WO2019116409A1

WO2019116409A1 - System for the treatment of a plurality of yarns

Info

Publication number: WO2019116409A1
Application number: PCT/IT2018/050244
Authority: WO
Inventors: Attilio FRESCURA
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-14
Filing date: 2018-12-13
Publication date: 2019-06-20
Anticipated expiration: 2020-06-14

Abstract

It is described a system for the treatment of a plurality of yarns, comprising at least one treatment device (DT), a series of runners of a first path section (1) inside the treatment device (DT), a series of runners of a second path section (2) outside the treatment device (DT), the first and the second path section (1), (2) adapted to form an annular path. The system comprises at least one further treatment device (DT'), a series of runners of a third path section (3) inside such at least one further treatment device (DT'), a series of runners of a fourth path section (4) outside such at least one further processing device (DT'), the third and the fourth section of path (3), (4) adapted to form an annular path superimposed and out of phase with respect to the annular path of the first and the second path sections (1), (2).

Description

SYSTEM FOR THE TREATMENT OF A PLURALITY OF YARNS

Field of Application

[0001] The present invention relates to a system for the treatment of a plurality of yarns.

[0002] In general, the present invention relates to general dyeing processes of solid macromolecular substances using dyes, for example, the indigo.

[0003] In particular, the present invention refers to the passage of yarns or

filaments through liquids, gases or vapors for carrying out a treatment for example, washing, dyeing, bleaching, impregnation.

[0004] The processes for the continuous dyeing of a warp chain with indigo dyes or other reduction dyes may be classified as: open multi-tank, slasher, with the dyed warp chain in a series of tanks and in line sizing; tank in open loop, with the warp chain dyed several times in a single tank and in line sizing; and multi-tank in rope form, with a defined number of yarns to form the cords required to feed the dyeing line, the cords reeled off after dyeing and drying.

[0005] In all open processes, the yarn to be dyed is prepared by a warping

machine on a series of beams loaded on a creel located at the inlet of the line of dyeing and simultaneously unwound to form the warp chain to be subjected to a process of dyeing.

[0006] Generally, the following elements are used to perform the sequence of the steps of the open processes: creel of unwinding of the beams; wetting tank for activities such as soding, laying / bottoming, aeration / airing, steaming, etc.; washing tanks and dyeing preparation; dyeing tanks with oxidation; post dyeing and washing tanks for activities such as coating/topping, chemical oxidation, fixation, etc.

[0007] In particular, the nature of the dye in the processes for the continuous

dyeing of a warp chain with indigo necessarily involves the repetition for different times of a cycle comprising a step of impregnating the yarn by a dyeing bath, a pressing step of the yarn and an oxidation step. [0008] Therefore, there is a need to improve efficiency by reducing the number of times the cycle is repeated and/or simplifying the way of carrying out one or more steps of the cycle.

[0009] Processes are known with steps in an inert environment, for example, in a nitrogen atmosphere allowing to improve the efficiency of the dye on the yarn, the dyeing, the strength dyes.

[0010] However, it is always difficult to reduce the number of times that it is

necessary to repeat the cycle, because of a poor affinity of indigo in contact with the yarn. In fact, in order to achieve very intense color tones and good solidity, several dives in the dyeing bath are necessary.

State of the art

[0011] The state of the art is given in US patent 4,416,124 A concerning a system for dyeing textile yarn in the form of a set of parallel filaments comprising: a dyeing device; first guides of the first section of a path entirely beneath the surface of the liquid dyeing bath; second guides of a second section of the path out of the tank through a treatment position of a gas, the first and the second section adapted to form an annular path; supply means for feeding the yarn from a position upstream of the first section of the path with respect to the direction of predetermined travel around the annular path; and actuating means for conducting the yarn in at least two separate passes around the annular path to allow in each pass both the contact of the yarn with the liquid dye bath and the passage of the yarn through the gas treatment position. Generally, these at least two passages are coplanar and are interlaced in the first section of path, while the second guides comprise two separate groups of second guides which allow to define two subsections separated secondary sub-section in the second path in sequence to allow the passage of the yarn. Generally, the annular path lies perpendicular to the array of filaments and parallel to the direction of the path. In particular, the second guides comprise deviation rollers arranged so that each step is of the same length.

Presentation of the invention [0012] Object of the present invention is solving the above prior art problems by providing a system for the treatment of a plurality of yarns by reducing the number of interactions of the yarn in a processing device.

[0013] A further object is that of eliminating the difficulties mainly due to the

reduced number of dyeing diving in the dyeing device by reducing the waste of warp yarn during the changes batch.

[0014] Another object is to allow to solve the problems of tensioning of the warp chain and of each yarn using a smaller number of passes to ring.

[0015] The above and other objects and advantages of the invention, as will

appear from the following description are achieved with a system for the treatment of a plurality of yarns such as that described in claim 1.

Preferred embodiments and non- trivial variations of the present invention are claimed in the dependent claims.

[0016] It is to be understood that all the claims form an integral part of the present description.

