JP7033880B2 - A device that cools the heated yarn - Google Patents

Description

The present invention relates to the apparatus for cooling the heated yarn according to the premise of claim 1.

It is known that during the production of synthetic yarns, the smooth yarns produced after melt spinning are subjected to winding processing in the texture processing process. Therefore, in the yarn, false twists are generated inside the so-called textured zone, and the false twists are fixed in the filament of the yarn by heat treatment. For example, usually synthetic yarns are first heated to a temperature in the range of 200 ° C. in the textured zone. The plasticity of the yarn material obtained at this time causes twisting in the individual filaments (einpraegen). To secure this yarn structure, the yarn is then immediately cooled to a temperature of about 80 ° C. Cooling of the yarn is preferably carried out by an air-cooled cooling rail, in which the yarn is guided in contact on the surface of the cooling rail. However, such cooling rails basically have the disadvantage that a relatively long cooling section is required to achieve sufficient cooling of the yarn. To avoid even stronger friction, a thread guide is needed to prevent premature wear of the cooling rail with as little wrapping as possible.

However, in another device for cooling the heated yarn, which is also known in the prior art, the cooling of the yarn is carried out using a coolant in order to realize the shortest possible cooling interval. The present invention originates from this type of prior art.

Such devices are described, for example, in European Patent Application Publication No. 0403098 (EP 0 403 098 A2). In this known device for cooling a heated yarn, the cooling body is provided with a cooling groove, and the cooling body has a plurality of recessed groove pockets in the groove bottom of the cooling groove. .. Since the cooling groove is connected to the cooling liquid reservoir via the capillary tube, the cooling liquid is continuously housed in the cooling liquid. The heated yarn is guided through the cooling groove in a contact state and cooled by the coolant. The yarn is then guided via a subsequent cooling rail.

In known equipment, the cooling body forms a relatively short cooling section, at which time excess coolant is collected at the termination of the cooling body and returned to the tank. In a textured machine consisting of a large number of such devices for cooling the heated yarn, there is therefore a need for a device that collects the coolant and compensates for the coolant loss. Such devices for cooling heated yarn have not previously been established, especially considering the requirements for environmental protection. Reuse of excess coolant is also linked to high equipment costs.

Therefore, an object of the present invention is to improve such a device for cooling a heated yarn so that the yarn can be sufficiently cooled with as little coolant as possible.

Therefore, it is also an object of the present invention to improve such a device for cooling the heated yarn so that as little coolant surplus is produced as possible.

This task has a cooling groove having a plurality of guide portions having a corrugated groove bottom and at least one guide portion having a smooth groove bottom by a device for cooling the heated yarn. A plurality of guide portions and at least one guide portion are alternately formed one after the other, and the metering opening is one of the guide portions having a groove bottom portion with a corrugated groove. It is solved by being placed in front of one guide portion in the run-in area of the cooling groove.

A preferred development of the invention is defined by the features and combinations of features of each dependent claim.

The present invention has recognized that the corrugated groove bottom of the cooling groove significantly enhances the wetting of the yarn in the run-in region of the cooling groove. For example, the continuous accompaniment of the coolant fed to the yarn is blocked by the corrugated groove at the bottom of the groove. On the other hand, the corrugated groove at the bottom of the groove is suitable for scraping off the non-evaporated residual coolant adhering to the yarn and for keeping it in the cooling groove. In this way, the yarn can be uniformly moistened over a relatively long section, so that the obtained cooling effect becomes strong. To make full use of this cooling effect for yarn cooling, at least one guide section is provided with a smooth groove bottom where the yarn is cooled by a pre-supplied coolant. Will be done. Therefore, the different guide portions of the cooling groove promote strong cooling with a minimum coolant supply.

Further improving the cooling effect inside the cooling groove by having the guide portion with the smooth groove bottom having a larger groove depth than the guide portion having the groove bottom with the corrugated groove. Can be done. The yarn can be guided through the cooling groove in contact and non-contact conditions. In the guide portion with the smooth groove bottom, the yarn does not come into contact, so only the coolant acts to cool the yarn.

In order for the thread to obtain reliable guidance inside the cooling groove, each of the corrugated groove bottoms of the guide portion has a plurality of recessed groove pockets and a plurality of guides located between the groove pockets. Formed by the web. With this configuration, the yarn can travel through the cooling groove in contact with the guide web.

