KR19980069781A - Yarn treatment method and device - Google Patents

Abstract

The filaments of the false twist multifilament fabric yarn 14 are blended to increase cohesion and the residual torque in the yarn 14 is the yarn path through the ducts 2 and 13 in the cylinders 10 and 12. Decrease as advancing of yarn 14 along 11. Fluid flows (8, 9, 18) into the duct of the yarn path (11) centered relative to the fluid flow (8, 9, 18) to rotate the fluid around the yarn path to reduce residual torque and to hybridize the filaments. ) Heads. This is because the fluid flows 8, 9 face each other in the overlapping direction but diverge from one another or toward the base surface 17 of the duct 13 which is inclined and planar in the vertical of the direction 20 of the fluid flow 18. Is achieved by facing). The slot extends in the longitudinal axis of the cylinders 10, 12 and is connected to the ducts 2, 13 and the outside of the cylinder. Slots 6 and 22 are curved in form between ducts 2 and 13 and expanded inlets 3 and 24.

Description

Yarn treatment method and device

The invention relates to a method of treating textile yarns and an apparatus for performing the method, in particular an apparatus for making the desired properties in preparation for knitting, weaving or other forms. The invention also relates to a method and apparatus for false twist fabric multifilament yarns.

The process of weaving artificial textile yarns produces some undesirable properties for certain applications of the yarns. Without other treatments, combustible woven yarns produce elongated yarns suitable as fabrics used in meriyas, bathing suits, ski suits and the like.

In fabrics that require less elongation, the fabric yarn is increased in the second heating step of the textile machine under relaxation to reduce the stretch properties of the yarn but retain it in bulk. The problem of such yarns is the lack of cohesion of the filaments that are dissipated during processing, which leads to entanglement or questioning in the fabric formation. Another problem associated with such yarns is residual torque or kinking. This results in entanglement in the yarn, which reduces the efficiency of fabric production and / or impairs the quality of the fabric made from the yarn.

In order to improve the cohesion of the filaments, combustible yarns are subjected to hybridization and generate node points in the yarns where the filaments are twisted together. A device for that purpose comprises a cylinder with a yarn duct and is usually circular and extends through the cylinder and one or more air jets affect the duct. That is, transverse to the yarn path as in EP-A-0140526. Unfortunately, this type of cylinder has no torque reduction or no torque effect on the yarns. This process weakens the entanglement without alleviating the problems associated with residual torque. Passing the combustible fabric yarn through the cylinder reduces residual torque and the air jet branches off the centerline of the yarn duct through the nozzle to provide rotation of the airflow in the duct to give the yarn a small combustibility in the opposite direction to the residual torque. The device is described in EP-A-0532458 and the air jet is tangential to the duct. However, the action of the air jet in such cylinders separates the filaments and reduces cohesion. Torque-free and hybridization are performed by separate air nozzles. But this is an expensive solution. Because two air nozzles are required, the two types of nozzles operate at significantly different air pressures and two manifolds or expensive valves. For this reason, various devices of combined nozzles have been improved in an attempt to perform both simultaneously. An example is the branching of an air jet in the axis of a yarn duct. However, the device provides a low strength blend of yarn filaments and at the same time provides a small measure of torque reduction. In addition, such devices are sensitive to tolerances and do not provide predictable no-torque effects or hybrids at high yarn throughput rates.

The object of the invention is to provide a method and apparatus suitable for carrying out the method and to produce a continuous and predictable torque-free effect in the combustible fabric yarns with a predictable high strength hybrid effect.

The invention provides a method of treating multiple filament combustible yarns and includes guiding the combustible yarns through a duct along the yarn path and allowing fluid to flow in the transverse direction of the yarn path, the yarn paths causing the inlet fluid flow to hybridize the filaments of the yarns. The fluid flows around the yarn path to reduce the residual torque and to be at the center of the.

The method diverges with respect to both sides of the yarn path such that the two fluid jets face in parallel and rotate around the yarn path. Alternatively, the method inclines at right angles to the direction of the inlet so that the fluid is directed towards the actual flat base surface of the duct facing the inlet for the flow of fluid into the duct and the fluid rotates around the yarn path. In this case the yarns are guided around the fluid inlet to take advantage of the yarn's combustible and filament hybridization under tension.