[0017] It will be immediately obvious to the skilled people in the art that could be performed to what has been described numerous variations and

modifications (for example related to shape, sizes, arrangements and parts with equivalent functionality) without departing from the scope of protection of the invention as appears from the enclosed claims.

Description of the drawings

[0018] The present invention will be better described by some preferred

embodiments thereof, given as a non-limiting example, with reference to the enclosed drawings, in which:

[0019] FIG. 1 shows a diagram of the arrangement of an embodiment of a

considerable portion of the system for the treatment of a plurality of yarns according to the present invention;

[0020] FIG. 2 shows a flow scheme of a first variant of an embodiment of the

system for the treatment of a plurality of yarns according to the present invention; [0021] FIG. 3 shows a flow diagram of a second variant of an embodiment of the system for the treatment of a plurality of yarns according to the present invention;

[0022] FIG. 4 shows a diagram of the arrangement of an embodiment of a further relevant part of the system of FIG. 2;

[0023] Fig. 5 shows a diagram of the arrangement of an embodiment of a further relevant part of the system of FIG. 3;

[0024] Fig. 6 shows a flow diagram of a modular solution of FIG. 2; and

[0025] FIG. 7 shows a flow diagram of a modular solution of FIG. 3.

Description of embodiments

[0026] With reference to FIGS. 1 , 4, 5, it is possible to note that a system for the treatment of a plurality of yarns comprises at least one treatment device DT, a series of runners of a first path section 1 inside the treatment device DT, a series of runners of a second path section 2 outside the treatment device DT, the first and the second path section 1 , 2 adapted to form an annular path, infeeding means B to feed the plurality of yarns from a location upstream of the first path section 1 with respect to a

predetermined travel direction about the annular path, actuating means D for accumulating the yarns downstream of the exit from the annular path and distributed actuating means along the path for conducting the yarns in at least two separate passages around the annular path to allow in each passage a treatment of the yarns in the treatment device DT.

[0027] Advantageously, the system comprises at least a further treatment device DT', a series of runners of a third path section 3 inside said at least one further treatment device DT', a series of runners of a fourth path section 4 outside the at least one further processing apparatus DT'.

[0028] In particular, the third and the fourth section of path 3, 4 adapted to form an annular path superimposed and out of phase with respect to the annular path of the first and the second path sections 1 , 2, so that the second path section 2 can be divided into an upper subsection 21 and a lower subsection 22 and the fourth path section 4 into a lower subsection 41 and a upper subsection 42. [0029] The upper subsections 21 , 42 are mutually superimposed and coincident.

[0030] In the same way, the lower subsections 41 , 22 are mutually superimposed and coincident.

[0031] In this way is formed an annular path consisting of: the first path section 1 ; a series of runners of the upper subsections 21 , 42; the third path section 3; and a series of runners of the lower subsections 41 , 22.

[0032] The treatment device DT and such at least one further treatment device DT' refer to the dyeing of a set of warp yarns by means of dyeing bath in open tank or in an integrated module.

[0033] According to a preferred configuration, the system for the treatment of a plurality of yarns comprises the infeeding means B formed by a beam carrier creel, a first series of tanks V 1 , V2 for the wetting, the washing and the vaporization, the at least one treatment device DT, a series of runners of the upper subsections 21 , 42, the at least one further treatment device DT', and a series of runners of the lower subsections 41 , 22.

[0034] The upper subsections 21 , 42 and the lower subsections 41 , 22 constitute respectively a first and a second oxidation group OS, Ol. With reference to FIGS. 2, 4, this second oxidation group Ol is connected to a second series of tanks V3, V4 arranged in sequence for the wetting the washing and the steaming, to a sizing station and to the drive means D for accumulating the yarns.

[0035] With reference to FIGS. 3, 5, the third path section 3 is connected to an oxidation group O, to a second series of tanks V3, V4 arranged in sequence for the wetting, the washing and the steaming, to a sizing station and to the actuating means D for accumulating the yarn.

[0036] With reference to FIGS. 6, 7, a modular solution of the system comprises a multitude of dyeing devices suitable for forming a battery of dyeing devices in the region of such at least one treatment device DT and/or a battery of dyeing devices in the region of such at least one further processing device DT'.

Examples [0037] The system for the treatment of a plurality of yarns, object of the present invention, allows to realize a constructively economical system, to reduce the production costs, to save energy, to reduce the waste yarn at batch changes.

[0038] The arrangement of the system apparatuses guarantees a warp-cycle

drawing-in in a simple way, of reduced length, free of tensions and able to maintain the natural elasticity of the yarn.

[0039] The system for the treatment of a plurality of yarns, object of the present invention, constitutes a synthesis of both the multi-tank and single-tank technologies currently used.

[0040] In fact, the single tank technology is simplified, thanks to the ring drawing in with a reduced travel compared to the state of the art. A first advantage is that of allowing to solve the problems of tensioning the warp chain and of each yarn by using a smaller number of ring passages.