The length of the cooling groove is generally selected in relation to the yarn to be cooled and the yarn count thereof each time. For example, a yarn having a relatively large yarn count requires a relatively long cooling groove. In order to obtain the effect of the present invention for effective cooling in each thread type, in a preferred development of the present invention, the guide portions each have a length portion of the cooling groove in the range of 10 mm to 60 mm. Have.

For example, in the case of a large yarn count and a reasonably long cooling groove, it is common to provide a plurality of guide portions with a smooth groove bottom. At this time, since the guide portion having the smooth groove bottom always sandwiches one of the guide portions having the groove bottom with the corrugated groove, the contact zone and the non-contact zone in the cooling groove are always sandwiched. And are continuous alternately.

In order to ensure that the yarn is guided at the bottom of the cooling groove even at a relatively large length of the cooling groove, the guide portion of the cooling groove is further provided so that the bottom of the cooling groove is 300 mm to 1000 mm in the thread traveling direction. They are arranged relative to each other so that they have a guide curvature with a radius in the range of. With such a configuration, a relatively strong yarn turning can be achieved, especially in a textured processing machine, without additional increase in wear.

The guide portion of the cooling groove can basically be formed in an integral cooling body. In order to manufacture such a cooling groove, however, in a preferred development of the present invention, the guide portion of the cooling groove is formed by a plurality of segments of the cooling body arranged one after the other in phase with each other. Is held by a support. When configured in this way, the combined segments give rise to a cooling body with the cooling grooves needed for thread guidance.

In the developed embodiments of the present invention, which have been found to be particularly suitable at this time, a segment of the cooling body having a guide portion having a groove bottom with a corrugated groove and a guide portion having a smooth groove bottom. The segments of the cooling body are made of different materials. With this configuration, the segments required for thread contact in the cooling groove can be formed from a wear resistant material accordingly.

In a particularly preferred evolution of the invention of the invention, in order to avoid direct load on the perimeter of the machine, the cooler is placed between the yarn inlet and the yarn outlet inside the housing. A suction opening is formed in the housing in the region of the yarn outlet, and the suction opening can be connected to the suction device. With such a configuration, the steam generated when the yarn is cooled is prevented from flowing out to the surroundings without being hindered.

Further, a suction opening is formed between the cooling body and the thread outlet at the bottom of the housing in order to discharge the residual coolant that may be generated together with the steam. With such a configuration, the suction flow can be suitably used because the suction action is exerted on the freely guided thread portion before the outflow from the housing.

In a preferred evolution of the invention, an inlet thread guide is correspondingly arranged at the thread inlet of the housing so that the thread cooling device can be incorporated into the machine frame or thread runway as flexibly as possible. An outlet thread guide is correspondingly arranged at the thread outlet of the housing. With such a configuration, a reproducible thread guide can be suitably produced. No special orientation of the cooler inside the textile machine is required.

Therefore, the apparatus according to the present invention is particularly suitable for use in a textured processing machine provided with a plurality of processing units. In each processing unit, the apparatus according to the present invention can carry out equal processing and thus uniform cooling.

Next, a plurality of embodiments of the apparatus according to the present invention for cooling the heated yarn will be described in detail with reference to the accompanying drawings.

It is a vertical sectional view schematically showing the 1st Embodiment of the apparatus which concerns on this invention. FIG. 2.1 is a schematic cross-sectional view of the embodiment shown in FIG. 1, and FIG. 2.2 is another schematic cross-sectional view of the embodiment shown in FIG. It is a vertical sectional view schematically showing another embodiment of the apparatus which concerns on this invention.

1, FIG. 2.1 and FIG. 2.2 schematically show a first embodiment of the apparatus according to the present invention for cooling a heated yarn in a plurality of drawings. FIG. 1 shows a vertical cross-sectional view of the present embodiment, and FIGS. 2.1 and 2.2 show two cross-sectional views of the present embodiment. Therefore, if one of the drawings is not explicitly referred to, the following description is for both drawings.

The present embodiment has a vertically long cooling body 1. An open cooling groove 2 extends above the cooling body 1. The cooling groove 2 extends to reach both end faces of the cooling body 1. Therefore, the cooling groove 2 forms the thread running-in portion 7 at one end face portion and the thread running-out portion 8 at the end face portion located on the opposite side.

In order to guide the thread between the thread entry portion 7 and the thread exit portion 8 inside the cooling groove 2, the cooling groove 2 is provided with a plurality of geriffelt groove bottom portions 4.1. It has a guide portion 6.1 and a plurality of guide portions 6.2 having a smooth groove bottom portion 4.2. These guide portions 6.1 and 6.2 are alternately formed in the cooling groove 2 in the thread traveling direction.

