TW201712174A - Method and device for the production of a slub yarn, and yarn produced - Google Patents

Abstract

The device (1) comprises: a first drafting and false-twist texturing unit (2A); a second drafting and false-twist texturing unit (2B); a first slubbing unit (25); a second slubbing unit (27); an interlacing jet (31) for joining a first yarn (F1), a second yarn (F2) and a core yarn (FE) together, arranged downstream of the first slubbing unit (25) and of the second slubbing unit (27).

Description

Method and device for producing slub yarn and yarn manufactured thereby

The present invention relates to the field of yarn manufacturing. More specifically, the specific examples described herein relate to improvements in methods and apparatus for making slub yarns.

In the textile industry, new yarns are continuously developed in order to achieve specific technical and aesthetic effects. In textile technology, it is known to produce so-called "rough knot" fancy yarns which are stacked areas (i.e., irregular in thickness) are provided by means of suitable woollen devices or units. The woollen device is disclosed, for example, in EP 0291131, US Pat. No. 6,820,405, US Pat.

Typically, the previously deformed slub yarn is coupled to the elastomer yarn to obtain a composite fancy yarn.

There is still a need to develop thick fancy yarns of better quality and suitable for imparting innovative features to woven or woven fabrics made from such yarns.

According to a first aspect, the invention relates to a method for producing a fancy yarn. In the specific examples described herein, the method includes the steps of supplying and processing the first yarn by means of a drafting and false twist forming process. The method additionally includes the step of supplying and processing the second yarn by means of a drafting and false twist forming process. The first yarn that is drawn and deformed is then supplied to the first roving unit In order to form a stacked or thickened area on the first yarn. Similarly, the drawn and deformed second yarn is fed to the second roving unit to form a stacked or thickened region on the second yarn. Subsequently, the first yarn, the second yarn and the core yarn are joined together to form a fancy yarn. In an advantageous embodiment, the joining of the three components (the first coarse yarn, the second coarse yarn and the core yarn) is carried out in a single joining device. The engagement device can be or can include an air interlacing nozzle.

According to another aspect, the present invention is directed to an apparatus for manufacturing a slub yarn comprising, in combination, a first drafting and false twist forming unit for treating a first yarn by means of drafting and false twist deformation, and The second drafting and false twist deformation unit of the second yarn is processed by means of drafting and false twist deformation. The apparatus includes, downstream of the drafting and false twisting unit, a first woollen unit for the drawn and deformed first yarn and a second woollen unit for drawing and deforming the second yarn. An engaging means for joining the first yarn and the second yarn is provided downstream of the first roving unit and the second roving unit, and the core yarn is also supplied to the apparatus.

According to another aspect, the present invention is directed to a fancy yarn comprising, in combination, a core spun yarn joined together, a first stretched textured slub yarn, and a second stretched textured slub yarn.

The invention and the advantages obtained from the present invention will be better understood from the following description of the specific examples illustrated in the accompanying drawings in which: FIG. 1 shows a functional diagram of a specific example of the method described herein; 2A shows a section of a machine including a plurality of devices according to a specific example; FIG. 2B is an enlarged view of a portion of FIG. 2A; FIG. 3 is a schematic view of a specific example of a roving unit; 4A to 4D are diagrams showing the operation sequence of the woollen unit of Fig. 3; Fig. 5 is a schematic view showing different specific examples of the woollen unit; Fig. 6 is a view showing a thick yarn according to the prior art method; and Fig. 7 is shown according to the present invention. A picture of the slub yarn produced by the method described.

The following embodiments of the exemplary embodiments are described with reference to the accompanying drawings. The same reference numbers in different figures identify the same or similar elements. In addition, the drawings are not necessarily to scale. In addition, the following embodiments do not limit the invention. The scope of protection of the present invention is defined by the scope of the accompanying claims.

In the description, reference to "a particular embodiment" or "the embodiment" or "the embodiment" The statements in the description are "in a particular embodiment" or "in the particular embodiment" or "in a particular embodiment" and are therefore not necessarily referring to the same or the same. Particular features, structures or elements may additionally be combined in any suitable manner in one or more specific examples.

