting, on each lateral face, a passage slot for said ply of wires. This passage slot is made by through flat guides provided respectively on the upper element and the lower element and placed slightly behind the joint plane.

This constitution of the coating head into two separable elements by pivoting of one relative to the other and opening at the passage of the wire layer allows a quick and easy insertion of said wire layer into said coating head and in particular in the guides and support of wires provided for the inside of this box and intended, in particular, to maintain said wires for coating them with dye using 3 'spray nozzles or the like.

According to an alternative embodiment of the invention, not shown in annexed drawings, the enclosure 1 can advantageously be subdivided according to minus a vertical plane extending parallel to the direction of travel of the plies of threads through at least one vertical wall extending between the 3 'nozzles, turbines or rotary plates for spraying a dye jet, in the upper part of enclosure 1 up to immediate proximity of means 4 cyclic interruption of the application of dye, the lower part of the enclosure 1 with an individual container under each compartment thus delimited dye reception. Such an embodiment allows the application in a same enclosure 1 of several dye baths on different plies of yarns, but perfectly separated.

Thanks to the invention, it is possible to produce a coating head of bath dyeing on moving threads permitting impregnation of a maximum number of strands in a relatively large enclosure low and with the use of a rotary means 4 for cyclic interruption of applying existing dye, so that the yield of such a head relative to current heads of this type can be significantly improved, namely doubled, with equal dimensions.

Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications are still possible. in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (12)

1. A dye applicator for applying dye to moving yarns, especially for a process of the kind known as "space dyeing", constituted essentially by a treatment enclosure (1) provided, on at least one lateral face seen in the direction of movement of the yarn, with guide means (2) and/or support means for the individual yarns of a sheet of yarns, and containing dye applicator means (3) co-operating with interruption means (4) for interrupting cyclically the application of dye comprising a movable shutter in the form of a disc or palette, characterised in that the dye applicator means (3) is at least doubled along an axis in the direction perpendicular to that of the movement of the yarn and is formed by at least two nozzles, turbines or rotatable plates for projecting a jet of dye.
2. A dye applicator, according to claim 1, characterised in that the cyclic dye interruption means (4) is a rotatable means constituted by a disc extending in a plane parallel to that of the sheet of yarns and provided with at least two diametrically opposed radial slots.
3. A dye applicator according to claim 1, characterised in that the cyclic dye interruption means (4) is a linear gap means, or means for deflecting the dye coating, such as a palette or the like disposed for reciprocation in front of the said jet.
4. A dye applicator according to claim 1 characterised in that the means (2) for guiding and/or supporting the individual yarns is subdivided into a number of sub-assemblies (2') equal in number to the number of nozzles (3'), turbines or rotatable plates for projecting the jet of dye and each permitting the guiding of a sheet of width equal to that of the jet of the nozzle (3'), turbine or rotatable plate respectively.
5. A dye applicator, as claimed in either one of claims 1 and 2, characterised in that the nozzles (3'), turbine, or rotatable plates are disposed symmetrically about the vertical axis (4') of the support and of the rotational drive of the disc forming the rotating means (4) of cyclic interruption of the dye application.
6. A dye applicator as claimed in claim 1, characterised in that the means (2) for guiding and/or supporting the individual yarns is mounted on the corresponding lateral face of the enclosure (1) with the capability of relative lateral displacement in the direction of movement of the yarn.
7. A dye applicator as claimed in claim 6, characterised in that the sub-assemblies (2') are connected rigidly relative to each other.
8. A dye applicator as claimed in claim 6, characterised in that the sub-assemblies (2') are independent.
9. A dye applicator as claimed in any one of claims 4 and 8 to 10, characterised in that the sub-assemblies (2') forming the means (2) for guiding and/or supporting the individual yarns are mounted on a transverse guide device (5) fixed on the enclosure of the applicator, and comprise combs or the like.
10. A dye applicator as claimed in any one of claims 1 and 4, characterised in that the means (2) for guiding and/or supporting the sheets of yarns is provided with stop means in a position such that a cam or the like holds the transverse guide device (5) under the action of a spring and of which release is effected by the intermediary of an operating lever (6).
11. A dye applicator as claimed in any one of the claims 1, 4 and 6 to 9, characterised in that the sub-assemblies (2') forming the means (2) for guiding and/or supporting the individual yarns of a sheet of yarns are in the form of rotatable combs constituted by stacks of discs separated by distance-pieces, the assemblies being held on spindle shoulders by the intermediary of a nut and washers.
12. A dye applicator as claimed in any one of claims 1 to 3, characterised in that the enclosure is subdivided along at least a vertical plane extending parallel to the direction of movement of the sheet of yarns by the intermediary of at least one vertical wall extending between the nozzles (3'), turbines or rotatable plates for projecting the jet of dye, in the larger part of the enclosure (1) up to the immediate proximity of the means (4) for the cyclic interruption of the application of dye, the smaller part of the enclosure (1) presenting under each compartment thus delimited an individual trough for the reception of the dye.

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