A first guide portion 6.1 having a groove bottom portion 4.1 with a corrugated groove is correspondingly arranged in the thread running portion 7. A run-in region 20 is placed in front of the groove bottom portion 4.1 having a corrugated groove in the first guide portion 6.1, and a metering opening 3 is opened in this run-in region 20. .. The metering opening 3 is connected to the fluid line 5.1 via a metering passage inside the cooling body. The fluid pipeline 5.1 is connected to a metering device 5, which has a metering means 5.2 and a container 5.3. The metering means 5.2 is preferably formed as a metering pump, and at this time, the cooling liquid is contained in the container 5.3.

As can be seen from the drawings of FIGS. 1, 2.1 and 2.2, the guide portions 6.1 and 6.2 have different groove depths at the respective groove bottoms 4.1 and 4.2. ing.

FIG. 2.1 shows a cross section of a guide portion 6.1 having a groove bottom portion 4.1 with a corrugated groove. The groove bottom 4.1 with the corrugated groove is formed by a plurality of deeply formed groove pockets 9 and a plurality of guide webs 10, and these guide webs 10 are raised between the groove pockets 9. is doing. The guide web 10 has _a groove depth indicated by reference numeral t1. The groove pocket 9 is deeply formed in the cooling body ₁ and has a relatively large groove depth indicated by reference numeral t3 in FIG. The guide web 10 is formed with a web width of only a few millimeters. Similarly, the groove pocket has a small width of a few millimeters.

FIG. 2.2 shows a cross section of a guide portion 6.2 with a smooth groove bottom 4.2. The smooth groove bottom 4.2 has a groove depth indicated by reference numeral t2 in _FIG . The groove depth t ₂ of the smooth groove bottom portion 4.2 is formed to be slightly larger than the groove depth t ₁ of the groove bottom portion 4.1 having a corrugated groove. Therefore, the relationship t ₂ > t ₁ holds.

As can be seen from the drawing of FIG. 1, the guide portions 6.1 and 6.2 of the cooling groove 2 form a guide curvature in which the groove bottom portions 4.1 and 4.2 have a radius R in the thread traveling direction. Have been placed. In relation to the length of the cooling groove 2 or the cooling body 1 and in relation to the yarn count, the radius R of the guide curvature is in the range of 300 mm to 1000 mm. As a result, reliable thread guidance is achieved between the thread running section 7 and the thread running section 8. At this time, the yarn is contacted and guided only at the guide portion 6.1 provided with the groove bottom portion 4.1 having the corrugated groove. The yarn is guided without contact at the guide portion 6.2 with a smooth groove bottom 4.2. As a result, a contact zone and a non-contact zone are generated inside the cooling groove when the yarn is guided.

During operation, a small amount of coolant is metered through the metering device 5 and supplied to the guide portion 6.1 in the region of the thread running portion 7. The running thread partially receives the coolant directly and distributes it through the corrugated grooved structure of the groove bottom 4.1. This provides a relatively long contact zone for wetting the yarn. The guide portion 6.1 has a length portion L1 for that purpose, and the length portion L1 has _a range of 20 mm to 60 _mm depending on the yarn count.

In the further extension region of the cooling groove 2, a non-contact zone continues, in which the yarn is guided without contact at the guide portion 6.2 of one of the guide portions. In this guide portion, the applied liquid acts to cool the yarn. The guide portion 6.2 also has a length portion of the cooling groove 2, and this length portion has an equal length depending on the yarn count. This length portion is indicated by reference numeral L2 in _FIG . 1 and is in the range of 10 mm to 60 mm.

In the further extending region of the cooling groove 2, a contact zone with a corrugated groove bottom 4.1, a non-contact zone with a smooth groove bottom 4.2, and a corrugated groove. It is followed by another guide portion 6.1, which is provided with a bottom portion 4.1 and is arranged corresponding to the thread running portion 8. A central guide section 6.1 with a corrugated groove bottom 4.1, on the one hand, removes excess coolant from the yarn and at the same time homogenizes the wetting, thereby obtaining further cooling. Can be done. At the final guide portion 6.1 of the yarn run-out portion 8, the yarn is pulled out of the cooling groove 2 with almost no excess coolant adhering to it.