Figure 1 shows a functional diagram of some specific examples of the methods described in the present invention. For the manufacture of the composite fancy yarn FF, two starting yarns F1 and F2 are used. The yarns F1 and F2 can be supplied by the spinning carts B1 and B2, which are gradually unwound to supply the yarns F1 and F2 to the processing unit of the apparatus indicated generally by the numeral 1 in the drawing of Fig. 1.

In some embodiments, each of the yarns F1 and F2 is subjected to preliminary drafting and false twist deformation in section 3 of the machine. The first draft and false twist deformation unit indicated by 2A is provided for the first yarn F1 in the section 3. The second drafting and false twisting unit indicated by 2B is also provided for the zone Yarn F2 in paragraph 3.

In some embodiments, in order to perform drafting and false twist deformation, the first yarn F1 is fed through the first supply unit 5, the oven or heater 7, the cooling zone 9, the false twist unit 11, and finally through the second supply unit. 13.

Similarly, the second yarn F2 can be fed through the respective first supply unit 15, the second oven or heater 17, the second cooling zone 19, the second false twist unit 21, and finally introduced to the respective second supply. In unit 23.

In the diagram of Figure 1, the two ovens 7 and 17 are integrated into a single heating unit indicated generally by the numeral 8.

In a known manner, the yarn F1 can be drawn between the supply unit 5 and the supply unit 13. Each of the supply units 5 and 13 may include a pair of rollers adjacent to each other and pressed against each other to define a nip point through which the yarn F1 passes. At least one of the rolls of each of the supply units 5, 13 can be motorized while the other can be left idle. The circumferential rotational speed of the rollers of the supply units 5 and 13 is thus selected to impart to the yarn F1 the desired draft of the draft and false twist deformation section 3. For example, the supply unit 13 can be actuated by a peripheral speed greater than the speed of the supply unit 5 to a percentage of the roller comprised between 1.1 and 2.0.

Similarly, the yarn F2 can be drawn in the drafting and false twist deformation section 3 between the supply unit 15 and the supply unit 23. The supply units 15 and 23 can be configured in a manner similar to the units 5 and 13. In some embodiments, the motorized rolls of supply units 5 and 15 can be mounted on a common shaft controlled by a single motor. In other embodiments, the supply units 5 and 15 can be associated with different motors to impart different degrees of draw to the yarns F1 and F2. Similarly, the supply units 13 and 23 may have motorized rollers mounted on the same rotating shaft and controlled by a single motor, or by different horses. A roller that is actuated to adjust the draft of the two yarns F1 and F2 independently of each other.

Downstream of the drafting and false twist deformation section 3, the apparatus 1 has a first roving unit 25 disposed along the path of the first yarn F1 and a second roving unit 27 disposed along the path of the second yarn F2.

The two roving units 25 and 27 can be designed, for example, in a known manner as described in the patent documents mentioned in the introduction section of the present description. Another specific example of the roving unit 25 or 27 will be described below with reference to FIG.

In a suitable position, for example, in or downstream of the region of the roving units 25, 27, an unwinding table 29 can be provided for unwinding the spinning car BE of the elastomeric yarn FE, which is intended to form a composite Fancy yarn FF core yarn. The elastomeric yarn FE can be made of, for example, Lycra® or any other suitable material.

The supply paths of the yarns F1 and F2 and the elastomer yarn FE are combined in the joining device for joining the yarns F1, F2 and the elastomer yarn FE. In some embodiments, the engagement device 31 comprises or consists of an air interlacing nozzle 31. In the air interlacing nozzle 31, the yarns F1, F2 and the elastomer yarn FE are joined together by means of pressurized air jetting to obtain a composite fancy yarn FF at the outlet of the air interlacing nozzle 31, the combined fancy yarn FF roll The wrap yarn FF is fed to the collecting and winding station by means of a supply unit 35, which is similar to the units 5, 13 in a spinning cart BF in the collecting and winding station indicated schematically by 33. 15, 15 may comprise a pair of rollers adjacent to each other and against each other, at least one of which may be motorized and the other may be idle. The peripheral speed of the rollers of the supply unit 35 can be suitably controlled to further draw or loosen the fancy yarn FE before the fancy yarn FE is collected on the spinning cart BF. In some embodiments, the supply unit 35 can be replaced by a heated roller called a godet. In this way, the unit not only has It has a function of supplying and has the function of heat-curing fancy yarn FE. In some embodiments, the oil supply unit 37 can be configured along the path of the fancy yarn FE toward the collection shaker BF.