The fluid is directed at right angles to the yarn path or through the duct in the direction with the element facing the yarn.

The invention includes a cylinder comprising a yarn duct providing an apparatus for carrying out the method and providing a yarn path extending longitudinally, the fluid supply being in transverse direction of the yarn path through the yarn duct and towards the base surface of the duct. The fluid path includes and the yarn path is the center of the fluid flow to cause mixing of the filaments of the yarn and the device is directed to rotate around the yarn path to reduce the residual torque.

The device comprises two opposing and parallel fluid inlets for hybridization of the filaments and branches from one another on the opposite side of the yarn path such that the fluid rotates around the yarn path. Alternatively, the duct includes an inlet for the fluid and the base surface is planar and inclined from a right angle in the direction of the fluid so that the fluid rotates around the inner path. The fluid inlet is perpendicular to the yarn path and slopes in the yarn direction through the duct. A plurality of fluid inlets spaced along the duct are provided.

The yarn duct is triangular in cross section and the fluid inlet communicates with the yarn duct at a triangular apex position between the two sides and facing the base surface. As the torque-free effect changes in the treated yarn, the variable of the device is the angle of the base surface in the vertical direction of the fluid inlet. This angle ranges from 2 ° to 45 ° and is actually 20 °.

The apparatus includes a yarn guide disposed at the inlet end of the yarn duct and includes a second yarn guide at the outlet end of the yarn duct. Yarn guidance is arranged to guide the yarn acting through the yarn duct so that the yarn path is near the location of the fluid inlet.

Other parameters of the device that affect the mixing and no-torque effect of the device are the height of the yarn duct and the diameter of the fluid inlet between the air inlet and the base surface. Such variables are chosen for the desired hybridity and torque-free properties in the yarn to be treated and are between 1 and 44 mm (example 2 mm) and 1 to 2.5 mm (example 1.65 mm).

The device includes a slot extending in the longitudinal axis of the cylinder and to which the yarn duct is connected to the outside of the cylinder. The slot is connected with the yarn duct at the central position of the intersecting fluid inlet. Or at a side of the second position around the fluid inlet and between the fluid inlet and the edge of the base surface close to the fluid inlet. The slot is curved between the inlet end and the second position communicating with the outside of the cylinder. The inlet end is enlarged with respect to the width of the slot.

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1 is a side view of a first embodiment.

2 is a front view of the device of FIG. 1;

3 is a plan view of a second embodiment.

4 is a front view of the third embodiment.

5 is a front view of a fourth embodiment.

6 is a side view of the FIG. 4 embodiment.

7 is a side view of the FIG. 5 embodiment.

* Code Description

2 ... Yarn Duct 3 ... Channel

4 ... wall 6 ... slot

8, 9 ... air intake 10 ... cylinder

11 ... not the path

The torque reducing device, which is mixed in FIGS. 1 and 2, comprises a cylinder 10 comprising a central axis through a hole forming a yarn duct 2. Such a device 10 is arranged after a second heater of a conventional double heater false twist device. The cylinder 10 comprises a V-shaped channel 3 formed in the outer shell. The channel 3 branches laterally in the longitudinal axis of the yarn path 11 through the cylinder 10 such that the wall 4 of the channel 3 is of different length. The walls 4 are collected at the vertices 4 which are almost perpendicular to each other and are connected to the yarn duct 2 by slots 6. Slot 6 is curved, ending in yarn duct 2.

In the middle of the length of the yarn duct 2, the air intakes 8, 9 extending across the yarn duct 2 face each other.

The air intakes 8, 9 are almost parallel and spaced perpendicularly to each other by the distance indicated by z in FIG. 1. The longitudinal axis of each air inlet 8, 9 branches vertically in the yarn path 11. The slot 6 is positioned so that the yarn duct 2 meets the air intake 9.