The alternating combination of corrugated groove bottoms 4.1 and smooth groove bottoms 4.2 provides strong cooling of the yarn with minimal coolant usage. As a result, excess coolant can be suitably avoided.

The cooling body is usually encapsulated in a housing to prevent the vapor generated during cooling from being released to the surroundings of the machine. Therefore, FIG. 3 schematically shows another embodiment of the apparatus according to the present invention for cooling the heated yarn in a vertical cross-sectional view. In the embodiment shown in FIG. 3, the cooling body 1 is formed by a plurality of segments 11.1 to 11.7, and each of these segments 11.1 to 11.7 is cooled open to the surface thereof. It has a partial region of the groove 2. The segments 11.1 to 11.7 are arranged one after the other and are held by the support 12. At this time, each of the segments 11.1 to 11.7 has a guide portion 6.1 having a groove bottom portion 4.1 with a corrugated groove and a guide portion 6.2 having a smooth groove bottom portion 4.2. Is forming. The guide portions 6.1 or 6.2 formed by the segments 11.1 to 11.7 are formed in the cross section in the same manner as the embodiments shown in FIGS. 2.1 and 2.2. Therefore, the yarns are contacted and guided in segments 11.1, 11.3, 11.5, 11.7. The segments 11.2, 11.4, 11.6 have a smooth groove bottom 4.2, so that the yarn is guided here without contact.

The cooling body 1 formed by the support 12 and the segments 11.1 to 11.7 is arranged inside the housing 13. The housing 13 surrounds the cooling body 1, and at this time, the cooling body 1 is arranged between the thread inlet 14 and the thread outlet 15 inside the housing 13. In the present embodiment, the thread inlet 14 is formed by the inlet thread guide 14.1 and the thread outlet 15 is formed by the outlet thread guide 15.1. Basically, the thread guides 14.1, 15.1 may be arranged inside the housing 13 or outside the housing 13, regardless of the thread inlet 14 and the thread outlet 15. ..

In the present embodiment, the inlet thread guide 14.1 and the outlet thread guide 15.1 are arranged at short intervals with respect to the end face portion of the cooling body 1. At this time, the guide grooves of the thread guides 141 and 15.1 cooperate with the groove bottom portion 4.1 of the cooling groove 2 for thread guidance.

In the region of the thread outlet 15, a suction opening 17 is formed in the bottom portion 16 of the housing 13 inside the housing 13. The suction opening 17 is arranged between the end face portion of the cooling body 1 and the outlet thread guide 15.1. The suction opening 17 is connected via a suction line 18 to a suction device not shown in detail here.

The housing 13 has an air opening 19 in the run-in region on the opposite side. The air opening 19 is formed in the region between the inlet thread guide 14.1 and the end face portion of the cooling body 1. The air opening 19 is open to the periphery of the housing 13.

The supply of coolant is ensured by a metering device 5 located on the outside of the housing. The metering device 5 therefore comprises a metering means, such as a metering pump and a container 5.3, the container 5.3 being filled with a coolant. The metering means 5.2 is connected to the metering passage 3.1 in the first segment 11.1 of the cooling body 1 via the fluid line 5.1.

During operation, the metering device 5 continuously pumps a predetermined amount of coolant through the metering opening 3 into the run-in region 20 of the cooling groove 2. Therefore, the run-in area 20 is preceded by the guide portion 6.1 in the first segment 11.1. At this time, the run-in region 20 in the cooling groove 2 has substantially the same groove depth with respect to the groove bottom portion 4.1 having the corrugated groove.

To cool the heated yarn, the yarn is inserted into the housing 13 at the start of the process. The yarn is then guided through the cooling groove 2 by the inlet yarn guide 14.1 and the outlet yarn guide 15.1. The yarn travels through the cooling groove 2 in contact with the groove bottom portion 4.1 having the corrugated groove of the guide portion 6.1. In the present embodiment, a total of four segments 11.1, 11.3, 11.5, 11.7 are provided to guide the yarn in the cooling groove 2 in a contact state. At this time, the yarn is wetted by the coolant and cooled by the evaporation of the coolant. The steam generated at this time is collected in the housing 13 and discharged through the suction opening 17. At this time, a continuous fresh air flow is introduced into the housing 13 through the air opening 19. A uniform air flow is generated in the yarn traveling direction, and this air flow promotes the discharge of steam on the upper side of the cooling groove 2. Further, on the yarn outlet side, the air flow is used to suck the residual coolant loosely adhering to the yarn portion freely guided between the cooling body 1 and the outlet yarn guide 15.1 from the yarn. This makes it possible to prevent the residual liquid from seeping out from the housing 13.