The composite fancy yarn FE thus comprises a core spun yarn composed of an elastomer yarn FE, and the two thick yarns F1 and F2 are joined to the elastomer yarn FE by means of an air interlacing nozzle 31.

The fancy yarns F1 and F2 are advantageously and preferably multifilament yarns, wherein the number of filaments is comprised between, for example, 10 and 288.

In some embodiments, yarns F1 and F2 have yarn counts comprised between 15 dtex and 550 dtex.

The two yarns F1 and F2 may be identical to each other in terms of yarn count and composition, or different from each other in yarn count and/or composition.

In some embodiments, the yarns F1 and F2 can be, independently of each other, a pre-oriented or partially oriented yarn (POY) or a fully drawn yarn (FDY). The two yarns F1 and F2 can be made independently of each other from polyamine (polyamide), polypropylene, polyester, polyethylene terephthalate or any other material, usually a polymeric material, such other materials. It can be used to make yarns for the textile industry intended for use in clothing, furniture, automobiles or any other textile application.

2A and 2B show a specific example of the apparatus according to the diagram of Fig. 1. The same numbers indicate the same or corresponding parts as those described with reference to FIG. More specifically, Figures 2A and 2B illustrate sections orthogonal to the longitudinal extension of the multi-function machine according to a vertical plane, the machine comprising a plurality of devices 1 aligned orthogonally to the plane of the figure.

The paths of the yarns F1 and f2 partially overlap with respect to the drafting and false twist deformation sections 3 in the images of Figs. 2A and 2B. In FIG. 2A, FIG. 2B, bonding in the heating unit 8 The ovens 7, 17, the cooling zones 9 and 19 and the false twist units 11 and 21 are shown overlapping each other. Downstream of the latter, the two paths of the yarns F1 and F2 are individually visible, wherein the supply units 13, 23, the roving units 25 and 27, and the individual interlacing nozzles 31 are used together for the yarns F1, F2 and are used together for the elastomer yarn FE And collectively for a single supply unit 35. Below this latter, two collection units 33 are instructed to place one above the other and correspond to two adjacent devices 1 configured according to the alignment of the machine orthogonal to the plane of the figure.

As mentioned above, the two roving units 25 and 27 can be designed in a known manner, for example as described in the patent documents mentioned in the preamble. Figure 3 illustrates a woollen unit according to another embodiment. In this particular example, the roving units 25, 27 are included for each device 1 (i.e., for each position of the multi-position machine of Figure 2) for guiding the individual yarns F1 or F2 through a pair Components 41, 43. The two guiding members 41 and 43 are preferably fixed with respect to the structure of the device 1. A wire guide 45 is disposed between them, and the wire guide 45 is movable by reciprocation according to the double arrow f45. For this purpose, the wire guide 45 can be connected to a toothed belt 47 that can be driven to reciprocate by means of the motor 49.

The wire guide 45 moves along a path that is a straight line in the illustrated example from the starting position shown in Figure 3 to the final position, wherein the slider 51 is configured to be stationary with respect to the load bearing structure. The wire guide 45 at the position illustrated in Fig. 3 is engaged with the yarn F1 or F2 guided along the guiding members 41 and 43, and moves the yarn F1 or F2 in translation about its position toward the slider 51. By interacting with this latter, the yarn is unloaded from the wire guide 45 and returned to the linear configuration between the two guiding members 41 and 43. The wire guide 45 moves back to the starting position of Figure 3, where the wire guide 45 picks up the yarn and deflects its path up to the slider 51 as described above.

This operation is schematically illustrated in the sequence of Figures 4A through 4D.

The periodic elongation of the yarn path between the guiding members 41 and 43 and the subsequent release of the yarn cause the formation of yarn deposits, thus producing a thick knot effect.