The combustible yarns to be treated pass axially through the yarn duct 2 and are affected by the air stream from the air inlets 8, 9. The yarn is placed in the duct 2 by conveying it through the slot 6. The slot 6 is shaped such that no departure occurs in the duct 2 under the influence of the air stream. When the air stream affects the yarns, the mixing of the filaments is affected by the opposite air stream. At the same time the mutual divergence of the air stream vortices in the yarn ducts, which causes the yarns not to twist and reduces residual torque. The position and size of the air intakes 8, 9 have improved product properties, designed with precision and prediction to provide the desired degree of mixing and torque reduction. The size of the device depends on the desired properties and the yarns. For example, the diameter of the yarn duct 2 is in the range of 0.8 to 4.0 mm. The diameter of the air intake port is about 0.4 to 2.5 mm. The branch between the longitudinal axes of the air intake port is 0.2 to 1.2 mm. Different applications of design variables are as follows.

TABLE 1

Jet format Jet features One 2 3 Air intake diameter (mm) 0.6 1.2 1.7 Number of air inlets 2 2 2 Air intake branch (mm) 0.25 0.2 0.3 Yarn duct diameter (mm) 1.4 2.0 2.8 Yarn Duct Length (mm) 15 15 20

The variables shown in the jet form are used to produce yarns containing low residual torque and low levels of hybridization. Alternatively, jet type 2 is chosen if it produces 1/150 denier yarns at high speeds, including low residual torque and high levels of hybridization. This is provided by selecting the air pressure of the stream provided to well blended yarns with low residual torque. The variable of jet type 3 is used for the high level and low residual torque mixed in 1/300 denier yarns. The air intakes 8, 9 may not be circular in cross section if desired.

It may also be inclined in the yarn traveling direction as shown in FIG. In this case, the air inlets 108 and 109 are inclined at an angle B of 15 ° to assist the passage of the yarn through the duct 2 to eliminate the tendency of the stream to apply tension to the yarn.

4 and 6 there is shown a nozzle arrangement 40 comprising an expanded cylinder 12 with a yarn duct 13 providing a yarn path 11 extending longitudinally through the cylinder 12. Yarn duct 13 is a triangular cross section formed by two sides 15, 16 and a planar base surface 17. The air inlet 18 communicates with the yarn duct 13 at position 19 and the position 19 is a triangular peak facing the base surface 17 and in the axial direction 20 crossing the yarn path 11. . The base surface 17 is inclined at an angle A of the yarn duct 13 at a right angle in the axial direction 20 of the air intake 18. Angle A ranges from 5 ° to 45 ° to give the required reduced torque effect (preferably around 20 °).

The cylinder 12 includes a slot 22 in communication with the yarn duct 13. Slot 22 communicates with yarn duct 13 at side 16 adjacent air inlet 18. The second position 23 is at the short side 16 and the slot 22 is at the second position 23 and the inlet to reduce the likelihood of the yarn 14 leaving the slot 22 during use of the nozzle 40. It has a curved shape between the ends 24. The inlet end 24 extends over the width of the slot 22.

Yarn guide 25 guides the yarn 14 through the duct 13 along the path 11 disposed at the input and output ends of the nozzles 40 and 26 and adjacent to the suction position 19 of the air inlet 18. To be located. The air exiting the air inlet 18 affects the yarn 14 to give the yarn 14 a high intensity hybrid effect. The force of air acting on the yarn 14 pushes toward the base surface 17. The air produces a rotating air stream that includes a combustible or low torque effect at the yarn 14 towards the base surface 17 inclined to the longer side 15. When the yarn 14 is moved away from the air intake position 19, the air force decreases the tensile force from moving the yarn behind the intake position 19 to increase the force of the air.

The hybrid effect in the yarn 14 is intermittent so that it occurs and is spaced along the length of the yarn 14 at regular intervals determined by the air pressure and tensile force used. Another variable affecting the mixing and separation viscosity of the nodes is the diameter of the air intake 18 and the distance of the suction position 919 at the base surface 17. At 150 denier yarns it is about 1.6 mm and 2 mm in size, but is generally in the range of 1-25 mm and 1-4 mm.