The apparatus according to the present invention for cooling a heated yarn is particularly suitable for use in a textured processing machine including a plurality of processing units located side by side with each other. For example, a plurality of such devices can be used in one texture processing machine. Despite the strong cooling of the yarn by the coolant, no load is generated on the surroundings in the texturer. Due to the very small amount of residual liquid, there is no need to collect and reuse the coolant after cooling the yarn (Aufbereiten).

In the illustrated embodiment, the number of different guide portions of the cooling groove is an example. For thread guidance, one guide portion with a grooved bottom with a corrugated groove is required at least in the thread entry and thread exits of the cooling groove. In such cases, the cooling groove will have only one guide portion in the central region with a smooth groove bottom. The lengths of the different guide portions may be formed equally or may be formed with different lengths.

Claims (9)

A device for cooling a heated yarn, comprising a cooling body (1), the cooling body (1) having a vertically long cooling groove (2) for guiding the yarn. The cooling groove (2) is connected to the metering device (5) via the metering opening (3) at the groove bottom (4.1, 4.2) in order to supply the cooling liquid. In
The cooling groove (2) has a plurality of guide portions (6.1) having a groove bottom portion (4.1) with a corrugated groove, and at least one having a smooth groove bottom portion (4.2). It has a guide portion (6.2), and the plurality of guide portions (6.1) and the at least one guide portion (6.2) are alternately formed one after the other. The metering opening (3) is provided in the cooling portion (6.1) of one of the guide portions (6.1) provided with the groove bottom portion (4.1) having the corrugated groove. It is placed in front of the run-in area (20) of the groove (2) .
The guide portion (6.2) with the smooth groove bottom (4.2) is more than the guide portion (6.1) with the groove bottom (4.1) with the corrugated groove. It has a large groove depth (t ₂ > t ₁ ) and has a large groove depth (t 2> t 1).
The corrugated groove bottom portion (4.1) of the guide portion (6.1) is located between the plurality of recessed groove pockets (9) and the groove pockets (9), respectively. , Formed by a plurality of guide webs (10) extending laterally in the thread running direction.
A device for cooling heated yarn, which is characterized in that. The apparatus according to claim 1, wherein each of the guide portions (6.1, 6.2) has a length portion of the cooling groove (2) in the range of 10 mm to 60 mm. The cooling groove (2) has a plurality of the guide portions (6.2) provided with the smooth groove bottom portion (4.2), and the guide portions (6.2) are sandwiched between the guide portions (6.2). The first or second aspect of the present invention, wherein at least one guide portion (6.1) of the guide portion (6.1) provided with the groove bottom portion (4.1) having the corrugated groove is sandwiched. Device. The guide portion (6.1, 6.2) of the cooling groove (2) has a guide curvature in which the groove bottom portion (4.1, 4.2) has a radius in the range of 300 mm to 1000 mm in the thread traveling direction. The device according to any one of claims 1 to 3 , which is arranged with respect to each other so as to have. The guide portion (6.1, 6.2) of the cooling groove (2) is formed by a plurality of segments (11.1 to 11.7) arranged in front of and behind each other of the cooling body (1). The apparatus according to any one of claims 1 to 4 , wherein the segment (11.1 to 11.7) is held by a support (12). The segment (11.1-11.7) of the cooler (1) having the guide portion (6.1) with the groove bottom (4.1) with the corrugated groove and the smoothing. The segment (11.1 to 11.7) of the cooling body (1) having the guide portion (6.2) provided with a groove bottom (4.2) is formed of a material different from each other. The device according to claim 5 . The cooling body (1) is arranged between the thread inlet (14) and the thread outlet (15) inside the housing (13), and is located in the housing (13) in the region of the thread outlet (15). The device according to any one of claims 1 to 6 , wherein a suction opening (17) is formed, and the suction opening (17) can be connected to a suction device. The device according to claim 7 , wherein the suction opening (17) is formed between the cooling body (1) and the thread outlet (15) at the bottom of the housing (16). An inlet thread guide (14.1) is correspondingly arranged at the thread inlet (14) of the housing (13), and an outlet thread guide (15.1) is arranged at the thread outlet (15) of the housing (13). ) Correspondingly arranged, according to claim 7 or 8 .

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