Figure 5 illustrates different specific examples of the roving units 25, 27. In this particular example, the roving units 25, 27 are included for each device 1 (i.e., for each position of the multi-position machine of Figure 2) for guiding the individual yarns F1 or F2 through a pair Components 41, 43. The two guiding members 41 and 43 are preferably stationary with respect to the structure of the device 1. A wire guide 45 is disposed between the two guiding members 41 and 43, and the wire guide is movable in accordance with the reciprocating motion of the double arrow f45. For this purpose, the wire guide 45 can be coupled to a toothed belt that can be driven to reciprocate by means of an electric motor, similar to what has been described with reference to FIG. The wire guide 45 is symmetrical about a vertical plane and functions in conjunction with two sliders 51A, 51B disposed at the end of the stroke of the wire guide 45.

In this case, the operation of the roving unit is substantially the same as that of the roving unit of Fig. 3. However, in this case, the wire guide 45 performs a larger stroke in both directions according to the arrow f45 so as to alternately interact with the two opposing sliders 51A and 51B.

By using a double roving unit as illustrated by the example in Fig. 5, the textured yarn passing through the roving unit is more tightly tightened and thus stiffer, and this situation can produce better end results.

Two identical or different roving units 25, 27 can be used in the device 1. For example, the roving unit can be made as shown in Figure 3, and other roving units can be made as shown in Figure 5.

Further, the roving units 25, 27 can be controlled in the same manner or differently from each other. In particular, the movement of the wire guide 45 or any other movable roving element can be used. Operate two woollen units at the same rate or at different rates. By adjusting the positions of the sliders 51, 51A, 51B with respect to the positions of the guide members 41, 43, it is also possible to vary the stroke of the wire guide 45 and thus the number of stacked yarns.

Therefore, it is possible to independently adjust the rate at which the deposits are distributed onto the yarn for two yarns F1 and F2 (depending on the operating rate of the roving unit), the number of each deposit (depending on the stroke of the wire guide 45) or both These parameters.

By varying the operating parameters of the two roving units 25, 27, it is possible to have a wide range of different fancy yarns FF.

Similar adjustments can be made to different roving units designed, for example, as described in the prior art documents cited above.

Different final fancy yarn products can also be obtained by changing the yarns F1 and F2. For example, the yarns may be identical to each other or may be different from one another, taking into account the number of yarn counts, the number of filaments, and/or the material. Yarns F1 and F2 may also differ in the physical characteristics imparted during the drafting and false twist forming process. For example, the two yarns F1 and F2 can be subjected to different draft percentages and/or different deformation temperatures and/or different twists.

By using different yarns that have different behaviors during dyeing, it is possible to obtain a specific color effect.

In general, a wide range of thick knot effects of the final fancy yarn can thus be obtained by the apparatus and methods described herein, and thus achieve high product flexibility.

The joining of the elastomeric yarn FE and the two yarns F1 and F2 of the deformed and roving fibers in the same interwoven nozzle in the individual roving units 25, 27 surprisingly allows the specific effect of the final fancy yarn FF to be obtained. Figure 6 shows a picture of a slub yarn obtained according to the prior art method, wherein a single warp The deformed and roving yarns are joined to the elastomer yarn. The fancy yarn thus obtained has a discontinuity of the yarn deposit separated from each other by the region free of deposits. The product is a limited yarn volume and of poor quality.

Figure 7 shows a picture of a fancy yarn FF obtained by the method described above. Fancy yarns having a larger volume and better quality are obtained by joining the two yarns of the deformed and roving in the same interlacing nozzle, wherein it is possible to operate, for example, by two roving units 25, 27 The rate changes to vary the distribution of yarn deposits.

The two yarns F1, F2 treated separately in the roving units 25, 27 interact with each other in the interlacing nozzle, thus producing a synergistic thickening effect on the finished yarn FF.

Although the specific embodiments of the invention described above have been shown in the drawings and are fully described in the above description, wherein the features and characteristics are related to different example embodiments, those skilled in the art will understand, modify, change And omissions may be made without departing from the innovative knowledge, principles, and concepts described above and the advantages of the objects described in the accompanying claims. Therefore, the scope of the described improvements should be determined only by the broadest interpretation of the scope of the appended claims, so that all modifications, changes and omissions are included. In addition, the order or sequence of any steps of a method or process may be varied according to alternative embodiments.