6 and 7 show the same nozzle 26 as the nozzle 40. Firstly, the nozzle 26 comprises a yarn duct 13 which is actually a semicircle because the shapes 15 and 16 of the side walls are not important. Secondly, the air inlet 18 at the nozzle 26 is inclined with respect to the longitudinal axis of the duct 13 defined by the angle B in order to convey the yarn 14 acting in the direction of the arrow. The angle B is in the range of 5 ° to 15 ° to give a conveying effect but not to reduce the hybrid effect. The semicircle of the duct 13 of the nozzle 26 is used as the orthogonal air inlet 18 of the nozzle 40 or the triangular form of the duct 13 is used as the inclined air inlet 18.

The base surface 17 of the yarn duct 13 in the nozzles 40, 26 of the invention is actually planar and the tolerance sensitivity of the nozzles 40, 26 is considerably smaller than that of a known nozzle with branch air inlets for flammable effects. . Combustible yarns follow a hybrid process to provide predictable high strength hybrid effects as well as predictable low torque effects.

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Claims (14)

In a method of treating multiple filament combustible yarns (14) comprising guiding the combustible yarns (14) through ducts (2,13) along the yarn paths (11) and directing fluid in the transverse direction of the yarn paths (11). Yarn path 11 is the center of inlet fluid flow 8, 9, 18 that hybridizes the filaments of yarn 14 and flows around yarn path 11 to reduce residual torque in yarn 14. A treatment method characterized by improving. 2. The method according to claim 1, wherein the two fluid inlets (8, 9) are parallel and opposite and the branches to each other cause the fluid to rotate around the yarn path. 2. The direction of the inlet port (18) according to claim 1, in which the fluid flows in the direction of the planar base surface (17) of the duct (13) facing the inlet port (18) for the flow of fluid into the duct (13) and rotates around the yarn path. And (20) perpendicular to (20). 4. A method according to claim 3, characterized by guiding a tensioned yarn (14) adjacent the inlet (18) for fluid to flow into the duct (13). Apparatus for carrying out the method of claim 1, wherein the bases of the ducts 2, 13 and the expanded cylinders 10, 12 with the yarn ducts 2, 13 providing the yarn paths 11 extending longitudinally. The fluid flows in a direction perpendicular to the yarn path 11 in the direction of the surface 17 and includes fluid supply 8, 9, 18 in communication with the yarn ducts 2, 13, and the yarn path 11 of the yarn 14. Characterized in that it is the center of the fluid flow 8, 9, 18 causing the filament to hybridize and the device 8, 9, 17 rotates around the yarn path 11 to reduce residual torque in the yarn 14. Device. 6. Device according to claim 5, characterized in that the two fluid inlets (8, 9) are opposite and actually parallel and relatively separated on the opposite side of the yarn path (11) to rotate around the yarn path (11). . 6. The duct (13) according to claim 5, wherein the duct (13) comprises an inlet (18) for the flow of fluid into the duct (13) and the base surface (17) in the direction of the fluid intake (18) to rotate around the yarn path (11). Device characterized in that it is inclined at a plane perpendicular to the plane. 8. Device according to claim 7, characterized in that the yarn duct (13) is a triangular cross section. 9. Device according to claim 8, characterized in that the fluid inlet (18) is in communication with the yarn duct (13) between the two sides (15, 16) and at a triangular apex position (19) facing the base surface (17). 10. The yarn of claim 5, wherein the first and second yarn guides 25 are at the inlet and outlet of the yarn duct 13 and the yarn guides 25 guide the yarn 14 operating through the yarn duct. Yarn path (11) arranged so as to be adjacent to position (19) of fluid inlet (18). Device according to one of the claims 5 to 10, characterized in that the slot (6,22) extends in the longitudinal axis of the cylinder (10,12) and communicates with the yarn duct (2,13) and the outside of the cylinder. 12. The slot (6, 22) according to claim 11, characterized in that the slots (6, 22) are curved in shape between the suction ends (3, 24) communicating with the outside of the cylinders (10, 12) and the position (19) connected with the yarn ducts (2, 13). Device. Device according to claim 11, wherein the slot (6) communicates with the yarn duct (2) at the central position of the fluid intake (9) when subordinate to claim 6. The slot 22 is in communication with the yarn duct 13 in a second position 23 of the side 16 adjacent to the fluid inlet 18, when dependent on claim 7. The position (23) is characterized in that it is between the edge of the base surface (17) close to the fluid inlet (18) and the fluid inlet (18).