[0041] A further advantage is that of eliminating dyeing difficulties due above all to the reduced number of immersions, reducing the unnecessary waste of warp yarn at batch changes.

[0042] Multi-tank technology is simplified, thanks to the reduction in the number of dyeing tanks without necessarily having to run more than one ring passage. Furthermore, the reduction in the number of tanks allows energy savings, a lower consumption of yarn and a reduction in yarn waste at batch change.

[0043] A further advantage is that it can squeeze a larger number of yarns, which means a more compact layer which contributes to increase the squeezing efficiency after each immersion in the color bath, increasing the dyeing efficiency.

[0044] A further advantage bound to the two mentioned technologies is that of having a system free of specific accessories used in the state of the art, for example, ring tensioner, movable cylinders, used for the handling of the ring drawing-in and necessary in the single tank line.

[0045] The system for the treatment of a plurality of yarns, object of the present invention allows to radically change the sequence of the devices and apparatuses and to change the position of the components of the system in a very significant way, consequently varying the logic of use.

[0046] In the line new idea the elements are installed in the following order:

dyeing tank (one or more); washing tanks and dyeing preparation tanks; creel for unwinding beams; dyeing tank (one or more); washing tanks.

[0047] This new system allows the warp chain to be spun, making more

immersions possible in the same dyeing units with much shorter travels, reducing the number of necessary tanks, eliminating the drawbacks of very long drawing in.

[0048] The need to adopt this solution rises from the need to make the most of new technologies and in particular those which use an inert environment for dyeing indigo or other reduction dye means.

[0049] Furthermore, the DT and DT' treatment devices are specular with respect to the feeding means B.

[0050] In the DT and DT' treatment devices, the same bath is present, whose flow is adjusted by means of flow-sensors.

[0051] The system employs warp yarn deviation means without needing any mobile guide.

Claims

Claim 1. System for the treatment of a plurality of yarns, comprising at least one treatment device (DT), a series of runners of a first path section (1) inside the treatment device (DT), a series of runners of a second path section (2) outside the treatment device (DT), said first and second path section (1), (2) adapted to form an annular path, infeeding means (B) to feed the plurality of yarns from a location upstream of the first path section (1) with respect to a predetermined travel direction about the annular path, actuating means (D) for accumulating the yarns downstream of the exit from the annular path and distributed actuating means along the path for conducting the yarns in at least two separate passages around the annular path to allow in each passage a treatment of the yarns in the treatment device (DT), characterized in that it comprises at least one further treatment device (DT'), a series of runners of a third path section (3) inside said at least one further treatment device (DT'), a series of runners of a fourth path section (4) outside said at least one further processing device (DT'), said third and fourth section of path (3), (4) adapted to form an annular path superimposed and out of phase with respect to the annular path of said first and second path sections (1), (2), so that the second path section (2) can be divided into an upper subsection (21) and a lower subsection (22) and the fourth path section (4) into a lower subsection (41) and a upper subsection (42).

Claim 2. System for the treatment of a plurality of yarns according to the

previous claim, characterized in that said upper subsections (21), (42) are mutually superimposed and coincident and said lower subsections (41), (22) are mutually superimposed and coinciding in order to form an annular path consisting of said first path section (1), a series of runners of said upper subsections (21), (42), said third path section (3) and a series of runners of said lower subsections (41), (22).

Claim 3. System for the treatment of a plurality of yarns according to one of the preceding claims, characterized in that said at least one treatment device (DT) and said at least one further treatment device (DT') refer to the dyeing of a set of warp yarns by means of dyeing bath in open tank or in a combined module.

Claim 4. System for the treatment of a plurality of yarns according to the

previous claim, characterized in that it comprises the infeeding means (B) formed by a beam carrier creel, a first series of tanks (V1), (V 2) for the wetting, the washing and the vaporisation, said at least one treatment device (DT), a series of runners of said upper subsections (21), (42), said at least one further treatment device (DT') and a series of runners of said lower subsections (41 ), (22).

Claim 5. System for the treatment of a plurality of yarns according to one of the previous claims, characterized in that said upper subsections (21), (42) and said lower subsections (41), (22) respectively constitute a first and a second oxidation group (OS), (Ol).

Claim 6. System for the treatment of a plurality of yarns according to the

previous claim, characterized in that said second oxidation group (Ol) is connected to a second series of tanks (V3), (V4) arranged in sequence for the wetting, the washing and the steaming, to a sizing station and to said drive means (D) for accumulating the yarns.

Claim 7. System for processing a plurality of yarns according to claim 5,

characterized in that said third path section (3) is connected to an oxidation group (O), to a second series of tanks (V3), (V4) arranged in sequence for the wetting, the washing and the steaming, to a sizing station and to said actuating means (D) for accumulating the yarns.

Claim 8. System for the treatment of a plurality of yarns according to one of the preceding claims, characterized in that it comprises a multitude of dyeing devices suitable for forming a battery of dyeing devices in the region of said at least one treatment device (DT) and/or a battery of dyeing devices in the region of said at least one further processing device (DT').