Claims (24)

A method for manufacturing a fancy yarn (FF) comprising the steps of: supplying and processing a first yarn (F1) by means of a drafting and false twist forming process; deforming by means of a draft and false twist a process for supplying and processing a second yarn (F2); feeding the drawn and deformed first yarn (F1) to a first roving unit (25), and forming a stack on the first yarn (F1) a region or a thickened region; supplying the second yarn (F2) that is drafted and deformed to a second roving unit (27), and forming a stacked region or a thickened region on the second yarn (F2); The first yarn (F1), the second yarn (F2) and a core yarn (FE) are joined together. The method of claim 1, wherein the core spun yarn (FE) is an elastomer yarn. The method of claim 1, wherein the first yarn (F1), the second yarn (F2) and the core yarn (FE) are joined together in an air interlacing nozzle (31). The method of claim 2, wherein the first yarn (F1), the second yarn (F2) and the core yarn (FE) are joined together in an air interlacing nozzle (31). The method of claim 1, wherein the first yarn (F1) is a multifilament yarn. The method of claim 2, wherein the first yarn (F1) is a multifilament yarn. The method of claim 1, wherein the second yarn (F2) is a multifilament yarn. The method of any one of claims 2 to 5, wherein the second yarn (F2) is a multifilament yarn. The method of any one of claims 1 to 5, wherein the first yarn (F1) and the second yarn (F2) are comprised between 15 and 550 dtex. one of Yarn branch. The method of any one of claims 1 to 5, wherein the first yarn (F1) and the second yarn (F2) are identical to each other. The method of any one of claims 1 to 5, wherein the first yarn (F1) and the second yarn (F2) are different from each other. The method of claim 11, wherein the first yarn (F1) and the second yarn (F2) differ in one or more of the following characteristics: yarn material, yarn count, number of yarns, Yarn draft, yarn deformation, yarn twist. The method of any one of the preceding claims, wherein the first yarn (F1) and the second yarn (F2) are processed by means of different roving processes to produce Different thick sections are preferably thick sections with different frequencies and/or accumulations. A device (1) for manufacturing a fancy yarn (FF) comprising, in combination, a first drafting and false twisting deformation unit (2A); a second drafting and false twisting deformation unit (2B) a first roving unit (25); a second roving unit (27); for passing a first yarn (F1) through the first drafting and false twisting unit (2A) and through the first roving unit (25) one path; a path for passing a second yarn (F2) through the second drafting and false twisting unit (2B) and passing through the second woollen unit (27); for supplying a package One of the core yarns (FE); an engagement device (31) for the first yarn (F1), the second yarn (F2), and the core The yarns (FE) are joined together, disposed downstream of the first woollen unit (25) and downstream of the second woollen unit (27). The device of claim 14, wherein the engaging device (31) comprises an air interlacing nozzle. The device of claim 14, wherein at least one of the first roving unit (25) and the second roving unit (27) and preferably both of the roving units have The roving unit can preferably be independently adjusted for at least one operational parameter. The device of claim 15 wherein at least one of the first roving unit (25) and the second roving unit (27) and preferably both of the roving units have The roving unit can preferably be independently adjusted for at least one operational parameter. The apparatus of claim 16 or 17, wherein the at least one woollen parameter is selected from the group consisting of a roving frequency, a yarn sizing amount. A fancy yarn (FF) comprising, in combination, a core yarn (FE) joined together, a first yarn which is drawn, deformed and roving, and a second yarn which is drawn, deformed and roving (F2 ). A fancy yarn according to claim 19, wherein the core spun yarn (FE) is an elastomer yarn. A fancy yarn according to claim 19, wherein the first yarn (F1) which is drawn, deformed and roving is a multifilament yarn. A fancy yarn according to claim 20, wherein the first yarn (F1) which is drawn, deformed and roving is a multifilament yarn. The fancy yarn of any one of clauses 19 to 22, wherein the second yarn (F2) which is drawn, deformed and roving is a multifilament yarn. A fancy yarn according to any one of the preceding claims, wherein the first yarn (F1) and the second yarn (F2) are different from each other in one or more of the following parameters: yarn Material, yarn count, number of filaments, degree of deformation, drafting degree, twist, yarn thickness, yarn thickness.